Switching assembly for refrigerant diversity device, refrigerant diversity device and machining method

Abstract

The invention provides a switching assembly for a refrigerant diversity device, the refrigerant diversity device and a machining method. The adapter assembly comprises an adapter plate and at least one branch pipe lining, the adapter plate is provided with a plurality of adapter holes distributed in rows and columns, the hole diameter of at least one part of the adapter holes is larger than the outer diameter of the branch pipe assembled with the adapter holes, and an annular positioning adjusting gap which is basically coaxial with the adapter holes is formed between the adapter holes and the peripheral wall of the branch pipe. The branch pipe lining is arranged in a transfer hole with the hole diameter larger than the outer diameter of the corresponding branch pipe, and the corresponding branch pipe is sleeved with the branch pipe lining which is embedded into the positioning adjusting gap. Wherein the position where each branch pipe lining is located is provided with two solder bearing parts which are separated based on the peripheral wall of the branch pipe lining, and a brazing material at the first solder bearing part directionally permeates into an assembly gap between the inner peripheral wall of the branch pipe lining and the outer peripheral wall of the branch pipe to form a first brazing layer; and the brazing material at the second brazing material bearing part directionally permeates into an assembly gap between the outer peripheral wall of the branch pipe lining and the hole wall of the transfer hole to form a second brazing layer.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration fittings, and particularly to an adapter assembly for a refrigerant manifold, a refrigerant manifold and a processing method. Background Art

[0002] Existing shell-and-tube heat exchangers generally adopt a multi-pass and multi-tube structure to improve heat transfer efficiency. The core challenge lies in evenly distributing the tube-side medium to a densely arranged heat exchange tube array. Although the uniformity of refrigerant distribution can be optimized by configuring a distributor, there is a significant spatial topological contradiction between the branch pipe layout on the distributor and the arrangement of heat exchange tubes in the shell-and-tube heat exchanger: For the sake of distribution uniformity, multiple branch pipes on the distributor adopt a circular array or a single-row distribution; while in the shell-and-tube heat exchanger, multiple heat exchange tubes usually adopt a compact determinant arrangement, that is, multiple heat exchange tubes are regularly arranged in a horizontal and vertical row-and-column staggered manner on the tube sheet.

[0003] There is a misalignment in the spatial topological structure between the determinant arrangement of heat exchange tubes and the circular array distribution (or single-row distribution) of the distributor branch pipes. The end position of the branch pipe cannot correspond to the inlet position of the corresponding heat exchange tube. During installation, the end position of each branch pipe needs to be adjusted one by one to adapt to the inlet position of the corresponding heat exchange tube. This operation method of correcting each branch pipe one by one is not only difficult and inefficient, but also the dense tube spacing greatly limits the fine correction of the end position of each branch pipe. The accumulation of correction errors and form and position tolerances will cause it difficult for some branch pipes to accurately dock with the corresponding heat exchange tube orifices, which not only makes the assembly difficult, but also the welding assembly gap after assembly is difficult to stably control and is extremely likely to cause seal failure. Further, due to the large volume of the heat exchange tube assembly, it is impossible to detect leakage points after the multiple branch pipes and multiple heat exchange tubes are hermetically connected, which poses a great challenge to the welding reliability of this product.

[0004] In addition, in the existing shell-and-tube heat exchanger, the outlets of each heat exchange tube are all gathered in the tube box of the shell-and-tube heat exchanger and are output through a refrigerant output pipe connected to the cover of the box. In this structure, the refrigerant output pipe is sealed on the cover of the box by bolts and sealing gaskets. This sealing method not only has low sealing strength but also has the risk of leakage due to gasket aging. Similarly, some people have proposed to use a collector for refrigerant collection and output. However, at this time, it is also necessary to solve the spatial topological structure conversion between the outlets of the determinant-arranged heat exchange tubes and the branch pipes of the collector arranged in a circular array, as well as the sealed welding problem between the heat exchange tubes and the corresponding collector branch pipes. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an adapter assembly for a refrigerant manifold, a refrigerant manifold and a processing method.

[0006] To achieve the above object, a first aspect of the present invention provides an adapter assembly for a refrigerant manifold, which includes an adapter plate and at least one branch pipe bushing. The adapter plate has a plurality of adapter holes for sealingly connecting multiple branch pipes on the refrigerant manifold and arranged in rows and columns. The diameters of at least some of the adapter holes are larger than the outer diameters of the corresponding branch pipes, and a positioning and adjustment gap that is substantially coaxial with the adapter holes and annular is formed between the adapter holes and the outer peripheral walls of the branch pipes. The branch pipe bushing is disposed in the adapter hole with a diameter larger than the outer diameter of the corresponding branch pipe. The branch pipe bushing is sleeved on the corresponding branch pipe and embedded in the positioning and adjustment gap.

[0007] Wherein, at each location of each branch pipe bushing, there are two solder-bearing parts separated based on the peripheral wall of the branch pipe bushing. The brazing solder at the first solder-bearing part penetrates directionally into the assembly gap between the inner peripheral wall of the branch pipe bushing and the outer peripheral wall of the branch pipe to form a first brazing layer, and the brazing solder at the second solder-bearing part penetrates directionally into the assembly gap between the outer peripheral wall of the branch pipe bushing and the hole wall of the adapter hole to form a second brazing layer.

[0008] According to an embodiment of the first aspect of the present invention, the branch pipe bushing includes a bushing connection section with an inner diameter substantially close to the outer diameter of the corresponding branch pipe and a bushing end section located at one end of the bushing connection section and having an inner diameter larger than the outer diameter of the corresponding branch pipe. The first solder-bearing part is formed at the bushing end section and / or a guiding part for guiding the branch pipe bushing to be sleeved onto the branch pipe is formed. The first solder-bearing part is an inclined inner peripheral wall, an arc-shaped inner peripheral wall or a stepped surface of the bushing end section;

[0009] Alternatively, a first solder-bearing part is formed at the end face of the branch pipe bushing close to the end of the branch pipe and the first solder-bearing part is a flat surface.

[0010] According to an embodiment of the first aspect of the present invention, bushing end sections are formed at both ends of the branch pipe bushing. The bushing end section far from the end of the branch pipe forms a guiding part, and the first solder-bearing part is formed at the inner peripheral wall of the bushing end section at the other end.

[0011] According to an embodiment of the first aspect of the present invention, a bushing end section is formed on one side of the branch pipe bushing far from the end of the branch pipe. The bushing end section forms a guiding part and the first solder-bearing part is formed at its inner peripheral wall.

[0012] According to an embodiment of the first aspect of the present invention, an annular space is formed between the inner peripheral wall of the bushing end section where the guiding part is located and the outer peripheral wall of the branch pipe, so that the inner peripheral wall of the bushing end section and the outer peripheral wall of the branch pipe do not contact each other.

[0013] According to an embodiment of the first aspect of the present invention, one end of the branch pipe bushing extends out of the adapter hole, and a second solder-bearing part is formed on the surface of the adapter plate at or near the adapter hole.

[0014] According to an embodiment of the first aspect of the present invention, a transition hole guiding section with a hole diameter larger than the outer diameter of the branch pipe bushing is formed near the end side of the branch pipe. A second solder bearing portion is formed at the inclined inner peripheral wall, rounded inner peripheral wall, and stepped surface of the transition hole guiding section;

[0015] Alternatively, the transition hole is a cylindrical hole with a substantially uniform inner diameter, and a second solder bearing portion is formed on the surface of the transition plate near the transition hole, and the second solder bearing portion is a flat surface.

