Refrigeration equipment

Abstract

The invention relates to a refrigeration device, in particular a household refrigeration device, comprising: at least one storage compartment for accommodating objects to be cooled; and a refrigerant circuit having a condenser, an evaporator thermally coupled to the storage compartment for cooling the storage compartment, the evaporator being connected to the condenser via a throttling section. The throttling section is provided with a capillary tube connected with the evaporator; the pre-throttling part is connected with the condenser; the pre-throttling part comprises at least two pre-throttling pipes with different flow resistances; and a first switching valve arranged between the pre-throttle portion and the capillary tube, the first switching valve being configured to selectively connect one of the pre-throttle tubes with the capillary tube.

Description

Technical Field

[0001] The present invention relates to a refrigeration device, in particular to a household refrigeration device, such as a refrigerator, a freezer or a refrigerator-freezer combination device. Background Art

[0002] In refrigeration appliances, in particular in domestic refrigeration appliances, such as refrigerators, freezers or refrigerator-freezer combinations, a refrigeration circuit is provided, which usually has a refrigerant compressor, a condenser, a throttling section, an evaporator and a return line. The throttling section is usually implemented as a capillary tube, which is connected to the inlet of the evaporator. In order to prevent the refrigerant from flowing into the evaporator when the compressor is switched off, a valve is usually provided, which is arranged between the inlet of the capillary tube and a connecting pipe, which is connected to the condenser outlet.

[0003] In order to improve the efficiency of a refrigeration system, it is known to implement different flows of the refrigerant through the evaporator.

[0004] For example, DE 10 2011 079 206 A1 describes a refrigeration device in which a condenser and an evaporator of a refrigerant circuit are connected via a first and a second refrigerant channel. A valve can selectively allow the refrigerant to flow through the first or second refrigerant channel. The two refrigerant channels have different flow resistances, so that the heat transfer to the refrigerant can be influenced by selecting the corresponding refrigerant channel.

[0005] DE 10 2015 221 441 A1 discloses a refrigeration device with a refrigerant circuit, in which a plurality of capillary tube groups are arranged in sequence or connected in series between a condenser and an evaporator. Each capillary tube group comprises a plurality of capillaries connected in parallel to each other. A plurality of valves are also provided, which are configured to connect a capillary tube of one of the capillary tube groups with a capillary tube of each of the other capillary tube groups in terms of fluid technology to obtain a plurality of flow paths in a throttling element to control the temperature reduction of the refrigerant passing through the throttling element. The valves belonging to a capillary tube group are respectively located upstream of the capillaries of the corresponding capillary tube group.

[0006] DE 10 2020 212 203 A1 also describes a refrigeration device having a refrigerant circuit, the refrigerant circuit comprising a condenser, an evaporator connected to the condenser, a drier arranged between the condenser and the evaporator, and a valve device connected to the drier via an intermediate capillary tube and to the evaporator via a throttling capillary tube. The intermediate capillary tube pre-throttles the refrigerant, so that the length of the throttling capillary tube can be shortened. Summary of the invention

[0007] One of the objects of the present invention is to provide an improved solution for realizing different refrigerant flows through an evaporator of a refrigerant circuit of a refrigeration system.

[0008] This object is achieved according to the invention by a refrigeration appliance having the features of claim 1 .

[0009] According to the invention, a refrigeration device (in particular a household refrigeration device, such as a refrigerator, a freezer or a refrigerator-freezer combination) comprises at least one storage compartment for accommodating refrigerated goods and a refrigerant circuit, the refrigerant circuit having a condenser, an evaporator thermally coupled to the storage compartment for cooling the storage compartment, wherein the evaporator is connected to the condenser via a throttling section. The throttling section has a capillary tube connected to the evaporator, a pre-throttling section connected to the condenser, and a first switching valve arranged between the pre-throttling section and the capillary tube, the pre-throttling section comprising at least two pre-throttling tubes with different flow resistances, the first switching valve being configured to selectively connect one of the pre-throttling tubes to the capillary tube.

