CN2447749Y

CN2447749Y - Water temp. and level indicator with alarm function for water tank

Info

Publication number: CN2447749Y
Application number: CN 00226913
Authority: CN
Inventors: 尹晓刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-10-25
Filing date: 2000-10-25
Publication date: 2001-09-12
Anticipated expiration: 2010-10-25

Abstract

The utility model relates to a display, which is mainly used for observing the water temperature and level in a water tank of a solar water heater and has a warning function. The power of the display is supplied by a battery. The utility model is composed of a soft plastic tubular flexible probe, a signal cable, a socket connector and a main display, wherein the soft plastic tubular flexible probe can be inserted into the water tank from an air permeable overflow pipe of the water tank and has the advantages of high temperature resistance, convenient pulling out, convenient cleanness and maintenance, and adjustable position of an electrode ring for a full water level; the main display arranged in a bathroom and is made of an expanded liquid crystal digital thermometer. The utility model solves the problems that the AC power supply of the existing devices is unsafe, and a rigid fixed water level electrode probe has hard installation, small scope of application, hard cleanness and hard maintenance. The utility model can be used for water tank type water heaters which are provided with the air permeable overflow pipes.

Description

The water tank water-temperature water-level display that warning function is arranged

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 run-down pipe water tank type, need not to change, and 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 plug 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 probe of the fixedly level electrode form of hard inconvenience cleaning usable range 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 ventilative run-down pipe water tank forms traditionally that is using in a large number can't install this type of probe additional at all.4, power failure back system can't use.5, big or small water tank can not be general.

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

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.The ventilative overflow of apsacline chew design make flexible probe by this ventilative chew enter in the water tank very convenient.3. probe (water level, water temperature information sensor) is designed to chew from the ventilative overflow of apsacline water tank and makes things convenient for high temperature resistant (the 100 ℃ of water temperatures) inserted in the water tank corrosion-resistant, 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 strengthened ability anti-oxidant, anti-electrolysis.Whole in addition device is low voltage operating, so the electrolysis phenomenon between probe electrode 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.4. this unit temp shows the little desk-top liquid crystal digital display thermometer (I selected module model HW957) that has utilized the existing cheapness in market, this thermometer power consumption only is the 1-3 milliampere, temperature-sensing element still adopts the thermistor of former thermometer and is mounted in the flexible probe by signal cable, this selection has saved the glow numerating tube and the relevant high-power promotion circuit 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, luminotron all adds current-limiting resistance, and warning luminotron water in the alarm water tank has been in the low-water level, because of its selected 2.2V could glimmer by build-up of luminance, so also played the effect of early warning cell voltage, each luminotron power consumption all is designed to less than 2 milliamperes.Add people's interruption use habit (time spent opens, and the time spent does not turn off) but so further affirmed the practicality of the long-term power supply of this device battery.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.7. probe " expiring " level electrode circle is designed to move up and down the adjusting position type, water tank to the different inner diameters size, by regulating the position of " expiring " level electrode circle, all can match easily, make the use of this display not be subjected to the different restriction of water tank specification basically and have characteristic that can be general.

The utility model has been owing to adopted such scheme, thus solved the problem that the market existing apparatus exists, and have that production cost is low, convenient for installation and maintenance, safe and reliable, selection easy, highly versatile, the characteristics being convenient to promote.Below in conjunction with graphic extension principle of the present utility model.

Fig. 1 the utility model embodiment system scheme of installation

Fig. 2 the utility model embodiment electrical schematic diagram

The flexible adjustable full-water level of Fig. 3 position probe embodiments structural representation

Fig. 4 basic display unit embodiment function declaration figure (Fig. 4 a Fig. 4 b)

The example structure synoptic diagram is chewed in the ventilative overflow of Fig. 5 apsacline.