[0016] According to an embodiment of the first aspect of the present invention, one side of the branch pipe bushing near the end of the branch pipe extends out of the transition hole. The outer diameter of the branch pipe bushing is smaller than the inner diameter of the port of the rear heat exchange pipe to be connected. The branch pipe bushing and the corresponding branch pipe end together serve as a connection end to be inserted into the port of the rear heat exchange pipe.

[0017] According to an embodiment of the first aspect of the present invention, the transition component for the refrigerant manifold further includes a pipe end transition pipe hermetically welded to the transition hole or the branch pipe end. The outer diameter of the pipe end transition pipe is larger than the outer diameter of the branch pipe end to be inserted into the port of the rear heat exchange pipe.

[0018] In a second aspect, the present invention further provides a refrigerant manifold that distributes refrigerant into each heat exchange pipe in the heat exchange component or collects the refrigerant in each heat exchange pipe of the heat exchange component. The refrigerant manifold includes a manifold body, a plurality of branch pipes, and the above-mentioned transition component for the refrigerant manifold. The plurality of branch pipes are arranged on the manifold body and are distributed in at least one ring-shaped array or a single row.

[0019] In a third aspect, the present invention further provides a heat exchange device, which includes the above-mentioned refrigerant manifold and a heat exchange component. The heat exchange component includes a tube sheet and a plurality of heat exchange pipes connected to the tube sheet in a determinant manner; the outer periphery of the transition plate in the transition component for the refrigerant manifold is hermetically welded to the tube sheet to form a sealed cavity therebetween, and the end of each branch pipe and / or the corresponding branch pipe bushing is inserted into the corresponding heat exchange pipe port at the sealed cavity.

[0020] In a fourth aspect, the present invention further provides a method for manufacturing the above-mentioned refrigerant manifold, which includes:

[0021] Manufacturing the transition plate and at least one branch pipe bushing: processing a plurality of transition holes corresponding to the ports of the rear heat exchange pipes in a determinant distribution on the transition plate, and at least a part of the transition holes have a hole diameter larger than the outer diameter of the branch pipes assembled therewith;

[0022] Bending the pipes to process the plurality of branch pipes on the refrigerant manifold so that the end of each branch pipe substantially faces the corresponding transition hole on the transition plate;

[0023] Assemble the adapter plate on multiple branch pipes of the refrigerant manifold so that each branch pipe is basically coaxially inserted into the corresponding through-hole of the adapter plate; for the through-hole with a diameter larger than the outer diameter of the corresponding branch pipe, a positioning and adjusting gap that is basically coaxial with the through-hole and annular is formed between the through-hole and the outer peripheral wall of the branch pipe;

[0024] Insert the branch pipe bushing onto the corresponding branch pipe from the end of the branch pipe and embed it in the positioning and adjusting gap; after assembly, there are two solder-bearing parts isolated from each other based on the peripheral wall of the branch pipe bushing at the location of each branch pipe bushing. The first solder-bearing part only communicates with the assembly gap between the inner peripheral wall of the branch pipe bushing and the outer peripheral wall of the branch pipe, and the second solder-bearing part only communicates with the assembly gap between the outer peripheral wall of the branch pipe bushing and the wall of the through-hole of the adapter plate;

[0025] Place the solder at the two solder-bearing parts where the branch pipe bushing is located and at other through-holes of the adapter plate where no branch pipe bushing is provided, and use a tunnel furnace to braze multiple branch pipes, branch pipe bushings, and the adapter plate at one time.

[0026] According to an embodiment of the fourth aspect of the present invention, the steps of assembling the adapter plate on multiple branch pipes of the refrigerant manifold include:

[0027] Process the positioning card: Based on the positions of the through-holes in adjacent rows or columns on the adapter plate, process two rows or two columns of open positioning slots located at the edge of the positioning card and in a partial arc shape on the positioning card, and the radius of the open positioning slots is basically close to the outer diameter of the branch pipe;

[0028] Assemble the positioning card: Snap multiple positioning cards into the space between adjacent rows or columns of branch pipes one by one and make the multiple positioning cards basically in the same plane. Adjust the distance between any two branch pipes in adjacent rows or columns based on the multiple open positioning slots on each positioning card so that the end of each branch pipe is basically coaxial with the corresponding through-hole;

[0029] Based on the positioning of multiple positioning cards, assemble the adapter plate into multiple branch pipes so that each branch pipe is basically coaxially inserted into the corresponding through-hole;

[0030] After that, remove the multiple positioning cards.

[0031] According to an embodiment of the fourth aspect of the present invention, the steps of assembling the adapter plate on multiple branch pipes of the refrigerant manifold further include:

[0032] After assembling multiple positioning cards, apply a clamping force in the arrangement direction of the multiple positioning cards so that each branch pipe is closely attached to the wall of the open positioning slot; then, assemble the adapter plate into multiple branch pipes.

[0033] In summary, the adapter assembly for the refrigerant manifold provided by the present invention converts the end positions of multiple branch pipes distributed in a ring or a single row on the refrigerant manifold into a determinant distribution that matches the ports of the heat exchange pipes through multiple adapter holes distributed in rows and columns on the adapter plate. In addition, by setting the aperture of at least a part of the adapter holes to be larger than the outer diameter of the corresponding branch pipes, a positioning adjustment gap is formed between the adapter holes and the branch pipes to create an assembly adjustment space, thereby allowing multiple branch pipes in different bending states to achieve synchronous alignment during assembly, and finally achieving a unified conversion of the spatial topological structure of the ends of multiple branch pipes.

[0034] Further, to achieve the sealed welding of the branch pipes and the corresponding adapter holes at the positioning adjustment gap, the present invention adopts double safeguard measures: a branch pipe bushing is added inside the positioning adjustment gap to precisely control the assembly gap, ensuring that the multi-layer assembly gaps between the branch pipes, the branch pipe bushings, and the adapter holes meet the requirements of the brazing process; on this basis, two mutually separated solder bearing parts are constructed on the peripheral wall of the branch pipe bushing, and the characteristic of their spatial separation is used to form two independent solder penetration paths, so that the brazing solder can respectively penetrate into the assembly gaps between the branch pipes and the bushings and between the bushings and the adapter holes. The spatially isolated solder supply paths enable each layer of the assembly gap to be filled with the brazing solder to form a continuous and dense metallurgical bonding layer. The present invention increases the assembly gap between the adapter holes and the branch pipes so that multiple branch pipes can be accurately and quickly assembled on the adapter plate, thereby realizing the unified conversion of the spatial positions of the ends of multiple branch pipes. On this basis, by setting the branch pipe bushing and two mutually separated solder bearing parts, the problem of sealed welding between the branch pipes and the adapter holes caused by the increased gap is effectively solved, ensuring that each branch pipe can be reliably sealed and welded inside the corresponding adapter hole.

[0035] To make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The figure shows a schematic structural diagram of a refrigerant manifold provided by an embodiment of the present invention.

[0037] Figure 1A As shown Figure 1 The figure shows a front view of the manifold body of the refrigerant manifold shown in the direction of the branch pipes.

[0038] Figure 2 As shown including Figure 1 The figure shows a schematic structural diagram of a heat exchange device of the refrigerant manifold shown.

[0039] Figure 3 As shown Figure 2 The enlarged schematic diagram at position B in

[0040] Figure 4 The figure shows a schematic structural diagram of a transfer component for a refrigerant manifold provided by an embodiment of the present invention.

[0041] Figure 5 As shown is Figure 4 a schematic structural diagram of the transfer board in the middle.

