CN115808032A

CN115808032A - Subcooler

Info

Publication number: CN115808032A
Application number: CN202111088982.0A
Authority: CN
Inventors: 田帆; 李宁; 马剑
Original assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Current assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2023-03-17

Abstract

The application discloses subcooler includes: the collecting pipe assembly comprises a first collecting pipe and a second collecting pipe, and the first collecting pipe and the second collecting pipe are arranged side by side along a first direction; the laminated assembly comprises at least one first flat pipe and at least one second flat pipe which are arranged in a laminated mode; the first flat pipe is communicated with the first collecting pipe, and the second flat pipe is communicated with the second collecting pipe; the first direction is intersected with the length direction of the first flat pipe, and the central axis of at least one of the first collecting pipe and the second collecting pipe is intersected with the flat surface of at least one of the first flat pipe and the second flat pipe. On the basis that the pipe diameter of the collecting pipe assembly is not increased, the collecting pipe assembly with the same length can arrange more paths of first flat pipes and second flat pipes, and therefore the heat exchange efficiency of the subcooler is improved.

Description

Subcooler

Technical Field

The application belongs to the technical field of air conditioners, and particularly relates to a subcooler.

Background

The refrigerant circulating system for the air conditioner generally adopts an economizer to increase the supercooling degree of an outlet of a condenser, and the economizer throttles and evaporates through a refrigerant to absorb heat so as to supercool the other part of the refrigerant, improve the refrigerating capacity of the refrigerant in unit mass and improve the capacity and the energy efficiency of a refrigerating system. At present, a plate heat exchanger is mostly adopted in an air conditioning system to be used as an economizer, and compared with the plate heat exchanger, the microchannel subcooler has more advantages in the aspects of performance and cost. However, in the prior art, the micro-channel subcooler still has the problem of low heat exchange efficiency.

Disclosure of Invention

The application provides a subcooler to solve the technical problem that current subcooler heat exchange efficiency is low.

In order to solve the technical problem, the application adopts a technical scheme that: a subcooler, comprising: the collecting pipe assembly comprises a first collecting pipe and a second collecting pipe, and the first collecting pipe and the second collecting pipe are arranged side by side along a first direction; the laminated assembly comprises at least one first flat pipe and at least one second flat pipe which are arranged in a laminated mode; the first flat pipe is communicated with the first collecting pipe, and the second flat pipe is communicated with the second collecting pipe; the first direction intersects with the length direction of the stacked assembly, and a central axis of at least one of the first collecting pipe and the second collecting pipe intersects with a flat surface of at least one of the first flat pipe and the second flat pipe.

The beneficial effect of this application is: by intersecting the central axis of at least one of the first header and the second header with the flat faces of at least one of the first flat tube and the second flat tube, the central axis of the header assembly is not parallel to the flat faces of the stacked assembly. The thickness of the first flat pipe and the second flat pipe is smaller than the width of the plane where the first flat pipe and the second flat pipe are located, on the basis that the pipe diameter of the collecting pipe assembly is not increased, more paths of the first flat pipe and the second flat pipe can be arranged on the collecting pipe assembly with the same length, and therefore the heat exchange efficiency of the subcooler is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic view of the overall configuration of an embodiment of a subcooler of the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application;

FIG. 4 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application;

FIG. 5 is a schematic view of the overall construction of yet another embodiment of the subcooler of the present application;

FIG. 6 is an enlarged view of portion B of FIG. 5;

fig. 7 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application;

FIG. 8 is a schematic view of the overall structure of yet another embodiment of a subcooler of the present application;

fig. 9 is an enlarged view of portion C of fig. 8;

FIG. 10 is a cross-sectional structural schematic of yet another embodiment of a subcooler of the present application;

fig. 11 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 to 4, fig. 1 is a schematic view of an overall structure of an embodiment of a subcooler of the present application; FIG. 2 is an enlarged view of portion A of FIG. 1; FIG. 3 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application; fig. 4 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application.

An embodiment of the present application provides a subcooler 100 including a header assembly 110 and a stack 120, the header assembly 110 including a first header 111 and a second header 112. Stack assembly 120 includes at least one first flat tube 121 and at least one second flat tube 122 that are arranged in a stack. The first flat pipe 121 is communicated with the first collecting pipe 111, and the second flat pipe 122 is communicated with the second collecting pipe 112. Specifically, a plurality of first microchannels are formed in the first flat tube 121, a first refrigerant flow flows through the first microchannels, a plurality of second microchannels are formed in the second flat tube 122, and a second refrigerant flow flows through the second microchannels. A first heat exchange channel is formed in the first header 111, and the first header channel is configured to provide a first refrigerant flow to the plurality of first microchannels and/or collect the first refrigerant flow flowing through the plurality of first microchannels. A second heat exchange channel is formed in the second header 112, and the second header channel is configured to provide a second refrigerant flow to the second microchannels and/or collect the second refrigerant flow flowing through the second microchannels. The first refrigerant flow flowing through the first microchannels is subjected to heat exchange with the second refrigerant flow flowing through the second microchannels.

The central axis of at least one of the first header 111 and the second header 112 intersects with the flat surface of at least one of the first flat tube 121 and the second flat tube 122. The method specifically comprises the following steps: the flat 1211 of the first flat tube 121 intersects the center axis X of the first header 111, and/or the flat 1221 of the second flat tube 122 intersects the second header 112. That is, the central axis X of the first header 111 is not parallel to the flat 1211 of the first flat tube 121 and/or the second header 112 is not parallel to the flat 1221 of the second flat tube 122. Due to the thickness of the first flat tube 121 and the second flat tube 122, the width of the flat surface of the first flat tube 121 and the second flat tube 122 is greatly smaller. Through setting up the axis of at least one of the axis of first pressure manifold 111 and second pressure manifold 112 and the flat face of at least one of first flat pipe 121 and the flat pipe 122 of second, crossing, on the basis that does not increase the pressure manifold pipe diameter, the manifold subassembly 110 of the same length can arrange more multichannel first flat pipe 121 and the flat pipe 122 of second, and then improve subcooler 100's heat exchange efficiency.

