CN202938793U - Shield type photoelectric sensor for frost ice on condenser pipe of refrigerator - Google Patents
Shield type photoelectric sensor for frost ice on condenser pipe of refrigerator Download PDFInfo
- Publication number
- CN202938793U CN202938793U CN2012206287961U CN201220628796U CN202938793U CN 202938793 U CN202938793 U CN 202938793U CN 2012206287961 U CN2012206287961 U CN 2012206287961U CN 201220628796 U CN201220628796 U CN 201220628796U CN 202938793 U CN202938793 U CN 202938793U
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- China
- Prior art keywords
- guide hole
- sensor body
- refrigerator
- type photoelectric
- photoelectric sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
Abstract
The utility model relates to a photoelectric sensor and discloses a shield type photoelectric sensor for frost ice on a condenser pipe of a refrigerator. The photoelectric sensor comprises a sensor body which is installed on a condenser evaporating pipe, wherein the sensor body is connected with a signal conditioning circuit; a front face of the sensor body is provided with a groove hole; a frost detection area is formed between the groove hole and a pipe wall of the condenser evaporating pipe; an emitting guide hole and a receiving guide hole are arranged in the sensor body; the emitting guide hole and the receiving guide hole are respectively communicated with the groove hole, and are arranged to be opposite to each other; a light-emitting diode is disposed inside the emitting guide hole, and a photoelectric diode is disposed inside the receiving guide hole; and the light-emitting diode and the photoelectric diode are respectively connected with the signal conditioning circuit through cables. The shield type photoelectric sensor is simple in structure, convenient for installation and low in cost, and can accurately measure thickness of frost on the evaporating pipe in a freezing chamber of the refrigerator in real time.
Description
Technical field
The utility model relates to electro-optical pickoff, has related in particular to a kind of refrigerator condenser pipe rime ice shading type photoelectric sensor.
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 subject to people's favor.Wind cooling refrigerator is to utilize fan to make cold wind forced convection circulation and refrigeration, frozen food indirectly, and due to this refrigeration modes, in refrigerator, the moisture of food evaporation is taken away by cold wind, and freezes to form frost layer in the surface of evaporator by evaporator the time.The existence of frost layer will affect refrigeration performance, the circulation of even blocking air when serious, and energy consumption increases, and the refrigerating effect descends.
When the evaporimeter frosting in the Wind-cooling type refrigerator, because the coefficient of heat conductivity of frost is very low, in case frosting, the frost on evaporator of refrigerator surface can reduce refrigerating efficiency, increases energy consumption.Data shows, when the refrigerator frost thickness reaches 5mm, refrigerating efficiency will reduce by 20%.
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 the immature or high in cost of production reason of technology, is difficult to practice in refrigerator, so since wind cooling refrigerator occurs from the nineties, the never too large improvement of defroster method.
In the international market, also there is no 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 the household electrical appliances market such as refrigerator always.Therefore, be necessary to be optimized for the structure of existing product, with the higher requirement of satisfying the market.
Summary of the invention
The purpose of this utility model is to provide a kind of simple in structure, easy for installation, with low cost, can be used for monitoring the sensor of evaporator surface rime ice thickness in the Wind-cooling type refrigerator.But the frosting thickness of the utility model Real-Time Monitoring installation position, and when surpassing setting value, rime ice thickness provides the refrigerator condenser pipe rime ice shading type photoelectric sensor of defrosting control signal.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
refrigerator condenser pipe rime ice shading type photoelectric sensor, comprise the sensor body that is arranged on the condenser evaporation tube, sensor body is connected with signal conditioning circuit, described sensor body front offers slotted eye, form the frosting detecting area between slotted eye and condenser evaporation tube tube wall, the emission guide hole is set in sensor body and receives light-conductive hole, described emission guide hole and reception guide hole are communicated with slotted eye respectively, and the emission guide hole is oppositely arranged with the reception guide hole, be provided with light emitting diode in the emission guide hole, receive in guide hole photodiode is set, light emitting diode is connected by cable with photodiode and is connected with signal conditioning circuit.
As preferably, described signal conditioning circuit comprises emission driver, amplifier, threshold setting device, comparer, chronotron and controller, and described emission driver is used for providing constant electric current to light emitting diode; Amplifier is used for the photocurrent of photodiode output is amplified, and converts d. c. voltage signal to; Threshold setting device is used for providing stable voltage reference; Comparer is used for judging whether frost thickness exceeds setting value and outputs level signals; Controller is used for controlling the unlatching of defroster and stopping.
As preferably, described sensor body is connected on the condenser evaporation tube by bolt card.
As preferably, but the lead outlet place on described sensor body has the lead-in wire seal groove of sealant pouring and sealing.
