CN213586342U

CN213586342U - Electric heating device and PTC heater thereof

Info

Publication number: CN213586342U
Application number: CN202022760164.8U
Authority: CN
Inventors: 张翔; 张广军; 马富勇; 徐庆斌; 张广全
Original assignee: Shenzhen Shanyuan Electronic Corp
Current assignee: Shenzhen Shanyuan Electronic Corp
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-06-29
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses an electric heating device and a PTC heater thereof, which comprises a heat dissipation base aluminum pipe, a first base, a second base, a protector and a PTC heating component; the PTC heating assembly is arranged in the cavity of the heat dissipation base body and is tightly attached to the inner wall of the heat dissipation surface of the heat dissipation base body; the two ends of the heat dissipation base body are respectively a first mounting end and a second mounting end; the connecting terminals of the positive and negative electrodes extend out of the heat dissipation base body and the first base; the PTC heater comprises a base, a protector and a PTC heater, wherein the base is provided with an opening cavity used for accommodating the protector, the opening part of the opening cavity is provided with a limiting component capable of limiting the protector, the protector is arranged in the opening cavity, the protector of the PTC heater can be stably and reliably connected to the base under the long-term working condition, the protection capability cannot be reduced, and the quality and the safety of the PTC heater can be ensured not to be influenced.

Description

Electric heating device and PTC heater thereof

Technical Field

The utility model relates to an electric heater unit technical field especially relates to a PTC heater for electric heater unit.

Background

Due to the unique characteristics of the PTC (Positive Temperature Coefficient) heater, the PTC heater has the characteristics of automatic constant Temperature, no open fire, long service life, small influence of power supply voltage fluctuation, high electric heat conversion rate and the like, and is widely applied to the industries of electric appliances such as fan heaters, clothes dryers, water heaters, air conditioners and the like.

The heat dissipation base aluminum pipe and the protector of the existing PTC heater are fixed by silica gel, and the aluminum pipe and the base are also fixed by the silica gel, so that the PTC heater inevitably has the phenomena of silica gel aging and reduced adhesive property under the long-term working condition, and generates peculiar smell and white powder blowing, thereby causing the problems of instability of heater fixation and reduced protection capability of a protector, and bringing inconvenience and worry about quality to users.

The above background disclosure is only for the purpose of assisting in understanding the inventive concepts and technical solutions of the present application and does not necessarily pertain to the prior art of the present application, and should not be used to assess the novelty and inventive step of the present application in the absence of explicit evidence to suggest that such matter has been disclosed at the filing date of the present application.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a PTC heater, which comprises a heat dissipation base aluminum pipe, a first base, a second base, a protector and a PTC heating assembly, wherein the PTC heating assembly comprises a PTC heating element, a positive electrode, a negative electrode and an insulating layer; the PTC heating assembly is arranged in the heat dissipation base aluminum pipe and is tightly attached to the inner wall of the heat dissipation surface of the heat dissipation base aluminum pipe; the outer side of the radiating surface of the radiating base aluminum pipe is provided with an integrated radiating fin, two ends of the radiating base aluminum pipe are respectively a first mounting end and a second mounting end, and the first mounting end and the second mounting end are respectively inserted and mounted on the first base and the second base; the connecting terminals of the positive and negative electrodes extend out of the heat dissipation substrate aluminum pipe and the first base; the protector is characterized in that an opening cavity used for accommodating the protector is formed in the first base, the protector is arranged in the opening cavity, and a limiting part capable of limiting the protector is arranged at the opening of the opening cavity.

The utility model discloses still provide following alternative:

the first base is made of plastic materials in an injection molding mode, the number of the opening cavities is two, and the two opening cavities are integrally formed on the outer sides of the upper surface and the lower surface of the first base respectively, or are integrally formed on the outer side of the upper surface of the first base, or are integrally formed on the outer side of the lower surface of the first base.

The bottom wall of the opening cavity is a slope wall face convenient for the protector to be inserted, the protector is attached to the bottom wall of the opening cavity after being inserted into the opening cavity, and is limited in the cavity of the opening cavity by the limiting component.

