Refrigerator

Abstract

The embodiment of the utility model belongs to the technical field of household appliances and provides a refrigerator, a micro-channel evaporator in a refrigerating system is divided into two flows, and a first gas-liquid separator is arranged between the two flows. An inlet of a second pipeline used for being connected with the micro-channel evaporator and an outlet of a first circular connector of the gas-liquid separator are arranged downwards, and an outlet of the second pipeline is arranged upwards, so that the liquid refrigerant fully immerses the circular connector from bottom to top when flowing on the first circular connector under the action of gravity and then enters the second pipeline. In other words, in the flowing process from bottom to top, the liquid refrigerant enters the second pipeline after fully soaking the first circular connector and can be evenly distributed in the micro-channel flat pipes of the second pipeline, and more efficient heat exchange can be achieved. And the contact area between the refrigerant of the first connecting pipe between the first circular joint and the first liquid separation pipe joint of the first gas-liquid separator and the wall surface of the pipeline is increased, so that the heat exchange efficiency 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] Microchannel heat exchangers have characteristics such as high-efficiency heat transfer and compact structure design, thus saving space, and are widely used in multiple fields. For example, a microchannel heat exchanger is used as an evaporator of the refrigeration system of a refrigerator (hereinafter referred to as a microchannel evaporator).

[0003] Currently, in the scenario where a microchannel heat exchanger is used as an evaporator of the refrigeration system of a refrigerator, when the gas-liquid two-phase mixture formed after the refrigerant passes through the capillary tube between the evaporator and the condenser enters the microchannel evaporator, 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 evaporator. Utility Model Content

[0004] Embodiments of the present application provide a refrigerator that can be used to improve the heat transfer efficiency of a microchannel evaporator.

[0005] In a first aspect, embodiments of the present application provide a refrigerator, including:

[0006] A cabinet, configured with a storage compartment;

[0007] A refrigeration system disposed in the cabinet, including a compressor, a microchannel evaporator, a throttling device, and a condenser; the exhaust port of the compressor is communicated with the condenser, and the intake port of the compressor is communicated with the microchannel evaporator; the throttling device is disposed between the microchannel evaporator and the condenser; the refrigeration system is configured to refrigerate the storage compartment;

[0008] Wherein, the microchannel evaporator includes:

[0009] A first pipeline, communicated with the condenser through the throttling device;

[0010] A first gas-liquid separator, having a first flat-tube joint communicated with the first pipeline, a first gas separation pipe joint for discharging gas, and a first liquid separation pipe joint for discharging liquid; the first gas separation pipe joint is communicated with the intake port of the compressor;

[0011] A first connection assembly, including a first connection pipe, a first circular joint, and a second flat-tube joint that are sequentially communicated; the first connection pipe is communicated with the first liquid separation pipe joint;

[0012] A second pipeline, whose first end is communicated with the second flat-tube joint and the second end is communicated with the compressor;

[0013] Among them, the inlet of the first circular joint faces downward, and the outlet of the first circular joint faces upward, so that when the refrigerant flows through the first circular joint, it soaks the first circular joint from bottom to top and enters the second pipeline.

[0014] In this embodiment, the microchannel evaporator in the refrigeration system is divided into two processes, and a first gas-liquid separator is arranged between these two processes. The inlet of the first circular joint connecting the second pipeline of the microchannel evaporator and the gas-liquid separator is arranged downward, and the outlet is arranged upward, so that the liquid refrigerant soaks the circular joint from bottom to top when flowing through the first circular joint under the action of gravity, and then enters the second pipeline. That is to say, when the liquid refrigerant flows from bottom to top, after soaking the first circular joint, it enters the second pipeline, and can be evenly distributed in the microchannel flat tube of the second pipeline, which helps to achieve more efficient heat exchange. Moreover, the contact area between the refrigerant in the first connecting pipe between the first circular joint and the first liquid separation pipe joint of the first gas-liquid separator and the pipe wall is increased, thereby improving the heat exchange efficiency.

[0015] In some embodiments of the present application, the axial direction of the first circular joint is the vertical direction.

[0016] With such a setting, the liquid refrigerant can be more evenly distributed in the entire connecting pipe. And in the vertical direction, the gravity of the liquid refrigerant helps to push the bubbles and incompletely filled areas to the top of the pipe cavity, reducing the retention of bubbles in the pipeline and the formation of dead zones. This helps to maintain the continuity and stability of the refrigerant flow and further improves the heat exchange efficiency.

