CN216592953U - Heat exchanger and air conditioning system with same - Google Patents
Heat exchanger and air conditioning system with same Download PDFInfo
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- CN216592953U CN216592953U CN202122705755.XU CN202122705755U CN216592953U CN 216592953 U CN216592953 U CN 216592953U CN 202122705755 U CN202122705755 U CN 202122705755U CN 216592953 U CN216592953 U CN 216592953U
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Abstract
The utility model discloses a heat exchanger and an air conditioning system with the same. The heat exchanger comprises a first heat exchanger core, a second heat exchanger core, a third heat exchanger core and a connecting part for connecting the first heat exchanger core, the second heat exchanger core and the third heat exchanger core with each other. At least a part of a first orthographic projection of the first heat exchanger core on a plane parallel to the second heat exchanger core is located within a second orthographic projection of the second heat exchanger core on the plane and at least a part of a third orthographic projection of the third heat exchanger core on the plane is located within the second orthographic projection. The lower edge of the first heat exchanger core is higher than the lower edge of the second heat exchanger core and the upper edge of the third heat exchanger core is lower than the upper edge of the second heat exchanger core. The ratio of the sum of the height of the first heat exchanger core and the height of the third heat exchanger core to the height of the second heat exchanger core is between 0.8 and 1.2. The heat exchanger improves the consistency of wind resistance and reduces the problem of water blowing.
Description
Technical Field
Embodiments of the present invention relate to a heat exchanger and an air conditioning system having the same.
Background
Heat exchangers, such as microchannel heat exchangers, typically include multiple rows of heat exchanger cores. Such a heat exchanger may be used as an evaporator.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a heat exchanger and an air conditioning system having the same, whereby, for example, the performance of the heat exchanger can be improved.
An embodiment of the present invention provides a heat exchanger, including: the heat exchanger comprises a first heat exchanger core, a second heat exchanger core and a third heat exchanger core, wherein each of the first heat exchanger core, the second heat exchanger core and the third heat exchanger core comprises a heat exchange tube; and a first connection portion and a second connection portion, the heat exchange tube of the first heat exchanger core and the heat exchange tube of the second heat exchanger core are connected by the first connection portion and are in fluid communication, and the heat exchange tube of the second heat exchanger core and the heat exchange tube of the third heat exchanger core are connected by the second connection portion and are in fluid communication, so that the heat exchange tube of the second heat exchanger core is connected between the heat exchange tube of the first heat exchanger core and the heat exchange tube of the third heat exchanger core, wherein the first heat exchanger core, the second heat exchanger core and the third heat exchanger core are arranged in the thickness direction of the heat exchanger, at least a part of a first orthographic projection of the first heat exchanger core on a plane parallel to the second heat exchanger core is located within a second orthographic projection of the second heat exchanger core on the plane, and at least a part of a third orthographic projection of the third heat exchanger core on the plane is located within a second orthographic projection of the second heat exchanger core on the plane, the lower edge of the first heat exchanger core is higher than the lower edge of the second heat exchanger core, and the upper edge of the third heat exchanger core is lower than the upper edge of the second heat exchanger core, and the ratio of the sum of the height of the first heat exchanger core and the height of the third heat exchanger core to the height of the second heat exchanger core is between 0.8 and 1.2.
According to an embodiment of the utility model, the ratio of the difference in height between the upper edge of the first heat exchanger core and the upper edge of the second heat exchanger core to the height of the second heat exchanger core is less than 20%, and the ratio of the difference in height between the lower edge of the third heat exchanger core and the lower edge of the second heat exchanger core to the height of the second heat exchanger core is less than 20%.
According to an embodiment of the utility model, the ratio of the difference in height between the upper edge of the first heat exchanger core and the upper edge of the second heat exchanger core to the height of the second heat exchanger core is less than 5%, and the ratio of the difference in height between the lower edge of the third heat exchanger core and the lower edge of the second heat exchanger core to the height of the second heat exchanger core is less than 5%.
According to an embodiment of the utility model, the sum of the height of the first heat exchanger core and the height of the third heat exchanger core is smaller than or equal to the height of the second heat exchanger core.
According to an embodiment of the utility model, the upper edge of the first heat exchanger core coincides with the upper edge of the second heat exchanger core and the lower edge of the third heat exchanger core coincides with the lower edge of the second heat exchanger core, as seen in the thickness direction of the heat exchanger.
According to an embodiment of the utility model, at least one of the first, second and third heat exchanger cores comprises a plurality of sub heat exchanger cores.
According to an embodiment of the utility model, the plurality of sub heat exchanger cores have the same dimensions.
According to an embodiment of the utility model, the heat exchanger further comprises: the wind resistance plate is positioned on one side of the heat exchanger in the thickness direction of the heat exchanger, and at least one part of the orthographic projection of the wind resistance plate on the plane parallel to the second heat exchanger core is positioned in the second orthographic projection of the second heat exchanger core on the plane, so that the difference of the wind resistance of each part of the heat exchanger in the height direction to the air passing through the heat exchanger is smaller than a preset value under the same air inlet speed.