Diagram: Fig. 1: 1. the ventilative overflow of plug connector 2. circumscribed full-water level signal wires 3. apsacline water tanks is chewed on 4. full-water level electrode collars, 5. flexible probe flexible pipes, 6. water tanks, 7. signal cables, 8. basic display units 9. (descending) water pipe 10. water supply valves 11. and is joined cold water pipe 12. low water level electrode circles 13. total electrode collar 14. middle water level electrode collars

Fig. 2: R ₁R ₂R ₃Be ' low ', ' in ', ' expiring ' water level information coupling and biasing resistor, R ₄R ₈R ₁₀Be emitter-base bandgap grading output load resistance, R ₅R ₇R ₉Be luminotron current-limiting resistance, R ₁₁R ₆Be coupling resistance, R ₁Be thermistor, A partly is the probe internal circuit, and B is total electrode, and ' expiring ' is the full-water level electrode, and ' low ' is low water level electrode, ' in ' be the middle water level electrode, E is a power supply, K ₁Be power switch, D ₁Low-water level indication luminotron, D ₂Be lower than low-water level warning luminotron.D ₃Middle water level indication luminotron, D ₄Full-water level indication luminotron, G ₁-G ₉Be transistor, K ₂Ring Alarming control switch for interrogating, C is liquid crystal digital thermometer (a 20-100 degree), K ₃For surveying water temperature room temperature change-over switch, R _T2For surveying room temperature thermistor, R ₁₂Be pull-up resistor, HA is a hummer.

Fig. 3: 1. plug connector 2. full-water level electrode collar signal wires and the surplus 3. flexible plastic bodys 4. full-water level electrode collar 5. full-water level electrode collar movings range that can move up and down the position are illustrated 6. low water level electrode circles, 7. thermistor 8. encapsulants, 9. total electrode collar 10. counterweights and convex ferrule thing 11. middle water level electrode collars.

Fig. 4: 1 signal cable 2. is full, in, low-water level indication luminotron 3. liquid crystal digital water thermometers illustrate 4. alarm lamps, 5. power switches, 6. housings, 7. news to ring Alarming control switches 8. hummer sound transmission aperture 9. water temperatures, room temperature change-over switch.Fig. 4 a is a front view.Fig. 4 b is a left view.

Fig. 5: 1. the ventilative overflow of apsacline is chewed 2. overflows of embodiment cut-open view and is chewed that 3. gong line interface tubes (water receiving case permeability cell) are 4. ventilative to be chewed.

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

A partly for the probe internal circuit, is provided with thermistor R on probe _T1And total electrode collar B and ' expire ' ' in ' ' low ' three level electrode circle, always electrode collar connects the positive pole of power supply, and the low water level electrode circle is through resistance R _tSame G ₁G ₂The two-stage 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 ₄Meet G ₂Base terminal output noble potential makes G ₂Satisfy and close conducting, D ₁High-lightness, R ₅Be current-limiting resistance, make and pass through D ₁Electric current be limited in the suitable value G at this moment 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.At this moment if K ₂Pull out to G ₃Collector terminal, the electronegative potential of this end are promptly controlled news and are rung warning circuit G ₈By R ₁₂The lower end is a noble potential, G ₉Conducting, the HA warning that pipes.Stir K ₂To full-water level luminotron current-limiting resistance R ₉The lower end is because of this end is noble potential at this moment, so HA stops to pipe.When if water level rises to ' in ' water level, the middle water level electrode collar with total electrode collar by aqueous medium conducting, the same principle, G ₄G ₅Work, D ₃High-lightness, R ₇Be current-limiting resistance.If during full-water level, G ₆G ₇Work, D ₄High-lightness, R ₉The lower end electronegative potential is added to G ₈Base stage, the HA alarm call is dialled K down ₂To G ₃Collector terminal, in like manner HA stops to pipe and waits for and be lower than the low-water level alarm condition.Ring warning circuit G because of interrogating ₈Base stage be to pass through R ₁₁, K ₂Be connected on corresponding light emitting diode lower end, be subjected to diode and triode PN junction to keep the influence of voltage, when supply voltage is lower than 2.2 volts, make G because of luminotron ends ₈Lose biasing, HA begins to pipe, so also played the effect of undervoltage warning.Survey the water temperature circuit by the thermistor R in the probe _T1And the liquid crystal digital thermometer that is located at basic display unit connects to form identical thermistor R in parallel on basic display unit _T2And pass through K ₃Switch, reach the purpose of not only may observe water temperature but also may observe bath temperature.This small-sized liquid crystal digital thermometer market is on sale, cheap, promotes with the 1-2 batteries usually, very power saving, have also have the date concurrently and the time shows, can directly utilize, its precision is enough as the water temperature detection of having a bath, and only handles getting final product in the protection against the tide sealing.D ₄D ₁, D ₂, D ₃All be set at greater than 2.2V luminous, so according to whether the brightness of luminotron also decidable cell voltage on the low side and whether needs are changed.In addition, each amplifying circuit all adopts multipole amplification, can effectively improve display sensitivity, and can make bigger that the output impedance of probe does, so just can effectively reduce voltage drop between each electrode collar in the water and the electric current by electrode collar, make the electrolytic oxidation phenomenon of electrode more small and weak.The utility model simple installation, take off that vertical-type original on the water tank is ventilative to be chewed, changing the ventilative overflow of apsacline chews, the full-water level electrode collar position of popping one's head in well according to water tank actual inner diameter adjusted size, adding will pop one's head in after the regulation surplus inserts in the water tank by ventilative the chewing of apsacline, and the plastics probe is met hot water and will be hung down into automatically at the bottom of the water tank, connects plug connector, get rid of signal cable to indoor, connecting basic display unit can use.

