EP3530501B1 - Elektrischer heizer einer klimaanlage für ein fahrzeug - Google Patents

Elektrischer heizer einer klimaanlage für ein fahrzeug Download PDF

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Publication number
EP3530501B1
EP3530501B1 EP17881707.8A EP17881707A EP3530501B1 EP 3530501 B1 EP3530501 B1 EP 3530501B1 EP 17881707 A EP17881707 A EP 17881707A EP 3530501 B1 EP3530501 B1 EP 3530501B1
Authority
EP
European Patent Office
Prior art keywords
air
fins
fin
heating body
electric heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17881707.8A
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English (en)
French (fr)
Other versions
EP3530501A1 (de
EP3530501A4 (de
Inventor
Takehiro Yamamoto
Tatsuya Iwasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Climate Systems Corp
Original Assignee
Japan Climate Systems Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP3530501A1 publication Critical patent/EP3530501A1/de
Publication of EP3530501A4 publication Critical patent/EP3530501A4/de
Application granted granted Critical
Publication of EP3530501B1 publication Critical patent/EP3530501B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0452—Frame constructions
    • F24H3/0476—Means for putting the electric heaters in the frame under strain, e.g. with springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0435—Structures comprising heat spreading elements in the form of fins
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders

Definitions

  • the present invention relates to a structure of an electric heater provided to an air conditioner for a vehicle that is installed in an automobile, for example, and particularly belongs to a technical field for a structure including a fin that transmits heat generated by a heating body supplied with electric power to air to be air-conditioned.
  • an electric heater configured to heat air to be air-conditioned is provided to an air conditioner for a vehicle, for example (see Patent Documents 1 and 2, for example).
  • Such an electric heater includes: PTC elements and fins for dissipating heat that are stacked; and a spring element for compressing the PTC elements and the fins in the stacking direction.
  • the PTC elements, the fins, and the spring element are held by a housing frame in a stacked manner.
  • a plurality of struts are provided that extend from an upper-peripheral portion of the housing frame to a lower-peripheral portion thereof to connect between the upper-peripheral portion and the lower-peripheral portion.
  • the struts extend straight in the vertical direction, and are disposed in an evenly spaced manner in the width direction of the housing frame. Air to be air-conditioned passes through inside of the housing frame, and is heated by heat of the PTC elements while passing through the fins.
  • the housing frame in each of Patent Documents 1 and 2 includes an upper housing and a lower housing that are split into two in the flow direction of outside air.
  • the electric heater in each of Patent Documents 1 and 2 is manufactured, the PTC elements and the fins are stacked to be assembled in advance to the upper housing first in a stacked manner.
  • the spring element is pushed into the upper housing, whereby compression force is applied to the PTC elements and the fins in the stacking direction.
  • Patent Document 3 discloses a structure of an electric heater provided in a vehicle air conditioner mounted on, for example, an automobile.
  • Patent Document 4 discloses a heater structure used in an air conditioner for automobiles.
  • Patent Document 5 discloses a heat sink attached to a semiconductor device or a cooling unit of an air conditioner, and a method for manufacturing the heat sink.
  • Patent Document 6 discloses an electric heater provided in an air conditioner.
  • Patent document 3 discloses an electric heater according to the preamble of claim 1.
  • the fins are compressed by the spring element in the stacking direction, and a fin to which the compression force is applied may deform in a direction in which the distance between adjacent crests of the fin, that is, the fin pitch thereof deviates from its design value because the fin is formed of a thin sheet.
  • the fin pitch deviates from the design value, the airflow resistance deteriorates, which causes the heating performance of the electric heater to decrease.
  • a structure is considered in which a plate member for connecting adjacent crests is soldered to the fin so as to keep the fin pitch from deviating even when compression force of the spring element is applied to the fin.
  • the number of components increases, whereby the cost is increased, and also the dimensional tolerance of the fin in the height direction is increased. Consequently, it may be difficult to set the compression force of the spring element within an appropriate range.
  • the present invention has been made in view of the foregoing, and it is an object thereof to keep the fin pitch from deviating while keeping the cost from increasing, and to increase the heating performance of the electric heater.
  • an engagement portion configured to engage with crests of a fin is formed.
  • a first aspect of the present invention is directed to an electric heater of an air conditioner for a vehicle.
  • the electric heater includes: a heating body configured to generate heat when being supplied with electric power; corrugated fins arranged in a manner stacked on the heating body; a spring member configured to apply compression force to the heating body and the fins in a stacking direction; and a holding frame configured to accommodate and hold the heating body, the fins, and the spring member in a stacked manner. Air to be air-conditioned blown into the holding frame is heated when passing through the fins.
  • a fin of the fins is disposed so as to be positioned in an end portion of the electric heater in the stacking direction.
  • On the holding frame a frame engagement portion configured to engage with crests of the fin disposed in the end portion in the stacking direction is formed.
