CN101691972B - Main body member for heat exchanger or electric heater - Google Patents
Main body member for heat exchanger or electric heater Download PDFInfo
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- CN101691972B CN101691972B CN2009102072342A CN200910207234A CN101691972B CN 101691972 B CN101691972 B CN 101691972B CN 2009102072342 A CN2009102072342 A CN 2009102072342A CN 200910207234 A CN200910207234 A CN 200910207234A CN 101691972 B CN101691972 B CN 101691972B
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Abstract
The invention discloses a main body member for a heat exchanger or an electric heater, which comprises a plastic straight pipe, a plastic tee pipe and a plastic cross pipe which are combined by gluing or hot melting to form a non-detachable bow shaped planar array. The member can be assembled with other parts to conveniently form a double-pipe heat exchanger, the electric heater or a combination of the two. The main body member has the advantages of convenient arrangement and disassembly, flexible fitting, low cost and energy conservation.
Description
Technical field
The present invention relates to a kind of main component that can realize the equipment of heat exchange and heating function simultaneously; Furtherly; The present invention is a kind of main component that is similar to the equipment of double pipe heat exchanger; Can be assembled into double pipe heat exchanger or electric heater flexibly, or the mixing apparatus of electrical heating and heat exchange.
Background technology
The present invention is relevant with double pipe heat exchanger and electric heating equipment.
Double pipe heat exchanger is a kind of common heat exchanger; Its essential structure is the pipe of two different-diameters; (being commonly referred to as outer tube) that diameter is big is enclosed within little (the being commonly referred to as interior pipe) outside of diameter; Two kinds of temperature different fluids (being commonly referred to as cold fluid and hot fluid) are reverse flow in the crack of interior pipe the inside and inner and outer pipes respectively, carries out the exchange of heat through the tube wall of interior pipe.
Common double pipe heat exchanger is main with metal sleeve at present, and promptly interior pipe and outer tube are metal tube, like copper tube, stainless steel tube, titanium pipe etc.The shape of heat exchanger is according to the difference of sleeve pipe, has a variety ofly, wherein is that the spiral plate-like that is mostly of sleeve pipe is main with the copper tube, and this is because copper tube is softer, is processed into the spirality plate-like easily.With stainless steel tube, titanium pipe is the heat exchanger of sleeve pipe, generally all is to adopt straight tube to add U-bend to combine through modes such as flange or welding.Why adopting metal tube commonplace, mainly is that metal tube is convenient to welding, and inner and outer pipes is isolated easily, and bearing capacity is also bigger simultaneously.
But, adopting the all-metal sleeve pipe, the metal of consumption is many, and the quality of complete equipment is also bigger, and manufacturing, installation and cost of transportation are all than higher.Simultaneously, because metallic sheath tubular type heat exchanger adopts welding to connect more, detachability is very poor, and therefore, the pipeline the inside is not easy to clean.Impure when the fluid of heat exchange, perhaps be prone to produce dirt, the pipeline blocking problem takes place easily.Simultaneously, owing to all adopt metallic conduit, when outer tube was not done the insulation processing, heat externally scattered and disappeared through outer tube easily, if increase the insulation measure of outer tube, can increase some costs again, and simultaneously, maintaining is also complicated more.
Electrical heating has obtained in the heating field to use widely now.This is because electrical heating adopts is the energy of electric this cleaning, the equipment simplicity of design, and easy for installation, power is controlled well, and security also can be guaranteed.Core apparatus in the electric heating equipment modal a kind of be electrical bar.The basic structure of electrical bar is in the slit, to be full of the insulating heat-conductive powder after metal tube is put heating wire, and the lead of heating wire is drawn, and carries out processing after the encapsulation process.Metal tube generally adopts stainless steel or copper, and it is bar-shaped to be processed into straight tube, also can be processed into curve-like, can draw lead in two, also can single-endedly draw lead.Wire terminals can only adopt material such as heat-proof silica gel to carry out sealed insulation and handle, and also can increase nipple or flange, the convenient connection.
No matter be double pipe heat exchanger or electrical bar; Its actual effect all is to make a kind of fluid reach the effect of intensification; Only double pipe heat exchanger is the temperature that promotes cold fluid with a kind of hot fluid through the mode of heat exchange; Electrical bar then is through converting electric energy to heat energy and the tube wall through electrical bar conducts to cold fluid, reaching the effect of intensification.And pipe generally all is cylindrical in electrical bar and the double pipe heat exchanger, therefore can it be carried out Unified Treatment through certain mode.
