CN202799195U - Thermal insulation module, electric heating device and electric vehicle - Google Patents
Thermal insulation module, electric heating device and electric vehicle Download PDFInfo
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- CN202799195U CN202799195U CN 201220339739 CN201220339739U CN202799195U CN 202799195 U CN202799195 U CN 202799195U CN 201220339739 CN201220339739 CN 201220339739 CN 201220339739 U CN201220339739 U CN 201220339739U CN 202799195 U CN202799195 U CN 202799195U
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Abstract
The utility model provides a thermal insulation module which is used for an electric heating device. The thermal insulation module is characterized in that the thermal insulation module comprises a thermal conductive rubber block, a thermal insulation foam block which is arranged above the thermal conductive rubber block, and a thermal insulation rubber block which is bonded between the thermal conductive rubber block and the thermal insulation foam block. The utility model further relates to the electric heating device using the thermal insulation module and an electric vehicle. According to the electric heating device provided by the utility model, the thermal insulation module is arranged between a number of PTC electric heating elements and a circuit board; the thermal insulation module can significantly reduce the temperature of the internal environment of the electric heating device; the environment temperature is about 60 DEG C at long time work and is below the normal work temperature of the electronic elements on the circuit board (about 80 DEG C); and the electronic elements on the circuit board are effectively protected, thus the electric heating device has the advantages of long service life and stable performance.
Description
Technical field
The utility model relates to the heater field, relates in particular to a kind of heat insulation module 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.Heating element is preferably the PTC electric heating element and is maintained at by clamping force in the recess of partition wall formation; Consult the accompanying drawing 5-7 of the disclosure document, described electric calorifie installation also comprises insulation board, the first printed circuit board (PCB) and the second printed circuit board (PCB) that is installed on the housing, and described insulation board is made by electrical insulating material; Described the first printed circuit board (PCB) is used for independently electric heating element combination in groups, and the mode that purpose is to organize is controlled electric heating element; Described the second printed circuit board (PCB) is electrically connected outside power supply terminal and signal terminal, thus the work of control PTC electric heating element.Yet, there is following problems in this electric calorifie installation: pass through air heat insulation between PTC electric heating element and the printed circuit board (PCB), although the thermal conductivity of air is very poor, but can not stop completely the heat of PTC electric heating element upwards to transmit, cause the ambient temperature of electric calorifie installation inside very high, even surpass the work ceiling temperature of the electronic devices and components on the printed circuit board (PCB); Especially when this PTC electric calorifie installation is used for electric motor car, the heat that electric motor car needs is many, the power of corresponding PTC electric calorifie installation is just larger, when high power PTC electric calorifie installation is worked, the up and down left and right directions transmission of heat that the PTC electric heating element produces, wherein, to the left and right and the heat of lower direction transmission can take away by the heat transmission liquid that is cooled, it is inevitable that but heat upwards transmits, when power surpassed 5000W, the heat that upwards transmits was very large, and temperature is very high, surpass the temperature that electronic devices and components can work on the printed circuit board (PCB), cause the electronic devices and components on the printed circuit board (PCB) to damage.
Summary of the invention
The utility model is in order to pass through air heat insulation between the PTC electric heating element that solves existing electric heater unit and the printed circuit board (PCB), can not stop completely the heat of PTC electric heating element upwards to transmit, cause the ambient temperature of PTC electric heater unit inside very high, even surpass the technical problem of the work ceiling temperature of the electronic devices and components on the printed circuit board (PCB).
For achieving the above object, the utility model provides a kind of heat insulation module for electric heater unit, and described heat insulation module comprises the heat conduction blob of viscose, is located at the heat insulation foam piece of heat conduction blob of viscose top, and is bonded in the heat insulation blob of viscose between heat conduction blob of viscose and the heat insulation foam piece.
In described heat insulation module, preferably, the thickness of described heat insulation module is 10mm ± 1 mm, and wherein, the thickness of described heat conduction blob of viscose is 2mm ± 0.5 mm; The thickness of described heat insulation foam piece is 6mm ± 1mm; The thickness of described heat insulation blob of viscose is 2mm ± 0.5 mm.
