PTC electric heater

Abstract

The invention relates to a PTC electric heater, and relates to the technical field of heaters. The PTC electric heater comprises an upper cover, a control box, a dielectric box and a lower cover arranged successively from top to bottom. The upper cover and control box are encircled to form a control cavity, and a control assembly is arranged in the control cavity; the top and bottom of the dielectric box are provided with openings respectively, the middle of the dielectric box is provided with a separator plate, a dielectric cavity is formed between the separator plate and the control box, a heating cavity is formed between the lower cover and the separator plate, and a heating assembly is arranged in the heating cavity; projections arranged side by side are formed in the separator plate towards the dielectric cavity, flow channels are formed between the projections as well as between the sidewall of the dielectric box and the projections, and first ribs are formed on the projections and/or the sidewalls in the two sides of the flow channel. Via simple structural layout, the control assembly is separated from the heating assembly by the dielectric cavity, the first ribs are arranged to increase turbulent flow in the flow channels, a medium flowing in the dielectric cavity takes heat away continuously, and thus, the temperature of the control assembly approaches that of the medium in the dielectric cavity.

Description

technical field [0001] The present application relates to the technical field of heaters, in particular to a PTC electric heater. Background technique [0002] PTC (Positive Temperature Coefficient) heater is a PTC heater. Because PTC heaters have the characteristics of fast start-up speed, good temperature control, ideal work reliability, energy saving and long service life, they are widely used in the manufacture of various electric heating appliances such as air conditioners, heaters, clothes dryers, dishwashing machines, etc. appliances, water heaters, food processors, heated floor cleaners, etc., and even as control and protection devices such as current limiters, filter protectors, overload protectors, demagnetization controllers, start controllers, etc. important parts. At this stage, PTC heaters are often configured on new energy electric vehicles for battery thermal management and air conditioning heating. [0003] The PTC electric heater in the prior art cannot ...

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Problems solved by technology

[0003] The PTC electric heater in the prior art cannot effectively reduce the surface temperature of the circuit board and other structures during use. The circuit control board is placed in a high-temperature environment for a long time, and the life of the electronic components is greatly shortened or even fails, which reduces the temperature of the PTC electric heating. The product life and validity period of the device

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