Gas-liquid separator with heat exchange structure

Abstract

The embodiment of the invention provides a gas-liquid separator with a heat exchange structure, and relates to the field of gas-liquid separation. The gas-liquid separator with the heat exchange structure comprises an outer cylinder body, inner cylinder bodies and a heat exchange cylinder, the inner cylinder bodies are arranged in the outer cylinder body at intervals, the heat exchange cylinder is arranged between the outer cylinder body and the inner cylinder bodies, the heat exchange cylinder and the outer cylinder body form a first cavity allowing a cooling medium to circulate, the heat exchange cylinder and the inner cylinder body form a second cavity allowing a refrigerant to circulate, and the first cavity and the second cavity are communicated with each other. The first chamber and the second chamber are not communicated with each other, and the second chamber is communicated with the interior of the inner cylinder; a cooling medium with a low temperature circulates in the first cavity, and after a refrigerant with a high temperature enters the second cavity, a temperature difference with a certain temperature gradient exists between the second cavity on the inner side of the heat exchange cylinder and the first cavity on the outer side of the heat exchange cylinder. Therefore, the cooling medium with the low temperature in the first cavity can conduct heat exchange and cooling on the refrigerant with the high temperature in the second cavity through the heat exchange cylinder, and then the risk of liquid impact of the compressor is reduced.

Description

Technical Field

[0001] The invention relates to the field of gas-liquid separation, and in particular to a gas-liquid separator with a heat exchange structure. Background Art

[0002] In the automotive heat pump system, a gas-liquid separator is installed after the evaporator and before the compressor, which can separate the gas and liquid refrigerants, temporarily store excess refrigerant liquid, protect the compressor, and avoid liquid hammer in the compressor.

[0003] When the temperature of the refrigerant entering the expansion valve is too high, the refrigeration effect will be reduced. However, the commonly used gas-liquid separators do not have the function of cooling the refrigerant, which increases the risk of liquid hammer in the compressor. Summary of the invention

[0004] The invention provides a gas-liquid separator with a heat exchange structure, which solves the problem that the existing gas-liquid separator cannot cool down the high-temperature refrigerant.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the present invention provides a gas-liquid separator with a heat exchange structure, which includes:

[0007] An outer cylinder and an inner cylinder, wherein the inner cylinder is arranged inside the outer cylinder, and a gap is formed between the outer peripheral wall of the inner cylinder and the inner peripheral wall of the outer cylinder;

[0008] A heat exchange tube, wherein the heat exchange tube is arranged between an outer tube body and an inner tube body, a first chamber through which a cooling medium can flow is formed between the heat exchange tube and the outer tube body, a second chamber through which a refrigerant can flow is formed between the heat exchange tube and the inner tube body, the first chamber and the second chamber are not connected to each other, and the second chamber is connected to the interior of the inner tube body, and the first chamber and the interior of the inner tube body are not connected to each other.

[0009] Optionally, the gas-liquid separator further comprises an upper cover, the upper cover is provided with a first flow channel and a second flow channel separated from each other, the first flow channel is communicated with the interior of the inner cylinder, and the second flow channel is communicated with the first chamber.

[0010] Optionally, the gas-liquid separator further comprises a lower cover, the lower cover is provided with a third flow channel and a fourth flow channel separated from each other, the third flow channel is communicated with the first chamber, and the fourth flow channel is communicated with the second chamber.

[0011] Optionally, the heat exchange cylinder includes a cylinder body, an upper ring body and a lower ring body, the hollow interior of the cylinder body penetrates to both ends, the upper ring body is connected to the upper end of the cylinder body, the lower ring body is connected to the lower end of the cylinder body, and the upper ring body and the lower ring body are simultaneously connected to the inner side wall of the outer cylinder body;

[0012] The upper ring body is also connected to an upper pipe, the upper end of the upper pipe is connected to the second flow channel, and the lower end of the upper pipe is connected to the first chamber; the lower ring body is also connected to a lower pipe, the upper end of the lower pipe is connected to the first chamber, and the lower end of the lower pipe is connected to the third flow channel.

[0013] Optionally, both the inner wall and the outer wall of the cylinder body are provided with protrusions or grooves for increasing the contact area between the cooling medium and the refrigerant.

