Liquid separation device, shell and tube heat exchanger and central air conditioner

Abstract

The invention relates to the technical field of heat pumps, and provides a liquid separation device, a shell and tube heat exchanger and a central air conditioner. The invention provides a liquid separation device, a shell and tube heat exchanger and a central air conditioner. The liquid separation device is applied to the shell and tube heat exchanger. The shell and tube heat exchanger comprises a heat exchanger body. The heat exchanger body comprises a tube shell and a plurality of heat exchange tube bundles. The multiple heat exchange tube bundles are located in the tube shell and connected with the tube shell. The liquid separating device is provided with a refrigerant inlet and a plurality of first flow separating openings capable of communicating with the refrigerant inlet. The multiple first flow dividing openings communicate with inlets of the multiple heat exchange tube bundles in a one-to-one correspondence mode when the liquid dividing device is connected to the tube shell. Compared with the prior art, the liquid separation device has the advantages that the edges of the multiple flow separation openings of the liquid separation head do not need to be welded to the inlet ends of the multiple heat exchange tube bundles in a one-to-one correspondence mode, the connecting difficulty can be lowered, the connecting quality can be improved, and the connecting strength between the liquid separation device and the shell and tube heat exchanger is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pumps, and particularly to a liquid distribution device, a shell-and-tube heat exchanger, and a central air conditioner. Background Art

[0002] As a heat energy exchange device, the shell-and-tube heat exchanger has been widely used in the central air conditioner unit. The shell-and-tube heat exchanger can enable two fluids to transfer and exchange heat.

[0003] In the prior art, the shell-and-tube heat exchanger includes a heat exchanger main body and a liquid distribution head. The heat exchanger main body includes a shell and a plurality of heat exchange tube bundles disposed in the shell. The liquid distribution head has a refrigerant inlet and a plurality of diversion ports. The peripheries of the plurality of diversion ports of the liquid distribution head are welded to the peripheries of the inlets of the plurality of heat exchange tube bundles one by one, so that the plurality of diversion ports are connected to the inlets of the plurality of heat exchange tube bundles one by one. Thus, when the refrigerant enters from the refrigerant inlet, the refrigerant will flow out from the plurality of diversion ports to achieve diversion.

[0004] However, the distance between two adjacent diversion ports is relatively close, and the space is small. Therefore, not only the welding difficulty is large, but also the welding quality is affected because the welding points are too close during welding. Summary of the Invention

[0005] The present invention provides a liquid distribution device, a shell-and-tube heat exchanger, and a central air conditioner to solve the technical problems of large welding difficulty and poor welding quality caused by the relatively close distance between two adjacent diversion ports in the prior art.

[0006] The present invention provides a liquid distribution device, which is applied to a shell-and-tube heat exchanger. The shell-and-tube heat exchanger includes a heat exchanger main body. The heat exchanger main body includes a shell and a plurality of heat exchange tube bundles. The plurality of heat exchange tube bundles are disposed in the shell and connected to the shell. The liquid distribution device has a refrigerant inlet and a plurality of first diversion ports that can communicate with the refrigerant inlet. The plurality of first diversion ports are connected to the inlets of the plurality of heat exchange tube bundles one by one in the state where the liquid distribution device is connected to the shell.

[0007] According to an embodiment of the present invention, the liquid distribution device includes a liquid distribution main body and a liquid distribution unit. The liquid distribution main body has a first end and a second end along its axial direction. The liquid distribution main body has a first cavity. The first cavity penetrates through the first end and the second end. The second end is connected to the end of the shell. The liquid distribution unit is located in the first cavity and connected to the cavity wall of the first cavity. The refrigerant inlet and the first diversion ports are provided on the liquid distribution unit.

[0008] According to an embodiment of the present invention, the liquid distribution unit includes a refrigerant inlet component and a liquid distribution component. The refrigerant inlet component is disposed in the first cavity and located at the first end. The refrigerant inlet is provided on the refrigerant inlet component. The liquid distribution component is disposed in the first cavity and located at the second end, and is hermetically connected to the periphery of the first cavity.

[0009] According to an embodiment of the present invention, the liquid separation component includes a first liquid separation plate; the first liquid separation plate is located at the second end, the peripheral edge of the first liquid separation plate is sealingly connected to the peripheral wall of the first chamber, and the first diversion port is located on the first liquid separation plate.

