CN2733282Y - Frost melting determination apparatus - Google Patents
Frost melting determination apparatus Download PDFInfo
- Publication number
- CN2733282Y CN2733282Y CN 200420026951 CN200420026951U CN2733282Y CN 2733282 Y CN2733282 Y CN 2733282Y CN 200420026951 CN200420026951 CN 200420026951 CN 200420026951 U CN200420026951 U CN 200420026951U CN 2733282 Y CN2733282 Y CN 2733282Y
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- frost
- infrared
- receiver
- heat exchanger
- infrared receiver
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Abstract
The utility model provides a frost melting determination apparatus, which relates to an apparatus determining the frost melting operation according to the thickness of the ice and frost in the heat exchanger in the indirect cooling type temperature difference electronic refrigerator. The surface of the heat exchanger in the electronic refrigerator is provided with an infrared emitter and an infrared receiver; the infrared emitter and the infrared receiver are installed oppositely in linear type without blocking by any object in the middle part. The emitter and receiver pass through the power supply; a resistance and a master control board form a loop. When the infrared emitted by the infrared emitter is blocked by the ice and frost on the surface of the heat exchanger, the amount of the infrared received by the infrared receiver is decreased, and the master control board instructs the frost melting apparatus to operate. The ice and frost is melted gradually, and the amount of the infrared received by the receiver is increased; when achieving the requirement, the master control board instructs the frost melting apparatus to stop operating. The amount of the infrared received by the receiver directly reflects the thickness of the ice and frost. The action of the frost melting apparatus is controlled by the amount of the received infrared, which effectively controls the thickness of the ice and frost, avoids the ineffective frost melting, saves the electric energy, and improves the effective availability of the energy.
Description
Technical field the utility model relates to frost thickness identification device, specially refers to the device of differentiating the defrost operation in the indirect-cooling thermoelectric refrigerator with the frost thickness of heat exchanger.
Background technology is before the utility model proposes, along with the improvement of semi-conducting material and technology and the improvement of heat dissipation, the range of application of thermoelectric refrigerator from traditional refrigerated storage temperature range expansion to the cryogenic temperature scope, the cold junction operating temperature of heat exchanger also under common vanishing above freezing, causes heat exchanger to have the defrost problem in the thermoelectric refrigerator.Aspect the method for judging the beginning defrost, method commonly used is timing or decides according to temperature difference in heat exchanger and the refrigerator.The timing defrost is a set-up time control loop on the circuit of control defrosting device action, and defrosting device just begins action at regular intervals, promptly begins defrost.But it can not adapt to the operating mode of continuous variation, when the frequent start-stop of electric refrigerator, when the very thick utmost point of the frost on the heat exchanger needs defrost, because official hour to the timing circuit not, defrosting device can't carry out defrost with regard to akinesia, the efficient of heat exchanger will descend, and power consumption will rise.At electric refrigerator seldom during start-stop, the frost on the heat exchanger is very thin when need not defrost, but because arrived official hour on the timing circuit, and beginning defrost operation, this part this savable electric energy but has been consumed.Controlling the defrost operation according to temperature difference is that thermometric circuit and alternative route are installed in master control circuit, measures temperature in heat exchanger and the refrigerator respectively, and the temperature difference that whether reaches regulation according to both temperature difference needing to determine whether defrost.When this method can't adapt to the process variations of electric refrigerator equally to the requirement of defrost.The electricity refrigerator when just having begun to start the temperature difference very big but do not need defrost, but discriminating gear sends the defrost instruction.The electricity refrigerator just needs defrost after stable operation a period of time, but this moment, the temperature difference was very little, and discriminating gear can not send the defrost instruction.Therefore above-mentioned defrost discriminating gear can not guarantee that all the frost on the heat exchanger has only uniform thin layer, and then can not guarantee that heat exchanger is in good working order all the time.
Utility model content the purpose of this utility model is to provide a kind of new defrost discriminating gear, makes the frost of heat exchanger on the electric refrigerator keep uniform thin layer, and the defrost operation is undertaken by frost thickness, saves the power consumption of electric refrigerator.