[0017] In some embodiments of the present application, the box body further includes an inner container, and the inner container is configured with the storage chamber; the microchannel evaporator is arranged around the circumferential side wall of the inner container; the width direction of the second flat tube joint is parallel to the circumferential side wall of the inner container;

[0018] The first microchannel flat tube near the first end in the second pipeline is bent, and the first end is communicated with the second flat tube joint.

[0019] With such a setting, by connecting the second pipeline to the second flat tube joint in a bent manner, the occupied space of the microchannel evaporator can be saved while ensuring the heat exchange effect.

[0020] In some embodiments of the present application, the first microchannel flat tube includes a connecting portion and a second microchannel flat tube;

[0021] The width direction of the second microchannel flat tube is parallel to the side wall of the inner container; the connecting portion is bent, the first end of the connecting portion is connected to the second flat tube joint, and the second end of the connecting portion is connected to the second microchannel flat tube.

[0022] With such a setting, while ensuring the heat exchange effect, by connecting the second microchannel flat tube of the second pipeline to the second flat tube joint through the connecting part and bending the connecting part, it can be flexibly installed before welding the pipeline.

[0023] 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.

[0024] With such a setting, the uncompletely evaporated 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 microchannel evaporator.

[0025] In some embodiments of the present application, the second pipeline includes a first sub-pipeline and a second sub-pipeline; the microchannel evaporator further includes:

[0026] The second gas-liquid separator has a third flat tube joint connected to the first sub-pipeline, a second gas separation pipe joint for discharging gas, and a second liquid separation pipe joint for discharging liquid;

[0027] The second connection assembly includes a second connecting pipe, a second circular joint, and a fourth flat tube joint that are connected in sequence; the second connecting pipe is connected to the second liquid separation pipe joint;

[0028] Wherein, the first end of the second sub-pipeline is connected to the fourth flat tube joint, and the second end of the second sub-pipeline is connected to the compressor.

[0029] With such a setting, 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 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 evaporator is within a second preset range, so that the first gas-liquid separator is arranged close to the air inlet of the compressor.

[0031] With such a setting, it can be ensured that after the refrigerant flows through most of the microchannel flat tubes of the microchannel evaporator, gas-liquid separation is carried out. 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 microchannel and improve the heat exchange efficiency of the microchannel evaporator

[0032] In some embodiments of the present application, the first gas-liquid separator includes a main body structure, the main body structure is constructed with an internal cavity, and the internal cavity includes a gas collection cavity, a gas-liquid separation chamber, and a liquid collection cavity that are connected in sequence from top to bottom;

[0033] Among them, the first gas distribution pipe joint is communicated with the gas collecting cavity, and the first liquid distribution pipe joint is communicated with the liquid collecting cavity.

[0034] With such a setting, it is beneficial for the gas-liquid separator to separate the refrigerant mixed with two phases, and it is convenient for the gas and liquid to flow out through different chambers.

[0035] In some embodiments of the present application, the refrigeration system further includes a liquid storage tank, and the liquid storage tank is arranged between the air inlet of the compressor and the second pipeline;

[0036] The first gas distribution pipe joint is communicated with the liquid storage tank.

[0037] With such a setting, the first gas distribution pipe joint can be connected to the liquid storage tank before the air inlet of the compressor, and enter the compressor through the liquid storage tank, which can save the space between the compressor and the liquid storage tank and is convenient for processing.

[0038] In a second aspect, the present application provides a refrigerator, including:

[0039] A box body, which is constructed with a storage chamber;

[0040] A refrigeration system arranged in the box body, including a compressor, a microchannel evaporator, a throttling device and a condenser; the exhaust port of the compressor is communicated with the condenser, and the air inlet of the compressor is communicated with the microchannel evaporator; the throttling device is arranged in the pipeline between the microchannel evaporator and the condenser; the refrigeration system is configured to refrigerate the storage chamber;

[0041] Among them, the microchannel evaporator includes:

[0042] A first pipeline, which is communicated with the condenser through the throttling device;

[0043] A second pipeline, which is communicated with the compressor;

[0044] A gas-liquid separator arranged between the first pipeline and the second pipeline, which is configured to perform gas-liquid separation on the refrigerant entering the first pipeline.