  • the holding frame has a contact surface with which the fin disposed in the end portion in the stacking direction is brought into contact, and the frame engagement portion is a projection protruding from the contact surface and disposed between adjacent crests of the fin.
  • the projection formed on the contact surface, with which the fin is brought into contact, of the holding frame is disposed between the adjacent crests of the fin, and thus the crests are still less likely to be displaced, and the airflow resistance can be kept appropriate.
  • a second aspect of the present invention is an embodiment of the invention.
  • an insulating plate is interposed between the fins stacked in the stacking direction, and a plate engagement portion configured to engage with crests of each fin is formed on the insulating plate.
  • the plate engagement portion formed on the insulating plate disposed between the fins engages with the crests of each fin, and thus the crests of the fin are less likely to be displaced.
  • a third aspect of the present invention is an embodiment of the second aspect.
  • the plate engagement portion is a projection protruding from the insulating plate and disposed between adjacent crests of each fin.
  • the projection formed on the insulating plate is disposed between the adjacent crests of the fin, and thus the crests are still less likely to be displaced, and the airflow resistance can be kept appropriate.
  • a fourth aspect of the present invention is directed to an electric heater of an air conditioner for a vehicle.
  • the electric heater includes: a heating body configured to generate heat when being supplied with electric power; corrugated fins arranged in a manner stacked on the heating body; a spring member configured to apply compression force to the heating body and the fins in a stacking direction; an insulating plate interposed between the fins stacked in the stacking direction; and a holding frame configured to accommodate and hold the heating body, the fins, the spring member, and the insulating plate in a stacked manner. Air to be air-conditioned blown into the holding frame is heated when passing through the fins. On the insulating plate, a plate engagement portion configured to engage crests of each fin is formed.
  • the frame engagement portion formed on the holding frame is engaged with crests of the corresponding fin, and thus it is possible to keep the fin pitch from deviating while keeping the cost from increasing, and to increase the heating performance of the electric heater.
  • the projection formed on the contact surface, with which the corresponding fin is brought into contact, of the holding frame is disposed between adjacent crests of the fin, and thus the crests are less likely to be displaced.
  • the plate engagement portion configured to engage with crests of each fin is formed, and thus the pitch of a fin positioned in an intermediate portion of the electric heater in the stacking direction can be kept from deviating.
  • the projection formed on the insulating plate is disposed between adjacent crests of the corresponding fin, and thus the crests are still less likely to be displaced.
  • the plate engagement portion configured to engage with crests of each fin is formed, and thus it is possible to keep the fin pitch from deviating while keeping the cost from increasing, and to increase the heating performance of the electric heater.
  • FIG. 1 is a diagram illustrating an electric heater 1 in an air conditioner for a vehicle according to a first embodiment of the present invention.
  • This electric heater 1 is a heater arranged inside the air conditioner for a vehicle (not depicted) and configured to heat air to be air-conditioned introduced from outside of a vehicle cabin or inside of the vehicle cabin into the air conditioner for a vehicle.
  • the air conditioner for a vehicle is installed inside an instrument panel (not depicted) in a vehicle cabin of an automobile, for example, so as to be able to adjust the temperature of air to be air-conditioned to supply the air to various areas in the vehicle cabin.
  • the air conditioner for a vehicle includes a casing, a blower fan, a cooling heat exchanger, and the electric heater.
  • the blower fan and the cooling heat exchanger are accommodated in the casing.
  • the blower fan is a component configured to send air to be air-conditioned.
  • the cooling heat exchanger is a component configured to cool the air to be air-conditioned.
  • the electric heater 1 is a component disposed in an area in the casing downstream of the cooling heat exchanger in the flow direction of air to be air-conditioned, and configured to heat the air to be air-conditioned.
  • an air mix damper is arranged in the casing.
  • the air mix damper is a component configured to change the amount of air passing through the electric heater 1 thereby changing the temperature of air-conditioned air.
  • airflow mode dampers including a defroster-mode damper, a ventilation-mode damper, and a heat-mode damper are arranged.
  • the defroster damper is a component configured to change the amount of air-conditioned air to be blown toward an inner surface of a windshield (not depicted)
  • the vent damper is a component configured to change the amount of air-conditioned air to be blown toward the upper body of a passenger
  • the heat damper is a component configured to change the amount of air-conditioned air to be blown toward the vicinity of feet of the passenger.
  • the structure of the air conditioner for a vehicle is not limited to the above-described structure.
  • the electric heater 1 includes an upper heating body 50, a central first heating body 51, a central second heating body 52, a lower heating body 53, a plurality of fins 54, an upper spring member (one-side spring member) 55, and a holding frame 60, and has a rectangular shape that is laterally long as a whole when viewed from the flow direction of air to be air-conditioned.
  • the upper heating body 50, the central first heating body 51, the central second heating body 52, and the lower heating body 53 have the same structure including a plurality of PTC elements (not depicted) configured to generate heat when being supplied with electric power from a battery (not depicted), for example, mounted on the vehicle, and having a plate-like shape that is laterally long.
