Gas-liquid separator and air conditioning system

Abstract

The present disclosure relates to a gas-liquid separator and an air conditioning system. The gas-liquid separator comprises: a shell (10) having an internal cavity (11); an exhaust pipe (20) having an air intake end (21) inserted into the internal cavity (11); and a throttling adjustment mechanism, which is arranged in the internal cavity (11) and is configured to adjust the throttling area of ​​the air intake end (21) according to the liquid level of the liquid refrigerant in the internal cavity (11). The embodiments of the present disclosure can reduce the amount of liquid refrigerant entering the compressor from the gas-liquid separator, thereby reducing the risk of liquid hammer in the compressor.

Description

Technical Field

[0001] The present disclosure relates to the field of refrigerant processing, and in particular to a gas-liquid separator and an air-conditioning system. Background Art

[0002] In the air conditioning system, the gaseous refrigerant discharged from the compressor releases heat and condenses in the condenser. After passing through the throttling unit, the liquid refrigerant absorbs heat and evaporates in the evaporator, and this reciprocating cycle achieves the purpose of cooling or heating. The operating temperature range of the air conditioning system is relatively wide. When heating under low temperature conditions, the evaporation capacity of the evaporator is too attenuated, and the liquid refrigerant cannot be fully evaporated, resulting in a large amount of liquid refrigerant returning to the suction end of the compressor, which is easy to cause risks such as compressor liquid hammer. In order to minimize this risk, the air conditioning system stores the two-phase refrigerant on the evaporation side by setting a gas-liquid separator to prevent the air conditioner from running with liquid.

[0003] The gas-liquid separator of a single air conditioner can effectively prevent the compressor from running with liquid, but for multi-split air conditioning systems, modular matching has become the norm. When air conditioner outdoor units of different capacities are operated in parallel, the entire system runs with a large amount of refrigerant. When the refrigerant migrates or runs at low temperatures, it is easy for the gas-liquid separator in the small-capacity multi-split module to be full of liquid, causing the compressor to run with liquid. In some related technologies, a liquid balance pipe is set between the gas-liquid separators of different multi-split modules to balance the amount of liquid refrigerant in the gas-liquid separator. Summary of the invention

[0004] The inventors have discovered through research that, since the capacities of the gas-liquid separators in different multi-unit modules in the related technology may vary greatly, the liquid balance pipe cannot prevent the refrigerant in the smaller-capacity gas-liquid separator from being full of liquid, which can easily lead to liquid shock damage to the compressor in the multi-unit module corresponding to the smaller-capacity gas-liquid separator.

[0005] In view of this, the embodiments of the present disclosure provide a gas-liquid separator and an air-conditioning system, which can reduce the amount of liquid refrigerant entering the compressor from the gas-liquid separator and reduce the risk of liquid hammer in the compressor.

[0006] In one aspect of the present disclosure, there is provided a gas-liquid separator, comprising:

[0007] a housing having an interior cavity;

[0008] an exhaust pipe having an air intake end portion inserted into the interior cavity; and

[0009] The throttling adjustment mechanism is disposed in the internal cavity and is configured to adjust the throttling area of ​​the suction end according to the liquid level of the liquid refrigerant in the internal cavity.

[0010] In some embodiments, the throttling adjustment mechanism is configured to reduce the throttling area of ​​the suction end when the liquid level of the liquid refrigerant in the internal cavity reaches the height position where the suction end is located.

[0011] In some embodiments, the throttling adjustment mechanism includes:

[0012] The floating plate floats on the liquid surface of the liquid refrigerant in the internal cavity and rises and falls with the liquid level of the liquid refrigerant in the internal cavity.

[0013] The floating plate has a throttling structure, and the throttling structure is configured to form a throttling effect on the suction end when the liquid level of the liquid refrigerant in the internal cavity reaches the height position where the suction end is located.