[0045] With such a setting, a gas-liquid separator can be arranged in the microchannel evaporator to perform gas-liquid separation on the refrigerant in the microchannel evaporator through the gas-liquid separator, so that the liquid refrigerant enters the second pipeline to improve the heat exchange efficiency of the microchannel evaporator. Description of the Drawings

[0046] To more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required for the description of the embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0047] Figure 1 Schematic diagram of a refrigerator provided by an embodiment of the present application;

[0048] Figure 2 Schematic diagram of the structure of a refrigeration system 103 provided by an embodiment of the present application;

[0049] Figure 3 Schematic diagram of the structure of a microchannel evaporator 33 provided by an embodiment of the present application;

[0050] Figure 4 Schematic diagram of the structure of a microchannel evaporator 33 provided by an embodiment of the present application;

[0051] Figure 5 Schematic diagram of the first circular joint 17 for illustration;

[0052] Figure 6 Schematic diagram of the structure of a first connection component 15 provided by an example of the present application;

[0053] Figure 7 Schematic diagram of the microchannel flat tubes of the microchannel evaporator 33 provided by an example of the present application arranged around the side wall of the inner container 104;

[0054] Figure 8 Schematic diagram of the bending setting of the first microchannel flat tube 24 of the second pipeline 19 provided by an example of the present application;

[0055] Figure 9 Schematic diagram of the second pipeline 19 provided by an example of the present application;

[0056] Figure 10 Schematic diagram of the structure of another refrigeration system 103 provided by an embodiment of the present application;

[0057] Figure 11 Schematic diagram of the structure of yet another refrigeration system 103 provided by an embodiment of the present application;

[0058] Figure 12 Schematic diagram of the structure of yet another refrigeration system 103 provided by an embodiment of the present application.

[0059] Explanation of reference numerals:

[0060] 101 - Cabinet; 102 - Door body;

[0061] 103 - Refrigeration system; 104 - Inner container;

[0062] 105 - Liquid storage tank; 31 - Compressor;

[0063] 32 - Condenser; 33 - Microchannel evaporator;

[0064] 34 - Throttling device; 10 - First pipeline;

[0065] 12 - First flat tube joint; 13 - First gas distribution pipe joint;

[0066] 14 - First liquid distribution pipe joint; 111 - Main body structure;

[0067] 113 - Gas - liquid separation chamber; 114 - Liquid collection chamber;

[0068] 112 - Gas collection chamber; 15 - First connection component;

[0069] 16 - First connection pipe; 17 - First circular joint;

[0070] 18 - Second flat tube joint; 19 - Second pipeline;

[0071] 20 - First manifold; 21 - Second manifold;

[0072] a1 - First end of the first pipeline 10; a2 - Second end of the first pipeline 10;

[0073] b1 - First end of the second pipeline 19; b2 - Second end of the second pipeline 19;

[0074] 22 - Third connection component; 23 - Fourth connection component;

[0075] 24 - First microchannel flat tube; 25 - Connection part;

[0076] 26 - Second microchannel flat tube; c1 - First end of the connection part 25;

[0077] c2 - Second end of the connection part 25; 27 - Second gas - liquid separator;

[0078] 28 - First sub - pipeline; 29 - Second sub - pipeline;

[0079] 30 - Third flat tube joint; 35 - Second gas distribution pipe joint;

[0080] 36 - Second liquid distribution pipe joint; 37 - Second connection component;

[0081] 38 - Second connection pipe; 39 - Second circular joint;

[0082] 40 - Fourth flat pipe joint; d1 - First end of the second sub - pipeline 29;

[0083] d2 - Second end of the second sub - pipeline 29. Detailed implementation manners

[0084] To make the objectives, implementation manners and advantages of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application in combination with the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part rather than all of the embodiments of this application.

[0085] It should be noted that the brief descriptions of the terms in this application are only for facilitating the understanding of the subsequent 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.

[0086] In addition, the terms "including" and "having" and any variations thereof are intended to cover but not exclusively include. For example, a product or device including a series of components does not necessarily have to be limited to those components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0087] In the description of this 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 facilitating the description of this 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 therefore cannot be understood as a limitation of this application.

[0088] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0089] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" 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 directly connected or indirectly connected 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 this application can be understood according to specific circumstances.

[0090] Using a microchannel heat exchanger as the evaporator of the refrigeration system of a refrigerator can improve the heat exchange efficiency of the evaporator and save space inside the refrigerator.

