CN102374662A - Water heater with scaling alarming indication function - Google Patents
Water heater with scaling alarming indication function Download PDFInfo
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- CN102374662A CN102374662A CN2010102631113A CN201010263111A CN102374662A CN 102374662 A CN102374662 A CN 102374662A CN 2010102631113 A CN2010102631113 A CN 2010102631113A CN 201010263111 A CN201010263111 A CN 201010263111A CN 102374662 A CN102374662 A CN 102374662A
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Abstract
The invention relates to a water heater with a scaling alarming indication function. A switch controller in the water heater comprises a signal preprocessing circuit, a signal conversion circuit, a single chip microcomputer, an alarming indication alerter, a water quality sensor and a temperature sensor. The water heater can be used for judging the water quality of water used in the water heart through the detection on the water quality, analyzing the time periods of scaling under different water quality and the scaling degree of the corresponding period according to a judging result, and timely prompting a user. Therefore, the user can learn and master the current service condition and the scaling degree of the water heater, and judges whether to clean an inner container and remove scales in real time. According to the invention, not only is the service life of the water heater greatly prolonged, but also the use safety is improved for the user; and the user can timely clean the inner container to remove the scale so as to effectively prevent potential safety hazards on water utilization due to the polluted water in the inner container.
Description
Technical field
The present invention relates to a kind of water heater, particularly a kind of water heater that possesses fouling warning deixis.
Background technology
For electric heater, fouling is to influence water heater service life and user's important hidden danger safe in utilization always.How effectively to solve the problem that fouling brings, become the important problem directly perceived of electric heater development.In electric heater, when general water temperature is heated to 40 ℃, just begin to have fouling tendency to take place, scale velocity is obviously accelerated when being heated to 60-70 ℃.The slow water of flow velocity is easy scale formation more, in the water heater water mobile be the utmost point slowly, scale velocity can be faster.These dirts are hard like calculus, and it is very poor to transmit the ability of heat, only reach irony or glass 1% less than, these dirts can be on the increase, can the many adverse consequences of generation in the use of water heater:
A makes the caloric receptivity of water not enough, and the temperature of water is difficult to raise, the electricity charge of waste about 30%.By the 30 yuan of calculating of need of heating up water in every month, about 10 yuan were wasted.
B is prone to cause maloperation because probe by the incrustation scale parcel, is difficult to detect the signal of water temperature and water level.
The electrothermal tube efficiency of heating surface of c assistant heating reduces.Because electrothermal tube is wrapped up by incrustation scale, heat distributes and does not go out, and heat is too high in causing, and often blows heating wire or hardening cracks the electric heating pipe box, causes danger easily, has to often change.Fouling also can make metal covering enrichment and produce the chemical attack reaction under dirt such as some corrosion component such as H+ in the water, OH-, Cl-, Mg2+, S2-.The result of corrosion is that localized metallic is damaged attenuate, and corrosion can reach and penetrate the equipment steel plate, the degree that makes equipment leakage, breakage even lost efficacy.Thereby the maintenance of equipment expense is increased.During seriously corroded, equipment is scrapped in advance.
The d internal diameter of the pipeline attenuates.Because the incrustation scale of knot stops in the pipeline, makes current not smooth.All above-mentioned faults can make the serviceability of water heater have a greatly reduced quality, and cause great inconvenience and trouble to the user.
The e incrustation scale is to the harm of health.Tartar, periodontitis often are to be caused by incrustation scale.Can cause the people desperately still do not have the preventible Legionella bacteria of vaccine so far, just conceal in incrustation scale, annual in the world about 150,000 people die from this germ, fouling also is very serious for the injury of user's human body.
And at present, existing electric heater can't detect the fouling degree of water heater effectively, accurately and remind user's scale removal timely, causes shortening of electric heater service life, and the safety in utilization of water heater declines to a great extent.Also can't be according to the difference condition of different regions water quality, judge the different time of water heater scaling and need to clean, the time bar of scale removal.Because water quality can not get monitoring, can't promptly and accurately judge with the water environment quality, cause the influence that the variation of fouling degree causes the user after the water quality variation, the water quality of polluting because of fouling is cooked and is all brought influence having a bath, wash dish.
