Gas-liquid separator assembly and vehicle

Abstract

The utility model provides a gas-liquid separator assembly and a vehicle, and relates to the technical field of vehicle parts, the gas-liquid separator assembly comprises a gas-liquid separator and a communicating piece, one end of a first flow channel in the communicating piece is communicated with a first inlet of the gas-liquid separator through a gas inlet pipe, and the other end of the first flow channel is communicated with a second inlet of the gas-liquid separator through a gas outlet pipe; the other end of the first flow channel is used for being communicated with a bypass valve on a compressor exhaust pipeline through a communicating pipeline. One end of the second runner is communicated with the first runner, and the other end of the second runner is communicated with the bottom of the gas-liquid separator through a drainage pipe; and at least at the connecting part of the first flow channel and the second flow channel, the cross section area of the first flow channel is larger than that of the second flow channel. According to the gas-liquid separator assembly, the communicating piece is arranged, and the cross sectional areas of the first flow channel and the second flow channel are limited, so that liquid substances at the bottom of the gas-liquid separator can enter the gas-liquid separator through the gas inlet pipe, and the superheat degree of suction of a compressor is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle parts technical field, especially a kind of gas-liquid separator assembly. BACKGROUND

[0002] Gas-liquid separator is important equipment in heat pump air conditioning system, its main function is: store liquid refrigerant in air conditioning system, adjust system refrigerant circulation under different working conditions, gas-liquid separation can also be carried out to the refrigerant of gas-liquid two-phase mixture, prevent liquid refrigerant from flowing into compressor, to prevent "liquid strike" of compressor, benefit to ensure the reliability of compressor operation.

[0003] The existing gas-liquid separator, its shell is generally provided with the import for gas-liquid mixture to enter and the export for gas to flow out after gas-liquid separation, gas-liquid mixture realizes gas-liquid separation in the process of flowing from import to export.

[0004] When heat pump air conditioning system load reduces, suction pressure drops, compressor exhaust part bypass valve opens, part high-pressure gas is directly bypassed into gas-liquid separator, high-pressure gas mixes with low-pressure gas, can increase the return gas pressure of heat pump management system, to prevent compressor from working under too low pressure.

[0005] Due to the addition of high-pressure gas, the superheat of compressor suction can increase, to prevent compressor suction overheating, liquid injection device is generally used, refrigerant liquid is injected into compressor suction port to reduce suction superheat. However, the existing injection device generally includes fluid source, injection pipe and injection head, and the structure is relatively complex. SUMMARY

[0006] Therefore, the utility model aims at providing a kind of gas-liquid separator assembly, its structure is simple, and benefit to reduce the suction superheat of compressor.

[0007] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0008] A kind of gas-liquid separator assembly, including gas-liquid separator, and the communication piece with first flow channel and second flow channel;

[0009] One end of the first flow channel is communicated with the first import of the gas-liquid separator through the air inlet pipe, and the other end of the first flow channel is used to communicate with the bypass valve on the compressor exhaust pipeline;

[0010] One end of the second flow channel is communicated with the first flow channel, and the other end is communicated with the bottom of the gas-liquid separator through the flow guide pipe;

[0011] At least at the connecting position of the first flow channel and the second flow channel, the cross-sectional area of the first flow channel is larger than that of the second flow channel; during the process of the gas-liquid mixture flowing into the gas-liquid separator through the first flow channel and the gas inlet pipe, the liquid substance at the bottom of the gas-liquid separator can enter the gas-liquid separator through the drainage pipe, the communicating member and the gas inlet pipe.

[0012] Further, the first flow channel has a first communicating section and a second communicating section, the cross-sectional area of the first communicating section is smaller than that of the second communicating section; one end of the first communicating section and the second communicating section are communicated, the other end of the first communicating section is communicated with the bypass valve, and the other end of the second communicating section is communicated with the gas inlet pipe.

[0013] Further, the cross-sectional area of the second flow channel is smaller than that of the first communicating section; the second flow channel is communicated with the first communicating section, or the second flow channel is communicated with the second communicating section.

[0014] Further, the cross-sectional area of the gas inlet pipe is smaller than that of the first communicating section, and the cross-sectional area of the gas inlet pipe is larger than that of the second communicating section; and / or, the cross-sectional area of the drainage pipe is larger than that of the second flow channel.

[0015] Further, the drainage pipe has a curved section with a middle part protruding upward, and the highest point of the curved section is higher than the connecting position of the drainage pipe and the second flow channel; and / or, the communicating member is provided with a mounting portion for mounting the bypass valve.

[0016] Further, the gas-liquid separator comprises a housing with a containing cavity, and a first partition plate and a second partition plate arranged in the containing cavity; the first partition plate extends along the height direction of the containing cavity, and separates the containing cavity into a first cavity and a second cavity located on both sides of the first partition plate; the second partition plate is arranged in the first cavity, and separates the first cavity into an upper cavity and a lower cavity located on both sides of the second partition plate; the upper cavity and the lower cavity are communicated, and the lower cavity is communicated with the second cavity; the housing is provided with a first inlet communicated with the upper cavity and the gas inlet pipe, and a first outlet communicated with the second cavity; the housing is provided with a second inlet communicated with the upper cavity and an evaporator, and / or, the housing is provided with a second inlet communicated with the lower cavity and an evaporator.

[0017] Further, the second partition piece is arranged in the second cavity, and the third flow channel and the fourth flow channel extending along the height direction of the accommodating cavity are arranged in the second partition piece, the upper portion of the third flow channel is communicated with the second cavity, the upper portion of the fourth flow channel is communicated with the first outlet, and the lower portions of the third flow channel and the fourth flow channel are communicated.

[0018] Further, the bottom of the second partition piece is provided with a communication cavity, a third communication part for communicating the communication cavity with the second cavity is arranged on the side wall of the communication cavity, and a communication hole for communicating with the fourth flow channel is arranged on the top wall of the communication cavity.

[0019] Further, the first flow guide part is arranged in the upper cavity and is used for guiding the fluid entering the upper cavity from the first inlet to bend and flow to the communication part between the upper cavity and the lower cavity, and / or a plurality of partition plates are arranged in the lower cavity, the lower cavity is divided into a plurality of sub-chambers by the plurality of partition plates, and the communication ports for communicating the sub-chambers on both sides of each partition plate are arranged on the partition plate.

[0020] Compared with the prior art, the gas-liquid separator has the following advantages:

[0021] The gas-liquid separator has the following advantages:

[0022] In addition, by arranging the communication piece, forming the first flow channel and the second flow channel in the communication piece, the gas-liquid separator, the air inlet pipe and the drainage pipe can be conveniently connected together through the communication piece, and the assembly is simpler and more convenient, and in the process of flowing of the gas-liquid mixture from the air inlet pipe into the gas-liquid separator, the liquid material at the bottom of the gas-liquid separator can smoothly enter the gas-liquid separator through the drainage pipe and the air inlet pipe.

