Heat exchanger and heating and ventilation equipment

Abstract

The heat exchanger comprises a collecting pipe and a plurality of heat exchange pipes arranged in parallel, and a first flow channel, a second flow channel, an input channel and a plurality of third flow channels are formed in the collecting pipe. According to the heat exchanger, external fluid to be subjected to heat exchange is introduced into the first flow channel through the input pipe and then distributed to the heat exchange pipes connected in parallel through the third flow channels, the heat exchanger is further provided with the second flow channel which forms a circulation loop with the first flow channel, the second flow channel can guide fluid in the first flow channel to the first flow channel again, and therefore heat exchange efficiency is improved. The fluid retention phenomenon of the first runner is improved, and the heat exchange performance of the heat exchanger is further improved. And moreover, the first flow channel is further provided with a first rectifying cavity, fluid output by the input pipe can be rectified, fluid flowing is more uniform, and then the heat exchange effect of the heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger and a heating, ventilation and air conditioning (HVAC) device. Background Art

[0002] The information provided in this section is only background information related to the present disclosure, and it does not necessarily represent the prior art.

[0003] Due to high heat exchange efficiency and good processing performance, parallel flow heat exchangers are widely used in automotive air conditioners, industrial production, and household and commercial air conditioners. In some applications, in order to ensure the drainage performance of the plate fin parallel flow heat exchanger, there is a method of arranging the header pipes in the vertical direction. When such a structure of the parallel flow heat exchanger is used as an evaporator, the following problems will occur: due to the influence of gravity, the refrigerant is likely to stay in the lower part of the space inside the header pipe. Especially for the header pipe at the refrigerant inlet side, due to its relatively large height, obvious downward retention of the refrigerant will occur. Especially when the refrigerant flow rate is insufficient, the difference in the refrigerant flow rate between the lower part and the upper part of the header pipe is very obvious, resulting in a decline in the overall heat exchange performance of the heat exchanger. Summary of the Utility Model

[0004] The purpose of the utility model is to at least solve the technical problem that refrigerant retention easily occurs inside the header pipe of the existing parallel flow heat exchanger, resulting in a decline in heat exchange performance. This purpose is achieved through the following technical solutions:

[0005] A first aspect of the utility model provides a heat exchanger, comprising:

[0006] A plurality of heat exchange pipes arranged in parallel;

[0007] A header pipe, in which a first flow channel, a second flow channel, an input channel and a plurality of third flow channels are formed. The first flow channel includes a first rectifying cavity and a shunt cavity. The plurality of third flow channels are arranged at intervals along the axial direction of the shunt cavity. The shunt cavity is communicated with the heat exchange pipes through the third flow channels. Axial ends of the second flow channel are respectively communicated with axial ends of the shunt cavity. The input channel is communicated with the shunt cavity through the first rectifying cavity. The input channel is used for allowing an external fluid to flow into the first rectifying cavity, and the first rectifying cavity is used for rectifying the fluid from the input channel.

[0008] The heat exchanger proposed by the present utility model introduces the external fluid to be heat-exchanged into the first flow channel through the input pipe, and then distributes it to a plurality of parallel heat exchange pipes through a plurality of third flow channels. The heat exchanger is also provided with a second flow channel that forms a circulation loop with the first flow channel. The second flow channel can redirect the fluid in the first flow channel back to the first flow channel, improving the fluid retention phenomenon in the first flow channel and further improving the heat exchange performance of the heat exchanger. Moreover, the first flow channel also has a first rectifying cavity that can rectify the fluid output by the input pipe, making the fluid flow more uniformly, thereby improving the heat exchange effect of the heat exchanger.

[0009] In addition, the heat exchanger according to the present utility model may further have the following additional technical features:

[0010] In some embodiments of the present utility model, a first throttle hole is provided at the connection between the input channel and the first rectifying cavity, and the input channel is communicated with the first rectifying cavity through the first throttle hole.

