CN2421619Y

CN2421619Y - Display device for water temp and level

Info

Publication number: CN2421619Y
Application number: CN 00226292
Authority: CN
Inventors: 尹晓刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-18
Filing date: 2000-04-18
Publication date: 2001-02-28
Anticipated expiration: 2010-04-18

Abstract

The utility model relates to a display device used for observing the water temperature and the water level in a water tank of a solar energy water heater. The power of the display device is supplied by two 1.5V batteries. The utility model is composed of a soft plastic tubular flexible probe, a signal connecting line, a socket connector and a main display which is arranged in a bathroom. The soft plastic tubular flexible probe can be inserted into the water tank from an upper ventilation overflow port of the water tank and has the advantages of high temperature resistance, aging resistance, convenient extraction, convenient clean and convenient maintenance. The utility model solves the problems of incomplete alternating current supply, complex structure, high cost inconvenient installation of a hard probe, small application range and incapable of clean and maintenance of the probe. The utility model can be used for water tank type water heaters which are provided with upper ventilation overflow ports, and the water heaters dispense with modification.

Description

The water-temperature water-level display

The utility model relates to a kind of display that is mainly used to observe water-temperature water-level in the solar water heater water tank, especially to having the solar water heater of going up ventilative overflow vent water tank type, need not any change, can conveniently install use additional.

What present known solar water heater water tank water-temperature water-level display control apparatus adopted all that 220V Alternating Current Power Supply and probe (water temperature, water level information sensor) all make hard can only be fixed on the form of using on certain single model water-heater water tank, such setting, have following shortcoming: 1, main display controller generally all is installed in the toilet to make things convenient for control observation, but in the toilet that moisture is filtered, if adopt the 220V alternating current, the people is total to worry that a unsafe problem is arranged.2,, have to use the problem of the hurried increasing of cost of products that expensive anticreep safety apparatus and quality cables, high withstand voltage element etc. cause for improving safety coefficient.3, the inconvenient cleaning usable range of the machine made probe of hard is narrow, owing in water tank hot water, soak for a long time, incrustation scale, oxide etc. are attached to making probe sensitivity reduce gradually until can't using on the electrode collar, and the solar water heater of a large amount of mounted traditional approachs that using can't install this type of probe additional at all.4, power failure back system just can't use.

The purpose of this utility model just provides a kind of can addressing the above problem, and makes things convenient for conventional water heaters to install the safe and reliable of use additional, and low cost is drawn materials easily, maintains easily, can popularize the water tank water-temperature water-level display that uses.

The purpose of this utility model is achieved in that 1, this device provides all that electric power is arranged by being located at the joint of 2 on main display controller 1.5V battery, and each electronic devices and components is all implemented circuit design with this low-voltage.So influence that is not had a power failure.2. temperature measurement circuit is by the relative constant voltage power supply of the 2.0V after the secondary voltage stabilizing, so guaranteed the accuracy of (3.6V-2.3V) measurement temperature in the battery ordinary life period.3. probe (water level, water temperature information sensor) is designed to and can makes things convenient for high temperature resistant (the 100 ℃ of water temperatures) inserted in the water tank corrosion-resistant from the water tank ventilation mouth, and can conveniently extract the plastic tube-shape flexible probe of cleaning out, the probe electrode contact design is the tin metal circle of broad area, has increased intensity anti-oxidant, anti-electrolysis.Whole in addition device is low voltage operating, so the electrolysis of probe interpolar is very little, flexible probe also can conveniently be extracted the attachment of clean surface out in addition, so solved the problem that probe sensitivity can not guarantee for a long time, has also solved the problem that existing display is inconvenient to install additional.4. this unit temp shows the indication of employing light emitting diode, working current is very little, improved voltage regulation result, and has saved the glow numerating tube and the relevant circuit that promotes of the existing general costliness in market, production cost and power consumption are greatly reduced, and it is enough to monitor its precision as the bathing water temperature.5. complete machine all adopts the low power consumption design, and reporting to the police has been in the low-water level from scintillation vial water in the alarm water tank, because of its 2.2V could glimmer by build-up of luminance, so also played the effect of early warning cell voltage, all is designed to less than 5 milliamperes from scintillation vial and each luminotron power consumption.Add people's interruption use habit (time spent opens, and the time spent does not turn off) but so further affirmed the practicality of this device battery power supply.6. this device makes each element all be in the service condition that is perfectly safe, so this display possesses the condition of long-term optimum running owing to adopted low voltage power supply.

The utility model has been owing to adopted such scheme, thus solved the problem of market existing apparatus existence, and it is low, convenient for installation and maintenance, safe and reliable to have a production cost, selection is easy, the characteristics of being convenient to promote.

Fig. 1 the utility model is installed the embodiment synoptic diagram

Fig. 2 the utility model circuit theory diagrams

Fig. 3 flexible probe example structure synoptic diagram

Fig. 4 basic display unit embodiment function declaration figure

Diagram: Fig. 1: 1. (descending) water pipe 10. water supply valves 11. are joined cold water pipe 12. low water level electrode circles 13. total electrode collars on plug connector 2. water tank ventilation mouths 3. water tank overflow mouths 4. high water level electrode circles 5. flexible probe flexible pipes 6. water tanks 7. signal links 8. basic display units 9.