Specifically, the central axis of at least one of the central axes of the first header 111 and the second header 112 intersects with the flat surface of at least one of the first flat tube 121 and the second flat tube 122, and an included angle at the intersection may be 0 ° to 180 °, for example, 30 °, 60 °, 90 °, 120 °, or 150 °, and the like, which is not limited herein; of course, the angle of intersection is typically between 80 ° and 90 ° to facilitate the arrangement of multiple paths of the first flat tube 121 and the second flat tube 122. The flat surface 1211 of the first flat tube 121 is intersected with the central axis X of the first collecting tube 111, and the length of the first flat tube 121 in the central axis direction of the first collecting tube 111 is shorter than the length of the flat surface 1211 of the first flat tube 121 when the flat surface 1211 is parallel to the central axis X of the first collecting tube 111. The flat surfaces 1221 of the second flat tubes 122 are intersected with the central axis of the second collecting pipe 111, and the length of the second flat tubes 122 in the central axis direction of the second collecting pipe 112 is shorter than the length of the flat surfaces 1221 of the second flat tubes 122 in the direction parallel to the second collecting pipe 112. Therefore, the collecting pipe assembly 110 with the same length can be provided with more paths of the first flat pipe 121 and the second flat pipe 122, and the heat exchange efficiency of the subcooler 100 is further improved.

Preferably, the first header 111 and the second header 112 are parallel to each other to extend in the same direction. The first collecting pipe 111 and the second collecting pipe 112 do not interfere with each other, the structure is compact and regular, and the installation is facilitated.

Preferably, the flat plane of first flat pipe 121 and the flat pipe 122 of second is parallel to each other to the area of contact of the first flat pipe 121 and the flat pipe 122 of second of range upon range of setting is bigger, and first flat pipe 121 and the flat pipe 122 of second do not interfere each other, and compact structure is regular, does benefit to the installation.

Preferably, the central axis X of the first header 111 is perpendicular to the flat 1211 of the first flat pipe 121, the second header 112 is perpendicular to the flat 1221 of the second flat pipe 122, and more paths of the first flat pipe 121 and the second flat pipe 122 can be maximally disposed along the central axis direction of the header assembly 110, so as to sufficiently improve the space utilization rate of the header assembly 110 in the length direction. Meanwhile, the central axis X of the first collecting pipe 111 is perpendicular to the flat 1211 of the first flat pipe 121, the second collecting pipe 112 is perpendicular to the flat 1221 of the second flat pipe 122, and the mounting holes of the first flat pipe 121 and the second flat pipe 122 on the collecting pipe assembly 110 can fully utilize the pipe wall material of the collecting pipe to realize the punching and flanging depth, so that the contact area between the collecting pipe and the flat pipe during welding is increased, and the compressive strength of a welding spot is improved. Meanwhile, it needs to be noted that the punching and welding process in the embodiment of the application is consistent with the existing mature scheme, complex operation processes are not needed, and the process is simple. The embodiment of the application improves the production feasibility and the reliability of the subcooler 100 on the basis of optimizing the integral structure of the subcooler 100.

In some embodiments, the first collecting pipe 111 and the second collecting pipe 112 are spaced along the length direction L of the first flat pipe 121. The distance between the first header 111 and the second header 112 is R-2r, and R is the maximum cross-sectional dimension of the first header 111 along the spacing direction of the first header 111 and the second header 112. The cross-sectional shapes of the first header 111 and the second header 112 may be both circular, and R is the diameter of the first header 111 or the diameter of the second header 112. In other embodiments, the cross-sectional shapes of the central axes of the first header 111 and the second header 112 may be set to other shapes, such as an oval shape, a square shape, a rectangular shape, or an irregular shape, and when the cross-sectional shapes of the first header 111 and the second header 112 are non-circular, R is the diameter of a circle circumscribed by the first header 111 or the second header 112.

Therefore, the first collecting pipe 111 and the second collecting pipe 112 are arranged at intervals along the length direction of the first flat pipe 121, and the distance between the first collecting pipe 111 and the second collecting pipe 112 is large, so that the first collecting pipe 111, the second collecting pipe 112 and the stack assembly 120 can be welded conveniently. In other embodiments, the first header 111 and the second header 112 are welded together along the length direction L of the first flat tube 121 to reduce the distance between the first header 111 and the second header 112, and thus reduce the volume of the subcooler 100.

In some embodiments, the first header 111 and the second header 112 may be nested, that is, one of the first header 111 and the second header 112 is sleeved outside the other of the first header 111 and the second header 112. The diameter of second pressure manifold 112 is less than the diameter of first pressure manifold 111, and first pressure manifold 111 overlaps the outside at second pressure manifold 112, and first flat pipe 121 runs through the lateral wall of first pressure manifold 111 to insert in first pressure manifold 111, and second flat pipe 122 runs through the lateral wall of first pressure manifold 111 and second pressure manifold 112, and inserts in second pressure manifold 112.