In addition, why popular present metallic sheath tubular type heat exchanger is, mainly is because they are used for application scenarios such as high temperature, high pressure, high corrosion more.And in fact; Some industrial and civilian occasions; Like the waste water recuperation of heat in shower place, the recuperation of heat of industrial wastewater etc., the fluid that needs heat exchange to handle is that low pressure (being no more than 1.2MPa), low temperature (in 5～90 ℃), low burn into exist certain impurity, also lacks this double pipe heat exchanger that adapts to fully with it at present; Especially the equipment that this heat exchange and electrical heating combine, the present invention proposes to this type of application just.
Summary of the invention
To a kind of occasion, promptly need heat a kind of fluid (for example running water, to call cold fluid in the following text); Have a kind of fluid (for example discarded heated waste water is to call hot fluid in the following text) that supplies heat exchange simultaneously, the pressure of two kinds of fluids is (as being no more than 1.2MPa) all within the specific limits; And target temperature and Current Temperatures be (in 5～90 ℃) all within the specific limits, utilize hot fluid at first cold fluid to be heated through heat exchanger, as do not reach effect; Combine electrical heating to heat up again, the purpose of this invention is to provide a kind of main component of this equipment, make it to be configured to double pipe heat exchanger easily; Perhaps electric heater; Perhaps both combinations, and, this main component have cost low, light, easy for installation, be easy to characteristics such as cleaning.
For realizing above-mentioned purpose, technical scheme of the present invention is following:
A kind of main component that is used for heat exchanger and electric heater, by plastic straighttube, plastic three-way pipe fitting and plastics four-way pipe fitting through combining.Straight tube, four-way form a bow font planar array through repeatedly repeated combination, and finish with threeway or four-way at two ends, and straight tube, threeway and four-way are connected through gluing or hot melting way, form a non-removable overall structure.Threeway has one leads directly to, and the centre is drawn a side and led to, and one of them straight-through port is a plastic port, is connected with plastic straighttube, and another straight-through port contains tapped metal insert.Four-way has two parallel leading directly to, and middle leading to through a side connects, and logical with side is the boundary, and two straight-through ports of a side are plastic port, be connected with plastic straighttube, and two straight-through ports of opposite side all contain tapped metal insert.There is an internal diameter bottom of threeway, four-way containing insert straight-through port than the little circular hole of inserts internal thread path, and this circular hole is made up of separately the circular hole of metal insert bottom, perhaps is made up of jointly metal insert and plastics.Four-way is integrated, or in advance by logical being spliced of the logical waney threeway offside of two sides, joining method adopts gluing or hot melting way.
Further specify in the face of the present technique scheme down:
This main component is formed by plastic straighttube and some plastic pipe appropriate combination, and plastic straighttube plays the effect of double pipe heat exchanger outer tube, and plastic pipe is used for plastic straighttube is spliced and as the inbound port that goes out of equipment.Two of sleeve pipe can be used as the gateway of two kinds of fluids with the plastic pipe of threeway form, and threeway has one leads directly to, and the centre is drawn a side and led to, and one of them straight-through port contains metal insert, and relative port does not contain metal insert.A kind of preferred form is to become T shape to this design of tee joint, leads to vertical the connection with side in the middle of promptly leading directly to.When the effect of single sleeve pipe is not enough, need to realize 180 degree revolution splicings of a plurality of sleeve pipes, can realize through a kind of plastic pipe of four-way form; This four-way has two parallel leading directly to, and middle leading to through a side connects, and is the boundary with the side pipe; Two straight-through ports of one side are plastic port; Be used for connecting plastic straighttube, and two straight-through ports of opposite side contain metal insert, be used to isolate interior pipe.A kind of preferred form is to be designed to H shape to this four-way, i.e. two parallel equal straight-through middle passing through logical vertical connection of a side.Straight tube and four-way form a bow font planar array through repeatedly repeated combination.Final two groups of ports of whole member can adopt threeway, also can use four-way as required, because they can realize the shunting of two kinds of fluids, but threeway is more succinct, and four-way is more flexible.Connect through modes such as gluing or hot melts between each part, form a non-removable overall structure.
