CN210928026U - Round metal tube PTC heater and heating device - Google Patents
Round metal tube PTC heater and heating device Download PDFInfo
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- CN210928026U CN210928026U CN201920839847.7U CN201920839847U CN210928026U CN 210928026 U CN210928026 U CN 210928026U CN 201920839847 U CN201920839847 U CN 201920839847U CN 210928026 U CN210928026 U CN 210928026U
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Abstract
The utility model provides a round metal pipe PTC heater and a heating device, the PTC heater comprises a heating core body and a metal round pipe, the heating core body comprises a PTC ceramic element, two semicircular metal electrodes and an insulating layer, the PTC ceramic element is flat, the two semicircular metal electrodes are tightly attached to the two surfaces of the PTC ceramic element, the cross section of the combination body of the PTC ceramic element and the two semicircular metal electrodes is a whole circle, and the insulating layer is wrapped on the peripheries of the PTC ceramic element and the two semicircular metal electrodes; the metal round pipe is sleeved on the periphery of the heating core body. The heat generated by the PTC ceramic element is transmitted out through the semicircular metal electrode, the insulating layer and the metal round pipe to heat the liquid, the contact area between the metal round pipe and the liquid is large, and the heat exchange performance is improved; the metal round pipe is fastened with the heating core body by adopting a pipe shrinking process, so that the thermal resistance is greatly reduced; the heating efficiency of the heater to the liquid is greatly improved, the manufacturing cost is low, and the heater is safe and reliable and has long service life.
Description
Technical Field
The utility model relates to a heater, concretely relates to circular tubular metal resonator PTC heater and heating device.
Background
The traditional heater adopts the electric heating wire to be arranged in the metal tube, and the traditional heater is largely used in production and life due to simple structure, convenient use and low price, but the heater has overhigh surface temperature, is easy to burn out in dry burning, is easy to cause fire disaster in short circuit, and is aged and damaged seriously in long-term use.
The PTC heater adopts PTC ceramic as a core heating element, the PTC ceramic has a positive temperature coefficient thermal effect, can automatically control temperature, has wide application voltage range, is free from open fire, is safe and reliable, and has long service life. The existing PTC heater adopts a PTC sheet and an electrode plate to be fastened, then the PTC sheet and the electrode plate are wrapped with insulating paper (polyimide film) and are plugged into an aluminum pipe to be pressed into the pipe, so as to form a heating aluminum pipe, the heating aluminum pipe penetrates into a stainless steel pipe, a heat-conducting medium is filled between the heating aluminum pipe and the stainless steel pipe, and the two ends of the stainless steel pipe are subjected to glue sealing treatment to prevent the heat-conducting medium from leaking. The heater has high cost, large thermal resistance and poor heat dissipation effect, and the aging of sealing glue at two ends can cause the leakage of filling media, thereby causing the great reduction of the product power.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a round metal tube PTC heater and a heating device.
In order to achieve the above object, the technical solution of the present invention is: a round metal tube PTC heater comprising:
the heating core body comprises a PTC ceramic element, two semicircular metal electrodes and an insulating layer, wherein the PTC ceramic element is flat, the two semicircular metal electrodes are tightly attached to the surfaces of the two electrodes of the PTC ceramic element, the cross section of the combination of the PTC ceramic element and the two semicircular metal electrodes is a whole circle, and the insulating layer is wrapped on the peripheries of the PTC ceramic element and the two semicircular metal electrodes;
the metal round pipe is sleeved on the periphery of the heating core body.
Compared with the prior art, the heat generated by the PTC ceramic element is transferred out through the semicircular metal electrode, the insulating layer and the metal round pipe to heat the liquid, the contact area between the metal round pipe and the liquid is large, and the heat exchange performance is improved; the structure is simple, the metal round pipe and the heating core body are subjected to pipe reducing operation by adopting pressing devices such as an oil press or a hydraulic press, all parts are in close contact, and the thermal resistance is greatly reduced; the PTC ceramic element has positive temperature coefficient effect, so that the better the heat exchange performance is, the smaller the thermal resistance is, the higher the power is, and the heating efficiency of the liquid is greatly improved; low manufacturing cost, safety, reliability and long service life.
Further, the insulating layer is a polyimide film.
Furthermore, the insulating layer is at least two layers of polyimide films, and an aluminum foil layer is arranged between at least one group of two adjacent layers of polyimide films.
