CN211429537U

CN211429537U - Electric heater

Info

Publication number: CN211429537U
Application number: CN202020430970.6U
Authority: CN
Inventors: 彭卫东; 蒋文斌
Original assignee: Zhongshan Sany Electrical Appliance Co ltd
Current assignee: Zhongshan Sany Electrical Appliance Co ltd
Priority date: 2020-03-28
Filing date: 2020-03-28
Publication date: 2020-09-04
Anticipated expiration: 2030-03-28

Abstract

The utility model relates to an electric heater, it includes at least one heater, the heater is including generating heat core, heat conduction aluminum pipe and fin, its characterized in that: the heating core comprises a first insulation sheet, a second insulation sheet and a third insulation sheet, wherein a resistance wire is wound on the second insulation sheet and the third insulation sheet, the second insulation sheet is located between the first insulation sheet and the third insulation sheet, the first insulation sheet, the second insulation sheet and the third insulation sheet are arranged in an inner cavity of the heat conduction aluminum pipe, the inner wall of the heat conduction aluminum pipe is compressed by the first insulation sheet, the second insulation sheet and the third insulation sheet, connecting terminals are arranged at two ends of the second insulation sheet respectively, and the connecting terminals are respectively exposed out of a port of the heat conduction aluminum pipe. The utility model has the advantages of simple and reasonable structure, the environmental protection.

Description

Electric heater

Technical Field

The utility model relates to a resistance wire heater, especially an electric heater who replaces PTC heater.

Background

PTC heaters are often arranged in electric heating appliances needing hot air blowing, such as household air conditioners, warm air blowers, electric fireplaces, clothes dryers and the like. However, the PTC electric heater has 2-2.5 times of impulse current, and the PTC heating sheet is not environment-friendly.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide an electric heater adopting resistance wires for heating.

The above purpose is realized by the following technical scheme:

the utility model provides an electric heater, includes at least one heater, the heater includes heating core, heat conduction aluminum pipe and fin, its characterized in that: the heating core comprises a first insulation sheet, a second insulation sheet and a third insulation sheet, wherein a resistance wire is wound on the second insulation sheet and the third insulation sheet, the second insulation sheet is located between the first insulation sheet and the third insulation sheet, the first insulation sheet, the second insulation sheet and the third insulation sheet are arranged in an inner cavity of the heat conduction aluminum pipe, the inner wall of the heat conduction aluminum pipe is compressed by the first insulation sheet, the second insulation sheet and the third insulation sheet, connecting terminals are arranged at two ends of the second insulation sheet respectively, and the connecting terminals are respectively exposed out of a port of the heat conduction aluminum pipe.

The technical scheme can be further improved by the following measures:

and heat-conducting silicone grease strips are respectively arranged on two sides of the second insulating sheet and are positioned between the first insulating sheet and the third insulating sheet.

The outer walls of the two sides of the heat-conducting aluminum pipe are respectively provided with a small groove which is concave inwards.

The electric heater comprises two heaters, two supports and a temperature controller, wherein the two heaters are erected between the two supports side by side, and the temperature controller is arranged on one support and is positioned between the two heaters.

The first insulating sheet, the second insulating sheet and the third insulating sheet are mica sheets.

The above technical measures can be used alternatively or in combination as long as they do not conflict with each other.

The utility model has simple and reasonable structure, insulated appearance and appearance similar to a PTC heater, but the heating element is a traditional resistance wire. The utility model discloses the advantage:

1. the surface temperature can be made higher than the PTC. The insulation type PTC electric heater is generally 250 ℃ at most, and the surface temperature of the utility model can reach 300 ℃.

2, the PTC electric heater has 2-2.5 times of impulse current, the utility model is a pure resistance load, without impulse current.

3, the power of the PTC electric heater can be attenuated by about 10 percent after the PTC electric heater works for one year, and the power of the utility model is constant.

4. The utility model discloses it is insulating to lean on the mica sheet, and is more reliable than PTC electric heater's polyimide film.

5 PTC electric heater power is along with the amount of wind, the external condition of temperature changes, the utility model discloses power is invariable.