Above-mentioned plastic straighttube can adopt plastic pipe commonly used, like PVC (polyvinyl chloride), PE (polyethylene) or PP-R (atactic copolymerized polypropene) water pipe etc.Metal insert in above-mentioned threeway, the four-way for feedwater pipe fitting industry inserts form commonly used, promptly adopts brass or stainless steel, tubulose, and openend has internal thread outwardly, and the opening of bottom is slightly little, less than the path of internal thread.The inserts outer wall has annular groove, and the thread form projection is arranged at the bottom, is used to make inserts and plastics to combine closely, and prevents to leak.The design of metal insert and production technology are very ripe.The mould of above-mentioned plastic T shape threeway, H shape four-way can realize all that in industry H shape four-way is complicated slightly, for reducing cost, also can be to be led to by the logical waney threeway offside of two sides in advance to be spliced, and joining method can adopt modes such as gluing or hot melt.
The application of the present invention once at double pipe heat exchanger and electric heater is described below, so that deepen to understanding of the present invention.Read for ease, follow-up said threeway, four-way are that the simplification of preferred plastic T shape threeway, plastic H shape four-way in the foregoing description is described.
This main component combines some other parts can be assembled into a double pipe heat exchanger easily.Pipe can adopt metal straight pipe in the heat exchanger, and like copper tube, it is big or small that external diameter is slightly less than in the main component inserts bottom circular aperture of threeway and four-way, and length is longer slightly than the distance of two inserts bottom circular aperture at sleeve portion two.For pipe in making can be isolated with outer tube, need lay rubber seal in the inserts bottom, the metal joint through band turret head in the middle of the double headed roller external screw thread of a hollow compresses rubber seal after screwing in inserts, realize the seal of inner and outer pipes.For pipe in making can play the effect of turning through 180 degree, the metal joint of four-way can be realized through U-shaped metal winding pipe (commonly used is the U-shaped copper pipe) the bound rubber sealing ring of a band enlarging port.Certainly, it is curved also can to adopt metal hose or the bellows of band female adapter to replace U-shaped.
Because the straight-through section outside of threeway and four-way all has internal thread interface, so can easily this main component be assembled into electric heater.If electrical bar is the straight pipe type electrical bar of simple single-ended lead-in wire, heat-proof silica gel sealing; External diameter is identical or smaller with the external diameter of pipe in the above-mentioned heat exchange; Can be inserted in the sleeve pipe, replace the position of pipe in the above-mentioned heat exchanger tube, length is consistent with length of tube in the above-mentioned heat exchange.Carry out seal through above-mentioned metal joint and rubber seal, prevent to be heated fluid and overflow.Like this, this equipment has just become the equipment of the electrical heating fluid of a multisection type.Certainly, if an electrical bar end itself has male connection, then install more convenient.The hickey in the straight-through section outside through threeway and four-way, even sensor that can the mounting strap hickey are like temperature sensor, pressure sensor etc.
Through said method, this main component can be assembled into double pipe heat exchanger, electric heater or both combinations.
Apply the present invention to double pipe heat exchanger and electric heater, compare existing technical scheme, have following good result:
1, through configuration metal inner pipe or electrical bar, can realize the function of double pipe heat exchanger; Also can realize the function of electric heater; Also can realize uniting two into one of two kinds of equipment, the parts such as sensor of all right mounting strap hickey have very strong flexibility.
2, the heat insulation effect of plastic outer tube outclass metal outer pipe, has only stainlessly 1/200 approximately like the thermal conductivity factor of PP-R pipe, so outer tube need be incubated processing hardly, so this main component is used for heat exchanger and electric heater all has energy-conservation effect.
3, because the very light weight of plastic pipe and pipe fitting, the quality of entire equipment alleviates a lot, has reduced manufacturing, installation and cost of transportation.
4, owing to reduced the use of metal pipe material, and the cost of plastic pipe is much lower, so the material cost of complete equipment reduces a lot.
