CN101713565A - Electric heater and manufacture method thereof - Google Patents
Electric heater and manufacture method thereof Download PDFInfo
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- CN101713565A CN101713565A CN200910087293A CN200910087293A CN101713565A CN 101713565 A CN101713565 A CN 101713565A CN 200910087293 A CN200910087293 A CN 200910087293A CN 200910087293 A CN200910087293 A CN 200910087293A CN 101713565 A CN101713565 A CN 101713565A
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Abstract
The embodiment of the invention provides an electric heater and a manufacturing method thereof. The electric heater comprises heating rods, radiating fins and connecting pipes. Connecting openings are arranged on the radiating fins. Both ends of the connecting pipes are respectively welded with the outsides of the connecting openings of the adjacent radiating fins to connect the adjacent radiating fins. Two cover sheets are mutually buckled, welded and connected into a blade type radiating fin; after grooves on the two cover sheets are buckled, a heat conducting cavity is formed; the connecting openings of the adjacent radiating fins are butted by the connecting pipe, the outside of the seam of the connecting pipes and the connecting openings is welded, and the adjacent radiating fins are connected; ceramic baking treatment is performed on the surfaces of the radiating fins and/or the connecting pipes to form a ceramic baking layer; a sleeve penetrates through the continuous connecting pipes, the sleeve and the radiating fins are mutually welded on the penetration end openings, the gap among the outer wall of the sleeve, the radiating fins and the connecting pipes is hermetically communicated with a heat conducting cavity, and the heating rods are inserted into the sleeves. As the connecting pipes are welded and connected with the connecting openings of the radiating fins, the sealing performance required by the electric heater is ensured, and the heat radiating efficiency of the electric heater is enhanced.
Description
Technical field
The embodiment of the invention relates to the electric heating technology, particularly a kind of electric heater and manufacture method thereof.
Background technology
The electric heater that is used to heat in the prior art has multiple, and for example, a kind of mainly is to utilize heaters such as electrothermal tube or heating film, and Yi Shui and oil carry out heating for heat transfer carrier; Can also utilize the superconducting technology to make vacuum superconducting electric heater.Above-mentioned two types electric heater all has certain requirement to sealing, and the requirement of vacuum superconducting electric heater sealing is more outstanding, and sealing property has influenced the warm performance of system and the service life of electric heater.
Fig. 1 is the syndeton schematic diagram of electric heater interface in the prior art.As shown in Figure 1, electric heater generally is made of fin 101 and heating rod 103.The normally castiron cylindric body of fin 101, the both sides of each fin 101 are provided with interface 102 by the screwed connection mode, the flange 106 that is installed on the heating rod 103 is connected with fin 101 bottom interfaces 102 in the screw thread mode, thereby heating rod 103 is installed in fin 101 cavitys; After fin 101 outsides are with 102 extruding of the interface on the adjacent fin 101, closely cooperate to form and connect slit 104, and again formation weld seam 105 is welded in the internal connection of adjacent fin 101 interfaces 102 after the extruding, promptly in connection procedure, welding gun is passed the cavity of fin 101, weld the interface 102 on the adjacent fin 101 in the internal connection of fin 101 interfaces 102.Existing this electric heater of two types closely cooperates after earlier with 102 extruding of the interface on the adjacent fin 101 in that fin 101 is outside, and then the connecting portion of interface 102 that will adjacent two fin 101 adopts the connection of interior welds form.
But there is certain defective in existing electric heater: because the fin interface connects, be that welding gun is inserted in the fin cavity, adopt interior welds, the space of operation is narrow and small, the carrying out of inconvenient welding operation, and cause the decline of welding quality, make to have the space in the weld seam, do not reach the requirement of electric heater, occur the phenomenon of leakage of oil, gas leakage easily the sealing of fin; And need carry out the external compression processing to electric heater in advance and increase treatment process steps, processing cost is increased; And the distance between the adjacent fin is very little, is unfavorable for flowing in the passage that cold air forms between adjacent fin, makes the efficiency of heating surface of electric heater low.