[0011] In some embodiments of the present utility model, a second throttle hole is provided at the connection between the first rectifying cavity and the flow dividing cavity, and the first rectifying cavity is communicated with the first flow channel through the second throttle hole.

[0012] In some embodiments of the present utility model, both the first flow channel and the second flow channel extend along the length direction of the manifold. The first throttle hole is provided at the part of the manifold between the first flow channel and the second flow channel. A through-hole is provided at the part of the manifold between the second flow channel and the peripheral wall of the manifold. The manifold includes a pipe body and an input pipe. The first flow channel, the second flow channel, the input channel, and the plurality of third flow channels are provided in the pipe body. The input channel is formed in the input pipe. The input pipe passes through the through-hole and abuts against the wall surface of the second flow channel. The input pipe is communicated with the first rectifying cavity through the first throttle hole.

[0013] In some embodiments of the present utility model, the heat exchanger further includes a partition plate. The second throttle hole is provided on the partition plate. The partition plate is arranged in the first flow channel and divides the first flow channel into the first rectifying cavity and the flow dividing cavity.

[0014] In some embodiments of the present utility model, both the first flow channel and the second flow channel penetrate through the manifold. The heat exchanger further includes a first plugging member and a second plugging member. The first plugging member is used to plug the first axial end of the first flow channel and the second flow channel, and the second plugging member is used to plug the second axial end of the first flow channel and the second flow channel. The part of the manifold located between the first flow channel and the second flow channel is provided with a first communication hole and a second communication hole. Along the length direction of the manifold, the two ends of the first flow channel are respectively communicated with the second flow channel through the first communication hole and the second communication hole. Both the first communication hole and the second communication hole are located between the first plugging member and the second plugging member.

[0015] In some embodiments of the present utility model, the part of the manifold located between the first flow channel and the second flow channel is further provided with a first insertion hole, the part of the manifold located between the second rectifying cavity and the second flow channel is further provided with a second insertion hole, and the part of the manifold located between the second flow channel and the peripheral wall of the manifold is further provided with a third insertion hole and a fourth insertion hole. Along the length direction of the manifold, both the first communication hole and the second communication hole are located between the first insertion hole and the second insertion hole, and the through-hole is located between the third insertion hole and the fourth insertion hole. The first plugging member is sequentially inserted into the first insertion hole and the third insertion hole, and the second plugging member is sequentially inserted into the second insertion hole and the fourth insertion hole.

[0016] In some embodiments of the present utility model, the part of the manifold located between the second flow channel and the peripheral wall of the manifold is further provided with two reserved holes. The position of one of the reserved holes corresponds to that of the first communication hole, and the position of the other reserved hole corresponds to that of the second communication hole. The heat exchanger further includes two plugs respectively plugged in the two reserved holes.

[0017] In some embodiments of the present utility model, the area of the flow cross-section of the first rectifying cavity is equal to the area of the flow cross-section of the shunt cavity.

[0018] In some embodiments of the present utility model, on the side of the manifold where the third flow channel is provided, there is also an installation groove, which extends along the length direction of the manifold. The heat exchanger further includes a partition assembly disposed in the installation groove. The partition assembly has a plurality of partition portions spaced along the length direction of the manifold. The heat exchanger further includes a plate assembly fastened to the installation groove. The plate assembly is provided with a plurality of third communication holes spaced along the length direction of the manifold. Between two adjacent partition portions, the groove wall of the installation groove, and the plate assembly, a second rectification cavity is defined. Along the length direction of the manifold, the positions of the plurality of third communication holes correspond one-to-one with the positions of the plurality of third flow channels and are connected through the second rectification cavity. The heat exchange tubes are inserted into the third communication holes and communicate with the second rectification cavity.

[0019] In some embodiments of the present utility model, the flow cross-section of the second flow channel is greater than or equal to the flow cross-section of the first flow channel.

[0020] In some embodiments of the present utility model, the manifold is a profile member.

[0021] A second aspect of the present utility model provides a heating and ventilation device, including the heat exchanger proposed in the first aspect of the present utility model.

