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 flat tube is provided with a plurality of heat exchange runners. A plurality of mounting grooves and at least one bending groove are formed in each heat exchange fin at intervals in the length direction, and one side of each bending groove penetrates through the first side of the corresponding heat exchange fin in the width direction. All the heat exchange fins are bent towards the second side in the width direction of the heat exchange fins at the positions corresponding to the bending grooves. The first side and the second side are the two sides of the heat exchange fin in the width direction. All the heat exchange fins are sequentially arranged at intervals in the thickness direction of the heat exchange fins. And all the flat pipes are correspondingly mounted in the mounting grooves. Bending of the flat tube heat exchanger can be better achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, and in particular to a flat tube heat exchanger and an air conditioner. Background Art

[0002] In order to increase the heat transfer area of ​​a heat exchanger within a limited space, the prior art generally uses a heat exchanger that is bent to form a bent multi-stage design to improve the heat transfer efficiency and space utilization of the heat exchanger.

[0003] There are many ways to produce a bent heat exchanger in the prior art. One of them is to first make a flat plate heat exchanger, and then bend the flat plate heat exchanger into a desired shape according to a preset shape using a mold or other means.

[0004] However, in a flat tube heat exchanger, since the flat tube is larger in volume than an existing round tube heat exchanger, it is not easy to bend when the plate heat exchanger is bent and may even crack. Utility Model Content

[0005] The problem solved by the utility model is that in a flat tube heat exchanger, since the flat tube is larger in volume than the existing round tube heat exchanger, it is not easy to bend when the plate heat exchanger is bent and even cracks easily occur.

[0006] In order to solve the above problems, the utility model provides a flat tube heat exchanger and an air conditioner, which can more conveniently bend the flat tube heat exchanger.

[0007] In a first aspect, the present invention provides a flat tube heat exchanger comprising a plurality of heat exchange fins and flat tubes;

[0008] The flat tube has a plurality of heat exchange channels;

[0009] All the heat exchange fins are provided with a plurality of mounting grooves and at least one bending groove at intervals along the length direction, and one side of the bending groove passes through the first side of the heat exchange fin in the width direction;

[0010] All the heat exchange fins are bent toward the second side in the width direction of the heat exchange fin at positions corresponding to the bending grooves; wherein the first side and the second side are two sides in the width direction of the heat exchange fin;

[0011] All the heat exchange fins are arranged in sequence and spaced apart in the thickness direction of the heat exchange fins;

[0012] All the flat tubes are correspondingly installed in the installation grooves.

[0013] The present application provides bending grooves at corresponding positions on all heat exchange fins, and the bending grooves extend through a first side in the width direction of the heat exchange fins. In this way, when manufacturing a multi-section bent flat tube heat exchanger, a flat plate-shaped flat tube heat exchanger is first manufactured, and then the flat plate-shaped flat tube heat exchanger is bent from the bending grooves toward a second direction in the width direction of the heat exchange fins using a mold or other tooling equipment. The provision of the bending grooves makes bending easier and can improve the problem of cracks occurring during bending.

[0014] In an optional embodiment, the bending groove is correspondingly arranged above or below the mounting groove and is communicated with the mounting groove.

[0015] The present application connects the bending groove with the mounting groove, which facilitates the production of the fins and reduces the difficulty of processing the heat exchange fin mold.

[0016] In an optional embodiment, a side of the bending groove close to the second side of the heat exchange fin extends to the outside of the mounting groove.

[0017] In this application, the bending groove extends outward from the end closest to the second side. This allows the center of rotation to be located outside the flat tube during bending, making bending more efficient. Extending the bending groove to the outside of the flat tube also prevents the connection between the flat tube and the heat exchange fin from being pulled apart during bending, thereby affecting the connection strength.

[0018] In an optional embodiment, the bending groove is arranged above the installation groove, and the lower side wall of the flat tube arranged in the installation groove connected to the bending groove is connected to the heat exchange fin.

[0019] Since the bending groove is formed on the upper part of the flat tube, the flat lower side wall is connected to the fin, which can also ensure the connection strength of the flat tube.

[0020] In an optional embodiment, all of the mounting grooves pass through the first side in the width direction of the heat exchange fin.

[0021] In the present application, all the installation grooves pass through the first side of the heat exchange fin in the width direction, which makes it easier to install the flat tubes.

[0022] In an optional embodiment, the flat tubes and the heat exchange fins are connected by brazing.