According to an embodiment of the utility model, each of the first heat exchanger core, the second heat exchanger core and the third heat exchanger core further comprises a plurality of fins, and at the same inlet air speed, at least a part of at least one of the plurality of fins causes different windage or pressure drop from at least a part of the other fins, so that the difference of windage of each part of the heat exchanger in the height direction to the air passing through the heat exchanger is less than a predetermined value.
According to an embodiment of the utility model, each of the first, second and third heat exchanger cores further comprises fins, the density of the fins of the third heat exchanger core being greater than the density of the fins of the second heat exchanger core or the density of the fins of the first heat exchanger core.
According to an embodiment of the utility model, the first heat exchanger core and the third heat exchanger core are on opposite sides of the second heat exchanger core.
According to an embodiment of the utility model, the first heat exchanger core and the third heat exchanger core are on the same side of the second heat exchanger core.
According to an embodiment of the utility model, at least one of the first heat exchanger core and the third heat exchanger core is arranged obliquely with respect to the second heat exchanger core.
According to an embodiment of the utility model, the angle between the second heat exchanger core and the at least one of the first and third heat exchanger cores is greater than 0 degrees and less than or equal to 45 degrees.
According to an embodiment of the utility model, the first, second and third heat exchanger cores are formed by one heat exchanger core bend.
According to an embodiment of the utility model, at least one of the first and second connections is a header.
According to an embodiment of the present invention, the first heat exchanger core further includes a first header connected to and in fluid communication with the heat exchange tubes of the first heat exchanger core, and the third heat exchanger core further includes a second header connected to and in fluid communication with the heat exchange tubes of the third heat exchanger core; and one of the first heat exchanger core and the third heat exchanger core on the refrigerant outlet side of the heat exchanger further includes an outlet-side header in fluid communication with one of the first header and the second header on the refrigerant outlet side of the heat exchanger through a connecting pipe.
According to an embodiment of the utility model, the second header is at a refrigerant outlet side of the heat exchanger.
According to an embodiment of the present invention, the first heat exchanger core further comprises a first header connected to and in fluid communication with the heat exchange tubes of the first heat exchanger core, the third heat exchanger core further comprises a second header connected to and in fluid communication with the heat exchange tubes of the third heat exchanger core, and the heat exchanger further comprises a refrigerant distribution device, wherein the refrigerant distribution device is provided in one of the first header and the second header at a refrigerant inlet side of the heat exchanger; or the refrigerant distribution device is arranged outside one of the first collecting pipe and the second collecting pipe on the refrigerant inlet side of the heat exchanger and is in fluid communication with the one collecting pipe through a plurality of connecting pipes.
According to an embodiment of the utility model, the first header is at a refrigerant inlet side of the heat exchanger.
According to an embodiment of the present invention, the first heat exchanger core further includes a first header connected to and in fluid communication with the heat exchange tube of the first heat exchanger core, the third heat exchanger core further includes a second header connected to and in fluid communication with the heat exchange tube of the second heat exchanger core, and a cross-sectional area of one of the first header and the second header at a refrigerant inlet side of the heat exchanger is smaller than a cross-sectional area of the other of the first header and the second header at a refrigerant outlet side of the heat exchanger.
According to an embodiment of the utility model, the first header is at a refrigerant inlet side of the heat exchanger and the second header is at a refrigerant outlet side of the heat exchanger.
An embodiment of the present invention also provides an air conditioning system, including: the heat exchanger is described above.
According to an embodiment of the utility model, the first heat exchanger core further comprises a first header connected to and in fluid communication with the heat exchange tubes of the first heat exchanger core, the third heat exchanger core further comprises a second header connected to and in fluid communication with the heat exchange tubes of the third heat exchanger core, and the first header and the second header are arranged horizontally in use.
According to an embodiment of the utility model, at least one of the first, second and third heat exchanger cores is arranged inclined with respect to a horizontal plane.
According to an embodiment of the utility model, at least one of the first, second and third heat exchanger cores has an angle with the horizontal plane which is larger than 0 degrees and smaller than or equal to 90 degrees.
According to an embodiment of the utility model, the third heat exchanger core is located upstream of the second heat exchanger core and the second heat exchanger core is located upstream of the first heat exchanger core in the direction of air flow through the heat exchanger.
With the heat exchanger and the air conditioning system having the same according to the embodiments of the present invention, for example, the performance of the heat exchanger can be improved.
