CN109724235B - Heat exchanger, heat exchange system and air conditioner - Google Patents
Heat exchanger, heat exchange system and air conditioner Download PDFInfo
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- CN109724235B CN109724235B CN201711033339.1A CN201711033339A CN109724235B CN 109724235 B CN109724235 B CN 109724235B CN 201711033339 A CN201711033339 A CN 201711033339A CN 109724235 B CN109724235 B CN 109724235B
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Abstract
The invention discloses a heat exchanger, a heat exchange system and an air conditioner, wherein the heat exchanger comprises a plurality of rows of sub heat exchangers, the plurality of rows of sub heat exchangers are arranged along the thickness direction of the sub heat exchangers and are mutually parallel, the heat exchanger is provided with a plurality of refrigerant systems, and each refrigerant system is distributed on at least two rows of sub heat exchangers; and at least one part of the projection of the part of the same refrigerant system on any two rows of the sub heat exchangers is not overlapped in a plane which is orthogonal to the thickness direction of the sub heat exchangers. The heat exchanger provided by the embodiment of the invention is suitable for a multi-refrigerant loop and has the advantages of high heat exchange efficiency, uniform outlet air temperature and the like.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a heat exchanger, a heat exchange system with the heat exchanger and an air conditioner with the heat exchange system.
Background
Some of the related art air conditioners, such as commercial air conditioners, employ a plurality of refrigerant circuits. Taking the double refrigerant circuits as an example, under low load, a certain refrigerant circuit can be controlled to stop to adapt to the change of the load, thereby providing better operation efficiency.
However, a plurality of refrigerant circuits share one fan, when the whole machine operates at partial load, if only one refrigerant circuit operates, the plurality of refrigerant circuits are relatively independent, so that only one refrigerant circuit has refrigerant flowing, and other refrigerant circuits which do not operate do not have refrigerant flowing, so that the air volume of other refrigerant circuits is bypassed and does not participate in heat exchange, the whole heat exchanger has low effective utilization rate and low heat exchange efficiency, the air outlet temperature difference of the plurality of refrigerant circuits is large, and the air outlet temperature is very uneven.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a heat exchanger which is suitable for a multi-refrigerant loop and has the advantages of high heat exchange efficiency, uniform outlet air temperature and the like.
The invention also provides a heat exchange system with the heat exchanger.
The invention also provides an air conditioner with the heat exchange system.
According to an embodiment of the first aspect of the present invention, a heat exchanger is provided, where the heat exchanger includes a plurality of rows of sub heat exchangers, the plurality of rows of sub heat exchangers are arranged in a thickness direction of the sub heat exchangers and are parallel to each other, the heat exchanger has a plurality of refrigerant systems, and each refrigerant system is distributed on at least two rows of sub heat exchangers; and at least one part of the projection of the part of the same refrigerant system on any two rows of the sub heat exchangers is not overlapped in a plane which is orthogonal to the thickness direction of the sub heat exchangers.
The heat exchanger provided by the embodiment of the invention is suitable for a multi-refrigerant loop and has the advantages of high heat exchange efficiency, uniform outlet air temperature and the like.
According to some embodiments of the invention, each row of sub-heat exchangers comprises: a first collecting pipe and a second collecting pipe; the two ends of each heat exchange tube are respectively connected with the first collecting pipe and the second collecting pipe; and the fins are arranged between the adjacent heat exchange tubes.
Further, a plurality of the refrigerant systems are separated at each of the first header and the second header.
Furthermore, each collecting pipe in the first collecting pipe and the second collecting pipe is internally provided with a plurality of separated refrigerant cavities, the number of the refrigerant cavities in each collecting pipe is consistent with that of the refrigerant systems, and the refrigerant cavities in each collecting pipe respectively form part of the refrigerant systems in a one-to-one correspondence manner.
Furthermore, a plurality of refrigerant distribution pipes are arranged in each collecting pipe, the number of the refrigerant distribution pipes in each collecting pipe is consistent with that of the refrigerant systems, and each refrigerant distribution pipe is provided with a refrigerant distribution hole communicated with one refrigerant cavity.