[0042] Figure 6 As shown is Figure 1 a partial schematic diagram of the branch pipe in the refrigerant manifold shown being assembled into the corresponding transfer hole.

[0043] Figure 7 As shown is Figure 6 a schematic structural diagram after embedding the branch pipe bushing and placing the brazing filler metal.

[0044] Figure 8 As shown is Figure 7 a schematic structural diagram after welding, which is also Figure 1 an enlarged schematic diagram of part A in

[0045] Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 a partial schematic diagram of a transfer component for a refrigerant manifold provided by another embodiment of the present invention.

[0046] Figures 17 to 30 The figure shows a schematic structural diagram of the manifold body in a refrigerant manifold provided by another embodiment of the present invention.

[0047] Figure 31 As shown is the Figure 1 flow schematic diagram of processing the refrigerant manifold shown.

[0048] Figure 32 As shown is Figure 31 the specific flow schematic diagram of step S30 in

[0049] Figure 33 a schematic structural diagram of the positioning card board used when processing the refrigerant manifold.

[0050] Figure 34 a schematic assembly diagram of the transfer board based on the positioning card board.

[0051] Figure 35 As shown is Figure 33 a schematic structural diagram from another perspective.

[0052] Figure 36 It is Figure 35 a schematic structural diagram of the edge card board in Detailed implementation mode

[0053] In the existing shell-and-tube heat exchanger, there is a spatial topological structure misalignment between the annular or single-row layout of the distributor branch pipes and the determinant arrangement of the ports of the heat exchange tubes, resulting in the need to adjust the end positions of each branch pipe one by one to achieve precise docking. The dense branch pipe spacing not only limits the calibration accuracy, but also causes assembly difficulties and seal failure problems due to error accumulation; further, it is difficult to detect leakage points after the distributor is welded to the heat exchange component, which exacerbates the leakage risk. In addition, for the collection of the refrigerant at the outlet end of the heat exchanger, the current collection method not only has a high risk of seal leakage, but also has the same spatial topological contradiction that the collection branch and the outlet of the heat exchange tube do not correspond.

[0054] In view of this, this embodiment provides a transfer component for a refrigerant manifold, a refrigerant manifold, a heat exchange device, and a processing method for a refrigerant manifold that are fast and accurate in assembly and have excellent sealing performance.

[0055] Figure 1 As shown, the refrigerant manifold 800 provided in this embodiment includes a manifold body 1, multiple branch pipes 2, and a transfer component 3 for a refrigerant manifold. As Figure 1A shown, a plurality of branch pipe holes 11 for assembling multiple branch pipes 2 and arranged in a multi-ring annular array are formed on the manifold body 1. The multiple branch pipes 2 are respectively assembled in the corresponding branch pipe holes 11 and are also arranged in a multi-ring annular array, and the ends of the multiple branch pipes 2 are assembled to the transfer component 3 for a refrigerant manifold. However, the present invention does not make any limitation thereto. In other embodiments, the transfer component for a refrigerant manifold provided by the present invention can also be applied to a refrigerant manifold component in which multiple branch pipes are arranged in a single-ring annular array or a single row.

[0056] Correspondingly, this embodiment also provides a heat exchange device including the above-mentioned refrigerant manifold 800. As Figure 2 shown, the heat exchange device includes two refrigerant manifolds 800, 800'. Among them, the refrigerant manifold 800 serves as a distributor to evenly distribute the refrigerant to each heat exchange tube 902 in the heat exchange component 900; and the other refrigerant manifold 800' serves as a collector, and its multiple branch pipes 2 are connected to the outlets of the multiple heat exchange tubes 902 at the sealing cavity 903' to collect the evaporated gaseous refrigerant and output it to the outside of the shell-and-tube heat exchanger through the main pipe 7'. However, the present invention does not make any limitation thereto. In other embodiments, the refrigerant distributor provided by the present invention can also be used only as a distributor or only as a collector.

[0057] Specifically, the heat exchange component 900 in the heat exchange device includes a tube sheet 901 and multiple heat exchange tubes 902 connected to the tube sheet 901 in a determinant manner. As Figure 3As shown in the figure, the outer perimeters of the adapter plates 31 and 31' within the refrigerant manifolds 800 and 800' are hermetically welded to the tube sheet 901. A sealed cavity 903 is formed between the adapter plate 31 and the tube sheet 901, and another sealed cavity 903' is formed between the adapter plate 31' and the tube sheet 901. Multiple branch pipes 2 on the refrigerant manifold 800 acting as a distributor are inserted and sleeved at the inlet ends of the heat exchange tubes 902 at the sealed cavity 903; while multiple branch pipes 2' on the refrigerant manifold 800' acting as a collector are inserted and sleeved at the outlet ends of the heat exchange tubes 902 at the sealed cavity 903'.

[0058] In the heat exchange device provided in this embodiment, the refrigerant manifold integrally seals all the connection points between the branch pipes 2 and the heat exchange tubes 902 through the sealed cavity 903 formed by the adapter plate 31 and the tube sheet 901. This sealing method eliminates the need to separately seal each connection node between the branch pipe 2 and the heat exchange tube 902, effectively eliminating the need for point-by-point sealing operations common in multi-pipeline systems. It can not only reduce the number of sealing points to improve sealing reliability, but also significantly reduce the assembly precision requirements between the branch pipe 2 and the corresponding heat exchange tube 902, making it more conducive to the integral assembly of multiple branch pipes 2. However, in this assembly method, to ensure sealing reliability, it is required that the peripheral wall of each branch pipe 2 be hermetically welded to the corresponding adapter hole 311 in the adapter assembly 3 for the refrigerant manifold.

[0059] To achieve the conversion of the spatial topological structure at the end of each branch pipe 2 and its hermetic welding to the corresponding adapter hole 311, as Figures 4 to 8 shown, the adapter assembly 3 for the refrigerant manifold provided in this embodiment includes an adapter plate 31 and at least one branch pipe bushing 32. The adapter plate 31 has multiple adapter holes 311 distributed in rows and columns, and the aperture of at least a part of the adapter holes 311 is larger than the outer diameter of the branch pipe 2 assembled with it. A positioning and adjustment gap 3110 that is basically coaxial with the adapter hole 311 and is annular is formed between the adapter hole 311 and the outer peripheral wall of the branch pipe 2. The branch pipe bushing 32 is arranged in the adapter hole 311 with an aperture larger than the outer diameter of the corresponding branch pipe 2. The branch pipe bushing 32 is sleeved outside the corresponding branch pipe 2 and embedded in the positioning and adjustment gap 3110. Among them, at each location where the branch pipe bushing 32 is located, there are two solder-bearing parts 32A and 32B separated based on the peripheral wall of the branch pipe bushing 32. The brazing solder at the first solder-bearing part 32A penetrates directionally into the assembly gap between the inner peripheral wall of the branch pipe bushing 32 and the outer peripheral wall of the branch pipe 2 to form a first brazing layer 331, and the brazing solder at the second solder-bearing part 32B penetrates directionally into the assembly gap between the outer peripheral wall of the branch pipe bushing 32 and the hole wall of the adapter hole 311 to form a second brazing layer 332. The first brazing layer 331 and the second brazing layer 332 hermetically weld the branch pipe 2, the branch pipe bushing 32, and the corresponding adapter hole 311.

