Heat exchanger for cross-flow fan

Abstract

The utility model discloses a heat exchanger for a cross-flow fan. The heat exchanger aims to overcome the defect that a heat exchanger used in an existing cross-flow fan is not arranged according to the characteristics of the cross-flow fan. The heat exchanger comprises a first collecting pipe, a second collecting pipe, flat pipes and fins arranged between the adjacent flat pipes, wherein the first flow collecting pipe and the second flow collecting pipe are arranged at the two ends of the cross-flow fan in the length direction, the first flow collecting pipe and the second flow collecting pipe are in an arc shape, and the length direction of the flat pipe is arranged in the direction of an air channel formed by the cross-flow fan and the shell. The heat dissipating capacity is fully utilized through the arrangement form of the flat pipes, the thickness of the flat pipes and the dense arrangement of the fins, and the heat exchange efficiency of the heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange, and more specifically, it relates to a heat exchanger for a cross-flow fan. Background Art

[0002] Microchannel heat exchangers are gradually being applied to the commercial and household refrigeration and air-conditioning industries due to their high heat transfer performance, compact structure, and cost advantages.

[0003] Cross-flow fans are commonly used in the air-conditioning industry. Due to the significant local differences in the air flow pattern of cross-flow fans, the heat dissipation of the microchannel heat exchanger designed according to the conventional method will vary at different positions, resulting in different cooling amplitudes of the coolant.

[0004] There is an urgent need for a heat exchanger that can adapt to cross-flow fans, which can adapt to the air flow strength at various positions in the air duct, so that the cooling amplitudes of the coolant passing through each flat tube are the same, thereby improving the overall heat transfer efficiency. Summary of the Invention

[0005] The utility model overcomes the deficiency that the heat exchanger used in the existing cross-flow fan is not set according to the characteristics of the cross-flow fan, and provides a heat exchanger for a cross-flow fan, which can adapt to the air flow strength at various positions in the air duct, so that the cooling amplitudes of the coolant passing through each flat tube are the same, thereby improving the overall heat transfer efficiency.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A heat exchanger for a cross-flow fan, which is installed on the housing of the cross-flow fan, and includes:

[0008] A first header;

[0009] A second header;

[0010] Flat tubes, the two ends of the flat tubes are respectively connected to the first header and the second header to communicate the first header and the second header; and

[0011] Fins arranged between adjacent flat tubes;

[0012] Wherein, the first header and the second header are arranged at both ends in the length direction of the cross-flow fan, the first header and the second header are arc-shaped, and the length direction of the flat tubes is arranged along the air duct formed by the cross-flow fan and the housing.

[0013] The arc-shaped first header and second header adapt to the air duct formed by the cross-flow fan and the housing. In some embodiments, the first header and the second header protrude outward relative to the cross-flow fan, so that the cross-sectional area of the heat exchanger corresponding to the place with the maximum wind force is the largest. Thereby improving the heat transfer efficiency at this place.

[0014] Meanwhile, the method of bending the first and second header pipes can avoid bending the flat pipes and fins with more complex structures, thereby simplifying the complexity of the device and the production design cost.

[0015] Preferably, the fin density between the flat pipes at the high air flow velocity in the air duct is higher than that between the flat pipes at the low air flow velocity in the air duct. By providing more fins in the strong wind area, since the heat dissipation capacity is stronger there, more fins can better exert the heat dissipation capacity.

[0016] Preferably, the fins are arranged in a wavy pattern between adjacent flat pipes, and the periodic density of the fins between the flat pipes at the high air flow velocity in the air duct is higher. The structure improves the fin density by making the periodic density of the waves higher at the high air flow velocity.

[0017] Preferably, the fins are arranged in a wavy pattern between adjacent flat pipes, and there are main fins and auxiliary fins between the flat pipes at the high air flow velocity in the air duct, and the main fins and the auxiliary fins are arranged alternately. The structure improves the fin density by arranging the main fins and the auxiliary fins.

[0018] Preferably, the flat pipes at the high air flow velocity in the air duct are arranged more densely than the flat pipes at the low air flow velocity in the air duct. The structure improves the fin density at that place by setting the density of the flat pipes, thereby providing the heat dissipation capacity.

