CN102278865A - Photoelectric-type frost ice sensing controller of refrigerator - Google Patents
Photoelectric-type frost ice sensing controller of refrigerator Download PDFInfo
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- CN102278865A CN102278865A CN2011101393926A CN201110139392A CN102278865A CN 102278865 A CN102278865 A CN 102278865A CN 2011101393926 A CN2011101393926 A CN 2011101393926A CN 201110139392 A CN201110139392 A CN 201110139392A CN 102278865 A CN102278865 A CN 102278865A
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Abstract
The invention relates to a photoelectric-type sensor, and discloses a photoelectric-type frost ice sensing controller of an air-cooling-type refrigerator. The controller comprises a controller body which is installed on an evaporator pipe fitting of the air-cooling-type refrigerator; the controller body is connected with a signal conditioning circuit; the controller body is internally provided with a transmitting light guide hole, a receiving light guide hole and a lead seal groove; the open pore part of the transmitting light guide hole and the open pore part of the receiving light guide hole are respectively provided with two transparent seal plates; the controller body is provided with a detection panel; the surface of each transparent seal plate is flush with the detection panel; the transmitting light guide hole is internally provided with a light emitting diode; the receiving light guide hole is internally provided with a photoelectric diode; cable wires are welded on the electrodes of the light emitting diode and the photoelectric diode, and are connected with the signal conditioning circuit. The controller provided by the invention has a simple structure, is convenient to install, and has low cost, the problem of high false judgment rate of frost removal which is controlled by using a timer for the existing refrigerator is changed, and the energy conservation efficacy is achieved.
Description
Technical field
The present invention relates to a kind of electro-optical pickoff, related in particular to a kind of Wind-cooling type refrigerator photo-electric rime ice sensing controler.
Background technology
Along with the raising of people's living standard with to the requirement of life comfort level, wind cooling refrigerator more and more is subjected to people's favor, wind cooling refrigerator is to utilize fan to make cold wind forced convection circulation and refrigeration, frozen food indirectly, because this refrigeration modes, the food moisture evaporated is taken away by cold wind in the refrigerator, and freezes to form white layer in the surface of evaporimeter by evaporimeter the time.The existence of frost layer rings scape to refrigeration performance, even blocks the circulation of air.
When the evaporimeter frosting in the Wind-cooling type refrigerator, because the thermal conductivity factor of frost is very low, in case frosting, the frost on evaporator of refrigerator surface can reduce refrigerating efficiency, increases consumes energy.Data shows, will reduce by 20% refrigerating efficiency when the refrigerator frost thickness reaches 5mm.
At present, domestic refrigerator, intelligent defrosting are only used on wind cooling refrigerator to some extent, and are to use timer to control defrosting, can't realize the best defrosting mode of operation of " the frost defrosting is arranged, frostless do not defrost ", and its False Rate are higher.
Domestic rime ice detection technique is subject to reasons such as the immature or cost height of technology, is difficult in practice in the refrigerator, so from the nineties since wind cooling refrigerator occurs, the never too big improvement of defroster method.In the international market, also still there is not good defroster solution.In Australia, infrared checkout equipment is being used in the frost detecting thickness, but price is high, fails to be applied to household electrical appliances market such as refrigerator always.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, easy for installation, with low cost, can monitor the frosting thickness of installation position in real time, and when rime ice thickness surpasses setting value, provide the refrigerator photo-electric rime ice sensing controler of defrosting control signal.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
Refrigerator photo-electric rime ice sensing controler, comprise the controller body that is installed on the Wind-cooling type evaporator of refrigerator pipe fitting, the controller body links to each other with signal conditioning circuit, be provided with the emission light-conductive hole in the controller body, receive light-conductive hole and lead-in wire seal groove, the tapping of emission light-conductive hole and reception light-conductive hole is respectively arranged with two printing opacity sealing plates, the controller body is provided with the detection panel, described printing opacity sealing plate surface flushes with the detection panel, be provided with light emitting diode in the emission light-conductive hole, receive in the light-conductive hole and be provided with photodiode, electrode on light emitting diode and the photodiode welds cable, and links to each other with signal conditioning circuit.