[0060] As Figure 4 and Figure 5As shown, the adapter assembly 3 for the refrigerant manifold provided in this embodiment realizes the conversion of the layout of the ends of the branch pipes 2 from a circular or single-row distribution to a determinant distribution through the adapter holes 311 distributed in a determinant pattern; and forms an adjustment space by means of the positioning and adjustment gap 3110 between the adapter holes 311 and the corresponding branch pipes 2, so that multiple branch pipes in different bending states can be assembled onto the adapter plate 31 synchronously. In terms of sealing performance, the problem of excessive assembly gap caused by the positioning and adjustment gap 3110, which cannot be directly sealed and welded, is compensated by adding the branch pipe bushing 32; at the same time, based on the branch pipe bushing 32, two mutually separated solder-bearing parts 32A and 32B are formed to form two independent solder penetration paths, and the brazing solder at each solder-bearing part is directed into the corresponding assembly gap, forming a double independent sealing interface between the branch pipe 2, the branch pipe bushing 32, and the adapter hole 311 to improve the sealing reliability.

[0061] The following will be combined with Figures 4 to 8 to explain in detail the adapter assembly 3 for the refrigerant manifold provided in this embodiment in terms of reducing the assembly difficulty of multiple branch pipes and improving the sealing reliability.

[0062] In terms of reducing the assembly difficulty of multiple branch pipes: For the adapter holes 311, their ideal aperture is generally close to the outer diameter of the corresponding branch pipes 2, and an assembly gap that meets the requirements of brazing is formed between the two to achieve sealed welding, that is, they are basically assembled with equal diameters. However, in the actual working condition where the end positions of the branch pipes 2 are converted from a circular distribution or a single-row distribution to a determinant distribution, at least a part of the multiple compactly arranged branch pipes 2 needs to be bent and adjusted, and double spatial interference will be caused during the adjustment: Some branch pipes 2 have insufficient bending space due to the position limitation of adjacent branch pipes, and it is difficult for their ends to be inserted into the adapter holes 311 with basically the same diameter after bending; specifically, for example, in the case of multiple circular branch pipes, the branch pipes 2 on the middle circular ring have extremely limited bending space due to the double position limitation of the inner-ring branch pipes and the outer-ring branch pipes. At the same time, some branch pipes have a large deviation of the corresponding adapter holes 311 from the original circular distribution axis, and they need to be bent by a large amount to achieve assembly, such as the outer-ring branch pipes 2; and a large bend will not only pose a challenge to the mechanical properties of the branch pipe material, but also the change in the curvature of the internal flow path of the branch pipe will increase the refrigerant flow resistance and affect the distribution uniformity. In addition, when multiple circularly distributed branch pipes 2 are assembled onto the equal-diameter adapter holes 311 synchronously, the accumulation of geometric tolerances will also exacerbate the assembly difficulty.

[0063] Therefore, as Figure 6As shown in the figure, in this embodiment, it is arranged on the adapter plate 31. The aperture of at least a part of the adapter holes 311 is larger than the outer diameter of the branch pipe 2 assembled therewith. The positioning and adjustment gap 3110 between the adapter hole 311 and the branch pipe 2 is used to form an adjustment space. When the branch pipe 2 is bent under restriction, it can be quickly assembled into the corresponding adapter hole 311 by means of the larger space provided by the positioning and adjustment gap 3110. This design converts the traditional rigid assembly with completely matching pipe diameters into an elastic assembly based on the positioning and adjustment gap 3110, reduces the bending precision requirements when the spatial position of the end of the branch pipe 2 is converted, and resolves the influence of spatial interference on the conversion of multiple branch pipes 2 from a circular array distribution to a determinant distribution.

[0064] In this embodiment, the outer diameters of the ends of multiple branch pipes 2 are the same, and the aperture of each adapter hole 311 is larger than the outer diameter of the corresponding branch pipe 2. However, the present invention does not make any limitation thereto. In other embodiments, for the adapter holes whose central positions are not far from the centers of the corresponding branch pipe ends before bending, the aperture thereof can also be set to be basically close to the outer diameter of the corresponding branch pipe; for the adapter holes that are far away, the aperture thereof is set to be larger than the outer diameter of the corresponding branch pipe; that is, the apertures of multiple adapter holes are not equal, some apertures are close to the outer diameters of the corresponding branch pipes, and some apertures are larger than the outer diameters of the corresponding branch pipes. For the deviation distance between the center of the adapter hole and the center of the corresponding branch pipe end before bending, specifically, the row projection distance and column projection distance of the center of the adapter hole and the center of the corresponding branch pipe end before bending on the adapter plate can be calculated. When at least one of the two exceeds the set distance, the aperture of this adapter hole can be set to be larger than the outer diameter of the corresponding branch pipe. However, the present invention does not make any limitation thereto.

[0065] Specifically, in this embodiment, the apertures of each adapter hole 311 are equal and larger than the outer diameter of the corresponding branch pipe 2. However, the present invention does not make any limitation thereto. In other embodiments, the aperture of each adapter hole can also be set to be larger than the outer diameter of the corresponding branch pipe, but the apertures between the adapter holes can be unequal.

[0066] The positioning and adjustment gap 3110 at the adapter hole 311 provides an adjustment space for the synchronous assembly of multiple branch pipes 2 on the adapter plate 31. However, this gap design causes the fit gap between the branch pipe 2 and the adapter hole 311 to exceed the brazing process adaptation range, and there is a risk of welding seal failure. Therefore, as Figure 7 shown in the figure, in this embodiment, a branch pipe bushing 32 is added in the positioning and adjustment gap 3110, and an inner and outer two-stage assembly gap is formed through its double-layer structure: the inner assembly gap is distributed between the inner peripheral wall of the branch pipe bushing 32 and the outer peripheral wall of the branch pipe 2, and the outer assembly gap is located between the outer peripheral wall of the branch pipe bushing 32 and the hole wall of the adapter hole 311. The double-gap design simultaneously meets the requirements of assembly tolerance adjustment and brazing seal. On this basis, two independent solder bearing parts 32A and 32B are formed in structure based on the physical isolation characteristics of the branch pipe bushing 32. As Figure 8As shown, during brazing, the solder at the first solder bearing portion 32A is molten and directionally penetrates and fills the inner assembly gap to form a first brazing layer 331, while the solder from the second solder bearing portion 32B directionally penetrates and fills the outer assembly gap to form a second brazing layer 332. The directional flow mechanism of the two-way solder effectively controls the diffusion path of the solder, ensuring that the inner and outer gaps are evenly filled with a dense brazing layer, fundamentally eliminating the defects of cold solder joints and broken solder joints caused by the disordered flow of solder in multiple assembly gaps, and significantly improving the reliability of the sealed welding of the adapter assembly.

[0067] In this embodiment, the branch pipe bushing 32 includes a bushing connection section 321 whose inner diameter is substantially close to the outer diameter of the corresponding branch pipe 2 and a bushing end section located at one end of the bushing connection section 321 and whose inner diameter is greater than the outer diameter of the corresponding branch pipe 2. The bushing end section forms a first solder bearing portion 32A and / or a guide portion for guiding the branch pipe bushing 32 to be inserted into the outer portion of the branch pipe 2. Figure 7 and Figure 8 As shown, both ends of the bushing connection section 321 are formed with bushing end sections 322 and 323. Among them, the bushing end section 322 far away from the end of the branch pipe 2 (i.e., close to the distributor body 1) forms a guide portion, and the inner circumferential wall of the other bushing end section 323 forms a first solder bearing portion 32A. Specifically, the bushing end section 323 is a tapered hole section formed by chamfering or expanding, and its inclined inner circumferential wall serves as the first solder bearing portion 32A. However, the present invention does not impose any limitation on this. In other embodiments, the bushing end section 323 may also be a tapered hole section formed by rounded corners, and its arc inner circumferential wall serves as the first solder bearing portion 32A, such as Figure 9 Alternatively, the bushing end section 323 is a cylindrical hole section with an equal diameter, and the step surface between the bushing end section 323 and the bushing connection section 321 forms a first solder bearing portion 32A, as shown in FIG. Figure 10 Or, as Figure 11 As shown, the first solder bearing portion 32A is formed directly by using the end surface of the branch pipe bushing 32 close to the end of the branch pipe 2. At this time, the first solder bearing portion 32A is a plane.

