CN220322145U - Rectifier for heat exchange system, vehicle heat exchange system and vehicle - Google Patents
Rectifier for heat exchange system, vehicle heat exchange system and vehicle Download PDFInfo
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- CN220322145U CN220322145U CN202321999966.1U CN202321999966U CN220322145U CN 220322145 U CN220322145 U CN 220322145U CN 202321999966 U CN202321999966 U CN 202321999966U CN 220322145 U CN220322145 U CN 220322145U
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- 239000003507 refrigerant Substances 0.000 claims abstract description 247
- 239000007788 liquid Substances 0.000 claims abstract description 94
- 238000005192 partition Methods 0.000 claims description 15
- 239000000178 monomer Substances 0.000 claims description 9
- 230000005514 two-phase flow Effects 0.000 abstract description 35
- 238000009826 distribution Methods 0.000 abstract description 21
- 238000000926 separation method Methods 0.000 abstract description 8
- 239000007791 liquid phase Substances 0.000 abstract 1
- 239000012071 phase Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- 238000003754 machining Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to the technical field of heat exchangers and discloses a rectifier for a heat exchange system, a vehicle heat exchange system and a vehicle, wherein the rectifier for the heat exchange system comprises a pipe body, and the pipe body is communicated with a refrigerant pipe; the rectification structure is arranged in the pipe body, the rectification structure is arranged opposite to the flow direction of the pipe body in a head-on manner, a hollow flow channel positioned in the middle of the pipe body is formed in the middle of the rectification structure, annular grooves distributed around the hollow flow channel are formed in the periphery of the rectification structure, and the gaseous refrigerant flowing to the hollow flow channel drives the liquid refrigerant flowing to the annular grooves to flow out of the rectification structure. According to the rectifier for the heat exchange system, different flow tracks of the gas-liquid two-phase flow refrigerant are met through the hollow flow passage and the annular groove, so that the gas-liquid two-phase flow refrigerant can be converged at the hollow flow passage of the rectification structure, the purpose of mixing the gas-liquid two-phase flow refrigerant is achieved, and the phenomenon of uneven refrigerant distribution caused by separation of the gas-phase refrigerant and the liquid-phase refrigerant is reduced.
Description
Technical Field
The utility model relates to the technical field of heat exchangers, in particular to a rectifier for a heat exchange system, a vehicle heat exchange system and a vehicle.
Background
The heat exchange system generally drives the refrigerant to flow through the heat pump as a power component, and takes the heat exchange system for the vehicle for adjusting the temperature of the battery for the vehicle as an example, compared with a battery liquid cooling scheme, the heat exchange system for the vehicle can effectively avoid the addition of an intermediate heat exchange medium, and reduces the heat loss in the secondary heat exchange process of the refrigerant and the secondary refrigerant. With further improvement of capacity and power of the vehicle battery, the thermal load of the vehicle battery during operation is gradually increased, and a more efficient and effective heat exchange scheme with higher heat exchange efficiency is needed.
However, in the actual use process of the heat exchange system, a gas-liquid two-phase flow refrigerant generally exists in a refrigerant pipe of the heat exchange system, and the gas-liquid two-phase flow refrigerant can be separated from a liquid refrigerant in the refrigerant pipe, so that the refrigerant in the refrigerant pipe can be unevenly distributed at a heat exchange terminal, and the heat exchange effect and the heat exchange balance of the heat exchange system are affected.
Disclosure of Invention
In view of the above, the present utility model provides a rectifier for a heat exchange system to solve the problem of uneven refrigerant distribution caused by separation of a gaseous refrigerant and a liquid refrigerant.
In a first aspect, the present utility model provides a rectifier for a heat exchange system, the rectifier being connected in series to a refrigerant line of the heat exchange system, the rectifier comprising: the pipe body is communicated with the refrigerant pipe; the rectification structure is arranged in the pipe body, the rectification structure is arranged opposite to the flow direction of the pipe body in a head-on manner, a hollow flow channel positioned in the middle of the pipe body is formed in the middle of the rectification structure, annular grooves distributed around the hollow flow channel are formed in the periphery of the rectification structure, and the gaseous refrigerant flowing to the hollow flow channel drives the liquid refrigerant flowing to the annular grooves to flow out of the rectification structure.