[0010] According to an embodiment of the present invention, the liquid separation component further includes a second liquid separation plate; the second liquid separation plate is located between the first end and the second end, there is a spacing between the second liquid separation plate and the first liquid separation plate, the peripheral edge of the second liquid separation plate is sealingly connected to the peripheral wall of the first chamber, and the second liquid separation plate has a second diversion port; the first diversion port and the second diversion port are arranged staggeredly along the direction from the first end to the second end.

[0011] According to an embodiment of the present invention, the second liquid separation plate is slidably connected to the liquid separation main body along a first direction, and the second liquid separation plate has a first region and a second region along the first direction; the first direction is perpendicular to the direction from the first end to the second end; both the first region and the second region have second diversion ports, and the aperture of the second diversion port in the first region is different from the aperture of the second diversion port in the second region; the second liquid separation plate can be switched between a first position and a second position by sliding connection; in the state where the second liquid separation plate is located at the first position, the refrigerant inlet is communicated with the inlet of the heat exchange tube bundle through the second diversion port in the first region and the first diversion port in sequence; in the state where the second liquid separation plate is located at the second position, the refrigerant inlet is communicated with the inlet of the heat exchange tube bundle through the second diversion port in the second region and the first diversion port in sequence.

[0012] According to an embodiment of the present invention, in the state where the first liquid separation plate is located at the second end, a first groove is formed between the first liquid separation plate and the chamber wall of the first chamber; in the state where the refrigerant inlet component is located at the first end, a second groove is formed between the refrigerant inlet component and the chamber wall of the first chamber.

[0013] According to an embodiment of the present invention, the liquid separation main body has a second chamber; the second chamber penetrates through the first end and the second end; the liquid separation device further includes a refrigerant discharge unit; the refrigerant discharge unit is located in the second chamber, the peripheral edge of the refrigerant discharge unit is connected to the chamber wall of the second chamber, the peripheral edge of the refrigerant discharge unit is sealingly fitted with the peripheral wall of the second chamber, and the refrigerant discharge unit has a refrigerant outlet; the outlets of a plurality of heat exchange tube bundles are located in the second chamber.

[0014] The present invention also provides a shell-and-tube heat exchanger, including: a heat exchanger main body; the liquid separation device according to the above embodiment, connected to the heat exchanger main body.

[0015] The present invention also provides a central air conditioner, including: a main unit, including the shell-and-tube heat exchanger according to the above embodiment; a central air conditioner terminal, connected to the main unit.

[0016] The features and advantages of the liquid separation device, shell-and-tube heat exchanger and central air conditioner of the present invention are:

[0017] In a state where the liquid separation device is connected to the shell, a plurality of first flow splitting ports are in one-to-one correspondence and communication with the inlets of a plurality of heat exchange tube bundles. That is, as long as the liquid separation device is connected to the shell, a plurality of flow splitting ports (first flow splitting ports) can be in one-to-one correspondence and communication with the inlets of a plurality of heat exchange tube bundles. Compared with the prior art, it is not necessary to weld the edges of the plurality of flow splitting ports of the liquid separation head to the inlet ends of the plurality of heat exchange tube bundles one by one, which can reduce the connection difficulty and improve the connection quality to ensure the connection strength between the liquid separation device and the shell-and-tube heat exchanger, and there is no need to weld copper tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a perspective view of the shell-and-tube heat exchanger of the present invention.

[0020] Figure 2 is an exploded view of the shell-and-tube heat exchanger of the present invention.

[0021] Figure 3 is an exploded view of the liquid separation device of the present invention from one angle.

[0022] Figure 4 is an exploded view of the liquid separation device of the present invention from another angle.

[0023] REFERENCE NUMERALS:

[0024] 100, liquid separation device; 110, liquid separation main body; 111, first end; 112, second end; 113, first chamber; 114, second chamber; 120, liquid separation unit; 121, refrigerant inlet component; 1211, refrigerant inlet; 122, liquid separation component; 1221, first liquid separation plate; 1220, first flow splitting port; 1222, second liquid separation plate; 1200, second flow splitting port; 130, refrigerant discharge unit; 131, refrigerant outlet; 200, heat exchanger main body; 210, shell; 220, heat exchange tube bundle; F, first direction. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0026] In the description of this embodiment, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this embodiment 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 should not be construed as a limitation on this embodiment.

