CN202713643U - PTC electrical heating element, electrical heating device, and electrombile - Google Patents
PTC electrical heating element, electrical heating device, and electrombile Download PDFInfo
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- CN202713643U CN202713643U CN 201220304667 CN201220304667U CN202713643U CN 202713643 U CN202713643 U CN 202713643U CN 201220304667 CN201220304667 CN 201220304667 CN 201220304667 U CN201220304667 U CN 201220304667U CN 202713643 U CN202713643 U CN 202713643U
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Abstract
The utility model provides a PTC electrical heating element. The PTC electrical heating element comprises a PTC heating component, a first electrode component and a second electrode component which are arranged at two sides of the PTC heating component respectively, and insulating layers which are arranged at the outer side of the first electrode component and the outer side of the second electrode component respectively. Each of the first electrode component and the second electrode component comprises a fixed electrode, wherein the fixed electrode of the first electrode component and/or the second electrode component is a trapezoidal electrode, the inner side surface of the trapezoidal electrode which is towards the PTC heating component is a vertical surface, and the outer side surface of the trapezoidal electrode which is towards the insulating layer is an inclined surface. The utility model also relates to an electrical heating device and an electrombile adopting the PTC electrical heating element. According to the utility model, at least one fixed electrode of the PTC electrical heating element is a trapezoidal electrode, so the PTC electrical heating element can be firmly installed in a heat conducting groove without the aid of a fixation element, and the heat generated by the PTC electrical heating element can be transferred to the medium in a circulation cavity directly through the heat conducting groove, so that the advantage of less heat loss is realized.
Description
Technical field
The utility model relates to the heater field, relates in particular to a kind of PTC electric heating element and electric heater unit for electric motor car.
Background technology
The air conditioning and heating system of tradition fuel-engined vehicle usually with the waste heat of using waste heat from tail gas or engine cool recirculated water as thermal source and introduce heat exchanger, air and heat exchanger that forced draft fan is sent here carry out heat exchange, air after the heating is sent in the car, reaches heating, demist, defrosting and is other purposes that needs the parts of thermal source to heat.Yet, application along with pure electric vehicle and hybrid vehicle, particularly for pure electric vehicle, there are not enough waste heats during its work for the inner heating of automobile, in addition, under the winter extremely cold environment, need defrosting and demist to need equally thermal source before the automobile starting, therefore needing increase electric auxiliary heating device on the basis of motor compressor refrigeration.
Existing electric heater unit comprises housing and is positioned over several PTC electric heating elements in the described housing, the PTC(positive temperature coefficient) characteristics of electric heating element are, its resistivity in certain certain temperature range the time base portion remain unchanged, and when temperature reaches near the Curie temperature of PTC element, its resistivity can increase rapidly in narrower temperature range, near insulator.The PTC element is divided into ceramic PTC and polymer PTC at present, usually use ceramic PTC as heating element, it has temp auto-controlled heating, the safe flames of anger, nonflammable, without characteristics such as potential safety hazards, and can automatically reduce heating power after ambient temperature improves, reach the effect of automatic energy saving, be a kind of comparatively desirable electric heating material.
CN100567843C discloses a kind of electric calorifie installation, described electric calorifie installation has housing, wherein at least one electric heating element of electric calorifie installation is firmly held in this housing and by partition wall and the medium that remains in the torus and separates fully, and this partition wall is divided into heating chamber and torus with housing.Torus has import and the outlet that is respectively applied to introduce and discharge medium.Electric heating element is preferably the PTC electric heating element and is maintained at by clamping force in the recess of partition wall formation; Consult accompanying drawing 3 and Fig. 4 of the disclosure document, in the specific embodiment of this electric calorifie installation, utilize the pressure elements be arranged in equally in the recess electric heating element to be pressed on the opposite side parts of recess in the mode of good contact, pressure elements forms with trapezoidal shape, and pressure elements is with in the electric heating element wedging recess tightly and guarantee full Surface Contact between long sidepiece, electric heating element and the ladder shape part of U-shaped recess.In order to guarantee the good thermal conductivity to the electric heating element both sides, so that the medium in transferring heat in the torus leans against on the side component by making electric heating element, and pressure elements is made by good thermal conductive material and preferred whole surface leans against on the electric heating element and realizes.Yet, such scheme makes the PTC electric heating element obtain good fixing by pressure elements, but simultaneously, because when the PTC electric heating element conducts heat, the caloric requirement that produces on the one side is passed to the side component of U-shaped recess again by pressure elements, and the medium in transferring heat in the torus by the U-shaped recess again is even pressure elements is made by good thermal conductive material, also can the heat-transfer effect of PTC electric heating element be impacted, cause the heat efficiency of electric calorifie installation lower; In addition, pressure elements is set the PTC electric heating element is fixed, also so that the complex structure of electric calorifie installation is installed comparatively trouble.
Summary of the invention
The utility model is pressed in electric heating element on the opposite side parts of recess for the PTC electric heating element that solves existing electric heater unit by the pressure elements that is arranged in equally in the recess, pressure elements is set can be impacted the heat-transfer effect of PTC electric heating element, so that medium can not absorb heat preferably, cause the lower technical problem of the heat efficiency of electric calorifie installation.
In order to solve the problems of the technologies described above, the utility model provides a kind of PTC electric heating element, comprises the PTC heating component, is located at first, second electrode assemblie of PTC heating component both sides, and the insulating barrier of being located at the electrode assemblie outside; Described first, second electrode assemblie comprises fixed electrode, and the fixed electrode of described the first electrode assemblie and/or the second electrode assemblie is trapezoidal electrode, and described trapezoidal electrode is vertical plane towards the medial surface of PTC heating component, is the inclined-plane towards the lateral surface of insulating barrier.
In described PTC electric heating element, preferably, described the first electrode assemblie is identical with the second electrode assemblie, and the fixed electrode of the first electrode assemblie and the second electrode assemblie is trapezoidal electrode.
In described PTC electric heating element, preferably, described first, second electrode assemblie also comprises contact electrode, and described contact electrode contacts with the PTC heating component, and described fixed electrode is between contact electrode and insulating barrier.
In described PTC electric heating element, preferably, described insulating barrier is the insulating heat-conductive film, and described insulating heat-conductive film is coated on lateral surface and the bottom surface of described first, second electrode assemblie.
