WO2014000666A1 - Ensemble chauffant électrique à coefficient de température positif, dispositif chauffant électrique et véhicule électrique - Google Patents

Ensemble chauffant électrique à coefficient de température positif, dispositif chauffant électrique et véhicule électrique Download PDF

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Publication number
WO2014000666A1
WO2014000666A1 PCT/CN2013/078193 CN2013078193W WO2014000666A1 WO 2014000666 A1 WO2014000666 A1 WO 2014000666A1 CN 2013078193 W CN2013078193 W CN 2013078193W WO 2014000666 A1 WO2014000666 A1 WO 2014000666A1
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WO
WIPO (PCT)
Prior art keywords
thermal conductive
electric heating
ptc
heat
plate
Prior art date
Application number
PCT/CN2013/078193
Other languages
English (en)
Inventor
Qing Gong
Xinping Lin
Maolin REN
Xiaofang Li
Mengxiang WU
Shumin Wang
Tianyou DENG
Hongmei QIU
Original Assignee
Shenzhen Byd Auto R&D Company Limited
Byd Company Limited
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
Priority claimed from CN201210215420.2A external-priority patent/CN103517468B/zh
Priority claimed from CN 201220304667 external-priority patent/CN202713643U/zh
Priority claimed from CN 201220339273 external-priority patent/CN202993568U/zh
Priority claimed from CN201210242341.0A external-priority patent/CN103542528B/zh
Application filed by Shenzhen Byd Auto R&D Company Limited, Byd Company Limited filed Critical Shenzhen Byd Auto R&D Company Limited
Publication of WO2014000666A1 publication Critical patent/WO2014000666A1/fr

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Classifications

    • 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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/24—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor being self-supporting
    • 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
    • B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
    • B60H1/2221—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters arrangements of electric heaters for heating an intermediate liquid
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/0072—Special adaptations
    • F24H1/009—Special adaptations for vehicle systems
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/121—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using electric energy supply
    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • F24H9/0021—Sleeves surrounding heating elements or heating pipes, e.g. pipes filled with heat transfer fluid, for guiding heated liquid
    • 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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means
    • F24H9/1827—Positive temperature coefficient [PTC] resistor
    • 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
    • B60H2001/2268—Constructional features
    • B60H2001/2278—Connectors, water supply, housing, mounting brackets
    • 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
    • F24H2250/00—Electrical heat generating means
    • F24H2250/04—Positive or negative temperature coefficients, e.g. PTC, NTC
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H05B2203/023—Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system

Definitions

  • the present disclosure relates to a PTC electric heating assembly, an electric heating device having the PTC electric heating assembly and an electric vehicle having the electric heating device.
  • Air-conditioning and heating system of a conventional fuel vehicle generally uses the waste heat of flue gas or circulating cooling water of the engine as a heating source.
  • a heating source for a hybrid electric vehicle or a pure electric vehicle, there is no sufficient waste heat for heating of the interior of the vehicle.
  • the heat source is also used to defrost and defog. Thus, an auxiliary electric heating device is needed.
  • an electric heating device using a PTC (Positive Temperature Coefficient) heating assembly is proposed.
  • the electric heating device has a casing and at least one PTC heating assembly disposed inside the casing.
  • the conventional electric heating device has a lower thermal efficiency and structure of the conventional electric heating device is complicated structure which is difficult to fix.
  • Embodiments of the present disclosure seek to solve at least one of the problems existing in the prior art to at least some extent.
  • a PTC electric heating assembly comprising a first electrode assembly including a first fixed electrode; a second electrode assembly including a second fixed electrode; a PTC heating module disposed between the first electrode assembly and the second electrode assembly; and an insulating layer disposed on an outer surface of each of the first electrode assembly and the second electrode assembly; wherein an inner surface of at least one of the first fixed electrode and the second fixed electrode facing to the PTC heating module is a vertical surface, an outer surface of the at least one of the first fixed electrode and the second fixed electrode facing to the insulating layer is an inclined surface inclined inwardly from top to bottom.
  • an electric heating device comprising a casing defining a plurality of thermal conductive grooves of which at least one side surface is inclined and a medium circulating cavity hermetically isolated from the thermal conductive grooves, the medium circulating cavity defining a medium inlet and a medium outlet; and a plurality of PTC electric heating assemblies mounted into the thermal conductive grooves respectively, each PTC electric heating assembly is according to the first aspect of the present disclosure.
  • an electric vehicle employing an air conditioning system
  • the air conditioning system includes the electric heating device according to the second aspect of the present disclosure.
  • the PTC electric heating assemblies With the PTC electric heating assembly and the electric heating device according to embodiments of the present disclosure, at least one side surface of the thermal conductive grooves is inclined, the PTC electric heating assemblies is mounted into the thermal conductive grooves. Therefore the PTC electric heating assemblies may be stably positioned in the thermal conductive grooves without other fixed part. The heat generated by the PTC electric heating assembly could be transmitted to the medium in the medium circulating cavity directly via the thermal conductive grooves, the thermal losses may be reduced, and therefore, the heating effect of the electric heating device may be efficient increased. Thus the electric heating device may be better for heating of the interior of the vehicle, defrosting, defogging and heating other component.
  • Fig.l is a perspective view of an electric heating device according to an embodiment of the present disclosure.
  • Fig.2 is a partially exploded view of the electric heating device according to an embodiment of the present disclosure
  • Fig.3 is an exploded view of the electric heating device according to an embodiment of the present disclosure.
  • Fig.4 is a sectional view of a casing and a PTC electric heating assembly according to an embodiment of the present disclosure
  • Fig.5 is a sectional view of the PTC electric heating assembly in Fig.4;
  • Fig.6 is a partial sectional view of the PTC electric heating assembly mounted into a thermal conductive groove of the casing in Fig.5;
  • Fig.7 is an exploded view of a PTC electric heating assembly in Fig.5;
  • Fig.8 is a schematic view of a PTC heating module in Fig.5;
  • Fig.9 is a schematic view of an insulation fixing frame of the PTC heating module in Fig. 8;
  • Fig.10 is a schematic view of a casing of the electric heating device according to an embodiment of the present disclosure;
  • Fig. 11 is an exploded view of a thermal conductive trough and a shell body according to an embodiment of the present disclosure
  • Fig.12 is an exploded view of the casing of the electric heating device according to an embodiment of the present disclosure.
  • Fig.13 is a top view of the casing of the electric heating device according to an embodiment of the present disclosure.
  • relative terms such as “central”, “longitudinal”, “lateral”, “front”, “rear”, “right”, “left”, “inner”, “outer”, “lower”, “upper”, “horizontal”, “vertical”, “above”, “below”, “up”, “top”, “bottom” as well as derivative thereof (e.g., “horizontally”, “downwardly”, “upwardly”, etc.) should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present disclosure be constructed or operated in a particular orientation.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance.
  • characteristics defined by the terms “first” and “second” may indicatively or impliedly comprise one or plurality of the characteristics.
  • term “plurality of means two or more than two, unless there is another certain definition.
