CN109152110B - PTC heating device and electric appliance comprising same - Google Patents
PTC heating device and electric appliance comprising same Download PDFInfo
- Publication number
- CN109152110B CN109152110B CN201810986586.1A CN201810986586A CN109152110B CN 109152110 B CN109152110 B CN 109152110B CN 201810986586 A CN201810986586 A CN 201810986586A CN 109152110 B CN109152110 B CN 109152110B
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- Prior art keywords
- heat
- heating device
- heater
- strip
- ptc
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- 210000001503 joint Anatomy 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000017525 heat dissipation Effects 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000002788 crimping Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
- H05B3/08—Heater elements structurally combined with coupling elements or holders having electric connections specially adapted for high temperatures
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/016—Heaters using particular connecting means
Landscapes
- Resistance Heating (AREA)
Abstract
The invention discloses a PTC heating device and an electric appliance containing the same, wherein the heating device comprises at least two rows of radiators and PTC heating sheets which are attached between heat conduction planes of the radiators to form a group. The heating device is provided with a leading-out surface, a connecting through hole is formed in the leading-out surface, a butt joint piece connected with a power supply lead is riveted on the through hole, and a power supply wire harness is crimped on the butt joint piece. By adopting the design of the invention, the connecting inserting sheet, the electric connecting inserting spring and the sheath can be omitted on the basis of the prior art. Compared with the prior art, the invention has the core advantages of simple structure, reduced material cost, reliable electric connection, safe use, remarkably improved production efficiency and the like, and achieves the invention effect of perfect combination of practicality, creativity and novelty.
Description
Technical Field
The utility model relates to a heater, in particular to a PTC heating device and an electric appliance containing the PTC heating device.
Background
(Publication No. CN 105953423A), leading-out terminal, unreliable connection, high cost
(Publication No. CN202799212U, CN2640002Y, CN2331140Y, CN2346042Y, 201621441888.3 and 201720111877.7), all of which are constructed by connecting an insert at the power supply inlet
The prior art has safety accidents that the power connection part of the PTC thermosensitive material heating device is easy to loosen and short-circuit due to the influence of drawing. In addition, the inserting sheets, inserting springs and sheaths are required to be added, so that the material cost of the product is greatly increased.
201420555835.9 By spray welding
201720221741.1 Is characterized in that the power line is directly connected to the leading-out end in a pressing mode, and the pressing part is slightly twisted and is extremely easy to break.
A PTC liquid electric heater (publication No. CN 2612898Y) is provided, wherein the power line is connected with the electrode and supplies power to the electrode, and the power line is connected with the outside through a power line inlet of the metal shell.
By adopting the technical scheme, the power line is directly connected with the electrode, so that the contact resistance is large, and the junction point of the power line is easy to fall off under the action of external force.
A PTC-heated quick electric water heater (publication No. CN 2742335Y) is characterized in that a wire on an electric control device is connected with an inserting sheet on a heating device.
By adopting the technical scheme, the safety of the PTC electrode plate can be ensured by completing the connection of the lead and the PTC electrode plate at least under the help of the inserting sheet, the inserting spring and the sheath, and meanwhile, the inserting sheet has high requirement for insertion, and if the connection is not completed with the fit part of the inserting sheet, the inserting sheet is easy to fall off from the PTC electrode plate to cause the damage of the heater.
A PTC heating element (publication No. CN 2684506Y) with a fastening terminal is provided with a buckle piece, and the buckle piece is connected to an electrode plate by punching. By adopting the technical scheme, the buckle piece is equivalent to the inserting piece, the stamping distance needs to be adjusted in real time, the abutting joint part of the inserting piece and the inserting spring is inevitably provided with a contact gap, if the connection is not completed with the abutting joint part, the inserting piece is easy to fall off from the PTC electrode piece or the abutting joint inserting spring to lead to the non-conduction of the heater, and the real-time adjustment needs to be carried out by more manpower, so that the cost is increased.