[0014] Optionally, the heat exchange cylinder includes a cylinder body, an outer wall of the cylinder body is provided with an outer flow channel, the beginning and the end of the outer flow channel are respectively a first hole and a second hole, the first hole is connected to the third flow channel, and the second hole is connected to the second flow channel.

[0015] Optionally, the outer flow channel is arranged in a spiral shape, and the convex ridges constituting the outer flow channel are sealed to the inner wall of the outer cylinder.

[0016] Optionally, a plurality of independent inner guide grooves are provided on the inner side wall of the cylinder body, and both ends of each inner guide groove penetrate the upper and lower end surfaces of the cylinder body.

[0017] Optionally, one end of the inner cylinder is open, and the open end is covered with a cover plate, and the cover plate is provided with a connecting channel, the upper end of the connecting channel is connected to the first flow channel, and the lower end of the connecting channel is connected to the interior of the inner cylinder.

[0018] Optionally, the gas-liquid separator further comprises a gas-liquid separation component, which is arranged inside the inner cylinder and is used for separating gas phase and liquid phase in the refrigerant.

[0019] Optionally, the gas-liquid separation component includes an impact plate, which is located at the lower part of the cover plate. The lower end opening of the connecting channel on the cover plate faces the impact plate, and a gap is left between the upper side wall of the impact plate and the lower side wall of the cover plate, and the gap is connected to the interior of the inner cylinder.

[0020] Optionally, the gas-liquid separation component further includes a sleeve, the interior of the sleeve is communicated, one end of the sleeve is communicated with the interior of the inner cylinder, and the other end of the sleeve is communicated with the second chamber.

[0021] Optionally, the sleeve is arranged inside the inner cylinder, and the sleeve comprises an outer tube body and an inner tube body;

[0022] The first end and the second end of the outer tube body are both open, the first end is close to the cover plate, and the second end is far from the cover plate. The first end and the second end are both open, the opening of the first end is connected to the interior of the inner tube body, and the opening of the second end is connected to the inner tube body and the interior of the inner tube body at the same time;

[0023] One side of the inner tube body is connected to the inner side wall of the outer tube body, the lower end of the inner tube body is connected to the second end of the outer tube body, and the upper end of the inner tube body is connected to the second chamber.

[0024] Optionally, a sleeve mounting seat is provided inside the inner cylinder, and the sleeve is connected to the sleeve mounting seat.

[0025] The beneficial effects of the gas-liquid separator with a heat exchange structure according to the embodiment of the present invention include, for example:

[0026] The gas-liquid separator with a heat exchange structure comprises an outer cylinder, an inner cylinder and a heat exchange cylinder, the inner cylinder is arranged inside the outer cylinder, and the outer peripheral wall of the inner cylinder and the inner peripheral wall of the outer cylinder have a gap, the heat exchange cylinder is arranged between the outer cylinder and the inner cylinder, a first chamber for cooling medium to flow is formed between the heat exchange cylinder and the outer cylinder, a second chamber for refrigerant to flow is formed between the heat exchange cylinder and the inner cylinder, the first chamber and the second chamber are not communicated with each other, and the second chamber is communicated with the interior of the inner cylinder, and the first chamber and the interior of the inner cylinder are not communicated with each other; a cooling medium with a lower temperature flows through the first chamber, and when the refrigerant with a higher temperature enters the second chamber, the second chamber inside the heat exchange cylinder and the first chamber outside have a temperature difference with a certain temperature gradient, so that the cooling medium with a lower temperature in the first chamber can exchange heat and cool the refrigerant with a higher temperature in the second chamber through the heat exchange cylinder, thereby reducing the risk of liquid hammer in the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of a gas-liquid separator with a heat exchange structure provided in an embodiment of the present invention;

[0029] Figure 2 It is a front view schematic diagram of a gas-liquid separator with a heat exchange structure provided in an embodiment of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the cross section of AA;

[0031] Figure 4 for Figure 2 Schematic cross-section of the middle BB;

[0032] Figure 5 A schematic top view of a gas-liquid separator with a heat exchange structure provided in an embodiment of the present invention;

[0033] Figure 6 for Figure 5 Schematic cross-section of the CC;

[0034] Figure 7 A diagram showing the positional relationship between the cover plate and the inner cylinder, and between the heat exchange cylinder and the outer cylinder provided in an embodiment of the present invention;

[0035] Figure 8 It is a schematic structural diagram of an inner cylinder provided in an embodiment of the present invention;

