CN104184113A - SPA pool with electric leakage detection function and control method for electric leakage detection - Google Patents
SPA pool with electric leakage detection function and control method for electric leakage detection Download PDFInfo
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- CN104184113A CN104184113A CN201410443150.XA CN201410443150A CN104184113A CN 104184113 A CN104184113 A CN 104184113A CN 201410443150 A CN201410443150 A CN 201410443150A CN 104184113 A CN104184113 A CN 104184113A
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a control method for electric leakage detection of a SPA pool. The control method is used for detecting whether a heating body for heating the SPA pool leaks electricity or not, and includes the following steps: a, detecting the first voltage at the position of a detection point in first time, wherein the voltage is represented as y(t); b, calculating the voltage difference value between the first voltage and an initial voltage value, wherein the voltage difference value is represented as deltay=|y(t)-y(0)|; c, judging whether the voltage difference value ranges from a first threshold value to a second threshold value or not, if the voltage difference value ranges from the first threshold value to the second threshold value, detecting the second voltage of the detection point in second time again, and if the voltage difference value between the second voltage and the initial voltage value still ranges from the first threshold value to the second threshold value, sending an instruction of stopping supplying electricity to the heating body to an execution circuit.
Description
Technical field
The present invention relates to field, SPA pond, be specifically related to a kind of control method for SPA pond detection of electrical leakage and corresponding control device, described SPA pond is preferably a motion, health product.
Background technology
Along with scientific and technological development, improving constantly of quality of life, people more and more focus on the healthy of self, but increasing due to operating pressure, life stress, people often select a lot of pressure reducing modes, SPA as the healthy pressure of releiving, loosen the leisure service of skin, be subject to more and more people's favor, people are by SPA hydrotherapy, can reach the sense of hearing, the sense of taste, sense of touch, sense of smell, visual loosening, thereby release the pressure, the client who makes to be SPA feels as if relieved of a heavy load, it is many from physiology to psychology, all to loosen.
Show according to interrelated data, SPA comprises cold bath, hot bath, hot and cold water contrast bath, seawater bath, Hot Spring Bath, water-bath from the beginning, each bath can relax, relax anxiety, muscle and nerve tired out to a certain extent, get rid of vivotoxin, prevention and treatment disease, hydrotherapy coordinates the massage of various volatile oils in addition, can accelerate fat combustion, have the effect of weight reducing.SPA, by coordinating various rare trace elements, promotes human circulation, reaches the effect of beauty treatment; By hydrotherapy resistance to compression, alleviate human body self pressure; Promote perspire by heat effect, reach the object of weight reducing.
Along with the development of SPA technology extends, we often also add the elements such as some anions, ozone in SPA, increase the curative effect of SPA, but in general SPA recuperates, the comfort level that water in SPA pond need to heat to maintain SPA while recuperating, and SPA heater used tends to be arranged on below the water level in SPA pond, processing likely can cause the generation of the leaky in SPA pond like this, causes some potential safety hazards to the people in SPA pond.
Summary of the invention
Do not possess the technological deficiency of real-time monitor and detection leakage function for SPA pond in prior art, the object of this invention is to provide a kind of control method for SPA pond detection of electrical leakage, whether leak electricity and detect for the calandria that described SPA pond is heated, comprise the steps:
A. detect the first voltage of the test point position very first time, described voltmeter is shown y (t);
B. calculate the voltage difference between described the first voltage and Initial Voltage Value, described voltage difference is expressed as △ y=|y (t)-y (0) |;
C. judge that described voltage difference is whether between first threshold and Second Threshold;
If d. described voltage difference is between described first threshold and Second Threshold, again detect the second voltage of described the second time of test point, if the voltage difference between described second voltage and described Initial Voltage Value still, between described first threshold and Second Threshold, sends to executive circuit the instruction stopping to described calandria power supply.
Preferably, the above-mentioned control method for SPA pond detection of electrical leakage and also can detecting for other electrical appliance parts that described SPA pond is heated.
Preferably, in described step c, if described voltage difference, not between described first threshold and Second Threshold, directly sends to executive circuit the instruction stopping to described calandria power supply.
Preferably, before described step a, also comprise the steps:
After described calandria startup, before work, record detects the second voltage of described test point, and using described second voltage as described Initial Voltage Value.
Preferably, before described calandria work, detect described second voltage 10 seconds.
Preferably, described first threshold is a set point.
Preferably, described first threshold is any in following value:
-0.1v；
-0.2v；
-0.25V；
-0.28V；
-0.3V；
-0.35V；
-0.5v；
-0.8v；
-1v；
-1.5v；
-1.8v；
-2v；
-2.5v；
-3v；
-3.5v；
-4v；
-4.5v；
-5v; Or
-5.1v。
Preferably, described Second Threshold is calculated and is obtained by following formula: | first threshold-initial voltage value |/T, described T be described calandria from starting working to the accumulative total duration of current time, described accumulative total duration is hour to calculate as unit.