According to the rectifier for the heat exchange system, different flow tracks of the gas-liquid two-phase refrigerant are met through the hollow flow passage and the annular groove, so that the gas-liquid two-phase refrigerant can be converged at the hollow flow passage of the rectification structure, the purpose of mixing the gas-liquid two-phase refrigerant is achieved, and the phenomenon of uneven refrigerant distribution caused by separation of the gas-liquid refrigerant is reduced.
Specifically, under the working conditions of jolt or inclined placement of a refrigerant pipe and the like, the gaseous refrigerant and the liquid refrigerant in the gas-liquid two-phase flow refrigerant can be separated, so that different flow tracks are formed, the gaseous refrigerant and the liquid refrigerant with different flow tracks flow into the rectifier, the liquid refrigerant is radially separated from the gaseous refrigerant due to the action of gravity or eccentricity, the gaseous refrigerant is distributed in the middle, the liquid refrigerant surrounds the periphery of the gaseous refrigerant, the annular groove in the rectifier can enable the liquid refrigerant to circularly flow along the circumferential direction, a hollow runner in the rectifier provides a channel for the gaseous refrigerant, the speed of the gaseous refrigerant increases after flowing through the hollow runner, and the liquid refrigerant overflowed from the annular groove is driven to uniformly flow in the pipe body.
In an alternative embodiment, the rectifying structure comprises a partition plate arranged opposite to the flow direction of the pipe body in a facing manner, a boss is arranged in the middle of the flow facing surface of the partition plate, a hollow flow passage is formed in the boss, and annular grooves distributed around the hollow flow passage are formed by the boss, the partition plate and the pipe body.
In an alternative embodiment, the baffle, boss and tube are provided as an integrally formed structure. Through setting up baffle, boss and body as integrated into one piece structure, can improve the manufacturing efficiency of rectifier, reduce the manufacturing cost of rectifier.
In an alternative embodiment, the inlet end of the tube body forms an inlet communicated with the refrigerant tube, the inner diameter of the inlet is R, the circumference of the central line of the annular groove is L, and pi R > L is more than or equal to 1/4R. By setting pi R > L to be more than or equal to 1/4R, quantitative liquid refrigerant can be accumulated at the annular groove, and the phenomenon that the liquid refrigerant is precipitated and directly flows to the hollow flow passage is reduced.
In an alternative embodiment, the inlet end of the tube body forms an inlet communicated with the refrigerant tube, the inner diameter of the inlet is R, and the inner diameter of the hollow flow passage is R, wherein R > R is more than or equal to 1/3R. By setting R > R to be more than or equal to 1/3R, not only the smoothness of the circulation of the gaseous refrigerant but also the smoothness of the circulation of the liquid refrigerant are considered.
In an alternative embodiment, the inlet end of the tube body forms an inlet communicated with the refrigerant tube, and the distance from the boss to the inlet is S 1 S is less than or equal to 30mm. The baffle and the pipe body can be integrally cast and formed, and the boss, the hollow runner and the annular groove can be formed in a machining mode by reasonably arranging S 1 The manufacturing difficulty of the boss can be reduced.
In an alternative embodiment, the outlet end of the tube body forms an outlet communicated with the refrigerant tube, and the nearest distance from the hollow runner to the inlet is S 2 ，S 2 Less than or equal to 30mm. The baffle and the pipe body can be integrally cast and formed, and the boss, the hollow runner and the annular groove can be formed in a machining mode by reasonably arranging S 2 The size of the hollow runner can be reduced.
In a second aspect, the present utility model also provides a heat exchange system for a vehicle, the heat exchange system for a vehicle comprising: the air conditioner comprises a compressor, an expansion valve, a distributor and a plurality of branch refrigerant pipes which are connected in sequence; according to the rectifier for the heat exchange system of the first aspect, the rectifier is provided between the expansion valve and the distributor.
In an alternative embodiment, the heat exchange system for the vehicle further comprises an intermediate heat exchanger, wherein the intermediate heat exchanger is arranged between the compressor and the expansion valve, and the refrigerant in the compressor flows to the intermediate heat exchanger for preliminary heat exchange. The primary heat exchange of the intermediate heat exchanger can keep the refrigerant flowing to the distributor to be a gas-liquid two-phase flow, so that the gaseous refrigerant and the liquid refrigerant can be uniformly distributed into each branch refrigerant pipe.