In addition, in the prior art, a connection scheme of stamping the electrode plate by adopting a connecting sheet with a flanging press-connection surface or a wrap angle press-connection surface and a heating strip is adopted, and the scheme can solve the problem of reliable press-connection of a wire set and the connecting sheet, but because the flanging press-connection surface or the wrap angle press-connection surface is in surface contact with the electrode plate, the mutual lamination is slightly uneven, the matching is easy to loose, and the loosening is caused. And the plane punch of the stamping die simultaneously applies impact pressure to the two sides of the flanging or the wrap angle, and as the contact positions of the electrode plate and the two sides of the flanging or the wrap angle are in line contact, the indentation is concentrated, and the stamping die has slight unevenness, the electrode plate is damaged and broken on the indentation line, so that the whole set of heating strips and the line group are scrapped.
To sum up: the connection mode of the power line and the electrode plate in the prior art has various potential safety hazards and reliability hazards such as poor contact, loose crimping, damaged stamping and the like.
Disclosure of utility model
The utility model aims to: the utility model solves the technical problems that the existing connection mode of the power line and the electrode plate has a plurality of safety problems of potential safety hazards and reliability hazards such as poor contact, loose crimping, damaged stamping and the like.
The technical scheme is as follows: the utility model provides the following technical scheme:
the utility model provides a PTC heating device, is in including radiating strip and laminating PTC heat sensitive material heating element on the conducting strip of radiating strip is a set of, there is temperature resistant silica gel between the heat conduction plane of radiating strip conducting strip and the heating plane of heating strip, the heater is held in special frock and makes silica gel solidification, after removing the frock, forms promptly the closely, firm integrative PTC heating device of laminating between radiating strip and the PTC heat sensitive material heating element, the clamping force of frock is 2-10Kg, the heating strip is not less than 4.
Further, the heat conducting fin of the heat dissipation strip is provided with an extension surface, the tail end of the extension surface is a connection surface, an angle between the extension surface and the connection surface is 45-180 degrees, and the connection surface is provided with a connection part for connecting a power wire harness.
Further, the connecting surface of the extending surface of the heat conducting fin of the heat radiating strip is provided with a through hole, the thickness of the connecting surface is 0.25-1.5mm, and the diameter of the through hole is 1.5-6.0mm.
The thickness of the connecting surface is the thickness of the heat conducting fin of the heat dissipating strip.
Further, a conductive sheet is attached to the connection surface, a riveting hole corresponding to the through hole in the connection surface is formed in the conductive plane of the conductive sheet, and the other end of the conductive sheet is connected with a power-supply-introduced core wire.
Further, the outer side surface of the through hole on the connecting surface is provided with a strip-shaped convex groove.
Further, after the connecting surface of the radiating strip and the butt joint flat piece are riveted into a whole, the input power wire harness and the heater are rigidly connected.
The existing connection mode of the heater body and the power supply is that an inserting sheet is riveted at the heat dissipation ripple leading-out end of the heater, an elastic inserting spring is connected at the leading-in end of the power supply in a pressing mode, and the inserting sheet is inserted into the inserting sheet manually. 1. In terms of structural principle: the connection positioning of the plug spring and the plug-in piece is that the two convex arc-shaped elastic surfaces of the plug spring are contacted with the conductive surface of the plug-in piece, and the micro convex points designed on the non-elastic arc surface of the middle part of the plug-in spring are embedded into the corresponding small round holes of the head part of the plug-in piece for positioning. Line contact positioning principle between the elastic cambered surface of the plug spring and the conductive plane of the plug sheet: because the insert is manufactured by stamping, the conductive surface of the insert cannot be subjected to surface processing, and because of the thickness error of the insert and the tiny deformation caused by the stamping process, the line contact in principle is actually the result of the fact that the elastic cambered surface of the insert spring and the protruding part of the conductive surface of the insert are in elastic point contact. Positioning principle of corresponding micro round holes from micro convex points of plug springs and plug sheets: in the production process of the plug springs and the inserting sheets and the butt joint process of the inserting sheets of the heater, the difficulty of accurate positioning when the plug springs and the inserting sheets are in butt joint is extremely high due to the fact that the inserting action, the inserting force and the inserting positions are different when the inserting sheets are manually inserted, small protruding points of the inserting sheets cannot be accurately sunk into the middle of small round holes of the inserting sheets and are not easy to perceive due to slight deviation, and the small protruding points of the inserting sheets and the small round holes of the inserting sheets are produced in batches through punching. 3. Under the dynamic factors of turnover, transportation and the like, the heating device or the product provided with the heating device inevitably causes loosening of the connecting part due to loosening and displacement of the butt joint part in production, assembly and customer use, thereby causing serious functional accidents of failure of the heater. As the plug springs at the power input end are electrified, once loose plug spring electrified bodies touch other parts of the product or different polarities, serious safety accidents such as electrification, short circuit and fire of the product can be caused. 4. Because the butt joint part of the heater is connected with the heating body, the elastic pressure of the plug spring is inevitably reduced under the influence of factors such as the material and the processing precision of the plug spring in a long-term high-temperature working environment, and the butt joint points are loosened and poor in contact to cause flashover and carbonization, so that the great hidden trouble of open circuit or short circuit of connection occurs.
