WO2021162069A1 - Dispositif de chauffage de milieu caloporteur et dispositif de climatisation de véhicule - Google Patents

Dispositif de chauffage de milieu caloporteur et dispositif de climatisation de véhicule Download PDF

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Publication number
WO2021162069A1
WO2021162069A1 PCT/JP2021/005145 JP2021005145W WO2021162069A1 WO 2021162069 A1 WO2021162069 A1 WO 2021162069A1 JP 2021005145 W JP2021005145 W JP 2021005145W WO 2021162069 A1 WO2021162069 A1 WO 2021162069A1
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WIPO (PCT)
Prior art keywords
heating element
recess
heat medium
electrode
heating device
Prior art date
Application number
PCT/JP2021/005145
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English (en)
Japanese (ja)
Inventor
足立　知康
Original Assignee
三菱重工サーマルシステムズ株式会社
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Application filed by 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Publication of WO2021162069A1 publication Critical patent/WO2021162069A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • 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
    • 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic

Definitions

  • the present disclosure relates to a heat medium heating device and a vehicle air conditioner.
  • a positive characteristic thermistor element is used as a heat generating element as one of the heat medium heating devices for heating a heated medium which is a heat source for heating in a vehicle air conditioner applied to an electric vehicle or a hybrid vehicle.
  • a PTC heater is known (for example, Patent Document 1).
  • the PTC heater has a positive thermistor characteristic, and the resistance value rises as the temperature rises, thereby controlling the current consumption and slowing the temperature rise, and then the current consumption and the temperature of the heat generating part. Reaches the saturation region and stabilizes, and has self-temperature control characteristics.
  • Patent Document 1 describes an electric heating device having a heating element arranged in a recess provided in a housing.
  • the outside of the heating element is formed of ceramic plates, and the PTC heating element is arranged between these ceramic plates.
  • a contact plate made of a conductive material is arranged between these PTC heating elements and a ceramic plate, and an extension portion is integrally formed on these contact plates. Extensions of the contact plates facing each other are arranged on both sides in the diagonal direction. Therefore, the extensions are not only separated from each other by the thickness of the PTC heating element, but also substantially separated from each other by the width of the heating element.
  • contact plates for guiding electricity to the PTC heating element are arranged on both sides of the PTC heating element.
  • the distance between the contact plates arranged on either surface and the recesses becomes relatively short. Therefore, for example, when the concave portion (housing forming the concave portion) is formed of a conductive member, the insulation distance between the contact plate and the concave portion becomes short, so that there is a possibility of electric leakage from the contact plate to the concave portion. there were.
  • the present disclosure has been made in view of such circumstances, and provides a heat medium heating device and a vehicle air conditioner capable of improving insulation and suppressing electric leakage from an electrode portion.
  • the purpose is.
  • the heat medium heating device has a plate-shaped heating element and a recess for accommodating the heating element so that the plate surface and the side wall surface of the heating element face each other.
  • a heat radiating part that radiates heat to a heat medium and a pair of electrode parts fixed to the heating element are provided, and the heating element is unidirectional with reference to a central axis extending along the depth direction of the recess.
  • a pair of electrode portions are fixed to the plate surface of the heating element which is arranged on the side and is close to the central axis.
  • the insulating property can be improved and the electric leakage from the electrode portion can be suppressed.
  • FIG. 5 is a cross-sectional view showing a cross section taken along the line VV of FIG.
  • FIG. 5 is an enlarged cross-sectional view of a main part of FIG.
  • FIG. 5 is a perspective view which shows the heating apparatus provided in the heat medium heating apparatus of FIG.
  • FIG. 5 is a perspective view which shows the heating apparatus provided in the heat medium heating apparatus of FIG.
  • FIG. 5 is a top view which shows the heating apparatus provided in the heat medium heating apparatus of FIG.
  • the vehicle air conditioner 1 is a casing 3 that forms an air flow path 2 for taking in outside air or vehicle interior air, adjusting the temperature, and blowing it out into the vehicle interior. It has.
  • a blower 4 that sucks outside air or vehicle interior air in sequence from the upstream side to the downstream side of the air flow path 2 to boost the pressure and pumps it to the downstream side, and air pumped by the blower 4.
  • a cooler 5 that cools the flow
  • a radiator 6 that flows through the cooler 5 and heats the cooled air flow
  • an air flow rate that flows through the radiator 6 and air that flows by bypassing the radiator 6.
  • An air mix damper 7 for adjusting the ratio with the flow rate and adjusting the temperature of the air flow mixed on the downstream side thereof is installed.
  • the cooler 5 constitutes a refrigerant circuit together with a compressor, a condenser, and an expansion valve (not shown), and cools the air flowing thereby by evaporating the refrigerant adiabatically expanded by the expansion valve.
  • the radiator 6 constitutes a heat medium circulation circuit 11 together with a tank 8, a pump 9, and a heat medium heating device 10, and a heat medium (for example, water) heated by the heat medium heating device 10 is circulated via the pump 9. By doing so, the air circulating there is heated.
