Flow dividing assembly and heating and ventilation equipment

Abstract

The utility model provides a shunting assembly and heating and ventilation equipment, the shunting assembly comprises a shell, a plate body and an inlet pipe, an expansion cavity is defined in the shell, the expansion cavity is provided with an opening, the shell is further provided with an inflow hole communicated with the expansion cavity, and the inflow hole is located at one end, deviating from the opening, of the expansion cavity; the plate body is installed on the shell and seals the opening, the plate body is provided with a plurality of flow dividing holes, and the flow dividing holes are communicated with the expansion cavity; one end of the inlet pipe is connected with the shell and communicated with the inflow hole, and the other end of the inlet pipe is used for introducing fluid; the shell and the inlet pipe are of an integrated metal plate structure. The shell and the inlet pipe are integrally formed by a sheet metal part through a sheet metal machining process, and particularly, the shell and the inlet pipe can be manufactured in a mode of extrusion forming of a cylindrical sheet metal part or coiling forming of a sheet metal part in a prefabricated shape, so that the whole structure is few in connecting points, higher in structural strength, higher in production efficiency and free of leakage points, and parts are reduced. And the hidden danger of liquid leakage during use is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of HVAC equipment, in particular to a diversion component and HVAC equipment. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The existing flow diversion assembly of the heat exchanger includes multiple parts such as a cylinder, a joint and a flow diversion orifice plate. It has a complex structure, many parts, low production cost efficiency, and a large leakage risk. Utility Model Content

[0004] The purpose of this utility model is to at least solve the problems of existing HVAC equipment, such as complex structure, low production cost and efficiency, and high leakage risk. This purpose is achieved through the following technical solutions:

[0005] The first aspect of the present invention provides a flow diversion assembly, comprising:

[0006] a shell defining an expansion cavity therein, the expansion cavity having an opening, the shell further comprising an inlet hole, the inlet hole being in communication with the expansion cavity and being located at an end of the expansion cavity away from the opening;

[0007] a plate body, mounted on the shell and closing the opening, the plate body having a plurality of diversion holes, the diversion holes being in communication with the expansion cavity;

[0008] an inlet pipe, one end of which is connected to the housing and communicates with the inlet hole, and the other end of which is used to introduce fluid;

[0009] Wherein, the shell and the inlet pipe are an integrated sheet metal structure.

[0010] The diverter assembly proposed in the first aspect of the present invention utilizes a sheet metal processing process to integrally form the housing and inlet pipe from a single sheet metal component. Specifically, this can be produced by extrusion molding a cylindrical sheet metal component or by roll-forming a prefabricated sheet metal component. This results in a simplified overall structure with fewer connection points, enhanced structural strength, fewer parts, and higher production efficiency. Furthermore, since the housing and inlet pipe are integrally constructed, there are no leak points, reducing the risk of leakage during use.

[0011] In addition, the diversion assembly according to the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, a first lumen and a second lumen are coaxially formed in the inlet tube, the first lumen is connected to the inlet hole through the second lumen, and the flow area of ​​the second lumen is smaller than the flow area of ​​the first lumen.

[0013] In some embodiments of the present invention, the expansion chamber is a rotating body structure, and along the axial direction of the expansion chamber, the cross-section of the expansion chamber is hemispherical, and along the flow direction of the inflow hole, the diameter of the expansion chamber gradually increases.

[0014] In some embodiments of the present invention, a mounting groove is provided at the outer edge of the plate body facing the expansion cavity, the mounting groove is arranged around the axis of the inflow hole, and the end of the shell facing away from the inflow hole is installed in the mounting groove.

[0015] In some embodiments of the present invention, the expansion chamber has an open end that is truncated in a cone shape, and along the flow direction of the inflow hole, the diameter of the expansion chamber has an open end that gradually increases, and the plate body is embedded in the opening and adapted to the shape of the expansion chamber.

[0016] In some embodiments of the present invention, the axial direction of the diverter hole is set at an angle to the axial direction of the inflow hole, and along the flow direction of the diverter hole, the axial direction of the diverter hole is inclined away from the axis of the inflow hole.

[0017] In some embodiments of the present invention, the plate body includes a first plate body and a second plate body arranged opposite to each other, the first plate body is arranged in the expansion cavity, the second plate body is connected to the shell and closes the opening, the first plate body is provided with a plurality of the diversion holes, the second plate body is provided with a plurality of insertion holes, the insertion holes are coaxially arranged with the diversion holes, the insertion holes are larger than the aperture of the diversion holes, the diversion assembly also includes a first connecting pipe, the first end of the first connecting pipe is inserted into the insertion hole and connected to the diversion hole, and the end face of the first end is connected to the plate surface of the second plate body on the side facing away from the expansion cavity.

[0018] In some embodiments of the present invention, the inlet pipe is closed at one end facing away from the shell, and the tube wall of the inlet pipe is provided with a side hole, which is connected to the first tube cavity. The diversion assembly also includes an incoming flow pipe, one end of the incoming flow pipe is connected to the inlet pipe through the side hole, and the other end of the incoming flow pipe is used for fluid inflow, and the axial direction of the incoming flow pipe is tangent to the circumferential direction of the inlet pipe.

[0019] In some embodiments of the present invention, the diversion assembly also includes an incoming flow tube, one end of which is connected to the inlet pipe, and the other end of the incoming flow tube is used for fluid inflow, at least part of the inner wall of the incoming flow tube has a threaded structure, and the threaded structure is constructed to extend spirally along the axial direction of the incoming flow tube.

[0020] In some embodiments of the present invention, at least a portion of the incoming flow pipe is U-shaped, and the incoming flow pipe includes a first straight pipe section, a curved pipe section, and a second straight pipe section connected in sequence, the first straight pipe section and the second straight pipe section are arranged in parallel, and the end of the first straight pipe section away from the curved pipe section is connected to the inlet pipe, and the threaded structure includes a first threaded section and a second threaded section, the first threaded section is arranged on the inner wall of the first straight pipe section, and the second threaded section is arranged on the inner wall of the second straight pipe section.

[0021] In some embodiments of the present invention, the diverter assembly also includes a diverter cone, the large diameter end of the diverter cone is connected to the plate body, the small diameter end of the diverter cone is arranged in the expansion cavity, the diverter cone is coaxially arranged with the inflow hole, and along the axial direction of the inflow hole, the distance between the small diameter end of the diverter cone and the inflow hole is L1, the aperture of the inflow hole is D, and the ratio of L1 to D ranges from 0 to 5.

