CN109210768A

CN109210768A - electric heater

Info

Publication number: CN109210768A
Application number: CN201710521501.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2019-01-15
Anticipated expiration: 2037-06-30
Also published as: CN109210768B

Abstract

A kind of electric heater, including mounting wall and light current terminal, mounting wall includes lug boss, lug boss is corresponding with light current terminal position, and lug boss can provide corresponding space for installation light current terminal, and light current terminal is avoided to be installed on the top of electric heater, relatively reduce the thickness of electric heater, forceful electric power terminal and light current terminal are located at the same side of electric heater, the length or width of electric heater are relatively reduced, so that electric heater volume of the invention is relatively small.

Description

Electric heater

[technical field]

The present invention relates to technical field of vehicle, and in particular to a kind of electric heater.

[background technique]

Currently, the electric heater for vehicle use generallyd use includes forceful electric power terminal and light current terminal, forceful electric power terminal and light current terminal It is located at the not ipsilateral of electric heater, the relative increase length or width of electric heater；Or since light current terminal is pacified Required space is larger when dress, light current terminal is installed on to the top of electric heater, the relative increase thickness of electric heater.

[summary of the invention]

The purpose of the present invention is to provide a kind of electric heaters that security performance is relatively high.

To achieve the above object, the present invention adopts the following technical scheme: a kind of electric heater, the electric heater are used for Vehicle, including enclosure body, control module, forceful electric power portion and light current portion, the forceful electric power portion, light current portion and the control module Electrical connection, the enclosure body include mounting wall with combining harmoniously, and the electric heater includes installing zone, and the installing zone includes The mounting wall and the space between combining harmoniously, the light current portion, the light current portion and the mounting wall are fixedly installed, The mounting wall includes lug boss, and the lug boss protrudes out setting, the lug boss packet with the direction combined harmoniously towards away from described Lug boss first, lug boss second and lug boss third portion are included, it is described with direction of combining harmoniously, the protrusion along being parallel to For portion's second position between the lug boss first and lug boss third portion, the installing zone includes lug boss first The space that portion, lug boss second and lug boss third portion are formed.

Electric heater of the invention includes mounting wall and light current terminal, and mounting wall includes lug boss, lug boss and light current end Sub- position is corresponding, and lug boss can provide corresponding space for installation light current terminal, and light current terminal is avoided to be installed on electric heating The top of device, relatively reduces the thickness of electric heater, and forceful electric power terminal and light current terminal are located at the same side of electric heater, phase To the length or width for reducing electric heater, so that electric heater volume of the invention is relatively small.

[Detailed description of the invention]

Fig. 1 is a stereoscopic schematic diagram of electric heater；

Fig. 2 is the part separate structure schematic diagram of electric heater first embodiment in Fig. 1；

Fig. 3 is the enlarged diagram of P in Fig. 2；

Fig. 4 is another schematic perspective view of electric heater；

Fig. 5 be in Fig. 4 electric heater along the diagrammatic cross-section in the direction M-M；

Fig. 6 is the enlarged diagram of N in Fig. 5；

Fig. 7 is a kind of schematic cross-section of embodiment of projective structure；

Fig. 8 is the schematic cross-section of projective structure another embodiment；

Fig. 9 is the schematic perspective view of an angle of isolation part in Fig. 2；

Figure 10 is the schematic perspective view of enclosure body and an angle of relevant portion in Fig. 2；

Figure 11 is the enlarged diagram of L in Figure 10；

Figure 12 is enclosure body and a schematic perspective view of relevant portion in Fig. 2；

Figure 13 is a schematic perspective view of heating tube in Fig. 2；

Figure 14 is the schematic perspective view of an angle of Fig. 2 cover plate；

Figure 15 is the schematic perspective view of another angle of Fig. 2 cover plate；

Figure 16 is the enlarged diagram of K in Figure 15；

Figure 17 is a kind of electric connection mode schematic diagram of Thermal Cutoffs and heating element；

Figure 18 is another electric connection mode schematic diagram of Thermal Cutoffs and heating element；

Figure 19 is the schematic diagram of another electric connection mode of Thermal Cutoffs and heating element；

Figure 20 is a schematic perspective view of heat-conducting part and relevant portion first embodiment；

Figure 21 is a schematic diagram of heat-conducting part and relevant portion another embodiment；

Figure 22 is a schematic perspective view of heat-conducting part and relevant portion second embodiment；

Figure 23 is a schematic perspective view of heat-conducting part and relevant portion 3rd embodiment；

Figure 24 is a schematic perspective view of heat-conducting part and relevant portion fourth embodiment；

Figure 25 is a schematic perspective view of heat-conducting part and another embodiment of relevant portion fourth embodiment；

Figure 26 is the partial schematic diagram of heat-conducting part and relevant portion in Figure 25；

Figure 27 is the part separate structure schematic diagram of second of embodiment of electric heater；

Figure 28 is a schematic cross-section of inlet tube in Figure 27.

[specific embodiment]

The present invention will be further explained below with reference to the attached drawings and specific examples:

Electric heater can convert electrical energy into thermal energy, suitable for the working media to liquid or liquid-vapor mixture state It is heated, heating means is by making electric heater be powered to electricity, so that heating element generates heat after being powered and to work Medium is heated.Electric heater is able to use in technical fields such as vehicles, and carries out heat supply for the operating condition of institute's calorific requirement.

Fig. 1-Figure 26 is please referred to, Fig. 1-Figure 26 is the first embodiment of electric heater.Electric heater 100 includes shell 1, fluid cavity 2, isolation part 3, drive module 4, control module 5, heating element 6, wire connecting portion 7 and import 81, outlet 82, electricity Heater 100 makes heating element 6 generate heat and heat to the working media in fluid chamber 2 by external to electric.Shell 1 includes first shell 11, enclosure body 12 and second shell 13, and the first, second shell is set with enclosure body sealing fixation It sets, electric heater 100 includes installation space, and installation space includes the space that first, enclosure body and second shell are formed, Fluid cavity 2, isolation part 3, drive module 4, control module 5 and heating element 6 are located at the installation cavity, isolation part 3, driving mould Block 4, control module 5 and heating element 6 are electrically connected.

Please referring to figure Fig. 1 and Fig. 2, shell 1 includes first shell 11, enclosure body 12 and second shell 13, first, Metal material compression moulding can be used in second shell and enclosure body, has the function of supporting and protect, specifically, can adopt With aluminium compression moulding.In the embodiment shown in Fig. 1-Figure 26, the first, second shell is sealed with enclosure body 12 respectively It is fixedly installed, the fixed setting in fixed setting herein and following full text includes directly being fixedly installed and fixing relatively to be arranged, directly It connects fixed setting and refers to that both the components for needing fixation are fixed to one another setting, for example, two or more components pass through bolt each other Fixed, two or more components are fixed to one another by welding, two or more components by self structure (such as grafting) or Other modes realize fixed setting, two or to a component by integrally formed realization fixed setting；Fixed be arranged is relatively Refer to, fixed component is needed fixed component can be needed relatively fixed by being fixed to one another to reach with object of reference, than Such as, two components are fixed with third component respectively, so that both parts are relatively fixed, third component is at this time For object of reference, in addition, object of reference can include one incessantly.First shell 11 is swelled including first shell ontology 111, first Portion 112, the first recessed portion 113, the first fixed part 114 and first edge portion 115, wherein the first protrusion 112 is towards back Direction protrusion setting, the first recessed portion 113 from enclosure body protrude setting, first shell towards the direction of enclosure body 12 11 and enclosure body 12 can be relatively fixed by the first fixed part 114, first edge portion 115 is prolonged by first shell ontology 111 It stretches and is arranged to 12 bending of enclosure body, first edge portion 115 can be fixed in first shell 11 and the installation of enclosure body 12 It can not include certainly first edge portion as other embodiment first shell that initially fixed effect is played in journey.Shell Body ontology 12 includes the first wall 121 and heat conductive wall 122, and the heat transfer that heat conductive wall 122 can generate heating element 6 is to work Make medium, heat conductive wall 122 itself cannot generate heat.The heat conductive wall 122 and the first wall 121 are fixedly installed, specifically, heat transfer Wall 122 and the first wall 121 are integrally formed, and the first wall 121 has angle with heat conductive wall 122, which is greater than zero, specifically, the One wall 121 is vertically arranged with heat conductive wall 122, is vertically arranged the error range including 0~10 degree herein.Heat conductive wall 122 has the One side 1221, the second side 1222 and groove 1223, wherein the first side 1221 is towards fluid cavity 2 and first shell 12, the first side 1221 at least partially forms a part of wall portion of fluid cavity, and the second side 1222 is away from fluid cavity towards the Two shells 13, groove 1223 are recessed when heating element 6 is heating tube between the first side 1221 and the second side 1222 Slot 1223 provides placement space for heating tube, as other embodiments, when heating element is not heating tube, for example, plus When thermal element is that PCT is heated, enclosure body 12 does not include groove, and heating element is located at the second lateral side of heat conductive wall, and with heat transfer When the contact setting of the second side of wall or heating element are Electric radiant Heating Film, Electric radiant Heating Film is located at the second lateral side of heat conductive wall, and with biography The contact setting of the second side of hot wall.Second shell 13 includes second shell ontology 131, the second protrusion 132, the second fixed part 133 and second edge portion 134, wherein the second protrusion 132 is towards second shell 12, second shell 13 and 12 energy of enclosure body It is enough fixed by 133 phase of the second fixed part, second edge portion 134 is extended from second shell ontology 131 and to 12 folding of enclosure body Curved setting, second edge portion 134 can install in second shell 13 and enclosure body 12 and play initially fixation in fixation procedure Effect.