[0023] This application allows the flat tubes and heat exchange fins to be connected by brazing, which can ensure the connection strength

[0024] In an optional embodiment, all the heat exchange fins are provided with two bending grooves, and a plurality of mounting grooves are spaced between the two bending grooves.

[0025] The present application provides two bending grooves so that a three-section flat tube heat exchanger can be bent to form a bent shape.

[0026] In an optional embodiment, each of the bending grooves is arranged at the same position in the length direction of the heat exchange fin.

[0027] In this application, the bending grooves are arranged at the same position along the length direction of the heat exchange fins, which facilitates bending.

[0028] In an optional embodiment, the heat exchange fin is provided with a bending groove.

[0029] In a second aspect, the present invention provides an air conditioner, comprising the flat tube heat exchanger according to any one of the aforementioned embodiments, wherein the flat tube heat exchanger is arranged in the outdoor unit and / or indoor unit of the air conditioner.

[0030] The air conditioner provided in the present application adopts a flat tube heat exchanger, which can increase the heat exchange area and improve the heat exchange effect by bending at the bending groove, and can also improve space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of an indoor unit of an air conditioner provided in an embodiment of the present utility model;

[0032] Figure 2 A schematic structural diagram of an outdoor unit of an air conditioner provided in an embodiment of the present utility model;

[0033] Figure 3 A schematic diagram of the structure of the flat tube heat exchanger provided in an embodiment of the present invention before being bent;

[0034] Figure 4 A structural schematic diagram of a three-section flat tube heat exchanger is provided for an embodiment of the present utility model.

[0035] Icon: 100-flat tube heat exchanger; 110-heat exchange fin; 111-mounting groove; 113-bending groove; 115-first side; 117-second side; 130-flat tube; 300-air conditioner; 310-outdoor unit; 330-indoor unit. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Please refer to Figures 1 to 4 The present invention provides an air conditioner 300, which includes an indoor unit 330 and an outdoor unit 310. Both the indoor unit 330 and the outdoor unit 310 are provided with a heat exchanger. The heat exchanger provided in the outdoor unit 310 exchanges heat with the outdoor environment. The heat exchanger provided in the indoor unit 330 exchanges heat with the indoor environment.

[0038] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the heat exchanger provided in the indoor unit 330 is a flat tube heat exchanger 100. This flat tube heat exchanger 100 can be a three-stage type or an arc-shaped flat tube heat exchanger 100, which can be semi-enclosed and housed outside the crossflow impeller. Alternatively, the heat exchanger provided in the outdoor unit 310 can be a flat tube heat exchanger 100, which can be an "L"-shaped flat tube heat exchanger 100, installed within the fan cavity of the outdoor unit 310. Of course, both the heat exchanger provided in the indoor unit 330 and the heat exchanger provided in the outdoor unit 310 can be flat tube heat exchangers 100.

[0039] Please refer to Figures 1 to 4 In this embodiment, the flat tube heat exchanger 100 includes a plurality of heat exchange fins 110 and flat tubes 130. The flat tubes 130 have a plurality of heat exchange flow channels. All the heat exchange fins 110 are provided with a plurality of mounting grooves 111 and at least one bending groove 113 spaced apart along the length direction. One side of the bending groove 113 passes through the first side 115 in the width direction of the heat exchange fin 110. All the heat exchange fins 110 are bent toward the second side 117 in the width direction of the heat exchange fin 110 at the position corresponding to the bending groove 113. The first side 115 and the second side 117 are two sides in the width direction of the heat exchange fin 110. All the heat exchange fins 110 are spaced apart in sequence in the thickness direction of the heat exchange fin 110. All the flat tubes 130 are correspondingly installed in the mounting grooves 111.

[0040] In this embodiment, bending grooves 113 are provided at corresponding positions on all heat exchange fins 110, and the bending grooves 113 extend through a first side 115 in the width direction of the heat exchange fins 110. Thus, when manufacturing a multi-section bent flat tube heat exchanger 100, a flat plate-shaped flat tube heat exchanger 100 is first manufactured. Then, a mold or other tooling is used to bend the flat plate-shaped flat tube heat exchanger 100 from the bending grooves 113 toward a second direction in the width direction of the heat exchange fins 110. The provision of the bending grooves 113 facilitates bending and alleviates the problem of cracks occurring during bending.