Further, each refrigerant distribution pipe in each collecting pipe extends in the whole length direction of the collecting pipe, and the plurality of refrigerant distribution pipes in each collecting pipe are arranged in parallel.
Furthermore, a refrigerant inlet and a refrigerant outlet of each refrigerant system are arranged on the first collecting pipe and the second collecting pipe.
According to some embodiments of the invention, the plurality of refrigerant chambers within each manifold are separated by a partition disposed within the manifold.
According to some specific examples of the present invention, each header includes a plurality of sub-flow pipes disconnected from each other, and the plurality of refrigerant chambers in the header are respectively defined by the plurality of sub-flow pipes in a one-to-one correspondence.
According to some embodiments of the invention, a plurality of the refrigerant systems are separated on the heat exchange tube.
An embodiment according to the second aspect of the invention proposes a heat exchange system comprising: a plurality of compressors; according to the heat exchanger of the embodiment of the first aspect of the present invention, the plurality of compressors and the plurality of refrigerant systems of the heat exchanger are respectively communicated in a one-to-one correspondence manner to form a plurality of refrigerant loops; and the fan is used for accelerating the gas flow on the surface of the heat exchanger.
According to the heat exchange system provided by the embodiment of the invention, the heat exchanger provided by the embodiment of the first aspect of the invention has the advantages of high heat exchange efficiency, uniform outlet air temperature and the like.
Embodiments according to a third aspect of the present invention propose an air conditioner comprising a heat exchange system according to embodiments of the second aspect of the present invention.
According to the air conditioner provided by the embodiment of the invention, the heat exchange system provided by the embodiment of the second aspect of the invention has the advantages of high heat exchange efficiency, uniform outlet air temperature and the like.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front view of a heat exchanger according to an embodiment of the present invention.
FIG. 2 is a side view of a heat exchanger according to an embodiment of the present invention.
Fig. 3 is a sectional view a-a and a sectional view B-B in fig. 1.
Fig. 4 is a sectional view a-a and a sectional view B-B of another embodiment of fig. 1.
Fig. 5 is a front view of a heat exchanger according to another embodiment of the present invention.
FIG. 6 is a side view of a heat exchanger according to another embodiment of the invention.
Fig. 7 is a sectional view taken along line C-C and a sectional view taken along line D-D in fig. 5.
Fig. 8 is a front view of a heat exchanger according to still another embodiment of the present invention.
Fig. 9-12 are schematic structural views of heat exchange tubes of heat exchangers according to various embodiments of the present invention.
FIG. 13 is a linear plot of air flow direction versus heat transfer temperature difference.
Fig. 14 is a comparative graph of the outlet air temperature difference between the heat exchanger according to the embodiment of the present invention and the heat exchanger in the prior art.
Reference numerals:
a heat exchanger 1,
A first collecting pipe 11, a second collecting pipe 12, heat exchange pipes 13, fins 14, a refrigerant cavity 15, a refrigerant distribution pipe 16, a refrigerant distribution hole 17, a partition plate 18, a sub-collecting pipe 19,
A first refrigerant system 20, a refrigerant inlet 21 of the first refrigerant system 20, a refrigerant outlet 22 of the first refrigerant system 20,
A second refrigerant system 30, a refrigerant inlet 31 of the second refrigerant system 30, a refrigerant outlet 32 of the second refrigerant system 30,
A refrigerant inlet 41 of the third refrigerant system 40, and a refrigerant outlet 42 of the third refrigerant system 40.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "upper", "lower", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A heat exchanger 1 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 14, a heat exchanger 1 according to an embodiment of the present invention includes a multi-row sub-heat exchanger. The plurality of rows of sub heat exchangers are arranged in the thickness direction of the sub heat exchangers and are parallel to each other, in other words, the heat exchanger 1 is a multi-row heat exchanger in which a plurality of sub heat exchangers are arranged. It is understood here that the heat exchanger 1 is of a multi-row structure, wherein the units forming each row are sub heat exchangers, for example, one heat exchanger is bent into two rows, and two units forming two rows after two bends are two sub heat exchangers.