[0023] In addition, by having the first flow channel include a first communication section and a second communication section, and defining the cross-sectional area of the first communication section to be smaller than the cross-sectional area of the second communication section, the flow rate and pressure of the gas-liquid mixture entering the gas-liquid separator can be precisely controlled. The smaller cross-sectional area results in a higher flow rate and pressure in the first communication section, while the larger cross-sectional area in the second communication section allows the pressure and flow rate to be properly released and distributed. This change in cross-sectional area facilitates increasing the flow rate of the liquid substance from the draft tube into the upper portion of the gas-liquid separator, thereby increasing the speed at which the liquid substance can exchange heat with the gas stream about to flow out of the upper portion of the gas-liquid separator, and effectively reducing the superheat of the compressor suction.

[0024] One end of the second flow channel is in communication with the first communication section, and the cross-sectional area of the second flow channel is smaller than the cross-sectional area of the first communication section. When the gas-liquid mixture enters the first communication section from the inlet pipe, the flow rate increases due to the decrease in cross-sectional area, and the pressure decreases, thereby attracting the fluid in the draft tube to flow from the second flow channel into the first communication section. Due to the decrease in cross-sectional area, the flow rate further increases. This design facilitates more effectively attracting the liquid substance at the bottom of the gas-liquid separator into the gas-liquid separator, thereby increasing the speed at which the liquid substance exchanges heat with the gas stream about to flow out of the upper portion of the gas-liquid separator, and effectively reducing the superheat of the compressor suction. The other end of the second flow channel is in communication with the second communication section, and the cross-sectional area of the second flow channel is smaller than the cross-sectional area of the second communication section, which has a similar effect and will not be described again.

[0025] The cross-sectional area of the inlet pipe is defined to be smaller than the cross-sectional area of the first communication section, and the cross-sectional area of the inlet pipe is defined to be larger than the cross-sectional area of the second communication section, both of which are to ensure that the fluid flows smoothly and quickly from the inlet pipe into the gas-liquid separator. The cross-sectional area of the draft tube is defined to be larger than the cross-sectional area of the second flow channel, which is to smoothly attract the liquid substance at the bottom of the gas-liquid separator into the gas-liquid separator.

[0026] The curved section is provided on the draft tube, and the highest point of the curved section is defined to prevent the refrigerant from flowing reversely from the gas-liquid separator through the inlet pipe. The mounting portion is provided on the communication member to facilitate the installation of the expansion valve and the overall arrangement.

[0027] The first partition and the second partition are provided in the gas-liquid separator to divide the cavity into a first cavity and a second cavity, and divide the first cavity into an upper cavity and a lower cavity. Two inlets and one outlet are provided, the second inlet is used to communicate the lower cavity with the evaporator, and the fluid such as the gas-liquid mixture entering from the first inlet can flow out of the first outlet through the upper cavity, the lower cavity, and the second cavity in sequence. The fluid such as the gas-liquid mixture entering from the second inlet does not pass through the upper cavity, but passes through the lower cavity and the second cavity to flow out of the first outlet. The second inlet is also used to communicate the upper cavity with the evaporator, which can also allow the gas-liquid mixture downstream of the evaporator to smoothly enter the gas-liquid separator.

[0028] The second partition is provided with a third flow channel and a fourth flow channel in the interior, so that the gas-liquid mixture entering the second cavity can flow from the upper part of the third flow channel to the lower part of the third flow channel, then flow from the lower part of the third flow channel to the fourth flow channel, and then flow out from the first outlet, thereby improving the gas-liquid separation effect.

[0029] The lower part of the second partition is provided with a communication cavity, so that the liquid refrigerant and the lubricating oil in the gas-liquid mixture can be separated from the gas during the flow of the third flow channel and the fourth flow channel, and under the suction of the compressor, the liquid substances such as the liquid refrigerant and the lubricating oil in the communication cavity can flow to the fourth flow channel from the communication hole, and then rapidly vaporize and enter the compressor together with the lubricating oil.

[0030] The first flow guide part is arranged in the upper cavity to guide the fluid to flow from the first inlet to the second communication part in a curved manner, thereby prolonging the flow path of the fluid and further improving the gas-liquid separation effect. The plurality of first flow guide plates are arranged in a certain arrangement manner, thereby increasing the contact probability of the fluid with the first flow guide plates, increasing the flow resistance of the refrigerant, reducing the flow speed of the refrigerant, and thereby improving the gas-liquid separation effect and reducing the flow sound of the refrigerant. The partition plate is arranged to increase the contact probability of the fluid with the partition plate, increase the flow resistance of the refrigerant, reduce the flow speed of the refrigerant, and thereby further improve the gas-liquid separation effect.

[0031] Another purpose of the utility model is to provide a vehicle, the heat pump air conditioning system of vehicle is equipped with the gas-liquid separator assembly as described above.

[0032] The vehicle has the gas-liquid separator assembly as described above applied in the heat pump air conditioning system, so that the structure is simplified, the cost is reduced, and the overheating degree of the suction of the compressor can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings that form a part of the utility model are used to provide a further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0034] Figure 1 It is a structure schematic view of the gas-liquid separator assembly of the utility model embodiment one;

[0035] Figure 2 It is a structure schematic view of the gas-liquid separator assembly of the utility model embodiment one; Figure 1 It is a schematic view of the structure shown in the figure without assembling the shell, the air inlet pipe and the drainage pipe;

[0036] Figure 3 It is a schematic view of the structure shown in the figure from another perspective; Figure 2 ​

[0037] Figure 4 The structure schematic view of the lower shell of the utility model embodiment one is shown in the figure;

[0038] Figure 5 The structure schematic view of the second partition of the utility model embodiment one is shown in the figure;

[0039] Figure 6 The structure schematic view of the utility model embodiment one is shown in the figure along the section view of A-A line; Figure 5

[0040] Figure 7 The structure schematic view of the utility model embodiment one is shown in the figure along the section view of B-B line;

[0041] Figure 8 The structure schematic view of the utility model embodiment one is shown in the figure along the section view of B-B line; Figure 7

[0042] The structure schematic view of the upper shell of the utility model embodiment one is shown in the figure; Figure 9

[0043] The structure schematic view of the lower shell of the utility model embodiment one is shown in the figure again; Figure 10

[0044] The principle block diagram of the heat pump management system of the utility model embodiment one is shown in the figure; Figure 11

[0045] The principle block diagram of the structure shown in the figure under heating working condition is shown in the figure; Figure 12 Figure 11 The principle block diagram of the structure shown in the figure under heating working condition is shown in the figure.

