CN113266969B - Gas-liquid separator - Google Patents

Abstract

A gas-liquid separation device, comprising: the shell comprises a cylinder body and a sealing cover connected with the cylinder body, and the sealing cover is provided with a refrigerant inlet and a refrigerant outlet. The umbrella cap includes the division board and follows the perisporium portion of keeping away from the refrigerant import extension from the peripheral part of division board, and the division board includes relative perisporium portion to being close to the convex bulge of refrigerant import, and on the bulge was followed direction of height's a cross-section, the bulge included the protrusion summit and was connected the side line that the protrusion summit reaches perisporium portion, and the slope of side line relative separation plate thickness direction sets up, is favorable to the even separation of refrigerant, and gas-liquid separation effect preferred.

Description

Gas-liquid separator

Technical Field

The application relates to the technical field of refrigeration equipment, in particular to a gas-liquid separation device.

Background

As shown in fig. 28, the gas-liquid separation apparatus in the related art includes a housing 2, an umbrella cap 15, and a guide pipe 8. The shell 2 comprises a cylinder 3 and a sealing cover 4, the sealing cover 4 is provided with a refrigerant inlet 5 and a refrigerant outlet 6, the umbrella cap 15 comprises a separation plate which is arranged opposite to the refrigerant inlet 5, the separation plate comprises a convex part 18 protruding towards the refrigerant inlet, and the convex part 18 is used for gas-liquid separation of gas-liquid two-phase refrigerants.

In the related art, the separating plate is formed in a planar shape on opposite sides of the protruding portion 18, and is perpendicular to the height direction of the gas-liquid separating device, which is not favorable for separating the gas-liquid two-phase refrigerant.

Disclosure of Invention

The application aims at: the gas-liquid separation device is beneficial to gas-liquid two-phase refrigerants to realize gas-liquid separation.

A gas-liquid separation device, comprising: the umbrella comprises a shell, an umbrella cap and a catheter, wherein the shell is provided with an inner cavity, the umbrella cap is at least partially positioned in the inner cavity, and the catheter is at least partially positioned in the inner cavity; the shell comprises a cylinder body and a sealing cover connected with the cylinder body, and the sealing cover is arranged at one end of the gas-liquid separation device in the height direction; the sealing cover is provided with a refrigerant inlet and a refrigerant outlet, the umbrella cap comprises a separating plate and a peripheral wall part extending from the peripheral part of the separating plate along the direction far away from the refrigerant inlet, the separating plate is provided with a part of area and is arranged opposite to the refrigerant inlet, and a gap is formed between the peripheral wall part and the shell;

the conduit comprises a first port part, a second port part and a pipeline for communicating the first port part with the second port part, the separation plate is positioned between the first port part and the refrigerant inlet, the refrigerant inlet is communicated with an inner cavity in a fluid manner, the inner cavity is communicated with the first port part in a fluid manner, and the second port part is communicated with the refrigerant outlet in a fluid manner;

the separating plate comprises a convex part which is convex towards the direction close to the refrigerant inlet relative to the peripheral wall part, the convex part is arranged on one section of the convex part along the height direction, the convex part comprises a convex vertex and a side surface line which is connected with the convex vertex to the peripheral wall part, and the side surface line is obliquely arranged relative to the height direction (Y).

Compare in correlation technique, the bulge of this application includes the bulge summit and connects the side line of bulge summit to week wall portion, the relative direction of height slope setting of separation plate of side line, the deformation of bulge is less to be favorable to the gas-liquid separation of gas-liquid two-phase refrigerant, the gas-liquid separation effect preferred.

Drawings

Fig. 1 is a schematic perspective view of a gas-liquid separator according to the present application.

Fig. 2 is a schematic exploded perspective view of a gas-liquid separator according to the present application.

Fig. 3 is a perspective view of a part of the gas-liquid separator shown in fig. 2.

FIG. 4 is a further exploded schematic view of the gas-liquid separator shown in FIG. 3.

Fig. 5 is an exploded perspective view of the gas-liquid separator of fig. 4 from another perspective.

FIG. 6 is a schematic perspective cross-sectional view of a gas-liquid separator according to the present application.

FIG. 7 is another schematic perspective cross-sectional view of a gas-liquid separator according to the present application.

FIG. 8 is a schematic cross-sectional view of a gas-liquid separator according to the present application.

Fig. 9 is an enlarged schematic view of the filter portion shown in fig. 8.

FIG. 10 is an enlarged schematic view of another embodiment of the filter of the present application.

Fig. 11 is a partially enlarged schematic view of the gas-liquid separator shown in fig. 8.

Fig. 12 is a perspective view of a filter according to the present application.

FIG. 13 is a schematic perspective cross-sectional view of a filter according to the present application.

Fig. 14 is a schematic perspective view of a gas-liquid separation device according to the present application.

Fig. 15 is a schematic perspective exploded view of the gas-liquid separator of the present application.

Fig. 16 is a schematic perspective sectional view of a gas-liquid separation device according to the present application.

Fig. 17 is another schematic perspective sectional view of the gas-liquid separation device according to the present application.

Fig. 18 is a perspective view of a portion of the components shown in fig. 14.

Fig. 19 is an exploded perspective view of a portion of the components shown in fig. 18.

Fig. 20 is an exploded view of a portion of the components shown in fig. 19 from another perspective.

FIG. 21 is a schematic diagram of the heat pipe system of the present application.

FIG. 22 is a schematic illustration of the heat pipe system of the present application in a passenger compartment cooling mode.

Fig. 23 is a schematic view of the heat pipe system of the present application in a passenger compartment heating mode.

FIG. 24 is a schematic illustration of the heat pipe system of the present application in a passenger compartment cooling and battery motor cooling mode.

FIG. 25 is another schematic representation of the heat pipe system of the present application in a passenger compartment cooling and battery motor cooling mode.

Fig. 26 is yet another schematic illustration of the heat pipe system of the present application in a passenger compartment cooling and battery motor cooling mode.

FIG. 27 is a schematic illustration of the heat pipe system of the present application in a passenger compartment heating and waste heat recovery mode.

Fig. 28 is a schematic sectional view of a related-art gas-liquid separation device.

