CN202993568U - Electric heating unit and electric vehicle - Google Patents
Electric heating unit and electric vehicle Download PDFInfo
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- CN202993568U CN202993568U CN 201220339273 CN201220339273U CN202993568U CN 202993568 U CN202993568 U CN 202993568U CN 201220339273 CN201220339273 CN 201220339273 CN 201220339273 U CN201220339273 U CN 201220339273U CN 202993568 U CN202993568 U CN 202993568U
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Abstract
The utility model provides an electric heating unit. The electric heating unit comprises a shell and a plurality of positive temperature coefficient (PTC) electric heating components. The shell is provided with a plurality of heat conduction grooves and a circulation cavity used for accommodating media and circulating of the media, wherein the circulation cavity is arranged in a sealed mode relative to the heat conduction grooves. Each PTC electric heating component comprises a PTC heating element, a first electrode element and a second electrode element arranged on two sides of the PTC heating element, and insulation layers arranged outside the first electrode element and the second electrode element. Each first electrode element and each second electrode element respectively comprise a fixed electrode, the fixed electrode of each first electrode element and/or of each second electrode element is ladder-shaped electrodes, the inner side faces, facing towards the PTC heating elements, of the ladder-shaped electrodes are vertical faces, and the outer side faces, facing towards the insulation layers, of the ladder-shaped electrodes are inclined faces. The heat conduction grooves are ladder-shaped, at least one side of the heat conduction grooves is an inclined face, and the PTC heating elements are arranged in and matched with the ladder-shaped grooves. The utility model further relates to an electric vehicle adopting the electric heating unit. Heat generated by the PTC heating elements of the electric heating unit can be transmitted to media in the circulation cavity through the heat conduction grooves directly, and therefore heat loss is little.
Description
Technical field
The utility model relates to the heater field, relates in particular to a kind of 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 pressure fan is sent here carry out heat exchange, air after heating is sent in car, reaches heating, demist, defrosting and needs the purpose of the parts heating of thermal source for other.Yet, application along with pure electric vehicle and hybrid electric vehicle, particularly for pure electric vehicle, electric motor car does not have engine, there is no enough waste heats during its work for the inner heating of automobile, in addition, under winter extremely cold environment, heating, demist, the needed heat of defrosting can't be provided, and need before automobile starting battery is carried out preheating, otherwise electric motor car can't normally move, and therefore needing increases electric auxiliary heating device on the basis of motor compressor refrigeration.
Existing electric heater unit comprises housing and is positioned over several PTC heatings in described housing, the PTC(positive temperature coefficient) characteristics of heating 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 heater, 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 environment 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 heating of electric calorifie installation is firmly held in this housing and by partition wall and the medium that remains in torus and separates fully, and this partition wall is divided into heating clamber and torus with housing.Torus has import and the outlet that is respectively used to introduce and discharge medium.Heating is preferably the PTC heating 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 recess heating 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 heating wedging recess tightly and guarantee full Surface Contact between long sidepiece, heating and the ladder shape part of U-shaped recess.In order to guarantee the good thermal conductivity to the heating both sides, so that the medium in transferring heat in torus leans against on a side component by making heating, and pressure elements is made by good thermal conductive material and preferred whole surface leans against on heating and realizes.Yet, such scheme makes the PTC heating obtain good fixing by pressure elements, but simultaneously, when conducting heat due to the PTC heating, the side component of U-shaped recess is passed in the caloric requirement that produces on the one side again by pressure elements, then the medium in transferring heat in torus by the U-shaped recess, even pressure elements is made by good thermal conductive material, also can the heat-transfer effect of PTC heating be impacted, cause the thermal efficiency of electric calorifie installation lower; In addition, pressure elements is set the PTC heating is fixed, also make the complex structure of electric calorifie installation, comparatively trouble is installed.
further it is to be noted, the import of the housing of this electric calorifie installation 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 heating is also the length direction setting along housing, described medium when the torus around 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 heating is also shorter, medium can not absorb heat preferably, cause the thermal efficiency of electric calorifie installation lower.
In addition, 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 housing, and described insulation board is made by electrically insulating material; Described the first printed circuit board (PCB) is used for independently heating combination in groups, and the mode that purpose is to organize is controlled heating; Described the second printed circuit board (PCB) is electrically connected to outside power supply terminal and signal terminal, thereby controls the work of PTC heating.yet, there is following problems in this electric calorifie installation: pass through air heat insulation between PTC heating and printed circuit board (PCB), although the thermal conductivity of air is very poor, but can not stop completely the heat of PTC heating upwards to transmit, cause the environment temperature of electric calorifie installation inside very high, even surpass the work ceiling temperature of the electronic devices and components on 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 heat left and right directions transmission up and down that the PTC heating 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 surpasses 5000W, the heat that upwards transmits is very large, temperature is very high, surpass the temperature that on printed circuit board (PCB), electronic devices and components can work, cause the electronic devices and components on printed circuit board (PCB) to damage.