[0091] However, the microchannel evaporator is connected to the condenser through a capillary tube. When the refrigerant forms a two-phase mixture composed of gas and liquid after passing through the capillary tube between the evaporator and the condenser and 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 exchange efficiency of the microchannel heat exchanger.

[0092] Furthermore, a gas-liquid separator can be used in the microchannel evaporator to separate the two-phase mixture. Then, how to set the gas-liquid separator in the microchannel evaporator to improve its heat exchange efficiency is a problem to be solved.

[0093] Therefore, this application provides a refrigerator that can divide the microchannel evaporator in the refrigeration system into two processes and set a gas-liquid separator between these two processes to achieve gas-liquid separation of the refrigerant in the microchannel evaporator. Further, the inlet of the circular joint connecting the second pipeline of the microchannel evaporator and the gas-liquid separator is set downward, and the outlet is set upward, so that the liquid refrigerant flows on the circular joint under the action of gravity and soaks the circular joint from bottom to top, and then enters the second pipeline. That is to say, when the liquid refrigerant flows from bottom to top, after soaking the circular joint, it enters the second pipeline and can be evenly distributed in the microchannel flat tubes of the second pipeline, which helps to achieve more efficient heat exchange. Moreover, it increases the contact area between the refrigerant in the connecting pipe between the circular joint and the liquid distribution pipe joint of the gas-liquid separator and the pipe wall, thereby improving the heat exchange efficiency and enabling the refrigeration system to transfer heat faster and more effectively.

[0094] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0095] First, the specific structure of a refrigerator provided in the embodiments of this application will be described. Exemplarily, Figure 1 is a schematic diagram of a refrigerator provided in the embodiments of this application. As Figure 1 shown, the refrigerator includes a box body 101, a door body 102, and a storage compartment provided inside the box body 101.

[0096] In a possible implementation manner, the storage compartment includes a refrigerating compartment and a freezing compartment, etc.Figure 1 is not shown in the figure.

[0097] It can be understood that Figure 1 FIG. is only a schematic diagram of a refrigerator applicable to the present application, and it can also be a refrigerator with other structures. The present application does not limit this. Exemplarily, the refrigerator according to the embodiment of the present 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). Usually Figure 1 the exemplary refrigerator is a dual-system refrigerator.

[0098] In a possible implementation manner, the refrigerator further includes a refrigeration system 103 disposed in the cabinet 101. Figure 2 FIG. is a schematic structural diagram of a refrigeration system 103 provided by an embodiment of the present application. As Figure 2 shown, the refrigeration system 103 includes a compressor 31, a condenser 32, a microchannel evaporator 33, and a throttling device 34.

[0099] 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 microchannel evaporator 33. The throttling device 34 is disposed between the microchannel evaporator 33 and the condenser 32. The refrigeration system 103 is configured to refrigerate the storage compartment.

[0100] Specifically, the compressor 31 is configured to provide power for the refrigeration of the refrigerator.

[0101] The condenser 32 is configured to dissipate heat from the refrigerant from the compressor 31.

[0102] The microchannel 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 microchannel 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 microchannel evaporator 33 and the condenser 32, and will not be elaborated here.

[0103] As Figure 2As shown, the refrigerant at low temperature and low pressure is sucked into the compressor 31, compressed into a refrigerant at high temperature and high pressure inside the cylinder of the compressor 31, and then enters the condenser 32. The refrigerant gas at high temperature and high pressure dissipates heat through the condenser 32, the temperature continuously drops, and it is gradually cooled into a liquid. Then, it passes through the throttling device 34 to be throttled and depressurized into a wet vapor at normal temperature and low pressure (i.e., a two-phase mixture composed of gas and liquid). Subsequently, it starts to absorb heat and vaporize inside the microchannel evaporator 33, not only reducing the temperature of the microchannel evaporator 33 and its surroundings, but also turning the refrigerant into a gas at low temperature and low pressure, and then passing through the compressor 31 again to complete the refrigeration cycle of the refrigerator.

[0104] In a possible implementation manner, Figure 3 is a schematic structural diagram of a microchannel evaporator 33 provided by an embodiment of the present application. As Figure 3 shown, the microchannel evaporator 33 includes:

[0105] The first pipeline 10 is communicated with the condenser 32 through the throttling device 34.