Detailed Description

As shown in fig. 1 to 6, a gas-liquid separation apparatus 100 according to the present application includes a gas-liquid separator 97. The gas-liquid separator 97 includes: housing 102, umbrella cap 3, conduit 4, filter element 5 and molecular sieve bag 61.

The gas-liquid separator 97 has an inner cavity 101, and the housing 102 forms the inner cavity 101. The umbrella cap 3 is at least partially located in the inner cavity 101, the catheter 4 is at least partially located in the inner cavity 101, and the molecular sieve bag 61 is located in the inner cavity 101.

The housing 102 includes a barrel 1 and a cover 2 connected to the barrel 1. The cap 2 is provided on one side of the gas-liquid separator 100/gas-liquid separator 97 in the height direction Y, and the cap 2 is provided at one end of the cylinder 1 in the longitudinal direction. The sealing cover 2 and the cylinder body 1 can be made of aluminum materials, and the sealing cover 2 and the cylinder body 1 are fixedly connected and hermetically connected with each other through a welding process. Referring to fig. 1 and 2, the joint of the cover 2 and the cylinder 1 has a welding table 107 formed by welding, wherein the specific welding method may be argon arc welding, flame welding, or the like.

The conduit 4 is directly connected to the closure 2 or indirectly connected via other means, i.e. the conduit 4 may be directly fixed to the closure 2 or indirectly fixed to the closure 2 via other means. The umbrella cap 3 is directly connected to the cover 2 or indirectly connected through other means, i.e. the umbrella cap 3 may be directly fixed to the cover 2 or indirectly fixed to the cover 2 through other means.

The cover 2 has a first refrigerant inlet 21, a second refrigerant inlet 22 and a refrigerant outlet 20. The first refrigerant inlet 21, the second refrigerant inlet 22 and the refrigerant outlet 20 are respectively disposed on different sides of the sealing cover 2, so as to facilitate connection with an external pipeline. The canopy 3 includes a separation plate 31 and a peripheral wall portion 33 extending from an outer peripheral portion 32 of the separation plate 31 in a direction away from the first refrigerant inlet 21, wherein the peripheral wall portion 33 has a ring shape. The separating plate 31 has a partial area facing/opposing the first refrigerant inlet 21, or in other words, a projection profile of the first refrigerant inlet 21 on a plane projection perpendicular to the height direction falls within the projection profile of the separating plate 31. With this arrangement, the separating plate 31 can collide with the refrigerant entering from the first refrigerant inlet 21, thereby enhancing the gas-liquid separation effect.

As shown in fig. 8, a gap 103 is provided between the peripheral wall 33 and the housing 102 to facilitate the flow of the refrigerant. The peripheral wall portion 33 has a ring shape, so that the umbrella cap 3 has a cavity 34 between the separation plate 31 and the peripheral wall portion 33.

As shown in fig. 4 to 8, the conduit 4 has a first port portion 41, a second port portion 42, and an intermediate portion 43 connected between the first port portion 41 and the second port portion 42. The first port portion 41 has a first port 411, the second port portion 42 has a second port 421, and the intermediate portion 43 has a conduit 431, the conduit 431 communicating the first port 411 and the second port 421. The first refrigerant inlet 21 is communicated with the inner cavity 101, the inner cavity 101 is communicated with the first port 411, and the pipe 431 is communicated with the refrigerant outlet 20, so that the conduit 4 can guide the gaseous refrigerant in the inner cavity 101 to the refrigerant outlet 20.

Referring to fig. 6 and 22 in combination, the flow of the refrigerant in the gas-liquid separation device 100 is shown when the thermal management system 80 is operating in the passenger compartment cooling mode, and the arrows indicate the flow direction of the refrigerant or coolant. Liquid refrigerant and gaseous refrigerant mix together and form gas-liquid two-phase refrigerant and get into from second refrigerant import 22, and strike with inner wall 24 of closing cap 2, the separation of gaseous refrigerant and liquid refrigerant has been strengthened, get into the barrel cavity 12 of barrel 1 in clearance 103 again, wherein, liquid refrigerant falls into the barrel cavity 12 bottom of barrel 1 under the action of gravity, gaseous refrigerant suspends in barrel cavity 12 top, and get into refrigerant export 20 from cavity 34 through first port 411, pipeline 431, second port 421, thereby export gaseous refrigerant to the outside of gas-liquid separation device 100, realize the gas-liquid separation of gas-liquid two-phase refrigerant.

Referring to fig. 7 and 23 in combination, the gas-liquid separation device 100 provides a flow of the refrigerant when the thermal management system 80 is in the passenger compartment heating mode, and the arrows indicate a flow direction of the refrigerant or the coolant. The liquid refrigerant and the gaseous refrigerant are mixed together to form a gas-liquid two-phase refrigerant, the gas-liquid two-phase refrigerant enters from the first refrigerant inlet 21 and collides with the partition plate 31, the separation of the gaseous refrigerant and the liquid refrigerant is enhanced, the gas-liquid two-phase refrigerant enters the barrel cavity of the barrel body 1 through the gap 103, the liquid refrigerant falls into the bottom of the barrel cavity 12 of the barrel body 1 under the action of gravity, the gaseous refrigerant suspends at the top of the barrel cavity 12 and enters the refrigerant outlet 20 from the cavity 34 through the first port 411, the pipeline 431 and the second port 421, and the gaseous refrigerant is output to the outside of the gas-liquid separation device 100, so that the gas-liquid separation of the gas-liquid two-phase refrigerant is realized.

As shown in fig. 8, the first port 41 is located in the cavity 34, and the partition plate 31 and the peripheral wall 33 block the first port 411 to reduce the risk that the liquid refrigerant in the refrigerant directly enters.

