Gas-liquid separator, air conditioning system and air conditioner

Abstract

The invention discloses a gas-liquid separator, an air conditioning system and an air conditioner, the gas-liquid separator comprises a shell, the shell is provided with a first inlet / outlet, a gas outlet and a second inlet / outlet, the gas outlet is located in the top wall of the shell, the second inlet / outlet is located in the bottom wall of the shell, and the first inlet / outlet is located in the peripheral wall of the shell; and the floater assembly is movably arranged in the shell in the vertical direction, and the floater assembly can block or open the second inlet and outlet and block or open the gas outlet. According to the gas-liquid separator, the floater assembly moves along with the rising and falling of the liquid level in the shell, so that the floater assembly moves up and down in the shell, and the floater assembly can open the gas outlet and close the second inlet and outlet, open the second inlet and outlet to close the gas outlet or open the gas outlet and the second inlet and outlet at the same time; therefore, automatic adjusting type gas-liquid separation is achieved, and efficient gas-liquid separation can be achieved under variable working conditions.

Description

Technical Field

[0001] This invention relates to the field of air handling equipment technology, and in particular to a gas-liquid separator, an air conditioning system, and an air conditioner. Background Technology

[0002] In related technologies, the refrigerant inlet of an air conditioner evaporator is a two-phase flow of gas and liquid, which can lead to uneven flow distribution in multi-path evaporators. Gas-liquid separation before the inlet allows the liquid phase to enter the evaporator, effectively improving the uniformity of distribution, while the gas phase bypasses to the evaporator outlet. Currently, gas-liquid separators used before the evaporator are separation tanks and T-tubes. Separation tanks offer high separation efficiency but are large and costly, which contradicts the current trend towards smaller sizes. T-tubes are small but have low separation efficiency, resulting in liquid outflow at the gas phase outlet or gas contamination at the liquid phase outlet. Furthermore, neither can automatically adjust based on flow rate and the volume fraction of the two phases, failing to meet the requirements for efficient gas-liquid separation under varying operating conditions. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a gas-liquid separator that can achieve automatic adjustable gas-liquid separation.

[0004] The present invention also proposes an air conditioning system, which includes the gas-liquid separator described above.

[0005] The present invention also proposes an air conditioner, which includes the above-described air conditioning system.

[0006] According to an embodiment of the present invention, a gas-liquid separator includes: a housing having a first inlet / outlet, a gas outlet, and a second inlet / outlet, the gas outlet being located on the top wall of the housing, the second inlet / outlet being located on the bottom wall of the housing, and the first inlet / outlet being located on the peripheral wall of the housing; and a float assembly movably disposed within the housing in a vertical direction, the float assembly being capable of blocking or opening the second inlet / outlet and blocking or opening the gas outlet.

[0007] According to an embodiment of the present invention, the gas-liquid separator is provided with a first inlet / outlet, a gas outlet, and a second inlet / outlet on the outer shell, such that the gas outlet is located above the second inlet / outlet. A float assembly is provided inside the outer shell, and the float assembly moves with the rise and fall of the liquid level inside the outer shell, thereby realizing the movement of the float assembly in the vertical direction within the outer shell. This allows the float assembly to open the gas outlet and close the second inlet / outlet, open the second inlet / outlet and close the gas outlet, or open both the gas outlet and the second inlet / outlet simultaneously, thereby achieving automatic adjustment of gas-liquid separation and enabling efficient gas-liquid separation under varying operating conditions.

[0008] According to some embodiments of the present invention, a spiral structure is provided on the inner peripheral wall of the outer shell, and the spiral structure and the inner peripheral wall of the outer shell together define a spiral groove extending in the vertical direction, and the first inlet and outlet penetrate the bottom wall of the spiral groove.

[0009] In some embodiments of the present invention, the first inlet / outlet is located at the upper end of the spiral groove.

[0010] In some embodiments of the present invention, the lower end of the spiral groove has a baffle for sealing the lower end of the spiral groove.

[0011] In some embodiments of the present invention, the inner diameter of the spiral structure is d5, where d5 is 20mm-40mm;

[0012] And / or, the height of the spiral structure is L1, where L1 is 16mm-20mm;

[0013] And / or, the pitch of the spiral structure is L6, the inner diameter of the first inlet and outlet is d1, and L6 / d1 is 1-1.6;

[0014] And / or, the height of the spiral structure is L1, the pitch of the spiral structure is L6, and L1 / L6 is 0.8-2.5.

[0015] According to some embodiments of the present invention, the extension direction of the first inlet / outlet is tangential to the inner peripheral wall of the outer casing.

[0016] In some embodiments of the present invention, the upper end of the float assembly is connected to a first limiting shaft, which is adapted to pass through the gas outlet.

[0017] In some embodiments of the present invention, the length of the first limiting shaft is L51, and L51 is 20mm-30mm.

[0018] In some embodiments of the present invention, the lower end of the float assembly is connected to a second limiting shaft, which is adapted to pass through the second inlet / outlet.

[0019] In some embodiments of the present invention, the length of the second limiting shaft is L52, and L52 is 20mm-30mm.

[0020] According to some embodiments of the present invention, the float assembly includes: a float block; a first sealing head, the first sealing head being located above and connected to the float block for blocking or opening the gas outlet; and a second sealing head, the second sealing head being located below and connected to the float block for blocking or opening the second inlet / outlet, wherein when the first sealing head blocks the gas outlet, the second sealing head opens the second inlet / outlet, and when the second sealing head blocks the second inlet / outlet, the first sealing head opens the gas outlet.

[0021] In some embodiments of the present invention, the first sealing head and the float are connected by a first connecting shaft; and / or, the second sealing head and the float are connected by a second connecting shaft.

[0022] In some embodiments of the present invention, the first sealing head includes a first sealing section, the first sealing section having a gradually increasing cross-sectional area from top to bottom; and / or, the second sealing head includes a second sealing section, the second sealing section having a gradually increasing cross-sectional area from bottom to top.

[0023] In some embodiments of the present invention, the float is cylindrical.

[0024] In some embodiments of the present invention, the diameter of the float is D1, which is 25mm-45mm; and / or the height of the float is L2, which is 20mm-30mm.

[0025] In some embodiments of the present invention, the ratio of the density of the float to the density of the liquid separated by the gas-liquid separator is 0.5-0.7.

[0026] In some embodiments of the present invention, when the first sealing head completely blocks the gas outlet, the first sealing head has a first position flush with the lower end of the gas outlet; when the second sealing head completely blocks the second inlet and outlet, the second sealing head has a second position flush with the upper end of the second inlet and outlet; the distance between the first position and the second position is L4; the vertical distance between the lower end of the gas outlet and the lower end of the second inlet and outlet is L3; L4 < L3; and L4 is 90mm-100mm.

