CN214120448U - Micro-channel heat exchanger and heat pump system - Google Patents
Micro-channel heat exchanger and heat pump system Download PDFInfo
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- CN214120448U CN214120448U CN202022265404.7U CN202022265404U CN214120448U CN 214120448 U CN214120448 U CN 214120448U CN 202022265404 U CN202022265404 U CN 202022265404U CN 214120448 U CN214120448 U CN 214120448U
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 124
- 230000000712 assembly Effects 0.000 claims abstract description 14
- 238000000429 assembly Methods 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 12
- 239000003507 refrigerant Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a micro-channel heat exchanger and a heat exchange system, wherein the micro-channel heat exchanger comprises a first collecting pipe, a second collecting pipe and a plurality of flat pipes which are arranged in parallel between the first collecting pipe and the second collecting pipe; one end of the flat pipe is communicated with the first collecting pipe, and the other end of the flat pipe is communicated with the second collecting pipe; a plurality of groups of spacer assemblies are arranged in the first collecting pipe, each group of spacer assemblies comprises a lower spacer positioned below and an upper spacer positioned above, the lower spacer divides the first collecting pipe into a plurality of cavities, and the upper spacer is a spacer with holes; the upper spacer and the lower spacer of each group of spacer assemblies are positioned between two adjacent flat pipes at one end close to the flat pipes; and the first collecting pipe is provided with a plurality of first collecting pipe inlets and outlets, and each first collecting pipe inlet and outlet is respectively communicated with a cavity formed by the upper partition and the lower partition of each group of partition assemblies. The heat exchanger can effectively improve the nonuniformity of refrigerant distribution, thereby improving the heat exchange performance of the heat exchanger.
Description
Technical Field
The utility model relates to a heat transfer technical field, concretely relates to microchannel heat exchanger and heat pump system.
Background
The micro-channel heat exchanger is a heat exchanger with the channel equivalent diameter of 10-1000 mu m. The heat exchanger has tens of fine flow channels in the flat tube, and the fine flow channels are connected to the circular headers at both ends of the flat tube. The header is internally provided with a baffle plate to divide the heat exchanger flow passage into a plurality of flows. The existing micro-channel heat exchanger has the advantages of high efficiency, compactness, light weight, small refrigerant filling amount, low cost, easy recovery, environmental protection and the like. When the microchannel heat exchanger is used as an evaporator, an inlet is generally in a gas-liquid two-phase state, a collecting pipe of the traditional microchannel heat exchanger has no flow dividing measure, and the gas-liquid two-phase layering phenomenon is obvious after the gas-liquid two-phase layering phenomenon enters the collecting pipe, so that the refrigerant entering the flat pipe is unevenly distributed, and the heat exchange performance of the heat exchanger is poor.
The homogeneity that prior art distributes through the microchannel reposition of redundant personnel technique improvement refrigerant, the utility model patent application that application publication number is CN105180518A for example discloses the microchannel heat exchanger and the air conditioning system of pressure manifold and have this pressure manifold, sets up the foraminiferous spacer of multiunit on this pressure manifold, and every group spacer contains two spacers, and wherein the spacer that the level was placed separates into a plurality of cavitys to the pressure manifold, can improve the inhomogeneity of refrigerant distribution like this effectively, has improved the heat transfer performance of heat exchanger. However, the above-mentioned header has the following disadvantages:
referring to fig. 1, the equal level of two septa of traditional microchannel heat exchanger is placed, and centre-to-centre spacing between the flat pipe in the microchannel heat exchanger is less, has one or many flat pipes between two septa, leads to flat pipe flow between two septa too big, and other flat pipe flow outside the septa are less to arouse the heat exchanger reposition of redundant personnel uneven, influence the homogeneity of refrigerant distribution, reduced the heat transfer performance of heat exchanger.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that above-mentioned exists, provide a microchannel heat exchanger, this heat exchanger can improve the inhomogeneity of refrigerant distribution effectively to improve the heat transfer performance of heat exchanger.
Another object of the present invention is to provide a heat pump system having the microchannel heat exchanger.
