Liquid separation device and air conditioning unit

Abstract

The utility model provides a liquid separation device and an air conditioning unit. The liquid separation device comprises a communicating pipe; a liquid separation shell; and a flow equalizing plate. According to the liquid separation device and the air conditioning unit, the flow equalizing plate is movably arranged in the communicating pipe, the flow equalizing plate can move into the communicating pipe to change the flow area of the communicating pipe when the liquid separation device is needed for flow separation, the flow speed of a refrigerant is changed through the change of the flow area, and the atomization phenomenon is generated; according to the liquid separation device, the liquid can be uniformly mixed in the process of flowing into the liquid separation shell, and finally flows to all the liquid separation openings for liquid separation under the buffering action of the liquid separation shell, so that the liquid separation uniformity of the liquid separation device is effectively improved; the flow equalizing plate can be moved out of the communicating pipe to keep the flow area of the communicating pipe to be maximum, so that the flow equalizing plate is prevented from generating resistance to the flowing of the refrigerant, the problem of overlarge pressure drop of the air collecting pressure is avoided, and the heat exchange performance of the air conditioning unit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning structures, in particular to a liquid separation device and an air-conditioning unit. Background Art

[0002] The liquid separation structure is a common structure in air conditioning systems. It is mainly used to evenly distribute the refrigerant to the heat exchanger before it enters the heat exchanger to ensure uniform heat exchange. The liquid separation structure is also used in air-cooled screw heat pump units. In heating conditions, the liquid refrigerant passes through the liquid separation structure for equalization, and then the refrigerant is distributed to each heat exchanger. In cooling conditions, the gaseous refrigerant in each path is collected and enters the throttling device.

[0003] However, the liquid separation structure in the prior art adopts a diversion chamber with a larger flow area and a baffle fixed in the diversion chamber to improve the mixing effect and diversion effect of the refrigerant. Under heating conditions, the mixing effect of the baffle on the refrigerant is poor, and the fluid flowing into the diversion chamber will still affect the fluid at the liquid separation port. There is still a problem of uneven liquid separation. Under cooling conditions, the liquid separation structure only needs to play a role of collecting flow, but the presence of the baffle will produce a large resistance to the flow of the refrigerant, seriously affecting the heat exchange performance of the air-conditioning unit. Utility Model Content

[0004] In order to solve the technical problems in the prior art that the liquid separation structure has uneven liquid separation under heating conditions and has resistance to the flow of refrigerant under cooling conditions, thereby affecting the heat exchange performance of the air-conditioning unit, a liquid separation device and an air-conditioning unit are provided with a flow equalizing plate and can adjust the flow area of ​​a connecting pipe to improve the heat exchange performance.

[0005] A liquid separation device, comprising:

[0006] Connecting pipe;

[0007] A liquid separation housing, the liquid separation housing is connected to the connecting pipe, and the liquid separation housing is provided with at least two liquid separation ports;

[0008] A flow balancing plate, wherein the flow balancing plate is provided with a connecting hole, and the flow area of ​​the connecting hole is smaller than the flow area of ​​the connecting pipe;

[0009] The flow balancing plate is movably disposed on the connecting tube, and the flow balancing plate has a first state in which it is located within the flow channel of the connecting tube so that the effective flow area of ​​the connecting tube is the flow area of ​​the connecting hole, and the flow balancing plate also has a second state in which it is located outside the flow channel of the connecting tube so that the effective flow area of ​​the connecting tube is the flow area of ​​the connecting tube.

[0010] The connecting pipe is provided with an avoidance shell, which is connected to the connecting pipe, and when the flow balancing plate is in the second state, the flow balancing plate is located in the avoidance shell; when the flow balancing plate is in the first state, the flow balancing plate is located in the connecting pipe.

[0011] The side wall of the communicating pipe protrudes toward the peripheral side of the communicating pipe to form the avoidance housing.

[0012] The liquid separation device further comprises a sliding structure, part of the sliding structure is arranged in the connecting pipe, and the remaining part of the sliding structure is arranged in the avoidance shell, and the flow equalizing plate is arranged on the sliding structure.