In some embodiments, the first header 111 and the second header 112 are formed by dividing the main header 110 by a cutoff plate 114. That is, the header assembly 110 includes a main header 113 and a flow divider 114, and the flow divider 114 is disposed within the main header 110 such that the main header 110 is provided as a first header 111 and a second header 112 separated by the flow divider 114. Specifically, the first flat tube 121 penetrates through a side wall of the main header 110 and is inserted into the first header 111, and the second flat tube 122 penetrates through the side wall of the main header 110 and the flow partition plate 114 and is inserted into the second header 112. Alternatively, the second flat tube 122 may extend through the sidewall of the main header 110 and be inserted into the second header 112, and the first flat tube 121 may extend through the sidewall of the main header 110 and the flow divider 114 and be inserted into the first header 111. In contrast to the header assembly 110 comprising two independent primary and secondary headers 111 and 112: the present embodiment can reduce the cost and volume of the header assembly 110 by having one header 110 perform the functions of both the first header 111 and the second header 112.

The end of the first flat pipe 121 is communicated with the first collecting pipe 111, and the end of the second flat pipe 122 penetrates through the first collecting pipe 111 and is communicated with the second collecting pipe 112. Therefore, the first collecting pipe 111 is communicated with the first flat pipe 121, and the second flat pipe 122 is communicated with the second collecting pipe 112. In addition, the second flat pipe 122 located between the first collecting pipe 111 and the second collecting pipe 112 does not exchange heat with the first flat pipe 121, and the length of the second microchannel located between the central axes of the first collecting pipe 111 and the second collecting pipe 112 can be reduced by setting the distance between the central axes of the first collecting pipe 111 and the second collecting pipe 112 to be smaller, so that the heat exchange area of the second microchannel can be increased.

In order to further improve heat exchange efficiency, the first flat tubes 121 and the second flat tubes 122 in the stack assembly 120 are alternately stacked, and the first flat tubes 121 and the second flat tubes 122 are fully contacted, so that the contacted heat exchange area is increased, and the heat exchange efficiency is improved. Because first flat pipe 121 and the flat pipe 122 of second range upon range of setting in turn, adjacent flat pipe is different way, and a set of stack subassembly 120 has two invalid heat transfer faces with the air contact, and under the certain circumstances of flat pipe quantity, first flat pipe 121 and the flat pipe 122 stack number of second are more, can reduce the stack number of flat pipe, and then improve the utilization ratio of heat transfer face.

In order to improve the welding strength between the stack assembly 120 and the header assembly 110, a plurality of stack assemblies 120 are provided, and the plurality of stack assemblies 120 are spaced apart from each other in the longitudinal direction of the header assembly 110. When the stack assembly 120 is welded to the collector assembly 110, the stack assembly 120 and the collector assembly 110 are assembled, and a welding material is filled in an assembly gap between the stack assembly 120 and the collector assembly 110, followed by welding. If the number of the flat pipes of the stacked assembly 120 is overlapped excessively, welding materials are more prone to leaking into installation gaps of the first flat pipes 121 and the second flat pipes 122, and therefore the stacked assembly 120 with a plurality of intervals is arranged along the length direction of the collecting pipe assembly 110, the number of the overlapped flat pipes of each stacked assembly 120 can be reduced, and the welding strength of the stacked assembly 120 and the collecting pipe assembly 110 is improved.

The number of the stack assemblies 120 arranged at intervals along the length direction of the collecting pipe assembly 110 and the number of the flat pipes of the stack assemblies 120 can be adjusted according to actual conditions.

Specifically, the number of flat tube stacks of the stack assembly 120 may be three, including two first flat tubes 121 and one second flat tube 122. Two first flat pipes 121 set up in the both sides of the flat pipe 122 of second, the tip of the flat pipe 121 of first both sides communicate in first pressure manifold 111, and the tip that is located the flat pipe 122 of middle second runs through first pressure manifold 111 and communicates in second pressure manifold 112. Alternatively, the number of flat tubes stacked in the stack assembly 120 may be four, five, or more, and the first flat tubes 121 and the second flat tubes 122 are alternately stacked.

In other embodiments, in order to improve the welding strength between the flat tubes of each stack assembly 120 and the header assembly 110, the ends of the first flat tube 121 and the second flat tube 122 connected in a stacked manner are separately provided. First flat pipe 121 and second flat pipe 122 are welded in first pressure manifold 111 and second pressure manifold 112 through independent mounting hole respectively, and welding area of contact is big, and intensity is higher.

Further, the central axis X of the first collecting pipe 111 is perpendicular to the flat surface 1212 at the end of the first flat pipe 121 and the second collecting pipe 112 is perpendicular to the flat surface 1222 at the end of the second flat pipe 122, so that the mounting holes formed in the collecting pipe assembly 110 have the same size, and are favorable for being formed. Do benefit to first flat pipe 121 and the flat pipe 122 of second and assemble in pressure manifold assembly 110 during the welding, simplify the technology degree of difficulty.

In an embodiment, the cross-sectional shapes of the first microchannel and the second microchannel perpendicular to the extending directions thereof may be rectangles, the side lengths of the first microchannel and the second microchannel are 0.5mm to 3mm, and the thicknesses between the first microchannel and the second microchannel and the surfaces of the corresponding first flat tube 121 and the corresponding second flat tube 122, between the adjacent first microchannel, and between the adjacent second microchannels are 0.2mm to 0.5mm, so that the first microchannel and the second microchannel meet the requirements of pressure resistance and heat transfer performance. In other embodiments, the cross-sectional shape of the first microchannel and the second microchannel can be other shapes, such as circular, triangular, trapezoidal, oval, or irregular shapes.

As can be seen from the above, the first collecting channel is connected to the first microchannel to provide the first refrigerant flow to the first microchannel through the first collecting channel and/or to collect the first refrigerant flow flowing through the first microchannel. In this embodiment, the number of the first collecting pipes 111 is two, and the two first collecting pipes 111 are respectively connected to two ends of the first microchannel, so as to provide a first refrigerant flow to the first microchannel by using one of the two first collecting pipes 111; and the other of the two first headers 111 is used to collect the first refrigerant flow passing through the first microchannels.