[0046] Figure 13 The principle block diagram of the structure shown in the figure under heating working condition is shown in the figure. Figure 11

[0047] Mark explanation:

[0048] 1, gas-liquid separator;2, compressor;3, condenser;4, first expansion valve;5, evaporator;6, heat exchange part;7, heat exchange pipeline;8, second expansion valve;9, third expansion valve;10, first pressure sensor;11, second pressure sensor;12, first temperature sensor;13, second temperature sensor;14, third temperature sensor;15, communication pipeline;16, check valve;17, drainage pipe;18, air inlet pipe;19, communication piece;

[0049] 101, shell;102, first partition;103, second partition;104, first baffle;105, partition plate;106, filter part;

[0050] 1011, upper shell; 1012, lower shell; 1013, containing cavity; ​​​

[0051] 10111, first inlet; 10112, first outlet;

[0052] 10121, second inlet; 10122, second outlet; 10123, protrusion;

[0053] 10131, first cavity; 10132, second cavity;

[0054] 101311, upper cavity; 101312, lower cavity;

[0055] 1021, first partition; 1022, second partition;

[0056] 10212, communication part of lower cavity and second cavity; 10221, communication part of upper cavity and lower cavity; 10222, liquid falling hole;

[0057] 1031, third flow channel; 1032, fourth flow channel; 1033, communication cavity;

[0058] 10331, communication hole; 10332, third communication part;

[0059] 1052, second communication port;

[0060] 1901, first flow channel; 1902, second flow channel;

[0061] 19011, first communication section; 19012, second communication section. DETAILED DESCRIPTION

[0062] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0063] In the description of the present application, it should be noted that the directions or position relationships indicated by the terms "upper", "lower" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0064] In addition, in the embodiments of the utility model, in the description of the utility model, unless otherwise clearly limited, the terms "mounting", "connecting", "connection", "connecting piece" should be understood broadly. For example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with specific circumstances.

[0065] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0066] Embodiment one

[0067] The embodiment relates to a gas-liquid separator assembly, which is provided with a communicating piece on the gas-liquid separator, and connects the gas inlet pipe and the drainage pipe through the communicating piece, and limits the cross-sectional area of the flow channel in the communicating piece, so that the structure is simple, and the overheating degree of the compressor suction gas can be effectively reduced.

[0068] Based on the above design idea, an exemplary structure of the gas-liquid separator assembly of the embodiment is shown in Figure 1 and Figure 8 As a whole, the gas-liquid separator assembly of the embodiment comprises a gas-liquid separator 1 and a communicating piece 19 with a first flow channel 1901 and a second flow channel 1902.

[0069] The one end of the first flow channel 1901 is communicated with the first inlet 10111 of the gas-liquid separator 1 through the gas inlet pipe 18, and the other end of the first flow channel 1901 is used for being communicated with the bypass valve on the exhaust pipe of the compressor 2; the one end of the second flow channel 1902 is communicated with the first flow channel 1901, and the other end is communicated with the bottom of the gas-liquid separator 1 through the drainage pipe 17.

[0070] At least at the connecting position of the first flow channel 1901 and the second flow channel 1902, the cross-sectional area of the first flow channel 1901 is greater than that of the second flow channel 1902, so that in the process of the gas-liquid mixture flowing into the gas-liquid separator 1 through the first flow channel 1901 and the gas inlet pipe 18, the drainage pipe 17 can make the liquid material at the bottom of the gas-liquid separator 1 enter the gas-liquid separator 1 through the drainage pipe 17, the communicating piece 19 and the gas inlet pipe 18.

[0071] Specifically, according to Bernoulli's principle, the greater the velocity of a fluid, the less its pressure; conversely, the smaller the velocity of a fluid, the greater its pressure. Therefore, in the structure as above, since the cross-sectional area of the first flow channel 1901 is greater than that of the second flow channel 1902, the pressure of the fluid will decrease when the fluid enters the first flow channel 1901 from the second flow channel 1902, thus facilitating the increase of the flow rate of the fluid entering the first flow channel 1901 from the second flow channel 1902.

[0072] The gas-liquid separator assembly of the present embodiment, by providing the communication member 19, enables the compressor exhaust to enter the gas-liquid separator 1 through the communication member 19 and the intake pipe 18, and by providing the drainage pipe 17, which is connected between the bottom of the gas-liquid separator 1 and the communication member 19, and by defining the cross-sectional areas of the first flow channel 1901 and the second flow channel 1902, the liquid substance at the bottom of the gas-liquid separator 1 can be attracted to enter the upper portion of the gas-liquid separator 1 through the drainage pipe 17, the communication member 19 and the intake pipe 18 during the process of the compressor exhaust entering the gas-liquid separator 1 through the communication pipe 15, the first flow channel 1901, the intake pipe 18 and the first inlet 10111. Since the temperature of the liquid substance is lower than that of the gas flow out of the gas-liquid separator 1, the liquid substance entering the upper portion of the gas-liquid separator 1 can exchange heat with the gas flow about to flow out of the upper portion of the gas-liquid separator 1, thereby reducing the superheat of the suction gas of the compressor 2.

[0073] As shown in Figure 1 , Figure 7 and Figure 8 , as a preferred embodiment, the communication member 19 is fixedly arranged on the shell 101 of the gas-liquid separator 1, for example, by screwing, welding, clamping or the like, to facilitate the arrangement of the intake pipe 18, the drainage pipe 17 and the expansion valve to be described below.

[0074] Here, by forming the first flow channel 1901 and the second flow channel 1902 in the communication member 19, and by making the cross-sectional area of the second flow channel 1902 smaller than that of the first flow channel 1901, the gas-liquid separator 1, the intake pipe 18 and the drainage pipe 17 can be conveniently connected together through the communication member 19, which makes the assembly simpler and more convenient, and enables the liquid substance at the bottom of the gas-liquid separator 1 to smoothly enter the gas-liquid separator 1 through the drainage pipe 17 and the intake pipe 18 during the process of the gas-liquid mixture flowing into the gas-liquid separator 1 from the intake pipe 18.

[0075] As a preferred embodiment, still referring to Figure 7 and Figure 8As shown, the first flow channel 1901 has a first connecting section 19011 and a second connecting section 19012, and the cross-sectional area of ​​the first connecting section 19011 is smaller than the cross-sectional area of ​​the second connecting section 19012. Specifically, one end of the first connecting section 19011 and the second connecting section 19012 are connected together, and the other end of the first connecting section 19011 is connected to the aforementioned bypass valve, for example, by adding a connecting pipe 15. The other end of the second connecting section 19012 is connected to the first inlet 10111.

[0076] Here, by making the first flow channel 1901 include a first connecting section 19011 and a second connecting section 19012, and defining the cross-sectional area of ​​the first connecting section 19011 as smaller than the cross-sectional area of ​​the second connecting section 19012, it is helpful to accurately control the flow rate and pressure of the gas-liquid mixture entering the gas-liquid separator 1. The smaller cross-sectional area in the first connecting section 19011 generates higher flow rate and pressure, while the larger cross-sectional area in the second connecting section 19012 allows these pressures and flow rates to be properly released and distributed.

[0077] This design with a reduced cross-sectional area helps to more effectively draw the liquid material at the bottom of the gas-liquid separator 1 into the gas-liquid separator 1. Because this design can accelerate the flow rate of the liquid material from the guide pipe 17 into the upper part of the gas-liquid separator 1, it can accelerate the heat exchange rate between the liquid material and the airflow that is about to flow out from the upper part of the gas-liquid separator 1, thereby effectively reducing the superheat of the compressor suction.

[0078] like Figure 8 As shown, in a preferred embodiment, the second flow channel 1902 is connected to the second connecting section 19012, and the cross-sectional area of ​​the second flow channel 1902 is smaller than that of the second connecting section 19012. With this configuration, when the gas-liquid mixture enters the second connecting section 19012 from the inlet pipe 18, the flow velocity increases due to the reduced cross-sectional area, and the pressure decreases. This attracts fluid from the guide pipe 17 from the second flow channel 1902 into the second connecting section 19012, further increasing the flow velocity due to the reduced cross-sectional area.