In described heat insulation module, preferably, described heat conduction blob of viscose is silicon rubber piece or epoxy resin block; Described heat insulation foam piece is polyurethane foam material piece or silicon rubber expanded material piece; Described heat insulation blob of viscose is the silicon gel piece.
The utility model further provides a kind of electric heater unit, comprise housing, several PTC electric heating elements, and circuit board, described housing is formed with several thermal troughs, the torus that is used for holding medium and supplies the medium circulation, and being used for of being communicated with torus supplies to the import in the described torus with medium and is used for medium is directed to the outer outlet of described torus, described torus arranges with respect to described thermal trough sealing, described several PTC electric heating elements are installed in the described thermal trough, described circuit board is installed on the top of described housing and is electrically connected with described several PTC electric heating elements, and described circuit board is provided with the electronic devices and components for the work of control electric heater unit; Wherein, described electric heater unit also comprises heat insulation module, described heat insulation module is installed on the described housing, and between described several PTC electric heating elements and circuit board, described heat insulation module comprises the heat conduction blob of viscose, is located at the heat insulation foam piece of heat conduction blob of viscose top, and is bonded in the heat insulation blob of viscose between heat conduction blob of viscose and the heat insulation foam piece.
In described electric heater unit, preferably, the thickness of described heat insulation module is 10mm ± 1 mm, and wherein, the thickness of described heat conduction blob of viscose is 2mm ± 0.5 mm; The thickness of described heat insulation foam piece is 6mm ± 1mm; The thickness of described heat insulation blob of viscose is 2mm ± 0.5 mm.
In described electric heater unit, preferably, described heat conduction blob of viscose is silicon rubber piece or epoxy resin block; Described heat insulation foam piece is polyurethane foam material piece or silicon rubber expanded material piece; Described heat insulation blob of viscose is the silicon gel piece.
In described electric heater unit, preferably, described electric heater unit also comprises loam cake, is formed with control cabinet between described loam cake and the described heat insulation blob of viscose, and described circuit board is arranged in described control cabinet; Described circuit board comprises control board, and described electronic devices and components are installed on the described control board.
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, the junction of described the first housing and the second housing is provided with sealing ring.
In described electric heater unit, preferably, 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 upper end of described fixed electrode is extended with leading-out terminal, and described leading-out terminal is electrically connected with described circuit board.
In described electric heater unit, preferably, 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 electric heater unit, 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.
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.
Electric heater unit of the present utility model arranges heat insulation module between described several PTC electric heating elements and circuit board, described heat insulation module comprises the heat conduction blob of viscose, is located at the heat insulation foam piece of heat conduction blob of viscose top, and is bonded in the heat insulation blob of viscose between heat conduction blob of viscose and the heat insulation foam piece; Wherein, described heat conduction blob of viscose can be delivered to the heat that the PTC electric heating element upwards transmits on the PTC electric heating element again, and then heat is taken away by cooling fluid; The heat that described heat insulation foam piece can stop the PTC electric heating element to produce upwards transmits; Described heat insulation blob of viscose is used for bonding heat conduction blob of viscose and heat insulation foam piece, can effectively fix heat insulation foam piece, and can stop the heat that transmits up by the heat conduction blob of viscose further upwards to transmit.By between described several PTC electric heating elements and circuit board, heat insulation module being set; the interior environment temperature of electric heater unit is obviously reduced; ambient temperature is about 60 ℃ when working long hours; be lower than the normal working temperature (being about 80 ℃) of electronic devices and components on the circuit board; electronic devices and components on the protective circuit plate effectively; so that the long service life of electric heater unit, stable performance, can be used to better electric motor car heating, defrosting, demist and need the parts heating of thermal source for other.
Description of drawings
Fig. 1 is the combination schematic diagram of the electric heater unit of the utility model preferred embodiment.
Fig. 2 is the decomposed schematic diagram of the electric heater unit of the utility model preferred embodiment.