For example, in an air conditioning system, a first end of a first microchannel is connected to an outdoor heat exchanger through an expansion valve via one of two first headers 111 to provide a first refrigerant flow to the first microchannel in a cooling mode; the second end of the first microchannel is connected to the indoor heat exchanger through the other of the two first headers 111 to collect the first refrigerant flow flowing through the first microchannel. In the heating mode, since the flow direction of the first refrigerant flow in the first microchannel is opposite, the functions of the two first collecting pipes 111 are interchanged compared to the cooling mode.

As can be seen from the above, the second collecting channel is connected to the second microchannel to provide the second refrigerant flow to the second microchannel through the second collecting channel and/or to collect the second refrigerant flow flowing through the second microchannel. In this embodiment, the number of the second collecting pipes 112 is two, and the two second collecting pipes 112 are respectively connected to two ends of the second microchannel, so as to provide the second refrigerant flow to the second microchannel by using one of the two second collecting pipes 112; and the second refrigerant flow flowing through the second microchannels is collected by the other of the two second headers 112.

For example, in an air conditioning system, a first end of the second microchannel is connected to the expansion valve through one of the two second headers 112 to provide the second refrigerant flow to the second microchannel; the second end of the second microchannel is connected to the suction port of the compressor through the other of the two second headers 112 to collect the second refrigerant flow flowing through the second microchannel.

In some embodiments, a first refrigerant stream (i.e., a medium-pressure medium-temperature refrigerant stream) flows through the first microchannel, a second refrigerant stream (i.e., a low-pressure low-temperature refrigerant stream) flows through the second microchannel, the first refrigerant stream may be a liquid-phase refrigerant stream, and the second refrigerant stream may be a gas-liquid two-phase refrigerant stream. The second refrigerant stream absorbs heat from the first refrigerant stream of the first microchannel during flow along the second microchannel and is further vaporized to further subcool the first refrigerant stream.

It is noted that the first and second microchannels and the first and second refrigerant streams "first" and "second" are only used to distinguish the different microchannels and refrigerant streams and should not be considered as limiting the specific application of the microchannels and refrigerant streams. For example, in other embodiments or operation modes, the first refrigerant flow flowing through the first microchannel absorbs heat of the second refrigerant flow of the second microchannel, and the states of the first refrigerant flow and the second refrigerant flow are not limited to the liquid phase or the gas-liquid two-phase as defined above.

Furthermore, the flowing direction of the first refrigerant flow is opposite to that of the second refrigerant flow, so that a large temperature difference exists between the temperature of the first refrigerant flow and the temperature of the second refrigerant flow, and the heat exchange efficiency of the first refrigerant flow and the second refrigerant flow is improved. Alternatively, the flow direction of the first refrigerant flow may be the same as the flow direction of the second refrigerant flow.

Referring to fig. 5 to 7, fig. 5 is a schematic view of an overall structure of a subcooler according to another embodiment of the present application; FIG. 6 is an enlarged view of portion B of FIG. 5; fig. 7 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application.

Yet another embodiment of the present application provides a subcooler 100 comprising a header assembly 110 and a stack assembly 120, the header assembly 110 comprising a first header 111 and a second header 112, the first header 111 and the second header 112 being arranged side-by-side along a first direction a-a. Stack assembly 120 includes at least one first flat tube 121 and at least one second flat tube 122 that are arranged in a stack. The first flat pipe 121 is communicated with the first collecting pipe 111, and the second flat pipe 122 is communicated with the second collecting pipe 112. Specifically, a plurality of first microchannels (not shown in the figure) are formed in the first flat tube 121, a first refrigerant flow flows through the first microchannels, a plurality of second microchannels (not shown in the figure) are formed in the second flat tube 122, and a second refrigerant flow flows through the second microchannels. A first heat exchange channel is formed in the first header 111, and the first header channel is configured to provide a first refrigerant flow to the plurality of first microchannels and/or collect the first refrigerant flow flowing through the plurality of first microchannels. A second heat exchange channel is formed in the second header 112, and the second header channel is configured to provide a second refrigerant flow to the second microchannels and/or collect the second refrigerant flow flowing through the second microchannels. The first refrigerant flow flowing through the first microchannels is subjected to heat exchange with the second refrigerant flow flowing through the second microchannels.

The first direction a-a intersects with the length direction L of the first flat pipe 121, which is beneficial for the first flat pipe 121 and the second flat pipe 122 to be respectively communicated with the corresponding first collecting pipe 111 and the second collecting pipe 112, and the communication can be realized without penetrating through another collecting pipe, so that a plurality of holes are prevented from being formed on the same horizontal plane of the same collecting pipe, the welding effect of the collecting pipe assembly 110 and the stacking assembly 120 is improved, and the welding strength and the pressure-resistant reliability are improved; meanwhile, the assembly difficulty can be reduced, and the assembly efficiency is improved. Moreover, the connection mode of the collecting pipe and the flat pipe avoids the flat pipe from directly penetrating through the collecting pipe, is beneficial to reducing the pressure loss in the collecting pipe, and improves the heat exchange efficiency.

Specifically, an included angle at an intersection of the first direction a-a and the length direction L of the first flat tube 121 may be 0 ° to 180 °, for example, 30 °, 60 °, 90 °, 120 °, or 150 °, which is not limited herein; of course, the angle of intersection is generally between 80 ° and 90 °, so that each of the first flat tube 121 and the second flat tube 122 may be connected to the corresponding first header 111 and the second header 112, respectively.

Preferably, the first direction a-a is perpendicular to the length direction L of the first flat tube 121, so that the assembly difficulty is further reduced, and the assembly efficiency is improved. Alternatively, the first direction a-a is perpendicular to the length direction of the second flat tube 122.

