CN104075453A - Water heater water leakage detection device - Google Patents
Water heater water leakage detection device Download PDFInfo
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- CN104075453A CN104075453A CN201310108111.XA CN201310108111A CN104075453A CN 104075453 A CN104075453 A CN 104075453A CN 201310108111 A CN201310108111 A CN 201310108111A CN 104075453 A CN104075453 A CN 104075453A
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Abstract
The invention discloses a water heater water leakage detection device. A water heater comprises a housing, the housing is provided with a water collecting tank, the bottom of the water collecting tank is provided with at least one temperature sensor, and the circuit of the temperature sensor is connected to a controller of the water heater. A water income pipe of the water heater is provided with an electromagnetic valve which is connected to the controller and which controls the water income pipe of the water heater. The electromagnetic valve which is connected to the controller and which controls the water income pipe of the water heater is arranged on the water income pipe of the water heater, the temperature characteristics of a negative temperature coefficient sensor are utilized, the controller sends signals to control the main power supply to switch on and off and the 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, if add water heater control panel, may have water, 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 check 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 when 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, so 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 end 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 while dripping on electric capacity contact 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 consisted 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 utility model 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 for accommodating the inner bag of a certain amount of heated water, be communicated with to transmit with described inner bag water inlet pipe and the outlet pipe that flows 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, corresponding audio frequency just can be detected in time and change, 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 checkout gear whether water heater leaks.
For reaching above object, the technical solution used in the present invention is: a kind of water leakage detection device for water heater, water heater comprises shell, shell is provided with the water leg that is positioned at inner bag below, it is characterized in that: described water leg bottom is provided with at least one temperature sensor, and the circuit of temperature sensor is with detected temperatures sensor output parameter and judge that the water heater controller whether water heater leaks is connected.
Described circuit is constant-voltage circuit U or constant current I circuit, and at least one resistance value R that connects on described temperature sensor is less than the self-resistance value R of temperature sensor
n.
Described temperature sensor is positive temperature coefficient temperature sensor or negative temperature coefficient temperature sensor, and preferably described temperature sensor is the temperature sensor that temperature sensor changes sensitive negative temperature coefficient.
In described circuit, be provided with the signal end of output temperature sensor output parameter, described output parameter comprises the magnitude of voltage U of 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
1signal end, described signal end is connected with controller.
The second temperature sensor that a detected temperatures sensor ambient temperature T is also set in described circuit, the second temperature sensor and temperature sensor are set up in parallel, and are positioned at sustained height.
In described controller, be provided with water leakage scope, water leakage scope is the output signal U of signal end while leaking
nor R
nor Δ T or Δ T
1scope.
The inner bag of described water heater is arranged on the open interior of described water leg, and described circuit is arranged on the bottom of water leg, and temperature sensor is positioned at the lowest part of water leg, and the open end of water leg contacts with two end sockets of water heater liner respectively.
On the water inlet pipe of water heater, be provided with the magnetic valve of being controlled water inlet pipe water inlet by controller.
The built-in processing instruction that leaks in described controller, described in the processing instruction that leaks be the instruction of closing water heater power supply and magnetic valve.
A kind of water leakage detection device for water heater of the present invention, 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.
Accompanying drawing explanation
Fig. 1 is the scheme of installation of a kind of water leakage detection device for water heater of the present invention on water heater;
Fig. 2 is a kind of water leakage detection device for water heater circuit diagram 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 a kind of water leakage detection device for water heater circuit diagram of the present invention.