Adopt above-mentioned preferred scheme, establish the aluminium foil layer between the polyimide film and can prevent that the foreign matter from stabbing the film and leading to insulating failure, promoted security performance and reliability greatly.
Further, the insulating layer also can be silica gel conducting strip or silica gel conducting strip + polyimide film, can prevent that the foreign matter from stabbing and leading to insulating inefficacy.
Further, the PTC ceramic element is formed by combining a plurality of PTC ceramic element single sheets in parallel.
Furthermore, two ends of the PTC ceramic element are provided with insulating ceramic sheets.
By adopting the preferable scheme, the insulating property of the two ends of the round metal tube PTC heater is improved.
Furthermore, the metal round pipe is made of stainless steel, aluminum or copper, the wall thickness of the metal round pipe is 0.2-2mm, and the end of the metal round pipe is sealed by a silica gel plug or silica gel.
By adopting the preferred scheme, the heat resistance of the metal round pipe is effectively reduced due to the thinner wall thickness, and the heat conduction performance is improved, so that the power of the heater is increased.
Furthermore, the semicircular metal electrode is made of aluminum or copper with high thermal conductivity.
The thermal resistance can be effectively reduced, and the power of the heater can be increased.
Further, the width of the PTC ceramic element is 5-40mm, and the length of the heating core body is 30-300 mm.
By adopting the preferable scheme, the larger width of the PTC ceramic element can improve the contact area of the PTC ceramic element and the semicircular metal electrode so as to increase the power of the heater; the longer heating core body length is beneficial to improving the contact area of the metal circular tube and the flowing liquid, and the maximization of the heater power is realized.
A heating device comprises a water passing shell and the round metal tube PTC heater, wherein the round metal tube PTC heater is arranged in the water passing shell.
By adopting the preferable scheme, the heating efficiency is high, the safety performance is high, and the cost is low.
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 these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an embodiment of the heating core of the present invention.
Names of corresponding parts represented by numerals and letters in the drawings:
1-a PTC ceramic element; 11-a single sheet of PTC ceramic elements; 12-an insulating ceramic sheet; 2-semicircular metal electrodes; 3-an insulating layer; 31-a polyimide film; a 32-aluminum foil layer; 4-metal round tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, a round metal tube PTC heater comprises:
the heating core body comprises a PTC ceramic element 1, two semicircular metal electrodes 2 and an insulating layer 3, wherein the PTC ceramic element 1 is flat, the two semicircular metal electrodes 2 are tightly attached to the surfaces of the two electrodes of the PTC ceramic element 1, the cross section of a combination of the PTC ceramic element 1 and the two semicircular metal electrodes 2 is a whole circle, and the insulating layer 3 is wrapped on the peripheries of the PTC ceramic element 1 and the two semicircular metal electrodes 2;
and the metal round pipe 4 is sleeved on the periphery of the heating core body.
The beneficial effect of adopting above-mentioned technical scheme is: the heat generated by the PTC ceramic element 1 is transmitted out through the semicircular metal electrode 2, the insulating layer 3 and the metal round tube 4 to heat the liquid, the contact area of the metal round tube 4 and the liquid is large, and the heat exchange performance is improved; the structure is simple, the metal round pipe and the heating core body are subjected to pipe reducing operation by adopting pressing devices such as an oil press or a hydraulic press, all the parts are in close contact, and the thermal resistance is reduced; the PTC ceramic element has positive temperature coefficient effect, so that the better the heat exchange performance is, the smaller the thermal resistance is, the higher the power is, and the heating efficiency of the liquid is greatly improved; low manufacturing cost, safety, reliability and long service life.
As shown in fig. 2, in other embodiments of the present invention, the insulating layer 3 is a polyimide film; the insulating layer 3 is at least two layers of polyimide films 31, and an aluminum foil layer 32 is arranged between at least one group of two adjacent layers of polyimide films 31. The beneficial effect of adopting above-mentioned technical scheme is: establish the aluminium foil layer between polyimide film and can prevent that the foreign matter from stabbing the film and leading to insulating inefficacy, promoted security performance and reliability greatly.
In other embodiments of the present invention, the insulating layer 3 is a heat-conductive silicone sheet, or a heat-conductive silicone sheet plus polyimide film, as shown in fig. 2. The beneficial effect of adopting above-mentioned technical scheme is: utilize the heat conduction gasket elasticity can prevent that the foreign matter from stabbing and lead to insulating inefficacy, promoted security performance and reliability greatly.