[0079] This design helps to more effectively draw the liquid material at the bottom of the gas-liquid separator 1 into the gas-liquid separator 1, thereby accelerating the heat exchange between the liquid material and the airflow that is about to flow out from the top of the gas-liquid separator 1, which helps to effectively reduce the superheat of the compressor 2 intake.

[0080] It should be noted that, in addition to being connected to the second connecting section 19012, the second flow channel 1902 can also be connected to the first connecting section 19011 as another preferred embodiment.

[0081] In this way, when the gas-liquid mixture enters the first communicating section 19011 from the inlet pipe 18, the flow rate will increase due to the decrease in cross-sectional area, and the pressure will decrease, thereby attracting the fluid in the second flow channel 1902 of the drain pipe 17 to flow into the first communicating section 19011, and the flow rate will further increase due to the decrease in cross-sectional area. This design also helps to more effectively attract the liquid substance at the bottom of the gas-liquid separator 1 into the gas-liquid separator 1, thereby facilitating effective reduction of the superheat of the suction gas of the compressor 2.

[0082] Continuing to refer to the drawings, as a preferred embodiment, Figure 1 , Figure 7 and Figure 8 it can be seen from Figure 1 that the cross-sectional area of the inlet pipe 18 is smaller than the cross-sectional area of the first communicating section 19011, and Figure 8 that the cross-sectional area of the inlet pipe 18 is larger than the cross-sectional area of the second communicating section 19012, both of which are to ensure that the fluid flows smoothly and quickly from the inlet pipe 18 into the gas-liquid separator 1.

[0083] To facilitate connection with the inlet pipe 18, a section of the second communicating section 19012 facing the inlet pipe 18 is provided with a transition section and a plug-in section in sequence, both of which are formed on the communicating member 19. The transition section is in the shape of a circular truncated cone, and the plug-in section allows the inlet pipe 18 to be partially inserted therein, thereby improving the connection reliability of the inlet pipe 18 with the communicating member 19. The inlet pipe 18 and the communicating member 19 can be connected together by, for example, adhesion, welding, screwing, or the like.

[0084] As a preferred embodiment, the cross-sectional area of the drain pipe 17 is larger than the cross-sectional area of the second flow channel 1902, which is to facilitate the attraction of the liquid substance at the bottom of the gas-liquid separator 1 into the gas-liquid separator 1.

[0085] In a preferred embodiment, the cross-sectional area of the drain pipe 17 is smaller than the cross-sectional area of the inlet pipe 18, to facilitate the attraction of the liquid substance at the bottom of the gas-liquid separator 1 into the gas-liquid separator 1.

[0086] In a preferred embodiment, the inner diameter of the inlet pipe 18 and the communicating pipeline 15 (the pipeline between the bypass valve and the communicating member 19) is between 8 mm and 10 mm, such as 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, or the like. The inner diameter of the first communicating section 19011 is between 14 mm and 17 mm, such as 14 mm, 14.5 mm, 15 mm, 15.5 mm, 16 mm, 17 mm, or the like. The inner diameter of the second communicating section 19012 is between 4 mm and 6 mm, such as 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, or the like.

[0087] In a preferred embodiment, the inner diameter of the drain pipe 17 is between 4mm and 6mm, such as 4mm, 4.5mm, 5mm, 5.5mm, 6mm, etc. The inner diameter of the second flow channel 1902 is between 2mm and 3mm, such as 2mm, 2.26mm, 2.5mm, 2.83mm, 3mm, etc.

[0088] It should be understood that the defined sizes, such as the inner diameter of the inlet pipe 18 and the communication pipe 15, the inner diameter of the second communication section 19012, the inner diameter of the drain pipe 17, and the inner diameter of the second flow channel 1902, can also be set according to actual needs.

[0089] In a preferred embodiment, as shown in Figure 8 The included angle a between the first flow channel 1901 and the second flow channel 1902 is an acute angle, for example, the included angle a can be 30°, 45°, 60°, etc.

[0090] As a preferred embodiment, as shown in Figure 7 The drain pipe 17 has a curved section that protrudes upward in the middle, for example, in this embodiment, the curved section extends upward from the connection between the drain pipe 17 and the second flow channel 1902, extends downward after reaching the highest point, and communicates with the bottom of the gas-liquid separator 1.

[0091] In a preferred embodiment, the highest point of the curved section is higher than the connection between the drain pipe 17 and the second flow channel 1902, for example, in this embodiment, the highest point of the curved section is at least 35mm higher than the connection between the drain pipe 17 and the second flow channel 1902, such as 35mm, 40mm, 50mm, etc., to effectively prevent the reverse flow of refrigerant from the gas-liquid separator 1 through the inlet pipe 18. It should be noted that the highest point of the curved section should be lower than the position of the first inlet 10111.

[0092] It should be noted that the highest point of the curved section can be higher than the connection between the drain pipe 17 and the second flow channel 1902 by other values, and it should be understood that the greater the height difference between the highest point of the curved section and the connection between the drain pipe 17 and the second flow channel 1902, the greater the pressure difference formed, which is easy to maintain the continuity of the liquid flow in the drain pipe 17, and can prevent the liquid from being interrupted in the drain pipe 17.

[0093] As a preferred embodiment, the communication member 19 is provided with a mounting portion for mounting a bypass valve, which is the third expansion valve described below. By providing a mounting portion on the communication member 19, the installation of the expansion valve is facilitated, and the overall arrangement is also facilitated.

[0094] Next, the structure of the gas-liquid separator 1 of this embodiment will be described in detail, still referring to Figures 1 to 3As shown, it comprises a housing 101 with a containing cavity 1013, and a first partition 102 arranged in the containing cavity 1013, the first partition 102 comprising a first partition plate 1021, and a second partition plate 1022 arranged on one side of the first partition plate 1021.

[0095] Specifically, the first partition plate 1021 extends along the height direction of the containing cavity 1013, and divides the containing cavity 1013 into a first cavity 10131 and a second cavity 10132 on both sides of the first partition plate 1021; the second partition plate 1022 is arranged in the first cavity 10131, and divides the first cavity 10131 into an upper cavity 101311 and a lower cavity 101312 on both sides of the second partition plate 1022.

[0096] By Figure 1 In combination Figure 9 And Figure 10 As shown, the housing 101 is provided with a first inlet 10111 communicating with the upper cavity 101311, a second inlet 10121 communicating with the lower cavity 101312, and a first outlet 10112 communicating with the second cavity 10132.

[0097] The first partition plate 1021 is provided with a first communication part, which communicates the lower cavity 101312 and the second cavity 10132, such as Figure 2 The communication part 10212 of the lower cavity 101312 and the second cavity 10132 as shown. The second partition plate 1022 is provided with a second communication part, which communicates the upper cavity 101311 and the lower cavity 101312, such as Figure 2 The communication part 10221 of the upper cavity 101311 and the lower cavity 101312 as shown.