As shown in fig. 5 and 9, the intermediate portion 43 includes a tube bottom portion 44, and the tube bottom portion 44 is distant from the cap 2 with respect to the first port portion 41 and the second port portion 42. The tube bottom portion 44 includes a tube inner wall surface 441 and a tube outer wall surface 442, the tube bottom portion 44 has a first through hole 443 penetrating the tube inner wall surface 441 and the tube outer wall surface 442, the filter member 5 has an oil return hole 50, and the oil return hole 50 communicates with the duct 431. The filter member 5 includes a first portion 53 fitted on the outer wall surface 442 of the tube and a second portion 54 inserted into the first through hole 443 from the first portion 53 and extending toward the duct 431, and the second portion 54 extends beyond the inner wall surface 441 of the tube by a distance L of not more than 1 mm. The distance L that the second portion 54 extends beyond the inner wall surface 441 of the tube is not more than 1mm, the high-speed gaseous refrigerant along the inner wall surface 441 of the tube 4 can better drive the lubricating oil to circulate into the tube 4 and return to the compressor and the thermal management system, and the oil return effect of the filter element 5 is better. In the related art, the second portion 54 extends far more than 1mm beyond the inner wall surface 441 of the pipe, and the high-speed gaseous refrigerant flow generates turbulence at the second portion 54, which affects the return of the lubricating oil from the oil return hole 50 of the second portion 54 to the compressor, thereby causing the risk of insufficient lubrication of the compressor 81.

As shown in fig. 10, in another embodiment of the filter element 5, the second portion 54 includes a distal end surface 541, and the distal end surface 541 of the second portion 54 is aligned with the tube inner wall surface 441, that is, the distance L that the second portion 54 extends beyond the tube inner wall surface 441 is 0mm, so that the influence of the second portion 54 on the turbulent flow of the gaseous refrigerant can be reduced to the maximum, and the lubricant oil can be returned to the compressor 81 from the oil return hole 50 of the second portion 54 more favorably. It should be noted that the manufacturing tolerance and the assembly tolerance of the second portion 54 are also within the protection scope of the present application, for example, the distance L of the second portion 54 beyond the tube inner wall surface 441 is 0.1mm, or the distance of the second portion 54 not beyond the tube inner wall surface 441 and from the tube inner wall surface 441 is 0.1mm, which falls within the protection scope of the present application.

The guide tube 4 is a U-shaped tube, the first through hole 443 extends in the height direction Y, the end surface 541 forms a first connecting line 471, the inner wall surface 441 of the tube forms a first bottom point 444 and a second bottom point 445 arranged at intervals in a vertical cross section passing through a central axis of the first through hole 443, the first bottom point 444 and the second bottom point 445 are respectively located on opposite sides of the first through hole 443, and the second connecting line 472 between the first bottom point 444 and the second bottom point 445 at least partially coincides with the first connecting line 471. The first line 471 and the second line 472 are both straight lines.

In an alternative embodiment (not shown), the second portion 54 does not extend beyond the tube inner wall surface 441, and the distance from the tube inner wall surface 441 is not more than 1mm, so that the oil return performance of the filter element 5 is better, but the stability of fixing to the conduit 4 is slightly poor.

As shown in fig. 8 and 11, the separating plate 31 includes a convex portion 35 that protrudes toward the first refrigerant inlet 21 with respect to the peripheral wall portion 33, and in a cross section in the height direction Y, the convex portion 35 includes a convex vertex 351 and a side surface line 352 that connects the convex vertex 351 to the peripheral wall portion 33, and the side surface line 352 is provided obliquely with respect to the thickness direction or the height direction Y of the separating plate 31. In alternative embodiments (not shown), the protruding portion 35 has a frustum shape, or the cross section of the protruding portion 35 has a trapezoid shape, or the cross section of the protruding portion 35 includes a plurality of protruding vertexes 351 arranged at intervals, and the plurality of protruding vertexes 351 are connected by a straight line or an arc line. The shape of the protruding portion 35 is various and is not described here, and it is important that the side surface line 352 is not perpendicular to the height direction Y, which falls within the scope of the present application.

The first port 41 is located below the separating plate 31 in the height direction Y, the top end surface of the first port 41 is higher than the bottom end surface of the peripheral wall 33, and a gap is formed between the top end surface of the first port 41 and the separating plate 31, so that the risk that the refrigerant flowing down from the gap 103 directly enters the first port 4 can be reduced. The thickness direction of the separation plate 31 is the same as or parallel to the height direction Y.

As shown in fig. 8 and 11, in a cross section of the umbrella cap 3 in the height direction Y, the peripheral wall portion 33 includes a straight line portion 36 and an arc line portion 37 connected between the straight line portion 36 and a side surface line 352, and the side surface line 352 forms an acute angle or an obtuse angle with the height direction Y. In a cross section of the umbrella cap 3 in the height direction Y, the peripheral wall portion 33 includes a first straight line 361, a second straight line 362, a first arc line 371, and a second arc line 372, the first straight line 361 and the second straight line 362 are disposed at intervals, and both the first straight line 361 and the second straight line 362 extend in the height direction Y.

In a cross section of the umbrella cap 3 in the height direction Y, the protrusion 35 includes a protrusion vertex 351, a first oblique line 381, and a second oblique line 382, the first arc line 371 is connected between the first oblique line 381 and the first straight line 361, and the second arc line 372 is connected between the second oblique line 382 and the second straight line 362. The length of the first oblique line 381 is smaller than that of the second oblique line 382, and the included angle between the first oblique line 381 and the height direction is smaller than that between the second oblique line 382 and the height direction. The first oblique line 381 and the second oblique line 382 may be arc-shaped or straight lines, but are not perpendicular to the height direction Y. Because of the straight surface perpendicular to the height direction, the gas-liquid separation of the gas-liquid two-phase refrigerant is not facilitated.

As shown in fig. 11, the central axis C of the first refrigerant inlet 21 passes through the convex vertex 351 of the convex portion 35, the convex portion 35 has a conical shape, and the conical structure is favorable for the gas-liquid two-phase refrigerant to collide with each other, so as to promote the gas-liquid separation of the gas-liquid two-phase refrigerant. Through experimental verification, the value range of the thickness W of the separation plate 31 is as follows: when W is more than or equal to 15 mm and less than or equal to 25mm, the gas-liquid separation effect is better.

In a cross section of the umbrella cap 3 in the height direction Y, the umbrella cap 3 comprises a third line 383 facing the cavity 34, a fourth line 384 and a fifth line 385, the third line 383 is arranged in parallel with the first line 361, the fourth line 384 is arranged in parallel with the second line 362, and the fifth line 385 is perpendicular to the third line 383 and the fourth line 384.

