CN106196757A - Helical fin formula condenser - Google Patents
Helical fin formula condenser Download PDFInfo
- Publication number
- CN106196757A CN106196757A CN201610692759.XA CN201610692759A CN106196757A CN 106196757 A CN106196757 A CN 106196757A CN 201610692759 A CN201610692759 A CN 201610692759A CN 106196757 A CN106196757 A CN 106196757A
- Authority
- CN
- China
- Prior art keywords
- plane
- condenser
- fin
- condensing tube
- card
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
- F28F9/0131—Auxiliary supports for elements for tubes or tube-assemblies formed by plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/13—Vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/17—Size reduction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/30—Safety or protection arrangements; Arrangements for preventing malfunction for preventing vibrations
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to helical fin formula condenser, including condensing tube and fin, be wrapped on the surface of condensing tube described fin screw type, condensing tube through the most roundabout, be bent to form cube structure；Also include the fixed support being clamped on condensing tube.The features such as it is little that the present invention has volume, compact conformation, good refrigeration effect.
Description
Technical field
The present invention relates to condenser technology field, be specifically related to a kind of helical fin formula condenser.
Background technology
Existing condenser typically uses water condenser, longitudinal mixed tube bundle condenser, threaded pipe type condenser etc., existing cold
Condenser is more preferable in order to played by cooling effect, the most all has the feature that area of dissipation is big, this creates the terminal a defect,
Be exactly that volume is big, cause cost high, apply by the biggest limited；And once use the condenser that volume is little, will exist
The defect of heat dispersion difference.
The Chinese invention patent of Patent No. 200610111866.5 provides a kind of turn fin condenser, including spiral
Finned tube 15, horizontal fixed members 20 and upright mounts 30.Spiral fin coil 15 is bent to snakelike first, in order to pass through water
Flat fixture 20 is horizontally disposed and fixing, then carries out second order buckling on the snakelike longitudinal direction bent first, and passes through
Upright mounts 30 is arranged and fixing in vertical direction.Horizontal fixed members 20 includes that fixing device 28, fixing device 28 have half
Cylindrical part and extension 26, this semi cylindrical portion has the internal diameter equal with the external diameter of spiral fin coil 15, described in prolong
Extending portion divides 26 to extend in parallel in the both sides of semicylindrical portions.Although this invention solves the defect of prior art, but in structure
On but there is hidden danger.Its horizontal fixed members is to be clamped directly on helical fin, can cause fin seriously when being fixedly clamped
Damage, thus cause this condenser not fully up to expectations in terms of refrigeration.
Summary of the invention
For above-mentioned technical problem, the present invention provides a kind of helical fin formula condenser solving drawbacks described above.
Realize technical scheme as follows:
Helical fin formula condenser, including condensing tube and fin, is wrapped in the surface of condensing tube described fin screw type
On, condensing tube through the most roundabout, be bent to form cube structure；Also include being fitted on fin and being clamped to condensing tube
On fixed support.
Further, the inner side that described fin is connected with radiating tube is wave structure, and outside is smooth type structure.
Further, described fixed support includes installing plate and is connected to the clamp system of installing plate side, described folder
Tight mechanism is made up of multiple uniform clamping unit on a mounting board, is provided with gap between adjacent two clamping unit, and each
Clamping unit is made up of two cards, is provided with, between two cards, the draw-in groove adapted with condensing tube.
Further, described card trench bottom is provided with at least one adjustment tank, and this adjustment tank extends on installing plate.
Further, described clamp system is provided with one or two.
Further, described fixed support includes installing plate and is provided with multiple card, the card on both sides respectively in both sides
Sheet is crisscross arranged, and the both sides of this installing plate form T-shaped structure after twice bending, is formed and condensing tube between the card of both sides
The draw-in groove adapted.
Further, a described bending is 180 °, and secondary bending is 90 °.
Further, the plane at described card place is less than the plane at installing plate place.
Further, the inner side of the end of described card be provided with interior inclined-plane, outside is provided with outer inclined-plane, interior inclined-plane and outer tiltedly
For to face directly or the cambered surface of outwardly convex between face.
Further, the angle of inclination on described outer inclined-plane is more than the angle of inclination on interior inclined-plane.
Have employed such scheme, the condenser of the present invention is " returning " font cube structure, and the volume of structure is greatly reduced,
But compact firmly, reduce cost simultaneously；This inside configuration has enough airspaces and heat-dissipating space, it is ensured that condensing tube
Heat exchange effect, improves its refrigeration and refrigerating capacity；On the one hand fixed support can play fixing to condenser structure
Effect, it is ensured that the constant spacing between pipe, the condenser that prevents from being squeezed deforms, and on the other hand can be used to protective wing
Sheet, prevent from making when mounting and fixing bracket its periphery fin deformation or interlaced together, thus have influence on condenser
Refrigeration.