[0014] In some embodiments, the throttling structure is a flow channel arranged in the floating plate, the cross-sectional area of ​​the flow channel is smaller than the cross-sectional area of ​​the opening of the intake end, and the throttling structure is configured to contact the intake end when the liquid level of the liquid refrigerant in the internal cavity reaches the height position where the intake end is located.

[0015] In some embodiments, the flow channel penetrates the floating plate in a vertical direction of the upper surface of the floating plate, the opening of the suction end is set downward, and the projection on the upper surface of the floating plate coincides with the flow channel opening portion of the flow channel on the upper surface of the floating plate.

[0016] In some embodiments, the throttling adjustment mechanism further includes:

[0017] The guide structure is connected to the floating plate and is configured to guide the rising movement of the floating plate when the liquid level of the liquid refrigerant in the internal cavity rises to the height position where the intake end is located, so that the throttling structure is in close contact with the intake end when the liquid level of the liquid refrigerant in the internal cavity reaches the height position where the intake end is located.

[0018] In some embodiments, the guide structure comprises:

[0019] At least two guide rails are arranged on the inner wall of the housing in a vertical direction.

[0020] Wherein, at least two parts of the floating sheet are slidably connected to the at least two guide rails respectively.

[0021] In some embodiments, the at least two guide rails have a limiting structure, and the limiting structure is configured to limit the highest rising position and the lowest descending position of the floating sheet.

[0022] In some embodiments, the gas-liquid separator further comprises:

[0023] An air inlet pipe, connected to the internal cavity and having an air inlet end portion with an opening facing downward;

[0024] Among them, the height position of the intake end of the intake pipe is lower than the height position of the intake end, and the floating plate has a first through hole penetrating the floating plate in a vertical direction along the upper surface of the floating plate, and the projection of the intake end on the upper surface of the floating plate is located in the first through hole, so that when the liquid level of the liquid refrigerant in the internal cavity reaches the height position of the intake end, the intake end passes through the first through hole.

[0025] In some embodiments, the exhaust pipe also has a U-shaped bend portion located in the internal cavity, the non-closed section of the U-shaped bend portion is arranged upward, the floating plate has a second through hole penetrating the floating plate in a vertical direction along the upper surface of the floating plate, and the projection of the U-shaped bend portion on the upper surface of the floating plate is located in the second through hole, so that when the liquid level of the liquid refrigerant in the internal cavity changes, the U-shaped bend portion always passes through the second through hole.

[0026] In some embodiments, the floating sheet is in a plate shape and has a continuous or separated cavity structure inside.

[0027] In one aspect of the present disclosure, an air conditioning system is provided, comprising: the aforementioned gas-liquid separator.

[0028] In some embodiments, the air conditioning system is a multi-split air conditioning system.

[0029] Therefore, according to the embodiment of the present disclosure, a throttling adjustment mechanism is provided in the internal cavity of the shell, so that the throttling adjustment mechanism adjusts the throttling area of ​​the suction end of the exhaust pipe according to the liquid level of the liquid refrigerant in the internal cavity, so that the exhaust pipe can adjust the flow rate of the liquid refrigerant discharged through the exhaust pipe according to the change of the liquid refrigerant level, and control the amount of liquid refrigerant sucked into the compressor when the gas-liquid separator is full of liquid, thereby reducing the amount of liquid refrigerant entering the compressor from the gas-liquid separator and reducing the risk of liquid hammer in the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0031] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0032] Figure 1 is a schematic structural diagram of some embodiments of the gas-liquid separator according to the present disclosure;

[0033] Figure 2 and Figure 3 They are schematic diagrams of the structures of the floating plates in different viewing angles according to some embodiments of the gas-liquid separator disclosed herein;

[0034] Figure 4 It is a schematic diagram of a local state when the liquid level of the liquid refrigerant reaches the height position where the suction end is located according to some embodiments of the gas-liquid separator disclosed in the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of some embodiments of the air-conditioning system according to the present disclosure.