5, because interior pipe can take apart,, can clean so no matter be interior pipe and outer tube, can prevent effectively that the situation that stopping up appears in heat exchanger from taking place.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 is a schematic perspective view of the present invention;
Fig. 2 is a top plan schematic view of the present invention;
Fig. 3 is threeway instance one generalized section;
Fig. 4 is threeway instance two generalized sections;
Fig. 5 is threeway instance three generalized sections;
The four-way section enlarged diagram that Fig. 6 is formed in one;
Fig. 7 is a combined type four-way section enlarged diagram;
Fig. 8 is the section enlarged diagram of details I;
Fig. 9 is the section enlarged diagram of details II;
Figure 10 is used for the schematic perspective view of mounting bush formula heat exchanger and electric heater for the present invention;
Figure 11 is the floor map of Figure 10;
Figure 12 is the section enlarged diagram of details III;
Figure 13 is the section enlarged diagram of details IV;
Figure 14 is the section enlarged diagram of details V.
Mark among the figure is following:
1, threeway, 2, four-way, 3, plastic outer tube, 4, metal insert, 5, metal inner pipe, 6, rubber seal, 7, metal joint, 8, rubber seal, 9, metal nuts, 10, the metal U-bend, 11, the electrical bar main body, 12, the electrical bar lead; A, the straight-through band of threeway inserts port, b, the straight-through plastic port of threeway, c, threeway side go side mouth, d, the straight-through band of four-way inserts port, e, the straight-through plastic port of four-way; I, II, III, IV, V, details area.
The specific embodiment
Fig. 1 is a schematic perspective view of the present invention, and Fig. 2 is a top plan schematic view of the present invention, and both can vivid explanation composition structure of the present invention.Except that two ends connected with threeway 1, other parts were the bow font array of plastic outer tube 3 and four-way 2 compositions.
Fig. 3 has explained a kind of form of threeway 1, and the port of straight-through section is a and b, and the port of the logical section of side is c, and port a contains tapped metal insert 4, and port b then is a plastic port, and port c is a plastic port.The port c of threeway 1 according to circumstances also can contain metal insert, and like Fig. 4, shown in Figure 5, wherein the inserts of the side go side mouth of Fig. 4 is an internal thread, and Fig. 5's then is external screw thread.The common ground of Fig. 3, Fig. 4, Fig. 5 is that straight-through port one end of threeway 1 contains tapped metal insert, and the other end does not contain metal insert, and the side general rule can comprise metal insert according to actual conditions.
Fig. 6 has explained a kind of form of four-way 2, and it is the boundary that four ports lead to side, and two kinds of d and e are arranged, and wherein the d port contains tapped metal insert 4, and the e port then is a plastic port.Four-way is not easy to the demoulding owing to exist a side logical, so for the ease of the demoulding, the logical section of side tube wall is designed to have certain gradient.Certainly, the die cost of the scheme of Fig. 6 is than higher, in order to reduce cost; Can four-way be changed by the logical waney threeway of two sides and realize; Promptly the mode of side of two threeways gluing excessively all (PVC etc.) or hot melt (PP-R, PE etc.) connects, and is assembled into a four-way in advance, and is as shown in Figure 7.
Fig. 8, Fig. 9 are the section enlarged diagrams of details I, II, and the connected mode of plastic outer tube 3 and threeway 1, four-way 2 is described.According to the difference of plastic material, can adopt the mode of gluing (PVC etc.) or hot melt (PP-R, PE etc.), this dual mode all is through actual verification and the connected mode that extensively adopts.
Above-mentioned embodiment all is practicable; Plastic outer tube 3 can adopt familiar PVC class on the market, PP-R class, PE class tubing; Threeway and four-way can adopt the material identical with plastic outer tube 3, and be injection molded through metal insert is placed in the mould, is very ripe manufacturing process.
Below in conjunction with description of drawings application of the present invention, deepen understanding to beneficial effect of the present invention.
Figure 10, Figure 11 have showed a kind of core of the equipment that heat exchanger and electric heater are made of one, and its main component is scheme of the present invention.This equipment can be used for the heat recovery of shower house waste water and the heating of bathing water; Its principle is running water at first to be carried out heat exchange through heat exchange unit handle; Heat transferred running water with shower waste; And then pass through electric heating unit and further heat, generate the suitable hot water of temperature for shower.The flow direction of filled arrows indication running water among the figure, the flow direction of hollow arrow indication shower waste, their reverse flow is to obtain best heat exchange effect.