[0022] The second aspect of the present invention provides a HVAC device, comprising the diversion assembly provided in the first aspect of the present invention.

[0023] The HVAC equipment disclosed in the second aspect of the present invention comprises a diverter assembly with an integrally formed main body. The diverter assembly's housing and inlet pipe are integrally formed from a single sheet metal component through sheet metal processing techniques. Specifically, this can be achieved by extruding a cylindrical sheet metal component or rolling a prefabricated sheet metal component. This results in a structure with fewer connection points, greater structural strength, fewer parts, and higher production efficiency. Furthermore, since the housing and inlet pipe are integrally formed, there are no leak points, reducing the risk of leakage during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0025] Figure 1 Schematically shows a structural diagram of a flow diversion assembly according to an embodiment of the present utility model;

[0026] Figure 2Schematically shows a partial cross-sectional view of a flow diversion assembly according to an embodiment of the present utility model;

[0027] Figure 3 The figure schematically shows the refrigerant flow structure diagram at the connection between the incoming flow pipe and the inlet pipe according to the embodiment of the present utility model;

[0028] Figure 4 Schematically shows a structural diagram of the connection between the incoming flow pipe (with a threaded structure) and the inlet pipe according to an embodiment of the present utility model;

[0029] Figure 5 The following schematically shows a structural diagram of an incoming flow pipe (with a threaded structure) according to an embodiment of the present utility model;

[0030] Figure 6 Schematically shows a cross-sectional structural diagram of a plate body (with the insertion hole and the diversion hole integrated) according to an embodiment of the present utility model;

[0031] Figure 7 Schematically shows a cross-sectional structural diagram of a plate body and a shell (with mounting grooves) according to an embodiment of the present utility model;

[0032] Figure 8 Schematically shows a cross-sectional structural diagram of a plate body and a shell (with a mounting groove and a flange structure) according to an embodiment of the present utility model;

[0033] Figure 9 Schematically shows a cross-sectional structural diagram of a plate body and a shell (the plate body has an inclination angle) according to an embodiment of the present utility model;

[0034] Figure 10 Schematically shows a cross-sectional structural diagram of the first plate and the second plate assembled with the housing according to an embodiment of the present utility model;

[0035] Figure 11 Schematically shows a cross-sectional structural diagram of the assembly of a plate body and a housing (with a mounting groove and a step structure) according to an embodiment of the present utility model;

[0036] Figure 12 Schematically shows a structural diagram of a sheet metal part according to an embodiment of the present utility model;

[0037] Figure 13 Schematically shows a structural diagram of a HVAC device according to an embodiment of the present utility model;

[0038] The reference numerals are as follows:

[0039] 1. HVAC equipment;

[0040] 1000, diversion assembly; 2000, first heat exchanger; 3000, second heat exchanger; 4000, compressor; 5000, refrigeration throttle valve; 6000, four-way valve;

[0041] 10. Shell; 111. Inflow hole; 103. Expansion chamber;

[0042] 20. Plate; 201. Diverter hole; 21. First plate; 22. Second plate; 202. Insertion hole; 24. Flanged structure; 25. Mounting slot;

[0043] 30. Diverter cone;

[0044] 200, first connecting pipe;

[0045] 301, inlet pipe; 3012, reduced diameter structure; 3013, side hole; 3014, first lumen; 3015, second lumen; 3016, transition lumen;

[0046] 302, incoming flow pipe; 3024, threaded structure; 30241, first threaded section; 30242, second threaded section; 3025, first straight pipe section; 3026, curved pipe section; 3027, second straight pipe section; 3028, necking structure.

[0047] 500. Sheet metal; 501. Notch. DETAILED DESCRIPTION

[0048] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0049] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0050] Although the terms first, second, third, etc. can be used in the text 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 can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0051] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative 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 "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0052] like Figures 1 to 13 As shown, Figure 2 Where D1 is the diameter of the first lumen 3014, D2 is the diameter of the incoming flow tube 302, and D3 is the axial length of the first lumen 3014. Figure 4 A in the middle represents the axial direction of the incoming flow pipe 302, Figure 5 Where L is the thread depth, W is the thread width, S is the thread distance, and P is the length of the first thread segment 30241. The first aspect of the utility model proposes a diversion component 1000, including a shell 10, a plate body 20 and an inlet pipe 301. The interior of the shell 10 defines an expansion chamber 103, and the expansion chamber 103 has an opening. The shell 10 is also provided with an inflow hole 111 connected to the expansion chamber 103, and the inflow hole 111 is located at the end of the expansion chamber 103 away from the opening. The plate body 20 is installed on the shell 10 and closes the opening. The plate body 20 has a plurality of diversion holes 201, and the diversion holes 201 are connected to the expansion chamber 103. One end of the inlet pipe 301 is connected to the shell 10 and is connected to the inflow hole 111. The other end of the inlet pipe 301 is used to introduce fluid, wherein the shell 10 and the inlet pipe 301 are an integrated sheet metal structure.

[0053] It can be understood that the shell 10 and the inlet pipe 301 are both cylindrical structures, and a hemispherical, diamond-shaped or conical expansion chamber 103 is defined in the shell 10. One axial end of the expansion chamber 103 is open, and the other axial end is provided with an inflow hole 111. The inflow hole 111 is connected to the inlet pipe 301. The inlet pipe 301 can be coaxially arranged with the inflow hole 111, that is, the inlet pipe 301 is coaxially arranged with the shell 10. The inlet pipe 301 can be a cylindrical straight pipe structure or a straight pipe structure with a reduced diameter at one end, so that the connection between the inlet pipe 301 and the shell 10 is reduced in diameter to form a Venturi-type throat, which can further mix the fluid before entering the throat, and after being guided through the throat, it flows toward the center of the expansion chamber 103, thereby improving the uniformity of the diversion. The shape of the plate body 20 matches the opening and can be a circular plate structure. A plurality of diverter holes 201 are arranged in a circular array on the plate body 20, or a plurality of diverter holes 201 are arranged in a ring-shaped manner and spaced apart. The first connecting pipe 200 can be inserted into the diverter hole 201 to connect with each heat exchange tube of the heat exchanger, or the first connecting pipe 200 can be connected to the plate body 20 by welding. The diverter hole 201 can also be set as a stepped hole structure, or a flange can be set on the plate body 20 to make the connection area between the first connecting pipe 200 and the plate body 20 larger, thereby improving the reliability of the connection. The first connecting pipe 200 can use a stainless steel pipe or other high-rigidity pipe fittings to facilitate connection with the plate body 20 and have better reliability.

