CN214756955U - Safe and reliable's thick film heater - Google Patents
Safe and reliable's thick film heater Download PDFInfo
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- CN214756955U CN214756955U CN202121012554.5U CN202121012554U CN214756955U CN 214756955 U CN214756955 U CN 214756955U CN 202121012554 U CN202121012554 U CN 202121012554U CN 214756955 U CN214756955 U CN 214756955U
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- thick film
- film heating
- fuse
- heating circuit
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Abstract
The utility model relates to a safe and reliable thick film heater, which comprises a heat conducting substrate and a thick film heating layer arranged on the heat conducting substrate; the thick film heating layer comprises more than two sections of thick film heating circuits, a fuse is connected between the two sections of thick film heating circuits, and the fuse is tightly attached to the heat-conducting substrate and/or the thick film heating circuit. The thick film heater has the advantages of rapid protection action, sensitive response, reliable protection performance and high safety factor.
Description
Technical Field
The utility model relates to a thick film heating device specifically is a safe and reliable's thick film heater.
Background
In order to prevent the thick film heater from being burnt, a protective device is generally arranged on part of the thick film heater in the market, for example, the thick film heating protective device disclosed in chinese patent CN206100487U specifically discloses: the thick film heating body comprises a substrate, and an insulating layer, a thick film heating circuit, a conductive layer and a covering layer which are arranged on the substrate, wherein the thick film heating circuit comprises a first heating trace and a second heating trace, and the conductive layer comprises a first conductive piece; and the temperature controller is welded on the first conductive piece on the substrate through soldering tin, and the first heating trace and the second heating trace of the thick film heating circuit on the substrate are connected in series. The device is characterized in that a temperature controller is connected between two heating traces in series, the temperature controller monitors the heating temperature of a thick film heating circuit to achieve an anti-dry heating effect, but the temperature controller can be achieved only through a plurality of layers of media, so that the protection action is slow; in addition, the temperature controller is easy to have faults to cause the failure of the protection performance; and the temperature controller has larger volume and occupies more space positions.
Accordingly, further improvements to existing thick film heaters are needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of above-mentioned prior art existence, and provide a safe and reliable's thick film heater, this thick film heater's protection action is rapid, and the reaction is sensitive, and protective properties is reliable, and factor of safety is high.
The purpose of the utility model is realized like this:
a safe and reliable thick film heater comprises a heat-conducting substrate and a thick film heating layer arranged on the heat-conducting substrate; the thick film heating layer comprises more than two sections of thick film heating circuits, a fuse is connected between the two sections of thick film heating circuits, and the fuse is tightly attached to the heat-conducting substrate and/or the thick film heating circuit.
Thick film heating circuit tip is equipped with the contact, pin and corresponding contact electric connection on the fuse.
The contact is the pad, pin and contact electric property welding on the fuse.
The contact is the jack, and pin and contact electrical property grafting on the fuse.
And a trigger fusing part is arranged on the thick film heating circuit, and the fuse is transversely attached to the trigger fusing part.
The fuse comprises a fusing part fused at high temperature, and the fusing part is connected between the two thick film heating circuits in series.
An insulating medium layer is arranged between the heat-conducting substrate and the thick film heating layer.
When the thick film heating circuit is provided with two sections, one end of the thick film heating circuit is electrically connected with the power supply terminal, and the other end of the thick film heating circuit is electrically connected with the corresponding fuse; when the thick film heating circuit is arranged to be more than three sections, one end of the thick film heating circuit at the beginning section and the end section is electrically connected with the power supply terminal, the other end of the thick film heating circuit at the end section is electrically connected with the corresponding fuse, and two ends of the thick film heating circuit in the middle are electrically connected with the corresponding fuses respectively.
The thick film heating circuit is laid out in an arcuate and/or spiral track.