In some embodiments, the first header 111 and the second header 112 are spaced side-by-side. The distance between the first header 111 and the second header 112 is R-2r, and R is the maximum cross-sectional dimension of the first header 111 along the spacing direction of the first header 111 and the second header 112. The cross-sectional shapes of the first header 111 and the second header 112 may be both circular, and R is the diameter of the first header 111 or the diameter of the second header 112. In other embodiments, the cross-sectional shapes of the first header 111 and the second header 112 may be configured to be other shapes, such as an oval shape, a square shape, a rectangular shape, or an irregular shape, and when the cross-sectional shapes of the first header 111 and the second header 112 are non-circular, R is the diameter of a circle circumscribed by the first header 111 or the second header 112.

Therefore, the first header 111 and the second header 112 are arranged side by side at an interval, and the distance between the first header 111 and the second header 112 is set to be larger, so that the first header 111, the second header 112, and the stack 120 can be welded conveniently. In other embodiments, the first header 111 and the second header 112 are welded together along a length direction L perpendicular to the first flat tube 121 to reduce a distance between the first header 111 and the second header 112, thereby reducing a volume of the subcooler 100.

In some embodiments, the first header 111 and the second header 112 are formed by dividing the main header 110 by a cutoff plate 114. That is, the header assembly 110 includes a main header 113 and a flow divider 114, and the flow divider 114 is disposed within the main header 110 such that the main header 110 is provided as a first header 111 and a second header 112 separated by the flow divider 114. Specifically, the first flat tube 121 penetrates through a side wall of the total header 110 and is inserted into the first header 111, and the second flat tube 122 penetrates through the side wall of the total header 110 and is inserted into the second header 112. In contrast to the header assembly 110 of fig. 1, which includes two independent primary headers 111 and secondary headers 112: the present embodiment can reduce the cost and volume of the header assembly 110 by having one header 110 perform the functions of both the first header 111 and the second header 112.

In an embodiment, a central axis of at least one of the first header 111 and the second header 112 is parallel to a flat surface of at least one of the first flat tube 121 and the second flat tube 122, specifically, the central axis X of the first header 111 is parallel to the flat surface 1211 of the first flat tube 121, and/or a central axis X' of the second header 112 is parallel to the flat surface 1221 of the second flat tube 122. In order to facilitate connection of the first flat pipe 121 and the second flat pipe 122 with the corresponding first collecting pipe 111 and the second collecting pipe 112, the stacking assembly 120 includes a first flat pipe 121 and a second flat pipe 122 stacked to be connected with the corresponding first collecting pipe 111 and the corresponding second collecting pipe 112 respectively.

In order to improve the heat exchange efficiency of the subcooler 100, a plurality of stacks 120 are provided, and the plurality of stacks 120 are spaced apart from each other along the central axis of the header assembly 110. By providing a plurality of the stacking assemblies 120 at intervals in the longitudinal direction of the header assembly 110, the number of the stacking assemblies 120 can be increased, and the heat exchange efficiency can be improved.

Preferably, the central axes of the first header 111 and the second header 112 in the header assembly 110 are parallel to each other, and the flat surfaces of the first flat tube 121 and the second flat tube 122 in the stack assembly 120 are parallel to each other.

In an embodiment, an end of the first flat tube 121 is communicated with the first collecting pipe 111, and an end of the second flat tube 122 is communicated with the second collecting pipe 112, so that the first collecting pipe 111 is communicated with the first flat tube 121, and the second flat tube 122 is communicated with the second collecting pipe 112.

In order to avoid another pressure manifold for first flat pipe 121 and the flat pipe 122 of second, and communicate corresponding first pressure manifold 111 and second pressure manifold 112, the first flat pipe 121 that stacks up the setting and the tip of the flat pipe 122 of second separate on first direction a-a set up to buckle to the pressure manifold direction that corresponds respectively. Simultaneously, the tip separation setting of first flat pipe 121 and the flat pipe 122 of second more does benefit to the intercommunication and sets up first pressure manifold 111 and second pressure manifold 112 side by side the interval.

In some embodiments, the direction of extension of the end of the first flat tube 121 and the direction of extension of the end of the second flat tube 122 face away from each other. So that the first flat tube 121 and the second flat tube 122 are respectively connected to the corresponding first collecting pipe 111 and the second collecting pipe 112.

Specifically, the length direction L of the first flat tube 121 is perpendicular to the first direction a-a and passes through a midpoint between connecting lines of the first collecting tube 111 and the second collecting tube 112, so that middle sections of the first flat tube 121 and the second flat tube 122 are attached to each other, and end portions of the first flat tube 121 and the second flat tube 122 are bent towards directions deviating from each other and connected with the corresponding collecting tubes, thereby realizing the function of the subcooler 100.

Further, the central axis X of the first collecting pipe 111 is parallel to the flat surface 1212 at the end of the first flat pipe 121; the central axis X' of the second header 112 is parallel to the flat surfaces 1222 at the ends of the second flat tubes 122, so that the mounting holes formed in the header assembly 110 have the same size, which is beneficial to forming. Do benefit to first flat pipe 121 and the flat pipe 122 of second and assemble in pressure manifold assembly 110 during the welding, simplify the technology degree of difficulty.

In an embodiment, the cross-sectional shapes of the first microchannel and the second microchannel perpendicular to the extending directions thereof may be rectangles, the side lengths of the first microchannel and the second microchannel are 0.5mm to 3mm, and the thicknesses between the first microchannel and the second microchannel and the surfaces of the corresponding first flat tube 121 and the corresponding second flat tube 122, between the adjacent first microchannel, and between the adjacent second microchannels are 0.2mm to 0.5mm, so that the first microchannel and the second microchannel meet the requirements of pressure resistance and heat transfer performance. In other embodiments, the cross-sectional shape of the first microchannel and the second microchannel may be other shapes, such as circular, triangular, trapezoidal, elliptical, or irregular shapes.