The first base is provided with a first mounting groove, the second base is provided with a second mounting groove, the shape of the first mounting groove is matched with the external shape of the first mounting end, the shape of the second mounting groove is matched with the external shape of the second mounting end, the first mounting end is in close fit with the first mounting groove, and the second mounting end is in close fit with the second mounting groove.

The first base with still adopt holding screw to fix between the first installation end, the second base with still adopt holding screw to fix between the second installation end.

The first base and the second base are respectively provided with a first fixed connecting part and a second fixed connecting part in advance, and the first fixed connecting part is arranged at the outer end part of the first base and is in a column shape extending outwards along the length direction of the PTC heater.

The second fixed connecting part is a boss structure arranged at the top or the middle part of the second base, an embedded nut is arranged in the boss structure, and the axial direction of the embedded nut is along the length direction of the PTC heater.

The limiting parts are two or more and are arranged at the mouth part of the opening cavity in parallel at preset intervals or in a uniform arrangement mode.

The utility model also provides an electric heating device, including electric heating device body and heating element thereof, heating element includes at least one PTC heater as in any one of the foregoing.

Alternatively, the PTC heater is connected to the electric heating apparatus body through the first and second fixing connection parts.

Compared with the prior art, the beneficial effects at least comprise:

through be equipped with on the first base and be used for holding the opening cavity and the spacing part of protector can guarantee that the PTC heater is under long-term operating condition the protector still can connect on the base reliably and steadily, and protective capacities can not descend to can guarantee that the quality and the security of PTC heater are not influenced.

Drawings

Fig. 1 is a schematic perspective view of a PTC heater according to an embodiment;

FIG. 2 is an exploded view of the PTC heater of FIG. 1;

fig. 3 is a schematic perspective view of a first base according to an embodiment (two open cavities are respectively arranged on the outer sides of the upper and lower surfaces of the first base, and 1 limiting component is respectively arranged at the mouth of each open cavity).

Fig. 4 is an exploded view of a second base structure of one embodiment (second stationary attachment component and insert nut on top of the second base).

Fig. 5 is an exploded view of a second base structure according to another embodiment (the second fixing and connecting member and the insert nut are in the middle of the second base).

Fig. 6 is a schematic perspective view of a first base according to another embodiment (two open cavities respectively on the outer sides of the upper and lower surfaces of the first base, and 2 stoppers are provided at the mouth of each open cavity)).

Fig. 7 is a schematic perspective view of a first base according to yet another embodiment (two open cavities are both outside the upper surface of the first base, and 1 limiting component is provided at the mouth of one open cavity and 2 limiting components are provided at the mouth of the other open cavity).

Fig. 8 is a perspective view of another embodiment of a PTC heater.

Fig. 9 is a perspective view of a PTC heater according to still another embodiment.

Detailed Description

Preferred embodiments of the present invention will be described in further detail with reference to fig. 1 to 9.

Description/definition of related art terms:

the heat dissipation substrate aluminum pipe refers to a tubular heat dissipation substrate made of aluminum or aluminum alloy, and the inside of the pipe is used for accommodating the PTC heating component.

The heat dissipation surface refers to two wide wall surfaces which are tightly attached to the PTC heating assembly in the heat dissipation substrate aluminum pipe so as to better transfer heat, and generally, heat dissipation fins are arranged on the outer side of the heat dissipation surface.

The bottom wall and the top wall in the present application are relative concepts and are not distinguished from each other on the basis of the upper and lower portions in the drawings.

Example one

As shown in fig. 1 and 2, the PTC heater of the present embodiment includes: a heat-dissipating base aluminum pipe 8, first and

second bases

1 and 7, protectors (2, 5), and a PTC heat-generating component. The PTC heating assembly comprises a PTC heating element 11, positive and negative electrodes (31, 32) and an insulating layer 9; the PTC heating assembly is arranged in the heat dissipation substrate aluminum pipe 8 and is tightly attached to the inner wall of the heat dissipation surface of the heat dissipation substrate aluminum pipe 8. The outer side of the heat dissipation surface of the heat dissipation substrate aluminum pipe 8 is provided with an integrated heat dissipation fin, two ends of the heat dissipation substrate aluminum pipe 8 are respectively a first installation end and a second installation end, and the first installation end and the second installation end are respectively installed on the first base 1 and the second base 7; the connecting terminals of the positive and negative electrodes (31, 32) extend out of the heat dissipation substrate aluminum pipe 8 and the first base 1.

