CN106092181A - Water heater and detection device and method thereof - Google Patents
Water heater and detection device and method thereof Download PDFInfo
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- CN106092181A CN106092181A CN201610393519.XA CN201610393519A CN106092181A CN 106092181 A CN106092181 A CN 106092181A CN 201610393519 A CN201610393519 A CN 201610393519A CN 106092181 A CN106092181 A CN 106092181A
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- magnesium rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
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- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention provides a kind of water heater and the detection device and method of magnesium rod thereof.Wherein, described detection device, for detecting the loss of the magnesium rod in water-heater water tank, including: LASER Light Source, it is used for sending laser and is irradiated to described magnesium rod；Photodetector unit, the excellent and described photodetector unit of described magnesium is sequentially arranged on the optical axis of laser, and the detection after the laser that described photodetector unit sends for receiving LASER Light Source is radiated on magnesium rod is used up, and output detections signal；Control unit, for judging the loss of described magnesium rod according to described detection signal, exports control signal.The solution of the present invention, it is possible to the loss situation of detection magnesium rod is to be replaced in time, thus has ensured that magnesium rod is to the cleaning of water in water tank, the effect of playing protection inner bag.
Description
Technical field
The present invention relates to technical field of electric appliances, particularly relate to a kind of water heater and detection device and method thereof.
Background technology
Currently, in the various water heaters such as air-source water heater, electric heater and solar water heater, some are all taked to arrange
Execute and prevent water-heater water tank life-time service to be corroded.According to principle of cathodic protection, water heater producer is typically employed on water tank peace
Dress magnesium rod prevents water tank from corroding.Such as, Authorization Notice No. is that the Chinese utility model patent of CN202328793U discloses one
Planting magnesium bar special for air energy water heater, including magnesium rod, one end of magnesium rod is provided with fixing end cap, sets between fixing end cap and magnesium rod
There is pad.Thus, by magnesium rod in water tank with the impurity chemically reactive in water, reach to increase water quality, take out stains, protect
The effect of inner bag.
But, described magnesium rod has specified service life, usually 2 years, and this life-span does not comes with the volume size of magnesium rod
Weigh.Magnesium rod determines the corrosivity power of corrosive medium, protected area, inner bag as a corrosion succedaneum, its life-span
Depending on of the factors such as quality.In the area of water quality inferiority, or inner bag enamel damages, protected area big when, described magnesium rod
Often can only use half a year, the most shorter.That is, magnesium rod is consumable goods, and periodic replacement magnesium rod becomes the important of inner bag life ensuring
Condition.Therefore, it is necessary to magnesium rod, such as be lost and replacing etc. is detected.
Summary of the invention
In view of this, the present invention provides a kind of water heater and detection apparatus and method thereof, it is possible to the loss situation to magnesium rod
Detect.
According to the first aspect of the invention, it is provided that a kind of detection device, for detecting the damage of the magnesium rod in water-heater water tank
Consumption, including: LASER Light Source, it is used for sending laser and is irradiated to described magnesium rod；Photodetector unit, the excellent and described photoelectricity of described magnesium
Detector unit is sequentially arranged on the optical axis of laser, and the laser that described photodetector unit sends for receiving LASER Light Source irradiates
Detection after on magnesium rod is used up, and output detections signal；And control unit, for judging institute according to described detection signal
State the loss of magnesium rod.
Further, described detection device also includes: alarm unit, for the judged result according to described control unit
Output alarm signal.
Further, described magnesium rod includes steel core, and the spot radius of described LASER Light Source is more than the radius of described steel core.
Further, judge that the detection signal that described photodetector unit exports is more than a threshold value when described control unit
Time, it is judged that magnesium rod is lost.
Further, judge that the detection signal that described photodetector unit exports reaches maximum when described control unit
Time, it is judged that described magnesium rod has been lost.
Further, if the radius of described magnesium rod is R, the radius of steel core is r, and the spot radius of laser is 1.5r, works as magnesium
When rod is lossless, R > 1.5r；Then
As R > 1.5r time, the hot spot of laser entirely falls within magnesium rod, and photodetector unit is not received by light quantity, without detection
Signal exports, then control unit judges that magnesium rod is lossless；
As 1.5r >=R ＞ r, laser facula part falls on magnesium rod, and photodetector unit detects part light quantity, output
First detection signal, according to this first detection signal, control unit judges that magnesium rod is lost；
As R=r, laser facula part falls on magnesium rod, and photodetector unit detects maximum amount, output the second inspection
Survey signal, according to this second detection signal, control unit judges that magnesium rod has been lost.
