Gas-liquid separator, heat pump air conditioning system and vehicle

Abstract

The utility model provides a gas-liquid separator, a heat pump air conditioning system and a vehicle, and relates to the technical field of vehicle parts, and the gas-liquid separator comprises a shell, a first partition plate and a second partition plate; the first partition plate divides the containing cavity into a first cavity body and a second cavity body, and the second partition plate is arranged in the first cavity body and divides the first cavity body into an upper cavity body and a lower cavity body. The first partition plate is provided with a communicating part of the lower cavity and the second cavity, the second partition plate is provided with a communicating part of the upper cavity and the lower cavity, and the shell is provided with a first inlet communicating with the upper cavity, a second inlet communicating with the lower cavity and a first outlet communicating with the second cavity. According to the gas-liquid separator disclosed by the utility model, a gas-liquid mixture can enter from the first inlet or the second inlet and flow through different cavities, so that the gas-liquid separator can be applied to heat pump management systems with different functional requirements, and the gas-liquid separator can exert excellent performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle parts technical field, especially a kind of gas-liquid separator. Meanwhile, the utility model also relates to the heat pump air conditioning system of application this gas-liquid separator, and the vehicle of application this heat pump air conditioning system. BACKGROUND

[0002] With the progress of science and technology and the rapid development of vehicles, heat pump air conditioning system has become a commonly used system on new energy vehicles, which is particularly important in energy saving and emission reduction.

[0003] Gas-liquid separator is an 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, and also can carry out gas-liquid separation of gas-liquid two-phase mixed refrigerant, prevent liquid refrigerant from flowing into compressor, so as to prevent "liquid strike" of compressor, and benefit to ensure the reliability of compressor operation.

[0004] The existing gas-liquid separator, its shell is usually provided with inlet for gas-liquid mixture to enter and outlet for gas to flow out after gas-liquid separation, and gas-liquid separation is realized in the process of gas-liquid mixture flowing from inlet to outlet.

[0005] However, when the existing gas-liquid separator is applied to heat pump air conditioning system with heating and cooling function requirement, in the cooling process, refrigerant circulation anomaly is easy to occur, which affects the use of air conditioning cooling function. CONTENT OF UTILITY MODEL

[0006] Therefore, the utility model aims at providing a gas-liquid separator which can be applied to heat pump air conditioning system with heating and cooling function requirement and can play better performance.

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

[0008] A gas-liquid separator, comprising a shell with a containing cavity, a first partition plate and a second partition plate arranged in the containing cavity;

[0009] The first partition plate extends along the height direction of the containing cavity, and divides the containing cavity into a first cavity and a second cavity located on both sides of the first partition plate;

[0010] The second partition plate is arranged in the first cavity and divides the first cavity into an upper cavity and a lower cavity located on the upper side and the lower side of the second partition plate; the upper cavity and the lower cavity are communicated, and the lower cavity is communicated with the second cavity;

[0011] The shell is provided with a first inlet communicated with the upper cavity, a second inlet communicated with the lower cavity, and a first outlet communicated with the second cavity.

[0012] Further, a second partition is arranged in the second cavity.

[0013] The second partition is provided with a first flow channel and a second flow channel extending along the height direction of the accommodating cavity, the upper part of the first flow channel is communicated with the second cavity, the upper part of the second flow channel is communicated with the first outlet, and the lower parts of the first flow channel and the second flow channel are communicated.

[0014] Further, the bottom of the second partition is provided with a communication cavity, the side wall of the communication cavity is provided with a third communication part for communicating the communication cavity with the second cavity, and the top wall of the communication cavity is provided with a communication hole communicated with the second flow channel.

[0015] Further, the upper cavity is provided with a first flow guide part for guiding the fluid in the upper cavity to flow from the first inlet to the communication part between the upper cavity and the lower cavity.

[0016] Further, the first flow guide part comprises a plurality of first flow guide plates, and the first flow guide plates are staggered arranged in the flow direction of the fluid from the first inlet to the communication part between the upper cavity and the lower cavity.

[0017] Further, the lower cavity is provided with a plurality of partition plates, the partition plates divide the lower cavity into a plurality of sub-cavities, and the partition plates are provided with a communication port communicated with the sub-cavities on both sides of the partition plates; and / or, the lower cavity is provided with a second flow guide part for guiding the fluid in the lower cavity to flow from the second inlet to the communication part between the lower cavity and the second cavity.