Summary of the invention
The embodiment of the invention provides a kind of electric heater and manufacture method thereof, improving the sealing of electric heater, and improves radiating efficiency.
The embodiment of the invention provides a kind of electric heater, comprises heating rod and fin, on the described fin interface is set, and also comprises:
Tube connector, the two ends of described tube connector are welded to connect with the interface outside of adjacent two described fin respectively, thereby connect adjacent fin.
The embodiment of the invention also provides a kind of manufacture method of electric heater, comprising:
Two cover plates are fastened mutually and are welded to connect forming the vane type fin, and the groove on two described cover plates forms thermal conductive cavity behind fastening;
The interface of adjacent fin is docked by tube connector, and weld, thereby connect adjacent fin in the seam outside of tube connector and interface;
Carry out porcelain on the surface of fin and/or tube connector and handle, form porcelain layer;
Among each continuous described tube connector, wear sleeve pipe, sleeve pipe and fin are welded to each other in the port that wears, gap between the outer wall of described sleeve pipe and described fin and the described tube connector is communicated with described thermal conductive cavity sealing, and heating rod is inserted among the described sleeve pipe.
By above technical scheme as can be known, a kind of electric heater and manufacture method thereof that the embodiment of the invention provides, connect each interface by tube connector, the restriction that has caused because of narrow gaps Butt welding gun between the fin when having avoided welding, so that welding gun can enter the interval between the fin, from the interface outside junction of tube connector and interface is welded, and the processing that need not push, treatment process reduced.Therefore, solved the bad problem of fin sealing property, avoided the fin junction phenomenon of leakage of oil, gas leakage to occur, guaranteed the requirement of electric heater, and reduced production cost sealing.Simultaneously, owing to be welded with tube connector between the fin, the distance between the fin is strengthened, it is big that the air channel that forms between the fin also becomes thereupon, and the radiating surface between the adjacent fin is distribute heat fully, and the radiating efficiency of electric heater is improved.
Description of drawings
Fig. 1 is the syndeton schematic diagram of electric heater interface in the prior art;
The front view of the electric heater that Fig. 2 provides for the embodiment of the invention one;
The front view of the electric heater that Fig. 3 provides for the embodiment of the invention two;
The structural representation of fin in the electric heater that Fig. 4 provides for the embodiment of the invention two;
Fig. 5 is that A-A among Fig. 4 is to cutaway view;
The vertical view of the electric heater that Fig. 6 provides for the embodiment of the invention two;
The front view of the electric heater that Fig. 7 provides for the embodiment of the invention three;
The front view of the electric heater that Fig. 8 provides for the embodiment of the invention four;
The right view of outward appearance decoration panel in the electric heater that Fig. 9 provides for the embodiment of the invention four;
The flow chart of the manufacture method of the electric heater that Figure 10 provides for the embodiment of the invention five.
The specific embodiment
Also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment one
The front view of the electric heater that Fig. 2 provides for the embodiment of the invention one.As shown in Figure 2, the embodiment of the invention provides a kind of electric heater, comprises heating rod 3 and fin 1, is generally multi-disc fin 1 and connects into an electric heater, is respectively arranged with interface 2 on each fin 1.This electric heater also comprises tube connector 4, and the two ends of this tube connector 4 are welded to connect with interface 2 outsides of adjacent two fin 1 respectively, thereby connect adjacent fin 1.