[0068] In this embodiment, Figure 7As shown, the bushing end section 322 near one end of the splitter body 1 is designed as a guiding portion, whose inner diameter is slightly larger than the outer diameter of the branch pipe 2, forming a guiding structure to facilitate the smooth sleeving of the branch pipe bushing 32 onto the branch pipe 2. In actual assembly, to meet the assembly clamping requirements, the axial length of the branch pipe bushing 32 needs to be designed to be relatively long (usually higher than the effective welding depth between the branch pipe bushing and the branch pipe). Inevitably, the increase in the length of the branch pipe bushing 32 will bring about an increase in its inner surface area. Affected by the shape and position tolerance and surface roughness during the processing of the branch pipe 2, during the process of the branch pipe bushing 32 being sleeved over the branch pipe 2 and embedded into the positioning and adjustment gap 3110, the inner surface of the branch pipe bushing 32 is bound to contact the outer peripheral wall of the branch pipe 2 and generate frictional force, which will hinder the embedding of the branch pipe bushing 32; moreover, the larger the contact area between the two, the greater the frictional resistance will be, and the more difficult it will be to assemble the branch pipe bushing 32.

[0069] To solve this problem, in this embodiment, an annular gap 324 is provided between the inner peripheral wall of the bushing end section 322 and the outer peripheral wall of the branch pipe 2 to ensure that the two do not contact each other completely. This setting enables the axial length of the branch pipe bushing 32 to be designed to be relatively long to meet the assembly clamping requirements, and on the premise that the length of the bushing connection section 321 meets the welding depth of the branch pipe 2, the contact area between the branch pipe bushing 32 and the branch pipe 2 is reduced as much as possible, effectively reducing the assembly resistance when the branch pipe bushing 32 is embedded into the positioning and adjustment gap 3110 along the branch pipe 2, thereby reducing its assembly difficulty. In this embodiment, as Figure 7 shown, the bushing end section 322 is a cylindrical hole section with a larger inner diameter, and a cylindrical annular gap 324 is formed between it and the outer peripheral wall of the branch pipe 2, reducing its assembly resistance while guiding the assembly of the branch pipe bushing 32. However, the present invention does not make any limitation in this regard. In other embodiments, as Figure 12 shown, the bushing end section 322 can also be set as a tapered hole section with a larger inner diameter, and a tapered annular gap 324 is formed between it and the outer peripheral wall of the branch pipe 2.

[0070] Although this embodiment is described by taking the example that both ends of the branch pipe bushing 32 are formed with bushing end sections. However, the present invention does not make any limitation in this regard. In other embodiments, as Figure 13 shown, a bushing end section 322 can also be formed on the side of the branch pipe bushing 32 away from the end of the branch pipe 2. A guiding portion is formed at the bushing end section 322, and a first solder bearing portion 32A is formed at its inner peripheral wall. Similarly, the bushing end section 322 can be a rounded corner, a chamfer, or a tapered hole section after flaring, or a cylindrical hole section; a first solder bearing portion 32A is formed at its inclined inner peripheral wall, arc inner peripheral wall, or stepped surface.

[0071] In this embodiment, one end of the branch pipe bushing 32 extends out of the adapter hole 311, and a second solder bearing portion 32B is formed on the surface of the adapter plate 31 near the adapter hole 311 or the adapter hole 311; this structure realizes the separation of the two solder bearing portions 32A and 32B based on the axial direction of the circumferential wall of the branch pipe bushing 32. For the second solder bearing portion 32B, as Figure 7 and Figure 8 shown, the bushing end section 323 extends out of the adapter hole 311, and an adapter hole guiding section 3111 with a diameter larger than the outer diameter of the branch pipe bushing 32 is formed near the end side of the branch pipe 2 of the adapter hole 311. While guiding the branch pipe bushing 32 to be embedded and positioned to adjust the gap 3110, the circumferential wall of the adapter hole guiding section 3111 forms the second solder bearing portion 32B. In Figure 8 , the adapter hole guiding section 111 is a tapered hole section formed by a chamfer, and its inclined inner circumferential wall forms the second solder bearing portion 32B. However, the present invention does not make any limitation in this regard. In other embodiments, the adapter hole guiding section may also be a tapered hole section formed after rounding, and at this time, its arc inner circumferential wall will form the second solder bearing portion; alternatively, the adapter hole guiding section is a cylindrical hole section with a larger aperture, and the second solder bearing portion is formed at the stepped surface on its inner circumferential wall.

[0072] Figure 14 Shown is a partial schematic view of an adapter assembly for a refrigerant distributor provided by another embodiment of the present invention. In this structure, the adapter hole 311 is a cylindrical hole section with a substantially uniform inner diameter; at this time, a second solder bearing portion 32B is formed on the surface of the adapter plate 31 near the adapter hole 311, and the second solder bearing portion 32B is a plane.

[0073] Figure 15 Shown is a partial schematic view of an adapter assembly for a refrigerant distributor provided by another embodiment of the present invention. In this structure, one end of the branch pipe bushing 32 close to the distributor body 1 extends out of the adapter hole 311, and the second solder bearing portion 32B is formed on the circumferential wall of the adapter hole 311 or the outer circumferential wall of the branch pipe bushing 32 within the adapter hole 311.

[0074] In this embodiment, the bushing end section 323 close to the end of the branch pipe 2 extends out of the adapter hole 311 and its outer diameter is smaller than the inner diameter at the port of the rear heat exchange pipe to be connected. At this time, the bushing end section 323 and the end of the corresponding branch pipe 2 together serve as a connection end to be sleeved into the port of the rear heat exchange pipe 902, as Figure 3As shown. This setting can utilize the bushing end section 323 to narrow the insertion gap between the branch pipe 2 and the corresponding heat exchange pipe 902, preventing the refrigerant from flowing back into the sealing cavity 903 from the insertion gap. However, the present invention does not make any limitations in this regard. In the heat exchange device provided by the present invention, since a sealing cavity 903 is formed between the adapter plate 31 and the tube sheet 901 in the heat exchange assembly 900. At this time, even if part of the refrigerant in some branches flows back into the sealing cavity 903 from the insertion gap, it will not affect the normal distribution of the refrigerant; further, when the sealing cavity 903 is filled with the refrigerant, the pressure in the cavity will also resist the refrigerant from flowing back. Therefore, in other embodiments, it is also possible to only insert the end of the branch pipe into the corresponding port of the heat exchange pipe, and the branch pipe bushing is not inserted.