[0027] In addition, 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 at least one of such features. In the description of this embodiment, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this embodiment, unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; 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 or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] Figures 1 to 4The liquid separation device 100, shell-and-tube heat exchanger, and central air conditioner provided by the present invention are shown. It can be seen from the figure that the liquid separation device 100 of the present invention is applied to the shell-and-tube heat exchanger; the shell-and-tube heat exchanger includes a heat exchanger main body 200; the heat exchanger main body 200 includes a shell 210 and a plurality of heat exchange tube bundles 220; the plurality of heat exchange tube bundles 220 are located inside the shell 210 and are connected to the shell 210; the liquid separation device 100 has a refrigerant inlet 1211 and a plurality of first diversion ports 1220 that can communicate with the refrigerant inlet 1211; when the liquid separation device 100 is connected to the shell 210, the plurality of first diversion ports 1220 are in one-to-one correspondence with the inlets of the plurality of heat exchange tube bundles 220.

[0031] During specific implementation, when the liquid separation device 100 is connected to the shell 210, the plurality of first diversion ports 1220 are in one-to-one correspondence with the inlets of the plurality of heat exchange tube bundles 220. That is, as long as the liquid separation device 100 is connected to the shell 210, the plurality of diversion ports (first diversion ports 1220) can be in one-to-one correspondence with the inlets of the plurality of heat exchange tube bundles 220. Compared with the prior art, it is not necessary to weld the edges of the plurality of diversion ports of the liquid separation head to the inlet ends of the plurality of heat exchange tube bundles 220 one by one, which can reduce the connection difficulty and improve the connection quality to ensure the connection strength between the liquid separation device 100 and the shell-and-tube heat exchanger without welding.

[0032] In this embodiment, the heat exchange tube bundle 220 can be a copper tube, and the copper tube can be in a "U" shape. The heat exchange tube bundle 220 can also be called a hairpin tube. The refrigerant can enter from one end of the heat exchange tube bundle 220 through the liquid separation device 100 and then flow out from the other end of the heat exchange tube bundle 220.

[0033] According to an embodiment of the present invention, the liquid separation device 100 can include a liquid separation main body 110 and a liquid separation unit 120; the liquid separation main body 110 has a first end 111 and a second end 112 along its axial direction, and the liquid separation main body 110 has a first chamber 113 (or can be called a diversion chamber); the first chamber 113 penetrates through the first end 111 and the second end 112; the second end 112 is connected to the end of the shell 210; the liquid separation unit 120 is located inside the first chamber 113 and is connected to the chamber wall of the first chamber 113; the refrigerant inlet 1211 and the first diversion ports 1220 are provided on the liquid separation unit 120.

[0034] During specific implementation, after the refrigerant enters the first chamber 113 of the liquid separation main body 110 from the refrigerant inlet 1211 of the liquid separation unit 120, it then flows from the plurality of first diversion ports 1220 to the inlets of the plurality of heat exchange tube bundles 220 to achieve diversion.

[0035] According to an embodiment of the present invention, the liquid separation unit 120 may include a refrigerant inlet component 121 and a liquid separation component 122; the refrigerant inlet component 121 is disposed in the first chamber 113 and located at the first end 111; a refrigerant inlet 1211 is provided on the refrigerant inlet component 121; the liquid separation component 122 is disposed in the first chamber 113 and located at the second end 112, and is hermetically connected to the peripheral edge of the first chamber 113.

[0036] In specific implementation, after the refrigerant enters the first chamber 113 of the liquid separation main body 110 through the refrigerant inlet 1211 of the refrigerant inlet component 121 at the first end 111 of the liquid separation main body 110, it then flows from the plurality of first diversion ports 1220 of the liquid separation unit 120 to the inlets of the plurality of heat exchange tube bundles 220 to achieve diversion.

[0037] According to an embodiment of the present invention, the liquid separation component 122 may include a first liquid separation plate 1221 (or may be called a rear diversion plate); the first liquid separation plate 1221 is located at the second end 112, the peripheral edge of the first liquid separation plate 1221 is hermetically connected to the peripheral wall of the first chamber 113, and the first diversion ports 1220 are located on the first liquid separation plate 1221.

