Double-layer micro-channel condenser core inlet and outlet refrigerant distribution structure

Abstract

The utility model discloses a double -deck micro -channel condenser core body import and export refrigerant distribution structure, including the two layer micro -channel core body of upper and lower stack arrangement, the micro -channel core body includes two header, the flat pipe of being arranged between two header, the liquid inlet and the liquid outlet of being arranged in one end of two header, still include two respectively set up in the liquid inlet and the liquid outlet outside of two header two ends pressure block, the inboard of pressure block is equipped with two limit slot, and the two header of upper and lower stack arrangement is installed in limit slot, still be equipped with the refrigerant shunt channel of communication respectively with two liquid inlet or liquid outlet in pressure block. Can carry out quick assembly and stack after to the two independent small core body micro -channel condenser and form integrated structure, assembly and installation, and the liquid inlet and outlet pipe single.

Description

Technical Field

[0001] This utility model relates to the technical field of condensers, specifically to a refrigerant distribution structure for the inlet and outlet of a double-layer microchannel condenser core. Background Technology

[0002] Microchannel condensers are a crucial component of air conditioning systems, determining the air conditioner's operating capacity. Microchannel products primarily consist of manifolds, flat tubes, fins, and inlet / outlet pipes. The manifolds collect and distribute the refrigerant, and their flow paths are easily designed. The microchannel flat tubes are the core of this type of condenser, available in various widths and thicknesses. The fins typically have a louvered structure. The condenser's capacity is mainly determined by its heat dissipation area. To maximize heat dissipation area within a limited space, the width of the flat tubes is usually increased. To accommodate wider flat tubes, the diameter of the manifolds must be increased. However, this design presents the following problems: 1. As the diameter of the manifold increases, thicker walls must be used to ensure the basic pressure resistance of the manifold, which increases material costs. 2. As the diameter of the manifold increases, the proportion of heat exchange space occupied by the manifold becomes larger and larger, thereby reducing the heat dissipation area of ​​the condenser and affecting the heat exchange performance. 3. As the diameter of the manifold increases, the internal volume of the condenser expands dramatically, increasing the amount of refrigerant required and thus increasing the material cost of the air conditioner. 4. In terms of the selection of flat tubes, in order to achieve the basic pressure resistance and other properties of flat tubes, flat tubes with higher weight per meter were used, which increased the material cost; 5. The sharp increase in product weight requires more heat to be absorbed during furnace brazing, which increases processing costs.

[0003] To maximize heat dissipation area within a limited space without increasing the diameter of the manifold, another approach is to use a double-layer microchannel condenser. However, current double-layer microchannel condensers require the condensate to first enter the manifold of one layer before being distributed. This requires a specialized double-layer microchannel condenser structure and relies on connecting pipes to distribute the refrigerant between the upper and lower layers, which can easily lead to uneven internal flow and high flow resistance. Conventional microchannel condensers cannot be directly stacked. If conventional microchannel condensers are stacked to create a dual-condensation effect, the inlet and outlet pipes must be independent, requiring the use of structures such as three-way valves for assembly, resulting in a complex structure. Furthermore, for the same volume, the heat exchange of a large-core condenser is less than that of a double-layer small-core microchannel condenser, which in turn is less than the heat exchange of two independent small-core microchannel condensers. Therefore, a refrigerant distribution structure is needed that allows stacking two independent small-core microchannel condensers and assembling them through a single inlet and outlet structure. Summary of the Invention

[0004] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a double-layer microchannel condenser core inlet and outlet refrigerant distribution structure, which can quickly assemble and stack two independent small core microchannel condensers to form an integrated structure, with low assembly and installation cost and a single inlet and outlet liquid pipeline.

[0005] To address the aforementioned technical problems, the objective of this application is achieved through the following technical solution: A refrigerant distribution structure for a double-layer microchannel condenser core includes two stacked microchannel cores. Each microchannel core includes two manifolds, several flat tubes between the two manifolds, an inlet and an outlet at both ends of one of the manifolds, and two pressure blocks located outside the inlet and outlet of the two manifolds respectively. The inner side of each pressure block has two limiting grooves, and the two stacked manifolds are installed in the limiting grooves. The pressure block also has refrigerant distribution channels that communicate with the two inlets or outlets respectively.

[0006] Preferably, the refrigerant distribution channel includes a cylindrical groove vertically disposed on the pressure block and a through hole disposed in the two limiting grooves and communicating with the cylindrical groove, wherein the outer end of the through hole is connected to the liquid inlet or liquid outlet.