In described PTC electric heating element, preferably, described PTC electric heating element also comprises synovial membrane, and described synovial membrane is coated on the outer surface of insulating heat-conductive film.
In described PTC electric heating element, preferably, the lateral area of described battery lead plate is greater than the lateral area of PTC heating component, and extends to form extension; Be filled with heat conduction embedding blob of viscose between the extension of described two battery lead plates.
In described PTC electric heating element, preferably, described PTC heating component comprises insulation fixed frame and several PTC elements, and described insulation fixed frame is formed with several fixed cells, and described several PTC elements are individually fixed in described several fixed cells.
In described PTC electric heating element, preferably, described insulation fixed frame comprises several first dividers and several second dividers, described several the first divider parallel interval arrange, described several the second divider parallel interval arrange, and described the first divider and described the second divider square crossing setting; Described PTC heating component comprises several PTC elements, and described several fixed cells are separated to form by described several first dividers and several second dividers.
In described PTC electric heating element, preferably, separate by described the first divider or the second divider between two adjacent PTC elements.
In described PTC electric heating element, preferably, described several first dividers are along the Width setting of PTC element, and the spacing between two adjacent the first dividers equals the width of PTC element; Described several second dividers are along the length direction setting of PTC element, and the spacing between two adjacent the second dividers equals the length of PTC element; The thickness of described several first dividers and/or several the second dividers equals the thickness of PTC element.
The utility model also provides a kind of electric heater unit, comprise housing and several PTC electric heating elements, described housing is formed with several thermal troughs, be used for holding medium and medium supplied to the import in the described torus and be used for medium is directed to the outer outlet of described torus for the torus of medium circulation and being used for of being communicated with torus, and described torus is with respect to described thermal trough sealing setting; Wherein, described PTC electric heating element is aforesaid PTC electric heating element, and described thermal trough is dovetail groove, and its at least one side is the inclined-plane, and described PTC electric heating element is installed in the described dovetail groove and is suitable with described dovetail groove.
In described electric heater unit, preferably, the two sides of described thermal trough are the inclined-plane; The lateral surface of described fixed electrode and the side of described thermal trough are suitable.
In described electric heater unit, preferably, described housing comprises the first housing, is installed on the second housing on the first housing, described several thermal troughs are set on described the second housing, described several thermal troughs extend in described the first housing, form torus between described several thermal troughs and the first housing, described import and outlet are located on the first housing.
In described electric heater unit, preferably, described the second housing comprises connecting wall and partition wall, and described partition wall is separated to form described several thermal troughs, and the openend of described several thermal troughs is connected with described connecting wall; Described torus comprises several cycling elements, and described several cycling elements are formed between partition wall and the first housing; Described the first housing comprises the first side wall and the second sidewall, and described several thermal troughs are formed with passage respectively and between described the first side wall or the second sidewall, and described several cycling elements are connected by described passage.
In described electric heater unit, preferably, described several thermal troughs comprise several first thermal troughs and several second thermal troughs, described several first thermal troughs and several second thermal troughs are arranged alternately, wherein, the first thermal trough is connected with the first side wall, and and the second sidewall between be formed with passage, the second thermal trough is connected with the second sidewall, and and the first side wall between be formed with passage.
The utility model further provides a kind of electric motor car, comprises the air conditioning and heating system, and described air conditioning and heating system comprises aforesaid electric heater unit.
At least one fixed electrode of the PTC electric heating element of electric heater unit of the present utility model is trapezoidal electrode, and described thermal trough is dovetail groove, and its at least one side is the inclined-plane, and described PTC electric heating element is installed in the described dovetail groove and is suitable with described dovetail groove; So that described PTC electric heating element need to can firmly not be installed in the thermal trough by fixture, the heat that the PTC electric heating element produces all can be directly be delivered to medium in the torus by thermal trough, thermal loss is less, so that adopt the heat efficiency of the electric heater unit of this PTC electric heating element effectively to be improved, can be used to preferably electric motor car heating, defrosting, demist and need the parts heating of thermal source for other.
Description of drawings
Fig. 1 is the profile of the electric heater unit of the utility model preferred embodiment.
Fig. 2 is the cutaway view of the PTC electric heating element shown in Fig. 1.
Fig. 3 is the cutaway view that PTC electric heating element shown in Figure 2 is installed on thermal trough.
Fig. 4 is the decomposing schematic representation of PTC electric heating element shown in Figure 2.
Fig. 5 is the schematic diagram of the PTC heating component shown in Fig. 4.
Fig. 6 is the schematic diagram of the insulation fixed frame of the PTC heating component shown in Fig. 4.
Fig. 7 is the combination schematic diagram of the housing of the utility model preferred embodiment.
Fig. 8 is the decomposing schematic representation of the housing of the utility model preferred embodiment.
Fig. 9 is the vertical view of housing shown in Figure 7.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Consult Fig. 1, the utility model provides a kind of electric heater unit for electric motor car, comprises housing 1 and is installed on several PTC electric heating elements 2 in the housing 1.With housing in the background technology similarly, described housing 1 comprises: be used for holding PTC electric heating element 2 heating chamber 11, be used for holding medium and the torus 12 that passes through for media flow, is communicated with torus 12 be used for medium supply in the described torus 12 import 13 and for the outlet 14 that medium is directed to outside the described torus 12; Described heating chamber 11 comprises several thermal troughs 160, and described PTC electric heating element 2 is installed in the described thermal trough 160, and described torus 12 arranges with respect to described thermal trough 160 sealings.
The structure of the PTC electric heating element of mentioning in the structure that main improvement of the present utility model is the PTC electric heating element and the background technology exists different so that PTC electric heating element 2 need not can good being installed in the thermal trough 160 by pressure elements.Consult Fig. 2-6, the PTC electric heating element 2 of the utility model preferred embodiment, the insulating barrier 23 that comprises PTC heating component 20, is located at first, second electrode assemblie of PTC heating component 20 both sides and is located at first, second electrode assemblie outside; PTC heating component 20 comprises at least one PTC element 27, described first, second electrode assemblie comprises contact electrode 21 and fixed electrode 22, described contact electrode 21 contacts with PTC heating component 20, and described fixed electrode 22 is between contact electrode 21 and insulating barrier 23; The fixed electrode 22 of described the first electrode assemblie and/or the second electrode assemblie is trapezoidal electrode, in the present embodiment, the fixed electrode 22 of described the first electrode assemblie and the second electrode assemblie is trapezoidal electrode, described trapezoidal electrode is vertical plane towards the medial surface of PTC heating component 20, is the inclined-plane towards the lateral surface of insulating barrier 23.The utility model does not adopt independent pressure elements, but at least one fixed electrode 22 is made into trapezoidal electrode, plays the effect of pressure elements, effectively conserve space, alleviate quality and play again simultaneously fixation; Especially, the heat that the PTC electric heating element produces can be directly passes to medium in the torus by thermal trough 160, and without pressure elements, thermal loss is less.