Because do not detect the method for water heater water quality, existing electric heater can't detect the fouling degree of electric heater according to the situation of water quality, causes the secondary pollution of water quality.The electric conductivity of water is an important indicator of water quality quality, and resistivity should be greater than 1300 Ω cm 15 ℃ the time like GB regulation running water, and general pure water resistivity in the time of 25 ℃ can reach 18.3M Ω cm.
Contain Ca in the general city tap-water
2+, Mg
2+Etc. electron ion, if water quality is relatively poor, contained number of ions is more, and ion can directly influence the fouling time of incrustation scale, and the content of mineral substances difference of various places running water is very big, is generally 100-450ppm.Therefore can confirm the detection of water quality and fouling degree with the mode of the electric conductivity of test water.
From the present situation of present water quality detection, for the detection method of water quality in the water heater, how to accomplish water quality that real-time and effective detects water heater embody water heater scaling inside degree still be one problem to be solved is arranged.Present water quality inspection technique does not relate to the detection to water heater water, and monitors water heater internal incrustation situation through water quality detection.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the present invention provides a kind of water heater that possesses fouling warning deixis.Through detection to water quality; Judge water quality condition; And analyze the information such as time bar, fouling degree of different quality situation lower water-heater internal incrustation and remind the user, being the cleaning of water heater, scale removal is made prompting to the user; For the user provides comprehensive detection, be convenient to the operating position that the user grasps water heater.
The main technical schemes that the present invention adopts is: a kind of water heater that possesses fouling warning deixis; Comprise shell, inner bag, the water inlet that is communicated with said inner bag and delivery port, heater, temperature sensor and controller; Said controller comprises signal pre-processing circuit, signaling conversion circuit, single-chip microcomputer and warning indicator; Be provided with water quality sensor and temperature compensation sensor in the said inner bag, said temperature compensation sensor be located at said water quality sensor around; Said water quality sensor and temperature compensation sensor input to said signal pre-processing circuit with water quality signal and temperature compensation signal and handle; Signal after said signal pre-processing circuit will be handled inputs to said signaling conversion circuit and carries out the signal conversion, and the signal after the conversion inputs to said single-chip microcomputer; Said single-chip microcomputer comprises temperature compensation module, timing module; Said temperature compensation module compensates computing according to the temperature compensation signal value of input to the water quality signal value; The signal value of said timing module after according to compensation operation starts the time-count cycle of corresponding duration; Output by said single-chip microcomputer after said timing time-count cycle is accomplished outputs control signals to said warning indicator startup work, reminds the foul of user's water heater.
The present invention also adopts following attached technical scheme: the signal value behind the compensation operation is corresponding one by one with time-count cycle, the time-count cycle of the corresponding different durations of the signal value of different sizes;
Said single-chip microcomputer reads water quality signal and temperature compensation signal by the cycle; Accumulate stack by the signal value of said accumulation computing module after after the temperature compensated computing to compensation operation; The signal that the output of said single-chip microcomputer will be accumulated stack exports said warning indicator to; By the form demonstration accumulation stack amount of said warning indicator, come the fouling accumulation situation of display water heater with this with block diagram or cake chart;
Said single-chip microcomputer is in each cycle; Repeatedly read water quality signal and temperature compensation signal; Averaged by said accumulation computing module after the temperature compensated computing, said accumulation computing module is accumulated stack to the mean value in each cycle, and the signal that the output of said single-chip microcomputer will be accumulated stack exports said warning indicator to; By the form demonstration accumulation stack amount of said warning indicator with block diagram or cake chart, the fouling accumulation situation of coming display water heater successively;
Said accumulation computing module is provided with a reference value; When said accumulation superposition during more than or equal to said a reference value; The output of said single-chip microcomputer outputs control signals to said warning indicator, and the block diagram or the cake chart that make said warning indicator be by red display, and/or sends sound and light alarm;
When said accumulation superposition during more than or equal to said a reference value, the accumulation stack computing of next round is carried out in said single-chip microcomputer zero clearing;
Said single-chip microcomputer also comprises comparison module, and value and the preset reference value of said comparison module after to compensation operation compares: the value relatively is greater than a, and then timing module started for first time-count cycle, and the timing time of said first time-count cycle is J; Or the value relatively more than or equal to b smaller or equal to a, then timing module started for second time-count cycle, the timing time of said second time-count cycle is K; Or the value relatively is less than b; Then timing module started for the 3rd timing cycle; The timing time in said the 3rd timing cycle is L; Said J＞K＞L, the output by said single-chip microcomputer after said first time-count cycle or second time-count cycle or the timing of the 3rd timing cycle are accomplished outputs control signals to said warning indicator startup work, reminds the foul of user's water heater;
Said signal pre-processing circuit comprises the water quality detection circuit; Temperature-compensation circuit; Said water quality detection circuit detects the resistance signal of water and changes voltage signal into through water quality sensor and inputs to said signaling conversion circuit, and said temperature-compensation circuit detects the temperature signal of water and changes voltage signal into through said temperature sensor and inputs to said signaling conversion circuit;