[0010] The basic idea of ​​the invention is to pre-throttle the refrigerant by means of two or more parallel pre-throttle tubes before the switching valve and, depending on the desired refrigerant flow into the evaporator, to allow flow through only one of these pre-throttle tubes by means of the switching valve. The parallel pre-throttle tubes of the pre-throttle section are each connected to the switching valve, and all of these parallel pre-throttle tubes have different flow resistances. According to the invention, the pre-throttle tube is arranged upstream of the switching valve with respect to the flow direction from the condenser to the evaporator.

[0011] By means of the pre-throttling in the respective pre-throttling tube, the length of the capillary tube connected to the inlet of the evaporator can be reduced. In particular, two parallel capillary tubes connected to the same evaporator can be omitted in order to achieve different refrigerant flows through the evaporator. Thus, a significant material saving can be achieved. By arranging the first switching valve between the pre-throttling section and the capillary tube, the first switching valve can essentially control the refrigerant flow individually, which means additional material saving, in particular for all evaporators. However, this does not exclude the provision of additional valves, for example in order to block the refrigerant flow through one or (if provided) a plurality of evaporators.

[0012] Advantageous embodiments and developments emerge from the dependent claims which refer back to the independent claim in conjunction with the description.

[0013] According to some embodiments, it may be provided that the switching valve is a solenoid valve or a rotary valve.

[0014] According to some embodiments, it can be provided that the first switching valve is the first valve arranged in the flow path between the condenser and the respective evaporator with reference to the flow direction from the condenser to the respective evaporator. In other words, upstream of the switching valve, preferably no further valve is arranged between the condenser and the switching valve. As a result, the hydraulic connection of the refrigerant circuit is further simplified.

[0015] According to some embodiments, it may be provided that a dryer is arranged between the condenser and the prethrottle.

[0016] According to some embodiments, it can be provided that the pre-throttle tubes have different lengths and / or different inner diameters in order to achieve different flow resistances. For example, at least one of the pre-throttle tubes can be implemented as a capillary tube.

[0017] According to some embodiments, it can be provided that the pre-throttle tube has a length in the range between 0.2 m and 1.5 m.

[0018] According to some embodiments, it can be provided that the flow resistance of the pre-throttle tube and the flow resistance of the capillary tube are dimensioned so that a portion of the throttling effect to be achieved up to the evaporator inlet is achieved via the corresponding pre-throttle tube, for example approximately in the range between 10% and 70% of the pressure difference to be achieved.

[0019] According to some embodiments, it can be provided that the pre-throttle tube has an inner diameter in the range between 0.4 mm and 0.8 mm.

[0020] According to some embodiments, it can be provided that the throttling section has at most one capillary tube for each evaporator. That is, the inlet of the evaporator is connected to only one capillary tube, instead of two capillary tubes connected in parallel. In a single-circuit refrigerant circuit with a plurality of evaporators connected in series, only one of the plurality of evaporators is connected to one capillary tube. In a multi-circuit refrigerant circuit with a plurality of evaporators connected in parallel, each evaporator is connected to exactly one capillary tube. This advantageously further reduces the material consumption.

[0021] According to some embodiments, it can be provided that the refrigeration device has a first storage compartment and a second storage compartment, wherein the refrigerant circuit has a first evaporator thermally coupled to the first storage compartment and a second evaporator thermally coupled to the second storage compartment, wherein the throttling section has a first capillary tube connected to the first evaporator or the second evaporator.

[0022] According to some embodiments, it can be provided that the first evaporator and the second evaporator are connected in series, wherein the first evaporator and the second evaporator are connected to the first switching valve only via the first capillary tube. Thus, a single-circuit refrigerant circuit is realized. In this case, it is advantageously possible to adjust different refrigerant flows through the evaporators in a simple manner by switching only one capillary tube and two pre-throttle tubes through the switching valve.