According to another aspect of the present invention, a kind of SPA pond with earth leakage detection functions is provided, described SPA pond at least comprises calandria, described calandria is for heating the water holding in described SPA pond, it is characterized in that, described calandria is connected with power supply, and described power supply provides electric energy to described calandria, the described SPA pond with earth leakage detection functions also comprises a current leakage detection system, described current leakage detection system at least comprises detecting unit, performance element, described detecting unit connects a detection line, the other end of described detection line connects the shell of described calandria, described performance element is used for controlling described power supply to be provided electric energy or stops providing electric energy to described calandria, and described detecting unit sends signal to make power supply described in described performance element control stop providing electric energy to described calandria to described performance element in the time the electric leakage of described calandria being detected.
Preferably, the other end of described detection line connects as any in lower component: as described in the shell of calandria; Or, the conductor part of described calandria.
Preferably, the other end of described detection line connects described calandria by isolated component.
Preferably, described isolated component is any in following element: safety electric capacity; Hall element, wherein said detection line is three; Instrument transformer; Or, optocoupler.
Preferably, described detection line is connected with the first pin of described detecting unit.
Preferably, between described detection line and described detecting unit, be also connected protection impedance component.
Preferably, described protection impedance component comprises any in following assembly: the first electric capacity; The series circuit of the first electric capacity and the second electric capacity; Or, the series circuit of the first electric capacity, the second electric capacity and the 3rd electric capacity.
Preferably, the second pin of described detecting unit connects a testing circuit, described testing circuit comprises the parallel circuits that the series circuit of the 4th electric capacity, the 5th electric capacity, the first resistance composition and the series circuit of the 6th electric capacity and the 7th electric capacity composition form, and described testing circuit is in parallel with described calandria by the second resistance.
Preferably, the second pin of described detecting unit connects a testing circuit, and the L_|N end of described testing circuit connects the 8th electric capacity, the other end of described the 8th electric capacity and described the 9th electric capacity, the negative pole that is connected afterwards the first diode after the 3rd resistance series connection with one end parallel connection of the 4th resistance, the positive pole of described the first diode is connected with the negative pole of the second diode, the positive pole of described the second diode is connected with the negative pole of the 3rd diode, and described the first diode, the second diode, the series circuit of the 3rd diode composition respectively with one end of the 16 electric capacity, one end of the 14 electric capacity, one end parallel connection of the 7th resistance, one end of the tenth electric capacity connects the 11 electric capacity, and described the tenth electric capacity, series circuit and the 12 electric capacity of the 11 electric capacity composition, the 13 electric capacity, the 6th resistance, after the series circuit parallel connection of the 5th resistance composition, be connected to the other end of described the 4th resistance, the other end of described the 16 electric capacity, the other end of described the 14 electric capacity, the other end of described the 7th resistance, one end of described the 17 electric capacity, one end of described the 15 electric capacity, one end of described the 8th resistance, the negative pole of described the 4th diode is connected to described the 6th resistance, the centre of the 5th resistance, and the negative pole of the 5th diode, the anodal anode that connects respectively described the 4th diode, the negative pole of the 6th diode, described the 4th diode, described the 5th diode, the series circuit of the 6th diode composition respectively with described the 17 electric capacity, described the 15 electric capacity, the other end parallel connection of described the 8th resistance.
Preferably, described performance element at least comprises a relay, and described relay is the closed or disconnection from the switch between the described power supply of control and the described calandria of described detecting unit for basis.
The described control method for SPA pond detection of electrical leakage, by electric leakage degree being quantified as to the integration of leakage current and drain voltage and its action time, by the method for weighting moving average forecasting, realizes the dynamic protection to electric leakage.
More specifically; the described control method for SPA pond detection of electrical leakage is effective to the protection of the electric leakage real-time judge of various environments for use and various different insulative strength S PA pond body and dynamically electric leakage variation; meet safety requirement; further, the described control method for SPA pond detection of electrical leakage can be applied to there is time step characteristic, the dynamic protection field in multiple environment for use, various dielectric strength SPA pond.
Brief description of the drawings
Fig. 1 illustrates according to a specific embodiment of the present invention, the calandria that described SPA pond the is heated particular flow sheet detecting that whether leaks electricity;
Fig. 2 illustrates according to a specific embodiment of the present invention, the structural relation figure in described SPA pond between each module;
Fig. 3 illustrates according to a specific embodiment of the present invention, at the structural topology figure of current leakage detection system described in described SPA pond;
Fig. 4 illustrates according to a specific embodiment of the present invention, at the partial circuit figure of current leakage detection system described in described SPA pond;
Fig. 5 illustrates according to another kind of embodiment of the present invention, at the circuit diagram of current leakage detection system described in described SPA pond; And
Fig. 6 illustrates according to a specific embodiment of the present invention, at the circuit diagram of current leakage detection system described in described SPA pond.