In preferred embodiment of the present utility model, described thermal trough 160 is the dovetail groove on inclined-plane for two sides, the fixed electrode 22 of the first electrode assemblie and the second electrode assemblie is made into trapezoidal electrode, be used for adapting to the thermal trough 160 with trapezoidal cross-section, PTC electric heating element 2 with this structure can embed thermal trough 160 easily, the pressure of suffered thermal trough 160 both sides can make PTC electric heating element 2 form good contacting with thermal trough 160 when embedding thermal trough 160, and, it is darker that PTC electric heating element 2 embeds thermal trough, the pressure at right angle that PTC electric heating element 2 is subject to is larger, more be not easy to be removed, need not pressure elements, can realize its fixation.Be understandable that, described thermal trough 160 also can be that a side is vertical plane, the another side is the dovetail groove on inclined-plane, at this moment, shape according to thermal trough 160, only the fixed electrode 22 with the first electrode assemblie or the second electrode assemblie is made into trapezoidal electrode, can make equally PTC electric heating element 2 form good contacting with thermal trough 160.
Shown in Fig. 2-4, specifically, the effect of described fixed electrode 22 is to connect the effect that power supply plays pressure elements simultaneously, by fixed electrode 22 is made into trapezoidal electrode, adapt to the thermal trough 160 with trapezoidal cross-section, need not pressure elements, namely PTC electric heating element 2 can be fixed in the thermal trough 160 and with thermal trough 160 and form good contacting.Described fixed electrode 22 is made by electric conducting material, preferably adopts the large metal of hardness to make, such as: can be aluminium, gold, stainless steel, aluminium alloy etc.The upper end of fixed electrode 22 is extended with for the leading-out terminal 221 that connects power supply, and leading-out terminal 221 can be fixed on the fixed electrode 22 by welding or riveting method.For guaranteeing between PTC heating component 20 and the fixed electrode 22 better the contact to be arranged, the lateral area of fixed electrode 22 is more than or equal to the lateral area of PTC heating component 20.In other embodiment of the present utility model, the area of fixed electrode 22 is greater than the lateral area of PTC heating component 20 under the preferable case, and extend to form up and/or down extension, between the extension of two fixed electrodes 22, locate to fill heat conduction embedding blob of viscose 25, described heat conduction embedding blob of viscose 25 can adopt organic silicon potting adhesive, polyurethane pouring sealant, epoxy resin embedding adhesive etc. to make, play the effect with 22 insulation of two fixed electrodes, avoid short circuit.
Further, continue to consult Fig. 2-4, as everyone knows, electric conductivity between the PTC element of PTC electric heating element 2 and the battery lead plate (being equivalent to fixed electrode), the contact resistance size is to the withstand voltage properties of electric heating module, and particularly fail safe, the reliability under long-time, the high voltage operation environment has a significant impact.In the prior art, the PTC element of PTC electric heating element 2 contacts with the direct rigidity of battery lead plate, the Presence of an interface gap, and the PTC element exists and makes tolerance when making moulding, the variable thickness of PTC element causes, when several PTC elements when battery lead plate is arranged, part PTC element not exclusively contacts with electrode, the way of contact of this direct contact is under high voltage environment, there is the risk that arc over PTC element occurs, causes short circuit.Thereby, in the utility model, preferably, between described PTC heating component 20 and fixed electrode 22, contact electrode 21 is set.Described contact electrode 21 adopts the conductive heat conducting material with larger elasticity of compression deformation to make; When being subject to ambient pressure elastic compression deformation can occur, can replenish the thickness deviation of PTC element, guarantee to form between PTC element and first, second electrode assemblie good contact.Described contact electrode 21 adopts the conductive heat conducting material with larger elasticity of compression deformation to make, and can be the conducting high polymers thing, for example: conductive rubber.Described contact electrode can also be made by elastic compression deflection larger metal and alloy, such as: metallic tin and alloy thereof, copper and alloy thereof etc.; Can also adopt comparatively soft electrically conductive graphite sheet to make, in brief, the conductive heat conducting material with larger elasticity of compression deformation all can be used for making contact electrode 21.Between described PTC heating component 20 and fixed electrode 22, contact electrode 21 is set, direct for fixed electrode 22 contacts with respect to the PTC element of rigidity, can reduce contact resistance; And do not affect interface heat transfer, so that the heat that the PTC element produces can conduct to fixed electrode 22 fully; And guarantee that the PTC element can use for a long time safely in high-pressure system.In a word, by described contact electrode 21 is set, promote the electric conductivity between PTC element and first, second electrode assemblie, reduce contact resistance, so that the PTC electric heating element has better fail safe, reliability under long-time, high voltage operation environment, be understandable that, adopt to comprise that the electrode assemblie structure of contact electrode is suitable for using under high voltage, be lower than 400V(DC) voltage under, can contact electrode be set and fixed electrode (trapezoidal electrode) only is set.
As shown in Figures 2 and 3, described PTC electric heating element 2 further comprises the insulating barrier 23 of being located at fixed electrode 22 outsides, the cross section of insulating barrier 23 becomes U-shaped, coats lateral surface and the bottom surface of described two fixed electrodes 22, with electric insulation fixed electrode 22 and thermal trough 160.And insulating barrier 23 is the insulating heat-conductive film, adopts insulation and the good material of thermal conductivity to make, and is unlikely to lose the heat of transmission, such as: adopt organic silicon rubber, acrylonitrile-butadiene rubber, ceramic insulating material etc. to make.