  • an electric heating device comprises: a casing 1, a plurality of PTC electric heating assemblies 2 mounted in the casing 1 and a circuit control module 3 mounted above the casing 1.
  • the casing 1 comprises: a heating chamber 11 configured to accommodate the PTC electric heating assemblies 2, a medium circulating cavity 12 configured for containing the medium and allowing the medium circulating therein, a medium inlet 13 communicated with the medium circulating cavity 12 and configured for feeding the medium into the medium circulating cavity 12 and a medium outlet 14 configured for discharging the medium out of the medium circulating cavity 12.
  • the heating chamber 11 comprises a plurality of thermal conductive grooves 160, the PTC electric heating assemblies 2 are mounted into the thermal conductive grooves 160.
  • the medium circulating cavity 12 is hermetically isolated from the thermal conductive grooves 160.
  • the circuit control module 3 is mounted above the casing 1 and connected to the PTC electric heating assemblies 2.
  • the circuit control module 3 comprises an electronic component (for example. IGBT module) configured to control the electric heating device.
  • the electric heating device further comprises an upper cover 5 defining a control cavity; the circuit control module 3 is disposed in the control cavity.
  • the circuit control module 3 comprises a control panel configured for mounting the electronic component (for example: IGBT module).
  • the electronic component is the key part of the circuit control module 3, of which lower temperature safer.
  • the circuit control module 3 may be any common circuit control module in the art, the control panel, the electronic component and the circuit control part may be performed by the technologies in the art.
  • the electric heating device further comprises a heat-insulation module 4 disposed on the casing 1 and located between the PTC electric heating assemblies 2 and the circuit control module 3.
  • the heat-insulation module 4 comprises a thermal conductive rubber plate 41, a heat-insulation foam plate 43 disposed above the thermal conductive rubber plate 41, and a heat- insulation rubber plate 42 disposed between the thermal conductive rubber plate 41 and the heat- insulation foam plate 43.
  • an internal environmental temperature of the electric heating device may be reduced dramatically, and the working environmental temperature may be about 60 °C which is lower than the normal working temperature (about 80 °C) of the electronic component, therefore the circuit control module 3 may be protected effectively.
  • one mainly improvement of the PTC electric heating assembly may be that the PTC electric heating assembly has a different structure from conventional PTC electric heating assembly, the PTC electric heating assembly according to the present disclosure may be stably positioned in the thermal conductive grooves 160 without other pressure elements.
  • a PTC electric heating assembly 2 comprises: a first electrode assembly, a second electrode assembly, a PTC heating module 20 disposed between the first electrode assembly and the second electrode assembly, and an insulating layer 23 disposed on an outer surface of each of the first electrode assembly and the second electrode assembly.
  • the PTC heating module 20 includes at least one PTC heating elements 27.
  • Each of the first electrode assembly and the second electrode assembly includes a contact electrode 21 contacted to the PTC heating module 20 and a fixed electrode 22 disposed between the contact electrode 21 and the insulating layer 23.
  • An inner surface of the fixed electrode 22 of at least one of the first electrode assembly and the second electrode assembly facing to the PTC heating module 20 is a vertical surface
  • an outer surface of the fixed electrode 22 of at least one of the first electrode assembly and the second electrode assembly facing to the insulating layer 23 is an inclined surface inclined inwardly from top to bottom.
  • the inner surface of the fixed electrode 22 of both the first electrode assembly and the second electrode assembly facing to the PTC heating module 20 is the vertical surface
  • an outer surface of the fixed electrode 22 of both the first electrode assembly and the second electrode assembly facing to the insulating layer 23 is the inclined surface inclined inwardly from top to bottom.
  • the PTC electric heating assembly 2 may not adopt any pressure element, instead, the inner surface of the fixed electrode 22 of at least one of the first electrode assembly and the second electrode assembly facing to the PTC heating module 20 is the vertical surface, an outer surface of the fixed electrode 22 of at least one of the first electrode assembly and the second electrode assembly facing to the insulating layer 23 is the inclined surface inclined inwardly from top to bottom, therefore the fixed electrode 22 may be work as a pressure element, thus the space can be saved, the mass can be reduced, and also the fixed electrode 22 can be served as a fixed element.
  • the heat generated by the PTC electric heating assembly 2 can be transmitted to the medium in the medium circulating cavity directly via the thermal conductive grooves 160 without through an extra pressure element, thus the thermal losses may be reduced.
  • two side surfaces of the thermal conductive grooves 160 are inclined, correspondingly, the fixed electrodes 22 of the first electrode assembly and the second electrode assembly are inclined inwardly so as to adapt to the inclined side surface of the thermal conductive grooves 160. Therefore the PTC electric heating assembly 2 may be embedded in the thermal conductive grooves 160 conveniently, and a desire contact between the PTC electric heating assemblies 2 and the thermal conductive grooves 160 may be formed by a press force applied to the PTC electric heating assembly 2 by the side surface of the thermal conductive grooves 160 during mounting of the PTC electric heating assembly 2.
  • the PTC electric heating assembly 2 is embedded in the thermal conductive grooves 160 is deeper, the press force applied to the PTC electric heating assembly 2 is larger, and it is more difficult to take out the PTC electric heating assembly.
  • the PTC electric heating assemblies 2 are embedded in the thermal conductive grooves 160 respectively, so that the heat generated by the PTC electric heating assemblies 2 may be conducted to the walls of thermal conductive grooves 160.
  • the walls of thermal conductive grooves 160 not only isolate the medium from the PTC electric heating assemblies 2, but also conduct the heat.
  • the walls of thermal conductive grooves 160 may be made of a metal having a good conducting performance, such as aluminum or aluminum alloy.
  • At least one side surface of the thermal conductive grooves 160 is inclined inwardly in the up and down direction, it is of benefit for demolding and manufacturing the PTC electric heating assemblies 2 to form a favorable contact between the PTC electric heating assemblies 2 and the thermal conductive grooves 160.
  • each of the thermal conductive grooves 160 may be the vertical surface, and the other side surface thereof may be an inclined surface inclined inwardly from top to bottom.
  • both side surfaces of each of the thermal conductive grooves 160 may be the inclined surface inclined inwardly from top to bottom.
  • the fixed electrode 22 may be served as a pressure element when connected to a power, the fixed electrode 22 is inclined inwardly so as to adapt to the inclined side surface of the thermal conductive grooves 160.
  • the PTC electric heating assembly 2 may be embedded in the thermal conductive grooves 160 conveniently, and a desire contact between the PTC electric heating assemblies 2 and the thermal conductive grooves 160 may be formed by a press force applied to the PTC electric heating assembly 2 by the side surface of the thermal conductive grooves 160 during mounting of the PTC electric heating assembly 2.
  • the fixed electrode 22 is made of conductive material; preferably, the fixed electrode 22 is made of metal having a large hardness, such as Al, Au, stainless steel or aluminum alloy.
  • the fixed electrode 22 comprises a terminal 221 extended from an upper end of the fixed electrode 22 and configured for coupling to a power supply.