[0038] In specific implementation, after the refrigerant enters the first chamber 113 of the liquid separation main body 110 through the refrigerant inlet 1211 of the refrigerant inlet component 121 at the first end 111 of the liquid separation main body 110, it then flows from the plurality of first diversion ports 1220 of the first liquid separation plate 1221 to the inlets of the plurality of heat exchange tube bundles 220 to achieve diversion.

[0039] According to an embodiment of the present invention, the liquid separation component 122 may further include a second liquid separation plate 1222 (or may be called a middle diversion plate); the second liquid separation plate 1222 is located between the first end 111 and the second end 112, there is a spacing between the second liquid separation plate 1222 and the first liquid separation plate 1221, the peripheral edge of the second liquid separation plate 1222 is hermetically connected to the peripheral wall of the first chamber 113, the second liquid separation plate 1222 has second diversion ports 1200; the first diversion ports 1220 and the second diversion ports 1200 are staggeredly arranged along the direction from the first end 111 to the second end 112.

[0040] During specific implementation, the refrigerant enters the first cavity 113 of the liquid separation main body 110 from the refrigerant inlet 1211 of the refrigerant inlet component 121 at the first end 111 of the liquid separation main body 110. Then, it is divided from the multiple second diversion openings 1200 of the second liquid separation plate 1222 into the cavity between the second liquid separation plate 1222 and the first liquid separation plate 1221. After entering the cavity, it then flows out from the multiple first diversion openings 1220 of the first liquid separation plate 1221. Since the flow rates of the refrigerant flowing out from the multiple second diversion openings 1200 are not exactly the same, through the above structural arrangement, the refrigerant can be mixed through the cavity. After the refrigerant is mixed in the cavity, it is then redistributed through the first diversion openings 1220 to make the liquid separation of the refrigerant more uniform.

[0041] It can be understood that if the first diversion openings 1220 and the second diversion openings 1200 are not staggered, the refrigerant will basically not undergo the above-mentioned redistribution, and thus, the liquid separation of the refrigerant cannot be made more uniform.

[0042] In this embodiment, the diameter of the second diversion openings 1200 is twice the diameter of the first diversion openings 1220, and the diameter of the second diversion openings 1200 can be between 2.5 mm and 6 mm to make the liquid separation of the refrigerant more uniform.

[0043] According to an embodiment of the present invention, the second liquid separation plate 1222 is slidably connected to the liquid separation main body 110 along the first direction F. The second liquid separation plate 1222 has a first region and a second region along the first direction F; the first direction F is perpendicular to the direction from the first end 111 to the second end 112; both the first region and the second region have second diversion openings 1200, and the aperture diameters of the second diversion openings 1200 in the first region are different from the aperture diameters of the second diversion openings 1200 in the second region; the second liquid separation plate 1222 can be switched between a first position and a second position by being slidably connected; in the state where the second liquid separation plate 1222 is located at the first position, the refrigerant inlet 1211 is communicated with the inlet of the heat exchange tube bundle 220 through the second diversion openings 1200 and the first diversion openings 1220 in the first region in sequence; in the state where the second liquid separation plate 1222 is located at the second position, the refrigerant inlet 1211 is communicated with the inlet of the heat exchange tube bundle 220 through the second diversion openings 1200 and the first diversion openings 1220 in the second region in sequence.

[0044] During specific implementation, through the above structural arrangement, the adjustment of the aperture diameter of the second diversion openings 1200 can be achieved by sliding the second liquid separation plate 1222, without the need to replace the entire liquid separation plate (the second liquid separation plate 1222). That is to say, the second liquid separation plate 1222 has two working positions or working states.

[0045] According to an embodiment of the present invention, when the first liquid separation plate 1221 is located at the second end 112, a first groove is formed between the first liquid separation plate 1221 and the cavity wall of the first cavity 113; when the refrigerant inlet member 121 is located at the first end 111, a second groove is formed between the refrigerant inlet member 121 and the cavity wall of the first cavity 113.

[0046] During specific implementation, through the above structural arrangement, it is convenient to weld the first liquid separation plate 1221 and the liquid separation main body 110, as well as the refrigerant inlet member 121 and the liquid separation main body 110.