In actual applications, vacuum superconducting electric heater is more more outstanding to the requirement of sealing than common electric heater, electric heater in the present embodiment can be specially vacuum superconducting electric heater, its design feature is: fin 1 generally can be provided with interface 2 respectively at the upper-lower position of both sides, for example, interface 2 can be set to a boss with through hole, this through hole is communicated with the thermal conductive cavity 5 among each fin 1, fin 1 is gone up the interface 2 that is provided with it can be the integrated punching moulding, the fin of representing as regional A among Fig. 21 and the connected mode of interface 2; Perhaps interface 2 is welded on the fin 1 and forms weld seam 1b, and the thermal conductive cavity 5 of through hole on the interface 2 and fin 1 is interconnected, the connected mode of representing as area B among Fig. 2.Two kinds of connected modes of above-mentioned interface 2 and fin 1 can be in conjunction with employing, but the connected mode of interface 2 and fin 1 preferably adopts consistent connected mode in concrete the application.The two ends of tube connector 4 are welded to connect with the outside of adjacent fin 1 interface 2 respectively, are connected by the thermal conductive cavity 5 of tube connector 4 with each fin 1, and tube connector 4 preferred length scopes are 2 centimetres of (cm)～2.5cm.Heating rod 3 passes each tube connector 4 of fin 1 bottom connecting interface 2, the interface 2 that is installed in flange 14 and fin 1 bottom on the heating rod 3 is tightly connected in the screw thread mode, make heating rod 3 sealing be installed in fin 1 bottom and be communicated with thermal conductive cavity 5, flange 14 outsides are reserved with the joint 31 of heating rod 3, are used to connect lead.In the thermal conductive cavity 5 of fin 1, add superconducting fluid and fin 1 is carried out application of vacuum.
In the course of the work, after the joint 31 of heating rod 3 connects the power supply energising, heating rod 3 produces thermal energy conduction to the superconducting fluid in fin 1 thermal conductive cavity 5, and superconducting fluid is heated and is undergone phase transition to uniform temperature, circulates the conduction heat in the thermal conductive cavity 5 of the superconducting fluid after the phase transformation in fin 1.
The electric heater that the embodiment of the invention one provides, by tube connector is set, make the spacing between adjacent two fin become big, make welding gun can the two ends of tube connector be welded to connect the interface of fin in the outside of interface, the weld seam that has guaranteed welding does not have the space, improved the quality of weld seam, guaranteed the sealing of electric heater fin junction, guaranteed that the phenomenon of leakage of oil, gas leakage can not take place in use to occur electric heater.The against vacuum superconducting electric heater can reach vacuum superconducting electric heater to vacuum requirements, improves heating properties, increases the service life.And existing electric heater is little owing to spacing between the fin, is difficult for welding operation in the interface outside, can only connect in electric heater interface interior welds, and poor welding quality causes sealing property to descend.Simultaneously, owing to be welded with tube connector between the interface on the fin, the distance between the fin is strengthened, it is big that the air channel that forms between the fin also becomes thereupon, and the radiating surface between the adjacent fin is distribute heat fully, has improved the radiating efficiency of electric heater.
On the basis of technique scheme, the preferred porcelain that adopts in the surface of fin 1 and/or tube connector 4 is handled, and promptly also comprises porcelain layer on the surface of fin 1 and/or tube connector 4.Be specially, the surface that utilizes porcelain to handle fin 1 and tube connector 4 processes processing, makes the surface of fin 1 and tube connector 4 evenly be coated with one deck ceramic material.
By fin and tube connector surface are carried out the porcelain processing, by castiron fin and tube connector, can increase its superficial density with respect to usually, strengthen air-tightness, also strengthened the structural strength of electric heater outside simultaneously.Because the surface of fin and tube connector evenly is coated with one deck ceramic material, more effectively prevents the generation of leakage of oil, gas leak phenomenon, the sealing property of entire equipment is promoted.Simultaneously, ceramic material has the function of insulation, and the temperature retention time of electric heater is increased, and heat-insulating property strengthens.And after the porcelain processing, the outward appearance of electric heater is more attractive in appearance.