  • the terminal 221 can be fixed on the fixed electrode 22 by a welding or riveting.
  • the terminal 221 is configured to electrically connect to the circuit control module 3.
  • the area of the side surface of the fixed electrode 22 is larger than or equal to that of the PTC heating module 20.
  • the area of the side surface of the fixed electrode 22 is larger than that of the PTC heating module 20, so that the fixed electrode 22 extend upwardly and/or downwardly beyond the PTC heating module 20 so as to form extending portions.
  • a heat conducting sealing glue is filled between the extending portions of the two fixed electrodes so as to insulate the two fixed electrodes 22 and avoid a short circuit therebetween; the heat conducting sealing glue is made of organosilicone sealant, polyurethane sealant or epoxy resin sealant.
  • the PTC heating elements of the PTC electric heating assembly 2 and electrode plate of the conventional electric heating assembly are contacted directly and rigidly, so that an interfacial gap is formed therebetween.
  • There may be manufacturing tolerance when manufacturing PTC heating elements therefore, when the PTC heating elements have a different thickness, an incomplete contact will occur between some of the PTC heating elements and electrode when arranging plurality of PTC heating elements on a electrode plate.
  • a contact electrode 21 is disposed between the PTC heating module 20 and the fixed electrode 22.
  • the contact electrode 21 is made of electrically and thermally conductive material which is compressible elastically deformable, therefore an elastic compression deformation of the contact electrode 21 may occur so as to make up the thickness tolerance of the PTC heating elements to make sure that the contact between the PTC heating elements and the two electrode assemblies is favorable.
  • the contact electrode 21 is made of electrically and thermally conductive material which is compressible elastically deformable, such as electric conducting polymer (for example, electric conducting polymer, stannum, stannum alloy, copper, copper alloy or electric conducting graphite), metal and alloy (for example, stannum, stannum alloy, copper, copper alloy or electric conducting graphite.
  • electric conducting polymer for example, electric conducting polymer, stannum, stannum alloy, copper, copper alloy or electric conducting graphite
  • metal and alloy for example, stannum, stannum alloy, copper, copper alloy or electric conducting graphite.
  • an electrically and thermally conductive material which is compressible elastically deformable can be used for preparing the contact electrode 21.
  • the heat generated by the PTC heating elements can be conducted to the fixed electrode 22 fully, and the PTC heating elements can be used safely for a long time under the high voltage condition.
  • the electrode assembly which comprises a contact electrode is suited to high voltage condition. When the voltage is lower than 400 Volts, the electrode assembly could comprise a fixed electrode without a contact electrode.
  • the PTC electric heating assembly further comprises an insulating layer 23 disposed on the outer surface of each of the fixed electrode 22, the insulating layer 23 has a U-shape section so as to cover the outer surface and the bottom surface of the fixed electrode 22, thus the fixed electrode 22 are insulated from the thermal conductive grooves 160.
  • the insulating layer 23 is an electrical-insulation and thermal conductive film and made of a material with an electrical insulatibity and a high thermal conductivity, so as to reduce the heat loss.
  • the insulating layer 23 may be made of an organic silicon rubber, a butadiene- acrylonitrile rubber or a ceramic insulating material.
  • the electrode plate should be insulated from the thermal conductive grooves 160.
  • an insulating layer 23 is disposed between the fixed electrode and the thermal conductive grooves 160.
  • the PTC electric heating assemblies 2 further comprises a slid film 24 covered on an outer surface of the insulating layer 23.
  • the slid film 24 may be made of materials which have high strength and a smooth surface, such as organic polymer film or metal film.
  • the slid film includes polyimide film or copper foil film. With the slid film 24 covered on the outer surface of the insulating layer 23, the insulating layer 23 may be protected effectively from being destroyed.
  • the PTC electric heating assembly 2 includes a plurality of the PTC heating elements
  • the plurality of the PTC heating elements are difficultly fixed due to different thicknesses or improper arranging positions of the PTC heating elements.
  • the PTC heating element is very sensitive to the temperature and the heating effects of the plurality of the PTC heating elements are not identical, the plurality of the PTC heating elements may contact each other during heating, thus causing that the plurality of the PTC heating elements can not give full play to their heating performance.
  • the PTC heating element when used in the electric vehicle, the PTC heating element subjects to a high voltage, so that a distance between the two electrode plates is increased in order to avoid arc discharge occurred between the two electrode plates, thus the requirement of the distance between the two electrode plates is strict.
  • increasing the distance between the two electrode plates may increase the volume and the occupied space of the PTC heating element.
  • the PTC heating module 20 comprises an insulation fixing frame 26 and a plurality of PTC heating elements 27.
  • the insulation fixing frame 26 has a plurality of fixing units 260, and the plurality of PTC heating elements 27 is fixed in the plurality of fixing units 260.
  • the insulation fixing frame 26 is used to fix the plurality of the PTC heating elements 27 therein and isolate the adjacent PTC heating elements 27 from each other.
  • the PTC heating elements 27 can be fixed stably, the interference with each other during operation can be reduced, and the PTC heating elements 27 can give full play to the heating performance thereof.
  • the PTC heating module 20 is the heating element of the PTC electric heating assembly 2.
  • the PTC heating module 20 includes at least two PTC heating elements 27.
  • the PTC heating module 20 includes six PTC heating elements 27.
  • the PTC heating elements 27 may be any common PTC heating elements used in the art, in some embodiments of the present disclosure, the PTC heating elements 27 is ceramic PTC heating pieces, and conductive electrodes (not shown) are disposed on opposite side surfaces of the ceramic PTC heating pieces by spraying or printing, and the conductive electrodes may be silver electrodes.
  • the number of the PTC heating elements 27 is not limited and adjustable according to the heating requirements.
  • the PTC electric heating assembly 2 further comprises an insulation fixing frame 26.
  • the heating module 20 comprises the insulation fixing frame 26 and the PTC heating elements 27 disposed in the insulation fixing frame 26, and the heating module 20 is disposed between the first electrode assembly and the second electrode assembly, therefore the PTC heating elements 27 can be fixed properly.
  • the insulating fixing frame 26 comprises a plurality of first isolating bars 261 and a plurality of second insolating bars 262.
  • the first isolating bars 261 are parallel to and spaced apart from one another
  • the second insolating bars 262 are parallel to and spaced apart from one another.
  • Each of the second insolating bars 262 is perpendicular to and intersected with the plurality of the first insolating bars 261 so as to form a plurality of fixing units 260.
  • the insulating fixing frame As shown in Fig.9, in one embodiment of the present disclosure, the insulating fixing frame
  • the 26 comprises two first insolating bars 261 and three second insolating bars 262.
  • the two first isolating bars 261 are parallel to and spaced from each other by a first predetermined interval
  • the three second insolating bars 262 are parallel to and spaced from one another by a second predetermined interval.
  • Each of the first insolating bars 261 is perpendicular to and intersected with the second insolating bars 262 so as to form six fixing units 260, thus providing six mounting positions for six PTC heating elements 27.