Drawings
FIG. 1 is a schematic perspective view of a heat exchanger according to an embodiment of the present invention;
FIG. 2 is a schematic front view of the heat exchanger shown in FIG. 1;
FIG. 3 is a schematic side view of the heat exchanger shown in FIG. 1;
FIG. 4 is a schematic side view of a heat exchanger according to one variation of an embodiment of the present invention;
FIG. 5 is a schematic side view of a heat exchanger according to another variation of an embodiment of the present invention;
FIG. 6 is a schematic side view of a heat exchanger according to yet another variation of an embodiment of the present invention;
FIG. 7 is a schematic side view of a heat exchanger according to yet another variation of an embodiment of the present invention;
fig. 8 is a schematic side view of a heat exchanger according to a variant of the embodiment of the utility model, in which the second heat exchanger core and the third heat exchanger core are connected by a header as a second connection;
FIG. 9 is a schematic side view of a heat exchanger according to a variation of the embodiment of the present invention, wherein the first heat exchanger core and the third heat exchanger core are on the same side of the second heat exchanger core;
FIG. 10 is a schematic side view of a heat exchanger according to a variation of an embodiment of the present invention, wherein each of the first and third heat exchanger cores comprises a plurality of sub heat exchanger cores;
FIG. 11 is a schematic side view of a heat exchanger according to a variation of an embodiment of the present invention, wherein each of the first, second and third heat exchanger cores comprises a plurality of sub-heat exchanger cores;
FIG. 12 is a schematic side view of a heat exchanger according to an embodiment of the utility model, wherein the heat exchanger is placed inclined in use;
fig. 13 is a schematic perspective view of a portion of a heat exchanger according to an embodiment of the present invention, with a header cut away to show a refrigerant distribution device;
FIG. 14 is a schematic front view of the portion of the heat exchanger shown in FIG. 13 with the header broken away;
FIG. 15 is a schematic side view of the portion of the heat exchanger shown in FIG. 13;
FIG. 16 is a schematic perspective view of a portion of a heat exchanger showing a refrigerant distribution device according to an embodiment of the present invention;
FIG. 17 is a schematic front view of the portion of the heat exchanger shown in FIG. 16; and
fig. 18 is a schematic side view of a portion of the heat exchanger shown in fig. 16.
Detailed Description
The utility model is further described with reference to the following drawings and detailed description.
An air conditioning system according to an embodiment of the present invention includes a heat exchanger. Specifically, the air conditioning system according to the embodiment of the present invention includes a compressor, a heat exchanger as an evaporator, a heat exchanger as a condenser, an expansion valve, and the like.
Referring to fig. 1 to 18, a heat exchanger 100 according to an embodiment of the present invention includes: the heat exchanger comprises a first heat exchanger core 1, a second heat exchanger core 2 and a third heat exchanger core 3, wherein each of the first heat exchanger core 1, the second heat exchanger core 2 and the third heat exchanger core 3 comprises a heat exchange tube 8; and a first connection portion 51 and a second connection portion 52, the heat exchange tube 8 of the first heat exchanger core 1 and the heat exchange tube 8 of the second heat exchanger core 2 are connected by the first connection portion 51 and are in fluid communication, and the heat exchange tube 8 of the second heat exchanger core 2 and the heat exchange tube 8 of the third heat exchanger core 3 are connected by the second connection portion 52 and are in fluid communication, so that the heat exchange tube 8 of the second heat exchanger core 2 is connected between the heat exchange tube 8 of the first heat exchanger core 1 and the heat exchange tube 8 of the third heat exchanger core 3. The first heat exchanger core 1, the second heat exchanger core 2, and the third heat exchanger core 3 are arranged in the thickness direction (left-right direction in fig. 3 to 11) of the heat exchanger 100, at least a part (e.g., substantially all) of a first orthographic projection of the first heat exchanger core 1 on a plane parallel to the second heat exchanger core 2 is located within a second orthographic projection of the second heat exchanger core 2 on the plane, and at least a part (e.g., substantially all) of a third orthographic projection of the third heat exchanger core 3 on the plane is located within a second orthographic projection of the second heat exchanger core 2 on the plane, a lower edge 1D of the first heat exchanger core 1 is higher than a lower edge 2D of the second heat exchanger core 2, and an upper edge 3U of the third heat exchanger core 3 is lower than an upper edge 2U of the second heat exchanger core 2, a ratio of a sum of a height of the first heat exchanger core 1 and a height of the third heat exchanger core 3 to a height of the second heat exchanger core 2 is between 0.8 and 1.2 .
Referring to fig. 1 to 12, in the embodiment of the present invention, the ratio of the height difference between the upper edge 1U of the first heat exchanger core 1 and the upper edge 2U of the second heat exchanger core 2 to the height of the second heat exchanger core 2 is less than 20%, and the ratio of the height difference between the lower edge 3D of the third heat exchanger core 3 and the lower edge 2D of the second heat exchanger core 2 to the height of the second heat exchanger core 2 is less than 20%. For example, the ratio of the height difference between the upper edge 1U of the first heat exchanger core 1 and the upper edge 2U of the second heat exchanger core 2 to the height of the second heat exchanger core 2 is less than 5%, and the ratio of the height difference between the lower edge 3D of the third heat exchanger core 3 and the lower edge 2D of the second heat exchanger core 2 to the height of the second heat exchanger core 2 is less than 5%. In the illustrated example, the upper edge 1U of the first heat exchanger core 1 coincides with the upper edge 2U of the second heat exchanger core 2, and the lower edge 3D of the third heat exchanger core 3 coincides with the lower edge 2D of the second heat exchanger core 2, as viewed in the thickness direction of the heat exchanger.