Embodiment two
The structural representation of fin in the electric heater that the front view of the electric heater that Fig. 3 provides for the embodiment of the invention two, Fig. 4 provide for the embodiment of the invention two, Fig. 5 be A-A among Fig. 4 to cutaway view, the vertical view of the electric heater that Fig. 6 provides for the embodiment of the invention two.Shown in Fig. 3,4,5,6, present embodiment can be based on the foregoing description one, its difference is: fin 1 is the vane type fin, each fin 1 comprise mutual fastening and 6, two cover plates 6 of two cover plates of being welded to connect on groove 7 behind fastening, form thermal conductive cavity 5.
Be specially, each vane type fin 1 includes two cover plates 6, all is formed with groove 7 on each cover plate 6, as shown in Figure 5, be tightly connected after two cover plates 6 fasten mutually and by the mode of welding, the groove 7 on corresponding two cover plates 6 fastens the back and forms thermal conductive cavity 5.
On the basis of technique scheme, on the cover plate 6 many grooves 7 can be set, two cover plates 6 fasten and are welded to connect the back and form many thermal conductive cavities 5, preferably be welded to each other, many thermal conductive cavities 5 in each cover plate 6 are interconnected by the gap between two cover plates 6 at the edge of two cover plates 6.Cover plate 6 structural strengths that are provided with multiple tracks groove 7 are better, and when undergoing phase transition process in thermal conductive cavity 5, cover plate 6 is not easy to expand and damages.The thermal conductive cavity 5 of each groove 7 correspondences is to be connected by the gap between the cover plate 6, thereby can obtain heat loss through conduction effect preferably.
The electric heater that the embodiment of the invention two provides, by using the vane type fin, make between the adjacent fin over against area of dissipation enlarge markedly, cold air is when the gap of passing between the vane type fin, the heating surface (area) (HS of cold air contact is bigger, the heated time is longer, and therefore, the efficiency of heating surface significantly improves.With respect to existing vacuum superconducting electric heater, the embodiment of the invention two has improved the efficiency of heating surface, and radiating effect is better.And for the vane type fin that existing employing heating wet goods is realized heating, the oily line that adds deep fat owing to set holding in the existing fin is isolated from each other, cause the fin cavity very little, radiating effect is very poor, and the heat sink conducts heat chamber in the embodiment of the invention two is interconnected by the gap between two cover plates, it is big that the cavity of the thermal conductive cavity of entire heat dissipation sheet becomes, superconducting fluid or heat conduction wet goods heat transfer carrier can circulate in thermal conductive cavity, strengthen the flowability of heat transfer carrier, improved heat dispersion.
Embodiment three
The front view of the electric heater that Fig. 7 provides for the embodiment of the invention three.As shown in Figure 7, present embodiment can be based on the foregoing description one or embodiment two, and its difference is: electric heater also is provided with sleeve pipe 8, and sleeve pipe 8 is located among each continuous tube connector 4, especially be located in each tube connector 4 of fin 1 bottom, heating rod 3 is inserted among the sleeve pipe 8; Gap between the outer wall of sleeve pipe 8 and fin 1 and the tube connector 4 is communicated with thermal conductive cavity 5 sealings.
The technical scheme of present embodiment is by being provided with sleeve pipe 8 and heating rod 3 being inserted in the sleeve pipe 8, and the flange 14 that is installed on the heating rod 3 is tightly connected in the screw thread mode with fin 1 interface 2.Gap between the outer wall of sleeve pipe 8 and fin 1 and the tube connector 4 is communicated with thermal conductive cavity 5 sealings, and sleeve pipe 8 is heating rod 3 and thermal conductive cavity 5 isolation, can realize separating fully of heating rod 3 and thermal conductive cavity 5.For example, in the use of vacuum superconducting electric heater, the use of heating rod 3 has certain life-span, and its life-span is often short than common electrical warmer, needs to change heating rod 3 in use for some time.Owing to heating rod 3 is separated setting with thermal conductive cavity 5, makes the operation of changing heating rod 3 simpler.And, when changing heating rod 3, do not need fin 1 is done application of vacuum again, strengthened the practicality of vacuum superconducting electric heater.Simultaneously, gap between the outer wall of sleeve pipe 8 and fin 1 and the tube connector 4 is communicated with thermal conductive cavity 5 sealings, superconducting fluid in the vacuum superconducting electric heater is not directly contacted with heating rod 3, avoided superconducting fluid to leak by the flange on the heating rod 3 14, the more effective generation that prevents leakage of oil, gas leak phenomenon has strengthened the vacuum of vacuum superconducting electric heater.
