CN101639346A - Photoelectric frost measuring sensor - Google Patents
Photoelectric frost measuring sensor Download PDFInfo
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- CN101639346A CN101639346A CN200910091894A CN200910091894A CN101639346A CN 101639346 A CN101639346 A CN 101639346A CN 200910091894 A CN200910091894 A CN 200910091894A CN 200910091894 A CN200910091894 A CN 200910091894A CN 101639346 A CN101639346 A CN 101639346A
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Abstract
The invention discloses a photoelectric frost measuring sensor which comprises a base, a heat-conducting part, a light transmitter, a light receiver, an upper cover plate and a fixed part, wherein, the base is a flat plate with two bulges, a semi-cylindrical groove is arranged on the bottom side of the flat plate, the thermal conductive part is embedded in the groove of the base, the top of the thermal conductive part extends out of the upper surface of the flat plate of the base, the light transmitter and the light receiver are respectively arranged on the inner sides of the two bulges of thebase, the light transmitter, the light receiver and the upper cover plate are connected into a whole, the upper cover plate is connected with two bulges of the base, and the base is connected with the fixed part. The base is made of insulating, thermal insulating and other materials, and the thermal conductive part is made of thermal conductive materials. The photoelectric frost measuring sensorhas the effects that the photoelectric frost measuring sensor can directly sense the thickness of a frost layer of an air source heat pump unit, a heat pump type room air conditioner and other refrigeration devices, effectively control the defrosting operation of the air source heat pump unit, the heat pump type room air conditioner and other refrigeration devices and further avoid the occurrenceof mis-defrosting accidents of the refrigeration devices.
Description
Technical field
The present invention relates to a kind of photoelectric frost measuring sensor, specifically, is at refrigerating plants such as net for air-source heat pump units, pump type heat room air conditioners, utilizes photoelectric conversion technique to realize the sensor of frost thickness monitoring.
Background technology
Frosting is the key issue that influences refrigerating plant operational efficiency such as net for air-source heat pump units, pump type heat room air conditioner.The existence and the growth of frost layer have increased the heat transfer resistance of refrigerating plant heat interchanger such as net for air-source heat pump units, pump type heat room air conditioner, have reduced heat transfer coefficient, have increased air flow resistance, must be to its control that defrosts.Existing defrosting control method comprises: 1) time defrosting method; 2) heat exchanger surface temperature-time defrosting control method; 3) pressure-temperature defrosting control method; 4) heat exchanger surface rate of temperature change defrosting control method; 5) heat exchanger surface and air temperature difference defrosting control method; 6) artificial intelligence defrosting control method.Above defrosting control method by measuring the variable that influences the frosting process, as temperature, pressure, time etc., as the criterion of defrosting control, and is not the existence and height of measuring the frost layer by direct, as the criterion of defrosting control.Therefore, refrigerating plants such as net for air-source heat pump units, pump type heat room air conditioner " mistake defrosting " accident of " frostless defrosting " and " having frost not remove " often occurs in actual moving process.Causing the reason of refrigerating plants such as net for air-source heat pump units, pump type heat room air conditioner " mistake defrosting " accident is to lack the sensor that can carry out directly frost thickness, accurately monitor.
Summary of the invention
The object of the present invention is to provide a kind of photoelectricity transformation principle that utilizes, be used for the frost measuring sensor of refrigerating plants such as net for air-source heat pump units, pump type heat room air conditioner.
In order to solve the problems of the technologies described above, photoelectric frost measuring sensor provided by the invention, comprise pedestal 1, heat-conducting piece 2, optical transmitting set 3, optical receiver 4, upper cover plate 5 and fixture 6, wherein pedestal 1 is the flat board that has two projectioies, in dull and stereotyped bottom side semi-cylindrical recesses is set, heat-conducting piece 2 is nested in the groove of described pedestal 1, the upper surface of pedestal 1 flat board is stretched out at heat-conducting piece 2 tops, two projectioies at pedestal 1 are inboard, place optical transmitting set 3 and optical receiver 4 respectively, optical transmitting set 3 and optical receiver 4 link into an integrated entity with upper cover plate 5, and upper cover plate 5 is connected with two projectioies of pedestal 1, and pedestal 1 is connected with fixture 6.Described pedestal 1 is materials such as insulation, thermal insulation, and described heat-conducting piece 2 is a heat-conducting.
The invention has the beneficial effects as follows: (1) can effectively control Defrosting of Refrigerating Plant operations such as net for air-source heat pump units, pump type heat room air conditioner; (2) can avoid refrigerating plants such as net for air-source heat pump units, pump type heat room air conditioner " to miss and defrost " generation of accident; (3) output voltage signal " 0-1 " characteristic sensitivity, repeatable strong; (4) simple to operate, applicability is stronger.
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Description of drawings
Fig. 1 is the structural representation of photoelectric frost measuring sensor of the present invention;
Among the figure, 1-pedestal, 2-heat-conducting piece, 3-optical transmitting set, 4-optical receiver, 5-upper cover plate, 6-fixture.
Embodiment
From embodiments of the present invention shown in Figure 1 as can be known, photoelectric frost measuring sensor mainly comprises pedestal 1, heat-conducting piece 2, optical transmitting set 3, optical receiver 4, upper cover plate 5 and fixture 6.