Fixed setting is sealed between first shell 11 and enclosure body 12, which can play water proof and dust proof Effect, specifically, electric heater 100 include sealing element W, and sealing element W is located at least in first shell 11 and enclosure body Between 12, between second shell 13 and enclosure body 12, specifically, sealing element W with sealing surface shape using deforming, no Easily trickling, there is the sealing material of certain caking property, more specifically, sealing element W uses sealant.Fig. 5, Fig. 6 are please referred to, when When first shell 11 and enclosure body 12 carry out installation sealing, it is possible to create since installation discontinuity makes local pressure Excessive, the sealing element W between first shell 11 and enclosure body 12 is squeezed, and causes finally sealed element W should be by when solidifying Power, which crosses general goal, does not have sealing element W, and then causes the problem of sealing effect is not achieved, and stress is excessive and make in order to prevent There is no the problem of sealing element locally between one shell 11 and enclosure body 12, between first shell 11 and enclosure body 12 One or more projective structure 116 is set, and projective structure 116 to keep one between first shell 11 and enclosure body 12 Fixed distance, when being installed, due to the presence of projective structure 116 so that between first shell 11 and enclosure body 12 by Power is comparatively uniform, reduces since the excessive caused part of local pressure does not have the problem of sealing element W.Projective structure 116 Integrally formed with shell 1, specifically, projective structure 116 and first shell 11 be integrally formed or projective structure 116 and shell Body ontology 12 is integrally formed.Projective structure 116 includes projective structure fixed part 1161 and projective structure free end 1162, protrusion Structure free end 1162 is in contact with shell 1, and specifically, projective structure fixed part 1161 and first shell 11 are integrally formed, convex Structure free end 1162 is in contact with enclosure body 12 out, alternatively, projective structure fixed part 1161 and the one of enclosure body 12 at Shape, projective structure free end 1162 are in contact with first shell 11.In Fig. 2-embodiment shown in Fig. 8, projective structure 116 is integrally formed with first shell 11, and specifically, projective structure fixed part 1161 and first shell 11 are integrally formed, protrusion knot Structure free end 1162 is in contact with enclosure body 12, in this way, having gap between first shell 11 and enclosure body 12.First shell When body 11 and enclosure body 12 carry out installation sealing, sealing element W is coated on second shell 12, first shell 11 and shell sheet Body 12 is coupled and compresses, and in the process, extra sealing element W is squeezed positioned at first edge portion 115 and shell Between ontology 12.

Enclosure body 12 includes the second wall 120, specifically, the second wall 120 and the integrally formed setting of the first wall 121, second Wall 120 can be sealed with 11 phase of first shell and be fixed, and enclosure body 12 includes the first bulkhead, that is, mounting wall 1211, the second bulkhead 1212, third bulkhead 1213 and the 4th bulkhead 1214, mounting wall 1211 are oppositely arranged with third bulkhead 1213, the second bulkhead 1212 are oppositely arranged with the 4th bulkhead 1214.First shell 11 include first at 117, second 118, third side 119 and the Four sides 1110, wherein the first side 117 is corresponding with mounting wall 1211, and the second side 118 is corresponding with the second bulkhead 1212, third Side 119 is corresponding with third bulkhead 1213, and the 4th side 1110 is corresponding with the 4th bulkhead 1214.Projective structure 116 is located at the One, second, third and the 4th side, specifically, respectively first, second, third and the 4th be at least arranged on side one it is convex Structure 116 out, when a projective structure 116 is arranged, which is located substantially at first, second, third and The middle position on four sides；More specifically, in order to enable sealing effect is better, respectively first, second, third and Three projective structures 116 are at least arranged in four sides, wherein at least one projective structure is located at first, second, third and the 4th The middle position on side；Further, respectively first, second, third and the 4th side one projective structure is at least set 116, in same edge, adjacent projective structure 116 is at a distance of 30mm or so.Enclosure body 12 include enclosure body outside portion 1215, Enclosure body inside portion 1216 and primary sealing area 1217, primary sealing area 1217 are located at 1215 He of enclosure body outside portion Between enclosure body inside portion 1216 and towards first shell 11, first shell 11 includes secondary sealing area 1111, the second sealing Towards enclosure body 12, projective structure 116 and secondary sealing area 1111 are fixedly installed in face 1111, wherein primary sealing area 1217 Sealing surface is referred to as with secondary sealing area 1111.Projective structure 116 is located at least between first shell 11 and enclosure body 12, Sealing element W is located at least between primary sealing area 1217 and secondary sealing area 1111, more specifically, projective structure 116 is at least Between primary sealing area 1217 and secondary sealing area 1111, projective structure 116 contacts setting, protrusion knot with sealing element W 116 side of structure contacts setting with sealing element W.In the embodiment shown in figure, projective structure fixed part 1161 and second Sealing surface fixes 1111 settings, and projective structure free end 1162 contacts setting with primary sealing area 1217, as other embodiment party Formula, projective structure fixed part and primary sealing area are fixedly installed, and projective structure free end contacts setting with secondary sealing area；Or Person, electric heater include at least two projective structures, and part projective structure fixed part and primary sealing area are fixedly installed, part Projective structure free end and secondary sealing area are fixedly installed.Specifically, projective structure and secondary sealing area are integrally formed, i.e., convex Structure 116 and first shell 11 are integrally formed out, and as other embodiment, projective structure fixed part and primary sealing area are solid Fixed setting, i.e. projective structure and enclosure body is integrally formed, and projective structure free end contacts setting with secondary sealing area, or Electric heater includes at least two projective structures, and part projective structure fixed part and primary sealing area are fixedly installed, i.e., part is convex Structure and enclosure body are integrally formed out, and part projective structure fixed part and secondary sealing area are integrally formed, i.e. part protrusion knot Structure is integrally formed with first shell.In the embodiment shown in fig. 6, projective structure free end 1162 is adopted with primary sealing area face With face contact, when projective structure difference and enclosure body outside portion 1215, enclosure body inside portion 1216 is intersected.Outside portion 1215 and first contact surface 1217 there are two intersections, which is third boundary line and the 4th boundary line, i.e. primary sealing area Including third boundary line and the 4th boundary line, specifically, third boundary line is arranged in parallel with third boundary line, third boundary line The distance between 4th boundary line be the second parallel distance, projective structure 116 simultaneously with third boundary line, the 4th boundary Intersect when line difference, similarly, secondary sealing area includes first borderline and second borderline, projective structure and the first boundary Intersect when line, second borderline difference, specifically, first borderline is parallel with second borderline, first borderline and the second side The distance between boundary line is the first parallel distance.Specifically, projective structure 116 is substantially at round table-like, projective structure fixed part 1161 be the bottom surface of rotary table, and projective structure free end 1162 is the upper bottom surface of rotary table and is curved surface.Projective structure free end 1162 can be used single-contact and non-single-contact with primary sealing area 1217, and non-single-contact refers to projective structure free end 1162 and 1217 intersection of primary sealing area are a face incessantly.Referring to FIG. 7, Fig. 7 shows the point contact of projective structure A kind of schematic cross-section of embodiment, in the embodiment shown in figure, projective structure free end are adopted with sealing face contact With point contact, projective structure 116 has the first contact area and the second contact area, wherein the first contact area refers to protrusion The area of structure fixed part 1161 and secondary sealing area intersection, the second contact area refer to projective structure free end 1162 With the area of 1217 intersection of primary sealing area, the first contact area is more than or equal to the second contact area.Projective structure is different When and enclosure body outside portion, enclosure body inside portion intersection.Projective structure free end contact range area is less than or equal to protrusion Structure fixed part occupied area.Wherein point contact can be single-contact and non-single-contact, and point contact refers to projective structure freedom End is point with sealing surface intersection, and single-contact refers to projective structure free end and sealing surface intersection is a point, non- The point that single-contact refers to projective structure free end and sealing surface intersection is 2 or more, referring to FIG. 8, Fig. 8 is shown A kind of schematic cross-section of the projective structure embodiment of line contact, projective structure free end are connect with sealing face contact using line Touching, when projective structure difference and enclosure body outside portion, the intersection of enclosure body inside portion.Specifically, the strip projective structure from Strip projective structure fixed part occupied area is less than or equal to by end in contact range area, specifically, projective structure is in a strip shape, line Contact refers to projective structure free end and sealing surface intersection is line segment or the curve for having certain length, wherein line contact can For single line contact and the contact of non-single line, single line contact refers to projective structure free end and sealing surface intersection is a line segment Or a curve for having a certain length, non-single line contact refers to projective structure free end and sealing surface intersection is two Or more line segment or two or more the curves for having certain length.Projective structure has height, this highly refers to protrusion Structure fixed part is to the vertical range of projective structure free end, and the height of projective structure is more than or equal to 0.5mm, specifically, protrusion The height of structure can be between 0.5mm-2mm.In order to guarantee that sealing effect, sealing element W have width, sealing element width Refer to the smaller value in the first parallel distance and the second parallel distance, i.e., when the first parallel distance is greater than the second parallel distance, Sealing element width is equal to the second parallel distance, when the first parallel distance is less than the second parallel distance, sealing element width etc. In the first parallel distance, the sealing element width is more than or equal to 5mm, and specifically, sealing element width is 5-10mm.