Further, described detection device also includes counting unit, when described photodetector unit detects described detection
Using up and during output detections signal, the count value of described counting unit adds 1；If described control unit judges described counting unit
Count value reaches pre-determined number, then judge that described magnesium rod is lost.
According to a second aspect of the present invention, it is provided that a kind of detection method, for detecting the loss of the magnesium rod in water-heater water tank,
Including: laser is irradiated on described magnesium rod；Receive the detection after laser is radiated on magnesium rod to use up, and output detections letter
Number；And the loss of described magnesium rod is judged according to described detection signal.
Further, described detection method, also include the result output alarm signal according to described judgement.
Further, described magnesium rod includes steel core, and the spot radius of described LASER Light Source is more than the radius of described steel core.
Further, when judging described detection signal more than a threshold value, it is judged that magnesium rod is lost.
Further, when judging that described detection signal reaches maximum, it is judged that described magnesium rod has been lost.
Further, if the radius of described magnesium rod is R, the radius of steel core is r, and the spot radius of laser is 1.5r, works as magnesium
When rod is lossless, R > 1.5r；Then
As R > 1.5r time, the hot spot of laser entirely falls within magnesium rod, and photodetector unit is not received by light quantity, without detection
Signal exports, then judge that magnesium rod is lossless；
As 1.5r >=R ＞ r, laser facula part falls on magnesium rod, and photodetector unit detects part light quantity, output
According to this first detection signal, first detection signal, then judge that magnesium rod is lost；
As R=r, laser facula part falls on magnesium rod, and photodetector unit detects maximum amount, output the second inspection
Survey signal, then judge that magnesium rod has been lost according to this second detection signal.
Further, described detection method, also include: counting step, when detecting that described detection is used up and exports inspection
When surveying signal, count value adds 1；If described count value reaches pre-determined number, then judge that magnesium rod is lost.
According to a third aspect of the present invention, it is provided that a kind of water heater, including water tank and any of the above-described described detection dress
Put.
Detection device and method according to the present invention, owing to utilizing described LASER Light Source and described Photoelectric Detection list
The loss of magnesium rod is detected by unit, therefore, it is possible to the loss situation of detection magnesium rod is to be replaced in time, thus has ensured magnesium
Rod is to the cleaning of water in water tank, the effect of playing protection inner bag.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.
Fig. 1 shows the structural representation of the detection device according to the present invention one preferred implementation；
Fig. 2 shows the Cleaning Principle schematic diagram according to detection device of the present invention；
Fig. 3 is the flow chart of the detection method according to the present invention one preferred implementation；
Fig. 4 shows according to the specific embodiment realizing detection method of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described by corresponding accompanying drawing.Obviously, described embodiment is only the present invention one
Section Example rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Below in conjunction with Fig. 1, scheme according to the present invention is described.As described in Figure 1, the present invention provides a kind of water heater
Magnesium rod detection device, the loss situation of the magnesium rod M placed in detecting water-heater water tank W.Described detection device includes: laser
Light source 1, photodetector unit 2 and control unit 3.LASER Light Source 1 sends laser and is irradiated on described magnesium rod M, described magnesium rod
M and described photodetector unit 3 are sequentially arranged on the optical axis O of laser, and described photodetector unit 2 is used for receiving LASER Light Source
Detection after 1 laser sent is radiated on magnesium rod is used up, and output detections signal.Control unit 3 is according to described detection letter
Number judge the loss of described magnesium rod M.Further, this device further preferably includes alarm unit 4, for according to described control unit
The control signal exported according to its judged result is reported to the police.
Above-mentioned detection device according to the present invention and the detection method of realization thereof, it is possible to the loss situation of detection magnesium rod, and
Can remind user that magnesium rod is replaced in time when detecting that magnesium rod has been lost, thus ensure that magnesium rod is to water tank
The cleaning of interior water, play the effect of protection inner bag.Hereinafter each parts of described device are illustrated one by one.