Said water quality sensor is positioned at the middle part or the bottom of said inner bag;
Said water quality detection circuit also comprises first resistance; One end ground connection of said first resistance; One end of said water quality sensor is connected with Vcc, and the other end of said first resistance and the other end of said water quality sensor together insert No. 1 input port of said single-chip microcomputer; Said temperature-compensation circuit also comprises second resistance and first electric capacity; Said second resistance and the parallel connection of said first electric capacity; And the end after the parallel connection links to each other with Vcc, common No. 2 input ports that insert said single-chip microcomputer of an end of the other end and said temperature sensor, the other end ground connection of said temperature sensor;
Said single-chip microcomputer also comprises the flash memory, stores the signal in the said single-chip microcomputer;
Signal relatively, its voltage is below 20% of single-chip microcomputer supply voltage, and then timing module started for first time-count cycle, and the timing time of said first time-count cycle is J; Or the signal relatively, its voltage the single-chip microcomputer supply voltage 20% to 40% between, then timing module started for second time-count cycle, the timing time of said second time-count cycle is K; Or the signal relatively, its voltage is at more than 40% of single-chip microcomputer supply voltage, and then timing module started for the 3rd timing cycle, and the timing time in said the 3rd timing cycle is L, said J＞K＞L.
The beneficial effect that adopts the present invention to bring is: (1) the present invention is through the detection to water quality; Judge the quality of the used water quality of water heater; And analyze time cycle of fouling under the different quality according to judged result, and degree that should week after date fouling, and in time remind the user.Make the present operating position of the hot device of understanding and grasping of user real time, whether the fouling degree need clean inner bag, scale removal.Not only improved the service life of water heater greatly, and to also making improvement on user's the safety in utilization.The user can clean inner bag timely, and scale removal has effectively been avoided being polluted because of inner bag water quality, and causes the security hidden danger of water.(2) pass through to detect the electric conductivity of water, thereby calculate Ca in the unit volume running water
2+, Mg
2+Etc. electron ion quantity and water quality condition; After reflecting according to water quality condition how long this condition of water quality lower water-heater uses; Which kind of degree its internal incrustation can reach, and makes the user implement to grasp and understands the present state of water heater, and scale removal in time, clean inner bag and prolong electric heater service life.(3) the present invention through detecting water electric conductivity and temperature and convert voltage signal to; Through the temperature-compensating computing resistance value of water is proofreaied and correct; And start the time-count cycle of corresponding different durations according to the size of the value after the temperature-compensating computing; After accomplishing time-count cycle, start warning indicator, the situation of water heater scaling is provided for the user.(4) in further improvement project provided by the invention; By the cycle water quality signal is accumulated the stack computing by the accumulation laminating module; And the cake chart or the block diagram that pass through in the warning indicator show the change procedure of accumulating the stack amount; Not only can detect the fouling intensity of variation of water heater in real time, dynamically, also show, make the understanding water heater foul instantly and the degree of fouling of user real time for the user provides real-time fouling degree monitoring.The inaccurate error problem of detection that the processing method of accumulation stack can effectively avoid the water heater environmental change to cause change of water quality to bring.(5) in more further solution provided by the invention; For detecting and avoid the detection error that the water environmental change brings more accurately, single-chip microcomputer repeatedly reads the water quality signal in each cycle, and averages; Accumulate stack with the mean value in each cycle then; Cycle can be 1 month, in 1 month cycle, can divide and read the water quality signal 4 times, makes dynamic monitoring more accurate like this; Avoid water quality environment to change the detection error of bringing, make the fouling monitoring more accurate.(6) in the another kind of scheme provided by the invention, be provided with comparison module in the single-chip microcomputer.Detect the electric conductivity and the temperature of water and convert voltage signal to; Through the temperature-compensating computing resistance value of water is proofreaied and correct; And a reference value that the value after the temperature-compensating computing and single-chip microcomputer are set compares; And start corresponding timing circuit timing according to Different Results relatively, after timing is accomplished, start the fouling degree that the present water heater of user is reminded in warning indicator work.Because the quality of water quality electric conductivity has directly been reacted the quality of water quality, i.e. what of calcium ions and magnesium ions in the water, this has also directly reacted degree, the speed of fouling.Through detecting the quality of differentiating water quality, start corresponding timing circuit.The fouling degree of water heater can be provided for the user more accurately, the information that whether need clean inner bag, scale removal is provided for the client.(7) temperature compensation module is that the detection of water quality sensor provides water temperature temperature difference school team, avoids water quality sensor to cause because of water temperature changes detecting to lose accurate situation and occurs, and makes detection more accurate.(8) because the water quality of water heater is monitored, can accurately monitor and show the water quality situation, for the user removes incrustation scale, safeguards that inner bag gives security, water heater water quality is guaranteed, more help user's use, have a bath, wash dish and cook etc.Also improved the security that the user uses.