In a third aspect, the present utility model also provides a vehicle comprising: a vehicle body; the battery pack is arranged on the vehicle body and comprises a plurality of battery monomers; according to the heat exchange system for the vehicle of the second aspect, the heat exchange system for the vehicle is provided with a plurality of branch refrigerant pipes, and the plurality of branch refrigerant pipes are in one-to-one correspondence with the plurality of battery cells.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic illustration of the structure of a rectifier and a distributor in a heat exchange system for a vehicle; (no bend between the distributor and the expansion valve)
FIG. 2 is a cross-sectional view of the rectifier shown in FIG. 1;
FIG. 3 is a block diagram of the rectifier and distributor of FIG. 1 in an inclined state; (no bend between the distributor and the expansion valve)
FIG. 4 is a graph of the volumetric ratio of two outlet gases of a dispenser over time without an elbow and without a rectifier between the dispenser and the expansion valve;
FIG. 5 is a graph showing the change in volume ratio of two outlet gases of a dispenser over time with no elbow but a rectifying structure between the dispenser and the expansion valve;
FIG. 6 is a schematic diagram of the structure of a rectifier and a distributor in a heat exchange system for a vehicle; (an elbow is arranged between the distributor and the expansion valve);
FIG. 7 is a block diagram of the rectifier and distributor of FIG. 6 in an inclined state; (an elbow is arranged between the distributor and the expansion valve);
FIG. 8 is a graph showing the change of the volume ratio of two outlet gases of the distributor over time with a bent pipe, a rectifying structure and a pipeline not inclined between the distributor and the expansion valve;
FIG. 9 is a graph showing the change in volume ratio of two outlet gases of a distributor over time with a bent pipe, a rectifying structure, and a pipe inclined between the distributor and the expansion valve.
Reference numerals illustrate:
10. a refrigerant pipe; 11. bending the pipe;
20. a rectifier; 21. a tube body; 22. a rectifying structure; 221. a partition plate; 222. a boss; 223. a hollow flow passage; 224. an annular groove;
30. a dispenser;
40. and a branched refrigerant pipe.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The refrigerant pipe of the heat exchange system generally has gas-liquid two-phase flow refrigerant, and the gas-liquid two-phase flow refrigerant also has the phenomenon of separating gaseous refrigerant from liquid refrigerant in the refrigerant pipe, so that the refrigerant in the refrigerant pipe has the phenomenon of uneven distribution at a heat exchange terminal.
Taking a vehicle heat exchange system as an example, the vehicle heat exchange system can adjust the temperature of a power battery of a vehicle, a plurality of branch refrigerant pipes are often required to be used in parallel in the heat exchange system of one power battery, a distributor of the heat exchange system is arranged at the downstream of an expansion valve of the heat exchange system, and because an outlet of the expansion valve is a gas-liquid two-phase flow refrigerant, the traditional distributor is easy to separate under gravity due to jolt of the vehicle or inclined placement of refrigerant pipes in the use process of the vehicle heat exchange system, so that the distribution uniformity of the refrigerant in each branch refrigerant pipe is difficult to be ensured, thereby causing too little refrigerant quantity in some branch refrigerant pipes, leading to rapid overheating of the refrigerant, leading to higher temperature of a battery monomer in thermal contact with the branch refrigerant pipes than other battery monomers, and finally leading to poor temperature consistency among the battery monomers.
In order to solve the problem that the refrigerant is unevenly distributed among a plurality of branch refrigerant pipes due to the separation of gaseous refrigerant and liquid refrigerant in the refrigerant pipes, the rectifier for the heat exchange system provided by the utility model meets different flow tracks of the gas-liquid two-phase refrigerant through the hollow flow channel and the annular groove, so that the gas-liquid two-phase refrigerant can be converged at the hollow flow channel of the rectifying structure, the purpose of mixing the gas-liquid two-phase refrigerant is achieved, and the phenomenon of uneven refrigerant distribution caused by the separation of the gaseous refrigerant and the liquid refrigerant is reduced.
An embodiment of the present utility model is described below with reference to fig. 1 to 9.
