CN2773645Y - Closed water-temperature and water-level sensor detector - Google Patents

Abstract

The utility model relates to a totally-enclosed water-temperature and water-level sensor detector which is composed of a probe (1), a transducer (2) and a conducting wire (3). The outer shell of the probe (1) is made of insulated silica gel and electric silica gel into a whole. The utility model has the advantages of reasonable structure, simple process, low cost, reliable quality and high anti-interference capability, and can ensure the reliability of the detection of water temperature and water level. The utility model is suitable for the detection of the water temperature and the water level of water tanks of various civil water heaters.

Description

Totally-enclosed water-temperature water-level sensing detection device

Described technical field

The utility model belongs to the detection sensing device, particularly relates to the detection sensing device of water temperature and water level.

Background technology

The sensor of the detection water-temperature water-level of domestic hot water device use at present, general employing metal electrode is a detecting electrode, transmitter input impedance is less than normal relatively, detection is that break-make with the electric current in the metal detection electrode is a sign, because electrode is to be exposed in the water, long-term use at the easy scaling in detecting electrode place and be corroded, sealing problem is difficult to solve simultaneously, influences the serviceable life of detecting electrode.And existing water-temperature water-level sensing device production cost height, complex manufacturing technology, poor anti jamming capability.

Summary of the invention

The purpose of this utility model provides a kind of totally-enclosed sensing device that detects water-temperature water-level, and it has transmitter input impedance height, and detecting electrode is less scaling, and stability is strong, is characterized in anticorrosive, anti-aging, high temperature resistant, heat conduction is good, long service life.

The purpose of this utility model realizes by the following technical solutions:

Totally-enclosed water-temperature water-level sensing detection device of the present utility model is made up of probe, transmitter, lead, and the probe shell is made one by insulation silica gel and electric silica gel.

Totally-enclosed water-temperature water-level sensing detection device of the present utility model, lead and electric silica gel are connected to form the sensed water level electrode.

Totally-enclosed water-temperature water-level sensing detection device of the present utility model adopts the CMOS chip in the transmitter circuit.

Adopt electric silica gel for detecting the electrode of probe, the probe shell is made one by insulation silica gel and electric silica gel, and the silica gel probe can be positioned over the high input impedance transmitter that adapts with it in the detected water tank and be used.

The utility model is because the probe shell is a monolithic silica gel, insulation silica gel and electric silica gel are that quantitative spacing distributes, and promptly one section Silicon-On-Insulator is gluedd joint one section electric silica gel, connect one section insulation silica gel again, so analogize and form hermetically sealed probe shell, this shell contains two sections electric silica gels at least.Be provided with lead, wire ferrule, temperature element in probe, lead and electric silica gel are connected to form the sensed water level electrode.Probe cooperates with transmitter can detect multistage water level, and transmitter is full pouring aluminium enclosure designs, sound construction, and insulated enclosure, all weather operations, high input impedance, minimum to the probe corrosion, Si Mite triggers, and antijamming capability is strong.

The probe shell is made by electric silica gel and insulation silica gel, is distributed on the skeleton to lead, the quantitative spacing of wire ferrule, under High Temperature High Pressure, through sulfuration, compression molding.Line can adopt enameled wire to solve High Temperature High Pressure mold pressing difficult problem.

The beneficial effects of the utility model are, have transmitter input impedance height, and detecting electrode is less scaling, and stability is strong, and are anticorrosive, anti-aging, high temperature resistant, heat conduction is good, long service life.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cut-open view of Fig. 1;

Fig. 3 is the circuit theory diagrams of the utility model transmitter.

1 is probe, the 2nd among the figure, transmitter, the 3rd, lead, the 11st, insulation silica gel, the 12nd, electric silica gel, the 13rd, temperature element, the 14th, wire ferrule.

Specific embodiments

Below in conjunction with accompanying drawing specific embodiments of the present utility model is further described.

In Fig. 1 and Fig. 2, on probe 1, insulation silica gel 11 and electric silica gel 12 quantitative spacings ground are distributed on the skeleton (skeleton can be located at the interior or shell of probe 1 shell outward), skeleton plays a supportive role, under High Temperature High Pressure, molded through vulcanizing mold, insulation silica gel 11 is become one with electric silica gel 12, wire ferrule 14, lead 3 are connected to form the sensed water level electrode with electric silica gel 12.Pass in heat-shrink tube at joint lead 3, and this terminal line from outside draw and be wrapped on this end line hoop, temperature element 13 is arranged in insulation silica gel 11, because of silica gel has thermal conductivity preferably, temperature element 13 can detect the variation of water temperature exactly.

Referring to Fig. 3, the following work of transmitter: when water tank was anhydrous, the electric silica gel 12 that detects a, b, c, d each point on the probe 1 was open circuit with power supply E, and input low level, phase inverter output HIGH voltage, diode AND gate are sealed, V _oOutput HIGH voltage (supply voltage) is when water level rises gradually, and a, b, each end of c, d are imported high voltage, V successively _oVoltage descend successively, wherein:

$\mathrm{Vd}=\frac{R1+R2+R3}{R1+R2+R3+R4}\×(E-V_{o}L-\mathrm{VD})$

$\mathrm{VC}=\frac{R2+R3}{R2+R3+R4}\×(E-V_{o}L-\mathrm{VD})$

$\mathrm{Vb}=\frac{R3}{R3+R4}\×(E-V_{o}L-\mathrm{VD})$

Va＝(E-V _oL-VD

Wherein: V _oL is the standard saturation voltage drop, and VD is the diode forward conduction voltage drop.

Va, Vb, Vc, Vd are respectively the magnitude of voltage of water when being immersed in a, b, c, the d each point of probe 1.The resistance that changes R1, R2, R3, R4 can change output voltage values V arbitrarily.The circuit of the utility model embodiment adopts the CMOS chip, and it has two characteristics: (1) input high impedance can adapt to the bigger and unsettled actual conditions of electric silica gel resistivity; (2) this schmitt trigger can improve threshold level, prevents misoperation and interference.

The utility model provides a kind of sensing detection device, and this sensor can be used for detecting the water-temperature water-level of domestic hot water device, is a kind of very practical valuable again civilian detection water-temperature water-level sensor.The utility model compared with prior art has transmitter input impedance height, and detecting electrode is less scaling, and stability is strong, is characterized in anticorrosive, anti-aging, high temperature resistant, heat conduction is good, the life-span is long.Because of the present utility model rational in infrastructure, production technology is simple, reliable in quality, cost is low, can produce in batches, and is easy for installation, and greatly improve than existing sensing detection device its serviceable life, is convenient to produce in batches and promote.

Claims (3)

1, a kind of totally-enclosed water-temperature water-level sensing detection device is made up of probe (1), transmitter (2), lead (3), it is characterized in that: probe (1) shell is made one by insulation silica gel (11) and electric silica gel (12).

2, totally-enclosed water-temperature water-level sensing detection device according to claim 1 is characterized in that: lead (3) and electric silica gel (12) are connected to form the sensed water level electrode.

3, totally-enclosed water-temperature water-level sensing detection device according to claim 1 is characterized in that: adopt the CMOS chip in transmitter (2) circuit.

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