[0027] According to some embodiments of the present invention, the inner diameter of the first inlet and outlet is d1, where d1 is 6mm-20mm;

[0028] And / or, the minimum inner diameter of the gas outlet is d2, where d2 is 3mm-6mm;

[0029] And / or, the inner diameter of the second inlet / outlet is d3, where d3 is 6mm-10mm;

[0030] And / or, the inner diameter of the outer shell is d4, where d4 is 40mm-60mm;

[0031] And / or, the vertical distance between the lower end of the gas outlet and the upper end of the second inlet / outlet is L3, where L3 is 105mm-115mm.

[0032] An air conditioning system according to an embodiment of the present invention includes: a compressor having an exhaust port and a return port; a reversing assembly having a first port, a second port, a third port, and a fourth port, wherein one of the first port, the second port, and the third port is connected, and the fourth port is connected to the other of the second port and the third port; the first port is connected to the exhaust port, and the fourth port is connected to the return port; an outdoor heat exchanger having one end connected to the second port; an indoor heat exchanger having one end connected to the third port; and the aforementioned gas-liquid separator having the other end of the indoor heat exchanger connected to the first inlet / outlet, the other end of the outdoor heat exchanger connected to the second inlet / outlet, and the gas outlet connected to the second port.

[0033] According to an embodiment of the present invention, the air conditioning system, by setting the above-mentioned gas-liquid separator, provides a first inlet / outlet, a gas outlet, and a second inlet / outlet on the outer casing, such that the gas outlet is located above the second inlet / outlet, and a float assembly is provided inside the outer casing. The float assembly moves with the rise and fall of the liquid level inside the outer casing, thereby realizing that the float assembly moves in the vertical direction inside the outer casing. It can realize that the float assembly opens the gas outlet and closes the second inlet / outlet, opens the second inlet / outlet and closes the gas outlet, or opens the gas outlet and the second inlet / outlet simultaneously, thereby realizing automatic adjustment gas-liquid separation and achieving efficient gas-liquid separation under varying operating conditions.

[0034] In some embodiments of the present invention, a one-way valve is provided between the gas outlet and the second port, the one-way valve only allowing the flowing medium to flow from the gas outlet to the second port.

[0035] An air conditioner according to an embodiment of the present invention includes the air conditioning system described above.

[0036] According to an embodiment of the present invention, an air conditioner is provided with the above-described air conditioning system and the above-described gas-liquid separator. A first inlet and outlet, a gas outlet and a second inlet and outlet are provided on the outer casing, such that the gas outlet is located above the second inlet and outlet. A float assembly is provided inside the outer casing. The float assembly moves with the rise and fall of the liquid level inside the outer casing, thereby realizing that the float assembly moves in the vertical direction inside the outer casing. It can realize that the float assembly opens the gas outlet and closes the second inlet and outlet, opens the second inlet and outlet and closes the gas outlet, or opens the gas outlet and the second inlet and outlet simultaneously, thereby realizing automatic adjustment gas-liquid separation and achieving efficient gas-liquid separation under varying operating conditions.

[0037] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is a perspective view of a gas-liquid separator according to an embodiment of the present invention;

[0040] Figure 2 This is a perspective view of a gas-liquid separator according to an embodiment of the present invention from another angle;

[0041] Figure 3 This is a bottom view of a gas-liquid separator according to an embodiment of the present invention;

[0042] Figure 4 It is along Figure 3 Sectional view of line AA in the middle;

[0043] Figure 5 This is a perspective view of the float assembly of a gas-liquid separator according to an embodiment of the present invention;

[0044] Figure 6 This is a front view of the float assembly of a gas-liquid separator according to an embodiment of the present invention;

[0045] Figure 7 This is a cross-sectional view of a gas-liquid separator according to an embodiment of the present invention;

[0046] Figure 8 This is a comparison chart of the separation efficiency of a gas-liquid separator with baffles and a conventional one without baffles, according to an embodiment of the present invention.

[0047] Figure 9 This is a graph showing the relationship between the separation efficiency of the second inlet and outlet of the gas-liquid separator according to an embodiment of the present invention and L6 / d1;

[0048] Figure 10 This is a graph showing the relationship between the separation efficiency of the second inlet and outlet of the gas-liquid separator according to an embodiment of the present invention and L1 / L6.

[0049] Figure 11 This is a graph showing the relationship between the separation efficiency of the gas-liquid separator according to an embodiment of the present invention and the ratio of the density of the float to the density of the separated liquid.

[0050] Figure label:

[0051] 100. Gas-liquid separator;

[0052] 1. Outer shell; 11. Shell body; 111. First section; 112. Second section; 113. Third section; 12. Gas exhaust pipe; 13. Second inlet / outlet pipe; 14. Reinforcing boss; 15. First inlet / outlet pipe; 151. First inlet / outlet; 16. Gas outlet; 17. Second inlet / outlet; 18. Spiral structure; 181. Spiral groove; 19. Baffle;

[0053] 2. Float assembly; 21. Float block; 22. First sealing head; 221. First sealing section; 222. Third sealing section; 23. Second sealing head; 231. Second sealing section; 232. Fourth sealing section; 24. First connecting shaft; 25. Second connecting shaft; 26. First limiting shaft; 27. Second limiting shaft. Detailed Implementation

[0054] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] A gas-liquid separator 100 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0058] like Figures 1-5 As shown, the gas-liquid separator 100 according to an embodiment of the present invention includes: a housing 1 and a float assembly 2.

[0059] Specifically, such as Figure 1 and Figure 2 As shown, the outer and inner contours of the cross-section of the outer shell 1 are both circular, that is, the outer surface of the outer shell 1 is cylindrical or conical, and the cross-section of the cavity inside the outer shell 1 is circular. The outer shell 1 has a first inlet / outlet 151, a gas outlet 16, and a second inlet / outlet 17. The gas outlet 16 is located on the top wall of the outer shell 1, the second inlet / outlet 17 is located on the bottom wall of the outer shell 1, and the first inlet / outlet 151 is located on the peripheral wall of the outer shell 1.