  • the number of the fixing units 260 can be determined by the number of the PTC heating elements 27, then the number of the first isolating bars 261 and the second insolating bars 262 are further determined.
  • the insulation fixing frame 26 is not limited to the structure and configuration shown in Fig. 9.
  • the two first insolating bars 261 are disposed along a width direction of the PTC heating elements 27, and a distance between the two first insolating bars 261 is equal to a length of the PTC heating elements 27 (a size of the PTC heating element 27 in a length direction thereof), so that the PTC heating element 27 is positioned in the length direction efficiently.
  • the three second insolating bars 262 are disposed along the length direction C of the PTC heating elements 27, and a distance between the two second insolating bars 262 is equal to a width of the PTC heating elements 27 (a size of the PTC heating element 27 in the width direction thereof), so that the PTC heating element 27 is positioned in the width direction efficiently.
  • the adjacent PTC heating elements 27 are spaced apart from each other by the first insolating bars 261, and in the width direction, the adjacent PTC heating elements 27 are spaced apart from each other by the second insolating bars 262.
  • the adjacent PTC heating elements 27 are spaced apart from each other by the first isolating bars 261 and/or the second insolating bars 262, thus reducing the mutual influence of the PTC heating elements 27 during the operation, so that the PTC heating elements 27 can be improved in heating power thereof and give full play to the heating performance thereof.
  • the insulation fixing frame 26 is disposed between the two fixed electrode 22 and may be adhered to the two fixed electrode 22 by an adhesive, so that a thickness of the insulation fixing frame 26 is substantially equal to that of the PTC heating elements 27, so that the insulation fixing frame 26 is fixed between the fixed electrode 22 reliably, thus fixing the PTC heating elements 27 therein reliably, without affecting proper contacts between the PCT heating elements 27 and the contact electrode 21 (or fixed electrode 22).
  • the PTC heating elements 27 are isolated and positioned in the length direction and the width direction by the insulation fixing frame 26, and are clamped and held between the two contact electrodes 21 in the thickness direction, so that the PTC heating elements 27 can be efficiently positioned.
  • a person skilled in the art will appreciate that, when the PTC electric heating assembly 2 is used under a high voltage condition, in order to avoid the arc discharge occurred between the first electrode assembly and the second electrode assembly and meet the safe standard, the requirements for the distance between the first electrode assembly and the second electrode assembly are strict. Consequently, the volume of the PTC electric heating assembly 2 is increased.
  • the insulation fixing frame 26 is made of a material having a high temperature resistance and a high voltage resistance, so that a high voltage resistance between the first electrode assembly and the second electrode assembly is improved, a possibility of the arc discharge occurred between the first electrode assembly and the second electrode assembly is reduced and the PTC heating elements 27 are prevented from being broken down.
  • the insulation fixing frame 26 having the high voltage resistance and high temperature resistance is made of an organic polymer, such as organic silicon or polyimide, with a thermal conductivity between 0.02W/(m » K) and 5.0W/(m » K).
  • the insulation fixing frame 26 may be manufactured by a process of injection molding. With the insulation fixing frame 26, an insulating performance between the first electrode assembly and the second electrode assembly is efficiently increased, so that the PTC electric heating assembly 2 can be adapted to a high voltage condition, and the safety and adaptability thereof are improved.
  • an electric heating device comprises a casing 1 defining a plurality of thermal conductive grooves 160 and a medium circulating cavity 12 hermetically isolated from the thermal conductive grooves 160, and a plurality of PTC electric heating assemblies 2.
  • the medium circulating cavity 12 comprises a medium inlet 13 and a medium outlet 14.
  • the PTC electric heating assemblies 2 may be the PTC electric heating assemblies 2 described with reference to the above embodiments.
  • two side surfaces of the thermal conductive grooves 160 are inclined so that the PTC electric heating assemblies 2 can be mounted into the thermal conductive grooves 160 properly.
  • the PTC electric heating assemblies 2 are embedded in the thermal conductive grooves 160 respectively, so that the heat generated by the PTC electric heating assemblies 2 may be conducted to the walls of thermal conductive grooves 160.
  • the walls of thermal conductive grooves 160 not only isolate the medium from the PTC electric heating assemblies 2, but also conduct the heat.
  • the walls of thermal conductive grooves 160 may be made of a metal having a good conducting performance, such as aluminum or aluminum alloy.
  • At least one side surface of the thermal conductive grooves 160 is inclined inwardly in the up and down direction, it is of benefit for demolding and manufacturing the PTC electric heating assemblies 2 to form a favorable contact between the PTC electric heating assemblies 2 and the thermal conductive grooves 160.
  • the insulation fixing frame 26 is disposed onto the contact electrode 24 of the first electrode assembly, then the PCT heating elements 27 are disposed into the fixing units 260 of the insulation fixing frame 22 respectively.
  • the second electrode assembly is disposed on the other side of the insulation fixing frame 26.
  • the heat conducting sealing glue is filled between edges the two electrode assemblies.
  • the insulating layer 23 is disposed on the outer surfaces and the bottom surfaces of the two fixed electrode 22, finally, a slid film 24 is covered on the outer surfaces of the insulating layer 23 so as to form the PTC electric heating assemblies 2.
  • the assembled PTC electric heating assemblies 2 are embedded into the thermal conductive grooves 160 respectively.
  • the medium is fed into the medium circulating cavity 12 through the medium inlet 13 of the casing 1, then the PTC electric heating assemblies 2 are energized, the PTC heating elements 21 start heating.
  • the heat is conducted to the medium via the electrode plates, insulating layer 23 and the walls of the thermal conductive grooves 160.
  • the medium flows out of the medium circulating cavity 12 through the medium outlet 14 of the casing 1 for heating, defrosting, defogging the interior of a vehicle and preheating battery of the vehicle.
  • the inner surface of the first fixed electrode facing to the PTC heating module is the vertical surface; the outer surface of the fixed electrode facing to the insulating layer is the inclined surface inclined inwardly from top to bottom. And also, two side surfaces of the thermal conductive grooves are inclined.
  • the PTC electric heating assemblies are mounted into the thermal conductive grooves.
  • the PTC electric heating assemblies may be stably positioned in the thermal conductive grooves without other fixed part (pressure element).
  • the heat generated by the PTC electric heating assembly can be transmitted to the medium in the medium circulating cavity directly via the thermal conductive grooves, the thermal losses may be reduced, the mounting space of the PTC electric heating assemblies can be saved, and the mass can be reduced. Therefore, the heating effect of the electric heating device may be efficient increased.
  • the electric heating device may be better for supplying heating, defrosting, defogging and heating other component.
  • the electrode assembly of the PTC electric heating assembly of the electric heating device further comprises a contact electrode disposed between the fixed electrode and the PCT heating elements, comparing with the conventional direct contact between the rigid PTC heating elements and the fixed electrode, the contact resistance may be reduced and the heat conduction at the interface may not be affected.
  • the heat generated by the PTC heating elements can be conducted to the fixed electrode fully, and the PTC heating elements can be used safely for a long time under the high voltage condition.
