CN104075454A - Water heater water leakage detection method - Google Patents
Water heater water leakage detection method Download PDFInfo
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- CN104075454A CN104075454A CN201310108113.9A CN201310108113A CN104075454A CN 104075454 A CN104075454 A CN 104075454A CN 201310108113 A CN201310108113 A CN 201310108113A CN 104075454 A CN104075454 A CN 104075454A
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Abstract
The invention discloses a water heater water leakage detection method. The characteristics of a temperature sensor that the resistance changes when the temperature changes and heat consumption speed is different in different mediums are utilized to detect whether the temperature sensor is located in the water or air so as to judge whether water in the water heater leaks or not. By utilizing the temperature characteristics of a negative temperature coefficient sensor, a controller sends signals to control the main power supply to switch on and off and an electromagnetic valve to open and close, the effect of switching off the power supply and closing the electromagnetic valve can be achieved when the water leakage is detected, and personal safety and property safety for users are guaranteed.
Description
Technical field
The invention belongs to technical field of water heaters, specifically, relate to a kind of water leakage detection device for water heater and detection method.
Background technology
At present water heater having arrived widely used, but because water heater installation environment is moister, add the corrosion of water to inner bag, if, magnesium rod can not be changed in time, of long duration likely occurs drainage, may have water if add water heater control panel, can cause whole control panel to be scrapped, even there will be some dangerous situations.If discovery that can be as early as possible, can avoid these losses.
The inner bag of water heater is all welding fabrication, generally has the welding of vertical masonry joint, circumferential weld.For the water heater that is built-in with electrothermal tube, its electrothermal tube, with the flange of fastening use, can add fastening putting in place of seal gasket again by the flange on inner bag.The inner bag of water heater, because the environment of the aging of welding procedure, rubber cushion and work itself is the impact of the factors such as artesian condition, in use there will be the situation of leaking unavoidably.
The inspection of leaking for inner bag mainly concentrates on the inspection of water heater before dispatching from the factory, once after user family, user can only discover water heater liner by naked eyes whether leakage has occurred, and in the time leaking, takes corresponding power-off, the measure such as reports for repairment.But, owing to visually observing the limitation that itself exists subjective observation ability and judgement, be difficult for finding in time water leakage fault, and, if user does not check more to find whether occurred to leak in time.And because water heater is generally connected with tap water pipe line, if occurred that inner bag leaks and long period man in unmanned, easily cause ponding, even there is electrical safety accident.
Application number is 200820006351.3 utility model, the electric heater that a kind of water leakage alarm is cut off the water supply is disclosed, its feature is: ponding pallet is equipped with in electric heater bottom, in ponding pallet, be equipped with a pair of or a pair of with top electrode, a water inlet controller is equipped with at water inlet pipe place, is connected the water leakage of signal processor collecting electrode between electrode or water inlet controller and signal processor by signal control line, sending sound can report to the police by light, and sends to water inlet controller the signal of cutting off the water supply.Electric heater can not only be cut off the water supply, and prevents from leaking for a long time, and can send sound or light alarm user, fixes a breakdown in time.This structure need to be leaked a large amount of water at water heater and just can be reported to the police, and therefore its sensitivity is not high, is difficult to realize and the object of alarm.
Application number is the leakage inspector that 200920273836.3 utility model discloses a kind of water heater.It is characterized in that it comprises that one or several are located at capacitance detecting contact, this capacitance detecting contact is connected with earth connection, the capacitance signal output of capacitance detecting contact is connected with a capacitive detection circuit, this capacitive detection circuit is connected with a microprocessor, and microprocessor is provided with a warning device.This structure only has drip on electric capacity contact during when leaking, and the plates capacitance forming between electric capacity contact and ground changes, and capacitive detection circuit obtains after this signal, and this signal is sent to microprocessor.Sensitivity and promptness are weak.
Application number is that 201120238512.3 utility model discloses a kind of water leakage detection device for electromagnetic water heater, it is made up of base plate, probe and resistance, base plate adopts insulating materials to make, two probes are welded in respectively the two ends of resistance, lead-in wire a, the b at resistance two ends receives respectively on two interfaces of CPU, base plate by screw fastening in electromagnet water heater housing bottom.The present invention is arranged at the bottom of electromagnet water heater, once the inner drainage that occurs of electromagnet water heater can be detected by this device, and cut off the electricity supply immediately by CPU, thereby can guarantee the use safety of electromagnet water heater.The practical CPU of this structure, consumptive material is larger, and cost is higher, and can only be used in the water heater of electromagnetic type.