Skilled in the art will recognize that, need to insulate between battery lead plate and the thermal trough 160, the insulating method that the utility model adopts is for arranging insulating heat-conductive film 23 between fixed electrode and thermal trough 160, yet, when the PTC electric heating element embedded in the thermal trough 160, insulating heat-conductive film 23 suffered shearing forces damaged insulating heat-conductive film 23 more easily.Thereby in the preferred case, PTC electric heating element 2 of the present utility model also comprises synovial membrane 24, and described synovial membrane 24 is coated on the outer surface of insulating heat-conductive film 23.Described synovial membrane adopts higher, the ganoid material of intensity to be made, and can be organic polymer thin film or metallic film, such as: polyimide film, copper film etc.Adopt synovial membrane 24 to be coated on the outer surface of insulating heat-conductive film 23, and then with in the PTC electric heating element 2 embedding thermal troughs 160, can effectively protect insulating heat-conductive film 23 not to be damaged.
Those skilled in the art will appreciate that when PTC electric heating element 2 comprises several PTC elements several PTC elements are owing to existing variable thickness to cause or placement location is improper etc. that factor is difficult to fix; And because the PTC element is very sensitive to temperature, the heating effect of several PTC elements is not identical, and several PTC elements can influence each other if be in contact with one another when work, cause the performance of these several PTC elements to can not get bringing into play fully.In addition, the PTC element is used for electric motor car, requiring the PTC element is high pressure P TC element, in hyperbaric environment, phenomenon for fear of occurring the arcing discharge between two battery lead plates reaches safety standard, requires very strict to the spacing between two battery lead plates, yet increase by two spacings between the battery lead plate, can cause the volume of PTC element excessive.Another improvements of the present utility model are, described PTC heating component 20 comprises several PTC elements 27 and insulation fixed frame 26, described insulation fixed frame 26 is formed with several fixed cells 260, described several PTC elements 27 are individually fixed in described several fixed cells 260, the setting of described insulation fixed frame 26 can be isolated fixing described several PTC elements 27, so that accessing preferably, fix by described several PTC elements 27, and influencing each other when reducing 27 work of PTC element is so that the power of PTC element 27 is fully played.
Shown in Fig. 4-6, specifically, PTC heating component 20 is the devices that produce heat in the PTC electric heating element 2, preferably include at least two PTC elements 27, in the present embodiment, comprise six PTC elements 27, described PTC element 27 can adopt existing PTC element, be preferably ceramic PTC, have the conductive electrode (not shown) that arranges by modes such as spraying, printings in the relative both side surface of ceramic PTC, described conductive electrode is preferably silver electrode; In the utility model, the quantity of PTC element 27 that described PTC heating component 20 comprises can arrange according to the power of electric heater unit, to satisfy the needs of electric heater unit.
PTC electric heating element 2 of the present utility model also comprises insulation fixed frame 26, described insulation fixed frame 26 several PTC elements 27 on being installed on insulation fixed frame 26 form PTC heating component 20, be positioned between first, second electrode assemblie, so that several PTC elements 27 are fixed between insulation fixed frame 26 and first, second electrode assemblie preferably.Consult Fig. 4-6, described insulation fixed frame 26 comprises several the first divider 261 and several second dividers 262, described several the first divider 261 parallel interval settings, described several the second divider 262 parallel interval settings, and described the first divider 261 and the 262 square crossing settings of described the second divider; Described several fixed cells 260 are separated to form by described several first dividers 261 and several second dividers 262.As shown in Figure 6, in the present embodiment, insulation fixed frame 26 comprises two the first dividers 261, three the second dividers 262, described two the first distances that divider 261 parallels and the interval is certain, similarly, described three the second distances that divider 262 parallels and the interval is certain, and described two the first dividers 261 are perpendicular and crossing with three the second dividers 262 respectively; Described two the first dividers 261 and three the second dividers 262 form six fixed cells 260, can be used for installing six PTC elements 27.Be understandable that, can determine according to the quantity of the required PTC element 27 of PTC electric heating element 2 quantity of fixed cell 260, and then determine the first required divider 261, the quantity of the second divider 262, the insulation fixed frame 26 that formation is complementary, the insulation fixed frame 26 in being not limited to illustrate.
In the present embodiment, described two the first dividers 261 are along the Width setting of PTC element 27, in the preferred case, the spacing between two the first dividers 261 equals the width of PTC element 27, so that described PTC element 27 is located effectively at Width; Described three the second dividers 262 are along the length direction setting of PTC element 27, and in the preferred case, the spacing between three the second dividers 262 equals the length of PTC element 27, so that described PTC element 27 is located in the longitudinal direction effectively.It is worth mentioning that, separate by described the first divider 261 or the second divider 262 between two adjacent PTC elements 27.As shown in Figure 6, two adjacent on Width PTC elements 27 separate by the first divider 261, and two adjacent in the longitudinal direction PTC elements 27 separate by the second divider 262.By the PTC element 27 of the first divider 261 or the second divider 262 space between adjacent, influencing each other in the time of can reducing 27 work of PTC element improves the power of PTC element 27, so that the performance of PTC element 27 is fully played.
Such as Fig. 2 and shown in Figure 4, in the utility model, described insulation fixed frame 26 is fixed between two fixed electrodes 22, and can be by binding agent and contact electrode 21(or fixed electrode) between realize that bonding is fixing.Thereby the thickness of insulation fixed frame 26 equals the thickness of PTC element 27, be the thickness that the thickness of described several first dividers 261 and/or several the second dividers 262 equals PTC element 27, so that insulation fixed frame 26 is fixed between the contact electrode reliably and then reliable fixing PTC element, and do not affect PTC element and contact electrode 21(or fixed electrode) between form good contact; Described PTC element 27 is separated the location by described insulation fixed frame 26 on length, Width, be folded between two contact electrodes 21 at thickness direction, so that several PTC elements 27 are fixed effectively.
Skilled in the art will recognize that, when the PTC electric heating element is used for hyperbaric environment, for fear of the phenomenon that occurs the arcing discharge between first, second electrode assemblie, reach safety standard, very strict to the requirement of the spacing between first, second electrode assemblie, cause the volume of PTC electric heating element excessive.In the utility model, high temperature resistant by adopting, high voltage bearing material is made insulation fixed frame 26, can increase the withstand voltage properties between first, second electrode assemblie, reduce the arcing electric discharge phenomena between first, second electrode assemblie, avoid PTC element 27 breakdown.In the utility model, the employing conductive coefficient is 0.02W/(mK) ~ 5.0W/(mK) organic polymer, for example: adopt organosilicon or polyimides, make and have insulation fixed frame 26 high temperature resistant, high voltage performance.The preferred injection molding process of the moulding process of described insulation fixed frame 26; Can effectively improve the insulating properties between first, second electrode assemblie of high pressure P TC electric heating element 2 by above-mentioned insulation fixed frame 26, so that PTC electric heating element 2 of the present utility model can be applicable to hyperbaric environment, security performance is high.