[0060] More specifically, the outer shell 1 includes a shell body 11, a gas exhaust pipe 12, and a second inlet / outlet pipe 13. The gas exhaust pipe 12 is vertically arranged and connected to the top wall of the shell body 11. The gas outlet 16 penetrates the top wall of the shell body and the gas exhaust pipe 12. The second inlet / outlet pipe 13 is vertically arranged and connected to the bottom wall of the shell body 11. The second inlet / outlet 17 penetrates the bottom wall of the shell body 11 and the second inlet / outlet pipe 13. The shell body 11 includes a first segment 111, a second segment 112, and a third segment 113 connected in sequence. The second segment 112 is cylindrical, and the diameters of its outer and inner peripheral walls remain constant from top to bottom. The first segment 111 is located above the second segment 112, and the diameters of its inner and outer peripheral walls gradually decrease from bottom to top. The third segment 113 is located below the second segment 112, and the diameters of its inner and outer peripheral walls gradually decrease from top to bottom.

[0061] In addition, the outer casing 1 also includes a first inlet / outlet pipe 15, which is connected to the outer peripheral wall of the casing body 11, and the first inlet / outlet 151 penetrates the outer peripheral wall of the casing body 11 and the first inlet / outlet pipe 15.

[0062] The outer peripheral walls of the gas discharge pipe 12, the second inlet / outlet pipe 13, and the first inlet / outlet pipe 15 are all provided with stepped grooves spaced apart along the length direction, which facilitates the connection between the gas discharge pipe 12, the second inlet / outlet pipe 13, and the first inlet / outlet pipe 15 and other pipelines.

[0063] Furthermore, such as Figures 1-3 As shown, a reinforcing boss 14 is provided on the outer peripheral wall of the outer shell 1. The reinforcing boss 14 extends along the vertical direction of the outer shell 1, i.e., the axial direction of the outer shell 1, thereby strengthening the structural strength of the outer shell 1. There are multiple reinforcing bosses 14, which are spaced apart along the circumferential direction of the outer shell 1, thereby further strengthening the structural strength of the outer shell 1.

[0064] Optionally, the reinforcing boss 14 and the housing 1 are integrated as a single unit.

[0065] like Figure 4 As shown, the float assembly 2 is movably disposed within the housing 1 in the vertical direction. The float assembly 2 can block or open the second inlet / outlet 17 and the gas outlet 16. The power for the vertical movement of the float assembly 2 comes from the change in the liquid level inside the housing 1. When the liquid level decreases, the float assembly 2 sinks and moves downward; when the liquid level increases, the float assembly 2 rises and moves upward.

[0066] When the gas-liquid separator 100 is applied in a refrigeration system, such as an air conditioning system, and the heat exchanger connected to the gas-liquid separator 100 is used as an evaporator, the refrigerant flows in from the first inlet / outlet 151. After gas-liquid separation, the liquid flows out from the second inlet / outlet 17 and then flows into the evaporator, while the gas bypasses to the evaporator outlet from the gas outlet 16. When there is less liquid and more gas in the casing 1, the low liquid level float assembly 2 sinks, closing the second inlet / outlet 17 and opening the gas outlet 16. The liquid level continues to rise until the float assembly 2 floats up, closing the gas outlet 16 and opening the second inlet / outlet 17. The gas accumulates at the top, forcing the liquid to flow downwards, and the liquid level drops until the float assembly 2 sinks. This process repeats, achieving automatic regulating gas-liquid separation, which can achieve high-efficiency gas-liquid separation under varying operating conditions, with a gas-liquid separation efficiency approaching 100%.

[0067] When the heat exchanger is working as a condenser, the gas outlet 16 of the separator is connected to the high-pressure gas inlet of the condenser, and the second inlet / outlet 17 is connected to the low-pressure condenser outlet. In order to prevent high-pressure gas from flowing directly out of the separator without flowing into the condenser, the gas outlet 16 of the gas-liquid separator 100 needs to be equipped with a one-way valve to prevent gas from flowing into the outer casing 1.

[0068] According to an embodiment of the present invention, the gas-liquid separator 100 is provided with a first inlet / outlet 151, a gas outlet 16, and a second inlet / outlet 17 on the outer shell 1, such that the gas outlet 16 is located above the second inlet / outlet 17. A float assembly 2 is provided inside the outer shell 1, and the float assembly 2 moves with the rise and fall of the liquid level inside the outer shell 1, thereby realizing the vertical movement of the float assembly 2 inside the outer shell 1. The float assembly 2 can open the gas outlet 16 and close the second inlet / outlet 17, open the second inlet / outlet 17 and close the gas outlet 16, or open the gas outlet 16 and the second inlet / outlet 17 simultaneously, thereby realizing automatic adjustment gas-liquid separation. It can achieve efficient gas-liquid separation under varying operating conditions and has a small size.

[0069] In some embodiments of the present invention, such as Figure 4As shown, a spiral structure 18 is provided on the inner peripheral wall of the outer shell 1. The spiral structure 18 and the inner peripheral wall of the outer shell 1 together define a spiral groove 181 extending in the vertical direction. The first inlet and outlet 151 penetrates the bottom wall of the spiral groove 181. The spiral structure 18 can be a spiral protrusion provided on the inner peripheral wall of the outer shell 1, and the spiral groove 181 is defined between two adjacent spiral protrusions and the inner peripheral wall of the outer shell 1.

[0070] Optionally, the spiral structure 18 and the outer shell 1 are integrated as one piece.

[0071] In this application, the first inlet / outlet 151 is located on the peripheral wall of the outer shell 1. The medium, such as refrigerant, entering through the first inlet / outlet 151 can flow along the inner peripheral wall of the outer shell 1. A spiral structure 18 is provided inside the outer shell 1 of the gas-liquid separator 100 of this application. A spiral groove 181 is defined between the spiral structure 18 and the inner peripheral wall of the outer shell 1. The first inlet / outlet 151 is located on the bottom wall of the spiral groove 181. The two-phase medium enters the outer shell 1 through the first inlet / outlet 151 and can rotate and flow under the guidance of the spiral groove 181. Under the action of gravity and centrifugal force, the liquid gathers near the wall and flows out from the lower second inlet / outlet 17, while the gas gathers in the center of the outer shell 1 and flows out from the upper gas outlet 16, thereby improving the gas-liquid separation effect and efficiency.

[0072] Furthermore, such as Figure 4 As shown, the first inlet / outlet 151 is located at the upper end of the spiral groove 181. It can be understood that the first inlet / outlet 151 can be located at the upper starting end of the spiral groove 181. This avoids wasting the spiral structure 18 above the first inlet / outlet 151, simplifies the structure and processing technology of the outer casing 1, and reduces production costs.