The heat exchanger 1 is provided with a plurality of refrigerant systems, and each refrigerant system is distributed on at least two rows of sub heat exchangers. It can be understood by those skilled in the art that when the heat exchanger 1 is applied to a heat exchange system with multiple refrigerant circuits, the multiple refrigerant systems of the heat exchanger 1 form part of the multiple refrigerant circuits in a one-to-one correspondence manner.
In a plane orthogonal to the thickness direction of the sub heat exchangers, at least one part of the projection of the part of the same refrigerant system on any two rows of the sub heat exchangers is not overlapped. That is to say, the parts of the same refrigerant system on any two rows of sub heat exchangers are not completely overlapped or not completely overlapped in the air flow direction, and the heat exchange areas of any two refrigerant systems can be the same or different.
For example, taking a dual refrigerant system as an example, the heat exchanger 1 in which the portions of the two rows of the same refrigerant system do not completely overlap in the air flow direction according to the embodiment of the present invention is compared with the heat exchanger in the prior art in which the portions of the two rows of the same refrigerant system completely overlap in the air flow direction.
Wherein, the air sweeps across the surface of the heat exchanger, and the heat exchange efficiency of the heat exchanger is gradually reduced from the windward side to the leeward side, because the heat transfer temperature difference between the air and the refrigerant is gradually reduced from the windward side to the leeward side (as shown in fig. 13). When the heat exchanger operates at partial load, only one refrigerant system in the double refrigerant systems is supposed to operate.
According to a heat exchange quantity formula of the heat exchanger: q ═ KA Δ t ═ KA1Δt1+KA2Δt2. Wherein Q is heat exchange quantity, K heat transfer coefficient, A heat exchange area, delta t is heat transfer temperature difference, A1To the windward side heat exchange area, A2Is the heat exchange area of the leeward side, Δ t1Is the average heat transfer temperature difference on the windward side, delta t2The average heat transfer temperature difference on the leeward side.
It is assumed that the heat exchanger 1 of the embodiment of the present invention has the same structure and air surface wind speed as the conventional heat exchanger, i.e., K is the same.
The heat exchanger 1 of the embodiment of the invention has the following heat exchange amount:
Q1＝KA11Δt1+KA21Δt2wherein A is11>A21,Δt1>Δt2A11+A21＝A；
Q2＝KA12Δt1+KA22Δt2Wherein A is12＝A22,A21+A22＝A；
Q1-Q2＝K(A11-A12)Δt1-K(A22-A21)Δt2；
A11-A12＝A22-A21；
Thereby, Q1-Q2>0。
It can be seen that the heat exchange amount of the heat exchanger 1 of the embodiment of the present invention is greater than that of the heat exchanger of the prior art.
In addition, the change of the outlet air temperature of the heat exchanger is shown in fig. 14, wherein a straight line is a temperature curve of the existing heat exchanger, and a sawtooth line is a temperature curve of the heat exchanger 1 according to the embodiment of the present invention. As can be seen from the figure, the outlet air temperature of the heat exchanger 1 of the embodiment of the present invention is more uniform than that of the existing heat exchanger.
Because the air outlet temperature under partial load can be uniformly reached at the user position only by mixing the high-temperature air and the low-temperature air in the air pipe, the more uneven the temperature at the outlet of the heat exchanger is, the longer the pipe is needed to meet the mixing of the high-temperature air and the low-temperature air, so that the installation is not flexible, and the installation cost is higher, but the air outlet temperature of the heat exchanger 1 of the embodiment of the invention is more uniform, so the installation is more flexible, and the installation cost is lower.