Infrared emission tube in sensor is launched infrared light, and during the long-pending frost of evaporation tube surface nothing, utilizing emitted light is received major part by photodiode, and the output current of photodiode is maximum.When on evaporation tube, frosting being arranged, light is blocked, and can be reduced by the light that photodiode receives, and the electric current of photodiode output reduces.Through follow-up signal processing circuit, just the variation of photocurrent can be converted into the variation of output voltage, can prove through a large amount of actual tests, between the frosting thickness on the range of decrease of frost is thick when being 0 to 4mm output voltage and evaporation tube surface, reasonable linear relationship is arranged, just can design signal processing circuit according to test findings, output voltage is converted into frost thick.
The utility model has significant technique effect owing to having adopted above technical scheme:
The utility model is simple in structure, easy for installation, with low cost; Can measure real-time and accurately the frosting thickness on the indoor evaporation tube of refrigerator freezing, can send the defrosting signal when recording frosting thickness greater than setting value, control the high problem of defrosting False Rate thereby change at current refrigerator application timer, reach energy-conservation effect.A large amount of evidences, this sensor has reasonable linear relationship between the frosting thickness of the range of decrease of frost is thick when being 0 to 4mm output voltage and sensor surface, and the white thick curve of output voltage-reality has in test consistance preferably.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is inner structure schematic diagram of the present utility model.
Fig. 3 is the connection diagram of the utility model signal conditioning circuit.
Fig. 4 is the white thick curve synoptic diagram of output voltage of the present utility model-reality.
Embodiment
Below in conjunction with accompanying drawing 1 to accompanying drawing 4 and specific embodiment, the utility model is described in further detail:
Embodiment 1
refrigerator condenser pipe rime ice shading type photoelectric sensor, as shown in Figures 1 to 4, comprise the sensor body 2 that is arranged on condenser evaporation tube 1, sensor body 2 is connected with signal conditioning circuit, described sensor body 2 fronts offer slotted eye 3, form the frosting detecting area between slotted eye 3 and condenser evaporation tube 1 tube wall, sensor body 2 is interior to be arranged emission guide hole 4 and receives light-conductive hole 5, described emission guide hole 4 and reception guide hole 5 are communicated with slotted eye 3 respectively, and emission guide hole 4 is oppositely arranged with reception guide hole 5, be provided with light emitting diode 41 in emission guide hole 4, receive the interior photodiode 51 that arranges of guide hole 5, light emitting diode 41 is connected with photodiode and is connected with signal conditioning circuit by cable respectively.
Signal conditioning circuit comprises emission driver 6, amplifier 7, threshold setting device 8, comparer 9, chronotron 10 and controller 11, and described emission driver 6 is used for providing constant electric current to light emitting diode 41; Amplifier is used for the photocurrent of photodiode 51 outputs is amplified, and converts d. c. voltage signal to; Threshold setting device 8 is used for providing stable voltage reference; Comparer 9 is used for judging whether frost thickness exceeds setting value and outputs level signals; Controller 11 is used for controlling the unlatching of defroster and stopping.
The utility model can be arranged on the interior evaporation tube 1 of Wind-cooling type refrigerator, rime ice thickness on Real-Time Monitoring refrigerator evaporation tube 1, provide the defrosting signal when rime ice thickness during greater than the threshold value set, and the time-delay set time, guarantee that the defroster of refrigerator has the time enough defrosting.Its principle of work is: by the light of light emitting diode 41 emission, except being evaporated on a small quantity pipe 1 blocks, the photodiode 51 that major part all is disposed in the opposite receives; Along with the refrigerator long-play, the frost that condenses on evaporation tube 1 surface is more and more thicker, and it is more and more that the light of light emitting diode 41 emissions is blocked, photodiode 51 receive light more and more a little less than.When evaporation tube 1 surface did not have rime ice, photodiode 51 received the strongest light, and the photocurrent of photodiode 51 outputs is maximum; When evaporation tube 1 surface had rime ice and thickness to change, the light intensity that photodiode 51 receives can change, and the photocurrent of photoelectric diode 51 also can change thereupon; The photocurrent of photoelectric diode 51 amplifies through amplifier 7 and converts the d. c. voltage signal that amplitude changes to, and the voltage threshold of setting with threshold setting device 8 compares; Over predefined value, the d. c. voltage signal amplitude of amplifier 7 outputs is lower than the threshold value of setting when the surperficial rime ice thickness of evaporation tube 1, and comparer 9 is exported high level, and controller 11 starts the defroster work, starts simultaneously chronotron 10 and locks defrosting times; After the rime ice on evaporation tube 1 surface was removed, the d. c. voltage signal amplitude of amplifier 7 outputs was higher than the threshold value of setting, comparer 9 output low levels, and chronotron 10 delay times arrive, and controller 11 stops defroster work.