[0041] It should be noted that when the flat tube heat exchanger 100 provided in this embodiment is manufactured: the heat exchange fins 110 are first prepared by stamping or laser cutting, and the heat exchange fins 110 are not bent at the bend. Afterwards, the heat exchange fins 110 are arranged in sequence along the thickness direction on the corresponding mold. Next, all the flat tubes 130 are installed in the mounting grooves 111 respectively, and then the heat exchange fins 110 and the flat tubes 130 are connected by welding to form a flat plate heat exchanger. Finally, the flat plate heat exchanger is bent along the position where the bending groove 113 is set using a bending device or a bending mold, thereby making a flat tube heat exchanger 100 with a preset bending shape. This has a lower production cost and is more convenient.

[0042] In this embodiment, the bending groove 113 is correspondingly disposed above the mounting groove 111 and communicates with the mounting groove 111 .

[0043] In this embodiment, the bending groove 113 is connected to the mounting groove 111 , which facilitates the production of the fins and reduces the difficulty of machining the mold for the heat exchange fins 110 .

[0044] Secondly, the bending groove 113 is set at the top. After bending behind the bending groove 113, the upper surface of the flat tube heat exchanger 100 is exposed. The airflow passing through flows along the condensation surface and combines with the change of the temperature boundary layer to promote heat exchange and improve the condensation problem.

[0045] Of course, in some other embodiments of the present application, the bending groove 113 can also be provided below the mounting groove 111 and communicate with the mounting groove 111. Secondly, the bending groove 113 can also be provided at the position where the fin is located between the two mounting grooves 111 and not communicate with the mounting groove 111.

[0046] In this embodiment, a side of the bending groove 113 close to the second side 117 of the heat exchange fin 110 extends to the outside of the mounting groove 111 .

[0047] In this embodiment, the bending groove 113 extends from the end closest to the second side 117 to the outside of the mounting groove 111. This allows the center of rotation to be positioned outside the flat tube 130 during bending, making bending more efficient and enabling greater bending angles. Extending the bending groove 113 to the outside of the flat tube 130 also prevents the connection between the flat tube 130 and the heat exchange fin 110 from being pulled apart during bending, thereby compromising the connection strength.

[0048] In this embodiment, the lower sidewall of the flat tube 130 disposed in the mounting groove 111 communicating with the bending groove 113 is connected to the heat exchange fin 110. Of course, the side of the flat tube 130 located on the second side 117 can also be connected to the heat exchange fin 110.

[0049] The flat tubes 130 have bending grooves 113 formed on their upper surfaces, connecting their flat lower sidewalls to the fins. This ensures the connection strength of the flat tubes 130. The upper surfaces of the flat tubes 130 are not connected to the heat exchange fins 110, thus minimizing the bending effect. The flat tubes 130 and heat exchange fins 110 are connected by brazing.

[0050] In this embodiment, all the mounting grooves 111 pass through the first side 115 of the heat exchange fin 110 in the width direction.

[0051] Please refer to Figures 1 to 4 In this embodiment, all the installation grooves 111 pass through the first side 115 in the width direction of the heat exchange fin 110, which facilitates the installation of the flat tube 130. During installation, the flat tube 130 can be inserted into the installation groove 111 from the passing side without having to be installed from the end, thereby improving installation efficiency.

[0052] In this embodiment, the bending groove 113 is a rectangular long groove, which is greater than the length of the mounting groove 111 in the width direction of the heat exchange fin 110. The portion of the bottom of the bending groove 113 corresponding to the mounting groove 111 is connected to the mounting groove 111. The width of the bending groove 113 (i.e., the size in the length direction of the heat exchange fin 110) can be set according to the bending angle. For example, when the bending angle is large, the width of the bending groove 113 can be set wider, and when the bending angle is small, the width of the bending groove 113 can also be set smaller. Secondly, the end of the bending groove 113 is provided with an arc chamfer, and can even be set to a semicircle, so as to avoid stress concentration during bending and tearing or breaking the connection.

[0053] In this embodiment, each bending groove 113 is positioned uniformly along the length of the heat exchange fin 110. For example, when only one bending groove 113 is provided, the distance between the bending groove 113 and the end of each heat exchange fin 110 is the same. This can also be understood as the structure of all heat exchange fins 110 being identical.

[0054] In this embodiment, the bending grooves 113 are arranged at the same position along the length direction of the heat exchange fins 110, which facilitates bending.