[0054] The diverter assembly 1000 proposed in the first aspect of the present invention utilizes a sheet metal processing process to integrally form the housing 10 and inlet pipe 301 from a single sheet metal member 500. Specifically, this can be fabricated by extruding a cylindrical sheet metal member 500 or rolling a prefabricated sheet metal member 500. This results in a simplified overall structure with fewer connection points, enhanced structural strength, fewer parts, and higher production efficiency. Furthermore, since the housing 10 and inlet pipe 301 are integrally constructed, there are no leak points, reducing the risk of leakage during use.

[0055] In some embodiments of the present invention, a coaxially arranged first lumen 3014 and a second lumen 3015 are formed in the inlet tube 301. The first lumen 3014 is connected to the inflow hole 111 through the second lumen 3015. The flow area of ​​the second lumen 3015 is smaller than the flow area of ​​the first lumen 3014.

[0056] It is understandable that the flow area of ​​the first lumen 3014 is greater than the flow area of ​​the second lumen 3015, so that the fluid entering the first lumen 3014 from the flow tube 302 is decelerated and fully mixed in the first lumen 3014, thereby improving the mixing uniformity of the refrigerant when the fluid is a gas-liquid two-phase refrigerant, thereby providing a diversion effect. The flow area of ​​the second lumen 3015 is reduced, so that a throat is formed between the first lumen 3014 and the expansion chamber 103, so that the mixed fluid flows from the second lumen 3015 to the middle of the expansion chamber 103, and is then diverted by the diverter cone 30 in the middle of the expansion chamber 103, thereby improving the diversion effect. Specifically, the first lumen 3014 and the second lumen 3015 can both be cylindrical structures, and a truncated cone transition chamber can be set between the two lumens to avoid sudden changes in flow resistance and improve circulation efficiency.

[0057] In some embodiments of the present invention, the expansion chamber 103 is a rotating body structure, and along the axial direction of the expansion chamber 103 , the cross section of the expansion chamber 103 is hemispherical, and along the flow direction of the inflow hole 111 , the diameter of the expansion chamber 103 gradually increases.

[0058] It is understood that the expansion chamber 103 can be a rotating body structure such as a truncated cone, a cone, or a hemisphere, and can be combined with the diverter holes 201 arranged at intervals along the circumference of the expansion chamber 103, as well as the inflow hole 111 and the diverter cone 30 arranged on the axis of the expansion chamber 103 to make the diversion more uniform. Specifically, the expansion chamber 103 can be hemispherical, having a spherical cavity wall, so that the flow resistance is smaller and the circulation efficiency is better. The inflow hole 111 can be arranged at the top of the sphere of the expansion chamber 103, and the diverter holes 201 are arranged at intervals along the circumference of the expansion chamber 103, and the connecting line of the multiple diverter holes 201 is arranged coaxially with the expansion chamber 103, so that after the fluid flows into the expansion chamber 103 from the inflow hole 111, it can flow evenly to each diverter hole 201, and after the flow rate is adjusted by the diverter hole 201, it flows from the first connecting pipe 200 to the heat exchanger.

[0059] In some embodiments of the present invention, a mounting groove 25 is provided at the outer edge of the plate body 20 facing the expansion cavity 103 . The mounting groove 25 is arranged around the axis of the inflow hole 111 , and the end of the shell 10 facing away from the inflow hole 111 is installed in the mounting groove 25 .

[0060] It can be understood that a mounting groove 25 surrounding the plate body 20 can be provided at the edge of the plate body 20 on one side facing the expansion cavity 103. The mounting groove 25 can be arranged in a ring shape and extend around the axis of the plate body 20, or the mounting groove 25 includes multiple parts, which are arranged at intervals along the circumference of the plate body 20. The shape of the mounting groove 25 matches the open part of the shell 10. The mounting groove 25 can be defined by a first plane that is annular and parallel to the radial direction of the plate body 20 and a second plane that is annular and parallel to the axial direction of the plate body 20. When the plate body 20 is installed, the second plane can be embedded in the expansion cavity 103 and abutted against the cavity wall of the expansion cavity 103. The first plane is then abutted against the end face of the open part of the shell 10 to achieve partial embedding and installation of the plate body 20 in the expansion cavity 103, and the open part of the shell 10 is matched and connected with the mounting groove 25, which further improves the reliability of the connection between the plate body 20 and the shell 10.

[0061] In some embodiments of the present invention, the expansion chamber 103 has an open end that is truncated in a cone shape, and along the flow direction of the inflow hole 111, the diameter of the open end of the expansion chamber 103 gradually increases, and the plate body 20 is embedded and installed in the opening and adapted to the shape of the expansion chamber 103.

[0062] It can be understood that the opening of the expansion chamber 103 is in the shape of a truncated cone, with its small diameter end facing the inflow hole 111 and the large diameter end open, so that the expansion chamber 103 is in the shape of an inverted truncated cone, and the cavity wall of the expansion chamber 103 at the opening is annular and is set at an angle to the axial direction of the expansion chamber 103, and along the flow direction of the inflow hole 111, the cavity wall is inclined in the direction away from the axis of the expansion chamber 103, and the shape of the plate body 20 is adapted to the truncated cone portion of the expansion chamber 103, that is, the side wall of the plate body 20 is at an angle to the axial direction of the expansion chamber 103. The expansion cavity 103 is set at a certain degree, and along the flow direction of the inflow hole 111, the cavity wall is inclined in the direction away from the axis of the expansion cavity 103. The plate body 20 can be embedded in the opening during installation and cooperate with the frustum part of the expansion cavity 103. Since the cavity wall of the expansion cavity 103 is set at an angle relative to the axis, the cavity wall of the expansion cavity 103 can provide a certain support for the plate body 20, thereby improving the reliability of the connection between the plate body 20 and the shell 10. Specifically, the plate body 20 can be further fixed to the shell 10 by interference connection or welding.

[0063] In some embodiments of the present invention, the axial direction of the diverter hole 201 is set at an angle to the axial direction of the inflow hole 111, and along the flow direction of the diverter hole 201, the axial direction of the diverter hole 201 is inclined away from the axis of the inflow hole 111.

