Flat tube heat exchanger and air conditioner

Abstract

The utility model provides a flat tube heat exchanger and an air conditioner, and relates to the technical field of air conditioners. The flat tube heat exchanger comprises a plurality of heat exchange fins and flat tubes. The multiple heat exchange fins are sequentially arranged at intervals, and mounting grooves are formed in all the heat exchange fins. Heat exchange runners are arranged in the flat pipes, and the flat pipes are installed in the installation grooves so as to exchange heat with all the heat exchange fins. A flow guide part is arranged on the outer side of the flat pipe and used for guiding condensate water so as to prevent the condensate water from flowing in the length direction of the flat pipe. The problem that condensate water leaks out of a water pan due to the fact that the condensate water flows in the length direction of a flat pipe can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange equipment technical field, specifically, it relates to a flat tube heat exchanger and air conditioner. BACKGROUND

[0002] Flat tube heat exchanger because it adopts flat tube to carry out heat exchange and increase the contact area of heat transfer surface and the flow channel inside flat tube can still promote the turbulent flow of fluid etc. make flat tube heat exchanger have higher heat transfer efficiency, in the field of heating ventilation air conditioning is widely used.

[0003] However, in air conditioner, condensate water on the surface of flat tube will flow along the length direction of flat tube due to surface tension, and flow to the outside of water receiving tray, resulting in air conditioner water leakage. In the prior art, to solve the problem of water leakage, the water receiving tray is generally made larger. However, increasing the water receiving tray will result in the increase of the volume and cost of the air conditioner. SUMMARY

[0004] The problem solved by the utility model is how to improve the water leakage problem caused by the condensate water flowing along the length direction of the flat tube without increasing the volume of the air conditioner.

[0005] To solve the above problems, the utility model provides a flat tube heat exchanger and air conditioner, which can improve the problem that the condensate water leaks out of the water receiving tray due to the condensate water flowing along the length direction of the flat tube.

[0006] In the first aspect, the utility model provides a flat tube heat exchanger, which comprises a plurality of heat exchange fins and a flat tube.

[0007] The plurality of heat exchange fins are arranged in sequence and at intervals, and all the heat exchange fins are provided with mounting grooves.

[0008] The flat tube is provided with a heat exchange flow channel, and the flat tube is mounted in the mounting groove to exchange heat with all the heat exchange fins.

[0009] The outer side of the flat tube is provided with a flow guide part, and the flow guide part is used for guiding the condensate water to block the condensate water flowing along the length direction of the flat tube.

[0010] In the present application, the flow guide part is arranged on the outer side of the flat tube of the flat tube heat exchanger of the heat exchanger, so as to block the condensate water flowing along the length direction of the flat tube. The flow guide part is used to promote the downward flow of the condensate water, shorten the aggregation and residence time of the condensate water between the fins, so as to avoid the condensate water path between the condensate water and the water receiving tray, thereby improving the problem that the condensate water leaks out of the water receiving tray along the length direction of the outer side of the flat tube.

[0011] In the optional embodiment, the flow guide part is arranged on one side or both sides of the width of the flat tube.

[0012] The two sides of the width direction of the flat tube are easy to form a condensate water path between the side wall corresponding to the water pan, and the condensate water leaks out of the water pan. The flow guide part is arranged on one side or both sides of the width direction of the flat tube, so that the water is guided downward by the flow guide part, thereby avoiding the condensate water from forming a condensate water path by lapping with the side wall of the water pan, and the distance between the side wall of the water pan and the end of the flat tube is reduced, thereby reducing the thickness size of the air conditioner.

[0013] In an optional embodiment, a plurality of flow guide parts are arranged on the outer periphery of the flat tube at intervals along the length direction.

[0014] The plurality of flow guide parts are arranged, and the flow guide is better achieved.

[0015] In an optional embodiment, the flow guide part is a groove arranged on the outer periphery of the flat tube.

