Gas-liquid separator

Abstract

The application discloses a gas-liquid separator, which comprises a separation barrel, the separation barrel defines a separation chamber with an open end, the inner surface of the side wall of the separation chamber has an included angle with the depth direction of the separation chamber; a cover is installed at the open end of the separation chamber, the cover is provided with a first inlet and a first outlet, and the first inlet and the first outlet are both communicated with the separation chamber; an inlet pipe is arranged in the separation chamber and communicated with the first inlet, and the outlet end of the inlet pipe is adapted to guide the gas-liquid mixture to the circumferential direction of the separation chamber. Thus, by arranging the separation barrel and the inlet pipe, after the gas-liquid mixture flows out from the outlet end of the inlet pipe, the gas-liquid mixture does centrifugal motion in the tangential direction of the separation chamber, under the action of the centrifugal force and the gravity field, the liquid in the gas-liquid mixture flows on the inner surface of the side wall of the separation chamber, the gas flows out from the first outlet, and the separated liquid is not easily taken away by the gas, compared with the prior art, the separation efficiency of the gas-liquid separator is improved.

Description

TECHNICAL FIELD

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

[0002] The gas-liquid separator is arranged on a compressor suction pipe, and is used to separate liquid refrigerant that has not been evaporated from gas flowing out from an evaporator, so as to prevent liquid droplets from entering the compressor and causing "liquid hammer" damage to the compressor, and to ensure smooth operation of the compressor. Therefore, the separation efficiency of the gas-liquid separator is crucial.

[0003] In the related art, the existing gas-liquid separator separates gas and liquid by means of deflection and gravity sedimentation. The gas is deflected, and at the same time, the liquid that has been attached to the wall is also pushed to flow in the direction of the gas flow. When the gas flow rate exceeds a certain range, the collision force of the liquid droplets when colliding with the deflection plate will become larger, and the liquid droplets are more likely to be broken into finer droplets and return to the gas flow, which results in poor separation efficiency of the gas-liquid separator and affects the separation efficiency of the gas-liquid separator. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a gas-liquid separator capable of separating liquid and gas in a gas-liquid mixture, and the separated liquid is not easily carried away by the gas, thereby improving the separation efficiency of the gas-liquid separator.

[0005] The gas-liquid separator according to the present application comprises: a separation barrel defining a separation chamber open at one end, an inner surface of a side wall of the separation chamber having an included angle with a depth direction of the separation chamber; a cover installed at the open end of the separation chamber, the cover being provided with a first inlet and a first outlet, both the first inlet and the first outlet being in communication with the separation chamber; and an inlet pipe provided in the separation chamber and in communication with the first inlet, an outlet end of the inlet pipe being adapted to guide the gas-liquid mixture towards the circumferential direction of the separation chamber.

[0006] The gas-liquid separator according to the present application, by providing the separation barrel and the inlet pipe, after the gas-liquid mixture flows out from the outlet end of the inlet pipe, the gas-liquid mixture does centrifugal motion in the tangential direction of the separation chamber, under the action of the centrifugal force and the gravity field, the liquid in the gas-liquid mixture will flow on the inner surface of the side wall of the separation chamber, the gas flows out from the first outlet, the separated liquid is not easily carried away by the gas, thereby separating the liquid and the gas, compared with the prior art, the separation efficiency of the gas-liquid separator is improved.

[0007] In some examples of the present application, the inner surface of the side wall of the separation chamber extends obliquely towards the inside of the separation chamber from the open end of the separation chamber to the bottom wall of the separation chamber.

[0008] In some examples of the present application, the gas-liquid separator further comprises a separation tube arranged in the separation chamber, the gas flow in the separation chamber flows through the separation tube to the first outlet, wherein the separation tube has a gas-liquid separation effect on the gas flow.

[0009] In some examples of the present application, the separation tube comprises a first tube body and a second tube body, the first tube body and the second tube body are in communication, the end of the first tube body away from the second tube body is in communication with the first outlet, and the end of the second tube body away from the first tube body is arranged close to the cover.

[0010] In some examples of the present application, the first tube body and the second tube body both extend in the depth direction of the separation chamber, the end of the first tube body close to the bottom wall of the separation chamber is in communication with the end of the second tube body close to the bottom wall of the separation chamber, and the end of the first tube body close to the cover is in communication with the first outlet.

[0011] In some examples of the present application, the inner surface of the first tube body extends obliquely towards the outside of the first tube body from the open end of the separation chamber to the bottom wall of the separation chamber.

[0012] In some examples of the present application, the separation tube further comprises a connecting portion, the connecting portion defines a connecting chamber, and the end of the first tube body close to the bottom wall of the separation chamber and the end of the second tube body close to the bottom wall of the separation chamber are both in communication with the connecting chamber.

[0013] In some examples of the present application, the bottom wall of the connecting chamber is provided with an oil return hole.

[0014] In some examples of the present application, the gas-liquid separator further comprises a housing, the housing defines a mounting cavity with one end open, the cover seals the open end of the mounting cavity, the first outlet is in communication with the mounting cavity, the separation barrel is arranged in the mounting cavity and spaced apart from the housing, and the housing is provided with a second outlet in communication with the mounting cavity.

[0015] In some examples of the present application, the gas-liquid separator further comprises a heat exchange pipeline, the housing is provided with a second inlet, the cover or the housing is provided with a third outlet, the heat exchange pipeline is arranged between the housing and the separation barrel, and the heat exchange pipeline is in communication with the second inlet and the third outlet.

[0016] In some examples of the present application, the heat exchange pipeline extends in the length direction of the separation barrel and is arranged around the outside of the separation barrel.