For example, in an air conditioning system, a first end of a first microchannel is connected to an outdoor heat exchanger through an expansion valve via one of two first headers 111 to provide a first refrigerant flow to the first microchannel in a cooling mode; the second end of the first microchannel is connected to the indoor heat exchanger through the other of the two first collecting pipes 111 to collect the first refrigerant flow flowing through the first microchannel. In the heating mode, since the flow direction of the first refrigerant flow in the first microchannel is opposite, the functions of the two first collecting pipes 111 are interchanged compared to the cooling mode.

For example, in an air conditioning system, the first end of the second microchannel is connected to the expansion valve through one of the two second collecting pipes 112 to provide the second refrigerant flow to the second microchannel; the second end of the second microchannel is connected to the suction port of the compressor through the other of the two second headers 112 to collect the second refrigerant flow flowing through the second microchannel.

Referring to fig. 8 to 11, fig. 8 is a schematic view of an overall structure of a subcooler according to another embodiment of the present application; fig. 9 is an enlarged view of portion C of fig. 8; FIG. 10 is a schematic cross-sectional view of yet another embodiment of a subcooler of the present application; fig. 11 is a schematic structural view of a header assembly of yet another embodiment of a subcooler of the present application.

Yet another embodiment of the present application provides a subcooler 100 comprising a header assembly 110 and a stack 120, the header assembly 110 comprising a first header 111 and a second header 112. Stack assembly 120 includes at least one first flat tube 121 and at least one second flat tube 122 that are arranged in a stack. The first flat pipe 121 is communicated with the first collecting pipe 111, and the second flat pipe 122 is communicated with the second collecting pipe 112. Specifically, a plurality of first microchannels are formed in the first flat tube 121, a first refrigerant flow flows through the first microchannels, a plurality of second microchannels are formed in the second flat tube 122, and a second refrigerant flow flows through the second microchannels. A first heat exchange channel is formed in the first header 111, and the first header channel is configured to provide a first refrigerant flow to the plurality of first microchannels and/or collect the first refrigerant flow flowing through the plurality of first microchannels. A second heat exchange channel is formed in the second header 112, and the second header channel is configured to provide a second refrigerant flow to the second microchannels and/or collect the second refrigerant flow flowing through the second microchannels. The first refrigerant flow flowing through the first microchannels is subjected to heat exchange with the second refrigerant flow flowing through the second microchannels.

The first collecting pipe 111 and the second collecting pipe 112 are arranged side by side along a first direction a-a, the first direction a-a intersects with the length direction L of the first flat pipe 121, and a central axis of at least one of the first collecting pipe 111 and the second collecting pipe 112 intersects with a flat surface of at least one of the first flat pipe 121 and the second flat pipe 122. Due to the thickness of the first flat tube 121 and the second flat tube 122, the width of the flat surface 1221 of the first flat tube 121 and the second flat tube 122 is greatly smaller. Through setting the central axis of at least one of the first collecting pipe 111 and the second collecting pipe 112 and the flat surface of at least one of the first flat pipe 121 and the second flat pipe 122 to intersect, on the basis that the pipe diameter of the collecting pipe assembly 110 is not increased, more paths of the first flat pipe 121 and the second flat pipe 122 can be arranged on the collecting pipe assembly 110 with the same length, and further the heat exchange efficiency of the subcooler 100 is improved. Moreover, the first direction a-a intersects with the length direction L of the first flat pipe 121, which is beneficial for the first flat pipe 121 and the second flat pipe 122 to be respectively communicated with the corresponding first collecting pipe 111 and the second collecting pipe 112, and the communication can be realized without penetrating through another collecting pipe, so that a plurality of holes are prevented from being formed on the same horizontal plane of the same collecting pipe, the welding effect of the collecting pipe assembly 110 and the laminated assembly 120 is improved, and the welding strength and the pressure resistance reliability are improved; meanwhile, the assembly difficulty can be reduced, and the assembly efficiency is improved. Moreover, the connection mode of the collecting pipe and the flat pipe avoids the flat pipe from directly penetrating through the collecting pipe, is beneficial to reducing the pressure loss in the collecting pipe, and further improves the heat exchange efficiency.

The central axis of at least one of the first header 111 and the second header 112 intersects with the flat surface of at least one of the first flat tube 121 and the second flat tube 122. The method specifically comprises the following steps: the flat 1211 of the first flat tube 121 intersects the central axis X of the first header 111, and/or the flat 1221 of the second flat tube 122 intersects the central axis X' of the second header 111. That is, the central axis X of the first header 111 is not parallel to the flat 1211 of the first flat tube 121, and/or the central axis X' of the second header 112 is not parallel to the flat 1221 of the second flat tube 122.

Specifically, the central axis of at least one of the first header 111 and the second header 112 intersects with the flat surface of at least one of the first flat tube 121 and the second flat tube 122, and an included angle at the intersection may be 30 °, 60 °, 90 °, 120 °, or 150 °, which is not limited herein; of course, the angle of intersection is typically between 80 ° and 90 ° to facilitate the provision of more than one first flat tube 121 and second flat tube 122. The flat surface 1211 of the first flat tube 121 is intersected with the central axis X of the first collecting tube 111, and the length of the first flat tube 121 in the central axis X direction of the first collecting tube 111 is shorter than the length of the flat surface 1211 of the first flat tube 121 when the flat surface 1211 is parallel to the central axis X of the first collecting tube 111. The flat surfaces 1221 of the second flat tubes 122 are intersected with the central axis X 'of the second collecting pipe 111, and the length of the second flat tubes 122 in the central axis X' direction of the second collecting pipe 112 is shorter than the length of the flat surfaces 1221 of the second flat tubes 122 when the flat surfaces are parallel to the second collecting pipe 112. Therefore, the collecting pipe assembly 110 with the same length can arrange more paths of the first flat pipe 121 and the second flat pipe 122, and further improve the heat exchange efficiency of the subcooler 100.