According to an embodiment of the present utility model, as shown in fig. 1 to 3, in one aspect, there is provided a rectifier 20 for a heat exchange system, the rectifier 20 is connected in series to a refrigerant pipe 10 of the heat exchange system, the rectifier 20 includes a pipe body 21 and a rectifying structure 22, the pipe body 21 is connected to the refrigerant pipe 10, the rectifying structure 22 is disposed inside the pipe body 21, the rectifying structure 22 is disposed facing a flow direction of the pipe body 21, a hollow flow passage 223 is formed in a middle portion of the rectifying structure 22 and is located in a middle portion of the pipe body 21, annular grooves 224 distributed around the hollow flow passage 223 are formed around a periphery of the rectifying structure 22, and a gaseous refrigerant flowing into the hollow flow passage 223 drives a liquid refrigerant flowing into the annular grooves 224 to flow out of the rectifying structure 22.
In this embodiment, the rectifier 20 for a heat exchange system provided in this embodiment meets different flow tracks of the gas-liquid two-phase flow refrigerant through the hollow flow channel 223 and the annular groove 224, so that the gas-liquid two-phase refrigerant can be converged at the hollow flow channel 223 of the rectifying structure 22, thereby achieving the purpose of mixing the gas-liquid two-phase refrigerant, and reducing the phenomenon of uneven refrigerant distribution caused by separation of the gas refrigerant and the liquid refrigerant.
Specifically, in the case that the heat exchange system is provided with an expansion valve and a distributor 30, the rectifier 20 is connected in series with the refrigerant pipe 10 between the expansion valve and the distributor 30, the inlet end of the rectifier 20 is communicated with the refrigerant pipe 10 at the downstream of the expansion valve, the outlet end of the rectifier 20 is communicated with the distributor 30, the refrigerant flowing from the expansion valve is a gas-liquid two-phase flow refrigerant, under the working conditions of bumping of a vehicle, etc., the gaseous refrigerant and the liquid refrigerant in the gas-liquid two-phase flow refrigerant can be separated, so that different flow tracks are provided, the gaseous refrigerant and the liquid refrigerant in the different flow tracks flow into the rectifier 20, the liquid refrigerant and the gaseous refrigerant are radially separated due to the action of gravity or eccentricity, the gaseous refrigerant is distributed in the middle part, the liquid refrigerant surrounds the periphery of the gaseous refrigerant, the annular groove 224 in the rectifier 20 can enable the liquid refrigerant to flow in the circumferential direction, the hollow channel 223 in the rectifier 20 provides a channel for the gaseous refrigerant, and the velocity of the gaseous refrigerant increases after flowing through the hollow channel 223, so that the liquid refrigerant overflows from the annular groove 224 is driven to flow uniformly in the interior of the pipe 21.
It should be noted that, the embodiment of the present application is not limited to the specific structure of the rectifying structure 22, because various embodiments of the rectifying structure 22 are disclosed herein, for example, the rectifying structure 22 includes a tube-in-tube structure, a partition 221 structure, or a guiding valve structure, and the embodiments can achieve the effect of rectifying the gaseous refrigerant and the liquid refrigerant, and all belong to the protection scope of the present application, and the specific structure of the rectifying structure 22 is described below through the preferred embodiments of the present application.
In an alternative embodiment, as shown in fig. 1 to 3, the rectifying structure 22 includes a partition plate 221 disposed facing the flow direction of the pipe 21, a boss 222 is disposed in the middle of the flow facing surface of the partition plate 221, a hollow flow passage 223 is formed inside the boss 222, and annular grooves 224 distributed around the hollow flow passage 223 are formed by the boss 222, the partition plate 221 and the pipe 21.
In this embodiment, the partition 221 is used to block the liquid refrigerant from flowing along the inner wall of the refrigerant pipe 10, and redirect the liquid refrigerant to the middle of the refrigerant pipe 10 for mixing with the gaseous refrigerant, so that the refrigerant flows in a gas-liquid two-phase flow state, thereby reducing the phenomenon of maldistribution caused by gas-liquid separation of the gas-liquid two-phase flow refrigerant.
Specifically, the material of the boss 222, the spacer 221, and the pipe body 21 includes copper, aluminum, and the like.
In an alternative embodiment, as shown in fig. 1 to 3, the partition 221, the boss 222, and the pipe body 21 are provided as an integrally formed structure.
