Header group and heat exchanger

Abstract

The present application generally relates to the technical field of air conditioners, and specifically, to a manifold group and a heat exchanger. The manifold group is installed on the heat exchanger. The manifold group includes a manifold and a connecting pipe. The manifold is provided with a plurality of flat tube grooves. The flat tubes are connected to the manifold through the flat tube grooves. The connecting pipe has a guide section for extending into the manifold. The guide section is provided with a liquid outlet structure and a liquid return structure. The liquid outlet structure is used to spray liquid refrigerant in a mist form, so that the refrigerant enters the flat tube in a mist form for heat exchange, thereby improving the heat exchange efficiency of the refrigerant. The liquid return structure is used to allow the liquid refrigerant accumulated in the manifold to enter the guide section and be sprayed out again from the spray hole, so as to form a self-circulating structure in the manifold, reduce the accumulation of refrigerant in the manifold, improve the flow distribution of the refrigerant entering each flat tube, improve the heat exchange efficiency of the refrigerant, and improve the performance of the heat exchanger.

Description

Technical Field

[0001] The present application generally relates to the technical field of air conditioners, and in particular to a header group and a heat exchanger. Background Art

[0002] In the prior art, the microchannel heat exchanger consists of flat tubes, fins connected between the flat tubes, and two collecting pipes connected to the two ends of the flat tubes. The microchannel flow heat exchanger has high heat exchange efficiency, compact structure, and cost advantages over ordinary copper tube fin heat exchangers. It has been widely used as a single cooler condenser in household and commercial air conditioners.

[0003] When the heat exchanger is used as an evaporator, the refrigerant in the gas-liquid two-phase state will experience a certain degree of gas-liquid stratification, resulting in uneven distribution of the refrigerant flow entering each flat tube. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to solve the technical problem of large flow differences between refrigerant entering each flat tube from a header, the main purpose of this application is to improve the distribution of refrigerant flow entering the flat tubes, improve the performance of the heat exchanger, and provide a header group and a heat exchanger.

[0006] In order to achieve the above invention objectives, this application adopts the following technical solutions:

[0007] A header group, comprising a header and a connecting pipe for conveying a refrigerant to the header, wherein the header is provided with a plurality of flat tube grooves, and the connecting pipe has a guide section for extending into the header;

[0008] The guide section is provided with a liquid outlet structure and a liquid return structure, and the liquid return structure is used for the liquid refrigerant accumulated in the header to flow into the guide section, so as to form a self-circulation structure in the header.

[0009] Furthermore, in some embodiments of the present solution, the liquid return structure includes a liquid return hole opened in the guide section and a blocking member arranged inside the guide section;

[0010] The blocking member is located on a side of the liquid return hole toward a direction in which the refrigerant flows into the manifold, so as to reduce the pressure inside the liquid return hole.

[0011] Furthermore, in some embodiments of the present solution, the orientation of the liquid return hole is perpendicular to the direction in which the refrigerant in the manifold flows through the liquid return hole.

[0012] Furthermore, in some embodiments of the present solution, the liquid outlet structure includes a plurality of spray holes opened in the guide section, and the plurality of spray holes form a shower structure.

[0013] Furthermore, in some embodiments of the present solution, the spray holes are oriented toward the axial direction of the collecting pipe.

[0014] Furthermore, in some embodiments of the present solution, the connecting pipe extends into the collecting pipe from the radial direction of the collecting pipe, and the guide section is provided with a bending structure so that the guide section is axially extended in the collecting pipe.

[0015] Furthermore, in some embodiments of the present solution, the flow guide section has a first straight tube portion extending along the axial direction of the header and a second straight tube portion extending along the radial direction of the header;

[0016] The liquid outlet structure is arranged at an end of the first straight tube portion away from the second straight tube portion, and the liquid return structure is arranged at the second straight tube portion.

[0017] Furthermore, in some embodiments of the present solution, the collecting pipe has a plurality of tube cavities that are separated from each other, each tube cavity is provided with a plurality of the flat tube grooves, and each of the tube cavities is connected to the connecting pipe.

[0018] Furthermore, in some embodiments of the present solution, the connecting tube radially extends from the peripheral side of the bottom of the lumen, and the guide section axially extends toward the top of the lumen.

[0019] A heat exchanger is provided with the above-mentioned collecting tube group.

