Heat exchanger

Abstract

The utility model provides a heat exchanger which comprises a first collecting pipe, a second collecting pipe and a plurality of heat exchange pipes, the heat exchange pipes are located between the first collecting pipe and the second collecting pipe, each heat exchange pipe is communicated with the first collecting pipe and the second collecting pipe, and the heat exchange pipes are connected with the first collecting pipe in a welded mode. The water guide piece is installed on the heat exchange pipe, the water guide piece is arranged close to the first collecting pipe, the water guide piece comprises a shielding part and a drainage part which are connected with each other, the shielding part extends in the width direction of the heat exchange pipe and is connected with the heat exchange pipe, and the drainage part is located on the outer side of the heat exchange pipe and is connected with the first collecting pipe in the length direction of the heat exchange pipe. And the water guide piece covers a welding seam of the heat exchange pipe and the first collecting pipe. Through the technical scheme provided by the invention, the problem that electrochemical corrosion is generated between the heat exchange pipe and the first collecting pipe due to the fact that condensate water scours a welding seam between the heat exchange pipe and the first collecting pipe in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and in particular to a heat exchanger. Background Art

[0002] Existing heat exchangers are often used in devices such as air conditioners. The heat exchanger includes a header, a liquid outlet pipe, and multiple heat exchange tubes. The multiple heat exchange tubes are arranged between the header and the liquid outlet pipe. The header is located below the heat exchange tube, and the liquid outlet pipe is located above the heat exchange tube. Fins are arranged between two adjacent heat exchange tubes. During use, the heat exchanger is usually placed vertically, that is, the heat exchange tubes and fins extend in the vertical direction, and the header extends in the horizontal direction. Condensed water will adhere to the heat exchange tubes and fins (when used as an evaporator). The condensed water will flow along the heat exchange tubes and fins to the bottom of the heat exchanger, that is, to the header. Since the heat exchanger is blown by a fan during operation, if the water is not drained in time, the heat exchanger will be flooded, affecting the normal use of devices such as air conditioners.

[0003] Among them, in the prior art, in order to solve the above-mentioned problems, a water collecting structure is usually set at the bottom of the collecting tube. However, condensed water will wash the welds between the heat exchange tubes and the collecting tubes. When the condensed water contains ionic impurities, electrochemical corrosion will occur between the heat exchange tubes and the collecting tubes, thereby causing refrigerant leakage, and further causing failures of equipment such as air conditioners. Utility Model Content

[0004] The utility model provides a heat exchanger to solve the problem in the prior art that condensed water washes the weld between the heat exchange tube and the header, thus causing electrochemical corrosion between the heat exchange tube and the header.

[0005] The utility model provides a heat exchanger, which comprises: a first collecting pipe, a second collecting pipe and a plurality of heat exchange tubes, wherein the plurality of heat exchange tubes are located between the first collecting pipe and the second collecting pipe, each heat exchange tube is connected to the first collecting pipe and the second collecting pipe respectively, and the heat exchange tube is welded to the first collecting pipe; a water guide member is installed on the heat exchange tube, and the water guide member is arranged close to the first collecting pipe, the water guide member comprises a shielding part and a drainage part which are connected to each other, the shielding part is extended along the width direction of the heat exchange tube, the shielding part is connected to the heat exchange tube, the drainage part is located on the outside of the heat exchange tube, and along the length direction of the heat exchange tube, the water guide member covers the welding seam between the heat exchange tube and the first collecting pipe.

[0006] Furthermore, the shielding portion includes a shielding plate, both ends of the shielding plate in the width direction extend to the outside of the heat exchange tube, and the guide portion includes a guide plate, the shielding plate and the guide plate are connected to each other, and the guide plate extends along the width direction of the shielding plate in a direction away from the shielding plate. Along the length direction of the heat exchange tube, the guide plate is arranged closer to the first collecting pipe than the shielding plate.