[0018] Further, the shell is provided with a drainage tube communicated with the lower part of the first cavity and the upper cavity; the lower parts of the first cavity and the second cavity are communicated; and / or, the first cavity is provided with a filter part arranged at the communication part between the drainage tube and the first cavity.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The gas-liquid separator, through the first partition plate and the second partition plate, divides the cavity into the first cavity and the second cavity, and divides the first cavity into the upper cavity and the lower cavity, and simultaneously sets two inlets and one outlet, the fluid such as the gas-liquid mixture entering from the first inlet can flow out from the first outlet through the upper cavity, the lower cavity and the second cavity in sequence, and 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 and flows out from the first outlet.

[0021] The gas-liquid separator is applied to a heat pump management system, and the two flow paths can be used in heating and refrigeration functions respectively, when heating is required, the refrigerant flow resistance can be increased, the airflow flow rate in the compressor is reduced, the gas-liquid separation is facilitated, the flow sound of the fluid such as the refrigerant is reduced, and the NVH (Noise, Vibration, Harshness) performance of the whole vehicle is improved, and when refrigeration is required, the refrigerant flow resistance can be reduced, and the gas-liquid separation is facilitated, and the refrigeration performance can be improved.

[0022] In addition, the second partition piece is provided, the first flow channel and the second flow channel are arranged in the second partition piece, the gas-liquid mixture entering the second cavity can enter the first flow channel from the upper part of the first flow channel, flow downward, enter the second flow channel from the lower part of the first flow channel, flow upward and flow out from the first outlet, and the gas-liquid separation effect is improved.

[0023] The communication cavity is arranged at the lower part of the second partition piece, the liquid refrigerant and the lubricating oil in the gas-liquid mixture can be separated from the gas in the process of flowing through the first flow channel and the second flow channel, under the suction of the compressor, the liquid substances such as the liquid refrigerant and the lubricating oil in the communication cavity can flow upward to the second flow channel through the communication hole, the liquid refrigerant can be rapidly gasified, and the lubricating oil enters the compressor.

[0024] In addition, the first flow guide part is arranged in the upper cavity, the fluid flows to the communication part of the upper cavity and the lower cavity from the first inlet in a bending mode, the fluid flow path is prolonged, and the gas-liquid separation effect is further improved. A plurality of first flow guide plates are arranged and the arrangement mode of the first flow guide plates is limited, the contact probability of the fluid and the first flow guide plates is increased, the refrigerant flow resistance is increased, the refrigerant flow rate is reduced, the gas-liquid separation effect is improved, and the flow sound of the refrigerant is reduced.

[0025] Furthermore, the partition plate or the second flow guide part is arranged, the contact probability of the fluid and the partition plate or the second flow guide part is increased, the refrigerant flow resistance is increased, the refrigerant flow rate is reduced, and the gas-liquid separation effect is further improved.

[0026] And the drainage tube is arranged, the lower part of the first cavity and the upper cavity are communicated, so that the liquid material such as liquid refrigerant and lubricating oil falling into the bottom of the containing cavity in the gas-liquid separation process can be attracted into the upper cavity, and the overheating degree of the compressor suction is reduced.

[0027] Another purpose of the utility model lies in providing a heat pump air conditioning system, including refrigeration circuit, the refrigeration circuit includes pipeline, and the compressor, condenser, first expansion valve, evaporator and gas-liquid separator as described above are connected in series through pipeline;

[0028] Still include the heat exchange pipeline with the second expansion valve, one end of the heat exchange pipeline with the upstream communication of first expansion valve, the other end with the first import communication, and the heat exchange pipeline is equipped with the heat exchange part for and battery pack carries out heat exchange;

[0029] The downstream of the evaporator is communicated with the second import, and the import of the compressor is communicated with the first export.

[0030] Further, the communication pipeline with the electronic expansion valve is further included, one end of the communication pipeline is communicated with the downstream of the compressor, and the other end is communicated with the upper cavity of the gas-liquid separator.

[0031] The heat pump air conditioning system, by the application as above gas-liquid separator, when heating and refrigeration demand are different, gas-liquid mixture can flow through different cavities, and the excellent performance of the gas-liquid separator is facilitated.