  • the PTC elements are disposed so as to be laterally aligned.
  • the upstream side and the downstream side in the flow direction of air to be air-conditioned are defined as depicted in FIG. 4 .
  • the air to be air-conditioned may be allowed to flow in the direction opposite to that of this definition.
  • the left side and the right side of the electric heater 1 are defined as depicted in the respective drawings, and may correspond to the left side and the right side of the vehicle, but do not have to correspond thereto.
  • the upper side and the lower side of the electric heater 1 are defined as depicted in the respective drawings, and may correspond to the upper side and the lower side of the vehicle, but do not have to correspond thereto.
  • the upper heating body 50 is disposed in an upper portion of the electric heater 1.
  • electrode plates 50a to be connected to the corresponding PTC elements are provided so as to protrude rightward.
  • the central first heating body 51 is disposed in a vertically central portion of the electric heater 1 closer to the upper side thereof.
  • electrode plates 51a to be connected to the corresponding PTC elements are provided so as to protrude rightward.
  • the central second heating body 52 is disposed in a vertically central portion of the electric heater 1 closer to the lower side thereof.
  • the lower heating body 53 is disposed in a lower portion of the electric heater 1. On the right end of the lower heating body 53, electrode plates 53a to be connected to the corresponding PTC elements are provided so as to protrude rightward.
  • Each fin 54 is a corrugated fin that has the shape of waves and is continuous and long laterally.
  • the member forming the fin 54 is a thin sheet made of aluminium alloy, for example.
  • the fins 54 are each arranged on upper and lower surfaces of the upper heating body 50, upper and lower surfaces of the central first heating body 51, upper and lower surfaces of the central second heating body 52, and upper and lower surfaces of the lower heating body 53. In other words, the fins 54 are stacked with the upper heating body 50, the central first heating body 51, the central second heating body 52, and the lower heating body 53.
  • a fin 54 is disposed in an end portion of the electric heater in the stacking direction of the heating bodies 50 to 53 and the fins 54, that is, in a lower end portion thereof.
  • each fin 54 is corrugated fins, on upper and lower portions of each fin 54, many crests 54a are formed so as to be laterally spaced apart from each other.
  • a portion between each crest 54a of the upper portion of the fin 54 and the corresponding crest 54a of the lower portion thereof has a flat shape extending substantially in the vertical direction.
  • an upper insulating plate 56 extending laterally is arranged between two fins 54 and 54 arranged between the upper heating body 50 and the central first heating body 51. These respective fins 54 are in contact with upper and lower surfaces of the upper insulating plate 56. Between two fins 54 and 54 arranged between the central first heating body 51 and the central second heating body 52, an intermediate insulating plate 57 extending laterally is arranged. These respective fins 54 are in contact with upper and lower surfaces of the intermediate insulating plate 57. Between two fins 54 and 54 arranged between the central second heating body 52 and the lower heating body 53, a lower insulating plate 58 extending laterally is arranged. These respective fins 54 are in contact with an upper surface and a lower surface of the lower insulating plate 58.
  • the upper insulating plate 56, the intermediate insulating plate 57, and the lower insulating plate 58 are members each formed of resin or other material having electrical insulating properties, for example, and configured to keep the vertically aligned fins 54 and 54 from being electrically connected to each other.
  • the thickness (vertical dimension) of the upper insulating plate 56, the intermediate insulating plate 57, and the lower insulating plate 58 is set smaller than the thickness of the upper heating body 50, the central first heating body 51, the central second heating body 52, and the lower heating body 53.
  • the left ends of the upper insulating plate 56, the intermediate insulating plate 57, and the lower insulating plate 58 protrude more leftward than the left ends of the fins 54.
  • the left ends of the upper insulating plate 56, the intermediate insulating plate 57, and the lower insulating plate 58 protrude more rightward than the left ends of the fins 54.
  • the upper spring member 55 is arranged so as to be adjacent to the upper portion of the fin 54 positioned at the upper end of the electric heater 1, that is, on one side of the electric heater in the stacking direction of the heating bodies 50 to 53 and the fins 54.
  • the upper spring member 55 is a component configured to apply biasing force so as to compress, in the stacking direction, the heating bodies 50 to 53, the insulating plate 56 to 58, and the fins 54 held by the holding frame 60, and the whole thereof is formed of a metal material the whole of which is elastic. As depicted in FIG.
  • the upper spring member 55 has: a base-plate portion 55a extending laterally along the upper portion of the fin 54; an upstream elastically deformable portion 55b extending from a peripheral portion of the base-plate portion 55a on its upstream side in the flow direction of air to be air-conditioned; and a downstream elastically deformable portion 55c extending from a peripheral portion of the base-plate portion 55a on its downstream side in the flow direction of air to be air-conditioned.
  • the upstream elastically deformable portion 55b extends upward from the base-plate portion 55a and extends obliquely toward the downstream side in the flow direction of air to be air-conditioned, and then the tip portion thereof is bent to extend downward.