The utility model also provides a kind of electric heater unit, described electric heater unit comprises housing 1 and several PTC electric heating elements 2, described housing 1 is formed with several thermal troughs 160, be used for holding medium and for the torus 12 of medium circulation, and being used for of being communicated with torus medium is supplied to the import 13 in the described torus and is used for medium is directed to the outer outlet 14 of described torus, described torus 12 is with respect to described thermal trough 160 sealing settings; Described PTC electric heating element 2 is aforesaid PTC electric heating element 2, and in the present embodiment, described thermal trough 160 is dovetail groove, and its two sides are the inclined-plane, and described PTC electric heating element 2 is installed in the described dovetail groove 160 and is suitable with described dovetail groove 160.Described PTC electric heating element 2 is embedded in the thermal trough 160, and the heat that produces is conducted to thermal trough 160.Thermal trough 160 not only plays the effect that medium and PTC electric heating element 160 are kept apart, and also plays the effect of conduction heat simultaneously, so thermal trough 160 adopts the metal with good heat conductive performance to make, and is preferably in the present embodiment aluminum or aluminum alloy.Thermal trough 160 has the cross section that is trapezoidal, can satisfy demoulding needs, is convenient to again install PTC electric heating element 2 and forms good contacting with PTC electric heating element 2.
Installation and the use procedure of the PTC electric heating element 2 of the utility model preferred embodiment, insulation fixed frame 26 is placed on the contact electrode 24 of the first electrode assemblie, then PTC element 27 is positioned over respectively in the fixed cell 260 of insulation fixed frame 26, and then with the second electrode assemblie place the insulation fixed frame 26 opposite side, and the heat conduction casting glue is filled by the edge between two electrode assemblies, then insulating heat-conductive film 23 is coated lateral surface and the bottom surface of two fixed electrodes 22, outer surface at insulating heat-conductive film 23 coats synovial membrane 24 again, forms PTC electric heating element 2.Above-mentioned mounted PTC electric heating element 2 is embedded in the thermal trough 160, during use, pass into medium from the import 13 of housing, and plugged, PTC element 27 begins heating, heat is passed to medium by battery lead plate 23, insulating barrier 23, thermal trough 160, and medium flows out from the outlet 14 of housing 1, and heat is taken away for the heating in the car, defrosting, demist etc.
As from the foregoing, at first, the fixed electrode of the electrode assemblie of the PTC electric heating element of the electric heater unit of the utility model preferred embodiment is trapezoidal electrode, described thermal trough is dovetail groove, its two sides are the inclined-plane, and described PTC electric heating element is installed in the described dovetail groove and is suitable with described dovetail groove; So that described PTC electric heating element need to can firmly not be installed in the thermal trough by fixture (pressure elements), the heat that the PTC electric heating element produces all can be directly be delivered to medium in the torus by thermal trough, thermal loss is less, and can effectively save the PTC electric heating element installing space, alleviate quality; So that adopt the heat efficiency of the electric heater unit of this PTC electric heating element effectively to be improved, can be used to preferably electric motor car heating, defrosting, demist and need the parts heating of thermal source for other.
Secondly, the electrode assemblie of the PTC electric heating element of the electric heater unit of the utility model preferred embodiment also comprises contact electrode, between fixed electrode and PTC element, contact resistance is set, direct for fixed electrode contacts with respect to the PTC element of rigidity, can reduce contact resistance; And do not affect interface heat transfer, so that the heat that the PTC element produces conducts to fixed electrode fully; And guarantee that the PTC element can use for a long time safely in high-pressure system.
Again, the PTC electric heating element of the utility model preferred embodiment also comprises synovial membrane, adopts synovial membrane to be coated on the outer surface of insulating heat-conductive film, and then the PTC electric heating element is embedded in the thermal trough, can effectively protect the insulating heat-conductive film not to be damaged.
In addition, the PTC electric heating element of the electric heater unit of the utility model preferred embodiment forms several fixed cells by the insulation fixed frame is set, several PTC elements are individually fixed in described several fixed cells, can so that these several PTC elements fixed preferably, and separate by several fixed cells between these several PTC elements, influence each other in the time of can reducing the work of PTC element, so that the heating properties of PTC element is fully played, heating power is effectively promoted, so that adopt the heat efficiency of the electric heater unit of this PTC electric heating element effectively to be improved, can be used to preferably the electric motor car heating, defrosting, demist and need the parts heating of thermal source for other.In addition, because described insulation fixed frame adopts high temperature resistant, high pressure resistant material to be made, increased the withstand voltage properties between the electrode assemblie, can reduce the phenomenon of two arcing discharges between the electrode assemblie, avoid the PTC element because the arcing discharge is breakdown, so that PTC electric heating element of the present utility model can be applicable to hyperbaric environment, security performance is high, guarantees that the PTC heating component can use in high-pressure system (electric motor car) for a long time safely.
Be understandable that the PTC electric heating element of electric heater unit of the present utility model is PTC electric heating element unlike the prior art, its housing then can adopt the structure of the housing similar to the housing of existing electric heater unit.But the import of the housing of the electric calorifie installation that background technology (CN100567843C) is mentioned and outlet are arranged on the place, opposite end of housing along its length, the length of the torus that partition wall separation housing forms is the length of housing, the recess that is used for maintenance PTC electric heating element also is the length direction setting along housing, when passing through torus, described medium centers on described recess in two side flow, medium flows through torus from the import of housing one side and flows out from the outlet of opposite side, the circulation path of medium in torus is straight line path, circulation path is short, the time of the heat of absorption PTC electric heating element is also shorter, medium can not absorb heat preferably, causes the heat efficiency of electric calorifie installation lower.Thereby, in a preferred embodiment of the invention, in order further to improve the heat efficiency of electric heater unit, the structure that another mainly improves the housing of mentioning in the structure that is housing 1 and the background technology of the present invention is different, so that the circulation path of medium in torus 12 is different from the circulation path of torus of the prior art, circulation path is longer.