[0032] Meanwhile, another purpose of the utility model lies in providing a vehicle, the heat pump air conditioning system as described above is arranged on the vehicle, so that the vehicle has better NVH performance during heating process and better refrigeration performance during refrigeration process. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings that constitute a part of the utility model are used to provide further understanding on the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation on the utility model.In the drawings:

[0034] Figure 1 It is the structural schematic diagram of the gas-liquid separator of the utility model embodiment one;

[0035] Figure 2 It is Figure 1 The schematic diagram of the structure shown in the figure is not assembled shell and first support and second support;

[0036] Figure 3 It is Figure 2 The schematic diagram of the structure shown in the figure is not assembled shell and first support and second support;

[0037] Figure 4 This is a schematic diagram of the lower shell structure according to Embodiment 1 of this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the second separator described in Embodiment 1 of this utility model;

[0039] Figure 6 For along Figure 5 Sectional view of line AA in the middle;

[0040] Figure 7 This is a schematic diagram of the heat pump management system described in Embodiment 2 of this utility model;

[0041] Figure 8 for Figure 7 The diagram shown illustrates the principle of the structure under heating conditions.

[0042] Figure 9 for Figure 7 The diagram shows the principle block diagram of the structure under refrigeration conditions.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Gas-liquid separator; 2. Compressor; 3. Condenser; 4. First expansion valve; 5. Evaporator; 6. Heat exchange section; 7. Heat exchange piping; 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. Connecting pipe; 16. Check valve; 17. Drainage pipe;

[0045] 101. Housing; 102. First partition; 103. Second partition; 104. First guide plate; 105. Partition plate; 106. Filter section; 107. First bracket; 108. Second bracket; 109. Vibration damping pad;

[0046] 1011. Upper shell; 1012. Lower shell; 1013. Receiving cavity;

[0047] 10111, First Import; 10112, First Export; 10113, Third Import;

[0048] 10121. Second import; 10122. Second export; 10123. Protrusion;

[0049] 10131, First cavity; 10132, Second cavity;

[0050] 101311, Upper cavity; 101312, Lower cavity;

[0051] 1021. First partition; 1022. Second partition;

[0052] 10212, a communication position of the lower cavity and the second cavity; 10221, a communication position of the upper cavity and the lower cavity; 10222, a liquid falling hole;

[0053] 1031, a first flow channel; 1032, a second flow channel; 1033, a communication cavity;

[0054] 10331, a communication hole; 10332, a third communication part;

[0055] 1051, a first communication port; 1052, a second communication port. DETAILED DESCRIPTION

[0056] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0057] In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms 'upper', 'lower' and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms 'first','second' are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0058] In addition, in the embodiments of the utility model, in the description of the utility model, unless otherwise explicitly limited, the terms'mounting', 'connection', 'connecting', 'connecting piece' should be understood broadly. For example, it can be fixedly connected, or can be detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an 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.

[0059] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0060] Embodiment one

[0061] The embodiment relates to a gas-liquid separator, which, by improving the structure and the number of inlets, can make the gas-liquid mixture flow through different cavities when applied in a heat pump air conditioning system, so that the heat pump air conditioning system can realize excellent heating and refrigeration functions.

[0062] Based on the above design idea, an exemplary structure of the gas-liquid separator 1 of the embodiment is as shown in the figure. Figures 1 to 3As shown, in the overall structure, the gas-liquid separator 1 of the embodiment includes a housing 101 with a containing cavity 1013, and a first partition 102 arranged in the containing cavity 1013, the first partition 102 including a first partition plate 1021, and a second partition plate 1022 arranged on one side of the first partition plate 1021.

[0063] In the specific structure, 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 arranged 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 arranged on both sides of the second partition plate 1022.

[0064] 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, 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, and 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.

[0065] 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.

[0066] In order to better understand the gas-liquid separator 1 of the embodiment, first refer to Figure 1 and in combination with Figure 4The structure of the shell 101 is described, preferably, the shell 101 includes the upper shell 1011 and the 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 to be described below are fixedly installed in the accommodating cavity 1013.

[0067] In the preferred embodiment, the shape of the accommodating cavity 1013 is cylindrical, and the axial direction is the height direction of the gas-liquid separator 1. The aforementioned first partition 1021, in the preferred embodiment, has a "U" shaped cross section, 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 to the second cavity 10132, thereby facilitating the guarantee of the gas-liquid separation effect.