As preferably, described signal conditioning circuit comprises emission driver, amplifier, threshold setting device, comparator and controller, and described emission driver is used for providing constant current to light emitting diode; Amplifier is used for photoelectric current with photodiode output and amplifies and convert d. c. voltage signal to; Threshold setting device is used to the voltage reference that provides stable; Comparator is used to judge whether frost thickness exceeds setting value and outputs level signals; Controller is used to control frost removal.
As preferably, an end of described controller body is provided with draw-in groove and fastening bolt, and described controller body is connected on the Wind-cooling type evaporator of refrigerator pipe fitting.
As preferably, described printing opacity sealing plate is the light-passing plastic sheet.
As preferably, form angle between the upright side walls of described detection panel and controller body less than 90 degree.
The light that the light emitting diode of refrigerator photo-electric rime ice sensing controler is launched through the transmission of emission light-conductive hole, sees through the printing opacity sealing plate and arrives sensor detection panel.When sensor detection panel surface does not have rime ice, emission light will be injected in the air.When on the sensor detection panel surface rime ice being arranged, light takes place in the rime ice layer such as a series of effects such as reflection, scattering, transmission, absorptions, wherein scattered light in the rime ice layer and reverberation see through the printing opacity sealing plate, through receiving light-conductive hole, act on the photodiode, photodiode converts the light intensity signal that receives to photo-signal, by signal conditioning circuit amplification, comparison process.
The size of photodiode output photoelectric current is relevant with the rime ice thickness that sensor is surveyed panel surface; Actual tests is verified, when rime ice thickness is 0 ~ 5mm, the amplitude of the amplifier output voltage in the signal conditioning circuit, and between the rime ice thickness on the sensor detection panel one-to-one relationship is arranged, the passing threshold setting apparatus can be set the rime ice thickness that defrosting needs, the rime ice thickness of surveying panel surface when sensor is during greater than preset threshold, the comparator output low level, and controller starts defrosting; When the rime ice of sensor detection panel surface is removed, comparator output high level, controller stops defrosting.
The present invention has significant technique effect owing to adopted above technical scheme:
This device can be measured the rime ice thickness on the evaporimeter pipe fitting in the freezer compartment of refrigerator in real time, exactly, can start frost removal when recording frosting thickness greater than setting value defrosts, after rime ice is removed, controlled stop is ended the work of frost removal, thereby change current refrigerator and use the high problem of False Rate that timer is controlled the defrosting generation, can reach effect of saving energy, have very high practicality.
Description of drawings
Fig. 1 is an assembly structure schematic diagram of the present invention.
Fig. 2 is an internal structure schematic diagram of the present invention.
Fig. 3 is a signal conditioning circuit block diagram of the present invention.
Fig. 4 is amplifier output voltage value of the present invention and rime ice thickness relationship figure.
Fig. 5 is a signal conditioning circuit schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing 1 to accompanying drawing 5 and specific embodiment the present invention is described in further detail:
Refrigerator photo-electric rime ice sensing controler, extremely shown in Figure 5 as Fig. 1, comprise the controller body 2 that is installed on the Wind-cooling type evaporator of refrigerator pipe fitting 1, controller body 2 links to each other with signal conditioning circuit, be provided with emission light-conductive hole 3 in the controller body 2, receive light-conductive hole 4 and lead-in wire seal groove 5, lead-in wire seal groove 5 is at the lead outlet place of sensor, but sealant pouring and sealing; The tapping of emission light-conductive hole 3 and reception light-conductive hole 4 is respectively arranged with two light-passing plastic sheets 6, light-passing plastic sheet 6 can stick with glue to be connected on and survey in panel 7 corresponding grooves, controller body 2 is provided with surveys panel 7, light-passing plastic sheet 6 surfaces flush with detection panel 7, be provided with light emitting diode 31 in the emission light-conductive hole 3, receive in the light-conductive hole 4 and be provided with photodiode 41, the electrode 51 on light emitting diode 31 and the photodiode 41 welds cables, and links to each other with signal conditioning circuit.