Summary of the invention
The utility model is pressed in heating on the opposite side parts of recess for the PTC heating that solves existing electric heater unit by the pressure elements that is arranged in equally in recess, pressure elements is set can be impacted the heat-transfer effect of PTC heating, make medium not absorb heat preferably, cause the lower technical problem of the thermal efficiency of electric calorifie installation.
In order to solve the problems of the technologies described above, the utility model provides a kind of electric heater unit, comprise housing and several PTC heatings, described housing is formed with several thermal troughs, be used for holding medium and medium supplied to the import in 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 heating comprises the PTC heating component, is located at first, second electrode assemblie of PTC heating component both sides, and is located at the insulating barrier outside first, second electrode assemblie; 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; Described thermal trough is dovetail groove, and its at least one side is the inclined-plane, and described PTC heating is arranged in described dovetail groove and is suitable with described dovetail groove.
In described electric heater unit, 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; The two sides of described thermal trough are the inclined-plane, and the lateral surface of described fixed electrode and the side of described thermal trough are suitable.
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.
In described electric heater unit, 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 electric heater unit, preferably, described PTC heating also comprises synovial membrane, and described synovial membrane is coated on the outer surface of insulating barrier.
In described electric heater unit, preferably, the lateral area of described fixed electrode 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 fixed electrodes.
In described electric heater unit, 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 electric heater unit, 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 several fixed cells are separated to form by described several first dividers and several second dividers.
In described electric heater unit, preferably, separate by described the first divider or the second divider between two adjacent PTC elements.
In described electric heater unit, 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.
In described electric heater unit, more preferably, described housing comprises tank, is installed on the heat-conducting piece on tank, and described tank is plastic injection piece, and described heat-conducting piece is the metal crimp foundry goods, and the junction of described tank and heat-conducting piece is provided with sealing ring; Described several thermal troughs are set on described heat-conducting piece, and described several thermal troughs extend in described tank, form torus between described several thermal troughs and tank, and described import and outlet are located on tank.
In described electric heater unit, more preferably, described heat-conducting piece 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 tank; Described tank 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, more 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.
In described electric heater unit, further preferably, described electric heater unit also comprises circuit control module, described circuit control module is installed on the top of described housing and is electrically connected to described several PTC heatings, and described circuit control module comprises control panel and is installed on electronic devices and components that be used for to control electric heater unit work on control panel; The upper end of described fixed electrode is extended with leading-out terminal, and described leading-out terminal is electrically connected to electronic devices and components on described circuit control module.
In described electric heater unit, further preferably, described electric heater unit also comprises heat insulation module, described heat insulation module is installed on described housing, and between described several PTC heatings and circuit control module, 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 heat insulation foam piece.
In described electric heater unit, further preferably, the thickness of described heat insulation module is 10mm ± 1mm, and wherein, the thickness of described heat conduction blob of viscose is 2mm ± 0.5mm; The thickness of described heat insulation foam piece is 6mm ± 1mm; The thickness of described heat insulation blob of viscose is 2mm ± 0.5mm.
In described electric heater unit, further preferably, described electric heater unit further comprises upper cover and relay, and described upper cover is fixedly connected with housing, and is provided with sealing ring in the junction of described upper cover and housing; Be formed with control cabinet in described upper cover, described circuit control module is arranged in described control cabinet; Described relay is installed on housing, and is electrically connected to circuit control module.
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 electric heater unit as above.
At least one fixed electrode of the PTC heating 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 heating is arranged in described dovetail groove and is suitable with described dovetail groove; Make described PTC heating need to can firmly not be installed in thermal trough by fixture, the heat that the PTC heating produces all can be directly be delivered to medium in torus by thermal trough, thermal loss is less, make the thermal efficiency of the electric heater unit that adopts this PTC heating effectively be improved, can be used to preferably electric motor car heating, defrosting, demist and need the parts heating of thermal source for other;
Secondly, in preferred version, the housing of electric heater unit of the present utility model comprises tank, be installed on the heat-conducting piece in tank, and heating clamber comprises several thermal troughs that the partition wall by heat-conducting piece is separated to form, and torus comprises several cycling elements that are formed between partition wall and tank; Several thermal troughs are formed with passage respectively and between the first side wall of tank 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 in thermal trough, the PTC heating produces, the time that absorbs heat is long, heat absorption efficiency is high, further improves the thermal efficiency of electric heater unit;
Again, in preferred version, electric heater unit of the present utility model arranges heat insulation module between described several PTC heatings and circuit control module, 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 heat insulation foam piece; Wherein, described heat conduction blob of viscose can be delivered to the heat that the PTC heating upwards transmits on the PTC heating again, and then heat is taken away by cooling fluid; Described heat insulation foam piece can stop the heat that the PTC heating produces upwards to transmit; 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 heatings and circuit control module, heat insulation module being set; the interior environment temperature of electric heater unit is obviously reduced; when working long hours, environment temperature is about 60 ℃; normal working temperature (being about 80 ℃) lower than electronic devices and components on circuit control module; electronic devices and components on the holding circuit control module, make long service life, the stable performance of electric heater unit effectively.
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. 3 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 heating.