[0036] Fig. 9 A schematic diagram showing a structure of an upper cover provided in an embodiment of the present invention from a first perspective;

[0037] Fig.10 A schematic diagram showing a structure of an upper cover provided in an embodiment of the present invention from a second viewing angle;

[0038] Fig.11 A schematic diagram of the structure of a lower cover provided in an embodiment of the present invention;

[0039] Fig.12 It is a schematic structural diagram of a first heat exchange tube provided in an embodiment of the present invention;

[0040] Fig.13 It is a structural schematic diagram of a first type of cylinder body provided in an embodiment of the present invention;

[0041] Fig.14 It is a schematic structural diagram of a second heat exchange tube provided in an embodiment of the present invention;

[0042] Fig.15 This is a schematic diagram of the structure of the second heat exchange cylinder and the outer cylinder provided in an embodiment of the present invention;

[0043] Fig.16 It is a schematic diagram of the structure of the gas-liquid separation component provided in an embodiment of the present invention;

[0044] Fig.17 A schematic diagram of the structure of an impact plate provided in an embodiment of the present invention;

[0045] Fig.18 It is a schematic cross-sectional view of a gas-liquid separation assembly provided in an embodiment of the present invention along the axial direction of the casing;

[0046] Fig.19 It is a schematic structural diagram of a sleeve provided in an embodiment of the present invention;

[0047] Fig. 20 It is a schematic structural diagram of a sleeve mounting base provided in an embodiment of the present invention.

[0048] Icons: 1-upper cover; 10-first interface; 11-second interface; 12-first flow channel; 13-second flow channel; 2-lower cover; 20-third interface; 21-fourth interface; 22-third flow channel; 23-fourth flow channel; 3-outer cylinder; 4-inner cylinder; 40-avoidance area; 41-cover plate; 411-connecting pipe; 5-heat exchange cylinder; 50-cylinder body; 501-protrusion; 502-recessed area; 503- Outer flow channel; 504-inner guide groove; 505-first hole; 506-second hole; 51-upper ring body; 511-upper pipeline; 52-lower ring body; 521-lower pipeline; 6-gas-liquid separation component; 60-impact plate; 61-sleeve; 611-outer tube body; 612-inner tube body; 613-partition plate; 62-sleeve mounting seat; 621-limiting block; 622-through hole; 7-second chamber; 8-first chamber. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0054] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0055] Unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0057] An embodiment of the present invention provides a gas-liquid separator with a heat exchange structure. The gas-liquid separator has the function of exchanging heat and cooling the high-temperature refrigerant, thereby reducing the temperature of the refrigerant when it enters the expansion valve, improving the refrigeration effect, and reducing the risk of liquid hammer in the compressor. The gas-liquid separator will be described in detail below.

[0058] Please refer to Figures 1 to 7 A gas-liquid separator with a heat exchange structure includes an outer cylinder 3, an inner cylinder 4 and a heat exchange cylinder 5; the inner cylinder 4 is arranged inside the outer cylinder 3, and the outer peripheral wall of the inner cylinder 4 and the inner peripheral wall of the outer cylinder 3 have a gap, the heat exchange cylinder 5 is arranged between the outer cylinder 3 and the inner cylinder 4, a first chamber 8 for cooling medium to flow is formed between the heat exchange cylinder 5 and the outer cylinder 3, a second chamber 7 for refrigerant to flow is formed between the heat exchange cylinder 5 and the inner cylinder 4, the first chamber 8 and the second chamber 7 are not communicated with each other, and the second chamber 7 is communicated with the interior of the inner cylinder 4, and the first chamber 8 and the interior of the inner cylinder 4 are not communicated with each other.

[0059] A cooling medium with a lower temperature flows through the first chamber 8. When the refrigerant with a higher temperature enters the second chamber 7, the second chamber 7 inside the heat exchange tube 5 and the first chamber 8 outside have a temperature difference with a certain temperature gradient, so that the cooling medium with a lower temperature in the first chamber 8 can exchange heat and cool the refrigerant with a higher temperature in the second chamber 7 through the heat exchange tube 5, thereby reducing the temperature of the refrigerant when it enters the expansion valve, improving the refrigeration effect, and reducing the risk of liquid hammer in the compressor.

[0060] It should be noted that there is a temperature difference between the cooling medium and the refrigerant, and the temperature of the cooling medium is lower than the temperature of the refrigerant. The cooling medium can be cold water, cooling oil or low-temperature gas.