Description of drawings
Fig. 1 is the structural representation of water heater of the present invention;
Fig. 2 is the circuit diagram of water heater of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description:
Like Fig. 1, shown in Figure 2; Be a kind of water heater that possesses fouling warning deixis provided by the invention; Comprise shell 1, inner bag, the water inlet 2 that is communicated with said inner bag and delivery port 3, heater, temperature sensor and controller; Said controller comprises signal pre-processing circuit, signaling conversion circuit, single-chip microcomputer IC and warning indicator; Be provided with water quality sensor R and temperature compensation sensor RT in the said inner bag, said temperature compensation sensor RT be located at said water quality sensor R around; Said water quality sensor and temperature compensation sensor input to said signal pre-processing circuit with water quality signal and temperature compensation signal and handle; Signal after said signal pre-processing circuit will be handled inputs to said signaling conversion circuit and carries out the signal conversion, and the signal after the conversion inputs to said single-chip microcomputer IC; Said single-chip microcomputer IC comprises temperature compensation module, timing module; Said temperature compensation module compensates computing according to the temperature compensation signal value of input to the water quality signal value; The signal value of said timing module after according to compensation operation starts the time-count cycle of corresponding duration; Output by said single-chip microcomputer after said timing time-count cycle is accomplished outputs control signals to said warning indicator startup work, reminds the foul of user's water heater.
Temperature-compensating computing described here is for fear of the water quality sensor temperature influence and the resistance detection of water is lost accuracy.Definite says, temperature-compensating is to remedy the too high or too low resistance value to water of water temperature to detect the influence that brings.The resistance value of general water detects under the water temperature of 25 degree carries out.The effect of temperature-compensating is to be higher than 25 degree or to be lower than 25 when spending when actual water temperature, and resistance value is proofreaied and correct.Such as, when water temperature is 60 when spending, the signal of the detected resistance value of water quality sensor is 2K, so the temperature-compensating computing then can with the water temperature that exceeds 25 degree promptly the corresponding offset 5%*2K of 35 degree from the 2K numerical value of reality, deduct i.e.: 2K-2K*5%=1.9K.Same reason, if temperature is lower than 25 degree, then temperature-compensating computing meeting adds certain offset on the basis of actual resistance.
In this programme, the signal value behind the compensation operation is corresponding one by one with time-count cycle, the time-count cycle of the corresponding different durations of the signal value of different sizes.Form a tabular form, the signal values of different sizes are the time-count cycle of corresponding different durations separately, is 1v like the voltage of signal value, and be 3 years corresponding time-count cycle, for 2v corresponding time-count cycle is 2 years, for 3v corresponding time-count cycle is 1 year.For the accuracy that detects, can be with numerical value and the more refinement of doing time-count cycle.