[0098] The gas-liquid separator 1 with the above structure, by arranging the first partition plate 1021 and the second partition plate 1022, divides the cavity into the first cavity 10131 and the second cavity 10132, and divides the first cavity 10131 into the upper cavity 101311 and the lower cavity 101312, while arranging two inlets and one outlet, the fluid such as gas-liquid mixture entering from the first inlet 10111 can flow out from the first outlet 10112 through the upper cavity 101311, the lower cavity 101312 and the second cavity 10132 in turn, while the fluid such as gas-liquid mixture entering from the second inlet 10121 does not pass through the upper cavity 101311, but passes through the lower cavity 101312 and the second cavity 10132 to flow out from the first outlet 10112, and realizes gas-liquid separation in the process of flowing.

[0099] It should be noted that the gas-liquid separator assembly in the embodiment is applied to the heat pump management system, the first inlet 10111 is used to communicate the upper cavity 1011 and the gas inlet pipe 18, and the first outlet 10112 is used to communicate the suction port of the compressor 2, and the second inlet 10121 is used to communicate the lower cavity 1013 and the evaporator 5.

[0100] In the structure above, as shown in Figure 10 , the second inlet 10121 is arranged on the lower shell 1012, and in addition to arranging the second inlet 10121 on the lower shell 1012, the second inlet 10121 can also be arranged on the upper shell 1011 as shown in Figure 9 . When applied to the heat pump management system below, the second inlet 10121 on the lower shell 1012 communicates with the downstream of the evaporator 5, and the second inlet 10121 on the upper shell 1011 communicates with the downstream of the heat exchange part 6 below.

[0101] In order to better understand the gas-liquid separator 1 of the embodiment, the structure of the shell 101 will be described first with reference to Figure 1 and in combination with Figure 9 , Figure 10 . Preferably, the shell 101 includes an upper shell 1011 and a lower shell 1012, and the upper shell 1011 and the lower shell 1012 are fixedly connected, for example, can be connected together by welding, screwing, flange, clamping, bonding and the like. The aforementioned accommodating cavity 1013 is formed between the upper shell 1011 and the lower shell 1012, and the aforementioned first partition 102 and the second partition 103 below are fixedly installed in the accommodating cavity 1013.

[0102] In a preferred embodiment, the shape of the accommodating cavity 1013 is cylindrical, and the axis direction is the height direction of the gas-liquid separator 1. The aforementioned first partition 1021 has a "U" shape in a preferred embodiment, and the first partition 1021 cooperates with the side wall of the accommodating cavity 1013, so that the cross section of the second cavity 10132 is "U" shaped, and the first cavity 10131 forms a half-enclosed structure for the second cavity 10132, thereby facilitating the guarantee of the gas-liquid separation effect.

[0103] It should be understood that the shape of the accommodating cavity 1013 can be other shapes besides cylindrical, such as spherical, cuboid, square, etc., and the cross-sectional shape of the first partition 1021 can be other shapes besides "U" shape, such as rectangular, S-shaped, circular ring-shaped, etc.

[0104] The second partition 1022 is shaped in accordance with the cross-sectional shape of the first cavity 10131, and is arranged orthogonally to the height direction of the gas-liquid separator 1. In the preferred embodiment, the second partition 1022 is arranged close to the upper end in the height direction of the gas-liquid separator 1, so that the volume of the upper cavity 101311 is smaller than the volume of the lower cavity 101312, which facilitates the arrangement of the flow guiding structure and improves the gas-liquid separation effect.

[0105] In the preferred embodiment, as shown in Figure 2 and Figure 3 , the first communication part, i.e. the communication part 10212 of the lower cavity 101312 and the second cavity 10132, is arranged close to the one end of the first partition 1021. Specifically, the first communication part includes a plurality of openings formed on the first partition 1021. Preferably, the upper openings are a plurality of openings with small communication areas and are circular, and the lower opening is one opening with a large communication area and is square. In this way, the plurality of upper openings can achieve a better flow equalization effect, and the lower opening has a smaller resistance.

[0106] It should be noted that the size of the volume of the communication area here is a comparison between the upper first communication part and the lower first communication part. It should be understood that the first communication part can be arranged in other shapes and numbers according to actual needs.

[0107] In the preferred embodiment, the second communication part, i.e. the communication part 10221 of the upper cavity 101311 and the lower cavity 101312, is arranged close to the one end of the upper cavity 101311, which facilitates the gas-liquid separation. Specifically, the first communication part is a notch formed on the second partition 1022, or can be a through hole formed on the second partition 1022. It should be noted that the shape and number of the second communication part are not limited here, as long as the upper cavity 101311 and the lower cavity 101312 can be communicated.

[0108] In order to further improve the gas-liquid separation effect of the gas-liquid separator 1, as a preferred embodiment, the gas-liquid separator 1 of the present embodiment further comprises a second partition 103 arranged in the second cavity 10132, as shown in Figure 5 and Figure 6 , the second partition 103 is provided with a third flow channel 1031 and a fourth flow channel 1032 extending along the height direction of the containing cavity 1013. The upper part of the third flow channel 1031 communicates with the second cavity 10132, the upper part of the fourth flow channel 1032 communicates with the first outlet 10112, and the lower parts of the third flow channel 1031 and the fourth flow channel 1032 are communicated.

[0109] By providing the second separator 103, the fluid entering the second cavity 10132, such as a gas-liquid mixture, can flow upward and enter the third channel 1031 from the upper part. It then flows downward in the third channel 1031 and flows into the fourth channel 1032 from the lower connection between the third channel 1031 and the fourth channel 1032. It then flows upward in the fourth channel 1032 and exits from the first outlet 10112. During the flow, it collides with the side of the first separator 102 facing the second cavity 10132 and with the second separator 103, thereby completing gas-liquid separation and improving the gas-liquid separation effect.

[0110] In a preferred embodiment, the cross-section of the third flow channel 1031 is U-shaped, with its opening facing the fourth flow channel 1032, while the cross-section of the fourth flow channel 1032 is circular. The bottoms of the third flow channel 1031 and the fourth flow channel 1032 are provided with blocking plates, and the lower parts of the third flow channel 1031 and the fourth flow channel 1032 are connected through openings in the partition plates between them, so that the shape of the flow channels within the second partition 103 is a U-shape with the opening facing upwards.

[0111] It should be noted that the cross-section of the third flow channel 1031 can be in other shapes besides "U", such as circular, square, or rhomboid, while the cross-section of the fourth flow channel 1032 can be in other shapes besides circular, such as "U", square, or rhomboid.

[0112] The bottom of the second partition 103 is provided with a connecting cavity 1033. The connecting cavity 1033 and the third flow channel 1031 are separated by the aforementioned blocking plate, and the connecting cavity 1033 and the fourth flow channel 1032 are also separated by the aforementioned blocking plate. The side wall of the connecting cavity 1033 is provided with a third connecting part 10332 that connects the connecting cavity 1033 with the second cavity 10132, and the top wall of the connecting cavity 1033, i.e. the blocking plate, is provided with a connecting hole 10331 that connects with the fourth flow channel 1032.