As it is shown in figure 1, described magnesium rod M, such as, it is arranged on bottom water tank W, and is preferably mounted at the middle bottom water tank W
Position.The main product of described magnesium rod M has and meets AZ-31 standard and AZ-63 standard two kinds.Wherein, it will usually in magnesium rod
Between extrude a steel core S, the uniform effect of loss can be played.
Described LASER Light Source 1, for example, semiconductor laser light resource, it is preferably mounted on the inwall of water tank W, so that it sends
Laser be irradiated on described magnesium rod M.Described magnesium rod M and photodetector unit 2 are sequentially arranged in laser along laser direction of advance
On optical axis O.Thus, the laser that LASER Light Source 1 sends, after being irradiated on magnesium rod M, is detected laser by photodetector unit 2 and is shining
Detection after being mapped on magnesium rod M is used up, the radius of the described laser facula radius more than the steel core S of described magnesium rod M.Photoelectric Detection
Unit 2, is preferably mounted on the inwall of water tank M, and its laser sent for detecting LASER Light Source 1 is being irradiated to described magnesium rod M
Light afterwards, and after receiving light, output detections signal is to control unit 3.After effectively reception laser is irradiated on magnesium rod
Detection use up, the capture area of photodetector unit should also be as the diameter more than steel core S.
Specifically, the Cleaning Principle of the present invention is described in conjunction with Fig. 2.Photodetector unit 2 is big according to the light quantity detected
Little, export detect signal corresponding with the size of this light quantity, and the size of this light quantity and/or with or without, corresponding to the loss of magnesium rod M
Situation.In a preferred embodiment, if the radius of described magnesium rod M is R (R diminishes along with the consumption of magnesium rod), rod M is lossless for magnesium
Time-consumingly, R > 1.5r, the radius of steel core S is r, and the spot radius of laser is 1.5r, and the photosurface radius of photodetector unit 2
More than or equal to 1.5r.Then at described magnesium rod M from beginning to use to be lost time (i.e. loss to only remaining steel core S), extent of deterioration and
Photodetector unit 2 is detected signal and the control of the corresponding control unit arranged according to what the light quantity detected exported
The corresponding relation of signal is as shown in table 1 below.Wherein, the size of radius R and steel during the first row of table 1 shows the loss of magnesium rod
The relativity of size r of core S, secondary series shows the change photodetector unit 2 of radius R during being lost corresponding to magnesium rod
Detected light quantity situation, and the degree that is lost according to the magnesium rod detected by photodetector unit of the 3rd row and export
The instruction content of control signal.
It addition, during for 1.5r >=R ＞ r, it is contemplated that R > r, i.e. magnesium rod still have residue, are not lost complete, a side
Face, in order to avoid one occurs the waste that be issued by change magnesium excellent prompting and cause being lost, on the other hand, in order to reserve to user
Necessary replacing construction (such as, buy the time etc. required for new magnesium rod), can arrange a threshold value so that work as Photoelectric Detection
The light quantity that unit 2 receives reaches to a certain degree (showing that the loss of magnesium rod reaches largely, during for example, 1.3r ＞ R ＞ 1.1r)
And when exporting corresponding detection signal more than this threshold value, control unit 3 exports control signal, user is reminded to change magnesium rod.And
Further, if user changes described magnesium rod the most in time, then as R=r, i.e. magnesium rod is exhausted, then export and detect
Detection signal corresponding to maximum amount, control unit 3, after receiving this detection signal, exports control signal, alert device
Fault, can stop the operation of water heater.
Table 1
It is pointed out that the detailed description of the invention given by above table 1, exemplary only, the present invention is not limited to
This.Specifically, for the magnesium rod including steel core, as long as the laser facula radius that LASER Light Source 1 sends is more than described steel
The radius r of core, thus it is complete to be guaranteed in the loss of magnesium rod, during the most remaining described steel core, photodetector unit is able to detect that accordingly
Light quantity, with output detections signal.Specifically, if the radius of described hot spot is more than half when magnesium rod is not lost further
Footpath R, it is minimum that the laser facula that now LASER Light Source 1 sends is received light quantity by photodetector unit 2 after being irradiated to magnesium rod,
Along with the loss of magnesium rod, the light quantity received by photodetector unit 2 will gradually increase, until reaching only to be left described steel core S
Time maximum amount.
