JP6472650B2 - Electric heater for vehicle air conditioner - Google Patents

Description

  The present invention relates to the structure of an electric heater provided in a vehicle air conditioner mounted on, for example, an automobile.

  Conventionally, for example, an air heater for a vehicle is sometimes provided with an electric heater for heating air for air conditioning (see, for example, Patent Document 1). The electric heater includes a PTC element and a heat dissipation fin, and a spring element for compressing the PTC element and the fin in the stacking direction. The PTC element, the fin and the spring element are stacked by a frame-type frame. Held in a state.

  In Patent Document 1, a plurality of support columns are provided that extend from the upper side portion to the lower side portion of the frame-type frame and connect the upper side portion and the lower side portion. The struts extend straight in the vertical direction and are arranged at equal intervals in the width direction of the frame-type frame. The air for air conditioning is heated by the heat of the PTC element while passing through the fins through the inside of the frame-type frame.

  In addition, the frame-type frame of Patent Document 1 is configured by combining an upstream member disposed on the upstream side in the air-conditioning air flow direction and a downstream member disposed on the downstream side. One of the upstream member and the downstream member is formed with a fitting projection, and the other is formed with a recess into which the fitting projection is fitted.

Japanese Patent No. 4939490

  By the way, in patent document 1, the frame type | mold frame is comprised with the some member of an upstream member and a downstream member. And the shape of an upstream member and a downstream member differs from the relationship of arrangement | positioning of the PTC element and fin to accommodate, and the shape and arrangement | positioning of the protrusion part for fitting, and a recessed part. Therefore, since a mold for molding the upstream side member and a mold for molding the downstream side member are required, the types of molds increase and the equipment cost increases.

  In addition, since the shapes of the upstream member and the downstream member are different, the upstream member and the downstream member must be manufactured as separate parts, and there is a problem that the types of parts increase.

  Furthermore, since the rough shape of the upstream member and the downstream member is common, at the assembly site of the electric heater, for example, the upstream members may be combined or the downstream members may be combined. There is concern that assembly will occur.

  The present invention has been made in view of such points, and the object of the present invention is to reduce the types of molds and the types of parts by sharing a plurality of members constituting the frame-type frame. Moreover, it is to suppress the occurrence of misassembly.

  In order to achieve the above object, in the present invention, the upstream side member and the downstream side member constituting the frame-type frame are point-symmetric.

The first invention is
A heating element that generates heat by supplying power;
Fins disposed in a stacked state on the heating element;
A frame-type frame that houses the heating element and the fins and holds the fins in a stacked state;
In the electric heater of the vehicle air conditioner in which the air-conditioning air blown into the frame-type frame is heated through the fins,
The frame-type frame is configured by combining an upstream member disposed on the upstream side of the air-conditioning air flow direction and a downstream member disposed on the downstream side,
The upstream side member includes a first side and a second side located on both sides in the stacking direction of the heating element and the fin, and a longitudinal direction of the second side from a longitudinal middle of the first side. It has a plurality of connecting portions extending to the middle portion and connecting the first side portion and the second side portion, and both end portions in the longitudinal direction of the first side portion and the second side portion are not mutually Cap members that are connected and cover both ends in the longitudinal direction of the first side and the second side are provided,
The downstream member includes a first side and a second side located on both sides of the heating element and the fin in the stacking direction, and a downstream side from a longitudinal intermediate portion of the first side of the downstream member. A plurality of connecting portions connecting the first side and the second side, the first side of the downstream member, and the second side of the member; Both end portions in the longitudinal direction of the second side portion are not connected to each other, and both end portions in the longitudinal direction of the first side portion and the second side portion of the downstream side member are respectively covered by the cap member. I,
The upstream member and the downstream member are made of parts that are point-symmetric with respect to a point that is located at the center of the upstream member when the frame-type frame is viewed from the air flow direction. It is characterized by that.

  According to this structure, it becomes possible to make an upstream member and a downstream member into the same shape. Therefore, the mold for molding the upstream member and the mold for molding the downstream member can be made the same to reduce the types of molds and the types of components. Furthermore, since the upstream side member and the downstream side member have the same shape, if the same parts are assembled at the assembly site, a frame-type frame is obtained, and as a result, occurrence of erroneous assembly is suppressed.

According to a second invention, in the first invention,
The upstream member and the downstream member are injection-molded by a mold having the same molding surface shape.

  According to this configuration, a mold having the same molding surface shape may be prepared when the upstream member and the downstream member are injection-molded.

