Refrigerator

Abstract

The embodiment of the utility model belongs to the technical field of household appliances, and provides a refrigerator which realizes connection of a gas-liquid separator and a micro-channel heat exchanger through a flat pipe joint so as to realize gas-liquid separation. And during mounting, the first end of the first pipeline of the micro-channel heat exchanger is inserted and welded to the other end of the first flat pipe joint, so that gas-liquid separation can be performed on a refrigerant entering the micro-channel heat exchanger through the first gas-liquid separator, the dryness of the refrigerant can be adjusted, and the heat exchange efficiency of the micro-channel heat exchanger is improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of household appliances. In particular, it relates to a refrigerator. Background Art

[0002] In the refrigeration system of a refrigerator, an evaporator, a condenser, a compressor, and a throttle valve are four essential components in the refrigeration system. The compressor sucks in the refrigerant at a lower pressure discharged from the evaporator, raises its pressure, and then sends it into the condenser. In the condenser, it condenses into a liquid with a higher pressure. After throttling through the throttle valve, a two-phase mixture composed of gas and liquid is formed and sent into the evaporator. In the evaporator, it absorbs heat and evaporates into a vapor with a lower pressure, and then enters the compressor, thus completing the refrigeration cycle. Among them, the heat exchange efficiency of the condenser and the evaporator is affected by the dryness of the refrigerant. For example, if the dryness of the refrigerant in the evaporator is lower, it means that there is less gaseous refrigerant and more liquid refrigerant, and then the heat exchange efficiency is higher.

[0003] The microchannel heat exchanger has characteristics such as high-efficiency heat transfer and a compact structure design, thus saving space. Currently, the microchannel heat exchanger can be used as the evaporator or condenser of the refrigeration system of a refrigerator.

[0004] The existing gas-liquid separator is generally arranged on the intake pipeline of the compressor. Affected by the current structure of the gas-liquid separator, it is impossible to adjust the dryness of the refrigerant in the microchannel heat exchanger through the gas-liquid separator to further improve the heat exchange efficiency. Summary of the Utility Model

[0005] Embodiments of the present application provide a refrigerator, which can adjust the dryness of the refrigerant in the microchannel heat exchanger through a gas-liquid separator to further improve the heat exchange efficiency.

[0006] In a first aspect, embodiments of the present application provide a refrigerator, including:

[0007] A cabinet, configured with a storage compartment;

[0008] A refrigeration system arranged in the cabinet, including a microchannel heat exchanger; the microchannel heat exchanger includes a first pipeline, a second pipeline, and a first gas-liquid separator arranged between the first pipeline and the second pipeline; the refrigeration system is configured to refrigerate the storage compartment;

[0009] Wherein, the first gas-liquid separator includes:

[0010] A first main body structure, configured with a first internal cavity; the first internal cavity is sequentially divided into a first gas collection cavity, a first gas-liquid separation chamber, and a first liquid collection cavity from top to bottom;

[0011] A first gas distribution pipe joint, arranged above the first main body structure and communicated with the first gas collection cavity;

[0012] The first liquid separation pipe joint is arranged below the first main structure and is communicated with the first liquid collection cavity; the first gas separation pipe joint or the first liquid separation pipe joint is communicated with the second pipeline;

[0013] The first flat pipe joint, one end of which is welded to the side wall of the first main structure and is communicated with the first gas-liquid separation chamber; the first end of the first pipeline is inserted into and welded to the other end of the first flat pipe joint.

[0014] In this embodiment, the connection between the gas-liquid separator and the microchannel heat exchanger is realized through the flat pipe joint to realize gas-liquid separation. And during installation, the first end of the first pipeline of the microchannel heat exchanger is inserted into and welded to the other end of the first flat pipe joint, so that the refrigerant entering the microchannel heat exchanger can be gas-liquid separated by the first gas-liquid separator, the dryness of the refrigerant can be adjusted, and further the heat exchange efficiency of the microchannel heat exchanger can be improved.

[0015] In some embodiments of the present application, the flow rate of the refrigerant flowing in the first end of the first pipeline is negatively correlated with the depth of the first end of the first pipeline inserted into the first flat pipe joint.

[0016] In this embodiment, the corresponding depth can be set according to the flow rate of the refrigerant in the microchannel flat pipe of the microchannel heat exchanger, which helps to form a fluid distribution conducive to gas-liquid separation.

[0017] In some embodiments of the present application, the depth is greater than or equal to 2 cm and less than or equal to 7 cm.

[0018] With such a setting, the gas-liquid separation efficiency can be further improved.

[0019] In some embodiments of the present application, the microchannel heat exchanger is an evaporator; the refrigeration system further includes a compressor, a condenser, a throttling device and a liquid storage tank;

[0020] Wherein, the exhaust port of the compressor is communicated with the condenser, and the condenser is communicated with the second end of the first pipeline through the throttling device; the first liquid separation pipe joint is communicated with the first end of the second pipeline, and the second end of the second pipeline is communicated with the intake port of the compressor through the liquid storage tank; the first gas separation pipe joint is communicated with the liquid storage tank.

[0021] With such a setting, gas-liquid separation can be realized in the evaporator, the heat exchange efficiency of the evaporator can be improved, and the liquid refrigerant flowing into the compressor after passing through the evaporator can be vaporized to prevent the compressor from suffering liquid slugging. In some embodiments of the present application, the ratio of the length of the first pipeline to the length of the second pipeline is within a first preset range.

