Micro-channel heat exchanger capable of changing heat exchange effect

Abstract

The utility model discloses a micro-channel heat exchanger with a changeable heat exchange effect. The micro-channel heat exchanger comprises a plurality of micro-channel flat pipes. All the micro-channel flat tubes are arranged in parallel up and down, one ends of half of the micro-channel flat tubes are communicated with the first liquid collecting tube, the other ends of the half of the micro-channel flat tubes are communicated with the second liquid collecting tube, one ends of the other half of the micro-channel flat tubes are communicated with the third liquid collecting tube, and the other ends of the half of the micro-channel flat tubes are communicated with the fourth liquid collecting tube; the micro-channel heat exchanger is composed of a first liquid collecting pipe, a second liquid collecting pipe, a third liquid collecting pipe, a fourth liquid collecting pipe and a plurality of micro-channel flat pipes, and is provided with a first outlet pipe, a first inlet pipe, a second outlet pipe and a second inlet pipe, so that the micro-channel heat exchanger can be used as a heat exchange component for two refrigerating systems, and can also be used as a heat exchange component for a single refrigerating system according to the requirement of the single refrigerating system. The first outlet pipe and the first inlet pipe are connected to control the circulation amount, and the first outlet pipe, the second outlet pipe, the first inlet pipe and the second inlet pipe can also be connected at the same time to improve the circulation amount of refrigerants and meet the use requirements of different refrigerating systems.

Description

Technical field:

[0001] The utility model relates to the technical field of heat exchanger-related equipment, and more particularly to a microchannel heat exchanger capable of converting thermal effects. Background technology:

[0002] The existing refrigeration system includes a compressor, a condenser, a throttling device and an evaporator.

[0003] Existing conventional evaporators or condensers generally use coils made of bent copper tubes. This type of evaporator has a huge demand for copper materials, is very expensive, and has high recycling costs.

[0004] Therefore, existing evaporators and condensers are using microchannel all-aluminum heat exchangers as a new type of heat exchanger. Its compact structure increases the contact area between the refrigerant and the channel wall due to the microchannel structure, ensuring uniform flow. Compared with traditional fin-tube heat exchangers, microchannel heat exchangers can improve performance by approximately 20% on average, and reduce the unit refrigerant charge by approximately 20%. The heat exchanger is made entirely of a single material, aluminum, through brazing, which avoids potential corrosion and is easy to recycle, thus ensuring long-term and efficient use of the heat exchanger.

[0005] However, the existing microchannel heat exchanger is generally composed of two manifolds and a plurality of flat tubes between the two manifolds. The refrigerant flow rate is fixed, and the microchannel heat exchanger can only be installed in one refrigeration system. Utility model content:

[0006] The purpose of the present utility model is to overcome the shortcomings of the prior art and provide a microchannel heat exchanger with a convertible heating effect. The microchannel heat exchanger comprises four tube bodies, namely a first collecting tube, a second collecting tube, a third collecting tube and a fourth collecting tube, and a plurality of microchannel flat tubes. The microchannel heat exchanger has a first outlet pipe, a first inlet pipe, a second outlet pipe and a second inlet pipe, so that the microchannel heat exchanger can be used as a heat exchange component for two refrigeration systems. The first outlet pipe and the first inlet pipe can be connected to control the flow rate according to the needs of a single refrigeration system. The first outlet pipe, the second outlet pipe and the first inlet pipe and the second inlet pipe can also be connected at the same time to increase the flow rate of the refrigerant and meet the use needs of different refrigeration systems.

