CN102610339A - Temperature control resistor with combined structure - Google Patents

Abstract

The invention discloses a temperature control resistor with a combined structure, wherein the temperature control resistor with the combined structure comprises a shell and a resistor core packaged in the shell; the resistor core is provided with a high-temperature wire which is led out of the shell; the shell is also provided with a temperature switch; the temperature switch is connected to a winding wire of the resistor core in series; a mica plate insulation layer is arranged between the temperature switch and the resistor core for insulation; when an electric appliance operates normally, each performance index of the resistor is maintained, the temperature of the resistor rises when certain power is exceeded, the temperature switch is disconnected automatically, thus the resistor stops operating; and when the temperature decreases to the set temperature of the temperature switch, the resistor is connected again for operation, the safety operation of the electric appliance is ensured, and the damage and unsafe factors possibly caused by the high-temperature operation of the resistor are prevented. According to the invention, the resistor core and the temperature switch are combined in the same shell, dual-function integration is realized, the product safety and the general safety of an electric device are improved, the product structure simplification is achieved, and the temperature control resistor with the combined structure is convenient to use and mount for users.

Description

A kind of temperature resistance device of composite construction

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Technical field:

The present invention relates to the electronic devices and components field, specifically, is a kind of temperature control resistor of composite construction, has the automatic power-off protection function of overtemperature.

Background technology

In the industrial automation technology; The motor variable-frequency speed-regulating technology of electric drive is widely applied with its excellent high efficiency, High Power Factor and power savings; The power of employed charging resistor and braking resistor is increasing, because resistor is a kind of power consumption product, resistor generates heat because of consumed power in the course of the work; Ifs circuit breaks down; The big resistor that consumes energy will produce high temperature, at this moment not only can damage Power Resistor, and might cause unsafe factors such as burning.

Summary of the invention

The object of the present invention is to provide a kind of composite construction temperature resistance device, quit work the unsafe factor of avoiding the resistor hot operation to bring when the resistor temperature reaches design temperature automatically with temperature protection function.

The objective of the invention is to be achieved through following technical scheme; A kind of temperature resistance device of composite construction; Comprise a housing and be packaged in the resistor core in the housing; Resistor core is provided with the higher temperature line of drawing housing, it is characterized in that: also be provided with a temperature switch in the said housing, said temperature switch is connected in the coiling of resistor core.

The mica-sheet insulation layer is set between said temperature switch and the resistor core isolates.

The pin of said temperature switch is connected to the two ends of resistor core coiling.

Said temperature switch is with the thermostat of bimetal leaf as temperature-sensing element, like the KSD9700 Series Microprocessor Temperature Controller.

Beneficial effect of the present invention: during the electrical equipment operate as normal; Each item performance index that keep resistor; Temperature raise when resistor surpassed certain power, and the temperature switch automatic disconnection quits work resistor, connects resistor work when temperature drops to the temperature switch design temperature once more; The work of assurance security appliance, damage and the unsafe factor of avoiding the resistor hot operation to bring.The present invention is compounded in resistor core and temperature switch in the same housing, realizes that dual-use function is integrated, improves safety of product own and electronic equipment overall safety, reaches the simplification product structure, user-friendly installation.

Description of drawings

Fig. 1 is an embodiment of the invention master TV structure sketch map;

Fig. 2 is an embodiment of the invention plan structure sketch map.

Embodiment

In conjunction with Fig. 1, shown in Figure 2; The temperature resistance device of a kind of composite construction provided by the present invention; Comprise the Al-alloy casing 4 that thermal diffusivity is good and be packaged in the resistor core 1 in the housing 4, resistor core 1 is provided with thehigher temperature line 5 of drawing housing 4, andhigher temperature line 5 exits are connected withconnector 6; Resistor core 1 is selected anti-electric surge, flat electric resistance alloy wire-wound system structure that heat dispersion is good for use, with heat conduction preferably mica sheet as the coiling skeleton.Be provided with a heat sensitive temperature switch 2 in the housing 4; Thepin 8,9 of temperature switch 2 is connected to coiling 7 two ends of resistor core 1; Be connected in the coiling 7 of resistor core 1; The mica-sheet insulation layer is set between temperature switch 2 and the resistor core 1isolates 3, temperature switch 2 is encapsulated in the Al-alloy casing 4 with the insulator seal material after dressing up one with resistor core 1 series, and Al-alloy casing 4 inner end face and bottom surfaces are furnished with mica-sheet insulation layer 10,11 respectively.Temperature switch 2 is selected with the thermostat of bimetal leaf as temperature-sensing element, like the KSD9700 Series Microprocessor Temperature Controller, during the electrical equipment operate as normal; Bimetal leaf is in free state, and the contact is in closure/off-state, when temperature is increased to the operating temperature value; Bimetallic element is heated and produces internal stress and action rapidly; The opened/closed contact, cut-out/connection circuit, thus play heat protective effect.When temperature dropped to design temperature, contact auto-closing/disconnection recovered normal operating conditions.The size of switch temperature value depends on that resistor allows the overpower value, is confirmed to select by the user.

The foregoing description only is a preferred embodiments of the present invention; Technical conceive of the present invention and essential implementation have been specified; Be not to be that protection scope of the present invention is limited; All any simple modification that spirit is done according to the present invention and equivalent structure transformation or modification all should be encompassed within protection scope of the present invention.

Claims (5)

1. the temperature resistance device of a composite construction; Comprise a housing and be packaged in the resistor core in the housing; Resistor core is provided with the higher temperature line of drawing housing, it is characterized in that: also be provided with a temperature switch in the said housing, said temperature switch is connected in the coiling of resistor core.

2. the temperature resistance device of a kind of composite construction according to claim 1 is characterized in that: insulating barrier is set between said temperature switch and the resistor core isolates.

3. the temperature resistance device of a kind of composite construction according to claim 1 is characterized in that: the pin of said temperature switch is connected to the two ends of resistor core coiling.

4. the temperature resistance device of a kind of composite construction according to claim 2, it is characterized in that: said insulating barrier is a mica sheet.

5. according to the temperature resistance device of claim 1,2 or 3 described a kind of composite constructions, it is characterized in that: said temperature switch is with the thermostat of bimetal leaf as temperature-sensing element.

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