  • the longitudinal direction of the heat medium heating device 10 is the X-axis direction
  • the lateral direction of the heat medium heating device 10 is the Y-axis direction
  • the X-axis direction and the direction orthogonal to the Y-axis direction are the Z-axis.
  • the Z-axis direction may be referred to as the vertical direction.
  • the term "longitudinal direction” means the longitudinal direction of the heat medium heating device 10
  • the term “short direction” means the short direction of the heat medium heating device 10.
  • the heat medium heating device 10 is a device for heating a heat medium (for example, water).
  • the heat medium heating device 10 includes a first casing 20 in which various devices such as a control substrate 23 and a heating device 40 are housed, and a second casing 30 provided below the first casing 20 and through which a heat medium flows.
  • the heating device 40 for heating the heat medium is provided.
  • the first casing 20 integrally integrates a control board accommodating portion 21 in which the control substrate 23 is accommodated and a heat radiating portion 22 projecting downward from the bottom surface of the control substrate accommodating portion 21. Be prepared for.
  • the first casing 20 is a die-cast product integrally molded by die-casting using a metal material having high thermal conductivity such as an aluminum alloy.
  • the control board accommodating portion 21 is a box-shaped body with an open upper part, and a space for accommodating the control substrate 23 is formed inside. Further, a high-voltage connector 24 to which a high-voltage power cable (not shown) is connected is provided at one end of the control board accommodating portion 21 in the longitudinal direction (X-axis direction). Further, a low-voltage connector 25 to which a low-voltage power cable (not shown) is connected is provided at the other end of the control board accommodating portion 21 in the longitudinal direction. An opening extending in the longitudinal direction is formed on the bottom surface of the control board accommodating portion 21. The opening communicates with the recess 26 of the heat radiating portion 22, which will be described later.
  • the control board accommodating portion 21 may be closed above by providing a lid (not shown) or the like.
  • the control board 23 is for controlling the energization of the PTC heater (heating element) described later, and is fixedly installed in the control board accommodating portion 21 via a screw or the like.
  • the control board 23 is electrically connected to a high-voltage power cable (not shown) connected to the high-voltage connector 24 and a low-voltage cable (not shown) connected to the low-voltage connector 25. Further, the control board 23 is electrically connected to the PTC heater via an electrode plate 42 (electrode portion) described later.
  • the heat radiating portion 22 projects downward from the substantially central region of the bottom surface of the control board accommodating portion 21 in the lateral direction.
  • the heat radiating portion 22 integrally includes a recess 26 that is recessed downward from the bottom surface of the control board accommodating portion 21, and a plurality of heat radiating fins 27 that project substantially horizontally from the outer peripheral surface.
  • the recess 26 extends in the longitudinal direction of the heat medium heating device 10. As shown in FIG. 4, the recess 26 is provided with three partition walls 28 that divide the space inside the recess 26 in the longitudinal direction. That is, the recess 26 is divided into four by the partition wall 28. In the following description, the term "recess 26" simply means a divided recess 26.
  • the heating device 40 is housed in the space formed inside each recess 26. Note that, in FIG. 4, the control board 23 is omitted for the sake of illustration.
  • the recess 26 includes an inlet opening 26a that communicates with the internal space of the control board accommodating portion 21, and a side wall surface 26b that defines both ends of the space formed inside the recess 26 in the lateral direction. It has a bottom surface 26c that defines the lower end of the space formed inside the recess 26.
  • the first casing 20 is a die-cast product
  • a draft is formed on the side wall surface 26b of the recess 26. That is, the side wall surface 26b is inclined so as to form a predetermined angle with respect to the vertical surface. Specifically, each side wall surface 26b is inclined so that the side wall surfaces 26b come closer to each other from the entrance opening 26a toward the bottom surface 26c.
  • Each heat radiation fin 27 has a plate shape extending in the horizontal direction, and is formed over substantially the entire length direction.
  • the plurality of heat radiation fins 27 are arranged side by side at predetermined intervals in the vertical direction (Z-axis direction).
  • the second casing 30 integrally includes a flow path portion 31 that forms a flow path through which the heat medium flows, and a flange portion 32 that is fixed to the first casing 20. Further, as shown in FIGS. 2 and 3, the second casing 30 integrally integrates an inlet portion 33 for supplying the heat medium to the flow path portion 31 and an outlet portion 34 for discharging the heat medium from the flow path portion 31. Prepared for.
  • the flow path portion 31 extends in the longitudinal direction (X-axis direction). Inside the flow path portion 31, a flow path formed so as to be recessed downward is provided. The flow path extends in the longitudinal direction, and the heat medium flows through the flow path. Further, a heat radiating unit 22 is arranged in the flow path. The heat radiating portion 22 is arranged so as not to come into contact with the flow path portion 31. That is, the heat medium circulates in the space between the flow path portion 31 and the heat radiating portion 22. The heat medium is heated by exchanging heat with the heat radiating unit 22.
  • the flange portion 32 extends in the lateral direction from the upper end of the flow path portion 31.