Fig. 2 is the complete decomposing schematic representation of the electric heater unit of the utility model preferred embodiment.
Fig. 4 is the housing of the utility model preferred embodiment and the cutaway view of PTC electric heating element.
Fig. 5 is the cutaway view of the PTC electric heating element shown in Fig. 4.
Fig. 6 is that PTC electric heating element shown in Figure 5 is installed on the partial sectional view in the thermal trough of housing.
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. 1-3, the utility model provides a kind of electric heater unit for electric motor car, the circuit board 3 that comprises housing 1, is installed on several PTC electric heating elements 2 in the housing 1 and is installed on housing 1 top.Consult Fig. 4, 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 medium (for example: cooling fluid) be directed to outlet 14 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; Described circuit board 3 is installed on housing 1 top and is electrically connected with described several PTC electric heating elements 2, and described circuit board 3 is provided with the electronic devices and components for the work of control electric heater unit, for example: the IGBT module.
In a preferred embodiment, described electric heater unit also comprises loam cake 5, is formed with control cabinet in the described loam cake 5, and described circuit board 3 is arranged in described control cabinet; Described circuit board 3 comprises control board, and control board is used for installing electronic devices and components, and (for example: the IGBT module) be installed on the described control board, described electronic devices and components are core components of circuit control to described electronic devices and components, and temperature is lower just safer; In the described control cabinet supporting bracket can also be set further, supporting bracket is between control board and heat insulation module, be for the holding components of supporting control board, prevent circuit board at the vehicle traveling process moderately gusty air, the electronic devices and components that cause control board come off or are loosening.Circuit board of the present utility model can adopt circuit board of the prior art, and its control board, electronic devices and components and circuit control section all can pass through existing techniques in realizing.
Main improvement of the present utility model is: described electric heater unit also comprises heat insulation module 4, described heat insulation module 4 is installed on the described housing, and between described several PTC electric heating elements 2 and circuit board 3, described heat insulation module 4 comprises heat conduction blob of viscose 41, is located at the heat insulation foam piece 43 of heat conduction blob of viscose 41 tops, and is bonded in the heat insulation blob of viscose 42 between heat conduction blob of viscose 41 and the heat insulation foam piece 43.Electric heater unit of the present utility model is by arranging heat insulation module 4 between described several PTC electric heating elements 2 and circuit board 3, described heat insulation module 4 comprises heat conduction blob of viscose 41, is located at the heat insulation foam piece 43 of heat conduction blob of viscose 41 tops, and is bonded in the heat insulation blob of viscose 42 between heat conduction blob of viscose 41 and the heat insulation foam piece 43; Wherein, described heat conduction blob of viscose 41 can be delivered to the heat that PTC electric heating element 2 upwards transmits on the PTC electric heating element 2 again, and then heat is taken away by cooling fluid; The heat that described heat insulation foam piece 43 can stop PTC electric heating element 2 to produce upwards transmits; Described heat insulation blob of viscose 42 is used for bonding heat conduction blob of viscose 41 and heat insulation foam piece 43, can effectively fix heat insulation foam piece 43, and can stop the heat that comes up by 41 transmission of heat conduction blob of viscose further upwards to transmit.By between described several PTC electric heating elements 2 and circuit board 3, heat insulation module 4 being set; the interior environment temperature of electric heater unit is obviously reduced; ambient temperature is about 60 ℃ when working long hours; be lower than the normal working temperature (being about 80 ℃) of electronic devices and components on the circuit board 3, the protective circuit plate 3 effectively.