[0007] Preferably, the top of the cylindrical groove is provided with a coaxially arranged sink.

[0008] Preferably, the inlet and outlet are located on the arc-shaped side of the manifold, and the limiting groove is an arc-shaped groove.

[0009] Preferably, the pressure block has a cuboid structure, and the top of the pressure block is provided with an outwardly protruding mounting block, and the mounting block is provided with a positioning hole.

[0010] Preferably, the manifold for mounting the pressure block extends outward at both ends to form assembly sections, and the inlet and outlet are respectively located inside the assembly sections at both ends.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: Two independent microchannel cores are combined into a double-layer structure using a compression block with refrigerant distribution channels. The microchannel cores can directly utilize existing structures, eliminating the need for connecting pipes to distribute refrigerant between the upper and lower layers. This avoids issues like uneven internal flow, high flow resistance, and the problem of having two inlet / outlet pipes simultaneously. In limited space, when aiming for a larger heat dissipation area, this method offers better heat exchange performance, lower material and processing costs, and more economical refrigerant filling compared to increasing the overall size of the microchannel core. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the part of the present invention that is not pressed onto the pressure block; Figure 3 This is a schematic diagram of the structure of the pressure block in this utility model; In the diagram: 1. Microchannel core; 11. Manifold; 12. Flat tube; 13. Liquid inlet; 14. Liquid outlet; 15. Assembly section; 2. Pressing block; 21. Limiting groove; 22. Refrigerant distribution channel; 221. Cylindrical groove; 222. Through hole; 23. Settling tank; 24. Mounting block; 25. Positioning hole. Detailed Implementation

[0013] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0014] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0015] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0016] like Figures 1-3 As shown, a refrigerant distribution structure for a double-layer microchannel condenser core includes two stacked microchannel cores 1. Each microchannel core 1 includes two manifolds 11, several flat tubes 12 disposed between the two manifolds 11, an inlet 13 and an outlet 14 disposed at both ends of one of the manifolds 11, and two pressure blocks 2 disposed outside the inlet 13 and outlet 14 respectively at both ends of the two manifolds 11. The inner side of the pressure block 2 is provided with two limiting grooves 21, and the two stacked manifolds 11 are installed in the limiting grooves 21. The pressure block 2 is also provided with refrigerant diversion channels 22 that are respectively connected to the two inlet 13 or outlet 14.

[0017] In the actual production process, two independent microchannel cores 1 with small core structures are first assembled. Then, the two assembled microchannel cores 1 are stacked one on top of the other. Finally, two pressure blocks 2 with refrigerant diversion channels 22 are installed on the inlet 13 and outlet 14 by welding. This allows the refrigerant to be injected into the two inlets 13 and simultaneously drawn out and merged from the two outlets 14 through the refrigerant diversion channels 22 in the pressure blocks 2. After installation, the upper and lower manifolds 11 are embedded in the two limiting grooves 21 respectively. The limiting grooves 21 serve to limit the movement and increase the contact surface and seal the connection. This allows the refrigerant delivery pipe and return pipe to be connected to the two refrigerant diversion channels 22 to complete the refrigerant delivery. When combining two independent microchannel cores 1 to form a double-layer structure, the existing microchannel core 1 structure can be directly used. The refrigerant entry and exit no longer require connecting pipes to distribute the refrigerant between the upper and lower layers, thus avoiding problems such as uneven internal flow and high flow resistance, as well as the issue of having two inlet and outlet pipes simultaneously. In a limited space, to achieve a larger heat dissipation area, this method offers better heat exchange performance, lower material and processing costs, and more economical refrigerant filling compared to increasing the overall size of the microchannel core 1.

[0018] A further improvement is that the refrigerant distribution channel 22 includes a cylindrical groove 221 vertically disposed on the pressure block 2 and a through hole 222 disposed in the two limiting grooves 21 and communicating with the cylindrical groove 221, wherein the outer end of the through hole 222 is connected to the liquid inlet 13 or the liquid outlet 14.