  • the control board accommodating portion 21 of the second casing 30 is placed on the upper surface of the flange portion 32.
  • the flange portion 32 and the control board accommodating portion 21 are fixed.
  • An inlet portion 33 is provided at one end of the flow path portion 31 in the longitudinal direction (X-axis direction).
  • the inlet portion 33 is a cylindrical member.
  • a heat medium circulates inside the inlet 33.
  • the upper end of the inlet portion 33 is connected to the lower end of the flow path portion 31.
  • the heat medium flows into the flow path through the inlet 33.
  • An outlet portion 34 is provided at the other end of the flow path portion 31 in the longitudinal direction (X-axis direction).
  • the outlet portion 34 is a cylindrical member.
  • a heat medium circulates inside the outlet portion 34.
  • the upper end of the outlet portion 34 is connected to the lower end of the flow path portion 31. The heat medium that has passed through the flow path and has completed heat exchange is discharged to the outside of the heat medium heating device 10 via the outlet portion 34.
  • the heating device 40 is housed in the recess 26 of the heat radiating unit 22.
  • the resin frame 47 of the heating device 40 is omitted.
  • the heating device 40 includes a flat plate-shaped PTC element (heating element) 41, a pair of electrode plates (electrode portions) 42 fixed to the plate surface of the PTC element 41, and a PTC element.
  • the first insulator 43 and the second insulator 44 fixed to the plate surface of 41, the spacer 45 fixed to the first insulator 43, the leaf spring 46 fixed to the spacer 45, and the PTC element 41 are fixed. It is provided with a resin frame 47 and a resin frame 47.
  • the resin frame 47 is omitted for the sake of illustration. Further, in FIG. 12, only the PTC element 41 and the electrode plate 42 constituting the heating device 40 are shown.
  • the PTC element 41 is a member having a substantially quadrangular outer shape and a flat plate shape (see also FIG. 12). That is, the PTC element 41 has a plate surface on one side (hereinafter, referred to as "one surface 41a") and a plate surface on the other side (hereinafter, referred to as "other surface 41b"). Further, the PTC element 41 has a side surface 41c that connects one surface 41a and the other surface 41b.
  • high-voltage power supplied via the control board 23 is applied via the electrode plate 42.
  • the PTC element 41 is controlled on and off via a control board 23 and is configured to generate heat.
  • the pair of electrode plates 42 are fixed to one surface 41a of the PTC element 41. That is, each of the electrode plates 42 constituting the pair of electrode plates 42 is fixed to both ends of the PTC element 41 in the X-axis direction. Further, each electrode plate 42 is fixed to the same plate surface of the PTC element 41 (see also FIG. 12). That is, one of the pair of electrode plates 42 is provided at one end of one surface 41a of the PTC element 41, and the other of the pair of electrode plates 42 is provided at the other end of one surface 41a of the PTC element 41. Has been done.
  • Each electrode plate 42 is a plate-shaped member made of a conductive metal material. As shown in FIG. 12, each electrode plate 42 integrally has a fixing portion 42a fixed to one surface 41a of the PTC element 41 and a connecting portion 42b protruding upward from the fixing portion 42a.
  • the fixing portion 42a is in surface contact with one surface 41a of the PTC element 41.
  • the fixing portion 42a and the PTC element 41 are in surface contact with each other at the end portion of the PTC element 41 in the X-axis direction over substantially the entire area of the PTC element 41 in the Z-axis direction.
  • the fixing portion 42a and the PTC element 41 are fixed with a conductive adhesive at the contact portion.
  • the connecting portion 42b extends upward from the upper end of the fixing portion 42a.
  • the length of the connecting portion 42b in the X-axis direction is longer than the length of the fixing portion 42a in the X-axis direction.
  • the upper end of the connecting portion 42b is located above the inlet opening 26a of the recess 26 of the heat radiating portion 22. Further, the upper end of the connecting portion 42b penetrates the control board 23 located above the recess 26. At this penetration point, the connecting portion 42b and the control board 23 are electrically connected.
  • the first insulator 43 is a plate-shaped member made of a material having an insulating property (for example, aluminum oxide). As shown in FIGS. 9 and 11, the first insulator 43 has an element fixing portion 43a fixed to the PTC element 41 and an electrode fixing portion extending in the X-axis direction from both ends of the fixing portion 42a in the X-axis direction. It has a portion 43b integrally. That is, the element fixing portions 43a are provided in the central region of the first insulator 43 in the X-axis direction, and the electrode fixing portions 43b are provided at both ends of the first insulator 43 in the X-axis direction. The vertical length of the first insulator 43 is longer than the vertical length of the PTC element 41.
  • the element fixing portion 43a is formed so as to project from the electrode fixing portion 43b toward the PTC element 41 side.
  • the element fixing portion 43a is in surface contact with one surface 41a of the PTC element 41. Specifically, it is in contact with the central region of one surface 41a of the PTC element 41. Specifically, of the one surface 41a of the PTC element 41, the pair of electrode plates 42 are in contact with substantially the entire area where they are not fixed.