In the present embodiment, by providing the spacer 221, the boss 222, and the pipe body 21 as an integrally molded structure, the manufacturing efficiency of the rectifier 20 can be improved, and the manufacturing cost of the rectifier 20 can be reduced.
Specifically, the spacer 221 and the pipe body 21 are integrally injection molded, and then the boss 222, the hollow flow passage 223, and the annular groove 224 are machined by machining.
In an alternative embodiment, as shown in FIGS. 1-3, the inlet end of the tube 21 forms an inlet communicating with the refrigerant tube 10, the inlet having an inner diameter R, the annular groove 224 having a centerline circumference L, pi R > L being 1/4R.
In the embodiment, by setting pi R > L to be equal to or greater than 1/4R, a certain amount of liquid refrigerant can be accumulated at the annular groove 224, and the phenomenon that the liquid refrigerant is precipitated and directly flows to the hollow flow passage 223 is reduced.
Specifically, the annular groove 224 provides an annular circulation channel for the liquid refrigerant, so that the liquid refrigerant can perform centrifugal rotation movement at the annular groove 224, and when the liquid refrigerant accumulated at the annular groove 224 reaches a certain amount, the liquid refrigerant overflows from the annular groove 224, so that the gaseous refrigerant at the hollow runner 223 can drive the overflowed liquid refrigerant to flow together, and the purpose of uniform flow of the refrigerant is achieved.
In an alternative embodiment, as shown in FIGS. 1 to 3, the inlet end of the tube body 21 forms an inlet communicating with the refrigerant tube 10, the inlet having an inner diameter R, and the hollow flow passage 223 having an inner diameter R, R > r.gtoreq.1/3R.
In the embodiment, by setting R > R to be equal to or greater than 1/3R, not only the smoothness of the circulation of the gaseous refrigerant but also the smoothness of the circulation of the liquid refrigerant are considered.
Specifically, the hollow flow channel 223 provides a channel for the gas-liquid two-phase flow refrigerant, so that the gaseous refrigerant at the hollow flow channel 223 can drive the overflowed liquid refrigerant to flow together, and the circulation efficiency of the gas-liquid two-phase flow refrigerant is improved.
In an alternative embodiment, as shown in fig. 1 to 3, the inlet end of the tube body 21 forms an inlet communicating with the refrigerant tube 10, and the distance from the boss 222 to the inlet is S 1 ，S≤30mm。
In the present embodiment, the partition 221 and the pipe body 21 may be provided as an integral casting molding, and the boss 222, the hollow runner 223, and the annular groove 224 may be formed by machining, by reasonably providing S 1 Can reduce the difficulty in manufacturing the boss 222.
Specifically, in the process of machining the boss 222, the cutter needs to extend from the inlet of the pipe body 21 to the boss 222 machined in the pipe body 21, and if the distance from the inlet of the pipe body 21 to the boss 222 is too large, not only is a longer cutter needed, but also the machining difficulty of the cutter is increased.
In an alternative embodiment, as shown in fig. 1 to 3, the outlet end of the tube body 21 forms an outlet communicating with the refrigerant tube 10, and the closest distance between the hollow flow passage 223 and the outlet is S 2 ，S 2 ≤30mm。
In the present embodiment, the partition 221 and the pipe body 21 may be provided as an integral casting molding, and the boss 222, the hollow runner 223, and the annular groove 224 may be formed by machining, by reasonably providing S 2 Can reduce the difficulty in manufacturing the hollow flow passage 223.
Specifically, in the process of processing the hollow flow passage 223, it is necessary to extend the cutter from the outlet of the pipe body 21 to the inside of the pipe body 21 to process the hollow flow passage 223, and if the distance from the outlet of the pipe body 21 to the hollow flow passage 223 is too large, not only a longer cutter is required, but also the processing difficulty of the cutter is increased.
It can be understood by those skilled in the art that, in the related art, the refrigerant pipe 10 is provided with the bent pipe 11 section or the refrigerant pipe 10 is in an inclined state, which has a great influence on the distribution uniformity of the gas-liquid two-phase flow refrigerant, however, by setting the rectifier 20 in the embodiment of the present application, the distribution uniformity of the gas-liquid two-phase flow refrigerant can be improved for the refrigerant pipes 10 with different shapes and placement postures.