[0017] In some examples of the present application, the housing comprises a shell and a cover, the shell and the cover jointly define the mounting cavity, the cover is configured as a bottom wall of the mounting cavity, the second inlet and the second outlet are both provided on the cover, and the third outlet is provided on the cover.

[0018] In some examples of the present application, a heat insulation member is provided between the heat exchange pipeline and the separation barrel, and the heat exchange pipeline, the housing, the heat insulation member and the separation barrel jointly define a gas flow channel, which is communicated with the first outlet and the second outlet.

[0019] In some examples of the present application, the gas-liquid separator further comprises a filter member, which is provided in the housing and covers the second outlet.

[0020] Additional aspects and advantages of the present application will be in part apparent and in part pointed out below. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0022] Figure 1 is an exploded view of a separation barrel, a cover, a separation pipeline and an inlet pipeline according to an embodiment of the present application;

[0023] Figure 2 is a schematic view of a cover according to an embodiment of the present application;

[0024] Figure 3 is a sectional view of a gas-liquid separator according to an embodiment of the present application;

[0025] Figure 4 is a schematic view of gas flow direction in a separation barrel of a gas-liquid separator according to an embodiment of the present application;

[0026] Figure 5 is a sectional view of a separation barrel and a separation pipeline of a gas-liquid separator according to an embodiment of the present application;

[0027] Figure 6 is Figure 5 is an enlarged view of A in FIG. 6.

[0028] REFERENCE NUMERALS:

[0029] a gas-liquid separator 100;

[0030] a separation barrel 10; a separation chamber 11;

[0031] Cover 20; first inlet 21; first outlet 22; third outlet 23; cover body 24; boss 25; first sub-outlet 26; second sub-outlet 27;

[0032] Inlet pipe 30;

[0033] Separation pipe 40; first pipe body 41; second pipe body 42; connecting portion 43; connecting chamber 44; oil return hole 45;

[0034] Housing 50; mounting cavity 51; second outlet 52; second inlet 53; shell 54; cover 55;

[0035] Heat exchange pipe 60; gas flow channel 61;

[0036] Thermal insulation 70; filter 80. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0038] Reference is made below to Figures 1-6 A gas-liquid separator 100 according to an embodiment of the present application is described.

[0039] As Figures 1-6 shown, the gas-liquid separator 100 according to an embodiment of the present application includes a separation bucket 10, a cover 20 and an inlet pipe 30. The separation bucket 10 defines a separation chamber 11, which is open at one end, and the inner surface of the side wall of the separation chamber 11 has an included angle with the depth direction of the separation chamber 11, wherein the depth direction of the separation chamber 11 refers to the up-down direction in Figure 3 , and further, as Figure 3 shown, from the upper end to the lower end of the separation chamber 11, the inner surface of the side wall of the separation chamber 11 extends obliquely towards the inside of the separation chamber 11, or the inner surface of the side wall of the separation chamber 11 extends obliquely towards the outside of the separation chamber 11.

[0040] Further, the cover 20 is installed at the open end of the separation chamber 11, and the cover 20 can seal the open end of the separation chamber 11, for example, the cover 20 and the separation barrel 10 are welded or threaded, and after the cover 20 is assembled with the separation barrel 10, the gap between the cover 20 and the separation barrel 10 can be sealed by welding or threaded connection of the cover 20 and the separation barrel 10. The cover 20 is provided with a first outlet 22, and the cover 20 is also provided with a first inlet 21, the first inlet 21 is communicated with the separation chamber 11, and the first outlet 22 is communicated with the separation chamber 11. The inlet pipe 30 is arranged in the separation chamber 11, and one end of the inlet pipe 30 is communicated with the first inlet 21, and the outlet end of the inlet pipe 30 (i.e. the other end of the inlet pipe 30) is adapted to flow the gas-liquid mixture (such as gas-liquid mixed refrigerant) towards the circumference of the separation chamber 11.

[0041] Specifically, taking the example that the gas-liquid separator 100 is communicated with the evaporator, the inlet pipe 30 can be provided in a spiral structure, the first inlet 21 can be communicated with the evaporator outlet of the evaporator, and the low-temperature and low-pressure gas-liquid mixed refrigerant (gas-liquid mixture) after heat exchange of the evaporator flows into the inlet pipe 30 from the first inlet 21. After the gas-liquid mixed refrigerant passes through the spiral inlet pipe 30, the gas-liquid mixed refrigerant generates centrifugal spiral motion, which can make the gas-liquid mixed refrigerant flow out from the outlet end of the inlet pipe 30 into the separation chamber 11 towards the circumference of the separation chamber 11. After the gas-liquid mixture flows into the separation chamber 11, it will do centrifugal motion in the circumference of the separation chamber 11, and under the action of centrifugal force and gravity field, the gas-liquid mixture will move towards the lower part of the separation barrel 10 in a spiral shape. The liquid droplets in the gas-liquid mixture are heavier and receive larger centrifugal force, so they are thrown on the inner surface of the side wall of the separation chamber 11. The liquid droplets adhere to the inner surface of the side wall of the separation chamber 11, and since the inner surface of the side wall of the separation chamber 11 has an included angle with the depth direction of the separation chamber 11, for example, as shown in Figure 3 the inner surface of the side wall of the separation chamber 11 extends obliquely towards the inside of the separation chamber 11 from the upper end to the lower end of the separation chamber 11. When the liquid droplets flow downward along the inner surface of the side wall of the separation chamber 11, the liquid droplets can continuously contact the inner surface of the side wall of the separation chamber 11, and the liquid droplets will not be taken away by the gas flow, so that the liquid droplets are separated from the gas-liquid mixture. The liquid droplets can be collected at the bottom of the separation barrel 10, and when the gas moves towards the bottom wall of the separation chamber 11, the speed gradually decreases, and finally the gas moves upwards Figure 3 from the first outlet 22.