[0020] It can be seen from the above technical solution that the advantages and positive effects of the header group and heat exchanger of the present application are:

[0021] Improve the flow distribution of refrigerant entering each flat tube, reduce the accumulation of refrigerant in the collecting pipe, improve the heat exchange efficiency of the refrigerant, and improve the performance of the heat exchanger.

[0022] The collecting pipe group includes a collecting pipe and a connecting pipe. The collecting pipe is provided with a plurality of flat pipe grooves. The connecting pipe has a guide section for extending into the collecting pipe. The guide section is provided with a liquid outlet structure and a liquid return structure. The liquid return structure forms a negative pressure zone in the guide section. The pressure in the collecting pipe is greater than the pressure in the negative pressure zone, so that the liquid refrigerant deposited in the collecting pipe enters the guide section through the liquid return structure, and then is sprayed out from the liquid outlet structure again to form a self-circulating structure in the collecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 is a schematic structural diagram of a heat exchanger according to an exemplary embodiment.

[0026] Figure 2 A heat exchanger according to an exemplary embodiment is shown Figure 1 A partial enlarged schematic diagram.

[0027] Figure 3 The figure is a schematic diagram of a cross-sectional structure of a connecting pipe of a header group according to an exemplary embodiment.

[0028] Figure 4 The figure is a schematic diagram of a top view structure of a connecting pipe of a header according to an exemplary embodiment.

[0029] The reference numerals are described as follows:

[0030] 100-collecting pipe; 200-connecting pipe; 300-gas collecting pipe; 400-flat pipe;

[0031] 110- diaphragm; 120- lumen;

[0032] 210- flow guide section; 220- installation section;

[0033] 211 - spray hole; 212 - liquid return hole; 213 - blocking member; 214 - first straight pipe portion; 215 - second straight pipe portion. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The present invention provides a manifold group and a heat exchanger. The manifold group is installed on the heat exchanger. The manifold group includes a manifold 100 and a connecting pipe 200. The manifold 100 is provided with a plurality of flat tube 400 grooves. The flat tube 400 is connected with the manifold 100 through the flat tube 400 grooves. The connecting pipe 200 has a guide section 210 for extending into the manifold 100. The guide section 210 is provided with a liquid outlet structure and a liquid return structure. The liquid outlet structure is used to spray the liquid refrigerant in a mist form, so that the refrigerant is sprayed in a mist form. The refrigerant enters the flat tube 400 for heat exchange, thereby improving the heat exchange efficiency of the refrigerant. The return liquid structure forms a negative pressure area in the guide section. The pressure in the collecting pipe is greater than the pressure in the negative pressure area, so that the liquid refrigerant deposited in the collecting pipe enters the guide section through the return liquid structure, and then is ejected from the liquid outlet structure again to form a self-circulation structure in the collecting pipe, thereby reducing the accumulation of refrigerant in the collecting pipe 100, improving the flow distribution of the refrigerant entering each flat tube 400, improving the heat exchange efficiency of the refrigerant, and improving the performance of the heat exchanger.

[0036] Combination Figure 2-3 As shown, the manifold group includes a manifold 100 and a connecting pipe 200. The manifold 100 is provided with a flat tube 400 groove for connecting the flat tube 400. The connecting pipe 200 has a guide section 210 and a mounting section 220. When installed, the guide section 210 extends into the manifold 100, and the mounting section 220 is located outside the manifold. The mounting section 220 is connected to the compressor through a pipeline. The guide section 210 is provided with a liquid outlet structure and a liquid return structure. The liquid outlet structure is used to spray the liquid refrigerant in a mist form, and the return structure is used for the liquid refrigerant accumulated in the manifold 100 to flow into the guide section 210, thereby reducing the accumulation of liquid refrigerant in the manifold 100. According to the understanding of those skilled in the art, in this solution, the liquid outlet structure can be a shower structure. Combined with the use state of the heat exchanger, the liquid refrigerant is located below the manifold 100 under the action of gravity. Therefore, the liquid outlet structure is relatively arranged above the liquid return structure.

[0037] Based on the above principle, the present solution can also be understood in this way, that is, the installation section 220 of the connecting pipe 200 is eliminated. For example, the manifold 100 has an installation hole, the inner side of the installation hole is connected to the flow guide section 210, and the outer side of the installation hole can be provided with a connecting joint or a similar structure for pipeline connection, so that the manifold 100 is connected to the compressor through the pipeline.