[0013] A first slide groove is arranged on the inner wall of the connecting pipe, and a second slide groove is arranged on the inner wall of the avoidance shell. The first slide groove and the second slide groove are connected with each other to form a limiting slide groove. A slider is arranged on the flow equalizing plate, and the slider is movably arranged in the limiting slide groove. The slider and the limiting slide groove constitute the sliding structure.

[0014] A limiting structure is provided on the inner wall of the connecting pipe, and when the flow balancing plate is in the first state, the flow balancing plate abuts against the limiting structure.

[0015] A buffer structure is arranged between the limiting structure and the current balancing plate.

[0016] The liquid separation device also includes a reset mechanism, which is arranged on the connecting pipe and can drive the flow equalizing plate to switch to the first state; or, the reset mechanism can make the flow equalizing plate have an angle with the refrigerant flow direction in the connecting pipe.

[0017] When the flow balancing plate is in the first state, there is a distance between the flow balancing plate and the liquid separation housing.

[0018] The liquid separation housing has a first end surface and a second end surface, the liquid separation ports are all located on the first end surface of the liquid separation housing, and the connecting pipe is connected to the liquid separation housing through the second end surface of the liquid separation housing.

[0019] The liquid separation device is applied to an air conditioning unit, and the air conditioning unit has a cooling mode and a heating mode;

[0020] When the air conditioning unit is in the heating mode, the flow equalizing plate is in the first state;

[0021] When the air-conditioning unit is in the cooling mode, the flow equalizing plate is in the second state.

[0022] The central axis of the connecting pipe is collinear with the central axis of the liquid separation housing; and / or all the liquid separation ports are distributed in a ring shape with the central axis of the liquid separation housing as the axis.

[0023] An air conditioning unit comprises the above-mentioned liquid separation device.

[0024] The liquid separation device and air-conditioning unit provided by the utility model have a flow equalizing plate movably arranged in the connecting pipe. When the liquid separation device is needed to perform flow separation, the flow equalizing plate can be moved into the connecting pipe to change the flow area of ​​the connecting pipe. The change in the flow area is used to change the flow rate of the refrigerant and produce atomization, so that it can be evenly mixed in the process of flowing into the liquid separation shell, and then finally flow to all liquid separation ports for liquid separation under the buffering effect of the liquid separation shell, thereby effectively improving the liquid separation uniformity of the liquid separation device. At the same time, when the liquid separation device is not needed to perform flow separation, the flow equalizing plate can be moved out of the connecting pipe to keep the flow area of ​​the connecting pipe at a maximum, thereby avoiding the flow equalizing plate from generating resistance to the flow of the refrigerant and avoiding the problem of excessive gas collection pressure drop, thereby improving the heat exchange performance of the air-conditioning unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a liquid separation device provided in an embodiment of the utility model;

[0026] Figure 2 A cross-sectional view of a flow balancing plate of a liquid separation device provided in an embodiment of the utility model when in a first state;

[0027] Figure 3 for Figure 2 A local schematic diagram of the A;

[0028] Figure 4 A cross-sectional view of a flow balancing plate of a liquid separation device provided in an embodiment of the utility model when the flow balancing plate is in a second state;

[0029] Figure 5 A schematic diagram of the structure of the flow equalizing plate of the liquid separation device provided in an embodiment of the utility model when it is not squeezed by the refrigerant;

[0030] Figure 6 for Figure 5 A partial schematic diagram of point B;

[0031] Figure 7 A cross-sectional view of a connecting pipe and an avoidance housing of a liquid separation device provided in an embodiment of the utility model;

[0032] Figure 8 A schematic diagram of the structure of a flow balancing plate and a slider of a liquid separation device provided in an embodiment of the utility model;

[0033] Fig. 9A cross-sectional view of a limiting slide groove and an avoidance housing of a liquid separation device provided in an embodiment of the utility model;

[0034] In the figure:

[0035] 1. Connecting pipe; 2. Liquid separation housing; 21. Liquid separation port; 3. Flow equalizing plate; 31. Connecting hole; 4. Avoiding housing; 51. Limiting slide groove; 52. Sliding block; 11. Limiting structure; 12. Buffer structure; 6. Reset mechanism; 7. Spacing. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The liquid separation structure is a common structure in air-conditioning systems. It is mainly used to evenly distribute the refrigerant to the heat exchanger before the refrigerant enters the heat exchanger to ensure uniform heat exchange. The liquid separation structure is also used in air-cooled screw heat pump units. In heating conditions, the liquid refrigerant passes through the liquid separation structure for equalization, and then the refrigerant is distributed to each heat exchanger. In cooling conditions, the gaseous refrigerants in each path are collected and enter the throttling device. However, the liquid separation structure in the prior art uses a diversion cavity with a larger flow area and a baffle fixed in the diversion cavity to improve the mixing and diversion effects of the refrigerant. The baffle has a poor mixing effect on the refrigerant under heating conditions, and the fluid flowing into the diversion cavity will still affect the fluid at the liquid separation port. There is still a problem of uneven liquid separation. In cooling conditions, the liquid separation structure only needs to play a role in collecting flow, but the presence of the baffle will produce a large resistance to the flow of the refrigerant, seriously affecting the heat exchange performance of the air-conditioning unit. To this end, the present application provides a method such as Figures 1 to 9The liquid separation device shown includes: a connecting pipe 1; a liquid separation shell 2, the liquid separation shell 2 is connected to the connecting pipe 1, and the liquid separation shell 2 is provided with at least two liquid separation ports 21; a flow equalizing plate 3, the flow equalizing plate 3 is provided with a connecting hole 31, and the flow area of ​​the connecting hole 31 is smaller than the flow area of ​​the connecting pipe 1; the flow equalizing plate 3 is movably arranged on the connecting pipe 1, and the flow equalizing plate 3 has a first state of being located within the flow channel of the connecting pipe 1 so that the effective flow area of ​​the connecting pipe 1 is the flow area of ​​the connecting hole 31, and the flow equalizing plate 3 also has a second state of being located outside the flow channel of the connecting pipe 1 so that the effective flow area of ​​the connecting pipe 1 is the flow area of ​​the connecting pipe 1. The equalizing plate 3 is movably arranged in the connecting pipe 1. When the liquid separation device is required to perform flow separation, the equalizing plate 3 can be moved into the connecting pipe 1 to change the flow area of ​​the connecting pipe 1, that is, at this time, the equalizing plate 3 switches to the first state, and the flow area of ​​the refrigerant suddenly shrinks, so that the flow rate of the refrigerant increases and atomization occurs, thereby forming a mist area between the equalizing plate 3 and the liquid separation shell 2, so that the refrigerant is evenly mixed, and then can be evenly mixed in the process of flowing into the liquid separation shell 2, and then finally flows to all the liquid separation ports 21 for liquid separation under the buffering effect of the liquid separation shell 2, which effectively improves the liquid separation uniformity of the liquid separation device. At the same time, when the liquid separation device is not required to perform flow separation, the equalizing plate 3 can be moved outside the flow channel of the connecting pipe 1, so as to maintain the flow area of ​​the connecting pipe 1 to the maximum, that is, at this time, the equalizing plate 3 switches to the second state, thereby avoiding the equalizing plate 3 from generating resistance to the flow of the refrigerant, avoiding the problem of excessive gas collection pressure drop, thereby improving the heat exchange performance of the air-conditioning unit. The flow channel of the connecting tube 1 refers to the channel formed by the structure of the connecting tube 1 itself. When the flow equalizing plate 3 is not set, the refrigerant flows through the flow channel of the connecting tube 1. The flow area of ​​the connecting tube is the cross-sectional area of ​​the flow channel of the connecting tube 1. When the flow equalizing plate 3 is in the second state, the flow equalizing plate 3 is located outside the flow channel of the connecting tube 1. At this time, the flow equalizing plate 3 will not change the flow area of ​​the connecting tube 1. When the flow equalizing plate 3 is in the first state, the flow equalizing plate 3 moves into the flow channel of the connecting tube 1. At this time, the flow equalizing plate 3 will block or partially block the flow channel of the connecting tube, so that the refrigerant in the connecting tube can only be connected through the connecting hole 31 on the flow equalizing plate 3, thereby realizing the adjustment of the effective flow area of ​​the connecting tube.

[0042] In order to prevent the equalizing plate 3 from being still located in the connecting tube 1 when it is in the second state and thus affecting the flow area of ​​the connecting tube 1, a avoidance shell 4 is provided on the connecting tube 1. The avoidance shell 4 is connected to the connecting tube 1, and when the equalizing plate 3 is in the second state, the equalizing plate 3 is located in the avoidance shell 4; when the equalizing plate 3 is in the first state, the equalizing plate 3 is located in the connecting tube 1. When a liquid separation device is required to separate liquid, the equalizing plate 3 is moved from the avoidance shell 4 to the connecting tube 1 to achieve a change in the flow area of ​​the connecting tube 1, thereby ensuring a liquid separation effect. When a liquid separation device is not required to separate liquid, the equalizing plate 3 is moved from the connecting tube 1 to the avoidance shell 4 for storage, so that the equalizing plate 3 cannot affect the flow area of ​​the connecting tube 1, thereby reducing the flow resistance of the refrigerant and achieving the purpose of improving the heat exchange performance of the air-conditioning unit. As an implementation method, Figure 1 As shown, the avoidance shell 4 is a pipeline with the same shape as the connecting pipe 1. A hole is opened on the side wall of the connecting pipe 1, and then one end of the avoidance shell 4 is connected to the hole. Then, the connection position of the avoidance shell 4 and the connecting pipe 1 is sealed, and the other end of the avoidance shell 4 is closed, so as to form a space for accommodating the equalizing plate 3. In order to reduce the size of the avoidance shell 4, the equalizing plate 3 can be moved in the avoidance shell 4 and the connecting pipe 1 in a rotating form, that is, when the equalizing plate 3 is in the first state, the plane where the equalizing plate 3 is located is perpendicular to the fluid flow direction in the connecting pipe 1, and when the equalizing plate 3 is in the second state, the plane where the equalizing plate 3 is located is parallel to the fluid flow direction in the connecting pipe 1, that is, at this time, the size of the avoidance shell 4 can be only the thickness size of the equalizing plate 3. In order to make the equalizing plate 3 reliably in the avoidance shell 4 and the connecting pipe 1, the central axis of the avoidance shell 4 and the central axis of the connecting pipe 1 have an angle, and the existence of the angle is used to ensure the reliable rotation of the equalizing plate 3.

[0043] Optionally, the side wall of the connecting pipe 1 protrudes toward the peripheral side of the connecting pipe 1 to form the avoidance shell 4. This ensures the connection reliability and relative sealing effect between the avoidance shell 4 and the connecting pipe 1, and also enables the flow equalizing plate 3 to move more smoothly between the connecting pipe 1 and the avoidance shell 4, ensuring that the state adjustment of the flow equalizing plate 3 is reliable.

[0044] The liquid separation device also includes a sliding structure, part of which is arranged in the connecting pipe 1, and the remaining part of which is arranged in the avoidance shell 4, and the flow equalizing plate 3 is arranged on the sliding structure. The sliding structure is used to limit the moving path of the flow equalizing plate 3 to ensure that the flow equalizing plate 3 can move reliably between the first state and the second state. In particular, when the flow equalizing plate 3 switches its state by rotating, part of the structure of the flow equalizing plate 3 is still located in the connecting pipe 1, that is, the flow equalizing plate 3 cannot completely enter the avoidance shell 4 at this time. In order to further reduce the influence of the flow equalizing plate 3 on the flow area of ​​the connecting pipe 1, the flow equalizing plate 3 can slide and rotate at the same time, so that the flow equalizing plate 3 can enter the avoidance shell 4 in a sliding manner, and finally the flow equalizing plate 3 can completely enter the avoidance shell 4, thereby minimizing the influence on the flow area of ​​the connecting pipe 1 and effectively improving the heat exchange performance of the air-conditioning unit.

[0045] Specifically, a first slide groove is provided on the inner wall of the connecting pipe 1, and a second slide groove is provided on the inner wall of the avoidance housing 4. The first slide groove and the second slide groove are connected to each other to form a limiting slide groove 51. A slider 52 is provided on the flow equalizing plate 3. The slider 52 is movably provided in the limiting slide groove 51. The slider 52 and the limiting slide groove 51 constitute the sliding structure. In the process of position adjustment of the flow equalizing plate 3, the slider 52 can slide from the first slide groove into the second slide groove, and can also slide from the second slide groove into the first slide groove, so as to ensure the reliable movement of the flow equalizing plate 3. Among them, the limiting slide groove 51 has an opening toward the flow equalizing plate 3, and the bottom width of the limiting slide groove 51 is greater than the width of the opening, so that the slider 52 can be effectively limited in the limiting slide groove 51, and the position of the flow equalizing plate 3 is further limited, so as to ensure that the flow equalizing plate 3 can only move along the path set by the limiting slide groove 51 when switching between the first state and the second state, so as to ensure the reliability of the use of the flow equalizing plate 3 and the liquid separation device. Preferably, the cross section of the limiting sliding groove 51 is “T”-shaped, and the cross section of the sliding block 52 matches the cross section of the limiting sliding groove 51 .

[0046] Since the refrigerant in the connecting tube 1 will impact the flow equalizing plate 3 when the flow equalizing plate 3 is in the first state, the flow equalizing plate 3 will be under great pressure at this time. In order to ensure that the flow equalizing plate 3 is reliably positioned in the connecting tube 1, a limiting structure 11 is provided on the inner wall of the connecting tube 1. When the flow equalizing plate 3 is in the first state, the flow equalizing plate 3 abuts against the limiting structure 11. By limiting the flow equalizing plate 3 with the limiting structure 11, the squeezing pressure of the refrigerant on the flow equalizing plate 3 can be directly transmitted to the limiting structure 11 and offset, so that the flow equalizing plate 3 can be reliably stationary in the connecting tube 1, thereby ensuring that the flow equalizing plate 3 can always change the flow area of ​​the connecting tube 1, so that the refrigerant can only flow through the connecting hole 31 on the flow equalizing plate 3, thereby ensuring the reliability of the cross-sectional contraction to ensure the liquid separation effect of the liquid separation device. Figure 1 As shown, the cross-sections of the connecting tube 1 and the flow equalizing plate 3 are both circular, wherein the inner diameter of the connecting tube 1 is slightly larger than the diameter of the flow equalizing plate 3, and the limiting structure 11 is an annular protrusion on the inner wall of the connecting tube 1, and the inner diameter of the annular protrusion is smaller than the diameter of the flow equalizing plate 3.

[0047] A buffer structure 12 is provided between the limiting structure 11 and the equalizing plate 3. The buffer structure 12 is used to avoid the hard collision between the equalizing plate 3 and the limiting structure 11 to generate noise, and the buffer structure 12 can also be used to seal the gap that may exist between the limiting structure 11 and the equalizing plate 3, further ensuring that the refrigerant can only flow through the connecting hole 31 on the equalizing plate 3, thereby ensuring the liquid separation effect of the liquid separation device.

[0048] The liquid separation device further includes a reset mechanism 6, which is disposed on the connecting pipe 1, and the reset mechanism 6 can drive the flow equalizing plate 3 to switch to the first state. When the air-conditioning unit where the liquid separation device is located is in a shutdown state, the flow equalizing plate 3 can be driven by the reset mechanism 6 to switch to the first state, so as to ensure that when the air-conditioning unit is started in a heating mode, the flow equalizing plate 3 can directly participate in flow equalization and liquid separation in the form of the first state, thereby ensuring the reliability of the air-conditioning unit. When the air-conditioning unit is heating, the refrigerant will flow from the connecting pipe 1 into the liquid separation shell 2, and finally be diverted to the corresponding heat exchange tube through the liquid separation port 21 for heat exchange. At this time, the equalizing plate 3 is in the first state, and the refrigerant can be separated under the equalizing effect of the flow equalizing plate 3, ensuring the reliable heating of the air-conditioning unit. When the air-conditioning unit is cooling, the refrigerant will flow into the liquid separation shell 2 from the liquid separation port 21, and then continue to flow along the connecting pipe 1 away from the liquid separation shell 2. The refrigerant will squeeze the equalizing plate 3 toward the avoidance shell 4. At this time, although the equalizing plate 3 is in the first state, the squeezing effect of the refrigerant will still switch the equalizing plate 3 to the second state, so that the equalizing plate 3 can automatically switch states without manual and signal control, thereby improving the reliability and automation of the liquid separation device.

[0049] like Figure 5As shown, in order to reduce the resistance of the equalizing plate 3 to the refrigerant when the air-conditioning unit is started in a refrigeration condition, the reset mechanism 6 can drive the equalizing plate 3 to be arranged in the connecting pipe 1 in an inclined manner, that is, the reset mechanism 6 can make the equalizing plate 3 and the refrigerant flow direction in the connecting pipe 1 have an angle. At this time, when the air-conditioning unit is heating, the refrigerant will flow from the connecting pipe 1 to the liquid separation shell 2, and finally be diverted to the corresponding heat exchange tube through the liquid separation port 21 for heat exchange. At this time, the equalizing plate 3 is in the connecting pipe 1 in an inclined manner. When the refrigerant flows through the equalizing plate 3, it will bring the equalizing plate 3 to switch to the first state. Although the initial refrigerant cannot be diverted by the equalizing plate 3, However, the air-conditioning unit is in the startup stage and does not affect the heat exchange performance of the air-conditioning unit. The refrigerant can be smoothly separated under the equalizing effect of the equalizing plate 3, ensuring the reliable heating of the air-conditioning unit. When the air-conditioning unit is cooling, the refrigerant will flow into the liquid separation shell 2 from the liquid separation port 21, and then continue to flow along the connecting pipe 1 in the direction away from the liquid separation shell 2. The refrigerant will squeeze the equalizing plate 3 in the direction of the avoidance shell 4. At this time, the equalizing plate 3 is in an inclined state, but the squeezing effect of the refrigerant will still switch the equalizing plate 3 to the second state, so that the equalizing plate 3 can automatically switch the state without manual and signal control, thereby improving the reliability and automation of the liquid separation device. Preferably, the reset mechanism 6 is an elastic structure, preferably a spring, one end of the spring abuts on the avoidance shell 4, and the other end abuts on the slider 52.

[0050] When the flow balancing plate 3 is in the first state, there is a distance 7 between the flow balancing plate 3 and the liquid separation housing 2. That is, the flow balancing plate 3, the liquid separation housing 2 and the connecting pipe 1 together form a mist area at the distance 7, and the refrigerant enters the mist area after being accelerated and atomized through the connecting hole 31. The mist area can provide space for the full mixing of the refrigerant, ensuring that the refrigerant entering the liquid separation housing 2 is evenly mixed, thereby ensuring the liquid separation effect of the liquid separation device.

[0051] The liquid separation housing 2 has a first end face and a second end face, and the liquid separation ports 21 are all located on the first end face of the liquid separation housing 2, and the connecting pipe 1 is connected to the liquid separation housing 2 through the second end face of the liquid separation housing 2. At this time, the refrigerant flowing in the connecting pipe 1 needs to flow into the liquid separation housing 2 for buffering first, and then flow into all the liquid separation ports 21 at the same time to achieve uniform liquid separation. When the liquid separation device is arranged vertically, the liquid separation housing 2 is located above the connecting pipe 1, and the liquid separation ports 21 are all located on the top surface (first end face) of the liquid separation housing 2. The connecting pipe 1 is connected to the liquid separation housing 2 through the bottom surface (second end face) of the liquid separation housing 2, and the flow equalizing plate 3 is located below the liquid separation housing 2. In the process of the refrigerant flowing from the connecting pipe 1 into the liquid separation housing 2, the liquid level in the liquid separation housing 2 gradually rises, and each liquid separation port 21 can obtain the refrigerant at the same time to ensure the uniformity of liquid separation. When the liquid separation device is arranged horizontally, the liquid separation shell 2 is located on one side of the connecting pipe 1. At this time, the refrigerant flowing in the connecting pipe flows into the liquid separation shell 2 from one side of the liquid separation shell 2 and is buffered in the liquid separation shell 2, and then flows into all the liquid separation ports 21 at the same time to achieve uniform liquid separation.

[0052] Taking the liquid separation device being set vertically as an example, and the liquid separation device having a reset mechanism 6, when the flow equalizing plate 3 switches from the second state to the first state, the flow equalizing plate 3 needs to flip and move upward to enter the flow channel of the connecting pipe 1. When there is no refrigerant flowing in the connecting pipe 1, the gravity of the flow equalizing plate 3 can drive the flow equalizing plate 3 to move downward until the gravity of the flow equalizing plate 3 and the supporting force of the reset mechanism 6 are balanced with each other, so that the flow equalizing plate 3 can be in the connecting pipe 1 in an inclined manner, which is convenient for the refrigerant to switch the state of the flow equalizing plate 3.

[0053] The liquid separation device is applied to an air conditioning unit, and the air conditioning unit has a cooling mode and a heating mode;

[0054] When the air-conditioning unit is in the heating mode, the equalizing plate 3 is in the first state; when the air-conditioning unit is heating, the refrigerant will flow from the connecting pipe 1 into the liquid separation shell 2, and finally be diverted to the corresponding heat exchange tube through the liquid separation port 21 for heat exchange. At this time, the equalizing plate 3 is in the first state, and the flow area of ​​the refrigerant suddenly shrinks, so that the flow rate of the refrigerant increases and atomization occurs, thereby forming a mist area between the equalizing plate 3 and the liquid separation shell 2, so that the refrigerant is evenly mixed, and then can be evenly mixed in the process of flowing into the liquid separation shell 2, and then finally flow to all the liquid separation ports 21 for liquid separation under the buffering effect of the liquid separation shell 2, so that the refrigerant can be evenly distributed to different heat exchange tubes in the air-conditioning unit for heating, ensuring reliable heating of the air-conditioning unit;

[0055] When the air-conditioning unit is in the cooling mode, the flow equalizing plate 3 is in the second state. When the air-conditioning unit is cooling, the refrigerant will flow into the liquid separation shell 2 from the liquid separation port 21, and then continue to flow along the connecting pipe 1 in the direction away from the liquid separation shell 2. The refrigerant will squeeze the flow equalizing plate 3 in the direction of the avoidance shell 4. Although the flow equalizing plate 3 is in the first state at this time, the effect of refrigerant squeezing will still switch the flow equalizing plate 3 to the second state, so that the flow equalizing plate 3 can automatically switch states without manual and signal control. At this time, the flow equalizing plate 3 is outside the flow channel of the connecting pipe 1, and the flow equalizing plate 3 will not generate resistance to the flow of the refrigerant, thereby avoiding the problem of excessive gas collection pressure drop, improving the reliability and automation of the liquid separation device, and improving the heat exchange performance of the air-conditioning unit.

[0056] The central axis of the connecting tube 1 is collinear with the central axis of the liquid separation shell 2. The refrigerant flowing into the liquid separation shell 2 in the connecting tube 1 can flow into the middle of the liquid separation shell 2 and flow from the middle of the liquid separation shell 2 to the side wall of the liquid separation shell 2. Since the central axes of the connecting tube 1 and the liquid separation shell 2 are collinear, the distance from the position where the refrigerant flows into the liquid separation shell 2 to any position of the side wall of the liquid separation shell 2 is basically equal, so that the refrigerant can be evenly filled into the liquid separation shell 2 and finally evenly flow into all the liquid separation ports 21, thereby maximizing the liquid separation uniformity of the liquid separation device.

[0057] Similarly, all of the liquid separation ports 21 are distributed in a ring shape with the central axis of the liquid separation shell 2 as the axis, and the refrigerant flows into the liquid separation shell 2 from the central axis position of the liquid separation shell 2. All of the liquid separation ports 21 are distributed in a ring shape with the central axis of the liquid separation shell 2. At this time, the distances between the liquid separation ports 21 and the inflow position of the refrigerant are equal, thereby ensuring that the flow rate and composition of the refrigerant flowing to the liquid separation ports 21 are the same, thereby maximizing the uniformity of liquid separation of the liquid separation device.

[0058] An air conditioning unit comprises the above-mentioned liquid separation device.