Also setting is sealed between second shell 13 and enclosure body 12, which can play water proof and dust proof Effect, specifically, between second shell 13 and enclosure body 12 be arranged sealing element W.Second shell 13 and enclosure body 12 Between sealed set it is similar to the sealed set between first shell 11 and enclosure body 12.

As other embodiment, when sealing element between first shell and enclosure body, enclosure body and second shell Sealing ring can be selected in W, and first shell and enclosure body, enclosure body and second shell adopt the mode being screwed.

The heating core of electric heater 100 is heating element 6, and electric heater 100 includes at least a heating element 6, is passed Towards the fluid cavity 2, first side of heat conductive wall 1221 is one for forming the fluid cavity for the first side of hot wall 1221 Bulkhead portion, the heating element 6 are located at the side that the heat conductive wall 122 deviates from the fluid cavity, heating element 6 and heat conductive wall The part of 122 contacts is not connected to fluid cavity 2, and heating element 6 is located at the opposite sides of cover board 24, heating unit with control module 5 Part 6 and fluid cavity 2 are located at the same side of cover board 24, and specifically, heating element 6 is at least partially disposed at the first side of heat conductive wall 1221 i.e. between fluid chamber bottom and second shell 13, more specifically, heating tube, PCT, Electric radiant Heating Film can be used in heating element 6 Equal heating methods, in the embodiment shown in Fig. 1-Figure 28, heating element 6 uses heating tube, and heating element 6 is at least partly Between the first side of heat conductive wall 1221 and the second side of heat conductive wall 1222, specifically, heating element 6 uses U-shaped heating Pipe, which is the heating wire (resistance wire) that spiral shape is put into metal tube, and around and gap section be filled with it is good There is eduction rod or lead-out wire to pick out for the insulating powder such as MgO of good heat resistance, thermal conductivity and insulating properties, heating wire both ends, should Heating tube has many advantages, such as simple structure, high mechanical strength, safe and reliable, simple installation, long service life.As other realities Mode is applied, other shapes of heating tube, such as L shape can be used in heating element.Heating element 6 can pass through inlay casting or welding Mode and enclosure body 12 to be joined together to form fever whole, specifically, in the embodiment shown in Fig. 1-Figure 28, Heating element number is 3, heating element 6 be at least partially disposed at heat conductive wall the first side 1221 and the second side 1222 it Between, heating element 6 is at least partially disposed at enclosure body groove 1223, and heating element 6 includes heating element tube body 61 and heating tube Contact portion 62, heating element tube body 61 are at least partially disposed at enclosure body groove 1223, and heating tube contact portion 62 is heating element 6 leading-out wire part, heating element 6 can be electrically connected by heating tube contact portion 62 with other components.Heating element 6 and shell Body ontology 12 is integrally formed by way of die casting, avoids heating element 6 and is directly contacted with working media, is reduced The security risks such as electric leakage, short circuit as caused by 6 wall defects of heating element；Further, heating tube and enclosure body pressure It casts integrally formed, phenomena such as air occurs in this way, avoiding between heating element and enclosure body binding site, it is opposite to improve The heating condition of heating element, avoids the appearance of localized hyperthermia, as other embodiment, heating element 6 and shell sheet The non-integral forming of body, enclosure body have groove, and heating element is at least partially disposed at groove and is fixedly installed with enclosure body. Heating tube contact portion 62 is flat in the embodiment shown in Figure 13, as other embodiment, heating tube contact portion 62 Bending up and/or down.

Electric heater 100 includes fluid cavity 2, and working media can be heated in fluid cavity 2, which can Think that liquid or liquid-vapor mixture, electric heater 100 include the first afflux area 21, shunting zone 22, the second afflux area 23, lid Plate 24, the second wall 120, heat-conducting part 26 and fluid cavity, fluid cavity 2 include the first side of heat conductive wall 1221, cover board 24 and the The space that one wall 121 is formed, cover board 24 is a part of wall portion for forming fluid cavity 2.Wherein, the first afflux area 21, the second afflux Area 23 is located at the opposite sides of heat-conducting part 26, and the first afflux area 21, shunting zone 22 and the second afflux area 23 are connected, First afflux area 21 is connected with import 81, and the second afflux area 23 is connected with outlet；Cover board 24 and the sealing of the first wall 121 are solid Fixed setting, specifically, is sealed fixed setting or cover board and the first wall by welding manner between cover board and the first wall Between by sealing ring sealed set, by bolt, perhaps setting or cover board is fixed in screw and the second wall passes through sealing Glue sealing fixed setting.As other embodiment, cover board and the fixed setting of the first wall or cover board and the first wall, the second wall Fixed setting.It is sealed setting between cover board 24 and the first wall 121, which has prevent work to a certain extent Make the effect that medium is revealed by cover board 24, specifically, cover board 24 and the first wall 121 pass through welding and are sealed fixed setting, the One wall 121 can directly be contacted with working media, and specifically, the first wall 121 and enclosure body 12 are integrally formed, at least partly First wall 121 is not contacted with mounting wall 1211, the first wall 121 include with combining harmoniously 1210, should be with combining harmoniously at least partly with first Wall 121 does not contact.

Electric heater 100 includes heat-conducting part 26, and heat-conducting part 26 has the work for the also contacts area for increasing working media With heat-conducting part 26 and the fixed setting of heat conductive wall 122 or heat-conducting part 26 are fixedly installed with cover board 24, and heat-conducting part 26 is located at cover board Between 25 and heat conductive wall 122, heat-conducting part 26 and isolation part 3 are located at the opposite sides of cover board 24, heat-conducting part 26 and fluid cavity 2 In the same side of cover board 24, specifically, heat-conducting part 26 and enclosure body 12 are integrally formed.Cover board 24 include first side 241, Second side 242, protrusion 243, radiating part 244, strip projected parts 245, third fixed part 246, the 4th positioning region 247, mounting groove 248 and Thermal Cutoffs 249, wherein first side 241 is away from fluid cavity towards first shell 11,242 court of second side Deviate from first shell 11 to fluid cavity, protrusion 243 towards fluid cavity direction protrusion, protrusion 243 at least partly with 26 phase of heat-conducting part It abuts, strip projected parts 245 are located at first side 241 and are arranged towards the direction protrusion of first shell 11, third positioning region 246 Positioned at the opposite sides of strip projected parts, the 4th positioning region 247 is matched with isolation part；Radiating part 244 is located at second side 242 And towards fluid cavity 2, the protrusion setting of heat conductive wall 122, strip projected parts 245 match with drive module 4, Thermal Cutoffs 249 to Small part is located at mounting groove 248.As other embodiment, mounting groove is located at isolation part, and Thermal Cutoffs is at least partially disposed at Mounting groove.

Heat-conducting part 26 protrudes from the setting of heat conductive wall 122, and is located at the same side of cover board 24 with fluid cavity 2, and heat-conducting part 26 Between heat conductive wall and cover board 24, heat-conducting part 26 and heat conductive wall is integrally formed or fixed setting, material used in heat-conducting part 26 with Heat conductive wall is same or different, and in order to be conducive to conduct heat, heat-conducting part 26 uses metal and the good alloy of heating conduction.One side Face heat-conducting part 26 can relatively increase heat transfer area, be conducive to improve by the heat transfer of heating element 6 to working media Heat transfer efficiency；On the other hand the operating temperature for advantageously reducing heating element 6 is conducive to the work item for improving heating element 6 Part is conducive to extend the working time of heating element.Figure 20 is please referred to, import 81, outlet 82 are located at the ipsilateral of electric heater, Electric heater 100 includes the first afflux area 21, the second afflux area 23, third afflux area 28 and heat-conducting part 26, the first afflux area 21, the second afflux area 23 is located at the opposite sides of heat-conducting part 26, and the first afflux area 21 is connected with the second afflux area 23, thermally conductive Portion 26 includes at least two the first heat-conducting parts 261, and adjacent first heat-conducting part 261 does not contact.Electric heater 100 further includes heating Channel, the space between adjacent first heat-conducting part 261 are a part for heating channel.Electric heater includes fluid cavity import 211 With fluid cavity outlet 231, it is the entrance of fluid cavity that fluid cavity import 211, which is located at the first afflux area 21,；Fluid cavity exports 231 In the outlet that the second afflux area 23 is fluid cavity, fluid cavity import 211 is connected with import, fluid cavity outlet 231 and outlet phase Connection, working media enter fluid cavity 2 by fluid cavity import 211, and at the first afflux area 21 and to shunting, work is situated between Matter is converged after shunting in the second afflux area 23 again.Adjacent first heat-conducting part 261 is arranged in parallel, and is arranged in parallel herein Including 0~10 degree of coverage error.Heating channel has interchannel away from least partially or fully between adjacent first heat-conducting part Interchannel away from equal, interchannel refers to first away from the equivalent distance referred between adjacent first heat-conducting part 261, equivalent distance Heat-conducting part has projection to heat conductive wall, the average distance between adjacent first heat-conducting part projection.Electric heater 100 adds including first Hot-zone 29 and the second heating zone 210, the first heating zone 29 have first passage spacing, and the second heating zone 210 has second channel Spacing, when adjacent first heat-conducting part interchannel each in the first heating zone 29 away from it is equal when, first passage spacing be equal to first plus Equivalent distance in hot-zone 29 between any adjacent first heat-conducting part；When adjacent first heating each in the first heating zone 29 is logical Portion's interchannel away from it is unequal when, first passage spacing, which refers to, works as span between the first heat-conducting part adjacent in the first heating zone From minimum value；Similarly, when adjacent first heat-conducting part interchannel each in the second heating zone 210 away from it is equal when, first passage Spacing is equal to the equivalent distance in the second heating zone 210 between any adjacent first heat-conducting part；When each in the second heating zone 210 A adjacent first heat logical portion's interchannel away from it is unequal when, first passage spacing refers to that in the first heating zone, adjacent first leads The minimum value of equivalent distance between hot portion；First passage spacing is greater than second channel spacing, and the first heating zone 29 to the second adds Hot-zone 210 is closer to the first afflux area.Specifically, first passage spacing is greater than two times of second channel spacing and (does not ignore herein The thickness of first heat-conducting part itself), it is relatively low close to 211 working media temperature of fluid cavity import in the first heating zone 29, In the identical situation of 6 temperature of heating element, the larger heat transfer effect of temperature gradient is preferable, therefore in the first heating zone, and first Interchannel is away from larger；In the second heating zone 210, since close to fluid cavity outlet 231, working media passes through the first heating zone After being heated, temperature gradient reduces, and heat transfer effect relative reduction, second channel spacing is smaller, heat exchange area is opposite increase from And be conducive to heat transfer effect；First heating zone 29, away from different settings, advantageously allows to flow from 210 interchannel of the second heating zone Working media uniformity of temperature profile in body cavity, the phenomenon that avoiding localized hyperthermia.It is led in the first heating zone 29, adjacent described first Interchannel between hot portion away from equal, and/or, second heating zone 210, the channel between adjacent first heat-conducting part Spacing is equal.Electric heater 100 includes third afflux area 28, and third afflux area 28 is located at the first afflux area 21 and the second afflux Between area 23, third afflux area 28 is connected with the first afflux area 21, the second afflux area 23, and working media is by the first heating After area's heating, after in third afflux area, mixed flow shunts again, continue to heat into the second heating zone.In order to enable working media exists Third afflux area is more sufficiently mixed, and the first heat-conducting part positioned at the second heating zone 29 is from close to the one of second heating zone 210 End, along the first heating zone be directed toward the second heating zone direction extend, be formed with extension, the extension be located at described second First heat-conducting part of heating zone is not exclusively overlapped.