Figure 12 is the section enlarged diagram of details III among Figure 11, explains that running water and shower waste are in the shunting and the isolation of outer tube and interior pipe in the heat exchange unit.Metal inner pipe 5 can adopt the high copper tube of heat-transfer capability.There is screw thread at metal joint 7 two, and there is a turret head centre, and the centre connects, and the internal diameter at two is a bit larger tham the external diameter of metal inner pipe 5 and metal U-bend 10 flared parts, and the internal diameter in stage casing is slightly little, forms a little step.After metal inner pipe 5 passes through the bottom circular aperture of metal insert of threeway; Rubber seal 6 is enclosed within on the metal inner pipe 5, and inserts the bottom of metal insert, then metal joint 7 is screwed in metal insert; Be enclosed within on the metal inner pipe 5; Compress rubber seal 6, it is all closely contacted with metal insert, metal inner pipe 5, metal joint 7, blocked the approach that running water leaks; So just can realize the isolation and the shunting of running water and shower waste, can realize that metal inner pipe 5 is connected with the sealing of metal joint 7 simultaneously.
Figure 13 is the section enlarged diagram of details IV among Figure 11, and running water and the equivalent method of turning of shower waste realization 180 degree in the heat exchange unit are described.Among the figure, running water is that the logical part of the side through four-way realizes that 180 degree equivalences turn, and shower waste then need be realized through metal U-bend 10 bound rubber sealing rings 8, turret head metal nuts 9.Metal U-bend 10 can be by the red copper straight tube through being bent into 180 degree, and the straight length at two ends forms the enlarging port through punching press and forms, and the centre-to-centre spacing at two ends equals the straight-through centre-to-centre spacing of four-way.Metal nuts 9 outsides are turret head, internal thread and metal joint 7 couplings, and a circular hole is arranged at the bottom, and internal diameter is a bit larger tham the external diameter of metal U-bend 10 flared parts.The internal diameter of rubber seal 8 peacetime states is slightly smaller than the straight tube external diameter of metal U-bend 10.During assembling; Earlier metal nuts 9 is inserted in the metal U-bend 10; Then rubber seal 8 is inserted in, the enlarging port with metal U-bend 10 inserts in the metal joint 7 metal nuts 9 of screwing then again; Rubber seal 8 is all closely contacted with metal U-bend 10 and metal nuts 9, realize the sealing of the passage of shower waste.
Figure 14 is the section enlarged diagram of details V among Figure 11, and the installation method of electrically heated rod in the electric heating unit is described.This electrical bar is simple single ended type electrical bar, and electrical bar main body external diameter equals or is slightly smaller than metal inner pipe 5, and lead end adopts the heat-proof silica gel sealing, and length is consistent with the length of the metal inner pipe 5 of heat exchange unit.During installation, earlier electrical bar is inserted threeway or four-way, pass through the bottom circular aperture of the corresponding metal insert in outer tube two; Electrical bar main body 11 is equivalent to frame on metal insert like this; Do not contact with plastic outer tube, when preventing accident, plastic outer tube is scalded fusing.Then rubber seal is enclosed within on the electrical bar main body 11, and inserts the bottom of metal insert, metal joint 7 screws in metal insert, compresses rubber seal, realizes the sealing at the place, slit of electrical bar and threeway, four-way.For leaded end, electrical bar lead 12 should pass the endoporus of metal joint 7 earlier, and then metal joint 7 is screwed in metal insert.For safety, the heating wire in the electrical bar main body 11 should only be arranged in interlude, and certain distance should be reserved in two, makes heating concentrate on interlude, and two ends do not generate heat near the part of metal insert, when preventing accident, fusing is scalded in threeway or four-way.
The method of once cleaning below is described.When needs clean inner and outer pipes, only need metal nuts 9, metal joint 7 be unscrewed successively, take off other part, metal inner pipe 5 is extracted out, just outer tube and interior pipe have cleaned respectively.
Above embodiment is only in order to technical scheme of the present invention to be described but not limit it; Still can basic principle according to the present invention technical scheme is made amendment or be equal to replacement, also can not make amended technical scheme break away from the spirit and the scope of technical scheme of the present invention and these are revised or be equal to replacement.