  • the downstream elastically deformable portion 55c extends from the base-plate portion 55a and extends obliquely toward the upstream side in the flow direction of air to be air-conditioned, and then the tip portion thereof is bent to extend downward.
  • the upstream elastically deformable portion 55b and the downstream elastically deformable portion 55c are configured to elastically deform downward.
  • the holding frame 60 is a component configured to accommodate and hold the upper heating body 50, the central first heating body 51, the central second heating body 52, the lower heating body 53, the fins 54, the upper spring member 55, the upper insulating plate 56, the intermediate insulating plate 57, and the lower insulating plate 58 in a stacked manner.
  • Most part of a vertically intermediate portion of the holding frame 6 is open, and thus air to be air-conditioned blown into the holding frame 6 is heated when passing through the fins 54.
  • the holding frame 60 has an upstream frame-forming member (second frame-forming member) 70 disposed on the upstream side (one side) of the holding frame in the flow direction of air to be air-conditioned and a downstream frame-forming member (first frame-forming member) 80 disposed on the downstream side (the other side) thereof in the flow direction of air to be air-conditioned, and includes the upstream frame-forming member 70 and the downstream frame-forming member 80 in combination.
  • the upstream frame-forming member 70 and the downstream frame-forming member 80 are each made by injection-molding resin material having electrical insulating properties.
  • the flow direction of air to be air-conditioned may be a direction opposite to the direction depicted in FIG. 4 .
  • the frame-forming member 70 is disposed on the downstream side in the flow direction of air to be air-conditioned
  • the frame-forming member 80 is disposed on the upstream side in the flow direction of air to be air-conditioned.
  • the downstream frame-forming member 80 has a downstream upper-peripheral portion 81 disposed on one side (upper side) of the downstream frame-forming member in the stacking direction of the heating bodies 50 to 53 and the fins 54, a downstream lower-peripheral portion 82 disposed on the other side (lower side) thereof in the stacking direction of the heating bodies 50 to 53 and the fins 54, and a downstream connecting portion 83.
  • the downstream upper-peripheral portion 81 extends laterally.
  • On a surface of the downstream upper-peripheral portion 81 on its upstream side in the flow direction of air to be air-conditioned a plurality of upper holding walls (first holding walls) 81a protruding upstream and extending laterally are formed.
  • the upper holding walls 81a are walls disposed in a manner laterally spaced apart from each other but may be a laterally continuous wall.
  • a lower holding wall (second holding wall) 82a protruding upstream in the flow direction of air to be air-conditioned and extending laterally is formed on the downstream lower-peripheral portion 82.
  • fitting holes 82b that are open to the upstream side in the flow direction of air to be air-conditioned and are laterally long are formed.
  • the heating bodies 50 to 53, the fins 54, the upper spring member 55, and the insulating plates 56 to 58 are disposed between the upper holding wall 81a and the lower holding wall 82a of the downstream frame-forming member 80.
  • the heating bodies 50 to 53, the fins 54, and the insulating plates 56 to 58 are stacked in the order described above.
  • the upper spring member 55 is disposed between the fin 54 positioned uppermost and the downstream upper-peripheral portion 81.
  • the distance between the upper holding wall 81a and the lower holding wall 82a of the downstream frame-forming member 80 is set equal to or larger than the total dimension, in the stacking direction, of the heating bodies 50 to 53, the fins 54, the insulating plates 56 to 58, and the upper spring member 55 that are stacked without external force in the stacking direction being applied thereto.
  • the expression "without external force in the stacking direction being applied thereto" means that the upper spring member 55 is left free and kept from being elastically deformed, and also the heating bodies 50 to 53 and the fins 54 are kept from deforming.
  • the distance between the upper holding wall 81a and the lower holding wall 82a is a distance between the lower surface (inner surface) 81b of the upper holding wall 81a and the upper surface (inner surface) 82c of the lower holding wall 82a.
  • the distance between the lower surface 81b of the upper holding wall 81a and the upper surface 82c of the lower holding wall 82a is smaller by a dimension S.
  • the dimension S may be zero, and only needs to be such a dimension that allows compression force to be kept from acting on the heating bodies 50 to 53, the fins 54, the upper spring member 55, and the insulating plates 56 to 58 in a state in which these members are disposed between the upper holding wall 81a and the lower holding wall 82a. Because manufacturing tolerances are set for the heating bodies 50 to 53, the fins 54, the upper spring member 55, and the insulating plates 56 to 58, the dimension S is preferably set to several millimeters or larger, for example, in consideration of these tolerances.
  • the compression force of the upper spring member 55 can be kept from acting in a state in which these members are disposed between the upper holding wall 81a and the lower holding wall 82a.
  • the upper surface 82c of the downstream lower-peripheral portion 82 of the downstream frame-forming member 80 serves as a contact surface with which a lower portion of the fin 54 disposed in the lower end portion of the electric heater is brought into contact.