illustration
1, SPA pond
2, calandria
21, conductor 22, insulator
23, electrified body
3, power supply
4, current leakage detection system
41, detecting unit 42, performance element
5, other control circuits
6, water
7, relay
8, detection line
9, Hall element
Embodiment
In order better to make technical scheme of the present invention clearly show, below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 illustrates according to a specific embodiment of the present invention, the calandria that described SPA pond the is heated particular flow sheet detecting that whether leaks electricity, particularly, shown in Fig. 1 is a kind of control method for SPA pond detection of electrical leakage, further, whether the described calandria that described SPA pond is heated leaks electricity to detect is not limited to described control method, described control method is just for a kind of preference shown in the specific embodiment of the present invention, particularly, comprise the steps:
First enter step S101, detect the first voltage of the test point position very first time, described voltmeter is shown y (t), those skilled in the art understand, described test point refers to the detection position that can reflect whether detection bodies leaks electricity, by those skilled in the art's technical research and a large amount of optimal location obtaining that detects, by described test point is detected, can measure the voltage of described position preferably, described optimal location, near described testing circuit, is labeled as A point by described optimal location.The measurement of described voltage is to draw by this area correlate meter equipment Inspection, for example electric capacity, transducer etc., and more specifically, described testing circuit will be talked about in detail in the specific embodiment of the present invention, not repeat them here.
Described y (t) refers to after the calandria operating time in described SPA pond t, and the voltage detecting at described test point further, preferably changes in example at one, and described y (t) can also be that described calandria starts after k second, from t
kmoment timing, the detection voltage reruning after time t, it will be appreciated by those skilled in the art that above-mentioned variation example belongs to the embodiment of described detection voltage, does not affect technical scheme of the present invention, does not repeat them here.、
Those skilled in the art understand, the object of the first voltage of the described detection test point position very first time is the real-time voltage in order to monitor described calandria, and for described real-time voltage, electric leakage situation to described calandria is carried out computational analysis, thereby determine whether described calandria leaks electricity, further, described calandria is made to correspondingly technical finesse.
Preferably, those skilled in the art understand, before carrying out described step S101, also should do following processing for described execution mode: record detects the first voltage of described test point after described calandria startup, before work, and using described the first voltage as described Initial Voltage Value.Preferably, by described y (0) expression for Initial Voltage Value, after described Initial Voltage Value y (0) refers to that described calandria starts, but the voltage while also not carrying out work, described magnitude of voltage y (0) can reflect the voltage condition under current state, and by with described step S101 in detection voltage compare, do technical finesse further, described technical finesse will be talked about in detail in step S102, not repeat them here.
It will be appreciated by those skilled in the art that at one and preferably change in example, according to the idiographic flow that detects Initial Voltage Value in above-described embodiment, preferably before described calandria work, detect described the first voltage 10 seconds.Particularly, those skilled in the art understand, in order effectively to detect described the first voltage, and fully reflect electric leakage situation, the described time of detecting in advance described the first voltage should not be long also unsuitable too short, described 10 seconds in advance detect described initial voltage is according to those skilled in the art's great many of experiments and the preferred version that calculates, further, preferably change in example at another, also can shift to an earlier date 5 seconds described initial voltage is detected, this does not affect described electric leakage situation is carried out to analytical calculation, does not repeat them here.
At execution of step S101, after, carry out step S102, calculate the voltage difference between described the first voltage and Initial Voltage Value, described voltage difference is expressed as △ y=|y (t)-y (0) |, preferably, in the current leakage detection system in described SPA pond, be equipped with a computing module, described computing module is for calculating the voltage difference between described the first voltage and Initial Voltage Value, particularly, draw y (t) by described step S101, and before described step S101, draw y (0), further, pass through execution algorithm | y (t)-y (0) |, draw △ y, described △ y refers to that described calandria is after running time t, the variable quantity of described voltage, those skilled in the art understand, the variable quantity of described voltage can fully reflect whether described calandria exists electric leakage, and the weight of described electric leakage situation.
Then, enter step S103, judge that described voltage difference is whether between first threshold and Second Threshold.Described first threshold is an experimental constant, is the constant calculating through those skilled in the art's great many of experiments, and preferably, described first threshold is a set point, and particularly, described first threshold is between 0.1v to 5.1v.
Those skilled in the art understand, preferably change in example at one, described first threshold is got 0.3V, particularly, the value of described first threshold has affected the position between described △ y location, further, described current leakage detection system is taked different solutions for different intervals, thereby has affected the programme of work of whole current leakage detection system under certain condition.Further, described first threshold can also be chosen 0.25V, 0.28V, 0.35V etc., but described first threshold is preferably between 0.2V to 0.5V, preferably, those skilled in the art understand, choosing of described first threshold can be configured or the value of first threshold is built in the built-in chip of described current leakage detection system manually, do not repeat them here.