The utility model is achieved through the following technical solutions.A kind of defrost discriminating gear, by the indirect-cooling thermoelectric refrigerator, heat exchanger, power supply, two groups of resistance are formed, and it is characterized in that: also have master control borad, RF transmitter and infrared receiver; RF transmitter forms the RF transmitter circuit by one group of resistance and power supply; Infrared receiver also forms the infrared receiver circuit with power supply by another group electricity, master control borad by power supply respectively with the RF transmitter circuit, the infrared receiver circuit forms controlled loop.
Described RF transmitter and described infrared receiver all are arranged on the surface of heat exchanger (2).
Described infrared receiver (4) is arranged on the dead ahead of described RF transmitter (3), and is middle without any object resistance shelves.
When electric refrigerator starts, master control borad sends instruction, make RF transmitter action emission infrared ray by applying voltage, the number of infrared receiver receiving infrared-ray (being the size of extra current) feeds back to master control borad, and is handled defrosting device starting and stopped by it.The frost of heat-exchanger surface is very thin when electric refrigerator has just started, the information that the whole receiving infrared-ray transmitters of infrared receiver are sent, and the extra current maximum, master control borad can not send the defrost instruction.The electricity refrigerator constantly moves, and the frost of heat-exchanger surface is thickeied gradually, because the information that RF transmitter sends is subjected to stopping of frost, the infrared ray information that infrared receiver is received will reduce, and extra current also can reduce thereupon.When the infrared ray information of receiving reduced to a certain degree (extra current minimum), master control borad will send the instruction of defrosting device starting, and defrost begins.After frost is melted, the frost of heat-exchanger surface is attenuate gradually, the passage of infrared ray information transmission is unimpeded again, the infrared ray information that infrared receiver is received increases gradually, extra current increases gradually, when the information that the infrared ray transmitter sends was almost all received (extra current maximum), master control borad will send the instruction that stops defrost, and defrosting device quits work.The number of the infrared ray information that infrared receiver is received (size of extra current) has reflected the thickness of the frost of heat-exchanger surface.Frost is thick more, and the infrared ray information that receiver is received is few more, and extra current is more little, and vice versa.
After the utility model adopted technique scheme, the defrost operation was carried out according to the thickness of the frost of heat-exchanger surface.Can control the thickness of frost effectively, guarantee the heat exchanger good work efficiency.Can adapt to Protean applying working condition, avoid invalid defrost, saves energy, the effective rate of utilization of raising energy.
Appended drawings 1 is a structural representation of the present utility model.
Accompanying drawing 2 is for relating to the conspectus of master control borad in the utility model
The utility model is described in further detail below in conjunction with drawings and Examples for the specific embodiment.Near surface at the heat exchanger (2) of indirect-cooling thermoelectric refrigerator (1) is provided with RF transmitter (3), and infrared receiver (4) is set in its place ahead.RF transmitter (3) and infrared receiver (4) arrange that linearly the centre stops without any other objects.RF transmitter (3) forms the RF transmitter circuit by resistance (6) and power supply (8).Infrared receiver (4) by resistance (7) also and power supply (8) form the infrared receiver circuit, infrared receiver (4) also is connected with master control borad (5).Master control borad (5) sends instruction and sends DC voltage by power supply (8), makes RF transmitter circuit and infrared receiver circuit all become closed circuit.DC voltage makes RF transmitter (3) action, sends infrared ray.DC voltage produces electric current in the infrared receiver circuit, current direction master control borad (5) becomes the fundamental current in the infrared receiver circuit.When infrared ray transmitter (3) action, when sending infrared ray, infrared receiver (4) receiving infrared-ray signal also is converted into electric current with signal, and this electric current becomes the extra current in the infrared receiver circuit.The infrared ray number signal that receives is many more, and extra current is also big more.Master control borad (5) is then according to the size of current of coming from the infrared receiver circuit, and promptly whether the size of extra current (also be infrared ray number signal what) decides defrosting device to need to start.At electric refrigerator (1) when beginning to start, the surface of heat exchanger (2) does not almost have any frost, infrared receiver (4) receives the most infrared signal from RF transmitter (3), extra current reaches maximum, and master control borad (5) can not send the instruction that defrosting device starts.Along with the operation of electric refrigerator (1), the frost progressive additive on heat exchanger (2) surface.Frost has been blocked ultrared passing road, and the infrared ray quantity that infrared receiver (4) receives reduces gradually, and extra current also can reduce gradually in the infrared receiver.When have only about half infrared ray receive by infrared receiver (4) that promptly extra current has only a peaked half, master control borad (5) will send the instruction of defrosting device starting, the beginning defrost.Frost is changed gradually, and the frost layer is attenuate gradually, and ultrared passing road is unimpeded gradually, and the infrared ray quantity that infrared receiver (4) receives increases gradually, and extra current is along with increase.When almost all infrared rays all received by infrared receiver (4), being equivalent to the surperficial frost thickness of heat exchanger (2) has only about in the of 1 millimeter, when extra current reached maximum, master control borad (5) will send defrosting device instruction out of service, defrost stops.Under the effect of RF transmitter (3) and infrared receiver (4), the starting of defrost operation and stop to control by frost thickness.The number that frost thickness is equivalent to infrared receiver (4) receiving infrared-ray signal is the size of extra current just.The surperficial frost thickness of heat exchanger (2) has been subjected to effective control like this, has kept the efficient of heat exchanger (2).Heat exchanger (2) can adapt to Protean service condition, avoids invalid defrost, saves energy.