According to a third invention, in the first or second invention,
The electric heater includes an urging member for applying an urging force so as to compress the heating element and the fin held in the frame-type frame in the stacking direction ,
The connecting portion of the frame-shaped frame, respectively provided with the upstream member and the downstream member of the upstream-side member,
The connecting portion of the upstream member extends while being inclined with respect to the first side and the second side,
The connecting portion of the downstream side member is inclined and extends in a direction opposite to the connecting portion of the upstream side member.

  According to this configuration, the first side portion and the second side portion of the frame-type frame are connected by the connecting portion, so that the first side portion and the second side portion are opened due to the urging force of the urging member. Is suppressed. At this time, since the connecting portion of the upstream member and the connecting portion of the downstream member extend in opposite directions, the strength of the entire frame frame is increased, and the deformation suppressing effect of the frame frame by the connecting portion is improved. .

According to a fourth invention, in the third invention,
The connecting portion of the downstream member is arranged so that at least a part of the connecting portion of the upstream member overlaps with the connecting portion of the upstream member when viewed in the flow direction of the air conditioning air.

  According to this configuration, when viewed in the flow direction of the air-conditioning air, the connecting portion of the upstream member and the connecting portion of the downstream member intersect each other, so that the strength of the frame-type frame is increased. The effect of suppressing deformation of the mold frame is further improved.

  According to the first invention, the upstream member and the downstream member constituting the frame-type frame are made of point-symmetric parts, so that the upstream member and the downstream member can be a common part. . Thereby, while being able to reduce the kind of metal mold | die, the kind of components can also be reduced and generation | occurrence | production of misassembly can be suppressed.

  According to the second invention, since the upstream member and the downstream member are injection-molded by the mold having the same molding surface shape, the same molding surface is formed when the upstream member and the downstream member are injection-molded. If a mold having a shape is prepared, the equipment cost can be reduced.

  According to the third aspect of the present invention, the connecting portions are provided on the upstream side and the downstream side, respectively, in the flow direction of the air-conditioning air, and the connecting portion of the downstream member is inclined and extends in the direction opposite to the connecting portion of the upstream member. Therefore, the effect of suppressing deformation of the frame-type frame by the connecting portion can be improved.

  According to the fourth invention, the connecting portion of the downstream member is at least partially overlapped with the connecting portion of the upstream member when viewed in the air-conditioning air flow direction, so that the strength of the frame frame is increased. It is possible to further improve the effect of suppressing the deformation of the frame-type frame.

It is the schematic of the vehicle air conditioner provided with the electric heater which concerns on Embodiment 1. FIG. It is the front view which looked at the electric heater from the flow direction upstream of the air-conditioning air. It is a disassembled perspective view of an electric heater. It is the front view which looked at the upstream member from the flow direction upstream of the air-conditioning air. It is the front view which looked at the frame type | mold frame from the flow direction upstream of the air-conditioning air. It is the VI-VI sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line in FIG. FIG. 3 is a view corresponding to FIG. 2 according to the second embodiment. FIG. 3 is a diagram corresponding to FIG. 3 according to a second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 is a diagram showing a schematic configuration of a vehicle air conditioner 1 including an electric heater 5 according to Embodiment 1 of the present invention. The vehicle air conditioner 1 is mounted, for example, inside an instrument panel (not shown) in the interior of an automobile, and can adjust the temperature of the air for air conditioning to be supplied to each part in the interior of the vehicle. .

  Specifically, the vehicle air conditioner 1 includes a casing 2, a blower fan 3, a cooling heat exchanger 4, and an electric heater 5. The blower fan 3, the cooling heat exchanger 4, and the electric heater 5 are accommodated in the casing 2. The blower fan 3 is for sending air for air conditioning. The cooling heat exchanger 4 is for cooling the air-conditioning air. The electric heater 5 is disposed downstream of the cooling heat exchanger 4 in the flow direction of the air-conditioning air in the casing 2 and heats the air-conditioning air. An air mix damper 6 is disposed inside the casing 2. The air mix damper 6 is for changing the temperature of the conditioned air by changing the amount of air passing through the electric heater 5. Further, a defroster damper 7, a vent damper 8 and a heat damper 9 are also arranged inside the casing 2. The defroster damper 7 is for changing the amount of the conditioned air blown toward the inner surface of the front window (not shown), and the vent damper 8 changes the amount of the conditioned air blown toward the upper body of the occupant. The heat damper 9 is for changing the amount of conditioned air blown out toward the vicinity of the passenger's feet.