  • a plurality of projections 82e that are each disposed between adjacent crests 54a and 54a of the fin 54 are formed in a manner laterally spaced apart from each other at an interval corresponding to the distance between the crests 54a and 54a.
  • Each projection 82e is a frame engagement portion configured to laterally engage with the crests 54a and 54a of the fin 54.
  • Each frame engagement portion may be formed of a protrusion, for example.
  • the downstream connecting portion 83 is a portion having a rod-like shape extending from the upper holding wall 81a to the lower holding wall 82a and connecting between the upper holding wall 81a and the lower holding wall 82a while the above-described distance is being maintained.
  • the downstream connecting portion 83 is positioned on the downstream side in the flow direction of air to be air-conditioned, and holds the heating bodies 50 to 53, the fins 54, the upper spring member 55, and the insulating plates 56 to 58 from the downstream side in the flow direction of air to be air-conditioned.
  • the downstream connecting portion 83 is provided in plurality in a manner laterally spaced apart from each other so that air to be air-conditioned can flow through between the downstream connecting portions 83.
  • Each downstream connecting portion 83 may be a vertically extending member, or may be an obliquely extending member.
  • a plurality of projections 58a protruding downward from the insulating plate 58 and each disposed between adjacent crests 54a and 54a of the fin 54 disposed on the lower side of the insulating plate 58 are formed in a manner laterally spaced apart from each other at an interval corresponding to the distance between the crests 54a and 54a.
  • Each projection 58a of the insulating plate 58 is a plate engagement portion configured to laterally engage with the crests 54a and 54a of the fin 54.
  • the projection 58a of the insulating plate 58 laterally engages with the crests 54a and 54a of the fin 54, whereby the crests 54a can be kept from being laterally displaced when the fin 54 is compressed.
  • a plurality of projections 58b protruding upward from the insulating plate 58 and each disposed between adjacent crests 54a and 54a of the fin 54 disposed on the upper side of the insulating plate 58 are formed in a manner laterally spaced apart from each other at an interval corresponding to the distance between the crests 54a and 54a.
  • Each projection 58b of the insulating plate 58 is a plate engagement portion configured to laterally engage with the crests 54a and 54a of the fin 54.
  • the projection 58b of the insulating plate 58 laterally engages with the crests 54a and 54a of the fin 54, whereby the crests 54a can be kept from being laterally displaced when the fin 54 is compressed.
  • Each plate engagement portion may be formed of a protrusion, for example.
  • plate engagement portions having the same structure as described above may be formed.
  • the upstream frame-forming member 70 has an upstream upper-peripheral portion (first coupling portion) 71 disposed on one side (upper side) of the upstream frame-forming member in the stacking direction of the heating bodies 50 to 53 and the fins 54, an upstream lower-peripheral portion (second coupling portion) 72 disposed on the other side (lower side) thereof in the stacking direction of the heating bodies 50 to 53 and the fins 54, a left connecting portion (other-side connecting portion) 73, a right connecting portion (other-side connecting portion) 74, intermediate connecting portions (other-side connecting portions) 75, and a spring compression portion (one-side spring compression portion) 76.
  • the upstream upper-peripheral portion 71 extends laterally.
  • fitting holes 71a that are open to the downstream side in the flow direction of air to be air-conditioned and are laterally long are formed so as to correspond to the upper holding walls 81a of the downstream frame-forming member 80.
  • the upper holding walls 81a of the downstream frame-forming member 80 are inserted to be fitted, whereby the upstream upper-peripheral portion 71 is coupled to the upper holding wall 81a.
  • coupling-plate portions 72a protruding downstream and extending laterally are formed so as to correspond to the fitting holes 82b of the downstream frame-forming member 80.
  • the coupling-plate portions 72a are inserted to be fitted into the fitting holes 82b of the downstream frame-forming member 80, whereby the upstream lower-peripheral portion 72 is coupled to the lower holding wall 82a.
  • the spring compression portion 76 is positioned on the lower side of the upstream upper-peripheral portion 71 and, as a whole, has a plate-like shape extending laterally.
  • the spring compression portion 76 is a component configured to be inserted into a space between the upper holding walls 81a of the downstream frame-forming member 80 and the upper spring member 55 to elastically deform the upper spring member 55 in the stacking direction of the heating bodies 50 to 53 and the fins 54.
  • the vertical dimension that is a thickness dimension of the spring compression portion 76 is set larger than the dimension S, and is a dimension that enables the upper spring member 55 to be elastically deformed as depicted in FIG. 5 by 1 millimeter or more, for example.
  • the compression force of the upper spring member 55 can be adjusted depending on the thickness dimension of the spring compression portion 76. Specifically, the compression force of the upper spring member 55 is preferably set to the extent that the heating bodies 50 to 53 and the fins 54, for example, are not displaced.