[0023] According to some embodiments, it can be provided that the first capillary tube (41) is connected to the first evaporator, and the throttling section has a second capillary tube connected to the second evaporator and a second switching valve connected in series with the first switching valve, the first capillary tube and the second capillary tube are connected to the second switching valve, wherein the second switching valve is configured to control the refrigerant flow through the first capillary tube and the second capillary tube. Thus, a multi-circuit refrigerant circuit is realized. The second switching valve can be, for example, a solenoid valve or a rotary valve. In general, another switching valve can be configured to connect the first capillary tube and / or the second capillary tube to a pre-throttling section (or switching valve). Therefore, the second switching valve can be switched so that the first evaporator and / or the second evaporator are supplied with refrigerant, while the first switching valve selectively allows the refrigerant to flow through only one of the pre-throttling tubes. Therefore, the refrigerant flow through multiple evaporators can be controlled by means of two valves and thus very material-saving and in a simple manner.

[0024] According to some embodiments, it can be provided that the first switching valve and the second switching valve are connected via a further pre-throttle tube. In this way, the throttling effect of the pre-throttle section can be further increased, which further reduces the material consumption for the capillary tubes that usually have to be laid relatively expensively. These pre-throttle tubes can be laid, for example, in the machine room of the refrigeration system, which simplifies installation.

[0025] According to some embodiments, it can be provided that the outlet of the first evaporator is connected to the inlet of the second evaporator via a connecting pipe, wherein the second capillary tube leads into the connecting pipe. Since only one capillary tube is provided for each evaporator, only one capillary tube (here the second capillary tube) needs to be introduced into the connecting pipe. This further simplifies the installation of the refrigerant circuit.

[0026] According to some embodiments, one of the first storage compartment and the second storage compartment is a refrigerator compartment, and the other is a freezer compartment. For example, the refrigerant circuit can be configured so that the temperature in the refrigerator compartment can be adjusted within a range of -1°C to 15°C, and the temperature in the freezer compartment can be adjusted within a range of -30°C to 0°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described below with reference to the accompanying drawings, wherein:

[0028] Figure 1A schematic diagram showing a connection block diagram of a refrigeration device according to an embodiment of the present invention; and

[0029] Figure 2 A schematic diagram showing a connection block diagram of a refrigeration device according to another embodiment of the present invention;

[0030] Figure 3 A schematic diagram showing a connection block diagram of a refrigeration device according to another embodiment of the present invention is shown.

[0031] In the figures, identical reference signs denote identical or functionally identical components, unless otherwise indicated. DETAILED DESCRIPTION

[0032] Figure 1 The block diagram of the connection of the refrigeration device 100 is shown as an example. The refrigeration device 100 may be a household refrigeration device, for example a refrigerator, a freezer or an ice chest or a refrigerator-freezer combination.

[0033] exist Figure 1 The refrigeration device 100 shown by way of example in the figure comprises a first storage compartment 1, a second storage compartment 2 and a refrigerant circuit 3, which is configured to absorb heat from these storage compartments 1, 2 and release the heat to the environment. In principle, it is also conceivable that the refrigeration device 100 has only one storage compartment or has more than two storage compartments. Therefore, in general, the refrigeration device 1 comprises at least one storage compartment.

[0034] The first storage compartment 1 may be, for example, a refrigerator compartment. In this case, the refrigerant circuit 3 may be configured to cool the refrigerator compartment to a temperature in the range of -1°C to 15°C. The second storage compartment 2 may be, for example, a freezer compartment, wherein the refrigerant circuit 3 may be configured to cool the freezer compartment to a temperature in the range of -30°C to 0°C. Of course, these storage compartments 1 and 2 may also both be refrigerator compartments or freezer compartments. Generally speaking, these storage compartments 1 and 2 are spatially separated containers or spatially different zones within a container, from which heat can be absorbed by the evaporators 34 and 35. Therefore, these storage compartments 1 and 2 can be cooled to the same or different temperatures.