  As shown in FIGS. 2 and 3, the electric heater 5 includes an upper heating element 50, a central heating element 51, a lower heating element 52, a plurality of fins 53, a spring (biasing member) 54, and a frame type. The frame 60 has a rectangular shape that is long in the left-right direction as a whole when viewed from the flow direction of the air-conditioning air. The upper heating element 50, the central heating element 51, and the lower heating element 52 are provided with a plurality of PTC elements (not shown) that generate heat by supplying power from a battery or the like (not shown) mounted on the vehicle. It has the same structure and has a long plate shape in the left-right direction. Inside each of the upper heating element 50, the central heating element 51, and the lower heating element 52, a plurality of PTC elements are arranged in the left-right direction.

  The upper heating element 50 is disposed above the central portion in the vertical direction of the electric heater 5. As shown in FIG. 3, an electrode plate 50a connected to the PTC element is provided at the right end portion of the upper heating element 50 so as to protrude to the right side. The central heating element 51 is disposed at the center in the vertical direction of the electric heater 5. An electrode plate 51a connected to the PTC element is provided at the right end portion of the central heating element 51 so as to protrude to the right side. The lower heating element 52 is disposed below the central portion in the vertical direction of the electric heater 5. An electrode plate 52a connected to the PTC element is provided at the right end portion of the lower heating element 52 so as to protrude to the right side.

  The fins 53 are continuous corrugated fins that are long in the left-right direction. The fins 53 are disposed on the upper and lower surfaces of the upper heating element 50, the upper and lower surfaces of the central heating element 51, and the upper and lower surfaces of the lower heating element 52, respectively. That is, the fins 53 are stacked on the upper heating element 50, the central heating element 51, and the lower heating element 52.

  A plate material 55 extending in the left-right direction is disposed between the two fins 53, 53 disposed between the upper heating element 50 and the central heating element 51. The fins 53 are in contact with the upper surface and the lower surface of the plate material 55, respectively. A similar plate material 55 is also disposed between two fins 53, 53 disposed between the central heating element 51 and the lower heating element 52.

  The spring 54 is disposed on the upper surface of the fin 53 positioned at the upper end portion of the electric heater 5. The spring 54 is for applying a biasing force so as to compress the heating elements 50 to 52 and the fins 53 held in the frame-type frame 60 in the stacking direction. As shown in FIG. 7, the spring 54 includes a substrate portion 54 a extending in the left-right direction along the upper surface of the fin 53, and an elastic deformation portion 54 b extending from an edge portion of the substrate portion 54 a on the downstream side in the flow direction of air-conditioning air. Provided, and the whole is made of an elastic metal material. The elastic deformation portion 54b extends upward from the substrate portion 54a and extends upstream in the flow direction of the air-conditioning air, and then has a distal end bent and extended downward. This elastic deformation part 54b is elastically deformed downward.

  As shown in FIG. 3, the frame frame 60 includes an upstream member 70 disposed on the upstream side in the air-conditioning air flow direction and a downstream member 80 disposed on the downstream side. The side member 70 and the downstream side member 80 are combined. The upstream member 70 and the downstream member 80 are made of parts that are point-symmetric with respect to each other. The center of symmetry is a point P (shown in FIG. 4) located at the center of the upstream member 70 when the frame-type frame 60 is viewed from the air-conditioning air flow direction. The point P is located at the center in the up-down direction and the center in the left-right direction of the upstream member 70. The upstream member 70 and the downstream member 80 are point-symmetric with respect to each other. In this embodiment, the upstream member 70 and the downstream member 80 are injection-molded by a mold (not shown) having the same molding surface shape. Accordingly, the upstream side member 70 and the downstream side member 80 have the same shape and are common parts. Therefore, if there are two parts, the frame type frame 60 can be arranged regardless of which part is arranged on the upstream side. Can be configured.

  Specifically, the upstream member 70 includes an upper side portion (first side portion) 71 and a lower side portion (second side portion) 72 that are located on both sides of the heating elements 50 to 52 and the fins 53 in the stacking direction, and an upper side portion. 71 has a plurality of rod-shaped portions (connecting portions) 74A to 74C and 75A to 75C that extend from the lower side portion 72 to connect the upper side portion 71 and the lower side portion 72. The upper side portion 71, the lower side portion 72, and the rod-shaped portion 74C and 75C form a substantially rectangular frame shape. The upper side portion 71, the lower side portion 72, and the rod-like portions 74A to 74C and 75A to 75C are integrally formed of a resin material.