Referring to fig. 10 to 11, in an embodiment of the utility model at least one of the first 1, second 2 and third 3 heat exchanger cores comprises a plurality of sub heat exchanger cores 7. The plurality of sub heat exchanger cores 7 may have the same dimensions. In the embodiment shown in fig. 10, each of the first heat exchanger core 1 and the third heat exchanger core 3 comprises 3 sub heat exchanger cores 7, whereas in the embodiment shown in fig. 11, each of the first heat exchanger core 1, the second heat exchanger core 2 and the third heat exchanger core 3 comprises 3 sub heat exchanger cores 7. At least one of the first 1, second 2 and third 3 heat exchanger cores may comprise any number of sub heat exchanger cores 7.
In an embodiment of the present invention, the heat exchanger 100 further comprises: and the wind resistance plate is positioned on one side of the heat exchanger 100 in the thickness direction of the heat exchanger 100, and at least one part of the orthographic projection of the wind resistance plate on the plane parallel to the second heat exchanger core 2 is positioned in the second orthographic projection of the second heat exchanger core 2 on the plane, so that the difference of the wind resistance of each part of the heat exchanger 100 in the height direction to the air passing through the heat exchanger 100 under the same air inlet speed is smaller than a preset value.
Referring to fig. 1, 2, in an embodiment of the present invention, each of the first, second and third heat exchanger cores 1, 2, 3 further comprises a plurality of fins 9. The plurality of fins 9 and the plurality of heat exchange tubes 8 may be alternately arranged. In the case where the first, second and third heat exchanger cores 1, 2 and 3 are vertically disposed, the heat exchange tubes 8 may extend substantially vertically. At the same inlet wind speed, the windage or pressure drop caused by at least one part of at least one fin 9 of the plurality of fins 9 is different from the windage or pressure drop caused by at least one part of the other fins 9, so that the difference of the windage of each part of the heat exchanger 100 in the height direction to the air passing through the heat exchanger 100 at the same inlet wind speed is smaller than a predetermined value, for example, the difference is substantially equal to zero.
It should be noted that "under the same wind speed" does not mean that the wind speeds of the wind entering the heat exchanger 100 in the height direction must be the same when the heat exchanger is in use, but means that the difference between the wind resistances of the heat exchanger to the parts passing through the heat exchanger 100 in the height direction needs to be measured and compared under the condition that the wind speeds of the wind entering the heat exchanger are the same.
The "predetermined value" may be a difference between windage resistances of the heat exchanger to each portion in the height direction of the heat exchanger 100 at the same wind speed when the heat exchange tubes and the fin structures of the first heat exchanger core 1, the second heat exchanger core 2, and the third heat exchanger core 3 are the same and no windage plate is installed.
Referring to fig. 1, 2, in an embodiment of the present invention, the density of the fins 9 of the third heat exchanger core 3 may be greater than the density of the fins 9 of the second heat exchanger core 2 or the density of the fins 9 of the first heat exchanger core 1. For the corrugated fins shown in fig. 1 and 2, the density of the fins may be the number of peaks or valleys per unit length of the wave. If the fins are plate-like fins through which the heat exchange tube passes, the fin density means the number of fins per unit length perpendicular to the plane in which the fins extend.
Referring to fig. 1 to 8, 10 to 12, in an embodiment of the utility model, the first heat exchanger core 1 and the third heat exchanger core 3 are on opposite sides of the second heat exchanger core 2, respectively. Referring to fig. 9, the first heat exchanger core 1 and the third heat exchanger core 3 may also be on the same side of the second heat exchanger core 2.
Referring to fig. 1 to 12, in an embodiment of the present invention, at least one of the first heat exchanger core 1 and the third heat exchanger core 3 may be disposed obliquely with respect to the second heat exchanger core 2. The angle between the at least one of the first and third heat exchanger cores 1, 3 and the second heat exchanger core 2 may be greater than 0 degrees and less than or equal to 45 degrees.
Referring to fig. 1 to 12, in the embodiment of the present invention, the first connection part 51 includes a first connection pipe 510, and the second connection part 52 includes a second connection pipe 520. The heat exchange tubes of two connected heat exchanger cores may or may not be connected in a one-to-one correspondence. Furthermore, the first heat exchanger core 1, the second heat exchanger core 2 and the third heat exchanger core 3 may be formed by bending one heat exchanger core. Thereby, the bent portions of the heat exchange pipe constitute the first connection portion 51 and the second connection portion 52. Further, at least one of the first connection portion 51 and the second connection portion 52 is a header. In the embodiment shown in fig. 8, the second connection 52 is a header. The refrigerant is mixed again in the header cavity and then distributed into the heat exchange tubes 8 of the third heat exchanger core 3, so that the refrigerant distribution is more uniform, and the effective utilization of the heat exchange area is realized.
