CN101634509A - System and method for realizing defrosting control by photoelectric conversion - Google Patents
System and method for realizing defrosting control by photoelectric conversion Download PDFInfo
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- CN101634509A CN101634509A CN200910090716A CN200910090716A CN101634509A CN 101634509 A CN101634509 A CN 101634509A CN 200910090716 A CN200910090716 A CN 200910090716A CN 200910090716 A CN200910090716 A CN 200910090716A CN 101634509 A CN101634509 A CN 101634509A
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Abstract
The invention discloses a system and a method for realizing defrosting control of refrigerating devices such as an air source heat pump unit, a heat pump room air conditioner, and the like. The invention adopts the technical scheme that photoelectric sensors, each of which comprises an emitter and a receiver, are arranged on both sides of a refrigerating device so as to be used for defrosting; a current source is connected with the emitter and used for inputting current to the emitter; the receiver is used for receiving an optical signal output by the emitter and converting the optical signal into a voltage signal; a voltage signal collector is connected with the receiver and used for receiving the voltage signal converted by the receiver; and a defrosting controller starts or stops a defrosting operation according to the voltage signal obtained by the voltage signal collector. The method can effectively control the defrosting operations of the refrigerating devices such as the air source heat pump unit, the heat pump room air conditioner, and the like and can avoid mistaken defrosting accidents. The output voltage signal has sensitive 0-1 characteristic and repeatability. The invention has simple operation and stronger applicability.
Description
Technical field
The present invention relates to a kind of opto-electronic conversion defrosting control method, 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 method for defrosting control.
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 exchangers 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.The consequence that " mistake defrosting " causes not only shows aspects such as energy waste, heat supply deficiency and indoor thermal comfort reduction; also can occur high side pressure when serious and surpass system high pressure protection value; compressor horsepower sharply rises, the serious accident that causes compressor to burn.
Summary of the invention
The present invention has overcome shortcoming of the prior art, refrigerating plant defrosting control methods such as a kind of net for air-source heat pump units of utilizing photoelectricity transformation principle, pump type heat room air conditioner are provided, this method is directly controlled criterion with white layer height as defrosting, Defrosting of Refrigerating Plant operations such as net for air-source heat pump units, pump type heat room air conditioner can be effectively controlled, and the appearance of above equipment " mistake defrosting " accident can be avoided.
For solving the technical problem of above-mentioned existence, the present invention adopts following technical proposals: a kind of opto-electronic conversion defrost control system, to comprise that the photoelectric sensor of transmitter and receiver is arranged in the heat exchanger surface both sides of the refrigerating plant of intending defrosting, transmitter and receiver are positioned over same linear position, to guarantee that the signal that transmitter sends can be received by receiver fully, current source links to each other with transmitter, and be the transmitter input current, the optical signal that the transmitter that receiver receives sends also converts thereof into voltage signal, the voltage signal acquisition instrument is connected with receiver, and receive by the voltage signal after its conversion, defrost controller starts or stops defrost operation according to the voltage signal that the voltage signal acquisition instrument obtains.
A kind of opto-electronic conversion defrosting control method provided by the invention comprises the steps:
1) utilizes current source to import the electric current of 5mA～20mA, transmitter is produced and the emission optical signal to transmitter;
2) optical signal passes the frost layer, be received by the receiver, and receiver is converted into the voltage signal of 0.0V～9.0V;
3) the voltage signal acquisition instrument is gathered by the voltage signal after the receiver conversion;
4) defrost controller is judged the thickness of frost layer according to the voltage signal of voltage signal acquisition instrument acquisition, and then determines startup or stop defrost operation.
In above-mentioned steps 4) described in the judgement method that starts or stop defrost operation specifically comprise:
A) input current when transmitter (1) is 5mA～20mA, and the voltage signal that obtains of voltage signal acquisition instrument (5) is when being 8.0V～9.0V, and defrost controller (6) starts defrost operation;
B) input current when transmitter (1) is 5mA～20mA, and the voltage signal that obtains of voltage signal acquisition instrument (5) is when being 0.0V～6.5V, and defrost controller (6) stops defrost operation.
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 the accompanying drawing and the specific embodiment the present invention is described in further detail:
Description of drawings
Fig. 1 is the technical schematic diagram of opto-electronic conversion defrosting control method of the present invention;
Among the figure, 1-photoelectric sensor transmitter, 2-photoelectric sensor receiver, 3-air source heat pump, pump type heat room air conditioner heat exchanger, 4-current source, 5-voltage signal acquisition instrument, 6-defrost controller.
The specific embodiment
Among Fig. 1, the photoelectric sensor that will comprise transmitter 1 and receiver 2 is arranged in net for air-source heat pump units, the frost layer both sides on heat exchanger 3 surfaces of refrigerating plants such as pump type heat room air conditioner, transmitter 1 is positioned over same linear position with receiver 2, to guarantee that the signal that transmitter 1 sends can be received by receiver 2 fully, behind transmitter 1 input current of current source 4 in photoelectric sensor, transmitter 1 will be launched optical signal to receiver 2, the voltage signal that receiver 2 converts the optical signal that receives to, defrost controller 6 is gathered and exported to this voltage signal by voltage signal acquisition instrument 5, defrost controller 6 is judged and whether is defrosted according to voltage signal intensity.
When the 1 input 5mA of the transmitter in the photoelectric sensor, under frostless situation, the output voltage signal of receiver 2 is 6.5V; Between transmitter in the photoelectric sensor 1 and receiver 2, covered by the frost layer fully, the output voltage signal of receiver 2 is 9.0V, and defrost controller 6 can be judged the defrosting beginning according to the 9.0V voltage strength, according to the 6.5V voltage strength, judge that defrosting finishes or need not to defrost.