Preferably, the central axis X of the first header 111 is perpendicular to the flat 1211 of the first flat tube 121, and the second header 112 is perpendicular to the flat 1221 of the second flat tube 122, so that more paths of the first flat tube 121 and the second flat tube 122 can be arranged along the central axis of the header assembly 110, and the space utilization rate of the header assembly 110 in the length direction thereof is substantially improved. Meanwhile, the central axis X of the first collecting pipe 111 is perpendicular to the flat 1211 of the first flat pipe 121, the central axis X' of the second collecting pipe 112 is perpendicular to the flat 1221 of the second flat pipe 122, and the mounting holes of the first flat pipe 121 and the second flat pipe 122 on the collecting pipe assembly 110 can fully utilize the pipe wall material of the collecting pipe to realize the depth of punching and flanging, so that the contact area between the collecting pipe and the flat pipe during welding is increased, and the compressive strength of a welding spot is improved. Meanwhile, it needs to be noted that the punching and welding process in the embodiment of the application is consistent with the existing mature scheme, complex operation processes are not needed, and the process is simple. The embodiment of the application improves the production feasibility and the reliability of the subcooler 100 on the basis of optimizing the integral structure of the subcooler 100.

Further, the central axes of the first header 111 and the second header 112 are parallel to each other to extend in the same direction. The first collecting pipe 111 and the second collecting pipe 112 do not interfere with each other, and the structure is compact and regular, thereby being beneficial to installation.

Further, the flat surfaces 1221 of the first flat pipes 121 and the second flat pipes 122 are parallel to each other, so that the contact area between the first flat pipes 121 and the second flat pipes 122 in the stacked arrangement is larger, the first flat pipes 121 and the second flat pipes 122 do not interfere with each other, the structure is compact and regular, and the installation is facilitated.

In some embodiments, the first header 111 and the second header 112 are spaced apart. The distance between the first header 111 and the second header 112 is R-2r, and R is the maximum cross-sectional dimension of the first header 111 along the spacing direction of the first header 111 and the second header 112. The cross-sectional shapes of the first header 111 and the second header 112 may be both circular, and R is the diameter of the first header 111 or the diameter of the second header 112. In other embodiments, the cross-sectional shapes of the first header 111 and the second header 112 may be configured to be other shapes, such as an oval shape, a square shape, a rectangular shape, or an irregular shape, and when the cross-sectional shapes of the first header 111 and the second header 112 are non-circular, R is the diameter of a circle circumscribed by the first header 111 or the second header 112.

Therefore, the first header 111 and the second header 112 are spaced apart from each other, and the distance between the first header 111 and the second header 112 is set to be larger, so that the first header 111, the second header 112, and the stack 120 can be welded together conveniently. In other embodiments, the first header 111 and the second header 112 are welded together to reduce the distance between the first header 111 and the second header 112, and thus the volume of the subcooler 100.

In some embodiments, the first header 111 and the second header 112 are formed by dividing the header 110 by a flow divider 114. That is, the header assembly 110 includes a main header 113 and a flow divider 114, and the flow divider 114 is disposed within the main header 110 such that the main header 110 is provided as a first header 111 and a second header 112 separated by the flow divider 114. Specifically, the first flat tube 121 penetrates through a sidewall of the main header 110 and is inserted into the first header 111, and the second flat tube 122 penetrates through a sidewall of the main header 110 and is inserted into the second header 112. In contrast to the header assembly 110 of fig. 1, which includes two independent primary headers 111 and secondary headers 112: the present embodiment can reduce the cost and volume of the header assembly 110 by having one header 110 perform the functions of both the first header 111 and the second header 112.

Specifically, the end of the first flat pipe 121 is communicated with the first collecting pipe 111, and the end of the second flat pipe 122 is communicated with the second collecting pipe 112, so that the first collecting pipe 111 is communicated with the first flat pipe 121, and the second flat pipe 122 is communicated with the second collecting pipe 112.

In order to facilitate the first flat pipe 121 and the second flat pipe 122 to avoid another collecting pipe and communicate the corresponding first collecting pipe 111 and the second collecting pipe 112, the end portions of the first flat pipe 121 and the second flat pipe 122 which are stacked are separately arranged in the first direction a-a so as to be bent towards the corresponding collecting pipe direction respectively. Simultaneously, the tip separation setting of first flat pipe 121 and the flat pipe 122 of second more does benefit to the intercommunication and sets up first pressure manifold 111 and second pressure manifold 112 side by side the interval.

Further, the central axis X of the first header 111 is perpendicular to the flat 1212 at the end of the first flat tube 121, and the second header 112 is perpendicular to the flat 1222 at the end of the second flat tube 122. Therefore, the mounting holes formed in the header assembly 110 have the same specification, and are easy to form. Do benefit to first flat pipe 121 and the flat pipe 122 of second and assemble in pressure manifold assembly 110 during the welding, simplify the technology degree of difficulty.