[0022] With such an arrangement, the first gas-liquid separator can be disposed at the middle position of the evaporator, so as to separate the uncompletely evaporated liquid refrigerant earlier, reduce the proportion of the liquid refrigerant entering the latter half of the evaporator, and contribute to improving the heat exchange efficiency of the evaporator.

[0023] In some embodiments of the present application, the evaporator further includes a second gas-liquid separator; the second pipeline includes a first sub-pipeline and a second sub-pipeline, and the second gas-liquid separator is disposed between the first sub-pipeline and the second sub-pipeline;

[0024] Wherein, the second gas-liquid separator includes:

[0025] A second main structure, which is configured with a second internal cavity; the second internal cavity is sequentially divided into a second gas collecting cavity, a second gas-liquid separation chamber and a second liquid collecting cavity from top to bottom;

[0026] A second gas branch joint, which is disposed above the second main structure and is communicated with the second gas collecting cavity;

[0027] A second liquid branch joint, which is disposed below the second main structure and is communicated with the second liquid collecting cavity;

[0028] A third flat tube joint, one end of which is welded to the side wall of the second main structure and is communicated to the second gas-liquid separation chamber; the first end of the first sub-pipeline is inserted and welded to the other end of the third flat tube joint; one end of the second sub-pipeline is communicated with the second liquid branch joint, and the other end is communicated with the intake port of the compressor through the liquid storage tank; the second gas branch joint is communicated with the liquid storage tank.

[0029] With such an arrangement, that is, a second gas-liquid separator is disposed in the second pipeline of the evaporator close to the compressor. Through the synergistic effect of the two separators, a double guarantee can be formed, further reducing the risk of liquid refrigerant entering the compressor and improving the safety and reliability of the refrigeration system.

[0030] In some embodiments of the present application, the ratio of the length of the first pipeline to the length of the microchannel heat exchanger is within a second preset range, so that the first gas-liquid separator is disposed close to the compressor.

[0031] With such an arrangement, the first gas-liquid separator can be disposed at a position close to the compressor in the microchannel flat tube of the evaporator, which can ensure that the gas-liquid separation is carried out after the refrigerant flows through most of the area of the evaporator. At this time, the liquid component in the refrigerant is relatively small, and the separation effect is better. And it can reduce the pressure loss of the refrigerant in the pipeline and improve the heat exchange efficiency of the evaporator.

[0032] In some embodiments of the present application, the microchannel heat exchanger is a condenser; the refrigeration system further includes a compressor, an evaporator, a throttling device, and a liquid storage tank;

[0033] Wherein, the exhaust port of the compressor is communicated with the second end of the first pipeline; the first gas distribution pipe joint is communicated with the first end of the second pipeline; the first liquid distribution pipe joint, the throttling device, the evaporator, the liquid storage tank, and the intake port of the compressor are connected in sequence.

[0034] With such a setting, gas-liquid separation can be realized in the condenser, and the heat exchange efficiency of the condenser can be improved.

[0035] In some embodiments of the present application, it includes a third pipeline, a fourth pipeline, and a third gas-liquid separator disposed between the third pipeline and the fourth pipeline;

[0036] Wherein, the third gas-liquid separator includes:

[0037] A third main structure, which is constructed with a third internal cavity; the third internal cavity is sequentially divided into a third gas collection cavity, a third gas-liquid separation chamber, and a third liquid collection cavity from top to bottom;

[0038] A third gas distribution pipe joint, which is disposed above the third main structure and is communicated with the third gas collection cavity;

[0039] A third liquid distribution pipe joint, which is disposed below the third main structure and is communicated with the third liquid collection cavity;

[0040] A fifth flat pipe joint, one end of which is welded to the side wall of the third main structure and is communicated to the third gas-liquid separation chamber; the first end of the third pipeline is inserted into and welded to the other end of the fifth flat pipe joint; one end of the fourth pipeline is communicated with the third liquid distribution pipe joint, and the other end is communicated with the intake port of the compressor through the liquid storage tank; the third gas distribution pipe joint is communicated with the liquid storage tank.

[0041] With such a setting, that is, the evaporator uses a microchannel heat exchanger, and a third gas-liquid separator is arranged in the evaporator, so as to realize gas-liquid separation in the evaporator, improve the heat exchange efficiency of the evaporator, and vaporize the liquid refrigerant flowing into the compressor after passing through the evaporator, preventing the compressor from suffering liquid slugging.

[0042] In a second aspect, the present application provides a refrigerator, including:

[0043] A box body, which is constructed with a storage compartment;

[0044] A refrigeration system disposed within a box body includes a microchannel heat exchanger; a first gas-liquid separator is disposed between a first pipeline and a second pipeline of a porous flat tube of the microchannel heat exchanger; the refrigeration system is configured to refrigerate the storage chamber; the first gas-liquid separator includes: a first main body structure, a first gas distribution pipe joint disposed above the first main body structure, a first liquid separation pipe joint disposed below the first main body structure, a first gas-liquid separation chamber disposed within the first main body structure, and a first flat tube joint; the first gas distribution pipe joint or the first liquid separation pipe joint is communicated with the second pipeline;

[0045] Wherein, one end of the first flat tube joint is welded to a side wall of the first main body structure and communicated with the first gas-liquid separation chamber; a first end of the first pipeline is inserted and welded to the other end of the first flat tube joint according to a required insertion depth.