Those skilled in the art understand, described Second Threshold preferably adopts following formula to calculate and obtains: | first threshold-initial voltage value |/T, further, described T be described calandria from starting working to the accumulative total duration of current time, described accumulative total duration is hour to calculate as unit.Further, learn by described formula, described first threshold is constant, and described initial voltage value, after detecting, also can not change again, and further, along with the accumulative total of time, described Second Threshold will diminish thereupon.
Further, those skilled in the art understand, described SPA pond current leakage detection system is preferably set two threshold values, and belong to different threshold ranges for described voltage difference and correspondingly take different solutions, the intensity of variation of electric leakage is quantified as to the integration of leakage current and drain voltage and its action time, by the method for weighting moving average forecasting, realize the dynamic protection to electric leakage, more specifically, the described intensity of variation by electric leakage is quantified as leakage current and the integration of drain voltage and its action time will be talked about in the specific embodiment of the present invention, do not repeat them here.
Executing after described step S103, preferably changing in example at one, if described voltage difference, not between described first threshold and Second Threshold, directly sends to executive circuit the instruction stopping to described calandria power supply.Preferably, suppose that described first threshold is U
1, described Second Threshold is U
2, in the time of described U2 > △ y > U1, illustrating that described calandria may exist leaky, need to detect further described calandria, described detection mode will be talked about in detail in step S104.Do not repeat them here.
Preferably, if described voltage difference is not between described first threshold and Second Threshold, in the time of △ y > U2 or U1 > △ y, perform step S105, directly send to executive circuit the instruction stopping to described calandria power supply, particularly, in the time of △ y > U2, described voltage variety is very large, those skilled in the art understand, described electric leakage degree is very serious, should report immediately fault, and to lock whole product be that it can not work on again, in the time of U1 > △ y, can be divided into two kinds of situations analyzes, if when described calandria is not worked, described U1 > △ y, or described △ y equals 0, illustrate that described △ y is very little, may be because line does not connect or the hardware such as correlation function disappearance on the voltage that causes of accident defect too small, further, execution step S105, if described calandria is normally in service, U1 > △ y illustrates that described calandria does not exist described electric leakage situation.
Further, those skilled in the art understand, if described U2 > △ y > U1, need described calandria to carry out detection again, particularly, detect the second voltage of described the second time of test point, if the voltage difference between described second voltage and described Initial Voltage Value still between described first threshold and Second Threshold, sends to executive circuit the instruction stopping to described calandria power supply.
Those skilled in the art understand, the second voltage of described the second time refers to again and detects by testing circuit the magnitude of voltage drawing, preferably, in the time of described U2 > △ y > U1, should at once disconnect the power supply of described calandria, and wait for after some seconds, again to described calandria power supply, and in power supply first 10 seconds, record described Initial Voltage Value, described Initial Voltage Value is different from y (0), further, calculate described voltage difference according to described second voltage, and the threshold interval at the described voltage difference of judgement place again, further, if described voltage difference is still between described first threshold and described Second Threshold, illustrate that described calandria exists leaky in running, and send the instruction stopping to the power supply of described calandria to executive circuit.If described voltage difference is less than described first threshold, can tentatively judge that described calandria is working properly, but still need carry out tracking and monitoring, if described voltage difference is greater than described Second Threshold, stop power supply immediately.
Preferably; those skilled in the art understand; described voltage difference can also be scaled insulating barrier resistance sizes by a large amount of science calculating and embody; particularly; in the time that calandria insulation resistance drops to below set point; testing circuit sends the instruction of stopping power supply to described executive circuit, thereby has cut off the power supply to described calandria, has realized earth leakage protective.
Fig. 2 illustrates according to a specific embodiment of the present invention, structural relation figure in described SPA pond between each module, shown in figure is the fragmentary cross-sectional view in described SPA pond, is not complete SPA pond system, for example, in figure, only show part water and part pond outer wall, further, described in the module position that illustrates be the specific embodiment of the present invention, can also have other forms of expression, this does not affect technical scheme of the present invention, does not repeat them here.
Further, Fig. 2 is for the corresponding relation that is connected between described current leakage detection system and described calandria and described SPA pond is shown better, particularly:
Described calandria 2 contacts with the water 6 in described SPA pond 1, and the water 6 in water supply pond 1 heats.Described calandria is preferably used wrapped with insulation, and uses conductor to cover on top layer.
Further, described calandria 2 connects power supply 3 on the other hand, and described power supply 3 continues to power to described calandria 2.Described power supply 3 can also be controlled other circuit and system, and further, described power supply 3 can use independent current source also can use described SPA that the power supply providing is provided.
More specifically, described calandria 2 connects current leakage detection system 4, and described current leakage detection system 4 can provide real-time detection of electrical leakage situation, and judges whether to stop to power to described calandria 2 by the information of real-time detection.
Preferably, also comprise testing circuit and executive circuit (not shown) in described current leakage detection system 4, described testing circuit and executive circuit will specifically be talked about in embodiment, not repeat them here.
