Shovel fin ceramic PTC electric heater

Abstract

The invention relates to the field of PTC electric heaters, and in particular to a shovel fin ceramic PTC electric heater. The shovel fin ceramic PTC electric heater comprises a finned aluminum tube and a heating core arranged on the finned aluminum tube, the finned aluminum pipe comprises an aluminum pipe body with a cavity, a first cooling fin and a second cooling fin, wherein the first coolingfin and the second cooling fin are arranged on the upper end face and the lower end face of the aluminum pipe body respectively. The upper and lower sides of the cavity are attached to the upper and lower end faces of the heating core to form an upper and lower end face heat dissipation structure. The left side and the right side of the cavity are laterally pressed and molded by a mold and then are attached to the left and right end surfaces of the heating core to form left and right end surface heat dissipation structures; integrally optimized simple structure, only the structural mold of thealuminum pipe needs to be adjusted, the phenomenon that due to the fact that the pressure of the pressing pipe is not controlled in place, pressure resistance of a product is poor due to the fact that the pressure of the pressing pipe is large and ceramic pieces are broken is avoided through the left and right end face heat dissipation structures, two-face attachment of the aluminum pipe and theheating core is changed into four-face attachment, product heat dissipation performance is improved, and cost is reduced.

Description

technical field [0001] The invention relates to the field of PTC electric heaters, in particular to shovel-fin ceramic PTC electric heaters. Background technique [0002] At present, heat dissipation finned PTC electric heaters are being widely used in air conditioners and other air heating equipment, especially in indoor units of split wall-mounted or cabinet air conditioners. However, due to the structural characteristics of the finned PTC electric heater used at this stage, after the PTC element and the electrode sheet used for conducting electricity are wrapped and inserted into the through hole of the shovel-toothed radiator, it is necessary to separate the heat sinks on both sides of the through hole. Compression, long-term high-temperature use produces stress, which causes the compression force of the finned aluminum tube to the heating core to decrease, and accelerates the power attenuation of the product. At present, the upper and lower sides of the product are pres...

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Problems solved by technology

However, due to the structural characteristics of the finned PTC electric heater used at this stage, after the PTC element and the electrode sheet used for conducting electricity are wrapped and inserted into the through hole of the shovel-toothed radiator, it is necessary to separate the heat sinks on both sides of the through hole. Compression, long-term use under high temperature produces stress, which causes the compression force of the finned aluminum tube to the heating core to decrease, and accelerates the power attenuation of the product. At present, the products are pressed and fitted on the upper and lower sides, and the heat dissipation performance is limited.

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