Specifically, described heat insulation module 4 comprises three-decker, and thickness is 10mm ± 1mm.Wherein, ground floor is heat conduction blob of viscose 41, the thickness of described heat conduction blob of viscose 41 is 2mm ± 0.5mm, the employing conductive coefficient is at least 1.5W/m.k, the heat-conducting glue of heatproof more than 280 ℃ made, the conductive coefficient of described heat-conducting glue is preferably 1.5W/(mK) ~ 3.0W/(mK), tolerate 280 ℃ ~ 300 ℃ temperature; For example: described heat conduction blob of viscose 41 can be made by high temperature silicon rubber or epoxide resin material; Described heat conduction blob of viscose 41 can be delivered to the PTC electric heating element again with the heat that PTC electric heating element 2 upwards transmits, and then heat is taken away by the cooling fluid in the torus 12 of housing 1; The 3rd layer is heat insulation foam piece 43, described heat insulation foam piece 43 thickness are 6mm ± 1 mm, adopt the very poor adiabatic foam of heat conductivility to make, the preferred adiabatic foam that adopts conductive coefficient to be up at least 200 ℃ of 0.15W/m.k, heatproof is made, more preferably the conductive coefficient of adiabatic foam is 0.05 W/(mK) ~ 0.15W/(mK), tolerate 200 ℃ ~ 300 ℃ temperature; Described adiabatic foam can be by closed cell foamed material, such as: polyurethane foam material or silicon rubber expanded material etc. is made, and is used for stoping the heat of PTC electric heating element upwards to be delivered to circuit board 3.The second layer is arranged between ground floor and the 3rd layer, be heat insulation blob of viscose 42, the thickness of described heat insulation blob of viscose 42 is 2mm ± 0.5 mm, adopt that heat conductivility is very poor, elasticity preferably colloidal materials make, the preferred colloidal materials that adopts conductive coefficient to be up at least 200 ℃ of 0.15W/m.k, heatproof is made, more preferably the conductive coefficient of heat insulation blob of viscose 42 is 0.05 W/(mK) ~ 0.15W/(mK), tolerate 200 ℃ ~ 300 ℃ temperature; For example: described colloid can be the silicon gel, and described heat insulation blob of viscose 42 has three kinds of effects: one, be used for bonding heat conduction blob of viscose 41 and heat insulation foam piece 43, with fixing heat insulation foam; Two, prevention is caught the heat that comes by ground floor heat conduction blob of viscose 41 and further upwards is delivered to circuit board 3; Three, have certain cushioning effect, because that electric motor car when travelling under relatively poor road conditions, vibrate is stronger, heat insulation blob of viscose 42 elasticity of this layer are better, and the elastic deformation amount is large, can effectively reduce the possibility of PTC electric heating element and 43 damages of heat insulation foam piece.
Be understandable that; the main distinction of electric heater unit of the present utility model and existing electric heater unit is by heat insulation module 4 is set; make electric heater unit of the present utility model be different from electric heater unit of the prior art; the interior environment temperature of electric heater unit is obviously reduced; ambient temperature is about 60 ℃ when working long hours; be lower than the normal working temperature (being about 80 ℃) of the electronic devices and components on the circuit board 3, effectively the electronic devices and components on the protective circuit plate 3.The PTC electric heating element 2 of electric heater unit then can adopt existing PTC electric heating element 2.But in preferred embodiment of the present utility model, in order further to improve the heat that PTC electric heating element 2 passes to the medium in the torus, preferably adopt PTC electric heating element 2 of the present utility model.
Consult Fig. 5-6, 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 24, 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 PTC electric heating element 2 produces can be directly passes to medium in the torus by thermal trough 160, and without pressure elements, thermal loss is less; And so that the more going down of heat to the medium in the torus, reduces the heat that upwards transmits.
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 160, 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.
As shown in Figure 3, 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, is used for being electrically connected with described circuit board 3, to control 2 work of PTC electric heating elements by circuit board 3.In addition, 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.
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 24, guarantee to form between PTC element 24 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 21 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 PTC electric heating element 2 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 21 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.
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 so that the heat that the PTC electric heating element the produces medium of going down in the torus preferably; reduce the heat that upwards transmits; so that adopt the heat efficiency of the electric heater unit of this PTC electric heating element effectively to be improved, electronic devices and components on the protective circuit plate effectively simultaneously.
