CN221784370U - A PTC heater - Google Patents

Abstract

The utility model provides a PTC heater, which relates to the technical field of PTC heating components, and comprises a PTC assembly and bases positioned on two sides; the PTC assembly comprises at least one ceramic heating core piece, and a plurality of radiating fins are sleeved on the ceramic heating core piece at equal intervals; one surface of the base, which is close to the PTC assembly, is protruded to form a connecting table, a heat dissipation space is formed between every two adjacent connecting tables, and the number of the connecting tables is the same as that of the ceramic heating core pieces. The utility model has the advantages that the connecting table is formed on one surface of the base close to the PTC assembly in a protruding way, the heat dissipation space is formed between the adjacent connecting tables, the ceramic heating core piece is connected to the connecting tables, the heat dissipation sheet is arranged on the ceramic heating core piece, the design can lead the side surface of the base to be incompletely connected with the heat dissipation sheet in a close way, only the connecting tables are close to each other, and the rest parts are kept at a certain distance.

Description

PTC heater

Technical Field

The utility model relates to the technical field of PTC heating components, in particular to a PTC heater.

Background

PTC is an abbreviation for Positive Temperature Coefficient, meaning a positive temperature coefficient, generally referring to semiconductor materials or components with a very large positive temperature coefficient. The PTC heating core is composed of PTC ceramic heating elements and aluminum tubes. The PTC heater has the advantages of small thermal resistance and high heat exchange efficiency, and is an automatic constant-temperature and electricity-saving electric heater. The PTC heating core is generally composed of a heating ceramic plate, an electrode plate, an alumina substrate, an insulating film and an aluminum tube; the PTC heater is widely applied to hair straighteners, current combs, mosquito repellers, hot melt adhesive guns, laminator, hair curlers and the like, and has quite wide application range. The PTC heater is a heating element piece designed by utilizing the constant temperature heating characteristic of the constant temperature heating PTC thermistor, and in the occasion of medium and small power heating, the PTC heating element has the advantages of constant temperature heating, no open fire, high heat conversion rate, little influence by power supply voltage, long natural service life and the like which are incomparable with the traditional heating element, and the PTC heating element is increasingly popular with research and development engineers in application in electric heating appliances.

Therefore, the prior art has improved PTC heater, and the Chinese patent (patent name: intelligent temperature-adjusting PTC heater special for fresh air system, patent number: 201721367917.0) discloses that: "including left support, right support and PTC assembly, PTC assembly both ends pass through fixed screw fixed connection left support and right support respectively, PTC assembly parallel arrangement is between left support and right support, sets up aluminium fin between two adjacent PTC assemblies, the surface of the right bracket is fixedly provided with a comprehensive treatment piece and a temperature control chip, the comprehensive treatment piece and the temperature control chip are respectively connected with a fuse, and the PTC assembly is also connected with an outgoing line; in addition, the adopted outgoing line has the performances of high temperature resistance and fire resistance, and the safety performance of the PTC heating element is further improved.

However, the above-mentioned drawbacks are that, as seen in fig. 1 of the patent, the surfaces of the left bracket and the right bracket, which are close to the aluminum fins in the PTC assembly, are flat, and the surfaces are closely connected with the aluminum fins, which is not beneficial to the heat dissipation of the aluminum fins, and can cause local overhigh temperature, thus not only having potential safety hazard, but also affecting the life and performance of the product. Based on this, it is necessary to develop a novel PTC heater to overcome the above problems.

Disclosure of utility model

The PTC heater provided by the utility model overcomes the defects in the prior art, is provided with a radiating space, is beneficial to radiating heat, reduces potential safety hazards and is ingenious in structure.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

A PTC heater comprises a PTC assembly and bases positioned on two sides; the PTC assembly comprises at least one ceramic heating core piece, and a plurality of radiating fins are sleeved on the ceramic heating core piece at equal intervals; one surface of the base, which is close to the PTC assembly, is protruded to form a connecting table, a heat dissipation space is formed between every two adjacent connecting tables, and the number of the connecting tables is the same as that of the ceramic heating core pieces and corresponds to the ceramic heating core pieces one by one.

Further, the base comprises a base body and a side cover, and the connecting table is positioned on the base body; the ceramic heating core piece comprises a connecting lug, a mounting hole for the ceramic heating core piece to be inserted is formed in the connecting table, a connecting lug inserting hole is formed in the base body, and the mounting hole is correspondingly communicated with the connecting lug inserting hole.