[0068] 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" shaped, such as rectangular, S-shaped, circular ring-shaped, etc.

[0069] The shape of the second partition 1022 is consistent with the cross-sectional shape of the first cavity 10131, which is arranged orthogonally to the height direction of the gas-liquid separator 1, and 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 is also convenient for arranging the flow guide structure, thereby facilitating the improvement of the gas-liquid separation effect.

[0070] 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 one end of the first partition 1021, specifically, the first communication part includes a plurality of openings formed on the first partition 1021, and preferably, the upper openings are a plurality of openings with smaller communication area, which are circular, and the lower opening is one opening with larger communication area, which is square, so that the plurality of upper openings can have a better flow equalization effect, and the lower opening has smaller resistance.

[0071] 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, and it should be understood that the first communication part can be arranged according to actual needs in addition to the opening shape and number as above.

[0072] In a 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 one end of the upper cavity 101311, which is conducive to 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.

[0073] 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 first flow channel 1031 and a second flow channel 1032 extending along the height direction of the containing cavity 1013. The upper part of the first flow channel 1031 communicates with the second cavity 10132, the upper part of the second flow channel 1032 communicates with the first outlet 10112, and the lower parts of the first flow channel 1031 and the second flow channel 1032 communicate with each other.

[0074] By arranging the second partition 103, the fluid such as gas-liquid mixture entering the second cavity 10132 can flow upwards and enter the first flow channel 1031 from the upper part of the first flow channel 1031, flow downwards in the first flow channel 1031, and flow into the second flow channel 1032 from the lower part of the first flow channel 1031 and the second flow channel 1032. The fluid flows upwards in the second flow channel 1032 and flows out of the first outlet 10112. During the flow process, the fluid collides with the side of the first partition 102 facing the second cavity 10132 and the second partition 103, thereby completing gas-liquid separation and improving the effect of gas-liquid separation.

[0075] In a preferred embodiment, the cross section of the first flow channel 1031 is in the shape of "U", the opening of which faces the second flow channel 1032, and the cross section of the second flow channel 1032 is in the shape of a circle. The bottom of the first flow channel 1031 and the second flow channel 1032 is provided with a baffle plate, and the lower parts of the first flow channel 1031 and the second flow channel 1032 are communicated through the openings on the partition plate therebetween, so that the shape of the flow channel in the second partition 103 is in the shape of "U" with the opening facing upwards.

[0076] It should be noted that the cross section of the first flow channel 1031 can also be in other shapes, such as a circle, a square, a rhombus, etc., and the cross section of the second flow channel 1032 can also be in other shapes, such as a "U" shape, a square, a rhombus, etc.

[0077] The bottom of the second partition 103 is provided with a communication cavity 1033, the communication cavity 1033 and the first flow channel 1031 are separated by the aforementioned blocking plate, and the communication cavity 1033 and the second flow channel 1032 are also separated by the aforementioned blocking plate, the sidewall of the communication cavity 1033 is provided with a third communication part 10332 for communicating the communication cavity 1033 with the second cavity 10132, and the top wall of the communication cavity 1033, that is, the blocking plate is provided with a communication hole 10331 for communicating with the second flow channel 1032.

[0078] In the embodiment, the communication cavity 1033 is arranged at the lower part of the second partition 103, and the liquid refrigerant and the lubricating oil in the gas-liquid mixture can be separated from the gas during the circulation in the first flow channel 1031 and the second flow channel 1032, under the suction of the compressor 2, the liquid substance such as the liquid refrigerant and the lubricating oil in the communication cavity 1033 can flow from the communication hole 10331 to the second flow channel 1032 to be rapidly gasified, and enter the compressor 2 together with the lubricating oil.

[0079] Specifically, as shown in Figure 2 The number of the aforementioned third communication parts 10332 is multiple, and the adjacent third communication parts 10332 are separated by the connecting columns extending in the up-down direction, which is beneficial to ensure the structural strength of the second partition 103.

[0080] In the preferred embodiment, the second partition 103 adopts an integrally formed structure, which is convenient for installation and arrangement in the shell 101, and it should be understood that the second partition 103 is also feasible to be separately processed and assembled into an integral structure.