In order to further improve heat exchange efficiency, the first flat tubes 121 and the second flat tubes 122 in the stack assembly 120 are alternately stacked, and the first flat tubes 121 and the second flat tubes 122 are fully contacted, so that the contacted heat exchange area is increased, and the heat exchange efficiency is improved. Because first flat pipe 121 and the flat pipe 122 of second range upon range of setting in turn, adjacent flat pipe is different ways, and a set of stack subassembly has two invalid heat-transfer faces with the air contact, and under the certain circumstances of flat pipe quantity, first flat pipe 121 and the flat pipe 122 of second number of stack are more, can reduce the stack number of flat pipe, and then improve the utilization ratio of heat-transfer face.

Because this application embodiment, range upon range of and set up first flat pipe 121 and second flat pipe 122 and all can communicate respectively to corresponding first pressure manifold 111 and second pressure manifold 112, need not to run through another pressure manifold and can realize the intercommunication, so every flat pipe all can communicate the pressure manifold that corresponds through independent single mounting hole, range upon range of subassembly 120 and pressure manifold subassembly 110's welding strength is high, and the first flat pipe 121 and the flat pipe 122 number of adding of second in every range upon range of subassembly 120 can set up more.

Of course, there may be more than one stack 120, and multiple stacks 120 may be spaced along the length of the manifold assembly 110. Thereby avoiding the need to continuously form a plurality of mounting holes along the length of the manifold assembly 110 and further improving the welding strength between the stack 120 and the manifold assembly 110.

Further heat exchange can be realized between the adjacent stacked assemblies 120 through structures such as fins, the heat exchange surface is fully utilized, and the heat exchange efficiency is improved.

In an embodiment, the cross-sectional shapes of the first microchannel and the second microchannel perpendicular to the extending direction thereof may be rectangles, the side lengths of the first microchannel and the second microchannel are 0.5mm to 3mm, and the thicknesses between the first microchannel and the second microchannel and the surfaces of the corresponding first flat tube 121 and the second flat tube 122, between the adjacent first microchannel and between the adjacent second microchannel are 0.2mm to 0.5mm, so that the first microchannel and the second microchannel meet the requirements of pressure resistance and heat transfer performance. In other embodiments, the cross-sectional shape of the first microchannel and the second microchannel may be other shapes, such as circular, triangular, trapezoidal, elliptical, or irregular shapes.

The terms "first", "second" and "third" in the present application are used for descriptive purposes only and are not to be construed as indicating the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the embodiment of the present application, all the directional indicators (such as upper, lower, left, right, front, and rear … …) are used only to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. A process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to the listed steps or elements but may alternatively include additional steps or elements not listed or inherent to such process, method, article, or apparatus.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. A subcooler, characterized in that said subcooler comprises:

the collecting pipe assembly comprises a first collecting pipe and a second collecting pipe, and the first collecting pipe and the second collecting pipe are arranged side by side along a first direction;

the laminated assembly comprises at least one first flat pipe and at least one second flat pipe which are arranged in a laminated mode; the first flat pipe is communicated with the first collecting pipe, and the second flat pipe is communicated with the second collecting pipe;

the first direction intersects with the length direction of the first flat pipe, and the central axis of at least one of the first collecting pipe and the second collecting pipe intersects with the flat surface of at least one of the first flat pipe and the second flat pipe.

2. The subcooler of claim 1, wherein said first header and said second header are spaced side-by-side.

3. The subcooler according to claim 1, wherein the end of the first flat tube is communicated with the first collecting pipe; the end part of the second flat pipe is communicated with the second collecting pipe.

4. The subcooler of claim 1, wherein an end of said first flat tube and an end of said second flat tube are separated in said first direction.

5. The subcooler according to claim 1, characterized in that the direction of extension of the end of the first flat tube and the direction of extension of the end of the second flat tube deviate from each other.

6. The subcooler of claim 3, wherein the central axis of the first header is perpendicular to a flat face at an end of the first flat tube; and the central axis of the second collecting pipe is perpendicular to the flat surface at the end part of the second flat pipe.

7. The subcooler of claim 1, wherein said first flat tubes and said second flat tubes in said stack are alternately stacked.

8. The subcooler of claim 1, wherein said stack is provided in plurality, and wherein said stack is spaced along a central axis of said header assembly.

9. The heat exchanger of claim 1, wherein said manifold assembly includes a main manifold and a flow divider disposed within said main manifold such that said main manifold is disposed as said first manifold and said second manifold separated by said flow divider.

10. The heat exchanger of claim 9, wherein said main header is provided as said first header and said second header separated by said cutoff, said first flat tube extending through a sidewall of said main header and inserted into said first header, said second flat tube extending through a sidewall of said main header and inserted into said second header.

11. The subcooler according to claim 1, wherein the number of the first collecting pipes is two, and the two first collecting pipes are respectively connected to two ends of the first flat pipe; the number of the second collecting pipes is two, and the two second collecting pipes are respectively connected to two ends of the second plate body.

12. The subcooler according to any one of claims 1-11, wherein the first header is configured to provide a first refrigerant flow to the first flat tube and/or collect the first refrigerant flow flowing through the first flat tube, and the second header is configured to provide a second refrigerant flow to the second flat tube and/or collect the second refrigerant flow flowing through the second flat tube, so that heat exchange is performed between the first refrigerant flow flowing through the first flat tube and the second refrigerant flow flowing through the second flat tube.

13. The subcooler according to any of claims 1-11, wherein the first flat tube comprises a plurality of first microchannels, wherein the second flat tube comprises a plurality of second microchannels, wherein a second refrigerant stream flowing through the second microchannels absorbs heat from the first refrigerant stream flowing through the first microchannels to subcool the first refrigerant stream; or a first refrigerant stream flowing through the first microchannel absorbs heat from the second refrigerant stream flowing through the second microchannel to subcool the second refrigerant stream.

14. The subcooler of claim 13, wherein the extending direction of the first microchannel and the extending direction of the second microchannel are parallel to each other.