Fixed support in the present invention changes the mode being in the past clamped in fin, and it is clamped directly at the surface of condensing tube
On, thus reaching to fasten the effect of condensing tube, this form is reliable and stable, and does not act on fin and would not directly or indirectly hinder
Evil is to fin.It is understood that fin is the heat exchange area in order to increase condensing tube, thus improve its heat exchange efficiency.If fin deforms
Or be mutually wound around, the refrigeration of this condenser will be had a greatly reduced quality, and causes localized heat to exchange weak effect, and air-flow becomes disorderly,
Heat cannot disperse, and time serious, condenser cannot be carried out refrigeration work.The mode of the present invention, though condenser by external force quilt
Extruding, its active force only can on fixed support and condensing tube, and fixed support bear major part external force, the structure of such fin
Just being protected with shape, your pipe itself cold also will not deform, and the refrigeration of condenser is just guaranteed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the connection diagram of condensing tube and fin；
Fig. 3 is the connection diagram of fixed support and condenser；
Fig. 4 is support bracket fastened structural representation；
Fig. 5 is the first unfolding assumption diagram support bracket fastened；
Fig. 6 is fixed support the second unfolding assumption diagram；
Fig. 7 is support bracket fastened another kind of structural representation；
Fig. 8 is another structure expanded view of fixed support；
Fig. 9 is the structural representation that Fig. 8 makes；
Figure 10 is the left view of Fig. 9；
Figure 11 is the upward view of Fig. 8；
Figure 12 is the enlarged drawing of A in Fig. 4；
Detailed description of the invention
The present invention is further described with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1, such as Fig. 1 to Fig. 6, helical fin formula condenser, including condensing tube 1 and fin 2, described fin 2 spiral
Being wrapped on the surface of condensing tube 1, the inner side that fin 2 is connected with radiating tube 1 is wave structure 21 likes, and outside is smooth type
Structure 22, inner side uses wave structure to connect and is on the one hand connected firmly, and is difficult to slide, can disperse to come during assembling
From extraneous active force, it is hardly damaged, is on the other hand for heat being guided, thermal current is carried out water conservancy diversion, soon
Speed heat radiation；The smooth type structure in outside ensure that the heat dissipation direction that fin is formed when heat radiation is to dissipate uniform overall linear
Heat radiation, if continuing is wave structure, may result in fin and dispels the heat not linear divergence, and heat radiation radiation has intersection and weight
Folded, heat wave can influence each other when overlap, causes certain resistance, thus has influence on its refrigeration.
Condensing tube through the most roundabout, be bent to form cube structure, so volume of this condenser is just greatly reduced, and accounts for
Also diminish with space, but but can guarantee that good refrigeration, be with a wide range of applications.
Also including the fixed support 3 being fitted on fin 2 and be clamped on condensing tube 1, fixed support 3 includes installing
Plate 31 and be connected to the clamp system 32 of installing plate 31 side, clamp system 32 is vertical with installing plate 31 to be connected, folder here
Tight mechanism can have one (Fig. 6), it is possibility to have two (Fig. 5), when clamp system is provided with one, it is connected to installing plate
Any one side, and when clamp system is provided with two, then it is connected on two sides of installation symmetrically, clamp system
Setting can do corresponding adjustment according to the concrete structure of condenser and size, certainly, for the ease of making, is commonly installed plate and folder
Tight mechanism is integrated, and the later stage i.e. can be made into by equipment or artificial bending.
Clamp system 32 is made up of multiple clamping unit 321 being distributed on installing plate 31, adjacent two clamping unit it
Between be provided with gap 322, the spacing between gap length and condenser tube here is in the same size, and each clamping unit 321 by
Two cards 323 are constituted, and be provided with the draw-in groove 324 adapted with condensing tube, be arranged on condensation at fixed support between two cards
Time upper, draw-in groove is directed at condensing tube and be inserted into bottom, in general the length of card is relatively long, its length at least two cold
The external diameter sum of solidifying pipe, after condensing tube is stuck in draw-in groove, more laterally compress card with mould, will two card ends
Distance is shunk, and the most just can be blocked by condensing tube firmly.
Embodiment 2, such as Fig. 7, certainly, card is rigid structure, in order to prevent it from rupturing, and can successfully by
Card shrinks, and is provided with three adjustment tanks 325 bottom draw-in groove 324, and this adjustment tank extends on installing plate.