The utility model also provides a kind of electric heater unit, the circuit board 3 that described electric heater unit comprises housing 1, is installed on several PTC electric heating elements 2 in the housing 1 and is installed on housing 1 top.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; Described circuit board 3 is installed on housing 1 top and is electrically connected with described several PTC electric heating elements 2, and described circuit board 3 is provided with the electronic devices and components for the work of control electric heater unit.And, described electric heater unit also comprises aforesaid heat insulation module 4, described heat insulation module 4 is installed on the described housing 1, and between described several PTC electric heating elements 2 and circuit board 3, described heat insulation module 4 comprises heat conduction blob of viscose 41, is located at the heat insulation foam piece 43 of heat conduction blob of viscose 41 tops, and is bonded in the heat insulation blob of viscose 42 between heat conduction blob of viscose 41 and the heat insulation foam piece 43.Described heat insulation module 4 is the electronic devices and components on the protective circuit plate 3 effectively, so that the long service life of electric heater unit, stable performance, can be used to better electric motor car heating, defrosting, demist and need the parts heating of thermal source for other.
In a preferred embodiment, electric heater unit of the present utility model also comprises loam cake 5, is formed with control cabinet in the described loam cake 5, and described circuit board 3 is arranged in described control cabinet; Described circuit board 3 comprises control board, and described electronic devices and components are installed on the described control board; Circuit board of the present utility model can adopt circuit board of the prior art, and its control board, electronic devices and components and circuit control section all can pass through existing techniques in realizing.
The installation of the electric heater unit of the utility model preferred embodiment and use procedure are bonded in heat insulation blob of viscose 42 between heat conduction blob of viscose 41 and the heat insulation foam piece 43, obtain heat insulation module 4; Then several PTC electric heating elements 2 are embedded in the thermal trough 160 of housing 1 by anchor clamps successively, again heat insulation module 4 is installed on the top of housing 1, mounting circuit boards 3 on heat insulation module 4 again, wherein, the heat conduction blob of viscose 41 of heat insulation module 4 is placed near PTC electric heating element 2, and the heat insulation foam piece 43 of heat insulation module 4 is placed near circuit board 3; And then loam cake 5 is installed above circuit board 3, and loam cake 5 is fixed on the housing 1, finish the installation of electric heater unit.During use; pass into medium from the import 13 of housing 15; and with PTC electric heating element 2 pluggeds; PTC electric heating element 2 begins heating; heat upwards; lower; left; right is transmitted; wherein; left; the heat of right and lower direction transmission is taken away by the medium (cooling fluid) in the torus 12 of the housing 1 of flowing through; the heat that upward direction is transmitted is because the setting of heat insulation module 4; by heat insulation foam piece 43; heat insulation blob of viscose 42 preventions are caught the heat that comes by ground floor heat conduction blob of viscose 41 and further upwards are delivered to circuit board 3; so that it is difficult to the upward direction transmission; and by heat conduction blob of viscose 41 heat that PTC electric heating element 2 upwards transmits is delivered to PTC electric heating element 2 again; then heat is taken away by the cooling fluid in the torus 12 of housing 1 again; electronic devices and components on the protective circuit plate 3 effectively; so that the long service life of electric heater unit; stable performance; can make again medium (cooling fluid) take away more heat; reduce thermal loss, so that the heat efficiency of electric heater unit is improved.
In addition, housing of the present utility model can adopt the structure of the housing similar to the housing of existing electric heater unit.But in preferred embodiment of the present utility model, in order further to improve the heat efficiency of electric heater unit, the structure of housing that another mainly improves the electric calorifie installation of mentioning in the structure that is housing 1 and the background technology of the present utility model 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, can effectively take away the heat that PTC electric heating element 2 produces.
Further, consult Fig. 4, 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.
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 2 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 4, 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 PTC electric heating element 2 and for the torus 12 that holds medium and pass through for media flow.Consult Fig. 4, 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 addition, consult Fig. 8, be provided with sealing ring 17 in the junction of described the first housing 15 and the second housing 16, 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.