[0061] In this embodiment, since the cooling medium with a lower temperature is located outside the heat exchange tube 5 and the refrigerant with a higher temperature is located inside the heat exchange tube 5, the cooling medium with a lower temperature is prevented from causing sudden boiling of the liquid phase separated in the inner tube 4.

[0062] In other embodiments, the refrigerant with a higher temperature may also be located on the outside of the heat exchange tube 5 , and the cooling medium with a lower temperature may be located on the inside of the heat exchange tube 5 .

[0063] It should be mentioned that the outer cylinder 3 in this embodiment is a cylindrical tube with two ends connected. Figure 8 The inner cylinder 4 is a cylinder with a cavity and an opening at one end, and the opening end is sealed with a cover plate 41; of course, the inner cylinder 4 can also be a closed tank with a cavity. The overall structure of the heat exchange cylinder 5 is also a cylindrical tube, and both ends are connected. The inner cylinder 4, the heat exchange cylinder 5, and the outer cylinder 3 are arranged coaxially from the inside to the outside in sequence. A second chamber 7 is formed between the inner cylinder 4 and the heat exchange cylinder 5, and a first chamber 8 is formed between the heat exchange cylinder 5 and the outer cylinder 3.

[0064] The gas-liquid separator of this embodiment further comprises an upper cover 1 and a lower cover 2 . The upper cover 1 is sealedly connected to the upper end of the outer cylinder 3 , and the lower cover 2 is sealedly connected to the lower end of the outer cylinder 3 .

[0065] In other embodiments, either the upper cover 1 or the lower cover 2 can also be integrally formed with the outer cylinder 3, with one end of the outer cylinder 3 being open and the other end opposite to the open end being sealed, which is beneficial to reducing the risk of leakage of the cooling medium or refrigerant.

[0066] refer to Figures 9 to 11 Combined with Figure 3 The upper cover 1 has a first flow channel 12 and a second flow channel 13 separated from each other, the first flow channel 12 is connected to the inner cylinder 4, and the second flow channel 13 is connected to the first chamber 8. The lower cover 2 has a third flow channel 22 and a fourth flow channel 23 separated from each other, the third flow channel 22 is connected to the first chamber 8, and the fourth flow channel 23 is connected to the second chamber 7.

[0067] Specifically, the cover plate 41 at the open end of the inner cylinder 4 is sealed and connected to the inner cylinder 4, and a connecting channel is provided on the cover plate 41, the upper end of the connecting channel is connected to the first flow channel 12, and the lower end of the connecting channel is connected to the interior of the inner cylinder 4; of course, a connecting pipe 411 can also be inserted into the connecting channel, the upper end of the connecting pipe 411 is inserted into the first flow channel 12, and the lower end of the connecting pipe 411 is connected to the internal cavity of the inner cylinder 4.

[0068] The upper cover 1 is also provided with a first interface 10 and a second interface 11. The first interface 10 is located at the end of the first flow channel 12, and can be connected to an external pipeline through the first interface 10 to transport a refrigerant with a higher temperature. The second interface 11 is located at the end of the second flow channel 13, and can be connected to an external pipeline through the second interface 11 to transport a cooling medium with a lower temperature.

[0069] Similarly, the lower cover 2 is also provided with a third interface 20 and a fourth interface 21. The third interface 20 is located at the end of the third flow channel 22, and can be connected to an external pipeline through the third interface 20 to transport a cooling medium with a lower temperature. The fourth interface 21 is located at the end of the fourth flow channel 23, and can be connected to an external pipeline through the fourth interface 21 to transport a refrigerant with a higher temperature.

[0070] The refrigerant with a higher temperature can be input from the first interface 10 and output from the fourth interface 21, or input from the fourth interface 21 and output from the first interface 10. Correspondingly, the cooling medium with a lower temperature can be input from the second interface 11 and output from the third interface 20, or input from the third interface 20 and output from the second interface 11.

[0071] In this embodiment, preferably, the refrigerant with a higher temperature is input from the first interface 10 and output from the fourth interface 21, and the cooling medium with a lower temperature is input from the third interface 20 and output from the second interface 11, so that the refrigerant with a higher temperature and the cooling medium with a lower temperature are in countercurrent contact to fully exchange heat.