[0081] In the preferred embodiment, the lower parts 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 parts of the first cavity 10131 and the second cavity 10132 can flow into the communication cavity 1033.

[0082] As shown in Figure 4 The bottom wall of the accommodating cavity 1013 is provided with a protrusion 10123 protruding into the accommodating cavity 1013, and in the preferred embodiment, the protrusion 10123 is multiple, each protrusion 10123 passes through the center of the bottom wall and extends along the radial direction of the bottom wall, and a gap is arranged between each protrusion 10123 and the sidewall of the accommodating cavity 1013, so that when the first partition 102 and the second partition 103 are installed, the lower parts of the two can abut on the protrusion 10123, so that the lower parts of the first cavity 10131 and the second cavity 10132 are communicated.

[0083] It should be understood that the purpose of the protrusion 10123 is to make the lower parts of the first cavity 10131 and the second cavity 10132 flow, so that the liquid refrigerant and the lubricating oil contained in the lower part of the cavity 1013 can flow between the first cavity 10131 and the second cavity 10132. It should be understood that the lower parts of the first cavity 10131 and the second cavity 10132 can of course also be connected in other ways, such as by providing an opening at the bottom end of the first partition 1021.

[0084] In order to improve the gas-liquid separation effect in the upper cavity 101311, as shown in Figure 2 and Figure 3 , as a preferred embodiment, the first inlet 10111 and the second communication part (the communication part 10221 of the upper cavity 101311 and the lower cavity 101312) are arranged near the two ends of the upper cavity 101311, which is beneficial to prolong the flow path of the fluid such as gas-liquid mixture, so as to improve 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.

[0085] In a further preferred embodiment, as shown in Figure 2 and Figure 3 , the first flow guide part is provided in the upper cavity 101311, and the first flow guide part is used to guide the fluid entering the upper cavity 101311 from the first inlet 10111 to bend towards the communication part 10221 of the upper cavity 101311 and the lower cavity 101312.

[0086] Here, by providing the first flow guide part in the upper cavity 101311, the fluid can be guided to bend towards the communication part 10221 of the upper cavity 101311 and the lower cavity 101312 from the first inlet 10111, and the flow path of the fluid can be prolonged. During the flow of the fluid, such as liquid refrigerant (refrigerant), lubricating oil and other refrigerants, the fluid will collide and rub with the inner wall of the upper cavity 101311, resulting in gas-liquid separation. The heavier liquid components such as liquid refrigerant and lubricating oil will deposit at the bottom of the upper cavity 101311, and the lighter gas components will continue to flow, which can further improve the gas-liquid separation effect.

[0087] It should be noted that the second partition 1022 is also provided with a liquid falling hole 10222 for communication between 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.

[0088] Still referring to Figure 2 and Figure 3As shown, in the specific implementation, the first flow guide portion includes a plurality of first flow guide plates 104, which are arranged staggeredly in the flow direction of the fluid from the first inlet 10111 to the communication part 10221 of the upper cavity 101311 and the lower cavity 101312.

[0089] As in the present embodiment, the plurality of first flow guide plates 104 are arranged at intervals in the flow direction of the fluid from the first inlet 10111 to the communication part 10221 of the upper cavity 101311 and the lower cavity 101312, and the plurality of first flow guide plates 104 are arranged alternately on both sides of the flow direction of the fluid in the upper cavity 101311.

[0090] 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 flow resistance of the refrigerant, and reduce the flow rate of the refrigerant, thereby facilitating to improve the gas-liquid separation effect.

[0091] In the 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 flow path of the fluid and facilitate to increase the collision probability with the fluid. It should be understood that the first flow guide portion can be arranged in other structures in addition to the plurality of first flow guide plates 104, for example, 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.

[0092] 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 of the lower cavity 101312 and the second cavity) are arranged close to both ends of the lower cavity 101312, which also lengthens the flow path of the fluid in the lower cavity 101312, thereby improving 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.

[0093] In the preferred embodiment, a plurality of partition plates 105 are arranged in the lower cavity 101312, and the plurality of partition plates 105 divide the lower cavity 101312 into a plurality of sub-cavities. Specifically, each partition plate 105 is fixed to one side of the first partition piece 102 and is attached to the side wall of the containing cavity 1013 on the other side, and the plurality of partition plates 105 are arranged at intervals 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 communicated in sequence.