[0046] In this embodiment, the connection between the gas-liquid separator and the microchannel heat exchanger is realized through the flat tube joint to achieve gas-liquid separation. And since the depth of insertion of the microchannel flat tube of the microchannel heat exchanger into the flat tube joint of the gas-liquid separator affects the gas-liquid separation efficiency, during installation, the microchannel flat tube of the microchannel heat exchanger can be inserted and welded into the flat tube joint of the gas-liquid separator according to the required depth, which can improve the gas-liquid separation efficiency, thereby efficiently adjusting the dryness of the refrigerant and further improving the heat exchange efficiency of the microchannel heat exchanger. Description of the Drawings

[0047] In order to more clearly illustrate the embodiments of the present application or the implementation manners in related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0048] Figure 1 A schematic diagram of a refrigerator provided by an embodiment of the present application;

[0049] Figure 2 A schematic structural diagram of a refrigeration system 103 provided by an embodiment of the present application;

[0050] Figure 3 A schematic structural diagram of a refrigeration system 103 with an evaporator 33 as a microchannel heat exchanger provided by an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the refrigerant flow when the refrigeration system is in the refrigeration mode;

[0052] Figure 5 A schematic structural diagram of an evaporator 33 provided by an embodiment of the present application;

[0053] Figure 6 Schematic diagram of another refrigeration system 103 provided by an embodiment of the present application;

[0054] Figure 7 Schematic diagram of a refrigeration system 103 in which the condenser 32 provided by an embodiment of the present application is a microchannel heat exchanger;

[0055] Figure 8 Schematic diagram of a refrigeration system 103 in which both the condenser 32 and the evaporator 33 provided by an embodiment of the present application are microchannel heat exchangers;

[0056] Figure 9 Schematic diagram of the first gas-liquid separator 11 as an example;

[0057] Figure 10 Schematic diagram showing that the microchannel flat tubes of the evaporator 33 in the example of the present application are arranged around the side wall of the inner container 104.

[0058] Explanation of reference numerals:

[0059] 101 - Box body; 102 - Door body;

[0060] 103 - Refrigeration system; 104 - Inner container;

[0061] 105 - Liquid storage tank; 31 - Compressor;

[0062] 32 - Condenser; 33 - Evaporator;

[0063] 34 - Throttling device; 10 - First pipeline;

[0064] 12 - First flat tube joint; 13 - First gas distribution pipe joint;

[0065] 14 - First liquid distribution pipe joint; 111 - First main structure;

[0066] 113 - First gas-liquid separation chamber; 114 - First liquid collection chamber;

[0067] 15 - First connection assembly; 16 - First connecting pipe;

[0068] 17 - First circular joint; 18 - Second flat tube joint;

[0069] 19 - Second pipeline; 20 - First manifold;

[0070] 21 - Second manifold; a1 - First end of the first pipeline 10;

[0071] a2 - Second end of the first pipeline 10; b1 - First end of the second pipeline 19;

[0072] b2 - The second end of the second pipeline 19; 22 - The third connection component;

[0073] 23 - The fourth connection component; 11 - The first gas - liquid separator;

[0074] 27 - The second gas - liquid separator; 28 - The first sub - pipeline;

[0075] 29 - The second sub - pipeline; 30 - The third flat - tube joint;

[0076] 35 - The second gas - distribution pipe joint; 36 - The second liquid - distribution pipe joint;

[0077] 271 - The second main structure; 272 - The second gas - collecting cavity;

[0078] 273 - The second gas - liquid separation chamber; 274 - The second liquid - collecting cavity;

[0079] d1 - The first end of the second sub - pipeline 29; d2 - The second end of the second sub - pipeline 29;

[0080] 38 - The second connecting pipe; 39 - The second circular joint;

[0081] 40 - The fourth flat - tube joint; 331 - The third gas - liquid separator;

[0082] 332 - The third main structure; 333 - The third gas - collecting cavity;

[0083] 334 - The third gas - liquid separation chamber; 335 - The third liquid - collecting cavity;

[0084] 336 - The third gas - distribution pipe joint; 337 - The third liquid - distribution pipe joint;

[0085] 338 - The fifth flat - tube joint; 339 - The third pipeline;

[0086] 340 - The fourth pipeline; 341 - The fifth connection component. Detailed implementation manners

[0087] To make the purpose, implementation manners and advantages of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application with reference to the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0088] It should be noted that the brief description of the terms in this application is only for facilitating the understanding of the following described implementation manners, rather than intending to limit the implementation manners of this application. Unless otherwise specified, these terms should be understood according to their ordinary and common meanings.

[0089] In addition, the terms "comprise" and "include" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device that comprises a series of components does not have to be limited to those components clearly listed, but may include other components that are not clearly listed or are inherent to such products or devices.

[0090] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0091] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0092] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "mount", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0093] The compressor sucks in the refrigerant at a lower pressure discharged from the evaporator, raises its pressure to form a high-temperature and high-pressure refrigerant gas, and sends it into the condenser. In the condenser, it condenses into a liquid with a higher pressure. After throttling through the throttle valve, it forms a two-phase mixture composed of gas and liquid, and is sent into the evaporator. In the evaporator, it absorbs heat and evaporates into a vapor with a lower pressure, and then enters the compressor, thus completing the refrigeration cycle.

[0094] However, the heat exchange efficiency of the condenser and the evaporator is affected by the refrigerant dryness. For example, the lower the refrigerant dryness of the evaporator, the less gaseous refrigerant and the more liquid refrigerant, and then the higher the heat exchange efficiency. The higher the refrigerant dryness of the condenser, the more gaseous refrigerant and the less liquid refrigerant, and the higher the heat exchange efficiency.