[0038] like Figure 1-3The connecting pipe 200 is in an "L"-shaped structure. The connecting pipe 200 extends from the radial direction of the collecting pipe 100 and is connected to the collecting pipe 100. The guide section 210 of the connecting pipe 200 is provided with a bending structure, so that the guide section 210 extends along the axial direction of the collecting pipe 100. The guide section 210 includes a first straight pipe portion 214 and a second straight pipe portion 215. The first straight pipe portion 214 is extended along the axial direction of the guide pipe, and the second straight pipe portion 215 is extended along the radial direction of the guide pipe. In this embodiment, the liquid outlet structure is arranged at one end of the first straight pipe portion 214 away from the second straight pipe portion 215, and the reflux structure is arranged at the second straight pipe portion 215. The liquid outlet structure includes a plurality of spray holes 211, and the plurality of spray holes 211 form a shower structure. The shower structure can be a round shower, a square shower or other irregularly shaped shower structures, and the spray holes 211 face the axial direction of the collecting pipe 100. The liquid return structure includes a liquid return hole 212 and a blocking member 213. The liquid return hole 212 is opened in the second straight pipe portion 215. The shape of the liquid return hole 212 can be circular, square or an irregular shape that can realize the liquid refrigerant flowing into the guide section 210.

[0039] The direction of the liquid return hole 212 is perpendicular to the direction in which the refrigerant in the manifold 100 flows through the liquid return hole 212. The blocking member 213 is disposed inside the liquid return hole 212. Figure 3 The blocking member 213 is located on the side of the liquid return hole 212 facing the direction of the refrigerant flowing into the manifold 100 to reduce the pressure inside the liquid return hole 212. According to the pressure inside the manifold 100, the liquid refrigerant deposited in the manifold 100 flows from the liquid return hole 212 into the guide section 210. The liquid return hole 212 and the spray hole 211 form a self-circulating structure for the reflux of the liquid refrigerant in the manifold 100, thereby reducing the deposition of the refrigerant in the manifold 100 and improving the flow distribution of the refrigerant entering each flat tube 400.

[0040] In this embodiment, the blocking member 213 is an inclined plate-like structure, and the blocking member 213 extends from one side of the return liquid hole 212 toward the direction in which the refrigerant flows into the collecting pipe 100 to the other side of the return liquid hole 212. The blocking area of ​​the blocking member 213 covers the axial flow area of ​​the return liquid hole 212, thereby ensuring that the liquid refrigerant deposited in the collecting pipe 100 can flow from the return liquid hole 212 into the guide section 210.

[0041] Combination Figure 1The present embodiment also provides a heat exchanger, which includes a header 100, a connecting pipe 200, a gas header 300 and a flat tube 400. A plurality of flat tubes 400 may be provided. The number of slots for the flat tubes 400 provided on the header 100 is the same as the number of the flat tubes 400. The header 100 is connected to one end of the flat tube 400, and the gas header 300 is connected to the other end of the flat tube 400. The header 100 is divided into a plurality of tube cavities 120 by a partition 110, and each tube cavity 120 is connected to a plurality of flat tubes. 400, and each tube cavity 120 is also connected to a connecting pipe 200, the connecting pipe 200 and the flat tube 400 are located on opposite sides of the tube cavity 120, when the heat exchanger is in use, the collecting pipe 100 is placed vertically, the connecting pipe 200 extends into the peripheral side near the bottom of the tube cavity 120, the first straight tube portion 214 of the guide section 210 extends axially toward the top of the tube cavity 120, the spray hole 211 sprays mist refrigerant near the top of the tube cavity 120, and the return liquid hole 212 is close to the bottom of the tube cavity 120.

[0042] When the heat exchanger is cooling, the liquid refrigerant flowing out of the compressor flows into each lumen 120 of the guide tube through the connecting pipe 200. The liquid refrigerant enters the lumen 120 in a mist form after passing through the spray hole 211 and flows into the flat tube 400. Part of the mist refrigerant sinks to the bottom of the lumen 120 due to gravity and settles to form liquid refrigerant. Figure 3 Under the action of the blocking member 213, the pressure in the peripheral area of ​​the return hole 212 decreases, and the liquid refrigerant enters the guide section 210 from the return hole 212, flows to the spray hole 211 in the guide section 210 and sprays out again. The guide section 210 in a cavity forms a self-circulating structure, and the refrigerant will form a spraying cycle after deposition, thereby reducing the deposition of the refrigerant in the manifold 100 and avoiding the uneven flow distribution caused by the gas-liquid stratification phenomenon of the refrigerant. When the heat exchanger is heating, the gaseous refrigerant enters each flat tube 400 from the manifold 300, and then heat exchanges and condenses in the flat tube 400. The refrigerant in a gas-liquid mixed state flows from the flat tube 400 into each tube cavity 120, and the refrigerant enters the connecting tube 200 from the return hole 212 and the spray hole 211 respectively, and flows out from the connecting tube 200.