[0016] The flow guide part is arranged as a groove, and the gap between the flat tube and the side wall of the water pan is increased at the position of the groove. When the condensate water lapping with the side wall of the water pan along one end of the length direction of the flat tube forms a condensate water path, and flows to the groove along the length direction, the condensate water will fall into the water pan from the groove due to the increased gap at the groove.

[0017] In an optional embodiment, the setting direction of the groove is perpendicular to the length direction of the flat tube.

[0018] The setting direction of the groove is perpendicular to the length direction of the flat tube, so that the condensate water flows downward after flowing to the recess.

[0019] In an optional embodiment, the cross section of the groove is one of a circular arc, a triangle, and a quadrilateral.

[0020] The groove is arranged in one of the above structures, and the condensate water flows downward more easily.

[0021] In an optional embodiment, at least one groove is arranged on the outer periphery of each flat tube, and the groove is arranged at a position corresponding to the gap between two adjacent heat exchange fins of the flat tube or at a position corresponding to the heat exchange fin of the flat tube.

[0022] The position of the groove corresponds to the fin or the gap between the fins, so that the condensate water flows downward more easily.

[0023] In an optional embodiment, the installation slot is arranged along the width direction of the heat exchange fin, and the installation slot penetrates one side of the heat exchange fin in the width direction, and the flat tube is installed in the installation slot by penetrating one side of the heat exchange fin.

[0024] The flat tube is provided with the flow guide part at least corresponding to the side of the installation slot penetrating the heat exchange fin.

[0025] In the present application, one end of the installation slot penetrates the fin, which facilitates the installation of the flat tube. Since the fin is penetrated, one end of the flat tube in the length direction is not shielded, so that the condensed water is more likely to flow in the length direction. The flow guide part is arranged on this side, so that the leakage of the condensed water can be avoided.

[0026] In an optional embodiment, the heat exchange fin comprises a first segment, a second segment and a third segment connected by bending;

[0027] The first segment, the second segment and the third segment are all provided with a plurality of installation slots;

[0028] The second segment is bent inward at the corresponding installation slot relative to the first segment, and the third segment is bent inward at the corresponding installation slot relative to the second segment.

[0029] Some of the installation slots penetrate the heat exchange fin corresponding to one side of the outer side of the flat tube heat exchanger.

[0030] In the present application, the flat tube heat exchanger is provided with three segments connected by bending, which facilitates the arrangement of a larger area of the flat tube heat exchanger in the air conditioner, thereby being more conducive to heat exchange. In addition, the outer side of the installation slot penetrates the fin, which facilitates the bending of the flat tube heat exchanger.

[0031] In a second aspect, the utility model provides a kind of air conditioner, and the air conditioner includes indoor unit body and the flat tube heat exchanger of any one of preceding embodiment;

[0032] The flat tube heat exchanger is installed in the indoor unit body, and the indoor unit body is provided with a water pan, and the water pan corresponds to the end of the flat tube heat exchanger.

[0033] In the present application, the flow guide part is arranged on the outer side of the flat tube, so that the condensed water can be guided downward by the flow guide part, thereby avoiding the condensed water from being lapped between the flat tube and the side wall of the water pan to form a condensed water path, and improving the problem of indoor unit leakage. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is the schematic view of the thickness direction cross section of air conditioner indoor unit provided by the utility model embodiment;

[0035] Figure 2 A structure schematic view of the flat tube heat exchanger provided by the embodiment of the present application is provided.

[0036] Figure 3 A partial schematic view of the flat tube heat exchanger provided by the embodiment of the present application is provided.

[0037] Figure 4 A structure schematic view of the flat tube heat exchanger provided by the embodiment of the present application is provided.

[0038] Figure 5 An assembly schematic view of the flat tube heat exchanger and the water pan provided by the embodiment of the present application is provided.