  The upper side portion 71 extends in the left-right direction. As shown in FIG. 7, the elastic deformation portion 54 b of the spring 54 is in contact with the lower surface of the upper side portion 71. As shown in FIG. 3 and FIG. 4, projections 71 a are provided at the right end and the left end of the upper side 71 so as to protrude upstream in the air-conditioning air flow direction. In addition, a vertical plate portion 71 b that protrudes downward is provided at the right end portion and the left end portion of the upper side portion 71, respectively. A fin 53 at the upper end is arranged between the left and right vertical plate portions 71b and 71b. Further, the upper side 71 is provided with an engaging claw (not shown) that protrudes downstream. Furthermore, as shown in FIG. 6, a recess 71 h is formed on the surface of the upper side 71 on the downstream side in the air-conditioning air flow direction.

  As shown in FIG. 4, the lower side portion 72 is substantially parallel to the upper side portion 71. The dimension of the lower side 72 in the air-conditioning air flow direction is set shorter than the dimension of the upper side 71 in the same direction. The lower surface of the fin 53 at the lower end is in contact with the upper surface of the lower side portion 72. On the right end and the left end of the lower side 72, there are provided protrusions 72a that protrude upstream in the air-conditioning air flow direction. Further, a vertical plate portion 72b that protrudes upward is provided at the right end portion and the left end portion of the lower side portion 72, respectively. A fin 53 at the lower end is arranged between the left and right vertical plate portions 72b, 72b. A notch 72 c is formed on the lower surface of the lower side 72. Further, as shown in FIG. 6, a convex portion 72 f is formed on the surface of the lower side portion 72 on the downstream side in the air-conditioning air flow direction.

  As shown in FIG. 4, the upper side 71 and the lower side 72 are connected by rod-like parts 74 </ b> A to 74 </ b> C and 75 </ b> A to 75 </ b> C so that the interval is kept constant. Between the upper side portion 71 and the lower side portion 72, the heating elements 50 to 52, the fins 53, the springs 54, and the plate material 55 are accommodated and compressed in the stacking direction.

  The rod-shaped parts 74A to 74C and 75A to 75C are arranged with a gap in the longitudinal direction of the upper side part 71 and the lower side part 72. That is, the first right rod-shaped portion 74A is disposed on the right side of the central portion of the upstream member 70, the second right rod-shaped portion 74B is disposed on the right side of the first right rod-shaped portion 74A, and the second A third right rod portion 74C is disposed on the right side of the right rod portion 74B. A first left bar 75A is disposed on the left side of the central portion of the upstream member 70, and a second left bar 75B is disposed on the left side of the first left bar 75A. A third left bar-like part 75C is arranged on the left side of the left bar-like part 75B.

  The first to third right rod portions 74A to 74C and the first to third left rod portions 75A to 75C are disposed upstream of the heating elements 50 to 52, the fins 53, and the springs 54 in the air flow direction. Yes. The first to third right rod portions 74A to 74C and the first to third left rod portions 75A to 75C support the heating elements 50 to 52, the fins 53, and the springs 54 from the upstream side.

  The thicknesses of the first to third right rod portions 74A to 74C and the first to third left rod portions 75A to 75C are set smaller than the thicknesses of the upper side portion 71 and the lower side portion 72, and the first to third right side portions The degree to which the rod-like portions 74A to 74C and the first to third left-side rod-like portions 75A to 75C hinder the flow of air for air conditioning is reduced.

  74 A of 1st right side bar-shaped parts are inclined and extended with respect to the upper side part 71 and the lower side part 72 so that it may be located on the right side, so that it goes to the upper side. Further, the second right rod-like portion 74B is inclined so as to be positioned on the left side as it goes upward. Further, the third right rod portion 74C is inclined so as to be positioned on the right side as it goes upward.

  75 A of 1st left side rod-like parts are inclined and extended with respect to the upper side part 71 and the lower side part 72 so that it may be located on the left side, so that it goes to the upper side. Further, the second left rod-like portion 75B is inclined so as to be positioned on the right side as it goes upward. Further, the third left rod-like portion 75C is inclined so as to be positioned on the left side as it goes upward.