First afflux area 21 is arranged in parallel with the second afflux area 23, herein, the range mistake including 0~10 degree is arranged in parallel Difference.First afflux area 21 has the bending of wedge angle or radian far from one end of fluid cavity import 211, i.e. the first afflux area 21 is remote For one end actual internal area from population portion less than the actual internal area of the first afflux area fluid cavity import 211, setting in this way is advantageous In the generation for avoiding working media dead angle area.Similarly, one end that the second afflux area 23 is exported far from fluid cavity have wedge angle or The bending of person's radian, i.e. one end actual internal area that the second afflux area 23 is exported far from fluid cavity is less than the second afflux area fluid cavity The actual internal area of outlet.

First heat-conducting part 261 includes two symmetrical composition faces, this two symmetrical faces that constitute are plane or curved surface. Two symmetrical composition faces make 261 two composition surface side heating surface (area) (HSs of the first heat-conducting part roughly the same or close, are conducive to Working media temperature is uniformly distributed.First heat-conducting part 261 includes two symmetrical composition faces, this two symmetrical faces that constitute are flat Face, herein plane include due to the non-planar situation in manufacturing process error range, and this two symmetrical to constitute faces parallel Setting, is arranged in parallel the error range including 0~10 degree herein, and the composition face of adjacent first heat-conducting part is also parallel to each other, and first Heat-conducting part is vertically arranged with the first afflux area, the second afflux area, is vertically arranged the error range including 0~10 degree herein.When So, as other embodiment, heat-conducting part 26 includes the second heat-conducting part, and the second heat-conducting part shape and the first heat-conducting part are substantially Identical, the second heat-conducting part and the first heat-conducting part are of different sizes, and the first heat-conducting part is located at the first heating zone, and the second heat-conducting part is located at Second heating zone.

Figure 22 is please referred to, Figure 22 shows heat-conducting part and relevant portion second embodiment, and electric heater includes the first heat-conducting part 261c.First heat-conducting part 261c includes two parallel composition faces, this two parallel composition faces at least one constitute face and the One afflux area, the second afflux area have angle, and the range of the angle is greater than 0 degree less than 90 degree.

Figure 23 is please referred to, Figure 23 shows heat-conducting part and relevant portion 3rd embodiment, and electric heater includes the first heat-conducting part 261d, the first heat-conducting part 261d include wave crest and trough, and wave crest and trough are arranged alternately, the adjacent first heat-conducting part wave crest It is correspondingly arranged, the interchannel between the first adjacent heat-conducting part 261d is away from can be same or different.

Figure 21 is please referred to, import, outlet are located at the same or different side of electric heater, the first afflux area and the second collection The intersection setting of stream area or first throttle area are arranged in parallel with the second afflux area part, part intersection setting, intersection herein Be arranged and refer to not parallel setting (error range including ± 10 degree is arranged in parallel in this).First heat-conducting part 261f is by the first afflux Area 21f extends to the second afflux area 22f, and the first heat-conducting part 261f has bending, and specifically, the first heat-conducting part 261f is substantially at L Type, adjacent first heat-conducting part 261f are not contacted, and the first heat-conducting part 261f ' is from the first afflux area 21f ' to the second afflux area 22f ' Extending, the first heat-conducting part 261f ' has bending, specifically, and the first heat-conducting part 261f ' substantially l-shaped, adjacent first heat-conducting part 261f ' is not contacted.

Please referring to Figure 24, it includes the first heat-conducting part 261a and the second heat-conducting part 262a that Figure 24, which shows heat-conducting part 26a, and first Heat-conducting part 261a is not contacted, the sky between adjacent heat-conducting part between the second heat-conducting part 262a between adjacent heat-conducting part 26a Between for heating channel a part, the first heat-conducting part 261a, the second heat-conducting part 262a are from the first afflux area 21a to the second afflux Area 22a is extended.In embodiment shown in first afflux area 21a, the second afflux area 23a and Figure 24 the first afflux area 21 and Second afflux area 23 has identical setting.Electric heater further includes fluid cavity import 211a and fluid cavity outlet 231a, fluid cavity Import 211a and fluid cavity outlet 231a are located at the first afflux area 21a and the second afflux area 23a.In order to enable work is situated between Matter Temperature Distribution is more uniform, and electric heater includes the first heating zone 29a and the second heating zone 210a, the first heating zone 29a ratio Second heating zone 210a is closer to the first afflux area 21a.First heat-conducting part 261a is located at the second heating zone 29a, the second heat-conducting part The part 262a is located at the first heating zone 29a, is partially located at the second heating zone 210a.

Heating channel has interchannel away from, interchannel away from referring between adjacent first heat-conducting part and/or the second heat-conducting part Equivalent distance, equivalent distance refer to that adjacent first heat-conducting part and/or the second heat-conducting part have projection to heat conductive wall, and adjacent first leads Average distance between hot portion and/or the projection of the second heat-conducting part.First heating zone 29a has first passage spacing, the second heating Area 210a has second channel spacing, when adjacent heat-conducting part interchannel each in the first heating zone 29a away from it is equal when, first is logical Road spacing is equal to the equivalent distance in the first heating zone 29a between any adjacent heat-conducting part；When each in the first heating zone 29a It is adjacent heat logical portion's interchannel away from it is unequal when, first passage spacing refers between heat-conducting part adjacent in the first heating zone The minimum value of equivalent distance；Similarly, when adjacent heat-conducting part interchannel each in the second heating zone 210a away from it is equal when, second Interchannel is away from the equivalent distance being equal in the second heating zone 210a between any adjacent heat-conducting part；When in the second heating zone 210a Each adjacent heat-conducting part interchannel away from it is unequal when, second channel spacing refers between heat-conducting part adjacent in the second heating zone Equivalent distance minimum value；First passage spacing is greater than second channel spacing, and the first heating zone 29a is than the second heating zone 210 Closer to the first afflux area.

Heat-conducting part 26a includes two symmetrical composition faces, and this composition face is a part of wall portion for heating channel, described Composition face is plane/curved surface, and there is an angle in the composition face and first afflux area, it is described at least one constitute face with it is described The angular range in the first afflux area is to be less than or equal to 90 degree greater than 0 degree, and the composition face and the second afflux area have angle, institute The angle unit for stating at least one composition face and second afflux area is to be less than or equal to 90 degree greater than 0 degree.First heat-conducting part 261a and the setting of the second interval heat-conducting part 262a, there are two the first symmetrical composition faces for the first heat-conducting part 261a tool (on figure not Show), there are two the second symmetrical composition face (being not shown on figure), the first, second composition face is the second heat-conducting part 262a tool Plane, the first, second composition face are vertically arranged with the first afflux area, are vertically arranged the error range including 0~10 degree herein, First, second composition face is arranged in parallel, the error range including 0~10 degree is arranged in parallel herein, first passage spacing is big In 2 times (heat-conducting part thickness itself is not ignored) of second channel spacing.