In further preferred version provided by the invention: said single-chip microcomputer IC also comprises the accumulation computing module; Said single-chip microcomputer reads water quality signal and temperature compensation signal by the cycle; Accumulate stack by the signal value of said accumulation computing module after after the temperature compensated computing to compensation operation; The signal that the output of said single-chip microcomputer will be accumulated stack exports said warning indicator to; By the form demonstration accumulation stack amount of said warning indicator, come the fouling accumulation situation of display water heater with this with block diagram or cake chart.In this programme, by the cycle water quality signal is accumulated the stack computing by the accumulation laminating module, and show the change procedure of accumulation stack amount through cake chart in the warning indicator or block diagram.Such as single-chip microcomputer but 1 month be one-period, read signal value each the end of month one time, and the accumulative total stack; On warning indicator, embody the variation that adds up superposition through increasing gradually of block diagram or cake chart; Signal value voltage when first month is 1v, and second month and trimestral signal value are 1v, and the value after the accumulative total stack is 3v; Then the form with grid increases gradually on block diagram or cake chart; Reflect the situation of water quality in the inner bag and the situation of change of fouling under this water quality with this, the deterioration degree of the fast face surface water quality that block diagram increases and the speed of fouling, the weight of recruitment how many surperficial water heater scaling degree of block diagram.The great advantage of this scheme is to detect in real time, dynamically the fouling intensity of variation of water heater;, the user shows that the understanding water heater that makes user real time foul and the degree of fouling instantly provides solution for providing the monitoring of real-time fouling degree.The inaccurate error problem of detection that the processing method of accumulation stack can effectively avoid the water heater environmental change to cause change of water quality to bring.Change like water in the process of using, or water heater changed the environment of installing and using, will be real-time in the detection of ensuing this month embody and embodies through block diagram or cake chart.
In more further preferred version provided by the invention: said single-chip microcomputer IC is in each cycle; Repeatedly read water quality signal and temperature compensation signal; Average by said accumulation computing module after the temperature compensated computing; Said accumulation computing module is accumulated stack to the mean value in each cycle; The signal that the output of said single-chip microcomputer will be accumulated stack exports said warning indicator to, by the form demonstration accumulation stack amount of said warning indicator with block diagram or cake chart, comes the fouling accumulation situation of display water heater with this.Said accumulation computing module is provided with a reference value; When said accumulation superposition during more than or equal to said a reference value; The output of said single-chip microcomputer outputs control signals to said warning indicator, and the block diagram or the cake chart that make said warning indicator be by red display, and/or sends sound and light alarm.When said accumulation superposition during more than or equal to said a reference value, the accumulation stack computing of next round is carried out in said single-chip microcomputer IC zero clearing.
Single-chip microcomputer repeatedly reads the water quality signal in each cycle, and averages, and accumulates stack with the mean value in each cycle then.Cycle can be 1 month, in 1 month cycle, can divide and read the water quality signal 4 times, removes the mean value of 4 water quality signals during to the end of month, and every month mean value is accumulated stack.Make dynamic monitoring more accurate like this, avoid water quality environment to change the detection error of bringing, make the fouling monitoring more accurate.Can come the time of adjustment cycle according to the situation of various places, 1 month or 1 season or half a year are one-period.Cycle is short more, and the error that change of water quality is caused is just more little, and the monitoring accuracy of water quality detection and fouling is just higher.
The present invention also provides another kind of scheme; Said single-chip microcomputer IC also comprises comparison module; Value and the preset reference value of said comparison module after to compensation operation compares: the value relatively is greater than a, and then timing module started for first time-count cycle, and the timing time of said first time-count cycle is J; Or the value relatively more than or equal to b smaller or equal to a, then timing module started for second time-count cycle, the timing time of said second time-count cycle is K; Or the value relatively is less than b; Then timing module started for the 3rd timing cycle; The timing time in said the 3rd timing cycle is L; Said J＞K＞L, the output by said single-chip microcomputer after said first time-count cycle or second time-count cycle or the timing of the 3rd timing cycle are accomplished outputs control signals to said warning indicator startup work, reminds the foul of user's water heater.
Wherein said a reference value is constant according to the area and the relative distance of first detecting electrode in the water quality sensor and second detecting electrode, under the constant situation of the resistance of first resistance R 1, and the data that draw through test of many times, test.This a reference value has reflected the benchmark that fouling in the water heater is whether serious, when the value after the temperature compensated computing and this a reference value relatively after, its result's difference has then been reacted the actual water quality quality and the degree of water heater scaling accordingly.Different result corresponding different timing circuits, start the timing circuit timing, after timing is accomplished, start warning indicator and remind the present water quality situation of user, and in the present fouling degree of this water quality situation lower water-heater.In the present embodiment, the value after the temperature compensated computing and said a reference value result relatively, if its voltage below 1V, then timing module started for first time-count cycle, the timing time of said first time-count cycle is between 2 years to 3 years; If or its voltage is between 1V to 2V, then timing module started for second time-count cycle, and the timing time of said second time-count cycle is between 1 year to 2 years; If or its voltage is more than 2V, then timing module started for the 3rd timing cycle, and the timing time in said the 3rd timing cycle is in 1 year.