The utility model has the advantages as follows:
through the fuse that establishes ties between two thick film heating circuit, and the fuse hugs closely heat conduction base plate and/or thick film heating circuit, makes heat direct transfer to fuse, and the fuse can fuse rapidly when appearing dry combustion method to reach the guard action. The dry burning prevention mode has the advantages of rapid protection action, sensitive response, reliable protection performance, high safety factor, low material cost, low failure rate and small overall volume.
Drawings
Fig. 1 is a schematic structural diagram of a thick film heater according to a first embodiment of the present invention.
Fig. 2 is a schematic view of a partial structure of a thick film heater according to a first embodiment of the present invention.
Fig. 3 is a partial cross-sectional view of a thick film heater according to a first embodiment of the present invention in a normal use state.
Fig. 4 is a partial cross-sectional view of the thick film heater in a blown state according to the first embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a thick film heater according to a second embodiment of the present invention.
Fig. 6 is a schematic view of a partial structure of a thick film heater according to a second embodiment of the present invention.
Fig. 7 is a partial cross-sectional view of a thick film heater according to a second embodiment of the present invention.
Fig. 8 is a partial cross-sectional view of a thick film heater according to a third embodiment of the present invention.
Fig. 9 is a partial cross-sectional view of a thick film heater according to a fourth embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a thick film heater according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
First embodiment
Referring to fig. 1 to 4, the safe and reliable thick film heater a includes a heat conducting substrate 1 and a thick film heating layer 3 disposed on the heat conducting substrate 1, wherein the heat conducting substrate 1 is a stainless steel plate, and the thick film heating layer 3 is printed on the heat conducting substrate 1 by a screen printing technique; the thick film heating layer 3 comprises two sections of thick film heating circuits 301, a fuse 4 is connected in series between the two sections of thick film heating circuits 301, and the fuse 4 is tightly attached to the heat conducting substrate 1. In the thick film heater A, the two thick film heating circuits 301 are mutually connected in series through the fuse 4, the fuse 4 is tightly attached to the heat conducting substrate 1, heat is directly transferred to the fuse 4, and if the fuse 4 is fused due to overhigh heat, the two thick film heating circuits 301 are disconnected, so that an anti-dry heating effect is achieved; the dry burning prevention mode has the advantages of rapid protection action, sensitive response, reliable protection performance, high safety factor, low material cost, low failure rate and small overall volume.
Further, the end of the thick film heating circuit 301 is provided with a contact 302, and the pin 402 at the end of the fuse 4 is electrically connected with the corresponding contact 302. Specifically, the contact 302 according to the present embodiment is a pad, and the pin 402 at the end of the fuse 4 is electrically soldered to the contact 302.
Further, the fuse 4 includes a fusing member 401 fused at a high temperature, and the fusing member 401 is connected in series between the two thick film heating circuits 301. Specifically, the fusing member 401 is a tin bar or other metal bar that is broken by heat; the fuse 4 includes a heat conductive housing 403, a fuse element 401 disposed inside the heat conductive housing 403, and a pin 402 disposed at an end of the heat conductive housing 403 and electrically connected to the fuse element 401.
Further, an insulating medium layer 2 is arranged between the heat conducting substrate 1 and the thick film heating layer 3.
Further, in the two thick film heating circuits 301 according to the present embodiment, one end of each thick film heating circuit 301 is electrically connected to the power supply terminal, and the other end is electrically connected to the corresponding fuse 4.
Further, the thick film heating circuit 301 is preferably laid out in an arcuate track, but may be laid out in a spiral track.