[0042] It should be noted that when the inner surface of the side wall of the separation chamber 11 is arranged to extend obliquely towards the outside of the separation chamber 11, the gas-liquid mixed refrigerant after passing through the spiral inlet pipe 30 generates a centrifugal spiral motion, which can make the gas-liquid mixed refrigerant flow out of the outlet end of the inlet pipe 30 into the separation chamber 11, and the gas-liquid mixture flows into the separation chamber 11 and performs a centrifugal motion in the circumferential direction of the separation chamber 11. Under the action of centrifugal force and gravity field, the gas-liquid mixture moves towards the lower part of the separation drum 10 in a spiral shape. The liquid droplets in the gas-liquid mixture are thrown onto the inner surface of the side wall of the separation chamber 11 due to the larger centrifugal force, and the liquid droplets adhere to the inner surface of the side wall of the separation chamber 11. When the liquid droplets flow downward along the inner surface of the side wall of the separation chamber 11, the liquid droplets can continuously contact the inner surface of the side wall of the separation chamber 11, and the liquid droplets cannot be taken away by the gas flow, so that the liquid droplets are separated from the gas-liquid mixture. The liquid droplets can be collected at the bottom of the separation drum 10, and the gas gradually reduces the speed when moving towards the bottom wall of the separation chamber 11, and finally the gas moves upwards towards the Figure 3 The liquid droplets collide with the inner surface of the side wall of the separation chamber 11 and are broken into finer droplets, which move upwards with the gas. The liquid droplets contact and adhere to the inner surface of the side wall of the separation chamber 11 again, and the gas flows out of the first outlet 22.

[0043] Therefore, by arranging the separation drum 10 and the inlet pipe 30, the gas-liquid mixture flows out of the outlet end of the inlet pipe 30, and the gas-liquid mixture performs a centrifugal motion in the tangential direction of the separation chamber 11. Under the action of centrifugal force and gravity field, the liquid in the gas-liquid mixture adheres to the inner surface of the side wall of the separation chamber 11 and flows, and the gas flows out of the first outlet 22. The separated liquid is not easily taken away by the gas, and compared with the prior art, the separation efficiency of the gas-liquid separator 100 is improved.

[0044] In some embodiments of the present application, the inlet pipe 30 is arranged corresponding to the first inlet 21, and the low-temperature and low-pressure gas-liquid mixed refrigerant (gas-liquid mixture) after heat exchange of the evaporator can flow directly into the inlet pipe 30 from the first inlet 21.

[0045] Further, the inlet pipe 30 is detachably connected with the cover 20, for example, the inlet pipe 30 is connected with the cover 20 by bolts and / or screws. This arrangement can reliably install the inlet pipe 30 on the cover 20, and can avoid separation of the cover 20 and the inlet pipe 30.

[0046] Further, the inlet pipe 30 is adhesively connected with the cover 20. This arrangement can reliably install the inlet pipe 30 on the cover 20, can avoid separation of the cover 20 and the inlet pipe 30, and can also facilitate assembly and disassembly of the cover 20 and the inlet pipe 30, thereby improving the disassembly efficiency of the cover 20 and the inlet pipe 30.

[0047] Further, the inlet pipe 30 is welded to the cover 20, so that the inlet pipe 30 can be reliably mounted to the cover 20, and the cover 20 and the inlet pipe 30 can be prevented from being separated.

[0048] Further, a sealing member can be arranged between the inlet pipe 30 and the cover 20, and the sealing member is suitable for sealing the gap between the inlet pipe 30 and the cover 20. After the low-temperature and low-pressure gas-liquid mixed refrigerant (gas-liquid mixture) after heat exchange of the evaporator flows into the first inlet 21, the low-temperature and low-pressure gas-liquid mixed refrigerant can be prevented from flowing into the separation chamber 11 from the gap between the inlet pipe 30 and the cover 20, so that the low-temperature and low-pressure gas-liquid mixed refrigerant can be ensured to flow into the inlet pipe 30 from the first inlet 21, and thus the low-temperature and low-pressure gas-liquid mixed refrigerant can be ensured to flow into the separation chamber 11 from the inlet pipe 30.