As shown in Figure 2; Said signal pre-processing circuit comprises the water quality detection circuit; Temperature-compensation circuit; Said water quality detection circuit detects the resistance signal of water and changes voltage signal into through water quality sensor R and inputs to said signaling conversion circuit, and said temperature-compensation circuit detects the temperature signal of water and changes voltage signal into through said temperature sensor RT and inputs to said signaling conversion circuit.
Said testing circuit also comprises first resistance R 1; One end ground connection of said first resistance R 1; The end of said water quality sensor R is connected with Vcc, and the other end of the other end of said first resistance R 1 and said water quality sensor R together inserts No. 1 input port of said single-chip microcomputer IC.Said temperature-compensation circuit also comprises second resistance R 2 and first capacitor C 1; Said second resistance R 2 and 1 parallel connection of said first capacitor C; And the end after the parallel connection links to each other with Vcc, common No. 2 input ports that insert said single-chip microcomputer IC of the end of the other end and said temperature sensor RT, the other end ground connection of said temperature sensor RT.Said alert circuit comprises light-emitting diode display, and said light-emitting diode display and said single-chip microcomputer IC No. 3, No. 4 link to each other with No. 5 output ports.
When water quality was good, the resistance of water quality sensor R was bigger, and Vcc is through the dividing potential drop of the water quality sensor R and first resistance R 1, and is lower at the voltage of single-chip microcomputer IC1 input port; When water quality bad time, the resistance of water quality sensor R is less, and Vcc is through the dividing potential drop of the water quality sensor R and first resistance R 1, and is higher at the voltage of No. 1 input port of single-chip microcomputer IC.The i.e. lower voltage of water quality correspondence preferably, the corresponding higher voltage of relatively poor water quality.When water temperature was higher, the resistance of temperature sensor RT was less, and Vcc is through the dividing potential drop of second resistance R 2 and temperature sensor RT, and is less at the voltage of No. 2 input ports of single-chip microcomputer IC; When water temperature was low, the resistance of temperature sensor RT was bigger, and Vcc is through the dividing potential drop of second resistance R 2 and temperature sensor RT, and is bigger at the voltage of No. 2 end inbound ports of single-chip microcomputer IC.First capacitor C 1 is done filtering and is used.The higher lower voltage of temperature correspondence.Analog to digital conversion circuit among the single-chip microcomputer IC carries out analog-to-digital conversion to the signal of No. 1 input port and No. 2 input port inputs; The temperature-compensating computing is carried out by temperature compensation module in the conversion back; The value after the temperature-compensating computing and a reference value of setting are compared by comparison module; Start corresponding timing circuit timing according to different comparative results, start led pipe corresponding in the alert circuit after timing is accomplished and light, remind the fouling degree of the present water heater of user.
When water quality was relatively poor, in the short period of time such as 2 years, the full level of single-chip microcomputer delivery outlet 3 that makes after 2 years of timing was uprised by low, lights first LED pipe; After first LED pipe was lighted, the single-chip microcomputer zero clearing was relatively judged again, if the water quality of relatively judging as a result is still relatively poor, then in the short period of time such as 1 year bright second LED pipe of the least bit; After second LED pipe lighted, single-chip microcomputer is zero clearing once more, relatively judged again, if water quality is also relatively poor, then within 1 year, lighted the 3rd LED pipe in the short period of time.When three LED manage all when bright, explain that the fouling degree of water heater liner is very serious, inner bag faces the risk of corrosion, and the protection anode stub will run out of, and the caution user need remove incrustation scale, change anode stub, and needs to clean water heater.Better when water quality, such as 3 years, the full level of single-chip microcomputer delivery outlet 3 that makes after 3 years of timing was uprised by low, lights first LED pipe in the long time; If water quality still is relatively good, the level that then makes single-chip microcomputer delivery outlet 4 from low to high, in the long time such as 2 years; Second LED pipe completely lighted in timing after 2 years; And the like, until lighting the 3rd LED pipe, compare water quality relatively poor use water environment; The cycle of the time limit of fouling, degree, cleaning water heater is all longer relatively, reduces the waste of manpower and financial resources.Make the operating position of the present water heater of the clearer understanding of user, the fouling degree, and whether need clean water heater.