The technical effects of the rectifier 20 of the embodiment of the present application are described below by various working conditions of whether the refrigerant pipe 10 is provided with the bent pipe 11 section or whether the refrigerant pipe 10 is in an inclined state.
1) No bend 11 is provided between the expansion valve and the distributor 30
As shown in fig. 1 and 3, the refrigerant pipe 10 between the expansion valve and the distributor 30 is not provided with the bent pipe 11 section, and the rectifier 20 is provided between the expansion valve and the distributor 30, as shown in fig. 1, when the refrigerant pipe 10 is not inclined, the distribution of the refrigerant at the outlet of the expansion valve is relatively uniform, the gas-liquid two-phase flow refrigerant enters the distributor 30 in a uniformly mixed state, at this time, the distribution of the refrigerant by the distributor 30 is relatively uniform, but when the vehicle runs on a poor road condition, as shown in fig. 3, the refrigerant pipe 10 is inclined (for example, inclined by 30 °) and the gas-liquid two-phase flow refrigerant is separated from the refrigerant pipe 10 in an inclined state under the action of gravity.
Under the condition that the refrigerant pipe 10 is not provided with the rectifier 20 and the refrigerant pipe 10 is inclined, when the inflow flow rate of the gas-liquid two-phase flow refrigerant is 2.4kg/min and the dryness is 0.05, the change curves of the gas ratios of the refrigerants at the two outlets of the distributor 30 along with time are shown in fig. 4, and as can be seen from fig. 4, the gas-liquid two-phase flow refrigerant is unevenly distributed in the distributor 30, which can cause the phenomenon that the refrigerant distribution amount is uneven among different branch refrigerant pipes 40, wherein the overheat section of the branch refrigerant pipe 40 with large gas proportion is longer, the heat exchange effect is poor, the temperature of the battery monomer contacted with the branch refrigerant pipe is higher than that of other battery monomers, the temperature difference among different battery monomers is larger, and the whole service life and the use safety of the battery pack are influenced.
In the case that the refrigerant pipe 10 is provided with the rectifier 20 and the refrigerant pipe 10 is inclined, as shown in fig. 5, the change curves of the gas ratios of the refrigerants at the two outlets of the distributor 30 with time are shown in fig. 5, and as can be seen from fig. 5, the rectifier 20 can make the refrigerant distribution of each outlet of the distributor 30 relatively uniform, because the annular groove 224 in the rectifier 20 can make the liquid refrigerant flow in a circumferential direction in a ring shape, the hollow flow channel 223 in the rectifier 20 provides a channel for the gaseous refrigerant, and after the gaseous refrigerant flows through the hollow flow channel 223, the speed is increased to drive the liquid refrigerant overflowing from the annular groove 224 to flow uniformly in the pipe body 21, so as to achieve the effect of uniform gas-liquid distribution.
2) An elbow 11 is arranged between the expansion valve and the distributor 30
As shown in fig. 6 and 7, an elbow 11 is disposed between the expansion valve and the distributor 30, and the refrigerant at the outlet of the expansion valve is distributed uniformly, but after the gas-liquid two-phase flow refrigerant flows through the elbow 11, the liquid refrigerant is "thrown" to one side far away from the center of the refrigerant pipe 10 due to the density much higher than the gas refrigerant, and then flows along the sidewall of the refrigerant pipe 10 to the distributor 30 due to the gravity, so that the refrigerant is distributed unevenly among the branch refrigerant pipes 40. According to the embodiment of the application, the rectifier 20 is arranged at the upstream of the distributor 30, the annular groove 224 of the rectifier 20 can enable liquid refrigerant caused by gravity to flow in an adherence manner, the annular flow of the liquid refrigerant is adjusted, the gaseous refrigerant can carry the annular flowing liquid refrigerant to be uniformly distributed near the central axis of the rectifier 20, and the distribution uniformity of the gas-liquid two-phase flow refrigerant in the distributor 30 is greatly improved.
Specifically, in the case where the refrigerant pipe 10 is provided with the rectifier 20 and the refrigerant pipe 10 is not inclined, when the inflow rate of the refrigerant is 2.4kg/min and the dryness is 0.2, the gas ratio of the refrigerant at the two outlets of the distributor 30 changes with time, as shown in fig. 8, the distribution of the refrigerant in the gas-liquid two-phase flow is relatively uniform, and the gas-liquid separation phenomenon can be greatly reduced.