The below introduces installation and the use procedure of the electric heater unit of the utility model preferred embodiment, PTC electric heating element 2 is embedded in the thermal trough 160 by anchor clamps, and then the second housing 16 is installed in 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 electric heating element 2 begins heating, heat is passed to medium by thermal trough 160, and the medium after obtaining heating in torus 12 flows out from the outlet 14 of the first housing 16, and heat is taken away for the heating in the car, defrosting, demist etc.
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 improve the heat efficiency of electric heater unit; the heat that can also reduce the generation of PTC electric heating element simultaneously upwards is delivered to circuit board; electronic devices and components on the protective circuit plate effectively are so that the long service life of electric heater unit; stable performance.
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; Other parts of described heat exchanger and air conditioning and heating system all can pass through existing techniques in realizing, do not do at this and give unnecessary details.
Performance test
One, power test
1, test principle: high voltage source offers PTC electric heater unit rated voltage, shows the real-time current value.PTC electric heater unit under the rated voltage produces heat, the medium (circulating cooling liquid) of heating PTC electric heater unit internal circulation; Then circulating cooling liquid is taken away heat by the wind that blower fan produces by heat exchanger (blower fan) time, and air themperature raises, and coolant temperature reduces.Reduce the cooling fluid of temperature and get back to PTC electric heater unit inside by circulating line again.The temperature of each fluid (cooling fluid and heated air) is by the data acquisition system collection;
2, test parameter: voltage: 400VDC; Circulating cooling flow quantity: 10L/min; Air quantity: 450m
3/ h (laboratory use blower fan model corresponding voltage value be 12VDC); System temperature: 23 ± 5 ℃;
1), PTC electric heater unit experiment exemplar is installed in coolant circulation system 3, testing procedure:; 2), the turn-on data acquisition system, gather fluid and environment real time temperature; 3), open fan power, the control compressor flow is 450m3/h; 4), the open water pumping source, control liquid circulation flow is 10L/min; 5), the temperature stabilization of cooling fluid to be recycled is at room temperature (23 ± 5 ℃); 6), behind the temperature stabilization, open PTC electric heater unit high voltage source, setting voltage is input as 400VDC; 7), read high voltage source real-time current value, record inrush current value (maximum that electric power starting 10s left and right sides electric current reaches, i.e. inrush current value); 8), when change in the current value 5min less than 0.05A the time, record stable electrical flow valuve stops test.During on off test, the voltage of PTC electric heater unit is 600VDC, by open circuit and the closure of power controling box control high-tension line, other parameter constant.
Two, temperature parameter test
The temperature parameter test cooperates power detection and burn-in test to carry out synchronously, J type temperature sensor is arranged in control board in the control cabinet, control board top 2mm, PTC electric heating element electrode leads to client and be used for the fixedly parts such as supporting bracket of control board, pass through data acquisition unit, gather at any time the variations in temperature of each several part, test result sees Table 2.
Three, specimen and test result
Make electric heater unit sample A1 according to preferred embodiment of the present utility model, the structure of sample A1 is shown in Fig. 1-9, wherein, to adopt conductive coefficients be that the heat-conducting glue of 280 ℃ of 1.5W/m.k, heatproof is made to the heat conduction blob of viscose 41 of the heat insulation module 4 of described electric heater unit sample A1; It is that the heat insulation foam of 200 ℃ of 0.15W/m.k, heatproof is made that heat insulation foam piece 43 adopts conductive coefficients; It is that the silicon gel of 200 ℃ of 0.15W/m.k, heatproof is made that heat insulation blob of viscose 42 adopts conductive coefficients.
Comparative Examples 1
Adopt PTC electrical heating elements, housing and the circuit board identical with embodiment 1, distinguish and only be heat insulation module is not set, be made into the electric heater unit sample B1 of Comparative Examples 1.
Comparative Examples 2
With Ai Beihe heater of the prior art 2 electric heater unit sample B2 as a comparison case.
Adopt the method for testing of above-mentioned power test and temperature parameter test and test condition that the electric heater unit A1 of embodiment 1 and Comparative Examples 1,2 electric heater unit sample B1, B2 are tested, test result sees Table 1 and table 2.
