Runner layer structure of PTC electric heating device

An electric heating device and layer structure technology, applied in water heaters, fluid heaters, lighting and heating equipment, etc., can solve the problem of increasing the pressure load of the flow medium pipeline of the power pump in the heating system, reducing the heating power of the PTC heating element, heating Problems such as excessive pressure difference between the inlet and outlet of the device, to avoid excessive local temperature, improve heat transfer effect, and high heat transfer efficiency

CN108534347APending Publication Date: 2018-09-14SHANGHAI FENGTIAN ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-09-14

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Abstract

The invention discloses a runner layer structure of a PTC electric heating device. Medium flow speed can be balanced, cooling is more uniform, too high local temperature is avoided, heat exchange is more sufficient, meanwhile, mounting is convenient, flow resistance is low, and heat exchange efficiency is high. The structure comprises a lower shell, an upper shell and a seal element, at least oneof the lower shell and the upper shell is attached to a PTC heating element, the lower shell or upper shell is provided with a groove used for mounting of the seal element, the lower shell and the upper shell are subject to press fitting through the seal element to form an assembling body with an inlet and an outlet outwards, branch runners composed of an inlet main runner, an outlet main runner and multiple heat exchange fins are arranged in the assembling body, and are in S shapes, the multiple branch runners are in parallel connection so as to enable flowing media in the inlet main runner to be introduced into the outlet main runner, the inlet communicates with the inlet main runner, and the outlet communicates with the outlet main runner.
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Description

technical field

[0001] The invention relates to a component of a PTC electric heating device used for heating a flowing medium, in particular to a flow channel layer structure of a PTC electric heating device. Background technique

[0002] At present, the thermal power of the PTC electric heating device used to heat the flowing medium is greatly restricted by the flow channel, and the structure of the flow channel will affect the overall heat exchange capacity of the device by affecting the flow resistance of the flowing medium. Take the PTC electric heating device used in hybrid vehicles and pure electric vehicles as an example. When the heat exchange capacity of the device is low, the heat emitted by the PTC resistor cannot be taken away by the coolant in time, and the resistance of the PTC resistor will increase. In the case of constant voltage, the heating power of PTC will be greatly reduced, which will affect the product performance and the thermal efficiency of PTC; w...

Examples

Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] combined with figure 1 And attached figure 2 , a flow channel layer structure of a PTC electric heating device, which includes a lower casing 3, an upper casing 4 and a sealing element 8, at least one of the lower casing 3 and the upper casing 4 is attached to a PTC heating element, The lower casing 3 or the upper casing 4 is provided with a groove 20 for installing the sealing element 8, and the lower casing 3 and the upper casing 4 are formed by pressing with the sealing element 8 to form an external opening with only an inlet. 10 and the assembly of the outlet 11; the assembly is provided with an inlet main channel 5, an outlet main channel 6 and a branch flow channel 7 composed of several heat exchange fins 14; the branch flow channel 7 is S-shaped, The several branch flow channels 7 introduce the flow medium in the inlet main channel 5 into the...