  • the PTC electric heating assembly according to the present disclosure further comprises the slid film covered on the outer surface of the insulating layer, thus the insulating layer may be protected well.
  • the fixing units are formed in the electric heating assembly by the insulation fixing frame, and the PTC heating elements are fixed in the fixing units in one to one correspondence relationship so as to ensure the stability of the PTC heating elements. Furthermore, the PTC heating elements are also isolated from one another by means of the insulation fixing frame, so that the interference among the PTC heating elements can be reduced during operation, give full play to the heating performance thereof, and improve the heating power and the heating effect thereof.
  • the heating power and the heating efficiency of the electric heating device are improved efficiently, and the heating device can provide heat for heating, defrosting, defogging and heating other component of the electric vehicle.
  • the insulation fixing frame is made of the material having a high temperature resistance and a high voltage resistance, and the high voltage resistance between the two electric heating assemblies is improved, thus reducing the arc discharge between the two electric heating assemblies and preventing the PTC heating elements from being broken down due to the arc discharge.
  • the PTC electric heating assemblies are suitable for the high voltage condition and have an excellent safety, and the PTC heating module can be used safely in the high voltage system (the electric vehicle) for long time.
  • another mainly improvement of the present disclosure may be that the structure of the casing of the present disclosure is different from a traditional casing. A length of the medium passing path is increased in the casing of the present disclosure.
  • the casing 1 comprises: a shell body 15; and a thermal conductive trough 16 mounted onto the shell body 15.
  • the shell body 15 is a hollow rectangular parallelepiped and made of an insulating material. A top of the shell body 15 is opened.
  • the shell body 15 is manufactured by a process of injection molding with plastics having thermo stability, and configured to form the medium circulating cavity 12 for accommodating cooling liquid.
  • the shell body 15 comprises a bottom plate 150 and four side plates so as to form a receiving chamber 155.
  • the four side plates such as a first side plate 151, a second side plate 152, a third side plate 153 and a fourth side plate 154, are extended upwardly from four edges of the bottom plate 150 along a substantially vertical direction.
  • the first side plate 151 and the second side plate 152 are disposed oppositely along a length direction of the shell body 15, and the third side plate 153 and the fourth side plate 154 are disposed oppositely along a width direction of the shell body 15.
  • the shell body 15 comprises a medium inlet 13 for feeding the medium into the casing and a medium outlet 14 for discharging the medium out of the casing.
  • a distance between positions of the medium inlet 13 and the medium outlet 14 is as far as possible, for example, as shown in Fig.12
  • the medium inlet 13 and the medium 14 may be formed in two ends of the second side plate 152.
  • the medium inlet 13 and the medium 14 may be also formed in two ends of the first side plate 151, or formed in the third side plate 153 and the four side plate 154 respectively (as shown in Fig.4).
  • the thermal conductive trough 16 is mounted above the shell body 15; the thermal conductive trough 16 is made of heat conducting material (for example, metal).
  • the thermal conductive trough 16 is manufactured by a process of die-cast molding with aluminum alloy to form the thermal conductive grooves 160 for accommodating the PTC electric heating assemblies 2.
  • the thermal conductive trough 16 has a corrugated vertical section and comprises a corrugated top plate 161, each of the thermal conductive grooves 160 is defined by two side isolating plates 162, a front plate 166, a real plate 168 and a bottom plate 167.
  • each of the side isolating plates 162, the front plate 166 and the rear plate 168 is connected to the top plate 161, and a lower portion of each of the side isolating plates 162, the front plate 166 and the rear plate 168 is connected to the bottom plate 167. And adjacent side isolating plates 162 are spaced apart from each other.
  • the thermal conductive grooves 160 are configured for mounting the PTC electric heating assemblies 2.
  • the thermal conductive grooves 160 are inclined. In some embodiments, both two side surfaces of the thermal conductive grooves 160 are inclined.
  • the PTC electric heating assemblies 2 are adapted to the thermal conductive grooves 160 and mounted therein. Thus, the thermal conductive grooves 160 isolate the medium from the PTC electric heating assemblies 2 and conduct the heat.
  • the thermal conductive grooves 160 may be made of a material having an excellent conducting performance, such as metal. In some embodiments, the thermal conductive grooves 160 may be made of aluminum or aluminum alloy. In one embodiment, an open end of the thermal conductive grooves 160 is connected to the top plate 161, and the thermal conductive grooves 160 extends into an receiving chamber 155 of the shell body 15. As shown in Fig.4, the thermal conductive grooves 160 are formed by two side isolating plates 162, the front plate 166, the real plate 168 and the bottom plate 167, and the plurality of thermal conductive grooves 160 form the heating chamber 11.
  • the top plate 161, the side plates 162, the front plate 166, a real plate 168 and the bottom plate 167 are made of a material having an excellent conducting performance and formed integrally into one piece, thus the thermal conductive grooves 160 formed may have a stable structure and an excellent conducting performance.
  • the receiving chamber 155 of the shell body 15 is divided into a heating chamber 11 for accommodating the PTC electric heating assemblies 2 and a medium circulating cavity 12 for accommodating the medium by the side plates 162.
  • the medium circulating cavity 12 includes a plurality of circulating grooves 120 disposed between the side isolating plate 162 and the shell body 15 and located under the top plate 161.
  • the outermost circulating groove 120 is formed between the outermost thermal conductive groove 160 and the shell body 15, the remaining circulating grooves 120 are formed between the adjacent thermal conductive grooves 160.
  • the thermal conductive grooves 160 are sealed relative to the circulating grooves 120, so as to prevent the medium from damaging the PTC electric heating assemblies 2.
  • the communicating channel 17 is formed by the walls of the thermal conductive grooves 160 and the first side plate 151 or the second side plate 152 of the shell body 15 (As shown in Fig.13, a person skilled in the art will appreciate that Fig.13 only shows the position of the communicating channel 17, the communicating channel 17 is located inside the casing).
  • the thermal conductive grooves 160 are communicated via the communicating channel 17, and the medium circulating cavity 120 defines a curved path.
  • the medium is fed into the medium circulating cavity 120 via the medium inlet 13 and then passes through the medium circulating cavity 120 along the curved path, so that the length of the medium passing path is increased, the heat absorbing time is increased and the heating absorbing efficiency is improved.
  • the medium flows around the thermal conductive grooves 160 so as to improve the heating absorbing efficiency.
  • the plurality of thermal conductive grooves 160 are divided into a plurality of first thermal conductive grooves 1601 and a plurality of second thermal conductive grooves 1602, and the first thermal conductive grooves 1601 and the second thermal conductive grooves 1602 are arranged alternately.
  • the first thermal conductive grooves 1601 is connected to the first side plate 151, and the communicating channel 17 is formed between the first thermal conductive grooves 1601 and the second side plate 152.
  • the second thermal conductive grooves 1601 is connected to the second side plate 152, and the communicating channel 17 is formed between the second thermal conductive grooves 1601 and the first side plate 151.