Therefore, the heat exchanger 1 is suitable for a multi-refrigerant loop, and the utilization rate of the heat exchange area is higher when the heat exchanger is operated under partial load, so that the heat exchange efficiency is higher, and the outlet air temperature is more uniform.
A heat exchanger 1 according to a specific embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 14, a heat exchanger 1 according to an embodiment of the present invention includes a multi-row sub-heat exchanger. Each row of the sub-heat exchangers comprises a first collecting pipe 11, a second collecting pipe 12, a plurality of heat exchange pipes 13 and fins 14.
The first collecting pipe 11 and the second collecting pipe 12 are arranged in parallel and at intervals. Two ends of each heat exchange tube 13 are respectively connected with the first collecting pipe 11 and the second collecting pipe 12, and the plurality of heat exchange tubes 13 are arranged at intervals along the axial direction of the first collecting pipe 11 and the axial direction of the second collecting pipe 12. The fins 14 are provided between the adjacent heat exchange tubes 13. Wherein, the heat exchange tube 13 can be flat pipe, and the width direction of flat pipe is on a parallel with sub heat exchanger's thickness direction. For a plurality of row sub heat exchangers, the first headers 11 of the plurality of row sub heat exchangers are arranged side by side and the second headers 12 are arranged side by side.
In some embodiments of the present invention, as shown in fig. 1 to 8, a plurality of refrigerant systems are separated in each of the first header 11 and the second header 12, for example, in the axial direction of the first header 11 and the axial direction of the second header 12.
Specifically, as shown in fig. 3, 4, 7 and 8, each of the first header 11 and the second header 12 has a plurality of refrigerant chambers 15 therein, and the plurality of refrigerant chambers 15 in each header are arranged along the axial direction of the header. The number of the refrigerant cavities 15 in each collecting pipe is consistent with that of the refrigerant systems, the refrigerant cavities 15 in each collecting pipe respectively form part of the refrigerant systems in a one-to-one correspondence mode, namely each refrigerant cavity 15 forms part of one refrigerant system, and the refrigerant cavities 15 of adjacent collecting pipes are correspondingly communicated to form the same refrigerant system.
In some embodiments of the invention, as shown in fig. 3, 4 and 7, the plurality of refrigerant chambers 15 in each manifold are separated by a partition 18 disposed within the manifold. The refrigerant inlet and the refrigerant outlet of each refrigerant system are arranged on the first collecting pipe 11 and the second collecting pipe 12.
Further, as shown in fig. 3, 4 and 7, a plurality of refrigerant distribution pipes 16 are disposed in each collecting pipe, the number of the refrigerant distribution pipes 16 in each collecting pipe is the same as that of the refrigerant systems, and each refrigerant distribution pipe 16 is provided with a refrigerant distribution hole 17 communicated with one of the refrigerant chambers 15 for distributing and collecting the refrigerant.
Each refrigerant distribution pipe 16 in each collecting pipe extends in the whole length direction of the collecting pipe, and a plurality of refrigerant distribution pipes 16 in each collecting pipe are arranged in parallel.
Of course, the present invention is not limited to this, and the refrigerant distribution pipe 16 may not extend in the entire length direction of the header pipe, for example, a portion of the refrigerant distribution pipe 16 not provided with the refrigerant distribution holes 17 may be removed, and the removed portion is sealed by a sealing head.
Several heat exchangers 1 according to specific examples of the present invention are described below by way of example, wherein the top, bottom, left and right directions are based on the top, bottom, left and right of the drawings, which are only for convenience of understanding the technical solution of the present invention and are not intended to limit the present invention.
As shown in fig. 3, the heat exchanger 1 has a double-row and double-refrigerant system structure, i.e., a first refrigerant system 20 and a second refrigerant system 30. The refrigerant inlet 21 of the first refrigerant system 20 is formed at the right ends of the two second headers 12 and shares an inlet joint, and the refrigerant outlet 22 of the first refrigerant system 20 is formed at the right ends of the two first headers 11 and shares an outlet joint. The refrigerant inlet 31 of the second refrigerant system 30 is formed at the left end of the two second collecting pipes 12 and shares the inlet joint, and the refrigerant outlet 32 of the second refrigerant system 30 is formed at the corresponding left end of the two first collecting pipes 11 and shares the outlet structure.