[0075] In addition, in other embodiments, it is also possible to narrow the insertion gap between the branch pipe 2 and the corresponding heat exchange pipe 902 by adding a pipe end transition pipe 34. Specifically, the pipe end transition pipe 34 is hermetically welded to the adapter hole 311 or the end of the branch pipe 2, and the outer diameter of the pipe end transition pipe 34 is larger than the outer diameter of the end of the branch pipe 2 so as to be inserted into the port of the rear heat exchange pipe 902, as Figure 16 shown. In this structure, the pipe end transition pipe 34 is a pipe fitting with a substantially uniform wall thickness, which includes a transition pipe connection section 341 and a transition pipe insertion section 342 with a larger inner diameter. The end of the branch pipe bushing 32 extends out of the adapter hole 311, the transition pipe connection section 341 is sleeved on the branch pipe 2 and abuts against the branch pipe bushing 32, and a first solder bearing portion 32A is formed at the connection between the transition pipe connection section 341 and the transition pipe insertion section 342. During brazing, the solder placed on the first solder bearing portion 32A penetrates axially along the assembly gap between the transition pipe connection section 341 and the branch pipe 2 into the assembly gap between the inner peripheral wall of the branch pipe bushing 32 and the outer peripheral wall of the branch pipe 2 to form a first brazing layer. In this structure, although the first solder bearing portion 32A is not directly formed on the branch pipe bushing 32, the branch pipe bushing 32 extending out of the adapter hole 311 also separates the two solder bearing portions 32A, 32B in the axial direction, thereby realizing the directional guidance of the brazing solder.

[0076] Figure 1The refrigerant distributor provided by this embodiment is shown as follows. Among them, the distributor body 1 has a structure that integrates reflection and mixing. A partition plate 4 is arranged inside the distributor body 1. An area of the partition plate 4 opposite to the main pipe 7 forms a concave cavity 401 with an opening facing the main pipe 7, and the partition plate 4 at the concave cavity 401 bulges and extends towards the side where the branch pipes 2 are located. The partition plate 4 divides the inner cavity of the distributor body 1 into a reflection and mixing area 101 near the side where the main pipe 7 is located and including the concave cavity 401, and a mixing and distribution area 102 near the branch pipe side. A plurality of partition holes 41 are formed on the partition plate 4 and are distributed in a ring around the axis of the distributor body 1 and communicate the reflection and mixing area 101 and the mixing and distribution area 102. The plurality of partition holes 41 are configured to correspond to the plurality of branch pipes 2 one by one, and when projected axially along the distributor body 1, the plurality of partition holes 41 are located on the partition plane outside the main pipe 7. However, the present invention does not make any limitation on the structure of the distributor body. The refrigerant distributor provided by this embodiment can also adopt a distributor body with other structures, such as Figures 17 to 30 shown as follows.

[0077] In Figure 17 , two-stage jet reflection and mixing components 5 are arranged inside the distributor body 1. The two-stage jet reflection and mixing components 5 include a first-stage reflection and mixing plate 51, a second-stage jet orifice plate 52, and a second-stage reflection and mixing plate 53 that are sequentially and spaced apart along the refrigerant flow direction in the inner cavity of the distributor body 1. Among them, the first-stage reflection and mixing plate 51 is distributed opposite to the main pipe 7 to reflect and mix the refrigerant injected into the main pipe 7, and a plurality of flow holes 511 are formed on the first-stage reflection and mixing plate 51. The second-stage jet orifice plate 52 and the first-stage reflection and mixing plate 51 enclose a jet cavity 501, and a second-stage jet hole 521 is formed on the second-stage jet orifice plate 52. The refrigerant reflected and mixed by the first-stage reflection and mixing plate 51 is collected in the jet cavity 501 through the flow holes 511 and is jetted to the second-stage reflection and mixing plate 53 through the second-stage jet hole 521. The second-stage reflection and mixing plate 53 is distributed opposite to the second-stage jet hole 521 and has a plurality of diversion holes 531 with the same number as the branch pipes 2. Each diversion hole 531 is substantially coaxial with the corresponding branch pipe 2. The second-stage reflection and mixing plate 53 reflects and mixes the refrigerant injected by the second-stage jet hole 521, and then distributes it to the plurality of branch pipes 2 through the diversion holes 531. Specifically, in Figure 17 , the part of the first-stage reflection and mixing plate 51 opposite to the main pipe 7 bulges and extends towards the side where the second-stage jet orifice plate 52 is located to form a first-stage reflection concave cavity 510 with an opening facing the liquid outlet end of the main pipe 7, and a second-stage reflection concave cavity 530 is formed on the second-stage reflection and mixing plate 53. However, the present invention does not make any limitation on this.

[0078] Figure 18 It is basically the same as the structure of Figure 17 , the difference is that: Figure 18The shown divider body 1 also includes a chamber partition plate 54 located on the downstream side of the primary reflection mixing plate 51. The chamber partition plate 54 divides the jet chamber 501 into an upstream chamber 5011 and a downstream chamber 5012. The upstream chamber 5011 is an annular chamber surrounding the primary reflection concave cavity 510. The downstream chamber 5012 is connected to the secondary jet hole 521. The chamber partition plate 54 is formed with partition plate through holes that are staggered with the multiple flow holes 511 (due to the viewing angle, Figure 18 not shown).

[0079] exist Figure 19 In the embodiment, a flat plate partition 4' and a conical flow channel forming member 6 are formed in the distributor body 1, and a plurality of partition holes 41 are formed on the flat plate partition 4'. Figure 20 and Figure 19 The structure is basically the same, the difference is: Figure 20 In the embodiment, the flow channel forming member 6 is a spacer having a substantially constant cross section along its extending direction. Figure 21 In the embodiment, only a flat plate partition 4' is formed in the main body 1 of the divider. Figure 22 In the embodiment, only the flow channel forming member 6 is formed in the distributor body 1.

[0080] Figure 23 The middle divider body 1 is a jack-type structure; Figure 24 The middle divider body 1 is a Venturi structure; Figure 25 The middle divider body 1 is a Venturi tube structure; Figure 26 The middle divider body 1 is a reflective structure; Figure 27 The middle distributor body 1 is an impeller structure; Figure 28 The middle divider body 1 is a conical structure. Figure 29 The middle manifold body 1 is a perforated plate structure. The present invention will not enumerate the specific structure of the manifold body one by one. Existing manifolds that can realize refrigerant distribution or collection can be matched with the adapter assembly provided in this embodiment, and then quickly assembled to multiple heat exchange tubes distributed in a matrix on the shell and tube heat exchanger.

[0081] exist Figure 1 as well as Figures 17 to 29 In the provided refrigerant manifold, the plurality of branch pipes are distributed in the manifold body 1 in a one-circle or multi-circle annular array. However, the present invention does not impose any limitation on this. Figure 30 The ends of the multiple branch pipes 2 distributed in a single row on the tubular distributor are converted into a columnar distribution to match the heat exchange tubes installed in the shell and tube heat exchanger.

[0082] Corresponding to the refrigerant distributor 800 provided in this embodiment, this embodiment also provides a processing method of the refrigerant distributor 800. Specifically, Figure 31 As shown, the method includes:

[0083] Step S10: Process the adapter plate 31 and multiple branch pipe bushings 32: On the adapter plate 31, process multiple adapter holes 311 that are in one-to-one correspondence with the ports of the rear heat exchange pipes 902 and are distributed in a determinant pattern, and the diameters of at least some of the adapter holes 311 are larger than the outer diameter of the corresponding branch pipes 2. Specifically, in this embodiment, it is set that the diameters of all the adapter holes 311 are equal and are larger than the outer diameter of the corresponding branch pipes 2. However, the present invention does not make any limitation in this regard.

[0084] Step S20: Bend the multiple branch pipes 2 on the refrigerant manifold 800 so that the end of each branch pipe 2 basically faces the corresponding adapter hole 311 on the adapter plate 31.

[0085] Step S30: Assemble the adapter plate 31 to the multiple branch pipes 2 so that each branch pipe 2 basically coaxially penetrates into the corresponding adapter hole 311, and a positioning and adjustment gap 3110 that is basically coaxial with the adapter hole 311 and is annular is formed between the outer peripheral wall of the adapter hole 311 and the branch pipe 2. The setting of the positioning and adjustment gap 3110 provides an adjustment space for synchronously assembling multiple branch pipes 2 with different bending states into the corresponding adapter holes 311, and solves the assembly difficulty problems caused by many factors such as insufficient bending space, low bending accuracy, and cumulative assembly errors.