[0072] refer to Fig.12 and Fig.13 The heat exchange tube 5 includes a tube body 50, an upper ring body 51 and a lower ring body 52. ​​The hollow interior of the tube body 50 passes through both ends. The upper ring body 51 is connected to the upper end of the tube body 50, and the lower ring body 52 is connected to the lower end of the tube body 50. The upper ring body 51 and the lower ring body 52 are simultaneously connected to the inner wall of the outer tube body 3, thereby forming a closed first chamber 8 between the heat exchange tube 5 and the outer tube body 3, so that the first chamber 8 and the second chamber 7 are isolated from each other.

[0073] The upper ring body 51 is connected to an upper pipe 511, the upper end of which is plugged into the second flow channel 13, and the lower end of which is communicated with the first chamber 8. The lower ring body 52 is connected to a lower pipe 521, the lower end of which is plugged into the third flow channel 22, and the upper end of which is communicated with the first chamber 8.

[0074] Correspondingly, in order to arrange the upper pipe 511 and the lower pipe 521 , the inner cylinder 4 is provided with an avoidance area 40 , and the cylinder body 50 is provided with a recessed area 502 , and the recessed area 502 corresponds to the position of the avoidance area 40 and is adapted to each other.

[0075] In order to improve the heat exchange efficiency, in this embodiment, the upper pipe 511 and the lower pipe 521 are respectively located at the two ends of the diameter of the cylinder body 50, thereby increasing the flow distance of the cooling medium outside the cylinder body 50 and improving the heat exchange efficiency.

[0076] Further, the inner side wall and the outer side wall of the cylinder body 50 are both provided with protrusions 501 or grooves for increasing the heat exchange contact area. For example, the inner side wall of the cylinder body 50 is provided with a groove, and the outer side wall of the cylinder body 50 is provided with a protrusion 501. When the cooling medium with a lower temperature outside the cylinder body 50 flows, the cooling medium can flow along the convex surface of the protrusion 501, thereby increasing the flow distance of the cooling medium and further increasing the heat exchange efficiency with the refrigerant inside the cylinder body 50. The shape of the protrusion 501 or the groove can be hemispherical, ellipsoidal, prismatic, or cylindrical, etc., and the shape and structure of the protrusion 501 or the groove are not limited here. Of course, the inner side wall of the cylinder body 50 can also be provided with a protrusion 501, and the outer side wall of the cylinder body 50 is provided with a groove; or, the inner side wall and the outer side wall of the cylinder body 50 are both provided with a protrusion 501 and a groove, and both can increase the heat exchange area.

[0077] The first chamber 8 may also be provided with a heat dissipation belt to increase the heat exchange area, and the heat dissipation belt is thermally connected to the cylinder body 50; similarly, the second chamber 7 may also be provided with a heat dissipation belt to increase the heat exchange area.

[0078] In another embodiment, the heat exchange tube 5 can also be configured as follows Fig.14 As shown, the heat exchange cylinder 5 includes a cylinder body 50, and an outer flow channel 503 is opened on the outer wall of the cylinder body 50. The first and second ends of the outer flow channel 503 are respectively a first hole 505 and a second hole 506. The first hole 505 is connected to the third flow channel 22, and the second hole 506 is connected to the second flow channel 13. The cooling medium can enter from the first hole 505 and flow along the outer flow channel 503 to the second hole 506, and then be discharged; of course, the cooling medium can also flow in the opposite direction, enter from the second hole 506, and then be discharged from the first hole 505.

[0079] The outer flow channel 503 may also be arranged in various forms, such as a spiral arrangement, a reciprocating serpentine arrangement, or other forms. Fig.15 This embodiment shows a spiral distribution, and the ridges constituting the spiral outer flow channel 503 are sealed with the inner wall of the outer cylinder, so that the cooling medium needs to flow through the outer flow channel 503, so that the cooling medium can fully exchange heat with the refrigerant.

[0080] In order to make the refrigerant flowing in the second chamber 7 flow in a uniform and rapid direction, a plurality of independent inner guide grooves 504 are provided on the inner side wall of the cylinder body 50, and both ends of each inner guide groove 504 penetrate the upper and lower end surfaces of the cylinder body 50. The inner guide grooves 504 may have various shapes, such as rectangular grooves, semicircular grooves, triangular grooves, etc., and the inner guide grooves 504 may be distributed in various ways, such as along the axial direction of the cylinder body 50, or obliquely arranged on the inner side wall of the cylinder body 50, or distributed on the inner side wall of the cylinder body 50 in a curved shape.