[0035] like Figure 1 As shown by way of example, the refrigerant circuit 3 has a compressor 31 , a condenser 32 , an optional dryer 33 , a throttle section 4 and at least one evaporator 34 , 35 .

[0036] The compressor 31 is configured to circulate a refrigerant (eg, R600a) in the refrigeration circuit 3. Figure 1, the outlet or pressure side 33B of the compressor 31 is connected to the inlet 32A of the condenser 32. The condenser 32 is realized as a heat exchanger, for example, as a finned heat exchanger or a so-called "tube-on-sheet heat exchanger", abbreviated as "ToS heat exchanger", and is configured to condense the gaseous refrigerant by exchanging heat with the environment.

[0037] like Figure 1 As further schematically shown, an inlet 33A of an optional dryer 33 is connected to an outlet 32B of the condenser 32. The dryer 33 is configured to extract moisture from the refrigerant. Figure 1 As shown by way of example, an optional drain pipe 6 can be connected to the outlet 33B of the dryer 33. Before filling with refrigerant, the refrigerant circuit 3 can be drained through the drain pipe 6. Instead of the drain pipe 6, another intermediate piece (e.g., a pipe) can also be connected to the outlet 33B of the dryer 33.

[0038] exist Figure 1 , a refrigerant circuit 3 having a first evaporator 34 and a second evaporator 35 is shown by way of example, wherein the first evaporator 34 is thermally coupled to the first storage compartment 1, and the second evaporator 35 is thermally coupled to the second storage compartment 2. Of course, only one evaporator may be provided to cool the two storage compartments 1, 2, or one storage compartment may be cooled by a plurality of evaporators 34, 35. In general, at least one evaporator is provided. The at least one evaporator 34, 35 may be implemented, for example, as a compact heat exchanger, for example as an MCHE heat exchanger. However, the present invention is not limited thereto.

[0039] Figure 1 As shown by way of example, the outlet 35B of the second evaporator 35 is connected to the inlet 34A of the first evaporator 34 via a connecting pipe 38. The outlet 34B of the first evaporator 34 is connected to the inlet 32A of the compressor 31, in particular via a suction pipe 36.

[0040] like Figure 1 As shown, the throttling section 4 has a capillary tube 41, a pre-throttling section 43 and a first switching valve 44, and the throttling section 4 connects the condenser 32 with at least one evaporator 34, 35. Figure 1In the example shown in FIG. 4 , the throttling section 4 connects the condenser 32 to the inlet 35A of the second evaporator 35A. Thus, the gaseous refrigerant is compressed by the compressor 31, glides in the condenser 32, at least partially condenses in the condenser 32 by releasing heat to the environment, dries in the optional dryer 33, and expands in the throttling section 4. The refrigerant then enters the second evaporator 35, where it evaporates by absorbing heat from the second storage compartment 2, and further enters the first evaporator 34, where it evaporates by absorbing heat from the first storage compartment 1. The compressor 31 draws the gaseous refrigerant from the first evaporator 34 via the suction pipe 36.

[0041] like Figure 1 As schematically shown in FIG. 1 , the pre-throttling section 43 has at least two pre-throttling pipes 43A and 43B. The pre-throttling pipes 43A and 43B are respectively connected to the first switching valve 44 and the outlet 32B of the condenser 32, for example, through the optional dryer 33. Figure 1 As shown, the pre-throttle tubes 43A and 43B are connected in parallel with each other. The pre-throttle tubes 43A and 43B have different flow resistances. The pre-throttle tubes 43A and 43B may have different lengths and / or different inner diameters to achieve different flow resistances. For example, the pre-throttle tubes 43A and 43B may have a length in the range of 0.2 m to 1.5 m. The inner diameter of the pre-throttle tubes 43A and 43B may be, for example, in the range of 0.4 mm to 0.8 mm.