[0019] Preferably, the flat pipe has a plurality of micro-channels that are open at both ends and arranged along the cross-sectional length direction, and the cross-section of the flat pipe at the high air flow velocity in the air duct is wider than the cross-section of the flat pipe at the low air flow in the air duct. In the above way, more fins can be carried, thereby improving the heat dissipation capacity.

[0020] Preferably, the flat pipe at the high air flow velocity in the air duct has a greater number of micro-channels than the flat pipe at the low air flow velocity in the air duct. By arranging a wider flat pipe, the amount of cooling medium passing through the flat pipe at the high air flow velocity is more, thereby obtaining better heat dissipation capacity.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] By including setting the arrangement form of the flat pipes, the thickness of each flat pipe, and the dense arrangement of the fins, the heat dissipation amount is fully utilized, and the heat exchange efficiency of the heat exchanger is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the present utility model;

[0024] Figure 2 is a schematic diagram of the heat exchanger of the present utility model (missing fins);

[0025] Figure 3 is the front view (default fins) of the present utility model;

[0026] Figure 4 is of the present utility model Figure 3 sectional view taken along line A-A;

[0027] Figure 5 is a schematic diagram of the fin arrangement under an embodiment of the present utility model;

[0028] Figure 6 is a schematic diagram of the fin arrangement under another embodiment of the present utility model.

[0029] In the figure:

[0030] the first header 1, the second header 2, the flat tube 3, the cross-flow fan 4, the housing 5, the fins 6, the main fins 7, the secondary fins 8, the microchannel 9. Detailed implementation manners

[0031] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0033] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only relational terms determined for the convenience of describing the structural relationship of each component or element of the present disclosure and do not specifically refer to any component or element in the present disclosure and should not be construed as a limitation of the present disclosure.

[0035] In the present disclosure, terms such as "fixedly connected", "connected", "connected to" should be understood in a broad sense and may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For those skilled in the relevant scientific research or technology in this field, the specific meaning of the above terms in the present disclosure can be determined according to specific circumstances and should not be construed as a limitation of the present disclosure.

[0036] Embodiment:

[0037] Refer to Figure 1 As shown, the lines therein represent air flow, where the dense area represents the area with strong wind force and the sparse area represents the area with weak wind force. The heat exchanger is installed at Figure 1 the marked position in the figure, and this view is a view from a top-down perspective.

[0038] Refer to Figure 2 As shown, a heat exchanger for a cross-flow fan 4 is installed on the housing 5 of the cross-flow fan 4 and includes:

[0039] The first header pipe 1;

[0040] The second header pipe 2;

[0041] Flat tubes 3, both ends of the flat tubes 3 are respectively connected to the first header pipe 1 and the second header pipe 2 to communicate the first header pipe 1 and the second header pipe 2; and

[0042] Fins 6 arranged between adjacent flat tubes 3;

[0043] Wherein, the first header pipe 1 and the second header pipe 2 are arranged at both ends in the length direction of the cross-flow fan, the first header pipe 1 and the second header pipe 2 are arc-shaped, and the length direction of the flat tubes 3 is arranged along the air duct direction formed by the cross-flow fan 4 and the housing 5.

[0044] The housing 5 has an air outlet and one or more air inlets. The setting of this application is applicable to the case of the air outlet or a single air inlet. This application takes the air inlet as an example.

[0045] Refer to Figure 1 As shown, when the cross-flow fan 4 is working, a vortex eccentric to the cross-flow fan 4 will be generated. The wind force is greater and the air flow velocity is faster closer to the vortex.

[0046] Therefore, the length direction of the flat tubes 3 of this application is arranged along the air duct direction, which can reduce the projected area relative to the air flow direction, thereby reducing the wind resistance.

[0047] Refer to Figure 5 、 6 , in some embodiments, the density of the fins 6 between the flat tubes 3 at the high air flow velocity in the air duct is higher than the density of the fins 6 between the flat tubes 3 at the low air flow velocity in the air duct. By providing more fins 6 at the place with strong wind force, since the heat dissipation capacity is stronger at this place, more fins 6 can better exert the heat dissipation capacity.

[0048] Among them, one implementation of the above solution is that the fins 6 are arranged in a wavy pattern between adjacent flat tubes 3, and the periodic density of the fins 6 between the flat tubes 3 at the location with a higher air flow velocity in the air duct is higher. The structure improves the density of the fins 6 by making the periodic density of the waves higher at the high-speed air flow location.