[0036] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0038] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0040] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0041] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0042] Figure 1 It is a schematic structural diagram of some embodiments of the gas-liquid separator according to the present disclosure. Figure 2 and Figure 3 They are schematic diagrams of the structures of the floating plates in some embodiments of the gas-liquid separator according to the present disclosure at different viewing angles. Figure 4 It is a schematic diagram of the local state when the liquid level of the liquid refrigerant reaches the height position where the suction end is located in some embodiments of the gas-liquid separator disclosed in the present invention.

[0043] refer to Figure 1-Figure 4 The embodiment of the present disclosure provides a gas-liquid separator, comprising: a shell 10, an exhaust pipe 20 and a throttling adjustment mechanism. The shell 10 has an internal cavity 11, and the internal cavity 11 can be surrounded by the bottom, the top and the circumferential side wall of the shell 10. The exhaust pipe 20 has an air intake end 21 inserted into the internal cavity 11. The portion of the exhaust pipe 20 located outside the shell 10 can be connected to other equipment, such as a compressor, so as to discharge the separated gaseous refrigerant to the compressor.

[0044] The throttling adjustment mechanism is disposed in the internal cavity 11 and is configured to adjust the flow rate according to the liquid refrigerant Q (reference Figure 1 ) adjusts the throttling area of ​​the suction end 21 according to the liquid level of the liquid refrigerant. The throttling adjustment mechanism enables the exhaust pipe to adjust the flow rate of the liquid refrigerant discharged through the exhaust pipe according to the change of the liquid refrigerant level, and controls the amount of liquid refrigerant sucked into the compressor when the gas-liquid separator is full of liquid, thereby reducing the amount of liquid refrigerant entering the compressor from the gas-liquid separator and reducing the risk of compressor liquid hammer.

[0045] In some embodiments, the throttling adjustment mechanism is configured to reduce the throttling area of ​​the suction end 21 when the liquid level of the liquid refrigerant in the internal cavity 11 reaches the height position of the suction end 21. In this way, when the liquid refrigerant reaches the height position of the suction end 21, the suction end 21 directly contacts the liquid refrigerant, thereby sucking out the liquid refrigerant, and the throttling adjustment mechanism reduces the amount of sucked out liquid refrigerant by controlling the throttling area of ​​the suction end 21, thereby reducing the amount of liquid refrigerant entering the compressor from the gas-liquid separator and reducing the risk of compressor liquid hammer.

[0046] The throttling adjustment mechanism can be implemented in various forms, for example, the liquid level of the liquid refrigerant is sensed by a sensing element, and throttling control is implemented according to the position of the liquid level by a valve plate arranged at the suction end 21.

[0047] In order to improve the reliability of the throttling adjustment mechanism and reduce the complexity of the structure and control, refer to Figure 1-Figure 4 In some embodiments, the throttling adjustment mechanism includes: a floating plate 30. The floating plate 30 floats on the liquid surface of the liquid refrigerant in the internal cavity 11, and rises and falls with the rise and fall of the liquid level of the liquid refrigerant in the internal cavity 11. In order to enable the floating plate 30 to float on the liquid surface of the liquid refrigerant, the density of the floating plate 30 can be made smaller than the density of the liquid refrigerant, for example, the floating plate is made of a light material (such as a wood material), or a hollow floating plate structure can be used.

[0048] For example, the floating sheet may be in the form of a plate, and have a continuous or separated cavity structure inside. The cavity structure may be a vacuum, or may be filled with air or other lighter substances.

[0049] The floating plate 30 has a throttling structure, and the throttling structure is configured to form a throttling effect on the suction end 21 when the liquid level of the liquid refrigerant in the internal cavity 11 reaches the height position where the suction end 21 is located. In this way, the physical properties of the floating plate 30 itself can realize the sensing of the liquid surface position and the throttling effect when the liquid level reaches the height position where the suction end is located, thereby greatly improving the reliability of the throttling adjustment mechanism and reducing the complexity of the structure and control.