[0113] In this embodiment, a connecting cavity 1033 is provided at the lower part of the second partition 103. The liquid refrigerant and lubricating oil in the gas-liquid mixture can be separated from the gas during the flow of the third flow channel 1031 and the fourth flow channel 1032. Under the suction of the compressor 2, the liquid substances in the connecting cavity 1033, such as liquid refrigerant and lubricating oil, can flow from the connecting hole 10331 to the fourth flow channel 1032 and quickly vaporize, and enter the compressor 2 together with the lubricating oil.

[0114] In terms of specific structure, such as Figure 2 As shown, there are multiple third connecting portions 10332, and adjacent third connecting portions 10332 are separated by connecting posts extending in the vertical direction, which helps to ensure the structural strength of the second separator 103.

[0115] In a preferred embodiment, the second partition 103 is integrally formed, which is convenient for installation and arrangement in the housing 101. It should be understood that the second partition 103 can also be separately manufactured and assembled into an integral structure.

[0116] In a preferred embodiment, the lower portions of the first cavity 10131 and the second cavity 10132 are communicated, so that the liquid refrigerant and the lubricating oil flowing to the lower portions of the first cavity 10131 and the second cavity 10132 can flow into the communicated cavity 1033.

[0117] As shown in Figure 4 , the bottom wall of the accommodating cavity 1013 is provided with protrusions 10123 protruding into the accommodating cavity 1013. In a preferred embodiment, the protrusions 10123 are a plurality of protrusions, each of which passes through the center of the bottom wall and extends along the radial direction of the bottom wall, and a gap is provided between each protrusion 10123 and the side wall of the accommodating cavity 1013. In this way, when the first partition 102 and the second partition 103 are installed, the lower portions of the two can abut on the protrusions 10123, so that the lower portions of the first cavity 10131 and the second cavity 10132 are communicated.

[0118] It should be understood that the purpose of the protrusions 10123 is to make the lower portions of the first cavity 10131 and the second cavity 10132 flow, so that the liquid refrigerant and the lubricating oil in the lower portion of the accommodating cavity 1013 can flow between the first cavity 10131 and the second cavity 10132. It should be understood that the lower portions of the first cavity 10131 and the second cavity 10132 can of course also be communicated in other ways, such as by providing an opening at the bottom end of the first partition 1021.

[0119] In order to improve the gas-liquid separation effect in the upper cavity 101311, referring to Figure 2 and Figure 3 , as a preferred embodiment, the first inlet 10111 and the second communicated portion (the communicated portion 10221 of the upper cavity 101311 and the lower cavity 101312) are arranged close to the two ends of the upper cavity 101311, which is beneficial to prolong the flow path of the fluid such as gas-liquid mixture, thereby improving the gas-liquid separation effect. It should be understood that the first inlet 10111 can also be provided at other positions convenient for communication with the upper cavity 101311.

[0120] In a further preferred embodiment, referring to Figure 2 and Figure 3 , the upper cavity 101311 is provided with a first flow guide portion, which is used to guide the fluid entering the upper cavity 101311 from the first inlet 10111 to bend and flow to the communicated portion 10221 of the upper cavity 101311 and the lower cavity 101312.

[0121] Here, by setting the first flow guide part in the upper cavity 101311, the fluid can be guided to bend from the first inlet 10111 to the communication part 10221 of the upper cavity 101311 and the lower cavity 101312, and the fluid flow path can be lengthened. During the fluid flow, the fluid such as the liquid refrigerant (refrigerant), lubricating oil and other refrigerants can collide and rub against the inner wall of the upper cavity 101311, resulting in gas-liquid separation. The heavier liquid components such as the liquid refrigerant and the lubricating oil can be deposited at the bottom of the upper cavity 101311, and the lighter gas components continue to flow, which can further improve the gas-liquid separation effect.

[0122] It should be noted that the second partition 1022 is also provided with a liquid falling hole 10222 for communicating the upper cavity 101311 and the lower cavity 101312, and the liquid refrigerant and the lubricating oil falling to the bottom of the upper cavity 101311 can enter the lower cavity 101312 through the second communication part (the communication part 10221 of the upper cavity 101311 and the lower cavity 101312) and the liquid falling hole 10222.

[0123] Still referring to the first flow guide part shown in Figure 2 and Figure 3 , in specific implementation, the first flow guide part includes a plurality of first flow guide plates 104, and the plurality of first flow guide plates 104 are arranged staggered in the flow direction of the fluid from the first inlet 10111 to the communication part 10221 of the upper cavity and the lower cavity.

[0124] As in the present embodiment, the plurality of first flow guide plates 104 are arranged spaced apart in the flow direction of the fluid from the first inlet 10111 to the communication part 10221 of the upper cavity and the lower cavity, and the plurality of first flow guide plates 104 are arranged alternately on both sides of the fluid flow direction in the upper cavity 101311.

[0125] As in the above structure, the plurality of first flow guide plates 104 are arranged and the arrangement mode of the first flow guide plates 104 is limited, which can increase the contact probability of the fluid with the first flow guide plates 104, increase the refrigerant flow resistance, and reduce the refrigerant flow rate, thereby facilitating to improve the gas-liquid separation effect.

[0126] In a preferred embodiment, the number of the first flow guide plates 104 is seven, and each first flow guide plate 104 is in a curved arc shape, so as to further lengthen the fluid flow path and facilitate to increase the collision probability with the fluid. It should be understood that the first flow guide part can be provided in other structures in addition to the plurality of first flow guide plates 104, for example, referring to the structure of the partition plate 105 in the lower cavity 101312 described below. The number of the first flow guide plates 104 can also be other numbers, such as two, four, five, etc.

[0127] In order to improve the gas-liquid separation effect in the lower cavity 101312, as a preferred embodiment, the second inlet 10121 and the first communication part (the communication part 10212 between the lower cavity 101312 and the second cavity 10132) are arranged close to the two ends of the lower cavity 101312, and also to prolong the flow path of the fluid in the lower cavity 101312, so as to improve the gas-liquid separation effect. It should be understood that the second inlet 10121 can also be arranged at other positions which are convenient for communication with the lower cavity 101312.

[0128] In the preferred embodiment, a plurality of partition plates 105 are arranged in the lower cavity 101312, and the plurality of partition plates 105 separate the lower cavity 101312 into a plurality of sub-cavities. Specifically, each partition plate 105 is fixed on one side of the first partition piece 102 and is attached to the side wall of the accommodating cavity 1013 on the other side. The plurality of partition plates 105 are arranged in the circumferential direction of the first partition plate 105, and each partition plate 105 is provided with a communication port for communicating the sub-cavities on both sides of the partition plate 105, so that the plurality of sub-cavities are sequentially communicated.

[0129] In the present embodiment, the partition plate 105 is three, and the lower cavity 101312 is divided into four sub-cavities. The communication port on each partition plate 105 is preferably provided with a plurality of openings to achieve better flow distribution. In the present embodiment, the communication port on each partition plate 105 includes an opening at one end of the partition plate 105, which cooperates with the inner wall of the accommodating cavity 1013 to form a second communication port 1052 at the opening part.