Embodiment 3, such as Fig. 8-Figure 11, fixed support 3 includes installing plate 31 and is provided with multiple card respectively in both sides
323, the card on both sides is crisscross arranged, and the both sides of this installing plate form T-shaped structure after twice bending, and in general first
Secondary at A bending be 180 °, second time bending B at is 90 °, and certain bending sequentially can also in turn, the card 323 of both sides
Between form the draw-in groove 324 that adapts with condensing tube, and the end of installing plate becomes limiting section, it is ensured that condensing tube is stuck in draw-in groove
In, the plane at card place is less than the plane at installing plate place, and so after bending and molding, all cards all can be at same plane
On, effectively condensing tube can be gripped, and installing plate can cover more fin, at mounting and fixing bracket or cold
Prevent fin from deforming during condenser.
Such as Figure 12, the inner side of the end of card 323 be provided with interior inclined-plane 3231, such card forms the end bore of draw-in groove
Become big, it is easier to alignment condensing tube, it is simple to condensing tube inserts in slot, prevent condensing tube from also not inserting slot, having made card
Sheet bending deforms, and affects it and uses；Outside is provided with outer inclined-plane 3232, so can remove the corner angle that card is sharp-pointed, because receiving
It is to use corresponding mould during tight card, and mould and operator can be caused damage by corner angle, so the setting of this outer inclined-plane
Put be to ensure that mould can life-time service, reduce cost, and protection operator safety；Interior inclined-plane and outer inclined-plane it
Between for face directly or the cambered surface 3233 of outwardly convex, its purpose is to prevent from being formed sharp-pointed corner angle, the angle of inclination on outer inclined-plane
More than the angle of inclination on interior inclined-plane, outer inclined-plane usually and horizontal angle α are 60 °, interior inclined-plane and horizontal angle β
It it is 45 °.
Certainly, it is connected in order to ensure that fixed support and condenser are fixing, can offer multiple solid on fixed support
Determine hole (unmarked in figure), can be fixed by being screwed into screw in fixing hole, simple in construction, facilitate demolition and maintenance.
The fixed support that the present invention uses also has the advantage that
A. fixed support is directly connected with condensing tube, can further increase heat-transfer surface as heat radiator medium
Long-pending, i.e. fixed support directly carries out heat exchange, and the more conventional mode of heat transfer effect is attained a yet higher goal.
B. simple in construction, easy to make, production cost is low, decreases the set-up time, improves work efficiency.
C. reduce condensing tube resonant frequency, thus reduce the vibration of condenser, prevent from causing itself and refrigerator because of vibration
Junction loosens, to such an extent as to causes unnecessary loss.
Claims (10)
1. helical fin formula condenser, it is characterised in that: include condensing tube and fin, be wrapped in condensation described fin screw type
On the surface of pipe, condensing tube through the most roundabout, be bent to form cube structure；Also include that be clamped on condensing tube consolidates
Fixed rack.
Turn fin condenser the most according to claim 1, it is characterised in that: the inner side that described fin is connected with radiating tube
For wave structure, outside is smooth type structure.
Turn fin condenser the most according to claim 1, it is characterised in that: described fixed support include installing plate and
Being connected to the clamp system of installing plate side, described clamp system is made up of multiple uniform clamping unit on a mounting board, phase
It is provided with gap between adjacent two clamping unit, and each clamping unit is made up of two cards, is provided with cold between two cards
The draw-in groove that solidifying pipe adapts.
Turn fin condenser the most according to claim 3, it is characterised in that: described card trench bottom is provided with at least one and adjusts
Whole groove, this adjustment tank extends on installing plate.
5. according to the turn fin condenser described in Claims 2 or 3, it is characterised in that: described clamp system is provided with one
Or two.
Turn fin condenser the most according to claim 1, it is characterised in that: described fixed support include installing plate and
Be provided with multiple card respectively in both sides, the card on both sides is crisscross arranged, and the both sides of this installing plate form T after twice bending
Shape structure, forms the draw-in groove adapted with condensing tube between the card of both sides.
Turn fin condenser the most according to claim 6, it is characterised in that: a described bending is 180 °, and secondary is rolled over
Curved is 90 °.
Turn fin condenser the most according to claim 6, it is characterised in that: the plane at described card place is less than installing
The plane at plate place.
9. according to the turn fin condenser described in claim 3 or 6, it is characterised in that: the inner side of the end of described card
Being provided with interior inclined-plane, outside is provided with outer inclined-plane, for face directly or the cambered surface of outwardly convex between interior inclined-plane and outer inclined-plane.
