CN214481324U - A waterproof construction and PTC heater for PTC heater - Google Patents
A waterproof construction and PTC heater for PTC heater Download PDFInfo
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- CN214481324U CN214481324U CN202120420778.3U CN202120420778U CN214481324U CN 214481324 U CN214481324 U CN 214481324U CN 202120420778 U CN202120420778 U CN 202120420778U CN 214481324 U CN214481324 U CN 214481324U
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Abstract
The utility model discloses a waterproof construction for PTC heater, include: PTC heating element, metal pipe and waterproof assembly, wherein the cross section of PTC heating element is polygonal; the metal pipe is sleeved outside the PTC heating element and used for fixing the PTC heating element and dissipating heat; the waterproof assembly is used to prevent external moisture from entering the inside of the PTC heating element or between the PTC heating element and the metal pipe. The utility model discloses introduce waterproof assembly in the PTC heater, waterproof assembly had both been established at the both ends of tubular metal resonator and PTC heating element's junction, established again in the clearance that forms between PTC heating element and the tubular metal resonator to prevent that the comdenstion water from getting into inside the PTC heating element or getting into between tubular metal resonator and the heating element, thereby effectively promote the security and the stability of PTC heater.
Description
Technical Field
The utility model relates to a waterproof technical field of heater, concretely relates to a waterproof construction and PTC heater for PTC heater.
Background
Due to the special positive temperature coefficient characteristic, the PTC heater product is widely applied to heating in the field of household appliances, such as air conditioner auxiliary heating, a fan heater, a bath heater and the like; defrosting, warming and the like of the traditional fuel oil automobile; heating in the new energy automobile, battery heating and the like. In the field of high-power heating, the application range of the PTC heater is still expanding.
The PTC heater adopts PTC ceramic as a core heating element, and has the advantages of automatic temperature control, wide application voltage range, no open fire, safety, reliability, long service life and the like compared with the traditional heating wire, electric heating tube and far infrared quartz heater.
As for the PTC heater applied to the auxiliary heating of the air conditioner, because the heater is close to the evaporator, in summer, the evaporator can generate condensed water, and if the condensed water enters the PTC heating pipe, the safety problems of poor insulation and the like can be caused. In order to prevent condensed water from entering the heater and affecting the safety performance of the heater, the heater is generally subjected to waterproofing treatment.
In the prior art, the head waterproof structure of the existing heater is generally sealed by mainly partially gluing or totally gluing an end joint surface, the problems of incomplete sealing and leakage points generally exist in local gluing, the waterproof effect is poor, and potential safety hazards are brought to the heater; and the head part and the tail part are completely sealed by all glue coating, and too tight sealing can cause that the internal reducing gas and moisture can not be discharged, thereby causing the performance deterioration of the PTC sheet.
Therefore, there is a need in the art for a waterproof structure that is simple in structure, easy and fast to install, has good sealing performance, and can exhaust internal gas.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a simple structure, simple to operate are swift, can block that the comdenstion water gets into inside, the inside gaseous waterproof construction of exhaling again of heater from the tip.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
in one aspect, disclosed is a waterproof structure for a PTC heater, including: the PTC heating element is in a strip shape, and the cross section of the PTC heating element is polygonal; the metal pipe is sleeved outside the PTC heating element and used for fixing the PTC heating element and dissipating heat generated by the PTC heating element, the metal pipe comprises a flat section and a raised section, the outer surface of the flat section is flat and used for fixing a radiating fin, and the inner wall of the metal pipe of the flat section is in contact with the outer surface plane of the PTC heating element; the bulged section is arranged between two adjacent flat sections, and a gap exists between the inner wall of the metal pipe of the bulged section and the PTC heating element; the waterproof assembly is arranged at two ends of the PTC heating element and at the joint of two ends of the metal pipe and the PTC heating element and used for preventing external moisture from entering the inside of the PTC heating element or entering the PTC heating element and between the metal pipes.
The beneficial effect of adopting above-mentioned technical scheme is: the waterproof structure of the PTC heater in the prior art is universally considered or the technical problems that leakage points exist in a sealing mode, the waterproof effect and the safety are poor, or the inside gas cannot be discharged due to full sealing to influence the PTC performance and the service life are solved.
As a further improvement of the technical proposal of the utility model, the PTC heating element comprises a PTC ceramic piece, insulating paper and a metal electrode piece; the number of the metal electrode plates is two, each metal electrode plate comprises a working section and a wiring section, the two metal electrode plates are aligned, and the working sections and the wiring sections of the two metal electrode plates are respectively corresponding to each other; the PTC ceramic plate is clamped between the working sections of the two metal electrode plates; and the insulating paper is wrapped on the outer surface of the working section of the metal electrode plate.