Furthermore, each lug is provided with a copper piece connecting piece beside the corresponding lug inserting hole, the copper piece connecting piece is provided with an internal threaded hole, a copper guide plate is further arranged in the base body, and the copper guide plate is provided with perforations which are in one-to-one correspondence with the copper piece connecting pieces.

Still further, the PTC assembly is provided with a support rod of hollow design, the base is provided with a rod hole, and the support rod is inserted and installed in the rod hole; the matrix is provided with a plurality of reinforcing ribs.

Further, the radiating fin comprises a plate surface, tail plates are arranged on two sides of the plate surface, and the tail plates are vertically arranged on the plate surface; when the radiating fins are arranged on the ceramic heating core piece, the tail plates corresponding to the adjacent radiating fins are correspondingly connected.

Furthermore, the board surface is equidistantly provided with core piece holes, the front end edge of each core piece hole forms a cambered surface shape, the rear end edge of each core piece hole forms an annular surrounding ring, and the inner surface of each surrounding ring is flat.

Further, the ceramic heating core piece comprises a positive electrode plate, a negative electrode plate, a heating ceramic plate, an insulating ceramic plate, insulating paper and an aluminum pipe, and the lugs are positioned at the end parts of the positive electrode plate and the negative electrode plate; the heating ceramic plates and the insulating ceramic plates are arranged between the positive electrode plates and the negative electrode plates, and are horizontally laid along the length directions of the positive electrode plates and the negative electrode plates.

Still further, a conductive glue layer is arranged between the positive electrode plate and the heating ceramic plate and between the negative electrode plate and the heating ceramic plate as well as between the negative electrode plate and the insulating ceramic plate.

Further, the base body comprises a fixing plate, the lower surface of the fixing plate is flat, and elliptical holes are formed in the fixing plate.

Compared with the prior art, the utility model has the beneficial effects that:

The heat dissipation device has the advantages that the connecting table is formed on the base in a protruding mode, a heat dissipation space is formed between every two adjacent connecting tables, the ceramic heating core piece is connected to the connecting table, the radiating fin is arranged on the ceramic heating core piece, the side face of the base can be incompletely connected with the radiating fin in a near mode through the design, only the connecting table is close to, a certain distance is kept between other parts, heat dissipation of the radiating fin is facilitated, potential safety hazards are reduced, the structure is ingenious, and the service performance of a product is improved.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, in which:

Fig. 1 is a perspective view of a PTC heater;

fig. 2 is a second perspective view of the PTC heater;

Fig. 3 is a schematic view of a separated state of the base and the PTC assembly;

FIG. 4 is a schematic view showing a tab inserted into a tab insertion hole and bent;

Fig. 5 is a schematic view showing a state in which the base body is separated from the side cover;

FIG. 6 is a perspective view of a heat sink;

FIG. 7 is a second perspective view of a heat sink;

fig. 8 is an exploded view of a ceramic heat generating core member.

In the figure:

1. A PTC assembly;

2. A base; 201. a base; 2011. a connection station; 20111. a mounting hole; 2012. a heat dissipation space; 2013. a lug insertion hole; 2014. a copper piece connection; 2015. a copper guide plate; 2016. a rod hole; 2017. reinforcing ribs; 2018. a fixing plate; 202. a side cover;

3. a ceramic heating core; 301. a positive electrode plate; 302. a negative electrode plate; 303. a heat-generating ceramic sheet; 304. an insulating ceramic sheet; 305. insulating paper; 306. an aluminum pipe; 307. a lug;

4. a heat sink; 401. a plate surface; 4011. a core hole; 40111. a surrounding ring; 402. a tail plate;

5. And (5) supporting the rod.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Example 1

As shown in fig. 1 to 7, a PTC heater includes a PTC assembly 1 and a base 2 at both sides; the PTC assembly 1 is fixed on a base 2, and the base 2 is used for fixing the whole PTC heater on an external machine; the PTC assembly 1 comprises at least one ceramic heating core member 3, wherein a plurality of heat dissipation fins 4 are equidistantly sleeved on the ceramic heating core member 3, in this embodiment, the number of the ceramic heating core members 3 is three, and after the ceramic heating core member 3 is electrified, heat is generated, and the heat is transferred to the heat dissipation fins 4 and finally released to the outside; a distance is maintained between adjacent heat sinks 4 for heat dissipation.