[0007] Furthermore, a plurality of slots are arranged on the shielding plate, and the plurality of slots are arranged at intervals along the length direction of the shielding plate. The plurality of slots are arranged corresponding to the plurality of heat exchange tubes one by one, and the heat exchange tubes are inserted into the slots.

[0008] Furthermore, the shielding plate is arranged obliquely, and has a free end and a connecting end which are arranged relatively to each other, the connecting end is arranged closer to the first collecting pipe than the free end, and the guide plate is arranged at the connecting end of the shielding plate.

[0009] Furthermore, a drainage structure is provided on the drainage plate, and the drainage structure is arranged along the extension direction of the drainage plate. The drainage structure is a groove or a protrusion. There are one or more drainage structures. When there are multiple drainage structures, the multiple drainage structures are arranged at intervals along the length direction of the drainage plate.

[0010] Furthermore, a drainage structure is provided on the drainage plate, and the drainage structure is arranged along the extension direction of the drainage plate. The drainage structure is a groove or a protrusion. There are one or more drainage structures. When there are multiple drainage structures, the multiple drainage structures are arranged at intervals along the length direction of the drainage plate.

[0011] Furthermore, a coating is provided on the water guide.

[0012] Furthermore, a projection of the first header along the vertical direction is located inside the water guide.

[0013] Furthermore, the angle between the shielding plate and the horizontal direction is set between 0 and 60 degrees.

[0014] Furthermore, the shielding plate is fixed to the heat exchange tube by welding.

[0015] By applying the technical solution of the utility model, the two ends of each heat exchange tube pass through the tube walls of the first header and the second header respectively to connect the first header and the second header, the first header is located below the second header, the shielding part is arranged above the first header, the shielding part can shield the weld between the heat exchange tube and the first header to prevent condensed water from flowing between the heat exchange tube and the first header, and the drainage part can drain the condensed water to the outside of the heat exchange tube to prevent condensed water from gathering at the bottom of the heat exchanger. Such an arrangement can avoid electrochemical corrosion between the heat exchange tube and the first header, thereby avoiding refrigerant leakage, and further ensuring the normal operation of air conditioners and other devices. At the same time, the water guide can also play a role in wind protection to prevent water from floating on the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1The schematic diagram of the structure of the heat exchanger provided by the utility model is shown;

[0018] Figure 2 A side view of the heat exchanger provided by the utility model is shown;

[0019] Figure 3 The schematic diagram of the structure of the water guide member provided by the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. The first header;

[0022] 20. Heat exchange tube;

[0023] 30. Water guide parts;

[0024] 31. shielding plate; 311. slot; 312. free end; 313. connection end;

[0025] 32. Drainage plate;

[0026] 40. The second collecting pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a heat exchanger, which includes a first header 10, a second header 40, a plurality of heat exchange tubes 20 and a water guide 30. The plurality of heat exchange tubes 20 are located between the first header 10 and the second header 40, each heat exchange tube 20 is connected to the first header 10 and the second header 40, and the heat exchange tube 20 is welded to the first header 10. The water guide 30 is installed on the heat exchange tube 20, and the water guide 30 is arranged close to the first header 10. The water guide 30 includes a shielding part and a drainage part that are connected to each other. The shielding part extends along the width direction of the heat exchange tube 20, and the shielding part is connected to the heat exchange tube 20. The shielding part is used to block the condensed water on the heat exchange tube 20. The drainage part is located on the outside of the heat exchange tube 20. Along the length direction of the heat exchange tube 20, the water guide 30 covers the welding weld between the heat exchange tube 20 and the first header 10, and the drainage part is used to drain the condensed water. As shown Figure 1As shown, the X direction is the length direction of the first header 10, and the Z direction is the length direction of the heat exchange tube 20. In the present application, the heat exchanger is a microchannel heat exchanger, the heat exchange tube 20 is a flat tube, the microchannel heat exchanger further includes fins (not shown in the drawings), and the water guide 30 is arranged between the first header 10 and the fins.