[0106] The first gas-liquid separator 11 has a first flat tube joint 12 connected to the first pipeline 10, a first gas separation pipe joint 13 for discharging gas, and a first liquid separation pipe joint 14 for discharging liquid. The first gas separation pipe joint 13 is communicated with the intake port of the compressor 31.

[0107] The first connection assembly 15 includes a first connection pipe 16, a first circular joint 17, and a second flat tube joint 18 that are sequentially communicated. The first connection pipe 16 is communicated with the first liquid separation pipe joint 14.

[0108] The second pipeline 19, its first end is connected to the second flat tube joint 18, and the second end is connected to the compressor 31.

[0109] Among them, 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.

[0110] In a possible implementation manner, the first end a1 of the first pipeline 10 is connected to the first flat tube joint 12, and the second end a2 of the second pipeline 10 is used to be connected to the throttling device 34.

[0111] In a possible implementation manner, as Figure 3 shown, the first end a1 of the first pipeline 10 can be inserted and welded inside the first flat tube joint 12, and the second end a2 of the second pipeline 10 is used to be connected to the throttling device 34.

[0112] With such a setting, the two-phase mixture composed of gas and liquid enters the gas-liquid separator 11 through the first pipeline 10 for gas-liquid separation. Under the action of gravity, the liquid refrigerant enters the second pipeline 19 along the first liquid separation pipe joint 14, the first connecting pipe 16, the first circular joint 17, and the second flat pipe joint 18. Among them, when the liquid refrigerant flows through the first circular joint 17, it fills the first circular joint from bottom to top. That is to say, when the liquid refrigerant flows in the first circular joint 17, it can be evenly distributed in the microchannel flat tube of the second pipeline 19, which helps to achieve more efficient heat exchange. Moreover, the contact area between the liquid refrigerant in the first connecting pipe 16 and the pipe wall is increased, thereby improving the heat exchange efficiency and enabling the refrigeration system to transfer heat faster and more effectively.

[0113] In a possible implementation manner, the microchannel 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 microchannel evaporator 33 into 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 intake port 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 microchannel evaporator 33. With such a setting, the connection between the microchannel evaporator 33 and the throttling device 34 and the compressor 31 can be realized.

[0114] 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.

[0115] In a possible implementation manner, Figure 4 is a schematic structural diagram of a microchannel evaporator 33 provided by an embodiment of the present application. As Figure 4 shown, the microchannel 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 can be communicated with the intake port of the compressor 31 through the fourth connection assembly 23. With such a setting, the connection between the microchannel evaporator 33 and the throttling device 34 and the compressor 31 can be realized.

[0116] 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 pipe joint connected in sequence. The specific structure can refer toFigure 3 The first connecting component 15 will not be elaborated here. It can be understood that the connecting pipes in the third connecting component 22 and the fourth connecting component 23 can be bent according to the requirements of the pipeline setting, and are not limited to Figure 3 the bending method of the first connecting pipe 16 exemplified in

[0117] In a possible implementation manner, the first circular joint 17 can be inclined, as Figure 5 shown. For example, when the box body 101 is placed horizontally, the angle α between the axial direction of the first circular joint 17 and the horizontal line of the horizontal plane where the box body 101 is located can be less than 90 degrees. For example, it can be greater than 45 degrees and less than 90 degrees, so that the inlet of the first circular joint 17 faces downward and the outlet 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. It can be understood that this horizontal plane is the horizontal plane corresponding to the ground when the refrigerator is placed horizontally.

[0118] In a possible implementation manner, Figure 6 is a schematic structural diagram of a first connecting component 15 in an example of this application, and reference can be made to Figure 5 , the axial direction of the first circular joint 17 can be the vertical direction. By vertically setting the axial direction of the first circular joint, the liquid refrigerant can be more evenly distributed in the entire connecting pipe. And in the vertical direction, the gravitational effect of the liquid refrigerant helps to push the bubbles and the unfilled areas to the top of the inner cavity of the first circular joint 17, reducing the retention of bubbles in the pipeline and the formation of dead zones. This helps to maintain the continuity and stability of the refrigerant flow and further improves the heat exchange efficiency.

[0119] It can be understood that in order to achieve refrigeration, the length of the microchannel flat tube of the microchannel evaporator 33 is relatively long, for example, it can reach 13 meters.