Further, the riveted parts and the surface charged parts of the heater and the wire harness are sleeved with heat-resistant heat-seal sleeves for insulation and heat sealing.
Further, the surface of the heat-resistant shrink sleeve of the riveting joint part of the heater and the surface charged part of the connecting part are coated with insulating glue.
The surface electrification part is completely insulated, and the hidden trouble of short circuit caused by serious abnormality of the working state is avoided.
Further, the heater is a multi-group parallel combination of similar structure.
An electrical appliance includes a PTC heating device.
Further, the electric appliance is at least one selected from an air conditioner, a warm air blower, a hot air curtain machine, a bathroom heater, a dehumidifier, an air purifier, a clothes dryer and an automobile warm air heater.
The beneficial effects are that: compared with the prior art, the utility model has the advantages that:
The connection of the heating device and the input power supply is realized by punching or riveting the butt joint inserting sheet on the heat conduction/electric conduction sheet of the heat dissipation strip, the connecting wire harness is in press joint with the press joint part of the connecting inserting spring, and the other end of the inserting spring is elastically butt-jointed with the butt joint inserting sheet. The accompanying drawings: a device diagram with an inserting sheet and a connecting wiring diagram with an inserting spring belt. Defects in the prior art: 1. the potential safety hazard of ignition is caused by loosening or connection loosening caused by the loose crimping at the pressing point of the stamping, riveting or welding butt joint inserting piece on the heat conducting strip. 2. The hidden trouble of loosening and opening the circuit between the plug spring and the plug sheet is caused by imprecise matching between the plug spring and the plug sheet due to the fact that the plug sheet and the plug spring are not in place in butt joint. 3. After the plug spring and the plug sheet are in butt joint, an elastic and loose silica gel insulating sheath is sleeved at the joint, potential safety hazards of exposing a charged part caused by sheath sliding are easily generated, and in order to prevent contact ignition caused by connection clearance and connection looseness, although the technology of coating sealant at the joint of the plug spring and the plug sheet is adopted for remedying, the potential hazards of contact looseness still cannot be eliminated under the long-term use state due to the existence of the contact clearance. 4. The heat conduction/electric conduction sheet is easy to be damaged in crimping, and is easy to generate open circuit failure hidden trouble caused by twisting off at the crimping damaged part when being distorted by external force in use.