[0086] Step S40: Sleeve the branch pipe bushings 32 onto the corresponding branch pipes 2 from the ends of the branch pipes 2 and embed them in the positioning and adjustment gap 3110. After assembly, there are two solder-bearing parts 32A and 32B that are isolated from each other based on the peripheral wall of the branch pipe bushing 32 at the location of each branch pipe bushing 32. The first solder-bearing part 32A only communicates with the assembly gap between the inner peripheral wall of the branch pipe bushing 32 and the outer peripheral wall of the branch pipe 2, and the second solder-bearing part 32B only communicates with the assembly gap between the outer peripheral wall of the branch pipe bushing 32 and the hole wall of the adapter hole 311.

[0087] Step S50: Place the solder at the two solder-bearing parts 32A and 32B at the location of each branch pipe bushing 32, and use a tunnel furnace to perform one-time brazing on the multiple branch pipes 2, branch pipe bushings 32, and adapter plate 31. In this embodiment, since a branch pipe bushing 32 is embedded in each adapter hole 311, the brazing solder is placed at the two solder-bearing parts 32A and 32B at the location of each branch pipe bushing 32 to achieve the sealed welding of each branch pipe 2 and the corresponding adapter hole 311. However, the present invention does not make any limitation in this regard. In other embodiments, when only some of the adapter holes on the adapter assembly for the refrigerant manifold are embedded with branch pipe bushings, for the adapter holes without branch pipe bushings, the solder is sleeved on the outside of the branch pipe and placed on the surface of the adapter plate near the adapter hole; during brazing, the solder penetrates into the assembly gap between the outer peripheral wall of the branch pipe and the hole wall of the adapter hole to directly seal and weld the branch pipe and the corresponding adapter hole.

[0088] In the processing method of the refrigerant manifold provided in this embodiment, the adjustment space provided by the positioning adjustment gap 3110 enables multiple branch pipes 2 to be synchronously assembled into the corresponding adapter holes 311. To further reduce the assembly difficulty, this embodiment sets step S30 to include:

[0089] Step S301, machining the positioning card board 8: Based on the positions of the adapter holes 311 in adjacent two rows or two columns on the adapter board 31, machine two rows or two columns of open positioning grooves 81 located at the edge of the positioning card board 8 and in a partial arc shape on the positioning card board 8, and the radius of the open positioning grooves 81 is basically close to the outer diameter of the branch pipe 2, specifically as Figure 33 shown.

[0090] Step S302, assembling the positioning card board 8: Snap multiple positioning card boards 8 into the space between adjacent two rows or two columns of branch pipes 2 one by one and make the multiple positioning card boards 8 basically in the same plane. Based on the multiple open positioning grooves 81 on each positioning card board 8, adjust the distance between any two branch pipes 2 in adjacent two rows or two columns so that the end of each branch pipe 2 is basically coaxial with the corresponding adapter hole 311, as Figure 34 and Figure 35 shown.

[0091] Step S304, based on the positioning of the multiple positioning card boards 8, assemble the adapter board 31 into the multiple branch pipes 2 so that each branch pipe 2 is basically coaxially inserted into the corresponding adapter hole 311, as Figure 34 and Figure 35 shown.

[0092] Step S305, remove the multiple positioning card boards 8.

[0093] In this embodiment, the distance between adjacent two rows or two columns of branch pipes 2 is adjusted one by one through multiple positioning card boards 8 basically in the same plane to effectively correct the spatial position of the branch pipes 2 after the bent pipe is processed. After adjustment, the ends of each branch pipe can form an axial alignment relationship with the corresponding adapter hole 311, establishing a benchmark for the assembly of the adapter board 31. By setting double-row open positioning grooves 81 at the edge of the positioning card board 8, after the adapter board is installed, only by rotating the positioning card board 8 can non-interference disassembly be achieved, which not only maintains the reliability of the positioning accuracy but also significantly improves the operation convenience.

[0094] Further, step S30 further includes step S304. After assembling the multiple positioning card boards 8, apply a clamping force in the arrangement direction of the multiple positioning card boards 8 so that each branch pipe 2 is closely attached to the groove wall of the open positioning groove 81, thereby further improving the calibration accuracy of the position of the end of the branch pipe 2. Specifically, as Figure 35 and Figure 36 shown, two edge card boards 9 are also distributed on both sides of the multiple positioning card boards 8, and the fixture applies a clamping force by clamping the two edge card boards 9 to clamp the multiple branch pipes 2. However, the present invention does not make any limitation thereto.

[0095] In summary, the adapter assembly for the refrigerant manifold provided by the present invention converts the end positions of multiple branch pipes distributed in a ring or a single row on the refrigerant manifold into a determinant distribution adapted to the ports of the heat exchange pipes through multiple adapter holes distributed in rows and columns on the adapter plate. In addition, by setting the aperture of at least a part of the adapter holes to be larger than the outer diameter of the corresponding branch pipes, a positioning adjustment gap is formed between the adapter holes and the branch pipes to form an assembly adjustment space, so that multiple branch pipes in different bending states can be synchronously aligned during assembly, and finally the unified conversion of the spatial topological structure of the ends of multiple branch pipes is achieved.

[0096] Furthermore, to achieve the seal welding between the branch pipes and the corresponding adapter holes at the positioning adjustment gap, the present invention adopts double safeguard measures: a branch pipe bushing is added inside the positioning adjustment gap to accurately control the assembly gap, ensuring that the multi-layer assembly gap between the branch pipes, the branch pipe bushings, and the adapter holes meets the requirements of the brazing process; on this basis, two mutually separated solder bearing parts are constructed on the circumferential wall of the branch pipe bushing, and the characteristics of their spatial separation are used to form two independent solder penetration paths, so that the brazing solder can penetrate into the assembly gap between the branch pipe and the bushing and the assembly gap between the bushing and the adapter hole respectively. The spatially isolated solder supply path enables each layer of the assembly gap to be filled with brazing solder to form a continuous and dense metallurgical bonding layer. The present invention increases the assembly gap between the adapter holes and the branch pipes, so that multiple branch pipes can be accurately and quickly assembled on the adapter plate, and then the unified conversion of the spatial positions of the ends of multiple branch pipes is realized. On this basis, by setting the branch pipe bushing and two mutually separated solder bearing parts, the seal welding problem between the branch pipes and the adapter holes caused by the increased gap is effectively solved, ensuring that each branch pipe can be reliably seal welded inside the corresponding adapter hole.

[0097] Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in this art can make some changes and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope claimed in the claims.

Claims

1. A refrigerant manifold adapter assembly, characterized in that: Comprising: An adapter plate having a plurality of adapter holes that are hermetically connected to multiple branch pipes on a refrigerant manifold and are distributed in rows and columns. The diameters of at least some of the adapter holes are larger than the outer diameters of the branch pipes to which they are assembled. A positioning and adjusting gap that is substantially coaxial with the adapter holes and annular is formed between the outer peripheral walls of the adapter holes and the branch pipes; At least one branch pipe bushing disposed in an adapter hole whose diameter is larger than the outer diameter of the corresponding branch pipe. The branch pipe bushing is sleeved on the corresponding branch pipe and embedded in the positioning and adjusting gap; Wherein, at each location of each branch pipe bushing, there are two solder bearing parts separated based on the peripheral wall of the branch pipe bushing. The brazing solder at the first solder bearing part directionally penetrates into the assembly gap between the inner peripheral wall of the branch pipe bushing and the outer peripheral wall of the branch pipe to form a first brazing layer, and the brazing solder at the second solder bearing part directionally penetrates into the assembly gap between the outer peripheral wall of the branch pipe bushing and the hole wall of the adapter hole to form a second brazing layer.