Referring to fig. 1 to 3, 6, 9, 12, in an embodiment of the present invention, the first heat exchanger core 1 further comprises a first header 61 connected to and in fluid communication with the heat exchange tubes 8 of the first heat exchanger core 1; the third heat exchanger core 3 further comprises a second header 62 connected to and in fluid communication with the heat exchange tube 8 of the third heat exchanger core 3, and one of the first heat exchanger core 1 and the third heat exchanger core 3 on the refrigerant outlet side of the heat exchanger 100 further comprises an outlet side header 63 in fluid communication with one of the first header 61 and the second header 62 on the refrigerant outlet side of the heat exchanger 100 via a connecting tube 42, for example, by means of one or more connecting tubes fluidly connecting the outlet side header 63 to the one header via one or more openings through a tube wall of the outlet side header 63 and one or more openings through a tube wall of the one header. The outlet-side header 63 may extend in the same general direction as the one header. In the illustrated embodiment, the third heat exchanger core 3 is on the refrigerant outlet side of the heat exchanger 100, and the second header 62 is on the refrigerant outlet side of the heat exchanger 100. For example, the outlet side header 63 is in fluid communication with the second header 62 with one or more connecting tubes through one or more openings through the tube wall of the outlet side header 63 and one or more openings through the tube wall of the second header 62. The outlet-side header 63 and the second header 62 may extend in substantially the same direction.
Referring to fig. 13 to 18, in an embodiment of the present invention, the heat exchanger 100 further includes: the refrigerant distributing device 4, see fig. 13 to 15, is provided in one of the first header 61 and the second header 62 on the refrigerant inlet side of the heat exchanger 100. Referring to fig. 16 to 18, the refrigerant distribution device 4 may also be disposed outside one of the first header 61 and the second header 62 on the refrigerant inlet side of the heat exchanger 100, and is in fluid communication with the one header through a plurality of connection pipes 41. The distributor pipe is in fluid communication with the one collecting main by means of one or more connecting pipes, for example by one or more openings through the pipe wall of the distributor pipe as refrigerant distribution device 4 and one or more openings through the pipe wall of the one collecting main. The distribution pipe and the one collecting pipe may extend in substantially the same direction. Referring to fig. 13-18, in the illustrated embodiment, the first header 61 is on the refrigerant inlet side of the heat exchanger 100. The distributor pipe is in fluid communication with the first header 61 by means of one or more connecting pipes, for example by means of one or more openings through the pipe wall of the distributor pipe being the refrigerant distribution device 4 and one or more openings through the pipe wall of the first header 61. The distribution pipe and the first collecting pipe 61 may extend in substantially the same direction
Referring to fig. 4 to 9, in the embodiment of the present invention, the cross-sectional area of one of the first header 61 and the second header 62 on the refrigerant inlet side of the heat exchanger 100 is smaller than the cross-sectional area of the other of the first header 61 and the second header 62 on the refrigerant outlet side of the heat exchanger 100. Referring to fig. 4-9, in the illustrated embodiment, the first header 61 is on a refrigerant inlet side of the heat exchanger 100 and the second header 62 is on a refrigerant outlet side of the heat exchanger 100.
Referring to fig. 1 to 12, in an embodiment of the present invention, in an air conditioning system, a first header 61 and a second header 62 are horizontally arranged in use. Referring to fig. 12, at least one of the first heat exchanger core 1, the second heat exchanger core 2 and the third heat exchanger core 3 is arranged obliquely with respect to the horizontal plane. For example, each of the first heat exchanger core 1, the second heat exchanger core 2, and the third heat exchanger core 3 is arranged obliquely with respect to the horizontal plane. At least one of the first 1, second 2 and third 3 heat exchanger cores may be at an angle greater than 0 degrees and less than or equal to 90 degrees to the horizontal. Condensate from the heat exchanger 100 drips down into the drip tray 38. The third heat exchanger core 3 is located upstream of the second heat exchanger core 2, and the second heat exchanger core 2 is located upstream of the first heat exchanger core 1 in the direction of air flow through the heat exchanger 100.
In the embodiment shown in fig. 4, the sum of the height of the first heat exchanger core 1 and the height of the third heat exchanger core 3 corresponds to the height of the second heat exchanger core 2. The first heat exchanger core 1 and the third heat exchanger core 3 are on opposite sides of the second heat exchanger core 2, respectively. When an air conditioning system comprising the heat exchanger operates, the first heat exchanger core 1 is a leeward heat exchanger core, the third heat exchanger core 3 is a windward heat exchanger core, refrigerant enters the heat exchanger 100 from the collecting pipe 61 of the first heat exchanger core 1, flows out of the heat exchanger 100 from the collecting pipe 62 of the third heat exchanger core 3 through the second heat exchanger core 2, and air exchanges heat with the heat exchanger 100 from the right side and sequentially flows through the third heat exchanger core 3, the second heat exchanger core 2 and the first heat exchanger core 1. The low-temperature refrigerant firstly enters the first heat exchanger core 1 to exchange heat with air, then enters the second heat exchanger core 2, and finally enters the third heat exchanger core 3. In this process, the refrigerant gradually increases in temperature, and then flows out from the header 62 of the third heat exchanger core 3 in a superheated gas state. Since the refrigerant temperature of the first heat exchanger core 1 is low, condensation water is more likely to be formed by condensation of air in the heat exchange process with air, and thus the amount of condensation water in the first heat exchanger core 1 is greater than that in the third heat exchanger core 3. Since the amount of heat exchange of the third heat exchanger core 3 is small, the amount of condensed water generated by the third heat exchanger core 3 is small. Further, the heat exchanger 100 may be divided into an upper portion and a lower portion in the height direction, the upper portion being a double-row structure constituted by the corresponding upper portions of the first and second heat exchanger cores 1 and 2, and the lower portion being a double-row structure constituted by the corresponding lower portions of the third and second heat exchanger cores 3 and 2. Under the condition that the heat exchange tubes and the fins of the heat exchanger are consistent in structure, the wind resistance of the upper part is consistent with that of the lower part. Therefore, the problem of water blowing of the heat exchanger caused by low wind resistance of the lower part can be effectively reduced.
