Gas-liquid separator

Abstract

The utility model relates to the field of refrigeration equipment, and discloses a gas-liquid separator which comprises a shell provided with a containing cavity; the variable-volume assembly is used for forming a first variable-volume chamber and a second variable-volume chamber in the accommodating cavity; the first variable volume chamber is close to the top of the shell; a communicating pipeline is arranged on the variable-volume assembly, and a first balance airflow hole is formed in the communicating pipeline; a pipeline outlet of the refrigerant upper inlet pipe is communicated with the first variable volume chamber; a pipeline outlet of the lower refrigerant inlet pipe is communicated with a communicating pipeline on the variable-volume assembly; the refrigerant lower inlet pipe stretches out and draws back along with movement of the variable-capacity assembly. The gas-liquid separator can dynamically adjust the volume of the first variable-volume chamber through which a refrigerant can flow according to the refrigerant required by the air conditioning system under different working conditions, so as to reduce the accumulation of the refrigerant in the gas-liquid separator.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration equipment, and in particular to a gas-liquid separator. BACKGROUND

[0002] At present, a fixed volume gas-liquid separator is generally used in an air conditioning system, so that the overall volume of the air conditioning system is in a fixed state. When the air conditioning system is in different working conditions, the required amount of refrigerant in the refrigerant circulation pipeline is different. Generally, when the air conditioning system is filled with refrigerant, the refrigerant is filled according to the maximum demand of the system, and when the required amount of refrigerant in the refrigerant circulation pipeline is reduced, the excess refrigerant is stored in the gas-liquid separator. However, storing the refrigerant in the gas-liquid separator may cause too much refrigerant on the low-pressure side, and too much refrigerant on the low-pressure side is prone to cause the reduction of the suction dryness of the compressor, thereby causing the risk of liquid hammer of the compressor.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION

[0004] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important elements or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0005] The gas-liquid separator provided by the embodiments of the present application can reduce the accumulation of refrigerant in the gas-liquid separator.

[0006] The embodiment of the present application provides a gas-liquid separator, which comprises: a shell provided with a containing cavity; a variable volume assembly, which is used for forming a first variable volume cavity and a second variable volume cavity in the containing cavity; the first variable volume cavity is close to the top of the shell; and the variable volume assembly is provided with a communication pipeline, and the communication pipeline is provided with a first balance gas flow hole; a refrigerant upper inlet pipe, a pipeline outlet of the refrigerant upper inlet pipe is communicated with the first variable volume cavity; a refrigerant lower inlet pipe, a pipeline outlet of the refrigerant lower inlet pipe is communicated with the communication pipeline on the variable volume assembly; the refrigerant lower inlet pipe is telescopic with the movement of the variable volume assembly; refrigerant flowing out of the refrigerant upper inlet pipe cannot directly flow into the pipeline inlet of the refrigerant lower inlet pipe; a refrigerant outlet pipe, a pipeline inlet of the refrigerant outlet pipe is communicated with the communication pipeline on the variable volume assembly; a pipeline outlet of the refrigerant outlet pipe is out of the shell from the first variable volume cavity; the refrigerant outlet pipe is telescopic with the movement of the variable volume assembly; the refrigerant outlet pipe is provided with a second balance gas flow hole; and a driving assembly, which is used for driving the variable volume assembly to move, so as to change the volume of the first variable volume cavity and the second variable volume cavity.

[0007] In the above embodiment, by arranging the variable volume assembly, the refrigerant outlet pipe and the refrigerant lower inlet pipe which are telescopic with the variable volume assembly, the volume of the first variable volume cavity through which the refrigerant flows can be changed through the structure. Thus, the volume of the first variable volume cavity through which the refrigerant flows in the gas-liquid separator can be dynamically adjusted according to the refrigerant required by the air conditioning system under different working conditions, so as to reduce the refrigerant accumulation in the gas-liquid separator. The pressure on the low pressure side of the air conditioning system can be balanced, so that the efficiency of the air conditioning system is less affected.

[0008] Further, the variable volume assembly is a piston assembly, which is arranged in the containing cavity along the axial direction of the containing cavity, the piston assembly and the shell form the first variable volume cavity and the second variable volume cavity, and the piston assembly is internally provided with the communication pipeline.

[0009] It can be understood that the piston assembly is a movable device. By arranging the piston assembly in the containing cavity, the containing cavity can be divided into different cavities by the piston assembly, and the volume of the cavity divided by the piston assembly can be changed by moving the piston assembly along the axial direction of the containing cavity, so as to change the volume of the cavity, and further to make the gas-liquid separator have the function of dynamically adjusting the volume of the first variable volume cavity through which the refrigerant flows in the gas-liquid separator according to the refrigerant required by the air conditioning system under different working conditions. Meanwhile, by internally arranging the communication pipeline in the piston assembly and connecting the communication pipeline with the refrigerant lower inlet pipe and the refrigerant outlet pipe, the separated gas can still flow smoothly in the gas-liquid separator during the movement of the piston assembly.

[0010] Further, a limiting platform is arranged in the accommodating cavity, and the limiting platform is used for limiting the moving range of the piston assembly.

[0011] It can be understood that although the refrigerant outlet pipe and the refrigerant lower inlet pipe can be telescoped, they cannot be telescoped infinitely. When the refrigerant outlet pipe or the refrigerant lower inlet pipe reaches the maximum limit of telescoping, continuous extrusion of the refrigerant outlet pipe or the refrigerant lower inlet pipe can cause damage to the refrigerant outlet pipe or the refrigerant lower inlet pipe. Therefore, in the case of inaccurate control of the driving assembly, the piston assembly can continuously extrude the refrigerant outlet pipe or the refrigerant lower inlet pipe, causing damage to the refrigerant outlet pipe or the refrigerant lower inlet pipe. By arranging the limiting platform, the movement of the piston assembly can be limited, thereby protecting the refrigerant outlet pipe and the refrigerant lower inlet pipe.

[0012] Further, the variable-volume assembly comprises: a bellows, which is a hollow pipe with a first open end and a second open end; the bellows is arranged in the accommodating cavity; an upper connecting plate, one side of the upper connecting plate is connected with the shell, and the other side of the upper connecting plate is used for sealing the first open end; a lower connecting plate, the lower connecting plate is used for sealing the second open end; and a communication pipe is arranged in the lower connecting plate.

[0013] In the above embodiment, since the bellows itself has the telescoping property, by arranging the upper connecting plate and the lower connecting plate to seal the bellows, a chamber for the refrigerant to flow through can be formed. At the same time, by the telescoping property of the bellows itself, by pushing the lower connecting plate, the volume of the chamber can be changed. Thus, the gas-liquid separator has the function of dynamically adjusting the volume of the first variable-volume chamber for the refrigerant to flow through according to the refrigerant required by the air conditioning system under different working conditions.

[0014] Further, the refrigerant lower inlet pipe comprises: a first lower inlet pipe, which is fixed on the variable-volume assembly; and a second lower inlet pipe, which is fixed on the first variable-volume chamber; the inner diameter of the pipe opening of the second lower inlet pipe is greater than the outer diameter of the pipe opening of the first lower inlet pipe, and the first lower inlet pipe is arranged in the second lower inlet pipe.

[0015] In the above embodiment, by arranging the second lower inlet pipe and the first lower inlet pipe with different inner and outer diameters of the pipe opening, and sleeving the first lower inlet pipe in the second lower inlet pipe, the first lower inlet pipe can move in the second lower inlet pipe to realize the telescoping of the refrigerant lower inlet pipe. Further, during the change of the volume of the first variable-volume chamber, there is a pipe for the separated gaseous refrigerant to flow through.

[0016] Further, the refrigerant outlet pipe comprises: a first outlet pipe fixed on the variable volume assembly; a second outlet pipe passing out of the shell from the first variable volume chamber; the inner diameter of the pipe opening of the second outlet pipe is larger than the outer diameter of the pipe opening of the first outlet pipe, and the first outlet pipe is arranged in the second outlet pipe.

[0017] In the above embodiment, by arranging the second outlet pipe and the first outlet pipe with different inner and outer diameters of the pipe opening, and sleeving the first outlet pipe in the second outlet pipe, the first outlet pipe can move in the second outlet pipe to realize the expansion and contraction of the refrigerant outlet pipe. Further, there is a pipeline for the separated gaseous refrigerant to flow in the process of changing the volume of the first variable volume chamber.

[0018] Further, the driving assembly comprises: a threaded base connected with the variable volume assembly; a screw rod connected with the threaded base; and a motor connected with the screw rod, the motor drives the screw rod to rotate to drive the variable volume assembly to move.

[0019] It can be understood that when the motor drives the screw rod to rotate, the threaded base will be subjected to an axial pushing force or pulling force due to the interaction of the threads, and this force enables the threaded base to move in the axial direction of the screw rod. Therefore, by arranging the threaded base to be connected with the variable volume assembly, the movement of the threaded base can drive the variable volume assembly to move, and thus the gas-liquid separator can dynamically adjust the volume of the first variable volume chamber available for the refrigerant to flow.

[0020] Further, the driving assembly comprises: a fluid pipeline in communication with the second variable volume chamber; the fluid pipeline is used to introduce or discharge fluid to the second variable volume chamber, and the fluid drives the variable volume assembly to move.

[0021] In the above embodiment, in the process of introducing fluid into the second variable volume chamber through the fluid pipeline, the introduced fluid will generate a pushing force on the variable volume assembly, thereby realizing the movement of the variable volume assembly, and thus the volume of the first variable volume chamber available for the refrigerant to flow in the gas-liquid separator can be dynamically adjusted.

[0022] Further, the driving assembly comprises: an elastic element; one end of the elastic element is connected with the bottom of the second variable volume chamber, and the other end of the elastic element is connected with the variable volume assembly; the elastic element deforms following the pressure in the first variable volume chamber to drive the variable volume assembly to move.

[0023] In the above embodiment, the pressure in the first variable volume chamber through which the refrigerant flows changes during use of the gas-liquid separator. When the pressure increases, the elastic element is pressed, and at this time the elastic element drives the variable volume assembly to move downward, thereby increasing the volume of the first variable volume chamber. If the pressure decreases, the elastic element returns to the initial state, and the elastic element drives the variable volume assembly to move upward, thereby decreasing the volume of the first variable volume chamber. Through the above method, the gas-liquid separator can dynamically adjust the volume of the first variable volume chamber through which the refrigerant flows.

[0024] Further, the driving assembly comprises a memory alloy, one end of the memory alloy is connected to the bottom of the second variable volume chamber, the other end of the memory alloy is connected to the variable volume assembly, and the memory alloy is deformed under the control of a heating temperature and the pressure in the first variable volume chamber to drive the variable volume assembly to move.

[0025] It can be understood that the memory alloy is deformed under an external force at a lower temperature, and after the external force is removed and the memory alloy is heated to above the phase transition temperature, the memory alloy can return to the original shape. Therefore, by controlling the heating temperature of the memory alloy, in combination with the change of the pressure in the first variable volume chamber through which the refrigerant flows during use of the gas-liquid separator, the memory alloy can be deformed to drive the variable volume assembly to move, thereby enabling the gas-liquid separator to dynamically adjust the volume of the first variable volume chamber through which the refrigerant flows.

[0026] Further, the gas-liquid separator further comprises a partition plate, the partition plate is fixed in the first variable volume chamber, located a first preset distance below the pipeline outlet of the refrigerant upper inlet pipe, for blocking the refrigerant flowing out of the pipeline outlet of the refrigerant upper inlet pipe, and the pipeline inlet of the refrigerant lower inlet pipe is arranged a second preset distance below the partition plate.

[0027] It can be understood that the refrigerant can mix with liquid refrigerant oil. The refrigerant oil is heavier and will sink to the bottom of the shell, and the gaseous refrigerant is lighter and will float to the top of the shell compared with the refrigerant oil. In the above embodiment, the partition plate is arranged between the pipeline outlet of the refrigerant upper inlet pipe and the pipeline inlet of the refrigerant lower inlet pipe, which can block the refrigerant oil mixed in the refrigerant from entering the pipeline inlet of the refrigerant lower inlet pipe. Since the refrigerant is lighter, the refrigerant floating on the upper layer can directly enter from the pipeline inlet of the refrigerant lower inlet pipe, thereby realizing gas-liquid separation. At the same time, due to the blocking effect of the partition plate, the refrigerant will impact on the partition plate, thereby accelerating the gas-liquid separation under the influence of temperature difference, surface tension and adhesion and the like.

[0028] Further, the refrigerant upper inlet pipe and the refrigerant lower inlet pipe are arranged staggered, and the pipeline outlet of the refrigerant upper inlet pipe is lower than the pipeline inlet of the refrigerant lower inlet pipe.

[0029] In the above embodiment, by staggering the upper refrigerant inlet pipe and the lower refrigerant inlet pipe, and by having the pipe outlet of the upper refrigerant inlet pipe lower than the pipe inlet of the lower refrigerant inlet pipe, the refrigeration oil is prevented from flowing into the pipe inlet of the lower refrigerant inlet pipe, thereby achieving gas-liquid separation.

[0030] The foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS

[0031] One or more embodiments are illustrated by way of example in the figures that are not intended to be limiting of the application as defined by the claims. The same numbers in different figures identify the same components. The drawings are not to scale (unless otherwise indicated). In the drawings:

[0032] Figure 1 is a cross-sectional view of a first gas-liquid separator according to an embodiment of the application;

[0033] Figure 2 is a connection diagram of a piston assembly according to an embodiment of the application;

[0034] Figure 3 is a cross-sectional view of a second gas-liquid separator according to an embodiment of the application;

[0035] Figure 4 is a cross-sectional view of a third gas-liquid separator according to an embodiment of the application;

[0036] Figure 5 is a cross-sectional view of a fourth gas-liquid separator according to an embodiment of the application.

[0037] REFERENCE NUMERALS:

[0038] 10: housing; 11: shell; 12: top cover; 13: base; 20: variable volume assembly; 21: piston assembly; 22: bellows; 23: upper connecting plate; 24: lower connecting plate; 30: upper refrigerant inlet pipe; 40: lower refrigerant inlet pipe; 41: first lower inlet pipe; 42: second lower inlet pipe; 50: refrigerant outlet pipe; 51: first outlet pipe; 52: second outlet pipe; 60: drive assembly; 61: fluid conduit; 62: threaded base; 63: screw rod; 64: motor; 65: elastic element; 66: memory alloy; 70: limiting platform; 80: air pipe connecting plate; 90: partition plate; 100: first connecting assembly; 101: second connecting assembly; 110: accommodating cavity; 111: first variable volume chamber; 112: second variable volume chamber; 120: first balance air flow hole; 121: second balance air flow hole; 130: communication conduit. DETAILED DESCRIPTION

[0039] In order to enable more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in combination with the drawings, the drawings are used for reference only, and are not used to limit the embodiments of the present application. In the following technical description, in order to facilitate explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.

[0040] The terms "first", "second", and the like in the specification and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so as to implement the embodiments of the embodiments of the present application described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0041] In addition, the terms "set", "connected", "fixed" should be understood broadly. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] Unless otherwise specified, the term "a plurality of" means two or more.

[0043] It should be noted that the embodiments in the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0044] Embodiment one

[0045] In combination Figures 1 to 5As shown, in the embodiments of the present application, a gas-liquid separator is provided, which comprises a housing 10, a variable volume assembly 20, a refrigerant upper inlet pipe 30, a refrigerant lower inlet pipe 40, a refrigerant outlet pipe 50 and a driving assembly 60. The housing 10 is provided with a receiving cavity 110. The variable volume assembly 20 forms a first variable volume cavity 111 and a second variable volume cavity 112 in the receiving cavity 110. The variable volume assembly 20 is provided with a communication pipe 130, and the first balance air flow hole 120 is arranged on the communication pipe 130. The pipe outlet of the refrigerant upper inlet pipe 30 communicates with the first variable volume cavity 111. The pipe outlet of the refrigerant lower inlet pipe 40 communicates with the communication pipe 130 on the variable volume assembly 20, and the refrigerant lower inlet pipe 40 can be telescoped with the movement of the variable volume assembly 20, while the refrigerant flowing out of the refrigerant upper inlet pipe 30 cannot directly flow into the pipe inlet of the refrigerant lower inlet pipe 40. The pipe inlet of the refrigerant outlet pipe 50 communicates with the communication pipe 130 on the variable volume assembly 20, and the pipe outlet of the refrigerant outlet pipe 50 penetrates out of the housing 10 from the first variable volume cavity 111. The refrigerant outlet pipe 50 is telescoped with the movement of the variable volume assembly 20, and the second balance air flow hole 121 is arranged on the refrigerant outlet pipe 50. The variable volume assembly 20 is driven to move by the driving assembly 60, so as to change the volumes of the first variable volume cavity 111 and the second variable volume cavity 112.

[0046] The first variable volume cavity 111 is close to the top of the housing 10, and the second variable volume cavity 112 is close to the bottom of the housing 10.

[0047] In combination Figure 1 As shown, in some embodiments, the housing 10 comprises a shell 11, a top cover 12 and a base 13. The shell 11 is enclosed with a hollow part, and the shell 11 is sealed by the top cover 12 and the base 13. For example, the housing 10 is in the shape of a cylinder as a whole. The shell 11 forms the side surface of the cylinder, and the top cover 12 and the base 13 are both in the shape of a circle. The top cover 12 serves as the top surface of the cylinder, and the base 13 serves as the bottom surface of the cylinder. The housing 10 with the receiving cavity 110 is formed by the enclosure of the shell 11, the top cover 12 and the base 13.

[0048] In other embodiments, the housing 10 comprises a top cover and a bottom part. The bottom part is in the shape of a barrel which is integrally formed. The bottom part is sealed by the top cover to obtain the housing with the receiving cavity 110.

[0049] It can be understood that the housing 10 is usually provided in the shape of a cylinder, and it is not excluded that it can be provided in other cubic shapes, which can be set by engineers according to their own use requirements.

[0050] In combination Figure 1 And Figure 2In some embodiments, the variable volume assembly 20 is a piston assembly 21. The piston assembly 21 is disposed in the receiving cavity 110 along an axial direction of the receiving cavity 110, and the piston assembly 21 and the housing 10 enclose a first variable volume chamber 111 and a second variable volume chamber 112. The piston assembly 21 is internally provided with a communication channel 130.

[0051] For example, the housing 10 includes a top cover 12, a shell 11, and a base 13. The piston assembly 21 is connected to the shell 11, and the piston assembly 21, the shell 11, and the top cover 12 enclose the first variable volume chamber 111. The piston assembly 21, the shell 11, and the base 13 enclose the second variable volume chamber 112. The base 13 can be provided with one or more support platforms for supporting the piston assembly 21, so that there is a second variable volume chamber 112 between the piston assembly 21 and the base 13, and the volume of the second variable volume chamber 112 is greater than a set volume.

[0052] It can be understood that the minimum volume of the second variable volume chamber 112 varies due to the height and number of the support platforms.

[0053] In the above embodiments, the receiving cavity 110 is provided with a limiting platform 70 for limiting the movement range of the piston assembly 21.

[0054] It can be understood that the height of the limiting platform 70 can be set by engineers according to actual use requirements.

[0055] In combination Figure 3 In other embodiments, the variable volume assembly 20 includes a bellows 22, an upper connecting plate 23, and a lower connecting plate 24. The bellows 22 is a hollow pipe with a first open end and a second open end, and the bellows 22 is disposed in the receiving cavity 110. One side of the upper connecting plate 23 is connected to the housing 10, and the other side of the upper connecting plate 23 is used to seal the first open end. The lower connecting plate 24 is used to seal the second open end, and the lower connecting plate 24 is internally provided with the communication channel 130.

[0056] For example, the housing 10 includes a top cover 12, a shell 11, and a base 13. One side of the upper connecting plate 23 is connected to the top cover 12, and the other side of the upper connecting plate 23 is used to seal the first open end of the bellows 22. The second open end of the bellows 22 is sealed by the lower connecting plate 24. The bellows 22, the upper connecting plate 23, and the lower connecting plate 24 form the first variable volume chamber 111. The chamber part of the receiving cavity 110 other than the first variable volume chamber 111 is used as the second variable volume chamber 112.

[0057] In combination Figures 1 to 5As shown, in some embodiments, the refrigerant outlet pipe 50 can include a first outlet pipe 51 and a second outlet pipe 52. The first outlet pipe 51 is fixed on the variable volume assembly 20; the second outlet pipe 52 passes through the shell 10 from the first variable volume chamber 111; the inner diameter of the pipe mouth of the second outlet pipe 52 is larger than the outer diameter of the pipe mouth of the first outlet pipe 51, and the first outlet pipe 51 is arranged in the second outlet pipe 52.

[0058] The first outlet pipe 51 can be fixed on the variable volume assembly 20 through the first connecting assembly 100.

[0059] It can be understood that, in the case of forming the first variable volume chamber 111 by using the piston assembly 21, a through hole for the refrigerant outlet pipe 50 to pass through can be formed on the top cover 12, so that the refrigerant outlet pipe 50 passes through the shell 10 from the first variable volume chamber 111. In the case of forming the first variable volume chamber 111 by using the bellows 22, through holes can be formed on the top cover 12 and the upper connecting plate 23, so that the refrigerant outlet pipe 50 can pass through the shell 10 from the first variable volume chamber 111. At the same time, the limiting table 70 can be provided with a through hole for the second outlet pipe 52 to pass through, so that the second outlet pipe 52 passes through the corresponding through hole to be better fixed, and the limiting table 70 and the second outlet pipe 52 can be welded at the place where they contact each other.

[0060] Similarly, in the case of forming the first variable volume chamber 111 by using the piston assembly 21, a through hole for the refrigerant upper inlet pipe 30 to pass through can be formed on the top cover 12, so that the refrigerant upper inlet pipe 30 communicates with the first variable volume chamber 111 through the through hole. In the case of forming the first variable volume chamber 111 by using the bellows 22, through holes can be formed on the top cover 12 and the upper connecting plate 23, so that the refrigerant upper inlet pipe 30 communicates with the first variable volume chamber 111 through the through holes formed on the top cover 12 and the upper connecting plate 23.

[0061] In some embodiments, the refrigerant lower inlet pipe 40 can include a first lower inlet pipe 41 and a second lower inlet pipe 42. The first lower inlet pipe 41 is fixed on the variable volume assembly 20; the second lower inlet pipe 42 is fixed on the first variable volume chamber 111; the inner diameter of the pipe mouth of the second lower inlet pipe 42 is larger than the outer diameter of the pipe mouth of the first lower inlet pipe 41, and the first lower inlet pipe 41 is arranged in the second lower inlet pipe 42.

[0062] The first lower inlet pipe 41 can be fixed on the variable volume assembly 20 through the first connecting assembly 100.

[0063] It can be understood that the first connecting assembly 100 can be a device for fixing the first lower inlet pipe 41, such as a pressing plate, a screw, etc.

[0064] In some embodiments, the upper refrigerant inlet pipe 30, the lower refrigerant inlet pipe 40 and the refrigerant outlet pipe 50 can be made of rigid materials. The rigid materials can be metal materials, such as copper pipes, stainless steel pipes, aluminum-copper alloy pipes, etc. The rigid materials can also be engineering plastics, such as polycarbonate (PC), polyamide (PA), polyether ether ketone (PEEK), etc.

[0065] It can be understood that a through hole can be provided on the limiting table 70 for the second lower refrigerant inlet pipe 42 to pass through, so that the second lower refrigerant inlet pipe 42 passes through the corresponding through hole to be better fixed, and the place where the limiting table 70 and the second lower refrigerant inlet pipe 42 contact each other can be welded.

[0066] For example, the second lower refrigerant inlet pipe 42 is fixed in the first variable volume chamber 111, and can be connected to the second outlet pipe 52 and the second lower refrigerant inlet pipe 42 through the air pipe connecting plate 80.

[0067] In some embodiments, the upper refrigerant inlet pipe 30 and the lower refrigerant inlet pipe 40 are arranged staggered, and the pipe outlet of the upper refrigerant inlet pipe 30 is lower than the pipe inlet of the lower refrigerant inlet pipe 40. In this way, according to the properties of gas and liquid, the heavier refrigeration oil will sink to the bottom of the first variable volume chamber 111, and the lighter gaseous refrigerant will float to the top of the first variable volume chamber 111, so that only the lighter gaseous refrigerant can enter the pipe inlet of the lower refrigerant inlet pipe 40, thereby realizing gas-liquid separation.

[0068] In combination Figure 1 As shown in the drawings, in another embodiment, a partition plate 90 is arranged in the gas-liquid separator. The partition plate 90 is fixedly arranged in the first variable volume chamber 111. The partition plate 90 is arranged at a first preset distance below the pipe outlet of the upper refrigerant inlet pipe 30. Meanwhile, the pipe inlet of the lower refrigerant inlet pipe 40 is arranged at a second preset distance below the partition plate 90. In this way, by the blocking of the partition plate 90, the refrigeration oil cannot directly enter the pipe inlet of the lower refrigerant inlet pipe 40, while the gaseous refrigerant can enter the lower refrigerant inlet pipe 40 through the gap between the partition plate 90 and the pipe inlet of the lower refrigerant inlet pipe 40, thereby realizing gas-liquid separation.

[0069] In the above embodiment, the partition plate 90 is provided with a fan-shaped protrusion. In this way, the fan-shaped protrusion can be beneficial to the dispersion of the gas flow of the refrigerant and accelerate the flow of the refrigerant.

[0070] In an optional manner of the above embodiment, the gas-liquid separator can further include a second connecting assembly 101. The second connecting assembly 101 is fixedly arranged on the shell 10 near one side of the accommodating cavity 110, and is used for fixing the partition plate 90.

[0071] For example, the second connecting assembly 101 can be a device for fixing the partition plate, such as a pressing plate, a screw, etc.

[0072] It is appreciated that, in the case that the piston assembly 21 is used to form the first variable volume chamber 111, the second connecting assembly 101 is connected to the top cover 12, and the partition plate 90 is fixed by the second connecting assembly 101. In the case that the bellows 22 is used to form the first variable volume chamber 111, the second connecting assembly 101 is connected to the upper connecting plate 23, and the partition plate 90 is fixed by the second connecting assembly 101.

[0073] In another alternative of the above embodiment, the partition plate 90 can be welded to the inner wall of the first variable volume chamber 111. In this way, the partition plate 90 can be fixed without using the second connecting assembly 101, so as to save the cost of manufacturing the gas-liquid separator.

[0074] It is appreciated that, in the case that the piston assembly 21 is used to form the first variable volume chamber 111, the second connecting assembly 101 can be welded to the top cover 12. In the case that the bellows 22 is used to form the first variable volume chamber 111, the second connecting assembly 101 can be welded to the upper connecting plate 23.

[0075] In combination Figure 1 As shown in FIG. 1, in some embodiments, the driving assembly 60 can include a fluid conduit 61. The fluid conduit 61 is in communication with the second variable volume chamber 112, and is used to introduce or discharge fluid to the second variable volume chamber 112. Specifically, in the process that the fluid conduit 61 introduces fluid to the second variable volume chamber 112, the introduced fluid will generate a pushing force on the piston assembly 21 or the lower connecting plate 24, so as to push the piston assembly 21 or the lower connecting plate 24 to move to the top of the housing 10, so that the volume of the first variable volume chamber 111 becomes smaller. When the fluid in the second variable volume chamber 112 is discharged, the pushing force of the fluid on the piston assembly 21 or the lower connecting plate 24 decreases, and the piston assembly 21 or the lower connecting plate 24 moves to the bottom of the housing 10, so that the volume of the first variable volume chamber 111 becomes larger. In this way, the gas-liquid separator can dynamically adjust the volume of the first variable volume chamber 111 through which the refrigerant flows.

[0076] It is appreciated that the fluid conduit 61 is also connected to a device for providing fluid. The fluid can be liquid, gas or gas-liquid mixture. Correspondingly, in the case that the fluid is liquid, the device for providing fluid can be a tank for storing liquid. In the case that the fluid is gas, the device for providing fluid can be a tank for storing gas.

[0077] For example, when the fluid is liquid, it can be refrigeration oil, liquid refrigerant, etc. When the fluid is gas, it can be gaseous refrigerant.

[0078] In combination Figure 4In some embodiments, the driving assembly 60 can include a memory alloy 66. One end of the memory alloy 66 is connected to the bottom of the second variable volume chamber 112, and the other end of the memory alloy 66 is connected to the variable volume assembly 20. The memory alloy 66 is deformed under the control of the heating temperature and the pressure in the first variable volume chamber 111 to drive the variable volume assembly 20 to move.

[0079] In some embodiments, the driving assembly 60 can include a memory alloy 66. One end of the memory alloy 66 is connected to the bottom of the second variable volume chamber 112, and the other end of the memory alloy 66 is connected to the variable volume assembly 20. The memory alloy 66 is deformed under the control of the heating temperature and the pressure in the first variable volume chamber 111 to drive the variable volume assembly 20 to move. Figure 5 In some embodiments, the driving assembly 60 can include a memory alloy 66. One end of the memory alloy 66 is connected to the bottom of the second variable volume chamber 112, and the other end of the memory alloy 66 is connected to the variable volume assembly 20. The memory alloy 66 is deformed under the control of the heating temperature and the pressure in the first variable volume chamber 111 to drive the variable volume assembly 20 to move.

[0080] Figure 3 In some embodiments, the driving assembly 60 can include a memory alloy 66. One end of the memory alloy 66 is connected to the bottom of the second variable volume chamber 112, and the other end of the memory alloy 66 is connected to the variable volume assembly 20. The memory alloy 66 is deformed under the control of the heating temperature and the pressure in the first variable volume chamber 111 to drive the variable volume assembly 20 to move.

[0081] It can be understood that, since the control technology of the motor is relatively mature, the motor can be used to drive the variable volume assembly to move, which can make the movement of the variable volume assembly more accurate.

[0082] Exemplarily, the housing 10 includes a top cover 12, a shell 11, and a base 13. The motor 64 can be arranged outside the housing 10. One end of the screw rod 63 is connected to the motor 64, and the other end of the screw rod 63 penetrates through the base 13 and is connected to the threaded base 62 in the second variable volume chamber 112, which is connected to the variable volume assembly 20. The motor 64 drives the screw rod 63 to move the threaded base 62, and further drives the variable volume assembly 20 to move.

[0083] Exemplarily, the motor 64, the threaded base 62, and the screw rod 63 are all arranged in the second variable volume chamber 112. The motor 64 drives the screw rod to move the threaded base 62, and further drives the variable volume assembly 20 to move.

[0084] Exemplarily, in the case that the variable volume assembly 20 is a piston assembly 21, the threaded base 62 for connecting the screw rod 63 can be integrated on the piston assembly 21. Thus, the motor 64 can drive the screw rod 63 to move the threaded base 62, and further drives the piston assembly 21 to move.

[0085] ​Also exemplary, in the case where the variable volume assembly 20 is a bellows 22, an upper bellows connecting plate 23, and a lower bellows connecting plate 24, a separate threaded base 62 can be connected on the side of the lower bellows connecting plate 24 that is not connected to the bellows 22. This allows the motor 64 to drive the threaded rod 63 to move the threaded base 62, and in turn, the lower bellows connecting plate 24.

[0086] In some embodiments, the gas-liquid separator can be assembled by the following steps: 1. Weld the limiting platform 70 to the shell 11. 2. Weld the first lower inlet pipe 41 and the first outlet pipe 51 to the first connecting assembly 100, and then assemble and weld with the piston assembly 21. 3. Put the assembly of step 2 into the assembly of step 1, and weld the shell 11 and the base 13. 4. Weld the second lower inlet pipe 42, the second outlet pipe 52, and the gas pipe connecting plate 80, and then assemble with the top cover 12, the partition plate 90, and the second connecting assembly 101. 5. Weld the assembly of step 4 to the assembly of step 3, and then install the refrigerant upper inlet pipe 30 and the fluid pipe 61. In this way, the refrigerant enters the piston-type variable volume gas-liquid separator from the refrigerant upper inlet pipe 30, and the liquid part of the refrigerant directly drips to the bottom by gravity, while the gaseous refrigerant is discharged from the gas-liquid separator along the flow direction of the refrigerant lower inlet pipe 40, the communication pipe 130, and the refrigerant outlet pipe 50, achieving gas-liquid separation.

[0087] The above description and drawings suffice to fully illustrate the embodiments of the present disclosure to enable a person skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments can be included or replaced by parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A gas-liquid separator characterized by, The application relates to a refrigerant compressor, which comprises the following components: an outer shell provided with a containing cavity; a variable-volume assembly used for forming a first variable-volume chamber and a second variable-volume chamber in the containing cavity; the first variable-volume chamber is close to the top of the outer shell; the variable-volume assembly is provided with a communication pipeline, and the communication pipeline is provided with a first balance air flow hole; a refrigerant upper inlet pipe, the pipeline outlet of the refrigerant upper inlet pipe is communicated with the first variable-volume chamber; a refrigerant lower inlet pipe, the pipeline outlet of the refrigerant lower inlet pipe is communicated with the communication pipeline on the variable-volume assembly; the refrigerant lower inlet pipe is telescopic with the movement of the variable-volume assembly; the refrigerant flowing out of the refrigerant upper inlet pipe cannot directly flow into the pipeline inlet of the refrigerant lower inlet pipe; a refrigerant outlet pipe, the pipeline inlet of the refrigerant outlet pipe is communicated with the communication pipeline on the variable-volume assembly; the pipeline outlet of the refrigerant outlet pipe is out of the outer shell from the first variable-volume chamber; the refrigerant outlet pipe is telescopic with the movement of the variable-volume assembly; the refrigerant outlet pipe is provided with a second balance air flow hole; a driving assembly used for driving the variable-volume assembly to move so as to change the volume of the first variable-volume chamber and the second variable-volume chamber. The variable-volume assembly is a piston assembly arranged in the containing cavity along the axial direction of the containing cavity, the piston assembly and the outer shell form the first variable-volume chamber and the second variable-volume chamber, and the piston assembly is internally provided with the communication pipeline. The containing cavity is internally provided with a limiting table used for limiting the movement range of the piston assembly. The variable-volume assembly comprises: a bellows, which is a hollow pipeline with a first open end and a second open end; the bellows is arranged in the containing cavity; an upper connecting plate, one side of the upper connecting plate is connected with the outer shell, and the other side of the upper connecting plate is used for sealing the first open end; a lower connecting plate, which is used for sealing the second open end; and the lower connecting plate is internally provided with the communication pipeline. The refrigerant lower inlet pipe comprises: a first lower inlet pipe, which is fixed on the variable-volume assembly; and a second lower inlet pipe, which is fixed on the first variable-volume chamber; the inner diameter of the pipe opening of the second lower inlet pipe is larger than the outer diameter of the pipe opening of the first lower inlet pipe, and the first lower inlet pipe is arranged in the second lower inlet pipe. The refrigerant outlet pipe comprises: a first outlet pipe, which is fixed on the variable-volume assembly; and a second outlet pipe, which is out of the outer shell from the first variable-volume chamber; the inner diameter of the pipe opening of the second outlet pipe is larger than the outer diameter of the pipe opening of the first outlet pipe, and the first outlet pipe is arranged in the second outlet pipe. The driving assembly comprises: a threaded base connected with the variable-volume assembly; a screw rod matched connected with the threaded base; and a motor connected with the screw rod, which drives the screw rod to rotate so as to drive the variable-volume assembly to move.

2. The gas-liquid separator of claim 1, wherein, The driving assembly comprises:

3. The gas-liquid separator of claim 2, wherein, ​ 4. The gas-liquid separator of claim 1, wherein, ​ ​ ​ ​ 5. The gas-liquid separator of claim 1, wherein, ​ ​ ​ 6. The gas-liquid separator of claim 1, wherein, ​ ​ ​ 7. The gas-liquid separator of claim 1, wherein, ​ ​ ​ ​ 8. The gas-liquid separator of claim 1, wherein, ​ A fluid conduit is in communication with the second variable volume chamber; the fluid conduit is used to introduce or discharge fluid to the second variable volume chamber, and the fluid drives the variable volume assembly to move.

9. The gas-liquid separator of claim 1, wherein, The driving assembly comprises: An elastic element, one end of the elastic element is connected with the bottom of the second variable volume chamber, and the other end of the elastic element is connected with the variable volume assembly; the elastic element deforms following the pressure in the first variable volume chamber to drive the variable volume assembly to move.

10. The gas-liquid separator of claim 1, wherein, The driving assembly comprises: A memory alloy, one end of the memory alloy is connected with the bottom of the second variable volume chamber, and the other end of the memory alloy is connected with the variable volume assembly; the memory alloy deforms following the heating temperature and the pressure in the first variable volume chamber to drive the variable volume assembly to move.

11. The gas-liquid separator according to any one of claims 1 to 10, characterized in that The gas-liquid separator further comprises: A partition plate is fixed in the first variable volume chamber, located at a first preset distance below the pipeline outlet of the upper inlet pipe of the refrigerant, used to block the refrigerant flowing out of the pipeline outlet of the upper inlet pipe of the refrigerant; and a pipeline inlet of the lower inlet pipe of the refrigerant is arranged at a second preset distance below the partition plate.

12. The gas-liquid separator according to any one of claims 1 to 10, characterized in that The upper inlet pipe of the refrigerant and the lower inlet pipe of the refrigerant are staggered, and the pipeline outlet of the upper inlet pipe of the refrigerant is lower than the pipeline inlet of the lower inlet pipe of the refrigerant.

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