[0042] The first switching valve 44 can be configured as a solenoid valve or a rotary valve, for example. The switching valve 44 can particularly have a plurality of inlets and an outlet corresponding to the number of the pre-throttle tubes 43A, 43B. Each pre-throttle tube 43A, 43B is respectively connected to an inlet of the switching valve 44. Generally speaking, the switching valve 44 is configured to connect the outlet to each inlet in a fluid-conducting manner.

[0043] like Figure 1 As shown exemplarily, the capillary tube 41 connects the first switching valve 44 to the inlet 35A of the second evaporator 35. Therefore, the capillary tube 41 is connected to at least one evaporator 34, 35, and the switching valve 44 is arranged between the pre-throttling section 43 and the capillary tube 41. Figure 1 As further schematically shown, the capillary tube 41 can extend at least partially in thermally conductive contact with the suction tube 36 , for example be connected to the suction tube 36 , so that a suction throttle heat exchanger 37 is formed.

[0044] Depending on the switching position, the first switching valve 44 connects one of these pre-throttle tubes 43A, 43B to the capillary tube 41. Therefore, the refrigerant is already expanded in the respective pre-throttle tube 43A, 43B before reaching the valve 44. The remaining necessary pressure drop occurs in the capillary tube 41. The flow resistance of the pre-throttle tubes 43A, 43B and the flow resistance of the capillary tube 41 can be designed in particular so that a part of the throttling effect to be achieved up to the inlet 34A, 35A of the evaporator 34, 35 is achieved through the respective pre-throttle tube 43A, 43B.

[0045] By means of the different flow resistances of the prethrottle tubes 43A, 43B, different throttling effects of the prethrottle 43 and thus different refrigerant flows can be adjusted by means of the switching valve 44. In particular, the capillary tube 41 can be shortened in this way and material can be saved.

[0046] like Figure 1 As can be seen in FIG. 1 , the first switching valve 44 can be connected along the condenser 32 and the corresponding evaporator (in Figure 1 The flow path between the first switching valve 44 and the second evaporator 35 in the figure is the first valve arranged in the flow path with reference to the flow direction from the condenser 32 to the corresponding evaporator 34, 35. That is, no other valve is arranged upstream of the first switching valve 44, and the first switching valve 44 is arranged directly downstream of the pre-throttling pipes 43A, 43B.

[0047] exist Figure 1 exemplarily shows a single-circuit refrigerant circuit 3, in which a plurality of evaporators 34, 35 are connected in series and only one of the plurality of evaporators 34, 35 is connected to the throttling section 4. Figure 1 As shown, in this case, the throttling section 4 preferably has only one capillary tube 41, which is connected to one of the plurality of series-connected evaporators 34, 35. The invention is not limited to a single-circuit refrigerant circuit 3.

[0048] Figure 2 and Figure 3 In each case, a refrigeration device 100 having a dual-circuit refrigerant circuit 3 is shown by way of example.

[0049] exist Figure 2 The refrigeration device 100 shown in the example Figure 1 The difference between the refrigeration device 100 in the embodiment is that the throttling section 4 has a second capillary tube 42 and a second switching valve 45 in addition to the first capillary tube 41. Figure 2 In the embodiment, not the outlet 34B of the first evaporator 34 but the outlet 35B of the second evaporator 35 is connected to the inlet 31A of the compressor 31 through the suction pipe 36 .

[0050] like Figure 2As shown by way of example, the first and second switching valves 44 and 45 are connected in series. The second switching valves 44 and 45 can be configured as solenoid valves or rotary valves. Generally speaking, the second switching valve 45 has an inlet connected to the outlet of the first switching valve 44, and has at least two outlets, each of which is connected to a capillary 41 and 42. The second switching valve 45 can be configured to connect the inlet to one or more outlets. Figure 2 As shown, the second switching valve 45 is arranged downstream of the first switching valve 44 , with reference to the flow direction from the condenser 32 to the evaporators 34 , 35 .