Fig. 5 is the cutaway view of the PTC heating shown in Fig. 4.
Fig. 6 is that PTC heating shown in Figure 5 is installed on the partial sectional view in the thermal trough of housing.
Fig. 7 is the decomposing schematic representation of the PTC heating shown in Fig. 5.
Fig. 8 is the schematic diagram of the PTC heating component shown in Fig. 5.
Fig. 9 is the schematic diagram of the insulation fixed frame of the PTC heating component shown in Fig. 8.
Figure 10 is the combination schematic diagram of the housing of the utility model preferred embodiment.
Figure 11 is the decomposing schematic representation of the housing of the utility model preferred embodiment.
Figure 12 is the top view of housing shown in Figure 10.
The specific 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, the circuit control module 3 that comprises housing 1, is installed on several PTC heatings 2 in housing 1 and is installed on housing 1 top.Consult Fig. 4, with housing in background technology similarly, described housing 1 comprises: be used for holding PTC heating 2 heating clamber 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 described torus 12 import 13 and for medium (for example: cooling fluid) be directed to outlet 14 outside described torus 12; Described heating clamber 11 comprises several thermal troughs 160, and described PTC heating 2 is arranged in described thermal trough 160, and described torus 12 arranges with respect to described thermal trough 160 sealings; Described circuit control module 3 is installed on housing 1 top and is electrically connected to described several PTC heatings 2, and described circuit control module 3 for the electronic devices and components of controlling electric heater unit work (for example: the IGBT module) is provided with.
In a preferred embodiment, described electric heater unit also comprises upper cover 5, is formed with control cabinet in described upper cover 5, and described circuit control module 3 is arranged in described control cabinet; Described circuit control module 3 comprises control panel, and control panel is used for installing electronic devices and components, and (for example: the IGBT module) be installed on described control panel, described electronic devices and components are core components that circuit is controlled to described electronic devices and components, and temperature is lower just safer.Circuit control module of the present utility model can adopt circuit control module of the prior art, and its control panel, electronic devices and components and circuit control section all can pass through existing techniques in realizing.
In a preferred embodiment, described electric heater unit also comprises heat insulation module 4, described heat insulation module 4 is installed on described housing 1, and between described several PTC heatings 2 and circuit control module 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 heat insulation foam piece 43.By between described several PTC heatings 2 and circuit control module 3, heat insulation module 4 being set; the interior environment temperature of electric heater unit is obviously reduced; when working long hours, environment temperature is about 60 ℃; lower than the normal working temperature (being about 80 ℃) of electronic devices and components on circuit control module 3, holding circuit control module effectively.
Below each main improvement part of the present utility model is elaborated so that those skilled in the art better understands the utility model.
One, PTC heating
The structure of the PTC heating of mentioning in the structure that one of main improvement of the present utility model is the PTC heating and background technology exists different, and making PTC heating 2 need not can good being arranged in thermal trough 160 by pressure elements.Consult Fig. 4-9, the PTC heating 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 heating produces can be directly passes to medium in 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 heating 2 with this structure can embed thermal trough 160 easily, when embedding thermal trough 160, the pressure of suffered thermal trough 160 both sides can make PTC heating 2 and thermal trough 160 good the contacting of formation, and, it is darker that PTC heating 2 embeds thermal trough 160, the pressure at right angle that PTC heating 2 is subject to is larger, more be not easy to be removed, need not pressure elements, can realize its fixation.Described PTC heating 2 is embedded in thermal trough 160, the heat that produces is conducted to thermal trough 160, thermal trough 160 not only plays the effect that medium and PTC heating 160 are kept apart, also play simultaneously the effect of conduction heat, therefore thermal trough 160 adopts the metal with good heat conductive performance to make, and is preferably aluminum or aluminum alloy.Thermal trough 160 has the cross section that is trapezoidal, can satisfy demoulding needs, is convenient to again install PTC heating 2 and forms good contacting with PTC heating 2.Be understandable that, described thermal trough 160 can be also 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 heating 2 form good contacting with thermal trough 160.
As shown in Fig. 5-7, 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 heating 2 can be fixed in thermal trough 160 and with thermal trough 160 and form good contacting.Described fixed electrode 22 is made by conductive 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, leading-out terminal 221 can be fixed on fixed electrode 22 by welding or riveting method, be used for being electrically connected to described circuit control module 3, to control 2 work of PTC heating by circuit control module 3.In addition, for guaranteeing between PTC heating component 20 and 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, under preferable case, the area of fixed electrode 22 is greater than the lateral area of PTC heating component 20, and extend to form up and/or down extension, locate to fill heat conduction embedding blob of viscose 25 between the extension of two fixed electrodes 22, 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. 5-7, as everyone knows, electric conductivity between the PTC element of PTC heating 2 and battery lead plate (being equivalent to fixed electrode), security, reliability under the withstand voltage properties of contact resistance size to the electrical heating module, particularly long-time, high voltage operation environment have a significant impact.In the prior art, the PTC element of PTC heating 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 were arranged on battery lead plate, part PTC element not exclusively contacted with electrode, and the way of contact of this direct contact is under high voltage environment, the risk of arc over PTC element appears in existence, 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, the heat that makes the PTC element produce 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, make the PTC heating have better security, 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, lower than 400V(DC) voltage under, can contact electrode be set and fixed electrode (trapezoidal electrode) only is set.