[0050] exist Figure 1-Figure 4 In the embodiment, the throttling structure is a flow channel 32 disposed in the floating plate 30. Figure 4 The cross-sectional area of ​​the flow channel 32 is smaller than the cross-sectional area of ​​the opening of the intake end 21, and the throttling structure is configured to contact the intake end 21 when the liquid level of the liquid refrigerant in the internal cavity 11 reaches the height position where the intake end 21 is located.

[0051] In this way, when the liquid level of the liquid refrigerant reaches the height position where the intake end 21 is located, the flow channel 32 contacts the intake end 21, so that the intake end 21 is connected to the liquid refrigerant through the flow channel 32, and the liquid refrigerant flowing through the flow channel 32 achieves a throttling effect when flowing through the flow channel 32 with a smaller cross-sectional area, thereby reducing the flow rate of the liquid refrigerant flowing into the intake end 21.

[0052] refer to Figure 1 and Figure 4 In some embodiments, the flow channel 32 penetrates the floating plate 30 in a vertical direction of the upper surface of the floating plate 30, the opening of the air intake end 21 is set downward, and the projection on the upper surface of the floating plate 30 partially overlaps with the flow channel opening of the flow channel 32 on the upper surface of the floating plate 30. This partial overlap relationship can be that the opening of the air intake end completely covers the flow channel opening of the flow channel 32, and the uncovered part is blocked by the floating plate surface outside the flow channel 32, or a part of the opening of the air intake end covers a part of the flow channel opening of the flow channel 32. In this way, after the floating plate 30 contacts the air intake end 21 upward, the liquid refrigerant below the floating plate 30 enters the air intake end 21 through the throttling effect of the flow channel 32.

[0053] In some embodiments, the end face of the opening of the intake end 21 can be made parallel to the surface of the floating plate 30 corresponding to the position of the flow channel opening, so that the two can maintain close contact when they come into contact under the floating effect of the liquid refrigerant, thereby reducing or eliminating the liquid refrigerant that has not been throttled by the flow channel 32 from entering the intake end 21.

[0054] Considering that the liquid level of the liquid refrigerant may fluctuate when it rises in the shell 10, thus affecting the stability of the floating plate 30 during the floating process. Figure 1 In some embodiments, the throttling adjustment mechanism further includes: a guide structure connected to the floating plate 30. The guide structure can guide the upward movement of the floating plate 30 in the process of the liquid level of the liquid refrigerant in the internal cavity 11 rising to the height position where the suction end 21 is located, so that the throttling structure is in close contact with the suction end 21 when the liquid level of the liquid refrigerant in the internal cavity 11 reaches the height position where the suction end 21 is located. The throttling structure is in close contact with the suction end 21, thereby reducing or eliminating the liquid refrigerant that has not been throttled by the flow channel 32 from entering the suction end 21. In some embodiments, a sealing portion, such as an elastic sealing pad, can also be provided on the suction end 21 or the throttling structure, so that the throttling structure is sealed and connected with the suction end 21 when the liquid level of the liquid refrigerant in the internal cavity 11 reaches the height position where the suction end 21 is located.

[0055] exist Figure 1In the embodiment, the guide structure may include: at least two guide rails 31. The at least two guide rails 31 are arranged on the inner wall of the housing 10 along the vertical direction, and at least two parts of the floating plate 30 are slidably connected to the at least two guide rails 31 respectively. The sliding cooperation between the floating plate 30 and the at least two guide rails 31 can realize the overall stable rise or fall of the floating plate 30, and avoid the floating plate 30 being stuck at a certain position in the housing 10 and losing the function of throttling adjustment, thereby improving the reliability of the gas-liquid separator.

[0056] The portion of the internal cavity 11 of the housing 10 corresponding to the guide structure may be a cylinder with a circular, elliptical or polygonal cross section, and the circumferential side walls of the housing 10 may all be parallel to the vertical direction. Accordingly, the guide rail 31 is vertically arranged on the inner wall of the housing 10 and may be fixedly connected to the interior of the housing 10 by means of a connector or welding, bonding, or the like.