  • a portion of the spring compression portion 76 on its downstream side in the flow direction of air to be air-conditioned is a tip portion toward the insertion direction into the above-described space, and thus the thickness of this tip portion of the spring compression portion 76 is set to be smaller at a position closer to the tip. By this setting, the tip portion of the spring compression portion 76 can be easily inserted into the space.
  • a surface of the spring compression portion 76 closer to the upper spring member 55 that is, a lower surface 76a of the spring compression portion 76 extends laterally.
  • a plurality of projections 76b extending in the insertion direction into the space are formed so as to be laterally spaced apart from each other.
  • the projections 76b are continuous on the lower surface 76a of the spring compression portion 76 from the upstream end to the downstream end thereof in the flow direction of air to be air-conditioned.
  • the projections 76b are formed so as to be brought into contact with the upstream elastically deformable portion 55b and the downstream elastically deformable portion 55c of the upper spring member 55.
  • the sliding area between the spring compression portion 76 and the upper spring member 55 when the spring compression portion is inserted into the above-described space can be reduced, whereby the sliding resistance therebetween can be reduced.
  • the number of the projections 76b is not limited to a particular number.
  • the left connecting portion 73 has a rod-like shape extending from a left portion of the upstream upper-peripheral portion 71 to a left portion of the upstream lower-peripheral portion 72.
  • the right connecting portion 74 has a rod-like shape extending from a right portion of the upstream upper-peripheral portion 71 to a right portion of the upstream lower-peripheral portion 72.
  • Each intermediate connecting portion 75 has a rod-like shape extending from a laterally intermediate portion of the upstream upper-peripheral portion 71 to a laterally intermediate portion of the upstream lower-peripheral portion 72.
  • the left connecting portion 73, the right connecting portion 74, and the intermediate connecting portions 75 are portions connecting between the upstream upper-peripheral portion 71 and the upstream lower-peripheral portion 72 while keeping a predetermined distance therebetween. Furthermore, the left connecting portion 73, the right connecting portion 74, and the intermediate connecting portions 75 are positioned on the upstream side in the flow direction of air to be air-conditioned, and holds the heating bodies 50 to 53, the fins 54, the upper spring member 55, and the insulating plates 56 to 58 from the upstream side in the flow direction of air to be air-conditioned. Among the left connecting portion 73, the right connecting portion 74, and the intermediate connecting portions 75, air to be air-conditioned flows through.
  • the left connecting portion 73, the right connecting portion 74, and the intermediate connecting portions 75 may be portions extending vertically, or may be portions extending obliquely.
  • a left cap member 91 and a right cap member 92 are provided, respectively.
  • the left cap member 91 is formed so as to cover the left ends of the upstream frame-forming member 70 and the downstream frame-forming member 80, and is formed to be fitted onto these left ends.
  • the right cap member 92 is formed so as to cover the right ends of the upstream frame-forming member 70 and the downstream frame-forming member 80, and is formed to be fitted onto these right ends.
  • the upper heating body 50, the central first heating body 51, the central second heating body 52, the lower heating body 53, fins 54, the upper insulating plate 56, the intermediate insulating plate 57, and the lower insulating plate 58 are stacked, and are accommodated in the downstream frame-forming member 80.
  • the heating bodies 50 to 53, the fins 54, and the insulating plates 56 to 58 are stacked in the order described above, and are disposed between the upper holding walls 81a and the lower holding wall 82a of the downstream frame-forming member 80.
  • the upper spring member 55 is then disposed between the fin 54 positioned uppermost and the downstream upper-peripheral portion 81.
  • the distance between the upper holding walls 81a and the lower holding wall 82a of the downstream frame-forming member 80 is kept equal to or larger than the total dimension, in the stacking direction, of the heating bodies 50 to 53, the fins 54, the insulating plates 56 to 58, and the upper spring member 55, and thus compression force of the upper spring member 55 does not act on the heating bodies 50 to 53 and the fins 54. Consequently, even before the upstream frame-forming member 70 is assembled to the downstream frame-forming member 80, the heating bodies 50 to 53 and the fins 54 are less likely to be ejected from the downstream frame-forming member 80, and thus assembling workability is improved.
  • the upper spring member 55 When the spring compression portion 76 is inserted between the upper holding walls 81a and the upper spring member 55, the upper spring member 55 is elastically deformed in the stacking direction of the heating bodies 50 to 53 and the fins 54, whereby the heating bodies 50 to 53, the fins 54, and the insulating plates 56 to 58 are compressed in the stacking direction.
  • backlash between the heating bodies 50 to 53, the fins 54, and the insulating plates 56 to 58 is substantially eliminated.
  • the upstream frame-forming member 70 When the upstream frame-forming member 70 is assembled to the downstream frame-forming member 80, the upper holding walls 81a of the downstream frame-forming member 80 are inserted to be fitted into the fitting holes 71a of the upstream frame-forming member 70, whereby the upstream upper-peripheral portion 71 is coupled to the upper holding wall 81a.