  The distance between the upper end of the first right rod 74A and the upper end of the first left rod 75A is Y1, and the distance between the lower end of the first left rod 75A and the lower end of the second left rod 75B is Y1. The dimension is Y2, the distance between the lower end portion of the first right rod portion 74A and the lower end portion of the second right rod portion 74B is Y3, the upper end portion of the second right rod portion 74B, and the upper end of the third right rod portion 74C. The separation dimension Y2 is set to be equal to Y4, and the separation dimension between the upper end part of the second left bar part 75B and the upper end part of the third left bar part 75C is set to Y5. Also, the separation dimension Y4 and the separation dimension Y5 are set equal. The separation dimension Y1 is set to the shortest, the separation dimensions Y2 and Y3 are set wider than the separation dimension Y1, and the separation dimensions Y4 and Y5 are set wider than the separation dimensions Y2 and Y3. Thereby, when comparing the distance between the upper ends of the adjacent rod-shaped portions 74A and 75A, the distance between the upper ends of the adjacent rod-shaped portions 74B and 74C, and the distance between the upper ends of the adjacent rod-shaped portions 75B and 75C, The distance between the upper ends of the rod-like parts 74B and 74C and the distance between the upper ends of the rod-like parts 75B and 75C located closer to the end than the distance between the upper ends of the rod-like parts 74A and 75A located at the longitudinal center of the lower side part 72. Is wider.

  Further, as shown in FIG. 3, the downstream member 80 is the same as the upstream member 70 as described above, and includes an upper side portion 81, a lower side portion 82, first to third right side rod-like portions 84A to 84C, and 1st-3rd left side bar-shaped part 85A-85C is provided. Similar to the upstream member 70, the upper side portion 81 is provided with a vertical plate portion 81 b and the lower side portion 82 is provided with a vertical plate portion 82 b. As shown in FIG. 6, a convex portion 81 f that fits into the concave portion 71 h of the upper side portion 71 of the upstream member 70 is formed on the upstream side surface of the upper side portion 81 in the air-conditioning air flow direction. Furthermore, a concave portion 82h into which the convex portion 72f of the lower side portion 72 of the upstream member 70 is fitted is formed on the upstream side surface of the lower side portion 82 in the air-conditioning air flow direction.

  As shown in FIG. 3, the downstream side member 80 is provided with first to third right side bar-like parts 84 </ b> A to 84 </ b> C and first to third left side bar-like parts 85 </ b> A to 85 </ b> C. 84 A of 1st right side rod-shaped parts are inclined and extended with respect to the upper side part 81 and the lower side part 82 so that it may be located on the left side, so that it goes to the upper side. Further, the second right rod-like portion 84B is inclined so as to be positioned on the right side as it goes upward. Further, the third right rod-shaped portion 84C is inclined so as to be positioned on the left side as it goes upward.

  85 A of 1st left side bar-shaped parts are inclined and extended with respect to the upper side part 81 and the lower side part 82 so that it may be located on the right side, so that it goes to the upper side. The second left bar 85B is inclined so as to be positioned on the left side as it goes upward. Further, the third left bar 85C is inclined so as to be positioned on the right side as it goes upward. That is, the first to third right rod portions 84A to 84C on the downstream side and the first to third left rod portions 85A to 85C on the downstream side correspond to the first to third right rod portions 74A to 74C on the upstream side and the first corresponding to the first to third left rod portions 85A to 85C, respectively. It inclines in the opposite direction to the 1st-3rd left side rod-shaped part 75A-75C. This is because the downstream member 80 is point-symmetric with the upstream member 70.

  When viewed in the air-conditioning air flow direction, the upper side 71 of the upstream member 70 and the upper side 81 of the downstream member 80 overlap, and the lower side 72 of the upstream member 70 and the lower side 82 of the downstream member 80 Overlap. The engaging claw provided on the upper side portion 71 of the upstream side member 70 engages with the peripheral edge portion of the notch portion 81 c provided on the upper side portion 81 of the downstream side member 80, and the lower side portion 82 of the downstream side member 80. The engaging claw 82 c provided on the upper side member 70 engages with the peripheral edge portion of the notch portion 72 c provided on the lower side portion 72 of the upstream member 70. Thereby, the upstream member 70 and the downstream member 80 are integrated. At this time, as shown in FIGS. 6 and 7, the surface on the downstream side in the flow direction of the air-conditioning air in the upper side portion 71 of the upstream member 70 and the upstream surface in the upper side portion 81 of the downstream member 80 are in contact with each other. In addition, the downstream side surface of the upstream side member 70 in the flow direction of the air-conditioning air is in contact with the upstream side surface of the lower side portion 82 of the downstream member 80. The convex portion 81 f of the upper side portion 81 of the downstream side member 80 is fitted into the concave portion 71 h of the upper side portion 71 of the upstream side member 70, and the convex portion 72 f of the lower side portion 72 of the upstream side member 70 is connected to the downstream side member 80. It fits into the recess 82 h of the lower side 82.