In above-mentioned preferred version, said water quality sensor comprises two first detecting electrodes that correspond to each other and second detecting electrode, and said temperature sensor RT is a resistance temperature detector.In order to guarantee that deviation does not appear in a reference value, cause relatively judging deviation occurring that the area of said first detecting electrode and second detecting electrode is identical, relative distance is fixed, and does not change.
In above-mentioned preferred version; Water quality sensor R installs in the inner bag; And be positioned at the bottom of inner bag; To reduce the interference that overheated water temperature detects water quality sensor as far as possible, the temperature-compensation circuit in the water monitoring device can further be proofreaied and correct because temperature contrast changes the detection that causes and lose accurate situation.Said temperature sensor RT is located in the said inner bag or on the wall of inner container, in the present embodiment, temperature sensor is located in the inner bag, and near the water quality sensor setting, loses the condition of agreeing to do a favour so that better proofread and correct water quality sensor because of the detection that water temperature variation on every side causes.
Claims (12)
1. water heater that possesses fouling warning deixis; Comprise shell (1), inner bag, the water inlet (2) that is communicated with said inner bag and delivery port (3), heater, temperature sensor and controller; Said controller comprises signal pre-processing circuit, signaling conversion circuit, single-chip microcomputer (IC) and warning indicator, it is characterized in that:
Be provided with water quality sensor (R) and temperature compensation sensor (RT) in the said inner bag, said temperature compensation sensor (RT) be located at said water quality sensor (R) around;
Said water quality sensor and temperature compensation sensor input to said signal pre-processing circuit with water quality signal and temperature compensation signal and handle; Signal after said signal pre-processing circuit will be handled inputs to said signaling conversion circuit and carries out the signal conversion, and the signal after the conversion inputs to said single-chip microcomputer (IC);
Said single-chip microcomputer (IC) comprises temperature compensation module, timing module; Said temperature compensation module compensates computing according to the temperature compensation signal value of input to the water quality signal value; The signal value of said timing module after according to compensation operation starts the time-count cycle of corresponding duration; Output by said single-chip microcomputer after said timing time-count cycle is accomplished outputs control signals to said warning indicator startup work, reminds the foul of user's water heater.
2. water heater according to claim 1 is characterized in that: the signal value behind the compensation operation is corresponding one by one with time-count cycle, the time-count cycle of the corresponding different durations of the signal value of different sizes.
3. water heater according to claim 1; It is characterized in that: said single-chip microcomputer (IC) also comprises the accumulation computing module; Said single-chip microcomputer reads water quality signal and temperature compensation signal by the cycle; Accumulate stack by the signal value of said accumulation computing module after after the temperature compensated computing to compensation operation; The signal that the output of said single-chip microcomputer will be accumulated stack exports said warning indicator to, by the form demonstration accumulation stack amount of said warning indicator with block diagram or cake chart, comes the fouling accumulation situation of display water heater with this.
4. water heater according to claim 1; It is characterized in that: said single-chip microcomputer (IC) is in each cycle; Repeatedly read water quality signal and temperature compensation signal; Averaged by said accumulation computing module after the temperature compensated computing, said accumulation computing module is accumulated stack to the mean value in each cycle, and the signal that the output of said single-chip microcomputer will be accumulated stack exports said warning indicator to; By the form demonstration accumulation stack amount of said warning indicator with block diagram or cake chart, the fouling accumulation situation of coming display water heater successively.
5. according to claim 3 or 4 described water heaters; It is characterized in that: said accumulation computing module is provided with a reference value; When said accumulation superposition during more than or equal to said a reference value; The output of said single-chip microcomputer outputs control signals to said warning indicator, and the block diagram or the cake chart that make said warning indicator be by red display, and/or sends sound and light alarm.
6. water heater according to claim 5 is characterized in that: when said accumulation superposition during more than or equal to said a reference value, the accumulation stack computing of next round is carried out in said single-chip microcomputer (IC) zero clearing.