The utility model is characterized in that a connecting table 2011 is formed on one surface of the base 2 close to the PTC assembly 1 in a protruding way, a heat dissipation space 2012 is formed between adjacent connecting tables 2011, the number of the connecting tables 2011 is the same as that of the ceramic heating core pieces 3, the ceramic heating core pieces 3 are in one-to-one correspondence with the ceramic heating core pieces, and the ceramic heating core pieces 3 are inserted into and connected with the connecting tables 2011. The side surface of the base 2 is not completely connected with the radiating fins 4 in a near way by the protruding connecting table 2011, and only the connecting table 2011 is close to the radiating fins 4, so that heat of the radiating fins 4 at the part can be released from the radiating space 2012, the using effect of a product is improved, and potential safety hazards are reduced.

The base 2 comprises a base 201 and a side cover 202, the side cover 202 is fixed on the base 201 through screws, the base 201 comprises a fixing plate 2018, the lower surface of the fixing plate 2018 is smooth, an elliptical hole is formed in the fixing plate 2018, when the side cover 202 is connected with the base 201 into a whole, the side cover 202 is fixed on an external machine through screwing bolts into the elliptical hole, and the design of the elliptical hole is favorable for fine adjustment and then screwing.

The connecting table 2011 is positioned on the base 201, the ceramic heating core 3 comprises the lugs 307, the connecting table 2011 is provided with mounting holes 20111 for inserting the ceramic heating core 3, the base 201 is internally provided with lug inserting holes 2013, the mounting holes 20111 are correspondingly communicated with the lug inserting holes 2013, namely, when the ceramic heating core 3 is fixed with the base 201, the ceramic heating core 3 is inserted into the mounting holes 20111, at the moment, the lugs 307 are inserted into the lug inserting holes 2013, copper piece connecting pieces 2014 are correspondingly arranged beside each lug inserting hole 2013, the copper piece connecting pieces 2014 are provided with internal threaded holes, copper guide plates 2015 are further arranged in the base 201, and the through holes are in one-to-one correspondence with the copper piece connecting pieces 2014; the effect of the structure is that, as seen in fig. 3 to 5, when the tab 307 is inserted into the tab insertion hole 2013 and bent, as shown in fig. 4, the tab 307 is also provided with a through hole, in fig. 4, the through hole of the tab 307 overlaps with the internal threaded hole of the copper part connecting piece 2014, and then a screw passes through the through hole of the copper guide plate 2015 and is screwed into the internal thread of the copper part connecting piece 2014, on one hand, the tab 307 is locked, on the other hand, all the tab 307 is conducted through the copper guide plate 2015, at this time, only the copper guide plate 2015 is required to be connected with a power line, and finally all the tab 307 positioned in the base 2 can be connected after the power line is electrified, without connecting each tab 307 with a power line individually, so that the structure is ingenious. The copper piece connecting piece 2014 and the copper guide plate 2015 are made of copper materials, and the conductive effect is good.

The PTC assembly 1 is provided with the support rod 5 with a hollow design, the base 2 is provided with the rod hole 2016, the support rod 5 is inserted and installed in the rod hole 2016, and the support rod 5 is arranged, so that on one hand, the structural strength of the whole PTC heater can be enhanced, and on the other hand, a power line can be wired from the base 2 on one side to the base 2 on the other side along the hollow part of the support rod 5, and a good hiding effect is achieved; the base 201 is provided with a plurality of reinforcing ribs 2017, and the reinforcing ribs 2017 are used for enhancing the pressure bearing property of the base 201.

As shown in fig. 3, 6 and 7, the heat sink 4 includes a plate 401, tail plates 402 are disposed on two sides of the plate 401, and the tail plates 402 are vertically disposed on the plate 401, when the heat sink 4 is mounted on the ceramic heat-generating core 3, the tail plates 402 corresponding to adjacent heat sinks 4 are correspondingly connected, so that the structure is compact and not loose, that is, the tail plates 402 are abutted against each other.

The plate surface 401 is provided with core holes 4011 at equal intervals, the front end edge of the core holes 4011 is formed into an arc surface shape, the rear end edge of the core holes 4011 is formed into an annular surrounding ring 40111, and the inner surface of the surrounding ring 40111 is flat; the ceramic heating core 3 is inserted from the front end of the core hole 4011, and the front end edge of the core hole 4011 forms a cambered surface shape, which is beneficial to smooth insertion of the ceramic heating core 3, and the inner surface of the surrounding ring 40111 is flat, which can enhance the stability of surface contact with the ceramic heating core 3, i.e. the radiating fin 4 can not shake relative to the ceramic heating core 3, the connection is tight, and the heat conduction is also beneficial.