[0049] Another implementation: between the flat tubes 3 at the location with a higher air flow velocity in the air duct, there are main fins 7 and auxiliary fins 8, and the main fins 7 and the auxiliary fins 8 are arranged alternately. The structure improves the density of the fins 6 by arranging the main fins 7 and the auxiliary fins 8.

[0050] In another embodiment, the flat tubes 3 at the location with a higher air flow velocity in the air duct are arranged more densely than the flat tubes 3 at the location with a lower air flow velocity in the air duct. The structure improves the density of the fins 6 at this location by setting the density of the flat tubes 3, thereby providing heat dissipation capacity.

[0051] See Figure 2 、 3 In still another embodiment, the flat tube 3 has a plurality of micro-channels 9 that are open at both ends and are arranged along the cross-sectional length direction, and the cross-section of the flat tube 3 at the location with a higher air flow velocity in the air duct is wider than the cross-section of the flat tube 3 at the location with a lower air flow velocity in the air duct. In the above manner, more fins 6 can be carried, thereby improving the heat dissipation capacity.

[0052] The implementation of the above embodiment includes that the flat tube 3 at the location with a higher air flow velocity in the air duct has a larger number of micro-channels 9 than the flat tube 3 at the location with a lower air flow velocity in the air duct. By arranging a wider flat tube 3, the amount of cooling medium passing through the flat tube 3 at the location with a higher air flow velocity is more, thereby obtaining better heat dissipation capacity.

[0053] There is also such an embodiment that, on the premise that the position with stronger wind force has denser flat tubes 3 or wider flat tubes 3, there are more fins 6 at this position.

[0054] The arc-shaped first header 1 and second header 2 adapt to the air duct formed by the cross-flow fan and the housing. In some embodiments, the first header 1 and the second header 2 protrude outward relative to the cross-flow fan, so that the heat exchanger area corresponding to the cross-section at the location with the maximum wind force is the largest. Thereby improving the heat transfer efficiency at this location.

[0055] At the same time, by bending the first header 1 and the second header 2, it is possible to avoid bending the more complex flat tubes 3 and fins 6, thereby simplifying the complexity of the device and the production design cost.

[0056] The above-described embodiments are only preferred solutions of the present invention, and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A heat exchanger for a crossflow fan, mounted on a housing of the crossflow fan, characterized in that: include: The first header; The second header; A flat tube, two ends of which are respectively connected to the first current collecting tube and the second current collecting tube to communicate with the first current collecting tube and the second current collecting tube; and Fins arranged between adjacent flat tubes; The first collecting pipe and the second collecting pipe are arranged at both ends of the length direction of the crossflow fan, the first collecting pipe and the second collecting pipe are arc-shaped, and the length direction of the flat tube is arranged along the air duct direction formed by the crossflow fan and the shell.

2. A heat exchanger for a crossflow fan according to claim 1, characterized in that: The fin density between the flat tubes at a location where the air flow velocity in the air duct is high is higher than the fin density between the flat tubes at a location where the air flow velocity in the air duct is low.

3. A heat exchanger for a crossflow fan according to claim 2, characterized in that: The fins are arranged in a wave shape between adjacent flat tubes, and the period density of the fins between the flat tubes at a location where the air flow velocity in the air duct is high is higher.

4. A heat exchanger for a crossflow fan according to claim 2, characterized in that: The fins are arranged in a wave shape between adjacent flat tubes. The flat tubes at the locations where the air flow velocity is high in the air duct are provided with main fins and auxiliary fins, and the main fins and auxiliary fins are arranged in a staggered manner.

5. The heat exchanger for a crossflow fan according to claim 1, characterized in that: The flat tubes at the location of high air velocity in the air duct are arranged more densely than the flat tubes at the location of low air velocity in the air duct.

6. A heat exchanger for a crossflow fan according to claim 1, characterized in that: The flat tube has a plurality of microchannels with both ends open and arranged along the length direction of the cross section. The cross section of the flat tube at a location where the airflow velocity of the air duct is high is wider than the cross section of the flat tube at a location where the airflow velocity of the air duct is low.

7. A heat exchanger for a crossflow fan according to claim 6, characterized in that: The flat tubes at the locations where the air flow velocity in the air duct is high have a greater number of microchannels than the flat tubes at the locations where the air flow velocity in the air duct is low.

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