  • the coupling-plate portions 72a of the upstream frame-forming member 70 on its lower side are inserted to be fitted into the fitting holes 82b of the downstream frame-forming member 80, whereby the upstream lower-peripheral portion 72 is coupled to the lower holding wall 82a.
  • the heating bodies 50 to 53, the fins 54, the insulating plates 56 to 58, and the upper spring member 55 are held by the left connecting portion 73, the right connecting portion 74, the intermediate connecting portions 75, and the downstream connecting portions 83 from both sides in the flow direction of air to be air-conditioned.
  • the left cap member 91 and the right cap member 92 are assembled to the holding frame 60.
  • the projections 82e of the downstream lower-peripheral portion 82 of the downstream frame-forming member 80 engage with the crests 54a of the fin 54 disposed in the lower end portion of the electric heater, and thus the crests 54a of the fin 54 are less likely to be displaced.
  • the fin pitch is less likely to deviate from the design value, and thus the airflow resistance can be kept appropriate and the heating performance of the electric heater 1 can be increased.
  • the projections 58a and 58b each configured to engage with crests 54a of the corresponding fin 54 are formed, and thus the pitch of the fins positioned in an intermediate portion of the electric heater in the stacking direction can be kept from deviating.
  • the upper spring member 55 assembled to the downstream frame-forming member 80 can be kept from applying force in the stacking direction to the heating bodies 50 to 53, the fins 54, and the insulating plates 56 to 58.
  • the heating bodies 50 to 53, the fins 54, and the insulating plates 56 to 58 are less likely to be ejected from the downstream frame-forming member 80, and force required at the start of the assembly does not have to be great. Consequently, assembling workability can be improved.
  • the distance between the upper holding walls 81a and the lower holding wall 82a of the downstream frame-forming member 80 is set larger than the total dimension, in the stacking direction, of the heating bodies 50 to 53, the fins 54, the insulating plates 56 to 58, and the upper spring member 55.
  • the projections 76b extending in the insertion direction are formed on the spring compression portion 76 of the upstream frame-forming member 70.
  • the present invention can be applied to an air conditioner installed in an automobile, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)

Claims (4)

  1. Elektrischer Heizer (1) einer Klimaanlage für ein Fahrzeug, wobei der elektrische Heizer (1) Folgendes umfasst:
    einen Heizkörper (50 bis 53), der konfiguriert ist, um Wärme zu erzeugen, wenn er mit elektrischem Strom versorgt wird;
    gewellte Rippen (54), die auf gestapelte Weise auf dem Heizkörper (50 bis 53) angeordnet sind;
    ein Federelement (55), das konfiguriert ist, um eine Druckkraft an den Heizkörper (50 bis 53) und die Rippen (54) in einer Stapelrichtung anzulegen; und
    einen Halterahmen (60), der konfiguriert ist, um den Heizkörper (50 bis 53), die Rippen (54) und das Federelement (55) auf gestapelte Weise aufzunehmen und zu halten,
    wobei
    zu klimatisierende Luft, die in den Halterahmen (60) geblasen wird, erwärmt wird, wenn sie die Rippen (54) durchläuft,
    eine Rippe (54) der Rippen (54) angeordnet ist, um in einem Endabschnitt des elektrischen Heizers (1) in der Stapelrichtung positioniert zu sein,
    der Halterahmen (60) eine Kontaktfläche (82c) aufweist, mit der die Rippe (54), die in dem Endabschnitt in der Stapelrichtung angeordnet ist, in Kontakt gebracht wird,
    auf dem Halterahmen (60) ein Rahmeneingriffsabschnitt (82e), der eine Projektion ist, die aus der Kontaktfläche (82c) hervorsteht, und zwischen angrenzenden Scheiteln (54a) der Rippe (54) angeordnet ist, die in dem Endabschnitt in der Stapelrichtung angeordnet ist, und konfiguriert ist, um in die Scheitel (54a) einzugreifen, gebildet wird, und
    dadurch gekennzeichnet, dass er weiter umfasst
    die Projektion ist in einer Durchlaufrichtung der zu klimatisierenden Luft lang.
  2. Elektrischer Heizer (1) nach Anspruch 1, wobei
    eine Isolierplatte (56 bis 58) zwischen den Rippen (54), die in der Stapelrichtung gestapelt sind, eingesetzt ist, und
    ein Platteneingriffsabschnitt (58a, 58b), der konfiguriert ist, um in die Scheitel (54a) jeder Rippe (54) einzugreifen, an der Isolierplatte (56 bis 58) gebildet ist.
  3. Elektrischer Heizer nach Anspruch 2, wobei
    der Platteneingriffsabschnitt (58a, 58b) eine Projektion ist, die aus der Isolierplatte (56 bis 58) hervorsteht und zwischen angrenzenden Scheiteln (54a) jeder Rippe (54) angeordnet ist.