[0039] Icon: 100-flat tube heat exchanger; 110-heat exchange fin; 111-mounting groove; 113-first section; 115-second section; 117-third section; 130-flat tube; 131-heat exchange flow channel; 133-flow guide part; 135-groove; 300-air conditioner; 310-indoor unit; 311-indoor unit body; 313-water pan; 315-cross-flow fan wheel; 316-front side plate; 317-rear side plate. DETAILED DESCRIPTION

[0040] In order to make the above object, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0041] Please refer to Figures 1 to 5 The embodiment provides an air conditioner 300, and the indoor unit 310 of the air conditioner 300 comprises an indoor unit body 311 and a flat tube heat exchanger 100. The flat tube heat exchanger 100 is installed in the indoor unit body 311, and the indoor unit body 311 is provided with a water pan 313 corresponding to the bottom end of the flat tube heat exchanger 100. The condensed water on the flat tube heat exchanger 100 can fall into the water pan 313.

[0042] Further, the indoor unit body 311 is provided with a front water pan 313 and a rear water pan 313, and the front water pan 313 and the rear water pan 313 are arranged in the thickness direction of the indoor unit body 311. The indoor unit body 311 is further provided with a cross-flow fan wheel 315. The flat tube heat exchanger 100 is arranged in a semi-enclosed manner on the outer side of the cross-flow fan wheel 315. The bottom end of the front side of the flat tube heat exchanger 100 extends into the front water pan 313, and the bottom end of the rear side of the flat tube heat exchanger 100 extends into the rear water pan 313.

[0043] The front and rear water pans 313 each include a bottom plate, a front side plate 316 and a rear side plate 317 arranged on both sides of the bottom plate in the front-rear direction, and a left side plate and a right side plate arranged on both sides of the bottom plate in the left-right direction. The bottom plate, the front side plate 316, the rear side plate 317, the left side plate, and the right side plate collectively enclose a chamber for containing condensed water.

[0044] The existing copper tube heat exchanger has a circular arc-shaped outer cross section and a shape with a long distance from the front side plate 316 and the rear side plate 317. The condensed water on the outside of the copper tube generally flows directly downward and does not flow along the length direction of the copper tube, nor does it form a condensed water path between the front side plate 316 and the copper tube or between the rear side plate 317 and the copper tube, causing the condensed water to leak out of the water pan 313. When the flat tube heat exchanger 100 is used, the distance between the two ends of the flat tube 130 and the front side plate 316 and the rear side plate 317 is short due to the large volume of the flat tube 130, and the hydrophobicity of the surface of the water pan 313 will change to hydrophilicity as the air conditioner 300 is used for a long time. Thus, under the action of the surface tension of the condensed water, the top end of the water pan 313 (the top end of the front side plate 316 and the rear side plate 317) will form a condensed water path with the end of the flat tube 130, causing the top of the front side plate 316 and the top of the rear side plate 317 of the water pan 313 to leak water outward. In one treatment method, the distance between the front side plate 316 and the rear side plate 317 is increased, i.e., the gap between the front side plate 316 and the rear side plate 317 and the two ends of the flat tube 130 in the width direction is increased, to improve the problem of condensed water leakage. However, this method will cause the size of the indoor unit 310 in the thickness direction to increase.

[0045] In the present embodiment, the flat tube heat exchanger 100 includes a plurality of heat exchange fins 110 and a flat tube 130. The plurality of heat exchange fins 110 are arranged in sequence and spaced apart, and all the heat exchange fins 110 are provided with mounting grooves 111. The flat tube 130 is provided with a heat exchange flow channel 131 inside, and the flat tube 130 is mounted in the mounting grooves 111 to exchange heat with all the heat exchange fins 110. The outside of the flat tube 130 is provided with a flow guide portion 133 for guiding the condensed water to block the condensed water from flowing along the length direction of the flat tube 130.