[0029] In one embodiment, the fins are disposed between adjacent heat exchange tubes 20 , and the fins extend in a wave shape along the length direction of the heat exchange tubes 20 .

[0030] In another embodiment, a plurality of inserting grooves are arranged at intervals along the length direction of the fin, and the plurality of inserting grooves are arranged in one-to-one correspondence with the plurality of heat exchange tubes 20, and the heat exchange tubes 20 are inserted into the inserting grooves.

[0031] By applying the technical solution of the present application, the two ends of each heat exchange tube 20 pass through the tube walls of the first header 10 and the second header 40 to connect the first header and the second header, the first header is located below the second header, and the shielding part is arranged above the first header 10. The shielding part can shield the weld between the heat exchange tube 20 and the first header 10 to prevent condensed water from flowing between the heat exchange tube 20 and the first header 10, and the drainage part can drain the condensed water to the outside of the heat exchange tube 20 to prevent the condensed water from gathering at the bottom of the heat exchanger. Such a configuration can avoid electrochemical corrosion between the heat exchange tube 20 and the first header 10, thereby avoiding refrigerant leakage, and further ensuring the normal operation of air conditioners and other devices. At the same time, the water guide 30 can also play a role in wind protection to prevent water from floating on the heat exchanger.

[0032] Among them, in the prior art, in order to avoid water from flowing out of the heat exchanger, a water collection structure is usually set at the bottom of the manifold. In order to ensure the technical effect of the water collection structure, the water collection structure is usually set larger, but this will cause the volume of the heat exchanger to be larger, which is not convenient for arranging the heat exchanger. However, in the present application, the water collection structure can be set at the bottom of the drainage part, and the water collection structure is set corresponding to the drainage part, so as to avoid water from flowing out of the heat exchanger while reducing the volume of the heat exchanger, which is convenient for arranging the heat exchanger.

[0033] like Figure 3As shown, the shielding part includes a shielding plate 31, and both ends of the shielding plate 31 along the width direction extend to the outside of the heat exchange tube 20, and the B direction is the width direction of the shielding plate 31. The drainage part includes a drainage plate 32, and the shielding plate 31 and the drainage plate 32 are connected to each other. The drainage plate 32 extends in the direction away from the shielding plate 31 along the width direction of the shielding plate 31. Along the length direction of the heat exchange tube 20, the drainage plate 32 is arranged closer to the first header 10 than the shielding plate 31. In this way, the structure of the water guide 30 is simple, which is convenient for processing the water guide 30 and for discharging condensed water. In addition, the drainage plate 32 extends in the direction away from the shielding plate 31 along the width direction of the shielding plate 31, which can prevent the condensed water from flowing back between the heat exchange tube 20 and the first header 10, and ensure the drainage effect of the drainage plate 32.

[0034] Specifically, the shielding plate 31 is provided with a plurality of slots 311, which are arranged at intervals along the length direction of the shielding plate 31, and the plurality of slots 311 are arranged one by one corresponding to the plurality of heat exchange tubes 20, and the heat exchange tubes 20 are inserted into the slots 311. The length direction of the shielding plate 31 is the X direction. Such an arrangement can ensure the shielding effect of the shielding plate 31 on the weld between the heat exchange tube 20 and the first header 10, and at the same time facilitate the processing of the shielding plate 31, with a simple structure and convenient operation.

[0035] Furthermore, a drainage structure is provided on the drainage plate 32, and the drainage structure is provided along the extension direction of the drainage plate 32, that is, the drainage structure extends along the width direction of the drainage plate 32. The drainage structure is a groove or a protrusion, and there are one or more drainage structures. When there are multiple drainage structures, the multiple drainage structures are arranged at intervals along the length direction of the drainage plate 32. Such an arrangement can further ensure the accuracy of the condensed water flow, further ensure that the condensed water can flow into the water collection structure, and at the same time facilitate the processing of the drainage plate 32, with a simple structure and convenient operation.