As shown in fig. 3, an opening cavity 101 for accommodating the protectors (2, 5) is formed in the first base 1, a limiting component 102 capable of limiting the protectors (2, 5) is arranged at the opening of the opening cavity 101, the protectors (2, 5) are arranged in the opening cavity 101, and connecting terminals of the protectors (2, 5) extend out of the opening cavity 101. Two opening cavities 101 are respectively arranged at the outer sides of the upper surface and the lower surface of the

first base

1, and 1 limiting part 102 is respectively arranged at the opening part of each opening cavity 101. In addition, the first base 1 is formed by injection molding of a plastic material, and the number of the open cavities 101 is two, and the two open cavities are respectively and integrally formed on the outer sides of the upper surface and the lower surface of the first base 1.

As shown in fig. 1 and 2, the first base is provided with a first mounting groove 1, the second base 7 is provided with a second mounting groove, the shape of the first mounting groove is matched with the external shape of the first mounting end, the shape of the second mounting groove is matched with the external shape of the second mounting end, the first mounting end is in close fit with the first mounting groove, and the second mounting end is in close fit with the second mounting groove. The first base 1 and the first mounting end can be further fixed by a set screw 4, and the second base 7 and the second mounting end can be further fixed by a set screw 6. In fig. 1, the set screw 4 and the set screw 6 are fixed on the same side of the PTC heater, but those skilled in the art will understand that different side fixing is possible, and the technical effect of firm fixing can also be achieved.

As shown in fig. 3 and 4, a first fixing and connecting member 103 and a second fixing and connecting member 703 are respectively preset on the first base 1 and the second base 7, and the first fixing and connecting member 103 is provided at an outer end of the first base 1 and has a column shape extending outward in a longitudinal direction of the PTC heater. The second fixing and connecting member 703 is a boss structure provided on the top of the second base 7, and an insert nut 705 is further provided in the boss structure, and the axial direction of the insert nut 705 is along the length direction of the PTC heater.

The protectors (2, 5) can be temperature control switches, overvoltage protectors or overcurrent protectors and the like, are connected in a circuit and can be disconnected when overtemperature or voltage or current is abnormal, and therefore the safety protection effect is achieved.

In this embodiment, it is preferable that the bottom wall of the open cavity 101 is an inclined wall surface for facilitating insertion of the protectors (2, 5), and the protectors (2, 5) are attached to the bottom wall of the open cavity 101 after being inserted into the open cavity 101 and are limited in the cavity of the open cavity 101 by the limiting member 102.

In addition, the second base 7 may also adopt a structure as shown in fig. 5, and the main difference from the structure shown in fig. 4 is that the second fixing and connecting part 703 in fig. 5 is provided at the middle of the second base 7, and the second fixing and connecting part 703 in fig. 4 is provided at the top of the second base 7. The two structures have different aspect ratios and are each suitable for different installation environments.

Example two

As shown in fig. 6, the difference between the present embodiment and the first embodiment is that two of the stoppers 102 are provided at the mouth of the two open cavities 101, respectively, and are arranged in parallel. The mouth part of the opening cavity 101 can be uniformly arranged at intervals, and proper intervals can be preset according to the size and the structural condition of the protectors (2 and 5).

It is understood by those skilled in the art that two open cavities 101 may be provided on the outer side of the upper or lower surface of the first base 1, and the object of the present invention can be achieved.

EXAMPLE III

As shown in fig. 7, the difference from the first embodiment is that two open cavities 101 are provided, and are arranged in parallel outside the upper surface of the first base 1, one of the stoppers 102 is provided at the mouth of one of the open cavities 101, and two of the stoppers 102 are provided in parallel at the mouth of the other open cavity 101, so that the protectors (2, 5) are always restricted from loosening.

Example four

As shown in fig. 8, an electric heating device comprises an electric heating device body and a heating assembly thereof, wherein the heating assembly comprises at least one PTC heater according to any one of the embodiments.