[0130] In addition, the communication port on each partition plate 105 can also include a plurality of first communication ports not shown in the figure arranged on the partition plate 105 to achieve better flow distribution. It should be noted that the shape and number of the first communication port and the second communication port 1052 can be set according to actual needs, or can be referred to the shapes and numbers shown in the and the embodiment will not be described in detail. Figure 2 and Figure 3

[0131] The aforementioned second inlet 10121 is in communication with the sub-cavity farthest from the aforementioned first communication part (the communication part 10212 between the lower cavity 101312 and the second cavity 10132). In this way, the fluid entering the sub-cavity from the second inlet 10121 can sequentially pass through the four sub-cavities, and then flow into the second cavity 10132 from the communication part 10212 between the lower cavity 101312 and the second cavity 10132.

[0132] ​It should be noted that the plurality of partition plates 105 arranged as above is to improve the contact probability with the fluid, increase the flow resistance of the fluid, and achieve better gas-liquid separation effect. It should be understood that the structure arranged in the lower cavity 101312 for facilitating gas-liquid separation can be other structures in addition to the plurality of partition plates 105.

[0133] For example, the second flow guide part is arranged in the lower cavity 101312, and the second flow guide part is used to guide the fluid entering the lower cavity 101312 from the second inlet 10121 to bend and flow to the communication part 10212 between the lower cavity 101312 and the second cavity 10132. For details, reference can be made to the structure of the first flow guide part.

[0134] It should be noted that in the embodiment, the first partition plate 1021, the second partition plate 1022, the first flow guide plate 104, and the partition plate 105 are preferably integrated into an integrated structure to facilitate installation in the shell 101. In addition, these components can of course be separately processed and then assembled into an integrated structure.

[0135] In order to improve the performance of the gas-liquid separator 1, as a preferred embodiment, the shell 101 is provided with a flow guide pipe 17, which communicates the lower part of the first cavity 10131 with the upper cavity 101311, so that the liquid substance such as liquid refrigerant and lubricating oil falling to the bottom of the containing cavity 1013 during the gas-liquid separation process can be attracted into the upper cavity 101311, thereby reducing the superheat degree of the compressor suction.

[0136] In the embodiment, the communication port of the flow guide pipe 17 with the lower part of the first cavity 10131 is the second outlet 10122 shown in Figure 9 The second outlet 10122 is located on the bottom wall of the lower shell 1012, and the communication port of the flow guide pipe 17 with the upper cavity 101311 is the first inlet 10111 in Figure 1 , which is arranged close to the second inlet 10121 on the upper shell 1011 as described above, so as to improve the gas-liquid separation effect.

[0137] It should be understood that when the first inlet 10111 and the second inlet 10121 are both arranged on the upper shell 1011, the first inlet 10111 can be arranged at other positions facilitating communication with the upper cavity 101311 in addition to being arranged close to the second inlet 10121.

[0138] In another preferred embodiment, the first cavity 10131 is provided with a filter part 106 at the communication port of the flow guide pipe 17 with the first cavity 10131. Preferably, the filter part 106 can adopt an existing filter screen, so as to prevent impurities from entering the flow guide pipe 17 through the second outlet 10122, thereby preventing the impurities from flowing in the heat pump air conditioning system described below and preventing the expansion valves mentioned below from being blocked.

[0139] The gas-liquid separator 1 as above, the first cavity 10131 is divided into two layers, when heating, the refrigerant converges at the first inlet 10111 of the upper layer structure, flows through the upper cavity 101311 and the lower cavity 101312, and flows out of the gas-liquid separator 1 through the first outlet 10112 after passing through the second partition 103, and when cooling, the refrigerant flows through the lower cavity 101312 through the second inlet 10121, and flows out of the gas-liquid separator 1 through the first outlet 10112 after passing through the second partition 103, so that the partition function of the gas-liquid separator 1 can be realized.

[0140] In a preferred embodiment, a first support and a second support not shown in the figure can also be provided on the outer wall of the shell 101 to facilitate the installation of the gas-liquid separator 1. In a preferred embodiment, the first support and the second support each include an arc-shaped plate attached to the outer wall of the shell, and a mounting plate connected to one side of the arc-shaped plate, each mounting plate is provided with a mounting hole, and a damping pad is arranged at each mounting hole, which can improve the damping effect of the installed gas-liquid separator 1.

[0141] The gas-liquid separator 1 of the present embodiment is applied to a heat pump management system, and the two flow paths can be used for heating and cooling functions respectively. When heating is required, the refrigerant flow resistance can be increased, the airflow velocity in the compressor 2 can be reduced, and the gas-liquid separation can be facilitated, the flow noise of the fluid such as refrigerant can be reduced, and the overall vehicle NVH (Noise, Vibration, Harshness) performance can be improved. When cooling is required, the refrigerant flow resistance can be reduced, and the gas-liquid separation can be facilitated, and the cooling performance can be improved.

[0142] In order to better understand the gas-liquid separator assembly of the present embodiment, the following will be described with reference to Figures 11 to 13 The overall structure mainly includes a refrigeration circuit and a heat exchange pipeline 7. It should be noted that the upstream and downstream mentioned in the present embodiment are relative to the flow direction of the refrigerant in the refrigeration circuit.

[0143] The refrigeration circuit includes a pipeline, and a compressor 2, a condenser 3, a first expansion valve 4, an evaporator 5, and the aforementioned gas-liquid separator 1 connected in series through the pipeline. One end of the heat exchange pipeline 7 is connected to the pipeline, and the connection position is located upstream of the first expansion valve 4. The other end of the heat exchange pipeline 7 is connected to the first inlet 10111 of the gas-liquid separator 1, and the heat exchange pipeline 7 is provided with a heat exchange part 6 for heat exchange with a battery pack.

[0144] In a preferred embodiment, the aforementioned heat exchange part 6 is a battery pack cooler that can cool the battery, which is suitable for use in new energy vehicles.

[0145] When the gas-liquid separator assembly as above is applied to a heat pump air conditioning system, the evaporator 5 is connected to the second inlet 10121 of the gas-liquid separator 1 downstream, and the inlet of the compressor 2 is connected to the first outlet 10112 of the gas-liquid separator 1.

[0146] In a preferred embodiment, a first temperature sensor 12 and a first pressure sensor 10 are arranged in sequence downstream of the condenser 3, a second pressure sensor 11 and a second temperature sensor 13 are arranged in sequence upstream of the compressor 2, and a third temperature sensor 14 is arranged downstream of the compressor 2. Each of the temperature sensors and pressure sensors mentioned herein can adopt the structure of the prior art.

[0147] As a preferred embodiment, the heat pump air conditioning system as above further comprises a communication pipeline 15 provided with an electronic expansion valve, one end of the communication pipeline 15 being connected to the downstream of the compressor 2, and the other end being in communication with the upper cavity 101311 of the gas-liquid separator 1. The pipeline connecting the communication pipeline 15 and the gas-liquid separator 1 is the aforementioned gas inlet pipeline 18.

[0148] In this embodiment, the communication port of the communication pipeline 15 and the upper cavity 101311 is preferably the first inlet 10111 of the gas-liquid separator 1. It should be understood that, in addition to this, the communication port of the communication pipeline 15 and the upper cavity 101311 can also be arranged at other positions which are convenient for communication with the upper cavity 101311.