[0094] As in the present embodiment, the partition plates 105 are three, and the lower cavity 101312 is divided into four sub-chambers, and the communication openings on each partition plate 105 are preferably provided in multiple to achieve better flow distribution. As in the present embodiment, the communication openings on each partition plate 105 include a plurality of first communication openings 1051 provided on the partition plate 105, and a gap provided at one end of the partition plate 105, which cooperates with the inner wall of the accommodating cavity 1013 to form a second communication opening 1052 at the gap.

[0095] It should be noted that the shapes and numbers of the first communication openings 1051 and the second communication openings 1052 can be set according to actual needs, or can be referred to as shown in Figure 2 and Figure 3 , which will not be described in detail in the present embodiment.

[0096] The aforementioned second inlet 10121 is in communication with the sub-chamber farthest from the first communication part (the communication part 10212 between the lower cavity 101312 and the second cavity 10132), so that the fluid entering the sub-chamber from the second inlet 10121 can pass through the four sub-chambers in turn, and then flow into the second cavity 10132 from the communication part 10212 between the lower cavity 101312 and the second cavity 10132.

[0097] It should be noted that the multiple partition plates 105 provided as above are 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 provided in the lower cavity 101312 for facilitating gas-liquid separation can be other structures in addition to the aforementioned multiple partition plates 105.

[0098] For example, a second flow guide part is provided in the lower cavity 101312, which is used to guide the fluid entering the lower cavity 101312 from the second inlet 10121 to flow towards the communication part 10212 between the lower cavity 101312 and the second cavity 10132 in a curved manner. The structure of the first flow guide part can be referred to above.

[0099] It should be noted that in the present embodiment, the aforementioned 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 integral structure to facilitate installation in the shell 101. In addition, these components can of course be separately processed and assembled into an integral structure.

[0100] 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 not shown in the figure, which connects the lower part of the first cavity 10131 and the upper cavity 101311, so that the liquid substances 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, reducing the superheat of the compressor suction.

[0101] As in the present embodiment, the communication port of the flow guide pipe 17 with the first cavity 10131 is the second outlet 10122 shown in the figure, which 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 third inlet 1011310113 in the figure, which is arranged close to the first inlet 10111 described above to facilitate the gas-liquid separation effect. It should be understood that the third inlet 10113 can be arranged at other positions that facilitate communication with the upper cavity 101311 in addition to being arranged close to the first inlet 10111. Figure 1 Figure 1 As in the present embodiment, the communication port of the flow guide pipe 17 with the first cavity 10131 is the second outlet 10122 shown in the figure, which 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 third inlet 1011310113 in the figure, which is arranged close to the first inlet 10111 described above to facilitate the gas-liquid separation effect. It should be understood that the third inlet 10113 can be arranged at other positions that facilitate communication with the upper cavity 101311 in addition to being arranged close to the first inlet 10111.

[0102] In another preferred embodiment, a filter part 106 is arranged in the first cavity 10131 at the communication port of the flow guide pipe 17 with the first cavity 10131, and preferably the filter part 106 can use an existing filter screen, so as to prevent impurities from entering the flow guide pipe 17 through the second outlet 10122, thereby preventing impurities from flowing in the heat pump air conditioning system described below and preventing the expansion valves mentioned below from being blocked.

[0103] As in the above gas-liquid separator 1, the first cavity 10131 is divided into upper and lower layers, and during 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 then flows out of the gas-liquid separator 1 through the first outlet 10112 after passing through the second partition 103, and during cooling, the refrigerant flows through the lower cavity 101312 through the second inlet 10121, and then flows out of the gas-liquid separator 1 through the first outlet 10112 after passing through the second partition 103, thereby realizing the partition function of the gas-liquid separator 1.

[0104] In a preferred embodiment, the outer wall of the shell 101 is provided with a first bracket 107 and a second bracket 108 to facilitate the installation of the gas-liquid separator 1. In a preferred embodiment, the first bracket 107 and the second bracket 108 each include an arc-shaped plate attached to the outer wall of the shell 101, and a mounting plate connected to one side of the arc-shaped plate, each mounting plate is provided with a mounting hole, and each mounting hole is provided with a damping pad to improve the damping effect of the gas-liquid separator 1 after installation.