As shown in fig. 3, in another embodiment of the present invention, the PTC ceramic element 1 is formed by combining a plurality of PTC ceramic element pieces 11 in parallel. The two ends of the PTC ceramic element 1 are provided with insulating ceramic sheets 12. The beneficial effect of adopting above-mentioned technical scheme is: the insulating property of the two ends of the round metal tube PTC heater is improved.
In other embodiments of the present invention, the metal round tube is made of stainless steel, aluminum or copper, the wall thickness of the metal round tube is 0.2-2mm, and the end of the metal round tube is sealed by a silica gel plug or silica gel. The beneficial effect of adopting above-mentioned technical scheme is: the thin wall thickness effectively reduces the thermal resistance of the metal round tube, improves the heat conducting performance and increases the power of the heater.
In other embodiments of the present invention, the PTC ceramic element has a width of 5 to 40mm, and the heating core has a length of 30 to 300 mm. The beneficial effect of adopting above-mentioned technical scheme is: the larger width of the PTC ceramic element can improve the contact area of the PTC ceramic element and the semicircular metal electrode so as to increase the power of the heater; the longer heating core body length is beneficial to improving the contact area of the metal circular tube and the flowing liquid, and the maximization of the heater power is realized.
A heating device comprises a water passing shell and the round metal tube PTC heater, wherein the round metal tube PTC heater is arranged in the water passing shell. The beneficial effect of adopting above-mentioned technical scheme is: high heating efficiency, high safety performance and low cost.
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 round metal tube PTC heater, comprising:
the heating core body comprises a PTC ceramic element, two semicircular metal electrodes and an insulating layer, wherein the PTC ceramic element is flat, the two semicircular metal electrodes are tightly attached to the surfaces of the two electrodes of the PTC ceramic element, the cross section of the combination of the PTC ceramic element and the two semicircular metal electrodes is a whole circle, and the insulating layer is wrapped on the peripheries of the PTC ceramic element and the two semicircular metal electrodes; the PTC ceramic element is formed by combining a plurality of PTC ceramic element single sheets in parallel;
the metal round pipe is sleeved on the periphery of the heating core body.
2. The round metal tube PTC heater according to claim 1, wherein the round metal tube and the heating core are fastened by interference using a tube shrinking process.
3. A round metal tube PTC heater according to claim 1, wherein the insulating layer is a polyimide film.
4. A round metal tube PTC heater according to claim 3, wherein the insulation layer is at least two polyimide films and an aluminum foil layer is provided between at least one set of two adjacent polyimide films.
5. A round metal tube PTC heater according to claim 1, wherein the insulating layer is a silicone heat conducting sheet or a combination of a silicone heat conducting sheet and a polyimide film.
6. A round metal tube PTC heater according to claim 1, wherein the PTC ceramic elements are provided with insulating ceramic sheets at both ends.
7. A round metal tube PTC heater according to claim 6, wherein the width of the PTC ceramic element is 5-40mm and the length of the heating core is 30-300 mm.
8. A round metal tube PTC heater according to claim 1, wherein the round metal tube is made of stainless steel, aluminum or copper, the wall thickness of the round metal tube is 0.2-2mm, and the end of the round metal tube is sealed by a silica gel plug or silica gel.
9. A round metal tube PTC heater according to claim 1, wherein the semicircular metal electrode is made of aluminum or copper with high thermal conductivity.
10. A heating device comprising a water housing and at least one round metal tube PTC heater according to any one of claims 1-9 mounted within the water housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920839847.7U CN210928026U (en) | 2019-06-04 | 2019-06-04 | Round metal tube PTC heater and heating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920839847.7U CN210928026U (en) | 2019-06-04 | 2019-06-04 | Round metal tube PTC heater and heating device |
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| Publication Number | Publication Date |
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| CN210928026U true CN210928026U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920839847.7U Active CN210928026U (en) | 2019-06-04 | 2019-06-04 | Round metal tube PTC heater and heating device |
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| CN (1) | CN210928026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110248431A (en) * | 2019-06-04 | 2019-09-17 | 江苏钧瓷科技有限公司 | A kind of round metal tube ptc heater and heating device |
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2019
- 2019-06-04 CN CN201920839847.7U patent/CN210928026U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110248431A (en) * | 2019-06-04 | 2019-09-17 | 江苏钧瓷科技有限公司 | A kind of round metal tube ptc heater and heating device |
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