The disclosure of the invention of application number 200910033981.9 a kind of water heater, it comprises the inner bag for accommodating a certain amount of heated water, be communicated with to transmit with described inner bag the water inlet pipe and the outlet pipe that flow into inner bag and flow out the water of inner bag, for the thermal source of the water in heating inner liner, and the audio frequency detector of the audio frequency causing for detection of leaking due to inner bag variation.Owing to having adopted audio frequency detector, once inner bag leaks, just can detect in time that corresponding audio frequency changes, thereby take appropriate measures the impact that reduces to cause to surrounding environment owing to leaking.Due to long use, in water heater liner, have rusty stain or incrustation scale, these all can make the audio frequency detecting of audio frequency detector change, and make to detect the result of leaking not accurate enough.
Summary of the invention
Whether the object of this invention is to provide a kind of water heater that can accurately detect leaks also and the water leakage detection device for water heater of alarm.
Another object of the present invention is to provide a kind of characteristic of utilizing sensor itself, accurately detects the detection method whether water heater leaks.
For reaching above object, the technical solution used in the present invention is: a kind of water heater detection method of leaking, it is characterized in that: the water leg bottom below the inner bag of water heater arranges the temperature sensor of energising, the current-limiting resistance of temperature sensor is less, make the heating of temperature sensor self higher, the temperature value of measuring is higher than actual value, leak temperature sensor is immersed in the water, because different with the dissipative velocity of heat in air in water, cause because the temperature sensor after energising is different with airborne resistance value in the water under same temperature, and cause the variation of temperature sensor output parameter, the controller of water heater is by the variation of detected temperatures sensor output parameter, judge whether water heater liner leaks.
Be the magnitude of voltage U of temperature sensor by the output parameter of temperature sensor
nor the resistance value R of temperature sensor
nor self temperature T of the rate of change Δ T of temperature sensor self temperature or temperature sensor
ndifference DELTA T with environment temperature T
1signal transfers in water heater controller.
The water leakage scope arranging in the output signal of controller reduced temperature sensor and controller, if output signal belongs in the scope of water leakage, controller sends the instruction of leaking.
Described water leakage scope is the magnitude of voltage U of water heater temperature sensor while leaking
nor the resistance value R of temperature sensor
nor self temperature T of the rate of change Δ T of temperature sensor self temperature or temperature sensor
ndifference DELTA T with environment temperature T
1scope.
The described instruction of leaking comprises the main power source of closing water heater, closes the magnetic valve at heater inleting pipe place, sends alarm signal.
Described output parameter is U
ntime, water leakage scope be 330I to 1020I or 330U/ (R+330) to 1020U/ (R+1020), the signal R of described signal end output
ntime, water leakage scope is 330 to 1020, and when the signal of described signal end output is Δ T, water leakage scope is 0.5 to 40, and the signal of described signal end output is Δ T
1time, water leakage scope is 0 to 1.
Described I is the constant current value of temperature sensor place power supply, and described U is the constant voltage values of temperature sensor place power supply, and described R is the resistance value of a divider resistance of temperature sensor series connection.
A kind of water heater detection method of leaking, is characterized in that: comprise the steps:
1) temperature sensor place circuit transfers to the output parameter of temperature sensor in controller;
2) controller judges whether the output parameter of detection signal end belongs to water leakage scope;
3) when output signal belongs to water leakage scope, controller sends the instruction of cutting out water heater power supply, by the power-off of water heater, sends the instruction of shut electromagnetic valve simultaneously, closes heater inleting pipe's magnetic valve;
4) signal does not belong to while leaking scope, and controller sends water heater and continues the order-driven water heater operation moving.
A kind of water heater of the present invention detection method of leaking, can utilize the characteristic of sensor itself, accurately detect whether water heater leaks and and alarm cut off water inlet and the main power source of water heater, protection user's the person and property safety.