[0064] It is understood that since the plate body 20 is inclined at a certain angle relative to the axis of the inflow hole 111 and the expansion chamber 103, the diverter hole 201 can also be inclined at a certain angle relative to the axis of the inflow hole 111 and the expansion chamber 103 for ease of processing. Specifically, the angle between the axis of the diverter hole 201 and the axis of the expansion chamber 103 can be set to 5°, so that the openings of the diverter holes 201 on the side of the plate body 20 away from the expansion chamber 103 are more dispersed, thereby making the connection and installation between the first connecting tube 200 and the diverter hole 201 more convenient and easier to operate. In addition, the plate surface of the plate body 20 on the side away from the expansion chamber 103 can also be set to be conical, and the angle between the plate surface of the plate body 20 on the side away from the expansion chamber 103 and the radial direction of the expansion chamber 103 is 5°.

[0065] In some embodiments of the present invention, the plate body 20 includes a first plate body 21 and a second plate body 22 arranged opposite to each other, the first plate body 21 is arranged in the expansion cavity 103, the second plate body 22 is connected to the shell 10 and closes the opening, the first plate body 21 is provided with a plurality of diversion holes 201, the second plate body 22 is provided with a plurality of insertion holes 202, the insertion holes 202 are coaxially arranged with the diversion holes 201, the aperture of the insertion holes 202 is larger than the aperture of the diversion holes 201, the diversion assembly 1000 also includes a first connecting pipe 200, the first end of the first connecting pipe 200 is inserted into the insertion hole 202 and is connected to the diversion hole 201, and the end face of the first end is connected to the plate surface of the second plate body 22 on the side facing away from the expansion cavity 103.

[0066] It is understood that the plate body 20 can be composed of a first plate body 21 and a second plate body 22, which are separately arranged. The first plate body 21 is located in the expansion cavity 103 and is provided with a diverter hole 201 for adjusting the distribution flow. The diverter hole 201 can be a straight hole or a gradually expanding hole along the flow direction. The second plate body 22 can be fixedly connected to the first plate body 21 by welding or clamping, and the outer edge of the second plate body 22 is fixed to the housing 10 by clamping or welding. The second plate body 22 is provided with an insertion hole 202 for inserting one end of the first connecting tube 200 into the insertion hole 202 to achieve the connection between the first connecting tube 200 and the plate body 20. The first connecting tube 200 is connected to the expansion cavity 103 through the diverter hole 201. Specifically, the aperture of the insertion hole 202 can be set to be larger than the aperture of the diversion hole 201, so that a step structure is formed at the insertion hole 202 and the diversion hole 201, so that the end of the first connecting tube 200 after being inserted into the insertion hole 202 can abut against the plate surface of the first plate body 21. The first connecting tube 200 can be welded to the first plate body 21, and the connection between the peripheral wall of the first connecting tube 200 and the hole wall of the insertion hole 202 is coordinated to expand the connection area between the first connecting tube 200 and the plate body 20, thereby improving the reliability of the connection.

[0067] In some embodiments of the present invention, along the axial direction of the diverter hole 201, the thickness of the second plate body 22 is greater than or equal to 1.5 mm, the thickness of the first plate body 21 is L, the aperture of the diverter hole 201 is D, and the aperture of the insertion hole 202 is D, where D≥D+2L.

[0068] It is understood that the thickness of the second plate 22 can be optimized to a certain thickness, thereby increasing the axial length of the insertion hole 202 on the second plate 22 to a certain value, thereby ensuring a more reliable connection between the first connecting tube 200 and the insertion hole 202. Furthermore, the ratio between the diameter of the insertion hole 202 and the diameter of the diverter hole 201 can be optimized to ensure an appropriate plate surface area between the insertion hole 202 and the diverter hole 201, thereby facilitating the abutment and fixation of the end of the first connecting tube 200 against the plate surface. Specifically, this structure can expand the connection area between a rigid and thick metal tube, such as stainless steel, and the first plate 21.

[0069] In some embodiments of the present invention, along the axial direction of the diverter hole 201 , the ratio of the thickness of the second plate 22 to the aperture of the diverter hole 201 is greater than 0.5.

[0070] It is understandable that by optimizing the thickness of the second plate 22 so that the second plate 22 has a certain thickness, the axial length of the insertion hole 202 on the second plate 22 is greater than a certain value, making the connection between the first connecting tube 200 and the insertion hole 202 more reliable.

[0071] In some embodiments of the present invention, one end of the inlet pipe 301 facing away from the shell 10 is closed, and the tube wall of the inlet pipe 301 is provided with a side hole 3013, which is connected to the first tube cavity 3014. The diversion component 1000 also includes an incoming flow pipe 302, one end of the incoming flow pipe 302 is connected to the inlet pipe 301 through the side hole 3013, and the other end of the incoming flow pipe 302 is used for fluid inflow, and the axial direction of the incoming flow pipe 302 is tangent to the circumferential direction of the inlet pipe 301.

[0072] It is understandable that one end of the incoming flow pipe 302 is tangentially connected to the side wall of the inlet pipe 301, and the inlet pipe 301 and the distributor can be welded or integrally formed. The incoming flow pipe 302 and the inlet pipe 301 can be welded to introduce the refrigerant into the distributor. The side hole 3013 can be set at the end of the inlet pipe 301 away from the distributor, and the diameter of the inlet pipe 301 can be set larger than the incoming flow pipe 302, so that after the refrigerant from the incoming flow pipe 302 enters the inlet pipe 301 tangentially, under the action of centrifugal force, the refrigerant forms an annular flow inside the inlet pipe 301, flows along the circumference of the inlet pipe 301, and flows in a spiral shape toward the inflow hole 111, so that the vapor and liquid phases of the refrigerant are fully mixed here, and the vapor and liquid phases of the refrigerant are evenly distributed, and the flow resistance is reduced, thereby improving the circulation efficiency.

[0073] In some embodiments of the present invention, a transition lumen 3016 is further formed in the inlet pipe 301 . The transition lumen 3016 is coaxially arranged between the first lumen 3014 and the second lumen 3015 . Along the flow direction of the fluid in the inlet pipe 301 , the flow area of ​​the transition lumen 3016 gradually decreases.

[0074] It can be understood that a transition lumen 3016 can be set between the first lumen 3014 and the second lumen 3015, and the transition lumen 3016 is in a truncated cone shape, and its flow area gradually decreases along the flow direction, so that the fluid from the first lumen 3014 enters the second lumen 3015 after passing through the transition lumen 3016. The provision of the transition lumen 3016 makes the fluid flow smoother and reduces the flow resistance.