[0049] In some embodiments of the present application, the inner surface of the side wall of the separation chamber 11 is arranged to extend obliquely towards the inside of the separation chamber 11 from the open end of the separation chamber 11 to the bottom wall of the separation chamber 11. It can also be understood that the inner surface of the side wall of the separation chamber 11 is arranged to extend obliquely towards the inside of the separation chamber 11 from the upper end of the separation chamber 11 to the lower end of the separation chamber 11, that is, as shown in the direction from the upper end to the lower end of the separation chamber 11, so that the inner surface of the side wall of the separation chamber 11 is arranged in an inverted conical structure. Figure 3 The gas-liquid mixed refrigerant can generate centrifugal spiral motion after passing through the spiral inlet pipe 30, so that the gas-liquid mixed refrigerant can flow out of the outlet end of the inlet pipe 30 into the separation chamber 11 in the circumferential direction of the separation chamber 11, and the gas-liquid mixture can generate centrifugal motion in the circumferential direction of the separation chamber 11 after flowing into the separation chamber 11. Under the action of the centrifugal force and the gravitational field, the gas-liquid mixture can move in a spiral shape towards the lower part of the separation drum 10. Based on the centripetal force formula: F = m * v 2 / r, m is the mass of the gas flow, v is the velocity of the gas flow, and r is the radius of the separation chamber 11. When the centripetal force gradually decreases, if the motion speed is to be kept unchanged, the rotating radius of the gas flow needs to be reduced. Therefore, by arranging the inner surface of the side wall of the separation chamber 11 in an inverted conical structure, the speed of the spiral motion of the gas flow can be kept stable. The droplets have a larger mass than the gas, and can be thrown on the inner surface of the side wall of the separation chamber 11 and attached due to a larger centrifugal force. During the downward collection of the droplets, the droplets will continue to contact the inner surface of the side wall of the separation chamber 11 due to the pushing action of the downward rotating gas flow, and the droplets are not easy to be taken out by the rotating gas flow. Finally, the droplets are separated from the gas, and are collected at the bottom of the gas separation chamber, and the downward spiral gas flow gradually decreases in kinetic energy, and the rotating speed gradually decreases and finally moves upward. The gas can flow out of the first outlet 22. Such an arrangement can further improve the separation efficiency of the gas-liquid separator 100.

[0050] In some embodiments of the present application, as shown in Figure 3As shown, the gas-liquid separator 100 can further include a separation pipe 40 arranged inside the separation chamber 11, the gas flow in the separation chamber 11 flows to the first outlet 22 through the separation pipe 40, wherein the separation pipe 40 has a gas-liquid separation effect on the gas flow. During the process of the gas flow flowing through the separation pipe 40, the separation pipe 40 can separate the liquid droplets in the gas flow from the gas flow, by arranging the separation pipe 40, the gas and the liquid droplets in the gas flow can be separated again, and the separation efficiency of the gas-liquid separator 100 can be further improved.

[0051] In some embodiments of the present application, as Figure 3 shown, the separation pipe 40 can include a first pipe body 41, and the separation pipe 40 can further include a second pipe body 42, the second pipe body 42 and the first pipe body 41 are in communication, the end of the first pipe body 41 away from the second pipe body 42 is in communication with the first outlet 22, and the end of the second pipe body 42 away from the first pipe body 41 is arranged close to the cover 20, and the end of the second pipe body 42 away from the first pipe body 41 is arranged spaced apart from the cover 20. As Figure 3 shown, the end of the second pipe body 42 away from the first pipe body 41 is arranged close to the upper side of the separation barrel 10, which facilitates the gas flow from the end of the second pipe body 42 away from the first pipe body 41 into the separation pipe 40, so that the gas can flow out of the first outlet 22.

[0052] In some embodiments of the present application, as Figure 3 shown, the second pipe body 42 and the first pipe body 41 can be arranged in extension in the depth direction of the separation chamber 11, the depth direction of the separation chamber 11 refers to Figure 3 the up-down direction in the separation chamber 11, the end of the first pipe body 41 close to the bottom wall of the separation chamber 11 is in communication with the end of the second pipe body 42 close to the bottom wall of the separation chamber 11, and the end of the first pipe body 41 close to the cover 20 is in communication with the first outlet 22. Wherein, the end of the first pipe body 41 close to the bottom wall of the separation chamber 11 refers to Figure 3 the lower end of the first pipe body 41, the end of the second pipe body 42 close to the bottom wall of the separation chamber 11 refers to Figure 3 the lower end of the second pipe body 42, and the end of the first pipe body 41 close to the cover 20 refers to Figure 3 the upper end of the first pipe body 41, after the gas flow flows into the second pipe body 42 from the upper end of the second pipe body 42, the gas flow in the second pipe body 42 moves downward along the second pipe body 42, and then the gas flow flows into the first pipe body 41 after moving to the lower end of the second pipe body 42, and then the gas flow moves upward in the first pipe body 41, and the gas flow in the first pipe body 41 flows out of the first outlet 22.

[0053] Further, the inner surface of the first pipe body 41 is inclinedly arranged towards the outside of the first pipe body 41 from the open end of the separation chamber 11 to the bottom wall of the separation chamber 11, i.e. from the upper end of the separation chamber 11 to the lower end of the separation chamber 11. By arranging the inner surface of the first pipe body 41 to be inclinedly arranged towards the outside of the first pipe body 41, the inner surface of the first pipe body 41 can be arranged to be a conical structure. When the gas flow moves upwards in the first pipe body 41, the fine liquid droplets in the gas flow can again contact the inner surface of the first pipe body 41 and adhere to the inner surface of the first pipe body 41, which can effectively realize the separation of gas and liquid again, and can further improve the separation efficiency of the gas-liquid separator 100, thereby improving the gas flow dryness.

[0054] In some embodiments of the present application, as shown in Figure 3 The separation pipe 40 can further include a connecting portion 43, which can define a connecting chamber 44. The end of the first pipe body 41 close to the bottom wall of the separation chamber 11 is in communication with the connecting chamber 44, and the end of the second pipe body 42 close to the bottom wall of the separation chamber 11 is also in communication with the connecting chamber 44. After the gas flow flows into the second pipe body 42 from the upper end of the second pipe body 42, the gas flow in the second pipe body 42 moves downwards along the second pipe body 42, and then flows into the connecting chamber 44 after moving to the lower end of the second pipe body 42. Then, the gas flow in the connecting chamber 44 flows into the first pipe body 41, and then moves upwards in the first pipe body 41. The gas flow in the first pipe body 41 flows out from the first outlet 22. Such an arrangement can facilitate the communication between the first pipe body 41 and the second pipe body 42, and can simplify the structure of the separation pipe 40, thereby improving the production efficiency of the separation pipe 40.

[0055] Further, the first pipe body 41, the second pipe body 42 and the connecting portion 43 can be configured as an integrally formed member. Alternatively, the separation pipe 40 can be an integrally formed member. Such an arrangement can reduce the number of molds for developing and producing the separation pipe 40, and can reduce the development cost of the separation pipe 40, thereby reducing the production cost of the gas-liquid separator 100.

[0056] In some embodiments of the present application, as shown in Figure 3 The gas-liquid separator 100 can further include an outer shell 50, which defines a mounting cavity 51. One end of the mounting cavity 51 is open, as shown in Figure 3As shown, the upper end of the mounting cavity 51 can be open, and the cover 20 is used to seal the open end of the mounting cavity 51. Further, a sealing member is arranged between the cover 20 and the shell 50. The sealing member can be a sealing gasket. The sealing gasket is arranged between the cover 20 and the shell 50, and can seal the gap between the cover 20 and the shell 50. The mounting cavity 51 is in communication with the first outlet 22. The separation barrel 10 is arranged in the mounting cavity 51, and is spaced apart from the shell 50. The separation barrel 10 and the shell 50 form a gap therebetween. The shell 50 is provided with a second outlet 52 in communication with the mounting cavity 51. After the airflow flows out of the first outlet 22, the airflow flows into the gap between the separation barrel 10 and the shell 50, i.e. the airflow flows into the mounting cavity 51. The airflow in the mounting cavity 51 flows out of the mounting cavity 51 through the second outlet 52.

[0057] Further, the compressor inlet of the compressor can be in communication with the second outlet 52 of the gas-liquid separator 100. The first inlet 21 can be in communication with the evaporator outlet of the evaporator. After the low-temperature and low-pressure gas-liquid mixed refrigerant (gas-liquid mixture) after heat exchange in the evaporator flows into the inlet pipe 30 from the first inlet 21, the gas-liquid mixed refrigerant enters the separation chamber 11 through the inlet pipe 30. Under the action of suction of the compressor, a pressure difference is formed between the compressor and the separation chamber 11, i.e. the pressure at the first outlet 22 is less than the pressure in the separation chamber 11. Under the action of the pressure difference, the low-temperature gaseous airflow in the separation chamber 11 flows to the first outlet 22 through the second pipe body 42 and the first pipe body 41, so that the airflow flowing out of the first outlet 22 is sucked into the mounting cavity 51. The airflow in the mounting cavity 51 flows into the compressor through the second outlet 52.

[0058] It should be noted that under the condition that the suction pressure of the compressor is stable, the mass flow rate of the refrigerant (gas-liquid mixture) is constant. Since the pressure is constant, the volume flow rate of the gaseous refrigerant is also constant. According to the formula volume flow rate Q = average flow rate V * cross-sectional area A, when the airflow flows upward in the first pipe body 41, the cross-sectional area of the tapered inner surface of the first pipe body 41 gradually decreases. Therefore, the average flow rate of the airflow gradually increases. The inner surface of the first pipe body 41 extends outwardly and obliquely, which can inhibit the growth of the boundary layer of the inner surface of the first pipe body 41. The liquid droplets in the airflow adhere to the inner surface of the first pipe body 41, so that the airflow leaves the first pipe body 41 under a stronger positive pressure gradient, thereby improving the separation efficiency of the gas-liquid separator 100.

[0059] In some embodiments of the present application, as Figure 3As shown, the gas-liquid separator 100 can further comprise a heat exchange pipeline 60, the shell 50 is provided with a second inlet 53, the cover 20 or the shell 50 is provided with a third outlet 23, and it can also be understood that the third outlet 23 is arranged on the shell 50, and the heat exchange pipeline 60 can be arranged between the separation barrel 10 and the shell 50, and the heat exchange pipeline 60 can be communicated with the third outlet 23 and the second inlet 53. The second inlet 53 can be communicated with the gas cooler outlet or the condenser outlet, and the third outlet 23 can be communicated with the inlet of the expansion valve. The high-temperature and high-pressure liquid refrigerant flowing out of the gas cooler outlet flows into the heat exchange pipeline 60 through the second inlet 53, and the high-temperature and high-pressure liquid refrigerant in the heat exchange pipeline 60 flows into the expansion valve through the third outlet 23. It should be noted that the low-temperature and low-pressure gas-liquid mixed refrigerant after heat exchange of the evaporator flows into the separation chamber 11, and after the gas and liquid are separated, the gas flows into the space between the shell 50 and the separation barrel 10 through the first outlet 22, and the gas flowing into the space between the shell 50 and the separation barrel 10 exchanges heat with the heat exchange pipeline 60. It can also be understood that the low-temperature and low-pressure gaseous refrigerant flowing into the space between the shell 50 and the separation barrel 10 exchanges heat with the high-temperature and high-pressure liquid refrigerant flowing in the heat exchange pipeline 60, so that the temperature of the low-temperature and low-pressure gaseous refrigerant flowing into the space between the shell 50 and the separation barrel 10 is increased, and the temperature of the refrigerant flowing into the expansion valve is reduced, thereby improving the COP of the air conditioning system.

[0060] In some embodiments of the present application, the heat exchange pipeline 60 can be arranged as a metal pipeline, for example, the heat exchange pipeline 60 can be arranged as an aluminum pipe or a steel pipe or a copper pipe. The metal pipeline has a heat conduction effect, and after the gas flows into the space between the shell 50 and the separation barrel 10 through the first outlet 22, the heat exchange pipeline 60 can transfer heat between the high-temperature and high-pressure liquid refrigerant and the low-temperature and low-pressure gaseous refrigerant, so that the low-temperature and low-pressure gaseous refrigerant flowing into the space between the shell 50 and the separation barrel 10 exchanges heat with the high-temperature and high-pressure liquid refrigerant flowing in the heat exchange pipeline 60, thereby increasing the temperature of the low-temperature and low-pressure gaseous refrigerant flowing into the space between the shell 50 and the separation barrel 10, and reducing the temperature of the refrigerant flowing into the expansion valve, thereby ensuring the improvement of the COP of the air conditioning system. However, the present application is not limited to this, and the heat exchange pipeline 60 can also be arranged as a pipeline having the same effect as the metal pipeline.

[0061] In some embodiments of the present application, as shown in Figure 3 The heat exchange pipeline 60 can be arranged in the length direction of the separation barrel 10, and the heat exchange pipeline 60 can be arranged around the outside of the separation barrel 10. The length direction of the separation barrel 10 refers to the direction along the length of the separation barrel 10. Figure 3The heat exchange pipeline 60 is configured in a spiral structure in the up-down direction, and the heat exchange pipeline 60 is sleeved outside the separation barrel 10. This arrangement can increase the length of the heat exchange pipeline 60, and can increase the heat exchange area of the heat exchange pipeline 60, thereby improving the heat exchange efficiency between the low-temperature and low-pressure gaseous refrigerant flowing between the shell 50 and the separation barrel 10 and the high-temperature and high-pressure liquid refrigerant flowing in the heat exchange pipeline 60, and further improving the temperature rise rate of the low-temperature and low-pressure gaseous refrigerant flowing between the shell 50 and the separation barrel 10.

[0062] In some embodiments of the present application, as shown in Figure 2 The shell 50 can include a shell body 54, and the shell 50 can further include a cover body 55. The cover body 55 and the shell body 54 jointly define a mounting cavity 51, and the cover body 55 is configured as a bottom wall of the mounting cavity 51. The shell body 54 is configured in a cylindrical structure, as shown in Figure 2 The upper end and the lower end of the shell body 54 are both open, the cover 20 is mounted at the upper end of the shell body 54 (the open end of the mounting cavity 51), and the cover body 55 is mounted at the lower end of the shell body 54. The cover body 55 is used to seal the lower end of the shell body 54, and the cover body 55 is detachably connected with the shell body 54. The second outlet 52 and the second inlet 53 are both arranged on the cover body 55, and the third outlet 23 is arranged on the cover 20. In addition, after the gas flow flows out of the first outlet 22, it needs to flow out of the second outlet 52 on the cover body 55. By arranging the second outlet 52 on the cover body 55 and the first outlet 22 on the cover 20, the gas flow needs to flow from the upper end of the shell 50 to the lower end of the shell 50, which can increase the flow path of the gas flow flowing into the mounting cavity 51, increase the heat exchange time of the gas flow flowing into the mounting cavity 51 and the heat exchange pipeline 60, and thus improve the heat exchange effect. Figure 2

[0063] In some embodiments of the present application, as shown in Figure 3 The cover 20 can include a cover body 24 and a boss 25. The inner surface of the cover body 24 is provided with the boss 25, the first inlet 21 penetrates the cover body 24 and the boss 25 in the thickness direction of the cover 20, the boss 25 is provided with the first outlet 22, and the third outlet 23 penetrates the cover body 24. The third outlet 23 is arranged corresponding to the mounting cavity 51, so that the third outlet 23 is in communication with the mounting cavity 51.

[0064] Further, the first outlet 22 includes a first sub-outlet 26 and a second sub-outlet 27, and the first sub-outlet 26 and the second sub-outlet 27 are in communication. As shown in Figure 3 The first sub-outlet 26 is arranged to extend in the thickness direction of the cover 20, and the second sub-outlet 27 is arranged to extend in the radial direction of the cover 20. The gas flow in the separation chamber 11 flows into the space between the shell 50 and the separation barrel 10 in sequence through the first sub-outlet 26 and the second sub-outlet 27.

[0065] ​In some embodiments of the present application, as shown in Figure 3 The cover body 24 and the boss 25 can be configured as an integral molded part, that is, the cover body 24 and the boss 25 are an integral part. This arrangement can reduce the number of components that make up the cover 20, can reduce the number of molds for producing the cover 20, and thus can reduce the mold development cost for producing the cover 20, and further can reduce the production cost of the cover 20.

[0066] In some embodiments of the present application, as shown in Figure 4 A heat insulation member 70 can be provided between the separation barrel 10 and the heat exchange pipeline 60. The heat exchange pipeline 60, the separation barrel 10, the heat insulation member 70, and the shell 50 together define a gas flow channel 61 that communicates the first outlet 22 and the second outlet 52. The heat exchange pipeline 60 is configured in a spiral structure, is sleeved outside the separation barrel 10 and the heat insulation member 70, and is arranged between the shell 50 and the separation barrel 10. The heat exchange pipeline 60 is in contact with the shell 54, the separation barrel 10, and the heat insulation member 70, so that the heat exchange pipeline 60, the separation barrel 10, the heat insulation member 70, and the shell 50 together define the gas flow channel 61. The gas flows into the gas flow channel 61 through the first outlet 22, and the gas flowing into the gas flow channel 61 exchanges heat with the heat exchange pipeline 60. It can also be understood that the low-temperature and low-pressure gaseous refrigerant flowing into the gas flow channel 61 exchanges heat with the high-temperature and high-pressure liquid refrigerant flowing in the heat exchange pipeline 60, so that the temperature of the low-temperature and low-pressure gaseous refrigerant flowing into the gas flow channel 61 is increased, and the temperature of the refrigerant flowing into the expansion valve is reduced, thereby further improving the refrigeration efficiency of the heat exchanger (i.e., the evaporator).