Wherein pedestal 1 can be made by bakelite, is the flat board that has two projectioies, and it is the 3mm semi-cylindrical recesses that radius is set in dull and stereotyped bottom side, and the material of described pedestal 1 also can be plastics.The material of heat-conducting piece 2 can be copper, and heat-conducting piece 2 is nested in the semi-cylindrical recesses of pedestal 1, and the upper surface of pedestal 1 flat board is stretched out at heat-conducting piece 2 tops, and the material of described heat-conducting piece 2 also can be aluminium.Two projectioies at pedestal 1 are inboard, place optical transmitting set 3 and optical receiver 4 respectively, and optical transmitting set 3 and optical receiver 4 link into an integrated entity with upper cover plate 5, and upper cover plate 5 is connected with two projectioies of pedestal 1, and pedestal 1 is connected with fixture 6.
Utilize fixture 6 that pedestal 1 is fixed on the heat exchange manifold, heat-conducting piece 2 is closely contacted with exchanger tube wall, when the exchanger tube wall frosting, the also frosting of the top of heat-conducting piece 2, step evolution fluctuation will take place in the output voltage of optical receiver 4 this moment, fluctuate according to this step evolution and can judge that refrigerating plants such as net for air-source heat pump units, pump type heat room air conditioner should carry out defrost operation.
Claims (3)
1. photoelectric frost measuring sensor, comprise pedestal, heat-conducting piece, optical transmitting set, optical receiver, upper cover plate and fixture, it is characterized in that, described pedestal (1) is the flat board that has two projectioies, in dull and stereotyped bottom side semi-cylindrical recesses is set, heat-conducting piece (2) is nested in the groove of pedestal (1), the dull and stereotyped upper surface of pedestal (1) is stretched out at heat-conducting piece (2) top, inboard in two projectioies of pedestal (1), place optical transmitting set (3) and optical receiver (4) respectively, optical transmitting set (3) and optical receiver (4) link into an integrated entity with upper cover plate (5), and upper cover plate (5) is connected with two projectioies of pedestal (1), and pedestal (1) is connected with fixture (6).
2. photoelectric frost measuring sensor according to claim 1 is characterized in that, described pedestal (1) is insulation, adiabatic material.
3. photoelectric frost measuring sensor according to claim 1 is characterized in that, described heat-conducting piece (2) is a heat-conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910091894A CN101639346A (en) | 2009-08-28 | 2009-08-28 | Photoelectric frost measuring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910091894A CN101639346A (en) | 2009-08-28 | 2009-08-28 | Photoelectric frost measuring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101639346A true CN101639346A (en) | 2010-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910091894A Pending CN101639346A (en) | 2009-08-28 | 2009-08-28 | Photoelectric frost measuring sensor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011015133A1 (en) * | 2009-08-04 | 2011-02-10 | 珠海格力电器股份有限公司 | Frost detection device, heat pump air conditioner and defrost control method thereof |
| CN102102926A (en) * | 2011-01-30 | 2011-06-22 | 江苏省精创电气股份有限公司 | Evaporator frosting comprehensive judging method |
| CN102278865A (en) * | 2011-05-27 | 2011-12-14 | 吴法理 | Photoelectric-type frost ice sensing controller of refrigerator |
| CN103062967A (en) * | 2013-01-28 | 2013-04-24 | 天津商业大学 | Intelligent defrosting controller |
| KR101375012B1 (en) | 2012-06-21 | 2014-03-20 | 한국교통대학교산학협력단 | Frost sensing device and method |
| CN106247708A (en) * | 2016-08-04 | 2016-12-21 | 珠海格力电器股份有限公司 | A kind of defrosting control method and device |
| 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 |
-
2009
- 2009-08-28 CN CN200910091894A patent/CN101639346A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011015133A1 (en) * | 2009-08-04 | 2011-02-10 | 珠海格力电器股份有限公司 | Frost detection device, heat pump air conditioner and defrost control method thereof |
| CN102102926A (en) * | 2011-01-30 | 2011-06-22 | 江苏省精创电气股份有限公司 | Evaporator frosting comprehensive judging method |
| CN102102926B (en) * | 2011-01-30 | 2013-01-23 | 江苏省精创电气股份有限公司 | Evaporator frosting comprehensive judging method |
| CN102278865A (en) * | 2011-05-27 | 2011-12-14 | 吴法理 | Photoelectric-type frost ice sensing controller of refrigerator |
| KR101375012B1 (en) | 2012-06-21 | 2014-03-20 | 한국교통대학교산학협력단 | Frost sensing device and method |
| CN103062967A (en) * | 2013-01-28 | 2013-04-24 | 天津商业大学 | Intelligent defrosting controller |
| CN103062967B (en) * | 2013-01-28 | 2015-03-11 | 天津商业大学 | Intelligent defrosting controller |
| CN106247708A (en) * | 2016-08-04 | 2016-12-21 | 珠海格力电器股份有限公司 | A kind of defrosting control method and device |
| CN106247708B (en) * | 2016-08-04 | 2018-10-23 | 珠海格力电器股份有限公司 | A kind of defrosting control method and device |
| 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 |
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Open date: 20100203 |