  As shown in FIG. 5, when viewed in the air-conditioning air flow direction, the upstream intermediate portion of the upstream first right rod-shaped portion 74A and the vertical intermediate portion of the downstream first right rod-shaped portion 84A Are arranged to overlap. Further, the intermediate portion in the vertical direction of the second right rod portion 74B on the upstream side and the intermediate portion in the vertical direction of the second right rod portion 84B on the downstream side are arranged so as to overlap each other. Further, the intermediate portion in the vertical direction of the upstream third right rod portion 74C and the intermediate portion in the vertical direction of the downstream third right rod portion 84C are arranged so as to overlap each other.

  Furthermore, when viewed in the air-conditioning air flow direction, the intermediate portion in the vertical direction of the first left-side rod portion 75A on the upstream side and the intermediate portion in the vertical direction of the first left-side rod portion 85A on the downstream side are overlapped. The Further, the intermediate portion in the vertical direction of the second left bar portion 75B on the upstream side and the intermediate portion in the vertical direction of the second left rod portion 85B on the downstream side are arranged so as to overlap each other. Further, the intermediate portion in the vertical direction of the third left bar portion 75C on the upstream side and the intermediate portion in the vertical direction of the third left rod portion 85C on the downstream side are arranged so as to overlap each other.

  As shown in FIG. 2, on the right side of the frame frame 60, a right cap member 61 that covers the right end portions of the upper side portions 71 and 81 and the lower side portions 72 and 82 is provided. The right cap member 61 is detachably attached to the frame type frame 60 by being fitted to the right end portions of the upper side portions 71 and 81 and the lower side portions 72 and 82. As shown also in FIG. 3, the fitting cylinder part 61a which fits in the state by which the right end part of the upper side parts 71 and 81 and the lower side parts 72 and 82 was inserted is provided in the left side of the right side cap member 61. . An engagement hole 61d for engaging the projections 71a and 72a of the frame-type frame 60 is formed in the peripheral wall portion of the fitting cylinder portion 61a. A flange 61b is formed on the right side of the fitting cylinder portion 61a. Furthermore, an electrode plate insertion cylinder portion 61c is provided on the flange 61b so as to protrude rightward. The electrode plates 50a, 51a, and 52b are disposed inside the electrode plate insertion cylinder portion 61c through the flange 61b while being inserted into the fitting cylinder portion 61a. Although not shown, power supply wiring extending from the vehicle side is connected to the electrode plates 50a, 51a, 52b.

  On the left side of the frame 60, a left cap member 62 that covers the left ends of the upper side portions 71 and 81 and the lower side portions 72 and 82 is provided. The left cap member 62 is detachably attached to the frame frame 60 by being fitted to the left end portions of the upper side portions 71 and 81 and the lower side portions 72 and 82. The right cap member 61 is provided with a fitting cylinder portion 61a that fits in a state in which the left end portions of the upper side portions 71 and 81 and the lower side portions 72 and 82 are inserted. On the peripheral wall portion of the fitting cylinder portion 61a, an engagement hole 62c is formed in which the projections 71a and 72a of the frame-type frame 60 are engaged.

  Next, an assembling procedure of the electric heater 5 configured as described above will be described. First, the upper heating element 50, the central heating element 51, the lower heating element 52, the fins 53, and the plate material 55 are stacked and accommodated in the upstream member 70. The spring 54 is inserted between the upper surface of the fin 53 at the upper end portion and the lower surface of the upper side portion 71 while being elastically deformed. Thereby, a compressive force acts on the upper heating element 50, the central heating element 51, the lower heating element 52, the fins 53, and the plate material 55. Thereafter, when the downstream member 80 is assembled and integrated with the upstream member 70, the upper heating element 50, the central heating element 51, the lower heating element 52, the fins 53, the plate material 55, and the spring 54 are placed inside the frame frame 60. Be contained. The upper heating element 50, the central heating element 51, the lower heating element 52, the fins 53, and the plate material 55 are stacked and accommodated in the downstream member 80, and then the upstream member 70 is assembled to the downstream member 80. It may be integrated.

  Next, the case where the electric heater 5 obtained as described above is used will be described. The repulsive force by the spring 54 acts to open the upper side 71 and the lower side 72 with respect to the upper side 71 and the lower side 72 of the upstream member 70 of the frame frame 60. Similarly, the repulsive force of the spring 54 acts to open the upper side 81 and the lower side 82 with respect to the upper side 81 and the lower side 82 of the downstream member 80 of the frame-type frame 60. At this time, since the upper side 71 and the lower side 72 of the upstream member 70 are connected by a plurality of 74A to 74C and 75A to 75C, the upper side 71 and the lower side 72 are opposed to the repulsive force of the spring 54. Is prevented from opening. Similarly, the opening of the upper side 81 and the lower side 82 of the downstream member 80 is also suppressed.