[0073] In some embodiments of the present invention, such as Figure 4 As shown, the lower end of the spiral groove 181 has a baffle 19, which is used to block the lower end of the spiral groove 181. The function of the baffle 19 is to interrupt the swirling flow. Without the baffle 19, the fluid continues to move in a spiral motion around the wall after flowing through the spiral structure 18, generating vortices in the space below the gas-liquid separator 100. The center of the vortex extends downwards and even to the second inlet / outlet 17, and the gas will flow out from the center of the vortex through the second inlet / outlet 17, reducing the separation efficiency. With the baffle 19, the swirling flow after the spiral structure 18 is terminated, the fluid flows slowly downwards, the liquid surface is flat and stable, no vortices are generated, and the separation efficiency is improved. Figure 8 As shown, with an inlet liquid volume fraction of 50%, the separation efficiency at different inlet velocities was tested, and the separation efficiency with baffle 19 was much higher than that without baffle 19.

[0074] In addition, during the downward flow of the two-phase medium, the two-phase medium impacts the baffle 19, which can achieve gas-liquid separation, with the liquid flowing downward and the gas separating from the liquid and flowing upward.

[0075] Optionally, the baffle 19 and the housing 1 are integrated.

[0076] In some embodiments of the present invention, such as Figure 7 As shown, the inner diameter of the spiral structure 18 is d5, which is 20mm-40mm. For example, the inner diameter d5 of the spiral structure 18 can be 22mm, 25mm, 28mm, 30mm, 33mm, 35mm, 37mm, or 40mm, etc. This ensures that the spiral structure 18 has sufficient width to hold the liquid, while also ensuring sufficient space for the gas to rise smoothly and for the float assembly 2 to move up and down.

[0077] In some embodiments of the present invention, such as Figure 7 As shown, the height of the spiral structure 18 is L1, which is 16mm-20mm. For example, the height L1 of the spiral structure 18 can be 17mm, 18mm, 19mm, or 20mm. This ensures that the spiral structure 18 has sufficient length to complete the separation of the two phases, while also ensuring that the float assembly 2 has enough space to move up and down.

[0078] In some embodiments of the present invention, such as Figure 7 As shown, the pitch of the spiral structure 18 is L6, the inner diameter of the first inlet / outlet 151 is d1, and L6 / d1 is 1-1.6. For example, the ratio L6 / d1 of the pitch L6 of the spiral structure 18 to the inner diameter d1 of the first inlet / outlet 151 can be 1.1, 1.2, 1.3, 1.4, 1.5, or 1.6, etc. When L6 / d1 is less than 1, the spiral structure 18 will block the first inlet / outlet 151, increasing the flow resistance and causing erosion of the spiral structure 18. When L6 / d1 is large, the flow velocity of the two-phase medium inside the spiral structure 18 decreases, the centrifugal effect weakens, the two phases cannot be completely separated, and the separation efficiency is reduced, such as... Figure 9 As shown. To ensure a separation efficiency of no less than 90%, L6 / d1 is controlled between 1 and 1.6. This can prevent the spiral structure 18 from blocking the first inlet and outlet 151 and causing the two-phase medium to erode the spiral structure 18, while also ensuring that the flow rate of the two-phase medium is not too low, thus ensuring the gas-liquid separation effect.

[0079] In some embodiments of the present invention, such as Figure 7As shown, the height of the helical structure 18 is L1, the pitch of the helical structure 18 is L6, and the ratio L1 / L6 is 0.8-2.5. For example, the ratio L1 / L6 between the height L1 and the pitch L6 of the helical structure 18 can be 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, or 2.5, etc. Here, L1 / L6 represents the number of helical turns, and the maximum ratio is 2.5 to ensure sufficient movement space for the float assembly 2. The smaller the ratio, the fewer the number of turns, the shorter the fluid residence time, and the worse the two-phase separation effect, such as... Figure 10 As shown, when the ratio is below 0.8, the separation efficiency drops rapidly. To ensure a separation efficiency of over 90%, the ratio should be controlled between 0.8 and 2.5.

[0080] In some embodiments of the present invention, such as Figure 1 As shown, the extension direction of the first inlet / outlet 151 is tangential to the inner peripheral wall of the outer casing 1. The extension direction of the first inlet / outlet 151 can be understood as the length direction or extension direction of the first inlet / outlet pipe 15. This allows the two-phase media flowing into the outer casing 1 from the first inlet / outlet 151 to move around the inner peripheral wall of the outer casing 1, thereby achieving gas-liquid separation under the action of gravity and centrifugal force, and improving the gas-liquid separation effect.

[0081] In some embodiments of the present invention, such as Figures 4-6 As shown, the float assembly 2 includes a float block 21, a first sealing head 22, and a second sealing head 23. The float block 21 bears the buoyancy of the entire float assembly 2. The first sealing head 22 is located above and connected to the float block 21, and is used to block or open the gas outlet 16. The second sealing head 23 is located below and connected to the float block 21, and is used to block or open the second inlet / outlet 17. When the first sealing head 22 blocks the gas outlet 16, the second sealing head 23 opens the second inlet / outlet 17. When the second sealing head 23 blocks the second inlet / outlet 17, the first sealing head 22 opens the gas outlet 16.

[0082] Understandably, float 21, first sealing head 22, and second sealing head 23 can move up and down as a whole under the buoyancy of float 21. When the liquid level inside the outer shell 1 is low, the buoyancy of float 21 is small, and the entire buoyancy assembly blocks the second inlet / outlet 17 and opens the gas outlet 16 under the gravity of the entire float assembly 2. As the liquid level inside the outer shell 1 gradually rises, the buoyancy of float 21 increases, the entire float assembly 2 rises, and the second inlet / outlet 17 is gradually opened. At this time, the gas outlet 16 is not yet closed. As the liquid level inside the outer shell 1 continues to rise, float 21 continues to move upward, thereby driving the first sealing head 22 and the second sealing head 23 to move upward until the first sealing head 22 blocks the gas outlet 16, at which point the second inlet / outlet 17 is opened.

[0083] In some embodiments of the present invention, such as Figures 4-6 As shown, the first sealing head 22 and the float 21 are connected by the first connecting shaft 24, and the second sealing head 23 and the float 21 are connected by the second connecting shaft 25. This allows the height of the entire float assembly 2 in the vertical direction to be increased while keeping the volumes of the first sealing head 22, the second sealing head 23 and the float 21 constant. This reduces the vertical movement distance of the float assembly 2 and improves the accuracy of the automatic adjustment of the entire gas-liquid separator 100. At the same time, it reduces the volume of the first sealing head 22 and the second sealing head 23 and reduces their impact on the entire float assembly 2.