[0022] The heating and ventilation device proposed in the second aspect of the present utility model has the same beneficial effects as the heat exchanger proposed in the first aspect of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0024] Figure 1 Schematically shown is a schematic structural diagram of the first perspective of the manifold (assembled with the partition assembly and the plate assembly) according to the first embodiment of the present utility model;

[0025] Figure 2 Schematically shown is a schematic structural diagram of the second perspective of the manifold (assembled with the partition assembly and the plate assembly) according to the first embodiment of the present utility model;

[0026] Figure 3 Schematically shown is a schematic structural diagram of the plate assembly according to the first embodiment of the present utility model;

[0027] Figure 4Schematically shown is a schematic structural view of a partition assembly according to a first embodiment of the present utility model;

[0028] Figure 5 Schematically shown is a schematic structural view of a header pipe from a third perspective according to a first embodiment of the present utility model;

[0029] Figure 6 Schematically shown is a schematic cross-sectional structural view of a header pipe (assembling a partition assembly and a plate assembly) according to a first embodiment of the present utility model;

[0030] The reference signs in the drawings are shown as follows:

[0031] 100, header pipe; 101, heat exchange pipe;

[0032] 10, first flow channel; 101, first rectifying cavity; 102, shunt cavity; 11, second flow channel; 12, third flow channel; 13, first communication hole; 14, second communication hole; 15, third communication hole; 16, first throttling hole; 17, through hole; 18, partition board; 181, second throttling hole;

[0033] 20, first insertion hole; 21, second insertion hole; 22, third insertion hole; 23, fourth insertion hole; 24, first plugging member; 25, second plugging member;

[0034] 30, input channel; 31, input pipe;

[0035] 40, reserved hole; 41, plug;

[0036] 50, installation groove; 51, partition assembly; 511, partition part; 512, connection part; 52, second rectifying cavity; 53, plate assembly. Detailed implementation manners

[0037] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0038] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. Method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be used.

[0039] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be termed a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0040] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0041] As Figures 1 to 6 shown, Figure 6A in the middle represents the length direction of the manifold 100. The first aspect of the utility model provides a heat exchanger, including a manifold 100 and a plurality of heat exchange tubes 101. The plurality of heat exchange tubes 101 are arranged in parallel, and a first flow channel 10, a second flow channel 11, an input channel 30 and a plurality of third flow channels 12 are formed in the manifold 100. The first flow channel 10 includes a first rectifying cavity 101 and a diverting cavity 102 which are coaxially connected. The plurality of third flow channels 12 are arranged at intervals along the axial direction of the diverting cavity 102. The diverting cavity 102 is connected to the heat exchange tube 101 through the third flow channel 12. The axial ends of the second flow channel 11 are respectively connected to the axial ends of the diverting cavity 102. The input channel 30 is connected to the diverting cavity 102 through the first rectifying cavity 101. The input channel 30 is used to supply external fluid to flow into the first rectifying cavity 101. The first rectifying cavity 101 is used to rectify the fluid from the input channel 30.

[0042] It can be understood that the manifold 100 can be an integrated structure, such as a profile, or a combined structure, and the manifold 100 is a long tube structure. By processing the first flow channel 10 and the second flow channel 11 in the manifold 100, the first flow channel 10 can be divided into a diverter chamber 102 and a rectifying chamber, and the diverter chamber 102 and the second flow channel 11 are connected end to end to form a circulation loop, so that the fluid at the top of the diverter chamber 102 flows back to the bottom of the diverter chamber 102 through the second flow channel 11, reducing the fluid retention at the bottom of the first flow channel 10 and improving the heat exchange effect. On the other side of the manifold 100, a plurality of third flow channels 12 are arranged at intervals along the length direction of the manifold 100, one end of the third flow channel 12 is connected to the diverter chamber 102, and the other end of the third flow channel 12 is plugged into the heat exchange tube 101. A plurality of heat exchange tubes 101 are arranged in parallel for heat exchange of fluids. The input channel 30 is arranged at the bottom of the manifold 100, and the input channel 30 can extend along the width direction of the manifold 100. The outlet of the input channel 30 is connected with the rectifying cavity, so that the fluid from the input channel 30 is first rectified by the rectifying cavity, and then flows more evenly, and then flows into the diversion cavity 102. Specifically, the rectifying cavity can be defined by grooving in the manifold 100 and using part of the first flow channel 10 and the second flow channel 11 to set a plate, and the input channel 30 can be realized by inserting a pipe into the manifold 100, or it can be defined by the internal opening of the integrally formed manifold 100.