  • the first insulator 43 and the PTC element 41 are fixed with an adhesive having an insulating property at a contact portion.
  • the electrode fixing portion 43b is in surface contact with the fixing portion 42a of each electrode plate 42. Specifically, it is in surface contact with the surface of the electrode plate 42 that is not fixed to the PTC element 41.
  • the first insulator 43 and the electrode plate 42 are fixed with an adhesive having an insulating property at a contact portion.
  • the electrode fixing portion 43b is formed so as to be recessed from the element fixing portion 43a.
  • the length of the electrode fixing portion 43b in the X-axis direction is longer than the length of the electrode fixing portion 43b in the Y-axis direction.
  • the element fixing portion 43a On the surface of the first insulator 43 on the PTC element 41 side, the element fixing portion 43a is located on the PTC element 41 side by a predetermined distance from the electrode fixing portion 43b. This predetermined distance is substantially the same as or slightly longer than the thickness of the electrode plate 42.
  • the surface of the first insulator 43 opposite to the PTC element 41 side (hereinafter, referred to as “one surface”) is a flat surface over the entire area.
  • the second insulator 44 is made of an insulating material (for example, aluminum oxide) like the first insulator 43.
  • the second insulator 44 is a flat plate-shaped member.
  • the second insulator 44 is in surface contact with substantially the entire other surface 41b of the PTC element 41.
  • the second insulator 44 and the PTC element 41 are fixed with an adhesive having an insulating property at a contact portion.
  • the vertical length of the second insulator 44 is longer than the vertical length of the PTC element 41.
  • the spacer 45 is made of an insulating metal material (for example, an aluminum alloy). As shown in FIG. 10, the spacer 45 is a plate-shaped member formed so that the length in the Y-axis direction becomes shorter from the upper end to the lower end.
  • the spacer 45 has a substantially trapezoidal shape in a cross section cut at a surface intersecting the X-axis direction. As shown in FIG. 10, the spacer 45 is in surface contact with each other over substantially the entire surface of one surface of the first insulator 43.
  • the spacer 45 and the first insulator 43 are fixed with an adhesive having an insulating property at a contact portion.
  • facing surface 45a faces the side wall surface 26b of the recess 26.
  • the facing surface 45a is formed so that the angle formed by the facing surface 45a and the side wall surface 26b is smaller than the angle formed by the one surface 41a of the PTC element 41 and the side wall surface 26b of the recess 26. In other words, the facing surface is closer to parallel than the one surface 41a of the PTC element 41 with reference to the side wall surface 26b of the recess 26.
  • the spacer 45 is arranged so that the facing surface 45a is separated from the side wall surface 26b.
  • the leaf spring 46 is made of a metal material (for example, an aluminum alloy).
  • the leaf spring 46 is fixed to the facing surface of the spacer 45.
  • the leaf spring 46 has a main body portion 46a fixed to the spacer 45 and a plurality of plate-shaped spring portions 46b protruding from the main body portion 46a (six in this embodiment as an example).
  • the main body 46a is a plate-shaped member having a constant thickness, and is in surface contact with the facing surface of the spacer 45.
  • the leaf spring 46 and the spacer 45 are fixed with an adhesive having an insulating property at the contact portion.
  • the tip of the spring portion 46b is in contact with the side wall surface 26b of the recess 26.
  • the leaf spring 46 urges the spacer 45 toward the PTC element 41.
  • the leaf spring 46 urges the PTC element 41 or the like via the spacer 45 toward one direction (see FIG. 5) of the recess 26.
  • the resin frame 47 is made of an insulating resin.
  • the resin frame 47 is a rectangular frame-shaped member.
  • the resin frame 47 has a frame body portion 47a that forms a space inside, and a support portion 47b that extends from the frame body portion 47a in the Y-axis direction.
  • the PTC element 41 is arranged on the inner circumference of the frame body portion 47a. That is, the PTC element 41 is arranged in the space formed inside the frame body portion 47a.
  • the support portion 47b is arranged on the side surface of the first insulator 43, the second insulator 44, and the spacer 45.
  • the first insulator 43 and the second insulator 44 are fixed to the inner peripheral portion of the frame body portion 47a with an insulating adhesive.
  • the entire circumference of the first insulator 43 and the second insulator 44 is fixed to the frame body portion 47a.
  • the entire circumference of the first insulator 43 and the second insulator 44 may not be fixed to the frame portion 47a.
  • the upper surfaces of the first insulator 43 and the second insulator 44 may not be fixed to the frame portion 47a.
  • the heating device 40 As shown in FIG. 5, in the heating device 40, one surface 41a and the other surface 41b of the PTC element 41 are housed in the recess 26 so as to face the side wall surface 26b of the recess 26. Further, the heating device 40 is arranged in the recess 26 so as to be closer to one direction with respect to the central axis C extending along the depth direction (Z-axis direction) of the recess 26. Specifically, the heating device 40 is arranged so as to be in contact with the side wall surface 26b on the one-way side of the recess 26 and away from the side wall surface 26b on the other direction side of the recess 26 (see FIG. 6). By arranging the heating device 40 in this way, the PTC element 41 is arranged so that the one surface 41a to which the electrode plate 42 is fixed is closer to the central axis than the other surface 41b.