[0059] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A liquid separation device, characterized in that: include: Connecting pipe (1); A liquid separation housing (2), the liquid separation housing (2) being in communication with the connecting pipe (1), and the liquid separation housing (2) being provided with at least two liquid separation ports (21); A flow balancing plate (3), wherein the flow balancing plate (3) is provided with a connecting hole (31), and the flow area of ​​the connecting hole (31) is smaller than the flow area of ​​the connecting pipe (1); The flow balancing plate (3) is movably arranged on the connecting tube (1), and the flow balancing plate (3) has a first state in which it is located within the flow channel of the connecting tube (1) so that the effective flow area of ​​the connecting tube (1) is equal to the flow area of ​​the connecting hole (31), and the flow balancing plate (3) also has a second state in which it is located outside the flow channel of the connecting tube (1) so that the effective flow area of ​​the connecting tube (1) is equal to the flow area of ​​the connecting tube (1).

2. The liquid separation device according to claim 1, characterized in that: The connecting pipe (1) is provided with an avoidance shell (4), the avoidance shell (4) is connected to the connecting pipe (1), and when the flow balancing plate (3) is in the second state, the flow balancing plate (3) is located in the avoidance shell (4); when the flow balancing plate (3) is in the first state, the flow balancing plate (3) is located in the connecting pipe (1).

3. The liquid separation device according to claim 2, characterized in that: The side wall of the connecting pipe (1) protrudes toward the peripheral side of the connecting pipe (1) to form the avoidance housing (4).

4. The liquid separation device according to claim 2, characterized in that: The liquid separation device further comprises a sliding structure, part of which is arranged in the connecting pipe (1), and the remaining part of which is arranged in the avoidance shell (4), and the flow equalizing plate (3) is arranged on the sliding structure.

5. The liquid separation device according to claim 4, characterized in that: A first slide groove is arranged on the inner wall of the connecting pipe (1), a second slide groove is arranged on the inner wall of the avoidance shell (4), the first slide groove and the second slide groove are connected to each other to form a limiting slide groove (51), a slider (52) is arranged on the flow equalizing plate (3), the slider (52) is movably arranged in the limiting slide groove (51), and the slider (52) and the limiting slide groove (51) constitute the sliding structure.

6. The liquid separation device according to claim 1, characterized in that: A limiting structure (11) is provided on the inner wall of the connecting pipe (1); when the flow balancing plate (3) is in the first state, the flow balancing plate (3) abuts against the limiting structure (11).

7. The liquid separation device according to claim 6, characterized in that: A buffer structure (12) is provided between the limiting structure (11) and the current equalizing plate (3).

8. The liquid separation device according to claim 1, characterized in that: The liquid separation device further comprises a reset mechanism (6), wherein the reset mechanism (6) is arranged on the connecting pipe (1), and the reset mechanism (6) can drive the flow equalizing plate (3) to switch to the first state; or, the reset mechanism (6) can make the flow equalizing plate (3) have an angle with the refrigerant flow direction in the connecting pipe (1).

9. The liquid separation device according to claim 1, characterized in that: When the flow balancing plate (3) is in the first state, there is a distance (7) between the flow balancing plate (3) and the liquid separation housing (2).

10. The liquid separation device according to claim 1, characterized in that: The liquid separation housing (2) has a first end face and a second end face, the liquid separation ports (21) are all located on the first end face of the liquid separation housing (2), and the connecting pipe (1) is connected to the liquid separation housing (2) through the second end face of the liquid separation housing (2).

11. The liquid separation device according to claim 1, characterized in that: The liquid separation device is applied to an air conditioning unit, and the air conditioning unit has a cooling mode and a heating mode; When the air conditioning unit is in the heating mode, the flow equalizing plate (3) is in the first state; When the air conditioning unit is in the cooling mode, the flow equalizing plate (3) is in the second state.

12. The liquid separation device according to claim 1, characterized in that: The central axis of the connecting pipe (1) is colinear with the central axis of the liquid separation housing (2); and / or all the liquid separation ports (21) are distributed in a ring shape with the central axis of the liquid separation housing (2) as the axis.

13. An air conditioning unit, characterized in that: The invention comprises the liquid separation device according to any one of claims 1 to 12.

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