Further, described current leakage detection system 4 also connects other control circuit systems 5, and described other control circuit systems 5 belong to currently available technology, do not repeat them here.
Fig. 3 illustrates according to a specific embodiment of the present invention, at the structural topology figure of current leakage detection system described in described SPA pond, as shown in the figure, described current leakage detection system 4 at least comprises detecting unit 41, performance element 42, described detecting unit 41 connects one end of a detection line 8, the other end of described detection line 8 connects described calandria 2, described performance element 42 provides electric energy or stops providing electric energy to described calandria 2 for controlling described power supply 3, and described detecting unit 41 sends signal to described performance element 42 in the time detecting that described calandria 2 leaks electricity to be stopped providing electric energy to described calandria 2 to make described performance element 42 control described power supply 3.
Whether described detecting unit 42 leaks electricity for detection of described calandria 2, workflow is with reference to the embodiment of figure 1 particularly, further, there is leaky if detect described calandria 2 by described detection, the instruction request that stops powering to described calandria 2 is sent to described executive circuit 42 by described testing circuit 41, described executive circuit 42 provides electric energy or stops providing electric energy to described calandria 2 for controlling described power supply 3, the potential safety hazard that can effectively monitor the electric leakage situation of described calandria and effectively prevent described electric leakage situation to bring by above-mentioned control method.
Further, described detecting unit connects a detection line 8, the other end of described detection line 8 connects described calandria 2, described detection line 8 is for detection of the real-time voltage of described calandria 2, and by formula △ y=|y (the t)-y (0) in Fig. 1 |, the electric leakage situation of described calandria is carried out to analyzing and processing.More specifically, the other end of described detection line 8 preferably connects the shell of described calandria 2, is preferably coated with conductor 23 on described shell, and the specific descriptions of described conductor 23, by talking about in detail in the description about calandria 2 in Fig. 3, do not repeat them here.Preferably change in example at another, the other end of described detection line 8 can also connect the concrete position of described calandria 2 or connect other positions of described current leakage detection system 4.
Those skilled in the art understand, preferably change in example at another, on described calandria, be equipped with an isolated component, described detection line 8 is preferably connected in described isolated component, further, described isolated component is any in following element: Hall element, instrument transformer, optocoupler, electric capacity.Described Hall element refers to a kind of Magnetic Sensor based on Hall effect, it will be appreciated by those skilled in the art that described Hall element is the same with described instrument transformer and described optocoupler in function.More specifically, as shown in Figure 5, described Hall element is connected with described calandria, and three detection lines connect respectively described Hall element and described detecting unit.It will be appreciated by those skilled in the art that the conduction by described Hall element, can obtain voltage or resistance or the current information of described calandria, thereby can judge that whether described calandria is charged; If charged, show described calandria electric leakage, described detecting unit sends command signal to described performance element, and described performance element stops to described calandria power supply.Further, those skilled in the art can be achieved to described working mechanism embodiment illustrated in fig. 5 with reference to following Fig. 4, do not repeat them here.
Preferably, described detection line 8 is connected with the first pin of described detecting unit 41.In described detecting unit 41, can have many places pin, described pin refers to that internal circuit draws and the wiring of peripheral circuit, and described pin is used for connecting described detection line 8 and described detecting unit 41.
Preferably, between described detection line 8 and described detecting unit 41, be also connected impedance component.Described impedance component refers in circuit can play the elements such as resistance, inductance and the electric capacity of inhibition to electric current.Particularly, between described detection line 8 and described detecting unit 41, be connected impedance component for the protection of impedance, Limited Current, further, the voltage that described current leakage detection system 4 is ordered by A described in described electric circuit inspection.
Preferably; as shown in the figure; shown in Fig. 3, between described detection line 8 and described detecting unit 41, be provided with two electric capacity; be respectively C1 and C2; described electric capacity is for the protection of impedance and Limited Current; described two electric capacity connect by the mode of series connection; further; those skilled in the art understand; preferably change in example at one; between described detection line 8 and described detecting unit 41, can also be provided with an electric capacity or three electric capacity or more, this does not affect technical scheme of the present invention, does not repeat them here.
Preferably change in example at another; if the shell basic insulation of described calandria 2; more specifically; if that connects described calandria 2 at described detection line 8 is basic insulation; there is insulation protection more than basic insulation with described water 6, between described detection line 8 and described detecting unit 41, can not adopt described protection impedance.
Further, as described in Figure 3, described executive circuit 42 is directly controlled the power supply of described calandria 2, between described executive circuit 42 and described calandria 2, be preferably equipped with a relay, described relay is by the power supply of calandria 2 described in switch control, further, described switch is controlled by executive circuit 42.Preferably, described power supply 3 connects described executive circuit, and described relay is the closed or disconnection from the switch between the described power supply 3 of control and the described calandria 2 of described detecting unit 41 for basis.