[0084] In some embodiments of the present invention, such as Figures 4-6 As shown, the upper end of the float assembly 2 is connected to a first limiting shaft 26, specifically the upper end of the first sealing head 22 is connected to the first limiting shaft 26, and the first limiting shaft 26 is adapted to pass through the gas outlet 16. It can be understood that the first limiting shaft 26 has a certain amount of axial and radial movement space within the gas outlet 16, ensuring smooth movement of the first limiting shaft 26 within the gas outlet 16 and ensuring that gas can pass through and be discharged in the gap between the first limiting shaft 26 and the inner peripheral wall of the gas outlet 16. Furthermore, it can be understood that when the second sealing head 23 blocks the second inlet / outlet 17, the first limiting shaft 26 still partially remains within the gas outlet 16, preventing the float assembly 2 from disengaging from the limiting position of the first limiting shaft 26.

[0085] In this application, by providing a first limiting shaft 26 that passes through the gas outlet 16 at the upper end of the first sealing head 22, the up and down movement of the float assembly 2 can be guided, so that the first sealing head 22 can block the gas outlet 16 and the second sealing head 23 can block the second inlet and outlet 17.

[0086] In some embodiments of the present invention, such as Figure 7 As shown, the length of the first limiting shaft 26 is L51, which is 20mm-30mm. For example, the length L51 of the first limiting shaft 26 can be 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm, etc. This ensures sufficient length for coaxial positioning of the float assembly 2, while avoiding excessive length that would reduce the strength of the first limiting shaft 26.

[0087] In some embodiments of the present invention, such as Figures 4-6As shown, the lower end of the float assembly 2 is connected to a second limiting shaft 27, and specifically, the lower end of the second sealing head 23 is connected to the second limiting shaft 27. The second limiting shaft 27 is adapted to pass through the second inlet / outlet 17. It can be understood that the second limiting shaft 27 has a certain amount of axial and radial movement space within the second inlet / outlet 17, ensuring smooth movement of the second limiting shaft 27 within the second inlet / outlet 17 and ensuring that liquid can pass through and be discharged in the gap between the second limiting shaft 27 and the inner peripheral walls of the second inlet / outlet 17. Furthermore, it can be understood that when the first sealing head 22 blocks the gas outlet 16, the second limiting shaft 27 still partially remains within the second inlet / outlet 17, preventing the float assembly 2 from disengaging from the limiting position of the second limiting shaft 27.

[0088] In this application, by providing a second limiting shaft 27 that passes through the second inlet / outlet 17 at the lower end of the second sealing head 23, the up and down movement of the float assembly 2 can be guided, which facilitates the second sealing head 23 to block the second inlet / outlet 17 and the first sealing head 22 to block the gas outlet 16.

[0089] In some embodiments of the present invention, such as Figure 7 As shown, the length of the second limiting shaft 27 is L52, which is 20mm-30mm. For example, the length L52 of the second limiting shaft 27 can be 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm, etc. This ensures sufficient length for coaxial positioning of the float assembly 2, while avoiding excessive length that would reduce the strength of the second limiting shaft 27.

[0090] In some embodiments of the present invention, such as Figures 4-6 As shown, the first sealing head 22 includes a first sealing section 221, the cross-sectional area of ​​which gradually increases from top to bottom. Therefore, the outer peripheral wall of the first sealing section 221 can act as a guide, facilitating the first sealing head 22's upward movement and allowing it to penetrate into the gas outlet 16 to seal it.

[0091] Furthermore, such as Figures 4-6 As shown, the gas outlet 16 includes a guide section 161 and a discharge section 162. The guide section 161 is located below the discharge section. From bottom to top, the cross-sectional area of ​​the guide section 161 gradually increases, while the cross-sectional area of ​​the discharge section 162 remains constant. Furthermore, the minimum cross-sectional area of ​​the guide section 161 is the same as that of the discharge section 162. The guide section 161 facilitates the entry of the first sealing head 22 into the gas outlet 16.

[0092] Furthermore, the tilt angle of the guide section 161 is the same as that of the first sealing section 221. When the first sealing head 22 blocks the gas outlet 16, the outer peripheral wall of the first sealing section 221 fits against the inner peripheral wall of the guide section 161, which can increase the contact area between the first sealing head 22 and the gas outlet 16 and improve the sealing effect.

[0093] Furthermore, the first sealing head 22 also includes a third sealing section 222, which is located below and connected to the first sealing section 221. The cross-sectional area of ​​the third sealing section 222 gradually decreases from top to bottom. The maximum cross-sectional area of ​​the third sealing section 222 is the same as the maximum cross-sectional area of ​​the first sealing section 221. When the first sealing head 22 completely blocks the gas outlet 16, the upper end of the third sealing section 222 or the lower end of the first sealing section 221 is flush with the lower end of the gas outlet 16.

[0094] In some embodiments of the present invention, such as Figures 4-6 As shown, the second sealing head 23 includes a second sealing section 231, the cross-sectional area of ​​which gradually increases from bottom to top. Therefore, the outer peripheral wall of the second sealing section 231 can act as a guide, facilitating the second sealing head 23 to penetrate into and seal the second inlet / outlet 17 during its downward movement.

[0095] Furthermore, the second sealing head 23 also includes a fourth sealing section 232, which is located above and connected to the second sealing section 231. The cross-sectional area of ​​the fourth sealing section 232 gradually decreases from bottom to top. The maximum cross-sectional area of ​​the fourth sealing section 232 is the same as the maximum cross-sectional area of ​​the second sealing section 231. When the second sealing head 23 completely blocks the gas outlet 16, the lower end of the fourth sealing section 232 or the upper end of the second sealing section 231 is flush with the upper end of the second inlet / outlet 17.

[0096] In some embodiments of the present invention, such as Figures 4-6 As shown, the float 21 is cylindrical. The cylindrical shape of the float 21 makes it easier to calculate its buoyancy and allows for better adaptation to the shape of the inner cavity of the outer shell 1, facilitating the vertical movement of the float assembly 2. Of course, the invention is not limited to this; the float 21 can also be a cube, cuboid, or sphere, etc.

[0097] Furthermore, such as Figure 7As shown, the diameter of float 21 is D1, which is 25mm-45mm. For example, the diameter of float 21 can be 27mm, 29mm, 31mm, 33mm, 35mm, 37mm, 39mm, 41mm, 43mm, or 45mm. When the diameter D1 of float 21 is 25mm-45mm, sufficient volume of float 21 can be ensured, thus ensuring that float 21 has both sufficient buoyancy and gravity. Sufficient buoyancy ensures that float 21 floats normally, and sufficient gravity ensures that float 21 will not be attracted to gas outlet 16 and cannot sink.

[0098] In some embodiments of the present invention, such as Figure 7 As shown, the height of float 21 is L2, which is 20mm-30mm. For example, the height L2 of float 21 can be 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm, etc. When the height L2 of float 21 is 20mm-30mm, it ensures that float 21 has sufficient volume, thereby ensuring that float 21 has both sufficient buoyancy and gravity. Sufficient buoyancy ensures that float 21 floats normally, and sufficient gravity ensures that float 21 will not be attracted to gas outlet 16 and cannot sink.