In the same sub-heat exchanger, the partition 18 in the first header 11 and the partition in the second header 12 are disposed in parallel and level with each other in the axial direction of the first header 11 and the axial direction of the second header 12. In different sub-heat exchangers, the partition plates 18 in the two first collecting pipes 11 are arranged in a staggered manner in the axial direction of the first collecting pipes 11, and the partition plates 18 in the two second collecting pipes 12 are arranged in a staggered manner in the axial direction of the first collecting pipes 11.
Thus, the first refrigerant system 20 is distributed on the left side of the partition 18 of the upper second header 12, on the right side of the partition 18 of the lower second header 12, on the right side of the partition 18 of the upper first header 11, and on the left side of the partition 18 of the lower first header 11. The second refrigerant system 30 is distributed on the right side of the partition 18 of the upper second header 12, the left side of the partition 18 of the lower second header 12, the left side of the partition 18 of the upper first header 11, and the right side of the partition 18 of the lower first header 11. The parts of the same refrigerant system on the two rows of sub heat exchangers are not completely overlapped along the air flowing direction.
As shown in fig. 4, the heat exchanger 1 has a double-row and double-refrigerant system structure, i.e., a first refrigerant system 20 and a second refrigerant system 30. The refrigerant inlet 21 of the first refrigerant system 20 is formed at the right ends of the two second headers 12 and shares an inlet joint, and the refrigerant outlet 22 of the first refrigerant system 20 is formed at the right ends of the two first headers 11 and shares an outlet joint. The refrigerant inlet 31 of the second refrigerant system 30 is formed at the left end of the two second collecting pipes 12 and shares the inlet joint, and the refrigerant outlet 32 of the second refrigerant system 30 is formed at the corresponding left end of the two first collecting pipes 11 and shares the outlet structure.
The partitions 18 in the two first headers 11 and the partitions in the two second headers 12 are arranged flush with each other in the axial direction of the first header 11 and the axial direction of the second header 12.
Thus, the first refrigerant system 20 is distributed on the left side of the partition 18 of the upper second header 12, on the right side of the partition 18 of the lower second header 12, on the right side of the partition 18 of the upper first header 11, and on the left side of the partition 18 of the lower first header 11. The second refrigerant system 30 is distributed on the right side of the partition 18 of the upper second header 12, the left side of the partition 18 of the lower second header 12, the left side of the partition 18 of the upper first header 11, and the right side of the partition 18 of the lower first header 11. The parts of the same refrigerant system on the two rows of sub heat exchangers are not overlapped at all along the air flowing direction.
As shown in fig. 7, the heat exchanger 1 has a two-row and three-refrigerant system structure, i.e., a first refrigerant system 20, a second refrigerant system 30, and a third refrigerant system 40. The refrigerant inlet 21 of the first refrigerant system 20 is formed at the right ends of the two second headers 12 and shares an inlet joint, and the refrigerant outlet 22 of the first refrigerant system 20 is formed at the right ends of the two first headers 11 and shares an outlet joint. The refrigerant inlet 31 of the second refrigerant system 30 is formed at the left end of the two second collecting pipes 12 and shares the inlet joint, and the refrigerant outlet 32 of the second refrigerant system 30 is formed at the corresponding left end of the two first collecting pipes 11 and shares the outlet structure. The refrigerant inlet 41 of the third refrigerant system 40 is formed at the right ends of the two second headers 12 and shares the inlet joint, and the refrigerant outlet 42 of the third refrigerant system 40 is formed at the right ends of the two first headers 11 and shares the outlet joint.