Further, the copper sleeve pipe of the employing of sleeve pipe 8, sleeve pipe 8 adopt to be welded to connect with fin 1 junction and form weld seam 81.The heat transfer property of copper sleeve pipe 8 is strong, and the thermal energy transfer that can effectively heating rod 3 be produced is given the superconducting fluid in the fin 1, improves the efficiency of heating surface to superconducting fluid.Adopt the mode of welding that sleeve pipe 8 and fin 1 junction are handled, can effectively prevent the phenomenon that sleeve pipe 8 and fin 1 junction leak air, improved the sealing property of vacuum superconducting electric heater.In addition, can also be in sleeve pipe 8 filling heat-conductive oil, heating rod 3 is covered by conduction oil.By filling heat-conductive oil can be more effective the heat that produces of conduction heating rod 3, and can prevent heating rod 3 dry combustion methods, prolonged the service life of heating rod 3.
Embodiment four
The right view of outward appearance decoration panel in the electric heater that the front view of the electric heater that Fig. 8 provides for the embodiment of the invention four, Fig. 9 provide for the embodiment of the invention four.Shown in Fig. 8,9, electric heater is at the arranged outside decorative appearance panel 9 of fin 1, and decorative appearance panel 9 comprises liquid crystal panel 12, switch 11 and louvre 10.In use, by power interface 13 connect electricity warm after, press switch 11 after, liquid crystal panel 12 will show the duty of electric heater.Can make things convenient for the operation of user to electric heater by decorative appearance panel 9 is set, the louvre 10 on the decorative appearance panel 9 can distribute the heat that is sent by the fin 1 of decorative appearance panel 9 coverings.
Embodiment five
The flow chart of the manufacture method of the electric heater that Figure 10 provides for the embodiment of the invention five, this method can be used for making the electric heater of the arbitrary embodiment of the present invention, and this method specifically comprises the steps:
Step 100, two cover plates are fastened mutually and are welded to connect forming the vane type fin, the groove on two described cover plates forms thermal conductive cavity behind fastening.The cover plate that has groove can be by technological formings such as punching press or castings, and the welding of two cover plates is preferably welded the edge of cover plate and realized connecting and sealing.
Step 200, the interface of adjacent fin is docked by tube connector, and weld, thereby connect adjacent fin in the seam outside of tube connector and interface.
Step 300, carry out porcelain on the surface of fin and/or tube connector and handle, form porcelain layer.
Step 400, wear sleeve pipe among each continuous tube connector, sleeve pipe and fin are welded to each other in the junction, the outer wall of sleeve pipe is communicated with the thermal conductive cavity sealing with gap between fin and the tube connector, and heating rod is inserted among the sleeve pipe.
In the technique scheme, the interface of fin can be one-body molded or the boss that has through hole that is welded to connect with cover plate, and through hole is communicated with thermal conductive cavity.The interface that connects adjacent fin with tube connector makes the spacing between the fin increase, be beneficial to and use the outside weldings instrument to weld from outside abutment joint, thereby improved the sealing and the bonding strength of fin, thereby can suitably improve the vacuum of vacuum superconducting electric heater inside.Increase the face seal performance that porcelain layer can improve fin, help improving the vacuum of thermal conductive cavity, realize better radiating effect.Concrete structure and the position while welding that forms of sleeve pipe and fin can be described referring to previous embodiment, the technical scheme that sleeve pipe is set is convenient to the dismounting and change to heating rod, need not the thermal conductive cavity that seal be impacted, also needn't repeated multiple times vacuumize processing.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. an electric heater comprises heating rod and fin, on the described fin interface is set, and it is characterized in that, also comprises:
Tube connector, the two ends of described tube connector are welded to connect with the interface outside of adjacent two described fin respectively, thereby connect adjacent fin.