  • the circulating grooves 120 are communicated to each other by the communicating channel
  • the medium is fed into the medium circulating cavity 12 via the medium inlet 13, and then passes through the S-shaped medium circulating cavity 12 along a circumferential and curved path, finally discharged from the medium outlet 14.
  • the flow path in the S-shaped medium circulating cavity 12 is the longest flow path between the inlet 13 and the outlet 14.
  • the medium flows around the thermal conductive grooves 160 so as to efficiently absorb the heat generated by the PTC electric heating assemblies 2 embedded into the thermal conductive grooves 160, and a heat efficiency of the electric heating device is improved.
  • the number of the thermal conductive grooves 160 is nine, the number of the first thermal conductive grooves 1601 is five, and the number of second thermal conductive grooves 1602 is four.
  • the number of the thermal conductive grooves 160, the first thermal conductive grooves 1601 and second thermal conductive grooves 1602 is adjustable according to requirements.
  • thermal conductive trough 160 are arranged parallel to one another along a length direction of the thermal conductive trough 16.
  • a communicating channel 17 is formed by the plates of the thermal conductive grooves 160 and the first side plate or the second side plate, thus the length of the thermal conductive grooves 160 can be shorter than the thermal conductive trough 16. Therefore more thermal conductive grooves 160 can be arranged for accommodating the PTC electric heating assemblies 2.
  • the medium When the medium passes through the medium circulating cavity 12, the medium may flow through two sides of the thermal conductive grooves 160 or three sides (two side surfaces and a bottom surface) of the thermal conductive grooves 160.
  • the heat collected by the medium can be increased, thus the heat efficiency of the electric heating device can be enhanced.
  • the casing of the present disclosure may be any casing which can form a medium circulating cavity with a longer flow path (For example, curved path).
  • the structure of the plurality of thermal conductive grooves 160 which are arranged parallel to one another along a length direction of the thermal conductive trough 16 is reasonable and suitable for mounting the PTC electric heating assemblies.
  • the thermal conductive trough 16 comprises an annular plate 163 extended upwardly from the thermal conductive trough 16.
  • the annular plate 163 is disposed on the top of the shell body 15.
  • the shell body 15 comprises a connecting element 156 formed on an upper end of the shell body 15.
  • a mounting element 164 is disposed on the annular plate 163; the mounting element 164 is disposed in the connecting element 156.
  • the thermal conductive trough 16 is mounted on the shell body 15 via a screw through a hole in the mounting element 164 and the connecting element 156.
  • a sealing ring 61 is disposed between the thermal conductive trough 16 and the shell body 15.
  • the sealing ring 61 may be made of a plastic injection element which has an excellent performance under both high temperature and low temperature to make sure that the shell body 15 is sealed from the thermal conductive trough 16 to prevent the medium in the shell body 15 from leaking.
  • the shell body 15 comprises a fixed element 158 disposed on an outside wall of the shell body 15.
  • the fixed element 158 comprises a mounting hole.
  • the electric heating device of the present disclosure may be mounted into a vehicle via a screw through the mounting hole of the fixed element 158.
  • the shell body 15 further comprises a strengthening rib 1571 configured for reinforcing the shell body 15 and improving strength of the shell body 15 to make sure that the shell body 15 can not deform during the operation of the electric heating device is o.
  • the shell body 15 further comprises an inner strengthening rib 1572 configured for improving strength of the shell body 15, increasing a water resistance and increasing the contact time of the cooling liquid and the thermal conductive trough 16, therefore the heat transferred by the thermal conductive trough 16 can be taken away sufficiently.
  • the shell body 15 further comprises a vent 159 communicated with the medium circulating cavity 12 and configured to make sure that a water vapor in the shell body 15 can be discharged timely during a long time operation of the electric heating device so as to protect the casing.
  • the plurality of thermal conductive grooves 160 comprises a strengthening rib 165 formed on the outside thereof.
  • the strengthening rib 165 is configured for improving strength of the thermal conductive trough 16, increasing a water resistance and increasing the contact time of the cooling liquid and the thermal conductive trough 16, therefore the heat transferred by the thermal conductive trough 16 can be taken away sufficiently.
  • the plurality of thermal conductive grooves 160 is extended into the receiving chamber 155 of the shell body 15. With the inner strengthening rib 1572 and the strengthening rib 165, the plurality of thermal conductive grooves 160 can be fixed in the shell body 15 properly.
  • the size of the PTC electric heating assemblies 2 is corresponded to the size of each thermal conductive groove 160, and each thermal conductive groove 160 accommodates one PTC electric heating assemblies 2.
  • each thermal conductive groove 160 accommodates one PTC electric heating assemblies 2.
  • the thermal conductive grooves 160 extend into the receiving chamber 155 of the shell body 15.
  • the shell body 15 further comprises a block 157. Two adjacent blocks 157 may form an mounting portion for fastening the thermal conductive grooves 160.
  • the plurality of thermal conductive grooves 160 of the thermal conductive trough 16 are fixed into the mounting portion to make the connection between the thermal conductive trough 16 and the shell body 15 stably.
  • the plurality of thermal conductive grooves 160 may also comprise a block disposed on a bottom surface thereof and at least on side surface thereof.
  • the block of the thermal conductive groove 160 has a width smaller than that of the thermal conductive groove 160.
  • the shell body 15 may comprise a slot formed on four side plates of the shell body 15 and an inner side of the bottom plate 150.
  • the block is mounted in the slot so that the thermal conductive trough 16 is fixed in the receiving chamber 155.
  • the block of the thermal conductive grooves 160 is connected to the slot on the bottom plate 150 and the slot on the first side plate 151 or the second side plate 152 respectively.
  • block of the first thermal conductive groove 1601 is connected to the slot on the bottom plate 150 and the first side plate 151.
  • the communicating channel is formed between the first thermal conductive groove 1601 and the second side plate 152.
  • the communicating channel 17 is formed between the second thermal conductive groove 1602 and the first side plate 151.
  • the plurality of circulating grooves is communicated with each other via the communicating channel 17.
  • the medium flows through the communicating channel 17 between the thermal conductive grooves 160 and the first side plate 151 or the second side plate 152.
  • the medium flows through two sides or three sides (involve partial bottom surface) of the thermal conductive grooves 160 and around the thermal conductive grooves 160 to increase the flow path. Therefore, the medium may absorb the heat generated by the PTC electric heating assemblies 2 effectively.
  • the PTC electric heating assemblies 2 is embedded into the thermal conductive grooves 160 by a clamp, then the thermal conductive trough 16 is mounted to the shell body 15, a sealing ring 61 is disposed between the shell body 15 and the thermal conductive trough 16. Then the thermal conductive trough 16 is mounted onto the shell body 15 via a screw through the hole in the mounting element 164 and the connecting element 156. Then the thermal conductive grooves 160 are embedded into the receiving chamber 155 of the shell body 15 to form the medium circulating cavity 12.
