CN105849485B - Refrigerator - Google Patents

Abstract

The present invention provide it is a kind of have except defrosting system refrigerator, even if should except defrosting system attachment on an evaporator frost it is more, there will not be the ease of use damaged in user, can while suppression defroster abnormal heating, while effectively defrosted.The refrigerator (1) has basic defrosting operating function, this defrosts operating function when the driving duration for judging defroster (13) reaching the predetermined very first time (TM1) substantially, and when judging temperature predetermined first temperature (TX) of arrival of evaporator (11), stop the driving of defroster (13), and the refrigerator (1) has additional defrosting operating function, the addition defrosts operating function according to the temperature information of the evaporator (11) detected when reaching the very first time (TM1), judge whether that needs carry out adding defrosting operation, after a stop drive defroster (13) again after predetermined second time (TM2).

Description

Refrigerator

Technical field

The present invention relates to the refrigerator with the defroster to be defrosted to evaporator.

Background technology

In the past, refrigerator was provided with multiple storerooms, including：With the refrigerating chamber of cryopreservation food and beverage etc., for cold Freeze and preserve food or store the refrigerating chamber of frozen food etc. and the life such as meat or seafood is stored with the temperature lower than refrigerated storage temperature Shock chamber of fresh food etc..

In addition, with the evaporator (cooler) for cold air as defined in generating, by the cold air of above-mentioned generation to refrigerating chamber, The fan and cold air path that shock chamber and refrigerating chamber are sent out.The cold air supplied by cold air path is from being arranged on cold air path Multiple flow export branches, flowed out to each storeroom.

The cold air flowed out to each storeroom is from each storeroom via backward channel Returning evaporimeter.That is, generated by evaporator Cold air circulated in refrigerator, it is possible thereby to realize effective utilization of the cold air of generation, reduce the cost of cooling.

In addition, closing cold air path as bloom is attached on evaporator surface, then it can not make defined cold air flow, institute Widely to use a kind of refrigerator with Defrost heater, the Defrost heater is used to make to be attached to the frost on evaporator surface Melt.For example, usually using the refrigerator with defroster, the defroster has Defrost heater, detection evaporator surface Frosting sensor and detect evaporator temperature temperature sensor.

In addition, in order to prevent Defrost heater abnormal heating, it is proposed that a kind of refrigerator with Thermal Cutoffs, for example, Propose a kind of refrigerator with following Thermal Cutoffs：According to the detection temperature for the temperature sensor being arranged near evaporator Degree, control the energization to Defrost heater, and fused more than set point of temperature and cut off to Defrost heater energization (such as With reference to patent document 1).

In addition, if the conduction time of Defrost heater is elongated, produces indoor temperature and rise and reserve is brought not Good influence or Thermal Cutoffs fuse and prevent the problem of refrigerator is from operating, so in order to prevent above-mentioned bad phenomenon, it is proposed that A kind of refrigerator with timer, the timer limit the conduction time to Defrost heater (referring for example to patent document 2).

Prior art literature

Patent document

Patent document 1：Japanese Laid-Open Patent Publication 2003-35483

Patent document 2：Clear No. 63-201475 of Japanese Laid-Open Patent Publication

Near with Defrost heater, the sensor for the frosting for detecting evaporator surface, detection evaporator The defroster of the temperature sensor of temperature etc., defrosting operation can be carried out, make to be attached to the frost thawing on evaporator surface.This Outside, the Thermal Cutoffs of the energization to Defrost heater is cut off by using being fused with set point of temperature, can prevented because excessively Drive Defrost heater and caused abnormal heating.

But if Thermal Cutoffs fuses, impair the function of refrigerator or make its stopping.In addition, by using special Timer described in sharp document 2 limits the conduction time to Defrost heater, although can prevent Thermal Cutoffs from fusing, But even if defroster normal work, frost can not be removed within the defined time sometimes.

For example, during equivalent to the food that high humidity is put into interior and under high humidity environment using refrigerator and for a long time or Frequent switch on situation of door etc..In this case, white amount on an evaporator is condensed than generally more, and generation is common to remove The situation that frost operating can not remove frost.

Therefore, it is desirable to which a kind of remove defrosting system, even if the white amount of condensation on an evaporator is more, it there will not be and damage in use The ease of use of person, reliably the frost of condensation can be defrosted, and be capable of side suppress defroster abnormal heating, Defrosting effect as defined in the performance of side.

The content of the invention

In view of the above problems, it is an object of the invention to provide a kind of refrigerator having except defrosting system, should be except defrosting system Make the frost of attachment on an evaporator more, there will not be the ease of use damaged in user, be capable of the different of side suppression defroster Often heating, side are effectively defrosted.

In order to reach above-mentioned purpose, the present invention provides a kind of refrigerator, and it includes：Evaporator, generate cold air；Cold air path, Circulate cold air；Defroster, evaporator is defrosted；Storeroom, the cold air cooling circulated by cold air path；And temperature Detector is spent, detects the temperature of evaporator, the refrigerator has control unit, and the control unit has to be carried out using temperature detector Temperature detecting function and clocking capability, and the driving to defroster is controlled, and the refrigerator is characterised by, control Portion has basic defrosting operating function, and the basic defrosting operating function reaches pre- in the driving duration for judging defroster During the very first time first determined and when judging temperature predetermined first temperature of arrival of evaporator, make defroster Driving stops, and the control unit, with additional defrosting operating function, the additional defrosting operating function is according to arrival first Whether the temperature information of the evaporator detected during the time is less than than the first temperature low temperature and predetermined second temperature, sentences It is disconnected whether to need to carry out adding defrosting operation, judge that needs carry out adding defrosting operation when the temperature is lower than second temperature, After the stopping after predetermined second time, driven again the defroster extension defrost operation.

In addition, the present invention also provides a kind of refrigerator, it includes：Evaporator, generate cold air；Cold air path, circulate cold air；Remove White device, the evaporator is defrosted；Storeroom, the cold air cooling circulated by the cold air path；Temperature detection Device, the temperature of the evaporator is detected, the refrigerator has control unit, and the control unit has what is carried out using temperature detector Temperature detecting function and clocking capability, and the driving to the defroster is controlled, and the refrigerator is characterised by, institute Stating control unit has basic defrosting operating function, and the basic defrosting operating function continues in the driving for judging the defroster When time reaches the predetermined very first time and judge that the temperature of the evaporator reaches predetermined first temperature When, stop the driving of the defroster, and the control unit has additional defrosting operating function, the additional defrosting behaviour Make the steaming after the stipulated time of function by the temperature of the evaporator detected when reaching the very first time and hereafter The temperature of hair device is compared, and judges whether that needs carry out adding defrosting operation according to whether temperature declines, and is confirming to be somebody's turn to do Temperature judges that needs add defrosting and operated when declining, after the stopping after predetermined second time, enter Row drives the extension of the defroster to defrost and operated again.

According to above-mentioned composition, after the basic defrosting operation of defroster terminates, judged according to the temperature information of evaporator When needing add defrosting operation, defroster is being driven again after the stipulated time, so being capable of side suppression defrosting dress The abnormal heating put, side effectively make the frost thawing do not melted completely.In addition, the temperature information based on evaporator judges not needing When add defrosting operation, operated without additional defrosting, so can prevent caused by the excessive driving of defroster Bad phenomenon.I.e., it is proposed, according to the invention, a kind of refrigerator for having and removing defrosting system as follows can be obtained：Even if attachment is on an evaporator Frost it is more, there will not be the ease of use damaged in user, can while suppression defroster abnormal heating, while effectively enter Row defrosting.

In addition, the present invention, in the refrigerator of said structure, the additional defrosting operating function can be by the stipulated time Driven again afterwards defroster extension defrost operation, can also extend defrosting operation after after the stipulated time, Further drive again the defrosting operation of extension again of defroster.Furthermore, it is possible to carry out implement defrosting operation next time Basic defrosting operation setting change, them can also be combined as.

According to the present invention, under the situation that frosting is not melted and remained completely when basic defrosting operation is carried out, pass through Judge whether to need to carry out adding defrosting operation according to the temperature information of evaporator and drive the additional of defroster to defrost again Operating function, when judging that needs add defrosting operation, after defroster temporarily ceases after the stipulated time, carry out Driving, which performs, again extends defrosting operation, so can obtain with the following refrigerator for removing defrosting system：User is not detracted from Ease of use, can while suppress defroster abnormal heating, while effectively defrosted.

Brief description of the drawings

Fig. 1 is the brief side cross-sectional view of one for representing the refrigerator of the present invention.

Fig. 2 is the block diagram for representing the basic composition possessed by the refrigerator of the present invention except defrosting system.

Fig. 3 is the timing diagram for representing the summary except defrosting system.

Fig. 4 is the flow chart for the embodiment 1 for representing defrosting operational sequence.

Fig. 5 is the timing diagram of the defrosting operational sequence of embodiment 1.

Fig. 6 is the flow chart for the embodiment 2 for representing defrosting operational sequence.

Fig. 7 is the timing diagram of the defrosting operational sequence of embodiment 2.

Fig. 8 is the flow chart for the embodiment 3 for representing defrosting operational sequence.

Fig. 9 is the timing diagram of the defrosting operational sequence of embodiment 3.

Figure 10 is the flow chart for the embodiment 4 for representing defrosting operational sequence.

Figure 11 is the timing diagram of the defrosting operational sequence of embodiment 4.

Figure 12 is the flow chart for the embodiment 5 for representing defrosting operational sequence.

Figure 13 is to represent the block diagram being monolithically fabricated except defrosting system.

Embodiment

Below, embodiments of the present invention are illustrated referring to the drawings.In addition, same component parts is attached using identical Icon is remembered and suitably eliminates detailed description.First, one of the refrigerator of present embodiment is illustrated using Fig. 1.

As shown in figure 1, the refrigerator 1 of present embodiment is provided with refrigerating chamber on the top for the heat insulating box 2 for forming main part 4, refrigerating chamber 3 and vegetable compartment 5 etc. are provided with thereunder.Stored refrigerated reserve in refrigerating chamber 3, freezen protective in refrigerating chamber 4 Reserve.One end switchs refrigerating chamber 3 and refrigerating chamber 4 by door 3a, 4a of the rotary type of pivotal support respectively.

The first cold air path 7 is configured with the back side of refrigerating chamber 4, evaporator is provided with above-mentioned first cold air path 7 (cooler) 11 and fan 12.In addition, being provided with defroster 13 in the lower section of evaporator 11, the defroster 13 has to steaming The Defrost heater that hair device 11 is defrosted.In addition, the stream that cold air is flowed into from the first cold air path 7 is provided with refrigerating chamber 4 The outlet 7a and return port 7b for making cold air the first cold air path 7 of return.

Be configured with the second cold air path 8 in the upper rear portion of refrigerating chamber 3, second cold air path 8 by be arranged on every Baffle plate (not shown) on hot wall 9 connects with the first cold air path 7.Offered on the second cold air path 8 towards refrigerating chamber 3 Flow export (not shown), in addition, being provided with the return port (not shown) for making cold air return to the first cold air path 7 on refrigerating chamber 3. Therefore, by the cold air that evaporator 11 generates by fan 12, as shown in the arrow E1 in figure, from being arranged on the top of refrigerating chamber 4 Flow export 7a is flowed into, and is flowed out from the return port 7b for being arranged on bottom.In addition, cold air is by being arranged on the second cold air path 8 On flow export flow into refrigerating chamber 3 in, refrigerating chamber 3 internal circulation cold air from return port return the first cold air path 7.

The bottom rear of heat insulating box 2 is provided with Machine Room 6, being provided with Machine Room 6 transports cooling cycle system The compressor 10 turned.Compressor 10 is connected with condenser, capillary and evaporator 11 successively by refrigerant pipe.Utilize compressor 10 driving, refrigerant circulate in refrigerant pipe, operate cooling cycle system.

If driving fan 12, air circulates in the first cold air path 7, and with configuring in cooling cycle system Evaporator 11 in low temperature portion carries out heat exchange.Thus, generate cold air and flowed into from flow export 7a in refrigerating chamber 4 and to refrigerating chamber Cooled down in 4.The cold air of circulation passes through return port 7b Returning evaporimeters 11 in refrigerating chamber 4.If in addition, open baffle plate, Then cold air is passed to the second cold air path 8, flowed out from flow export to refrigerating chamber 3 and the grade of vegetable compartment 5, and by setting in addition Return port Returning evaporimeter 11.

The top of refrigerating chamber 3 is provided with crisper 20, and the electric of storage electrical equipment is configured with the side of crisper 20 Box 21.Circuit substrate is installed in electrical box 21, the circuit substrate is used to drive compressor 10, evaporator 11 and fan 12 etc. Each device.The control unit 24 of the driving of the defroster 13 of present embodiment is controlled to be also contained on foregoing circuit substrate.In addition, The switch 22 for the temperature being provided with refrigerating chamber 3 and refrigerating chamber 4 in setting refrigerating chamber 3 and the temperature in setting refrigerating chamber 4 Switch 23 etc..

As described above, flowing out to the cold air of each storerooms such as refrigerating chamber 3, refrigerating chamber 4 and vegetable compartment 5, passed through from each storeroom By backward channel Returning evaporimeter 11.That is, the cold air of generation circulates in refrigerator in evaporator 11, and thereby, it is possible to realize life Into cold air effective utilization.

Because the cold air for circulating and returning in refrigerator includes the moisture from releases such as food, if so utilizing evaporator 11 pairs of above-mentioned cold air are cooled down, then frost is attached on the surface of evaporator 11.It is attached to such as bloom on the surface of evaporator 11 And block cold air path, then it can not make defined cold air flow, so defroster 13 is set, for making to be attached to evaporator table Frost thawing on face.Defroster 13 includes：Defrost heater (Glass tube heater), defrosts to evaporator 11；And Discharge tray, receive because discharging water caused by defrosting.In addition, refrigerator 1 includes：Thermal Cutoffs 14, between leading to Defrost heater Power line on；And temperature detector 15, for detecting the temperature of evaporator 11.

Temperature detector 15 is used for the frosting state for detecting the surface of evaporator 11, not only includes the feelings contacted with evaporator 11 Condition, in addition to configuration is in the situation of the near surface of evaporator.Also, the temperature of evaporator 11 represents to be used to detect evaporator table The temperature of the frosting state in face.In addition, by the way that temperature detector 15 is configured on the position of Defrost heater is left, can be right The frosting state for the part for also easily remaining frost even if driving Defrost heater is reliably detected.Therefore, in most cases Temperature detector 15 is more farther away from Defrost heater than Thermal Cutoffs 14, so Thermal Cutoffs 14 more holds than temperature detector 15 Easily it is heated.

Conventional defroster is when starting driving defroster and driving the duration to reach predetermined first Between when and evaporator 11 temperature reach predetermined first temperature when, stop driving defroster.

But the white amount condensed on evaporator 11 than generally it is more when, it is possible to common defrosting operating can not be frost Except complete, so in the present embodiment, the temperature of driving duration and evaporator 11 after being started according to defrosting operating And on the basis of stopping the basic defrosting operating function of driving, there is additional defrosting operating function, according to basic defrosting operation knot The temperature information of evaporator 11 after beam, judge whether that needs carry out adding defrosting operation, judgement drives defrosting again when needing Device 13.

That is, as shown in Fig. 2 present embodiment except defrosting system start defrosting operation after, pass through the operation that defrosts substantially first Function FK1 carries out basic defrosting operational sequence OP1.Also, according to the evaporator 11 detected after basic defrosting operation terminates Temperature information, by the additional operating function FK2 that defrosts, carry out adding whether defrosting operation judges, judge to utilize basic defrosting When operational sequence OP1 has obtained good defrosting effect, judgement need not carry out adding defrosting operation, and stop defrosting operation. But when judging not obtaining good defrosting effect using basic defrosting operational sequence OP1, judge that needs carry out adding defrosting Operation, and perform additional defrosting operational sequence OP2.

Whether additional defrosting operation judges the evaporator after being terminated by control unit 24 according to basic defrosting operational sequence OP1 11 temperature information is carried out.That is, the function of the temperature for the evaporator 11 that control unit 24 detects with storage temperature detector 15 And clocking capability, the driving to defroster 13 are controlled, and examined according at the end of including basic defrosting operational sequence OP1 The temperature of evaporator 11 and the temperature information of temperature change measured, judge whether that needs carry out adding defrosting operation, work as judgement When needing add defrosting operation, additional defrosting operational sequence OP2 is performed.

Herein signified temperature information be represent the evaporator 11 at the end of basic defrosting operational sequence OP1 temperature whether The temperature information lower than design temperature set in advance, is additionally whether the temperature for representing evaporator 11 operates from basic defrosting The temperature information of Wen Duxiajiang at the end of process OP1.Therefore, additional defrosting operating function FK2 at least has the first operating work It can be detected with one in the second operating function, first operating function according to when reaching the very first time after defrosting operating starts The temperature of the evaporator 11 gone out, defroster 13 is driven again, second operating function is according to the temperature after the arrival very first time Decline, drive defroster 13 again.

That is, the refrigerator 1 of present embodiment includes：Evaporator 11, generate cold air；Cold air path, circulate cold air；Defroster 13, evaporator 11 is defrosted；Storeroom, the cold air cooling circulated by cold air path；And temperature detector 15, inspection The temperature of evaporator 11 is surveyed, the refrigerator 1 has control unit 24, and the control unit 24 has the temperature carried out using temperature detector 15 Detection function (function for the temperature that storage temperature detector 15 detects) and clocking capability, and to the driving of defroster 13 It is controlled, control unit 24 has basic defrosting operating function FK1 and additional defrosting operating function FK2, the operation that defrosts substantially Function FK1 is when reaching the predetermined very first time driving duration for judging defroster 13 and is judging to evaporate When the temperature of device 11 reaches predetermined first temperature, stop driving defroster 13, addition defrosting operating function FK2 roots According to the temperature information of the evaporator 11 detected when reaching the very first time, judge whether that needs carry out adding defrosting operation, and And after the stopping after predetermined second time, defroster 13 is driven again.

According to said structure, after the basic defrosting operation of defroster 13 terminates, according to the temperature information of evaporator 11 When judging that needs add defrosting operation, defroster 13 is being driven again after the stipulated time, so being capable of side suppression The abnormal heating of defroster 13, side effectively make the frost thawing do not melted completely.In addition, the temperature information according to evaporator 11 When judgement need not carry out adding defrosting operation, operated without additional defrosting, so inhibiting the excessive drive of defroster 13 It is dynamic, it can prevent Thermal Cutoffs 14 from fusing and because the temperature of the refrigerant by evaporator 11 rises to make kind of refrigeration cycle The bad phenomenons such as the running efficiency decline of system.I.e., in the embodiment, can obtain with the following refrigerator for removing defrosting system 1：Even if the frost being attached on evaporator 11 is more, the ease of use damaged in user is there will not be, being capable of side suppression defrosting dress Put 13 abnormal heating, side is effectively defrosted.

For example, temperature information is, whether the temperature for reaching the evaporator 11 detected during the very first time is less than than the first temperature The information of degree low temperature and predetermined second temperature is lower than second temperature by the additional operating function FK2 that defrosts, the temperature When judge that needs add defrosting operation, drive again the extension defrosting operation of defroster 13.In addition, temperature information Can also be the temperature to the evaporator 11 at the end of basic defrosting operation and the evaporator 11 after the stipulated time hereafter Temperature be compared, the information whether temperature declines, judge when confirming and drop at this temperature by additional defrosting operating function FK2 Need to carry out adding defrosting operation, drive again the extension defrosting operation of defroster 13.

In addition, additional defrosting operating function FK2 judges that the temperature of the evaporator 11 in driving again arrives by control unit 24 Up to during the first temperature or when confirming the driving time again of defroster 13 by the set in advance shorter than the very first time the 3rd Between when, stopping drive again.And it is possible to defrosting operating function is extended again, stop again after the 3rd time During driving, can again driving stop after after predetermined 4th time, further drive defroster again 13。

Then, the illustrating except the basic composition of defrosting system to the refrigerator of the present invention using Fig. 3.Fig. 3 represents the present invention Refrigerator except the basic timing diagram of defrosting system, be can prevent Thermal Cutoffs 14 from fusing remove defrosting system.

Thick line L1 shown in Fig. 3 represents the conducting of defroster 13, the driving condition disconnected, and curve ST represents to be examined by temperature The temperature for the evaporator 11 that device 15 detects is surveyed, curve FT represents the temperature of Thermal Cutoffs 14.In addition, the TX shown in the longitudinal axis is Defrost end temp and be the first temperature set in advance.The FTC of topmost is blown fuse temperature.

During the basic defrosting operation of H1 expression defrosters 13 shown in the X direction of the bottom of figure (very first time, Such as 70 minutes), during the basic defrosting operation stopping of SP1 expressions, the stopping untill extension defrosting operation starts (when second Between, such as 5 minutes), H2 represents to extend during defrosting operates (the 3rd time, such as 6 minutes).In addition, TM1~TM5 represents each Moment, for example, moment TM1 be defroster 13 basic defrosting operation during terminate after the very first time H1 at the time of, TM2 is from the time of moment TM1 is after the second time SP1, at the time of TM3 is after the 3rd time H2.

As shown in curve FT, the temperature of Thermal Cutoffs 14 gradually heats up during H1 during basic defrosting operation.Such as Fruit TM1 defrosters 13 at the time of after very first time H1 stop, then the temperature of Thermal Cutoffs 14 is gradually reduced.And And at the time of after the second time SP1 after TM2 drives defroster 13 again, until the time H2 of process the 3rd of stopping Gradually heated up untill TM3 at the time of afterwards.Therefore, because defroster 13 stops during TM1~TM2, so as to turn into temporary in TM2 When the temperature that declines, so even if driving defroster 13 again, be also not easily accessible to blown fuse temperature FTC.

In addition, the temperature of evaporator 11 equally gradually heats up in the driving period of defroster 13, but according to the frost of attachment Amount, above-mentioned heating degree is different.In addition, defroster 13 stop after temperature change also according to residual white amount without Together.

For example, the situation shown in CA1 in figure represents TM1 at the time of basic defrosting operation terminates, the temperature of evaporator 11 Degree Te1 does not reach the situation of defrosting end temp (the first temperature TX).Above-mentioned example is for example equivalent to being attached on evaporator 11 White amount more than situation.

In this case, control unit 24 is according to the temperature information of the evaporator 11 after the H1 during basic defrosting operation And judge whether that needs carry out extending defrosting operation by additional defrosting operating function FK2.Also, judge that needs carry out extension and removed During frost operation, TM2 drives defroster 13 to start extension defrosting operation again at the time of after the stipulated time.Extension removes Frost, which operates TM3 at the time of H2 terminates during defrosting operation is extended, to be terminated.Certainly, the H2 during above-mentioned extension defrosting operation In, when the temperature of evaporator 11 reaches the first temperature TX (defrosting end temp) stop also extension defrosting operation.

Furthermore, it is possible to carried out extending defrosting behaviour again according to the temperature information for extending the evaporator 11 after defrosting operation terminates Make.For example, as shown in broken lines, at the time of can passing through stipulated time (the 4th time SP2) from moment TM3 TM4 to Extended defrosting operation again as H3 (the 5th time) during extending defrosting operation again during moment TM5.

Then, it is pair corresponding with each operation content implemented by additional defrosting operating function FK2 successively using Fig. 4~Figure 13 1~embodiment of embodiment 5 illustrate.

The ＞ of ＜ embodiments 1

First, using the flow chart and Fig. 5 shown in Fig. 4 shown in timing diagram, embodiment 1 is illustrated.Embodiment 1 relates to And first operating function, according to the evaporator 11 that (moment TM1) is detected when reaching the very first time after defrosting operating starts Temperature information lower than second temperature TA temperature Te1, judge that needs carry out adding defrosting operation, drive defroster 13 again. In addition, 0 shown in Fig. 5 longitudinal axis represents the position of 0 DEG C of temperature, the first temperature TX is set in more than 0 DEG C.

If defrosting operation starts, step S1 basic defrosting operation starts (moment TM0).Then, in step s 2 Judge to drive the duration whether to reach the very first time (moment TM1), when determining up to the very first time, advance to Y-direction, substantially Defrosting operation stops (step S4).In addition, in step s 2, when judging that the driving duration does not reach the very first time, to N directions Advance, judge whether the temperature Te of evaporator 11 reaches the first temperature TX (step S3), when determining up to the first temperature TX, to Y Direction is advanced, and basic defrosting operation stops (step S4) and return to step S8 usual control (CA11 equivalent to Fig. 5).Do not arrive During up to the first temperature TX, to the advance of N directions and return to step S2.

After basic defrosting operation stops (step S4), judge the temperature Te1 of evaporator 11 during moment TM1 whether than the second temperature It is low (step S5) to spend TA, during "Yes", advances to Y-direction, TM2 at the time of after the stipulated time (after the second time), Extend defrosting operation to start (step S6) (CA13 equivalent to Fig. 5).If in addition, it is "No" in step s 5, to N directions Advance, do not implement extension defrosting and operate and return to step S8 usual control (CA12 equivalent to Fig. 5).

Perform step S6 extension defrosting operation start after, in step S6A, judge the temperature Te of evaporator whether the More than one temperature TX, if "Yes", then advance to Y-direction, extension defrosting operation is stopped (step S7) and return to generally control Make (step S8).

If being "No" in step S6A, advance to N directions, judge to drive the duration whether to reach by the 3rd TM3 (step S6B) at the time of after time.If being "No" in step S6B, to the N directions advance of figure and return to step S6A, if "Yes", then advance to Y-direction and extension defrosting operation is stopped (step S7).

That is, the temperature Te (Te1) of TM1 evaporator 11 is than the at the time of the present embodiment terminates during basic defrosting operation When two temperature TA are low, judge that needs carry out adding defrosting operation.In addition, the step S1~step S4 of the present embodiment is equivalent to basic Defrost operating function FK1, and step S5~step S7 is equivalent to additional defrosting operating function FK2.

For example, as the CA11 shown in Fig. 5, when reaching the first temperature TX in defrosting operational sequence substantially, at this Point, basic defrosting operation stop, and without extending defrosting operation, return to generally control.In addition, as CA12, removing substantially When the temperature Te1 of TM1 evaporator 11 is higher than second temperature TA at the time of at the end of frost operation, without extending defrosting operation, Return to generally control.

But in the case of CA13, TM1 at the time of basic defrosting operation terminates, the temperature Te1 of evaporator 11 are not arrived Up to defrosting end temp (the first temperature TX), design temperature (second temperature TA) lower than it is not reached yet.Above-mentioned example is suitable In the situation more than the white amount being for example attached on evaporator 11.

In this case, control unit 24 is according to the temperature Te1 of the evaporator 11 after the H1 during basic defrosting operation It is lower than second temperature TA, judge that needs carry out extending defrosting operation by additional defrosting operating function FK2.Also, by advising TM2 at the time of after fixing time (after the second time SP1), drive defroster 13 (being shown equivalent to the ON in figure) simultaneously again Start extension defrosting operation.Extend defrosting operation extend defrosting operation during terminate after the 3rd time H2 at the time of TM3 terminates.Certainly, in during above-mentioned extension defrosting operation, the temperature of evaporator 11 reaches the first temperature TX (defrosting knots Stop also extension defrosting operation when Shu Wendu).

H2 is set as the time shorter than H1 during basic defrosting operation during extending defrosting operation.In the present embodiment, H1 (very first time) is 70 minutes during basic defrosting operation, and H2 (the 3rd time) is 6 minutes during extending defrosting operation.Pass through H2 is set to short during defrosting operation will be extended, and can prevent the excessive temperature of evaporator 11 from rising.Moreover it is preferred that make During user can suitably change above-mentioned setting.

Preferably, above-mentioned second temperature TA is higher than the melting point of ice, and than the target set temperature (such as 5 of refrigerating chamber 3 DEG C) low.That is, second temperature TA can be 0~3 DEG C or so.Moreover it is preferred that defrosting end temp (the first temperature TX) is 5~10 DEG C or so higher than second temperature TA.

By making second temperature TA higher than the melting point of ice, in the state of during ice melts (in latent heat heat exchange), will not arrive Up to the temperature of evaporator 11, so can interpolate that needs carry out extending defrosting operation, so as to reliably remove the knot of residual Frost.In addition, it is low by the target set temperature than refrigerating chamber 3, it can prevent the temperature of evaporator 11 from reaching refrigerating chamber more than 3 also Carry out extending defrosting operation, so as to which heat when preventing that defrosting from operating transmits into refrigerating chamber 3.

In addition, in the present embodiment, the temperature Te1 of the evaporator 11 after the H1 during basic defrosting operation is than second When temperature TA is low, judge that needs carry out adding defrosting operation, but be not restricted to that this, for example, Te1 can be from basic defrosting behaviour Make after terminating to begin to pass through the defined time.In this case, at the end of basic defrosting operation, even if because of defroster 13 driving stop when noise and cause the detected value of temperature detector 15 fluctuate, by using above-mentioned fluctuation recovery after temperature The detected value of detector 15 is spent, can more accurately detect the temperature of evaporator 11.In addition, even if the driving of defroster 13 stops Only, but sometimes heater has heat during certain, so can be after resulting temperature change, detection is evaporated The temperature of device 11.

The ＞ of ＜ embodiments 2

Then, using the flow chart and Fig. 7 shown in Fig. 6 shown in timing diagram, the embodiment of the second operating function will be related to Illustrated as embodiment 2, above-mentioned second operating function is according to the temperature in the arrival very first time (moment TM1) finisher 11 The temperature information declined is spent, judges that needs are carried out adding defrosting operation and driven again.Due to equivalent to basic defrosting behaviour The initial process for making process is same as Example 1 and eliminates explanation, and Fig. 6 only represents the additional defrosting from step S5 to step S8 Operational sequence.

In the present embodiment, after basic defrosting operation stops (step S4), the temperature of the evaporator 11 at moment TM1 is stored Te1 (step S5A).Then, step S5B is advanced to, to after the stipulated time, i.e. by SP1 (the second time) during stopping The TM2 temperature Te2 and TM1 temperature Te1 of evaporator is compared at the time of stored in step S5A at the time of afterwards, judges Whether temperature declines (Te1 >=Te2).When being "Yes" in above-mentioned steps S5B, advance to Y-direction, extend in moment TM2 and defrost Operation starts (step S6) (suitable with Fig. 7 CA23).If in addition, being "No" in step S5B, advance to N directions, no Implement to extend defrosting operation, return to step S8 usual control (suitable with Fig. 7 CA22).

If such as SP1 (the second time) is 5 minutes during stopping, confirming that the temperature Te2 after above-mentioned 5 minutes is It is no lower than temperature Te1, so as to judge whether that needs carry out extending defrosting operation.That is, if it is confirmed that temperature after 5 minutes Te2 (suitable with Fig. 7 CA23) lower than temperature Te1, then judge that needs carry out extending defrosting operation, if it is confirmed that by 5 minutes Temperature Te2 (suitable with Fig. 7 CA22) higher than temperature Te1 afterwards, then judge to carry out extending defrosting operation.

According to above-mentioned composition, after defrosting operation terminates substantially, evaporator is detected by additional defrosting operating function FK2 During 11 Wen Duxiajiang, judge that needs carry out adding defrosting operation, and driven defrosting again after the second time The extension defrosting operation of device 13, so can effectively make the frost thawing do not melted completely.Even if because removing substantially In the state of frost operation end but frost do not melt completely, after the driving of defroster 13 stops, the temperature of evaporator 11 is because residual Stay frost and be gradually reduced.

In addition, in the state of frost substantially thawing at the end of basic defrosting operation, even if the driving of defroster 13 stops After only, it can also utilize heater waste heat and the temperature of evaporator 11 is not declined.Therefore, to (the moment after the very first time TM1 the temperature Te1 of evaporator) and the temperature Te2 of (the at the time of TM2 after the second time) is compared after the stipulated time Compared with, confirm Te1 >=Te2 when, judge needs carry out extend defrosting operation.

In addition, step S6 extension defrosting operation start after, in step S6A, judge evaporator temperature Te whether It more than first temperature TX, if "Yes", then can advance to Y-direction, extension defrosting operation is stopped (step S7) and is returned Generally control (step S8).

In step S6A, if "No", then advance to N directions, judge to drive the duration whether to reach for the 3rd time (moment TM3) (step S6B).In step S6B, if "No", then advance to the N directions of figure and return to step S6A, if For "Yes", then advance to Y-direction, extension defrosting operation is stopped (step S7).

For example, as the CA21 shown in Fig. 7, when reaching the first temperature TX in defrosting operational sequence substantially, remove substantially Frost operation stops.In addition, as CA22, although at the time of at the end of basic defrosting operation TM1 evaporator 11 temperature Te1 does not reach the first temperature TX, but the temperature Te2 of TM2 evaporator 11 is than temperature Te1 at the time of after the second time Gao Shi, only can also waste heat effect be utilized to make in the temperature of evaporator after the stopping of defroster 13 equivalent to residual frost amount The state of the degree risen, so returning to generally control without extending defrosting operation.

But CA23 situation is, the temperature Te1 of TM1 evaporator 11 is not arrived at the time of basic defrosting operation terminates Up to defrosting end temp, and during the stopping of defroster 13, the Wen Duxiajiang of evaporator 11 situation, this is equivalent to residual The state for the degree that frost amount can not more to be melted using the waste heat after the stopping of defroster 13.In this case, addition is passed through Defrost operating function FK2, terminate from basic defrosting operation at the time of TM1 after the stipulated time (after the second time) Moment TM2, defroster 13 is driven again, start to extend defrosting operation.In these cases, the temperature of evaporator 11 is reached and removed During white end temp (the first temperature TX), similarly stop extension defrosting operation.

In addition, in the present embodiment, according to the temperature Te1 of TM1 evaporator 11 at the time of end to basic defrosting operation The result being compared with the temperature Te2 of the evaporator 11 of (the at the time of TM2 after the second time) after the stipulated time, sentences It is disconnected whether to need to carry out extending defrosting operation, but be not restricted to that this, for example, Te1 can be after defrosting operation terminates substantially After the defined time, in addition, Te2 can only shift to an earlier date the defined time compared with by the second time.In addition, generation It is compared for Te1 and Te2, can be according to the temperature from moment TM1 to the evaporator 11 at the regulation moment during moment TM2 Temperature change tendency, judge whether needs carry out extend defrosting operation.

Then, each embodiment for extending the control after defrosting operates is illustrated.Embodiment 3 is extending defrosting operation Further carry out extending defrosting operation again afterwards, embodiment 4 changes defrosting program next time after defrosting operation is extended, implemented Example 5 changes defrosting program next time after defrosting operation is extended again.Therefore, above-described embodiment 3~5 can be with above-mentioned implementation Any one in example 1,2 is combined.

The ＞ of ＜ embodiments 3

Then, using the flow chart and Fig. 9 shown in Fig. 8 shown in timing diagram, carried out following examples as embodiment 3 Illustrate, the embodiment be detect extend defrosting operation at the end of frost do not melt completely temperature information when, judgement need into one Step add defrosting operation and carry out extending defrosting operation again.Fig. 8 is only represented since step S6 extension defrosting operation To the additional defrosting operational sequence of step S8 usual control.

After step S6 extension defrosting operation starts, in step S6A, judge the temperature Te of evaporator whether in the first temperature More than TX is spent, if "Yes", is then advanced to Y-direction, extension defrosting operation is stopped (step S7) and returns to generally control (step Rapid S8).

If being "No" in step S6A, advance to N directions, judge to drive the duration whether to reach for the 3rd time (moment TM3) (step S6B).If being "No" in step S6B, the N directions into figure are advanced and return to step S6A, such as Fruit is "Yes", then advances to Y-direction, extension defrosting operation is stopped (step S7).

After extending defrosting operation stopping (step S7), judge the moment TM3 temperature Te3 of evaporator 11 whether than the second temperature It is low (step S7A) to spend TA, in the case of "Yes", advances to Y-direction, (is passing through the 4th time SP2 after the stipulated time TM4 at the time of afterwards), start to extend defrosting operation (step S7B) (suitable with Fig. 9 CA33) again.If in addition, in step It is "No" in S7A, then advances to N directions, does not implement to extend defrosting operation again, return to step S8 usual control is (with Fig. 9's CA32 is suitable).

Since extending again defrosting operates to the step S7C execution for extending defrosting operation again and stopping for step S7B Step is identical with step S6~step S7, as long as the step of changing the driving duration.

Thus, as shown in Fig. 9 CA33, TM3 at the time of at the end of defrosting operates, the temperature of evaporator are extended even if reaching Te (Te3) also not less than second temperature TA when, opened from TM4 at the time of moment TM3 is after the stipulated time (SP2 during stopping) Begin, most grow at the time of after the 5th time during TM5, i.e., extended again during H3 during extension defrosting operation Defrosting operation.

As described above, in the present embodiment, it is characterised in that by the 3rd after the driving again of defroster 13 is performed TM3 at the time of after time, when making to drive stopping again, again driving stop after after predetermined 4th time (moment TM4), further drive again the defrosting of the extension again operation of defroster 13 (to have and extend defrosting operation again Function).Even if that is, reach forcibly make defroster 13 driving terminate after the 3rd time at the time of TM3, evaporation The temperature Te of device also not less than second temperature TA when, carry out again extend defrosting operation.According to this configuration, in basic defrosting behaviour Played after work and extend defrosting operating function and drive defroster 13 again, when the temperature of evaporator 11 does not rise also, judge to need Carry out further additional defrosting operation and further drive defroster 13 again, thus, it is possible to effectively further make not The frost thawing melted completely.

In addition, in the present embodiment, whether needing to carry out to extend in the judgement (step S7A) of defrosting operation again, sentencing Whether the temperature Te3 of the evaporator 11 at disconnected moment TM3 is lower than second temperature TA, but is that instead of in this, can be with the step of embodiment 2 Rapid S5A, S5B are same, are inclined according to the temperature change of the evaporator 11 of different two time point during moment TM3~moment TM4 To judging whether, which needs progress to extend defrosting again, operates.

The ＞ of ＜ embodiments 4

Then, using Figure 10 flow chart and Figure 11 shown in timing diagram, said following examples as embodiment 4 Bright, the embodiment changes removing next time in the temperature information that frost does not melt completely at the end of detecting to extend defrosting operation White program.Above-mentioned embodiment changes the drive condition of the defroster 13 suitable with thick line L1 shown in Fig. 3 and carried out next Secondary defrosting operation.In addition, Figure 10 only represents that the usual control to step S8 since step S6 extension defrosting operation chases after Add defrosting operational sequence.

After step S6 extension defrosting operation starts, in step S6A, judge the temperature Te of evaporator whether in the first temperature More than TX is spent, if "Yes", is then advanced to Y-direction, extension defrosting operation is stopped (step S7) and returns to generally control (step Rapid S8).

If being "No" in step S6A, advance to N directions, judge to drive the duration whether to reach for the 3rd time (moment TM3) (step S6B), if "No", then to the N directions advance of figure and return to step S6A, if "Yes", then to Y Direction is advanced, and after extension defrosting operation is stopped (step S7), is carried out defrosting programing change operation (step S7D) and is returned logical Often control (step S8).

For example, CA33 (reference picture 9) as shown in embodiment 3, even if at the end of reaching and extending defrosting operation Moment TM3, the temperature Te (Te3) of evaporator also not less than second temperature TA when, can interpolate that the frosting degree of evaporator 11 is a lot Or the environment in 11 easy frosting of evaporator (has been put into the food of high humidity or the opening time length of refrigerator doors 3a, 4a in refrigerator Deng).In this state, even if defrosted with the defrosting step same with embodiment 1 or embodiment 2 next time, it is also difficult to Remove the frost of evaporator 11.

Therefore, in the present embodiment, when judging to be in above-mentioned state, by changing basic defrosting operational sequence OP1 or chasing after Add defrosting operational sequence OP2 defrosting program, improve defrosting ability, can more reliably remove the frost of evaporator 11.

H1 extends or makes extension during defrosting programing change operates the basic defrosting operation that can enter to exercise defroster 13 The change that H2 extends during defrosting operation.Both H2 prolong during H1 during basic defrosting operation can also be made and extend defrosting operation It is long.Furthermore, it is possible to it is heater is exported increased change.Therefore, in the present embodiment, even if carrying out extending defrosting operation When also not defrosting completely, in the operation that defrosts next time, the progress longer time, which defrosts, to be operated, or makes heater output raise Carry out defrosting operation.

Above-mentioned defrosting programing change operation is carried out by control unit 24 itself.That is, the control unit 24 of present embodiment has such as Lower defrosting programing change operating function：Judge TM3 at the time of after the 3rd time, the driving again of defroster 13 stops When defrosting it is still insufficient when, enter to exercise that very first time H1 is longer than original setting time, the 3rd time H2 is set than original Output that is long, making Defrost heater of fixing time such as raise at the setting change, carries out defrosting next time and operates.

Therefore, the additional defrosting operating function FK2 of the present embodiment have additional defrosting operation whether arbitration functions, extend and remove White operating function and defrosting programing change operating function.

Figure 11 represents to change sequential during defrosting program using the defrosting programing change operating function shown in the present embodiment Figure.CA41 shown in Figure 11 is identical with the CA33 shown in embodiment 3, extends TM3 at the time of at the end of defrosting operates even if reaching, The temperature Te (Te3) of evaporator is also not less than second temperature TA.In this case, become in the present embodiment using the program that defrosts More operating function changes defrosting program.

CA42 is the situation for implementing the defrosting programing change for making H1 during basic defrosting operation extend to H1a.Thus, lead to Crossing makes to extend during basic defrosting operation, provides more heats to evaporator 11, in the above example, is grasped by basic defrosting The temperature Te1a of TM1a evaporator 11 is higher than second temperature TA at the time of during work after H1a.Therefore, do not implement to extend defrosting behaviour Make.

CA43 is make the elevated defrosting program of output of the Defrost heater in basic defrosting operational sequence OP1 to become Situation more.Thus, the output of Defrost heater is improved, more heats are provided to evaporator 11, in the above example, is passed through The temperature Te1 of TM1 evaporator 11 is higher than second temperature TA at the time of during basic defrosting operation after H1.Therefore, do not implement to prolong Long defrosting operation.

Thus, improved by using defrosting programing change operating function and defrost ability next time to carry out defrosting operation, energy Enough frosts for more reliably removing evaporator 11.

In addition, if keeping having carried out the state of above-mentioned defrosting programing change, then make evaporation in the state change of refrigerator When the frosting degree of device 11 is reduced, it is possible to make cooling effectiveness decline or the Thermal Cutoffs 14 of refrigerator because evaporator 11 overheats Fusing.Therefore, the programing change operating function that defrosts has the function for the defrosting program recovery original state for making change.For example, remove substantially During frost operation, when the temperature Te of evaporator 11 reaches the first temperature TX, basic defrosting operational sequence OP1 defrosting ability is judged Excessive relative to current state, defrosting programing change operating function can make the defrosting program recovery original state of change.In addition, can To make defrosting program recovery original state not implement to extend defrosting operation etc. for condition.

According to said structure, using basic defrosting operation and extension defrosting operation defrost for the first time operates and has failed During full defrosting, change over the elevated new defrosting program of defrosting ability and carry out defrosting operation next time, so can form i.e. Make to be attached to the frost on evaporator 11 it is more also can effectively be defrosted remove defrosting system.

The ＞ of ＜ embodiments 5

Even if the operation of defrosting programing change can also be held performing again to extend when defrosting operation can not defrost completely OK.Using the flow chart shown in Figure 12, illustrated above-described embodiment as embodiment 5.

Defrosting operational sequence shown in Figure 12 flow chart is the defrosting of extension again in the embodiment 3 illustrated using Fig. 8 Operation stops (step S7C) additional defrosting programing change operation (step S7D) afterwards.Because others composition is same as Example 3, So eliminate detailed description.

That is, the additional defrosting operating function FK2 of the present embodiment has：Additional defrosting operation whether arbitration functions, extend and remove White operating function, extend defrosting operating function and defrosting programing change operating function again.According to this composition, defrosting substantially Operation and extend defrosting operation on the basis of implement again extend defrosting operation in the case of, change and be set for next time Defrost the defrosting program operated.Therefore, under the situation more than the frost being attached on evaporator 11, defrosting operation next time Suitable defrosting program is amenable to, defrosting system is removed so as to be configured to be more effectively carried out defrosting.

As illustrating in 1~embodiment of above-described embodiment 5, refrigerator 1 of the invention is possessing basic defrosting operating work On the basis of energy FK1, possesses additional defrosting operating function FK2, the addition defrosts operating function FK2 according to the basic operation knot that defrosts The temperature information of evaporator 11 after beam, carry out extending defrosting operation.In addition, additional defrosting operating function FK2 has：Addition removes Frost operation whether arbitration functions, extend defrosting operating function, again extend defrosting operating function and defrosting programing change operating work Energy, and can will extend the operation that defrosts, extend defrost operation and defrost programing change operation individually operation or group again Closing operation.

Using Figure 13, further above-mentioned defrosting program is formed and illustrated.As shown in figure 13, the institute of refrigerator 1 of the invention What is had returns to the basic defrosting operational sequence OP1 generally controlled except defrosting system can be implemented only to perform after basic defrosting operates. Furthermore it is possible to implement to carry out the additional defrosting operational sequence OP2 for adding defrosting operation on the basis of basic defrosting operation.

Additional defrosting operational sequence OP2 includes：First adds defrosting operational sequence OP21, on the basis of basic defrosting operation On carry out extend defrosting operation；Second adds defrosting operational sequence OP22, and the base of defrosting operation is operated and extend in basic defrosting Extended defrosting operation on plinth again；3rd adds defrosting operational sequence OP23, in basic defrosting operation, extends defrosting operation Extend again on the basis of defrosting operates and carry out the programing change operation that defrosts；And the 4th add defrosting operational sequence OP24, The programing change operation that defrosts is carried out on the basis of basic defrosting operation and extension defrosting operation.

Therefore, (first adds defrosting operative employee to refrigerator 1 of the invention by the above-mentioned additional operational sequence OP2 that defrosts of application Sequence OP21~4th adds defrosting operational sequence OP24), even if the white sudden change being attached on evaporator 11 is more or in day The increased situation of perseverance, also can while suppress defroster 13 abnormal heating, while effectively defrosted.

For example, when only not terminating defrosting with the operational sequence OP1 that defrosts substantially, first, on the basis of basic defrosting operation Upper perform extends defrosting operation, thus, it is possible to tackle paroxysmal frosting degree increase.Further, since in the increase of frosting degree routine In the case of, turn into and perform extension defrosting operation repeatedly or can not be fully completed defrosting even if performing and extending the operation that defrosts Situation, so in this case, by using defrosting operation and/or defrosting programing change operation is extended again, one can be entered Step plays defrosting effect.

As described above, solve to be with the method for 1 corresponding problem of technical scheme, there is provided a kind of refrigerator 1, its Including：Evaporator 11, generate cold air；Cold air path (the first cold air path 7, the second cold air path 8), circulate cold air；Defrosting dress 13 are put, evaporator 11 is defrosted；Storeroom, the cold air cooling circulated by cold air path；Temperature detector 15, detection The temperature of evaporator 11, the refrigerator 1 have control unit 24, and there is the control unit 24 temperature carried out using temperature detector 15 to examine Brake and clocking capability, and the driving to defroster 13 is driven, and control unit 24 has basic defrosting operating function FK1, the operating function FK1 that defrosts substantially reach the predetermined very first time in the driving duration for judging defroster 13 When (moment TM1) and when judging the temperature predetermined first temperature TX of arrival of evaporator 11, make the drive of defroster 13 Dynamic stopping, and the control unit has additional defrosting operating function FK2, and the addition defrosts operating function FK2 according to arrival first The temperature information of the evaporator 11 detected during the time, judge whether that needs carry out adding defrosting operation, and in the stopping Afterwards after predetermined second time (moment TM2), again drive defroster 13.

It is after the basic defrosting operation of defroster 13 terminates, to pass through control with 1 corresponding effect of above-mentioned technical proposal Portion 24, when judging that needs add defrosting operation according to the temperature information of evaporator 11, driven again after the stipulated time Dynamic defroster 13, thus can while suppress defroster 13 abnormal heating, while the frost that effectively makes completely not melt melt. In addition, when judging to carry out adding defrosting operation according to the temperature information of evaporator 11, operated without additional defrosting, institute So that the bad phenomenon as caused by the excessive driving of defroster can be prevented.I.e., it is proposed, according to the invention, can obtain having and remove as follows The refrigerator 1 of defrosting system：Even if the frost being attached on evaporator 11 is more, the ease of use damaged in user is there will not be, can While suppress defroster 13 abnormal heating, while effectively defrosted.

Solution is that temperature information is when reaching the very first time (moment TM1) with the method for 2 corresponding problem of technical scheme Whether the temperature of the evaporator 11 detected is less than the information than the first temperature TX low temperature and predetermined second temperature TA, Additional defrosting operating function FK2 judges that needs carry out adding defrosting operation when the temperature is lower than second temperature, is driven again The extension defrosting operation of dynamic defroster 13.It is with 2 corresponding effect of above-mentioned technical proposal, when the driving of defroster 13 continues Between when reaching the predetermined very first time, i.e. at the end of moment TM1, the temperature of evaporator 11 represents for basic defrosting operation During lower than second temperature TA temperature information, judge the state do not melted completely in frost and judge that needs carry out adding defrosting behaviour Make, extend defrosting operation driving defroster 13 again after the stipulated time, so can effectively make not complete The frost thawing melted entirely.

Solution is that temperature information is, at the end of basic defrosting operation with the method for 3 corresponding problem of technical scheme The temperature of evaporator 11 and the temperature of the evaporator 11 after the stipulated time hereafter are compared, the letter whether temperature declines Breath, additional defrosting operating function FK2 judge that needs carry out adding defrosting operation when confirming and dropping at this temperature, driven again The extension defrosting operation of defroster 13.It it is the driving duration of defroster 13 with 3 corresponding effect of above-mentioned technical proposal The predetermined very first time is reached, after stopping basic defrosting operation, detects the Wen Duxiajiang of evaporator 11 temperature letter During breath, judge to represent the white state completely do not melted and judge that needs carry out adding defrosting the operation, (moment after the second time TM2) carry out driving the extension defrosting operation of defroster 13 again, so can effectively make the frost thawing do not melted completely.

Solution is with the method for 4 corresponding problem of technical scheme, and the first temperature is reached in the temperature for judging evaporator 11 During TX or judge duration for driving again have passed through the time shorter than the very first time and the 3rd time set in advance (when Carve TM3) when, make to drive stoppings again, it is additional defrost operating function FK2 after the 3rd time (moment TM3) drive again During stopping, judging again driving stop after after predetermined 4th time (moment TM4), if need into traveling One step drives the extension again of defroster 13 to defrost and operated again.It is with 4 corresponding effect of above-mentioned technical proposal, even in base This defrosting operation by additional defrosting operating function drives defroster 13 again after terminating, and is evaporated in defined driving time When the temperature of device 11 does not also rise and do not reach defrosting stopping temperature, judge whether to need to carry out the further additional behaviour that defrosts Make, when judgement needs to carry out, defroster 13 is further being driven again after the stipulated time, thus, it is possible to effectively make not The frost thawing melted completely.

Solution is with the method for 5 corresponding problem of technical scheme, judges that the temperature of evaporator 11 reaches the first temperature TX When or duration for driving again of judgement when have passed through three time set in advance of the time shorter than the very first time, make Drive and stop again, additional defrosting operating function FK2 is carried out in (moment TM3) driving stopping again after the 3rd time Enable the very first time of basic defrosting operating function longer than original setting time or improve the defrosting of basic defrosting operating function The setting change of at least one party in power, carry out basic defrosting operation next time.It is with 5 corresponding effect of above-mentioned technical proposal, When remove white by the defrosting operation comprising basic defrosting operation and the first time for extending defrosting operation, change defrosting time or One or both in defrosting ability, basic defrosting operation next time is carried out, so can form even in being attached to evaporator What also can effectively be defrosted in the state of more than frost on 11 removes defrosting system.

Extend defrosting operating function in addition, additional defrosting operating function FK2 can have, extend defrosting operating function again With defrosting programing change operating function, played after the operating function that defrosts is extended and extend defrosting operating function again, and Perform and play defrosting programing change operating function after extending defrosting operating function again.According to above-mentioned composition, in basic defrosting behaviour Make and extend on the basis of defrosting operation when implementing to extend again defrosting operation, change to defrost next time and program and be set as new Program, defrosting system is removed as follows so can form：Under the situation more than the frost being attached on evaporator 11, it can also change For suitable defrosting program, can effectively further be defrosted.

As described above, it is proposed, according to the invention, frosting is not melted and remained completely when basic defrosting operation has been carried out Under situation, by judging whether that needs carry out adding defrosting operation and again driving defrosting dress according to the temperature information of evaporator 11 Put 13 additional defrosting operating function, when judging that needs add defrosting operation, the warp after defroster 13 temporarily ceases After spending the stipulated time, drive again to perform extension defrosting operation, so the ice with following except defrosting system can be obtained Case 1：Even if the frost being attached on evaporator 11 is more, the ease of use damaged in user is there will not be, being capable of side suppression defrosting The abnormal heating of device 13, side are effectively defrosted.

In addition, the change of the design temperature or outside air temperature for refrigerator, can also realize suitable defrosting process, so Be for the user improve convenience remove defrosting system.

Industrial applicibility

Therefore, refrigerator of the invention can be well applied to following refrigerator：Contemplate the food for being put into high humidity indoors Situation it is more, for a long time or frequent switch on door situation it is more and adhere to situation more than frost on an evaporator.

Description of reference numerals

1 refrigerator

2 heat insulating boxes

3 refrigerating chambers

4 refrigerating chambers

7 first cold air paths

8 second cold air paths

10 compressors

11 evaporators

12 fans

13 defrosters

14 Thermal Cutoffs

15 temperature detectors

24 control units

FK1 defrosts operating function substantially

FK2 adds defrosting operating function

OP1 defrosts operational sequence substantially

OP2 adds defrosting operational sequence

The temperature of TX first (defrosting end temp)

TA second temperatures (design temperature)

TM1 (after the very first time) moment

TM2 (after the second time) moment

TM3 (after the 3rd time) moment

TM4 (after the 4th time) moment

The temperature of Te evaporators

Claims (6)

1. a kind of refrigerator, it includes：Evaporator, generate cold air；Cold air path, circulate cold air；Defroster, to the evaporator Defrosted；Storeroom, the cold air cooling circulated by the cold air path；Temperature detector, detect the evaporator Temperature, the refrigerator have control unit, and the control unit has the temperature detecting function carried out using temperature detector and timing Function, and the driving to the defroster is controlled,

The refrigerator is characterised by,

The control unit has basic defrosting operating function, and the basic defrosting operating function is judging the drive of the defroster When the dynamic duration reaches the predetermined very first time and judge that the temperature of the evaporator reaches predetermined first During temperature, stop the driving of the defroster,

And the control unit has additional defrosting operating function, when the additional defrosting operating function is according to the very first time is reached Whether the temperature of the evaporator detected is less than than the first temperature low temperature and predetermined second temperature, judges whether Need to carry out adding defrosting operation, judge that needs carry out adding defrosting operation when the temperature is lower than second temperature, stop described After only after predetermined second time, driven again the defroster extension defrost operation.

2. refrigerator according to claim 1, it is characterised in that

When the temperature for judging evaporator reaches the first temperature or duration for driving again of judgement have passed through and compare the very first time During the short time and set in advance three time, the driving again stops,

The additional defrosting operating function is when driving stops again after reaching for the 3rd time, the process after driving again stops After predetermined 4th time, judge whether to need to carry out the defrosting behaviour of extension again for further driving defroster again Make.

3. refrigerator according to claim 1, it is characterised in that

When the temperature for judging evaporator reaches the first temperature or duration for driving again of judgement have passed through and compare the very first time During the short time and set in advance three time, the driving again stops,

The additional defrosting operating function enters to exercise the basic defrosting in the stopping of driving again after the 3rd time The very first time of operating function is longer than original setting time or makes what the defrosting ability of the basic defrosting operating function improved The setting change of at least one party, carry out basic defrosting operation next time.

4. a kind of refrigerator, it includes：Evaporator, generate cold air；Cold air path, circulate cold air；Defroster, to the evaporator Defrosted；Storeroom, the cold air cooling circulated by the cold air path；Temperature detector, detect the evaporator Temperature, the refrigerator have control unit, and the control unit has the temperature detecting function carried out using temperature detector and timing Function, and the driving to the defroster is controlled,

The refrigerator is characterised by,

The control unit has basic defrosting operating function, and the basic defrosting operating function is judging the drive of the defroster When the dynamic duration reaches the predetermined very first time and judge that the temperature of the evaporator reaches predetermined first During temperature, stop the driving of the defroster,

And the control unit has additional defrosting operating function, the additional defrosting operating function will be examined when reaching the very first time The temperature for the evaporator measured and the temperature of the evaporator after the stipulated time hereafter are compared, and according to Whether temperature declines to judge whether that needs carry out adding defrosting operation, judges that needs are added when confirming and dropping at this temperature Defrosting operation, after the stopping after predetermined second time, driven prolonging for the defroster again Long defrosting operation.

5. refrigerator according to claim 4, it is characterised in that

When the temperature for judging evaporator reaches the first temperature or duration for driving again of judgement have passed through and compare the very first time During the short time and set in advance three time, the driving again stops,

The additional defrosting operating function is when driving stops again after reaching for the 3rd time, the process after driving again stops After predetermined 4th time, judge whether to need to carry out the defrosting behaviour of extension again for further driving defroster again Make.

6. refrigerator according to claim 4, it is characterised in that

When the temperature for judging evaporator reaches the first temperature or duration for driving again of judgement have passed through and compare the very first time During the short time and set in advance three time, the driving again stops,

The additional defrosting operating function enters to exercise the basic defrosting in the stopping of driving again after the 3rd time The very first time of operating function is longer than original setting time or makes what the defrosting ability of the basic defrosting operating function improved The setting change of at least one party, carry out basic defrosting operation next time.