As described in Figure 3, described calandria 2 innermost layers are electrified body 23, after described electrified body energising, sustained release goes out heat energy, intermediate layer is insulating barrier 22, and described insulating barrier 22 is preferably selected polyimide film, more specifically, preferably described insulating barrier is 3.5 layers of polyimide film, preferably change in example at one, described insulating layer material can also use other insulating material to replace, and that described insulating material should have is waterproof, leakproof, the characteristic such as high temperature resistant.Outermost one deck is conductor 21; described conductor 21 can be transmitted to the electric leakage situation of described surface of insulating layer on described conductor 21,, detect the electric leakage situation of described calandria 2; it will be appreciated by those skilled in the art that described conductor 21 can also play the effect of the described insulating barrier 22 of protection.
Preferably, described testing circuit 41 also connects other control circuits 5, in described other control circuits 5, is preferably equipped with live wire and zero line, forms electrical potential difference with described test point A, forms path.
Fig. 4 illustrates according to a specific embodiment of the present invention, at the partial circuit figure of current leakage detection system described in described SPA pond, those skilled in the art understand, the second pin of described detecting unit connects a testing circuit, described testing circuit comprises the 4th electric capacity, the 5th electric capacity, the parallel circuits that the series circuit of the series circuit of the first resistance composition and the 6th electric capacity and the 7th electric capacity composition forms, and described testing circuit is in parallel with described calandria by the second resistance, described in figure, L refers to live wire, described N refers to zero line, described C1, C2, C4, C5, C6, C7 is electric capacity, the effect of described electric capacity is for the protection of impedance, Limited Current.The resistance R 1 of connecting with described capacitor C 4 and C5, described R1 is for input, and described testing circuit is in parallel with described calandria by resistance R 2, and described R2 is used for Limited Current further, and in Fig. 4, A point refers to described test point.
Further; extremely embodiment illustrated in fig. 4 with reference to above-mentioned Fig. 1; those skilled in the art understand; at a preferred embodiment; the invention provides a kind of SPA product electrical leakage detecting method based on weighting moving average forecasting method; the intensity of variation of electric leakage is quantified as to the integration of leakage current and drain voltage and its action time, by the method for weighting moving average forecasting, realizes the dynamic protection to electric leakage.The present invention also provides a kind of and has adopted absolute quantity method based on actual use scenes and side circuit component parameters, realizes the real-time judge to the electric leakage of SPA product.Further, without ground unit, electric leakage is monitored, system is carried out to threshold value protection.
Experimental result shows institute's extracting method to the electric leakage real-time judge of various environments for use and different insulative strength S PA pond body and the protection that dynamically electric leakage changes is effective; meet safety requirement, can be applied to there is time step characteristic, the dynamic protection field in multiple environment for use, various dielectric strength SPA pond.
In conjunction with the specific embodiment shown in Fig. 1 to Fig. 4, the invention provides a kind of current leakage detection system for SPA product:
(1) this system gathers the dielectric strength value of revealing between voltage and Leakage Current and electrified body and water with electric capacity or transducer.
(2) this system can be used independent current source also can use SPA power supply that product provides.
(3) this system is used electric capacity, optocoupler, instrument transformer or Hall element to isolate signal.
(4) on software, electric leakage degree is quantified as to the integration of leakage current and drain voltage and its action time, by the method for weighting moving average forecasting, realizes the dynamic protection to electric leakage.
(5) all rain supplies that are set, before powering on, system can record value of feedback now, as benchmark, is used for getting rid of the interference of environment, native system parts parameter differences.
(6) this system is used a wire directly to connect or connects measured body by a constant impedance.
Further, it will be appreciated by those skilled in the art that described current leakage detection system detects principle as follows:
Judge the insulation resistance of charged utensil, when it declines, just protection while reaching threshold value.
Judge A point voltage, reach after threshold value, just protection.
Judge that A point is to electric current in analog, reach just protection after threshold value.
Further, the principle of described software detection is as follows:
First, Real-Time Monitoring A point feedback signal value, is made as y, and system operation initial value is y (0), is y (t) after time t, y (t)=∫ f (t), and △ y=|y (t)-y (0) |.If threshold value 1 is U1 (constant, experimental data), threshold value 2 is U2, and system accumulated running time is T.
Preferably, 10s before PTC work, records initial value y (0);
Further, when detecting and judge U2 > △ y > U1 for the first time, need again in △ y value of detection computations, when also detecting while judging U2 > △ y > U1 for the second time, controller executive circuit can stop to heating installation power supply, and reports error code.
Further, judge and report immediately fault by △ y=0 when detecting, and lock whole product it can not be worked again, monitor otherwise continue energising, and upgrade y (0) and U2;
More specifically, as △ y > U2, report immediately fault, and lock whole product it can not be worked again.
Wherein, U2 is along with | U1-y (0) | and/T value diminishes and diminishes.