[0057] The guide rails 31 provided on the inner wall of the housing 10 may be two guide rails provided at 180 degrees in the circumference, or three guide rails provided at 120 degrees in the circumference, etc. Such guide rail structures occupy less space in the internal cavity 11. In other embodiments, other forms of guide mechanisms may also be provided, such as a guide rail provided in the center of the housing 10 to guide the lifting and lowering of the floating plate.

[0058] In order to prevent the floating sheet 30 from excessively floating under the action of the liquid surface, refer to Figure 1 In some embodiments, at least two guide rails 31 have limiting structures 31H and 31L. The limiting structure 31H is configured to limit the highest position of the floating plate 30, so that the floating plate 30 cannot rise further after rising to the position, and the limiting structure 31L is configured to limit the lowest position of the floating plate 30, so that the floating plate 30 cannot fall further after falling to the position.

[0059] refer to Figure 1-Figure 4 In some embodiments, the gas-liquid separator further includes: an air inlet pipe 40 connected to the internal cavity 11. The air inlet pipe 40 has an air inlet end 41 with an opening facing downward. The air inlet pipe 40 can be connected to other equipment outside the shell 10, such as an evaporator, so as to receive the gas-liquid two-phase refrigerant to be separated from the evaporator.

[0060] exist Figure 1 and Figure 4In the embodiment, the height position of the air inlet end 41 of the air inlet pipe 40 is lower than the height position of the air suction end 21, and the floating plate 30 has a first through hole 33 that penetrates the floating plate 30 in a vertical direction along the upper surface of the floating plate 30. The projection of the air inlet end 41 on the upper surface of the floating plate 30 is located in the first through hole 33, so that when the liquid level of the liquid refrigerant in the internal cavity 11 reaches the height position of the air suction end 21, the air inlet end 41 passes through the first through hole 33. The cross-sectional area of ​​the first through hole 33 can be larger than the cross-sectional area of ​​the outer contour of the air inlet end 41, so that the air inlet end 41 can pass through the first through hole 33 smoothly.

[0061] By providing the first through hole 33 on the floating sheet, and making the projection of the air inlet end 41 on the upper surface of the floating sheet 30 be located in the first through hole 33, when the floating sheet 30 floats up to approach the air inlet end 41, the air inlet end 41 does not interfere with the solid part of the floating sheet 30, but passes through the first through hole 33. Moreover, the first through hole 33 is provided at a height lower than the air suction end 21, and when the liquid surface covers the air inlet end 41, it does not affect the air intake process of the gas-liquid separator.

[0062] In some embodiments, a portion of the exhaust pipe 20 is located in the internal cavity 11, which may affect the floating sheet 30. Figure 1 In the embodiment, the exhaust pipe 20 may further include a U-shaped curved portion 22 located in the internal cavity 11, and the non-enclosed section of the U-shaped curved portion 22 is arranged upward. Accordingly, the floating plate 30 may include a second through hole 34 penetrating the floating plate 30 in a vertical direction along the upper surface of the floating plate 30, and the projection of the U-shaped curved portion 22 on the upper surface of the floating plate 30 is located in the second through hole 34, so that when the liquid level of the liquid refrigerant in the internal cavity 11 changes, the U-shaped curved portion 22 always passes through the second through hole 34. The second through hole 34 may be an oblong hole, and is slightly larger than the two sides of the U-shaped curved portion 22, so as not to affect the relative movement of the two.

[0063] In this way, the exhaust pipe 20 will not interfere with the lifting and lowering of the floating plate 30, and if no other guide mechanism is provided or the guide mechanism fails, the exhaust pipe 20 can still guide the lifting and lowering of the floating plate 30 to a certain extent. An oil return hole can be provided at the lower position of the U-shaped curved portion 22 so that the lubricating oil separated from the liquid refrigerant can return to the compressor through the oil return hole.