[0099] In some embodiments of the present invention, the ratio of the density of the float 21 to the density of the liquid separated by the gas-liquid separator 100 is 0.5-0.7. Specific analysis is as follows:

[0100] The separation efficiency of the second inlet / outlet 17 is defined as follows:

[0101]

[0102] The separation efficiency of gas outlet 16 is defined as follows:

[0103]

[0104] Where Q is the volumetric flow rate, m 3 / s, where the subscripts l and g represent liquid and gas, respectively.

[0105] The density of float 21 is directly related to the distribution efficiency, as measured by tests. Figure 11 As a result, the horizontal axis represents the density ratio of float 21 to liquid, and the vertical axis represents the separation efficiency.

[0106] When the ratio of the density of float 21 to the density of the liquid separated by gas-liquid separator 100 is in the range of [0.1, 0.4], float 21 has a large buoyancy but a small weight. Once float 21 rises, gas outlet 16 is blocked. Due to the presence of gas pressure, float 21 will be adsorbed at gas outlet 16. Even if the liquid level drops, float 21 cannot sink, and float 21 loses its automatic adjustment function, entering the too-light failure zone. At this time, gas outlet 16 is blocked but a small amount of gas can still pass through. The second inlet and outlet 17 are fully open, and liquid and most of the gas flow out from the second inlet and outlet 17. Therefore, the separation efficiency η of the second inlet and outlet 17 is very low, while the separation efficiency η of gas outlet 16 remains around 100% because only gas passes through it.

[0107] When the ratio of the density of float 21 to the density of the liquid separated by gas-liquid separator 100 is in the range of [0.8, 1.0], float 21 has low buoyancy but high weight. The liquid level needs to completely submerge float 21 for it to float. If the density is higher, it cannot float at all, and float 21 loses its automatic adjustment function, entering the over-light and over-heavy efficiency zone. At this time, the liquid level remains high, and the liquid accumulates at the bottom. The second inlet and outlet 17 basically only has liquid flowing out, so η below (separation efficiency of the second inlet and outlet 17) is very high, close to 100%. When float 21 is not sufficiently raised, the liquid level may reach gas outlet 16, and some liquid will flow out from gas outlet 16 along with the gas. Therefore, η above (separation efficiency of gas outlet 16) is low.

[0108] When the ratio of the density of float 21 to the density of the liquid separated by gas-liquid separator 100 is in the range of [0.5, 0.7], float 21 has sufficient buoyancy and gravity to smoothly complete the rising and sinking. It automatically adjusts the liquid level to maintain it between gas outlet 16 and the second inlet / outlet 17. At this time, the liquid accumulates at the bottom and the gas accumulates at the top. The second inlet / outlet 17 basically only has liquid flowing out, and the gas outlet 16 basically only has gas flowing out. Both η_upper and η_lower are close to 100%, which is a high-efficiency separation zone.

[0109] In some embodiments of the present invention, such as Figure 7As shown, the vertical distance between the lower end of the gas outlet 16 and the upper end of the second inlet / outlet 17 is L3, which is 105mm-115mm. For example, the vertical distance L3 between the lower end of the gas outlet 16 and the upper end of the second inlet / outlet 17 can be 106mm, 107mm, 108mm, 109mm, 110mm, 111mm, 112mm, 113mm, 114mm, or 115mm, etc. When the vertical distance L3 between the lower end of the gas outlet 16 and the upper end of the second inlet / outlet 17 is 105mm-115mm, sufficient internal space can be ensured, allowing the gas and liquid phases to have enough space for separation, and ensuring that the float has sufficient vertical movement space, while reducing the volume of the gas-liquid separator 100.

[0110] In some embodiments of the present invention, such as Figure 7 As shown, when the first sealing head 22 completely blocks the gas outlet 16, it has a first position flush with the lower end of the gas outlet 16. When the second sealing head 23 completely blocks the second inlet / outlet 17, it has a second position flush with the upper end of the second inlet / outlet 17. The distance between the first and second positions is L4, and the vertical distance between the lower end of the gas outlet 16 and the upper end of the second inlet / outlet 17 is L3. L4 < L3, and L4 is 90mm-100mm. For example, the distance L4 between the first and second positions can be 91mm, 92mm, 93mm, 94mm, 95mm, 96mm, 97mm, 98mm, 99mm, or 10mm. When the distance L4 between the first and second positions is 90mm-100mm and slightly less than L3, sufficient space for movement within the cavity can be ensured. If it is too small, the float assembly 2 will float too much and lose its liquid level regulation function.

[0111] In this application, the first position is the connection between the first sealing segment 221 and the third sealing segment 222, and the second position is the connection between the second sealing segment 231 and the fourth sealing segment 232. The distance between the first position and the second position can be the distance between the lower end of the first sealing segment 221 and the upper end of the second sealing segment 231.

[0112] In some embodiments of the present invention, such as Figure 7As shown, the inner diameter of the first inlet / outlet 151 is d1, which ranges from 6mm to 20mm. For example, the inner diameter d1 of the first inlet / outlet 151 can be 7mm, 9mm, 10mm, 11mm, 13mm, 15mm, 17mm, 19mm, or 20mm. If the inner diameter of the first inlet / outlet 151 is too small, the velocity will be too high, increasing flow resistance loss and intensifying erosion of the wall surface, thus reducing service life. If the inner diameter of the first inlet / outlet 151 is too large, the velocity will be insufficient, and the centrifugal force will be inadequate to achieve efficient gas-liquid separation. When the inner diameter d1 of the first inlet / outlet 151 is between 6mm and 20mm, it avoids both excessively high and low velocities, preventing increased flow resistance loss and erosion of the wall surface, thus improving service life. Simultaneously, it avoids insufficient centrifugal force to achieve efficient gas-liquid separation, thereby improving the gas-liquid separation effect.

[0113] In some embodiments of the present invention, the minimum inner diameter of the gas outlet 16 is d2, which is 3mm-6mm. For example, in this application, the minimum inner diameter of the gas outlet 16 is the diameter of the discharge section 162. For example, the minimum inner diameter of the gas outlet 16 can be 4mm, 5mm, or 6mm, etc. If the inner diameter of the gas outlet 16 is too small, the gas cannot be discharged in time; if the inner diameter of the gas outlet 16 is too large, the cross-sectional area increases, and the pressure difference between the inside and outside of the outer shell 1 will cause the float assembly 2 to be adsorbed on the gas outlet 16 and unable to sink, thus causing the float assembly 2 to lose its liquid level regulation function. When the minimum inner diameter d2 of the gas outlet 16 is 3mm-6mm, it facilitates the discharge of gas and prevents the float assembly 2 from being adsorbed on the gas outlet 16 and unable to sink, ensuring the separation effect of the gas-liquid separator 100.