Described control unit 3, such as, can be line control machine, its detection signal exported according to described photodetector unit 2,
Output control signal, preferably controls alarm unit 4.Alarm unit 4, such as, be arranged on equipotential on the panel of line control machine or water heater
Put, as described above, send the prompting messages such as sound, light or concrete word, remind user to change magnesium rod, or stop further
The only operation of water heater.
Further, for exclusive PCR so that testing result is relatively reliable, described control unit 3 also includes counting unit
(not shown), when described photodetector unit 2 detects that also output detections signal is used up in described detection, described counting unit
Count value adds 1；If the count value that described control unit judges described counting unit reaches pre-determined number, then export described control and believe
Number.Described counting unit also may not include in described control unit, and exists as another individual components.
Below in conjunction with Fig. 3,4 descriptions detection method according to a preferred embodiment of the invention.Fig. 3 shows according to this
The flow chart of bright detection method；Fig. 4 shows according to the specific embodiment realizing detection method of the present invention.
As it is shown on figure 3, heat described in the loss situation of the magnesium rod M placed in detecting water-heater water tank W of the present invention
The magnesium rod detection method of hydrophone, step S1, reception including irradiating laser detect step S2 of light quantity, judge step S3 of loss
And step S4 that output is reported to the police.Specifically, in step S1 of irradiating laser, laser is utilized to irradiate described magnesium rod M；Receive detection
In step S2 of light quantity, receive the detection after laser is radiated on magnesium rod and use up, and output detections signal；And judge loss
Step S3 in, judge the loss of described magnesium rod M according to described detection signal, and according to the loss situation of magnesium rod, output control
Signal.Preferably, also include the step that output is reported to the police, in step S4 that output is reported to the police, report to the police according to control signal.
Preferably, for exclusive PCR so that testing result is relatively reliable, described counting unit can be set, pre-meeting
The detection determining number of times all shows that when magnesium rod has a certain degree of loss, control unit 3 just exports control signal so that alarm unit
4 report to the police.
A specific embodiment according to detection method of the present invention below described, wherein LASER Light Source 1 spot size,
The example that the parameters such as the radius of magnesium rod radius and optical detecting unit 2 are listed with reference to table 1.As shown in Figure 4, first, water heater opens
Dynamic, described detection device is started working.Initialize detection number of times i=0, it is possible to the detection cycle arranging detection device is 7 days.
For air-source water heater, the 4-5 point in morning that its operating frequency can be selected low is the detection time period, when recording this
The optical signal of photodetector unit detection in section；If being not detected by optical signal in this hour, record i=0, it is judged that for magnesium rod
It is lost the most serious, it is not necessary to change.
If receiving optical signal in this hour, recording i=i+1, tentatively judging that the loss of magnesium rod is serious, however not excluded that interference
Probability.If next working cycle T detects optical signal, record i=i+1, when i >=3, then judge that the loss of magnesium rod is serious.Control
Unit processed sends control signal so that alarm unit 2 is reported to the police, and magnesium rod is replaced by prompting user.If this cycle is not detected
To optical signal, in order to prevent erroneous judgement, then photodetector unit detection light signal number of times i resets, and restarts detection.Further
Ground, if system can't detect laser, show user with having changed, photodetector unit detection light signal number of times i reset,
Restart new detection.
Furthermore, it is contemplated that there is scattering phenomenon in water in laser beam, for improving accuracy of detection, it is possible to use experiment draws
Offset supply institute's difference data amount.
Additionally, the present invention also provides for a kind of water heater, including water tank and above-mentioned detection device.
Above the described detection device and method of the present invention is illustrated.Owing to utilizing described LASER Light Source and institute
State photodetector unit the loss of magnesium rod is detected, therefore, it is possible to the loss situation of detection magnesium rod is to be replaced in time,
Thus ensured that magnesium rod is to the cleaning of water in water tank, the effect of playing protection inner bag.
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.
The above, be only presently preferred embodiments of the present invention, the present invention not makees any pro forma restriction, depends on
Any simple modification, equivalent variations and the modification made above example according to the technical spirit of the present invention, all still falls within this
In the range of bright technical scheme.