Further, consult Fig. 1, Fig. 7-9, described housing 1 comprises the first housing 15, is installed on the second housing 16 on the first housing 15.Described the first housing 15 is the hollow cuboid of end face opening, adopt the insulation material to be made, comprise base plate 150 and four sidewalls that arrange around described base plate 150, and in the first housing 15, be formed with containing cavity 155, described four sidewalls are vertical or be approximately perpendicular to described base plate 150 and arrange, described four sidewalls comprise the first side wall 151, the second sidewall 152, the 3rd sidewall 153 and the 4th sidewall 154, wherein, two sidewalls that described the first side wall 151 and the second sidewall 152 are oppositely arranged for the length direction along the first housing 15, two sidewalls that the 3rd sidewall 153 and the 4th sidewall 154 are oppositely arranged for the Width along the first housing 15.Also be provided with on described the first housing 15 for medium being supplied to the import 13 in the housing and being used for medium is directed to the outer outlet 14 of described housing, be understandable that, for the circulation distance and the time that make medium longer, described import 13 and outlet 14 should be arranged at two positions relatively far away on the first housing 15, such as Fig. 7, shown in Figure 8, the two ends of described the second sidewall 152 are located in described import 13 and outlet 14; Be understandable that in other embodiment of the present utility model, described import 13 and outlet 14 also can be located at the two ends of the first side wall 151, perhaps import 13 and outlet 14 are arranged at respectively on the 3rd sidewall 153 and the 4th sidewall 154 (consulting Fig. 1).
Described the second housing 16 is installed on the first housing 15, the second housing 16 comprises and roughly is flat connecting wall 161, the partition wall 162 that is arranged with in the containing cavity 155 of the first housing 15 by connecting wall 161, and be separated to form and be connected in several thermal troughs 160 on the described connecting wall 161 by partition wall 162, described thermal trough 160 is used for installing PTC electric heating element 2, as mentioned above, described thermal trough 160 is dovetail groove, its at least one side is the inclined-plane, in the present embodiment, its two sides are the inclined-plane, and described PTC electric heating element 2 is installed in the described dovetail groove 160 and is suitable with described dovetail groove 160.Thermal trough 160 not only plays the effect that medium and PTC electric heating element are kept apart, and also plays the effect of conduction heat simultaneously, so thermal trough 160 made by the material with good heat conductive performance, such as metal, is preferably in the present embodiment aluminum or aluminum alloy.The openend of described thermal trough 160 is connected with described connecting wall 161, and thermal trough 160 extend in the containing cavity 155 of described the first housing 15.As shown in Figure 1, described several thermal troughs 160 are separated to form by partition wall 162, described several thermal trough 160 common heating chambers 11 that are used for heat medium that form.Described connecting wall 161, partition wall 162 are preferably one-body molded, all adopt the material of good heat conductive performance to make, to form reliable in structure, thermal trough 160 that heat conductivility is good.
Be understandable that described partition wall 162 is divided into the containing cavity 155 of the first housing 15 for the heating chamber 11 of placing the PTC electric heating element and for the torus 12 that holds medium and pass through for media flow.Consult Fig. 1, in the utility model, described torus 12 comprises several cycling elements 120, and described several cycling elements 120 are formed between partition wall 162 and the first housing 15, and is positioned at the below of connecting wall 161.Wherein, outermost cycling element 120 is formed between outermost thermal trough 160 and the first housing 15; Middle cycling element 120 is formed between adjacent two thermal troughs 160 and the first housing 15.Described thermal trough 160 for sealing arranges, causes damage to avoid medium to PTC electric heating element 2 with respect to described cycling element 120.
In the utility model, for described several cycling elements 120 are connected, the more important thing is, make long MEDIA FLOW path in order to form, the utility model by make several thermal troughs 160 respectively and the first side wall 151 of the first housing 15 or the second sidewall 152 between be formed with passage 17(and consult Fig. 9, what the label of Fig. 9 marked only is the position of passage 17, be understandable that, passage 17 is positioned at enclosure interior), so that several cycling elements 120 are connected by described passage 17 and the torus 12 in forming curves path, after flowing into from import 13, medium flows through torus 12 at torus 12 in the mode of circulation, circulation path is than linear flow path path length, medium flows through with curved path at above-mentioned torus 12, and medium flows around it around thermal trough 160, can effectively absorb the heat that thermal trough 160 interior PTC electric heating elements 2 produce, the time of absorbing heat is long, and heat absorption efficiency is high.In the preferred case, described several thermal troughs 160 comprise several the first thermal trough 1601 and several second thermal troughs 1602, described several first thermal troughs 1601 and several second thermal troughs 1602 are arranged alternately, wherein, the first thermal trough 1601 is connected with the first side wall 151, and and the second sidewall 152 between be formed with passage 17, the second thermal troughs 1602 and be connected with the second sidewall 152, and and the first side wall 151 between be formed with passage 17; So that described several cycling elements 120 are connected by described passage 17 and form S type torus 12.Mode with circulation after medium flows into from import 13 flows through S type torus 12 then from exporting 14 outflows, and S type torus 12 S-shaped circulation paths are imports 13 and export circulation path the longest between 14; Thereby, the electric heater unit of present embodiment adopts the housing with S type torus 12, medium flows through in the mode of above-mentioned torus 12 with circulation, the circulation flow path path length, and medium flows around it around thermal trough 160, can effectively absorb the heat that thermal trough 160 interior PTC electric heating elements 2 produce, and the time of absorbing heat is long, heat absorption efficiency is high, so that adopt the heat efficiency of the electric heater unit of this housing effectively to be improved.In the present embodiment, thermal trough 160 is nine, wherein, the first thermal trough 1601 is five, and the second thermal trough 1602 is four, is understandable that, the magnitude setting of described the first thermal trough, the second thermal trough can be determined according to the electric heater unit needs, to place the PTC electric heating element of suitable quantity.