Table 1
|
| Embodiment | 1 | Comparative Examples 1 | Comparative Examples 2 |
| Maximum current I max/A | 16.8 A | 17.9 A | 19A | |
| Stabling current I Stable/A | 10.9 A | 10.6 A | 9.8A | |
| Power P/W | 4360W | 4240W | 3920W |
Table 2
| Heater | The IGBT temperature | The control cabinet temperature | The supporting bracket temperature | The control board temperature |
The electrode leads to client temperature of PTC electric |
| Embodiment | |||||
| 1 | 71.5℃ | 50.1℃ | 65.7℃ | 51.8℃ | 95.1℃ |
| Comparative Examples 1 | 77.8℃ | 60.1℃ | 67.3℃ | 62.9℃ | 101.6℃ |
| Comparative Examples 2 | 74.7℃ | 60.8℃ | 70.8℃ | 82.9℃ | 115.6℃ |
Can find out that from the test result of table 1 the electric heater unit sample A1 of embodiment 1 has higher performance number compared to Comparative Examples 1,2 electric heater unit sample B1, B2, proves absolutely that electric heater unit of the present utility model has higher thermal power.Test result by table 2 can be known, under the same condition of work, the temperature of the each several part of the electric heater unit sample A1 of embodiment 1 all is lower than Comparative Examples 1,2 electric heater unit sample B1, B2, temperature is lower, the coefficient of safety of electric heater unit is higher, and especially the ambient temperature of control cabinet is particularly important, and ambient temperature is lower, the temperature of the electronic devices and components on the control board is just lower, and the life-span of electronic devices and components is just longer.The test result of associative list 1 and table 2 can be found out; the interior environment temperature of electric heater unit of the present utility model obviously reduces; when working long hours; about 60 ℃ of ambient temperature; 80 ℃ of the normal working temperatures of the electronic devices and components on the circuit board 3; electronic devices and components on the protective circuit plate 3 effectively; so that the long service life of electric heater unit; stable performance; and the power of the electric heater unit of the utility model preferred embodiment is effectively promoted, and can be used to better the electric motor car heating; defrosting; demist and need the parts heating of thermal source for other.
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 (14)
1. a heat insulation module that is used for electric heater unit is characterized in that, described heat insulation module comprises the heat conduction blob of viscose, is located at the heat insulation foam piece of heat conduction blob of viscose top, and is bonded in the heat insulation blob of viscose between heat conduction blob of viscose and the heat insulation foam piece.
2. heat insulation module as claimed in claim 1 is characterized in that, the thickness of described heat insulation module is 10mm ± 1 mm, and wherein, the thickness of described heat conduction blob of viscose is 2mm ± 0.5 mm; The thickness of described heat insulation foam piece is 6mm ± 1mm; The thickness of described heat insulation blob of viscose is 2mm ± 0.5 mm.
3. heat insulation module as claimed in claim 1 or 2 is characterized in that, described heat conduction blob of viscose is silicon rubber piece or epoxy resin block; Described heat insulation foam piece is polyurethane foam material piece or silicon rubber expanded material piece; Described heat insulation blob of viscose is the silicon gel piece.
4. electric heater unit, comprise housing, several PTC electric heating elements, and circuit board, described housing is formed with several thermal troughs, the torus that is used for holding medium and supplies the medium circulation, and being used for of being communicated with torus supplies to the import in the described torus with medium and is used for medium is directed to the outer outlet of described torus, described torus arranges with respect to described thermal trough sealing, described several PTC electric heating elements are installed in the described thermal trough, described circuit board is installed on the top of described housing and is electrically connected with described several PTC electric heating elements, and described circuit board is provided with the electronic devices and components for the work of control electric heater unit; It is characterized in that, described electric heater unit also comprises heat insulation module, described heat insulation module is installed on the described housing, and between described several PTC electric heating elements and circuit board, described heat insulation module comprises the heat conduction blob of viscose, is located at the heat insulation foam piece of heat conduction blob of viscose top, and is bonded in the heat insulation blob of viscose between heat conduction blob of viscose and the heat insulation foam piece.
5. electric heater unit as claimed in claim 4 is characterized in that, the thickness of described heat insulation module is 10mm ± 1 mm, and wherein, the thickness of described heat conduction blob of viscose is 2mm ± 0.5 mm; The thickness of described heat insulation foam piece is 6mm ± 1mm; The thickness of described heat insulation blob of viscose is 2mm ± 0.5 mm.
6. such as claim 4 or 5 described electric heater units, it is characterized in that described heat conduction blob of viscose is silicon rubber piece or epoxy resin block; Described heat insulation foam piece is polyurethane foam material piece or silicon rubber expanded material piece; Described heat insulation blob of viscose is the silicon gel piece.
7. electric heater unit as claimed in claim 4 is characterized in that, described electric heater unit also comprises loam cake, is formed with control cabinet between described loam cake and the described heat insulation blob of viscose, and described circuit board is arranged in described control cabinet; Described circuit board comprises control board, and described electronic devices and components are installed on the described control board.
8. electric heater unit as claimed in claim 4, 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.
9. electric heater unit as claimed in claim 8 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.
10. electric heater unit as claimed in claim 8 is characterized in that, the junction of described the first housing and the second housing is provided with sealing ring.
11. electric heater unit as claimed in claim 4 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 upper end of described fixed electrode is extended with leading-out terminal, and described leading-out terminal is electrically connected with described circuit board.
12. electric heater unit as claimed in claim 11, it is characterized in that, 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.
13. electric heater unit as claimed in claim 11 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.
14. 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 4-13 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220339739 CN202799195U (en) | 2012-07-13 | 2012-07-13 | Thermal insulation module, electric heating device and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220339739 CN202799195U (en) | 2012-07-13 | 2012-07-13 | Thermal insulation module, electric heating device and electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN202799195U true CN202799195U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220339739 Expired - Lifetime CN202799195U (en) | 2012-07-13 | 2012-07-13 | Thermal insulation module, electric heating device and electric vehicle |
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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 |
| CN103542525A (en) * | 2012-07-13 | 2014-01-29 | 比亚迪股份有限公司 | Heat insulation module, electric heating device and electric vehicle |
| CN106369808A (en) * | 2016-11-09 | 2017-02-01 | 艾欧史密斯(中国)热水器有限公司 | Balance type gas-fired water heating device |
| CN106985633A (en) * | 2017-03-03 | 2017-07-28 | 镇江海姆霍兹传热传动系统有限公司 | New-energy automobile electric heater unit |
| CN109059307A (en) * | 2018-08-21 | 2018-12-21 | 芜湖黑特新能源汽车科技有限公司 | A kind of heating packet power conduction compoboard with temperature sensor |
-
2012
- 2012-07-13 CN CN 201220339739 patent/CN202799195U/en not_active Expired - Lifetime
Cited By (7)
| 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 |
| CN103542525A (en) * | 2012-07-13 | 2014-01-29 | 比亚迪股份有限公司 | Heat insulation module, electric heating device and electric vehicle |
| CN103542525B (en) * | 2012-07-13 | 2015-11-25 | 比亚迪股份有限公司 | A kind of electric heater unit and electric motor car |
| CN106369808A (en) * | 2016-11-09 | 2017-02-01 | 艾欧史密斯(中国)热水器有限公司 | Balance type gas-fired water heating device |
| CN106985633A (en) * | 2017-03-03 | 2017-07-28 | 镇江海姆霍兹传热传动系统有限公司 | New-energy automobile electric heater unit |
| CN106985633B (en) * | 2017-03-03 | 2023-12-12 | 镇江海姆霍兹传热传动系统有限公司 | New energy automobile electric heater unit |
| CN109059307A (en) * | 2018-08-21 | 2018-12-21 | 芜湖黑特新能源汽车科技有限公司 | A kind of heating packet power conduction compoboard with temperature sensor |
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Granted publication date: 20130313 Effective date of abandoning: 20151125 |
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