Please referring to Figure 25-Figure 25, heat-conducting part 26b includes the first heat-conducting part 261b and the second heat-conducting part 262b, and adjacent second Heat-conducting part 262b is symmetrical arranged.First heat-conducting part 261b is located at the second heating zone 29b, and the second part heat-conducting part 262b is located at the One heating zone 29b is partially located at the second heating zone 210b, and the second heat-conducting part 262b includes transition part 263b, transition part 263b Enable to adjacent second heat-conducting part in the interchannel of the first heating zone and the second heating zone away from difference.First heat-conducting part 261b Face is constituted including two symmetrical first, the second heat-conducting part positioned at the second heating zone includes two the second symmetrical structures At face, the second heat-conducting part positioned at the second heating zone includes that two symmetrical thirds constitute face, and first, second, third is constituted Face can be plane or curved surface.In the present embodiment, first, second, third face is constituted as plane, plane includes herein To be formed non-planar since manufacture craft limits, adjacent first, second, third composition face is arranged in parallel, and packet is arranged in parallel herein 0~10 degree of error range is included, the first, second, third composition face is vertically arranged with the first afflux area, is vertically arranged packet herein 0~10 degree of coverage error is included, first passage spacing is more than or equal to 2 times that second channel spacing is less than second channel spacing.

Electric heater 100 includes drive module 4, and drive module 4 can control the energization or power-off of heating element 6 State, drive module 4 and cover board 24 are fixedly installed, and drive module 4 is located at the opposite sides of cover board 24 with fluid cavity 2.Drive mould Block 4 can generate a large amount of heat when being worked, which to a certain extent can adversely affect drive module 4, in order to A part of heat that timely evacuation drive module 4 generates at work reduces the accumulation of heat, the setting heat dissipation of electric heater 100 The heat a part generated when working is passed to radiating part by portion 244, drive module 4, which generally uses heat transfer Mode, radiating part 244 directly contacts with working media, and radiating part 244 is generally positioned at working media input end, and work is situated between Matter inlet temperature is relatively low, can take away the heat of radiating part 244 to a certain extent and add to working media itself Heat.Specifically, Figure 15 is please referred to, one or more radiating part 244 is arranged in cover board second side 242, which leans on Nearly import.

Electric heater 100 includes at least a radiating part 244, and radiating part 244 can radiate for drive module 4, dissipate The material in hot portion 244 is metal or has good heating conduction alloy.Radiating part 244 is corresponding with the position of strip projected parts Setting, drive module 4 and the position of strip projected parts are correspondingly arranged.It is solid including radiating part to please refer to Figure 15 and Figure 16 radiating part 244 Determine portion 2441 and radiating part free end 2442, radiating part 244 and cover board 24 are fixedly installed, specifically, radiating part 244 and cover board 24 is integrally formed.Cover board 24 includes strip projected parts 245, and strip protrusion 245 is located at fluid cavity first side 242 and away from fluid Setting is protruded in the direction of chamber, and radiating part 244 is correspondingly arranged with 245 position of strip protrusion.Drive module 4 can be solid by third Determine portion 246 to fix with 241 phase of cover board first side.In order to enable drive module 4 and cover board first side 241 are fitted close, Heat conductive insulating element is set between drive module 4 and cover board first side 241, which can play insulation and lead The effect of heat, such as heat conductive insulating pad, heat-conducting glue, conduction oil.Radiating part 244 is located at fluid cavity second side 242 and to fluid Chamber protrusion setting, radiating part free end 2442 is located at the first afflux of fluid cavity area 21, the first afflux area 21 and heater inlet phase Connection.244 one side of radiating part can play the role of radiating for drive module 4, and on the other hand, radiating part 244 is certain It will increase the flow resistance of working media in degree, in order to minimize this part flow resistance, radiating part free end 2442 and heat conductive wall the All contact is not that radiating part free end 2442 does not contact all with shell for one side 1221；Fluid cavity 2 further includes heat-conducting part 26, radiating part free end 2442 is not also in contact with heat-conducting part 26.Radiating part 244 have certain height, the height be by Radiating part fixed part 2441 arrives the vertical range of radiating part free end 2442, and fluid cavity has height, and the height of fluid cavity refers to Maximum normal distance between the second side of heat conductive wall 1222 and fluid cavity second side 242.Figure 15-Figure 16 is please referred to, is being schemed In embodiment shown in 15- Figure 16, the shape of radiating part 244 is cylinder, and cylinder opposite to a certain extent can subtract Few flow resistance itself generated to working media, as other embodiment, the shape of radiating part 244 can be elliptical cylinder-shape etc..When When the shape of radiating part 244 is cylindrical, 244 outer diameter of radiating part can be taken as 2-4mm.Preferably to radiate and reducing flow resistance, Radiating part 244 has certain arrangement.Cover board 24 has reference line, and the reference line is parallel with the first wall of part, in Figure 15-figure In embodiment shown in 16, the reference line is parallel with the second bulkhead 1212,245 corresponding position cover board second side of strip projected parts Radiating part 244 is arranged in face 242, and radiating part 244 is cylinder, and multiple radiating parts 244 are substantially arranged with reference line in 30 degree of angles Cloth, certain angle can be other numerical value, it is preferred that the angular range of multiple arrangements of radiating part 244 and reference line is 20- Between 70 degree, specifically, which can be the integer values angles such as 25 degree, 30 degree, 35 degree, 40 degree, 45 degree, 50 degree, 55 degree, 60 degree Degree.Electric heater 100 includes at least three thermal columns, and two neighboring radiating part has distance of center circle, the two neighboring thermal column center of circle Away from the distance for referring to the two neighboring thermal column fixed part bottom surface center of circle, the distance of center circle range of two neighboring thermal column is 4-7mm. Specifically, the number range of thermal column is 35-120.Electric heater 100 includes the first area and second area, the first area Refer to the projected area of the contact area for referring to the drive module and the cover board or drive module to the cover board, second Area refers to that radiating part and the discontiguous area of the cover board, second area and first area have ratio, second area It is that 3-4.5 is conducive to radiating part 244 in this range ratio range with the second area and first area ratio Heat spreading function.

Figure 15-Figure 16 is please referred to, electric heater 100 includes diversion division 27, and diversion division 27, which can play working media, to be drawn The effect of stream can promote working media to be evenly distributed in fluid cavity to a certain extent.Diversion division 27 is located at the first afflux Area, diversion division 27 include diversion division fixed part 271 and diversion division free end 272, fixed part 271 and 242 phase of cover board second side Fixed, specifically, diversion division 27 and cover board 24 are integrally formed, and diversion division free end 272 does not contact all with heat conductive wall 122, such as This setting is the flow resistance for opposite reduction diversion division 27 to working media.As other embodiment, diversion division and heat conductive wall Fixed setting, diversion division free end do not contact all with cover board, and specifically, diversion division is integrally formed with heat conductive wall.Diversion division 27 Including at least the first guide face 273, the first guide face of diversion division 273 and import have angle, and angular range is 30 degree of -60 degree, tool Body, the first guide face of diversion division 273 and import angle are 30 degree, 35 degree, 40 degree, 45 degree, 50 degree, 55 degree and 60 degree, In embodiment shown in Figure 15-Figure 16, the angle of the first guide face of diversion division 272 and import is 45 degree, specifically, work Medium enters fluid chamber by import, and reaches the first afflux area, when being not provided with diversion division 27, due to working media The case where the case where dynamics, fluid cavity may generate no working media close to inlet part or working media very little, it is The generation of such case is reduced, diversion division 27 is set.After working media enters fluid cavity by import, part working media stream It moves at the first guide face of diversion division, the water conservancy diversion through the first guide face of diversion division may be implemented to turn to, part working media flow direction Fluid cavity is close to entrance.More specifically, diversion division 27 further includes the second guide face 274 and third guide face 275, wherein Two guide faces 274 have angle with third guide face 275, and the range of the angle is to be less than or equal to 45 degree greater than 0 degree.Work is situated between Matter the case where being likely to occur local eddy currents after the first guide face of diversion division 273, the second guide face of diversion division 274 with lead Stream portion third guide face 275 has the function of reducing working media vortex.Above-mentioned first guide face, the second guide face and Three guide faces can be plane, convex surface and concave surface.Electric heater 100 includes installation space, which is located at least in installation Between wall 1211 and the first wall 121, installation space includes with combine harmoniously 1210, mounting wall 1211, first shell 11 and second shell The space that body 13 is formed.In the embodiment shown in figure 2, heating tube contact portion 62 is located at the installation space, more specifically, It combines harmoniously between 1210 and mounting wall 1211 along perpendicular to the direction combined harmoniously, heating tube contact portion 62 is located to match.

