CN101050976A - Water-proof damp-proof packaging method for water level sensor of solar water heater - Google Patents

Abstract

A waterproof and moisture-proof packaging method of water level transducer on solar-energy water heater erects water level measurement elements at external of solar-energy water box and leads only electrode into water box by wire for making water level measurement elements be not operated in high-temperature and high-moisture water box so as to avoid detection error or failure caused by water and moisture.

Description

The water-proof damp-proof packaging method of water level sensor for solar water heater

The present invention be a kind of not only simply but also the highly effective level sensor that has solved solar water heater controller (comprising the water-temperature water-level display) the into method of damp problem of intaking.

Thereby the used level sensor of present solar water heater controller is operated in and is easy to into water in the water of high temperature and advances tide and influenced precision or inefficacy, cause controller to close and add water solenoid valve, make the water in the solar water heater not arrhea, cause huge water resource waste from overflow vent.This situation is the very big problem that the current industry faces.The encapsulation of current such sensor mainly divides following two kinds of methods.

1, the method is to do waterproof sealing with being used to survey between every section stainless steel contact of water level with the plastic material (as: heat-shrink tube, silica gel sleeve pipe etc.) of insulation, and the element (as resistance) that is used for sensed water level is encapsulated in stainless steel inside.Because of long-term work in the water of high temperature, water just may be from two kinds of unlike materials (stainless steel contact and plastic material) thus between enter sensor internal and cause the element tide of intaking into to influence accuracy of detection (as: as detecting high water stage when the low-water level) or lost efficacy.

2, the method is that element (as resistance) rheo-die-casting with sensed water level is in silica gel.This sensor is with the contact of electric silica gel material as sensed water level, and the silica gel material of insulation is used for insulation, and with these two kinds of material monolithic sput moulding, the element of water level (as resistance) just within it.Electric silica gel and non-conductive silica gel are not to be a kind of material, long-term work in the water of high temperature, just may cause between electric silica gel and the non-conductive silica gel cracking advance tide to the element (as resistance) of sensor internal thus influenced accuracy of detection (as: detecting high water stage as in low-water level the time) or inefficacy.

The present invention can solve thoroughly in order to following method that tide causes the problem that sensor is inaccurate or lost efficacy because of the element in the level sensor is intake into.This method is that the element (as resistance) that will measure water level is placed on the solar water container outside, then its electrode is guided in the water tank with lead, the element of measuring water level like this no longer is operated in hot and humid water tank inside, also just can not tide causes detecting inaccurate or lost efficacy because of intaking into.

1, will survey water level element (1) and be placed on the water tank outside, with the conductive material (2) of sufficiently long outer layer insulation (soft insulated conductor or hard insulated conductor or cover one deck waterproof insulation material on conductive material) its electrode is caused water tank inside, also can connect the bigger conductive material (4) of surface area ratio (as stainless steel etc.) in its end in order to improve its electric conductivity.And then will survey water level element (as resistance) partly with waterproof and dampproof material (5) encapsulation (sealing) with the plastic cement embedding or with plastic casing-pipe.Dotted line (3) will be placed on the water tank outside when using with top, and dotted line is placed on water tank inside when using with the lower part.

Fig. 1 is a structural representation of the present invention

Claims (1)

1, will survey water level element (1) and be placed on the water tank outside, with the conductive material (2) of sufficiently long outer layer insulation (soft insulated conductor or hard insulated conductor or cover one deck waterproof insulation material on conductive material) its electrode is caused water tank inside, also can connect the bigger conductive material (4) of surface area ratio (as stainless steel etc.) in its end in order to improve its electric conductivity.And then will survey water level element (as resistance) partly with waterproof and dampproof material (5) encapsulation (sealing) with the plastic cement embedding or with plastic casing-pipe.Dotted line (3) will be placed on the water tank outside when using with top, and dotted line is placed on water tank inside when using with the lower part.

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