In a cross section of the umbrella cap 3 in the height direction Y, the umbrella cap 3 comprises a third arc 373 and a fourth arc 374 facing towards the cavity 34, the third arc 373 being connected between the third line 383 and the fifth line 385, and the fourth arc 374 being connected between the fourth line 384 and the fifth line 385. The arc length of third arc 373 is less than the arc length of first arc 371 and the arc length of fourth arc 374 is less than the arc length of second arc 372.

In a cross section of the umbrella cap 3 in the height direction Y, the minimum thickness of the separation plate 31 in the height direction Y is larger than the maximum thickness of the peripheral wall portion 33 in the lateral direction X, which is perpendicular to the height direction Y. The structure improves the gas-liquid separation effect of the gas-liquid two-phase refrigerant under the condition of occupying the space of the inner cavity 101 as little as possible.

As shown in fig. 2 to 7, the cylinder body 1 comprises a cylinder wall 11 and a cylinder cavity 12, the cover 2 comprises an outer peripheral wall 23 and an inner wall 24, and the outer peripheral wall 23 of the cover 2 is fixedly connected with the cylinder wall 11 of the cylinder body 1 and is arranged in a sealing manner at the connection position. The cap 3 is fixed to the inner wall 24 of the cover 2 and the conduit 4 is fixed to the inner wall 24 of the cover 2.

The cover 2 has a cavity 25, the cap 3 is accommodated in the cavity 25, the inner wall 24 of the cover 2 includes a first wall surface 241 surrounding the peripheral wall portion 33 and a second wall surface 242 facing the separation plate 31, and a gap 103 is provided between the peripheral wall portion 33 and the first wall surface 241. A space 104 is provided between the second wall surface 242 and the separation plate 31, and the space 104 communicates with the cylindrical chamber 12 through the gap 103 between the peripheral wall portion 33 and the first wall surface 241.

As shown in fig. 7, the second port portion 42 of the conduit 4 is inserted into the refrigerant outlet 20, and the outer wall surface 422 of the second port portion 42 is welded and fixed to the inner wall surface 243 of the refrigerant outlet 20 by welding such as argon arc welding or flame welding.

As shown in fig. 5, the cover 2 has a plurality of columns 26 protruding from the second wall 242, the umbrella cap 3 has a plurality of through holes 39 corresponding to the plurality of columns 26 one by one, the columns 26 are inserted into the through holes 39, and the walls of the through holes 39 are welded and fixed to the walls of the columns 26, wherein the welding mode may be argon arc welding, flame welding, or the like.

As shown in fig. 4 to 7, the peripheral wall 33 of the umbrella cap 3 includes an arc surface 332 and an escape groove 333 which is recessed inward relative to the arc surface 332, the sealing cap 2 includes a connecting portion 27 which is located in the escape groove 333, the refrigerant outlet 20 has a portion which is located in the connecting portion 27, and the second port portion 42 of the duct 4 is fixedly connected to the connecting portion 27.

As shown in fig. 1 to 3, the peripheral wall 23 of the cap 2 includes a top surface 231 and a peripheral surface 232, the top surface 231 and the peripheral surface 232 are located on different sides of the cap 2, and the peripheral surface 232 of the cap 2 and the cylinder wall 11 of the cylinder 1 are at least partially joined and are sealingly disposed at the joint. The first refrigerant inlet 21 penetrates the top surface 231, and the refrigerant outlet 20 penetrates the outer peripheral surface 232.

The outer peripheral surface 232 includes a circumferential surface 233 and a vertical surface 234, the circumferential surface 233 is welded to the inner cylindrical surface 111 of the cylindrical wall 11, the vertical surface 234 extends in a direction parallel to the height direction Y of the gas-liquid separation apparatus 100, the top surface 231 extends in a direction perpendicular to the height direction Y, and the second refrigerant inlet 22 penetrates the vertical surface 234.

The vertical surface 234 includes a first vertical surface 235 and a second vertical surface 236 disposed in parallel with each other, the refrigerant outlet 20 penetrates the first vertical surface 235, the second refrigerant inlet 22 penetrates the second vertical surface 236, and the vertical surface 234 further includes a third vertical surface 237 connected between the first vertical surface 235 and the second vertical surface 236, the third vertical surface 237 being perpendicular to the first vertical surface 235 and the second vertical surface 236.

The cover 2 comprises a horizontal plane 239, the horizontal plane 239 is connected with the first vertical plane 235, the second vertical plane 236 and the third vertical plane 237, the horizontal plane 239 is arranged in parallel with the top surface 231, the horizontal plane 239 is located below the top surface 231, and the first vertical plane 235, the second vertical plane 236 and the third vertical plane 237 are located below the horizontal plane 239. The cover 2 further comprises a fourth vertical surface 238 connected between the horizontal surface 239 and the top surface 231, the fourth vertical surface 238 being arranged parallel to the third vertical surface 237. The stepped horizontal surface 239 and the top surface 231 facilitate installation of the four-way valve 71 and the expansion valve 72, which will be described later.

The gas-liquid separator 97 further includes a connection pipe 62, one end of the connection pipe 62 is fixedly connected to the cover 2, a gap is formed between the other end of the connection pipe 62 and the separation plate 31, a lumen 621 of the connection pipe 62 is communicated with the first refrigerant inlet 21, the lumen 621 of the connection pipe 62 can be used as a part of the first refrigerant inlet 21, and at least a partial region of the separation plate 31 is disposed to face the connection pipe 62.

As shown in FIG. 11, the minimum distance D between the adapter tube 62 and the separation plate 31 is 3 mm. ltoreq. D.ltoreq.5 mm. With the arrangement, the gas-liquid separation effect is better, because the high-speed gas-liquid two-phase refrigerant can completely flush the umbrella cap 3 after the connecting pipe 62 is added and uniformly flows on the umbrella cap 3 to form gas-liquid separation, otherwise, a part of gas-liquid two-phase refrigerant flows into the barrel cavity 12 through the interval between the umbrella cap 3 and the sealing cover 2, and the separation effect is poor. In addition, the height of the cap 2 can be increased by providing the adapter 62, so that the second refrigerant inlet 22 and the refrigerant outlet 20 can be provided with a sufficient space on the outer peripheral surface 232. The following relationship is satisfied between the thickness W of the separation plate 31 and the minimum distance D of the adapter tube 62 from the separation plate 31: W/D is 3. ltoreq. W/D. ltoreq.9, and the gas-liquid separation effect of the gas-liquid separator 97 thus provided is within the optimum range.