The PTC heating sheet is not environment-friendly (should be exempted), and the utility model discloses the material environmental protection.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a front view of the embodiment shown in FIG. 1;

FIG. 3 is a top view of the embodiment shown in FIG. 1;

FIG. 4 is an exploded perspective view of the embodiment of FIG. 1;

fig. 5 is a schematic sectional view of a heater according to another embodiment of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

An electric heater as shown in fig. 1-4 comprises two heaters 1, wherein the heaters 1 comprise a heating core 11, a heat-conducting aluminum tube 12 and a heat sink 13. The heating core 11 includes a first insulating sheet 111, a second insulating sheet 112 and a third insulating sheet 113 wound with a resistance wire 114, the second insulating sheet is in the first insulating sheet with between the third insulating sheet, the first insulating sheet, the second insulating sheet and the third insulating sheet are arranged in the inner cavity of the heat conduction aluminum pipe 12, the inner wall of the heat conduction aluminum pipe 12 will the first insulating sheet 111, the second insulating sheet 112 and the third insulating sheet 113 are compressed, the two ends of the second insulating sheet are respectively provided with a connecting terminal 115, the connecting terminal 115 is respectively followed the port of the heat conduction aluminum pipe 12 is exposed.

The two heat generators 1 can be connected in series or in parallel according to the use requirement.

The first, second, and

third insulating sheets

111, 112, and 113 are mica sheets.

The outer walls of the two sides of the heat-conducting aluminum pipe 12 are respectively provided with a small concave groove 121. The heat conductive aluminum pipe 12 is thin-walled and oblong.

The electric heater also comprises two brackets 2 and a temperature controller 3, the two heaters 1 are erected between the two brackets 2 side by side, and the temperature controller 3 is arranged on one bracket 2 and is positioned between the two heaters 1.

In another embodiment shown in fig. 5, two sides of the second insulating sheet 112 are respectively provided with a thermal grease strip 116, and the thermal grease strip 116 is located between the first insulating sheet 111 and the third insulating sheet 113. The heat-conducting silicone grease strip is insulated from the first insulating sheet 111 and the third insulating sheet 113 in a matched mode, and therefore reliability is improved. The heat-conducting aluminum pipe 12 is pressed by an oil press, so that the resistance wire and the insulation sheet are tightly attached to the heat-conducting aluminum pipe 12, and fig. 5 shows the state of each part before pressing and the pressure direction. Other structures of this embodiment refer to the previous embodiment, and are not described herein again.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. Furthermore, the technical features mentioned in the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.

Claims

1. The utility model provides an electric heater, includes at least one heater, the heater includes heating core, heat conduction aluminum pipe and fin, its characterized in that: the heating core comprises a first insulation sheet, a second insulation sheet and a third insulation sheet, wherein a resistance wire is wound on the second insulation sheet and the third insulation sheet, the second insulation sheet is located between the first insulation sheet and the third insulation sheet, the first insulation sheet, the second insulation sheet and the third insulation sheet are arranged in an inner cavity of the heat conduction aluminum pipe, the inner wall of the heat conduction aluminum pipe is compressed by the first insulation sheet, the second insulation sheet and the third insulation sheet, connecting terminals are arranged at two ends of the second insulation sheet respectively, and the connecting terminals are respectively exposed out of a port of the heat conduction aluminum pipe.

2. The electric heater of claim 1, wherein: and heat-conducting silicone grease strips are respectively arranged on two sides of the second insulating sheet and are positioned between the first insulating sheet and the third insulating sheet.

3. The electric heater of claim 1, wherein: the outer walls of the two sides of the heat-conducting aluminum pipe are respectively provided with a small groove which is concave inwards.

4. The electric heater of claim 1, wherein: the electric heater comprises two heaters, two supports and a temperature controller, wherein the two heaters are erected between the two supports side by side, and the temperature controller is arranged on one support and is positioned between the two heaters.

5. The electric heater of claim 1, wherein: the first insulating sheet, the second insulating sheet and the third insulating sheet are mica sheets.