[0095] For a microchannel heat exchanger with efficient heat transfer and a compact structure design that saves space, its heat transfer efficiency is also affected by the refrigerant dryness. However, when a two-phase mixture composed of gas and liquid enters the microchannel evaporator, due to the different densities of the gaseous refrigerant and the liquid refrigerant, the two-phase mixture is unevenly distributed in the multiple flat-tube microchannels of the microchannel evaporator, affecting the heat transfer efficiency of the microchannel heat exchanger.

[0096] Furthermore, a gas-liquid separator can be used in the microchannel evaporator to separate the gas-liquid mixture to improve the heat transfer efficiency. However, existing gas-liquid separators are generally arranged on the intake pipeline of the compressor. Affected by the current structure of the gas-liquid separator, it is impossible to adjust the refrigerant dryness in the microchannel heat exchanger through the gas-liquid separator to further improve the heat transfer efficiency.

[0097] Therefore, the present application provides a refrigerator, including a microchannel heat exchanger with a gas-liquid separator, and the connection between the gas-liquid separator and the microchannel heat exchanger is realized through a flat-tube joint to achieve gas-liquid separation. And since the depth of insertion of the microchannel flat tubes of the microchannel heat exchanger into the flat-tube joints of the gas-liquid separator affects the gas-liquid separation efficiency, during installation, the microchannel flat tubes of the microchannel heat exchanger can be inserted and welded into the flat-tube joints of the gas-liquid separator according to the required depth, which can improve the gas-liquid separation efficiency, thereby efficiently adjusting the refrigerant dryness and further improving the heat transfer efficiency of the microchannel heat exchanger.

[0098] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0099] First, the specific structure of a refrigerator provided by the embodiments of the present application will be described. Exemplarily, Figure 1 is a schematic diagram of a refrigerator provided by the embodiments of the present application. As Figure 1 shown, the refrigerator includes a box body 101, a door body 102, and a storage compartment provided in the box body 101.

[0100] In a possible implementation manner, the storage compartment includes a refrigerating compartment, a freezing compartment, etc., Figure 1 which are not shown in the figure.

[0101] It can be understood that Figure 1The figure shows a schematic diagram of a refrigerator applicable to this application only. It can also be a refrigerator with other structures, and this application does not limit it. Exemplarily, the refrigerator in the embodiment of this application can be a single-system refrigerator (multiple compartments share one evaporator), a dual-system refrigerator (the freezer and the refrigerator compartment use different evaporators respectively), or a triple-system refrigerator (the freezer, the refrigerator compartment, and the variable-temperature compartment use different evaporators respectively). Generally Figure 1 The exemplary refrigerator is a dual-system refrigerator.

[0102] In a possible implementation, the refrigerator further includes a refrigeration system 103 disposed in the cabinet 101. The refrigeration system 103 includes a compressor 31, a condenser 32, an evaporator 33, a throttling device 34, and a liquid storage tank 105.

[0103] Figure 2 The figure shows a schematic diagram of a refrigeration system 103 provided by an embodiment of this application. As Figure 2 shown, the exhaust port of the compressor 31 is communicated with the condenser 32, and the intake port of the compressor 31 is communicated with the evaporator 33. The throttling device 34 is disposed between the evaporator 33 and the condenser 32.

[0104] The liquid storage tank 105 is disposed between the intake port of the compressor 31 and the evaporator 33. By providing the liquid storage tank 105, liquid refrigerant can be prevented from entering the compressor 31.

[0105] The refrigeration system 103 is configured to refrigerate the storage compartment.

[0106] Specifically, the compressor 31 is configured to provide power for the refrigeration of the refrigerator.

[0107] The condenser 32 is configured to dissipate heat from the refrigerant coming from the compressor 31.

[0108] The evaporator 33 is configured to provide cooling capacity for the storage compartment. Exemplarily, if the refrigerator is a dual-system refrigerator or a triple-system refrigerator, the evaporator 33 can be, for example, an evaporator for refrigerating the freezer compartment. The refrigeration system 103 further includes an evaporator for refrigerating other compartments. The connection between this evaporator and the condenser 32 can be the same as the connection between the evaporator 33 and the condenser 32, and details are not elaborated here.

[0109] In a possible implementation, the evaporator 33 can be a microchannel heat exchanger. Figure 3 The figure shows a schematic diagram of a refrigeration system 103 in which the evaporator 33 provided by an embodiment of this application is a microchannel heat exchanger. As Figure 3 shown, the microchannel heat exchanger includes a first pipeline 10, a second pipeline 19, and a first gas-liquid separator 11 disposed between the first pipeline 10 and the second pipeline 19.

[0110] The first gas-liquid separator 11 includes:

[0111] A first main body structure 111, which is constructed with a first internal cavity. The first internal cavity includes a first gas collecting cavity 112, a first gas-liquid separation chamber 113, and a first liquid collecting cavity 114 that are connected in sequence from top to bottom.

[0112] A first gas distribution pipe joint 13, which is arranged above the first main body structure 111 and is respectively connected to the first gas collecting cavity 112 and the gas storage tank 105.

[0113] A first liquid distribution pipe joint 14, which is arranged below the first main body structure 111 and is respectively connected to the first liquid collecting cavity 114 and the second pipeline 19.

[0114] A first flat pipe joint 12, one end of which is welded to the side wall of the first main body structure 111 and is connected to the first gas-liquid separation chamber 113. The first end a1 of the first pipeline 10 is inserted into and welded to the other end of the first flat pipe joint 12.