Cover board 24 using the materials such as metal and can thermal conductivity, cover board 24 directly contacts with working media, in order to avoid Control module 5 directly contacts the generation for generating the safety accidents such as electric leakage with cover board 24, sets between cover board 24 and control module 5 Isolation part 3 is set, isolation part 3 is at least partially disposed between cover board 24 and control module 5, and isolation part 3 can play insulation protection Effect, isolation part 3 generally use inorganic non-metallic material using high temperature resistant, the high molecular material of insulation or isolation part 3, and Not ceramic lamp, specifically, isolation part 3 use nylon, plastic or other material.Fig. 2-Figure 10 is please referred to, electric heater 100 includes leading Electric device 31, the conducting element 31 can be electrically connected with heating element 6, drive module 5, so as to by drive module 5 come The state of energization or the power-off of heating element 6 is controlled, specifically, conducting element material can be copper, aluminium etc.；Conducting element 31 Including the first contact portion 311, the second contact portion 312 and conducting element interconnecting piece (being not shown on figure), conducting element junction The first contact portion of conducting element 311 and the second contact portion of conducting element 312 are connected, the first contact portion of conducting element is enabled to 311 are electrically connected with the formation of the second contact portion of conducting element 312, wherein the first contact portion 311 is electrically connected with heating tube contact portion 62 It connects, the mode of the electrical connection can be welding or fixed setting；Second contact portion 312 is electrically connected with control module 5, this is electrically connected The mode connect can be welding or fixed setting.Fig. 2-Figure 10 is please referred to, isolation part 3 includes that isolation part body part (does not show on figure Out), isolation part body part includes the first side of isolation part 321 and the second side of isolation part 322,321 court of the first side of isolation part To control module 5, specifically, the first side of isolation part 321 is towards the first side towards electric-controlled plate, the second side of isolation part 322 Away from control module 5, specifically, the second side of isolation part 322 deviates from electric-controlled plate, towards fluid cavity.Isolation part body part also wraps Include evener 32 and bending part 33.Conducting element 31 is at least partially disposed at the second side of the first side of isolation part 321 and isolation part Between 322, specifically, the second contact portion of conducting element 312 is located at the first side of isolation part the first side of isolation part 321 and court 5 direction of control module protrusion setting；The first contact portion of conducting element 311 is located at bending part 33 and sets towards heating element 6 It sets, specifically, the first contact portion of conducting element 311 and heating tube contact portion 62 are fixedly installed, more specifically, conducting element the One contact portion 311 is welded with heating tube contact portion, and the second contact portion of conducting element 312 is located at the evener, conducting element the Two contact portions 312 are electrically connected with control module 5, and specifically, the first contact portion of conducting element 311 and control module 5 are welded.Every A contact groove 324 is included at least from portion 3, contact groove 324 is located at the first side of isolation part 311, and 31 part of conducting element is located at Contact groove 324；Isolation part 3 includes at least a spliced eye 325, and spliced eye 325 is located at the second side of isolation part 322, conductive element 31 part of part is located at spliced eye 325, and specifically, contact groove 324 is oppositely arranged with 325 position of spliced eye, also, contact groove 324 Number it is identical as the number of spliced eye 325.Contact groove 324 and spliced eye 325 can be by Thermal Cutoffs 249 and conductive elements 31 phase of part is fixed, and specifically, Thermal Cutoffs 249 includes Thermal Cutoffs extension, and Thermal Cutoffs extension protrudes into grafting Setting is contacted in hole 325 and with the conducting element being located in spliced eye 325, in order to preferably make Thermal Cutoffs 249 and lead 31 phase of electric device is fixed, and Thermal Cutoffs 249 is welded with 31 phase of conducting element, and contact groove 324 can be Thermal Cutoffs 249 Space corresponding with the welding offer of conducting element 31, in this way, conducting element 31 is connected with Thermal Cutoffs.As other realities Mode is applied, the direction bending of heating tube contact portion towards isolation part is arranged, and mutually fixes with the first contact portion of conducting element, this When, isolation part can not include bending part.As other embodiment, heating tube contact portion has bending, and bends towards isolation Portion, at this point, isolation part includes evener, i.e., isolation part does not include bending part.

Electric heater 100 includes at least a Thermal Cutoffs 249, and Thermal Cutoffs 249, which has, avoids electric heater dry It burning, improves the effect of the safety and reliability of electric heater, conducting element 31 is electrically connected with Thermal Cutoffs 249, so as to Enough so that Thermal Cutoffs 249 is electrically connected with heating element 6, and then the energized state of Thermal Cutoffs 249 can influence to heat The energized state of element 6, specifically, Thermal Cutoffs 249 is connected with heating element 6 and/or parallel connection.Please refer to Figure 17, Figure 17 It is that Thermal Cutoffs 249 with a kind of of heating element 6 is electrically connected schematic diagram, in Figure 17, each heating element 6 is connected a temperature Fuse 249 is spent, heating element 6 is connected with Thermal Cutoffs 249；As other embodiment, Figure 18, Tu18Shi are please referred to Thermal Cutoffs 249 is electrically connected schematic diagram with the another kind of heating element 6, in Figure 18, Thermal Cutoffs 249 and heating unit Part 6 is in parallel；As other embodiment, Figure 19 is please referred to, Figure 19 is another electricity of Thermal Cutoffs 249 and heating element 6 Connection schematic diagram, in Figure 19, portion temperature fuse 249 is connected with heating element 6, portion temperature fuse 249 and heating 6 parallel connection of element, i.e. Thermal Cutoffs 249 are connected with heating element 6 and parallel connection.It should be noted that in Thermal Cutoffs 249 When in parallel with heating element 6, electric heater 100 includes at least 2 heating elements 6.

Referring to FIG. 2, the first contact portion of conducting element 311 is electrically connected with heating tube contact portion 62, wherein conducting element One contact portion 311 and heating tube contact portion 62 are electrically conductive, and in order to improve dielectric strength, exhausted gorgeous component 3 includes extension 331, The extension 331 is located at bending part 33 and towards heating element 6, and the first contact portion 311 is than extension 331 closer to fluid cavity 2, specifically, the first contact portion of conducting element 311 is that conducting element first contacts between the first wall 25 and extension 331 Portion 311 is between fluid cavity 2 and extension 331, in this way, reducing heating tube contact portion 62 and surrounding danger of hazardous electrical discharges Problem.More specifically, the first contact portion 311 includes the first top (being not shown on figure), which stretches out towards shell 1 Portion 331 includes the second top 3311, and second top is towards shell 1, along perpendicular to 32 direction of evener, the second top 3311 Than the first top further from evener, 3311 to the first top of the second top is closer to shell, specifically, the first top direction Second shell 13, the second top 3311 is towards second shell 13, and 3311 to the first top of the second top is closer to second shell 13.Isolation part 3 further includes isolation part fixed part 323 i.e. the 5th fixed part, which enables to driving mould Block 4 is fixed with 24 phase of cover board, and specifically, drive module 4 uses insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) module, which can be solid by 323 phase of isolation part fixed part with cover board 24 It is fixed.

Electric heater 100 includes drive module 4, and drive module 4 is electrically connected with control module 5, heating element 6, drives mould Block 4 can control the state of energization or the power-off of heating element 6.Drive module 4 is located at 321 side of the first side of isolation part simultaneously It is fixed with cover board 24,3 phase of isolation part.In the embodiment shown in Figure 2, drive module 4 use IGBT module, drive module 4 with Control module 5 is connected, and is welded together as drive module 4 passes through with control module 5.Drive module 4 passes through isolation part Fixed part 323 is fixed on cover board strip projected parts 245.In order to enable drive module 4 fitted closely with cover board 24 contact it is good and So that insulating between drive module 4 and cover board 24, thermally conductive isolation part is set such as between drive module 4 and cover board strip projected parts 245 Heat conductive insulating pad, heat-conducting glue, conduction oil etc..Drive module 4 can generate heat during the work time, which is unfavorable for driving Module 4, cover board second side radiating part 244 are conducive to the heat dissipation of drive module 4, when electric heater 100 is worked, drive A part of heat transfer that dynamic model block 4 generates arrives radiating part 244, and radiating part 244 can directly be in contact with working media, stream Dynamic working media temperature is lower, can take away a part of heat of radiating part 244, so that reaching reduces by 4 temperature of drive module Purpose.

It should be noted that Metal-Oxide Semiconductor field-effect can be used in drive module 4 as other embodiment Transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) module.

Electric heater 100 includes control module 5, and in the illustrated embodiment, control module uses electric-controlled plate, control Between cover board 24 and first shell 11, control module 5 is located at fluid cavity 2 with heating element 6, cover board 24, is isolated module 5 The opposite sides in portion 3, control module 5 and isolation part 3 are located at the same side of cover board 24, fluid cavity 2, and control module 5 includes first Electric-controlled plate body part (being not shown on figure), the second electric-controlled plate body part 51 and the 6th fixed part 52, wherein the first electric-controlled plate Body part, towards isolation part 3, the second electric-controlled plate body part 51 deviates from isolation part 3, and the first electric-controlled plate body part is towards isolation part 3, the second electric-controlled plate body part 51 deviates from isolation part 3, and the 6th fixed part 52 is fixed with isolation part 3,24 phase of cover board.Electric heater 100 include the first safe distance, which refers to the distance between isolation part 3 and control module 5, first peace On the other hand on the one hand insulation performance that full distance can be improved isolation part 3 can be improved the security performance of electric heater 100. First safe distance refer between the first electric-controlled plate body part and the first side of isolation part the first side of isolation part 321 away from From the first safe distance is greater than 0, and generally, the first safe distance should be greater than being equal to 2mm, and specifically, the first safe distance is 3mm, 2.5mm, 2mm etc..Electric heater 100 further includes the second safe distance, and the second safe distance refers to control module 5 and Minimum range between one shell 11, in order to improve the safety of electric heater 100, the second safe distance is greater than zero, specifically Ground, the second safe distance are greater than 8mm, more specifically, the second safe distance value range is 6-8mm, specifically, first shell Ontology 111 includes first shell ontology inside and first shell outer body, wherein towards fluid on the inside of first shell ontology Chamber, first shell outer body deviate from fluid cavity, and the second safe distance refers to the second body part of control module 51 and first shell The distance between on the inside of ontology, more specifically, the second safe distance refers to the second body part of control module 51 and first shell ontology Minimum range between inside.