Fig. 5 is the scheme of installation of another kind of water leakage detection device for water heater of the present invention on water heater;
Fig. 6 is the circuit diagram of a kind of water leakage detection device for water heater shown in Fig. 5;
Fig. 7 is the flow chart of a kind of water leakage detection device for water heater method therefor of the present invention;
1, inner bag 2, middle bucket 3, end socket 4, controller 5, water leg 6, temperature sensor 7, water inlet pipe 8, magnetic valve 9, heating tube 10, outlet pipe 11, signal end 12, the second temperature sensor
The specific embodiment
A kind of water leakage detection device for water heater, water heater comprises shell, shell is provided with the water leg that is positioned at inner bag below, it is characterized in that: described water leg bottom is provided with at least one temperature sensor different with resistance value in air in the water under same temperature, and the circuit of temperature sensor is with detected temperatures sensor output parameter and judge that the water heater controller whether water heater leaks is connected.In circuit, be provided with the signal end of output temperature sensor output parameter, described 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, for water leakage detection device for water heater of the present invention, be arranged on the structural representation in water heater.Inner bag 1 bottom of water heater is provided with water leg 5, and water leg 5 is arranged on outer cover of water heater inside, and the opening of water leg 5 is arranged on water heater liner bottom, and the end on two limits of openend is connected with liner end enclosure 3.The inner surface of water leg 5 is smooth not to get wet, facilitate water droplet or current to flow in passing the lowermost end of water leg 5, like this, between the middle bucket 2 of inner bag and the seam crossing of liner end enclosure 3 or the heating tube on end socket 9 and heating tube flange or the clearance leakage between heating tube flange and end socket 3, water droplet flow to the bottommost of water leg along the outer wall of end socket or the inner surface of water leg.At heater inleting pipe place, be provided with magnetic valve, by controller, control the switching of magnetic valve.
Embodiment mono-:
Water leg 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 guarantee 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 judgement magnitude of voltage U
nwhether belong to interval [330U/ (R+330), 1020U/ (R+1020)], if the output signal of controller judgement detector belongs in water leakage interval, water heater liner leaks, controller sends instruction, close the main power source of water heater, shut electromagnetic valve, forbids the continuation water inlet of water heater simultaneously.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can guarantee so to use the user's of water heater personal safety, can also cut off the water supply, avoid leaking always, cause the waste of water resource and user's property is caused damage.
Embodiment bis-:
Water leg 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 guarantee 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 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 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 judgement resistance value R
nwhether belong to interval [330,1020], if the output signal of controller judgement detector belongs in water leakage interval, water heater liner leaks, and controller sends instruction, closes the main power source of water heater, shut electromagnetic valve, forbids the continuation water inlet of water heater simultaneously.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can guarantee so to use the user's of water heater personal safety, can also cut off the water supply, avoid leaking always, cause the waste of water resource and user's property is caused damage.
Embodiment tri-:
Water leg 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 guarantee 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 judgement resistance value R
nwhether belong to interval [330,1020], if the output signal of controller judgement detector belongs in water leakage interval, water heater liner leaks, and controller sends instruction, closes the main power source of water heater, shut electromagnetic valve, forbids the continuation water inlet of water heater simultaneously.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can guarantee so to use the user's of water heater personal safety, can also cut off the water supply, avoid leaking always, cause the waste of water resource and user's property is caused damage.
Embodiment tetra-:
Water leg 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 guarantee 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 judgement magnitude of voltage U
nwhether belong to interval [330U/ (R+330), 1020U/ (R+1020)], if the output signal of controller judgement detector belongs in water leakage interval, water heater liner leaks, controller sends instruction, close the main power source of water heater, shut electromagnetic valve, forbids the continuation water inlet of water heater simultaneously.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can guarantee so to use the user's of water heater personal safety, can also cut off the water supply, avoid leaking always, cause the waste of water resource and user's property is caused damage.
Embodiment five:
Water leg 5 bottoms arrange a kind of water leakage detection device for water heater of the present invention, comprise temperature sensor 13 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 guarantee 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 little.
In a side of temperature sensor 13, be provided with the second temperature signal efferent duct of temperature sensor 12, the second temperature sensors 12 and the temperature signal end of temperature sensor 13 is all connected with controller as shown in Figure 5, temperature signal is transferred on controller.The current-limiting resistance of the second temperature sensor is much larger than the current-limiting resistance of the first temperature sensor, make the second temperature sensor substantially negligible because of the variations in temperature that self-heating causes, shown in Fig. 6 is the circuit diagram of the water leakage detection device for water heater of the present embodiment.
Controller is the difference of the temperature signal of accounting temperature sensor 13 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 inner in the temperature signal scope of leaking, if controller 4 judgement differences belong 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 sends instruction, close the main power source of water heater, shut electromagnetic valve, forbids the continuation water inlet of water heater simultaneously.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can guarantee so to use the user's of water heater personal safety, can also cut off the water supply, avoid leaking always, cause the waste of water resource and user's property is caused damage.
Embodiment six:
Water leg 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 guarantee 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 little.