  • the separation distance between the heating device 40 and the recess 26 becomes wider toward the lower side. That is, the distance between the main body portion 46a of the leaf spring 46 and the side wall surface 26b of the recess 26 is larger than the distance (L1 in FIG. 6) of the recess 26 on the inlet opening 26a side (upper side in this embodiment) of the recess 26. The distance (L2 in FIG. 6) on the bottom surface 26c side (lower side in this embodiment) is longer.
  • the plate thickness of the main body portion 46a is constant, so in other words, the distance between the facing surface 45a of the spacer 45 and the side wall surface 26b of the recess 26 is greater than the distance between the inlet opening 26a side of the recess 26 and the bottom surface of the recess 26.
  • the 26c side is longer.
  • a potting agent (filler) 48 is filled between the heating device 40 and the side wall surface 26b of the recess 26. Specifically, the potting agent 48 is filled between the leaf spring 46 and the side wall surface 26b.
  • the potting agent 48 is, for example, a silicone-based resin material having a higher thermal conductivity than air.
  • the silicone-based resin material is an example, and other materials may be used as the potting agent 48.
  • a material that is a low-viscosity liquid at room temperature and becomes an elastic body having a predetermined elasticity by heating is used.
  • a silicone rubber whose curing method is classified as two-component addition can be used.
  • the potting agent 48 may be filled by accommodating the heating device 40 in the recess 26 and then injecting the potting agent 48 between the heating device 40 and the recess 26. Further, the potting agent 48 may be filled by injecting the filler into the recess 26 and then accommodating the heating device 40 in the recess 26.
  • grease may be applied to the surface in contact with the recess 26 (the plate surface of the second insulator 44). By applying grease, the friction between the heating device 40 and the recess 26 is reduced, and the heating device 40 can be easily accommodated in the recess 26. Further, the potting agent 48 is heated after filling to become an elastic body.
  • the main body 46a of the leaf spring 46 of the heating device 40 and the recess 26 are separated from each other. As a result, when the heating device 40 is housed in the recess 26, the load acting on the PTC element 41 from the recess 26 is suppressed. Therefore, damage to the PTC element 41 can be suppressed.
  • a potting agent 48 having a higher thermal conductivity than air is filled between the heating device 40 and the side wall surface 26b of the recess 26.
  • the potting agent 48 is filled between the heating device 40 and the side wall surface 26b of the recess 26. Further, the potting agent 48 is heated after filling to form an elastic body.
  • an elastic body is provided between the heating device 40 and the recess 26. For example, when the heating device 40 and the recess 26 are in contact with each other on substantially the entire surface of non-elastic solids, thermal stress may occur and the heating device 40 may be damaged.
  • an elastic body is provided between the heating device 40 and the recess 26. Therefore, damage to the heating device 40 can be suppressed.
  • the spacer 45 has a facing surface 45a facing the side wall surface 26b, and is formed so that the angle formed by the facing surface 45a and the side wall surface 26b is smaller than the angle formed by the plate surface and the side wall surface 26b.
  • the facing surface 45a of the spacer 45 is closer to parallel than the plate surface of the PTC element 41 with reference to the side wall surface 26b of the recess 26. Therefore, the distance between the facing surface 45a and the side wall surface 26b is made uniform in the depth direction (Z-axis direction) of the recess 26.
  • the thickness (length in the Y-axis direction) of the filler filled between the facing surface 45a and the side wall surface 26b is also made uniform. Therefore, the amount of heat transferred from the PTC element 41 to the heat radiating portion 22 can be made uniform in the depth direction of the recess 26.
  • the heating device 40 is arranged closer to one direction in the recess 26 by the leaf spring 46.
  • the distance between the heating device 40 and the side wall surface 26b of the recess 26 can be increased as compared with the case where the heating device 40 is arranged at the center of the recess 26. Therefore, the potting agent 48 can be easily filled.
  • the PTC element 41, the electrode plate 42, the first insulator 43, the second insulator 44, and the spacer 45 are fixed with an adhesive. Further, the first insulator 43 and the second insulator 44 are fixed to the resin frame 47. As a result, the PTC element 41, the spacer 45, and the resin frame 47 can be easily accommodated in the recess 26 as compared with the case where the PTC element 41, the spacer 45, and the resin frame 47 are not integrated. Further, the PTC element 41 is surrounded by a resin frame 47 formed of an insulating member. As a result, the electrode plate 42 and the heat radiating portion 22 can be insulated by the resin frame 47.
  • the insulating property can be improved and the electric leakage from the electrode plate 42 can be suppressed. Further, the entire circumference of the first insulator 43 and the second insulator 44 is fixed to the resin frame 47 with an insulating adhesive. As a result, it is possible to prevent the potting agent 48 from adhering to the side surface 41c of the PTC element 41, and the potting agent 48 having a low heat resistant temperature can be used.