Alternatively, the PTC heater is connected to the electric heating apparatus body through the first fixing connection member 103 and the second fixing connection member 703.

EXAMPLE five

As shown in fig. 9, an electric heating apparatus differs from the fourth embodiment in that the open cavity 101 of the PTC heater is disposed at a position different from that of the first base 1 in the present embodiment, and is disposed at an outer side of the lower surface of the first base 1 in the fourth embodiment. In addition, the present embodiment employs the second base 7 as shown in fig. 5, and the fourth embodiment employs the second base 7 as shown in fig. 4.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the technical field of the utility model belongs to the prerequisite of not deviating from the utility model discloses, can also make a plurality of equal substitution or obvious variants, performance or usage are the same moreover, all should regard as belonging to the utility model's scope of protection.

Claims

1. A PTC heater is characterized by comprising a heat dissipation base aluminum pipe, a first base, a second base, a protector and a PTC heating assembly, wherein the PTC heating assembly comprises a PTC heating element, a positive electrode, a negative electrode and an insulating layer;

the PTC heating assembly is arranged in the heat dissipation base aluminum pipe and is tightly attached to the inner wall of the heat dissipation surface of the heat dissipation base aluminum pipe;

the outer side of the radiating surface of the radiating base aluminum pipe is provided with an integrated radiating fin, two ends of the radiating base aluminum pipe are respectively a first mounting end and a second mounting end, and the first mounting end and the second mounting end are respectively inserted and mounted on the first base and the second base;

the connecting terminals of the positive and negative electrodes extend out of the heat dissipation substrate aluminum pipe and the first base;

the protector is characterized in that an opening cavity used for accommodating the protector is formed in the first base, the protector is arranged in the opening cavity, and a limiting part capable of limiting the protector is arranged at the opening of the opening cavity.

2. A PTC heater according to claim 1, wherein the first base is injection molded from a plastic material, and the number of the open cavities is two, and the two open cavities are integrally formed on the outer sides of the upper and lower surfaces of the first base, respectively, or are integrally formed on the outer side of the upper surface of the first base, or are integrally formed on the outer side of the lower surface of the first base.

3. The PTC heater according to claim 2, wherein a bottom wall of the open cavity is an inclined wall surface for facilitating insertion of the protector, and the protector is attached to the bottom wall of the open cavity after being inserted into the open cavity and is restricted in the cavity of the open cavity by the restricting member.

4. The PTC heater according to claim 1, wherein the first base is provided with a first mounting groove, the second base is provided with a second mounting groove, the first mounting groove has a shape matching an outer shape of the first mounting end, the second mounting groove has a shape matching an outer shape of the second mounting end, the first mounting end is in close-fitting relation with the first mounting groove, and the second mounting end is in close-fitting relation with the second mounting groove.

5. A PTC heater according to claim 1, wherein the first base and the first mounting end are further secured by a set screw, and the second base and the second mounting end are further secured by a set screw.

6. A PTC heater according to claim 1, wherein the first and second bases are further provided with first and second fixing connection parts, respectively, the first fixing connection part being provided at an outer end of the first base and having a cylindrical shape extending outward in a length direction of the PTC heater.

7. The PTC heater according to claim 6, wherein the second fixing connection member is a boss structure provided at the top or the middle of the second base, and an insert nut is provided in the boss structure, and an axial direction of the insert nut is along a length direction of the PTC heater.

8. A PTC heater according to any of claims 1-7, wherein the two or more position limiting members are juxtaposed at the mouth of the open cavity at predetermined intervals or in a uniform arrangement.

9. An electric heating device comprising an electric heating device body and a heating assembly therefor, said heating assembly comprising at least one PTC heater according to any one of claims 1-8.

10. An electric heating device comprising an electric heating device body and a heating assembly thereof, said heating assembly comprising at least one PTC heater according to claim 6 or 7;

the PTC heater is connected to the electric heating apparatus body through the first and second fixing connection parts.

11. The electric heating apparatus according to claim 10, wherein the two or more restricting members are juxtaposed at the mouth of the open chamber at a predetermined interval or in a uniform arrangement.