Electric heater 100 includes wire connecting portion 7, and wire connecting portion 7 is connected with effective power supply to be provided for electric heater 100 Electric power.Wire connecting portion 7 includes forceful electric power portion 71 and light current portion 72, and forceful electric power portion 71, light current portion 72 are electrically connected with control module 5, forceful electric power Portion 71 includes forceful electric power power part (being not shown on figure) and forceful electric power plug division (being not shown on figure), and forceful electric power power part is used for forceful electric power portion 71 are electrically connected with electric-controlled plate 5 Deng, and forceful electric power plug division is used to forceful electric power portion 71 being fixed on mounting wall, and light current portion 72 connects including light current Electric portion's (being not shown on figure) and light current plug division (being not shown on figure), light current power part are electric for light current portion 72 and electric-controlled plate 5 etc. Connection, light current plug division are used to light current portion 71 being fixed on mounting wall.Referring to FIG. 2, in the embodiment shown in figure 2, by force Electric portion 71, light current portion 72 and the sealing of mounting wall 1211 are fixedly installed, specifically, forceful electric power portion 71, light current portion 72 and mounting wall 1211 It is sealed by a seal ring setting, setting is fixed by screw, forceful electric power portion 71, light current portion 72 are located at electric heater 100 Same side.Forceful electric power portion 71 and light current portion 72 are at least partially disposed at installation space.Forceful electric power portion 71 can be directly connected to control mould On block 5, electric heater 100 includes pinboard 721, and pinboard 721 includes pinboard body part 7211, and transfer hole (is not shown on figure Out) and exit 7212.Exit 7212 protrudes from pinboard body part 7211, and specifically, exit 7212 protrudes from whole Body portion 7211 is simultaneously arranged towards electric-controlled plate.The pinboard 721 enables to light current portion 72 to be electrically connected with control module 5.Specifically Ground, pinboard 721 are electrically connected with light current portion 72, and connection type can be grafting, have transfer hole, light current on pinboard 721 at this time There is exit in portion 72, and light current portion exit is inserted into 721 transfer hole of pinboard, has adapter pin on pinboard 721, which inserts Needle can be welded with control module, so that light current portion is connected with control module；Or pinboard 721 and light current Rotor 72 is linked together by modes such as welding, and pinboard 721 has adapter pin, and adapter pin is electrically connected with control module 5 It connects, such as welds.Pinboard 721 has fixed part, can be fixed together by the modes such as screw and the assembling of enclosure body 12.Make For other embodiment, light current portion 72 is directly connected to control module 5, and connection type is welding etc..Pinboard 721, which has, to be turned Fixed part is connect, pinboard 721 is fixed by switching fixed part 7211 with 12 phase of enclosure body, and specifically, pinboard fixed part is logical It crosses screw and is mutually fixed with enclosure body.

In the embodiment shown in Fig. 2-Figure 21, forceful electric power portion 71 and light current portion 72 are located at the same side of electric heater, In other embodiments, forceful electric power portion 71 and light current portion 72 can be located at the not ipsilateral of electric heater.Fig. 2-Figure 21 is please referred to, Forceful electric power portion 71 and low-voltage terminal 72 are located at the same side of electric heater.When electric heater 100 is installed, forceful electric power portion 71 by It is installed on the inside of lateral electric heater 100 outside electric heater 100, the space of required installation is smaller, and light current portion 72 is by electric heating To being installed on the outside of electric heater 100 in device 100, the space of required installation is larger, therefore, the setting peace of mounting wall 1211 Fill wall lug boss 12111, mounting wall lug boss 12111 towards person away from the fluid cavity, away from combining harmoniously 1210, along perpendicular to With combine harmoniously 1210 direction protrusion setting.Lug boss 12111 includes second first 1211a of lug boss, lug boss 1211b And lug boss 1211c, along being parallel to 1210 directions of combining harmoniously, second 1211b of lug boss is located at lug boss first Between 1211a, lug boss third portion 1211c, second 1211b of lug boss 1210 is arranged in parallel with combining harmoniously, and sets in parallel herein Setting the error range including ± 10 degree, first 1211a of lug boss, lug boss 1211c 1210 are vertically arranged with combining harmoniously, this Place is vertically arranged the error range including ± 10 degree.Mounting wall 1211 further includes forceful electric power portion mounting portion 1211d, lug boss third With first 1211a that combine harmoniously closer to forceful electric power portion mounting portion 1211d, forceful electric power portion mounting portion 1211d's portion 1211c ratio combines harmoniously with matching 1210 are vertically arranged.Electric heater 100 includes installing zone, and installing zone includes mounting wall and with the space between combining harmoniously, such as Fig. 2 Shown in embodiment, import, outlet are located at the same side of electric heater, have between import and fluid cavity import and be connected to chamber, Have between outlet and fluid cavity outlet and be connected to chamber, the installing zone do not include connection chamber between import and flowing lumen import, Connection chamber between outlet and fluid cavity outlet.Installing zone can provide space for forceful electric power portion, the installation of light current portion.Installing zone is A part of installation space.

Electric heater 100 includes import 81 and outlet 82, and import 81, outlet 82 are connected with fluid cavity.Referring to FIG. 2, Import 81 and outlet 82 are located at 100 same side of electric heater, and are located at same side with forceful electric power portion 71 and light current portion 72, as it Its embodiment, it is not ipsilateral that inlet and outlet is located at electric heater.

Electric heater 100 includes air hole 9, which has so that pressure is consistent inside and outside electric heater 100 Effect.Opposing seal is carried out with ventilative pore membrane on air hole 9, which enables to air by being unable to make Water or other media pass through, which has simply and easily effect.As other embodiment, air hole can also pass through Sealing-plug is sealed, and rubber stopper etc. can be selected in sealing-plug, and sealing-plug also has so that pressure is kept inside and outside electric heater 100 Consistent effect.In Fig. 2, embodiment shown in Fig. 3, air hole 9 is located at enclosure body, as other embodiment, breathes freely Hole is located at first shell, and air hole penetrates first shell, and air hole is not connected to fluid cavity, alternatively, air hole is located at second shell Body, air hole penetrate second shell, and air hole is not connected to fluid cavity.Air hole, which has, keeps pressure one inside and outside electric heater The effect of cause, air hole are located at least in first shell, second shell and enclosure body, and air hole is not connected to fluid cavity.

Figure 27-Figure 28 is please referred to, Figure 27-Figure 28 shows second of embodiment of electric heater.Shown in Figure 27-Figure 28 Second of embodiment in, electric heater 100e include enclosure body 12e, fluid cavity 2e, drive module 4e, electronic control module 5e, Heating element 6e, forceful electric power portion 71e, light current portion 72e import 81e and outlet 82e, wherein enclosure body 12e, body cavity 2e, driving Module 4e, electronic control module 5e, heating element 6e, forceful electric power portion 71e, light current portion 72e, import 81e and outlet 82e and first are real It is same or similar to apply corresponding part in example.It is different from the first embodiment, the insulation of isolation part non-air in electric heater 100e Material, such as insulating polymeric material, isolation part include at least the first separation layer, which is at least partially disposed at cover board Between control module.Specifically, the first separation layer uses the megohmite insulant of non-air, such as insulating polymer material, specifically Ground, such as insulating cement, insulation spacer, insulating paper, the non-air megohmite insulant can be sprayed, be electroplated, coat, paste, be covered Mode contacts setting with the substance to insulate is needed.As other embodiment when the first separation layer uses non-air class insulant When matter, it is possible that the first isolation fault rupture or damaged bring danger of hazardous electrical discharges, are during electric heater use Avoid the generation of this kind of danger, isolation part includes at least the first separation layer and the second separation layer, the second separation layer and first every Absciss layer material can be same or different, when isolation part include at least the first separation layer and the second separation layer when, the first separation layer with The accessible setting of second separation layer does not contact setting, and specifically, the first separation layer contacts setting with cover board, as first every Absciss layer sprays on the cover board, and second insulating layer contacts setting with electric-controlled plate, and such as the second separation layer is sprayed on electric-controlled plate, and first Separation layer and the second separation layer are accessible or do not contact setting, when the first separation layer and the second separation layer do not contact setting, It is air between first separation layer and the second separation layer, at this point, air also functions to the effect of insulation.