[0051] like Figure 2 As shown by way of example, the first capillary tube 41 may be connected to the inlet 34A of the first evaporator 34 and the second switching valve 45, in particular, to one of the outlets of the second switching valve 45. The second capillary tube 42 may be connected to the inlet 35A of the second evaporator 35 and the second switching valve 45, in particular, to the other outlet of the second switching valve 45. Figure 2 In the embodiment, the outlet 34B of the first evaporator 34 is connected to the inlet 35A of the second evaporator 35 via the connecting pipe 38. Here, the second capillary tube 42 can be optionally led into the connecting pipe 38 and thus connected to the inlet 35A of the second evaporator 35.

[0052] like Figure 2 As further schematically shown, at least one of the capillaries 41, 42 can extend at least partially in thermally conductive contact with the suction tube 36, for example, be connected to the suction tube 36, thereby forming a suction throttle heat exchanger 37. Figure 2 In the example shown, only the second capillary tube 42 extends in thermally conductive contact with the suction tube 36. Alternatively, only the first capillary tube 41 or the first and second capillary tubes 41, 42 may extend in thermally conductive contact with the suction tube 36.

[0053] exist Figure 2 In the refrigerant circuit 3 shown in FIG. 1 , different refrigerant flows can be generated in one or more evaporators 34 and 35 according to the switching position of the first switching valve 44, which is related to the switching position of the second switching valve 44 and 45. Figure 2 As can be seen, in particular, only one capillary tube 41, 42 can be provided for each evaporator 34, 35, wherein even in this case, different flow rates can be achieved due to a plurality of pre-throttle tubes 43A, 43B and switching valves 44, 45 with different flow resistances. In general, the throttling section 4 can have a maximum of one capillary tube 41, 42 for each evaporator 34, 35.

[0054] exist Figure 3 The refrigeration device 100 shown is Figure 2The refrigeration device 100 shown is different only in that the first and second switching valves 44, 45 are connected via another pre-throttle pipe 43C. The other pre-throttle pipe 43C can have a different flow resistance than the above-mentioned parallel pre-throttle pipe and accordingly contribute to a part of the required pressure drop in the refrigerant.

[0055] Although the invention has been described above by way of example by means of embodiments, the invention is not restricted thereto but can be modified in many ways. In particular, combinations of the aforementioned embodiments are also conceivable.

