The sensor of perception frost thickness, refrigerator and method of work with this sensor
Technical field
The present invention relates to a kind of sensor of perception frost thickness, refrigerator and method of work, belong to refrigerator manufacturing technology field with this sensor.
Background technology
Existing air cooling type refrigerator, the inner fan that adopts drives the exchange heat that air is realized evaporator and refrigerator storage space.Flow of refrigerant is taken away airborne heat in the evaporator, and lower because of the evaporator fin coil temperature simultaneously, airborne moisture condenses into frost on coil pipe and fin.Along with the increase of frosting degree, the evaporator heat exchanger effectiveness begins to descend.So air cooling type refrigerator is after operation a period of time, compressor can be out of service, is installed near the defrost heating tube of evaporator and begins heating, melts the frost that evaporator surface adheres to.After near defrost heating tube work stipulated time or the evaporator temperature sensor sense temperature is higher than setting value, show that the frost of evaporator surface melts elimination.Compressor is worked again, keeps the design temperature of storage space.
Existing refrigerator defrost mode adopts regularly defrost, and work is carried out in start operation back about 8 hours defrost heating tubes at interval, even under the little situation of environment or refrigerator inside humidity, evaporator surface does not have frosting.Under the few situation of frost, evaporator portion megadyne temperature degree uphill process can reach the temperature that defrost stops very soon, but this also can cause the storeroom temperature to rise, and influence stores quality and increases energy consumption.
Summary of the invention
Fundamental purpose of the present invention is to address the above problem and is not enough, and a kind of sensor of perception frost thickness is provided, and is not only simple in structure, and accuracy of detection is high.
Another fundamental purpose of the present invention is, a kind of refrigerator with the sensor is provided, and can accurately detect frost thickness, makes refrigerator defrost as required, saves electrical source consumption.
Another fundamental purpose of the present invention is, a kind of method of work of above-mentioned refrigerator is provided.
For realizing above-mentioned purpose, technical scheme of the present invention is:
A kind of sensor of perception frost thickness; Comprise shell, be arranged on the treatment circuit in the said shell and be arranged on the jack-plug socket on the said shell; Be relatively set with two pedestals on the said shell; Fixing respectively at least one cool guide sheet on the opposite face of two said pedestals has simulation frosting portion at least one said pedestal, said simulation frosting portion is connected with said cool guide sheet; The position of corresponding said simulation frosting portion is oppositely arranged light transmitting terminal and optical receiving end on two said pedestals, and said smooth transmitting terminal is connected with said treatment circuit with optical receiving end.
Further, said cool guide sheet is 4, and fixing two cool guide sheets leave the gap between two said cool guide sheets of homonymy on each said pedestal, and said gap is said simulation frosting portion.
Further, said cool guide sheet extends the said pedestal outside, and its part that extends out is for can be connected to the buckle structure on the evaporator coil.
Further, said shell is provided with the fixed orifice that at least one is used for fixing said sensor.
Another technical scheme of the present invention is:
A kind of refrigerator with the sensor; The sensor that is used for the perception frost thickness is installed on evaporator of refrigerator; Said sensor comprises shell, is arranged on the treatment circuit in the said shell and is arranged on the jack-plug socket on the said shell, is relatively set with two pedestals on the said shell, fixing respectively at least one cool guide sheet on the opposite face of two said pedestals; On at least one said pedestal, has simulation frosting portion; Said simulation frosting portion is connected with said cool guide sheet, and the position of corresponding said simulation frosting portion is oppositely arranged light transmitting terminal and optical receiving end on two said pedestals, and said smooth transmitting terminal is connected with said treatment circuit with optical receiving end.
Further, said sensor is installed on first row's coil pipe of the anterior air intake of said evaporator position, or is installed on last row's coil pipe.
Further, said sensor relies on said cool guide sheet to be fixed on two adjacent in said evaporator coil pipes.
Further, be connected through screw retention between the shell of said sensor and the end plate of said evaporator, or paste fixingly, or snap fit connects.
Another technical scheme of the present invention is:
A kind of method of work of refrigerator is installed a sensor on the evaporator of refrigerator, in order to the frost thickness of simulation and the said evaporator of perception, and then according to the defrost of frost thickness automatic control and adjustment refrigerator.
Further, on said sensor, have simulation frosting portion, what of the light wave through seeing through said simulation frosting portion frost layer are judged the thickness of frost layer.
Content to sum up; The sensor of a kind of perception frost thickness of the present invention and have the refrigerator and the method for work of this sensor; One-piece construction is simple, detects frost thickness through simulation frosting portion is set in sensor, has improved the accuracy of detection of this sensor.The present invention has simultaneously substituted the existing pattern of utilizing Fixed Time Interval control defrost, utilize sensor senses evaporator of refrigerator surface frosting thickness, and then the control refrigerator carries out defrost.Do not exist under frosting and the unnecessary defrost situation on the evaporator of refrigerator surface, delay the time interval of heating tube heating, realize defrost as required, both only needed defrost under the situation of defrost, save electrical source consumption at evaporator.
Description of drawings
Fig. 1 is an evaporation structure synoptic diagram of the present invention;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is a sensor construction synoptic diagram of the present invention;
Fig. 4 is the cross-sectional view of sensor of the present invention;
Fig. 5 is that the B of Fig. 3 is to view;
Fig. 6 is a sensor circuit schematic diagram of the present invention.