The beneficial effect of adopting above-mentioned technical scheme is: the insulating paper is arranged to prevent the metal electrode plate from conducting electricity with the metal pipe, and the metal electrode plate and the PTC ceramic piece are tightly attached together through winding and wrapping, so that the low heating efficiency and poor effect of the PTC heater caused by the looseness of the metal electrode plate and the PTC ceramic piece in the metal pipe are prevented.
As the utility model discloses technical scheme's further improvement again, waterproof component is including sealed glue, sealed glue is filled the both ends of tubular metal resonator with the junction that has the space between the insulated paper surface, sealed glue is filled junction between the terminal surface of PTC potsherd and the metal electrode piece.
The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the sealant is convenient for sealing, and particularly, the waterproof effect is better for the special-shaped gap between the metal tube and the PTC ceramic plate.
As the utility model discloses technical scheme's further improvement again, PTC heating element's appearance is the rectangle, sealed glue is filled the uplift district section at the both ends of tubular metal resonator with the space department that the insulated paper surface formed, just the level district section at the both ends of tubular metal resonator with the insulated paper surface has at least one nothing sealed glue is sealed.
The beneficial effect of adopting above-mentioned technical scheme is: the metal pipe is sleeved on the periphery of the PTC heating element and is deformed into a shape similar to the rectangle of the PTC heating element through extrusion, a bulge section is formed inevitably at an uncompressed position or between two adjacent extruded flat sections, a gap is formed between the bulge section and the insulation paper of the PTC heating element, the gap is sealed through a sealant, but the flat sections and the insulation paper are compressed, and condensed water is difficult to enter the PTC heating element from the joint, so that at least one position of the flat sections at two ends of the metal pipe and the outer surface of the insulation paper is not sealed, the waterproof effect is not influenced, the head and the tail are prevented from being completely sealed, and reducing gas and water gas are conveniently and smoothly discharged.
As the utility model discloses technical scheme's further improvement again, sealed glue is silica gel.
The beneficial effect of adopting above-mentioned technical scheme is: the joint between the PTC heating element and the metal tube and the end part of the PTC heating element are sealed and waterproof by taking the silica gel as the sealant, and the excellent characteristics of stable chemical property, strong adsorption capacity, no combustion and high safety of the silica gel are fully utilized.
As a further improvement of the technical scheme of the utility model, waterproof assembly still includes the elastic sealing cover, the elastic sealing cover is established PTC heating element's surface, and sealed the terminal surface of tubular metal resonator.
The beneficial effect of adopting above-mentioned technical scheme is: the elastic sealing sleeve is arranged to provide another sealing and waterproof method for the joint between the PTC heating element and the metal pipe, and the elastic sealing sleeve is arranged on the outer surface of the PTC heating element by being close to the end face of the metal pipe, so that condensed water can be effectively prevented from entering a gap between the PTC heating element and the metal pipe.
As a further improvement of the technical scheme of the present invention, the elastic sealing sleeve includes a through inner hole and a sleeve port, the shape of the inner hole is consistent with the shape of the PTC heating element, and the size of the inner hole is slightly smaller than the shape size of the PTC heating element; the shape of the sleeving port is consistent with the shape of the metal pipe, and the size of the sleeving port is slightly smaller than the shape of the metal pipe.
The beneficial effect of adopting above-mentioned technical scheme is: the size of the inner hole is slightly smaller than the overall dimension of the PTC heating element, the size of the sleeved port is slightly smaller than the overall dimension of the metal pipe, the elasticity of the elastic sealing sleeve is fully utilized, the tightness between the inner hole of the elastic sealing sleeve and the PTC heating element and between the sleeved port and the metal pipe are enhanced, and the waterproof effect of the elastic sealing sleeve is further improved.
As a further improvement of the technical scheme of the utility model, the elastic sealing sleeve is provided with a one-way sealing opening on the bottom surface close to the inner hole, and when the pressure of the inner side of the elastic sealing sleeve is greater than the pressure of the outer side of the elastic sealing sleeve, the one-way sealing opening is opened from inside to outside and is in an open state; when the outer pressure of the elastic sealing sleeve is greater than or equal to the inner pressure, the one-way sealing port is in a sealing state.
The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the one-way sealing port can prevent condensed water from entering the elastic sealing sleeve from the outer side, and can also remove the reducing gas and the water gas in the PTC heating element, so that the good waterproof effect is kept, the discharge of redundant gas in the PTC heating element is not influenced, and the safety performance and the service life of the PTC heater are further improved.