  • both of the pair of electrode plates 42 are fixed to one surface 41a, which is the plate surface of the PTC element 41 on the side closer to the central axis C.
  • the electrode plate 42 can be provided at a position close to the central axis C of the recess 26.
  • the electrode plate 42 can be provided at a position far from the side wall surface 26b of the recess 26. Therefore, the insulation distance between the electrode plate 42 and the heat radiating portion 22 can be increased as compared with the case where the electrode plate 42 is fixed to the plate surface (other surface 41b) far from the central axis C. Therefore, the insulating property can be improved and the electric leakage from the electrode plate 42 can be suppressed.
  • the central axis C means a line passing through the center of the recess 26 when viewed in the YZ plane.
  • the electrode plate 42 is arranged at one end of one surface 41a of the PTC element 41 and the other end of the PTC element 41. As a result, the distance between the electrode plates 42 can be increased. That is, the insulation distance between the electrode plates 42 can be increased. Thereby, the withstand voltage can be improved.
  • one electrode of the pair of electrode plates 42 is provided on one surface 41a of the PTC element 41, the other electrode plate 42 is provided on the other surface 41b of the PTC element 41, and one electrode plate 42 and the other electrode plate 42 are provided. It is also conceivable to provide and at positions that are both ends when the plate surface is viewed in a plan view. That is, it is conceivable that one electrode plate 42 and the other electrode plate 42 are provided so as to be diagonal to the PTC element 41 with the PTC element 41 interposed therebetween. In this embodiment, the conductor is conducted by a pair of electrode plates 42 provided at both ends of one surface 41a of the PTC element 41.
  • the insulation distance between one electrode plate 42 and the other electrode plate 42 becomes long, so that the withstand voltage can be improved.
  • the electrode plates 42 may not conduct with each other and the PTC element 41 may not generate heat.
  • damage to the PTC element 41 is suppressed, so that both improvement in electric resistance and improvement in reliability of the PTC element 41 can be achieved at the same time.
  • the distance between the facing surface 45a of the spacer 45 and the side wall surface 26b of the recess 26 is longer on the bottom surface 26c side of the recess 26 than on the inlet opening 26a side of the recess 26.
  • the potting agent 48 can be preferably filled. Even when the heating device 40 is housed in the recess 26 and then filled with the potting agent 48, or when the potting agent 48 is injected into the recess 26 and then the heating device 40 is housed in the recess 26. , Air can be suitably discharged from the inlet opening 26a. Therefore, the potting agent 48 can be suitably filled.
  • the first insulator 43 and the second insulator 44 are provided between the electrode plate 42 and the side wall surface 26b of the recess 26.
  • the electrode plate 42 and the heat radiating portion 22 can be insulated by the first insulator 43 and the second insulator 44. Therefore, it is possible to suppress electric leakage from the electrode plate 42.
  • the PTC element 41 and the electrode plate 42 are fixed with an adhesive.
  • electricity can be suitably applied between the electrode and the PTC element 41.
  • the first insulator 43, the electrode plate 42, and the PTC element 41 are fixed with an insulating adhesive.
  • the electrode plate 42 or the PTC element 41 and the insulator can be fixed with an adhesive. Therefore, a short circuit between the electrode plates 42 can be suppressed.
  • the PTC element 41, the electrode plate 42, the first insulator 43, the second insulator 44, and the spacer 45 constituting the heating device 40 are fixed with an adhesive. This makes it possible to eliminate air between the members. Therefore, since the thermal resistance between the members is reduced, heat can be suitably transferred from the PTC element 41 to the heat radiating unit 22.
  • the present disclosure is not limited to the above embodiment, and can be appropriately modified without departing from the gist thereof.
  • a pair of electrode plates 42 are provided on one surface 41a of the PTC element 41
  • the present disclosure is not limited to this.
  • one of the pair of electrode plates 42 is provided on one side surface 41c of the PTC element 41 in the X-axis direction
  • the other of the pair of electrode plates 42 is provided on the other side surface 41c of the PTC element 41 in the X-axis direction. It may be provided.
  • the insulation distance between the electrode plate 42 and the heat radiating portion 22 is longer than in the case where the electrode plate 42 is fixed to the plate surface (other surface 41b) far from the central axis C. Can be done. Therefore, the insulating property can be improved and the electric leakage from the electrode plate 42 can be suppressed.
  • the heating device 40 may be configured by omitting the leaf spring 46.
  • the heating device 40 when the heating device 40 is housed in the recess 26, it is housed so as to be closer to one direction of the recess 26.
  • the insulation distance between the electrode plate 42 and the heat radiating portion 22 is longer than in the case where the electrode plate 42 is fixed to the plate surface (other surface 41b) far from the central axis C. Can be done. Therefore, the insulating property can be improved and the electric leakage from the electrode plate 42 can be suppressed.
  • the electrode plate 42 may be fixed to the plate surface of the PTC element 41 opposite to the plate surface on which the spacer 45 is provided. By doing so, the electrode plate 42 can be kept away from the conductive member. Therefore, the insulating property can be improved and the electric leakage from the electrode plate 42 can be suppressed.