[0115] In a possible implementation manner, the microchannel heat exchanger may further include a first connection assembly 15, as Figure 3 shown, the first connection assembly 15 includes a first connection pipe 16, a first circular joint 17, and a second flat pipe joint 18 that are connected in sequence. The first connection pipe 16 is connected to the first liquid distribution pipe joint 14. The first end b1 of the second pipeline 19 is connected to the second flat pipe joint 18, and its second end b2 is connected to the gas storage tank 105.

[0116] In a possible implementation manner, the inlet of the first circular joint 17 faces downward, and the outlet of the first circular joint 17 faces upward, so that when the refrigerant flows through the first circular joint 17, it soaks the first circular joint 17 from bottom to top and enters the second pipeline 19.

[0117] Exemplarily, Figure 4 is a schematic diagram of the refrigerant flow when the refrigeration system is in the refrigeration mode, as Figure 4 shown, the low-temperature and low-pressure refrigerant is sucked into the compressor 31, compressed into a high-temperature and high-pressure refrigerant in the cylinder of the compressor 31, and then enters the condenser 32. The high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 32, and the temperature continuously drops and is gradually cooled into a liquid. Then, it passes through the throttling device 34 for throttling and pressure reduction to become a normal-temperature and low-pressure wet vapor (i.e., a two-phase mixture composed of gas and liquid), and then starts to absorb heat and vaporize in the evaporator 33, not only reducing the temperature of the evaporator 33 and its surroundings, but also turning the refrigerant into a low-temperature and low-pressure gas, and thus passing through the compressor 31 again to complete the refrigeration cycle of the refrigerator.

[0118] Among them, Figure 4The arrow in it indicates the flow direction of the refrigerant. In the figure, for the sake of clearly showing the flow direction of the refrigerant, the icons of each component in the evaporator 33 are not shown, and reference can be made to Figure 3 .

[0119] In a possible implementation, the evaporator 33 further includes a first header 20 and a second header 21. As Figure 3 shown, the first header 20 can be arranged at the second end a2 of the first pipeline 10. The first header 20 is connected to the throttling device 34 and can be used to distribute the refrigerant entering the evaporator 33 to each microchannel of the first pipeline 10. The second header 21 can be arranged at the second end b2 of the second pipeline 19. The second header 21 is communicated with the air inlet of the compressor 31. After the refrigerant exchanges heat through multiple microchannels of the second pipeline 19, the refrigerant is collected from each microchannel in the second pipeline 19 through the second header 21 and guided to flow out of the evaporator 33. With such an arrangement, the connection between the evaporator 33 and the throttling device 34 and the gas storage tank 105 can be realized.

[0120] It can be understood that both the first pipeline 10 and the second pipeline 19 are microchannel flat tubes, that is, flat tubes formed by multiple microchannels (for example, the equivalent diameter is 10 - 1000 μm). The specific structure of the present application will not be described in detail.

[0121] In a possible implementation, Figure 5 is a schematic structural diagram of an evaporator 33 provided by an embodiment of the present application. As Figure 5 shown, the evaporator 33 further includes a third connection assembly 22 and a fourth connection assembly 23. Among them, the second end a2 of the first pipeline 10 can be communicated with the throttling device 34 through the third connection assembly 22, and the second end b2 of the second pipeline 19 can be communicated with the gas storage tank 105 through the fourth connection assembly 23. With such an arrangement, the connection between the microchannel evaporator 33 and the throttling device 34 and the gas storage tank 105 can be realized.

[0122] Exemplarily, for any one of the third connection assembly 22 and the fourth connection assembly 23, the connection assembly can include a connecting pipe, a circular joint and a flat tube joint connected in sequence. The specific structure can refer to Figure 3 the first connection assembly 15, which will not be elaborated here. It can be understood that the connecting pipe in the third connection assembly 22 and the fourth connection assembly 23 can be bent according to the requirements of the pipeline setting, and is not limited to Figure 5 or Figure 3 the bending method of the first connecting pipe 16 exemplified in

[0123] The microchannel heat exchanger can be used as the evaporator 33 of the refrigeration system 103, so as to realize gas-liquid separation in the evaporator 33, reduce the dryness of the refrigerant in the evaporator 33, improve the heat exchange efficiency of the evaporator 33, vaporize the liquid refrigerant flowing into the compressor after passing through the evaporator 33, and prevent liquid slugging of the compressor 31.

[0124] In a possible implementation, the ratio of the length of the first pipeline 10 to the length of the second pipeline 19 can be within a first preset range. Exemplarily, the first preset range can be greater than or equal to 0.8 and less than or equal to 1, such that the length of the first pipeline 10 is the same as or approximately the same as the length of the second pipeline 19. For example, the ratio of the length of the first pipeline 10 to the length of the second pipeline 19 can be 1, that is, the length of the first pipeline 10 is the same as the length of the second pipeline 19, indicating that the first gas-liquid separator 11 is arranged at the middle position of the microchannel flat tube of the evaporator 33.

[0125] With such an arrangement, the unevaporated liquid refrigerant can be separated earlier, reducing the proportion of the liquid refrigerant entering the latter half of the evaporator, which helps to improve the heat exchange efficiency of the evaporator 33. Moreover, during the process of the liquid refrigerant flowing and boiling in the pipeline and undergoing a phase change, different flow states are formed in the pipeline, resulting in an increase in the flow resistance. Usually, an obvious increase in resistance starts to occur at about half of the tube length of the microchannel flat tube of the evaporator 33. Installing the first gas-liquid separator 11 at the middle position of the microchannel flat tube of the evaporator 33 can reduce the pressure loss of the refrigerant in the evaporator 33 and avoid the influence of excessive pressure loss on the heat exchange efficiency. That is to say, the position where the first gas-liquid separator 11 is arranged can be the position where the resistance change of the refrigerant in the microchannel flat tube of the evaporator 33 is the largest.