[0067] In some embodiments of the present application, as shown in Figure 5 The heat insulation member 70 can be a heat insulation pipe, is sleeved on the outer surface of the separation barrel 10, and is arranged between the separation barrel 10 and the heat exchange pipeline 60. The heat insulation member 70 has a heat insulation effect. When the high-temperature and high-pressure liquid refrigerant flows in the heat exchange pipeline 60, the heat insulation effect of the heat insulation member 70 can prevent the high-temperature and high-pressure liquid refrigerant flowing in the heat exchange pipeline 60 from transferring heat to the separation barrel 10, and can prevent the temperature of the separation barrel 10 from rising.

[0068] In some embodiments of the present application, as shown in Figure 3As shown, the gas-liquid separator 100 can further include a filter 80 arranged in the housing 50 and covering the second outlet 52. Further, the filter 80 has a filtering effect, and can be arranged as a filter screen. The filter 80 is installed between the cover 55 and the separation cylinder 10, and further supported therebetween. The filter 80 covers the second outlet 52, and the gas flow flows into the gas flow channel 61 through the first outlet 22. The gas flow flowing into the gas flow channel 61 flows through the filter 80 before flowing into the second outlet 52. When the gas flow flows through the filter 80, the filter 80 filters the gas flow, which can prevent impurities and other substances from flowing into the compressor through the second outlet 52, and can ensure the working reliability of the compressor.

[0069] In some embodiments of the present application, as shown in ​ and ​ As shown, the bottom wall of the connecting chamber 44 can be provided with an oil return hole 45 penetrating through the bottom wall of the connecting chamber 44, and the oil return hole 45 communicates the connecting chamber 44 and the separation chamber 11. The first inlet 21 communicates with the evaporator outlet of the evaporator. The low-temperature and low-pressure gas-liquid mixed refrigerant (gas-liquid mixture) after heat exchange of the evaporator flows into the inlet pipe 30 from the first inlet 21, and then flows out from the outlet end of the inlet pipe 30 toward the periphery of the separation chamber 11 and enters the separation chamber 11. The gas-liquid mixture moves spirally toward the lower part of the separation cylinder 10. The liquid droplets in the gas-liquid mixture are thrown onto the inner surface of the side wall of the separation chamber 11 due to the larger centrifugal force, and adhere to the inner surface of the side wall of the separation chamber 11. Since the inner surface of the side wall of the separation chamber 11 has an included angle with the depth direction of the separation chamber 11, for example, as shown in ​ from the upper end to the lower end of the separation chamber 11, the inner surface of the side wall of the separation chamber 11 extends obliquely toward the inside of the separation chamber 11. When the liquid droplets flow downward along the inner surface of the side wall of the separation chamber 11, the liquid droplets can continuously contact the inner surface of the side wall of the separation chamber 11, and the liquid droplets are not taken away by the gas flow, so that the liquid droplets are separated from the gas-liquid mixture. The liquid droplets can be collected at the bottom of the separation cylinder 10. During the separation process, the refrigeration oil in the low-temperature and low-pressure gas-liquid mixed refrigerant is also separated out and accumulated at the bottom of the separation cylinder 10. The refrigeration oil at the bottom of the separation cylinder 10 can flow into the connecting chamber 44 from the oil return hole 45. After the gas flow flows into the connecting chamber 44 along the second pipe body 42, the refrigeration oil in the connecting chamber 44 can flow into the first pipe body 41 along with the gas flow. Finally, the refrigeration oil can flow back to the compressor along with the separated gas, so that the compressor can be prevented from lacking oil.

[0070] Further, the bottom wall of the connecting chamber 44 can be provided with a plurality of oil return holes 45, and two adjacent oil return holes 45 are spaced apart, which can ensure that the refrigerant oil at the bottom of the separation barrel 10 can flow into the connecting chamber 44. After the gas flow flows into the connecting chamber 44 along the second pipe body 42, it can be ensured that the refrigerant oil can flow back to the compressor along with the gas flow, thereby avoiding the lack of oil in the compressor.

[0071] In some embodiments of the application, the shell 54 and the cover 55 can be configured as an integrally formed member, that is, the shell 54 and the cover 55 are an integral part. This arrangement can reduce the number of components that make up the shell 50, which can reduce the number of molds for producing the shell 50, thereby reducing the mold development cost of producing the shell 50, and further reducing the production cost of the shell 50.

[0072] In some embodiments of the application, the shell 54 and the cover 55 can be provided as two separate components, and the shell 54 and the cover 55 are detachably connected. Further, the shell 54 and the cover 55 can be connected by threads, for example, the shell 54 is provided with internal threads, and the cover 55 is provided with external threads. The internal threads of the shell 54 and the external threads of the cover 55 are threadedly connected. This arrangement facilitates the assembly and disassembly of the shell 54 and the cover 55, and can improve the assembly efficiency of the shell 54 and the cover 55, and can also improve the disassembly efficiency of the shell 54 and the cover 55.