As the technical proposal of the utility model is further improved, the metal tube is an aluminum tube.
The beneficial effect of adopting above-mentioned technical scheme is: the aluminum pipe is used as the metal pipe, the aluminum pipe is fully utilized to have the advantages of light weight, corrosion resistance, good plastic property and good heat conduction property, the attaching effect of the aluminum pipe and the PTC heating element after being compressed is better, and the waterproof property of the aluminum pipe is effectively improved.
On the other hand, still further disclose a PTC heater, including the waterproof construction for PTC heater of any one of above-mentioned technical scheme.
The beneficial effect of adopting above-mentioned technical scheme is: the PTC heater with the waterproof structure comprises the PTC heater with the waterproof structure, and the waterproof structure can effectively solve the problems of the waterproof structure of the PTC heater in the prior art, can effectively improve the waterproof performance of the PTC heater, and can smoothly discharge redundant reducing gas and water vapor in the PTC heating element.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a waterproof structure for a PTC heater head according to the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic view of another waterproof assembly according to the present invention;
FIG. 4 is a schematic view of a waterproofing structure comprising another waterproofing assembly of FIG. 3;
FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 4;
the corresponding part names indicated by the numbers in the figures are as follows:
a PTC heating element 1; a PTC ceramic sheet 11; an insulating paper 12; a metal electrode sheet 13; a working section 131; a wire segment 132; a metal tube 2; a leveling section 21; a raised section 22; a waterproof component 3; a sealant 31; a silica gel 311; a resilient sealing sleeve 32; an inner bore 321; a socket port 322; one-way seal 323.
Detailed Description
To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In order to realize the utility model discloses a purpose, the utility model provides a technical scheme does:
in one aspect, in some embodiments of the present invention, as shown in fig. 1-2, a waterproof structure for a PTC heater includes: the PTC heating element comprises a PTC heating element 1, a metal tube 2 and a waterproof assembly 3, wherein the PTC heating element 1 is in a strip shape, and the cross section of the PTC heating element 1 is polygonal; the metal tube 2 is sleeved outside the PTC heating element 1 and used for fixing the PTC heating element 1 and dissipating heat generated by the PTC heating element 1, the metal tube 2 comprises a flat section 21 and a raised section 22, the outer surface of the flat section 21 is flat and used for fixing a radiating fin, and the inner wall of the metal tube of the flat section 21 is in contact with the outer surface plane of the PTC heating element 1; the raised section 22 is arranged between two adjacent flat sections 21, and a gap exists between the inner wall of the metal pipe of the raised section 22 and the PTC heating element 1; and waterproof assemblies 3 provided at both ends of the PTC heating element 1 and at the junctions of both ends of the metal tube 2 and the PTC heating element 1, for preventing external moisture from entering the inside of the PTC heating element 1 or between the PTC heating element 1 and the metal tube 2.
The beneficial effect of adopting above-mentioned technical scheme is: the waterproof structure of the PTC heater in the prior art is universally provided with leakage points or is sealed, the waterproof effect and the safety are poor, or the technical problems that the PTC performance and the service life are influenced due to the fact that internal gas cannot be discharged due to full sealing are fully considered.
In other embodiments of the present invention, as shown in fig. 2, the PTC heating element 1 includes a PTC ceramic sheet 11, an insulating paper 12, and a metal electrode sheet 13; the number of the metal electrode plates 13 is two, each metal electrode plate 13 comprises a working section 131 and a wiring section 132, the two metal electrode plates 13 are aligned, and the working sections 131 and the wiring sections 132 respectively correspond to each other; the PTC ceramic sheet 11 is clamped between the working sections 131 of the two metal electrode sheets 13; and the insulating paper 12 is wrapped on the outer surface of the working section 131 of the metal electrode sheet 13.
The beneficial effect of adopting above-mentioned technical scheme is: the insulating paper is arranged to prevent the metal electrode plate and the metal tube from conducting electricity, and the metal electrode plate and the PTC ceramic piece are tightly attached together by winding and wrapping, so that the low heating efficiency and poor effect of the PTC heater caused by the looseness of the metal electrode plate and the PTC ceramic piece in the metal tube are prevented.
In other embodiments of the present invention, as shown in fig. 1-2, the waterproof assembly 3 includes a sealant 31, the sealant 31 is filled in the joint between the two ends of the metal tube 2 and the outer surface of the insulating paper 12, and the sealant 31 is filled in the joint between the end surface of the PTC ceramic sheet 11 and the metal electrode sheet 13.
The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the sealant is convenient for sealing, and particularly, the waterproof effect is better for the special-shaped gap between the metal tube and the PTC ceramic plate.
In other embodiments of the present invention, as shown in fig. 2, the shape of the PTC heating element 1 is rectangular, the sealant 31 is filled in the gap between the protruding section 22 at the two ends of the metal tube 2 and the outer surface of the insulating paper 12, and at least one of the flat section 21 at the two ends of the metal tube 2 and the outer surface of the insulating paper 12 is sealed without the sealant 31.
The beneficial effect of adopting above-mentioned technical scheme is: the metal pipe is sleeved on the periphery of the PTC heating element and is deformed into a shape similar to the rectangle of the PTC heating element through extrusion, a bulge section is formed inevitably at an uncompressed position or between two adjacent extruded flat sections, a gap is formed between the bulge section and the insulation paper of the PTC heating element, the gap is sealed through a sealant, but the flat sections and the insulation paper are compressed, and condensed water is difficult to enter the PTC heating element from the joint, so that at least one position of the flat sections at two ends of the metal pipe and the outer surface of the insulation paper is not sealed, the waterproof effect is not influenced, the head and the tail are prevented from being completely sealed, and reducing gas and water gas are conveniently and smoothly discharged.
In other embodiments of the present invention, the sealant 31 is a silicone gel 311.
The beneficial effect of adopting above-mentioned technical scheme is: the joint between the PTC heating element and the metal tube and the end part of the PTC heating element are sealed and waterproof by taking the silica gel as the sealant, and the excellent characteristics of stable chemical property, strong adsorption capacity, no combustion and high safety of the silica gel are fully utilized.
In other embodiments of the present invention, as shown in fig. 3, the waterproof assembly 3 further includes an elastic sealing sleeve 32, the elastic sealing sleeve 32 is sleeved on the outer surface of the PTC heating element 1, and seals the end surface of the metal tube 2.
The beneficial effect of adopting above-mentioned technical scheme is: the elastic sealing sleeve is arranged to provide another sealing and waterproof method for the joint between the PTC heating element and the metal pipe, and the elastic sealing sleeve is arranged on the outer surface of the PTC heating element by being close to the end face of the metal pipe, so that condensed water can be effectively prevented from entering a gap between the PTC heating element and the metal pipe.
In other embodiments of the present invention, as shown in fig. 3, the elastic sealing sleeve 32 includes a through inner hole 321 and a socket port 322, the shape of the inner hole 321 is consistent with the shape of the PTC heating element 1, and the size of the inner hole 321 is slightly smaller than the shape of the PTC heating element 1; the shape of the socket port 322 is identical to the outer shape of the metal pipe 2, and the size of the socket port 322 is slightly smaller than the outer shape of the metal pipe 2.
The beneficial effect of adopting above-mentioned technical scheme is: the size of the inner hole is slightly smaller than the overall dimension of the PTC heating element, the size of the sleeved port is slightly smaller than the overall dimension of the metal pipe, the elasticity of the elastic sealing sleeve is fully utilized, the tightness between the inner hole of the elastic sealing sleeve and the PTC heating element and between the sleeved port and the metal pipe are enhanced, and the waterproof effect of the elastic sealing sleeve is further improved.
In other embodiments of the present invention, as shown in fig. 4-5, the elastic sealing sleeve 32 is provided with a one-way sealing port 323 on the bottom surface near the inner hole 321, when the pressure inside the elastic sealing sleeve 32 is greater than the pressure outside the elastic sealing sleeve, the one-way sealing port 323 is opened from inside to outside, and is in an open state; when the outside pressure of the elastic sealing sleeve 32 is greater than or equal to the inside pressure thereof, the one-way sealing port 323 is in a sealed state.
The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the one-way sealing port can prevent condensed water from entering the elastic sealing sleeve from the outer side, and can also remove the reducing gas and the water gas in the PTC heating element, so that the good waterproof effect is kept, the discharge of redundant gas in the PTC heating element is not influenced, and the safety performance and the service life of the PTC heater are further improved.
In other embodiments of the present invention, the metal pipe 2 is an aluminum pipe.
The beneficial effect of adopting above-mentioned technical scheme is: the aluminum pipe is used as the metal pipe, the aluminum pipe is fully utilized to have the advantages of light weight, corrosion resistance, good plastic property and good heat conduction property, the attaching effect of the aluminum pipe and the PTC heating element after being compressed is better, and the waterproof property of the aluminum pipe is effectively improved.
On the other hand, the invention further discloses a PTC heater in other embodiments, which comprises the waterproof structure for the PTC heater in any one of the above technical solutions.
The beneficial effect of adopting above-mentioned technical scheme is: the PTC heater with the waterproof structure comprises the PTC heater with the waterproof structure, and the waterproof structure can effectively solve the problems of the waterproof structure of the PTC heater in the prior art, can effectively improve the waterproof performance of the PTC heater, and can smoothly discharge redundant reducing gas and water vapor in the PTC heating element.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (10)
1. A waterproof structure for a PTC heater, characterized by comprising: PTC heating element, metal tube and water-proof component,
the PTC heating elements are in a strip shape, and the cross sections of the PTC heating elements are in a polygon shape;
the metal pipe is sleeved outside the PTC heating element and used for fixing the PTC heating element and dissipating heat generated by the PTC heating element, the metal pipe comprises a flat section and a raised section, the outer surface of the flat section is flat and used for fixing a radiating fin, and the inner wall of the metal pipe of the flat section is in contact with the outer surface plane of the PTC heating element; the bulged section is arranged between two adjacent flat sections, and a gap exists between the inner wall of the metal pipe of the bulged section and the PTC heating element;
the waterproof assembly is arranged at two ends of the PTC heating element and at the joint of two ends of the metal pipe and the PTC heating element and used for preventing external moisture from entering the inside of the PTC heating element or entering the PTC heating element and between the metal pipes.
2. The waterproof structure for a PTC heater according to claim 1, wherein the PTC heating element comprises a PTC ceramic sheet, an insulating paper, and a metal electrode sheet; the number of the metal electrode plates is two, each metal electrode plate comprises a working section and a wiring section, the two metal electrode plates are aligned, and the working sections and the wiring sections of the two metal electrode plates are respectively corresponding to each other; the PTC ceramic plate is clamped between the working sections of the two metal electrode plates; and the insulating paper is wrapped on the outer surface of the working section of the metal electrode plate.
3. The waterproof structure for a PTC heater according to claim 2, wherein the waterproof member comprises a sealant, the sealant is filled in a joint having a gap between both ends of the metal tube and the outer surface of the insulating paper, and the sealant is filled in a joint between an end surface of the PTC ceramic sheet and the metal electrode sheet.
4. The waterproof structure for a PTC heater according to claim 3, wherein the PTC heating element has a rectangular shape, the sealant is filled in a gap formed between the bulging sections at both ends of the metal tube and the outer surface of the insulating paper, and at least one of the flat sections at both ends of the metal tube and the outer surface of the insulating paper is not sealed by the sealant.
5. The waterproof structure for a PTC heater according to claim 4, wherein the sealant is a silicone rubber.
6. The waterproof structure for a PTC heater according to claim 2, wherein the waterproof assembly further comprises an elastic sealing boot which is fitted over an outer surface of the PTC heating element and seals an end surface of the metal tube.
7. The waterproof structure for a PTC heater according to claim 6, wherein the elastic sealing boot includes a through inner hole and a socket port, the inner hole has a shape conforming to the outer shape of the PTC heating element, and the size of the inner hole is slightly smaller than the outer size of the PTC heating element; the shape of the sleeving port is consistent with the shape of the metal pipe, and the size of the sleeving port is slightly smaller than the shape of the metal pipe.
8. The waterproof structure for a PTC heater according to claim 7, wherein the elastic sealing sleeve is provided with a one-way sealing port on a bottom surface near the inner hole, and when the inner side pressure of the elastic sealing sleeve is greater than the outer side pressure thereof, the one-way sealing port is opened from the inside to the outside in an open state; when the outer pressure of the elastic sealing sleeve is greater than or equal to the inner pressure, the one-way sealing port is in a sealing state.
9. The waterproof structure for a PTC heater according to claim 1, wherein the metal tube is an aluminum tube.
10. A PTC heater comprising the waterproof structure for a PTC heater according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120420778.3U CN214481324U (en) | 2021-02-25 | 2021-02-25 | A waterproof construction and PTC heater for PTC heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120420778.3U CN214481324U (en) | 2021-02-25 | 2021-02-25 | A waterproof construction and PTC heater for PTC heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214481324U true CN214481324U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120420778.3U Active CN214481324U (en) | 2021-02-25 | 2021-02-25 | A waterproof construction and PTC heater for PTC heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214481324U (en) |
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2021
- 2021-02-25 CN CN202120420778.3U patent/CN214481324U/en active Active
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