As shown in fig. 11, the separating plate 31 includes a convex portion 35 protruding from the peripheral wall portion 33 toward the refrigerant inlet 21, and the convex portion 35 includes a convex vertex 351 and a side line 352 connecting the convex vertex 351 to the peripheral wall portion 33 in a cross section along a thickness direction of the separating plate 31, the side line 352 is inclined with respect to a height direction Y or the thickness direction of the separating plate 31, and a minimum distance D between the convex vertex 351 and the adapter 62 is 3mm or more and 5mm or less. The arrangement of the convex part 35 further enhances the separation effect of the gas-liquid two-phase refrigerant.

The aperture of the first refrigerant inlet 21 of the heating refrigerant inlet is smaller than that of the second refrigerant inlet 22 of the refrigerating refrigerant inlet, and the aperture of the second refrigerant inlet 22 is smaller than that of the refrigerant outlet 20, so that the gas-liquid separation device 100 can enter and exit refrigerants under different working states, and the energy efficiency ratio of the heat management system can be improved.

As shown in fig. 5 and 6, the sealing cap 2 has a partition wall 29, the sealing cap 2 has a first cavity 291 and a second cavity 292 on opposite sides of the partition wall 29, the first refrigerant inlet 21 is communicated with the first cavity 291, the second refrigerant inlet 22 is communicated with the second cavity 292, a first partition 105 is formed between the umbrella cap 3 and the first cavity 291, and a second partition 106 is formed between the umbrella cap 3 and the second cavity 292. The first compartment 105 and the second compartment 106 form the aforementioned compartment 104.

As shown in fig. 6 and 7, in the height direction Y of the gas-liquid separator 100, the second refrigerant inlet 22 is higher than the umbrella cap 3, the first refrigerant inlet 21 is higher than the second refrigerant inlet 22, and the first refrigerant inlet 21 is higher than the refrigerant outlet 20.

As shown in fig. 11, the cover 2 includes a first mounting opening 293, the adapter tube 62 is inserted into the first mounting opening 293, the diameter of the first mounting opening 293 is larger than the outer diameter of the adapter tube 62, and the adapter tube 62 is welded to the wall of the hole corresponding to the first mounting opening 293.

As shown in fig. 12 and 13, the filter member 5 includes a bracket 51 and a filter net 52, and the bracket 51 includes a base 511, a first jaw 512, and a second jaw 513. The screen 52 is attached to the lower end of the base 511, the first jaw 512 and the second jaw 513 are attached to the upper end of the base 511, the first jaw 512 and the second jaw 513 are detachably snap-connected, and the first jaw 512 and the second jaw 513 surround the tube bottom 44. The first jaw 512 and the second jaw 513 may be integrally formed with the base 511 by injection molding, or may be separately manufactured and assembled together. The filter net 52 and the base 511 may be integrally molded by insert molding or may be fixed by assembling. The screen 52 has a plurality of mesh openings (not shown) to facilitate the passage of lubricant therethrough.

The base 511 is a plastic member, the filter net 52 is a metal member, and the filter net 52 is a cap filter net 52. The filter 52 has a filter chamber 521, the base 511 includes a base chamber 514, and the oil return hole 50 penetrates the base 511 in a height direction. The filter screen chamber 521 communicates with the base chamber 514, the base chamber 514 communicates with the scavenge port 50, and the volume of the filter screen chamber 521 is greater than the volume of the base chamber 514 to facilitate scavenge of the lubricating oil.

The first claw 512 comprises a first curved surface 515 used for being attached to the guide pipe 4, the second claw 513 comprises a second curved surface 516 attached to the guide pipe 4, the base 511 comprises a first top surface 517 positioned below the first curved surface 515 and the second curved surface 516, the support 51 comprises a first groove 518 positioned between the first top surface 517 and the first curved surface 515 and the second curved surface 516, the support 51 comprises a convex column 519 extending from the first top surface 517 to be close to the guide pipe 4, and the oil return hole 50 penetrates through the convex column 519 and the base 511. The first groove 518 facilitates insertion of the post 519 into the first through-hole 443.

As shown in fig. 4 to 7, the molecular sieve bag 61 is located in the inner cavity 101, and the molecular sieve bag 61 is filled with molecular sieve. The intermediate portion 43 of the catheter 4 comprises a first tube portion 432 and a second tube portion 433, the first tube portion 432 being connected between the first port portion 41 and the tube bottom portion 44, the second tube portion 433 being connected between the second port portion 42 and the tube bottom portion 44, a gap 434 being formed between the first tube portion 432 and the second tube portion 433, and the molecular sieve bag 61 being at least partially located within the gap 434.

As shown in fig. 14 to 20, the gas-liquid separation device 100 further includes a four-way valve 71, an expansion valve 72, and a connecting body 73 connected between the four-way valve 71 and the expansion valve 72, the four-way valve 71 and the connecting body 73 being fixed, the expansion valve 72 and the connecting body 73 being fixed, and the connecting body 73 and the cover 2 being fixed. The expansion valve 72 may be an electronic expansion valve to improve the accuracy of refrigerant control.

As shown in fig. 16, the four-way valve 71 includes a first flow passage 710, the expansion valve 72 includes a second flow passage 721, the connecting body 73 includes a third flow passage 731, the first flow passage 710 communicates with the third flow passage 731, and the third flow passage 731 communicates with the second flow passage 721. The four-way valve 71 includes a first communication hole 711, a second communication hole 712, a third communication hole 713, and a fourth communication hole 714. The third communication hole 713 communicates the first flow channel 710 and the third flow channel 731.