[0126] In a possible implementation, the ratio of the length of the first pipeline 10 to the length of the microchannel flat tube of the evaporator 33 is within a second preset range. Exemplarily, the second preset range can be greater than or equal to 0.6 and less than or equal to 0.85, such that the length of the first pipeline 10 is approximately 3 times the length of the second pipeline 19. For example, if the ratio of the length of the first pipeline 10 to the length of the microchannel flat tube of the evaporator 33 is 0.75, it means that the length of the first pipeline 10 is 3 times the length of the second pipeline 19, and the first gas-liquid separator 11 is arranged close to the air inlet of the compressor 31.

[0127] With such an arrangement, it can be ensured that after the refrigerant flows through most of the microchannel flat tubes of the evaporator 33, gas-liquid separation is carried out. At this time, the liquid component in the refrigerant is relatively less, and the gas-liquid separation effect is better. Moreover, it can reduce the pressure loss of the refrigerant in the microchannel and improve the heat exchange efficiency of the evaporator 33.

[0128] In a possible implementation, the first gas-liquid separator 11 is disposed at the middle position of the microchannel flat tube of the evaporator 33, and a second gas-liquid separator 27 may also be disposed in the second pipeline 19.

[0129] Figure 6 FIG. is a schematic structural diagram of another refrigeration system 103 provided by an embodiment of the present application. As Figure 6 shown, the second pipeline 19 includes a first sub-pipeline 28 and a second sub-pipeline 29. The evaporator 33 further includes:

[0130] A second gas-liquid separator 27 having a third flat tube joint 30 communicating with the first sub-pipeline 28, a second gas separation pipe joint 35 for discharging gas, and a second liquid separation pipe joint 36 for discharging liquid. Specifically, the second gas-liquid separator 27 includes a second main structure 271 configured with a second internal cavity. The second internal cavity includes a second gas collection cavity 272, a second gas-liquid separation chamber 273, and a second liquid collection cavity 274 that are sequentially communicated from top to bottom. The second gas separation pipe joint 35 is disposed above the second main structure 271 and communicates with the second gas collection cavity 272. The second liquid separation pipe joint 36 is disposed below the second main structure 271 and communicates with the second liquid collection cavity 274. One end of the third flat tube joint 30 is welded to the side wall of the second main structure 271 and communicates with the second gas-liquid separation chamber 273.

[0131] A second connection assembly 37 includes a second connection pipe 38, a second circular joint 39, and a fourth flat tube joint 40 that are sequentially communicated. The second connection pipe 38 communicates with the second liquid separation pipe joint 36.

[0132] Wherein, the first end d1 of the second sub-pipeline 29 communicates with the fourth flat tube joint 40, and the second end d2 of the second sub-pipeline 29 communicates with the compressor 31.

[0133] Wherein, the setting manner of the second circular joint 39 may be the same as that of the first circular joint 17. Reference may be made to the above embodiment and will not be elaborated here.

[0134] It can be understood that Figure 6 For the convenience of showing the connection relationship, the lengths of the first pipeline 10, the first sub-pipeline 28, and the second sub-pipeline 29 are not shown.

[0135] In a possible implementation, the length of the first sub-pipeline 28 may be the same as the length of the second sub-pipeline 29, that is, the second gas-liquid separator 27 is disposed at the middle position of the microchannel flat tube of the second pipeline 19. That is to say, the position where the second gas-liquid separator 27 is disposed may be at one-third of the overall length of the microchannel flat tube of the microchannel evaporator 33 near the air inlet of the compressor 31.

[0136] After a gas-liquid separator is provided at the middle position of the evaporator 33, a gas-liquid separator can also be provided in the second pipeline close to the compressor 31. Through the synergistic effect of the two gas-liquid separators, a double guarantee can be formed, further reducing the risk of liquid refrigerant entering the compressor 31 and improving the safety and reliability of the refrigeration system.

[0137] In a possible implementation manner, the condenser 32 can be a microchannel heat exchanger. Figure 7 The structural schematic diagram of the refrigeration system 103 with the condenser 32 as a microchannel heat exchanger provided by the embodiment of the present application is shown in Figure 7 As shown, the exhaust port of the compressor 31 is communicated with the second end a2 of the first pipeline 10. The first liquid separation pipe joint 14, the throttling device 34, the evaporator 33, the liquid storage tank 105 and the intake port of the compressor 31 are connected in sequence.

[0138] Specifically, the first gas separation pipe joint 13 can be communicated with the first end b1 of the second pipeline 19 through the first connecting pipe 16, the first circular joint 17 and the second flat pipe joint 18.

[0139] The microchannel heat exchanger can be used as the condenser 32 of the refrigeration system, so as to realize gas-liquid separation in the condenser 32, improve the dryness of the refrigerant in the condenser 32, and thus improve the heat exchange efficiency of the condenser 32.

[0140] In a possible implementation manner, the condenser 32 is a microchannel heat exchanger, and the evaporator 33 can also be a microchannel heat exchanger. Figure 8 The structural schematic diagram of a refrigeration system 103 in which both the condenser 32 and the evaporator 33 are microchannel heat exchangers provided by the embodiment of the present application is shown in Figure 8 As shown, the evaporator 33 includes a third pipeline 339, a fourth pipeline 340, and a third gas-liquid separator 331 provided between the third pipeline 339 and the fourth pipeline 340.