[0047] According to an embodiment of the present invention, the liquid separation main body 110 has a second cavity 114 (or can be called a mixing cavity); the second cavity 114 penetrates through the first end 111 and the second end 112; the liquid separation device 100 may further include a refrigerant discharge unit 130; the refrigerant discharge unit 130 is located in the second cavity 114, the periphery of the refrigerant discharge unit 130 is connected to the cavity wall of the second cavity 114, the periphery of the refrigerant discharge unit 130 is in sealing cooperation with the peripheral wall of the second cavity 114, the refrigerant discharge unit 130 has a refrigerant outlet 131; the outlets of the plurality of heat exchange tube bundles 220 are located in the second cavity 114.

[0048] During specific implementation, after the refrigerant enters the first cavity 113 of the liquid separation main body 110 from the refrigerant inlet 1211 of the liquid separation unit 120, it then flows from the plurality of first diversion ports 1220 to the inlets of the plurality of heat exchange tube bundles 220. After heat exchange through the inlets of the plurality of heat exchange tube bundles 220 and entering the plurality of heat exchange tube bundles 220, it flows from the outlets of the plurality of heat exchange tube bundles 220 to the second cavity 114, converges and mixes in the second cavity 114, and then flows out uniformly from the refrigerant outlet 131 of the refrigerant discharge unit 130.

[0049] The present invention also provides a shell-and-tube heat exchanger, which may include a heat exchanger main body 200 and the liquid separation device 100 of the above embodiment, and the liquid separation device 100 is connected to the heat exchanger main body 200.

[0050] During specific implementation, when the liquid separation device 100 is connected to the tube shell 210, the plurality of first diversion ports 1220 are in one-to-one correspondence and communication with the inlets of the plurality of heat exchange tube bundles 220. That is, as long as the liquid separation device 100 is connected to the tube shell 210, the plurality of diversion ports (first diversion ports 1220) can be in one-to-one correspondence and communication with the inlets of the plurality of heat exchange tube bundles 220. Compared with the prior art, it is not necessary to weld the edges of the plurality of diversion ports of the liquid separation head to the inlet ends of the plurality of heat exchange tube bundles one by one, which can reduce the connection difficulty and improve the connection quality to ensure the connection strength between the liquid separation device 100 and the shell-and-tube heat exchanger, and there is no need to weld copper tubes.

[0051] The present invention also provides a central air conditioner, which includes a main unit and an end of the central air conditioner. The main unit includes the shell-and-tube heat exchanger of the above-described embodiment; the end of the central air conditioner is connected to the main unit.

[0052] During specific implementation, in a state where the liquid distribution device 100 is connected to the shell 210, a plurality of first diversion ports 1220 are in one-to-one correspondence and communication with the inlets of a plurality of heat exchange tube bundles 220. That is to say, as long as the liquid distribution device 100 is connected to the shell 210, a plurality of diversion ports (first diversion ports 1220) can be in one-to-one correspondence and communication with the inlets of a plurality of heat exchange tube bundles 220. Compared with the prior art, it is not necessary to weld the edges of a plurality of diversion ports of the liquid distribution head to the inlet ends of a plurality of heat exchange tube bundles 220 one by one, which can reduce the connection difficulty and improve the connection quality to ensure the connection strength between the liquid distribution device 100 and the shell-and-tube heat exchanger, and there is no need to weld copper tubes.

[0053] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or mode are included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or modes in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or modes described in this specification and the features of different embodiments or modes.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention 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 for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid separation device, characterized in that, the liquid separation device is applied to a shell-and-tube heat exchanger; the shell-and-tube heat exchanger includes a heat exchanger main body (200); the heat exchanger main body (200) includes a shell (210) and a plurality of heat exchange tube bundles (220); the plurality of heat exchange tube bundles (220) are located inside the shell (210) and are connected to the shell (210); the liquid separation device has a refrigerant inlet (1211) and a plurality of first shunt ports (1220) that can communicate with the refrigerant inlet (1211); in a state where the liquid separation device is connected to the shell (210), the plurality of first shunt ports (1220) are in one-to-one correspondence with the inlets of the plurality of heat exchange tube bundles (220).