The left partition plates 18 in the two first collecting pipes 11 and the left partition plates in the two second collecting pipes 12 are arranged in parallel and level in the axial direction of the first collecting pipes 11 and the axial direction of the second collecting pipes 12, and the right partition plates 18 in the two first collecting pipes 11 and the right partition plates in the two second collecting pipes 12 are arranged in parallel and level in the axial direction of the first collecting pipes 11 and the axial direction of the second collecting pipes 12.
Thus, the first refrigerant system 20 is distributed to the right of the right partition 18 of the upper second header 12, between the two partitions 18 of the lower second header 12, between the two partitions 18 of the upper first header 11, and to the right of the right partition 18 of the lower first header 11. The second refrigerant systems 30 are distributed on the left side of the left partition 18 of the upper second header 12, on the right side of the right partition 18 of the lower second header 12, on the right side of the right partition 18 of the upper first header 11, and on the left side of the left partition 18 of the lower first header 11. The third refrigerant system 40 is distributed between the two partitions 18 of the upper second header 12, on the left side of the left partition 18 of the lower second header 12, on the left side of the left partition 18 of the upper first header 11, and between the two partitions 18 of the lower first header 11. The parts of the same refrigerant system on the two rows of sub heat exchangers are not overlapped at all along the air flowing direction.
In other embodiments of the invention, as shown in fig. 8, the headers may be internally divided without a separator 18, but instead may take the form of a header break. Specifically, each header includes a plurality of sub-flow pipes 19 disconnected from each other, and the plurality of refrigerant chambers 15 in the header are respectively defined by the plurality of sub-flow pipes 19 in a one-to-one correspondence manner, that is, each sub-flow pipe 19 defines one refrigerant chamber 15.
In some embodiments of the present invention, as shown in fig. 9-12, a plurality of the refrigerant systems are separated on the heat exchange tube 13, for example, in the length direction of the heat exchange tube 13, and the refrigerant inlet and the refrigerant outlet of each of the refrigerant systems are provided on the collecting main.
For example, as shown in fig. 9, for a heat exchanger 1 of a dual-row and dual-refrigerant system, the heat exchanger 1 is formed by respectively bending heat exchange tubes of two integral heat exchangers, a bent left part of an upper heat exchanger and a bent left part of a lower heat exchanger form a sub-heat exchanger, and a bent right part of the upper heat exchanger and a bent right part of the lower heat exchanger form another sub-heat exchanger.
The refrigerant inlet 21 of the first refrigerant system 20 is disposed at the lower end of the bent left portion of the upper heat exchanger, the refrigerant inlet 31 of the second refrigerant system 30 is disposed at the upper end of the bent left portion of the lower heat exchanger, and the refrigerant inlet 21 of the first refrigerant system 20 and the refrigerant inlet 31 of the second refrigerant system 30 are adjacent to each other. The refrigerant outlet 22 of the first refrigerant system 20 is disposed at the lower end of the bent right portion of the upper heat exchanger, the refrigerant outlet 32 of the second refrigerant system 30 is disposed at the upper end of the bent right portion of the lower heat exchanger, and the refrigerant outlet 22 of the first refrigerant system 20 and the refrigerant outlet 32 of the second refrigerant system 30 are adjacent to each other.
As shown in fig. 10, for the heat exchanger 1 of the double-row and double-refrigerant system, the heat exchanger 1 is composed of two integral heat exchangers and one of the heat exchangers with bent heat exchange tubes, the upper end and the lower end of the left heat exchanger are both bent rightwards, the bent left part of the left heat exchanger forms a sub-heat exchanger, and the bent right part of the left heat exchanger form another sub-heat exchanger.
The refrigerant inlet 21 of the first refrigerant system 20 is disposed at the upper end of the bent lower right portion of the left heat exchanger, the refrigerant inlet 31 of the second refrigerant system 30 is disposed at the lower end of the right heat exchanger, and the refrigerant inlet 21 of the first refrigerant system 20 and the refrigerant inlet 31 of the second refrigerant system 30 are adjacent to each other. The refrigerant outlet 22 of the first refrigerant system 20 is disposed at the lower end of the bent upper right portion of the left heat exchanger, the refrigerant outlet 32 of the second refrigerant system 30 is disposed at the upper end of the right heat exchanger, and the refrigerant outlet 22 of the first refrigerant system 20 and the refrigerant outlet 32 of the second refrigerant system 30 are adjacent to each other.