Specifically, in the case where the rectifier 20 is disposed in the refrigerant pipe 10 and the refrigerant pipe 10 is inclined, the distribution of the gas-liquid two-phase flow refrigerant is relatively uniform as shown in fig. 9 according to the change curve of the gas ratio of the refrigerant at the two outlets of the distributor 30 with time, so that the distribution uniformity of the distributor 30 to the gas-liquid two-phase flow refrigerant can be greatly improved through the cooperation of the rectifier 20 and the distributor 30.
In a second aspect, the present utility model also provides a heat exchange system for a vehicle, the heat exchange system for a vehicle comprising an air conditioner including a compressor, an expansion valve, a distributor 30, and a plurality of branched refrigerant pipes 40 connected in sequence, and a rectifier 20 for the heat exchange system according to the first aspect, the rectifier 20 being disposed between the expansion valve and the distributor 30.
In the present embodiment, the plurality of branch refrigerant pipes 40 are formed by connecting a plurality of micro channels of the heat exchange plate in parallel, and in order to uniformly distribute the gas-liquid two-phase flow refrigerant flowing out of the expansion valve among the plurality of branch refrigerant pipes 40 connected in parallel, the number of the plurality of branch refrigerant pipes 40 connected in parallel is an even number.
Specifically, the distribution mode of the plurality of branch refrigerant pipes 40 adopts a one-in-two-in-four distribution mode, wherein the rectifier 20 needs to be vertically installed, the installation position of the rectifier 20 is above the distributor 30, and no bent pipe 11 section is connected between the rectifier 20 and the distributor 30.
Further, the plurality of branch refrigerant pipes 40 are symmetrically arranged, so that the phenomenon of uneven refrigerant distribution caused by different lengths and bending angles of the branch refrigerant pipes 40 can be reduced, and the phenomenon of larger temperature difference between different battery monomers can be caused.
In an alternative embodiment, the heat exchange system for the vehicle further comprises an intermediate heat exchanger, wherein the intermediate heat exchanger is arranged between the compressor and the expansion valve, and the refrigerant in the compressor flows to the intermediate heat exchanger to perform preliminary heat exchange.
In this embodiment, the refrigerant flowing to the distributor 30 can maintain a gas-liquid two-phase flow through the preliminary heat exchange of the intermediate heat exchanger, so that the gaseous refrigerant and the liquid refrigerant can be uniformly distributed into each branch refrigerant pipe 40.
Specifically, the inlet and outlet pipelines of the refrigerant adopt the same arrangement mode, the four-way valve is an inlet of a gas-liquid two-phase flow refrigerant under a direct cooling working condition, the refrigerant entering the four-way valve flows out from the expansion valve to be in a gas-liquid two-phase flow state, and after the gas-liquid two-phase flow refrigerant passes through the rectifier 20 and the distributor 30, the gas refrigerant and the liquid refrigerant can be uniformly distributed into each micro-channel, so that the battery units at each micro-channel can meet the requirement of temperature consistency.
The four-way valve is a refrigerant inlet in a direct heating mode of the battery heat pump, and because the refrigerant directly discharged from the compressor has a large superheat degree, if the refrigerant directly flows into the four-way valve, the temperature of the battery above the inlet section of the micro-channel is higher than the temperature of other positions, therefore, the embodiment is connected into the intermediate heat exchanger before the four-way valve, so that the refrigerant entering the four-way valve is a gas-liquid two-phase flow refrigerant with the dryness between 0.9 and 1. The gas-liquid two-phase flow refrigerant enters through the four-way valve, and after passing through the rectifier 20 and the distributor 30, the gas-state refrigerant and the liquid-state refrigerant can be uniformly distributed into each micro-channel, so that the battery units at the micro-channels can meet the requirement of temperature consistency.
In a third aspect, the present utility model also provides a vehicle, the vehicle including a vehicle body, a battery pack and a vehicle heat exchange system, the battery pack being disposed on the vehicle body, the battery pack including a plurality of battery cells, the vehicle heat exchange system being the vehicle heat exchange system according to the second aspect, the vehicle heat exchange system being provided with a plurality of branch refrigerant pipes 40, the plurality of branch refrigerant pipes 40 being in one-to-one correspondence with the plurality of battery cells.