Extremely shown in Figure 6 like Fig. 1, evaporator 1, sensor 2, shell 3, treatment circuit 3, jack-plug socket 3, fixed orifice 6, end plate 7, coil pipe 8, pedestal 9,10, cool guide sheet 11,12,13,14, gap 15,16, fin 17, light transmitting terminal 18, optical receiving end 19.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
As depicted in figs. 1 and 2, a kind of refrigerator installs and fixes the sensor 2 that can simulate with the frost thickness of perception frosting on evaporator 1.Sensor 2 can be fixed on the coil pipe 8 of optional position of evaporator 1, and in the present embodiment, sensor 2 preferably is fixed on first row's coil pipe 8 of evaporator 1 anterior air intake position, or on last row's coil pipe.
Extremely shown in Figure 5 like Fig. 3; The above-mentioned sensor 2 that can simulate with the perception frost thickness; Comprise a shell 3, the treatment circuit 4 of sensor 2 is arranged on the inside of shell 3, and jack-plug socket 5 is set on shell 3; Be used for sensor 2 and be connected with outside other electric elements, shell 3 adopts the material of insulation and thermal insulation.
The shell 3 of sensor 2 is provided with two fixed orifices 6; When sensor 2 is fixed on first row's coil pipe 8 or 8 last times of last row's coil pipe near the end plate 7 of evaporator 1 end, the end plate 7 of the fixed orifice on the sensor 26 with evaporator 1 is fixed together with screw.Sensor 2 fixing very convenient, and do not receive the influence of the coil pipe 8 and the fin 17 of evaporator 1.Sensor 2 also can be fixed on through the mode of glue on the end plate 7 of evaporator 1, also can be fixed on through the structure of buckle on the end plate 7 of evaporator 1.
On shell 3, be relatively set with two semicircular pedestals 9,10, the shape of pedestal 9 and pedestal 10 is not restricted to semicircle, and the material of pedestal 9 and pedestal 10 is the same with shell 3, is the material of insulation and thermal insulation.Fixing respectively at least one cool guide sheet on the opposite face of two pedestals 9,10, cool guide sheet are fixedly connected on the coil pipe 8 with evaporator 1.
Cool guide sheet can be provided with one on each pedestal 9,10, also can be therein two cool guide sheets be set on pedestal 9 or 10, and a cool guide sheet is set on another pedestal, with the position of the edge junction of cool guide sheet can be as simulation frosting portion.But for the degree of accuracy that guarantees to detect, as shown in Figure 4, in the present embodiment; Four cool guide sheets 11,12,13,14 preferably are set, and cool guide sheet 11 is fixed on the pedestal 9 with cool guide sheet 12, and cool guide sheet 13 is fixed on the pedestal 10 with cool guide sheet 14; Leave gap 15 between cool guide sheet 11 and the cool guide sheet 12; Leave gap 16 between cool guide sheet 13 and the cool guide sheet 14, gap 15 and gap 16 corresponding settings, gap 15 is the simulation frosting portion that sensor 2 is used to simulate evaporator coil 8 and fin 17 frosting thickness with gap 16; In the present embodiment, simulation frosting portion is two that are oppositely arranged.
Four cool guide sheets 11,12,13,14 are the heat conductive metal sheet; Together amount of localized heat is delivered in the cold-producing medium through evaporator fin 17 and coil pipe 8 and takes away; Make the airflow that has steam through the time; Steam is met the condensation knot, on cool guide sheet 11,12,13,14, reaches 15,16 places, gap and condenses into frost, simulates the frosting thickness of evaporator coil 8 and fin 17 with this.
Corresponding position of simulating frosting portion on two pedestals 9,10, the position in promptly corresponding gap 15 is provided with light transmitting terminal 18, a relative side, the position in promptly corresponding gap 16 is provided with optical receiving end 19, and light transmitting terminal 18 is connected with treatment circuit 4 with optical receiving end 19.
As shown in Figure 6; The diode of light transmitting terminal 18 sends the light wave of some; See through the frosting layer and air transfer to the optical receiving end 19 of simulation frosting location, through different frosting thickness, the light wave quantity that arrives optical receiving end 19 is different; Thereby sensor 2 feeds back the different output voltage value, judges the thickness of frost layer as foundation with this.Only have frosting and air between light transmitting terminal 18 and the optical receiving end 19, do not have other and stop, what of light wave only receive the influence of frost thickness, and then guarantee that this sensor 2 can accurately detect frost thickness.
During the refrigerator running, the frosting thickness of simulation frosting portion is little in start vaporizer device 1 and the sensor 2, and the light wave that optical receiving end 19 receives is many, and the magnitude of voltage of sensor 2 outputs is high.Otherwise behind refrigerator running certain hour, frost thickness increases, and the light wave that optical receiving end 19 receives is few, and the magnitude of voltage of sensor 2 outputs is lower.Refrigerator control system is automatically regulated the defrost interlude according to the size of sensor 2 output voltages, and the device 1 of avoiding evaporating is frostless and the defrost heating tube carries out defrost work, also can when serious frosting, carry out the defrost action in advance.Improve the defrost control accuracy of storage space, avoid invalid defrost, save useless electrical source consumption.
In four cool guide sheets 11,12,13,14; Cool guide sheet 11 and the top of cool guide sheet 13 relative fixed on the opposite face of pedestal 9 and 10; Cool guide sheet 12 and cool guide sheet 14 relative fixed on the opposite face of pedestal 9 and 10 the bottom and extend the outside of pedestal 9 and 10; Its part that extends out is a buckle structure, can be connected on two adjacent coil pipes 8 on the evaporator 1, not only plays fixing effect; Make simultaneously between cool guide sheet 11,12,13,14 and evaporator fin 17 and the coil pipe 8 and transmit heat, simple to operation.
As stated, in conjunction with the given scheme content of accompanying drawing, can derive the similar techniques scheme.In every case be the content that does not break away from technical scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.