[0007] The solution of the utility model to solve the technical problem is:

[0008] A microchannel heat exchanger with variable heat effect comprises a plurality of microchannel flat tubes; all the microchannel flat tubes are arranged in parallel vertically, one end of half of the microchannel flat tubes is connected to a first liquid collecting pipe and the other end is connected to a second liquid collecting pipe, and one end of the other half of the microchannel flat tubes is connected to a third liquid collecting pipe and the other end is connected to a fourth liquid collecting pipe;

[0009] A heat sink is provided between each two adjacent microchannel flat tubes;

[0010] The upper side wall of the first collecting pipe is connected to the first inlet pipe, the lower side wall of the third collecting pipe is connected to the second inlet pipe, the lower side wall of the first collecting pipe is connected to the first outlet pipe, and the lower side wall of the third collecting pipe is connected to the second outlet pipe;

[0011] A first partition is fixed at the upper middle portion of the first manifold, a second partition is fixed at the upper middle portion of the first manifold, the first partition and the second partition divide the first manifold into a first upper cavity, a first middle cavity and a first lower cavity, and a third partition is fixed at the lower middle portion of the second manifold, the third partition divides the second manifold into a second upper cavity and a second lower cavity;

[0012] A fourth partition is fixed at the upper part of the middle of the third collecting pipe, a fifth partition is fixed at the upper part of the middle of the third collecting pipe, the fourth partition and the fifth partition separate the third collecting pipe into a third upper cavity, a third middle cavity and a third lower cavity, a sixth partition is fixed at the lower part of the middle of the fourth collecting pipe, the sixth partition separates the fourth collecting pipe into a fourth upper cavity and a fourth lower cavity.

[0013] All microchannel flat tubes are composed of a plurality of first flat tubes and a plurality of second flat tubes, wherein the width of the first flat tubes is greater than the width of the second flat tubes, and the length of the second flat tubes is greater than the length of the first flat tubes, and all the first flat tubes and the second flat tubes are separated.

[0014] One end of all the first flat tubes is connected to the first liquid collecting pipe, and the other end of all the first flat tubes is connected to the second liquid collecting pipe;

[0015] One end of all the second flat tubes is connected to the third liquid collecting pipe, and the other end of all the second flat tubes is connected to the fourth liquid collecting pipe;

[0016] The first inlet pipe is in communication with the first upper cavity, the first upper cavity is in communication with the second upper cavity through the corresponding first flat tube, the second upper cavity is in communication with the first middle cavity through the corresponding first flat tube, the first middle cavity is in communication with the second lower cavity through the corresponding first flat tube, the second lower cavity is in communication with the first lower cavity through the corresponding first flat tube, and the first outlet pipe is in communication with the first lower cavity;

[0017] The second inlet pipe is in communication with the third upper cavity, the third upper cavity is in communication with the fourth upper cavity via the corresponding second flat tube, the fourth upper cavity is in communication with the third middle cavity via the corresponding second flat tube, the third middle cavity is in communication with the fourth lower cavity via the corresponding second flat tube, the fourth lower cavity is in communication with the third lower cavity via the corresponding second flat tube, and the second outlet pipe is in communication with the third lower cavity;

[0018] A heat sink is sandwiched between the first flat tube and the second flat tube adjacent to each other in the vertical direction.

[0019] The first and third collecting pipes are located on the left side of the microchannel flat tube, and the second and fourth collecting pipes are located on the right side of the microchannel flat tube. Both ends of all second flat tubes pass through the corresponding first and second collecting pipes and extend into the corresponding third and fourth collecting pipes to achieve communication.

[0020] The portions of all the second flat tubes located in the first and second liquid collecting pipes are welded and fixed to the first and second liquid collecting pipes.