Claims (15)
1. a detection device, for detecting the loss of the magnesium rod in water-heater water tank, including:
LASER Light Source, is used for sending laser and is irradiated to described magnesium rod；
Photodetector unit, the excellent and described photodetector unit of described magnesium is sequentially arranged on the optical axis of laser, described smooth electric-examination
Detection after the laser that survey unit sends for receiving LASER Light Source is radiated on magnesium rod is used up, and output detections signal；With
And
Control unit, for judging the loss of described magnesium rod according to described detection signal.
Detect device the most as claimed in claim 1, also include:
Alarm unit, for the judged result output alarm signal according to described control unit.
Detect device the most as claimed in claim 1 or 2, wherein,
Described magnesium rod includes steel core, and the spot radius of described LASER Light Source is more than the radius of described steel core.
4. the detection device as described in any one of claim 1-3, wherein,
When described control unit judges that the detection signal that described photodetector unit exports is more than a threshold value, it is judged that magnesium rod occurs
Loss.
5. the detection device as described in any one of claim 1-4, wherein,
When described control unit judges that the detection signal that described photodetector unit exports reaches maximum, it is judged that described magnesium rod
It has been lost.
Detect device the most as claimed in claim 3, wherein,
If the radius of described magnesium rod is R, the radius of steel core is r, and the spot radius of laser is 1.5r, when magnesium rod is lossless, and R >
1.5r；Then
As R > 1.5r time, the hot spot of laser entirely falls within magnesium rod, and photodetector unit is not received by light quantity, without detection signal
Output, then control unit judges that magnesium rod is lossless；
As 1.5r >=R ＞ r, laser facula part falls on magnesium rod, and photodetector unit detects part light quantity, exports first
Detection signal, according to this first detection signal, control unit judges that magnesium rod is lost；
As R=r, laser facula part falls on magnesium rod, and photodetector unit detects maximum amount, output the second detection letter
Number, according to this second detection signal, control unit judges that magnesium rod has been lost.
7. the detection device as described in any one of claim 1-5, also includes:
Counting unit, when described photodetector unit detects that also output detections signal is used up in described detection, described counting list
The count value of unit adds 1；If the count value that described control unit judges described counting unit reaches pre-determined number, then judge described magnesium
There is loss or be lost in rod.
8. a detection method, for detecting the loss of the magnesium rod in water-heater water tank, including:
Laser is irradiated on described magnesium rod；
Receive the detection after laser is radiated on magnesium rod to use up, and output detections signal；And
The loss of described magnesium rod is judged according to described detection signal.
9. detection method as claimed in claim 8, also includes
Result output alarm signal according to described judgement.
10. detection method as claimed in claim 8 or 9, wherein,
Described magnesium rod includes steel core, and the spot radius of described LASER Light Source is more than the radius of described steel core.
11. detection methods as described in any one of claim 8-10, wherein,
When judging described detection signal more than a threshold value, it is judged that magnesium rod is lost.
12. detection methods as described in any one of claim 8-11, wherein,
When judging that described detection signal reaches maximum, it is judged that described magnesium rod has been lost.
13. detection methods as claimed in claim 10, wherein,
If the radius of described magnesium rod is R, the radius of steel core is r, and the spot radius of laser is 1.5r, when magnesium rod is lossless, and R >
1.5r；Then
As R > 1.5r time, the hot spot of laser entirely falls within magnesium rod, and photodetector unit is not received by light quantity, without detection signal
Output, then judge that magnesium rod is lossless；
As 1.5r >=R ＞ r, laser facula part falls on magnesium rod, and photodetector unit detects part light quantity, exports first
According to this first detection signal, detection signal, then judge that magnesium rod is lost；
As R=r, laser facula part falls on magnesium rod, and photodetector unit detects maximum amount, output the second detection letter
Number, then judge that magnesium rod has been lost according to this second detection signal.
14. detection methods as described in any one of claim 8-12, also include:
Counting step, when detecting that also output detections signal is used up in described detection, count value adds 1；If described count value reaches
Pre-determined number, then judge that magnesium rod occurs loss or has been lost.
15. 1 kinds of water heaters, including: the detection device described in water tank and any one of claim 1-7.
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