[0046] Please refer to Figures 1 to 5 , the present embodiment sets a flow guide portion 133 on the outside of the flat tube 130 of the heat exchanger of the flat tube 130 to block the condensed water from flowing along the length direction of the flat tube 130, and uses the flow guide portion 133 to promote the downward flow of the condensed water, shortens the aggregation and residence time of the condensed water between the fins, so that the condensed water path between the condensed water and the water pan 313 can be avoided, thereby improving the problem of the condensed water flowing along the length direction of the outside of the flat tube 130 and leaking out of the outside of the water pan 313.

[0047] It should be noted that when the flat tube heat exchanger 100 is installed in the indoor unit 310, the length direction of the flat tube 130 of the flat tube heat exchanger 100 is parallel to the length direction of the indoor unit body 311. The flat tube 130 is provided with a plurality of heat exchange flow channels 131. The portion of the outer periphery of the flat tube 130 abutting against the mounting groove 111 is generally connected by brazing.

[0048] In the present embodiment, the flow guide portion 133 is arranged on both sides of the width of the flat tube 130.

[0049] Since the two sides of the width direction of the flat tube 130 are easy to form a condensate water path between the side wall corresponding to the water pan 313, the condensate water leaks out of the water pan 313. The present embodiment arranges the flow guide portion 133 on one side or both sides of the width of the flat tube 130, so that the water is guided downward by the flow guide portion 133, thereby avoiding the condensate water from forming a condensate water path by lapping with the side wall of the water pan 313 (i.e. the top end of the front side plate 316 and the top end of the rear side plate 317), and such arrangement can reduce the distance between the side wall of the water pan 313 and the end of the flat tube 130, thereby reducing the thickness direction size of the air conditioner 300.

[0050] Of course, in some other embodiments of the present application, the flow guide portion 133 can also be arranged on one side of the width direction of the flat tube 130, or the flow guide portion 133 is arranged in a circle along the outer periphery of the flat tube 130.

[0051] In the present embodiment, the outer periphery of the flat tube 130 is provided with a plurality of flow guide portions 133 arranged at intervals along the length direction. The present embodiment arranges a plurality of flow guide portions 133, which can better achieve flow guide.

[0052] In the present embodiment, the flow guide portion 133 is a groove 135 arranged on the outer periphery of the flat tube 130.

[0053] Please refer to Figures 1 to 5 In the present embodiment, the flow guide portion 133 is arranged as a groove 135, which increases the gap between the flat tube 130 and the side wall of the water pan 313 (the front side plate 316 and the rear side plate 317) at the position of the groove 135. When the condensate water lapping with the side wall of the water pan 313 along one end of the length direction of the flat tube 130 forms a condensate water path and flows along the length direction to the groove 135, the condensate water will fall into the water pan 313 from the groove 135 due to the increased gap at the groove 135. Secondly, the groove 135 is easy to process.

[0054] Of course, in the present embodiment, the flow guide portion 133 can also be a boss, which blocks the condensate water from flowing along the length direction.

[0055] In the embodiment, the flat tube 130 is in the shape of a long rectangle, and the cross section is rectangular. The recess 135 is arranged on the two sides of the flat tube 130 in the width direction or on one side. Whether the recess 135 is arranged on one side or on both sides can be determined according to the gap between the side wall of the water collecting tray 313 and the flat tube 130.

[0056] Secondly, the recess 135 can also be an annular groove arranged in a circle along the circumference of the flat tube 130.

[0057] In the embodiment, the recess 135 is arranged in the direction perpendicular to the length direction of the flat tube 130. That is, the recess 135 is arranged in the vertical direction.

[0058] In the embodiment, the recess 135 is arranged in the direction perpendicular to the length direction of the flat tube 130. That is, the recess 135 is arranged in the vertical direction.

[0059] In some embodiments of the present application, the cross section of the recess 135 is one of a circular arc, a triangle, and a quadrilateral.

[0060] In the embodiment, the recess 135 is arranged in one of the above structures, which is more conducive to the downward flow of the condensed water.

[0061] Of course, in some other embodiments of the present application, the recess 135 can also be in the shape of a pentagon, a hexagon, or other regular or irregular shapes.