[0056] Reference numerals

[0057] 1 First Storage Slot

[0058] 2 Second storage compartment

[0059] 3 Refrigerant circuit

[0060] 4 Throttling section

[0061] 6 Drain pipe

[0062] 31 Compressor

[0063] 31A Compressor inlet

[0064] 31B compressor outlet

[0065] 32 Condenser

[0066] 32A Condenser inlet

[0067] 32B Condenser outlet

[0068] 33 Dryer

[0069] 33A Dryer inlet

[0070] 33B Dryer outlet

[0071] 34. First evaporator

[0072] 34A Inlet of the first evaporator

[0073] 34B Outlet of the first evaporator

[0074] 35 Second evaporator

[0075] 35A Inlet of the second evaporator

[0076] 35B Outlet of the second evaporator

[0077] 36 Suction tube

[0078] 37 Suction throttle tube heat exchanger

[0079] 41 First capillary

[0080] 42 Second capillary

[0081] 43 Pre-throttling section

[0082] 43A, 43B Parallel pre-throttle tubes

[0083] 43C Another pre-throttle pipe

[0084] 44 First switching valve

[0085] 45 Second switching valve

[0086] 100 Refrigeration equipment

Claims

1. A refrigeration device (100), in particular a household refrigeration device, comprising: At least one storage compartment (1, 2) for accommodating items to be cooled; and A refrigerant circuit (3), the refrigerant circuit comprising a condenser (32), and an evaporator (34, 35) thermally coupled to the storage compartment (1) for cooling the storage compartments (1, 2), the evaporator being connected to the condenser (32) via a throttling section (4); It is characterized in that The throttling section (4) has: Capillaries (41, 42) connected to the evaporators (34, 35); a pre-throttling section (43) connected to the condenser (32), the pre-throttling section comprising at least two pre-throttling tubes (43A, 43B) having different flow resistances; and A first switching valve (44) is arranged between the pre-throttle portion (43) and the capillary tubes (41, 42), and is configured to selectively connect one of the pre-throttle tubes (43A, 43B) to the capillary tubes (41, 42).

2. The refrigeration device (100) according to claim 1, in, The first switching valve (44) is the first valve arranged in the flow path between the condenser (32) and the corresponding evaporator (34, 35) with reference to the flow direction from the condenser (32) to the corresponding evaporator (34, 35).

3. The refrigeration device (100) according to claim 1 or 2, in, A dryer (33) is arranged between the condenser (32) and the pre-throttle section (43).

4. The refrigeration device (100) according to any one of the preceding claims, in, The pre-throttling tubes (43A, 43B) have different lengths and / or different inner diameters to achieve different flow resistances.

5. The refrigeration device (100) according to one of the preceding claims, in, The pre-throttling tubes (43A, 43B) have a length ranging between 0.2 m and 1.5 m.

6. The refrigeration device (100) according to one of the preceding claims, in, The pre-throttle tubes (43A, 43B) have an inner diameter ranging between 0.4 mm and 0.8 mm.

7. The refrigeration device (100) according to one of the preceding claims, in, The flow resistance of the pre-throttling tube (43A, 43B) and the flow resistance of the capillary tube (41, 42) are designed so that a part of the throttling effect to be achieved up to the inlet (34A, 35A) of the evaporator (34, 35) is realized through the corresponding pre-throttling tube (43A, 43B).

8. The refrigeration device (100) according to one of the preceding claims, in, The throttling section (4) has at most one capillary tube (41, 42) per evaporator (34).

9. The refrigeration device (100) according to one of the preceding claims, in, The refrigeration device (100) comprises a first storage compartment (1) and a second storage compartment (2). The refrigerant circuit (3) comprises a first evaporator (34) thermally coupled to the first storage compartment (1) and a second evaporator (35) thermally coupled to the second storage compartment (2). The throttling section (4) has a first capillary tube (41), which is connected to the first evaporator or the second evaporator (34, 35).

10. The refrigeration device (100) according to claim 9, in, The first evaporator and the second evaporator (34, 35) are connected in series, and The first evaporator and the second evaporator (34, 35) are connected to the first switching valve (44) only through the first capillary tube (41).

11. The refrigeration device (100) according to claim 9, in, The first capillary tube (41) is connected to the first evaporator (34). The throttling section (4) comprises a second capillary tube (42) connected to the second evaporator (35) and a second switching valve (45) connected in series with the first switching valve (44); the first capillary tube and the second capillary tube (41, 42) are connected to the second switching valve. The second switching valve (45) is configured to control the refrigerant flow through the first capillary tube and the second capillary tube (41, 42).

12. The refrigeration device (100) according to claim 11, in, The first switching valve and the second switching valve (44, 45) are connected via another pre-throttle pipe (43C).

13. The refrigeration device (100) according to claim 11 or 12, in, The outlet (34B) of the first evaporator (34) is connected to the inlet (35A) of the second evaporator (35) via a connecting pipe (38), and Wherein, the second capillary tube (42) leads into the connecting tube (38).

14. The refrigeration device (100) according to any one of claims 9 to 13, in, One of the first storage compartment (1) and the second storage compartment (2) is a refrigerating compartment, and the other is a freezing compartment.

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