In this embodiment, the battery pack includes a case, the case is provided with a heat exchange plate for carrying a plurality of battery cells, the heat exchange plate is provided with a plurality of parallel microchannels corresponding to the plurality of battery cells one by one, a plurality of heat exchange cavities formed inside the plurality of microchannels form a plurality of branch refrigerant pipes 40, and the plurality of branch refrigerant pipes 40 exchange heat with the plurality of battery cells through the heat exchange plate.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.
Claims (10)
1. A rectifier for a heat exchange system, the rectifier being connected in series to refrigerant lines of the heat exchange system, the rectifier comprising:
the pipe body is communicated with the refrigerant pipe;
the rectifying structure is arranged in the pipe body, the rectifying structure is arranged at the head-on position relative to the flow direction of the pipe body, the middle part of the rectifying structure forms a hollow runner positioned at the middle part of the pipe body, the periphery of the rectifying structure forms annular grooves distributed around the hollow runner,
the gaseous refrigerant flowing to the hollow flow passage drives the liquid refrigerant flowing to the annular groove to flow out of the rectifying structure.
2. The rectifier for a heat exchange system according to claim 1, wherein the rectifying structure includes a partition plate disposed facing the flow direction of the tube body, a boss is provided in a middle portion of the flow facing surface of the partition plate, the boss forms the hollow flow passage inside, and the boss forms the annular groove distributed around the hollow flow passage with the partition plate and the tube body.
3. The rectifier for a heat exchange system according to claim 2, wherein the baffle, the boss, and the tube body are provided as an integrally formed structure.
4. The rectifier for a heat exchange system according to claim 1, wherein the inlet end of the tube body forms an inlet communicating with the refrigerant tube, the inlet having an inner diameter R, and the center line circumference of the annular groove having a circumference L, pi R > L being 1/4R.
5. The rectifier for a heat exchange system according to claim 2, wherein the inlet end of the tube body forms an inlet communicating with the refrigerant tube, the inlet has an inner diameter R, and the hollow flow passage has an inner diameter R, wherein R > R is 1/3R.
6. The rectifier for a heat exchange system according to claim 2, wherein the inlet end of the tube body forms an inlet communicating with the refrigerant tube, and the boss is spaced from the inlet by a distance S 1 ，S≤30mm。
7. The rectifier for a heat exchange system according to claim 1, wherein the outlet end of the tube body forms an outlet communicating with the refrigerant tube, and the closest distance from the hollow flow passage to the outlet is S 2 ，S 2 ≤30mm。
8. A vehicular heat exchange system, characterized by comprising:
the air conditioner comprises a compressor, an expansion valve, a distributor and a plurality of branch refrigerant pipes which are connected in sequence;
rectifier for a heat exchange system according to any one of claims 1 to 7, the rectifier being arranged between the expansion valve and the distributor.
9. The vehicle heat exchange system of claim 8, further comprising an intermediate heat exchanger disposed between the compressor and the expansion valve, wherein a refrigerant in the compressor flows to the intermediate heat exchanger for preliminary heat exchange.
10. A vehicle, characterized in that the vehicle comprises:
a vehicle body;
the battery pack is arranged on the vehicle body and comprises a plurality of battery monomers;
the heat exchange system for a vehicle according to claim 8 or 9, wherein the heat exchange system for a vehicle is provided with a plurality of branched refrigerant pipes, the plurality of branched refrigerant pipes being in one-to-one correspondence with the plurality of battery cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321999966.1U CN220322145U (en) | 2023-07-27 | 2023-07-27 | Rectifier for heat exchange system, vehicle heat exchange system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321999966.1U CN220322145U (en) | 2023-07-27 | 2023-07-27 | Rectifier for heat exchange system, vehicle heat exchange system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220322145U true CN220322145U (en) | 2024-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321999966.1U Active CN220322145U (en) | 2023-07-27 | 2023-07-27 | Rectifier for heat exchange system, vehicle heat exchange system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220322145U (en) |
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2023
- 2023-07-27 CN CN202321999966.1U patent/CN220322145U/en active Active
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