2. electric heater according to claim 1 is characterized in that: described interface is one to have the boss of through hole, and described through hole is communicated with the thermal conductive cavity among each described fin; Described fin and the interface that is provided with on it are the integrated punching moulding, and perhaps described joint weld is on described fin.
3. electric heater according to claim 1 is characterized in that: described fin is the vane type fin, and each described vane type fin comprises mutual fastening and two cover plates that are welded to connect, and the groove on two cover plates forms described thermal conductive cavity behind fastening.
4. electric heater according to claim 1 is characterized in that: the surface of described fin and/or described tube connector comprises porcelain layer.
5. according to the arbitrary described electric heater of claim 1～4, it is characterized in that, also comprise:
Sleeve pipe, described sleeve pipe are located among each continuous described tube connector, and described heating rod is inserted among the described sleeve pipe; Gap between the outer wall of described sleeve pipe and described fin and the described tube connector is communicated with the thermal conductive cavity sealing.
6. electric heater according to claim 5 is characterized in that: described sleeve pipe is copper sleeve pipe, and the junction of described sleeve pipe and described fin is for being welded to connect; In the described sleeve pipe conduction oil is set.
7. according to the arbitrary described electric heater of claim 1～4, it is characterized in that: described connection pipe range is 2 centimetres～2.5 centimetres.
8. electric heater according to claim 3 is characterized in that: be respectively arranged with the multiple tracks groove on the described cover plate, described cover plate fastens on the described fin in back and is formed with a plurality of described thermal conductive cavities; The edge of two described cover plates is welded to each other, and a plurality of described thermal conductive cavity on each fin is interconnected by the gap between two described cover plates.
9. according to the arbitrary described electric heater of claim 1～4, it is characterized in that, also comprise: the decorative appearance panel be arranged on the outside of described fin, and described decorative appearance panel comprises liquid crystal panel, switch and louvre.
10. the manufacture method of an electric heater is characterized in that, comprising:
Two cover plates are fastened mutually and are welded to connect forming the vane type fin, and the groove on two described cover plates forms thermal conductive cavity behind fastening;
The interface of adjacent fin is docked by tube connector, and weld, thereby connect adjacent fin in the seam outside of tube connector and interface;
Carry out porcelain on the surface of fin and/or tube connector and handle, form porcelain layer;
Among each continuous described tube connector, wear sleeve pipe, sleeve pipe and fin are welded to each other in the port that wears, gap between the outer wall of described sleeve pipe and described fin and the described tube connector is communicated with described thermal conductive cavity sealing, and heating rod is inserted among the described sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910087293A CN101713565A (en) | 2009-06-15 | 2009-06-15 | Electric heater and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910087293A CN101713565A (en) | 2009-06-15 | 2009-06-15 | Electric heater and manufacture method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101713565A true CN101713565A (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910087293A Pending CN101713565A (en) | 2009-06-15 | 2009-06-15 | Electric heater and manufacture method thereof |
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| CN (1) | CN101713565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276660A (en) * | 2015-11-30 | 2016-01-27 | 广东美的环境电器制造有限公司 | Cooling fin and heater with same |
-
2009
- 2009-06-15 CN CN200910087293A patent/CN101713565A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276660A (en) * | 2015-11-30 | 2016-01-27 | 广东美的环境电器制造有限公司 | Cooling fin and heater with same |
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Open date: 20100526 |