[0114] In some embodiments of the present invention, such as Figure 7 As shown, the inner diameter of the second inlet / outlet 17 is d3, which is 6mm-10mm. For example, the inner diameter d3 of the second inlet / outlet 17 can be 7mm, 8mm, 9mm, or 10mm, etc. If the inner diameter of the second inlet / outlet 17 is too small, the liquid cannot be discharged in time, and the flow resistance loss will increase; if the inner diameter of the second inlet / outlet 17 is too large, the liquid discharge speed will be too fast, and the float will not respond in time and lose its liquid level regulation function. When the inner diameter d3 of the second inlet / outlet 17 is 6mm-10mm, it is convenient for the liquid to be discharged without causing the liquid to be discharged too quickly, which would prevent the float assembly 2 from floating, thus ensuring the separation effect of the gas-liquid separator 100.

[0115] In some embodiments of the present invention, such as Figure 7As shown, the inner diameter of the outer shell 1 is d4, which is 40mm-60mm. For example, the inner diameter d4 of the outer shell 1 can be 42mm, 45mm, 47mm, 49mm, 50mm, 51mm, 53mm, 55mm, 57mm, 59mm, or 60mm. If the inner diameter of the outer shell 1 is too small, the liquid level will change too quickly, and the float assembly 2 will not be able to float and sink in time, thus losing its liquid level regulation function. When the liquid flow is too violent, the buoyancy will decrease, causing the float assembly 2 to fail to float and thus lose its liquid level regulation function. If the inner diameter of the outer shell 1 is too large, the liquid level will change too slowly, and the float assembly 2 will not be able to respond quickly to the liquid level changes, thus losing its liquid level regulation function. When the inner diameter d4 of the outer shell 1 is 40mm-60mm, it can be ensured that the liquid level change inside the outer shell 1 is neither too fast nor too slow, so that the float assembly 2 can respond quickly to the liquid level changes, improving the automatic adjustment capability of the float assembly 2 and the separation effect of the gas-liquid separator 100.

[0116] An air conditioning system according to an embodiment of the present invention is described below.

[0117] An air conditioning system according to an embodiment of the present invention includes a compressor, a reversing assembly, an outdoor heat exchanger, an indoor heat exchanger, and the gas-liquid separator 100 described above.

[0118] Specifically, the compressor has an exhaust port and a return port. The reversing assembly, such as a four-way valve, has a first port, a second port, a third port, and a fourth port. One of the first port, the second port, and the third port is connected, and the fourth port is connected to the other of the second port and the third port. The first port is connected to the exhaust port, and the fourth port is connected to the return port. One end of the outdoor heat exchanger is connected to the second port, and one end of the indoor heat exchanger is connected to the third port. The other end of the indoor heat exchanger is connected to the first inlet / outlet 151, and the other end of the outdoor heat exchanger is connected to the second inlet / outlet 17. The gas outlet 16 is connected to the second port.

[0119] When the outdoor heat exchanger is used as an evaporator, the high-temperature, high-pressure refrigerant discharged from the compressor flows to the indoor heat exchanger. The two-phase refrigerant, having completed heat exchange in the indoor heat exchanger, flows from the first inlet / outlet 151 into the gas-liquid separator 100. After gas-liquid separation, the liquid flows out from the second inlet / outlet 17 and then flows into the outdoor heat exchanger for further heat exchange. The gas bypasses the outdoor heat exchanger outlet from the gas outlet 16, merging with the refrigerant that has completed heat exchange in the outdoor heat exchanger before flowing back to the compressor. When there is less liquid and more gas in the outer casing 1, the low-level float assembly 2 sinks, closing the second inlet / outlet 17 and opening the gas outlet 16. The liquid level continues to rise until the float assembly 2 floats up, closing the gas outlet 16 and opening the second inlet / outlet 17. The gas accumulates above, forcing the liquid downwards, causing the liquid level to drop until the float assembly 2 sinks. This cycle repeats, achieving automatic adjustable gas-liquid separation. High-efficiency gas-liquid separation can be achieved under varying operating conditions, with a separation efficiency approaching 100%.

[0120] When the outdoor heat exchanger operates as a condenser, the high-temperature and high-pressure refrigerant discharged from the compressor can flow into the outdoor heat exchanger. After heat exchange is completed in the outdoor heat exchanger, the refrigerant flows into the gas-liquid separator 100 through the second inlet / outlet 17, and then flows into the gas-liquid separator 100 through the first inlet / outlet 151 to the indoor heat exchanger for heat exchange. After heat exchange is completed in the indoor heat exchanger, the refrigerant flows back to the compressor for the next cycle.

[0121] According to an embodiment of the present invention, the air conditioning system, by setting the gas-liquid separator 100, provides a first inlet / outlet 151, a gas outlet 16, and a second inlet / outlet 17 on the outer casing 1, such that the gas outlet 16 is located above the second inlet / outlet 17, and a float assembly 2 is provided inside the outer casing 1. The float assembly 2 moves with the rise and fall of the liquid level inside the outer casing 1, thereby realizing that the float assembly 2 moves in the vertical direction inside the outer casing 1. It can realize that the float assembly 2 opens the gas outlet 16 and closes the second inlet / outlet 17, opens the second inlet / outlet 17 and closes the gas outlet 16, or opens the gas outlet 16 and the second inlet / outlet 17 at the same time, thereby realizing automatic adjustment gas-liquid separation, and can achieve efficient gas-liquid separation under varying operating conditions.

[0122] In some embodiments of the present invention, a one-way valve is provided between the gas outlet 16 and the second port. The one-way valve only allows the flowing medium to flow from the gas outlet 16 to the second port. This prevents the high-temperature, high-pressure refrigerant discharged from the compressor from directly entering the gas-liquid separator 100 through the gas outlet 16 when the outdoor heat exchanger is used as a condenser, thus avoiding heat exchange through the outdoor heat exchanger and ensuring the heat exchange effect of the outdoor heat exchanger, thereby guaranteeing the energy efficiency of the entire air conditioning system.

[0123] An air conditioner according to an embodiment of the present invention is described below.

[0124] An air conditioner according to an embodiment of the present invention includes the air conditioning system described above. The air conditioner of the present invention can be a wall-mounted air conditioner, a floor-standing air conditioner, a portable air conditioner, a window air conditioner, a ceiling-mounted unit, a ducted unit, or a central air conditioning system, etc.