Claims

1. water tank water-temperature water-level display that warning function is arranged, it is by probe, the ventilative overflow of apsacline is chewed, plug connector, signal link, and basic display unit is formed, it is characterized in that: popping one's head in, the anti-high water temperature of inserting in the water tank also can conveniently be extracted cleaning out and the flexible plastic tubulose flexible probe of regulating can be moved with water tank internal diameter size size in probe full-water level electrode collar position in order chewing by the ventilative overflow of the apsacline of specially joining, probe is established total metal electrode circle and is joined constant weight on the termination, on probe, establish fixing low-water level, middle water level electrode collar and can move up and down the full-water level electrode collar of adjusting position, total electrode collar and low, the middle water level electrode collar 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, the full-water level electrode collar thoroughly does away with the directly welding outside flexible pipe of edge sheath signal wire by drawing one on the outer plug connector of probe, this signal wire length must leave certain surplus, 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, each signal wire is all insulation each other, 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, total electrode collar and low, in, the two ends up and down of level electrode circle and signal wire joint part are handled with making water-stop in the flexible pipe, probe lower end hose port is airtight greater than the convex water-stop material sealing of total electrode collar with external diameter, the waterproof material sealing of probe upper end, probe is inner to keep airtight.

2. the water tank water-temperature water-level display that warning function is arranged 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. according to claim 1 have the water tank water-temperature water-level display of warning function it is characterized in that: surveying the water temperature function is the liquid crystal digital displays temperature meter that directly utilizes the market ready-made, this thermometer is with surveying shared power supply of water level circuit and switch, and this thermometer sensing element is composed in parallel and is electrically connected by the synthermal meter of change-over switch by the thermistor that is located at the thermistor in the probe and be located in the basic display unit.

4, the water tank water-temperature water-level display that warning function is arranged according to claim 1, it is characterized in that: the low-water level of water level display part shows, is lower than that low-water level alarm, middle water level show, full-water level demonstration and warning, battery undervoltage warning circuit, rings alarm and circuit and is electrically connected and forms by being located at electrode collar, signal wire and plug connector, the signal cable on the probe and being located at light emitting diode, warning light emitting diode, news that the multi-level transistor amplifying circuit of basic display unit promotes.

5, according to claim 1 have the water-temperature water-level display of warning function it is characterized in that: during full-water level, the full-water level luminotron is luminous, news sound alarm pipes simultaneously, dial news sound gauge tap down, news are rung warning circuit and promptly are switched to and are lower than low-water level warning light emitting diode and connect collector terminal, pipe and promptly stop, when water level is lower than low-water level, the low-water level luminotron extinguishes, the warning lumination of light emitting diode, and news sound alarm pipes simultaneously, dial and go up news sound gauge tap, news sound warning circuit promptly is switched to the full-water level light emitting diode and connects collector terminal, and piping promptly stops, when supply voltage is lower than 2.2 volts, the light emitting diode both end voltage is crossed low and is ended, and it is under-voltage that news are rung the alarm prompting that begins to pipe.