As shown in Fig. 5-7, described PTC heating 2 further comprises the insulating barrier 23 of being located at fixed electrode 22 outsides, and 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 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 heating embedded in thermal trough 160, the suffered shearing force of insulating heat-conductive film 23 more easily damaged insulating heat-conductive film 23.Thereby in the preferred case, PTC heating 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 employing intensity is higher, ganoid material is 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 PTC heating 2 is embedded in thermal trough 160, can effectively protect insulating heat-conductive film 23 not to be damaged.
Those skilled in the art will appreciate that when PTC heating 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 incomplete same, 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 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, make described several PTC elements 27 to access fixing preferably, and influencing each other when reducing 27 work of PTC element makes the power of PTC element 27 be fully played.
As shown in Fig. 7-9, specifically, PTC heating component 20 is to produce the device of heat in PTC heating 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 in the relative both side surface of ceramic PTC the conductive electrode (not shown) that arranges by modes such as spraying, printings, 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.
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 on width effectively; 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 9, two PTC elements 27 adjacent on width 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, makes the performance of PTC element 27 be fully played.
As Fig. 5-shown in Figure 8, 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 contact electrode reliably and then fixing PTC element reliably, 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 on thickness direction between two contact electrodes 21, makes several PTC elements 27 effectively be fixed.
Skilled in the art will recognize that, when the PTC heating 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 heating 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 thermal conductivity factor 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 heating 2 by above-mentioned insulation fixed frame 26, make PTC heating 2 of the present utility model can be applicable to hyperbaric environment, security performance is high.
installation and the use procedure of the PTC heating 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 be placed in 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, form PTC heating 2.Above-mentioned mounted PTC heating 2 is embedded in thermal trough 160, during use, pass into medium from the import 13 of housing, and switch on power, 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 car, defrosting, demist and battery preheating etc.
As from the foregoing, at first, the fixed electrode of the electrode assemblie of the PTC heating 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 heating is arranged in described dovetail groove and is suitable with described dovetail groove; Make described PTC heating need to can firmly not be installed in thermal trough by fixture (pressure elements), the heat that the PTC heating produces all can be directly be delivered to medium in torus by thermal trough, thermal loss is less, and can effectively save the PTC heating installing space, alleviate quality; Make the thermal efficiency of the electric heater unit that adopts this PTC heating effectively 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 heating 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, the heat that makes the PTC element produce 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 heating 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 heating is embedded in thermal trough, can effectively protect the insulating heat-conductive film not to be damaged.
in addition, the PTC heating 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 make these several PTC elements be 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, make the heating properties of PTC element be fully played, heating power is effectively promoted, make the thermal efficiency of the electric heater unit that adopts this PTC heating effectively 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 adopting high temperature resistant, high pressure resistant material, described insulation fixed frame is made, increased the withstand voltage properties between electrode assemblie, can reduce the phenomenon of two arcing discharges between electrode assemblie, avoid the PTC element because the arcing discharge is breakdown, make PTC heating 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.
Two, housing
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 heating is also the length direction setting along housing, described medium when the torus around 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 heating is also shorter, medium can not absorb heat preferably, cause the thermal efficiency of electric calorifie installation lower.Thereby, in preferred embodiment of the present utility model, in order further to improve the thermal efficiency of electric heater unit, the structure that another mainly improves the housing of mentioning in the structure that is housing 1 and background technology of the present utility model is different, make the circulation path of medium in torus 12 be different from the circulation path of torus of the prior art, circulation path is longer.
Further, consult Fig. 1-4, Figure 10-12, described housing 1 comprises tank 15, is installed on the heat-conducting piece 16 on tank 15.Described tank 15 is the hollow cuboid of end face opening, adopts the insulation material to be made, and for example: described tank 15 can adopt resistant to elevated temperatures injection molding; Be mainly used in forming torus 12 and circulate in torus 12 to hold cooling fluid and direct coolant, thereby the heat that the PTC heating produces is taken away.Described tank 15 comprises base plate 150 and four sidewalls that arrange around described base plate 150, and be formed with accommodating cavity 155 in tank 15, 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 tank 15, two sidewalls that the 3rd sidewall 153 and the 4th sidewall 154 are oppositely arranged for the width along tank 15.Also be provided with on described tank 15 for medium being supplied to the import 13 in 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 tank 15, as shown in figure 11, 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, and perhaps import 13 and outlet 14 are arranged at respectively on the 3rd sidewall 153 and the 4th sidewall 154 (consulting Fig. 4).