[0081] The gas-liquid separator also includes a gas-liquid separation component 6 , which is arranged inside the inner cylinder 4 . The gas-liquid separation component 6 is used to separate the gas phase and the liquid phase in the refrigerant and temporarily store the liquid phase inside the inner cylinder 4 .

[0082] refer to Fig.16 The gas-liquid separation component 6 includes an impact plate 60. The impact plate 60 is arranged below the cover plate 41. The lower end opening of the connecting channel on the cover plate 41 faces the impact plate 60, and a gap is left between the upper side wall of the impact plate 60 and the lower side wall of the cover plate 41, and the gap is communicated with the interior of the inner cylinder 4. When the refrigerant is discharged from the connecting channel, the refrigerant first impacts the impact plate 60, and the liquid phase in the refrigerant adheres to the impact plate 60, thereby separating from the gas phase. The liquid phase on the impact plate 60 will flow into the bottom of the inner cylinder 4 along the edge of the impact plate 60. Of course, if a connecting pipe 411 is inserted in the connecting channel, the lower end opening of the connecting pipe 411 also needs to face the impact plate 60 and be located above the impact plate 60.

[0083] In this embodiment, the impact plate 60 is a circular flat plate, and the edge of the circular flat plate is provided with a protruding side edge for guiding the liquid phase on the flat plate to the inner cylinder 4. For details, please refer to Fig.17 It is worth mentioning that there is a gap between the outer contour edge of the impact plate 60 and the inner wall of the inner cylinder 4. In other embodiments, the impact plate 60 can also be other structures with an inclined surface, a conical surface, etc., and the higher side of the inclined surface or the conical surface is directly opposite to the lower end opening of the connecting tube 411, so as to facilitate the separated liquid phase to be directed to the inner cylinder 4.

[0084] The gas-liquid separation component 6 also includes a sleeve 61, which is used to further separate the residual liquid phase in the gas phase of the refrigerant. The sleeve 61 is arranged inside the inner cylinder 4, and the interior of the sleeve 61 is connected. One end of the sleeve 61 is connected to the interior of the inner cylinder 4, and the other end of the sleeve 61 is connected to the second chamber 7.

[0085] refer to Fig.18 and Fig.19The sleeve 61 includes an outer tube body 611 and an inner tube body 612, the outer tube body 611 includes a first end and a second end, the first end is close to the upper cover 1, and the second end is close to the lower cover 2, and the first end and the second end of the outer tube body 611 are both open; similarly, the interior of the inner tube body 612 is hollow and penetrates to both ends thereof, and the side wall of the inner tube body 612 is connected to the inner side wall of the outer tube body 611; the lower end opening of the inner tube body 612 is connected to the second end opening of the outer tube body 611, and the upper end opening of the inner tube body 612 passes through the impact plate 60 and the cover plate 41 in sequence and then is connected to the second chamber 7; the first end opening of the outer tube body 611 is connected to the interior of the inner cylinder 4, and the second end opening is simultaneously connected to the inner tube body 612 and the interior of the inner cylinder 4.

[0086] When the refrigerant is input from the first flow channel 12, the refrigerant at this time has a gas phase and a liquid phase. The refrigerant mixed with the gas phase and the liquid phase first hits the impact plate 60, so that the liquid phase in the refrigerant adheres to the impact plate 60, thereby completing the preliminary separation of the gas and liquid of the refrigerant. The liquid phase of the refrigerant after separation flows into the inner cylinder 4 for temporary storage, while the gas phase enters the outer tube 611 from the first end of the outer tube 611, then enters the inner tube 612 from the lower end of the inner tube 612, and then enters the second chamber 7. When the refrigerant with a higher temperature flows through the tortuous outer tube 611 and the inner tube 612, the liquid phase remaining in the gas phase will be separated again, and the liquid phase remaining in the gas phase will adhere to the tube walls of the outer tube 611 and the inner tube 612.

[0087] Furthermore, a partition plate 613 is provided between the outer wall of the inner tube body 612 and the inner wall of the outer tube body 611, through which the liquid phase remaining in the gas phase can be further adhered, thereby reducing the liquid content in the gas phase. The liquid phase adhered to the partition plate 613 and the tube walls of the inner tube body 612 and the outer tube body 611 flows into the interior of the inner cylinder 4 through the opening at the second end of the outer tube body 611, and is mixed and stored with the initially separated liquid phase.