The purpose of the utility model is realized through the following technical scheme:
a micro-channel heat exchanger comprises a first collecting pipe, a second collecting pipe and a plurality of flat pipes, wherein the first collecting pipe and the second collecting pipe are vertically arranged, and the flat pipes are arranged between the first collecting pipe and the second collecting pipe in parallel; one end of the flat pipe is communicated with the first collecting pipe, and the other end of the flat pipe is communicated with the second collecting pipe; the first collecting pipe is internally provided with a plurality of groups of spacer assemblies, each group of spacer assemblies comprises a lower spacer positioned below and an upper spacer positioned above, the lower spacer divides the first collecting pipe into a plurality of cavities, and the upper spacer is a spacer with holes; the upper spacer and the lower spacer of each group of spacer assemblies are positioned between two adjacent flat pipes at one end close to the flat pipes; and the first collecting pipe is provided with a plurality of first collecting pipe inlets and outlets, and each first collecting pipe inlet and outlet is respectively communicated with a cavity formed by the upper partition and the lower partition of each group of partition assembly.
The working principle of the micro-channel heat exchanger is as follows:
the during operation, the refrigerant enters into the cavity that forms between last spacer and the lower spacer from first pressure manifold exit, then the hole through last spacer sprays and enters into the cavity of top again, then get into every flat pipe by the cavity of top again, because last spacer and the lower spacer of every group spacer subassembly all are located between two adjacent flat pipes in the one end that is close to flat pipe, do not have flat pipe between two spacers, make the cavity that forms between last spacer and the lower spacer not directly communicate with flat pipe, thereby the injection effect of refrigerant has been improved, and then the homogeneity of refrigerant distribution has been improved.
The utility model discloses a preferred scheme, wherein, the spacer is the level setting down, go up the spacer and set up for the slope, extend in the direction slope slant of keeping away from flat pipe. Through setting up above-mentioned structure, on the one hand can guarantee that spacer and lower spacer all lie in between two adjacent flat pipes in the one end that is close to flat pipe, on the other hand can guarantee that the cavity that spacer and lower spacer formed can have sufficient space and first pressure manifold to import and export the intercommunication.
Preferably, the upper spacer is arranged horizontally, and the lower spacer is arranged obliquely and extends obliquely downwards in the direction away from the flat pipe. By adopting the structure, on one hand, the upper spacer and the lower spacer can be ensured to be positioned between two adjacent flat pipes at one end close to the flat pipes; on the other hand, the cavity formed by the upper spacer and the lower spacer can be ensured to have enough space to be communicated with the inlet and the outlet of the first collecting pipe.
Preferably, the lower spacer and the upper spacer are both obliquely arranged, wherein the lower spacer extends obliquely downwards in a direction away from the flat tube, and the upper spacer extends obliquely upwards in a direction away from the flat tube. Similarly, by adopting the structure, on one hand, the upper spacer and the lower spacer can be ensured to be positioned between two adjacent flat pipes at the end close to the flat pipes; on the other hand, the cavity formed by the upper spacer and the lower spacer can be ensured to have enough space to be communicated with the inlet and the outlet of the first collecting pipe.
Preferably, the number of the holes of the upper spacer is one or more.
Further, the axis of the hole and the axis of the first header are parallel to each other. The advantage of setting up like this is favorable to the refrigerant more evenly to get into in the top cavity to the homogeneity of refrigerant distribution has been guaranteed.
Further, the shape of the hole is circular, triangular or square.
Further, the diameter of the hole is 0.1-3 mm.
A heat pump system comprises the microchannel heat exchanger, a four-way valve, a compressor, a heat exchanger, a throttling device and a flow divider; the four-way valve is provided with a valve port a, a valve port b, a valve port c and a valve port d; the microchannel heat exchanger, the four-way valve, the heat exchanger, the throttling device and the flow divider are sequentially connected through pipelines, a valve port c on the four-way valve is communicated with the second collecting pipe, and a valve port b on the four-way valve is communicated with the heat exchanger; one end of the compressor is communicated with a valve port a on the four-way valve, and the other end of the compressor is communicated with a valve port d on the four-way valve; the microchannel heat exchanger, the four-way valve, the compressor, the heat exchanger, the throttling device and the flow divider form a closed circulating system. The working principle of the heat pump system is as follows:
when the microchannel heat exchanger is used as a condenser, a valve port a of the four-way valve is communicated with a valve port b, a valve port c is communicated with a valve port d, a refrigerant discharged from the compressor passes through the four-way valve, then enters the microchannel heat exchanger for condensation and heat release, then flows into the flow divider in multiple paths through the first collecting pipe, enters the throttling valve for throttling after being converged by the flow divider, then enters the heat exchanger for evaporation and heat absorption, and then returns to the compressor through the four-way valve to complete circulation;
when the microchannel heat exchanger is used as an evaporator, the valve port a of the four-way valve is communicated with the valve port c, the valve port b of the four-way valve is communicated with the valve port d, a refrigerant discharged from the compressor enters the heat exchanger through the four-way valve to be condensed and released, then enters the throttling device to be throttled, then is shunted into a plurality of paths through the shunt to enter the microchannel heat exchanger to be evaporated and absorbed, then flows out of the outlet of the second collecting pipe, and finally returns to the compressor through the four-way valve to finish circulation.