In the utility model, preferably, described several thermal troughs 160 arrange in mode parallel to each other along the length direction of described the second housing 16, be that thermal trough 160 is along the Width setting of described the second housing 16, owing to be formed with passage between thermal trough 160 and the first side wall or the second sidewall, thereby its length is slightly less than the width of the second housing 16.Arranging rationally of the thermal trough 160 of this structure, magnitude setting is more, can better place PTC electric heating element 2, when described medium passes through torus 12, in the both sides of described thermal trough 160 or three sides of thermal trough 160 (comprising both sides and bottom) flow, more thermal trough 160 is set, can makes medium obtain more heat, improve the heat efficiency of electric heater unit.Be understandable that, described thermal trough 160 also can arrange in mode parallel to each other along the Width of the second housing 16, correspondingly, described the first side wall and the second sidewall two sidewalls for being oppositely arranged along the first housing Width, it is pointed out that to form and have longer circulation path (for example: the shell structure form of torus curved path) all can be used for the utility model.But compare, described thermal trough 160 arranges in mode parallel to each other along the length direction of described the second housing 16, and arranging of thermal trough 160 is rational in infrastructure, also is more convenient for installing PTC electric heating element 2.
In the utility model, preferably, described the second housing 16 extends upward and is provided with flange 163, described flange 163 places on the first housing 15, and the upper end of described the first housing 15 is provided with connector 156, correspondingly be provided with installing hole 166 on the flange 163 of the second housing 16, described connector 156 passes installing hole 166 and described the second housing 16 is installed on the first housing 15 and with described the first housing 15 is connected, junction at described the first housing 15 and the second housing 16 is provided with sealing ring 3, can not leak from the junction of the first housing 15 and the second housing 16 so that enter the medium of the first housing 15.
In the present embodiment, several thermal troughs 160 on described the second housing 16 stretch in the containing cavity 155 of described the first housing 15, correspondingly be provided with fixture block 157 in described the first housing 15, two adjacent fixture blocks 157 are formed for the fixedly installation portion of thermal trough 160, several thermal trough 160 correspondences on described the second housing 16 place described installation portion so that described the second housing 16 is more reliable with being connected of the first housing 15.In addition, in other preferred embodiment of the present utility model, can also be provided with fixture block at described several thermal troughs 160, the bottom surface that is arranged at thermal trough 160 of described fixture block and at least one side of thermal trough 160, fixture block width is set less than the width of thermal trough 160.Correspondingly be provided with draw-in groove in described the first housing 15, described draw-in groove correspondingly is formed at four sidewalls of described the first housing 15, the inboard of base plate 150, and described fixture block is installed in the described draw-in groove, so that described thermal trough 160 is fixed in the containing cavity 155.And the base plate 150 of the fixture block on the thermal trough 160 and the first housing 15, draw-in groove on the first side wall 151 or the second sidewall 152 is connected, wherein, fixture block on the first thermal trough 1601 and the first side wall 151, draw-in groove on the base plate 150 is connected, the junction gapless of described fixture block and described draw-in groove, only between described the first thermal trough 1601 and the second sidewall 152, be formed with passage, similarly, described the second thermal trough 1602 only and be formed with passage 17 between the first side wall 151, several cycling elements 120 are connected by described passage 17, thereby so that medium is interior when mobile at torus 12, flow by the passage 17 between thermal trough 160 and the first side wall 151 or the second sidewall 152, order flows in both sides or three sides (comprising the part bottom surface) of several thermal troughs 160 successively along several cycling elements 120, circulation path is longer, and medium flows around it around thermal trough 160, can effectively absorb the heat that thermal trough 160 interior PTC electric heating elements produce.
In the present embodiment, the size of described PTC electric heating element 2 is corresponding to the size of each thermal trough 160, be embedded with a PTC electric heating element 2 in each thermal trough 160, be understandable that, when the Width of described several thermal troughs 160 along housing arranges in mode parallel to each other, this moment, the length of thermal trough 160 was longer, and the PTC electric heating element more than two or two need to be installed in thermal trough 160, and described PTC electric heating element adopts PTC electric heating element of the present utility model.
The below introduces installation and the use procedure of electric heater unit of the present utility model, PTC electric heating element 2 is embedded in the thermal trough 160 by anchor clamps, and then the second housing 16 is installed to opening part and the sealed open of the first housing 15, several thermal troughs 160 are inserted in the containing cavity 155 of the first housing 15, form torus 12, during use, pass into medium from the import 13 of the first housing 15, and with PTC electric heating element 2 pluggeds, PTC element 27 begins heating, heat is by contact electrode 21, fixed electrode 22, insulating barrier 23, synovial membrane 24, thermal trough 160 is passed to medium, medium after obtaining heating in torus 12 flows out from the outlet 14 of the first housing 15, and heat is taken away for the heating in the car, defrosting, demist etc.
The utility model also provides a kind of electric motor car, comprise the air conditioning and heating system, described air conditioning and heating system comprises electric heater unit provided by the utility model, and the heat exchanger that is connected with electric heater unit, MEDIA FLOW is carried out the heat collection through electric heater unit, medium behind the absorbing heat enters heat exchanger, by heat exchanger thermal release is carried out heating in the car, defrosting, demist.
As from the foregoing, the housing of the electric heater unit of the utility model preferred embodiment comprises the first housing, is installed on the second housing in the first housing, heating chamber comprises several thermal troughs that the partition wall by the second housing is separated to form, and torus comprises several cycling elements that are formed between partition wall and the first housing; Several thermal troughs are formed with passage respectively and between the first side wall of the first housing or the second sidewall, several cycling elements are by the be connected torus (being preferably formed S type torus) in forming curves path of described passage, medium flows through in the mode of above-mentioned torus with circulation, circulation path is longer, contact area is large, and medium flows around it around thermal trough, can effectively absorb the heat that the PTC electric heating element produces in the thermal trough, the time of absorbing heat is long, heat absorption efficiency is high, further improves the heat efficiency of electric heater unit.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (16)
1. a PTC electric heating element is characterized in that, described PTC electric heating element comprises the PTC heating component, is located at first, second electrode assemblie of PTC heating component both sides, and the insulating barrier of being located at first, second electrode assemblie outside; Described first, second electrode assemblie comprises fixed electrode, and the fixed electrode of described the first electrode assemblie and/or the second electrode assemblie is trapezoidal electrode, and described trapezoidal electrode is vertical plane towards the medial surface of PTC heating component, is the inclined-plane towards the lateral surface of insulating barrier.
2. PTC electric heating element as claimed in claim 1 is characterized in that, described the first electrode assemblie is identical with the second electrode assemblie, and the fixed electrode of the first electrode assemblie and the second electrode assemblie is trapezoidal electrode.