[0149] In a preferred embodiment, a second expansion valve 8 is arranged on the heat exchange pipeline 7, and the second expansion valve 8 is arranged upstream of the heat exchange part 6, and a third expansion valve 9 is arranged on the communication pipeline 15. In addition, a one-way valve 16 is arranged downstream of the evaporator 5, so that the refrigerant flowing through the evaporator 5 can only flow to the gas-liquid separator 1 in one direction.

[0150] It should be noted that each of the expansion valves mentioned in this embodiment preferably adopts an existing electronic expansion valve.

[0151] When the heat pump air conditioning system as above is in a heating condition, the flow path of the refrigerant can be referred to the thick solid line shown in Figure 13 , and the refrigerant does not pass through the evaporator 5. When the heat pump air conditioning system as above is in a cooling condition, the flow path of the refrigerant can be referred to the thick solid line shown in Figure 12 , and the refrigerant does not pass through the heat exchange pipeline 7 and the communication pipeline 15.

[0152] When the second inlet 10121 is arranged on the lower shell 1012 of the gas-liquid separator assembly of this embodiment, the gas-liquid separator assembly is applied to a heat pump management system, and when the heating and cooling requirements are different, the gas-liquid mixture can flow through different cavities, which is conducive to the excellent performance of the gas-liquid separator 1.

[0153] Finally, it needs to be explained that the above description is an example of setting the second inlet 10121 on both the upper shell 1011 and the lower shell 1012, in addition to this, the second inlet 10121 can be set only on the upper shell 1011 or only on the lower shell 1012. When applied to the heat pump air conditioner management system, the downstream of the evaporator 5 and the downstream of the heat exchange part 6 can be communicated to the same second inlet 10121.

[0154] Embodiment two

[0155] This embodiment also relates to a vehicle, which has a gas-liquid separator assembly as in embodiment one in the heat pump management of the vehicle, which has the same beneficial effects as the gas-liquid separator assembly in embodiment one relative to the prior art, can simplify the pipeline structure, reduce the cost, and at the same time can effectively reduce the superheat of the compressor suction, when the second inlet 10121 is set on the lower shell 1012, it also makes the vehicle have better NVH performance in the heating process and better refrigeration performance in the refrigeration process.

[0156] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A gas-liquid separator assembly, characterized in that: comprising a gas-liquid separator (1), and a communication member (19) having a first flow channel (1901) and a second flow channel (1902); one end of the first flow channel (1901) is communicated with a first inlet (10111) of the gas-liquid separator (1) through a gas inlet pipe (18), and the other end of the first flow channel (1901) is used for being communicated with a bypass valve on a compressor exhaust pipeline; one end of the second flow channel (1902) is communicated with the first flow channel (1901), and the other end is communicated with the bottom of the gas-liquid separator (1) through a drainage pipe (17); and at least at the connection part of the first flow channel (1901) and the second flow channel (1902), the cross-sectional area of the first flow channel (1901) is greater than that of the second flow channel (1902); in the process of gas-liquid mixture flowing into the gas-liquid separator (1) through the first flow channel (1901) and the gas inlet pipe (18), the liquid substance at the bottom of the gas-liquid separator (1) can enter the gas-liquid separator (1) through the drainage pipe (17), the communication member (19) and the gas inlet pipe (18).

2. The gas-liquid separator assembly according to claim 1, characterized in that: the first flow channel (1901) has a first communication section (19011) and a second communication section (19012), and the cross-sectional area of the first communication section (19011) is smaller than that of the second communication section (19012); one end of the first communication section (19011) and the second communication section (19012) is communicated, the other end of the first communication section (19011) is communicated with the bypass valve, and the other end of the second communication section (19012) is communicated with the gas inlet pipe (18).

3. The gas-liquid separator assembly according to claim 2, characterized in that: the cross-sectional area of the second flow channel (1902) is smaller than that of the first communication section (19011); and the second flow channel (1902) is communicated with the first communication section (19011), or the second flow channel (1902) is communicated with the second communication section (19012).

4. The gas-liquid separator assembly according to claim 3, characterized in that: the cross-sectional area of the gas inlet pipe (18) is smaller than that of the first communication section (19011), and the cross-sectional area of the gas inlet pipe (18) is greater than that of the second communication section (19012); and / or, the cross-sectional area of the drainage pipe (17) is greater than that of the second flow channel (1902).

5. The gas-liquid separator assembly according to claim 3, characterized in that: the drainage pipe (17) has a curved section with a middle part protruding upward, and the highest point of the curved section is higher than the connection part of the drainage pipe (17) and the second flow channel (1902); and / or, the communication member (19) is provided with a mounting part for mounting the bypass valve. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. The gas-liquid separator assembly according to any one of claims 1-5, characterized in that: the gas-liquid separator (1) comprises a housing (101) having a receiving cavity (1013), and a first partition (1021) and a second partition (1022) arranged in the receiving cavity (1013); the first partition (1021) extends along the height direction of the receiving cavity (1013) and divides the receiving cavity (1013) into a first cavity (10131) and a second cavity (10132) on both sides of the first partition (1021); the second partition (1022) is arranged in the first cavity (10131) and divides the first cavity (10131) into an upper cavity (101311) and a lower cavity (101312) on both sides of the second partition (1022); the upper cavity (101311) and the lower cavity (101312) are in communication, and the lower cavity (101312) is in communication with the second cavity (10132); the housing (101) is provided with a first inlet (10111) in communication with the upper cavity (101311) and the gas inlet pipe (18), and a first outlet (10112) in communication with the second cavity (10132); the housing (101) is provided with a second inlet (10121) capable of communicating the upper cavity (101311) with the evaporator (5), and / or the housing (101) is provided with a second inlet (10121) capable of communicating the lower cavity (101312) with the evaporator (5).

7. The gas-liquid separator assembly according to claim 6, characterized in that: further comprising a second partition (103) arranged in the second cavity (10132); the second partition (103) is provided with a third flow channel (1031) and a fourth flow channel (1032) extending along the height direction of the receiving cavity (1013); the upper part of the third flow channel (1031) is in communication with the second cavity (10132), the upper part of the fourth flow channel (1032) is in communication with the first outlet (10112), and the lower parts of the third flow channel (1031) and the fourth flow channel (1032) are in communication.

8. The gas-liquid separator assembly according to claim 7, characterized in that: the bottom of the second partition (103) is provided with a communication cavity (1033); the side wall of the communication cavity (1033) is provided with a third communication part (10332) in communication with the second cavity (10132), and the top wall of the communication cavity (1033) is provided with a communication hole (10331) in communication with the fourth flow channel (1032).

9. The gas-liquid separator assembly according to claim 6, characterized in that: The upper cavity (101311) is provided with a first flow guide part for guiding the fluid entering the upper cavity (101311) from the first inlet (10111) to bend and flow to the communication part of the upper cavity (101311) and the lower cavity (101312); and / or, The lower cavity (101312) is provided with a plurality of partition plates (105) for separating the lower cavity (101312) into a plurality of sub-cavities, and each of the partition plates (105) is provided with a communication port for communicating the sub-cavities on both sides of the partition plate (105).

10. A vehicle, characterized in that: The vehicle is provided with the gas-liquid separator assembly according to any one of claims 1-9 in a heat pump air conditioning system of the vehicle.

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