[0062] Secondly, the two sides of the flat tube 130 in the width direction can also be processed into a wave shape or a zigzag shape, so as to avoid the condensed water flowing along the length direction of the flat tube 130.

[0063] Please refer to Figures 1 to 5 In the embodiment, the two sides of the flat tube 130 in the width direction are provided with a plurality of recesses 135 along the length direction. By arranging a plurality of recesses 135, the flat tube 130 can be divided into multiple sections by the recesses 135, which is more conducive to the downward flow of the condensed water.

[0064] Of course, in some other embodiments of the present application, only one recess 135 can be arranged at the corresponding position of the flat tube 130. For example, when the shape of the water collecting tray 313 is irregular, only one recess 135 is arranged in the area with a small gap, and no recess 135 is arranged in other areas. Secondly, the recess 135 can be arranged at the position between the corresponding adjacent two heat exchange fins 110 of the flat tube 130, or at the position of the corresponding heat exchange fin 110 of the flat tube 130. It can be seen that the number, size, shape, and arrangement position of the recess 135 can be arranged according to the shape of the water collecting tray 313.

[0065] The recess 135 is arranged at a position corresponding to the fin or the gap between the fins, so that the condensed water can flow downward more easily.

[0066] In this embodiment, the mounting groove 111 is arranged along the width direction of the heat exchange fin 110, and the mounting groove 111 penetrates one side of the heat exchange fin 110 in the width direction, and the flat tube 130 is mounted in the mounting groove 111 by penetrating one side of the heat exchange fin 110. The flat tube 130 is provided with a flow guide portion 133 at least corresponding to the side of the mounting groove 111 penetrating the heat exchange fin 110.

[0067] In this embodiment, one end of the mounting groove 111 penetrates the fin, so that the flat tube 130 is easy to install. Since the fin is penetrated, one end of the flat tube 130 in the length direction is not shielded, so that the condensed water can flow in the length direction more easily, and the flow guide portion 133 is arranged on this side, so that the condensed water can be prevented from leaking out.

[0068] Please refer to Figures 1 to 5 In this embodiment, one end of the mounting groove 111 located outside the flat tube heat exchanger 100 penetrates the end of the heat exchange fin 110. Of course, in other embodiments of the present application, the inside can also penetrate the heat exchange fin 110.

[0069] It should be noted that since the mounting groove 111 arranged on the heat exchange fin 110 penetrates the outside of the heat exchange fin 110, one end of the flat tube 130 corresponding to the outside in the width direction is not shielded by the fin, and the condensed water can flow in the length direction more easily, so that the condensed water can be prevented from leaking out. Therefore, in the case that the gap on this side is small, more recesses 135 can be arranged, so that the condensed water can be prevented from leaking out.

[0070] In this embodiment, the heat exchange fin 110 includes a first section 113, a second section 115 and a third section 117 connected by bending. The first section 113, the second section 115 and the third section 117 are all provided with a plurality of mounting grooves 111. The second section 115 is bent inward at the corresponding mounting groove 111 relative to the first section 113, and the third section 117 is bent inward at the corresponding mounting groove 111 relative to the second section 115. Some of the mounting grooves 111 penetrate the heat exchange fin 110 on one side corresponding to the outside of the flat tube heat exchanger 100.

[0071] Please refer to Figures 1 to 5 In this embodiment, the flat tube heat exchanger 100 is bent into three sections by bending the heat exchange fin 110, so that a larger area of the flat tube heat exchanger 100 can be arranged in the air conditioner 300, which is more conducive to heat exchange. Secondly, the mounting groove 111 penetrates the fin on the outside, so that the flat tube heat exchanger 100 is easy to bend.

[0072] In some embodiments of the present application, grooves 135 are provided at both ends of the width direction of all flat tubes 130. In this way, all flat tubes 130 of the flat tube heat exchanger 100 are of the same structure, and installation is more convenient.