7. water heater according to claim 1; It is characterized in that: said single-chip microcomputer (IC) also comprises comparison module; Value and the preset reference value of said comparison module after to compensation operation compares: the value relatively is greater than a; Then timing module started for first time-count cycle, and the timing time of said first time-count cycle is J; Or the value relatively more than or equal to b smaller or equal to a, then timing module started for second time-count cycle, the timing time of said second time-count cycle is K; Or the value relatively is less than b; Then timing module started for the 3rd timing cycle; The timing time in said the 3rd timing cycle is L; Said J＞K＞L, the output by said single-chip microcomputer after said first time-count cycle or second time-count cycle or the timing of the 3rd timing cycle are accomplished outputs control signals to said warning indicator startup work, reminds the foul of user's water heater.
8. according to claim 1 or 3 or 4 or 7 described water heaters; It is characterized in that: said signal pre-processing circuit comprises the water quality detection circuit; Temperature-compensation circuit; Said water quality detection circuit detects the resistance signal of water and changes voltage signal into through water quality sensor (R) and inputs to said signaling conversion circuit, and said temperature-compensation circuit detects the temperature signal of water and changes voltage signal into through said temperature sensor (RT) and inputs to said signaling conversion circuit.
9. water heater according to claim 8 is characterized in that: said water quality sensor is positioned at the middle part or the bottom of said inner bag.
10. according to claim 1 or 3 or 4 or 7 described water heaters; It is characterized in that: said water quality detection circuit also comprises first resistance (R1); One end ground connection of said first resistance (R1); One end of said water quality sensor (R) is connected with Vcc, and the other end of the other end of said first resistance (R1) and said water quality sensor (R) together inserts No. 1 input port of said single-chip microcomputer (IC); Said temperature-compensation circuit also comprises second resistance (R2) and first electric capacity (C1); Said second resistance (R2) and said first electric capacity (C1) parallel connection; And the end after the parallel connection links to each other with Vcc, common No. 2 input ports that insert said single-chip microcomputer (IC) of an end of the other end and said temperature sensor (RT), the other end ground connection of said temperature sensor (RT).
11. according to claim 1 or 3 or 4 or 7 described water heaters, it is characterized in that: said single-chip microcomputer (IC) also comprises the flash memory, stores the signal in the said single-chip microcomputer.
12. water heater according to claim 7 is characterized in that: the signal relatively, its voltage is below 20% of single-chip microcomputer (IC) supply voltage, and then timing module started for first time-count cycle, and the timing time of said first time-count cycle is J; Or the signal relatively, its voltage single-chip microcomputer (IC) supply voltage 20% to 40% between, then timing module started for second time-count cycle, the timing time of said second time-count cycle is K; Or the signal relatively, its voltage is at more than 40% of single-chip microcomputer (IC) supply voltage, and then timing module started for the 3rd timing cycle, and the timing time in said the 3rd timing cycle is L, said J＞K＞L.
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| CN2010102631113A CN102374662B (en) | 2010-08-20 | 2010-08-20 | Water heater with scaling alarming indication function |
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| WO2015081752A1 (en) * | 2013-12-03 | 2015-06-11 | 芜湖美的厨卫电器制造有限公司 | Cleaning control apparatus and cleaning control method for electric water heater |
| CN105546830A (en) * | 2015-12-31 | 2016-05-04 | 天津市嘉尔屹科技发展有限公司 | Electric water heater water scale early warning device based on specific resistance measurement |
| CN106468479A (en) * | 2015-08-18 | 2017-03-01 | 青岛经济技术开发区海尔热水器有限公司 | The control method of electric heater and electric heater |
| CN109520135A (en) * | 2018-09-26 | 2019-03-26 | 中山市恒乐电器有限公司 | A kind of scale precipitation equipment and water heater |
| CN110794100A (en) * | 2018-08-02 | 2020-02-14 | 青岛海尔洗衣机有限公司 | Water quality detection device and control method thereof |
| CN111000420A (en) * | 2019-11-25 | 2020-04-14 | 杭州老板电器股份有限公司 | Automatic cleaning device and method and cooking appliance |
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| CN104516285A (en) * | 2013-09-26 | 2015-04-15 | 樱花卫厨（中国）股份有限公司 | Electric water heater water quality detection control circuit |
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