Brief description of the drawings
Fig. 1 is a kind of water heater of the present invention device of detection method scheme of installation on water heater that leaks;
Fig. 2 is the leak device circuit schematic diagram of detection method of a kind of water heater of the present invention;
Fig. 3 is a kind of temperature sensor temperature characterisitic schematic diagram of employing of the present invention;
Fig. 4 is the leak device circuit schematic diagram of detection method of a kind of water heater of the present invention.
Fig. 5 is the another kind of water heater of the present invention device of the detection method scheme of installation on water heater that leaks;
Fig. 6 is the leak circuit diagram of device of detection method of a kind of water heater shown in Fig. 5;
Fig. 7 be a kind of water heater of the present invention leak detect method flow diagram;
1, inner bag 2, middle bucket 3, end socket 4, controller 5, V-type groove 6, temperature sensor 7, water inlet pipe 8, magnetic valve 9, heating tube 10, outlet pipe 11, signal end 12, the second temperature sensor
Detailed description of the invention
A kind of water heater detection method of leaking, water leg bottom below the inner bag of water heater arranges the temperature sensor of energising, because the temperature sensor after energising is different with airborne resistance value in the water under same temperature, and cause the variation of temperature sensor output parameter, the controller of water heater, by the variation of detected temperatures sensor output parameter, judges whether water heater liner leaks.In circuit, be provided with the signal end of output temperature sensor output parameter, output parameter comprises the magnitude of voltage U of temperature sensor
nor resistance value R
nor the signal end of the changing value Δ T of temperature sensor self temperature within the unit interval, or the difference DELTA T of temperature sensor self temperature and environment temperature
1, circuit is connected with controller by signal end.
Below in conjunction with accompanying drawing, a kind of water leakage detection device for water heater of the present invention is described in detail: as shown in accompanying drawing 1 and accompanying drawing 5, be arranged on the structural representation in water heater for water leakage detection device for water heater of the present invention.Inner bag 1 bottom of water heater is provided with V-type groove 5, and V-type groove 5 is arranged on outer cover of water heater inside, and the opening of V-type groove 5 is arranged on water heater liner 1 bottom, and the end on two limits of openend is connected with liner end enclosure 3.The inner surface of V-type groove 5 is smooth not to get wet, facilitate water droplet or current to flow in passing the lowermost end of V-type groove 5, like this, clearance leakage between heating tube 9 on the middle bucket 2 of inner bag and seam crossing or the end socket of liner end enclosure 3 and heating tube flange or between heating tube flange and end socket 3, water droplet flow to the bottommost of V-type groove along the outer wall of end socket or the inner surface of V-type groove.Be provided with magnetic valve at heater inleting pipe place, by the switching of controller control magnetic valve.
Embodiment mono-:
V-type groove 5 bottoms arrange a kind of water leakage detection device for water heater of the present invention, comprise a temperature sensor circuit that is connected to power supply, the signal end of promising signal supervisory instrument 11 is set on circuit, be connected with the controller 4 of water heater, on the water inlet pipe 7 of water heater, be provided with a control heater inleting pipe's who is connected with controller 4 magnetic valve 8, be illustrated in figure 2 the circuit diagram of a kind of water leakage detection device for water heater of the present invention, in order to ensure the safety of circuit, in circuit, arrange one and jointly share the resistance R of voltage U with temperature sensor 6, the resistance value ratio temperature sensor R of resistance R
nresistance is at normal temperatures little.
The power supply of circuit is set to the power supply of fixed voltage, other components that are in temperature sensor 6 and circuit provide stable fixed voltage U, because current-limiting resistance R resistance is less, make temperature sensor self-heating, the temperature value of detection is much larger than actual environment temperature.Generation current in circuit, temperature sensor 6 itself is resistance, and negative temperature coefficient sensor is the resistance value of sensor self and the temperature sensor that temperature is inversely proportional to, and temperature raises, the resistance value R of sensor
nreduce, temperature reduces, and the temperature of sensor self raises, resistance value R
nreduce.Also have in addition a characteristic, heat is different with airborne diffusion velocity in water, like this, and the sensor electrical resistance R in water when temperature is identical in air
nnot identical, if leaked, temperature sensor is immersed in water, the temperature detecting can have greatly changed as shown in Figure 3 be that a kind of negative temperature coefficient sensor of adopting of the present invention is in water and airborne resistance value R
nand the functional relation schematic diagram between temperature.