The gas-liquid separation device 100 includes a first fastening member 74 and a second fastening member 75, the first fastening member 74 fastens the expansion valve 72 and the connecting body 73, the first fastening member 74 fastens the four-way valve 71 and the connecting body 73, and the second fastening member 75 fastens the connecting body 73 and the cover 2. Alternatively, the four-way valve 71 and the connecting body 73 are fixedly connected by welding, and the expansion valve 72 and the connecting body 73 are fixedly connected by welding. The first fastening member 74 and the second fastening member 75 may be bolts, and screw holes corresponding to the bolts are provided at corresponding portions of the four-way valve 71, the expansion valve 72, and the connecting body 73.

As shown in fig. 21, a thermal management system 80 having a gas-liquid separation device 100 is provided. The thermal management system 80 includes a compressor 81, a first dual-flow-channel heat exchanger 82, a second dual-flow-channel heat exchanger 83, a third dual-flow-channel heat exchanger 84, an outdoor heat exchanger 85, a low-temperature radiator 86, a first indoor heat exchanger 87, a second indoor heat exchanger 88, a first water pump 89, a second water pump 901, a third water pump 902, a first three-way water valve 91, a second three-way water valve 92, a battery heat exchanger 93, a motor heat exchanger 94, an air conditioning cabinet 95, a fan 96, a first throttle valve 981, a second throttle valve 982, a four-way water valve 99, and a gas-liquid separation device 100.

The gas-liquid separation device 100 integrates three components, namely a gas-liquid separator 97, a four-way valve 71 and an expansion valve 72, so that pipelines and connection points which are connected with each other among elements are saved, the element cost is reduced, and the risk of refrigerant leakage caused by failure of the connection points is reduced. The first, second and third dual- channel heat exchangers 82, 83, 84 may be plate heat exchangers or shell and tube heat exchangers. When the thermal management system 80 adopts R134a and R1234yf refrigerants as working refrigerants, the first dual-flow heat exchanger 82, the second dual-flow heat exchanger 83 and the third dual-flow heat exchanger 84 are preferably plate heat exchangers, so that the volume of the dual-flow heat exchangers can be reduced.

When the thermal management system 80 uses the CO2(R744) refrigerant as the working refrigerant, the first dual-channel heat exchanger 82, the second dual-channel heat exchanger 83, and the third dual-channel heat exchanger 84 are preferably shell-and-tube heat exchangers so as to be able to withstand the pressure of the high-pressure refrigerant. The first and second throttles 981, 982 may each be an electronic expansion valve. The outdoor heat exchanger 85 and the first indoor heat exchanger 87 are air-cooled heat exchangers, such as microchannel heat exchangers, formed by combining microchannel flat tubes, headers, and fins. The low-temperature radiator 86 and the second indoor heat exchanger 88 are also air-cooled heat exchangers, in which the flat tubes may be O-tubes, and may not adopt a microchannel flat tube structure. The first water pump 89, the second water pump 901 and the third water pump 902 can be electronic water pumps, and control is more accurate.

The first dual-flow-channel heat exchanger 82 includes a first flow channel 821 and a second flow channel 822, the second dual-flow-channel heat exchanger 83 includes a third flow channel 831 and a fourth flow channel 832, and the third dual-flow-channel heat exchanger 84 includes a fifth flow channel 841 and a sixth flow channel 842. The four-way valve 71 includes a first communication hole 711, a second communication hole 712, a third communication hole 713, and a fourth communication hole 714. The four-way water valve 99 includes a first water port 991, a second water port 992, a third water port 993, and a fourth water port 994. The first three-way water valve 91 includes a first port 911, a second port 912, and a third port 913, and the second three-way water valve 92 includes a first interface 921, a second interface 922, and a third interface 923. The expansion valve 72 includes an electronic expansion valve 721 and a shutoff valve 722.

As shown in fig. 22, the thermal management system 80 is in a passenger compartment cooling mode, where the direction of the arrows is the refrigerant flow direction. The first water pump 89 is closed, the first communication port 711 and the second communication port 712 of the four-way valve 71 are communicated with each other, the shutoff valve 722 is opened, and the electronic expansion valve 721 is closed. The first compressor 81 compresses the refrigerant into a high-temperature high-pressure gaseous refrigerant, the gaseous refrigerant enters the first flow passage 821 of the first dual-flow-passage heat exchanger 82 through the connecting pipeline, at this time, the first water pump 89 is turned off, the cooling liquid in the second flow passage 822 does not exchange heat with the refrigerant in the first flow passage 821, the gaseous refrigerant enters the outdoor heat exchanger 85 through the first communication port 711 and the second communication port 712 of the four-way valve 71 of the gas-liquid separation device 100, the fan 96 blows cooling air to the outside of the outdoor heat exchanger 85 to cool the high-temperature high-pressure refrigerant in the outdoor heat exchanger 85, the cooling air flows to the first throttle valve 981 through the stop valve 722, the refrigerant is throttled into a low-temperature low-pressure refrigerant by the first throttle valve 981 to enter the first indoor heat exchanger 87, the blower in the air-conditioning box 95 introduces air into the first indoor heat exchanger 87, the low-temperature low-pressure refrigerant in the first indoor heat exchanger 87 absorbs heat exchanger 95 to cool the air in the air-conditioning box 95, and then the cold air enters the passenger cavity through the air conditioning pipeline, thereby realizing the refrigeration of the passenger cavity. The refrigerant of the first indoor heat exchanger 87 further flows into the gas-liquid separator 97 through the second refrigerant inlet 22 to separate the gaseous refrigerant from the liquid refrigerant, and the liquid refrigerant stored in the cylinder 11 returns to the compressor 81 through the refrigerant outlet 20 to complete one cycle.