[0075] In some embodiments of the present invention, the first lumen 3014 is cylindrical, the diameter of the first lumen 3014 is D1, the diameter of the incoming flow tube 302 is D2, and the ratio of D1 to D2 ranges from 2 to 5.

[0076] It is understood that the ratio of the diameter of the first lumen 3014 to the diameter of the incoming flow tube 302 can be optimized. By controlling the diameter of the first lumen 3014, the space in the first lumen 3014 is not too large compared to the size of the incoming flow tube 302, causing the fluid to flow slowly within the first lumen 3014 and reduce flow efficiency. Furthermore, the space in the first lumen 3014 is not too small compared to the size of the incoming flow tube 302, which shortens the fluid's residence time within the first lumen 3014 and causes it to flow out of the first lumen 3014 before achieving mixing. This increases the residence time of the gas-liquid two-phase refrigerant within the first lumen 3014, thereby improving the refrigerant mixing efficiency.

[0077] In some embodiments of the present invention, the first lumen 3014 is cylindrical, the axial length of the first lumen 3014 is D3, the diameter of the incoming flow tube 302 is D2, and the ratio of D3 to D2 ranges from 3 to 5.

[0078] It is understood that the ratio of the axial length of the first lumen 3014 to the diameter of the incoming flow tube 302 can be optimized. By controlling the axial length of the first lumen 3014, the space in the first lumen 3014 is not too large compared to the dimensions of the incoming flow tube 302, causing the fluid to flow slowly within the first lumen 3014 and reduce flow efficiency. Furthermore, the space in the first lumen 3014 is not too small compared to the dimensions of the incoming flow tube 302, which shortens the fluid's residence time within the first lumen 3014 and causes it to flow out of the first lumen 3014 before achieving mixing. This increases the residence time of the gas-liquid two-phase refrigerant within the first lumen 3014, thereby improving the refrigerant mixing efficiency.

[0079] In some embodiments of the present invention, the first lumen 3014 is cylindrical, the diameter of the first lumen 3014 is D1, the axial length of the first lumen 3014 is D3, and the ratio of D3 to D1 ranges from 2.5 to 0.6.

[0080] It is understood that the ratio of the axial length of the first lumen 3014 to its diameter can be optimized. By controlling the shape of the first lumen 3014, the space in the first lumen 3014 can be controlled to prevent it from being too wide or too long, thereby slowing the flow of fluid within the first lumen 3014 and reducing flow efficiency. Furthermore, the space in the first lumen 3014 can be controlled to prevent it from being too narrow or too short, thereby preventing the fluid from staying in the first lumen 3014 too short and flowing out of the first lumen 3014 before mixing is achieved. This increases the residence time of the gas-liquid two-phase refrigerant within the first lumen 3014, thereby improving the refrigerant mixing efficiency.

[0081] In some embodiments of the present invention, the diversion assembly 1000 also includes an incoming flow tube 302, one end of which is connected to the inlet pipe 301, and the other end of the incoming flow tube 302 is used for fluid inflow, and at least part of the inner wall of the incoming flow tube 302 has a threaded structure 3024, and the threaded structure 3024 is constructed to extend spirally along the axial direction of the incoming flow tube 302.

[0082] It can be understood that one end of the incoming flow pipe 302 may be in a constricted structure 3028 so as to be plugged into the end of the inlet pipe 301 away from the housing 10 to achieve communication between the incoming flow pipe 302 and the inlet pipe 301. A threaded structure 3024 is provided on the inner wall of the incoming flow pipe 302. The threaded structure 3024 extends in a spiral shape along the axial direction of the incoming flow pipe 302. The length of the threaded structure 3024 along the axial direction of the incoming flow pipe 302 may be consistent with the length of the incoming flow pipe 302, or may be partially connected to the incoming flow pipe 302. A bolt structure is set in the section. For example, the incoming flow pipe 302 can be set to a U-shaped or S-shaped pipe with a bend, so that the refrigerant can flow along a curved path in the incoming flow pipe 302, and collide with the pipe wall of the incoming flow pipe 302 when flowing to fully mix the gas-liquid two-phase refrigerant. According to the flow resistance design requirements, it can be seen that the straight pipe section of the incoming flow pipe 302 is set with a threaded structure 3024, so that the gas-liquid two-phase of the refrigerant can be fully mixed here, so as to achieve uniform distribution of the gas-liquid two-phase refrigerant, reduce flow resistance, and improve circulation efficiency.

[0083] In some embodiments of the present invention, at least a portion of the incoming flow pipe 302 is U-shaped, and the incoming flow pipe 302 includes a first straight pipe section 3025, a curved pipe section 3026, and a second straight pipe section 3027 connected in sequence. The first straight pipe section 3025 and the second straight pipe section 3027 are arranged in parallel, and the end of the first straight pipe section 3025 away from the curved pipe section 3026 is connected to the inlet pipe 301. The threaded structure 3024 includes a first threaded section 30241 and a second threaded section 30242. The first threaded section 30241 is arranged on the inner wall of the first straight pipe section 3025, and the second threaded section 30242 is arranged on the inner wall of the second straight pipe section 3027.

[0084] It is understood that the overall U-shaped extension of inlet flow tube 302 allows the gas-liquid two-phase refrigerant entering inlet flow tube 302 to collide with the tube wall at the bend of the U-shaped inlet flow tube 302, thereby causing the refrigerant to flow in different directions, thereby fully mixing the gas-liquid two-phase refrigerant and improving the uniformity of the refrigerant before the distributor. Furthermore, the U-shaped inlet flow tube 302 can minimize its vertical height, thereby reducing the occurrence of liquid and oil accumulation at the bottom of the heat exchanger located downstream of the diverter assembly 1000 under low-load cooling conditions of the HVAC equipment.

[0085] Specifically, the first straight pipe section 3025 and the second straight pipe section 3027 are straight pipe structures. The first straight pipe section 3025 and the second straight pipe section 3027 can be arranged in parallel. The curved pipe section 3026 is arc-shaped, and its two ends are respectively connected to the first straight pipe section 3025 and the second straight pipe section 3027, so that the incoming flow pipe 302 extends in a U shape. A first threaded section 30241 can be set on at least part of the pipe wall of the first straight pipe section 3025. The first threaded section 30241 can extend along the length direction of the first straight pipe section 3025, so that the refrigerant can produce annular mixed flow under the action of the guide groove of the first threaded section 30241 when flowing through the first straight pipe section 3025, so that the mixing of the gas-liquid two-phase refrigerant is more uniform. A second threaded section 30242 may be provided on at least a portion of the wall of the second straight pipe section 3027. The second threaded section 30242 may extend along the length of the second straight pipe section 3027. This allows the refrigerant to generate an annular mixed flow due to the flow guide grooves of the second threaded section 30242 as it flows through the second straight pipe section 3027, resulting in more uniform mixing of the gas-liquid two-phase refrigerant. The inner wall of the curved pipe section 3026 may be smooth, thereby reducing flow resistance, improving circulation efficiency, and facilitating processing.