Compared with the prior art, the utility model following beneficial effect has:
1. the utility model discloses in, because last spacer and the lower spacer of every group spacer subassembly all are located between two adjacent flat pipes in the one end that is close to flat pipe, do not have flat pipe between two spacers, make the cavity that forms between last spacer and the lower spacer not directly communicate with flat pipe, the injection effect of refrigerant has been improved, thereby the inhomogeneity of refrigerant distribution has effectively been solved, the heat transfer performance of heat exchanger has been improved, can make the heat of heat exchanger obtain effectual utilization, the effective heat transfer area of increase heat exchanger, thereby heat pump system's work efficiency has been improved.
2. According to the preferred scheme of the utility model, the lower spacer is horizontally arranged, and the upper spacer is obliquely arranged; on one hand, the upper spacer and the lower spacer are ensured to be positioned between two adjacent flat pipes at one end close to the flat pipes; on the other hand, the cavity formed by the upper spacer and the lower spacer can be ensured to have enough space to be communicated with the inlet and the outlet of the first collecting pipe.
Drawings
The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived from the following drawings without inventive effort.
Fig. 1 is a partial cross-sectional view of a manifold of a conventional microchannel heat exchanger.
Fig. 2 is a schematic perspective view of a first embodiment of a microchannel heat exchanger according to the present invention.
Fig. 3 is an internal cross-sectional view of a microchannel heat exchanger according to the present invention.
Fig. 4 is a partial cross-sectional view of the first header according to the present invention.
Fig. 5 is a perspective view of the spacer of the present invention having a circular center hole.
FIG. 6 is an internal cross-sectional view of the septum of FIG. 5.
Fig. 7 is a perspective view of the spacer with a triangular center hole according to the present invention.
FIG. 8 is an internal cross-sectional view of the spacer of FIG. 7.
Fig. 9 is a perspective view of the spacer of the present invention having a square center hole.
FIG. 10 is an internal cross-sectional view of the spacer of FIG. 9.
Fig. 11 is a schematic cycle diagram of a heat pump system according to the present invention.
Fig. 12 is a partial cross-sectional view of another embodiment of the first manifold of the present invention.
Fig. 13 is a partial sectional view of a third embodiment of the first manifold according to the present invention.
Detailed Description
The invention will be further described with reference to the following examples.
Example 1
Referring to fig. 2 to 4, the embodiment discloses a microchannel heat exchanger 4, which includes a first collecting pipe 1, a second collecting pipe 2, a plurality of flat pipes 3 arranged in parallel between the first collecting pipe 1 and the second collecting pipe 2, and fins (not shown in the drawings) for heat dissipation, wherein the first collecting pipe 1 and the second collecting pipe 2 are arranged vertically; one end of the flat pipe 3 is communicated with the first collecting pipe 1, and the other end of the flat pipe is communicated with the second collecting pipe 2; a plurality of groups of spacer assemblies are arranged in the first collecting pipe 1, each group of spacer assemblies comprises a lower spacer 101 positioned below and an upper spacer 102 positioned above, the lower spacer 101 divides the first collecting pipe 1 into a plurality of cavities, and the upper spacer 102 is a spacer with holes 112; the upper spacer 102 and the lower spacer 101 of each group of spacer assemblies are positioned between two adjacent flat tubes 3 at one end close to the flat tubes 3, and the distance between the upper spacer 102 and the lower spacer 101 is smaller than the center distance between the two adjacent flat tubes 3; the first collecting pipe 1 is provided with a plurality of first collecting pipe inlets and outlets 103, and each first collecting pipe inlet and outlet 103 is respectively communicated with a cavity formed by the upper partition 102 and the lower partition 101 of each group of partition assemblies.