As shown in fig. 23, the thermal management system 80 is in the passenger compartment heating mode, where the direction of the arrow is the refrigerant flow direction. The first water pump 89 is opened, the first valve port 911 and the second valve port 912 of the first three-way water valve 91 communicate with each other, the first communication port 711 and the fourth communication port 714 of the four-way valve 71 communicate with each other, the second communication port 712 and the third communication port 713 of the four-way valve 71 communicate with each other, the shutoff valve 722 is closed, and the electronic expansion valve 721 is opened and in the throttle state. The first compressor 81 compresses refrigerant into high-temperature and high-pressure gaseous refrigerant, the gaseous refrigerant enters the first flow passage 821 of the first dual-flow-passage heat exchanger 82 through the connecting pipeline, at the moment, the first water pump 89 is opened, the cooling liquid in the second flow passage 822 exchanges heat with the refrigerant in the first flow passage 821, the cooling liquid in the second flow passage 822 is heated, the first water pump 89 drives the cooling liquid to pass through the first valve port 911 and the second valve port 912 of the first three-way water valve 91 and enter the second indoor heat exchanger 88, the blower in the air conditioning box 95 introduces air into the second indoor heat exchanger 88, the heat of the high-temperature cooling liquid in the second indoor heat exchanger 88 heats the air in the air conditioning box 95, and then the hot air enters the passenger cavity through the air conditioning pipeline, so that the heating of the passenger cavity is realized.

The refrigerant in the first flow passage 821 passes through the first communication port 711 and the fourth communication port 714 of the four-way valve 71 of the gas-liquid separation device 100 to the electronic expansion valve 721, the electronic expansion valve 721 throttles and reduces the pressure of the refrigerant, the low-temperature and low-pressure refrigerant enters the outdoor heat exchanger 85, the fan 96 blows air to the outside of the outdoor heat exchanger 85, the low temperature and low pressure in the outdoor heat exchanger 85 absorbs heat in air, the low temperature and low pressure refrigerant passes through the second communication port 712 and the third communication port 713 of the four-way valve 71 to enter the first refrigerant inlet 21 of the gas-liquid separation device 100 and further flows into the gas-liquid separator 97 to realize separation of the gas refrigerant and the liquid refrigerant, and the liquid refrigerant stored in the cylinder 11 returns to the compressor 81 through the refrigerant outlet 20 to complete a cycle.

As shown in fig. 24, in order to operate the thermal management system 80 in the passenger compartment cooling and battery and motor cooling mode, the first water pump 89 is turned off, the second water pump 901, the third water pump 902, and the second throttle 982 are turned on, the second throttle 982 is in the throttle mode, the first water port 991 and the second water port 992 of the four-way water valve 99 are communicated, and the third water port 993 and the fourth water port 994 of the four-way water valve 99 are communicated. The refrigerant in the third flow passage 831 is throttled by the second throttle valve 982 to cool the cooling liquid in the fourth flow passage 832, and the second water pump 901 drives the cooling liquid to circularly flow in the fourth flow passage 832, so that the heat dissipation and the cooling of the battery are realized. The third water pump 902 drives the coolant to flow through the motor heat exchanger 94 to absorb heat from the motor and to the low temperature radiator 86 to dissipate the heat. The four-way water valve 99 is used for realizing that the battery cooling liquid circulation loop and the motor cooling liquid circulation loop are mutually independent, namely the two cooling liquid loops are arranged in parallel and can independently dissipate heat.

As shown in fig. 25, in order to enable the thermal management system 80 to operate in the passenger compartment cooling mode while cooling the battery and the motor, the second water pump 90 and the third water pump 902 are opened, the second throttle valve 982 is closed, the first water port 991 and the fourth water port 994 of the four-way water valve 99 are communicated, the second water port 992 and the third water port 993 of the four-way water valve 99 are communicated, and the first port 921 and the second port 922 of the second three-way water valve 92 are communicated. The third water pump 902 and the second water pump 901 drive the coolant to flow through the motor heat exchanger 94, the battery heat exchanger 93 and the fourth flow channel 832 of the second dual-flow-channel heat exchanger 83 to cool the coolant low-temperature radiator 86, thereby dissipating heat of the motor and the battery through the low-temperature radiator 86 to dissipate the heat of the motor and the battery. The four-way water valve 99 is used for realizing that the battery cooling liquid circulation loop and the motor cooling liquid circulation loop are arranged in series. The heat loss of the refrigerant is reduced, and the energy efficiency ratio of the thermal management system 80 is improved.

As shown in fig. 26, in order to enable the thermal management system 80 to be in the passenger compartment cooling and battery and motor cooling operation mode, the second water pump 901 and the third water pump 902 are opened, the second throttle valve 982 is in the throttle mode, the first water port 991 and the fourth water port 994 of the four-way water valve 99 are communicated, the second water port 992 and the third water port 993 of the four-way water valve 99 are communicated, and the first port 921 and the third port 923 of the second three-way water valve 92 are communicated. The third water pump 902 and the second water pump 901 drive the cooling liquid to flow through the motor heat exchanger 94, the battery heat exchanger 93 and the fourth runner 832 of the second dual-runner heat exchanger 83 to absorb the heat of the motor and the battery and then flow to the fourth runner 832 of the second dual-runner heat exchanger 83, and the refrigerant in the third runner 831 throttles by the second throttle valve 982 and then cools the cooling liquid in the fourth runner 832, so that the heat of the battery and the motor is dissipated and cooled.

As shown in fig. 27, in order to set the thermal management system in the working mode of heating the passenger cavity and recovering the waste heat, the second water pump 901 and the third water pump 902 are opened, the second throttle valve 982 is set in the throttling mode, the first water port 991 and the fourth water port 994 of the four-way water valve 99 are communicated, and the second water port 992 and the third water port 993 of the four-way water valve 99 are communicated. The cooling liquid loops of the motor heat exchanger 94 and the battery heat exchanger 93 can be connected in series through a four-way water valve 99, the heat of the motor and the battery can be recovered to a refrigerant system through the second double-flow-channel heat exchanger 83, or the heat of the motor and the battery can be directly recovered to the cooling liquid of the passenger through the third double-flow-channel heat exchanger 84. The parallel arrangement of the motor heat exchanger 94 and the battery heat exchanger 93 can also be realized by switching the four-way water valve 99, so that the quick heat dissipation of the motor and the heat recovery of the battery can be realized. A PTC electric heater may be added to the coolant loop of the battery heat exchanger 93, so that when the temperature of the battery is low, the battery can be heated to a temperature suitable for operation by the electric heater.

The above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, and the present application should be understood by those skilled in the art based on the detailed description of the present application with reference to the above embodiments, but those skilled in the art should understand that the present application can be modified or substituted equally by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present application should be covered by the claims of the present application.