  • the heating device 40 may be arranged so that both sides of the heating device 40 are separated from the side wall surface 26b of the recess 26, and the potting agent 48 may be filled on both sides of the heating device 40.
  • the low voltage cable may be a low voltage connector.
  • the high-voltage connector and the low-voltage connector may be provided at the same end in the longitudinal direction.
  • the electrode plate may have the same length in the Y-axis direction of the fixing portion 42a and the electrode fixing portion 43b.
  • the first insulator 43 may be separated at a step position in the Y-axis direction. That is, the flat plate-shaped spacer-side insulator fixed to the spacer 45 and the flat-plate-shaped PTC element-side insulator fixed to the PTC element 41 are configured as separate bodies, and the center of the plate surface of the spacer-side insulator is formed.
  • the plate surface of the insulator on the PTC element side may be fixed to the portion. At that time, the insulator on the spacer side and the insulator on the PTC element side may be fixed with an insulating adhesive.
  • a leaf spring may be provided between the first insulator 43 and the spacer 45.
  • the leaf spring may be fixed to the first insulator 43 with an adhesive having an insulating property.
  • the tip of the spring portion of the leaf spring is in contact with the spacer 45, and the leaf spring urges the first insulator 43 toward the PTC element 41.
  • the potting agent may be filled between the spacer 45 and the leaf spring.
  • a leaf spring may be provided between the second insulator 44 and the side wall surface 26b of the recess 26.
  • the leaf spring may be fixed to the second insulator 44 with an adhesive having an insulating property.
  • the tip of the spring portion of the leaf spring is in contact with the side wall surface 26b of the recess 26.
  • a spacer may be provided between the leaf spring and the side wall surface 26b, and when the spacer is provided, the tip of the spring portion of the leaf spring is in contact with the spacer.
  • the leaf spring urges the second insulator 44 in the direction of the PTC element 41.
  • the potting agent 48 may be filled between the leaf spring 46 and the side wall surface 26b or the spacer.
  • the heating medium heating device accommodates the heating element so that the plate-shaped heating element (41) and the plate surface (41a) and the side wall surface (26b) of the heating element face each other.
  • the heating element is provided with a heat radiating portion (22) that has a recess (26) to dissipate heat from the heating element to a heating medium, and a pair of electrode portions (42) fixed to the heating element.
  • a pair of the electrode portions are fixed to the plate surface of the heating element which is arranged in one direction with reference to the central axis (C) extending along the depth direction of the recess and is closer to the central axis. Has been done.
  • both of the pair of electrode portions are fixed to the plate surface of the heating element on the side closer to the central axis.
  • the electrode portion can be provided at a position close to the central axis of the recess.
  • the electrode portion can be provided at a position far from the side wall surface of the recess. Therefore, for example, even if the heat radiating portion is a conductive member, the insulation distance between the electrode portion and the heat radiating portion can be lengthened as compared with the case where the electrode portion is fixed to the plate surface on the side far from the central axis. can. Therefore, the insulating property can be improved and the electric leakage from the electrode portion can be suppressed.
  • the central axis means a line passing through the center of the recess when viewed on the YZ plane.
  • one of the pair of the electrode portions is provided at one end of the plate surface of the heating element, and the other of the pair of the electrode portions is provided. , Is provided at the other end of the plate surface of the heating element.
  • the electrode portions are arranged at one end of the plate surface of the heating element and the other end. As a result, the distance between the electrode portions can be increased. That is, the distance between the electrode portions can be increased. Thereby, the withstand voltage can be improved.
  • the heating element (41) and the heating element such that the plate surface (41a) and the side wall surface (26b) of the heating element face each other.
  • a heat radiating portion (22) that has a recess (26) for accommodating the heating element and radiates heat of the heating element to a heating medium, and a pair of electrode portions (42) fixed to the heating element.
  • the body is arranged unidirectionally with reference to a central axis extending along the depth direction of the recess, and one of the pair of electrode portions is provided on one side surface (26c) of the heating element.
  • the other side of the pair of electrode portions is provided on the other side surface (26c) of the heating element.
  • the heating element is arranged in one direction with respect to the central axis. That is, the plate surface of the heating element includes a surface on the side close to the central axis and a surface on the side far from the central axis. Further, in the above configuration, both of the pair of electrode portions are fixed to the side surface of the heating element. As a result, the electrode portion can be provided at a position closer to the central axis of the recess as compared with the case where the electrode portion is fixed to the plate surface on the side far from the central axis. In other words, the electrode portion can be provided at a position far from the side wall surface of the recess.
  • the insulation distance between the electrode portion and the heat radiating portion can be lengthened as compared with the case where the electrode portion is fixed to the plate surface on the side far from the central axis. can. Therefore, the insulating property can be improved and the electric leakage from the electrode portion can be suppressed.
  • the electrode portions are arranged on the side surface of the plate surface of the heating element and the side surface on the other side. As a result, the distance between the electrode portions can be increased. That is, the distance between the electrode portions can be increased. Thereby, the withstand voltage can be improved.