[0105] ​In this embodiment, the gas-liquid separator 1 is applied in a heat pump management system. The two flow paths can be used for heating and cooling functions respectively. When heating is required, it can increase the refrigerant flow resistance, reduce the airflow velocity in the compressor 2, and facilitate rapid gas-liquid separation, thereby reducing the flow noise of fluids such as refrigerant and improving the overall vehicle NVH (Noise, Vibration, Harshness) performance. When cooling is required, it can reduce the refrigerant flow resistance and facilitate rapid gas-liquid separation, thereby improving cooling performance.

[0106] Example 2

[0107] This embodiment relates to a heat pump air conditioning system, such as Figures 7 to 9 As shown, 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 this embodiment refer to the refrigerant flow direction within the refrigeration circuit.

[0108] The refrigeration circuit includes piping, and a compressor 2, a condenser 3, a first expansion valve 4, an evaporator 5, and a gas-liquid separator 1 as described in Embodiment 1, all connected in series via the piping. One end of the heat exchange piping 7 is connected to the piping, with the connection point located upstream of the first expansion valve 4. The other end of the heat exchange piping 7 is connected to the first inlet 10111 of the gas-liquid separator 1, and the heat exchange piping 7 is provided with a heat exchange section 6 for exchanging heat with the battery pack.

[0109] In a preferred embodiment, the aforementioned heat exchange section 6 is a battery pack cooler that can cool the battery and is suitable for use in new energy vehicles.

[0110] In this embodiment of the heat pump air conditioning system, when the gas-liquid separator 1 as in Embodiment 1 is used, the downstream of the evaporator 5 is connected to the second inlet 10121 of the gas-liquid separator 1, and the inlet of the compressor 2 is connected to the first outlet 10112 of the gas-liquid separator 1.

[0111] In a preferred embodiment, a first temperature sensor 12 and a first pressure sensor 10 are sequentially arranged downstream of the condenser 3, while a second pressure sensor 11 and a second temperature sensor 13 are sequentially arranged upstream of the compressor 2, and a third temperature sensor 14 is arranged downstream of the compressor 2. All temperature and pressure sensors mentioned herein employ structures found in the prior art.

[0112] As a preferred embodiment, the heat pump air conditioning system of this embodiment also includes a connecting pipe 15 equipped with an electronic expansion valve. One end of the connecting pipe 15 is connected to the downstream of the compressor 2, and the other end is connected to the upper cavity 101311 of the gas-liquid separator 1.

[0113] As in the embodiment, the communication port of the communication pipeline 15 and the upper cavity 101311 is preferably the third inlet 10113 of the gas-liquid separator 1. It should be understood that, in addition, the communication port of the communication pipeline 15 and the upper cavity 101311 can also be provided at other positions convenient for the communication of the upper cavity 101311.

[0114] In the preferred embodiment, the heat exchange pipeline 7 is provided with a second expansion valve 8, and the second expansion valve 8 is located upstream of the heat exchange part 6, and the communication pipeline 15 is provided with a third expansion valve 9. In addition, a one-way valve 16 is provided downstream of the evaporator 5, so that the refrigerant flowing through the evaporator 5 can only flow in one direction to the gas-liquid separator 1.

[0115] It should be noted that the expansion valves mentioned in the embodiment are preferably existing electronic expansion valves.

[0116] The heat pump air conditioning system as above in the heating condition, the flow path of the refrigerant can be referred to as shown in the thick solid line in Figure 8 , and the refrigerant does not pass through the evaporator 5. The heat pump air conditioning system as above in the cooling condition, the flow path of the refrigerant can be referred to as shown in the thick solid line in Figure 9 , and the refrigerant does not pass through the heat exchange pipeline 7 and the communication pipeline 15.

[0117] The heat pump air conditioning system of the embodiment, by applying the gas-liquid separator 1 as in the first embodiment, has the same beneficial effects as the gas-liquid separator 1 of the first embodiment relative to the prior art. When the heating and cooling requirements are different, the gas-liquid mixture can flow through different cavities, which is beneficial to the excellent performance of the gas-liquid separator 1.

[0118] At the same time, the embodiment also relates to a vehicle provided with the heat pump air conditioning system as in the first embodiment, which has the same beneficial effects as the heat pump air conditioning system as above relative to the prior art, and also has better NVH performance during vehicle heating and better cooling performance during cooling.