In the embodiment shown in fig. 5, the sum of the height of the first heat exchanger core 1 and the height of the third heat exchanger core 3 is smaller than the height of the second heat exchanger core 2. The first heat exchanger core 1 and the third heat exchanger core 3 are on opposite sides of the second heat exchanger core 2, respectively. When an air conditioning system comprising the heat exchanger operates, the first heat exchanger core 1 is a leeward heat exchanger core, the third heat exchanger core 3 is a windward heat exchanger core, refrigerant enters the heat exchanger 100 from the collecting pipe 61 of the first heat exchanger core 1, flows out of the heat exchanger 100 from the collecting pipe 62 of the third heat exchanger core 3 through the second heat exchanger core 2, and air exchanges heat with the heat exchanger 100 from the right side and sequentially flows through the third heat exchanger core 3, the second heat exchanger core 2 and the first heat exchanger core 1. The low-temperature refrigerant firstly enters the first heat exchanger core 1 to exchange heat with air, then enters the second heat exchanger core 2, and finally enters the third heat exchanger core 3. In this process, the refrigerant gradually increases in temperature, and then flows out from the header 62 of the third heat exchanger core 3 in a superheated gas state. Since the refrigerant temperature of the first heat exchanger core 1 is low, condensation water is more likely to be formed by condensation of air in the heat exchange process with air, and thus the amount of condensation water in the first heat exchanger core 1 is greater than that in the third heat exchanger core 3. Since the amount of heat exchange of the third heat exchanger core 3 is small, the amount of condensed water generated by the third heat exchanger core 3 is small. Further, the heat exchanger 100 may be divided in the height direction into an upper portion, a middle portion, and a lower portion, the upper portion being a double-row structure constituted by the respective upper portions of the first heat exchanger core 1 and the second heat exchanger core 2, the middle portion being a single-row structure constituted by the respective middle portions of the second heat exchanger core 2, and the lower portion being a double-row structure constituted by the third heat exchanger core 3 and the respective lower portions of the second heat exchanger core 2, in which case the heat exchange tubes and the fin structures of the heat exchanger are identical, the wind resistance of the upper portion is identical to that of the lower portion, but greater than that of the middle portion. In this case, the wind speed of the middle portion is greater than the wind speeds of the upper and lower portions, and when the ratio of the height of the middle portion to the height of the entire heat exchanger is less than or equal to 20%, the wind speed of the air passing through the middle portion is not significantly increased, so that the problem of water blowing of the heat exchanger due to the lower wind resistance of the lower portion can be effectively reduced. In order to keep the wind resistance of the upper part, the middle part and the lower part of the heat exchanger consistent, the wind resistance can be increased by means of high-density fins or wind resistance plates and the like in the corresponding area of the middle part.
In the embodiment shown in fig. 6, the sum of the height of the first heat exchanger core 1 and the height of the third heat exchanger core 3 is greater than the height of the second heat exchanger core 2. The first heat exchanger core 1 and the third heat exchanger core 3 are on opposite sides of the second heat exchanger core 2, respectively. When an air conditioning system comprising the heat exchanger operates, the first heat exchanger core 1 is a leeward heat exchanger core, the third heat exchanger core 3 is a windward heat exchanger core, refrigerant enters the heat exchanger 100 from the collecting pipe 61 of the first heat exchanger core 1, flows out of the heat exchanger 100 from the collecting pipe 62 of the third heat exchanger core 3 through the second heat exchanger core 2, and air exchanges heat with the heat exchanger 100 from the right side and sequentially flows through the third heat exchanger core 3, the second heat exchanger core 2 and the first heat exchanger core 1. The low-temperature refrigerant firstly enters the first heat exchanger core 1 to exchange heat with air, then enters the second heat exchanger core 2, and finally enters the third heat exchanger core 3. In this process, the refrigerant gradually increases in temperature, and then flows out from the header 62 of the third heat exchanger core 3 in a superheated gas state. Since the refrigerant temperature of the first heat exchanger core 1 is low, condensation water is more likely to be formed by condensation of air in the heat exchange process with air, and thus the amount of condensation water in the first heat exchanger core 1 is greater than that in the third heat exchanger core 3. Since the amount of heat exchange of the third heat exchanger core 3 is small, the amount of condensed water generated by the third heat exchanger core 3 is small. Further, the heat exchanger 100 may be divided into an upper portion, a middle portion, and a lower portion in the height direction, the upper portion being a double-row structure constituted by the upper portion of the first heat exchanger core 1 and the upper portion of the second heat exchanger core 2, the middle portion being a three-row structure constituted by the lower portion of the first heat exchanger core 1, the middle portion of the second heat exchanger core 2, and the upper portion of the third heat exchanger core 3, and the lower portion being a double-row structure constituted by the lower portion of the third heat exchanger core 3 and the lower portion of the second heat exchanger core 2, in the case where the heat exchange tubes and the fin structures of the heat exchanger are identical, the windage of the upper portion is identical to the windage of the lower portion, but is smaller than the windage of the middle portion. In this case, the wind speed of the middle portion is less than the wind speeds of the upper and lower portions, and when the ratio of the height of the middle portion to the height of the entire heat exchanger is less than or equal to 20%, the wind speed of the air passing through the lower portion is not significantly increased, so that the problem of water blowing of the heat exchanger due to the lower wind resistance of the lower portion can be effectively reduced. In order to keep the wind resistance of the upper part, the middle part and the lower part of the heat exchanger consistent, the wind resistance can be increased by means of high-density fins or wind resistance plates and the like in the corresponding areas of the upper part and the lower part.