  • the medium is fed into the medium circulating cavity 12 through the medium inlet 13 of the shell body 15, when the PTC electric heating assemblies 2 are energized, the PTC heating elements 27 start heating, and the heat is conducted to the medium via the contact electrode 21, the fixed electrode 22, the insulating layer 23, the slid film and the thermal conductive grooves 160.
  • the medium flows out of the medium circulating cavity 12 through the medium outlet 14 of the thermal conductive trough 16 so as to carry the heat for heating, defrosting and defogging the interior of the vehicle.
  • the casing of the electric heating device comprises a shell body, and a thermal conductive trough disposed on the top of the shell body.
  • the heating chamber comprises a plurality of thermal conductive grooves formed by the side isolating plate; the medium circulating cavity comprises plurality of thermal medium circulating grooves.
  • the communicating channel is formed by the plurality of thermal conductive grooves and the first side plate or the second side plate.
  • the medium circulating cavity has a curved path (for example, S-shaped medium circulating cavity) formed by the communicated communicating channel.
  • the medium passes through the medium circulating cavity along a curved path, so that the passing path of the medium and the time for absorbing heat are increased.
  • the medium flows around the walls of thermal conductive grooves so as to increase the contact area and improve the heating absorbing efficiency, and the heat efficiency of the electric heating device is further improved.
  • the electric heating device further comprises a heat-insulation module 4 disposed on the casing 1 and disposed between the PTC electric heating assemblies 2 and the circuit control module 3, the heat- insulation module 4 comprises a thermal conductive rubber plate 41, heat- insulation foam plate 43 disposed above the thermal conductive rubber plate 41, and a heat- insulation rubber plate
  • the thermal conductive rubber plate 41 is configured to conduct the heat transferred upwardly back to the PTC electric heating assemblies 2, then the heat can be taken away by the cooling liquid.
  • the heat-insulation foam plate 43 is configured to prevent the heat generated by the PTC electric heating assemblies 2 from transmitting upwardly.
  • the heat- insulation rubber plate 42 is configured for bonding the thermal conductive rubber plate 41 and the heat- insulation foam plate 43. The heat- insulation rubber plate 42 can fasten the heat-insulation foam plate 4 effectively and prevent the heat transferred from the thermal conductive rubber plate 41 from transmitting upwardly.
  • an internal environment temperature of the electric heating device may be reduced dramatically, and the working environment temperature may be about 60 °C which is lower than the normal working temperature (about 80 °C) of the electronic component, therefore the circuit control module 3 may be protected effectively.
  • the heat-insulation module 4 has a three layer structure and a thickness of about 9 millimeters to about 11 millimeters.
  • the first layer may be the thermal conductive rubber plate 41, and the thermal conductive rubber plate 41 has a thickness of about 1.5 millimeters to about 2.5 millimeters.
  • the thermal conductive rubber plate 41 may be made of heat-conducting glue which has a thermal conductivity larger than 1.5 W/(m* K) and a heat-resistance temperature higher than 280 °C .
  • the heat-conducting glue has a thermal conductivity of about 1.5W/(m* K) to about 3.0W/(m* K) and a heat-resistance temperature of about 280 °C to about 300 °C .
  • the thermal conductive rubber plate 41 may be made of high temperature silicon rubber or epoxy resin.
  • the third layer may be the heat- insulation foam plate 43, and the heat- insulation foam plate 43 has a thickness of about 5 millimeters to about 7 millimeters.
  • the insulation foam 43 may be made of insulation foam with poor heat-conducting performance, such as an insulation foam having a thermal conductivity smaller than 0.15 W/(m* K) and a heat-resistance temperature lower than 200 °C , preferably, the insulation foam has a thermal conductivity of about 0.05W/(m* K) to about 0.15W/(m* K) and a heat-resistance temperature of about 200 °C to about 300 °C .
  • the insulation foam may be made of closed foam material, such as polyurethane foam material or silicon rubber foam material.
  • the second layer is disposed between the first and the third layer.
  • the second layer is the heat-insulation rubber plate 42 which has a thickness of about 1.5 millimeters to about 2.5 millimeters.
  • the heat- insulation rubber plate 42 is made of colloidal material which has a poor heat-conducting performance and an excellent elasticity.
  • the colloidal material has a thermal conductivity smaller than 0.15 W/(m* K) and a heat-resistance temperature lower than 200 °C .
  • the heat- insulation rubber plate 42 has a thermal conductivity of about 0.05W/(m*K) to about 0.15W/(m*K) and a heat-resistance temperature of about 200 °C to about 300 ° C .
  • the heat-insulation rubber plate 42 may be made of silica gel.
  • the heat- insulation rubber plate 42 is configure for bonding the thermal conductive rubber plate 41 and the heat- insulation foam plate 43 to fasten the heat-insulation foam plate 43.
  • the heat-insulation rubber plate 42 can prevent the heat transferred from the thermal conductive rubber plate 41 from transmitting upwardly to the circuit control module 3.
  • the heat-insulation rubber plate 42 may show a cushioning effect when the vehicle is running in a bumpy road.
  • the heat- insulation rubber plate 42 has an excellent elasticity and a large amount of elastic deformation which may reduce the damage possibility of the PTC electric heating assemblies and the heat- insulation foam plate 43.
  • the heat-insulation rubber plate 42 is bonded between the thermal conductive rubber plate
  • the plurality of PTC electric heating assemblies 2 is embedded into the thermal conductive grooves 160 by a clamp, and the heat-insulation module 4 is mounted on the top of the casing 1.
  • the circuit control module 3 is mounted on the heat-insulation module 4.
  • the thermal conductive rubber plate 41 is close to the PTC electric heating assemblies 2 and the heat- insulation foam plate 43 is close to the circuit control module 3.
  • the upper cover 5 is disposed on the top of the circuit control module 3 and fixed on the casing 1 to finish the assembling of the electric heating device and the circuit control module 3.
  • the medium is fed into the medium circulating cavity 12 through the medium inlet 13 of the shell body 15, when the PTC electric heating assemblies 2 are energized, the PTC electric heating assemblies 2 start heating, and the heat is conducted along the upward, downward, right and left direction.
  • the heat conducted along the downward, right and left direction can be taken away by the medium (cool liquid) flowing through the casing. While the heat conducted along the upward direction can be prevented from transmitting to the circuit control module 3 upwardly due to the heat-insulation module 4, moreover, the heat can be transmitted back to the PTC electric heating assemblies 2 via the thermal conductive rubber plate 41 and then be taken away by the medium (cool liquid) in the medium circulating cavity 12 of the casing 1.
  • the electronic component on the circuit control module 3 may be protected effectively, the service life of the electric heating device can be increased, and the electric heating device may have a stable performance.
  • the medium may absorb more heat so as to reduce heat losses and improve the heat efficiency of the electric heating device.
  • the electric heating device comprises a heat-insulation module which comprises a thermal conductive rubber plate, a heat-insulation foam plate disposed above the thermal conductive rubber plate, and a heat-insulation rubber plate disposed between the thermal conductive rubber plate and the heat-insulation foam plate.
  • the heat conducted upward form the PTC electric heating assembly may be transmitted back to the PTC electric heating assembly via the thermal conductive rubber plate and then be taken away by the medium.