[0120] In a possible implementation manner, Figure 7 is a schematic diagram of the microchannel flat tube of the microchannel evaporator 33 in an example of this application arranged around the side wall of the inner liner 104, as Figure 7 shown. The box body 101 further includes an inner liner 104, and the inner liner 104 is configured with a storage chamber. The microchannel flat tube of the microchannel evaporator 33 can be arranged around the circumferential side wall of the inner liner 104, Figure 7 and only part of the microchannel flat tubes are shown in

[0121] . The width direction of the second flat tube joint 18 is parallel to the side wall where it is located, so that the second flat tube joint 18 can be attached to the side wall to ensure the heat exchange effect. Figure 7 Among them, the circumferential side wall refers to the annular side wall in the inner liner 104, for example

[0122] In a possible implementation, the first micro-channel flat tube 24 near the first end b1 in the second pipeline 19 is bent, and the first end b1 is communicated with the second flat tube joint 18. Figure 8 The figure is a schematic diagram of the bending setting of the first micro-channel flat tube 24 of the second pipeline 19 in the example of this application, as Figure 8 shown, the bent micro-channel flat tube is the first micro-channel flat tube 24, Figure 8 the second end of the second pipeline 19 is not shown in the figure.

[0123] By fitting the second flat tube joint 18 with the inner tank 104, and bending and connecting a part of the micro-channel flat tube near the first end b1 of the second pipeline 19 to the second flat tube joint, the occupied space of the micro-channel evaporator 33 can be saved while ensuring the heat exchange effect.

[0124] In a possible implementation, as Figure 9 shown, the first micro-channel flat tube 24 includes a connecting portion 25 and a second micro-channel flat tube 26.

[0125] The width direction of the second micro-channel flat tube 26 is parallel to the circumferential side wall of the inner tank 104, so that the second micro-channel flat tube 26 can be fitted with the inner tank 104 to ensure the heat exchange effect. The connecting portion 25 is bent. The first end c1 of the connecting portion 25 is connected to the second flat tube joint 18, and the second end c2 of the connecting portion 25 is connected to the second micro-channel flat tube 26. It can be understood that the first end b1 of the second pipeline 19 is also the first end c1 of the connecting portion 25, Figure 9 the second end b2 of the second pipeline 19 is not shown.

[0126] While ensuring the heat exchange effect, by connecting the second micro-channel flat tube 26 of the second pipeline 19 to the second flat tube joint 18 through the connecting portion 25 and bending the connecting portion 25, it can be flexibly installed before welding the pipeline.

[0127] Regarding the understanding that the width direction of the second micro-channel flat tube 26 is parallel to the circumferential side wall of the inner tank 104, for a section of the micro-channel flat tube arranged in a certain side wall of the circumferential side wall, the width direction of this section of the micro-channel flat tube is parallel to this side wall.

[0128] 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 disposed at the middle position of the microchannel flat tube of the microchannel evaporator 33. With such a setting, the uncompletely evaporated 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. Moreover, during the process of the liquid refrigerant flowing and boiling in the pipeline and undergoing a phase change, different flow patterns are formed in the pipeline, resulting in an increase in the flow resistance. Generally, an obvious increase in resistance starts to occur at about half of the tube length of the microchannel flat tube of the microchannel evaporator 33. Installing the first gas-liquid separator 11 at the middle position of the microchannel flat tube of the microchannel evaporator 33 can reduce the pressure loss of the refrigerant in the microchannel 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 disposed can be the position where the resistance change of the refrigerant in the microchannel flat tube of the microchannel evaporator 33 is the largest.

[0129] In a possible implementation, the ratio of the length of the first pipeline 10 to the length of the microchannel flat tube of the microchannel 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 microchannel 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 disposed near the intake port of the compressor 31. With such a setting, it can be ensured that after the refrigerant flows through most of the microchannel flat tubes of the microchannel 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 microchannel evaporator 33.

[0130] In a possible implementation, the first gas-liquid separator 11 is disposed at the middle position of the microchannel flat tube of the microchannel evaporator 33, and a second gas-liquid separator 27 can also be disposed in the second pipeline 19.

[0131] Figure 10 Another structural schematic diagram of the refrigeration system 103 provided by the embodiment of the present application is as Figure 10As shown, the second pipeline 19 includes a first sub-pipeline 28 and a second sub-pipeline 29. The microchannel evaporator 33 further includes:

[0132] A second gas-liquid separator 27, having a third flat tube joint 30 communicating with the first sub-pipeline 28, a second gas distribution pipe joint 35 for discharging gas, and a second liquid distribution pipe joint 36 for discharging liquid;

[0133] A second connection assembly 37, including a second connecting pipe 38, a second circular joint 39, and a fourth flat tube joint 40 that are connected in sequence. The second connecting pipe 38 communicates with the second liquid distribution pipe joint 36.