When the 1 input 10mA of the transmitter in the photoelectric sensor, under frostless situation, the output voltage signal of receiver 2 is 4.5V; Between transmitter in the photoelectric sensor 1 and receiver 2, covered by the frost layer fully, the output voltage signal of receiver 2 is 8.0V, and defrost controller 6 can be judged the defrosting beginning according to the 8.0V voltage strength, according to the 4.5V voltage strength, judge that defrosting finishes or need not to defrost.
When 1 input 15mA of the transmitter in the photoelectric sensor or 20mA, under frostless situation, the output voltage signal of receiver 2 is 0.0V; Between transmitter in the photoelectric sensor 1 and receiver 2, covered by the frost layer fully, the output voltage signal of receiver 2 is 8.5V, and defrost controller 6 can be judged the defrosting beginning according to the 8.5V voltage strength, according to the 0.0V voltage strength, judge that defrosting finishes or need not to defrost.
Claims (3)
1, a kind of opto-electronic conversion defrost control system, it is characterized in that being arranged in the surperficial both sides of heat exchanger (3) of the refrigerating plant of intending defrosting at the photoelectric sensor that will comprise transmitter (1) and receiver (2), transmitter (1) is positioned over same linear position with receiver (2), to guarantee that the signal that transmitter (1) sends can be received by receiver (2) fully, current source (4) links to each other with transmitter (1), and be transmitter (1) input current, the optical signal that the transmitter (1) that receiver (2) receives sends also converts thereof into voltage signal, voltage signal acquisition instrument (5) is connected with receiver (2), and receive by the voltage signal after its conversion, defrost controller (6) starts or stops defrost operation according to the voltage signal that voltage signal acquisition instrument (5) obtains.
2, a kind of opto-electronic conversion defrosting control method is characterized in that comprising the steps:
1) utilizes the electric current of current source (4), transmitter (1) is produced and the emission optical signal to transmitter (1) input 5mA～20mA;
2) optical signal passes the frost layer, is received device (2) and receives, and be received the voltage signal that device (2) converts 0.0V～9.0V to;
3) voltage signal acquisition instrument (5) is gathered by the voltage signal after receiver (2) conversion;
4) defrost controller (6) is judged the thickness of frost layer according to the voltage signal of voltage signal acquisition instrument (5) acquisition, and then determines startup or stop defrost operation.
3, a kind of opto-electronic conversion defrosting control method according to claim 2 is characterized in that: the method that starts or stop defrost operation in the judgement described in the step 4) specifically comprises:
A) input current when transmitter (1) is 5mA～20mA, and the voltage signal that obtains of voltage signal acquisition instrument (5) is when being 8.0V～9.0V, and defrost controller (6) starts defrost operation;
B) input current when transmitter (1) is 5mA～20mA, and the voltage signal that obtains of voltage signal acquisition instrument (5) is when being 0.0V～6.5V, and defrost controller (6) stops defrost operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910090716A CN101634509A (en) | 2009-08-03 | 2009-08-03 | System and method for realizing defrosting control by photoelectric conversion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910090716A CN101634509A (en) | 2009-08-03 | 2009-08-03 | System and method for realizing defrosting control by photoelectric conversion |
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| CN101634509A true CN101634509A (en) | 2010-01-27 |
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| CN200910090716A Pending CN101634509A (en) | 2009-08-03 | 2009-08-03 | System and method for realizing defrosting control by photoelectric conversion |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278865A (en) * | 2011-05-27 | 2011-12-14 | 吴法理 | Photoelectric-type frost ice sensing controller of refrigerator |
| CN105972887A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water defrosting device for air cooler |
| CN105972886A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction electric heating defrosting device for air cooler |
| CN105972889A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Auto-induction hot water defrosting air cooler |
| CN105972888A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction electric heating defrosting air cooler |
| CN105972891A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot-water anti-freezing defrosting device for air cooler |
| CN106091502A (en) * | 2016-06-23 | 2016-11-09 | 刘滕军 | Automatically sensing hot water antifreeze defrost air-cooler |
| CN107166679A (en) * | 2017-06-22 | 2017-09-15 | 广东工业大学 | A kind of frosting cloud test method and system |
| CN114234520A (en) * | 2021-12-21 | 2022-03-25 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting control method thereof |
-
2009
- 2009-08-03 CN CN200910090716A patent/CN101634509A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278865A (en) * | 2011-05-27 | 2011-12-14 | 吴法理 | Photoelectric-type frost ice sensing controller of refrigerator |
| CN105972887A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot water defrosting device for air cooler |
| CN105972886A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction electric heating defrosting device for air cooler |
| CN105972889A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Auto-induction hot water defrosting air cooler |
| CN105972888A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction electric heating defrosting air cooler |
| CN105972891A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction hot-water anti-freezing defrosting device for air cooler |
| CN106091502A (en) * | 2016-06-23 | 2016-11-09 | 刘滕军 | Automatically sensing hot water antifreeze defrost air-cooler |
| CN107166679A (en) * | 2017-06-22 | 2017-09-15 | 广东工业大学 | A kind of frosting cloud test method and system |
| CN114234520A (en) * | 2021-12-21 | 2022-03-25 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting control method thereof |
| CN114234520B (en) * | 2021-12-21 | 2023-12-29 | 海信冰箱有限公司 | Refrigerator and defrosting control method thereof |
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Open date: 20100127 |