Claims (10)

1. A gas-liquid separation apparatus, comprising: the umbrella comprises a shell, an umbrella cap and a catheter, wherein the shell is provided with an inner cavity, the umbrella cap is at least partially positioned in the inner cavity, and the catheter is at least partially positioned in the inner cavity; the shell comprises a cylinder body and a sealing cover connected with the cylinder body, and the sealing cover is arranged at one end of the gas-liquid separation device in the height direction;

the sealing cover is provided with a refrigerant inlet and a refrigerant outlet, the umbrella cap comprises a separating plate and a peripheral wall part extending from the peripheral part of the separating plate along the direction far away from the refrigerant inlet, the separating plate is provided with a part of area facing the refrigerant inlet, and a gap is formed between the peripheral wall part and the shell;

the pipe comprises a first port part, a second port part and a pipeline for communicating the first port part with the second port part, the separation plate is positioned between the first port part and a refrigerant inlet, the refrigerant inlet is communicated with an inner cavity, the inner cavity is communicated with the first port part, and the second port part is communicated with a refrigerant outlet;

the separating plate comprises a convex part which is convex relative to the peripheral wall part towards the direction close to the refrigerant inlet, the convex part is arranged on a section of the convex part along the height direction, the convex part comprises a convex vertex and a side surface line which is used for connecting the convex vertex to the peripheral wall part, and the side surface line is obliquely arranged relative to the height direction;

the gas-liquid separation device comprises a connecting pipe, one end of the connecting pipe is fixedly connected with the sealing cover, a gap is formed between the other end of the connecting pipe and the separation plate, a pipe cavity of the connecting pipe is communicated with the first refrigerant inlet, the minimum distance between the connecting pipe and the separation plate is D, and D is larger than or equal to 3mm and smaller than or equal to 5 mm.

2. The gas-liquid separation device according to claim 1, wherein: the first port portion is located below the separation plate in the height direction of the gas-liquid separation device, and the top end surface of the first port portion is higher than the bottom end of the peripheral wall portion;

the umbrella cap is characterized in that the umbrella cap is arranged on a section in the height direction, the peripheral wall portion comprises a straight line section and an arc line section connected between the straight line section and a side surface line, and an included angle between the side surface line and the height direction is an acute angle or an obtuse angle.

3. The gas-liquid separation device according to claim 1, wherein: the umbrella cap is arranged on a cross section in the height direction, the peripheral wall part comprises a first straight line, a second straight line, a first arc line and a second arc line, the first straight line and the second straight line are arranged at intervals, and the first straight line and the second straight line extend in the height direction;

on one section of the umbrella cap in the height direction, the side line comprises a first oblique line and a second oblique line, the first arc line is connected between the first oblique line and the first straight line, and the second arc line is connected between the second oblique line and the second straight line;

the length of the first oblique line is smaller than that of the second oblique line, and an included angle between the first oblique line and the height direction is smaller than that between the second oblique line and the height direction.

4. The gas-liquid separation device according to claim 1, wherein: the central axis of the refrigerant inlet passes through the convex vertex of the convex part, and the convex part is in a cone shape.

5. The gas-liquid separation device according to claim 3, wherein: the umbrella cap is provided with a cavity between the separating plate and the peripheral wall, at least part of the first port is located in the cavity, the umbrella cap is arranged on one section in the height direction and comprises a third straight line, a fourth straight line and a fifth straight line, the third straight line, the fourth straight line and the fifth straight line face the cavity, the third straight line and the first straight line are arranged in parallel, the fourth straight line and the second straight line are arranged in parallel, and the fifth straight line is perpendicular to the third straight line and the third straight line.

6. The gas-liquid separation device according to claim 5, wherein: the parachute cap is on direction of height's cross-section, the parachute cap includes third pitch arc and the fourth pitch arc of facing the cavity, the third pitch arc connect in between third straight line and the fifth straight line, the fourth pitch arc is connected between fourth straight line and the fifth straight line, the arc length of third pitch arc is less than the arc length of first pitch arc, the arc length of fourth pitch arc is less than the arc of second pitch arc.

7. The gas-liquid separation device according to claim 1, wherein: in a cross section of the umbrella cap in the height direction, a minimum thickness of the separation plate in the height direction is larger than a maximum thickness of the peripheral wall portion in a transverse direction, and the transverse direction is perpendicular to the height direction.

8. The gas-liquid separation device according to claim 1, wherein: the cylinder body comprises a cylinder wall and a cylinder cavity, the sealing cover comprises an outer peripheral wall and an inner wall, the outer peripheral wall of the sealing cover is fixedly connected with the cylinder wall of the cylinder body, and the sealing cover is arranged at the connection position in a sealing way;

the umbrella cap is fixed on the inner wall of the sealing cover, and the guide pipe is fixed on the inner wall of the sealing cover.

9. The gas-liquid separation device according to claim 1, wherein: the cover is provided with a concave cavity, the umbrella cap is contained in the concave cavity, the inner wall of the cover comprises a first wall surface surrounding a peripheral wall part and a second wall surface facing the separation plate, and a gap is formed between the peripheral wall part and the first wall surface;

the second wall surface and the separating plate are provided with spacing cavities, the spacing cavities are communicated with the cylinder cavity through gaps between the peripheral wall part and the first wall surface, the refrigerant outlet penetrates through the inner wall of the sealing cover, the second port part of the guide pipe is inserted into the refrigerant outlet, and the outer wall surface of the second port part is welded and fixed with the inner wall surface of the refrigerant outlet.

10. The gas-liquid separation device according to claim 9, wherein: the sealing cover is provided with a cylinder protruding out of the second wall surface, the umbrella cap is provided with a through hole corresponding to the cylinder, the cylinder is inserted into the through hole, and the wall of the through hole is welded and fixed with the wall of the cylinder;

the peripheral wall portion of the umbrella cap comprises an arc surface and an avoiding groove which is recessed inwards relative to the arc surface, the sealing cover comprises a connecting portion which is located in the avoiding groove, a portion of the refrigerant outlet is located at the connecting portion, and the guide pipe is fixedly connected to the connecting portion.

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