[0141] Among them, the third gas-liquid separator 331 includes:

[0142] A third main body structure 332, which is constructed with a third internal cavity. The third internal cavity includes a third gas collecting cavity 333, a third gas-liquid separation chamber 334 and a third liquid collecting cavity 335 that are communicated with each other in sequence from top to bottom.

[0143] A third gas separation pipe joint 336, which is arranged above the third main body structure 332 and is communicated with the third gas collecting cavity 333.

[0144] A third liquid separation pipe joint 337, which is arranged below the third main body structure 332 and is communicated with the third liquid collecting cavity 335.

[0145] The fifth flat tube joint 338 has one end welded to the side wall of the third main structure 332 and is connected to the third gas-liquid separation chamber 334. The first end of the third pipeline 339 is inserted into and welded to the other end of the fifth flat tube joint 338. One end of the fourth pipeline 340 is connected to the third liquid separation tube joint 337, and the other end is connected to the intake port of the compressor 31 through the liquid storage tank 105. The third gas separation tube joint 336 is connected to the liquid storage tank 105.

[0146] Specifically, as Figure 8 shown, one end of the fourth pipeline 340 can be connected to the third liquid separation tube joint 337 through the fifth connection assembly 341. The structure of the fifth connection assembly 341 can be the same as that of the first connection assembly 15, which will not be elaborated here.

[0147] With such an arrangement, gas-liquid separation can be achieved in the condenser 32, the dryness of the refrigerant in the condenser 32 can be increased, thereby improving the heat exchange efficiency of the condenser 32. At the same time, the heat exchange efficiency of the evaporator 33 can be improved, further enhancing the refrigeration efficiency of the refrigeration system 103. And the liquid refrigerant flowing into the compressor 31 after passing through the evaporator 33 is vaporized to prevent liquid slugging of the compressor 31.

[0148] In a possible implementation manner, during installation, the insertion depth of the first end a1 of the first pipeline 10 into the first flat tube joint 12 can be set according to actual requirements. Figure 9 For the schematic diagram of the first gas-liquid separator 11 as an example, exemplary, a depth scale (not shown in the figure) can be provided on the first flat tube joint 12. During installation, the installer can insert the first end a1 of the first pipeline 10 to the corresponding position according to this depth scale.

[0149] In a possible implementation manner, the flow rate of the refrigerant flowing through the first end a1 of the first pipeline 10 is negatively correlated with the insertion depth of the first end a1 of the first pipeline 10 into the first flat tube joint 12. Setting the corresponding depth according to the flow rate of the refrigerant helps to form a fluid distribution conducive to gas-liquid separation. That is to say, when the flow rate of the refrigerant is larger, the insertion depth of the first end a1 of the first pipeline 10 into the first flat tube joint 12 can be smaller (i.e., a shallower access position), so that the refrigerant experiences a longer flow path before entering the first gas-liquid separation chamber 113. Therefore, the separation time of the gas-liquid two-phase in the first gas-liquid separation chamber 113 is increased, thereby improving the efficiency of gas-liquid separation.

[0150] In a possible implementation manner, the insertion depth of the first end a1 of the first pipeline 10 into the first flat tube joint 12 can be greater than or equal to 2 cm and less than or equal to 7 cm. Correspondingly, the flow rate through the first end a1 of the first pipeline 10 is greater than or equal to 0.17 g / s (grams per second) and less than or equal to 0.34 g / s.

[0151] That is to say, within the above flow rate range, an appropriate insertion depth can be selected within this depth range, which can further improve the gas-liquid separation efficiency.

[0152] It can be understood that the refrigerant flow rates of the condenser 32 and the evaporator 33 are different, and different insertion depths can be set according to actual requirements when setting the gas-liquid separator.

[0153] In a possible implementation manner, Figure 10 is a schematic diagram of the microchannel flat tubes of the evaporator 33 of this application example arranged around the side wall of the inner container 104. As Figure 10 shown, the box body 101 further includes an inner container 104, and the storage chamber is formed by the inner container 104. The microchannel flat tubes of the evaporator 33 can be arranged in a fitting manner around the side wall of the inner container 104, Figure 10 and only part of the microchannel flat tubes are shown in the figure. The width direction of the second flat tube joint 18 is parallel to the side wall of the inner container 104, so that the second flat tube joint 18 can be arranged in a fitting manner with the inner container 104 to ensure the heat exchange effect.

[0154] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0155] For the sake of convenience of explanation, the above description has been made in combination with specific implementation manners. However, the above exemplary discussion is not intended to be exhaustive or to limit the implementation manners to the specific forms disclosed above. According to the above teachings, various modifications and deformations can be obtained. The selection and description of the above implementation manners are for better explaining the principles and actual applications, so that those skilled in the art can better use the implementation manners and various different deformed implementation manners suitable for specific use considerations.

[0156] In the present application, terms such as "exemplary", "in some embodiments", "in other embodiments", etc. are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the term "exemplary" is intended to present concepts in a specific manner.

[0157] In this application, the words "of", "corresponding", "relevant", and "associated" may sometimes be used interchangeably. It should be noted that when the differences are not emphasized, they convey the same meaning.