The heat exchanger provided by the utility model can be used for solving the problem of water blowing of the air conditioning system and simultaneously can be matched with the capacity requirement of the air conditioning system.
While the above embodiments have been described, some of the features of the above embodiments may be combined to form new embodiments.
Claims (27)
1. A heat exchanger, characterized by comprising:
the heat exchanger comprises a first heat exchanger core, a second heat exchanger core and a third heat exchanger core, wherein each of the first heat exchanger core, the second heat exchanger core and the third heat exchanger core comprises a heat exchange tube; and
the heat exchange tube of the first heat exchanger core is connected with and in fluid communication with the heat exchange tube of the second heat exchanger core through the first connecting part, and the heat exchange tube of the second heat exchanger core is connected with and in fluid communication with the heat exchange tube of the third heat exchanger core through the second connecting part, so that the heat exchange tube of the second heat exchanger core is connected between the heat exchange tube of the first heat exchanger core and the heat exchange tube of the third heat exchanger core,
wherein the first heat exchanger core, the second heat exchanger core and the third heat exchanger core are arranged in the thickness direction of the heat exchanger, at least a part of a first orthographic projection of the first heat exchanger core on a plane parallel to the second heat exchanger core is positioned within a second orthographic projection of the second heat exchanger core on the plane, at least a part of a third orthographic projection of the third heat exchanger core on the plane is positioned within a second orthographic projection of the second heat exchanger core on the plane, a lower edge of the first heat exchanger core is higher than a lower edge of the second heat exchanger core, and an upper edge of the third heat exchanger core is lower than an upper edge of the second heat exchanger core, and a ratio of a sum of a height of the first heat exchanger core and a height of the third heat exchanger core to the height of the second heat exchanger core is between 0.8 and 1.2.
2. The heat exchanger of claim 1, wherein:
the ratio of the height difference between the upper edge of the first heat exchanger core and the upper edge of the second heat exchanger core to the height of the second heat exchanger core is less than 20%, and the ratio of the height difference between the lower edge of the third heat exchanger core and the lower edge of the second heat exchanger core to the height of the second heat exchanger core is less than 20%.
3. The heat exchanger of claim 2, wherein:
the ratio of the height difference between the upper edge of the first heat exchanger core and the upper edge of the second heat exchanger core to the height of the second heat exchanger core is less than 5%, and the ratio of the height difference between the lower edge of the third heat exchanger core and the lower edge of the second heat exchanger core to the height of the second heat exchanger core is less than 5%.
4. The heat exchanger of claim 1, wherein:
the sum of the height of the first heat exchanger core and the height of the third heat exchanger core is less than or equal to the height of the second heat exchanger core.
5. The heat exchanger of claim 1, wherein:
when viewed in the thickness direction of the heat exchanger, the upper edge of the first heat exchanger core coincides with the upper edge of the second heat exchanger core, and the lower edge of the third heat exchanger core coincides with the lower edge of the second heat exchanger core.
6. The heat exchanger of claim 1, wherein:
at least one of the first, second, and third heat exchanger cores comprises a plurality of sub-heat exchanger cores.
7. The heat exchanger of claim 6, wherein:
the plurality of sub heat exchanger cores have the same size.
8. The heat exchanger of claim 1, further comprising:
and at least one part of the orthographic projection of the wind resistance plate on the plane parallel to the second heat exchanger core is positioned in the second orthographic projection of the second heat exchanger core on the plane, so that the difference of the wind resistance of each part of the heat exchanger in the height direction to the air passing through the heat exchanger under the same inlet wind speed is smaller than a preset value.
9. The heat exchanger of claim 1, wherein:
each of the first heat exchanger core, the second heat exchanger core and the third heat exchanger core further comprises a plurality of fins, and at the same air inlet speed, the wind resistance or the pressure drop caused by at least one part of at least one fin in the plurality of fins is different from the wind resistance or the pressure drop caused by at least one part of other fins, so that the difference of the wind resistance of each part of the heat exchanger in the height direction to the air passing through the heat exchanger is smaller than a preset value.