Referring to fig. 2 to 4, upper spacer 102 and lower spacer 101 are both oval, lower spacer 101 is disposed horizontally, and upper spacer 102 is disposed obliquely and extends obliquely upward in a direction away from flat tube 3. Through setting up above-mentioned structure, on the one hand can guarantee that spacer 102 and spacer 101 all lie in between two adjacent flat pipe 3 near flat pipe 3's one end down, on the other hand can guarantee that the cavity that spacer 102 and spacer 101 formed down can have sufficient space and first pressure manifold exit 103 intercommunication.
Further, the number of the holes 112 of the upper spacer 102 is one or more.
Further, the axis of the hole 112 and the axis of the first header 1 are parallel to each other. The advantage of setting up like this is favorable to the refrigerant more evenly to get into in the top cavity to the homogeneity of refrigerant distribution has been guaranteed.
Referring to fig. 5-10, the aperture 112 is circular, triangular, or square in shape.
Further, the diameter of the hole 112 is 0.1 to 3 mm.
Referring to fig. 2 to 4, the operating principle of the microchannel heat exchanger 4 is as follows:
during operation, the refrigerant enters into the cavity that forms between last spacer 102 and lower spacer 101 from first pressure manifold inlet/outlet 103, then spray through the hole 112 of last spacer 102 and enter into the cavity of top again, then get into every flat pipe 3 by the cavity of top again, because last spacer 102 and the lower spacer 101 of every group spacer subassembly all are located between two adjacent flat pipe 3 near flat pipe 3's one end, do not have flat pipe 3 between two spacers, make the cavity that forms between last spacer 102 and the lower spacer 101 not directly communicate with flat pipe 3, thereby the injection effect of refrigerant has been improved, and then the homogeneity of refrigerant distribution has been improved.
Referring to fig. 3 and fig. 11, the embodiment discloses a heat pump system, which includes the above-mentioned microchannel heat exchanger 4, four-way valve 5, compressor 6, heat exchanger 7, throttling device 8 and flow divider 9; the four-way valve 5 is provided with a valve port a, a valve port b, a valve port c and a valve port d; the second collecting pipe 2 is provided with a plurality of second collecting pipe inlets and outlets 201, the second collecting pipe inlets and outlets 201 are communicated with a valve port c on the four-way valve 5 through a pipeline, a valve port b is communicated with the input end of a heat exchanger through a pipeline, the output end of the heat exchanger is communicated with the input end of a throttling device 8 through a pipeline, the output end of the throttling device 8 is communicated with the input end of a flow divider 9 through a pipeline, and the output end of the flow divider 9 is divided into multiple paths to be respectively communicated with a first collecting pipe inlet and outlet 103 on the microchannel heat exchanger 4; one end of the compressor 6 is communicated with a valve port a on the four-way valve 5, and the other end of the compressor is communicated with a valve port d on the four-way valve 5; the micro-channel heat exchanger 4, the four-way valve 5, the compressor 6, the heat exchanger 7, the throttling device 8 and the flow divider 9 form a closed circulating system.
Referring to fig. 3 and 11, the working principle of the heat pump system is as follows:
when the microchannel heat exchanger 4 is used as a condenser, the valve port a and the valve port b of the four-way valve 5 are communicated, the valve port c and the valve port d are communicated, a refrigerant discharged from the compressor 6 passes through the four-way valve 5, then enters the microchannel heat exchanger 4 to be condensed and released, then flows into the flow divider 9 in a multipath manner through the first collecting pipe 1, enters the throttling valve to be throttled after being converged by the flow divider 9, then enters the heat exchanger 7 to be evaporated and absorbed, and then returns to the compressor 6 through the four-way valve 5 to finish circulation.
When the microchannel heat exchanger 4 is used as an evaporator, the valve port a of the four-way valve 5 is communicated with the valve port c, the valve port b is communicated with the valve port d, refrigerant discharged from the compressor 6 enters the heat exchanger 7 through the four-way valve 5 to be condensed and released, then enters the throttling device 8 to be throttled, then is shunted into multiple paths through the shunt 9 to enter the microchannel heat exchanger 4 to be evaporated and absorbed, then flows out from the outlet of the second collecting pipe 2, and finally returns to the compressor 6 through the four-way valve 5 to finish circulation.
Example 2
The other structure in this embodiment is the same as embodiment 1, except that upper spacer 102 is disposed horizontally, and lower spacer 101 is disposed obliquely and extends obliquely downward in a direction away from flat tube 3. By adopting the structure, on one hand, the upper spacer 102 and the lower spacer 101 can be ensured to be positioned between two adjacent flat tubes 3 at one end close to the flat tubes 3; on the other hand, the cavity formed by the upper spacer 102 and the lower spacer 101 can be ensured to have enough space to be communicated with the first collecting main inlet/outlet 103.