[0043] The heat exchanger proposed by the present utility model introduces the external fluid to be heat-exchanged into the first flow channel 10 through the input pipe 31, and then distributes it to a plurality of heat exchange pipes 101 connected in parallel through a plurality of third flow channels 12. The heat exchanger is also provided with a second flow channel 11 that forms a circulation loop with the first flow channel 10. The second flow channel 11 can redirect the fluid in the first flow channel 10 back to the first flow channel 10, improving the fluid retention phenomenon in the first flow channel 10 and further improving the heat exchange performance of the heat exchanger. Moreover, the first flow channel 10 also has a first rectifying cavity 101, which can rectify the fluid output from the input pipe 31, making the fluid flow more uniformly, and thus improving the heat exchange effect of the heat exchanger.

[0044] In some embodiments of the present utility model, a first throttle hole 16 is provided at the connection between the input channel 30 and the first rectifying cavity 101, and the input channel 30 is connected to the first rectifying cavity 101 through the first throttle hole 16.

[0045] It can be understood that the first throttle hole 16 can be provided on the manifold 100, that is, the first throttle hole 16 is provided on the part of the manifold 100 at the outlet of the input channel 30, or an end plate is provided at the end of the input pipe 31, and the first throttle hole 16 is formed on the end plate. The first throttle hole 16 can throttle the fluid flowing out of the input channel 30, improving the flow efficiency. Specifically, the first throttle hole 16 can be circular or rectangular.

[0046] In some embodiments of the present utility model, a second throttle hole 181 is provided at the connection between the first rectifying cavity 101 and the flow dividing cavity 102, and the first rectifying cavity 101 is connected to the first flow channel 10 through the second throttle hole 181.

[0047] It can be understood that the second throttle hole 181 can be provided on the manifold 100, that is, the first throttle hole 16 is provided on the part of the manifold 100 between the first rectifying cavity 101 and the flow dividing cavity 102. The second throttle hole 181 can throttle the fluid rectified by the first rectifying cavity 101, increasing the velocity of the fluid flowing into the flow dividing cavity 102, reducing the fluid retention phenomenon at the end of the flow dividing cavity 102, and thus improving the heat exchange efficiency. Specifically, the second throttle hole 181 can be circular or rectangular.

[0048] In some embodiments of the present utility model, both the first flow channel 10 and the second flow channel 11 extend along the length direction of the manifold 100. A first throttle hole 16 is provided in the part of the manifold 100 located between the first flow channel 10 and the second flow channel 11. A through-hole 17 is provided in the part of the manifold 100 located between the second flow channel 11 and the peripheral wall of the manifold 100. The manifold 100 includes a pipe body and an input pipe 31. The first flow channel 10, the second flow channel 11, an input channel 30, and a plurality of third flow channels 12 are provided in the pipe body. The input channel 30 is formed in the input pipe 31. The input pipe 31 passes through the through-hole 17 and abuts against the wall surface of the second flow channel 11. The input pipe 31 communicates with the first rectification cavity 101 through the first throttle hole 16.

[0049] It can be understood that the fluid can be input through the input pipe 31. The input pipe 31 is horizontally inserted into the second flow channel 11 from the through-hole 17 and abuts against the part of the manifold 100 located between the second flow channel 11 and the first flow channel 10. The first throttle hole 16 is also provided in this part. The first throttle hole 16 can throttle the fluid flowing out of the input pipe 31, improve the flow efficiency, and further improve the heat exchange efficiency. After the input pipe 31 abuts against the wall surface of the second flow channel 11, the orifice of the input pipe 31 is sealed by the wall surface, so that the fluid flows from the first throttle hole 16 to the first rectification cavity 101 for rectification.