[0021] The outstanding effects of the utility model are:

[0022] Compared with the existing technology, it is composed of four tube bodies including a first collecting pipe, a second collecting pipe, a third collecting pipe and a fourth collecting pipe and a plurality of microchannel flat tubes. It has a first outlet pipe, a first inlet pipe, a second outlet pipe and a second inlet pipe, so that it can be used as a heat exchange component for two refrigeration systems. It can also connect the first outlet pipe and the first inlet pipe or the second outlet pipe and the second inlet pipe to control the flow rate according to the needs of a single refrigeration system. It can also connect the first outlet pipe, the second outlet pipe and the first inlet pipe, the second inlet pipe at the same time to increase the flow rate of the refrigerant to meet the use needs of different refrigeration systems. Description of the drawings:

[0023] Figure 1 It is a partial structural diagram of the utility model;

[0024] Figure 2 It is a partial cross-sectional view of the utility model;

[0025] Figure 3 is a partial cross-sectional view of the first flat tube;

[0026] Figure 4 It is a partial cross-sectional view of the second flat tube. Specific implementation method:

[0027] For example, see Figures 1 to 4 As shown, a microchannel heat exchanger with variable heat effect includes a plurality of microchannel flat tubes 10; all microchannel flat tubes 10 are arranged in parallel vertically, with one end of half of the microchannel flat tubes 10 connected to a first liquid header 1 and the other end connected to a second liquid header 2, and one end of the other half of the microchannel flat tubes 10 connected to a third liquid header 3 and the other end connected to a fourth liquid header 4;

[0028] A heat sink 20 is provided between each two adjacent microchannel flat tubes 10;

[0029] Furthermore, all microchannel flat tubes 10 are composed of multiple first flat tubes 101 and multiple second flat tubes 102. The width of the first flat tube 101 is greater than the width of the second flat tube 102, and the length of the second flat tube 102 is longer than the length of the first flat tube 101. All first flat tubes 101 and second flat tubes 102 are separated and arranged in an upper and lower manner; a heat sink 20 is sandwiched between the upper and lower adjacent first flat tubes 101 and second flat tubes 102, and the top and bottom surfaces of the heat sink 20 are welded and fixed to the wall surfaces of the corresponding first flat tube 101 and second flat tube 102. The heat sink 20 is a wavy bent sheet.

[0030] One end of all first flat tubes 101 is connected to the first liquid collecting pipe 1, and the other end of all first flat tubes 101 is connected to the second liquid collecting pipe 2;

[0031] One end of all the second flat tubes 102 is connected to the third liquid collecting pipe 3, and the other end of all the second flat tubes 102 is connected to the fourth liquid collecting pipe 4;

[0032] The first collecting pipe 1 and the third collecting pipe 3 are arranged vertically side by side on the left side of the microchannel flat tube 10, and the second collecting pipe 2 and the fourth collecting pipe 4 are arranged vertically side by side on the right side of the microchannel flat tube 10. The two ends of all the second flat tubes 102 pass through the corresponding first collecting pipe 1 and the second collecting pipe 2 respectively and extend into the corresponding third collecting pipe 3 and the fourth collecting pipe 4 to achieve communication.

[0033] Furthermore, the portions of all the second flat tubes 102 located in the first manifold 1 and the second manifold 2 are welded and fixed to the first manifold 1 and the second manifold 2 .

[0034] The upper side wall of the first liquid collecting pipe 1 is connected to the first inlet pipe 11, the lower side wall of the third liquid collecting pipe 3 is connected to the second inlet pipe 31, the lower side wall of the first liquid collecting pipe 1 is connected to the first outlet pipe 12, and the lower side wall of the third liquid collecting pipe 3 is connected to the second outlet pipe 32;

[0035] A first partition plate 13 is welded and fixed to the upper portion of the middle portion of the first manifold 1. A second partition plate 14 is welded and fixed to the upper portion of the middle portion of the first manifold 1. The first partition plate 13 and the second partition plate 14 separate the first manifold 1 into a first upper cavity 100, a first middle cavity 200, and a first lower cavity 300, which are not interconnected. A third partition plate 21 is welded and fixed to the lower portion of the middle portion of the second manifold 2. The third partition plate 21 separates the second manifold 2 into a second upper cavity 22 and a second lower cavity 23, which are not interconnected.