The signal of signal end 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, forbids the continuation water inlet of water heater simultaneously.Send alarm signal, can be sound or optical signal simultaneously, and reminding user is dealt with in time.Can guarantee so to use the user's of water heater personal safety, can also cut off the water supply, avoid leaking always, cause the waste of water resource and user's property is caused 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 the order-driven water heater operation that water heater continues operation.
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 (9)
1. a water leakage detection device for water heater, water heater comprises shell, shell is provided with the water leg (5) that is positioned at inner bag below, it is characterized in that: described water leg (5) bottom is provided with at least one temperature sensor (6), and the circuit of temperature sensor (6) is with detected temperatures sensor output parameter and judge that the water heater controller (4) whether water heater leaks is connected.
2. a kind of water leakage detection device for water heater according to claim 1, it is characterized in that: described circuit is constant-voltage circuit U or constant current I circuit, at least one resistance value R of the upper series connection of described temperature sensor (6) is less than the self-resistance value R of temperature sensor
n.
3. a kind of water leakage detection device for water heater according to claim 1, it is characterized in that: described temperature sensor (6) is positive temperature coefficient temperature sensor or negative temperature coefficient temperature sensor, preferably described temperature sensor is the temperature sensor that temperature sensor changes sensitive negative temperature coefficient.
4. a kind of water leakage detection device for water heater according to claim 1, is characterized in that: in described circuit, be provided with the signal end of output temperature sensor output parameter, described output parameter comprises the magnitude of voltage U of temperature sensor (6)
nor resistance value R
nor the changing value Δ T of temperature sensor (6) self temperature within the unit interval or the temperature T of temperature sensor (6) self
ndifference DELTA T with environment temperature T
1signal end, described signal end (11) is connected with controller (4).
5. a kind of water leakage detection device for water heater according to claim 4, it is characterized in that: the second temperature sensor (12) that a detected temperatures sensor ambient temperature T is also set in described circuit, the second temperature sensor and temperature sensor are set up in parallel, and are positioned at sustained height.
6. a kind of water leakage detection device for water heater according to claim 4, is characterized in that: described controller is provided with water leakage scope in (4), and water leakage scope is the output signal U of signal end while leaking
nor R
nor Δ T or Δ T
1scope.
7. a kind of water leakage detection device for water heater according to claim 1, it is characterized in that: the inner bag of described water heater (1) is arranged on the open interior of described water leg (5), described circuit is arranged on the bottom of water leg, temperature sensor is positioned at the lowest part of water leg, and the open end of water leg (5) contacts with two end sockets (3) of water heater liner (1) respectively.
8. a kind of water leakage detection device for water heater according to claim 1, is characterized in that: on the water inlet pipe of water heater (7), be provided with the magnetic valve (8) of being controlled water inlet pipe water inlet by controller.
9. a kind of water leakage detection device for water heater according to claim 8, is characterized in that: the built-in processing instruction that leaks in described controller (4), described in the processing instruction that leaks be the instruction of closing water heater power supply and magnetic valve.
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|---|---|---|---|
| CN201310108111.XA CN104075453A (en) | 2013-03-29 | 2013-03-29 | Water heater water leakage detection device |
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|---|---|---|---|
| CN201310108111.XA CN104075453A (en) | 2013-03-29 | 2013-03-29 | Water heater water leakage detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800594A (en) * | 2017-04-28 | 2018-11-13 | 芜湖美的厨卫电器制造有限公司 | Gas heater |
| CN110848989A (en) * | 2019-11-12 | 2020-02-28 | 华帝股份有限公司 | Water leakage detection device and electric water heater |
| US11573148B2 (en) | 2019-08-12 | 2023-02-07 | A. O. Smith Corporation | Leakage detection in condensing water heater |
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| CN202814673U (en) * | 2012-09-19 | 2013-03-20 | 青岛经济技术开发区海尔热水器有限公司 | Water leakage detection sensor for water heater and water heater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800594A (en) * | 2017-04-28 | 2018-11-13 | 芜湖美的厨卫电器制造有限公司 | Gas heater |
| US11573148B2 (en) | 2019-08-12 | 2023-02-07 | A. O. Smith Corporation | Leakage detection in condensing water heater |
| CN110848989A (en) * | 2019-11-12 | 2020-02-28 | 华帝股份有限公司 | Water leakage detection device and electric water heater |
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Application publication date: 20141001 |