As shown in fig. 11, for the heat exchanger 1 of the dual-row and dual-refrigerant system, the heat exchanger 1 is composed of two integral heat exchangers and one of the heat exchangers with a bent heat exchange tube, the upper end of the left heat exchanger is bent to the right, the bent left part of the left heat exchanger forms a sub-heat exchanger, and the bent right part and the bent right heat exchanger of the left heat exchanger form another sub-heat exchanger.
The refrigerant inlet 21 of the first refrigerant system 20 is disposed at the lower end of the bent left portion of the left heat exchanger, and the refrigerant inlet 31 of the second refrigerant system 30 is disposed at the lower end of the right heat exchanger. The refrigerant outlet 22 of the first refrigerant system 20 is disposed at the lower end of the bent right portion of the left heat exchanger, the refrigerant outlet 32 of the second refrigerant system 30 is disposed at the upper end of the right heat exchanger, and the refrigerant outlet 22 of the first refrigerant system 20 and the refrigerant outlet 32 of the second refrigerant system 30 are adjacent to each other.
As shown in fig. 12, for the heat exchanger 1 of the double-row and three-refrigerant system, the heat exchanger 1 is composed of three integral heat exchangers, one of the heat exchangers is a bent heat exchange tube, the left part and the left lower part of the bent upper heat exchanger form a sub-heat exchanger, and the right part and the heat exchanger with the lower part of the bent upper heat exchanger form another sub-heat exchanger.
The refrigerant inlet 21 of the first refrigerant system 20 is disposed at the lower end of the left lower heat exchanger, and the refrigerant inlet 41 of the third refrigerant system 40 is disposed at the lower end of the right lower heat exchanger. The refrigerant inlet 31 of the second refrigerant system 30 is disposed at the lower end of the bent left portion of the upper heat exchanger, the refrigerant outlet 22 of the first refrigerant system 20 is disposed at the upper end of the left lower heat exchanger, and the refrigerant inlet 31 of the second refrigerant system 30 and the refrigerant outlet 22 of the first refrigerant system 20 are adjacent to each other. The refrigerant outlet 32 of the second refrigerant system 30 is disposed at the lower end of the bent right portion of the upper heat exchanger, the refrigerant outlet 42 of the third refrigerant system 40 is disposed at the upper end of the right lower heat exchanger, and the refrigerant outlet 32 of the second refrigerant system 30 and the refrigerant outlet 42 of the third refrigerant system 40 are adjacent to each other.
A heat exchange system according to an embodiment of the present invention is described below.
The heat exchange system according to the embodiment of the invention comprises a plurality of compressors, heat exchangers and fans.
The heat exchanger is the heat exchanger 1 according to the above embodiment of the present invention, and the plurality of compressors and the plurality of refrigerant systems of the heat exchanger 1 are respectively communicated in a one-to-one correspondence manner to form a plurality of refrigerant circuits. The fan is used for accelerating the gas flow on the surface of the heat exchanger 1, and the gas flow direction is parallel to the thickness direction of the sub-heat exchanger.
According to the heat exchange system provided by the embodiment of the invention, the heat exchanger 1 provided by the embodiment of the invention has the advantages of high heat exchange efficiency, uniform outlet air temperature and the like.
An air conditioner according to an embodiment of the present invention including the heat exchange system according to the above-described embodiment of the present invention will be described below.
According to the air conditioner provided by the embodiment of the invention, the heat exchange system provided by the embodiment of the invention has the advantages of high heat exchange efficiency, uniform outlet air temperature and the like.