[0073] Of course, in some embodiments of the present application, only one or several flat tubes 130 extending into the water pan 313 at both ends can be provided with grooves 135, and the rest can not be provided with grooves 135. This arrangement can save costs.

[0074] In summary, the flat tube heat exchanger 100 and the air conditioner 300 provided in the present embodiment block the flow of condensed water along the length direction of the flat tube 130 by providing a flow guide portion 133 outside the flat tube 130 of the heat exchanger, promote the downward flow of condensed water by the flow guide portion 133, shorten the accumulation and residence time of condensed water between the fins, thereby avoiding the formation of a condensed water path between the condensed water and the water pan 313, and improving the problem of condensed water flowing along the length direction outside the flat tube 130 and leaking outside the water pan 313.

[0075] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and therefore the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A flat tube heat exchanger, characterized in that: It comprises a plurality of heat exchange fins (110) and flat tubes (130); the plurality of heat exchange fins (110) are sequentially arranged at intervals, and all the heat exchange fins (110) are provided with mounting grooves (111); A heat exchange channel (131) is provided in the flat tube (130), and the flat tube (130) is installed in the installation groove (111) to exchange heat with all the heat exchange fins (110); A guide portion (133) is provided on the outside of the flat tube (130), and the guide portion (133) is used to guide condensed water to block the condensed water from flowing along the length direction of the flat tube (130).

2. The flat tube heat exchanger according to claim 1, characterized in that The flow guide portion (133) is arranged on one side or both sides of the width of the flat tube (130).

3. The flat tube heat exchanger according to claim 1 or 2, characterized in that: The outer periphery of the flat tube (130) is provided with a plurality of flow guides (133) at intervals along the length direction.

4. The flat tube heat exchanger according to claim 1 or 2, characterized in that: The flow guide portion (133) is a groove (135) provided on the outer periphery of the flat tube (130).

5. The flat tube heat exchanger according to claim 4, characterized in that The arrangement direction of the groove (135) is perpendicular to the length direction of the flat tube (130).

6. The flat tube heat exchanger according to claim 4, characterized in that The cross section of the groove (135) is one of an arc shape, a triangle, and a quadrilateral.

7. The flat tube heat exchanger according to claim 4, characterized in that At least one groove (135) is provided on the outer periphery of each flat tube (130), and the groove (135) is provided at a position between two adjacent heat exchange fins (110) corresponding to the flat tube (130) or at a position of the flat tube (130) corresponding to the heat exchange fins (110).

8. The flat tube heat exchanger according to claim 1 or 2, characterized in that: The mounting groove (111) is arranged along the width direction of the heat exchange fin (110), and the mounting groove (111) passes through one side of the heat exchange fin (110) in the width direction. The flat tube (130) is installed in the mounting groove (111) from the side where the mounting groove (111) passes through the heat exchange fin (110); the flat tube (130) is provided with the guide portion (133) at least corresponding to the side where the mounting groove (111) passes through the heat exchange fin (110).

9. The flat tube heat exchanger according to claim 8, characterized in that The heat exchange fin (110) includes a first section (113), a second section (115), and a third section (117) that are bent and connected; The first section (113), the second section (115) and the third section (117) are all provided with a plurality of the mounting grooves (111); The second section (115) is bent inwardly at the corresponding mounting groove (111) relative to the first section (113), and the third section (117) is bent inwardly at the corresponding mounting groove (111) relative to the second section (115); The mounting groove (111) corresponds to a side of the outer side of the flat tube heat exchanger (100) and penetrates the heat exchange fin (110).

10. An air conditioner, characterized in that: The air conditioner (300) comprises an indoor unit body (311) and the flat tube heat exchanger (100) according to any one of claims 1 to 9; The flat tube heat exchanger (100) is installed in the indoor unit body (311). A water receiving pan (313) is provided in the indoor unit body (311), and the water receiving pan (313) corresponds to an end of the flat tube heat exchanger (100).

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