[0086] In addition, the threaded structure 3024 can be formed by extruding the incoming flow tube 302 into a spiral structure protruding into the inner cavity of the tube through a mold, which makes processing convenient and low-cost, and can guide the refrigerant flowing through to produce annular vortex flow, thereby improving the uniformity of the refrigerant.

[0087] In some embodiments of the present invention, the thread depth of the thread structure 3024 is L, the thread width of the thread structure 3024 is W, and the ratio of W to L ranges from 0.5 to 2. The thread depth refers to the distance from the head of the thread teeth of the thread structure 3024 to the bottom of the thread teeth along the radial direction of the incoming flow tube 302, and the thread width refers to the length of the thread teeth along the axial direction of the incoming flow tube 302. By optimizing the ratio range of the thread depth and thread width of the thread structure 3024, the flow area of ​​the thread structure 3024 is optimized, and the thread structure 3024 has a certain depth, thereby improving the thread structure 3024's guiding effect on the refrigerant, thereby generating an annular vortex of the refrigerant and fully mixing the gas-liquid two-phase refrigerant.

[0088] In some embodiments of the present invention, the thread distance of the thread structure 3024 is S, the thread width of the thread structure 3024 is W, and the ratio of W to S ranges from 1 to 2.5. The thread distance refers to the distance between the heads of two adjacent threads along the axial direction of the incoming flow tube 302. By optimizing the ratio range of the thread distance to the thread width of the thread structure 3024, the flow area of ​​the thread structure 3024 is optimized, and the thread structure 3024 is neither too dense nor too sparse, thereby improving the flow guidance effect of the thread structure 3024 on the refrigerant, thereby generating an annular swirl of the refrigerant and fully mixing the gas-liquid two-phase refrigerant.

[0089] In some embodiments of the present invention, along the axial direction of the incoming flow pipe 302, the length of the first thread segment 30241 ranges from 30 mm to 50 mm;

[0090] And / or, along the axial direction of the incoming flow pipe 302, the length of the second thread segment 30242 ranges from 30 mm to 50 mm.

[0091] It can be understood that by optimizing the length of the first thread segment 30241 and the second thread segment 30242, the length of the first thread segment 30241 and the second thread segment 30242 is made appropriate, so that the thread structure 3024 is not too long to cause excessive flow resistance, affecting the circulation efficiency, and the length of the thread structure 3024 can achieve the basic effect of generating annular vortex for the refrigerant, so that the gas-liquid two-phase refrigerant is fully mixed.

[0092] In some embodiments of the present invention, along the axial direction of the incoming flow tube 302 , the ratio of the length of the first thread segment 30241 to the diameter of the incoming flow tube 302 ranges from 3 to 5;

[0093] And / or, the ratio of the length of the second thread segment 30242 to the diameter of the incoming flow tube 302 is in a range of 3 to 5.

[0094] It can be understood that by optimizing the range of the ratio of the first thread segment 30241 and the second thread segment 30242 to the diameter of the incoming flow tube 302, the length of the first thread segment 30241 and the second thread segment 30242 is appropriate, so that the thread structure 3024 is not too long to cause excessive flow resistance, affecting the circulation efficiency, and the length of the thread structure 3024 can achieve the basic effect of generating annular vortex for the refrigerant, so that the gas-liquid two-phase refrigerant is fully mixed.

[0095] In some embodiments of the present invention, along the flow direction of the incoming flow pipe 302 , the rotation direction of the first thread segment 30241 is the same as the rotation direction of the second thread segment 30242 .

[0096] Alternatively, along the flow direction of the incoming flow pipe 302, the first thread segment 30241 extends in a counterclockwise spiral, and the second thread segment 30242 extends in a clockwise spiral.

[0097] It is understood that the rotation direction of the first thread segment 30241 can be set to be the same as the rotation direction of the second thread segment 30242, so that the gas-liquid two-phase refrigerant is initially mixed after being guided by the second thread segment 30242 to generate a swirl, and then further mixed after being guided again by the first thread segment 30241 to generate a swirl, thereby improving the mixing uniformity of the refrigerant. The rotation directions of the first thread segment 30241 and the second thread segment 30242 can also be set opposite. Specifically, the first thread segment 30241 can be set to extend in a counterclockwise spiral, i.e., a left-hand spiral, and the second thread segment 30242 can be set to extend in a clockwise spiral, i.e., a right-hand spiral. The refrigerant generates a clockwise swirl when passing through the second thread segment 30242, and then generates a counterclockwise swirl when passing through the first thread segment 30241. The refrigerant is further mixed after rotating in both directions, thereby fully mixing the gas-liquid two-phase refrigerant and improving the mixing uniformity of the refrigerant before diversion.

[0098] In some embodiments of the present invention, the diverter assembly 1000 also includes a diverter cone 30, the large diameter end of the diverter cone 30 is connected to the plate body 20, the small diameter end of the diverter cone 30 is arranged in the expansion cavity 103, the diverter cone 30 is coaxially arranged with the inflow hole 111, and along the axial direction of the inflow hole 111, the distance between the small diameter end of the diverter cone 30 and the inflow hole 111 is L, the aperture of the inflow hole 111 is D, and the ratio of L to D ranges from 0 to 5.

[0099] It is understood that the diverter cone 30 may be conical or pyramidal in shape, or may be a conical structure with a star-shaped cross-section. The diverter cone 30 may be formed separately and then welded to the side of the plate body 20 facing the expansion cavity 103. The diverter cone 30 may also be integrally formed with the plate body 20 and machined on the plate body 20 through a stamping process. The large-diameter end of the diverter cone 30 is connected to the plate body 20, and the small-diameter end of the diverter cone 30 may be disposed toward the inflow hole 111. The diverter cone 30 is coaxially disposed with the expansion cavity 103 and the inflow hole 111. The minimum distance between the small-diameter end of the diverter cone 30 and the inflow hole 111 along the axial direction of the inflow hole 111 is not too large. Specifically, the ratio of the diameter of the inflow hole 111 to the minimum distance between the small-diameter end of the diverter cone 30 and the inflow hole 111 along the axial direction of the inflow hole 111 is set to be between 0.5 and 1.5, so that the minimum distance between the small-diameter end of the diverter cone 30 and the inflow hole 111 along the axial direction of the inflow hole 111 is moderate. This allows the fluid entering the expansion chamber 103 from the inflow hole 111 to be immediately diverted by the diverter cone 30. This improves the diversion efficiency and shortens the length of the housing 10 in the axial direction of the expansion chamber 103, making the structure more compact.