On the circuit of water leakage detection device for water heater, be provided with signal end, signal end is the magnitude of voltage U at detected temperatures sensor two ends
ndetector, detector transfers to output signal in controller.In controller, be provided with the signal spacing that water heater leaks, the interval that leaks of the voltage signal in the present embodiment is: [330U/ (R+330), 1020U/ (R+1020)].
After giving power on circuitry, the detector of circuit output end will detect voltage signal U
nvalue be transferred to controller, controller judges magnitude of voltage U
nwhether belong to interval [330U/ (R+330), 1020U/ (R+1020)], if controller judges the output signal of detector and belongs in water leakage interval, water heater liner leaks, controller sends instruction, close the main power source of water heater, shut electromagnetic valve simultaneously, forbids the continuation water inlet of water heater.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can ensure like this user's who is using water heater personal safety, can also cut off the water supply, avoid leaking always, cause that the waste of water resource and the property to user cause damage.
Embodiment bis-:
V-type groove 5 bottoms arrange a kind of water leakage detection device for water heater of the present invention, comprise a temperature sensor circuit that is connected to power supply, on circuit, be provided with signal end, be connected with the controller of water heater, on the water inlet pipe of water heater, be provided with a control heater inleting pipe's who is connected with controller magnetic valve, be illustrated in figure 2 the circuit diagram of a kind of water leakage detection device for water heater of the present invention, in order to ensure the safety of circuit, in circuit, arrange one and jointly share the resistance R of voltage U, the resistance value ratio temperature sensor R of resistance R with temperature sensor
nresistance is at normal temperatures large.
The power supply of circuit is set to the power supply of fixed voltage, other components that are in temperature sensor 6 and circuit provide stable fixed voltage U, because current-limiting resistance R resistance is less, make temperature sensor self-heating, the temperature value of detection is much larger than actual environment temperature.Generation current in circuit, temperature sensor 6 itself is resistance, and negative temperature coefficient sensor is the resistance value of sensor self and the temperature sensor that temperature is inversely proportional to, and temperature raises, the resistance value R of sensor
nreduce, temperature reduces, and the temperature of sensor self raises, resistance value R
nreduce.Also have in addition a characteristic, heat is different with airborne diffusion velocity in water, like this, and the sensor electrical resistance R in water when temperature is identical in air
nnot identical, if leaked, temperature sensor is immersed in water, the temperature detecting can have greatly changed as shown in Figure 3 be that a kind of negative temperature coefficient sensor of adopting of the present invention is in water and airborne resistance value R
nand the functional relation schematic diagram between temperature.
On the circuit of water leakage detection device for water heater, be provided with signal end, signal end is the resistance value R at detected temperatures sensor two ends
ndetector, detector transfers to output signal in controller 4.In controller, be provided with the signal spacing that water heater leaks, the interval that leaks of the resistance value signal in the present embodiment is: [330,1020].
After giving power on circuitry, the detector 11 of circuit output end will detect resistance signal R
nvalue be transferred to controller 4, controller judges resistance value R
nwhether belong to interval [330,1020], belong in water leakage interval if controller judges the output signal of detector, water heater liner leaks, and controller sends instruction, closes the main power source of water heater, shut electromagnetic valve simultaneously, forbids the continuation water inlet of water heater.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can ensure like this user's who is using water heater personal safety, can also cut off the water supply, avoid leaking always, cause that the waste of water resource and the property to user cause damage.
Embodiment tri-:
V-type groove 5 bottoms arrange a kind of water leakage detection device for water heater of the present invention, comprise a temperature sensor circuit that is connected to power supply, on circuit, be provided with signal end, be connected with the controller 4 of water heater, on the water inlet pipe 7 of water heater, be provided with a control heater inleting pipe's who is connected with controller magnetic valve, be illustrated in figure 4 the circuit diagram of a kind of water leakage detection device for water heater of the present invention, in order to ensure the safety of circuit, in circuit, arrange one and jointly share the resistance R of voltage, the resistance value ratio temperature sensor R of resistance R with temperature sensor
nresistance is at normal temperatures large.