The utility model achieves the following effects: 1. the connection of the heating device and the input power supply is realized by direct riveting between a through hole on the conducting strip of the wire harness and a through hole of a connecting surface positioned at the tail end of the extending surface of the heat conducting/conducting strip of the heat dissipation strip, and the electric connection mode is changed from the traditional opposite-plug type elastic connection to the pressure connection type rigid connection. 2. The electric conduction mode is changed from the traditional line contact between the inserting sheet and the inserting spring by the inserting spring convex rib and the inserting sheet plane to the surface contact between the connecting sheet plane and the conducting sheet plane, so that the electric connection reliability of the product is greatly improved. 3. The riveting between the inserting sheet and the conducting strip of the radiating strip and the butt joint between the inserting spring and the inserting sheet are omitted, the process of the middle transition part of electric connection is omitted, the safety is improved, and the process is simple. 4. The insulating heat-shrinkable sleeve is heat-sealed at the electrified part of the crimping point, and the surface electrified part and the crimping point are firmly covered by the heat-shrinkable sleeve, so that the safety performance is improved. 5. The surface of the insulating heat-shrinkable sleeve and the surface of the heat-shrinkable sleeve are coated with insulating adhesive, so that the safety, the reliability and the permanence of the service life of the electric connection part are thoroughly ensured. 6. The concave-convex groove designed at the through hole of the connecting surface at the tail end of the extension surface increases the contact area of the electric connection part during crimping, improves the connection reliability, improves the crimping effect and thoroughly eliminates the hidden trouble of contact ignition caused by the electric connection gap caused by loosening of crimping. 7. A reinforcing structure of the strip-shaped anti-breakage concave groove or the convex rib is designed at the transition part between the extension surface and the connecting surface, so that the strength, the breakage resistance and the torsion resistance of the transition joint surface of the extension surface and the connecting surface are improved. 8. The utility model has the other remarkable effect of omitting accessories such as the inserting sheet, the inserting spring, the elastic silica gel sheath and the like which are necessary to be adopted in the prior art, and greatly reducing the cost of products.
Drawings
FIG. 1 is a schematic view of a structure in which the connection surface and the extension surface of a heating device are perpendicular to each other;
FIG. 2 is a schematic view of the structure of a butt-joint flat sheet of the heating device of the present utility model;
FIG. 3 is a schematic view of the structure of the heating device of the present utility model after the connecting surface and the extending surface of the heating device are connected in parallel to a power source.
Detailed Description
The present utility model provides a method and a thought, and a method for implementing the technical scheme are numerous, the above description is only a preferred embodiment of the present utility model, and it should be noted that, for those skilled in the art, several improvements and modifications can be made, and these improvements and modifications should also be regarded as protection scope of the present utility model, and each component that is not explicitly described in the present embodiment can be implemented by the prior art.
Example 1
The PTC heating device comprises at least one radiating strip 1 and PTC heat-sensitive material heating elements attached to heat-conducting fins of the radiating strip 1, wherein temperature-resistant silica gel 2 is arranged between heat-conducting fins of the radiating strip and heating surfaces of the heating fins, the heater is clamped in a special tool to completely solidify the silica gel, after the tool is removed, the PTC heating device which is tightly and firmly attached to the heat-conducting strips 1 and the PTC heat-sensitive material heating elements is formed, the clamping force of the tool is 4-10Kg, and the heating fins are not less than 4 pieces.
Example 2
The heat conducting fin of the heat dissipation strip 1 is a power supply lead-in end, the lead-in end is provided with an extension surface 3, an angle between the extension surface 3 and the lead-in end is 45 degrees, the tail end of the lead-in end is a connecting surface 4, the end part of the connecting surface 4 is a press-connection part 5, the press-connection part 5 is provided with a through hole 6, the thickness of the press-connection part 5 is 0.25-1.5mm, and the diameter of the through hole 6 is 1.5-6.0mm.
The crimping part is used as a butt joint flat piece for riveting the power supply lead. The thickness of the general outgoing surface is 0.2-0.4mm, the strength is low, the deformation is easy, the existing through hole function is to rivet the inserting sheet, the inserting sheet is connected with the inserting spring in a butt joint way, and the aperture is smaller than 2mm.
The connecting surface 4 and the extending surface 3 are integrated, the connecting surface 4 is provided with a pressing part 5, and the pressing part 5 is arranged at the tail end of the extending surface 3.
The tail end of the extension surface is used for riveting the butt joint surface connected with the power supply lead.
The crimping portion 5 is attached with the butt joint flat piece 7, one end of the butt joint flat piece 7 is provided with a crimping groove 8 for accommodating the power core wire and the insulating cladding, the power core wire and the insulating cladding are crimped in the groove 8, and a riveting hole 10 corresponding to the penetrating through hole 6 of the crimping portion 5 is formed in a butt joint plane 9 at the other end.