In a word, the above is only preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (4)
1. refrigerator condenser pipe rime ice shading type photoelectric sensor, comprise the sensor body (2) that is arranged on condenser evaporation tube (1), sensor body (2) is connected with signal conditioning circuit, it is characterized in that: described sensor body (2) front offers slotted eye (3), form the frosting detecting area between slotted eye (3) and condenser evaporation tube (1) tube wall, emission guide hole (4) is set in sensor body (2) and receives light-conductive hole (5), described emission guide hole (4) and reception guide hole (5) are communicated with slotted eye (3) respectively, and emission guide hole (4) is oppositely arranged with reception guide hole (5), be provided with light emitting diode (41) in emission guide hole (4), receive in guide hole (5) photodiode (51) is set, light emitting diode (41) is connected 51 with photodiode) be connected with signal conditioning circuit by cable respectively.
2. refrigerator condenser pipe rime ice shading type photoelectric sensor according to claim 1, it is characterized in that: described signal conditioning circuit comprises emission driver (6), amplifier (7), threshold setting device (8), comparer (9), chronotron (10) and controller (11), and described emission driver (6) is used for providing constant electric current to light emitting diode (41); Amplifier is used for the photocurrent of photodiode (51) output is amplified, and converts d. c. voltage signal to; Threshold setting device (8) is used for providing stable voltage reference; Comparer (9) is used for judging whether frost thickness exceeds setting value and outputs level signals; Controller (11) is used for controlling the unlatching of defroster and stopping.
3. refrigerator condenser pipe rime ice shading type photoelectric sensor according to claim 1, it is characterized in that: described sensor body (2) is connected on condenser evaporation tube (1) by bolt (21).
4. according to claim 1 or 3 described refrigerator condenser pipe rime ice shading type photoelectric sensors is characterized in that: described sensor body (2) but on the lead outlet place have the lead-in wire seal groove (22) of sealant pouring and sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206287961U CN202938793U (en) | 2012-11-26 | 2012-11-26 | Shield type photoelectric sensor for frost ice on condenser pipe of refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206287961U CN202938793U (en) | 2012-11-26 | 2012-11-26 | Shield type photoelectric sensor for frost ice on condenser pipe of refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202938793U true CN202938793U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206287961U Expired - Lifetime CN202938793U (en) | 2012-11-26 | 2012-11-26 | Shield type photoelectric sensor for frost ice on condenser pipe of refrigerator |
Country Status (1)
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| CN (1) | CN202938793U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075525A (en) * | 2014-06-28 | 2014-10-01 | 祖新华 | Energy-saving frostless refrigerator |
| CN104567207A (en) * | 2014-12-31 | 2015-04-29 | 海信容声(广东)冰箱有限公司 | Defrosting sensor, refrigerator and defrosting method |
| CN106500582A (en) * | 2016-11-23 | 2017-03-15 | 合肥市芯海电子科技有限公司 | A kind of solidifying frost detection means of refrigerator condenser type and detection method |
| CN109838757A (en) * | 2017-09-08 | 2019-06-04 | 南京钧乔行汽车灯具有限公司 | A kind of headlight for vehicles cover surface removes accumulated snow method |
| CN114812027A (en) * | 2022-05-19 | 2022-07-29 | 合肥美的电冰箱有限公司 | Defrosting control method, frost layer detection device, evaporator and refrigeration equipment |
-
2012
- 2012-11-26 CN CN2012206287961U patent/CN202938793U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075525A (en) * | 2014-06-28 | 2014-10-01 | 祖新华 | Energy-saving frostless refrigerator |
| CN104075525B (en) * | 2014-06-28 | 2016-10-05 | 祖新华 | Energy-conservation frost-free refrigerator-freezer |
| CN104567207A (en) * | 2014-12-31 | 2015-04-29 | 海信容声(广东)冰箱有限公司 | Defrosting sensor, refrigerator and defrosting method |
| CN106500582A (en) * | 2016-11-23 | 2017-03-15 | 合肥市芯海电子科技有限公司 | A kind of solidifying frost detection means of refrigerator condenser type and detection method |
| CN109838757A (en) * | 2017-09-08 | 2019-06-04 | 南京钧乔行汽车灯具有限公司 | A kind of headlight for vehicles cover surface removes accumulated snow method |
| CN114812027A (en) * | 2022-05-19 | 2022-07-29 | 合肥美的电冰箱有限公司 | Defrosting control method, frost layer detection device, evaporator and refrigeration equipment |
| CN114812027B (en) * | 2022-05-19 | 2023-12-01 | 合肥美的电冰箱有限公司 | Defrosting control method, frost layer detection device, evaporator and refrigeration equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
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| CX01 | Expiry of patent term |