Other constructions and operations of the heat exchange system and the air conditioner according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A heat exchanger is characterized by comprising a plurality of rows of sub heat exchangers, wherein the plurality of rows of sub heat exchangers are arranged along the thickness direction of the sub heat exchangers and are parallel to each other, the heat exchanger is provided with a plurality of refrigerant systems, each refrigerant system is distributed on at least two rows of sub heat exchangers, a plurality of compressors are communicated with the plurality of refrigerant systems of the heat exchanger in a one-to-one correspondence manner to form a plurality of refrigerant loops, and one compressor is communicated with one refrigerant loop;
the refrigerant system comprises a first collecting pipe and a second collecting pipe, wherein the first collecting pipes are arranged side by side along the thickness direction of the sub-heat exchanger, the second collecting pipes are arranged side by side along the thickness direction of the sub-heat exchanger, a refrigerant inlet is formed in the first collecting pipe, a refrigerant outlet is formed in the second collecting pipe, and at least two refrigerant systems share the refrigerant inlet and the refrigerant outlet respectively;
the first collecting pipe and the second collecting pipe are internally provided with a clapboard, and in one sub-heat exchanger, the clapboard in the first collecting pipe and the clapboard in the second collecting pipe are arranged in parallel and level along the axial direction of the first collecting pipe;
or a plurality of refrigerant distribution pipes are arranged in the first collecting pipe and the second collecting pipe, the number of the refrigerant distribution pipes in each collecting pipe is consistent with that of the refrigerant systems, and each refrigerant distribution pipe is provided with a refrigerant distribution hole communicated with one refrigerant cavity;
and at least one part of the projection of the part of the same refrigerant system on any two rows of the sub heat exchangers is not overlapped in a plane which is orthogonal to the thickness direction of the sub heat exchangers.
2. The heat exchanger of claim 1, wherein each row of sub-heat exchangers comprises:
a first collecting pipe and a second collecting pipe;
and the fins are arranged between the adjacent heat exchange tubes.
3. The heat exchanger of claim 2, wherein a plurality of the refrigerant systems are divided at each of the first header and the second header.
4. The heat exchanger of claim 3, wherein the number of refrigerant chambers in each header pipe is the same as the number of refrigerant systems and the plurality of refrigerant chambers in each header pipe form part of the plurality of refrigerant systems in a one-to-one correspondence.
5. The heat exchanger of claim 4, wherein each refrigerant distribution tube within each manifold extends the entire length of the manifold, and wherein the plurality of refrigerant distribution tubes within each manifold are arranged in parallel.
6. The heat exchanger of claim 3, wherein a refrigerant inlet and a refrigerant outlet of each refrigerant system are provided on the first header and the second header.
7. The heat exchanger according to any one of claims 4 to 6, wherein the plurality of refrigerant chambers in each header are separated by a partition provided in the header.
8. The heat exchanger according to any one of claims 4 to 6, wherein each header comprises a plurality of sub-header pipes disconnected from each other, and the plurality of refrigerant chambers in the header are respectively defined by the plurality of sub-header pipes in a one-to-one correspondence.
9. The heat exchanger of claim 2, wherein a plurality of the refrigerant systems are spaced across the heat exchange tubes.
10. A heat exchange system, comprising:
a plurality of compressors;
the heat exchanger according to any one of claims 1 to 9, wherein a plurality of the compressors are communicated with a plurality of refrigerant systems of the heat exchanger in a one-to-one correspondence manner to form a plurality of refrigerant circuits, and one of the compressors is communicated with one of the refrigerant circuits;
and the fan is used for accelerating the gas flow on the surface of the heat exchanger.
11. An air conditioner comprising the heat exchange system of claim 10.
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| CN201711033339.1A CN109724235B (en) | 2017-10-30 | 2017-10-30 | Heat exchanger, heat exchange system and air conditioner |
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| CN108006941A (en) * | 2017-11-21 | 2018-05-08 | 广东美的制冷设备有限公司 | Heat-exchanger rig and air-conditioning equipment |
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| CN109724235A (en) | 2019-05-07 |
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