Claims

1. A refrigerator, characterized in that: include: A box body is constructed with a storage room; A refrigeration system arranged in the box includes a microchannel heat exchanger; the microchannel heat exchanger includes a first pipeline, a second pipeline, and a first gas-liquid separator arranged between the first pipeline and the second pipeline; The refrigeration system is configured to cool the storage compartment; Wherein, the first gas-liquid separator comprises: The first main body structure is configured with a first internal chamber; the first internal chamber comprises a first gas collecting chamber, a first gas-liquid separation chamber and a first liquid collecting chamber which are sequentially connected from top to bottom; A first gas distribution pipe joint, disposed above the first main structure and connected to the first gas collecting cavity; A first liquid distribution pipe joint is disposed below the first main body structure and is connected to the first liquid collecting chamber; the first gas distribution pipe joint or the first liquid distribution pipe joint is connected to the second pipeline; A first flat tube joint has one end welded to the side wall of the first main structure and connected to the first gas-liquid separation chamber; a first end of the first pipeline is inserted and welded to the other end of the first flat tube joint.

2. The refrigerator according to claim 1, characterized in that: The flow rate of the refrigerant flowing through the first end of the first pipeline is negatively correlated with the depth to which the first end of the first pipeline is inserted into the first flat tube joint.

3. The refrigerator according to claim 2, characterized in that: The depth is greater than or equal to 2 centimeters and less than or equal to 7 centimeters.

4. The refrigerator according to any one of claims 1 to 3, characterized in that: The microchannel heat exchanger is an evaporator; the refrigeration system also includes a compressor, a condenser, a throttling device and a liquid storage tank; Among them, the exhaust port of the compressor is connected to the condenser, and the condenser is connected to the second end of the first pipeline through the throttling device; the first liquid distribution pipe joint is connected to the first end of the second pipeline, and the second end of the second pipeline is connected to the air inlet of the compressor through the liquid storage tank; the first gas distribution pipe joint is connected to the liquid storage tank.

5. The refrigerator according to claim 4, characterized in that: A ratio of the length of the first pipeline to the length of the second pipeline is within a first preset range.

6. The refrigerator according to claim 5, characterized in that: The evaporator also includes a second gas-liquid separator; The second pipeline includes a first sub-pipeline and a second sub-pipeline, and the second gas-liquid separator is arranged between the first sub-pipeline and the second sub-pipeline; Wherein, the second gas-liquid separator comprises: The second main body structure is configured with a second internal chamber; the second internal chamber is divided into a second gas collecting chamber, a second gas-liquid separation chamber and a second liquid collecting chamber from top to bottom; A second gas distribution pipe joint is disposed above the second main body structure and is connected to the second gas collecting cavity; A second liquid dispensing pipe joint, disposed below the second main body structure and connected to the second liquid collecting chamber; A third flat tube joint, one end of which is welded to the side wall of the second main structure and connected to the second gas-liquid separation chamber; the first end of the first sub-pipeline is inserted and welded to the other end of the third flat tube joint; one end of the second sub-pipeline is connected to the second liquid distribution pipe joint, and the other end is connected to the air inlet of the compressor through the liquid storage tank; the second gas distribution pipe joint is connected to the liquid storage tank.

7. The refrigerator according to claim 4, characterized in that: A ratio of the length of the first pipeline to the length of the microchannel heat exchanger is within a second preset range, so that the first gas-liquid separator is disposed close to the compressor.

8. The refrigerator according to any one of claims 1 to 3, characterized in that: The microchannel heat exchanger is a condenser; the refrigeration system also includes a compressor, an evaporator, a throttling device and a liquid storage tank; Among them, the exhaust port of the compressor is connected to the second end of the first pipeline; the first gas distribution pipe joint is connected to the first end of the second pipeline; the first liquid distribution pipe joint, the throttling device, the evaporator, the liquid storage tank and the air inlet of the compressor are connected in sequence.

9. The refrigerator according to claim 8, characterized in that: The evaporator comprises a third pipeline, a fourth pipeline and a third gas-liquid separator arranged between the third pipeline and the fourth pipeline; Wherein, the third gas-liquid separator comprises: The third main body structure is constructed with a third internal chamber; the third internal chamber is divided into a third gas collecting chamber, a third gas-liquid separation chamber and a third liquid collecting chamber from top to bottom; A third gas distribution pipe joint is arranged above the third main body structure and is connected to the third gas collecting cavity; A third liquid distributing pipe joint is disposed below the third main body structure and is connected to the third liquid collecting chamber; A fifth flat tube joint, one end of which is welded to the side wall of the third main structure and connected to the third gas-liquid separation chamber; the first end of the third pipeline is inserted and welded to the other end of the fifth flat tube joint; one end of the fourth pipeline is connected to the third liquid distribution pipe joint, and the other end is connected to the air inlet of the compressor through the liquid storage tank; the third gas distribution pipe joint is connected to the liquid storage tank.

10. A refrigerator, characterized in that: include: A box body is constructed with a storage room; The refrigeration system arranged in the box includes a microchannel heat exchanger; a first gas-liquid separator is arranged between the first pipeline and the second pipeline of the porous flat tube of the microchannel heat exchanger; The refrigeration system is configured to cool the storage room; the first gas-liquid separator comprises: a first main body structure, a first gas-distribution pipe joint arranged above the first main body structure, a first liquid-distribution pipe joint arranged below the first main body structure, a first gas-liquid separation chamber arranged in the first main body structure, and a first flat pipe joint; the first gas-distribution pipe joint or the first liquid-distribution pipe joint is in communication with the second pipeline; Among them, one end of the first flat tube joint is welded to the side wall of the first main structure and connected to the first gas-liquid separation chamber; the first end of the first pipeline is welded to the other end of the first flat tube joint after being inserted according to the required insertion depth.

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