[0119] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. 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, characterized in that: comprising a housing (101) with a containing cavity (1013), and a first partition (1021) and a second partition (1022) arranged in the containing cavity (1013); the first partition (1021) extends along the height direction of the containing cavity (1013), and separates the containing cavity (1013) into a first cavity (10131) and a second cavity (10132) located on both sides of the first partition (1021); the second partition (1022) is arranged in the first cavity (10131), and separates the first cavity (10131) into an upper cavity (101311) and a lower cavity (101312) located on both sides of the second partition (1022); the upper cavity (101311) and the lower cavity (101312) are communicated, and the lower cavity (101312) is communicated with the second cavity (10132); the housing (101) is provided with a first inlet (10111) communicated with the upper cavity (101311), a second inlet (10121) communicated with the lower cavity (101312), and a first outlet (10112) communicated with the second cavity (10132).

2. The gas-liquid separator according to claim 1, characterized in that: further comprising a second partition (103) arranged in the second cavity (10132); the second partition (103) is provided with a first flow channel (1031) and a second flow channel (1032) extending along the height direction of the containing cavity (1013), the upper part of the first flow channel (1031) is communicated with the second cavity (10132), the upper part of the second flow channel (1032) is communicated with the first outlet (10112), and the lower parts of the first flow channel (1031) and the second flow channel (1032) are communicated.

3. The gas-liquid separator according to claim 2, 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) for communicating the communication cavity (1033) with the second cavity (10132), and the top wall of the communication cavity (1033) is provided with a communication hole (10331) communicated with the second flow channel (1032).

4. The gas-liquid separator according to claim 1, characterized in that: the upper cavity (101311) is provided with a first flow guide part for guiding the fluid in the upper cavity (101311) to flow from the first inlet (10111) to a communication part (10221) between the upper cavity (101311) and the lower cavity (101312) in a curved manner.

5. The gas-liquid separator according to claim 4, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ The first flow guide portion includes a plurality of first flow guide plates (104), and the plurality of first flow guide plates (104) are arranged in a staggered manner in a flow direction of fluid from the first inlet (10111) to a communication site (10221) between the upper cavity (101311) and the lower cavity (101312).

6. The gas-liquid separator according to claim 1, characterized in that: The lower cavity (101312) is provided with a plurality of partition plates (105), the plurality of partition plates (105) divide 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); and / or, the lower cavity (101312) is provided with a second flow guide portion, and the second flow guide portion is used for guiding the fluid in the lower cavity (101312) to bend from the second inlet (10121) to a communication site (10212) between the lower cavity (101312) and the second cavity (10132).

7. The gas-liquid separator according to any one of claims 1-6, characterized in that: The shell (101) is provided with a flow guide pipe (17) for communicating a lower part of the first cavity (10131) with the upper cavity (101311); The lower parts of the first cavity (10131) and the second cavity (10132) are communicated; and / or, the first cavity (10131) is provided with a filter portion (106) located at a communication port between the flow guide pipe (17) and the first cavity (10131).

8. A heat pump air conditioning system, characterized in that: It comprises a refrigeration circuit, the refrigeration circuit comprises a pipeline, and a compressor (2), a condenser (3), a first expansion valve (4), an evaporator (5), and the gas-liquid separator (1) according to any one of claims 1-7 connected in series through the pipeline; It further comprises a heat exchange pipeline (7) provided with a second expansion valve (8), one end of the heat exchange pipeline (7) is communicated with an upstream of the first expansion valve (4), the other end is communicated with the first inlet (10111), and the heat exchange pipeline (7) is provided with a heat exchange portion (6) for heat exchange with a battery pack; A downstream of the evaporator (5) is communicated with the second inlet (10121), and an inlet of the compressor (2) is communicated with the first outlet (10112).

9. The heat pump air conditioning system according to claim 8, characterized in that: It further comprises a communication pipeline (15) provided with an electronic expansion valve, one end of the communication pipeline (15) is communicated with a downstream of the compressor (2), and the other end is communicated with the upper cavity (101311) of the gas-liquid separator (1).

10. A vehicle, characterized in that: The vehicle is provided with the heat pump air conditioning system according to claim 8 or 9.

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