The power supply of circuit is set to the power supply of fixed current, other components that are in temperature sensor and circuit provide stable fixed current I, as shown in Figure 4, because of current-limiting resistance R resistance less, make temperature sensor self-heating, the temperature value of detection is much larger than actual environment temperature.Generation current in circuit, temperature sensor 6 itself is resistance, and negative temperature coefficient sensor is the resistance value of sensor self and the temperature sensor that temperature is inversely proportional to, and temperature raises, the resistance value R of sensor
nreduce, temperature reduces, and the temperature of sensor self raises, resistance value R
nreduce.Also have in addition a characteristic, heat is different with airborne diffusion velocity in water, like this, and the sensor electrical resistance R in water when temperature is identical in air
nnot identical, if leaked, temperature sensor is immersed in water, as shown in Figure 3 be that a kind of negative temperature coefficient sensor of adopting of the present invention is in water and airborne resistance value R
nand the functional relation schematic diagram between temperature.
On the circuit of water leakage detection device for water heater, be provided with signal end, signal end is the resistance value R at detected temperatures sensor two ends
ndetector, detector transfers to output signal in controller.In controller, be provided with the signal spacing that water heater leaks, the interval that leaks of the resistance value signal in the present embodiment is: [330,1020].
After giving power on circuitry, the detector of circuit output end will detect resistance signal R
nvalue be transferred to controller, controller judges resistance value R
nwhether belong to interval [330,1020], belong in water leakage interval if controller judges the output signal of detector, water heater liner leaks, and controller sends instruction, closes the main power source of water heater, shut electromagnetic valve simultaneously, forbids the continuation water inlet of water heater.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can ensure like this user's who is using water heater personal safety, can also cut off the water supply, avoid leaking always, cause that the waste of water resource and the property to user cause damage.
Embodiment tetra-:
V-type groove 5 bottoms arrange a kind of water leakage detection device for water heater of the present invention, comprise a temperature sensor circuit that is connected to power supply, on circuit, be provided with signal end, be connected with the controller 4 of water heater, on the water inlet pipe 7 of water heater, be provided with a control heater inleting pipe's who is connected with controller 4 magnetic valve 8, be illustrated in figure 4 the circuit diagram of a kind of water leakage detection device for water heater of the present invention, in order to ensure the safety of circuit, in circuit, arrange one and jointly share the resistance R of voltage, the resistance value ratio temperature sensor R of resistance R with temperature sensor
nresistance is at normal temperatures large.
The power supply of circuit is set to the power supply of fixed current, other components that are in temperature sensor and circuit provide stable fixed current I, as shown in Figure 4, because of current-limiting resistance R resistance less, make temperature sensor self-heating, the temperature value of detection is much larger than actual environment temperature.Generation current in circuit, temperature sensor 6 itself is resistance, and negative temperature coefficient sensor is the resistance value of sensor self and the temperature sensor that temperature is inversely proportional to, and temperature raises, the resistance value R of sensor
nreduce, temperature reduces, and the temperature of sensor self raises, resistance value R
nreduce.Also have in addition a characteristic, heat is different with airborne diffusion velocity in water, like this, and the sensor electrical resistance R in water when temperature is identical in air
nnot identical, if leaked, temperature sensor is immersed in water, as shown in Figure 3 be that a kind of negative temperature coefficient sensor of adopting of the present invention is in water and airborne resistance value R
nand the functional relation schematic diagram between temperature.
On the circuit of water leakage detection device for water heater, be provided with signal end, signal end is the magnitude of voltage U at detected temperatures sensor two ends
ndetector, detector transfers to output signal in controller.In controller, be provided with the signal spacing that water heater leaks, the interval that leaks of the voltage signal in the present embodiment is: [330U/ (R+330), 1020U/ (R+1020)].
After giving power on circuitry, the detector of circuit output end will detect voltage signal U
nvalue be transferred to controller, controller judges magnitude of voltage U
nwhether belong to interval [330U/ (R+330), 1020U/ (R+1020)], if controller judges the output signal of detector and belongs in water leakage interval, water heater liner leaks, controller sends instruction, close the main power source of water heater, shut electromagnetic valve simultaneously, forbids the continuation water inlet of water heater.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can ensure like this user's who is using water heater personal safety, can also cut off the water supply, avoid leaking always, cause that the waste of water resource and the property to user cause damage.