[0036] A fourth partition plate 33 is welded and fixed at the upper part of the middle of the third collecting pipe 3, and a fifth partition plate 34 is welded and fixed at the upper part of the middle of the third collecting pipe 3. The fourth partition plate 33 and the fifth partition plate 34 separate the third collecting pipe 3 into a third upper cavity 400, a third middle cavity 500 and a third lower cavity 600 that are not connected to each other. A sixth partition plate 41 is welded and fixed at the lower part of the middle of the fourth collecting pipe 4. The sixth partition plate 41 separates the fourth collecting pipe 4 into a fourth upper cavity 42 and a fourth lower cavity 43 that are not connected to each other.

[0037] Furthermore, the first inlet pipe 11 is connected to the first upper cavity 100, the first upper cavity 100 is connected to the second upper cavity 22 through the corresponding first flat tube 101, the second upper cavity 22 is connected to the first middle cavity 200 through the corresponding first flat tube 101, the first middle cavity 200 is connected to the second lower cavity 23 through the corresponding first flat tube 101, the second lower cavity 23 is connected to the first lower cavity 300 through the corresponding first flat tube 101, and the first outlet pipe 12 is connected to the first lower cavity 300. This structure shows that after the refrigerant enters from the first inlet pipe 11, it enters the first upper cavity 100, passes through the corresponding first flat tube 101 to reach the second upper cavity 22, then enters the first middle cavity 200 through the corresponding first flat tube 101, then enters the first lower cavity 300 through the corresponding first flat tube 101, and then flows out from the first outlet pipe 12.

[0038] The second inlet pipe 31 communicates with the third upper chamber 400. The third upper chamber 400 communicates with the fourth upper chamber 42 via the corresponding second flat tubes 102. The fourth upper chamber 42 communicates with the third middle chamber 500 via the corresponding second flat tubes 102. The third middle chamber 500 communicates with the fourth lower chamber 43 via the corresponding second flat tubes 102. The fourth lower chamber 43 communicates with the third lower chamber 600 via the corresponding second flat tubes 102. The second outlet pipe 32 communicates with the third lower chamber 600. This structure illustrates that refrigerant enters through the second inlet pipe 31, enters the third upper chamber 400, passes through the corresponding second flat tubes 102 to reach the fourth upper chamber 42, then passes through the corresponding second flat tubes 102 to enter the third middle chamber 500, then passes through the corresponding second flat tubes 102 to enter the fourth lower chamber 43, then passes through the corresponding second flat tubes 102 to enter the third lower chamber 600, and finally flows out through the second outlet pipe 32.

[0039] When this embodiment is in use, when it is used as a condenser for two refrigeration systems, its first inlet pipe 11 and the second inlet pipe 31 are respectively connected to the discharge ports of the compressors of the two refrigeration systems through connecting pipes, and the first outlet pipe 12 and the second outlet pipe 32 are respectively connected to the capillaries or the inlets of the expansion valves of the two refrigeration systems through connecting pipes. It can be used as a condenser for two refrigeration systems, and it can also exchange heat between the refrigerants of the two refrigerators through the first flat tube 101 and the second flat tube 102.

[0040] When used as a condenser of a refrigeration system, when it only needs a partial refrigerant circulation, it only needs to connect the first inlet pipe 11 and the first outlet pipe 12 to the system separately, or connect the second inlet pipe 31 and the second outlet pipe 32 to the system separately; when it is necessary to ensure the full refrigerant circulation, it is necessary to connect the first inlet pipe 11 and the second inlet pipe 31 to the system through a tee, and connect the first outlet pipe 12 and the second inlet pipe 31 to the system through a tee.