[0064] Refer to the above instructions and Figure 1-Figure 4Let's give an example. The gas-liquid separator receives the gas-liquid two-phase refrigerant from the evaporator through the air inlet pipe. The gas-liquid two-phase refrigerant is separated into gas and liquid after entering the internal cavity of the shell. The lighter gaseous refrigerant is discharged to the outside through the exhaust pipe, while the heavier liquid refrigerant remains in the internal cavity of the shell. In some cases, such as when heating under low temperature conditions, the evaporation capacity of the evaporator is greatly attenuated, and the refrigerant cannot be fully evaporated, resulting in more liquid refrigerant in the gas-liquid two-phase refrigerant entering the gas-liquid separator, thereby causing the accumulation of liquid refrigerant. As the liquid refrigerant accumulates, the liquid level of the liquid refrigerant gradually rises. At this time, the liquid refrigerant has a buoyancy on the float, causing the float to float synchronously.

[0065] When the liquid level reaches the height of the suction end of the suction pipe, it is equivalent to reaching the full liquid state of the gas-liquid separator. At this time, the gas-liquid separator has basically lost its "flash evaporation" effect. The upper surface of the float is against the lower end surface of the suction end, and the flow channel on the float is connected to the opening of the suction port. At this time, the liquid refrigerant flows into the suction port after throttling through the flow channel. Through the throttling effect of the flow channel, the amount of liquid refrigerant sucked into the compressor per unit time is reduced, and a large amount of liquid refrigerant is prevented from being discharged into the compressor through the exhaust pipe, thereby reducing the risk of compressor liquid hammer and improving the reliability of the compressor and the air conditioning system.

[0066] After the exhaust superheat of the air conditioning system is established, the liquid refrigerant in the gas-liquid separator evaporates completely, the liquid level drops, and the float will gradually drop with the liquid level.

[0067] The various embodiments of the gas-liquid separator disclosed above can be used in various air-conditioning systems, such as a multi-split air-conditioning system. Therefore, an embodiment of the present disclosure provides an air-conditioning system including any of the above-mentioned gas-liquid separators. Figure 5 Schematic diagram of the structure of some embodiments of the multi-split air conditioning system according to the present disclosure. Figure 5 The air conditioning system may be a multi-split air conditioning system. When the gas-liquid separator of the embodiment of the present disclosure is used, the risk of compressor liquid hammer when the gas-liquid separator in some modules with smaller capacity is full of liquid when air conditioning outdoor units with different capacities are operated in parallel can be effectively reduced, thereby improving the operating reliability of the module and even the entire multi-split air conditioning system.

[0068] exist Figure 5In the figure, an example of a multi-split air-conditioning system including multiple modules is shown by way of example. This example is only given for the convenience of understanding and should not be construed as a limitation on the multi-split air-conditioning system. These modules A, B, and C are connected to multiple evaporators D that are centrally arranged. Each module may include a compressor, a condenser, a throttling element, a four-way valve, and the aforementioned gas-liquid separator embodiment. For example, module A includes compressor A1, condenser A2, throttling element A3, four-way valve A4, and gas-liquid separator A5, module B includes compressor B1, condenser B2, throttling element B3, four-way valve B4, and gas-liquid separator B5, and module C includes compressor C1, condenser C2, throttling element C3, four-way valve C4, and gas-liquid separator C5.

[0069] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0070] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A gas-liquid separator, characterized in that: include: A housing (10) having an internal cavity (11); an exhaust pipe (20) having an air intake end (21) inserted into the internal cavity (11); and A throttling adjustment mechanism is disposed in the internal cavity (11) and is configured to adjust the throttling area of ​​the air intake end (21) according to the liquid level of the liquid refrigerant in the internal cavity (11); The throttling adjustment mechanism is configured to reduce the throttling area of ​​the air intake end (21) when the liquid level of the liquid refrigerant in the internal cavity (11) reaches the height position where the air intake end (21) is located; The throttling adjustment mechanism comprises: The floating plate (30) floats on the liquid surface of the liquid refrigerant in the internal cavity (11) and rises and falls with the rise and fall of the liquid level of the liquid refrigerant in the internal cavity (11). The floating plate (30) has a throttling structure, and the throttling structure is configured to form a throttling effect on the air intake end (21) when the liquid level of the liquid refrigerant in the internal cavity (11) reaches the height position where the air intake end (21) is located.