  • the heat-insulation foam plate may prevent the heat generated by the PTC electric heating assembly from transmitting upwardly.
  • the heat-insulation rubber plate is configured for bonding the thermal conductive rubber plate and the heat-insulation foam plate to fasten the heat-insulation foam plate effectively and prevent the heat transferred from the thermal conductive rubber plate from transmitting upwardly.
  • an internal environment temperature of the electric heating device may be reduced dramatically, and the working environment temperature may be about 60 °C which is lower than the normal working temperature (about 80 °C) of the electronic component, therefore the circuit control module 3 may be protected effectively.
  • the electric heating device may have a long service life and a stable performance.
  • the electric heating device further comprises a circuit control module 3.
  • the circuit control module 3 comprises a control panel and an electronic component disposed on the control panel.
  • the electronic component (For example, IGBT module) may be any common electronic component used in the art which has ability of resistant high voltage.
  • the electronic component is the key part of the circuit control module 3, of which lower temperature safer.
  • the electronic component is electrically connected to the plurality of PTC electric heating assemblies (the terminal of the fixed electrode), and configured to regulate the number of the PTC electric heating assembly, therefore the electric heating device may output different power to meet the requirements of different working condition of the vehicle.
  • the electric heating device further comprises an upper cover 5 connected to the shell body 15.
  • the upper cover 5 comprises a control cavity; the circuit control module 3 is disposed in the control cavity.
  • the upper cover 5 is configured to make sure that the circuit control module 3 is used in a sealing environment to prevent water from entering and destroying the circuit control module 3.
  • a seal ring 62 is disposed between the upper cover 5 and the shell body 15.
  • the seal ring 62 may be made of a plastic injection element which has an excellent performance both under high temperature and low temperature to make sure that the upper cover 5 is sealed from the shell body 15 to prevent water and dust from entering the control cavity and destroying the circuit control module 3.
  • control cavity comprises a convex plate 31 and a supporting plate.
  • the convex plate 31 and the supporting plate are connected to the control panel of the circuit control module 3.
  • the convex plate 31 is configured to fasten the
  • IGBT module disposed on the control panel and prevent the control panel from vibrating during vehicle running, and to transmit the heat generated by the IGBT module to the thermal conductive trough 16 timely.
  • the supporting plate is located between the control panel and the heat-insulation module and configured to support the support parts of the control panel to prevent the electronic component on the control panel from loosing or dropping off during vehicle running.
  • the electric heating device further comprises a relay 7 mounted on the shell body 15 and electrically connected to the circuit control module 3.
  • the relay 7 is a safety protection device, when the circuit control module 3 is out of control, the relay 7 may cut off the current in the circuit to avoid explosion.
  • circuit control module and the relay may be any common circuit control module and relay used in the art
  • control panel of the circuit control module, the electronic component and the control parts may be performed by the technologies in the art.
  • the upper cover 5, the convex plate and the supporting plate may be any common structural component used in the art, thus the detail description will be omitted here.
  • An electric vehicle comprises an air conditioning system including the electric heating device described with reference to the above embodiments and a heating exchanger or radiator coupled to the electric heating device.
  • the medium for example, cooling liquid
  • the medium is heated during passing through the electric heating device and then flows into the heating exchanger or radiator, such that the heat is exchanged and released to be used for heating, defrosting, defogging, preheating the battery or realizing other functions.
  • the heating exchanger, radiator and other components of the air conditioning system may be any common heating exchanger, radiator and component used in the art, thus the details description will be omitted.

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

Abstract

L'invention porte sur un ensemble chauffant électrique à coefficient de température positif, sur un dispositif chauffant électrique et sur un véhicule électrique. L'ensemble chauffant électrique à coefficient de température positif (2) comprend un premier ensemble d'électrode comprenant une première électrode fixe ; un second ensemble d'électrode comprenant une seconde électrode fixe ; un module chauffant à coefficient de température positif (20) disposé entre le premier ensemble d'électrode et le second ensemble d'électrode ; et une couche isolante (23) disposée sur une surface externe de chacun du premier ensemble d'électrode et du second ensemble d'électrode ; une surface interne d'au moins l'une de la première électrode fixe et de la seconde électrode fixe dirigée vers le module chauffant à coefficient de température positif (20) étant une surface verticale, une surface externe de la au moins une de la première électrode fixe et de la seconde électrode fixe dirigée vers la couche isolante (23) étant une surface inclinée.
PCT/CN2013/078193 2012-06-27 2013-06-27 Ensemble chauffant électrique à coefficient de température positif, dispositif chauffant électrique et véhicule électrique WO2014000666A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN201210215420.2 2012-06-27
CN201210215420.2A CN103517468B (zh) 2012-06-27 2012-06-27 一种ptc电热元件、电加热装置以及电动车
CN 201220304667 CN202713643U (zh) 2012-06-27 2012-06-27 一种ptc电热元件、电加热装置以及电动车
CN201220304667.7 2012-06-27
CN201220339273.5 2012-07-13
CN201210242341.0 2012-07-13
CN 201220339273 CN202993568U (zh) 2012-07-13 2012-07-13 一种电加热装置以及电动车
CN201210242341.0A CN103542528B (zh) 2012-07-13 2012-07-13 一种电加热装置以及电动车

Publications (1)

Publication Number Publication Date
WO2014000666A1 true WO2014000666A1 (fr) 2014-01-03

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PCT/CN2013/078193 WO2014000666A1 (fr) 2012-06-27 2013-06-27 Ensemble chauffant électrique à coefficient de température positif, dispositif chauffant électrique et véhicule électrique

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EP3290821A1 (fr) * 2016-09-06 2018-03-07 Mahle International GmbH Dispositif de chauffage électrique
EP3290820A1 (fr) * 2016-09-06 2018-03-07 Mahle International GmbH Dispositif de chauffage électrique
EP3228950B1 (fr) 2016-04-07 2019-06-12 LG Electronics Inc. Ensemble de chauffage
CN110243077A (zh) * 2019-06-04 2019-09-17 浙江银轮机械股份有限公司 一种用于安装ptc发热片的传热壳体
EP3592105A1 (fr) * 2016-12-06 2020-01-08 Eberspächer catem GmbH & Co. KG Dispositif de chauffage électrique
EP3496965A4 (fr) * 2016-08-08 2020-04-08 LG Electronics Inc. -1- Module de chauffage et ensemble de chauffage comprenant celui-ci
CN111682139A (zh) * 2020-06-19 2020-09-18 风帆（扬州）有限责任公司 一种高强度动力储能电池
CN114087163A (zh) * 2020-08-25 2022-02-25 比亚迪股份有限公司 压缩机组件和具有其的车辆
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CN114087163A (zh) * 2020-08-25 2022-02-25 比亚迪股份有限公司 压缩机组件和具有其的车辆
WO2024093043A1 (fr) * 2022-11-01 2024-05-10 湖北亿纬动力有限公司 Bloc-batterie

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