[0125] According to an embodiment of the present invention, an air conditioner is provided with the above-described air conditioning system and the above-described gas-liquid separator 100. A first inlet / outlet 151, a gas outlet 16, and a second inlet / outlet 17 are provided on the outer casing 1, such that the gas outlet 16 is located above the second inlet / outlet 17. A float assembly 2 is provided inside the outer casing 1. The float assembly 2 moves with the rise and fall of the liquid level inside the outer casing 1, thereby realizing that the float assembly 2 moves in the vertical direction inside the outer casing 1. It can realize that the float assembly 2 opens the gas outlet 16 and closes the second inlet / outlet 17, opens the second inlet / outlet 17 and closes the gas outlet 16, or opens the gas outlet 16 and the second inlet / outlet 17 at the same time, thereby realizing automatic adjustment gas-liquid separation and achieving efficient gas-liquid separation under varying operating conditions.

[0126] Other components of the air conditioner according to embodiments of the present invention, such as fan assemblies and their operation, are known to those skilled in the art and will not be described in detail here.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0128] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas-liquid separator, characterized in that, include: The housing has a first inlet / outlet, a gas outlet, and a second inlet / outlet. The gas outlet is located on the top wall of the housing, the second inlet / outlet is located on the bottom wall of the housing, and the first inlet / outlet is located on the peripheral wall of the housing. A float assembly is movably disposed within the housing in the vertical direction, and the float assembly is capable of blocking or opening the second inlet / outlet and blocking or opening the gas outlet.

2. The gas-liquid separator according to claim 1, characterized in that, The inner peripheral wall of the outer shell is provided with a spiral structure, and the spiral structure and the inner peripheral wall of the outer shell together define a spiral groove extending in the vertical direction, and the first inlet and outlet penetrate the bottom wall of the spiral groove.

3. The gas-liquid separator according to claim 2, characterized in that, The first inlet / outlet is located at the upper end of the spiral groove.

4. The gas-liquid separator according to claim 2, characterized in that, The lower end of the spiral groove has a baffle plate, which is used to block the lower end of the spiral groove.

5. The gas-liquid separator according to claim 2, characterized in that, The inner diameter of the spiral structure is d5, which is 20mm-40mm. And / or, the height of the spiral structure is L1, where L1 is 16mm-20mm; And / or, the pitch of the spiral structure is L6, the inner diameter of the first inlet and outlet is d1, and L6 / d1 is 1-1.6; And / or, the height of the spiral structure is L1, the pitch of the spiral structure is L6, and L1 / L6 is 0.8-2.

5.

6. The gas-liquid separator according to claim 1, characterized in that, The extension direction of the first inlet / outlet is tangential to the inner peripheral wall of the outer casing.

7. The gas-liquid separator according to claim 1, characterized in that, The upper end of the float assembly is connected to a first limiting shaft, which is adapted to pass through the gas outlet.

8. The gas-liquid separator according to claim 7, characterized in that, The length of the first limiting shaft is L51, which is 20mm-30mm.

9. The gas-liquid separator according to claim 1, characterized in that, The lower end of the float assembly is connected to a second limiting shaft, which is adapted to pass through the second inlet / outlet.

10. The gas-liquid separator according to claim 9, characterized in that, The length of the second limiting shaft is L52, which is 20mm-30mm.

11. The gas-liquid separator according to claim 1, characterized in that, The float assembly includes: Float; A first sealing head, located above and connected to the float, is used to block or open the gas outlet; The second sealing head, located below and connected to the float, is used to block or open the second inlet / outlet. When the first sealing head blocks the gas outlet, the second sealing head opens the second inlet / outlet; when the second sealing head blocks the second inlet / outlet, the first sealing head opens the gas outlet.

12. The gas-liquid separator according to claim 11, characterized in that, The first sealing head and the float are connected by a first connecting shaft; And / or, the second sealing head and the float are connected by a second connecting shaft.

13. The gas-liquid separator according to claim 11, characterized in that, The first sealing head includes a first sealing section, the cross-sectional area of ​​which gradually increases from top to bottom; And / or, the second sealing head includes a second sealing section, the cross-sectional area of ​​which gradually increases from bottom to top.

14. The gas-liquid separator according to claim 11, characterized in that, The float is cylindrical.

15. The gas-liquid separator according to claim 14, characterized in that, The diameter of the float is D1, where D1 is 25mm-45mm; And / or, the height of the float is L2, where L2 is 20mm-30mm.

16. The gas-liquid separator according to claim 11, characterized in that, The ratio of the density of the float to the density of the liquid separated by the gas-liquid separator is 0.5-0.

7.

17. The gas-liquid separator according to claim 11, characterized in that, When the first sealing head completely blocks the gas outlet, the first sealing head has a first position flush with the lower end of the gas outlet. When the second sealing head completely blocks the second inlet and outlet, the second sealing head has a second position flush with the upper end of the second inlet and outlet. The distance between the first position and the second position is L4. The vertical distance between the lower end of the gas outlet and the upper end of the second inlet and outlet is L3. L4 < L3, and L4 is 90mm-100mm.

18. The gas-liquid separator according to claim 1, characterized in that, The inner diameter of the first inlet / outlet is d1, where d1 is 6mm-20mm; And / or, the minimum inner diameter of the gas outlet is d2, where d2 is 3mm-6mm; And / or, the inner diameter of the second inlet / outlet is d3, where d3 is 6mm-10mm; And / or, the inner diameter of the outer shell is d4, where d4 is 40mm-60mm; And / or, the vertical distance between the lower end of the gas outlet and the upper end of the second inlet / outlet is L3, where L3 is 105mm-115mm.

19. An air conditioning system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A reversing assembly having a first port, a second port, a third port, and a fourth port, wherein one of the first port, the second port, and the third port is connected, and the fourth port is connected to the other of the second port and the third port; the first port is connected to the exhaust port, and the fourth port is connected to the return port. An outdoor heat exchanger, one end of which is connected to the second port; An indoor heat exchanger, one end of which is connected to the third port; According to any one of claims 1-18, in the gas-liquid separator, the other end of the indoor heat exchanger is connected to the first inlet and outlet, the other end of the outdoor heat exchanger is connected to the second inlet and outlet, and the gas outlet is connected to the second outlet.

20. The air conditioning system according to claim 19, characterized in that, A one-way valve is provided between the gas outlet and the second port, and the one-way valve only allows the flowing medium to flow from the gas outlet to the second port.

21. An air conditioner, characterized in that, Including the air conditioning system according to claim 19 or 20.

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