The surface of the pressure contact part 5 of the heat conducting fin extension surface of the heat dissipating strip 1 is provided with a strip-shaped concave-convex groove 11 which radially radiates from the center of the through hole 6 to the periphery.
The contact area between the connecting surfaces is increased, and the reliable, firm and permanent contact between the connecting surfaces after stamping is ensured.
The riveting parts between the crimping part 5 and the butt joint flat piece 7 of the heater are sleeved with heat-resistant heat-shrink sleeve pipes for insulating heat sealing.
The surface electrification part is completely insulated, and the hidden trouble of short circuit caused by serious abnormality of the working state is avoided.
The heaters may be a plurality of sets of parallel combinations of similar structures.
Example 2
An electrical appliance includes a PTC heating device.
The electric appliance is at least one selected from an air conditioner, a warm air blower, a hot air curtain machine, a bathroom heater, a dehumidifier, an air purifier, a clothes dryer and an automobile warm air heater.
Claims (4)
1. A PTC heating device characterized in that: the device comprises a heat dissipation strip and PTC heat-sensitive material heating elements attached to heat conducting fins of the heat dissipation strip, wherein temperature-resistant silica gel is arranged between the heat conducting plane of the heat dissipation strip heat conducting fins and the heating plane of the heating fins, the heat dissipation strip and the PTC heat-sensitive material heating elements are attached tightly and firmly to form an integrated PTC heating device, the clamping force of the tool is 2-10Kg, and the heating fins are not less than 4 pieces; the heat conducting fin of the heat dissipation strip is provided with an extension surface, the tail end of the extension surface is a connection surface, the angle between the extension surface and the connection surface is 45-180 degrees, and the connection surface is provided with a connection part for connecting a power wire harness; the connecting surface of the extending surface of the heat conducting fin of the heat radiating strip is provided with a through hole, the thickness of the connecting surface is 0.25-1.5mm, and the diameter of the through hole is 1.5-6.0mm; the connecting surface is attached with a conductive sheet, a riveting hole corresponding to the through hole on the connecting surface is arranged on a conductive plane of the conductive sheet, and the other end of the conductive sheet is connected with an incoming power core wire; the outer side surface of the through hole on the connecting surface is provided with a strip-shaped convex groove; after the connecting surface of the radiating strip and the butt joint flat piece are riveted into a whole, the input power wire harness and the heater are rigidly connected as a whole, and the heater is a plurality of groups of parallel combinations with similar structures.
2. A PTC heating device according to claim 1, wherein: the surface of the heat-resistant shrink sleeve of the riveting joint part of the heater and the surface charged part of the connecting part are coated with insulating glue.
3. An electrical appliance, characterized in that: a PTC heating device according to claim 1 or 2.
4. The electric appliance according to claim 3, wherein the electric appliance is at least one selected from the group consisting of an air conditioner, a fan heater, a hot air curtain, a bathroom heater, a dehumidifier, an air cleaner, a clothes dryer, and an automotive heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986586.1A CN109152110B (en) | 2018-08-21 | 2018-08-21 | PTC heating device and electric appliance comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986586.1A CN109152110B (en) | 2018-08-21 | 2018-08-21 | PTC heating device and electric appliance comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109152110A CN109152110A (en) | 2019-01-04 |
| CN109152110B true CN109152110B (en) | 2024-05-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810986586.1A Active CN109152110B (en) | 2018-08-21 | 2018-08-21 | PTC heating device and electric appliance comprising same |
Country Status (1)
| Country | Link |
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| CN (1) | CN109152110B (en) |
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| Publication number | Publication date |
|---|---|
| CN109152110A (en) | 2019-01-04 |
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Denomination of invention: A PTC heating device and an electrical appliance containing the PTC heating device Granted publication date: 20240524 Pledgee: Xiaoxian finance Company limited by guarantee Pledgor: SUZHOU GUOWEI TEMPERATURE-SENSITIVE NEW MATERIAL Co.,Ltd. Registration number: Y2024980038912 |