[0036] The shielding plate 31 is tilted, and has a free end 312 and a connection end 313 that are relatively arranged, the connection end 313 is arranged closer to the first header 10 than the free end 312, and the guide plate 32 is arranged at the connection end 313 of the shielding plate 31. This arrangement facilitates the drainage of condensed water to the guide plate 32, thereby ensuring that the condensed water can flow into the water collection structure.

[0037] Furthermore, a drainage structure is provided on the drainage plate 32, and the drainage structure is provided along the extension direction of the drainage plate 32, that is, the drainage structure extends along the width direction of the drainage plate 32. The drainage structure is a groove or a protrusion, and there are one or more drainage structures. When there are multiple drainage structures, the multiple drainage structures are arranged at intervals along the length direction of the drainage plate 32. Such an arrangement can further ensure the accuracy of the condensed water flow, further ensure that the condensed water can flow into the water collection structure, and at the same time facilitate the processing of the drainage plate 32, with a simple structure and convenient operation.

[0038] Specifically, a drainage groove or a drainage rib may be provided on the drainage plate 32. More specifically, the drainage structure is a groove or a protrusion. It should be noted that there is no limit to the number of grooves or protrusions, which may be one or more, and the multiple grooves or protrusions are arranged at intervals.

[0039] Further, a coating is provided on the shielding plate 31 and the guide plate 32. In this way, the coating can protect the shielding plate 31 and the guide plate 32, improve the service life of the shielding plate 31 and the guide plate 32, and prevent the shielding plate 31 and the guide plate 32 from rusting.

[0040] Among them, in the present application, the coating on the baffle plate 31 and the drain plate 32 is a hydrophilic coating. Such a setting can further improve the smoothness of the flow of condensed water and avoid the accumulation of condensed water on the baffle plate 31 and the drain plate 32.

[0041] Specifically, the projection of the first header 10 in the vertical direction is located inside the water guide 30. This arrangement can prevent condensed water from flowing onto the first header 10. When the heat exchanger is used as an evaporator, the first header 10 contains a low-temperature refrigerant. When the evaporation temperature of the refrigerant is less than 0°C, if the condensed water flows to the outer wall of the first header 10, there may be a risk of freezing, thereby affecting the normal use of the first header 10. However, this arrangement can reduce the risk of freezing of the outer wall of the first header 10, ensure the normal use of the first header 10, and at the same time increase the service life of the first header 10.

[0042] Furthermore, the angle between the shielding plate 31 and the horizontal direction is set between 0 and 60 degrees, that is, Figure 2As shown, the angle A between the shielding plate 31 and the horizontal direction is set between 0 and 60°. Among them, when the angle between the shielding plate 31 and the horizontal direction is greater than 60°, in order to ensure that both ends of the shielding plate 31 in the width direction extend to the outside of the heat exchange tube 20, the width dimension of the shielding plate 31 is relatively large, which increases the cost of the water guide 30, and the distance between the free end 312 of the shielding plate 31 and the first header 10 is relatively large, so that condensed water is likely to accumulate on the heat exchange tube 20 and the fins between the shielding plate 31 and the first header 10, and the condensed water can flow between the heat exchange tube 20 and the first header 10. Therefore, setting the angle between the shielding plate 31 and the horizontal direction between 0 and 60° can not only reduce the cost of the water guide 30, but also avoid the accumulation of condensed water on the heat exchange tube 20 and the fins between the shielding plate 31 and the first header 10. Optionally, the angle between the shielding plate 31 and the horizontal direction may be 0°, 30° or 60°. In the present application, the angle between the shielding plate 31 and the horizontal direction is 30°.