Example 3
The other structure in this embodiment is the same as embodiment 1, except that both lower web 101 and upper web 102 are provided obliquely, wherein lower web 101 extends obliquely downward in a direction away from flat tube 3, and upper web 102 extends obliquely upward in a direction away from flat tube 3. Similarly, by adopting the structure, on one hand, the upper spacer 102 and the lower spacer 101 can be ensured to be positioned between two adjacent flat tubes 3 at the end close to the flat tubes 3; on the other hand, the cavity formed by the upper spacer 102 and the lower spacer 101 can be ensured to have enough space to be communicated with the first collecting main inlet/outlet 103.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A micro-channel heat exchanger comprises a first collecting pipe, a second collecting pipe and a plurality of flat pipes, wherein the first collecting pipe and the second collecting pipe are vertically arranged, and the flat pipes are arranged between the first collecting pipe and the second collecting pipe in parallel; one end of the flat pipe is communicated with the first collecting pipe, and the other end of the flat pipe is communicated with the second collecting pipe; the multi-cavity high-pressure gas collecting pipe is characterized in that a plurality of groups of spacer assemblies are arranged in the first collecting pipe, each group of spacer assemblies comprises a lower spacer positioned below and an upper spacer positioned above, the lower spacer divides the first collecting pipe into a plurality of cavities, and the upper spacer is a spacer with holes; the upper spacer and the lower spacer of each group of spacer assemblies are positioned between two adjacent flat pipes at one end close to the flat pipes; and the first collecting pipe is provided with a plurality of first collecting pipe inlets and outlets, and each first collecting pipe inlet and outlet is respectively communicated with a cavity formed by the upper partition and the lower partition of each group of partition assembly.
2. The microchannel heat exchanger of claim 1, wherein the lower webs are horizontally disposed and the upper webs are obliquely disposed and extend obliquely upward in a direction away from the flat tubes.
3. The microchannel heat exchanger of claim 1, wherein the upper spacer is horizontally disposed and the lower spacer is obliquely disposed to extend obliquely downward in a direction away from the flat tubes.
4. The microchannel heat exchanger of claim 1, wherein the lower webs and the upper webs are each disposed obliquely, wherein the lower webs extend obliquely downward in a direction away from the flat tubes, and the upper webs extend obliquely upward in a direction away from the flat tubes.
5. The microchannel heat exchanger of any one of claims 1 to 4, wherein the number of the holes of the upper spacer is one or more.
6. The microchannel heat exchanger of any one of claims 1-4, wherein the axis of the bore and the axis of the first header are parallel to one another.
7. The microchannel heat exchanger of any one of claims 1-4, wherein the holes are circular, triangular or square in shape.
8. A microchannel heat exchanger according to any one of claims 1 to 4 wherein the diameter of the holes is in the range 0.1 to 3 mm.
9. A heat pump system comprising the microchannel heat exchanger, four-way valve, compressor, heat exchanger, throttling device, and flow divider of any of claims 1-8; the four-way valve is provided with a valve port a, a valve port b, a valve port c and a valve port d; the microchannel heat exchanger, the four-way valve, the heat exchanger, the throttling device and the flow divider are sequentially connected through pipelines, a valve port c on the four-way valve is communicated with the second collecting pipe, and a valve port b on the four-way valve is communicated with the heat exchanger; one end of the compressor is communicated with a valve port a on the four-way valve, and the other end of the compressor is communicated with a valve port d on the four-way valve; the microchannel heat exchanger, the four-way valve, the compressor, the heat exchanger, the throttling device and the flow divider form a closed circulating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022265404.7U CN214120448U (en) | 2020-10-12 | 2020-10-12 | Micro-channel heat exchanger and heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022265404.7U CN214120448U (en) | 2020-10-12 | 2020-10-12 | Micro-channel heat exchanger and heat pump system |
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| CN214120448U true CN214120448U (en) | 2021-09-03 |
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| CN202022265404.7U Active CN214120448U (en) | 2020-10-12 | 2020-10-12 | Micro-channel heat exchanger and heat pump system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847757A (en) * | 2021-09-28 | 2021-12-28 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
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- 2020-10-12 CN CN202022265404.7U patent/CN214120448U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847757A (en) * | 2021-09-28 | 2021-12-28 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
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