Signal conditioning circuit comprises emission driver 8, amplifier 9, threshold setting device 10, comparator 11 and controller 12, and described emission driver 8 is used for providing constant current to light emitting diode 31; Amplifier 9 is used for photoelectric current with photodiode 41 output and amplifies and convert d. c. voltage signal to; Threshold setting device 10 is used to the voltage reference that provides stable; Comparator 11 is used to judge whether frost thickness exceeds setting value, when the amplitude of the d. c. voltage signal of amplifier 9 output less than threshold setting device 10 preset threshold, show that rime ice thickness exceeds setting value, comparator 11 output low level signals, controller 12 starts defrosting; When the amplitude of the d. c. voltage signal of amplifier 9 output greater than threshold setting device 10 preset threshold, show that rime ice is removed, comparator 11 output high level signals, controller 12 stops defrosting; Controller 12 is used for controlling the existing frost removal 13 of refrigerator.
One end of controller body 2 also is provided with draw-in groove 21 and fastening bolt 22, and described controller body 2 is connected on the Wind-cooling type evaporator of refrigerator pipe fitting 1.
Form angles between the upright side walls 18 of detection panel 7 and controller body 2 less than 90 degree.
As can be seen from Figure 4, the rime ice thickness on the sensor detection panel of the present invention and the voltage output value of comparator 11 are single corresponding relation.According to shown in Figure 4, the rime ice thickness threshold value that each need be set, all corresponding voltage threshold can be set by the threshold setting device in the signal conditioning circuit 10.
Can measure the rime ice thickness on the evaporimeter pipe fitting in the freezer compartment of refrigerator in real time, exactly by this device, can start frost removal when recording frosting thickness greater than setting value defrosts, after rime ice is removed, controlled stop is ended the work of frost removal, thereby change current refrigerator and use the high problem of False Rate that timer is controlled the defrosting generation, can reach effect of saving energy, have very high practicality.
In a word, the above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (5)
1. refrigerator photo-electric rime ice sensing controler, comprise the controller body (2) that is installed on the Wind-cooling type evaporator of refrigerator pipe fitting (1), it is characterized in that: described controller body (2) links to each other with signal conditioning circuit, be provided with emission light-conductive hole (3) in the controller body (2), receive light-conductive hole (4) and lead-in wire seal groove (5), the tapping of emission light-conductive hole (3) and reception light-conductive hole (4) is respectively arranged with two printing opacity sealing plates (6), controller body (2) is provided with surveys panel (7), described printing opacity sealing plate (6) surface flushes with detection panel (7), be provided with light emitting diode (31) in the emission light-conductive hole (3), receive in the light-conductive hole (4) and be provided with photodiode (41), electrode on light emitting diode (31) and the photodiode (41) welds cable, and links to each other with signal conditioning circuit.
2. refrigerator photo-electric rime ice sensing controler according to claim 1, it is characterized in that: described signal conditioning circuit comprises emission driver (8), amplifier (9), threshold setting device (10), comparator (11) and controller (12), and described emission driver (8) is used for providing constant current to light emitting diode (31); Amplifier (9) is used for photoelectric current with photodiode (41) output and amplifies and convert d. c. voltage signal to; Threshold setting device (10) is used to the voltage reference that provides stable; Comparator (11) is used to judge whether frost thickness exceeds setting value and outputs level signals; Controller (12) is used to control frost removal.
3. refrigerator photo-electric rime ice sensing controler according to claim 1, it is characterized in that: an end of described controller body (2) is provided with draw-in groove (21) and fastening bolt (22), and described controller body (2) is connected on the Wind-cooling type evaporator of refrigerator pipe fitting (1).