[0043] In summary, the present invention provides a header group and a heat exchanger, wherein the header group includes a header 100 and a connecting pipe 200, wherein the header 100 is provided with a plurality of flat tube 400 grooves, wherein the flat tube 400 is connected to the header 100 through the flat tube 400 grooves, and the connecting pipe 200 has a guide section 210 for extending into the header 100, wherein the guide section 210 is provided with a liquid outlet structure and a liquid return structure, wherein the liquid outlet structure is used to spray the liquid refrigerant in a mist form, thereby allowing the refrigerant to The refrigerant enters the flat tube 400 in a mist form for heat exchange, thereby improving the heat exchange efficiency of the refrigerant. The liquid outlet structure is located above the liquid return structure. The liquid return structure is used to allow the liquid refrigerant accumulated in the manifold 100 to enter the guide section 210, thereby allowing the guide section 210 to form a self-circulating structure in the manifold 100, reducing the accumulation of the refrigerant in the manifold 100, improving the flow distribution of the refrigerant entering each flat tube 400, improving the heat exchange efficiency of the refrigerant, and improving the performance of the heat exchanger.

[0044] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A header group, characterized in that: It comprises a header (100) and a connecting pipe (200) for conveying refrigerant to the header (100), the header (100) being provided with a plurality of flat tube grooves, and the connecting pipe (200) having a guide section (210) for extending into the header (100); The guide section (210) is provided with a liquid outlet structure and a liquid return structure, and the liquid return structure is used for the liquid refrigerant accumulated in the header (100) to flow into the guide section (210), so as to form a self-circulation structure in the header (100); The liquid return structure comprises a liquid return hole (212) opened in the flow guiding section (210) and a blocking member (213) arranged on the inner side of the flow guiding section (210); The blocking member (213) is located on one side of the liquid return hole (212) in the direction in which the refrigerant flows into the collecting pipe (100), and the blocking member (213) is extended from one side of the liquid return hole (212) in the direction in which the refrigerant flows into the collecting pipe (100) to the other side of the liquid return hole (212). The blocking area of ​​the blocking member (213) covers the axial flow area of ​​the liquid return hole (212) to reduce the pressure inside the liquid return hole (212).

2. The header assembly according to claim 1, characterized in that: The orientation of the liquid return hole (212) is perpendicular to the direction in which the refrigerant in the header (100) flows through the liquid return hole (212).

3. The header assembly according to claim 1, characterized in that: The liquid outlet structure comprises a plurality of spray holes (211) opened in the flow guide section (210), and the plurality of spray holes (211) form a shower structure.

4. The header assembly according to claim 3, characterized in that: The spray holes (211) face the axial direction of the header (100).

5. The header assembly according to claim 1, characterized in that: The connecting pipe (200) extends into the collecting pipe (100) from the radial direction of the collecting pipe (100), and the guide section (210) is provided with a bending structure so that the guide section (210) is axially extended in the collecting pipe (100).

6. The header assembly according to claim 5, characterized in that: The flow guide section (210) comprises a first straight pipe portion (214) extending along the axial direction of the header (100) and a second straight pipe portion (215) extending along the radial direction of the header (100); The liquid outlet structure is arranged at an end of the first straight pipe portion (214) away from the second straight pipe portion (215), and the liquid return structure is arranged at the second straight pipe portion (215).

7. The header assembly according to claim 1, characterized in that: The collecting pipe (100) has a plurality of tube cavities (120) which are arranged separately, each tube cavity (120) is provided with a plurality of the flat tube grooves, and each tube cavity (120) is connected to the connecting pipe (200).

8. The header assembly according to claim 7, characterized in that: The connecting tube (200) radially extends from the peripheral side of the bottom of the tube cavity (120), and the guide section (210) is axially extended toward the top of the tube cavity (120).

9. A heat exchanger, characterized in that: A collecting tube group as described in any one of claims 1 to 8 is installed.

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