[0050] In some embodiments of the present utility model, the heat exchanger further includes a partition plate 18. A second throttle hole 181 is provided on the partition plate 18. The partition plate 18 is arranged in the first flow channel 10. The partition plate 18 divides the first flow channel 10 into a first rectification cavity 101 and a diversion cavity 102.

[0051] It can be understood that the first flow channel 10 can be divided into a first rectification cavity 101 and a diversion cavity 102 by the partition plate 18. The diversion cavity 102 is the main part of the first flow channel 10 and is used for collecting and diverting the fluid to the third flow channels 12. The first rectification cavity 101 is defined by the partition plate 18, the side wall of the first flow channel 10, and the second sealing member 25. It is used for rectifying the input fluid to improve the uniformity of the fluid flow, and further make the fluid flowing into the diversion cavity 102 flow more uniformly, thereby improving the heat exchange efficiency.

[0052] In some embodiments of the present utility model, both the first flow channel 10 and the second flow channel 11 penetrate through the manifold 100. The heat exchanger further includes a first plugging member 24 and a second plugging member 25. The first plugging member 24 is used to plug the first axial end of the first flow channel 10 and the second flow channel 11, and the second plugging member 25 is used to plug the second axial end of the first flow channel 10 and the second flow channel 11. The portion of the manifold 100 located between the first flow channel 10 and the second flow channel 11 is provided with a first communication hole 13 and a second communication hole 14. Along the length direction of the manifold 100, the two ends of the first flow channel 10 are respectively communicated with the second flow channel 11 through the first communication hole 13 and the second communication hole 14. Both the first communication hole 13 and the second communication hole 14 are located between the first plugging member 24 and the second plugging member 25.

[0053] It can be understood that the manifold 100 can be an integral structure, such as a profile, and the manifold 100 has a long tube structure. By processing the first flow channel 10 and the second flow channel 11 that penetrate along the length direction on the profile member, the first plugging member 24 and the second plugging member 25 can be of a plate structure and are inserted transversely into the manifold 100 along the radial direction of the manifold 100 to plug the two ends of the first flow channel 10 and the second flow channel 11, forming a closed flow channel and reducing the fluid leakage phenomenon. The first plugging member 24 and the second plugging member 25 can also be structures having two plugging blocks 41, and the two ends of the first flow channel 10 and the second flow channel 11 that penetrate through the manifold 100 axially are plugged by inserting the plugging blocks 41.

[0054] In some embodiments of the present utility model, the portion of the manifold 100 located between the first flow channel 10 and the second flow channel 11 is further provided with a first insertion hole 20 and a second insertion hole 21. The portion of the manifold 100 located between the second flow channel 11 and the peripheral wall of the manifold 100 is further provided with a third insertion hole 22 and a fourth insertion hole 23. Along the length direction of the manifold 100, both the first communication hole 13 and the second communication hole 14 are located between the first insertion hole 20 and the second insertion hole 21, and the through hole 17 is located between the third insertion hole 22 and the fourth insertion hole 23. The first plugging member 24 is sequentially inserted into the first insertion hole 20 and the third insertion hole 22, and the second plugging member 25 is sequentially inserted into the second insertion hole 21 and the fourth insertion hole 23.

[0055] It can be understood that the second through-hole 17 is located between the second communication hole 14 and the second insertion hole 21, and the third through-hole 17 is located between the third insertion hole 22 and the fourth insertion hole 23. The first insertion hole 20 and the third insertion hole 22 can be long-hole structures to match the plate-shaped structure of the first sealing member 24 to improve the sealing effect. Correspondingly, the second insertion hole 21 and the fourth insertion hole 23 can be long-hole structures to match the plate-shaped structure of the second sealing member 25 to improve the sealing effect. After the input pipe 31 is inserted into the first through-hole 17 and the second through-hole 17, it is located in the first flow channel 10 and the second flow channel 11. The second sealing member 25 can seal the output end of the input pipe 31 in the first flow channel 10 and block the axial second end of the second flow channel 11 to prevent fluid leakage.

