Over-temperature protection type heating chip for flooring board

Abstract

The invention discloses an over-temperature protection type heating chip for a flooring board, and particularly relates to the technical field of ground laying appliances. The over-temperature protection type heating chip comprises a heating chip body (1), PET (Polyethylene Terephthalate) protection layers (2), a PTC (Positive Temperature Coefficient) variable resistance layer (3), supporting current-carrying bars (4) and main current-carrying bodies (5), wherein the PET protection layers (2) are arranged at the bottom end of the heating chip body (1); the PTC variable resistance layer (3) is arranged at the upper end of the PET protection layer (2); the supporting current-carrying bars (4) are embedded in the PTC variable resistance layer (3) in a staggered manner; the main current-carrying bodies (5) are arranged on the left side and the right side of the PTC variable resistance layer (3); the PET protection layers (2) are arranged at the upper ends of the main current-carrying bodies (5). The over-temperature protection type heating chip is high in safety, and the point-by-point temperature control effect of the over-temperature protection type heating chip can be achieved; with the local protecting function for an overheated part, the influence on the power of a non-overheat area is avoided, high speed in temperature rise, environment protection and energy conservation are realized, and power consumption is optimized; the process is simple, so that the over-temperature protection type heating chip is suitable for batch scale production; the design of a temperature controller is greatly simplified, and hardware cost for accurate over-temperature protection is reduced.

Description

Technical field: [0001] The invention relates to the technical field of floor laying appliances, in particular to an over-temperature protection type heating floor chip. Background technique: [0002] At present, there are the following types of self-limiting temperature floors on the market: the first is a floor that is protected by self-limiting temperature through a bimetallic temperature control switch. This type of floor protects local overheated areas through dispersed built-in or external bimetallic temperature control switches; the second type uses ordinary PTC heating elements as self-limiting temperature floors. This type of floor uses a heating element with a PTC effect to obtain a limited PTC effect. [0003] For the first implementation scheme on the market, there are mainly the following shortcomings: the effect of over-temperature detection is affected by the number and location of the temperature detection points. The low density of detection points leads t...

AI Technical Summary

Problems solved by technology

The low density of detection points leads to an excessively large detection circle, which leads to low detection sensitivity and, in extreme cases, detection failure; high density of detection points directly increases the cost, structure, and construction complexity

Complex construction and low reliability

For the type with built-in temperature control switch, the production process is more complicated and the cost is difficult to reduce

For the type of external temperature control switch, in order to obtain a good protection effect, the position of the temperature control switch should be placed close to the heating floor. reliability, security risks

[0004] For the second implementation scheme on the market, there are mainly the following deficiencies: the implementation of ordinary PTC heating elements, according to our actual measurement, cannot obtain enough PTC effect, or does not have enough rheostat characteristics (the rheostat capacity is only about 50%) , can not effectively control the heating power from the safety point of view, this kind of floor is more from the point of view of the overall temperature control, rather than dedicated to the solution of safety problems

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