Described heat-conducting piece 16 is installed on tank 15, described heat-conducting piece 16 (for example: metal) be made adopts Heat Conduction Material, for example: adopt the aluminium alloy compression casting moulding, be mainly used in forming thermal trough 160 with arrangement PTC heating 2, and the heat that the PTC heating is produced passes to cooling fluid.Heat-conducting piece 16 comprises the partition wall 162 that roughly is flat connecting wall 161, is arranged with in the accommodating cavity 155 of tank 15 by connecting wall 161, and be separated to form and be connected in several thermal troughs 160 on described connecting wall 161 by partition wall 162, described thermal trough 160 is used for installing PTC heating 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 heating 2 is arranged in described dovetail groove 160 and is suitable with described dovetail groove 160.Thermal trough 160 not only plays the effect that medium and PTC heating 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, 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 accommodating cavity 155 of described tank 15.As shown in Figure 4, described several thermal troughs 160 are separated to form by partition wall 162, the common heating clamber 11 that is used for heat medium that forms of described several thermal troughs 160.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 accommodating cavity 155 of tank 15 for the heating clamber 11 of placing the PTC heating and is used for holding the torus 12 that medium also passes 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 tank 15, and is positioned at the below of connecting wall 161.Wherein, outermost cycling element 120 is formed between outermost thermal trough 160 and tank 15; Middle cycling element 120 is formed between adjacent two thermal troughs 160 and tank 15.Described thermal trough 160 for sealing arranges, causes damage to avoid medium to PTC heating 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 tank 15 or the second sidewall 152 between be formed with passage 17(and consult Figure 12, what the label of Figure 12 marked is only the position of passage 17, be understandable that, passage 17 is positioned at enclosure interior), make several cycling elements 120 be 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 the interior PTC heating 2 of thermal trough 160 produces, the time that absorbs heat is long, 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; Make described several cycling elements 120 be 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 the 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 the interior PTC heating 2 of thermal trough 160 produces, and the time that absorbs heat is long, heat absorption efficiency is high, makes the thermal efficiency of the electric heater unit that adopts this housing effectively 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 heating 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 heat-conducting piece 16, be that thermal trough 160 is along the width setting of described heat-conducting piece 16, owing to being 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 heat-conducting piece 16.Arranging rationally of the thermal trough 160 of this structure, magnitude setting is more, can better place PTC heating 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 thermal 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 heat-conducting piece 16, correspondingly, described the first side wall and the second sidewall two sidewalls for being oppositely arranged along the tank 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 heat-conducting piece 16, and arranging of thermal trough 160 is rational in infrastructure, also is more convenient for installing PTC heating 2.
As shown in figure 11, in the utility model, preferably, described heat-conducting piece 16 extends upward and is provided with flange 163, described flange 163 is placed on tank 15, and the upper end of described tank 15 is provided with connector 156, correspondingly is provided with installed part 164 on the flange 163 of heat-conducting piece 16, described installed part 164 is placed in described connector 156, passes through holes in the middle of described installed part 164, connector 156 by screw and described heat-conducting piece 16 is installed on tank 15 and with described tank 15 is fixedly connected with.And, junction at described tank 15 and heat-conducting piece 16 is provided with sealing ring 61, described sealing ring 61 is all good plastic injection pieces of high temperature performance, is used for the sealing of tank 15 and heat-conducting piece 16, can not leak from the junction of tank 15 and heat-conducting piece 16 so that enter the medium of tank 15.
In addition, consult Figure 10 and Figure 11, in the present embodiment, the outer wall of described tank 15 is provided with fixture 158, and described fixture 158 is provided with fixing hole, and the through hole that passes on described fixture 158 by screw can be arranged on whole electric heater unit in electric motor car.In addition, also be provided with outer reinforcement 1571 on the outer wall of described tank 15, be used for reinforcing tank, increase the intensity of tank, when guaranteeing electric heater unit work, tank can not be out of shape.The inwall of described tank 15 is provided with interior reinforcement 1572, and interior reinforcement 1572 can either increase the intensity of tank, can also increase water resistance, extends the time of contact of cooling fluid and heat-conducting piece 16, guarantees can be taken away fully by the heat of heat-conducting piece 16 conduction.Also be provided with steam vent 159 on described tank 15, described steam vent 159 is connected with torus 12, and when being used for guaranteeing that electric heater unit works long hours, the steam in tank 15 can in time be got rid of, and guarantees the security of housing.
As shown in figure 11, in the present embodiment, the outside of several thermal troughs 160 of described heat-conducting piece 16 is provided with reinforcement 165, described reinforcement 165 can either increase the intensity of heat-conducting piece, can also increase water resistance, extend the time of contact of cooling fluid and heat-conducting piece 16, guarantee to be taken away fully by the heat of heat-conducting piece 16 conduction.Several thermal troughs 160 on described heat-conducting piece 16 stretch in the accommodating cavity 155 of described tank 15, interior reinforcement 1572 on the inwall of described tank 15 and the setting of the reinforcement 165 on several thermal troughs 160 can also make several thermal troughs 160 of heat-conducting piece 16 be located in tank 15 preferably.
In the present embodiment, the size of described PTC heating 2 is corresponding to the size of each thermal trough 160, be embedded with a PTC heating 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 heating more than two or two need to be installed in thermal trough 160, and described PTC heating adopts PTC heating of the present utility model.