Claims (3)
1. defrost discriminating gear, by indirect-cooling thermoelectric refrigerator (1), heat exchanger (2), power supply (8), resistance (6), resistance (7) is formed, and it is characterized in that: also have master control borad (5), RF transmitter (3) and infrared receiver (4); RF transmitter (3) forms the RF transmitter circuit by resistance (6) and power supply (8); Infrared receiver (4) by resistance (7) also and power supply (8) form the infrared receiver circuit, master control borad (5) by power supply (8) respectively with the RF transmitter circuit, the infrared receiver circuit forms controlled loop.
2. the described a kind of defrost discriminating gear of claim 1, it is characterized in that: RF transmitter (3) and infrared receiver (4) all are arranged on the surface of heat exchanger (2).
3. the described a kind of defrost discriminating gear of claim 1, it is characterized in that: infrared receiver (4) is arranged on the dead ahead of RF transmitter (3), and is middle without any object resistance shelves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026951 CN2733282Y (en) | 2004-05-08 | 2004-05-08 | Frost melting determination apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026951 CN2733282Y (en) | 2004-05-08 | 2004-05-08 | Frost melting determination apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2733282Y true CN2733282Y (en) | 2005-10-12 |
Family
ID=35069122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420026951 Expired - Fee Related CN2733282Y (en) | 2004-05-08 | 2004-05-08 | Frost melting determination apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2733282Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435145A (en) * | 2011-10-27 | 2012-05-02 | 海尔集团公司 | Sensor capable of sensing frost thickness, refrigerator having sensor and working method thereof |
| CN105972892A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction microwave defrosting device for air cooler |
| CN105972890A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Auto-induction microwave defrosting air cooler |
| CN107024056A (en) * | 2016-02-02 | 2017-08-08 | Lg电子株式会社 | The sensing and removing device and its control method of refrigerator dew |
| 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 |
-
2004
- 2004-05-08 CN CN 200420026951 patent/CN2733282Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435145A (en) * | 2011-10-27 | 2012-05-02 | 海尔集团公司 | Sensor capable of sensing frost thickness, refrigerator having sensor and working method thereof |
| CN107024056A (en) * | 2016-02-02 | 2017-08-08 | Lg电子株式会社 | The sensing and removing device and its control method of refrigerator dew |
| US10458694B2 (en) | 2016-02-02 | 2019-10-29 | Lg Electronics Inc. | Apparatus for sensing and removing dew on refrigerator and controlling method thereof |
| CN107024056B (en) * | 2016-02-02 | 2019-11-08 | Lg电子株式会社 | The sensing and removing device and its control method of refrigerator dew |
| US11549741B2 (en) | 2016-02-02 | 2023-01-10 | Lg Electronics Inc. | Apparatus for sensing and removing dew on refrigerator and controlling method thereof |
| CN105972892A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Automatic induction microwave defrosting device for air cooler |
| CN105972890A (en) * | 2016-06-23 | 2016-09-28 | 刘滕军 | Auto-induction microwave defrosting air cooler |
| 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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |