CN110131952A

CN110131952A - Combine refrigerating appliance

Info

Publication number: CN110131952A
Application number: CN201910089231.7A
Authority: CN
Inventors: A·巴布克; S·霍尔策; S·舍兴格
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2018-02-08
Filing date: 2019-01-30
Publication date: 2019-08-16
Also published as: DE102018202008A1

Abstract

A kind of refrigerating appliance, particularly Domestic refrigerator, it includes the first storage cell compartment and the second storage cell compartment (3,2), wherein the two storage cell compartments (3,2) it is respectively provided with the temperature sensor (14,13) for detecting refrigeration demand；Refrigerant-cycle systems, it is connected in series in the refrigerant-cycle systems by arrangement, the evaporator (7) in upstream for cooling down the first storage cell compartment (3) and the evaporator (6) in downstream for cooling down the second storage cell compartment (2) that the first capillary and the second capillary (21,22) are constituted；Valve (18) can block the refrigerant stream via at least one capillary in the capillary (21,22) by the valve；With control unit (12), described control unit setting is for according to the position for selecting the valve (18) in the storage cell compartment (2,3) for wherein detecting refrigeration demand.

Description

Combine refrigerating appliance

Technical field

The present invention relates to a kind of combination refrigerating appliance, there is the first storage cell compartment and the second storage cell compartment, typically just The refrigerating appliance of normal compartment and freezing cell compartment, the first storage cell compartment and the second storage cell compartment are common by being connected to Evaporator in refrigerant-cycle systems is kept at different temperature.

Background technique

In the combination refrigerating appliance of the first kind, evaporator is arranged in parallel in refrigerant-cycle systems and can Optionally apply refrigerant by distributing valve.When in storage cell compartment there are when refrigeration demand, then the evaporator list of the storage chamber Solely supplied by input liquid refrigerant.In order to which energy efficient is cooling, the temperature and the storage cell compartment of cell compartment are stored Difference between the temperature of compressor does not allow excessive.For this purpose, in the evaporator of freezing cell compartment and the evaporator of normal compartment In must keep different evaporating pressures.Therefore allow, when the evaporator of normal compartment is supplied, make refrigerant vapour The evaporator of freezing cell compartment cannot be flowed back into；For making refrigerant-cycle systems with valve needed for freezing cell compartment evaporator decoupling It complicates and manufactures with expending.It is normal to refrigerate however if the evaporator and refrigerant-cycle systems of freezing cell compartment decouple The operating point of the evaporator of cell compartment and how many refrigerant flow in the evaporator of freezing cell compartment and thus from refrigerant circulation System discharge is related, this is but also the control combination refrigerating appliance becomes difficult.

In the combination refrigerating appliance of Second Type, evaporator is arranged in series in refrigerant-cycle systems.The refrigeration The agent circulatory system is simple and low-cost in structure, because not needing valve so that power range is from refrigerant circulation system System decoupling, and because the amount of the refrigerant of circulation is identical always.It is in this disadvantage is that, because in the two evaporators The mass flow of refrigerant be equal always, so the storage cell compartment cannot be cooled down independently of one another.Therefore, described group The compressor for closing refrigerating appliance is mostly just controlled according to the temperature of normal compartment, and freezes the temperature of cell compartment according to ring Border temperature is variable.If environment temperature is more than the temperature range designed for the utensil, long compressor operating time Cause to freeze the unwanted low temperature of cell compartment and thus leads to the energy consumption increased；If environment temperature is lower than the temperature model It encloses, then the short runing time of compressor leads to freeze undesirable temperature in cell compartment and increases.

The combination refrigerating appliance of aforementioned second type as known in 10 2,015 211 963 A1 of DE, wherein in refrigerant Single capillary is substituted in the upstream of two evaporators in the circulatory system and the arranged in series of two capillaries is set, and is borrowed Help reversal valve and branch line that refrigerant stream can be directed through to a capillary in the capillary.Therefore, by changing To two different operating points of the adjustable evaporator positioned at capillary downstream of valve, wherein a such as operating point is realized and is steamed Efficient, the continuous cooling operation and the realization of another operating point of hair device promptly freeze the cooled material being newly packed into.

Summary of the invention

Task of the invention lies in provide a kind of refrigerating appliance of evaporator with series connection, the refrigerating appliance It runs and keeps sufficiently low temperature in colder storage cell compartment with realizing energy efficient in the big range of environment temperature.

The task is solved by a kind of refrigerating appliance, particularly Domestic refrigerator, include the first storage cell compartment and Second storage cell compartment, the wherein at least described second storage cell compartment have the temperature sensor for detecting refrigeration demand；Refrigerant The circulatory system, the arrangement being made of in the refrigerant-cycle systems the first capillary and the second capillary, for cooling down One connects with storing the first evaporator of cell compartment and the second evaporator series for cooling down the second storage cell compartment；Valve passes through institute Refrigerant stream via at least one capillary in the capillary can be blocked by stating valve；And control unit.First compartment Room also has the temperature sensor for detecting refrigeration demand, and control unit setting detects refrigeration for basis wherein The storage cell compartment of demand selects the position of the valve.

According to valve position, the different flow resistances of capillary in parallel cause, real under the given revolving speed of compressor The slave compressor that refrigerant is assigned to refrigerant-cycle systems is now extended up into the high-pressure area of capillary and is prolonged from evaporator Stretch the area of low pressure returned to.Flow resistance is bigger, then fewer liquid refrigerant is provided in area of low pressure, and is existed The share of the liquid refrigerant evaporated in first evaporator is bigger.It is possible thereby to control available cooling by the valve Distribution on power to the first storage cell compartment and the second storage cell compartment, and the two storage cell compartments can be in the big of environment temperature In the range of be maintained on nominal operating temperature.

The arrangement of capillary can be the identical arrangement as described in 10 2,015 211 963 A1 of DE, That is, the parallel arrangement of the first capillary and its branch line is connected in series with the second capillary.It is however preferable that The parallel arrangement of first capillary and the second capillary.

The valve is reversal valve, and the valve blocks the first capillary in first position and blocks institute in the second position State the second capillary.Thus when the only one capillary in the two capillaries at any time is flowed through by refrigerant, then The two capillaries should be different in its flow resistance.Because for manufacture supply the reason of the two capillaries should Cross section having the same, so the capillary is preferably different over its length.

Alternatively, the valve also may include the first shut-off valve, and the first shut-off valve and the first capillary are with arranged in series Mode connects, and the arranged in series is connect with the second capillary paralleling again.Thus shut-off valve cannot block the second capillary； Mass flow different in refrigerant-cycle systems, i.e., the refrigerant in the first position of the valve are obtained by following situations at this It flows only through the second capillary and in the second position while flowing through the two capillaries；The capillary need not have difference Size.

Additionally, the second shut-off valve is connect in a manner of arranged in series with the second capillary.

When the second shut-off valve can independently be controlled with the first shut-off valve, then it can be realized most four switchings shapes State, correspondingly a shut-off valve is opened in wherein two switching states and another shut-off valve is closed, and every at remaining The two shut-off valves are opened in one state or the two shut-off valves are closed.

There are two the high pressures that the switching state for the shut-off valve closed prevents the refrigerant-cycle systems when compressor stops for tool Pressure balance between region and area of low pressure and the energy efficiency for thus improving refrigerator utensil.

Because due to the series circuit of evaporator make the second evaporator only receive it is remaining in the first evaporator also Unevaporated liquid refrigerant, the degree of filling of second evaporator averagely less than the degree of filling of the first evaporator, and for The cooling power used is lesser.Therefore, the running temperature of the second storage cell compartment should be than the operation temperature of the first storage cell compartment Degree is high.

Apparent pressure drop from the first evaporator to the second evaporator is undesirable herein, so in the two evaporations There should not be the narrow in refrigerant line between device.Therefore, the pipe of single type can be advantageously at least from the first evaporation The outlet of device extends to the entrance of the second evaporator.It is desirable that the pipe of a unique single type does not merely comprise the two evaporations Connection between the refrigerant line and the composition evaporator of device.

The matter in different valve positions has been determined in the relationship in different valve positions between the flow resistance of capillary Measure flow how degree it is different.In order to obtain according to valve position to the visibly different supply of the second evaporator, it should measure The volume of one evaporator, to be mentioned under small mass flow in the available refrigerant of low-pressure side in the first valve position For spaces as whole as possible, and it additionally should also be filled up completely the second evaporator as far as possible in the second valve position.First Set two positions that can be aforementioned reversal valve with the second position.In the case where using two shut-off valve, in first position First shut-off valve of the two shut-off valves is opened and the second shut-off valve is closed.In the second position, the two shut-off valves are opened, Or second shut-off valve open and the first shut-off valve close.

Second alternative of the two alternatives is preferably as the valve position that the two shut-off valves are opened can For being rapidly cooled mode.

The difference of mass flow is smaller in two valve positions, then the volume of the first evaporator thus with the second evaporator Volume is compared should be bigger.Therefore, the structure of refrigerant-cycle systems according to the present invention, which is particularly suitable for realizing, has big The combination refrigerating appliance, particularly following utensils of first cooling cell compartment, the volume of the first cooling cell compartment is at least in the utensil The half of the volume of second cooling cell compartment.

The flow resistance of capillary should match with the volume of evaporator, to realize the second evaporator according to valve position Difference at least 20%, preferably at least 50% degree of filling.The degree of filling difference is bigger, and the range of environment temperature is wider, The nominal operating temperature of the two storage cell compartments can be kept in the range of the environment temperature.

In order to converge two capillaries, T-piece can be arranged in a common input site of the first evaporator Upstream.The capillary converges at the T-piece, however the release and thus caused cooling for avoiding refrigerant herein May due to the pipeline converged at T-piece narrow cross section and there are problems.The problem can be to avoid mode is institute It states capillary and is passed into the first evaporator at a common input site or at the separated input site in two positions In.

Alternatively, the two capillaries converge at T-piece, and the T-piece is arranged in the heat-insulated material for surrounding storage cell compartment On the inside of the bed of material；Refrigerant can then be born in the pipe for making cross section that capillary connect with the first evaporator, larger Release.

The two capillaries should with extended to from the second evaporator compressor suction tube constitute inside heat exchanger.

Detailed description of the invention

Other features and advantages of the present invention are obtained with reference to attached drawing by the following the description of embodiment.In attached drawing:

Fig. 1 shows the schematical sectional view of refrigerating appliance according to the present invention；

Fig. 2 shows the block diagrams of refrigerant-cycle systems from FIG. 1；

Fig. 3 shows the flow chart of the work step by the control unit execution of refrigerating appliance；

Fig. 4 shows the detail view of the refrigerating appliance according to the first configuration；

Fig. 5 shows the detail view according to the first configuration；With

Fig. 6 shows the block diagram of a replacement of refrigerant-cycle systems.

Specific embodiment

Fig. 1 shows combination refrigerating appliance according to the present invention with schematical sectional view.Two are opened up in heat-insulated shell 1 A storage cell compartment 2,3, typically normal compartment and freezing cell compartment.The storage cell compartment 2 of top is closed by door 4.Lower section Storage cell compartment 3 equally can have door or be configured to drawer element as illustrated in fig. 1, and there is the drawer element gear to lean against ontology Heat-insulated foreboard 5 on 1 frame.

Each storage cell compartment 2,3 is cooling by a unique evaporator 6 or 7.Fig. 1 is schematically illustrated above The cold wall evaporator 6 and evaporator without frost 7 in cell compartment 2 are stored, the cold wall evaporator is placed to restriction in the usual manner and deposits It puts the internal container 32 on 2 boundary of cell compartment and surrounds between the insulation material layer 33 of internal container 32, the evaporator without frost passes through Partition wall 8 is separated with the storage cell compartment 3 of lower section, and air is passed through the frostless evaporation from the storage pumping of cell compartment 3 by ventilation blower 9 Device.For the two cell compartments 2,3 also it is contemplated that other kinds of evaporator.

Compressor 10 is placed on the bottom of the rear side of ontology 1 in machine chamber groove 11.Electronic control unit 12 is with public affairs The mode known controls compressor 10 according to the temperature measured in storage cell compartment 2,3 by temperature sensor 13,14, that is, It says, when the temperature in a storage cell compartment in the storage cell compartment 2,3 is more than the connection temperature corresponding to the storage cell compartment, The then operation phase of the electronic control unit starting compressor 10, and if being also less than another storage cell compartment during this period In connection temperature, then terminate the fortune of the compressor in the case where reaching the closing temperature in the storage cell compartment described in the former Row order section.Condenser 15 can be placed on the rear side of 11 top of machine chamber groove as illustrated or preferably force It is placed in machine chamber groove 11 to ventilation.

Fig. 2 shows the structure of refrigerant-cycle systems, compressor 10, condenser 15 and steaming in the refrigerant-cycle systems Hair device 6,7 is connected to each other.Refrigerant pipe 17 is extended up to from the pressure interface 16s of compressor 10 by condenser 15 first The reversal valve 18 controlled by control unit 12.Two branch lines 19,20 are from reversal valve 18s, described two branch lines A branch line 19 include capillary 21 and another branch line 20 include capillary 22.Capillary 21,22 has Different flow resistances.Preferably, the two capillaries pipe cross section having the same and over its length difference.

Converge at T-piece 23 again the end in downstream of capillary 21,22.It is lower section in T-piece 23 first Cell compartment 3 evaporator 7, be followed by connecting tube 24 and finally top cell compartment 2 evaporator 6.Connecting tube 24 is integrally Extend and at least there is thick-and-thin cross section from the entrance for being exported to evaporator 6 of evaporator 7；The connecting tube can also To be integrally connected with the refrigerant pipe of an evaporator or another evaporator in the evaporator.Especially when this two When a evaporator is configured to plate-fin evaporator, then a unique integrally continuous pipe constitutes the refrigeration of the two evaporators Agent pipe and connecting tube 24.

Suction tube 25 extends to the pumping surfaces 26 of compressor 10 from evaporator 6.The two capillaries 21,22 are in suction tube It is connect on 25 section, particularly in 25 inside of suction tube or on the surface of the suction tube with the close underground heat of suction tube 25 Touching, to constitute internal heat exchanger 27, on the road to evaporator 7 in a capillary in the capillary 21,22 On diameter, compressed refrigerant is pre-cooled in the heat exchanger by refrigerant vapour, and the refrigerant vapour is being taken out Suction pipe Lu Zhongcong evaporator 6 flows to compressor 10.

Capillary 21 has the flow resistance smaller than capillary 22.The flow resistance measures in this way, i.e., in compressor 10 It is opened by the path of capillary 21 by reversal valve 18 in operation phase, liquid refrigerant fills up first in this phase of operation Evaporator 7 in more lower position and the major part for then also filling up the evaporator 6 in higher position.Therefore, the two It is cooled to store cell compartment 2,3.The size of evaporator 6,7 selects in this way, so that in the environment temperature for being designed for refrigerating appliance Lower temperature is in storage cell compartment 2 than quickly reducing in storage cell compartment 3.

When the path by capillary 22 is opened by reversal valve 18, then in hair compared with when capillary 21 is opened The amount that the refrigerant in condenser 15 is accumulated in front of tubule is bigger.Low voltage section of the amount of the refrigerant in refrigerant-cycle systems In point, it is sufficiently used for filling evaporator 7 with liquid refrigerant under any circumstance at this time in the downstream of capillary 21,22；Substantially On only refrigerant vapour also reach in evaporator 6.Thus effectively cooled and stored cell compartment 3, and be assigned in storage cell compartment 2 Cooling power is enough or is not sufficiently used for for the temperature reduction slower than in storage cell compartment 3 under any circumstance Heat is balanced from ambient enviroment to the inflow in storage cell compartment 2.

Fig. 3 shows the flow chart of the illustrative work step of control unit 12.It examines in step sl, in storage cell compartment It whether there is refrigeration demand in 2, i.e. whether the temperature T2 of storage cell compartment 2 measured by temperature sensor 13, which is greater than, determines for depositing Put the connection threshold value T2 of cell compartment 2_ein.If YES, then control unit 12 controls reversal valve 18, to open (S2) for refrigerant Path and connection (S3) compressor 10 by capillary 21.Thus evaporator 7 is first filled with liquid refrigerant and connect Filling evaporator 6, and the two storage cell compartments 2,3 are cooled.(when evaporator 7 be as illustrated in fig. 1 have it is corresponding When the evaporator without frost of ventilation blower 9, then ventilation blower 9 remains turned-off in this case, so as to keep the evaporation in evaporator 7 compared with It is low and quickly liquid refrigerant is also supplied in evaporator 6.) this state is kept, until determining in step s 4, deposit It puts cell compartment 2 and is cooled to closing threshold value T2_aus.There is no (S5) refrigeration to need if this is the case and in storage cell compartment 3 It asks, then closes (S6) compressor again, and the method repeats after the waiting time.

When refrigeration demand is not present in storing cell compartment 2 in step sl, then examine in the step s 7 in storage cell compartment 3 In refrigeration demand.When refrigeration demand also is not present there, then the method repeats after the waiting time.It is made when existing When cold demand, then the path by capillary 22 and starting compressor 10 (S8, S9) are opened, and the method reaches step S11。

If crossing the refrigeration demand identified in storage cell compartment 3 in step s 5, switch in the operation of compressor 10 (S10) reversal valve 18.The method also reaches step S11 in this case.In this step, it examines and is depositing again first Put the presence of the refrigeration demand in cell compartment 2；When the refrigeration demand is directly satisfied in step s 4 in advance, then there is no the refrigeration Demand；Thus the method reaches step S12, examine in this step, and whether the temperature T3 stored in cell compartment 3 drops to closing Threshold value T3_aus.If NO, then the method returns to step S11.If determined there, storage cell compartment 2 has refrigeration again Demand, then capillary 21 is arrived in switching (S13) in compressor operation.Otherwise step S11, S12 are repeated for a long time in this way, until Storage cell compartment 3, which is cooled to, closes threshold value T3_aus, compressor is closed (S14) again, and the method is after the waiting time It repeats.

Fig. 4 shows a configuration of T-piece 23.T-piece 23 is formed by short pipeline section, and there are two in waist 30 for pipeline section tool Not ipsilateral different diameter section 28,29.By the end of the refrigerant pipe 31 of evaporator 7 with small tolerance merging and It is welded in the relatively narrow section 28 of the two sections.The end of capillary 21,22 is placed to another with big gap In section 29, then by section 29 around capillary 21,22 flatten, thus make the wall region of section 29 capillary 21,22 it Between contact, and the gap between wall region and capillary 21,22 is sealed shut by solder.Because refrigerant is passing through hair It expands after tubule 21 or 22, so T-piece 23 is cold and is therefore arranged on the inside of insulation material layer 33, is evaporating The T-piece also is disposed on inside internal container 32 in the case where device 7 is arranged in 32 inside of internal container.

Alternatively, the end of refrigerant pipe 31 itself can extend, so as to constitute the end for receiving capillary 21,22 Section 29.

Fig. 5 shows the corner part for the evaporator 7 that the construction in upstream is inflation type evaporator.Capillary 21,22 is aspirating The intra-segment in upstream of the slave evaporator 7s of pipe 25 is guided, to constitute internal heat exchanger 27.In evaporator Molding refrigerant line 34 originates at the input site 35 and terminates at outlet 36 on 7, suction tube 25 in upstream End is inserted into the outlet.Between input site 35 and outlet 36, the plate of evaporator is formed against capillary 21,22.It is defeated Enter position 35 and constitute T-piece at the same time, the end in downstream of the branch 19,20 in parallel of two of refrigerant-cycle systems is again Converge at the T-piece.

The difference of the refrigerant-cycle systems of the refrigerant-cycle systems and Fig. 2 of Fig. 6 is that reversal valve 18 passes through branch point 37 substitutions and the arrangement shut-off valve 38,39 on each branch line from the branch line 19,20 of branch point 37s.When this When two shut-off valves 38,39 are closed and compressor 10 is shut down, then shut-off valve 38,39 and compressor 10 prevent one side evaporator Pressure balance between 6,7 and another aspect condenser 11.As in the case where Fig. 2, when only shut-off valve 39 is opened, The through-flow of then capillary 22 is sufficiently used for supplying liquid refrigerant to evaporator 7, however be for evaporator 6 it is inadequate, instead It, when opening shut-off valve 38, then refrigerant flows through capillary 21 and is sufficiently used for mostly supplying liquid system to evaporator 6 Cryogen.The case where if the two shut-off valves 38,39 are opened, then can be evaporated under normal operating conditions with evaporator 6,7 phase Capillary 21,22 in parallel is flowed through than more liquid refrigerants.When system after power grid power failure, typically at user When two 13,14 displays temperatures of temperature sensor are close to environment temperature when cryogen is run for the first time, or ought typically will in user After the food of a large amount of temperature is packed into a storage cell compartment in the storage cell compartment 2,3, which is pressed accordingly by manipulation When key, then the operational mode for opening the two shut-off valves 38,39 can be selected by control unit 12.

Reference signs list

1 shell

2 storage cell compartments

3 storage cell compartments

4

5 foreboards

6 evaporators

7 evaporators

8 partition walls

9 ventilation blowers

10 compressors

11 machine chamber grooves

12 control units

13 temperature sensors

14 temperature sensors

15 condensers

16 pressure interfaces

17 refrigerant pipes

18 reversal valves

19 branch lines

20 branch lines

21 capillaries

22 capillaries

23 T-pieces

24 connecting tubes

25 suction tubes

26 pumping surfaces

27 heat exchangers

28 sections

29 sections

30 waists

31 refrigerant pipes

32 internal containers

33 insulation material layers

34 refrigerant lines

35 input sites

36 outlets

37 branch points

38 shut-off valves

39 shut-off valves.

Claims

1. a kind of refrigerating appliance, particularly Domestic refrigerator include the first storage cell compartment and the second storage cell compartment (3,2), Wherein at least described second storage cell compartment (2) has the temperature sensor (13) for detecting refrigeration demand；Refrigerant circulation system System, by the arrangement of the first capillary and the second capillary (21,22) composition, for cooling down in the refrigerant-cycle systems The evaporator (7) in upstream for stating the first storage cell compartment (3) and the steaming in downstream for cooling down second storage cell compartment (2) Hair device (6) is connected in series；Valve (18) can be blocked by the valve via at least one of described capillary (21,22) The refrigerant stream of capillary；With control unit (12), which is characterized in that first storage cell compartment (3) also has for detecting The temperature sensor (14) of refrigeration demand, and described control unit (12) setting detects refrigeration demand for basis wherein Storage cell compartment (2,3) select the positions of the valve (18).

2. refrigerating appliance according to claim 1, which is characterized in that the arrangement of the capillary (21,22) is cloth in parallel It sets.

3. refrigerating appliance according to claim 1 or 2, which is characterized in that the valve (18) is reversal valve, and the valve is First capillary (21) is blocked in one position and blocks second capillary (22) in the second position.

4. refrigerating appliance according to claim 1 or 2, which is characterized in that the valve includes at least one first shut-off valve, First shut-off valve is connect in a manner of arranged in series with first capillary, and the arranged in series and described second mao Tubule is connected in parallel.

5. refrigerating appliance according to claim 4, which is characterized in that the valve include the second shut-off valve, described second section Only valve is connect in a manner of arranged in series with second capillary.

6. refrigerating appliance according to claim 5, which is characterized in that the two shut-off valves are beaten in rapid cooling mode It opens.

7. refrigerating appliance according to any one of the preceding claims, which is characterized in that second storage cell compartment (2) Running temperature (T2) is higher than the running temperature (T3) of first storage cell compartment (3).

8. refrigerating appliance according to any one of the preceding claims, which is characterized in that the pipe (24) of single type is from described The entrance of the evaporator (6) in downstream is extended in the outlet of the evaporator (7) of upstream.

9. refrigerating appliance according to any one of the preceding claims, which is characterized in that first storage cell compartment (3) Volume is at least the half of the volume of second storage cell compartment (2).

10. refrigerating appliance according to any one of the preceding claims, which is characterized in that the capillary (21,22) Flow resistance is chosen so as to realize the difference at least 20% of second evaporator (6), excellent according to the position of the valve (18) The degree of filling of choosing at least 50%.

11. refrigerating appliance according to any one of claim 1 to 10, which is characterized in that the first evaporator (7) tool There is at least one input site (35), the capillary (21,22) is led in the input site.

12. refrigerating appliance according to any one of claim 1 to 10, which is characterized in that the capillary (21,22) Converge at T-piece in the end in downstream, the T-piece (23) is arranged in the heat-barrier material for surrounding the storage cell compartment (2,3) On the inside of layer (33).

13. refrigerating appliance according to any one of the preceding claims, which is characterized in that the capillary (21,22) with The heat exchanger (27) inside suction tube (25) composition of compressor (10) is extended to from second evaporator (6).

14. a kind of method for running refrigerating appliance, the refrigerating appliance has the first storage cell compartment and the second storage cell compartment (3,2) and refrigerant-cycle systems, by the first capillary and the second capillary (21,22) structure in the refrigerant-cycle systems At arrangement, the evaporator (7) in upstream for cooling down first storage cell compartment (3) and for cooling down second storage The evaporator (6) in downstream of cell compartment (2) is connected in series, and can be realized height by first capillary and the second capillary Flow resistance and low flow resistance, the method have following step:

A) detection (S1, S2, S5, S12) whether there is refrigeration demand in one of described storage cell compartment (2,3),

B) when the storage cell compartment there are refrigeration demand is the first storage cell compartment (3), then make refrigerant in the arrangement (S8, S9) is recycled under high flow resistance；With

C) when the storage cell compartment there are refrigeration demand is the second storage cell compartment (2), then make refrigerant in the arrangement (S2, S3) is recycled under low flow resistance.