The below introduces installation and the use procedure of the housing of the utility model preferred embodiment, heat-conducting piece 16 is installed in tank 15, in the junction of heat-conducting piece 16 and tank 15, sealing ring 61 be set and be connected and sealed by sealing ring 61, the through holes that pass in the middle of described installed part 164, connector 156 by screw are fixed in described heat-conducting piece 16 on tank 15; Several thermal troughs 160 on described heat-conducting piece 16 are inserted in the accommodating cavity 155 of tank 15, form torus 12; During use, PTC heating 2 is embedded in thermal trough 160, and PTC heating 2 is switched on power, PTC heating 2 generates heat and transfers heat to heat-conducting piece 16, import 13 from tank 15 simultaneously passes into cooling fluid, the cooling fluid torus 12 of flowing through flows out from the outlet 14 of tank 15 after being absorbed in the heat that the heat-conducting piece 16 that obtains in torus 12 transmits, and heat is taken away for the heating in car, defrosting, demist and battery preheating etc.
As from the foregoing, the housing of the electric heater unit of the utility model preferred embodiment comprises tank, is installed on the heat-conducting piece in tank, heating clamber comprises several thermal troughs that the partition wall by heat-conducting piece is separated to form, and torus comprises several cycling elements that are formed between partition wall and tank; Several thermal troughs are formed with passage respectively and between the first side wall of tank 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 in thermal trough, the PTC heating produces, the time that absorbs heat is long, heat absorption efficiency is high, further improves the thermal efficiency of electric heater unit.
Three, heat insulation module
As stated in the Background Art, when high power PTC electric calorifie installation is worked, the heat left and right directions transmission up and down that the PTC heating 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 on printed circuit board (PCB), electronic devices and components can work, cause the electronic devices and components on printed circuit board (PCB) to damage.Thereby, as shown in Figures 2 and 3, in preferred embodiment of the present utility model, electric heater unit also comprises heat insulation module 4, described heat insulation module 4 is installed on described housing 1, and between described several PTC heatings 2 and circuit control module 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 heat insulation foam piece 43.Wherein, described heat conduction blob of viscose 41 can be delivered to the heat that PTC heating 2 upwards transmits on PTC heating 2 again, and then heat is taken away by cooling fluid; The heat that described heat insulation foam piece 43 can stop PTC heating 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 heatings 2 and circuit control module 3, heat insulation module 4 being set; the interior environment temperature of electric heater unit is obviously reduced; when working long hours, environment temperature is about 60 ℃; lower than the normal working temperature (being about 80 ℃) of electronic devices and components on circuit control module 3, the holding circuit control module 3 effectively.
Consult Fig. 2-Fig. 3, specifically, described heat insulation module 4 comprises three-decker, and thickness is 10mm ± 1 mm.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 thermal conductivity factor is at least 1.5W/m.k, the heat-conducting glue of heatproof more than 280 ℃ made, the thermal conductivity factor of described heat-conducting glue is preferably 1.5W/(mK) ~ 3.0W/(mK), tolerate the temperature of 280 ℃ ~ 300 ℃; 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 heating again with the heat that PTC heating 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 thermal conductivity factor to be up at least 200 ℃ of 0.15W/m.k, heatproof is made, more preferably the thermal conductivity factor of adiabatic foam is 0.05 W/(mK) ~ 0.15W/(mK), tolerate the temperature of 200 ℃ ~ 300 ℃; 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 heating upwards to be delivered to circuit control module 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 thermal conductivity factor to be up at least 200 ℃ of 0.15W/m.k, heatproof is made, more preferably the thermal conductivity factor of heat insulation blob of viscose 42 is 0.05 W/(mK) ~ 0.15W/(mK), tolerate the temperature of 200 ℃ ~ 300 ℃; 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 by ground floor heat conduction blob of viscose 41 heat that comes and further upwards is delivered to circuit control module 3; Three, have certain cushioning effect, when travelling under relatively poor road conditions due to electric motor car, vibrate stronglyer, heat insulation blob of viscose 42 elasticity of this layer are better, and the elastic deformation amount is large, can effectively reduce the possibility that PTC heating and heat insulation foam piece 43 damage.
The installation of the heat insulation module 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 heat insulation foam piece 43, obtain heat insulation module 4; Then several PTC heatings 2 are embedded in the thermal trough 160 of housing 1 by fixture successively, again heat insulation module 4 is installed on the top of housing 1, mounting circuit control module 3 on heat insulation module 4 again, wherein, the heat conduction blob of viscose 41 of heat insulation module 4 is placed near PTC heating 2, and the heat insulation foam piece 43 of heat insulation module 4 is placed near circuit control module 3; And then upper cover 5 is installed above circuit control module 3, and upper cover 5 is fixed on housing 1, complete the installation of electric heater unit and heat insulation module.during use, pass into medium from the import 13 of housing 15, and PTC heating 2 is switched on power, PTC heating 2 begins heating, heat upwards, under, 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 due to the setting of heat insulation module 4, by heat insulation foam piece 43, heat insulation blob of viscose 42 preventions are caught by ground floor heat conduction blob of viscose 41 heat that comes and further upwards are delivered to circuit control module 3, make it be difficult to the upward direction transmission, and by heat conduction blob of viscose 41, the heat that PTC heating 2 upwards transmits is delivered to PTC heating 2 again, then heat is taken away by the cooling fluid in the torus 12 of housing 1 again, electronic devices and components on holding circuit control module 3 effectively, make the long service life of electric heater unit, stable performance, can make again medium (cooling fluid) take away more heat, reduce thermal loss, make the thermal efficiency of electric heater unit be improved.
As from the foregoing, the electric heater unit of the utility model preferred embodiment arranges heat insulation module between described several PTC heatings and circuit control module, 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 heat insulation foam piece; Wherein, described heat conduction blob of viscose can be delivered to the heat that the PTC heating upwards transmits on the PTC heating again, and then heat is taken away by cooling fluid; Described heat insulation foam piece can stop the heat that the PTC heating produces upwards to transmit; 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 heatings and circuit control module, heat insulation module being set; the interior environment temperature of electric heater unit is obviously reduced; when working long hours, environment temperature is about 60 ℃; normal working temperature (being about 80 ℃) lower than electronic devices and components on circuit control module; electronic devices and components on the holding circuit control module, make long service life, the stable performance of electric heater unit effectively.
Four, other parts
Consult Fig. 2 and Fig. 3, the electric heater unit of the utility model preferred embodiment comprises circuit control module 3, described circuit control module 3 comprises control panel and is installed on electronic devices and components on control panel, control panel is used for installing electronic devices and components, described electronic devices and components (for example: the IGBT module) be high voltage withstanding electronic devices and components commonly used, be the core component that circuit is controlled, temperature is lower just safer.Described electronic devices and components are electrically connected to described several PTC heatings (being specially the leading-out terminal of fixed electrode), its Main Function is to regulate the quantity of PTC heating work by electronic devices and components, make the different power of electric heater unit output, to satisfy the needs of the different operating modes of automobile.
Consult Fig. 1-3, the electric heater unit of the utility model preferred embodiment also comprises upper cover 5, and described upper cover 5 is fixedly connected with tank 15.Be formed with control cabinet in described upper cover 5, described circuit control module 3 is arranged in described control cabinet, the Main Function of described upper cover 5 is to guarantee that circuit control module 3 works in the environment of a sealing, cause circuit control module that the control of electric heater unit was lost efficacy in order to avoid moisture enters.In the preferred case, junction at described upper cover 5 and tank 15 is provided with sealing ring 62, and described sealing ring 62 is all good plastic injection pieces of high temperature performance, is used for the sealing of upper cover 5 and tank 15, to prevent that water gas and dust from entering control cabinet, cause circuit control module to lose efficacy.In addition, in described control cabinet, boss 31 and gripper shoe can also be set further, described boss 31, gripper shoe are fixedly connected with the control panel of circuit control module 3, described boss 31 is used for the IGBT on fixing control panel, prevents that control panel rocking and the heat of IGBT generation in time can be transmitted on heat-conducting piece 16 and by cooling fluid in the vehicle operating process from leading away; Gripper shoe between control panel and heat insulation module, is for the holding components of supporting control panel, prevents circuit control module at the vehicle traveling process moderately gusty air, causes that the electronic devices and components on control panel come off or become flexible.
Consult Fig. 2 and Fig. 3, the electric heater unit of the utility model preferred embodiment further comprises relay 7, and described relay 7 is installed on tank 15, and is electrically connected to circuit control module 3.It is the second heavy security protection element (first heavily security protection element be upper cover 1), when the control of circuit control module was lost efficacy, can in time cut off the electric current in circuit, avoids the electric heater unit blast to hurt sb.'s feelings.
Need to prove, circuit control module of the present utility model, relay all can adopt circuit control module of the prior art, relay, the control panel of circuit control module, electronic devices and components and circuit control section all can pass through existing techniques in realizing, in addition, the structure members such as upper cover, boss and gripper shoe also can adopt conventional structure member, do not do at this and give unnecessary details.
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 or the radiator that are connected with electric heater unit, (for example: cooling fluid) electric heater unit of flowing through carries out the heat collection to medium, medium after the absorption heat enters heat exchanger or radiator, by heat exchanger or radiator, through the cross-ventilation heat exchange, thermal release is carried out heating in car, defrosting, demist, battery preheating and realizes other heating function.Other parts of described heat exchanger, radiator and air conditioning and heating system all can pass through existing techniques in realizing, do not do at this and give unnecessary details.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (18)
1. electric heater unit, comprise housing and several PTC heatings, described housing is formed with several thermal troughs, be used for holding medium and medium supplied to the import in 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 heating comprises the PTC heating component, is located at first, second electrode assemblie of PTC heating component both sides, and is located at the insulating barrier outside first, second electrode assemblie; 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;
Described thermal trough is dovetail groove, and its at least one side is the inclined-plane, and described PTC heating is arranged in described dovetail groove and is suitable with described dovetail groove.
2. electric heater unit 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; The two sides of described thermal trough are the inclined-plane, and the lateral surface of described fixed electrode and the side of described thermal trough are suitable.
3. electric heater unit 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. electric heater unit 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. electric heater unit as claimed in claim 1, is characterized in that, described PTC heating also comprises synovial membrane, and described synovial membrane is coated on the outer surface of insulating barrier.
6. electric heater unit as claimed in claim 1, is characterized in that, the lateral area of described fixed electrode is greater than the lateral area of PTC heating component, and extend to form extension; Be filled with heat conduction embedding blob of viscose between the extension of described two fixed electrodes.
7. electric heater unit 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. electric heater unit 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 several fixed cells are separated to form by described several first dividers and several second dividers.
9. electric heater unit 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. electric heater unit 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. as the described electric heater unit of claim 1-10 any one, it is characterized in that, described housing comprises tank, is installed on the heat-conducting piece on tank, the junction of described tank and heat-conducting piece is provided with sealing ring; Described several thermal troughs are set on described heat-conducting piece, and described several thermal troughs extend in described tank, form torus between described several thermal troughs and tank, and described import and outlet are located on tank.
12. electric heater unit as claimed in claim 11 is characterized in that, described heat-conducting piece 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 tank; Described tank 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.
13. electric heater unit as claimed in claim 12, 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.
14. as the described electric heater unit of claim 1-10 any one, it is characterized in that, described electric heater unit also comprises circuit control module, described circuit control module is installed on the top of described housing and is electrically connected to described several PTC heatings, and described circuit control module comprises control panel and is installed on electronic devices and components that be used for to control electric heater unit work on control panel; The upper end of described fixed electrode is extended with leading-out terminal, and described leading-out terminal is electrically connected to electronic devices and components on described circuit control module.
15. electric heater unit as claimed in claim 14, it is characterized in that, described electric heater unit also comprises heat insulation module, described heat insulation module is installed on described housing, and between described several PTC heatings and circuit control module, 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 heat insulation foam piece.
16. electric heater unit as claimed in claim 15 is characterized in that, the thickness of described heat insulation module is 10mm ± 1mm, 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.
17. electric heater unit as claimed in claim 14 is characterized in that, described electric heater unit further comprises upper cover and relay, and described upper cover is fixedly connected with housing, and is provided with sealing ring in the junction of described upper cover and housing; Be formed with control cabinet in described upper cover, described circuit control module is arranged in described control cabinet; Described relay is installed on housing, and is electrically connected to circuit control module.
18. an electric motor car comprises it is characterized in that the air conditioning and heating system, described air conditioning and heating system comprises as the described electric heater unit of claim 1-17 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220339273 CN202993568U (en) | 2012-07-13 | 2012-07-13 | Electric heating unit and electric vehicle |
| 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 201220339273 CN202993568U (en) | 2012-07-13 | 2012-07-13 | Electric heating unit and electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202993568U true CN202993568U (en) | 2013-06-12 |
Family
ID=48564743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220339273 Expired - Lifetime CN202993568U (en) | 2012-06-27 | 2012-07-13 | Electric heating unit and electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202993568U (en) |
Cited By (6)
| 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 |
| CN103542528A (en) * | 2012-07-13 | 2014-01-29 | 比亚迪股份有限公司 | Electric heating device and electric vehicle |
| CN103950365A (en) * | 2014-04-30 | 2014-07-30 | 广西柳工机械股份有限公司 | Cab heating system |
| EP2884198A1 (en) * | 2013-12-13 | 2015-06-17 | Eberspächer catem GmbH & Co. KG | Electric heating device |
| EP2884199A1 (en) * | 2013-12-13 | 2015-06-17 | Eberspächer catem GmbH & Co. KG | Electric heating device |
| CN106440331A (en) * | 2016-08-30 | 2017-02-22 | 陈非 | Automatic constant-temperature heating system and control method thereof |
-
2012
- 2012-07-13 CN CN 201220339273 patent/CN202993568U/en not_active Expired - Lifetime
Cited By (8)
| 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 |
| CN103542528A (en) * | 2012-07-13 | 2014-01-29 | 比亚迪股份有限公司 | Electric heating device and electric vehicle |
| CN103542528B (en) * | 2012-07-13 | 2015-04-22 | 比亚迪股份有限公司 | Electric heating device and electric vehicle |
| EP2884198A1 (en) * | 2013-12-13 | 2015-06-17 | Eberspächer catem GmbH & Co. KG | Electric heating device |
| EP2884199A1 (en) * | 2013-12-13 | 2015-06-17 | Eberspächer catem GmbH & Co. KG | Electric heating device |
| CN103950365A (en) * | 2014-04-30 | 2014-07-30 | 广西柳工机械股份有限公司 | Cab heating system |
| CN103950365B (en) * | 2014-04-30 | 2016-07-06 | 广西柳工机械股份有限公司 | A kind of cab heating system |
| CN106440331A (en) * | 2016-08-30 | 2017-02-22 | 陈非 | Automatic constant-temperature heating system and control method thereof |
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