2. The adapter assembly for a refrigerant manifold according to claim 1, wherein, The branch pipe bushing includes a bushing connection section whose inner diameter is substantially close to the outer diameter of the corresponding branch pipe and a bushing end section located at one end of the bushing connection section and having an inner diameter larger than the outer diameter of the corresponding branch pipe. The first solder bearing part and / or a guiding part for guiding the outer sleeving of the branch pipe bushing onto the branch pipe are formed at the bushing end section. The first solder bearing part is an inclined inner peripheral wall, an arc inner peripheral wall, or a stepped surface of the bushing end section; Alternatively, a first solder bearing part is formed at the end face of the branch pipe bushing close to the end of the branch pipe, and the first solder bearing part is a flat surface.

3. The adapter assembly for a refrigerant manifold according to claim 2, wherein Bushing end sections are formed at both ends of the branch pipe bushing. The bushing end section far from the end of the branch pipe forms a guiding part, and the first solder bearing part is formed at the inner peripheral wall of the bushing end section at the other end.

4. The adapter assembly for the refrigerant manifold according to claim 2, characterized in that, A bushing end section is formed on one side of the branch pipe bushing far from the end of the branch pipe. The bushing end section forms a guiding part and the first solder bearing part is formed at its inner peripheral wall.

5. The adapter assembly for the refrigerant manifold according to claim 2, characterized in that, An annular space is formed between the inner peripheral wall of the bushing end section where the guiding part is located and the outer peripheral wall of the branch pipe, so that the inner peripheral wall of the bushing end section and the outer peripheral wall of the branch pipe do not contact each other.

6. The adapter assembly for the refrigerant manifold according to claim 1, wherein, One end of the branch pipe bushing extends out of the adapter hole, and a second solder bearing part is formed on the surface of the adapter plate at or near the adapter hole.

7. The adapter assembly for a refrigerant manifold according to claim 6, wherein, An adapter hole guiding section with a diameter larger than the outer diameter of the branch pipe bushing is formed on the side of the adapter hole close to the end of the branch pipe. The second solder bearing part is formed at the inclined inner peripheral wall, rounded inner peripheral wall, and stepped surface of the adapter hole guiding section; Alternatively, the adapter hole is a cylindrical hole with a substantially uniform inner diameter, and a second solder bearing part is formed on the surface of the adapter plate near the adapter hole, and the second solder bearing part is a flat surface.

8. The adapter assembly for a refrigerant manifold according to claim 6, characterized in that, One side of the branch pipe bushing close to the end of the branch pipe extends out of the adapter hole. The outer diameter of the branch pipe bushing is smaller than the inner diameter at the port of the rear heat exchange pipe to be connected. The branch pipe bushing and the corresponding end of the branch pipe together serve as a connection end to be inserted into the port of the rear heat exchange pipe.

9. The adapter assembly for a refrigerant manifold according to claim 1, characterized in that The adapter assembly for the refrigerant manifold further includes a pipe end transition pipe that is hermetically welded to the adapter hole or the end of the branch pipe. The outer diameter of the pipe end transition pipe is larger than the outer diameter of the end of the branch pipe to be inserted into the port of the rear heat exchange pipe.

10. A refrigerant manifold, characterized in that, The refrigerant manifold distributes refrigerant into each heat exchange pipe in the heat exchange assembly or collects the refrigerant in each heat exchange pipe of the heat exchange assembly. The refrigerant manifold includes: A manifold body; Multiple branch pipes are provided on the manifold body, and the multiple branch pipes are distributed in at least one circle of annular array or a single row. The adapter assembly for the refrigerant manifold according to any one of claims 1 to 9.

11. A heat exchange device, characterized in that, It includes the refrigerant manifold according to claim 9 and a heat exchange assembly. The heat exchange assembly includes a tube sheet and multiple heat exchange tubes connected to the tube sheet in a determinant manner. The outer periphery of the adapter plate in the adapter assembly for the refrigerant manifold is hermetically welded to the tube sheet to form a sealed cavity therebetween, and the end of each branch pipe and / or the corresponding branch pipe bushing is inserted into the corresponding heat exchange tube port at the sealed cavity.

12. A method for processing the refrigerant distributor according to claim 10, characterized in that, It includes: Processing the adapter plate and at least one branch pipe bushing: processing multiple adapter holes on the adapter plate that are distributed in a determinant manner corresponding one by one to the rear heat exchange tube ports, and at least a part of the diameters of the adapter holes are larger than the outer diameters of the branch pipes assembled therewith. Bending the multiple branch pipes on the refrigerant manifold so that the end of each branch pipe basically faces the corresponding adapter hole on the adapter plate. Assembling the adapter plate on the multiple branch pipes of the refrigerant manifold so that each branch pipe basically coaxially penetrates into the corresponding adapter hole. For the adapter holes with diameters larger than the outer diameters of the corresponding branch pipes, a positioning and adjusting gap that is basically coaxial with the adapter hole and annular is formed between the adapter hole and the outer peripheral wall of the branch pipe. Inserting the branch pipe bushing into the corresponding branch pipe from the end of the branch pipe and embedding it in the positioning and adjusting gap. After assembly, there are two solder bearing parts isolated from each other based on the circumferential wall of the branch pipe bushing at each location where the branch pipe bushing is located. The first solder bearing part only communicates with the assembly gap between the inner circumferential wall of the branch pipe bushing and the outer peripheral wall of the branch pipe, and the second solder bearing part only communicates with the assembly gap between the outer circumferential wall of the branch pipe bushing and the hole wall of the adapter hole. Placing solder at the two solder bearing parts where the branch pipe bushing is located and at other adapter holes where no branch pipe bushing is provided, and performing one-time brazing on the multiple branch pipes, the branch pipe bushings, and the adapter plate using a tunnel furnace.

13. The processing method of the refrigerant manifold according to claim 12, wherein The step of assembling the adapter plate on the multiple branch pipes of the refrigerant manifold includes: Processing the positioning card plate: Based on the positions of the adjacent two rows or two columns of adapter holes on the adapter plate, processing two rows or two columns of open positioning slots located at the edge of the positioning card plate and in a partial arc shape on the positioning card plate, and the radius of the open positioning slots is basically close to the outer diameter of the branch pipe. Assembling the positioning card plate: Sequentially snapping multiple positioning card plates between adjacent two rows or two columns of branch pipes and making the multiple positioning card plates basically in the same plane. Adjusting the distance between any two branch pipes in adjacent two rows or two columns based on the multiple open positioning slots on each positioning card plate so that the end of each branch pipe is basically coaxial with the corresponding adapter hole. Based on the positioning of the multiple positioning card plates, assembling the adapter plate into the multiple branch pipes so that each branch pipe basically coaxially penetrates into the corresponding adapter hole. After that, removing the multiple positioning card plates.

14. The processing method of the refrigerant manifold according to claim 13, characterized in that, The step of assembling the adapter plate on the multiple branch pipes of the refrigerant manifold further includes: After assembling the multiple positioning card plates, applying a clamping force in the arrangement direction of the multiple positioning card plates so that each branch pipe tightly adheres to the groove wall of the open positioning slot; after that, assembling the adapter plate into the multiple branch pipes.

Images