[0041] Therefore, this embodiment can also be used as two circulation specifications, that is, when the circulation volume only needs to reach a part of the specification, it is only necessary to connect the first inlet pipe 11 and the first outlet pipe 12 to the system alone, or to connect the second inlet pipe 31 and the second outlet pipe 32 to the system alone. When it is necessary to ensure the full circulation volume, it is necessary to connect the first inlet pipe 11 and the second inlet pipe 31 to the system through a tee, and connect the first outlet pipe 12 and the second inlet pipe 31 to the system through a tee. When it is used as an accessory, it improves versatility and is suitable for three circulation specifications (the first type is suitable for connecting the first inlet pipe 11 and the first outlet pipe 12. This specification uses the first flat tube 101, whose flow cross-section is larger than the second flat tube 102. The second type is suitable for connecting the second inlet pipe 31 and the second outlet pipe 32. The third type is fully connected to the system).

[0042] This embodiment can be used not only as a condenser, but also as an evaporator. It is only necessary to connect the first inlet pipe 11 or the second inlet pipe 31 to the outlet of the capillary tube or expansion valve of the corresponding refrigeration system through a connecting pipe, and the first outlet pipe 12 or the second outlet pipe 32 to the feed port of the compressor of the refrigeration system through a connecting pipe. The specific usage principle is the same as that of the condenser, which will not be repeated here.

[0043] Furthermore, an upper connecting plate is fixed to the top surface of the topmost microchannel flat tube 10, and a heat sink 20 is provided between the upper connecting plate and the top surface of the topmost microchannel flat tube 10. A lower connecting plate is fixed to the bottom surface of the bottommost microchannel flat tube 10, and a heat sink 20 is provided between the top surface of the lower connecting plate and the bottom surface of the bottommost microchannel flat tube 10.

[0044] Furthermore, the first collecting pipe 1, the second collecting pipe 2, the third collecting pipe 3 and the fourth collecting pipe 4 are all vertical cylindrical bodies.

[0045] The above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the scope of patent protection of the present invention shall be defined by the claims.

Claims

1. A microchannel heat exchanger capable of changing the heat effect, comprising a plurality of microchannel flat tubes (10); Features: All the microchannel flat tubes (10) are arranged in parallel vertically, one end of half of the microchannel flat tubes (10) is connected to the first liquid collecting tube (1) and the other end is connected to the second liquid collecting tube (2), and one end of the other half of the microchannel flat tubes (10) is connected to the third liquid collecting tube (3) and the other end is connected to the fourth liquid collecting tube (4); A heat sink (20) is provided between each two upper and lower adjacent microchannel flat tubes (10); The first liquid collecting pipe (1) and the third liquid collecting pipe (3) are located on the same side, and the second liquid collecting pipe (2) and the fourth liquid collecting pipe (4) are located on the same side; The upper side wall of the first liquid collecting pipe (1) is connected to a first inlet pipe (11), the lower side wall of the third liquid collecting pipe (3) is connected to a second inlet pipe (31), the lower side wall of the first liquid collecting pipe (1) is connected to a first outlet pipe (12), and the lower side wall of the third liquid collecting pipe (3) is connected to a second outlet pipe (32); A first partition (13) is fixed at the upper part of the middle of the first collecting pipe (1), a second partition (14) is fixed at the upper part of the middle of the first collecting pipe (1), the first partition (13) and the second partition (14) divide the first collecting pipe (1) into a first upper cavity (100), a first middle cavity (200) and a first lower cavity (300), and a third partition (21) is fixed at the lower part of the middle of the second collecting pipe (2), the third partition (21) divides the second collecting pipe (2) into a second upper cavity (22) and a second lower cavity (23); A fourth partition (33) is fixed at the upper middle part of the third collecting pipe (3), a fifth partition (34) is fixed at the upper middle part of the third collecting pipe (3), the fourth partition (33) and the fifth partition (34) divide the third collecting pipe (3) into a third upper cavity (400), a third middle cavity (500) and a third lower cavity (600), and a sixth partition (41) is fixed at the lower middle part of the fourth collecting pipe (4), the sixth partition (41) divides the fourth collecting pipe (4) into a fourth upper cavity (42) and a fourth lower cavity (43).