[0088] Of course, in order to quickly collect the secondarily separated liquid phase into the inner cylinder 4, the second end of the outer tube 611 is set in a cone, and the bottom of the cone is opened.

[0089] In this embodiment, a sleeve mounting seat 62 is provided on the inner bottom wall of the inner cylinder 4 , and the sleeve 61 is stably disposed inside the inner cylinder 4 through the sleeve mounting seat 62 .

[0090] refer to Fig. 20The sleeve mounting seat 62 is in the shape of a cylindrical bottle cap as a whole, and a plurality of limit blocks 621 are arranged on the inner wall. The plurality of limit blocks 621 are evenly distributed on the inner wall of the sleeve mounting seat 62. Since the second end of the outer tube body 611 is tapered, when the second end of the outer tube body 611 is plugged into the sleeve mounting seat 62, the plurality of limit blocks 621 can clamp and limit the second end of the outer tube body 611, thereby ensuring that the outer tube body 611 is vertically and stably arranged inside the inner cylinder 4.

[0091] The bottom of the sleeve mounting seat 62 is fixed on the inner bottom wall of the inner cylinder 4, and a plurality of through holes 622 are also opened on the circumferential side wall of the sleeve mounting seat 62, and the liquid phase collected from the walls of the partition plate 613, the inner tube body 612, and the outer tube body 611 can flow into the interior of the inner cylinder 4 through the through holes 622.

[0092] In this embodiment, the flow path of the refrigerant with a higher temperature is: first interface 10->first flow channel 12->connecting channel / connecting pipe 411->interior of the inner cylinder 4->first end opening of the outer tube body 611->second end opening of the outer tube body 611->inner tube body 612->upper end opening of the inner tube body 612->second chamber 7->fourth flow channel 23->fourth interface 21.

[0093] The flow path of the cooling medium with a relatively low temperature is: the third interface 20 -> the third flow channel 22 -> the lower pipe 521 -> the first chamber 8 -> the upper pipe 511 -> the second flow channel 13 -> the second interface 11 .

[0094] The gas-liquid separator of the embodiment of the present invention can not only effectively separate the liquid phase in the refrigerant through the impact plate 60 and the sleeve 61, but also cool down the refrigerant with a higher temperature by heat exchange through the heat exchange tube 5, thereby improving the refrigeration effect and reducing the risk of liquid hammer in the compressor.

[0095] In addition, the directional descriptions such as up, down, left, right, inside, and outside mentioned in this embodiment are all descriptions based on the drawings, and other embodiments may include but are not limited to such directional descriptions.

[0096] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A gas-liquid separator with a heat exchange structure, characterized in that: include: An outer cylinder (3) and an inner cylinder (4), wherein the inner cylinder (4) is arranged inside the outer cylinder (3), and a gap exists between the outer peripheral wall of the inner cylinder (4) and the inner peripheral wall of the outer cylinder (3); A heat exchange tube (5), wherein the heat exchange tube (5) is arranged between the outer cylinder (3) and the inner cylinder (4), a first chamber (8) for circulation of a cooling medium is formed between the heat exchange tube (5) and the outer cylinder (3), a second chamber (7) for circulation of a refrigerant is formed between the heat exchange tube (5) and the inner cylinder (4), the first chamber (8) and the second chamber (7) are not communicated with each other, and the second chamber (7) is communicated with the interior of the inner cylinder (4), and the first chamber (8) and the interior of the inner cylinder (4) are not communicated with each other.

2. The gas-liquid separator with a heat exchange structure according to claim 1, characterized in that: The gas-liquid separator further comprises an upper cover (1), the upper cover (1) being provided with a first flow channel (12) and a second flow channel (13) separated from each other, the first flow channel (12) being connected to the interior of the inner cylinder (4), and the second flow channel (13) being connected to the first chamber (8).

3. The gas-liquid separator with a heat exchange structure according to claim 2, characterized in that: The gas-liquid separator further comprises a lower cover (2), the lower cover (2) being provided with a third flow channel (22) and a fourth flow channel (23) separated from each other, the third flow channel (22) being in communication with the first chamber (8), and the fourth flow channel (23) being in communication with the second chamber (7).