[0100] In some embodiments of the present invention, the splitter cone 30 and the plate body 20 are an integrated structure.

[0101] It is understandable that the diverter cone 30 can be formed by stamping in the middle of the plate body 20, so that the structural strength is higher and the leakage risk is lower.

[0102] In some embodiments of the present invention, the splitter cone 30 may be a pyramid structure.

[0103] It can be understood that the diverter cone 30 is arranged in the expansion chamber 103, and the position of the inflow hole 111 is arranged relative to the top of the diverter cone 30, which can effectively guide the fluid to directly act on the central area of ​​the diverter cone 30. This arrangement ensures that the fluid first contacts the top of the diverter cone 30 after entering the expansion chamber 103, so that the fluid can be evenly dispersed to the different guide surfaces of the diverter cone 30. This not only reduces the turbulence of the fluid in the expansion chamber 103, but also ensures the consistency of the flow rate and flow rate of the fluid entering each guide surface. The diverter cone 30 has a pyramidal structure, and at least three guide surfaces on the diverter cone 30 are interconnected along its circumference and are arranged one-to-one with the diverter holes 201. This design ensures that each guide surface specifically guides the fluid into the corresponding diverter hole 201. Since the guide surfaces are continuously connected, they can effectively guide the fluid to flow downward from the top of the diverter cone 30, avoiding collision and turbulence of the fluid in the cavity, and ensuring uniform distribution of the fluid. After entering through the inlet 111, the fluid directly contacts the top of the diverter cone 30 and is then smoothly dispersed along the guide surface to each diverter hole 201. Due to the corresponding relationship between the guide surface and the diverter holes 201, the fluid flow rate received by each diverter hole 201 is relatively consistent, further improving the diversion uniformity of the system.

[0104] Alternatively, the diverter cone 30 has a star-shaped cone structure with a plurality of guide grooves arranged along its circumference.

[0105] It can be understood that the cross-section of the diverter cone 30 is triangular, and the diverter cone 30 has a plurality of guide grooves arranged along the circumference of the diverter cone 30, and the guide grooves extend along the height direction of the diverter cone 30. The radial cross-section of the guide grooves along the diverter cone 30 can be an arc surface, or a U-shape, and the guide grooves are arranged in a one-to-one correspondence with the diverter holes 201. Such a design ensures that each guide groove specifically guides the fluid into the corresponding diverter hole 201. Since the guide grooves are continuously connected, they can effectively guide the fluid to flow downward from the top of the diverter cone 30, avoiding collisions and turbulence of the fluid in the cavity, and ensuring uniform distribution of the fluid. After the fluid enters from the inlet 111, it directly contacts the top of the diverter cone 30, and is then smoothly dispersed to each diverter hole 201 along the guide grooves. Due to the corresponding relationship between the guide grooves and the diverter holes 201, the fluid flow received by each diverter hole 201 is relatively consistent, further improving the diversion uniformity of the system. Specifically, the small diameter end of the splitter cone 30 can be set in a hemispherical shape, so that the splitter cone 30 does not produce stress concentration, improves the strength of the structure, and reduces damage to the small diameter end of the splitter cone 30 under large flow rates.

[0106] The second aspect of the present invention provides a method for producing a diverter assembly 1000, which is used to produce the diverter assembly 1000 provided in the first aspect of the present invention, comprising the following steps:

[0107] A sheet metal part 500 is provided, and the sheet metal part 500 is in a flat plate shape;

[0108] The sheet metal part 500 is punched into an expanded shape of a cylindrical structure, and the punched sheet metal part 500 is rolled to form the expansion cavity 103 and the lumen of the inlet tube 301. Alternatively, the sheet metal part 500 is rolled to form a cylindrical structure, and the rolled sheet metal part 500 is extruded to form the lumen of the expansion cavity 103 and the inlet tube 301.

[0109] The diverter assembly 1000 proposed in the first aspect of the present invention can be integrally formed from a single sheet metal part 500 using a sheet metal processing process. Specifically, this can be achieved by extruding a cylindrical sheet metal part 500 or rolling a prefabricated sheet metal part 500. This reduces the number of connection points in the overall structure, enhances structural strength, and reduces the number of parts, resulting in higher production efficiency. Furthermore, since the housing 10 and inlet pipe 301 are integrally formed, there are no leak points, reducing the risk of leakage during use.

[0110] In some embodiments of the present invention, the step of extruding the rolled sheet metal part 500 to form the expansion cavity 103 and the lumen of the inlet tube 301 includes any one of the following steps:

[0111] Punching the two ends of the rolled sheet metal part 500 to form the expansion cavity 103 and the lumen of the inlet tube 301;

[0112] The circumference of the rolled sheet metal part 500 is spun to form the expansion cavity 103 and the lumen of the inlet tube 301 .

[0113] It is understood that the expansion cavity 103 and the lumen of the inlet pipe 301 can be formed by a spinning process. Specifically, a sheet metal part 500 with a relatively large diameter can be rolled and gradually spun along the design line (such as a curved Venturi throat) to achieve an integrated transition of the throat (i.e., the reduced diameter structure 3012), thereby forming the expansion cavity 103 and the lumen of the inlet pipe 301.

[0114] The expansion chamber 103 and the lumen of the inlet pipe 301 can also be formed by a coil welding process. Specifically, a flat sheet metal part 500 is stamped into a specific shape (such as the expanded shape of a Venturi-type throat), and a notch 501 is punched and cut out on the sheet metal part 500 according to the specifications of the throat (i.e., the reduced diameter structure 3012). Then, a coil welding process is performed to form the cylinder, and the connecting seam is welded and sealed to form the expansion chamber 103 and the lumen of the inlet pipe 301.

[0115] The expansion cavity 103 and the inlet tube 301 can also be formed by a stamping process at both ends. Specifically, a sheet metal part 500 with a smaller diameter is rolled up, and its two ends are expanded with different diameters according to the design line and mold stamped to realize the structure of the cylinder, thereby forming the expansion cavity 103 and the inlet tube 301.