  As described above, according to the electric heater 5 according to the first embodiment, the upstream member 70 and the downstream member 80 can have the same shape. Therefore, the mold for molding the upstream member 70 and the mold for molding the downstream member 80 can be made the same to reduce the types of molds and the types of components. Furthermore, since the upstream member 70 and the downstream member 80 have the same shape, if the same parts are assembled at the assembly site, the frame-type frame 70 is obtained, and the occurrence of erroneous assembly can be suppressed.

  Moreover, since the upstream member 60 and the downstream member 70 are injection-molded by a mold having the same molding surface shape, the same molding surface shape is used when the upstream member 60 and the downstream member 70 are injection-molded. If the mold which has is prepared, it will be sufficient and equipment cost can be reduced.

  Further, when viewed in the flow direction of the air-conditioning air, the first left-side bar portion 75A on the upstream side and the first left-side bar portion 85A on the downstream side intersect in an X shape, and the second left-side bar portion on the upstream side 75B and the downstream second left bar 85B intersect in an X shape, and the upstream third left rod 75C and the downstream third left bar 85C intersect in an X shape. As a result, the strength of the frame frame 60 is increased, and the deformation suppressing effect of the frame frame 60 can be further improved.

In the first embodiment, the number of the rod-like portions of the upstream member 70 and the downstream member 80 is six. However, the number is not limited to this, and may be five or less, or may be seven or more. .
(Embodiment 2)
8 and 9 show an electric heater 5 according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment only in the number and shape of the rod-shaped portions of the upstream member 70 and the number and shape of the rod-shaped portions of the downstream member 80, and the other portions are implemented. Since the configuration is the same as that of the first embodiment, the same portions as those of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different portions are described.

  As shown in FIG. 8, the upstream member 70 is provided with a central rod-like portion 73. The central rod-shaped portion 73 is disposed at the central portion in the longitudinal direction of the upstream member 70. The central rod-like portion 73 extends perpendicular to the upper side portion 71 and the lower side portion 72. Further, the first to third right side rod-like portions 74 </ b> A to 74 </ b> C and the first to third left side rod-like portions 75 </ b> A to 75 </ b> C are parallel to the central rod-like portion 73.

  The center line of the central rod 73 is X1, the center line of the first right rod 74A is X2, the center line of the second right rod 74B is X3, the center line of the third right rod 74C is X4, and the first left rod When the center line of the portion 75A is X5, the center line of the second left rod-like portion 75B is X6, and the center line of the third left rod-like portion 75C is X7, the distance A1 between the center line X1 and the center line X2 and the center The separation dimension A2 between the line X1 and the center line X5 is set equal, and the separation dimension B1 between the center line X2 and the center line X3 is set equal to the separation dimension B2 between the center line X5 and the center line X6. The separation dimension C1 between the center line X3 and the center line X4 and the separation dimension C2 between the center line X6 and the center line X7 are set to be equal. The separation dimensions C1 and C2 are set wider than the separation dimensions B1 and B2, and the separation dimensions B1 and B2 are set wider than the separation dimensions A1 and A2. That is, the interval between the adjacent rod-like portions 74B and 74C and the interval between the rod-like portions 75B and 75C are the widest, and the interval between the adjacent rod-like portions 73 and 74A and the interval between the rod-like portions 73 and 75A are the narrowest. And the space | interval of adjacent rod-shaped part 74A, 74B and the space | interval of rod-shaped part 75A, 75B are narrower than the space | interval of rod-shaped part 74B, 74C, and are wider than the space | interval of rod-shaped part 73, 74A. Thereby, when the interval between the adjacent rod-shaped portions 73 and 74A, the interval between the adjacent rod-shaped portions 74A and 74B, and the interval between the adjacent rod-shaped portions 74B and 74C are compared, the upper side portion 71 and the lower side portion 72 are centered in the longitudinal direction. The interval between the rod-like portions 74B and 74C (75B and 75C) located on the end side of the upper side portion 71 and the lower side portion 72 is larger than the interval between the located rod-like portions 73 and 74A.