[0056] In some embodiments of the present invention, two reserved holes 40 are further provided in the part between the second flow channel 11 and the peripheral wall of the manifold 100. The second flow channel 11 communicates with the outside through the reserved holes 40. Along the length direction of the manifold 100, the positions of the two reserved holes 40 respectively correspond to the positions of the first communication hole 13 and the second communication hole 14. The heat exchanger further includes two plugs 41 plugged in the two reserved holes 40 respectively.

[0057] It can be understood that the reserved holes 40 are opened on the side wall of the manifold 100 and communicate with the second flow channel 11. The positions of the two reserved holes 40 in the length direction of the manifold 100 respectively correspond to the positions of the first communication hole 13 and the second communication hole 14, and the aperture of the reserved holes 40 is greater than or equal to the apertures of the first communication hole 13 and the second communication hole 14. When machining the first communication hole 13 and the second communication hole 14, two reserved holes 40 can be machined on the side wall of the manifold 100 first, and then extend into the interior of the manifold 100 to machine the first communication hole 13 and the second communication hole 14, which improves the convenience during machining. Specifically, the shape of the reserved holes 40 can be circular or rectangular or oval. Correspondingly, the shapes of the first communication hole 13 and the second communication hole 14 can also be circular or rectangular or oval, or other shapes suitable for fluid flow. The shape of the plug 41 is adapted to the reserved holes 40, so that after the plug 41 is inserted into the reserved holes 40, the reserved holes 40 are blocked to prevent fluid leakage.

[0058] In some embodiments of the present invention, along the width direction of the manifold 100, the flow cross-section of the first rectifying cavity 101 is equal to the flow cross-section of the flow dividing cavity 102.

[0059] It can be understood that the flow-through cross-section refers to the cross-section through which the fluid flows in the flow channel, that is, the radial cross-section of the flow channel. The flow-through cross-sections of the first rectifying cavity 101 and the flow dividing cavity 102 can be circular, rectangular, semi-circular or arc-shaped, and the flow-through cross-section of the first rectifying cavity 101 is equal to that of the flow dividing cavity 102. During processing, the first rectifying cavity 101 and the flow dividing cavity 102 can be processed together to reduce costs. The second throttle hole 181 on the partition plate 18 between the first rectifying cavity 101 and the flow dividing cavity 102 plays a throttling role, which can increase the flow velocity of the fluid rectified by the first rectifying cavity 101 entering the flow dividing cavity 102, improve the flow efficiency of the manifold 100, and further improve the heat exchange efficiency of the heat exchanger.

[0060] In some embodiments of the present utility model, on the side of the manifold 100 where the third flow channel 12 is provided, there is also an installation groove 50. The installation groove 50 extends along the length direction of the manifold 100. The heat exchanger further includes a partition component 51 disposed in the installation groove 50. The partition component 51 has a plurality of partition portions 511 spaced along the length direction of the manifold 100. The heat exchanger further includes a plate component 53 buckled on the installation groove 50. The plate component 53 is provided with a plurality of third communication holes 15 spaced along the length direction of the manifold 100. A second rectifying cavity 52 is defined between two adjacent partition portions 511, the groove wall of the installation groove 50, and the plate component 53. Along the length direction of the manifold 100, the positions of the plurality of third communication holes 15 correspond to the positions of the plurality of third flow channels 12. A second rectifying cavity 52 is communicated between a corresponding third communication hole 15 and a third flow channel 12. The heat exchange tube 101 is inserted into the third communication hole 15 and communicated with the second rectifying cavity 52.