[0116] The second aspect of the present invention provides a heating and ventilation device, comprising the flow diverter assembly 1000 provided in the first aspect of the present invention. The flow diverter assembly 1000 is connected to a first heat exchanger 2000 via a first connecting pipe 200 and to a refrigeration throttle valve 5000 via a second connecting pipe 300. The refrigeration throttle valve 5000 includes an inlet pipe 301 and an inlet pipe 302 connected in sequence.

[0117] The HVAC equipment disclosed in the second aspect of the present invention comprises a diverter assembly 1000 with an integrally formed main body. The housing 10 and inlet pipe 301 of the diverter assembly 1000 are integrally formed from a single sheet metal member 500 through sheet metal processing. Specifically, the assembly can be manufactured by extruding a cylindrical sheet metal member 500 or rolling a prefabricated sheet metal member 500. This reduces the number of connection points in the overall structure, enhances structural strength, and reduces the number of parts, resulting in higher production efficiency. Furthermore, since the housing 10 and inlet pipe 301 are integrally formed, there are no leak points, reducing the risk of leakage during use.

[0118] It is understandable that if Figure 13 As shown, the HVAC equipment 1 provided in the second aspect of the present invention can be an air conditioner. The HVAC equipment 1 includes the aforementioned diversion assembly 1000, a first heat exchanger 2000, a second heat exchanger 3000, a compressor 4000, a refrigeration throttle valve 5000, and a four-way valve 6000. After the refrigerant is diverted from the diversion assembly 1000, it flows to the first heat exchanger 2000. The first heat exchanger 2000 absorbs heat from the refrigerant, which then absorbs heat from the environment and evaporates. The evaporated refrigerant flows to the compressor 4000 for pressurization, and the pressurized refrigerant is then delivered to the four-way valve 6000. The four-way valve 6000 is used to adjust the flow direction of the refrigerant to switch the air conditioner between cooling and heating modes.

[0119] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A diversion component, characterized in that: include: a shell defining an expansion cavity therein, the expansion cavity having an opening, the shell further comprising an inlet hole, the inlet hole being in communication with the expansion cavity and being located at an end of the expansion cavity away from the opening; a plate body, mounted on the shell and closing the opening, the plate body having a plurality of diversion holes, the diversion holes being in communication with the expansion cavity; an inlet pipe, one end of which is connected to the housing and communicates with the inlet hole, and the other end of which is used to introduce fluid; Wherein, the shell and the inlet pipe are an integrated sheet metal structure.

2. The flow diversion assembly according to claim 1, characterized in that: A first lumen and a second lumen are coaxially formed in the inlet tube. The first lumen is connected to the inflow hole through the second lumen. The flow area of ​​the second lumen is smaller than that of the first lumen.

3. The flow diversion assembly according to claim 1, characterized in that: The expansion cavity is a rotating body structure. Along the axial direction of the expansion cavity, the cross section of the expansion cavity is hemispherical, and along the flow direction of the inflow hole, the diameter of the expansion cavity gradually increases.

4. The flow diversion assembly according to claim 1, characterized in that: An installation groove is provided at the outer edge of the plate body facing the expansion cavity. The installation groove is arranged around the axis of the inflow hole. The end of the shell facing away from the inflow hole is installed in the installation groove.

5. The flow diversion assembly according to claim 1, characterized in that: The expansion cavity has a truncated cone-shaped end with the opening, and the diameter of the expansion cavity with the opening gradually increases along the flow direction of the inflow hole. The plate body is embedded in the opening and adapted to the shape of the expansion cavity.

6. The flow diversion assembly according to claim 5, characterized in that: The axial direction of the diverter hole is arranged at an angle to the axial direction of the inflow hole, and along the flow direction of the diverter hole, the axial direction of the diverter hole is inclined in a direction away from the axis of the inflow hole.

7. The flow diversion assembly according to claim 1, characterized in that: The plate body includes a first plate body and a second plate body arranged opposite to each other, the first plate body is arranged in the expansion cavity, the second plate body is connected to the shell and closes the opening, the first plate body is provided with a plurality of diversion holes, the second plate body is provided with a plurality of insertion holes, the insertion holes are coaxially arranged with the diversion holes, the insertion holes are larger than the aperture of the diversion holes, the diversion assembly also includes a first connecting pipe, the first end of the first connecting pipe is inserted into the insertion hole and communicated with the diversion hole, the end face of the first end is connected to the plate surface of the second plate body on the side facing away from the expansion cavity.

8. The flow diversion assembly according to claim 2, characterized in that: The inlet pipe is closed at one end facing away from the shell, and a side hole is provided on the wall of the inlet pipe, which is connected to the first tube cavity. The diversion assembly also includes an incoming flow pipe, one end of which is connected to the inlet pipe through the side hole, and the other end of the incoming flow pipe is used for fluid inflow, and the axial direction of the incoming flow pipe is tangent to the circumferential direction of the inlet pipe.

9. The flow diversion assembly according to claim 2, characterized in that: The diversion assembly also includes an incoming flow pipe, one end of which is connected to the inlet pipe, and the other end of the incoming flow pipe is used for fluid inflow, at least part of the inner wall of the incoming flow pipe has a threaded structure, and the threaded structure is constructed to extend spirally along the axial direction of the incoming flow pipe.

10. The flow diversion assembly according to claim 9, characterized in that: At least a portion of the incoming flow pipe is U-shaped, and the incoming flow pipe includes a first straight pipe section, a curved pipe section, and a second straight pipe section connected in sequence. The first straight pipe section is arranged parallel to the second straight pipe section, and the end of the first straight pipe section away from the curved pipe section is connected to the inlet pipe. The threaded structure includes a first threaded section and a second threaded section. The first threaded section is arranged on the inner wall of the first straight pipe section, and the second threaded section is arranged on the inner wall of the second straight pipe section.

11. The flow diversion assembly according to any one of claims 1 to 10, characterized in that: The diverter assembly also includes a diverter cone, the large diameter end of the diverter cone is connected to the plate body, the small diameter end of the diverter cone is arranged in the expansion cavity, the diverter cone is coaxially arranged with the inflow hole, and along the axial direction of the inflow hole, the distance between the small diameter end of the diverter cone and the inflow hole is L1, the aperture of the inflow hole is D, and the ratio of L1 to D ranges from 0 to 5.

12. A HVAC equipment, characterized in that: Comprising the diversion assembly according to any one of claims 1 to 11.

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