[0134] 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.

[0135] Wherein, the setting manner of the second circular joint 39 can be the same as that of the first circular joint 17. Reference can be made to the above embodiments and will not be elaborated here.

[0136] It can be understood that Figure 10 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.

[0137] In a possible implementation manner, the length of the first sub-pipeline 28 can be the same as the length of the second sub-pipeline 29, that is, the second gas-liquid separator 27 is arranged 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 arranged can 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.

[0138] After arranging a gas-liquid separator at the middle position of the microchannel evaporator 33, a gas-liquid separator can also be arranged in the second pipeline near 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.

[0139] In a possible implementation manner, the condenser 32 can also be a microchannel heat exchanger. Exemplarily, the length of the microchannel flat tube of the microchannel heat exchanger serving as the condenser can be greater than that of the microchannel evaporator 33.

[0140] In a possible implementation manner, a gas-liquid separator can be arranged in the condenser 32 to achieve gas-liquid separation of the flowing refrigerant and improve its heat exchange efficiency.

[0141] Specifically, Figure 11 is a schematic structural diagram of another refrigeration system 103 provided by the embodiments of the present application. AsFigure 11 As shown, after the refrigerant flowing in from the previous process near the intake port of the compressor 31 is separated into gas and liquid by the gas-liquid separator, the gaseous refrigerant can flow into the next process through the gas distribution pipe joint of the gas-liquid separator, and the liquid refrigerant converges with the outlet of the condenser 32 through the liquid distribution pipe joint, and then enters the throttling device 34.

[0142] In a possible implementation, the throttling device 34 can be a capillary tube.

[0143] In a possible implementation, Figure 12 is a schematic structural diagram of another refrigeration system 103 provided by an embodiment of the present application. As Figure 12 shown, the refrigeration system 103 further includes a liquid storage tank 105, and the liquid storage tank 105 is arranged between the intake port of the compressor 31 and the second pipeline 19.

[0144] The first gas distribution pipe joint 13 is communicated with the liquid storage tank 105.

[0145] By providing the liquid storage tank 105, it is possible to prevent liquid refrigerant from entering the compressor 31. Since the space between the liquid storage tank 105 and the compressor 31 is small, the first gas distribution pipe joint 13 is connected to the liquid storage tank 105 before the intake port of the compressor 31, and enters the compressor 31 through the liquid storage tank 105, which can save the space between the compressor 31 and the liquid storage tank 105 and is convenient for processing.

[0146] In a possible implementation, a drying filter can be arranged between the throttling device 34 and the condenser 32, which can filter impurities and remove moisture from the flowing refrigerant, and improve the reliability of the operation of the refrigeration system.

[0147] In a possible implementation, as Figure 4 shown, the first gas-liquid separator 11 includes a main body structure 111, the main body structure is constructed with an internal cavity, and the internal cavity includes a gas collection cavity 112, a gas-liquid separation chamber 113 and a liquid collection cavity 114 that are sequentially communicated from top to bottom.

[0148] Among them, the first gas distribution pipe joint 13 is communicated with the gas collection cavity 112, and the first liquid distribution pipe joint 14 is communicated with the liquid collection cavity 114.

[0149] After the refrigerant enters the gas-liquid separation chamber 113 through the first flat pipe joint 12, the two-phase mixture completes gas-liquid separation under the action of gravity in the gas-liquid separation chamber 113. The gaseous refrigerant can be collected in the gas collection cavity 112 and flow out through the first gas distribution pipe joint 13, and the liquid refrigerant can settle in the liquid collection cavity 114 and flow out through the first liquid distribution pipe joint 14.

[0150] With such a setting, it is beneficial for the gas-liquid separator to separate the refrigerant mixed with two phases, facilitating the outflow of the gas and the liquid through different chambers.

[0151] 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 described 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.

[0152] For the sake of convenience of explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

[0153] In the present application, terms such as "exemplary", "in some embodiments", "in other embodiments" 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 use of the term "exemplary" is intended to present concepts in a specific manner.

[0154] In the present application, the words "of", "corresponding", "corresponding", "associated" can sometimes be used interchangeably. It should be noted that when the difference is not emphasized, the meanings they express are the same.