Embodiment five:
V-type groove 5 bottoms arrange a kind of water leakage detection device for water heater of the present invention, comprise temperature sensor 6 circuit that are connected to power supply, on circuit, be provided with signal end, be connected with the controller 4 of water heater, on the water inlet pipe 7 of water heater, be provided with a control heater inleting pipe's who is connected with controller 4 magnetic valve 8, be illustrated in figure 5 the circuit diagram of a kind of water leakage detection device for water heater of the present invention, in order to ensure the safety of circuit, in circuit, arrange one and jointly share the resistance R of voltage U, the resistance value ratio temperature sensor R of resistance R with temperature sensor
nresistance is at normal temperatures large.
Be provided with the temperature signal efferent duct of the second temperature sensor 12, the second temperature sensors 12 and the temperature signal output of temperature sensor is all connected with controller in a side of temperature sensor 6 as shown in Figure 5, temperature signal is transferred on controller.Shown in Fig. 6 is the circuit diagram of the water leakage detection device for water heater of the present embodiment.
Controller 4 is the difference of the temperature signal of accounting temperature sensor 6 and the temperature signal of the second temperature sensor 12 first, then itself and the built-in temperature signal scope of leaking are contrasted, judge that whether difference is in the temperature signal scope inside that leaks, if controller judges difference and belongs in water leakage interval, the water leakage interval arranging on controller 4 is [0.5,40] (unit be degree Celsius), water heater liner leaks, controller 4 sends instruction, close the main power source of water heater, shut electromagnetic valve simultaneously, forbids the continuation water inlet of water heater.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can ensure like this user's who is using water heater personal safety, can also cut off the water supply, avoid leaking always, cause that the waste of water resource and the property to user cause damage.
Embodiment six:
V-type groove 5 bottoms arrange a kind of water leakage detection device for water heater of the present invention, comprise a temperature sensor circuit that is connected to power supply, on circuit, be provided with signal end, be connected with the controller 4 of water heater, on the water inlet pipe 7 of water heater, be provided with a control heater inleting pipe's who is connected with controller magnetic valve, be illustrated in figure 4 the circuit diagram of a kind of water leakage detection device for water heater of the present invention, in order to ensure the safety of circuit, in circuit, arrange one and jointly share the resistance R of voltage, the resistance value ratio temperature sensor R of resistance R with temperature sensor
nresistance is at normal temperatures large.
The signal of signal output part output is the temperature of temperature sensor self the changing value Δ T within the unit interval, transmit signals in controller, in controller, the scope of built-in water leakage is [0,1], and controller detects Δ T whether within the scope of water leakage, if Δ T belongs to water leakage scope, water heater liner leaks, and controller sends instruction, closes the main power source of water heater, shut electromagnetic valve simultaneously, forbids the continuation water inlet of water heater.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can ensure like this user's who is using water heater personal safety, can also cut off the water supply, avoid leaking always, cause that the waste of water resource and the property to user cause damage.
In above-described embodiment, a kind of water heater detection method of leaking, comprises the steps:
1) stabilized power source provides power supply to temperature sensor, the resistance that the resistance of the dividing potential drop of connecting on temperature sensor is R;
2) temperature sensor produces heat under the effect of electric current, and the temperature value of detection is higher than actual value, and the resistance value of temperature sensor self declines;
3) signal end is sent to loop output signal the controller of water heater, the magnitude of voltage U that output signal is temperature sensor
nor resistance value R
nor the changing value Δ T of temperature sensor self temperature within the unit interval or the temperature T of temperature sensor self
ndifference DELTA T with environment temperature T
1;
4) controller judges whether the output signal of detection signal end belongs to water leakage scope, and the output signal of output end signal end is U
ntime, water leakage scope is [330I, 1020I] or [330U/ (R+330), 1020U/ (R+1020)], the signal R of described signal end output
ntime, water leakage scope is [330,1020], and when the signal of described signal end output is Δ T, water leakage scope is [0.5,40], and the signal of described signal end output is Δ T
1time, water leakage scope is [0,1];
5) when output signal belongs to water leakage scope, controller sends the instruction of cutting out water heater power supply, by the power-off of water heater, sends the instruction of shut electromagnetic valve simultaneously, closes heater inleting pipe's magnetic valve;
6) signal does not belong to while leaking scope, and controller sends water heater and continues the order-driven water heater operation moving.