Example two

As shown in fig. 1 to 8, the second embodiment further discloses: the ceramic heat-generating core member 3 includes a positive electrode plate 301, a negative electrode plate 302, a heat-generating ceramic sheet 303, an insulating ceramic sheet 304, insulating paper 305, and an aluminum pipe 306, and tabs 307 are located at the ends of the positive electrode plate 301 and the negative electrode plate 302; the heating ceramic sheet 303 and the insulating ceramic sheet 304 are arranged between the positive electrode plate 301 and the negative electrode plate 302, and the heating ceramic sheet 303 and the insulating ceramic sheet 304 are horizontally arranged along the length direction of the positive electrode plate 301 and the negative electrode plate 302; the heating ceramic plate 303 is a PTC heating element, the insulating ceramic plate 304 may be made of silicon oxide and aluminum oxide as main components, the positive electrode plate 301 and the negative electrode plate 302 can heat the heating ceramic plate 303 after being electrified, and the insulating ceramic plate 304 does not heat, so that the number of the heating ceramic plate 303 and the insulating ceramic plate 304 can be reasonably arranged according to the required power of the actually produced heater, and if the number of the heating ceramic plate 303 is large and the number of the insulating ceramic plate 304 is small, the power is large; on the contrary, if the number of the heating ceramic plates 303 is small and the number of the insulating ceramic plates 304 is large, the power is small, the flexibility is high, and the production of the heaters with different power is facilitated.

Conductive glue layers are arranged between the positive electrode plate 301 and the heating ceramic plate 303 and between the negative electrode plate 302 and the insulating ceramic plate 304, the conductive glue layers can enhance the connection strength between the heating ceramic plate 303 and the insulating ceramic plate 304 and between the positive electrode plate 301 and the negative electrode plate 302, separation and loosening are not easy to occur, and the stability of products is improved.

Finally, it should be noted that: although the present utility model has been described in detail with reference to the embodiments, it should be understood that the utility model is not limited to the preferred embodiments, but is capable of modification and equivalents to some of the features described in the foregoing embodiments, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (9)

1. A PTC heater is characterized by comprising a PTC assembly and bases positioned on two sides; the PTC assembly comprises at least one ceramic heating core piece, and a plurality of radiating fins are sleeved on the ceramic heating core piece at equal intervals; one surface of the base, which is close to the PTC assembly, is protruded to form a connecting table, a heat dissipation space is formed between every two adjacent connecting tables, and the number of the connecting tables is the same as that of the ceramic heating core pieces and corresponds to the ceramic heating core pieces one by one.

2. A PTC heater according to claim 1, wherein the base comprises a base body and side covers, and the connection table is disposed on the base body; the ceramic heating core piece comprises a connecting lug, a mounting hole for the ceramic heating core piece to be inserted is formed in the connecting table, a connecting lug inserting hole is formed in the base body, and the mounting hole is correspondingly communicated with the connecting lug inserting hole.

3. A PTC heater according to claim 2, wherein each of the lug insertion holes is provided with a copper member connecting member having an internally threaded hole, and wherein the base body is provided with a copper guide plate having perforations therein in one-to-one correspondence with the copper member connecting members.

4. A PTC heater according to claim 1, wherein the PTC assembly is provided with a support rod of hollow design, the base is provided with a rod hole, and the support rod is inserted into and mounted in the rod hole; the matrix is provided with a plurality of reinforcing ribs.

5. A PTC heater according to any one of claims 1 to 4, wherein the heat sink comprises a plate surface, and tail plates are provided on both sides of the plate surface, the tail plates being vertically provided on the plate surface; when the radiating fins are arranged on the ceramic heating core piece, the tail plates corresponding to the adjacent radiating fins are correspondingly connected.

6. A PTC heater according to claim 5, wherein the plate surfaces are provided with core holes at equal intervals, the front end edges of the core holes are formed in a cambered surface shape, the rear end edges of the core holes are formed in an annular surrounding ring, and the inner surfaces of the surrounding rings are flat.

7. A PTC heater according to claim 6 wherein the ceramic heat generating core member comprises a positive electrode plate, a negative electrode plate, a heat generating ceramic sheet, an insulating ceramic sheet, insulating paper and an aluminum tube; the lug is positioned at the end part of the positive electrode plate and the negative electrode plate; the heating ceramic plates and the insulating ceramic plates are arranged between the positive electrode plates and the negative electrode plates, and are horizontally laid along the length directions of the positive electrode plates and the negative electrode plates.

8. A PTC heater according to claim 7 wherein conductive glue layers are provided between the positive electrode plate and the heat-generating ceramic sheet and between the negative electrode plate and the heat-generating ceramic sheet.

9. A PTC heater according to claim 2, wherein the base comprises a fixing plate having a flat lower surface, and elliptical holes are provided in the fixing plate.