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 compressor, a microchannel evaporator, a throttling device and a condenser; the exhaust port of the compressor is communicated with the condenser, and the air inlet of the compressor is communicated with the microchannel evaporator; the throttling device is arranged between the microchannel evaporator and the condenser; The refrigeration system is configured to cool the storage room; Wherein, the microchannel evaporator comprises: A first pipeline is connected to the condenser through the throttling device; A first gas-liquid separator, comprising a first flat pipe joint connected to the first pipeline, a first gas distribution pipe joint for outflowing gas, and a first liquid distribution pipe joint for outflowing liquid; the first gas distribution pipe joint is connected to the air inlet of the compressor; The first connecting assembly comprises a first connecting pipe, a first circular joint and a second flat pipe joint which are connected in sequence; the first connecting pipe is connected to the first liquid dispensing pipe joint; a second pipeline, a first end of which is connected to the second flat pipe joint, and a second end of which is connected to the compressor; The inlet of the first circular joint faces downward, and the outlet of the first circular joint faces upward, so that when the refrigerant flows on the first circular joint, it will soak the first circular joint from bottom to top and enter the second pipeline.

2. The refrigerator according to claim 1, characterized in that: The axial direction of the first circular joint is the vertical direction.

3. The refrigerator according to claim 1 or 2, characterized in that: The box body further comprises an inner liner, and the inner liner is configured with the storage chamber; the microchannel evaporator is arranged around the circumferential side wall of the inner liner; the width direction of the second flat tube joint is parallel to the side wall where the second flat tube joint is located; The first microchannel flat tube in the second pipeline is bent near the first end thereof, and the first end is communicated with the second flat tube joint.

4. The refrigerator according to claim 3, characterized in that: The first microchannel flat tube includes a connecting portion and a second microchannel flat tube; The width direction of the second microchannel flat tube is parallel to the circumferential side wall of the inner tank; the connecting portion is bent, the first end of the connecting portion is connected to the second flat tube joint, and the second end of the connecting portion is connected to the second microchannel flat tube.

5. The refrigerator according to any one of claims 1 to 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 second pipeline includes a first sub-pipeline and a second sub-pipeline; the microchannel evaporator also includes: A second gas-liquid separator, comprising a third flat pipe joint connected to the first sub-pipeline, a second gas-distributing pipe joint for outflowing gas, and a second liquid-distributing pipe joint for outflowing liquid; The second connecting assembly comprises a second connecting pipe, a second circular joint and a fourth flat pipe joint which are connected in sequence; the second connecting pipe is connected to the second liquid dispensing pipe joint; Wherein, the first end of the second sub-pipeline is communicated with the fourth flat pipe joint, and the second end of the second sub-pipeline is communicated with the compressor.

7. The refrigerator according to any one of claims 1 to 4, characterized in that: The ratio of the length of the first pipeline to the length of the microchannel evaporator is within a second preset range, so that the first gas-liquid separator is disposed close to the air inlet of the compressor.

8. The refrigerator according to claim 1, characterized in that: The first gas-liquid separator comprises a main body structure, wherein the main body structure is configured with an internal chamber, wherein the internal chamber comprises a gas collecting chamber, a gas-liquid separation chamber and a liquid collecting chamber which are sequentially connected from top to bottom; Wherein, the first gas distribution pipe joint is communicated with the gas collecting chamber, and the first liquid distribution pipe joint is communicated with the liquid collecting chamber.

9. The refrigerator according to claim 1, characterized in that: The refrigeration system further comprises a liquid storage tank, which is arranged between the air inlet of the compressor and the second pipeline; The first gas distribution pipe joint is communicated with the liquid storage tank.

10. A refrigerator, characterized in that: include: A box body is constructed with a storage room; A refrigeration system arranged in the box includes a compressor, a microchannel evaporator, a throttling device and a condenser; the exhaust port of the compressor is communicated with the condenser, and the air inlet of the compressor is communicated with the microchannel evaporator; the throttling device is arranged in a pipeline between the microchannel evaporator and the condenser; The refrigeration system is configured to cool the storage room; Wherein, the microchannel evaporator comprises: A first pipeline is connected to the condenser through the throttling device; a second pipeline, which is in communication with the compressor; The gas-liquid separator disposed between the first pipeline and the second pipeline is configured to perform gas-liquid separation on the refrigerant entering the first pipeline.

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