3. PTC electric heating element as claimed in claim 1 is characterized in that, described first, second electrode assemblie also comprises contact electrode, and described contact electrode contacts with the PTC heating component, and described fixed electrode is between contact electrode and insulating barrier.
4. PTC electric heating element as claimed in claim 1 is characterized in that, described insulating barrier is the insulating heat-conductive film, and described insulating heat-conductive film is coated on lateral surface and the bottom surface of described first, second electrode assemblie.
5. PTC electric heating element as claimed in claim 1 is characterized in that, described PTC electric heating element also comprises synovial membrane, and described synovial membrane is coated on the outer surface of insulating heat-conductive film.
6. PTC electric heating element as claimed in claim 1 is characterized in that, the lateral area of described battery lead plate is greater than the lateral area of PTC heating component, and extends to form extension; Be filled with heat conduction embedding blob of viscose between the extension of described two battery lead plates.
7. PTC electric heating element as claimed in claim 1, it is characterized in that, described PTC heating component comprises insulation fixed frame and several PTC elements, and described insulation fixed frame is formed with several fixed cells, and described several PTC elements are individually fixed in described several fixed cells.
8. PTC electric heating element as claimed in claim 7, it is characterized in that, described insulation fixed frame comprises several first dividers and several second dividers, described several the first divider parallel interval arrange, described several the second divider parallel interval arrange, and described the first divider and described the second divider square crossing setting; Described PTC heating component comprises several PTC elements, and described several fixed cells are separated to form by described several first dividers and several second dividers.
9. PTC electric heating element as claimed in claim 8 is characterized in that, separates by described the first divider or the second divider between two adjacent PTC elements.
10. PTC electric heating element as claimed in claim 8 is characterized in that, described several first dividers are along the Width setting of PTC element, and the spacing between two adjacent the first dividers equals the width of PTC element; Described several second dividers are along the length direction setting of PTC element, and the spacing between two adjacent the second dividers equals the length of PTC element; The thickness of described several first dividers and/or several the second dividers equals the thickness of PTC element.
11. electric heater unit, comprise housing and several PTC electric heating elements, described housing is formed with several thermal troughs, be used for holding medium and medium supplied to the import in the described torus and be used for medium is directed to the outer outlet of described torus for the torus of medium circulation and being used for of being communicated with torus, and described torus is with respect to described thermal trough sealing setting; It is characterized in that, described PTC electric heating element is such as the described PTC electric heating element of claim 1-10 any one, described thermal trough is dovetail groove, and its at least one side is the inclined-plane, and described PTC electric heating element is installed in the described dovetail groove and is suitable with described dovetail groove.
12. electric heater unit as claimed in claim 11 is characterized in that, the two sides of described thermal trough are the inclined-plane; The lateral surface of described fixed electrode and the side of described thermal trough are suitable.
13. electric heater unit as claimed in claim 11, it is characterized in that, described housing comprises the first housing, is installed on the second housing on the first housing, described several thermal troughs are set on described the second housing, described several thermal troughs extend in described the first housing, form torus between described several thermal troughs and the first housing, described import and outlet are located on the first housing.
14. electric heater unit as claimed in claim 13 is characterized in that, described the second housing comprises connecting wall and partition wall, and described partition wall is separated to form described several thermal troughs, and the openend of described several thermal troughs is connected with described connecting wall; Described torus comprises several cycling elements, and described several cycling elements are formed between partition wall and the first housing; Described the first housing comprises the first side wall and the second sidewall, and described several thermal troughs are formed with passage respectively and between described the first side wall or the second sidewall, and described several cycling elements are connected by described passage.
15. electric heater unit as claimed in claim 14, it is characterized in that, described several thermal troughs comprise several first thermal troughs and several second thermal troughs, described several first thermal troughs and several second thermal troughs are arranged alternately, wherein, the first thermal trough is connected with the first side wall, and and the second sidewall between be formed with passage, the second thermal trough is connected with the second sidewall, and and the first side wall between be formed with passage.
16. an electric motor car comprises the air conditioning and heating system, it is characterized in that, described air conditioning and heating system comprises such as the described electric heater unit of claim 11-15 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220304667 CN202713643U (en) | 2012-06-27 | 2012-06-27 | PTC electrical heating element, electrical heating device, and electrombile |
| PCT/CN2013/078193 WO2014000666A1 (en) | 2012-06-27 | 2013-06-27 | Ptc electric heating assembly, electric heating device and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220304667 CN202713643U (en) | 2012-06-27 | 2012-06-27 | PTC electrical heating element, electrical heating device, and electrombile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202713643U true CN202713643U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220304667 Expired - Lifetime CN202713643U (en) | 2012-06-27 | 2012-06-27 | PTC electrical heating element, electrical heating device, and electrombile |
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| Country | Link |
|---|---|
| CN (1) | CN202713643U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014000666A1 (en) * | 2012-06-27 | 2014-01-03 | Shenzhen Byd Auto R&D Company Limited | Ptc electric heating assembly, electric heating device and electric vehicle |
| CN103517467A (en) * | 2012-06-27 | 2014-01-15 | 比亚迪股份有限公司 | PTC electrical heating element, electric heater unit and electric car |
| CN103517468A (en) * | 2012-06-27 | 2014-01-15 | 比亚迪股份有限公司 | PTC electrical heating element, electric heater unit and electric car |
-
2012
- 2012-06-27 CN CN 201220304667 patent/CN202713643U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014000666A1 (en) * | 2012-06-27 | 2014-01-03 | Shenzhen Byd Auto R&D Company Limited | Ptc electric heating assembly, electric heating device and electric vehicle |
| CN103517467A (en) * | 2012-06-27 | 2014-01-15 | 比亚迪股份有限公司 | PTC electrical heating element, electric heater unit and electric car |
| CN103517468A (en) * | 2012-06-27 | 2014-01-15 | 比亚迪股份有限公司 | PTC electrical heating element, electric heater unit and electric car |
| CN103517468B (en) * | 2012-06-27 | 2015-03-04 | 比亚迪股份有限公司 | PTC electrical heating element, electric heater unit and electric car |
| CN103517467B (en) * | 2012-06-27 | 2016-03-09 | 比亚迪股份有限公司 | A kind of PTC electric heating element, electric heater unit and electric motor car |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130130 |