4. refrigerator photo-electric rime ice sensing controler according to claim 1 is characterized in that: described printing opacity sealing plate (6) is the light-passing plastic sheet.
5. refrigerator photo-electric rime ice sensing controler according to claim 1 is characterized in that: form the angle less than 90 degree between the upright side walls of described detection panel (7) and controller body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101393926A CN102278865A (en) | 2011-05-27 | 2011-05-27 | Photoelectric-type frost ice sensing controller of refrigerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101393926A CN102278865A (en) | 2011-05-27 | 2011-05-27 | Photoelectric-type frost ice sensing controller of refrigerator |
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| CN102278865A true CN102278865A (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101393926A Pending CN102278865A (en) | 2011-05-27 | 2011-05-27 | Photoelectric-type frost ice sensing controller of refrigerator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528340A (en) * | 2013-09-30 | 2014-01-22 | 合肥晶弘电器有限公司 | Air-cooling refrigerator intelligent defrosting entry point control device and method |
| CN105972887A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water defrosting device for air cooler |
| CN105972891A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water anti-freezing defrosting device of air cooler |
| CN105972889A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water defrosting air cooler |
| CN106091502A (en) * | 2016-06-23 | 2016-11-09 | 刘滕军 | Automatic induction hot water frost-proof air cooler |
Citations (7)
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| US4232528A (en) * | 1978-03-16 | 1980-11-11 | Emerson Electric Co. | Frost detector |
| GB2143945A (en) * | 1983-07-26 | 1985-02-20 | Agriculture Fisheries And Food | Frost sensor |
| CN1035716A (en) * | 1988-03-07 | 1989-09-20 | 焦晓青 | Defrostingsensor for refrigerating system |
| JP2001188970A (en) * | 1999-12-28 | 2001-07-10 | Optex Co Ltd | Infrared sensor |
| US20090235679A1 (en) * | 2008-03-21 | 2009-09-24 | Jeffrey Bagley | Optical frost detector with gas blow off |
| CN101634509A (en) * | 2009-08-03 | 2010-01-27 | 北京工业大学 | System and method for realizing defrosting control by photoelectric conversion |
| CN101639346A (en) * | 2009-08-28 | 2010-02-03 | 北京工业大学 | Photoelectric frost measuring sensor |
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2011
- 2011-05-27 CN CN2011101393926A patent/CN102278865A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4232528A (en) * | 1978-03-16 | 1980-11-11 | Emerson Electric Co. | Frost detector |
| GB2143945A (en) * | 1983-07-26 | 1985-02-20 | Agriculture Fisheries And Food | Frost sensor |
| CN1035716A (en) * | 1988-03-07 | 1989-09-20 | 焦晓青 | Defrostingsensor for refrigerating system |
| JP2001188970A (en) * | 1999-12-28 | 2001-07-10 | Optex Co Ltd | Infrared sensor |
| US20090235679A1 (en) * | 2008-03-21 | 2009-09-24 | Jeffrey Bagley | Optical frost detector with gas blow off |
| CN101634509A (en) * | 2009-08-03 | 2010-01-27 | 北京工业大学 | System and method for realizing defrosting control by photoelectric conversion |
| CN101639346A (en) * | 2009-08-28 | 2010-02-03 | 北京工业大学 | Photoelectric frost measuring sensor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528340A (en) * | 2013-09-30 | 2014-01-22 | 合肥晶弘电器有限公司 | Air-cooling refrigerator intelligent defrosting entry point control device and method |
| CN103528340B (en) * | 2013-09-30 | 2016-07-06 | 合肥晶弘电器有限公司 | The intelligent defrosting point of penetration of a kind of wind cooling refrigerator controls device and control method |
| CN105972887A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water defrosting device for air cooler |
| CN105972891A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water anti-freezing defrosting device of air cooler |
| CN105972889A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water defrosting air cooler |
| CN106091502A (en) * | 2016-06-23 | 2016-11-09 | 刘滕军 | Automatic induction hot water frost-proof air cooler |
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Application publication date: 20111214 |