Turn fin condenser the most according to claim 9, it is characterised in that: the angle of inclination on described outer inclined-plane is more than
The angle of inclination on interior inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610692759.XA CN106196757A (en) | 2016-08-19 | 2016-08-19 | Helical fin formula condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610692759.XA CN106196757A (en) | 2016-08-19 | 2016-08-19 | Helical fin formula condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106196757A true CN106196757A (en) | 2016-12-07 |
Family
ID=57522134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610692759.XA Pending CN106196757A (en) | 2016-08-19 | 2016-08-19 | Helical fin formula condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106196757A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524603A (en) * | 2017-01-14 | 2017-03-22 | 合肥太通制冷科技有限公司 | Finned condenser |
| CN106871499A (en) * | 2017-02-23 | 2017-06-20 | 泉州泉港璟冠信息科技有限公司 | A kind of flexible structure and be easy to dismounting cleaning finned cooler |
| CN107144050A (en) * | 2017-06-19 | 2017-09-08 | 合肥太通制冷科技有限公司 | A kind of finned cooler |
| CN107192178A (en) * | 2017-06-20 | 2017-09-22 | 合肥太通制冷科技有限公司 | A kind of internal tooth aluminium tube condenser |
| WO2018032497A1 (en) * | 2016-08-19 | 2018-02-22 | 常州市常蒸热交换器科技有限公司 | Spiral finned condenser |
| CN108224831A (en) * | 2017-12-27 | 2018-06-29 | 安徽环球星新能源科技有限公司 | A kind of CO 2 trans-critical heat pump heat exchanger |
| CN108626918A (en) * | 2018-03-21 | 2018-10-09 | 合肥美菱有色金属制品有限公司 | A kind of rotation wing condenser and its installing mechanism |
| US20230152048A1 (en) * | 2021-11-18 | 2023-05-18 | Mahle International Gmbh | Folded coil individual tube spacers |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101223423B1 (en) * | 2012-07-04 | 2013-02-12 | 주식회사 하나 | Manufacturing method for turn-fin condenser |
| CN104315760A (en) * | 2014-09-28 | 2015-01-28 | 常州市常蒸热交换器科技有限公司 | Spiral condenser and manufacturing process of spiral condenser |
| CN204176970U (en) * | 2014-09-28 | 2015-02-25 | 常州市常蒸热交换器科技有限公司 | spiral condenser |
-
2016
- 2016-08-19 CN CN201610692759.XA patent/CN106196757A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101223423B1 (en) * | 2012-07-04 | 2013-02-12 | 주식회사 하나 | Manufacturing method for turn-fin condenser |
| CN104315760A (en) * | 2014-09-28 | 2015-01-28 | 常州市常蒸热交换器科技有限公司 | Spiral condenser and manufacturing process of spiral condenser |
| CN204176970U (en) * | 2014-09-28 | 2015-02-25 | 常州市常蒸热交换器科技有限公司 | spiral condenser |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032497A1 (en) * | 2016-08-19 | 2018-02-22 | 常州市常蒸热交换器科技有限公司 | Spiral finned condenser |
| US10746472B2 (en) | 2016-08-19 | 2020-08-18 | Changzhou Changzheng Hechanger Technology Co., Ltd. | Spiral finned condenser |
| CN106524603A (en) * | 2017-01-14 | 2017-03-22 | 合肥太通制冷科技有限公司 | Finned condenser |
| CN106871499A (en) * | 2017-02-23 | 2017-06-20 | 泉州泉港璟冠信息科技有限公司 | A kind of flexible structure and be easy to dismounting cleaning finned cooler |
| CN106871499B (en) * | 2017-02-23 | 2019-10-25 | 江苏利尔机车科技有限公司 | A kind of flexible structure and the finned cooler for being easy to dismount cleaning |
| CN107144050A (en) * | 2017-06-19 | 2017-09-08 | 合肥太通制冷科技有限公司 | A kind of finned cooler |
| CN107192178A (en) * | 2017-06-20 | 2017-09-22 | 合肥太通制冷科技有限公司 | A kind of internal tooth aluminium tube condenser |
| CN108224831A (en) * | 2017-12-27 | 2018-06-29 | 安徽环球星新能源科技有限公司 | A kind of CO 2 trans-critical heat pump heat exchanger |
| CN108224831B (en) * | 2017-12-27 | 2020-05-12 | 中能绿色精灵(北京)科技有限公司 | Transcritical carbon dioxide heat pump heat exchanger |
| CN108626918A (en) * | 2018-03-21 | 2018-10-09 | 合肥美菱有色金属制品有限公司 | A kind of rotation wing condenser and its installing mechanism |
| US20230152048A1 (en) * | 2021-11-18 | 2023-05-18 | Mahle International Gmbh | Folded coil individual tube spacers |
| US11988470B2 (en) * | 2021-11-18 | 2024-05-21 | Mahle International Gmbh | Folded coil individual tube spacers |
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Application publication date: 20161207 |
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