[0043] The shielding plate 31 is welded and fixed to the heat exchange tube 20. Such a configuration can ensure the connection stability between the shielding plate 31 and the heat exchange tube 20 and prevent the shielding plate 31 from falling. In the present application, when installing the water guide 30, the water guide 30 is first plugged into the heat exchange tube 20, the groove 311 is pre-tightened with the heat exchange tube 20, and then the shielding plate 31 is brazed and fixed to the heat exchange tube 20.

[0044] Specifically, the heat exchanger further includes a water receiving trough, which is arranged below the drainage portion and extends to both ends of the first header 10 along the extension direction of the first header 10. The water collecting structure is the water receiving trough. Such an arrangement has a simple structure and is convenient for processing and arranging the water collecting structure.

[0045] It should be noted that the terms used herein are only for describing specific embodiments 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0047] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0050] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heat exchanger, characterized in that: The heat exchanger comprises: A first header (10), a second header (40) and a plurality of heat exchange tubes (20), wherein the plurality of heat exchange tubes (20) are located between the first header (10) and the second header (40), each of the heat exchange tubes (20) is connected to the first header (10) and the second header (40), and the heat exchange tubes (20) are connected to the first header (10) by welding; A water guide (30) is installed on the heat exchange tube (20), and the water guide (30) is arranged close to the first header (10). The water guide (30) comprises a shielding portion and a drainage portion which are connected to each other. The shielding portion is extended along the width direction of the heat exchange tube (20), and the shielding portion is connected to the heat exchange tube (20). The drainage portion is located on the outside of the heat exchange tube (20). Along the length direction of the heat exchange tube (20), the water guide (30) covers the welding seam between the heat exchange tube (20) and the first header (10).

2. The heat exchanger according to claim 1, characterized in that: The shielding portion comprises a shielding plate (31), both ends of which along the width direction extend to the outside of the heat exchange tube (20), and the guide portion comprises a guide plate (32), the shielding plate (31) and the guide plate (32) are connected to each other, and the guide plate (32) extends in a direction away from the shielding plate (31) along the width direction of the shielding plate (31), and along the length direction of the heat exchange tube (20), the guide plate (32) is arranged closer to the first collecting pipe (10) than the shielding plate (31).

3. The heat exchanger according to claim 2, characterized in that: The shielding plate (31) is provided with a plurality of slots (311), the plurality of slots (311) are arranged at intervals along the length direction of the shielding plate (31), the plurality of slots (311) are arranged in one-to-one correspondence with the plurality of heat exchange tubes (20), and the heat exchange tubes (20) are inserted into the slots (311).

4. The heat exchanger according to claim 2 or 3, characterized in that: The shielding plate (31) is arranged at an angle, and has a free end (312) and a connecting end (313) arranged opposite to each other, the connecting end (313) being arranged closer to the first collecting pipe (10) than the free end (312), and the guide plate (32) being arranged at the connecting end (313) of the shielding plate (31).

5. The heat exchanger according to claim 2 or 3, characterized in that: The guide plate (32) is provided with a guide structure, the guide structure is arranged along the extension direction of the guide plate (32), the guide structure is a groove or a protrusion, there are one or more guide structures, and when there are multiple guide structures, the multiple guide structures are arranged at intervals along the length direction of the guide plate (32).

6. The heat exchanger according to claim 4, characterized in that The guide plate (32) is provided with a guide structure, the guide structure is arranged along the extension direction of the guide plate (32), the guide structure is a groove or a protrusion, there are one or more guide structures, and when there are multiple guide structures, the multiple guide structures are arranged at intervals along the length direction of the guide plate (32).

7. The heat exchanger according to claim 1, characterized in that The water guide is provided with a coating.

8. The heat exchanger according to claim 1, characterized in that The projection of the first header (10) in the vertical direction is located inside the water guide (30).

9. The heat exchanger according to claim 2, characterized in that: The angle between the shielding plate (31) and the horizontal direction is set between 0 and 60 degrees.

10. The heat exchanger according to claim 2, characterized in that The shielding plate (31) is fixed to the heat exchange tube (20) by welding.

Images