[0073] Further, the shell 54 and the cover 55 can be connected by bolts, for example, the shell 54 can be provided with a first bolt hole, and the cover 55 can be provided with a second bolt hole. The first bolt hole and the second bolt hole are correspondingly arranged, and the inner surface of the first bolt hole and / or the inner surface of the second bolt hole is provided with internal threads. By passing a bolt through the first bolt hole and the second bolt hole, the shell 54 and the cover 55 can be reliably assembled together, effectively preventing the shell 54 and the cover 55 from separating, and facilitating the assembly and disassembly of the shell 54 and the cover 55, which can improve the assembly efficiency of the shell 54 and the cover 55, and can also improve the disassembly efficiency of the shell 54 and the cover 55.

[0074] Further, the shell 54 and the cover 55 can be connected by bolts, for example, the shell 54 can be provided with a first bolt hole, and the cover 55 can be provided with a second bolt hole. The first bolt hole and the second bolt hole are correspondingly arranged, and the inner surface of the first bolt hole and / or the inner surface of the second bolt hole is provided with internal threads. By passing a bolt through the first bolt hole and the second bolt hole, the shell 54 and the cover 55 can be reliably assembled together, effectively preventing the shell 54 and the cover 55 from separating, and facilitating the assembly and disassembly of the shell 54 and the cover 55, which can improve the assembly efficiency of the shell 54 and the cover 55, and can also improve the disassembly efficiency of the shell 54 and the cover 55.

[0075] Further, the shell 54 and the cover 55 can be connected by welding, which can reliably assemble the shell 54 and the cover 55 together, effectively prevent the shell 54 and the cover 55 from separating, and the cover 55 can seal the lower end of the shell 54.

[0076] Further, the shell 54 and the cover 55 can be connected by clamping, for example, the shell 54 can be provided with a first clamping part, and the cover 55 can be provided with a second clamping part, the first clamping part and the second clamping part are clamped and connected, the first clamping part can be one of a clamping groove and a clamping protrusion, and the second clamping part can be the other one of the clamping groove and the clamping protrusion, by clamping the first clamping part and the second clamping part, the shell 54 and the cover 55 can be reliably assembled together, effectively prevent the shell 54 and the cover 55 from separating, and facilitate the assembly and disassembly of the shell 54 and the cover 55, which can improve the assembly efficiency of the shell 54 and the cover 55, and also improve the disassembly efficiency of the shell 54 and the cover 55.

[0077] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A gas-liquid separator, characterized in that, include: A separation barrel defining a separation chamber open at one end, wherein the inner surface of the side wall of the separation chamber forms an angle with the depth direction of the separation chamber; A cover is installed at the open end of the separation chamber, and the cover has a first inlet and a first outlet, both of which are connected to the separation chamber. An inlet pipe is provided in the separation chamber and communicates with the first inlet, and the outlet end of the inlet pipe is adapted to guide the gas-liquid mixture toward the circumference of the separation chamber; A separation tube is disposed in the separation chamber, and the airflow in the separation chamber flows through the separation tube to the first outlet, wherein the separation tube has a gas-liquid separation function for the airflow; The separation tube includes: a first tube body and a second tube body, the first tube body and the second tube body are connected, the end of the first tube body away from the second tube body is connected to the first outlet, and the end of the second tube body away from the first tube body is disposed near the cap; from the open end of the separation chamber to the bottom wall of the separation chamber, the inner surface of the first tube body extends obliquely toward the outside of the first tube body.

2. The gas-liquid separator according to claim 1, characterized in that, From the open end of the separation chamber to the bottom wall of the separation chamber, the inner surface of the side wall of the separation chamber extends obliquely toward the interior of the separation chamber.

3. The gas-liquid separator according to claim 1, characterized in that, Both the first tube and the second tube extend in the depth direction of the separation chamber. The end of the first tube near the bottom wall of the separation chamber is connected to the end of the second tube near the bottom wall of the separation chamber. The end of the first tube near the cap is connected to the first outlet.

4. The gas-liquid separator according to claim 3, characterized in that, The separation tube further includes a connecting portion that defines a connecting chamber, wherein the ends of the first tube near the bottom wall of the separation chamber and the ends of the second tube near the bottom wall of the separation chamber are connected to the connecting chamber.

5. The gas-liquid separator according to claim 4, characterized in that, The bottom wall of the connecting chamber is provided with an oil return hole.

6. The gas-liquid separator according to any one of claims 1-5, characterized in that, It also includes: a housing defining an open mounting cavity, a cap sealing the open end of the mounting cavity, a first outlet communicating with the mounting cavity, a separation bucket disposed within the mounting cavity and spaced apart from the housing, and the housing having a second outlet communicating with the mounting cavity.

7. The gas-liquid separator according to claim 6, characterized in that, Also includes: The heat exchange pipeline has a second inlet on the outer shell and a third outlet on the cover or the outer shell. The heat exchange pipeline is located between the outer shell and the separation tank and connects the second inlet and the third outlet.

8. The gas-liquid separator according to claim 7, characterized in that, The heat exchange pipeline extends along the length of the separation tank and is arranged around the outside of the separation tank.

9. The gas-liquid separator according to claim 7, characterized in that, The outer casing includes a housing and a cover, the housing and the cover together defining the mounting cavity, the cover being constructed as the bottom wall of the mounting cavity, the second inlet and the second outlet being located on the cover, and the third outlet being located on the cover.

10. The gas-liquid separator according to claim 9, characterized in that, A heat exchanger is provided between the heat exchange pipeline and the separation tank. The heat exchange pipeline, the outer shell, the heat insulation, and the separation tank together define a gas flow channel, which connects the first outlet and the second outlet.

11. The gas-liquid separator according to claim 6, characterized in that, Also includes: A filter element, which is disposed inside the housing and covers the second outlet.

Images