  As shown in FIG. 9, the central bar 83 is provided on the downstream member 80 as well as the upstream member 70. The first to third right side rod-like portions 84A to 84C and the first to third left side rod-like portions 85A to 85C of the downstream side member 80 are the first to third right side rod-like portions 74A to 74C and the first to third left side rod-like portions 74A to 85C of the upstream side member 70, respectively. It arrange | positions similarly to the 3rd left side rod-shaped part 75A-75C, and is extended similarly.

  Further, in the state in which the upstream member 70 and the downstream member 80 are integrated, when viewed in the air-conditioning air flow direction, the central rod-like portion 73 and the first to third right-hand rod portions 74A to 74A of the upstream member 70. 74C and the 1st-3rd left side bar-shaped part 75A-75C, the center bar-shaped part 83 of the downstream member 80, the 1st-3rd right side bar-shaped part 84A-84C, and the 1st-3rd left side bar-shaped part 85A-85C. Each overlaps.

  Therefore, according to the electric heater 5 according to the second embodiment, similar to the first embodiment, the upstream side member 60 and the downstream side member 70 constituting the frame-type frame 60 are made common so that the type of the mold can be changed. It is possible to reduce the number of parts, and it is possible to suppress the occurrence of incorrect assembly.

  In the second embodiment, the number of the rod-like portions of the upstream side member 70 and the downstream side member 80 is seven, but is not limited thereto, and may be six or less, or may be eight or more. . Further, the number of rod-like portions of the upstream member 70 and the downstream member 80 may be the same or different.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the electric heater of the vehicle air conditioner according to the present invention can be used, for example, when heating air for air conditioning.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 5 Electric heater 50-52 Heat generating body 53 Fin 54 Spring (biasing member)
60 Frame type frame 61 Right side cap member 62 Left side cap member 71 Upper side part (first side part)
72 Lower side (second side)
73 Center bar (joint part)
74A-74C 1st-3rd right side rod-shaped part (connection part)
75A-75C 1st-3rd left-hand side bar-shaped part (joint part)
84A-84C 1st-3rd right side rod-shaped part (connection part)
85A-85C 1st-3rd left-hand side bar-shaped part (joint part)

Claims (4)

A heating element that generates heat by supplying power;
Fins disposed in a stacked state on the heating element;
A frame-type frame that houses the heating element and the fins and holds the fins in a stacked state;
In the electric heater of the vehicle air conditioner in which the air-conditioning air blown into the frame-type frame is heated through the fins,
The frame-type frame is configured by combining an upstream member disposed on the upstream side of the air-conditioning air flow direction and a downstream member disposed on the downstream side,
The upstream side member includes a first side and a second side located on both sides in the stacking direction of the heating element and the fin, and a longitudinal direction of the second side from a longitudinal middle of the first side. It has a plurality of connecting portions extending to the middle portion and connecting the first side portion and the second side portion, and both end portions in the longitudinal direction of the first side portion and the second side portion are not mutually Cap members that are connected and cover both ends in the longitudinal direction of the first side and the second side are provided,
The downstream member includes a first side and a second side located on both sides of the heating element and the fin in the stacking direction, and a downstream side from a longitudinal intermediate portion of the first side of the downstream member. A plurality of connecting portions connecting the first side and the second side, the first side of the downstream member, and the second side of the member; Both end portions in the longitudinal direction of the second side portion are not connected to each other, and both end portions in the longitudinal direction of the first side portion and the second side portion of the downstream side member are respectively covered by the cap member. I,
The upstream member and the downstream member are made of parts that are point-symmetric with respect to a point that is located at the center of the upstream member when the frame-type frame is viewed from the air-conditioning air flow direction. An electric heater for a vehicle air conditioner. In the electric heater of the vehicle air conditioner according to claim 1,
The electric heater for a vehicle air conditioner, wherein the upstream member and the downstream member are injection-molded by a mold having the same molding surface shape. In the electric heater of the vehicle air conditioner according to claim 1 or 2,
The electric heater includes an urging member for applying an urging force so as to compress the heating element and the fin held in the frame-type frame in the stacking direction ,
Connecting portions of the upstream member extends inclined relative to the first side portion and the second side portion of the upstream-side member,
The electric heater for a vehicle air conditioner characterized in that the connecting portion of the downstream member extends while being inclined in a direction opposite to the connecting portion of the upstream member. In the electric heater of the vehicle air conditioner according to claim 3,
The connecting part of the downstream member is arranged so that at least a part of the connecting part of the upstream member overlaps with the connecting part of the upstream member when viewed in the flow direction of the air conditioning air. heater.

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