Claims (2)
1. main component that is used for heat exchanger and electric heater; By plastic straighttube, plastic three-way pipe fitting and plastics four-way pipe fitting through combining; It is characterized in that: straight tube, four-way form a bow font planar array through repeatedly repeated combination, and finish with threeway or four-way at two ends; Straight tube, threeway and four-way are connected through gluing or hot melting way, form a non-removable overall structure; Threeway has one leads directly to, and the centre is drawn a side and led to, and one of them straight-through port is a plastic port, is connected with plastic straighttube, and another straight-through port contains tapped metal insert; Four-way has two parallel leading directly to, and middle leading to through a side connects, and logical with side is the boundary, and two straight-through ports of a side are plastic port, be connected with plastic straighttube, and two straight-through ports of opposite side all contain tapped metal insert; There is an internal diameter bottom of threeway, four-way containing insert straight-through port than the little circular hole of inserts internal thread path, and this circular hole is made up of separately the circular hole of metal insert bottom, perhaps is made up of jointly metal insert and plastics.
2. a kind of main component that is used for heat exchanger and electric heater according to claim 1; It is characterized in that: the four-way of being addressed is integrated; Or in advance by logical being spliced of the logical waney threeway offside of two sides, joining method adopts gluing or hot melting way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102072342A CN101691972B (en) | 2009-10-14 | 2009-10-14 | Main body member for heat exchanger or electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102072342A CN101691972B (en) | 2009-10-14 | 2009-10-14 | Main body member for heat exchanger or electric heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101691972A CN101691972A (en) | 2010-04-07 |
| CN101691972B true CN101691972B (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102072342A Expired - Fee Related CN101691972B (en) | 2009-10-14 | 2009-10-14 | Main body member for heat exchanger or electric heater |
Country Status (1)
| Country | Link |
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| CN (1) | CN101691972B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011091732A1 (en) * | 2010-02-01 | 2011-08-04 | 上海醇华电子有限公司 | Double-pipe heat exchanger |
| CN101949660A (en) * | 2010-09-17 | 2011-01-19 | 北京华创瑞风空调科技有限公司 | Coaxial double-pipe heat exchanger with corrosion-resistant plastic outer pipe |
| CN103567951B (en) * | 2012-07-26 | 2015-06-24 | 上海梅山钢铁股份有限公司 | Replacement device for long tube type electric heater Inner core |
| CN103033075B (en) * | 2012-11-16 | 2015-03-25 | 枣庄福源印染机械有限公司 | Plastic radiating and ventilating water heater and making method thereof |
| CN104185319A (en) * | 2014-09-04 | 2014-12-03 | 刘占友 | Liquid heating rod capable of achieving eddy type thermal circulation |
| CN105180439B (en) * | 2015-08-31 | 2017-08-25 | 侯梦斌 | A kind of long tube type heat-processing equipment and technique |
| CN105240910B (en) * | 2015-10-19 | 2018-09-25 | 耿华龙 | 220 volts of electric ion heat energy machines of ladder |
| CN106247822B (en) * | 2016-09-27 | 2019-08-09 | 甘秀坚 | A kind of Anti-slip ground cushion of the recyclable shower waste heat of crawler type |
| CN106440880B (en) * | 2016-10-17 | 2019-03-08 | 四川捷元科技有限公司 | Unit-combination type heat exchanger matrix |
| CN109269327B (en) * | 2016-10-17 | 2020-12-01 | 四川捷元科技有限公司 | Heat exchange unit and heat exchange matrix |
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| CN2463648Y (en) * | 2001-02-22 | 2001-12-05 | 纪耀宗 | Sealing connecting piece for plastic pipeline |
| US6722422B1 (en) * | 2003-06-10 | 2004-04-20 | Feldmeier Equipment, Inc. | Heat exchange system with improved flow velocity adjustment mechanism |
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| CN201081577Y (en) * | 2007-01-06 | 2008-07-02 | 罗伟强 | Double-pipe exchanger |
| CN201697502U (en) * | 2009-10-14 | 2011-01-05 | 上海醇华电子有限公司 | Main body component for heat exchanger and electric heater |
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- 2009-10-14 CN CN2009102072342A patent/CN101691972B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2463648Y (en) * | 2001-02-22 | 2001-12-05 | 纪耀宗 | Sealing connecting piece for plastic pipeline |
| US6722422B1 (en) * | 2003-06-10 | 2004-04-20 | Feldmeier Equipment, Inc. | Heat exchange system with improved flow velocity adjustment mechanism |
| CN2643124Y (en) * | 2003-07-03 | 2004-09-22 | 韩富才 | Pipe fitting jointing pipe ferrule |
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| CN101691972A (en) | 2010-04-07 |
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