  4. Elektrischer Heizer (1) einer Klimaanlage für ein Fahrzeug, wobei der elektrische Heizer (1) Folgendes umfasst:
    einen Heizkörper (50 bis 53), der konfiguriert ist, um Wärme zu erzeugen, wenn er mit elektrischem Strom versorgt wird;
    gewellte Rippen (54), die auf gestapelte Weise auf dem Heizkörper (50 bis 53) angeordnet sind;
    ein Federelement (55), das konfiguriert ist, um eine Druckkraft an den Heizkörper (50 bis 53) und die Rippen (54) in einer Stapelrichtung anzulegen;
    eine Isolierplatte (56 bis 58), die zwischen den Rippen (54), die in der Stapelrichtung gestapelt sind, eingesetzt ist; und
    einen Halterahmen (60), der konfiguriert ist, um den Heizkörper (50 bis 53), die Rippen (54), das Federelement (55) und die Isolierplatte (56 bis 58) auf gestapelte Weise aufzunehmen und zu halten,
    wobei
    zu klimatisierende Luft, die in den Halterahmen (60) geblasen wird, erwärmt wird, wenn sie die Rippen (54) durchläuft,
    dadurch gekennzeichnet, dass er weiter umfasst
    auf der Isolierplatte (56 bis 58) ist ein Platteneingriffsabschnitt (58a, 58b), der eine Projektion ist, die aus der Isolierplatte (56 bis 58) hervorsteht, zwischen angrenzenden Scheiteln (54a) der Rippe (54) angeordnet ist, und konfiguriert ist, um in die Scheitel (54a) einzugreifen, gebildet,
    die Projektion ist in einer Durchlaufrichtung der zu klimatisierenden Luft lang.
EP17881707.8A 2016-12-13 2017-11-15 Elektrischer heizer einer klimaanlage für ein fahrzeug Active EP3530501B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016241420A JP6982390B2 (ja) 2016-12-13 2016-12-13 車両用空調装置の電気式ヒータの製造方法
PCT/JP2017/041146 WO2018110193A1 (ja) 2016-12-13 2017-11-15 車両用空調装置の電気式ヒータ

Publications (3)

Publication Number Publication Date
EP3530501A1 EP3530501A1 (de) 2019-08-28
EP3530501A4 EP3530501A4 (de) 2019-10-30
EP3530501B1 true EP3530501B1 (de) 2021-02-17

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JP (1) JP6982390B2 (de)
CN (1) CN109982879A (de)
WO (1) WO2018110193A1 (de)

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FR3104882A1 (fr) * 2019-12-13 2021-06-18 Valeo Systemes Thermiques Dispositif chauffant électrique pour véhicule automobile
CN111649474A (zh) * 2020-06-11 2020-09-11 安徽江淮松芝空调有限公司 一种简易水暖ptc系统

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JPS6133251Y2 (de) * 1980-09-25 1986-09-29
JP2592286Y2 (ja) * 1991-11-20 1999-03-17 株式会社ゼクセル 電気式加熱器
JPH08204074A (ja) * 1995-01-30 1996-08-09 Calsonic Corp ヒートシンク及びその製造方法
TW376171U (en) * 1998-11-24 1999-12-01 Foxconn Prec Components Co Ltd Radiating device
JP2005147502A (ja) * 2003-11-14 2005-06-09 Matsushita Electric Ind Co Ltd 調湿装置
JP2007118779A (ja) * 2005-10-28 2007-05-17 Calsonic Kansei Corp ヒータ構造
EP1839920B1 (de) * 2006-03-31 2013-02-13 Behr GmbH & Co. KG Elektrischer Heizer für eine Heizungs- oder Klimaanlage eines Kraftfahrzeugs
EP2017546B1 (de) * 2007-07-18 2016-04-13 Eberspächer catem GmbH & Co. KG Verfahren zum Herstellen einer elektrischen Heizvorrichtung sowie elektrischer Heizvorrichtungen
JP2010132080A (ja) * 2008-12-03 2010-06-17 Denso Corp ヒータユニット
JP5243941B2 (ja) * 2008-12-17 2013-07-24 ヤンマー株式会社 電動管理機
ITRM20130440A1 (it) * 2013-07-26 2015-01-27 Bitron Spa Dispositivo di riscaldamento, in particolare per il riscaldamento dello abitacolo di una automobile, e metodo di montaggio di detto dispositivo.
JP6425525B2 (ja) * 2014-12-08 2018-11-21 株式会社日本クライメイトシステムズ 車両用空調装置の電気式ヒータ
WO2016139730A1 (ja) * 2015-03-02 2016-09-09 三菱電機株式会社 フィンアンドチューブ型熱交換器及びこれを備えた冷凍サイクル装置

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Publication number Publication date
JP6982390B2 (ja) 2021-12-17
WO2018110193A1 (ja) 2018-06-21
EP3530501A1 (de) 2019-08-28
CN109982879A (zh) 2019-07-05
EP3530501A4 (de) 2019-10-30
JP2018095075A (ja) 2018-06-21

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