10. The heat exchanger of claim 1, wherein:
each of the first, second, and third heat exchanger cores further comprises fins, the density of the fins of the third heat exchanger core being greater than the density of the fins of the second heat exchanger core or the density of the fins of the first heat exchanger core.
11. The heat exchanger of claim 1, wherein:
the first and third heat exchanger cores are on opposite sides of the second heat exchanger core, respectively.
12. The heat exchanger of claim 1, wherein:
the first heat exchanger core and the third heat exchanger core are on the same side of the second heat exchanger core.
13. The heat exchanger of claim 1, wherein:
at least one of the first heat exchanger core and the third heat exchanger core is arranged obliquely with respect to the second heat exchanger core.
14. The heat exchanger of claim 13, wherein:
an angle between the second heat exchanger core and the at least one of the first and third heat exchanger cores is greater than 0 degrees and less than or equal to 45 degrees.
15. The heat exchanger of claim 1, wherein:
the first heat exchanger core, the second heat exchanger core and the third heat exchanger core are formed by bending one heat exchanger core.
16. The heat exchanger of claim 1, wherein:
at least one of the first and second connections is a header.
17. The heat exchanger of claim 1, wherein:
the first heat exchanger core further comprises a first header connected to and in fluid communication with the heat exchange tubes of the first heat exchanger core,
the third heat exchanger core further comprises a second header connected and in fluid communication with the heat exchange tubes of the third heat exchanger core, and
the one of the first heat exchanger core and the third heat exchanger core on the refrigerant outlet side of the heat exchanger further includes an outlet-side header in fluid communication with the one of the first header and the second header on the refrigerant outlet side of the heat exchanger through a connecting pipe.
18. The heat exchanger of claim 17, wherein:
the second collecting pipe is arranged on the refrigerant outlet side of the heat exchanger.
19. The heat exchanger of claim 1, wherein:
the first heat exchanger core further comprises a first header connected to and in fluid communication with the heat exchange tubes of the first heat exchanger core,
the third heat exchanger core further comprises a second header connected and in fluid communication with the heat exchange tubes of the third heat exchanger core, and
the heat exchanger further comprises a refrigerant distribution device, wherein the refrigerant distribution device is arranged in one of the first collecting pipe and the second collecting pipe on the refrigerant inlet side of the heat exchanger; or the refrigerant distribution device is arranged outside one of the first collecting pipe and the second collecting pipe on the refrigerant inlet side of the heat exchanger and is in fluid communication with the one collecting pipe through a plurality of connecting pipes.
20. The heat exchanger of claim 19, wherein:
the first collecting pipe is arranged on the refrigerant inlet side of the heat exchanger.
21. The heat exchanger of claim 1, wherein:
the first heat exchanger core further comprises a first header connected to and in fluid communication with the heat exchange tubes of the first heat exchanger core,
the third heat exchanger core further comprises a second header connected and in fluid communication with the heat exchange tubes of the second heat exchanger core, and
one of the first and second headers on a refrigerant inlet side of the heat exchanger has a smaller cross-sectional area than the other of the first and second headers on a refrigerant outlet side of the heat exchanger.
22. The heat exchanger of claim 21, wherein:
the first header is on a refrigerant inlet side of the heat exchanger and the second header is on a refrigerant outlet side of the heat exchanger.
23. An air conditioning system characterized by comprising:
the heat exchanger of claim 1.
24. The air conditioning system of claim 23, wherein:
the first heat exchanger core further comprises a first header connected to and in fluid communication with the heat exchange tubes of the first heat exchanger core, the third heat exchanger core further comprises a second header connected to and in fluid communication with the heat exchange tubes of the third heat exchanger core, and the first header and the second header are arranged horizontally in use.
25. The air conditioning system of claim 23, wherein:
at least one of the first, second and third heat exchanger cores is arranged inclined with respect to a horizontal plane.
26. The air conditioning system of claim 25, wherein:
at least one of the first heat exchanger core, the second heat exchanger core and the third heat exchanger core forms an included angle with a horizontal plane, which is larger than 0 degree and smaller than or equal to 90 degrees.
27. The air conditioning system of claim 23, wherein:
the third heat exchanger core is located upstream of the second heat exchanger core, and the second heat exchanger core is located upstream of the first heat exchanger core in a direction of air flow through the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122705755.XU CN216592953U (en) | 2021-11-05 | 2021-11-05 | Heat exchanger and air conditioning system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122705755.XU CN216592953U (en) | 2021-11-05 | 2021-11-05 | Heat exchanger and air conditioning system with same |
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| Publication Number | Publication Date |
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| CN216592953U true CN216592953U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122705755.XU Active CN216592953U (en) | 2021-11-05 | 2021-11-05 | Heat exchanger and air conditioning system with same |
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| Country | Link |
|---|---|
| CN (1) | CN216592953U (en) |
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2021
- 2021-11-05 CN CN202122705755.XU patent/CN216592953U/en active Active
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