Embodiment in above-described embodiment can further combine or replace; and embodiment is described the preferred embodiments of the present invention; not the spirit and scope of the present invention are limited; do not departing under the prerequisite of design philosophy of the present invention; the various changes and modifications that in this area, professional and technical personnel makes technical scheme of the present invention, all belong to protection scope of the present invention.
Claims (8)
1. the water heater detection method of leaking, it is characterized in that: the water leg bottom below the inner bag of water heater arranges the temperature sensor of energising, because the temperature sensor after energising is different with airborne resistance value in the water under same temperature, and cause the variation of temperature sensor output parameter, the controller of water heater, by the variation of detected temperatures sensor output parameter, judges whether water heater liner leaks.
2. a kind of water heater according to claim 1 detection method of leaking, is characterized in that: be the magnitude of voltage U of temperature sensor by the output parameter of temperature sensor
nor the resistance value R of temperature sensor
nor self temperature T of the rate of change Δ T of temperature sensor self temperature or temperature sensor
ndifference DELTA T with environment temperature T
1signal transfers in water heater controller.
3. a kind of water heater according to claim 2 detection method of leaking, it is characterized in that: the water leakage scope arranging in the output signal of controller reduced temperature sensor and controller, if output signal belongs in the scope of water leakage, controller sends the instruction of leaking.
4. a kind of water heater according to claim 3 detection method of leaking, is characterized in that: described water leakage scope is the magnitude of voltage U of water heater temperature sensor while leaking
nor the resistance value R of temperature sensor
nor self temperature T of the rate of change Δ T of temperature sensor self temperature or temperature sensor
ndifference DELTA T with environment temperature T
1scope.
5. a kind of water heater according to claim 3 detection method of leaking, is characterized in that: the described instruction of leaking comprises the main power source of closing water heater, closes the magnetic valve at heater inleting pipe place, sends alarm signal.
6. a kind of water heater according to claim 4 detection method of leaking, is characterized in that: described output parameter is U
ntime, water leakage scope be 330I to 1020I or 330U/ (R+330) to 1020U/ (R+1020), the signal R of described signal end output
ntime, water leakage scope is 330 to 1020, and when the signal of described signal end output is Δ T, water leakage scope is 0.5 to 40, and the signal of described signal end output is Δ T
1time, water leakage scope is 0 to 1.
7. a kind of water heater according to claim 6 detection method of leaking, it is characterized in that: described I is the constant current value of temperature sensor place power supply, described U is the constant voltage values of temperature sensor place power supply, and described R is the resistance value of a divider resistance of temperature sensor series connection.
8. according to the detection method of leaking of a kind of water heater described in any one in claim 1-7, it is characterized in that: comprise the steps:
1) temperature sensor place circuit transfers to the output parameter of temperature sensor in controller;
2) controller judges whether the output parameter of detection signal end belongs to water leakage scope;
3) when output signal belongs to water leakage scope, controller sends the instruction of cutting out water heater power supply, by the power-off of water heater, sends the instruction of shut electromagnetic valve simultaneously, closes heater inleting pipe's magnetic valve;
4) signal does not belong to while leaking scope, and controller sends water heater and continues the order-driven water heater operation moving.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314875A (en) * | 2016-04-27 | 2017-11-03 | 付斌 | Underwater installation leakage detection method |
| CN108679851A (en) * | 2018-06-13 | 2018-10-19 | 广东万家乐燃气具有限公司 | A kind of anticreep water leakage control system and water heater |
| CN108716775A (en) * | 2018-06-04 | 2018-10-30 | 广东万家乐燃气具有限公司 | Water heater and water system |
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| CN108716775A (en) * | 2018-06-04 | 2018-10-30 | 广东万家乐燃气具有限公司 | Water heater and water system |
| CN108679851A (en) * | 2018-06-13 | 2018-10-19 | 广东万家乐燃气具有限公司 | A kind of anticreep water leakage control system and water heater |
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