Second embodiment
Referring to fig. 5-7, the present embodiment is directed to a thick film heater different from the first embodiment in that: the thick film heating circuit 301 is provided with a trigger fuse 303, and the fuse 4 is closely attached to the trigger fuse 303 in a straddling manner. The trigger fuse 303 is a portion of the thick film heating circuit 301 that is bent in a meandering manner.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
Third embodiment
Referring to fig. 8, the present embodiment is directed to a thick film heater different from the first embodiment in that: the contact 302 is a jack, and the pin 402 of the fuse 4 is electrically connected to the contact 302. The fuse 4 can be installed through the plug-in mode to be convenient for the later stage to change the fuse 4 of trouble or fusing.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
Fourth embodiment
Referring to fig. 9, the present embodiment is directed to a thick film heater different from the first embodiment in that: the thick film heating circuit 301 is provided with a trigger fuse 303, and the fuse 4 is closely attached to the trigger fuse 303 in a straddling manner. The trigger fuse portion 303 is a portion of the arbitrary thick film heating circuit 301 passing below the fuse 4.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
Fifth embodiment
Referring to fig. 10, the present embodiment is directed to a thick film heater different from the first embodiment in that: thick film heating circuit 301 sets up the three-section, and wherein, thick film heating circuit 301 one end electric connection power terminal, the corresponding fuse 4 of other end electric connection of beginning and end, thick film heating circuit 301 both ends difference electric connection corresponding fuse 4 in the middle of.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be protected. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A safe and reliable thick film heater comprises a heat-conducting substrate (1) and a thick film heating layer (3) arranged on the heat-conducting substrate (1); the method is characterized in that: thick film heating layer (3) include thick film heating circuit (301) more than two sections, are connected with fuse (4) between two sections thick film heating circuit (301), and heat conduction base plate (1) and/or thick film heating circuit (301) are hugged closely in fuse (4).
2. A safe and reliable thick film heater as claimed in claim 1, wherein: thick film heating circuit (301) tip is equipped with contact (302), and pin (402) on fuse (4) and corresponding contact (302) electric connection.
3. A safe and reliable thick film heater as claimed in claim 2, wherein: the contact (302) is a bonding pad, and a pin (402) on the fuse (4) is electrically welded with the contact (302).
4. A safe and reliable thick film heater as claimed in claim 2, wherein: the contact (302) is a jack, and the pin (402) on the fuse (4) is electrically connected with the contact (302) in an inserting mode.
5. A safe and reliable thick film heater as claimed in claim 1, wherein: be equipped with on thick film heating circuit (301) and trigger fusing portion (303), fuse (4) are hugged closely trigger fusing portion (303) to the formula of strideing across.
6. A safe and reliable thick film heater as claimed in claim 1, wherein: fuse (4) are including fusing part (401) of high temperature fusing, fusing part (401) series connection inserts between two thick film heating circuit (301).
7. A safe and reliable thick film heater as claimed in claim 1, wherein: an insulating medium layer (2) is arranged between the heat-conducting substrate (1) and the thick film heating layer (3).
8. A safe and reliable thick film heater as claimed in claim 1, wherein: when the thick film heating circuit (301) is provided with two sections, one end of the thick film heating circuit (301) is electrically connected with a power supply terminal, and the other end of the thick film heating circuit is electrically connected with the corresponding fuse (4); when thick film heating circuit (301) set up more than the three-section, thick film heating circuit (301) one end electric connection power terminal, the corresponding fuse of other end electric connection (4) of beginning and end, corresponding fuse (4) of thick film heating circuit (301) both ends difference electric connection in the middle of.
9. A safe and reliable thick film heater as claimed in any one of claims 1 to 8 wherein: the thick film heating circuit (301) is laid out in an arcuate and/or spiral track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121012554.5U CN214756955U (en) | 2021-05-12 | 2021-05-12 | Safe and reliable's thick film heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121012554.5U CN214756955U (en) | 2021-05-12 | 2021-05-12 | Safe and reliable's thick film heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214756955U true CN214756955U (en) | 2021-11-16 |
Family
ID=78621168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121012554.5U Active CN214756955U (en) | 2021-05-12 | 2021-05-12 | Safe and reliable's thick film heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214756955U (en) |
-
2021
- 2021-05-12 CN CN202121012554.5U patent/CN214756955U/en active Active
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