Electric heater 100e includes cover board 24e, and cover board 24e is identical as electric heater first embodiment 24 structures of cover plate Or it is similar (similar herein to refer to cover board 24e with cover board 24 the difference is that fixed part etc., the small differences do not influence cover board Mass action).Electric heater 100e includes the first safe spacing, first safe spacing refer to cover board 24e and electric-controlled plate 5e it Between distance, specifically, the first safe spacing refers to cover board 24e first side and the second body part of electric-controlled plate (towards cover board The side 24e) minimum range, the first safe spacing be greater than 0, in the present embodiment, the first safe spacing be more than or equal to 1mm, such as 2mm, 3mm5mm etc., more specifically, the first safe spacing is more than or equal to 5mm when electric heater does not include isolation part.Relatively Ying Di is different from the first embodiment, and electric heater 100e includes protection circuit, which includes at least a temperature and protect Dangerous silk 91e and circuit element 92e, Thermal Cutoffs 91e, which have, avoids electric heater dry combustion method, improves the safety of electric heater The effect of property and reliability, circuit element 92 can be by Thermal Cutoffs 91e and heating element 6e, control module 5e and drive Dynamic element 4e electrical connection.Figure 27 is please referred to, in diagrammatically shown embodiment, circuit element 92e uses the shape of circuit board The problem of formula, circuit board and control module are located at the opposite sides of the second side, and this avoid electric heater inside cablings, So that electric heater 100e internal structure is more compact and safe, and reduces process in production process, production effect is improved Rate, the automation of line easy to produce.Between the heat conductive wall that Thermal Cutoffs 91e is located at and second shell 13e, specifically, temperature Fuse 91e and the second side of heat conductive wall are fixedly installed, more specifically, electric heater 100e includes Thermal Cutoffs fixed part 911e, Thermal Cutoffs fixed part 911e enable to Thermal Cutoffs 91 mutually to fix with the second side of heat conductive wall, specifically The fixed mode of screw can be used in ground；Circuit board includes circuit board recess, and the groove is for accommodating and being convenient for Temperature protection Silk and circuit board electrical connection.It should be noted that circuit element 9e uses the form of conducting wire, this is led as other embodiment Line is electrically connected with heating element, control module, and place in place is fixed.Heating element 6e and Thermal Cutoffs 91e Electric connection mode such as first embodiment in heating element 4 and Thermal Cutoffs 91e electric connection mode.With first embodiment Difference, in second embodiment, first shell 11e does not include the first protrusion and the first recessed portion.Electric heater 100e further includes Second safe spacing, the second safe spacing refer to the distance between second shell 13e and circuit element 92e, specifically, second Safe spacing refers to second shell 13e towards the side of circuit element 92e and circuit element 92e towards the one of second shell 13e Minimum range between side, in order to avoid leaky occurs in electric heater 100e, the second safe spacing is greater than zero.It is illustrating Embodiment in, heating element 6e uses heating tube, and heating tube 6e includes heating tube the first contact portion 61e and heating tube the Two contact portion 62e, the first contact portion of heating tube 61e stretch out upwards to be fixedly installed with electric-controlled plate 5e, specifically, heating tube first Contact portion 61e is welded with electric-controlled plate, and the second contact portion of heating tube 62e is fixedly installed with circuit element 92e downwards, specifically Ground, the second contact portion of heating tube 62e are welded with circuit element 92e downwards, in this way, heating tube and electric-controlled plate 5e, circuit elements Part 92e realizes connection.

Electric heater 100e includes inlet tube 811e and outlet (being not shown on figure), and inlet tube 811e is connected to import 81e With fluid cavity import, outlet connection outlet and fluid cavity outlet, specifically, inlet tube 811e, outlet and enclosure body 12e is integrally formed, such as it is casting integrated forming, 3D printing is integrally formed, machining is integrally formed, in order to be more advantageous to import The forming of pipe 811e, outlet, inlet tube have an inclination angle beta, the value range of inclination angle beta be more than or equal to 0 degree, it is small In equal to 4 degree.The tilt angle refers to the angle for deviateing import tube hub line by import 81e to fluid cavity import 211e.It please join Examine Figure 28, Figure 28 is a sectional view of inlet tube 811e, and X is the center line of inlet tube 811e, X ' be it is parallel with X and with into The line of mouth intersection.Similarly, outlet inclination angle beta.

It should be understood that above embodiments are merely to illustrate the present invention and not limit technical side described in the invention Case, such as "inner", "outside" "vertical" " vertical " isotropy are defined, although this specification is referring to the above embodiments pair Present invention has been detailed description, still, those skilled in the art should understand that, the skill of technical field Art personnel still can be combined with each other the present invention, modify or equivalent replacement, and all do not depart from spirit of the invention With the technical solution and its improvement of range, should all cover in scope of the presently claimed invention.

Claims

1. a kind of electric heater, the electric heater is used for vehicle, including enclosure body, control module, forceful electric power portion and light current Portion, the forceful electric power portion, light current portion are electrically connected with the control module, the enclosure body include mounting wall with combining harmoniously, it is described Electric heater includes installing zone, and the installing zone includes the mounting wall and the space between combining harmoniously, the light current portion, The light current portion and the mounting wall are fixedly installed, and the mounting wall includes lug boss, and the lug boss is matched towards away from described The direction combined harmoniously protrudes out setting, and the lug boss includes lug boss first, lug boss second and lug boss third portion, edge Be parallel to it is described with direction of combining harmoniously, the lug boss second position in the lug boss first and lug boss third portion it Between, the installing zone includes the space that lug boss first, lug boss second and lug boss third portion are formed.

2. electric heater as described in claim 1, which is characterized in that the lug boss second with described with parallel set of combining harmoniously It sets, the lug boss first is vertically arranged with described with combining harmoniously, and lug boss third portion is vertically arranged with described with combining harmoniously, Heating element, the mounting wall include forceful electric power mounting portion, and the forceful electric power portion and the mounting wall are fixedly installed, the lug boss the Three than the lug boss second closer to the forceful electric power mounting portion, the forceful electric power mounting portion is parallel with the auxiliary section to be set It sets, the forceful electric power portion is electrically connected with the control module, the heating element.

3. electric heater as claimed in claim 1 or 2, which is characterized in that the electric heater includes pinboard, the control Module uses electric-controlled plate, and the pinboard is electrically connected with the light current portion, and the pinboard is electrically connected with the electric-controlled plate, described Pinboard includes transfer hole, exit and pinboard ontology, and the transfer hole and the light current portion are fixedly installed, the extraction End protrudes from the pinboard and is arranged in cantilever, and the exit and the electric-controlled plate/light current portion are fixedly installed.

4. electric heater as claimed in claim 3, which is characterized in that the electric heater includes isolation part, the isolation part It is fixedly installed with the control module, the isolation part includes isolation part body part, and the isolation part body part includes isolation part The second side of first side and isolation part, first side of isolation part is towards the electric-controlled plate, second side of isolation part Away from the electric-controlled plate, the electric heater includes conducting element, and the conducting element is at least partially disposed at the isolation part Between the second side of one side and the isolation part, the conducting element includes the first contact portion and the second contact portion, and described the One contact portion and the heating element are fixedly installed, and second contact portion and the control module are fixedly installed.

Preferably, the heating element uses heating tube, and the heating tube includes heating tube contact portion, along perpendicular to the cooperation Wall direction, the heating tube contact portion be at least partially disposed at the mounting wall and with combining harmoniously between, the isolation part includes smooth Portion and bending part, the bending part are arranged towards the heating tube bending, and first contact site of conducting element is in the folding Turn of bilge, first contact portion and the heating tube contact portion are fixedly installed.

Preferably, the electric heater includes heat conductive wall and cover board, and the heat conductive wall includes the first side, the electric heater packet Fluid cavity is included, towards the fluid cavity, first side of heat conductive wall is to form the fluid cavity for first side of heat conductive wall A part of wall portion, the heating element be located at the heat conductive wall deviate from the fluid cavity side, the fluid cavity with it is described Heating element is located at the same side of the cover board, and first side of heat conductive wall is towards the fluid cavity, the heat conductive wall first Side, at least partly described cover board are a part of wall portion to form the fluid cavity, and the cover board seals admittedly with described with combining harmoniously Fixed setting.

5. electric heater as described in any one of claims 1-3, which is characterized in that the electric heater include circuit element, Heat conductive wall, cover board and isolation part, the heat conductive wall include the first side, and the electric heater includes fluid cavity, the heat transfer For the first side of wall towards the fluid cavity, first side of heat conductive wall is a part of wall portion to form the fluid cavity, described Heating element is located at the side that the heat conductive wall deviates from the fluid cavity, and the isolation part and the fluid cavity are located at the cover board Opposite sides, the circuit element and the fluid cavity are located at the opposite sides of the heat conductive wall, the circuit element and institute State heating element, control module electrical connection, the isolation part be at least partially disposed at the cover board and the control module it Between, the isolation part includes at least the first separation layer, and first separation layer is insulating polymeric material.

Preferably, the electric heater includes Thermal Cutoffs, and the heat conductive wall includes the second side, and second side deviates from The fluid cavity, second side are oppositely arranged with first side, the Thermal Cutoffs and the heating element position Opposite sides in second side, the Thermal Cutoffs and the heating element series/parallel.

6. electric heater as described in claim 4 or 5, which is characterized in that the heating element uses heating tube, and the electricity adds Hot device includes enclosure body, the enclosure body and the casting integrated forming of the heating tube.

7. electric heater as claimed in claim 4, which is characterized in that the electric heater includes Thermal Cutoffs, the temperature Fuse and the heating element series/parallel are spent, the Thermal Cutoffs is between the cover board and the electric-controlled plate.

8. such as the described in any item electric heaters of claim 1-7, which is characterized in that the electric heater includes import and goes out Mouthful, the import, the outlet are located at the same side of the electric heater, and the import, the outlet are located at institute with light current portion State the same side of electric heater.

9. such as the described in any item electric heaters of claim 1-8, which is characterized in that the electric heater include first shell, Second shell, enclosure body and projective structure, it is the mounting wall, described with combining harmoniously as the component part of the enclosure body, The projective structure be at least partially disposed at the first shell and enclosure body, the second shell and the enclosure body it Between, the projective structure includes projective structure fixed part and projective structure free end, the projective structure fixed part and the shell Body ontology, and/or the fixed setting of the first shell, and/or the second shell.

10. such as the described in any item electric heaters of claim 1-9, which is characterized in that the electric heater includes first shell And second shell, the electric heater include air hole, the air hole is located at the first shell, and the air hole penetrates institute First shell is stated, the air hole is not connected to the fluid cavity；Or the air hole is located at the second shell, it is described Stomata penetrates the second shell, and the air hole is not connected to the fluid cavity；Or the air hole is located at the shell Ontology, the air hole penetrate the enclosure body, and the air hole is not connected to the fluid cavity.