[0055] Please refer to Figure 1 In one embodiment, the flat tube heat exchanger 100 is applied to an indoor unit 330 and generally has a three-stage structure. All heat exchange fins 110 are provided with two bending grooves 113, and a plurality of mounting grooves 111 are spaced between the two bending grooves 113.

[0056] In this embodiment, two bending grooves 113 are provided to form a three-section flat tube heat exchanger 100. The distance between the two bending grooves 113 can be set according to the length of each section of the three-section flat tube heat exchanger 100.

[0057] Referring to Figure 2, in another embodiment, when the flat tube heat exchanger 100 is used in an outdoor unit 310, it is typically a two-stage L-shaped structure. The heat exchange fins 110 are provided with a bending groove 113. The flat plate heat exchanger is bent along the corresponding bending groove 113 to form an L-shape.

[0058] Secondly, the heat exchange fins 110 may be provided with three, four, or more bending grooves 113. The number of bending grooves 113 can be set according to the desired shape of the heat exchanger. For example, if three sections are required, each heat exchange fin 110 can be provided with two bending grooves 113. To bend the heat exchanger into an arc shape, more bending grooves 113 are required. The more bending grooves 113 there are, the closer the resulting shape will be to an arc.

[0059] In summary, the flat tube heat exchanger 100 and the air conditioner 300 provided in this embodiment provide bending grooves 113 at corresponding positions on all the heat exchange fins 110, and the bending grooves 113 extend through the first side 115 in the width direction of the heat exchange fins 110. In this way, when manufacturing a multi-section bent flat tube heat exchanger 100, a flat plate-shaped flat tube heat exchanger 100 is first manufactured. Then, the flat plate-shaped flat tube heat exchanger 100 is bent from the bending grooves 113 toward the second direction in the width direction of the heat exchange fins 110 using a mold or other tooling equipment. The provision of the bending grooves 113 facilitates bending and can improve the problem of cracks occurring during bending.

[0060] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. A flat tube heat exchanger, characterized in that: The flat tube heat exchanger includes a plurality of heat exchange fins (110) and flat tubes (130); The flat tube (130) has a plurality of heat exchange channels; All the heat exchange fins (110) are provided with a plurality of mounting grooves (111) and at least one bending groove (113) at intervals along the length direction, and one side of the bending groove (113) passes through a first side (115) in the width direction of the heat exchange fin (110); All of the heat exchange fins (110) are bent toward a second side (117) in the width direction of the heat exchange fin (110) at positions corresponding to the bending grooves (113); wherein the first side (115) and the second side (117) are two sides in the width direction of the heat exchange fin (110); All the heat exchange fins (110) are sequentially spaced apart in the thickness direction of the heat exchange fins (110); All the flat tubes (130) are correspondingly installed in the installation grooves (111).

2. The flat tube heat exchanger according to claim 1, characterized in that The bending groove (113) is correspondingly arranged above or below the installation groove (111) and is communicated with the installation groove (111).

3. The flat tube heat exchanger according to claim 2, characterized in that A side of the bending groove (113) close to the second side (117) of the heat exchange fin (110) extends to the outside of the mounting groove (111).

4. The flat tube heat exchanger according to claim 3, characterized in that The bending groove (113) is arranged above the installation groove (111), and the lower side wall of the flat tube (130) arranged in the installation groove (111) connected to the bending groove (113) is connected to the heat exchange fin (110).

5. The flat tube heat exchanger according to any one of claims 1 to 4, characterized in that: All of the mounting grooves (111) pass through the first side (115) in the width direction of the heat exchange fin (110).

6. The flat tube heat exchanger according to any one of claims 1 to 4, characterized in that: The flat tube (130) and the heat exchange fin (110) are connected by brazing.

7. The flat tube heat exchanger according to any one of claims 1 to 4, characterized in that: All the heat exchange fins (110) are provided with two bending grooves (113), and a plurality of mounting grooves (111) are spaced between the two bending grooves (113).

8. The flat tube heat exchanger according to any one of claims 1 to 4, characterized in that: Each of the bending grooves (113) is arranged at the same position in the length direction of the heat exchange fin (110).

9. The flat tube heat exchanger according to any one of claims 1 to 4, characterized in that: The heat exchange fin (110) is provided with a bending groove (113).

10. An air conditioner, characterized in that: The invention comprises the flat tube heat exchanger according to any one of claims 1 to 9, wherein the flat tube heat exchanger is arranged in the outdoor unit (310) and / or the indoor unit (330) of the air conditioner.

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