  • the heating element and the electrode portion are fixed with a conductive adhesive.
  • the heating element and the electrode are fixed with an adhesive.
  • electricity can be suitably applied between the electrode and the heating element.
  • the heat medium heating device includes an insulator provided between the electrode portion and the side wall surface and fixed to at least one of the electrode portion or the heating element.
  • the electrode portion or the heating element and the insulator are fixed with an insulating adhesive.
  • an insulator is provided between the electrode portion and the side wall surface.
  • the electrode portion and the heat radiating portion can be insulated by an insulator. Therefore, it is possible to suppress electric leakage from the electrode portion.
  • the electrode portion or the heating element and the insulator are fixed with an insulating adhesive. This makes it possible to suppress electric leakage from the electrode portion.
  • an adhesive is provided between the electrode portion or the heating element and the insulator. This makes it possible to eliminate air between the heating element and the electrodes. Therefore, the thermal resistance between the members is reduced. Therefore, heat can be suitably transferred from the heating element to the heat radiating portion via the insulator.
  • the vehicle air conditioner includes the heat medium heating device (10), the air flow path (2), and the outside air or the vehicle interior air in the air flow path according to any one of the above.
  • a vehicle air conditioner including a blower (4) for circulation, a cooler (5) provided on the downstream side of the blower, and a radiator (6) provided on the downstream side of the cooler.
  • the heat medium heated by the heat medium heating device is configured to be circulatory.
  • Heat medium heating device 11 Heat medium circulation circuit 20: 1st casing 21: Control board accommodating part 22: Heat dissipation part 23: Control board 24: High pressure connector 25: Low pressure connector 26: Recess 26a: Inlet opening 26b: Side wall surface 26c: Bottom surface 27: Heat dissipation fin 28: Partition 30: Second Casing 31: Flow path 32: Flange 33: Inlet 34: Outlet 40: Heating device 41: PTC element (heating element) 41a: One surface 41b: Other surface 41c: Side surface 42: Electrode plate (electrode portion) 42a: Fixing part 42b: Connecting part 43: First insulator 43a: Element fixing part 43b: Electrode fixing part 44: Second insulator 45: Spacer 45a: Facing surface 46: Leaf spring 46a: Main body part 46b: Spring part 47 : Resin frame

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

Abstract

Le but de la présente invention est d'améliorer la qualité d'isolation et d'empêcher une fuite électrique d'une partie d'électrode. Un dispositif de chauffage de milieu caloporteur (10) comprend : un élément PTC en forme de plaque (41) ; une partie de dissipation de chaleur (22) qui présente un évidement (26) stockant l'élément PTC (41) de telle sorte qu'une surface de l'élément PTC (41) et une surface de paroi latérale (26b) se fassent face et qui dissipe la chaleur de l'élément PTC (41) vers un caloporteur ; et une paire de plaques d'électrodes (42) fixées à l'élément PTC (41). L'élément PTC (41) est disposé sur un côté de première direction par rapport à un axe central (C) s'étendant le long d'une direction de profondeur de l'évidement (26). La paire de plaques d'électrode (42) est fixée à une surface de l'élément PTC (41) sur un côté plus proche de l'axe central (C).
PCT/JP2021/005145 2020-02-13 2021-02-12 Dispositif de chauffage de milieu caloporteur et dispositif de climatisation de véhicule WO2021162069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-022282 2020-02-13
JP2020022282A JP2021128850A (ja) 2020-02-13 2020-02-13 熱媒体加熱装置及び車両用空調装置

Publications (1)

Publication Number Publication Date
WO2021162069A1 true WO2021162069A1 (fr) 2021-08-19

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PCT/JP2021/005145 WO2021162069A1 (fr) 2020-02-13 2021-02-12 Dispositif de chauffage de milieu caloporteur et dispositif de climatisation de véhicule

Country Status (2)

Country Link
JP (1) JP2021128850A (fr)
WO (1) WO2021162069A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545987U (ja) * 1991-11-15 1993-06-18 株式会社小糸製作所 面状発熱体
JP2008109137A (ja) * 2006-10-25 2008-05-08 Catem Gmbh & Co Kg 電気加熱装置用の発熱エレメントとその製造方法
JP2009196385A (ja) * 2008-02-19 2009-09-03 Denso Corp 電気ヒータ
JP2018131148A (ja) * 2017-02-17 2018-08-23 三菱重工オートモーティブサーマルシステムズ株式会社 熱媒体加熱装置、及び車両用空調装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545987U (ja) * 1991-11-15 1993-06-18 株式会社小糸製作所 面状発熱体
JP2008109137A (ja) * 2006-10-25 2008-05-08 Catem Gmbh & Co Kg 電気加熱装置用の発熱エレメントとその製造方法
JP2009196385A (ja) * 2008-02-19 2009-09-03 Denso Corp 電気ヒータ
JP2018131148A (ja) * 2017-02-17 2018-08-23 三菱重工オートモーティブサーマルシステムズ株式会社 熱媒体加熱装置、及び車両用空調装置

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