4. The gas-liquid separator with a heat exchange structure according to claim 3, characterized in that: The heat exchange cylinder (5) comprises a cylinder body (50), an upper ring body (51) and a lower ring body (52); the hollow interior of the cylinder body (50) is connected to both ends; the upper ring body (51) is connected to the upper end of the cylinder body (50); the lower ring body (52) is connected to the lower end of the cylinder body (50); and the upper ring body (51) and the lower ring body (52) are simultaneously connected to the inner side wall of the outer cylinder body (3); The upper ring body (51) is also connected to an upper pipe (511), the upper end of which is in communication with the second flow channel (13), and the lower end of which is in communication with the first chamber (8); the lower ring body (52) is also connected to a lower pipe (521), the upper end of which is in communication with the first chamber (8), and the lower end of which is in communication with the third flow channel (22).

5. The gas-liquid separator with a heat exchange structure according to claim 4, characterized in that: The inner wall and the outer wall of the cylinder body (50) are both provided with protrusions (501) or grooves for increasing the contact area between the cooling medium and the refrigerant.

6. The gas-liquid separator with a heat exchange structure according to claim 3, characterized in that: The heat exchange cylinder (5) comprises a cylinder body (50), an outer wall of the cylinder body (50) is provided with an outer flow channel (503), the beginning and end of the outer flow channel (503) are respectively a first hole (505) and a second hole (506), the first hole (505) is connected to the third flow channel (22), and the second hole (506) is connected to the second flow channel (13).

7. The gas-liquid separator with a heat exchange structure according to claim 6, characterized in that: The outer flow channel (503) is arranged in a spiral shape, and the convex ridges constituting the outer flow channel (503) are sealedly connected to the inner wall of the outer cylinder (3).

8. The gas-liquid separator with a heat exchange structure according to claim 6, characterized in that: A plurality of independent inner flow guide grooves (504) are provided on the inner side wall of the cylinder body (50), and both ends of each inner flow guide groove (504) penetrate the upper and lower end surfaces of the cylinder body (50).

9. The gas-liquid separator with a heat exchange structure according to any one of claims 2 to 8, characterized in that: One end of the inner cylinder (4) is open, and the open end is covered with a cover plate (41), and a connecting channel is provided on the cover plate (41), the upper end of the connecting channel is connected to the first flow channel (12), and the lower end of the connecting channel is connected to the interior of the inner cylinder (4).

10. The gas-liquid separator with a heat exchange structure according to claim 9, characterized in that: The gas-liquid separator further comprises a gas-liquid separation component (6), wherein the gas-liquid separation component (6) is arranged inside the inner cylinder (4), and the gas-liquid separation component (6) is used to separate gas phase and liquid phase in the refrigerant.

11. The gas-liquid separator with a heat exchange structure according to claim 10, characterized in that: The gas-liquid separation component (6) comprises an impact plate (60), wherein the impact plate (60) is located at the lower part of the cover plate (41), the lower end opening of the connecting channel on the cover plate (41) faces the impact plate (60), and a gap is left between the upper side wall of the impact plate (60) and the lower side wall of the cover plate (41), and the gap is communicated with the interior of the inner cylinder (4).

12. The gas-liquid separator with a heat exchange structure according to claim 10, characterized in that: The gas-liquid separation component (6) further comprises a sleeve (61), the interior of the sleeve (61) is communicated, one end of the sleeve (61) is communicated with the interior of the inner cylinder (4), and the other end of the sleeve (61) is communicated with the second chamber (7).

13. The gas-liquid separator with a heat exchange structure according to claim 12, characterized in that: The sleeve (61) is arranged inside the inner cylinder (4), and the sleeve (61) comprises an outer tube body (611) and an inner tube body (612); The first end and the second end of the outer tube (611) are both open, the first end is close to the cover plate (41), and the second end is far from the cover plate (41), the first end and the second end are both open, the opening of the first end is in communication with the interior of the inner tube (4), and the opening of the second end is in communication with both the inner tube (612) and the interior of the inner tube (4); One side of the inner tube body (612) is connected to the inner wall of the outer tube body (611), the lower end of the inner tube body (612) is connected to the second end of the outer tube body (611), and the upper end of the inner tube body (612) is connected to the second chamber (7).

14. The gas-liquid separator with a heat exchange structure according to claim 12, characterized in that: A sleeve mounting seat (62) is provided inside the inner cylinder (4), and the sleeve (61) is connected to the sleeve mounting seat (62).

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