Fig. 2: R ₁R ₂Be low, high water stage information coupling and biasing resistor, R ₃Be emitter-base bandgap grading output load resistance, R ₄Be coupling resistance, R ₆R ₇Be mu balanced circuit resistance, R ₅Be temperature measurement circuit biasing resistor, R _tBe thermistor, A partly is a probe circuit, and B is total electrode, and ' height ' is high water level electrode, and ' low ' is low water level electrode, and E is a power supply, and K is a switch, D ₁Low-water level indication luminotron, D ₂Being lower than low-water level reports to the police from scintillation vial.D ₃High water stage indication luminotron, D ₄Water temperature indication luminotron, D ₅D ₆Voltage stabilizing diode, G ₁-G ₅Be transistor.

Fig. 3: 1. plug connector 2. signal link 3. flexible plastic tubes, 4. high water level electrode circles and pad 5. low water level electrode circles and pad 6. thermistors 7. probe termination counterweight 8. encapsulants 9. water-stop materials 10. total electrode collar and pads.

Fig. 4: 1 signal link, 2. high and low water level indicator light 3. temperature indicators 4. alarm lamps 5. switches 6. housings 7. housing front and rear covers signals.

Further specify principle of work of the present utility model below in conjunction with Fig. 2:

A is a probe circuit partly, is provided with thermistor R _tAnd total electrode collar B and " height " " low " two level electrode circles, total electrode collar connects the positive pole of power supply, and the low water level electrode circle is through resistance R ₁Same G ₁G ₂The amplifier of forming connects, and when reaching " low-water level " as if water, the low water level electrode circle is by aqueous medium and total electrode collar B conducting, G ₁The forward bias conducting, R ₃Meet G ₂The base terminal output HIGH voltage makes G ₂Satisfy and close conducting, D ₁High-lightness, G ₃Because of base stage is that electronegative potential ends, so D ₂Not luminous.When if water level is lower than " low " level electrode circle, the low water level electrode circle is with total electrode collar open circuit, G ₁Do not end G because of there being biasing ₂Base stage is an electronegative potential, G ₂End D ₁Extinguish, because of G ₂Current collection is noble potential very, G ₃Satisfy and close conducting, D ₂High-lightness alarm water level has been lower than " low " water level.When if water level rises to " height " water level, the high water level electrode circle passes through aqueous medium conducting, the same principle, G with total electrode collar ₄Work, D ₃High-lightness is surveyed the water temperature circuit by the thermistor R in the probe _tAnd the R of basic display unit ₅, G ₅, D ₄, and D ₅, D ₆, R ₆, R ₇The secondary mu balanced circuit of forming constitutes, R _tWith R ₅Form biasing circuit of divided voltage, R _tBe the thermistor of negative temperature characteristic, make the R when reaching set water temperature (being generally 40 ℃) _tValue and R ₅The partial pressure value of value is than just in time making G ₅Conducting, D ₄The high-lightness prompting.D ₁, D ₂, D ₃All be set at greater than 2.2V luminous, so be that whether the decidable cell voltage on the low side and whether needs are changed according to the brightness of luminotron.In addition, each amplifying circuit can effectively improve display sensitivity if adopt multipole amplification, and can make bigger that the output impedance of probe does, so just can effectively reduce voltage between the electrode collar and the electric current by electrode collar, make the electrolytic oxidation phenomenon of electrode more small and weak.

Claims

1. water temperature in the may observe water tank, water level, and has a display that is lower than the low-water level warning function, it is by probe, signal link, plug connector and basic display unit are formed, it is characterized in that: pop one's head in to inserting anti-high water temperature in the water tank from the ventilative overflow vent of water tank, anti-aging, and can conveniently extract the flexible plastic tubulose flexible probe of cleaning out, probe is established total metal electrode circle on the termination, and join constant weight, on probe, establish low water level electrode circle and high water level electrode circle, total electrode collar and low, the high water level electrode circle is by being located at the signal link welding of drawing from the relevant position in the flexible pipe, each fairlead is all done the water-stop processing on the flexible pipe, establish thermal sensing element in the flexible pipe of sound end head position, and by corresponding signal lines in flexible pipe, be connected to the probe outside plug connector on, thermal sensing element and connecting line exposed part are all done waterproof sealing and are handled, each electrode collar is anticorrosive with scolding tin or other, anti-oxidant, the conductive metallic material coating that is difficult for electrolysis, the two ends up and down of total electrode collar and " low " level electrode circle and signal wire joint part are handled with making water-stop in the flexible pipe, and probe termination hose port is airtight greater than the convex water-stop material sealing of total electrode collar with external diameter.

2. water-temperature water-level display according to claim 1 is characterized in that: this display provides electric power by being located at the joint of 2 on basic display unit 1.5V battery.

3. water-temperature water-level display according to claim 1 is characterized in that: survey the water temperature circuit by the relative constant voltage power supply that provides after the voltage stabilizing of secondary mu balanced circuit, by the thermal sensing element, the signal link that are located in the probe, and be located at the transistor amplifier circuit of basic display unit and the light emitting diode electrical connection composition of promotion.

4, water-temperature water-level display according to claim 1, it is characterized in that: the low-water level of water level display part shows, is lower than low-water level alarm, high water stage and shows, forms by being located at electrode collar and plug connector, the signal link on the probe and being located at the transistor amplifier circuit of basic display unit and being electrically connected by the light emitting diode of its promotion, and alarm lamp adopts the luminotron that glimmers certainly.