It will be appreciated by those skilled in the art that as shown in Figure 3, the detection of electrical leakage principle of described current leakage detection system is as follows:
It will be appreciated by those skilled in the art that described detection of electrical leakage is made up of testing circuit and executive circuit, as Fig. 3 right-hand component, and by a wire, shell and the testing circuit of electrified body PTC-heater are linked together.
Preferably; testing circuit detects the insulation resistance of electrified body in real time by connecting wire; in the time that electrified body (ptc heater) insulation resistance drops to set point as 10 megaohm; testing circuit output control command; and cut off the power supply to electrified body (ptc heater) by executive circuit, thereby the earth leakage protective of realization.
Further, to embodiment illustrated in fig. 5, it will be appreciated by those skilled in the art that described current leakage detection system comprises detecting unit with reference to above-mentioned Fig. 1, the second pin of described detecting unit connects a testing circuit, and described testing circuit can be achieved by various embodiment.For example, Fig. 6 illustrates according to a specific embodiment of the present invention, at the circuit diagram of current leakage detection system described in described SPA pond, the schematic diagram of especially described testing circuit.Particularly, the L_|N end of described testing circuit connects the 8th electric capacity, the other end of described the 8th electric capacity and described the 9th electric capacity, the negative pole that is connected afterwards the first diode after the 3rd resistance series connection with one end parallel connection of the 4th resistance, the positive pole of described the first diode is connected with the negative pole of the second diode, the positive pole of described the second diode is connected with the negative pole of the 3rd diode, and described the first diode, the second diode, the series circuit of the 3rd diode composition respectively with one end of the 16 electric capacity, one end of the 14 electric capacity, one end parallel connection of the 7th resistance, one end of the tenth electric capacity connects the 11 electric capacity, and described the tenth electric capacity, series circuit and the 12 electric capacity of the 11 electric capacity composition, the 13 electric capacity, the 6th resistance, after the series circuit parallel connection of the 5th resistance composition, be connected to the other end of described the 4th resistance, the other end of described the 16 electric capacity, the other end of described the 14 electric capacity, the other end of described the 7th resistance, one end of described the 17 electric capacity, one end of described the 15 electric capacity, one end of described the 8th resistance, the negative pole of described the 4th diode is connected to described the 6th resistance, the centre of the 5th resistance, and the negative pole of the 5th diode, the anodal anode that connects respectively described the 4th diode, the negative pole of the 6th diode, described the 4th diode, described the 5th diode, the series circuit of the 6th diode composition respectively with described the 17 electric capacity, described the 15 electric capacity, the other end parallel connection of described the 8th resistance.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (18)
1. the detection of electrical leakage control method for SPA pond, whether leak electricity and detect for the calandria (2) described SPA pond being heated by a current leakage detection system, it is characterized in that, described calandria (2) is connected with power supply, and described power supply provides electric energy to described calandria (2), described current leakage detection system at least comprises detecting unit, described detecting unit connects a detection line, the other end of described detection line connects described calandria, comprises the steps:
The first voltage of a, the detection test point position very first time, described voltmeter is shown y (t);
B, calculate the voltage difference between described the first voltage and Initial Voltage Value, described voltage difference is expressed as △ y=|y (t)-y (0) |;
C, judge that described voltage difference is whether between first threshold and Second Threshold;
If the described voltage difference of d is between described first threshold and Second Threshold, again detect the second voltage of described the second time of test point, if the voltage difference between described second voltage and described Initial Voltage Value still, between described first threshold and Second Threshold, sends to executive circuit the instruction stopping to described calandria power supply.
2. control method according to claim 1, is characterized in that, in described step c, if described voltage difference, not between described first threshold and Second Threshold, directly sends to executive circuit the instruction stopping to described calandria power supply.
3. control method according to claim 1 and 2, is characterized in that, before described step a, also comprises the steps:
-after described calandria startup, before work, record detects the first voltage of described test point, and using described the first voltage as described Initial Voltage Value.
4. control method according to claim 3, is characterized in that, before described calandria work, detect described the first voltage 10 seconds.
5. according to the control method described in any one in claim 1 to 4, it is characterized in that, described first threshold is a set point.
6. control method according to claim 5, is characterized in that, described first threshold is between 0.1v to 5.
7. control method according to claim 6, is characterized in that, described first threshold is any in following value:
-0.1v；
-0.2v；
-0.25V；
-0.28V；
-0.3V；
-0.35V；
-0.5v；
-0.8v；
-1v；
-1.5v；
-1.8v；
-2v；
-2.5v；
-3v；
-3.5v；
-4v；
-4.5v；
-5v; Or
-5.1v。
8. according to the control method described in any one in claim 1 to 7, it is characterized in that, described Second Threshold is calculated and is obtained by following formula: | first threshold-initial voltage value |/T, described T is that described calandria is from starting working to the accumulative total duration of current time.