2. A microchannel heat exchanger with variable thermal effect according to claim 1, Features: All microchannel flat tubes (10) are composed of a plurality of first flat tubes (101) and a plurality of second flat tubes (102); the width of the first flat tubes (101) is greater than the width of the second flat tubes (102); the length of the second flat tubes (102) is greater than the length of the first flat tubes (101); and all first flat tubes (101) and second flat tubes (102) are arranged separately; One end of all the first flat tubes (101) is connected to the first liquid collecting pipe (1), and the other end of all the first flat tubes (101) is connected to the second liquid collecting pipe (2); One end of all the second flat tubes (102) is connected to the third liquid collecting pipe (3), and the other end of all the second flat tubes (102) is connected to the fourth liquid collecting pipe (4); The first inlet pipe (11) is in communication with the first upper cavity (100); the first upper cavity (100) is in communication with the second upper cavity (22) through the corresponding first flat tube (101); the second upper cavity (22) is in communication with the first middle cavity (200) through the corresponding first flat tube (101); the first middle cavity (200) is in communication with the second lower cavity (23) through the corresponding first flat tube (101); the second lower cavity (23) is in communication with the first lower cavity (300) through the corresponding first flat tube (101); and the first outlet pipe (12) is in communication with the first lower cavity (300); The second inlet pipe (31) is in communication with the third upper cavity (400), the third upper cavity (400) is in communication with the fourth upper cavity (42) through the corresponding second flat tube (102), the fourth upper cavity (42) is in communication with the third middle cavity (500) through the corresponding second flat tube (102), the third middle cavity (500) is in communication with the fourth lower cavity (43) through the corresponding second flat tube (102), the fourth lower cavity (43) is in communication with the third lower cavity (600) through the corresponding second flat tube (102), and the second outlet pipe (32) is in communication with the third lower cavity (600); A heat sink (20) is sandwiched between the first flat tube (101) and the second flat tube (102) which are adjacent to each other vertically.

3. A microchannel heat exchanger with variable thermal effect according to claim 1, Features: The first liquid collecting pipe (1) and the third liquid collecting pipe (3) are located on the left side of the microchannel flat tube (10), and the second liquid collecting pipe (2) and the fourth liquid collecting pipe (4) are located on the right side of the microchannel flat tube (10), and both ends of all the second flat tubes (102) respectively pass through the corresponding first liquid collecting pipe (1) and the second liquid collecting pipe (2) and extend into the corresponding third liquid collecting pipe (3) and the fourth liquid collecting pipe (4) to achieve communication.

4. A microchannel heat exchanger with variable thermal effect according to claim 3, Features: The parts of all the second flat tubes (102) located in the first collecting tube (1) and the second collecting tube (2) are welded and fixed to the first collecting tube (1) and the second collecting tube (2).

5. A microchannel heat exchanger with variable thermal effect according to claim 1, Features: The first liquid collecting pipe (1) and the third liquid collecting pipe (3) are arranged vertically side by side on the left and right, and the second liquid collecting pipe (2) and the fourth liquid collecting pipe (4) are arranged vertically side by side on the left and right.

6. A microchannel heat exchanger with variable thermal effect according to claim 1, Features: An upper connecting plate is fixed to the top surface of the topmost microchannel flat tube (10), and a heat sink (20) is provided between the upper connecting plate and the top surface of the topmost microchannel flat tube (10); a lower connecting plate is fixed to the bottom surface of the bottommost microchannel flat tube (10), and a heat sink (20) is provided between the top surface of the lower connecting plate and the bottom surface of the bottommost microchannel flat tube (10).

7. A microchannel heat exchanger with variable thermal effect according to claim 1, Features: The first liquid collecting pipe (1), the second liquid collecting pipe (2), the third liquid collecting pipe (3) and the fourth liquid collecting pipe (4) are all vertical cylindrical bodies.

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