2. The liquid separation device according to claim 1, characterized in that, the liquid separation device includes a liquid separation main body (110) and a liquid separation unit (120); the liquid separation main body (110) has a first end (111) and a second end (112) along its axial direction, and the liquid separation main body (110) has a first cavity (113); the first cavity (113) penetrates the first end (111) and the second end (112); the second end (112) is connected to the end of the shell (210); the liquid separation unit (120) is located inside the first cavity (113) and is connected to the cavity wall of the first cavity (113); the refrigerant inlet (1211) and the first shunt ports (1220) are provided on the liquid separation unit (120).

3. The liquid separation device according to claim 2, characterized in that, the liquid separation unit (120) includes a refrigerant inlet component (121) and a liquid separation component (122); the refrigerant inlet component (121) is provided inside the first cavity (113) and is located at the first end (111); the refrigerant inlet (1211) is provided on the refrigerant inlet component (121); the liquid separation component (122) is provided inside the first cavity (113) and is located at the second end (112), and is hermetically connected to the periphery of the first cavity (113).

4. The liquid separation device according to claim 3, characterized in that, the liquid separation component (122) includes a first liquid separation plate (1221); the first liquid separation plate (1221) is located at the second end (112), the periphery of the first liquid separation plate (1221) is hermetically connected to the peripheral wall of the first cavity (113), and the first shunt ports (1220) are located on the first liquid separation plate (1221).

5. The liquid separation device according to claim 4, characterized in that, the liquid separation component (122) further includes a second liquid separation plate (1222); the second liquid separation plate (1222) is located between the first end (111) and the second end (112), there is a distance between the second liquid separation plate (1222) and the first liquid separation plate (1221), the periphery of the second liquid separation plate (1222) is hermetically connected to the peripheral wall of the first cavity (113), and the second liquid separation plate (1222) has second shunt ports (1200); The first diversion port (1220) and the second diversion port (1200) are arranged offset in the direction from the first end (111) to the second end (112).

6. The liquid separation device according to claim 5, wherein, the second liquid separation plate (1222) is slidably connected to the liquid separation main body (110) along a first direction (F), and the second liquid separation plate (1222) has a first region and a second region along the first direction (F); the first direction (F) is perpendicular to the direction from the first end (111) to the second end (112); both the first region and the second region have the second diversion port (1200), and the aperture of the second diversion port (1200) in the first region is different from the aperture of the second diversion port (1200) in the second region; the second liquid separation plate (1222) switches between a first position and a second position through the slidable connection; in a state where the second liquid separation plate (1222) is located at the first position, the refrigerant inlet (1211) communicates with the inlet of the heat exchange tube bundle (220) through the second diversion port (1200) in the first region and the first diversion port (1220) in sequence; in a state where the second liquid separation plate (1222) is located at the second position, the refrigerant inlet (1211) communicates with the inlet of the heat exchange tube bundle (220) through the second diversion port (1200) in the second region and the first diversion port (1220) in sequence.

7. The liquid separation device according to claim 4, wherein, in a state where the first liquid separation plate (1221) is located at the second end (112), a first bevel groove is formed between the first liquid separation plate (1221) and the cavity wall of the first cavity (113); in a state where the refrigerant inlet component (121) is located at the first end (111), a second bevel groove is formed between the refrigerant inlet component (121) and the cavity wall of the first cavity (113).

8. The liquid separation device according to any one of claims 2 to 7, wherein, the liquid separation main body (110) has a second cavity (114); the second cavity (114) penetrates through the first end (111) and the second end (112); the liquid separation device further includes a refrigerant discharge unit (130); the refrigerant discharge unit (130) is located in the second cavity (114), the periphery of the refrigerant discharge unit (130) is connected to the cavity wall of the second cavity (114), the periphery of the refrigerant discharge unit (130) is in sealing cooperation with the peripheral wall of the second cavity (114), and the refrigerant discharge unit (130) has a refrigerant outlet (131); the outlets of multiple heat exchange tube bundles (220) are located in the second cavity (114).

9. A shell-and-tube heat exchanger, wherein, it includes: a heat exchanger main body (200); the liquid separation device according to any one of claims 1 to 8, connected to the heat exchanger main body (200).

10. A central air conditioner, wherein, it includes: The main unit includes a shell-and-tube heat exchanger as described in Claim 9; The central air-conditioning terminal is connected to the main unit.

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