CN201488421U - Photoelectric conversion defrost control system - Google Patents
Photoelectric conversion defrost control system Download PDFInfo
- Publication number
- CN201488421U CN201488421U CN2009202222947U CN200920222294U CN201488421U CN 201488421 U CN201488421 U CN 201488421U CN 2009202222947 U CN2009202222947 U CN 2009202222947U CN 200920222294 U CN200920222294 U CN 200920222294U CN 201488421 U CN201488421 U CN 201488421U
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- defrost
- receiver
- heat pump
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- Defrosting Systems (AREA)
Abstract
The utility model discloses a system for achieving defrost control to an air source heat pump unit, a heat pump type room air conditioner and the like by utilizing a photoelectric conversion principle. The utility model adopts the technical scheme that photoelectric sensors which respectively comprises a transmitter and a receive are arranged on two sides of the surface of a heat exchanger for a refrigerating device for defrost; a current source is connected with the transmitter and used for inputting current for the transmitter; the receiver is used for receiving an optical signal transmitted by the transmitter and converting the optical signal into a voltage signal; a voltage signal acquisition instrument is connected with a receiver and used for receiving a voltage signal converted by the voltage signal acquisition instrument; and a defrost controller is used for starting or stopping defrost operation according to the voltage signal obtained by the voltage signal acquisition instrument. The defrost operation of the air source heat pump unit, the heat pump type room air conditioner and other refrigerating devices can be effectively controlled by utilizing the system, and the occurrence of false defrost accidents of the refrigerating device can be avoided. The utility model has the advantages of sensitive characteristics of output voltage signal 0-1, repeatability, simple operation and stronger applicability.
Description
Technical field
The utility model relates to a kind of opto-electronic conversion defrost control system, 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 system of 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.
The utility model content
The purpose of this utility model is to provide refrigerating plant defrost control systems such as a kind of net for air-source heat pump units of utilizing photoelectricity transformation principle, pump type heat room air conditioner, this system directly controls 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 utility model 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.
The opto-electronic conversion defrost control system that utilizes the utility model to provide, can realize the start and stop of defrost operation according to following 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 beneficial effects of the utility model are: (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 utility model is described in further detail:
Description of drawings
Fig. 1 is the structural representation of the utility model opto-electronic conversion defrost control system;
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
By embodiment of the present utility model shown in Figure 1 as can be known, the photoelectric sensor that comprises 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 (1)
1. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202222947U CN201488421U (en) | 2009-09-04 | 2009-09-04 | Photoelectric conversion defrost control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202222947U CN201488421U (en) | 2009-09-04 | 2009-09-04 | Photoelectric conversion defrost control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201488421U true CN201488421U (en) | 2010-05-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202222947U Expired - Fee Related CN201488421U (en) | 2009-09-04 | 2009-09-04 | Photoelectric conversion defrost control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201488421U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042791A (en) * | 2015-08-20 | 2015-11-11 | 苏州创时云能源科技有限公司 | On-line monitoring and controlling system and method for defrosting of air conditioner |
| CN111365912A (en) * | 2020-03-25 | 2020-07-03 | 山东七十二度制冷设备有限公司 | Refrigeration house air cooler defrosting system and method based on photoelectric conversion control |
-
2009
- 2009-09-04 CN CN2009202222947U patent/CN201488421U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042791A (en) * | 2015-08-20 | 2015-11-11 | 苏州创时云能源科技有限公司 | On-line monitoring and controlling system and method for defrosting of air conditioner |
| CN105042791B (en) * | 2015-08-20 | 2017-11-28 | 苏州创时云能源科技有限公司 | A kind of air-conditioner defrosting on-line monitoring and control system and method |
| CN111365912A (en) * | 2020-03-25 | 2020-07-03 | 山东七十二度制冷设备有限公司 | Refrigeration house air cooler defrosting system and method based on photoelectric conversion control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20110904 |