[0061] It can be understood that to further improve the heat exchange efficiency and effect, a plurality of second rectifying cavities 52 and matching throttle holes can be provided between the manifold 100 and the heat exchange tube 101. An installation groove 50 can be opened on one side of the manifold 100. The installation groove 50 is defined by the main body of the manifold 100 and two side plates. A plurality of second rectifying cavities 52 spaced along the length direction of the manifold 100 are separated in the installation groove 50 by arranging a partition component 51. The partition component 51 can be integrally formed with the rectifying tube. For example, a plurality of partition portions 511 are cut out on one side of the manifold 100, or are independently provided. For example, the plurality of partition portions 511 are connected and fixed through a connecting portion 512 and then installed in the installation groove 50. The installation groove 50 is sealed by a plate component 53. The plate component 53 can be a plate with a plurality of third communication holes 15 opened. The third communication holes 15 are used for inserting the heat exchange tube 101. The fluid from the first flow channel 10 enters the second rectifying cavity 52 through the third flow channel 12 for rectification and then enters the heat exchange tube 101 through the third communication hole 15. Specifically, the third flow channel 12 and the third communication hole 15 can be set as a throttle hole type structure to improve the flow efficiency. In addition, the second rectifying cavity 52 can be a cubic or cylindrical structure.

[0062] In some embodiments of the present utility model, along the width direction of the header pipe 100, the flow-through cross-section of the second flow channel 11 is greater than or equal to the flow-through cross-section of the first flow channel 10.

[0063] It can be understood that the flow-through cross-section refers to the cross-section through which the fluid flows in the flow channel, that is, the radial cross-section of the flow channel. The flow-through cross-section of the second flow channel 11 can be circular, rectangular or semi-circular. The cross-sectional area of the second flow channel 11 is larger than the cross-sectional area of the first flow channel 10, so that the pressure drop of the second flow channel 11 is less than the pressure drop of the first flow channel 10, ensuring that the fluid can circulate in the first flow channel 10 and the second flow channel 11, reducing the fluid retention phenomenon at the bottom of the first flow channel 10, and improving the heat exchange efficiency.

[0064] In some embodiments of the present utility model, the header pipe 100 is a profile member. The profile member can be an aluminum profile, and structures such as the first flow channel 10, the second flow channel 11 and the third flow channel 12 are formed by drilling holes in the profile member. The profile member is convenient for obtaining materials and processing, and can reduce the cost of the heat collecting pipe.

[0065] The second aspect of the present utility model provides a heating, ventilation and air conditioning (HVAC) device, including the heat exchanger provided in the first aspect of the present utility model.

[0066] The HVAC device provided in the second aspect of the present utility model has the same beneficial effects as the heat exchanger provided in the first aspect of the present utility model. The HVAC device can be an air conditioner, and the heat exchanger can be the heat exchanger of the indoor unit of the air conditioner. The refrigerant heats up and evaporates in the heat exchanger, and the fan blows the low-temperature air generated by the refrigerant into the room for refrigeration.

[0067] The above is only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A heat exchanger, characterized in that: include: A plurality of heat exchange tubes arranged in parallel; A collecting pipe, wherein a first flow channel, a second flow channel, an input channel and a plurality of third flow channels are formed in the collecting pipe, the first flow channel includes a first rectifying chamber and a diverting chamber, the plurality of third flow channels are arranged at intervals along the axial direction of the diverting chamber, the diverting chamber is connected with the heat exchange tube through the third flow channel, the axial ends of the second flow channel are respectively connected with the axial ends of the diverting chamber, the input channel is connected with the diverting chamber through the first rectifying chamber, the input channel is used for external fluid to flow into the first rectifying chamber, and the first rectifying chamber is used for rectifying the fluid from the input channel.

2. The heat exchanger according to claim 1, characterized in that: A first throttling hole is provided at the connection between the input channel and the first rectifying cavity, and the input channel is connected with the first rectifying cavity through the first throttling hole.

3. The heat exchanger according to claim 1, characterized in that: A second throttling hole is provided at the connection between the first rectifying cavity and the diverting cavity, and the first rectifying cavity is communicated with the first flow channel through the second throttling hole.