9. one kind has the SPA pond of earth leakage detection functions, described SPA pond (1) at least comprises calandria (2), described calandria (2) is for heating the water holding in described SPA pond (1), it is characterized in that, described calandria (2) is connected with power supply, and described power supply provides electric energy to described calandria (2), the described SPA pond with earth leakage detection functions also comprises a current leakage detection system, described current leakage detection system at least comprises detecting unit, performance element, described detecting unit connects one end of a detection line, the other end of described detection line connects described calandria, described performance element is used for controlling described power supply to be provided electric energy or stops providing electric energy to described calandria (2), and described detecting unit is detecting that described calandria (2) when electric leakage sends signal to make power supply described in described performance element control stop providing electric energy to described calandria (2) to described performance element.
10. SPA according to claim 9 pond, is characterized in that, the other end of described detection line connects as any in lower component:
The shell of-described calandria; Or
The conductor part of-described calandria.
11. SPA according to claim 9 ponds, is characterized in that, the other end of described detection line connects described calandria by isolated component.
12. SPA according to claim 11 ponds, is characterized in that, described isolated component is any in following element:
-safety electric capacity;
-Hall element, wherein said detection line is three;
-instrument transformer; Or
-optocoupler.
13. according to the SPA pond described in any one in claim 9 to 12, it is characterized in that, described detection line is connected with the first pin of described detecting unit.
14. according to the SPA pond described in any one in claim 9 to 12, it is characterized in that, is also connected protection impedance component between described detection line and described detecting unit.
15. SPA according to claim 14 ponds, is characterized in that, described protection impedance component comprises any in following assembly:
The-the first electric capacity;
The series circuit of the-the first electric capacity and the second electric capacity; Or
The series circuit of the-the first electric capacity, the second electric capacity and the 3rd electric capacity.
16. according to the SPA pond described in any one in claim 9 to 15, it is characterized in that, the second pin of described detecting unit connects a testing circuit, described testing circuit comprises the parallel circuits that the series circuit of the 4th electric capacity, the 5th electric capacity, the first resistance composition and the series circuit of the 6th electric capacity and the 7th electric capacity composition form, and described testing circuit is in parallel with described calandria by the second resistance.
17. according to the SPA pond described in any one in claim 9 to 15, it is characterized in that, the second pin of described detecting unit connects a testing circuit, and the L_|N end of described testing circuit connects the 8th electric capacity, the other end of described the 8th electric capacity and described the 9th electric capacity, the negative pole that is connected afterwards the first diode after the 3rd resistance series connection with one end parallel connection of the 4th resistance, the positive pole of described the first diode is connected with the negative pole of the second diode, the positive pole of described the second diode is connected with the negative pole of the 3rd diode, and described the first diode, the second diode, the series circuit of the 3rd diode composition respectively with one end of the 16 electric capacity, one end of the 14 electric capacity, one end parallel connection of the 7th resistance, one end of the tenth electric capacity connects the 11 electric capacity, and described the tenth electric capacity, series circuit and the 12 electric capacity of the 11 electric capacity composition, the 13 electric capacity, the 6th resistance, after the series circuit parallel connection of the 5th resistance composition, be connected to the other end of described the 4th resistance, the other end of described the 16 electric capacity, the other end of described the 14 electric capacity, the other end of described the 7th resistance, one end of described the 17 electric capacity, one end of described the 15 electric capacity, one end of described the 8th resistance, the negative pole of described the 4th diode is connected to described the 6th resistance, the centre of the 5th resistance, and the negative pole of the 5th diode, the anodal anode that connects respectively described the 4th diode, the negative pole of the 6th diode, described the 4th diode, described the 5th diode, the series circuit of the 6th diode composition respectively with described the 17 electric capacity, described the 15 electric capacity, the other end parallel connection of described the 8th resistance.
18. according to the SPA pond described in any one in claim 9 to 17, it is characterized in that, described performance element at least comprises a relay, and described relay is the closed or disconnection from the switch between the described power supply of control and the described calandria of described detecting unit for basis.
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| CN104515933A (en) * | 2014-12-12 | 2015-04-15 | 国家电网公司 | Leak current fault detecting method and device |
| CN104891300A (en) * | 2015-06-29 | 2015-09-09 | 周志鸿 | Lift electric leakage detection device and system |
| CN106707032A (en) * | 2017-01-19 | 2017-05-24 | 厦门昰能机电科技有限公司 | Ground wire resistance value detection circuit |
| CN113687269A (en) * | 2021-09-23 | 2021-11-23 | Tcl家用电器（合肥）有限公司 | Heating pipe monitoring circuit and monitoring method thereof and washing machine |
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| CN104184113B (en) | 2017-12-08 |
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Denomination of invention: A SPA water tank with leakage detection function and leakage detection control method Granted publication date: 20171208 Pledgee: Shanghai Bank Co.,Ltd. Fengxian Branch Pledgor: Oriental Recreational Products (Shanghai) Co.,Ltd. Registration number: Y2024980011993 |