2. The gas-liquid separator according to claim 1, characterized in that: The throttling structure is a flow channel (32) arranged in the floating plate (30), the cross-sectional area of ​​the flow channel (32) is smaller than the cross-sectional area of ​​the opening of the intake end (21), and the throttling structure is configured to contact the intake end (21) when the liquid level of the liquid refrigerant in the internal cavity (11) reaches the height position where the intake end (21) is located.

3. The gas-liquid separator according to claim 2, characterized in that: The flow channel (32) penetrates the floating plate (30) in a vertical direction of the upper surface of the floating plate (30), the opening of the air intake end (21) is arranged downward, and the projection on the upper surface of the floating plate (30) overlaps with the flow channel opening portion of the flow channel (32) on the upper surface of the floating plate (30).

4. The gas-liquid separator according to claim 2, characterized in that: The throttling adjustment mechanism also includes: The guide structure is connected to the floating plate (30) and is configured to guide the upward movement of the floating plate (30) when the liquid level of the liquid refrigerant in the internal cavity (11) rises to the height position where the suction end (21) is located, so that the throttling structure is in close contact with the suction end (21) when the liquid level of the liquid refrigerant in the internal cavity (11) reaches the height position where the suction end (21) is located.

5. The gas-liquid separator according to claim 4, characterized in that: The guiding structure comprises: At least two guide rails (31) are arranged on the inner wall of the housing (10) in a vertical direction. Wherein, at least two parts of the floating sheet (30) are slidably connected to the at least two guide rails (31) respectively.

6. The gas-liquid separator according to claim 5, characterized in that: The at least two guide rails (31) have a limiting structure (31H, 31L), and the limiting structure (31H, 31L) is configured to limit the highest rising position and the lowest descending position of the floating sheet (30).

7. The gas-liquid separator according to claim 1, characterized in that: Also includes: An air intake pipe (40) communicates with the internal cavity (11) and has an air intake end (41) with an opening facing downward; The height position of the air intake end (41) of the air intake pipe (40) is lower than the height position of the air intake end (21), and the floating plate (30) has a first through hole (33) penetrating the floating plate (30) in a vertical direction along the upper surface of the floating plate (30), and the projection of the air intake end (41) on the upper surface of the floating plate (30) is located in the first through hole (33), so that when the liquid level of the liquid refrigerant in the internal cavity (11) reaches the height position of the air intake end (21), the air intake end (41) passes through the first through hole (33).

8. The gas-liquid separator according to claim 1, characterized in that: The exhaust pipe (20) also has a U-shaped curved portion (22) located in the internal cavity (11), and the non-enclosed section of the U-shaped curved portion (22) is arranged upward. The floating plate (30) has a second through hole (34) penetrating the floating plate (30) in a vertical direction along the upper surface of the floating plate (30), and the projection of the U-shaped curved portion (22) on the upper surface of the floating plate (30) is located in the second through hole (34), so that when the liquid level of the liquid refrigerant in the internal cavity (11) changes, the U-shaped curved portion (22) always passes through the second through hole (34).

9. The gas-liquid separator according to claim 1, characterized in that: The floating sheet (30) is in the shape of a plate and has a continuous or separated cavity structure inside.

10. An air conditioning system, characterized in that: include: The gas-liquid separator (A5, B5, C5) according to any one of claims 1 to 9.

11. The air conditioning system according to claim 10, characterized in that: The air conditioning system is a multi-split air conditioning system.

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