4. The heat exchanger according to claim 2, characterized in that: The first flow channel and the second flow channel both extend along the length direction of the collecting pipe, the portion of the collecting pipe located between the first flow channel and the second flow channel is provided with the first throttling hole, the portion of the collecting pipe located between the second flow channel and the peripheral wall of the collecting pipe is provided with a through hole, the collecting pipe comprises a pipe body and an input pipe, the pipe body is provided with the first flow channel, the second flow channel, the input channel and the plurality of third flow channels, the input channel is formed in the input pipe, the input pipe is penetrated through the through hole, and the input pipe abuts against the wall surface of the second flow channel, and the input pipe is connected with the first rectifying chamber through the first throttling hole.

5. The heat exchanger according to claim 3, characterized in that: The heat exchanger further includes a partition, on which the second throttling hole is provided. The partition is disposed in the first flow channel, and the partition divides the first flow channel into the first rectifying chamber and the diverting chamber.

6. The heat exchanger according to claim 4, characterized in that The first flow channel and the second flow channel both pass through the collecting pipe, and the heat exchanger also includes a first sealing member and a second sealing member, the first sealing member is used to seal the axial first end of the first flow channel and the second flow channel, and the second sealing member is used to seal the axial second end of the first flow channel and the second flow channel. The portion of the collecting pipe located between the first flow channel and the second flow channel is provided with a first connecting hole and a second connecting hole, and along the length direction of the collecting pipe, the two ends of the first flow channel are connected to the second flow channel through the first connecting hole and the second connecting hole respectively, and the first connecting hole and the second connecting hole are both located between the first sealing member and the second sealing member.

7. The heat exchanger according to claim 6, characterized in that The portion of the collecting pipe located between the first flow channel and the second flow channel is also provided with a first plug hole and a second plug hole, and the portion of the collecting pipe located between the second flow channel and the peripheral wall of the collecting pipe is also provided with a third plug hole and a fourth plug hole. Along the length direction of the collecting pipe, the first connecting hole and the second connecting hole are both located between the first plug hole and the second plug hole, and the through hole is located between the third plug hole and the fourth plug hole. The first blocking piece is sequentially connected to the first plug hole and the third plug hole, and the second blocking piece is sequentially connected to the second plug hole and the fourth plug hole.

8. The heat exchanger according to claim 6, characterized in that The portion of the collecting pipe located between the second flow channel and the peripheral wall of the collecting pipe is also provided with two reserved holes, wherein the position of one of the reserved holes corresponds to the first connecting hole, and the position of the other reserved hole corresponds to the position of the second connecting hole, and the heat exchanger also includes two plugs respectively plugging the two reserved holes.

9. The heat exchanger according to any one of claims 1 to 8, characterized in that: The flow cross section area of ​​the first rectifying cavity is equal to the flow cross section area of ​​the diverting cavity.

10. The heat exchanger according to any one of claims 1 to 8, characterized in that: The collecting tube is provided with a mounting groove on one side of the third flow channel, and the mounting groove extends along the length direction of the collecting tube. The heat exchanger also includes a partition assembly arranged in the mounting groove, and the partition assembly has a plurality of partition parts arranged at intervals along the length direction of the collecting tube. The heat exchanger also includes a plate assembly snapped on the mounting groove, and the plate assembly is provided with a plurality of third connecting holes arranged at intervals along the length direction of the collecting tube. A second rectifying cavity is defined between two adjacent partition parts, the groove wall of the mounting groove and the plate assembly. Along the length direction of the collecting tube, the positions of the plurality of third connecting holes correspond one by one to the positions of the plurality of third flow channels, and are connected through the second rectifying cavity. The heat exchange tube is inserted into the third connecting hole and connected to the second rectifying cavity.

11. The heat exchanger according to any one of claims 1 to 8, characterized in that: A flow cross section of the second flow channel is greater than or equal to a flow cross section of the first flow channel.

12. The heat exchanger according to any one of claims 1 to 8, characterized in that: The collecting pipe is a profile piece.

13. A HVAC equipment, characterized in that: A heat exchanger comprising any one of claims 1 to 12.

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