[0019] The ends of the condensate delivery pipe and return pipe are installed in the cylindrical groove 221, while the outer end of the through hole 222 is connected to the liquid inlet 13 or the liquid outlet 14. When the refrigerant flows in from the delivery pipe, it first enters the cylindrical groove 221, and then flows into the through hole 222 through the cylindrical groove 221. It then flows into the two microchannel cores 1 through the two through holes 222. The condensate in the two microchannel cores 1 is then injected into the through hole 222 through the outlet 14, and flows back into the cylindrical groove 221 through the through hole 222 before returning to the refrigerant return pipe. The entire refrigerant distribution channel 22 has a simple structure and is easy to process. It only requires drilling a cylindrical groove 221 first, and then drilling two through holes 222 in the two limiting grooves 21 to connect with the cylindrical groove 221. When injecting condensate, the two microchannel cores 1 can be injected separately without forming an internal through flow. When connecting with the refrigerant pipe, it is no longer necessary to use a three-way valve. The overall structure has better stability, the connection method is simpler, and the assembly is more convenient.

[0020] A further improvement is made in that the top of the cylindrical groove 221 is provided with a coaxially arranged sink 23.

[0021] To facilitate quick connection of condensate delivery pipelines, the optimal solution is to use quick couplings. Therefore, to facilitate the installation of quick couplings, a recess 23 is formed at the top of the cylindrical groove 221 specifically for fixing quick couplings. During assembly, only one end of the quick coupling needs to be pre-installed into the recess 23. When connecting pipelines later, disassembly and assembly are more convenient. The recess 23 and the quick coupling can be connected by adhesive, threaded structure, or interference fit.

[0022] A further improvement is that the inlet 13 and the outlet 14 are located on the arc-shaped side of the manifold 11, and the limiting groove 21 is an arc-shaped groove.

[0023] During assembly, the inlet 13 and outlet 14 are opened on the arc-shaped side of the manifold 11. After they are combined with the arc-shaped inwardly recessed limiting groove 21, the contact surface is larger, the positioning effect is better, and the sealing performance is better after welding. The bottom of the arc-shaped limiting groove 21 and the cylindrical groove 221 partially penetrate to form a through hole 222, which makes the thickness of the entire pressure block 2 thinner.

[0024] A further improvement is made in that the pressure block 2 has a cuboid structure, and the top of the pressure block 2 is provided with an outwardly protruding mounting block 24, and the mounting block 24 is provided with a positioning hole 25.

[0025] The protruding mounting block 24 facilitates the installation of the positioning hole 25, thereby enabling the double-layer microchannel condenser core to achieve a better fixing effect during installation.

[0026] A further improvement is that the two ends of the manifold 11 used to install the pressure block 2 extend outward to form assembly sections 15, and the liquid inlet 13 and the liquid outlet 14 are respectively located inside the assembly sections 15 at both ends.

[0027] After the two ends of the manifold 11 extend outward to form the assembly section 15, the installation position of the pressure block 2 can be located between the two manifolds 11, so as not to increase the maximum width of the entire microchannel core 1, while ensuring the maximum length of the flat tube 12.

[0028] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A refrigerant distribution structure for a double-layer microchannel condenser core, comprising two stacked microchannel cores (1), wherein each microchannel core (1) includes two manifolds (11), a plurality of flat tubes (12) disposed between the two manifolds (11), and an inlet (13) and an outlet (14) disposed at both ends of one of the manifolds (11), characterized in that: It also includes two pressure blocks (2) located outside the liquid inlet (13) and liquid outlet (14) at both ends of the two manifolds (11), respectively. The inner side of the pressure block (2) is provided with two limiting grooves (21), and the two manifolds (11) stacked on top of each other are installed in the limiting grooves (21). The pressure block (2) is also provided with a refrigerant diversion channel (22) that is connected to the two liquid inlets (13) or liquid outlets (14) respectively.

2. The dual-layer microchannel condenser core inlet and outlet refrigerant distribution structure of claim 1, wherein: The refrigerant distribution channel (22) includes a cylindrical groove (221) vertically disposed on the pressure block (2) and a through hole (222) disposed in the two limiting grooves (21) and communicating with the cylindrical groove (221). The outer end of the through hole (222) is connected to the liquid inlet (13) or liquid outlet (14).

3. A dual-layer microchannel condenser core inlet and outlet refrigerant distribution structure according to claim 2, characterized in that: The top of the cylindrical groove (221) is provided with a coaxially arranged sink (23).

4. The dual-layer microchannel condenser core inlet and outlet refrigerant distribution structure of claim 1, wherein: The inlet (13) and outlet (14) are located on the arc-shaped side of the manifold (11), and the limiting groove (21) is an arc-shaped groove.

5. The dual-layer microchannel condenser core inlet and outlet refrigerant distribution structure of claim 1, wherein: The pressure block (2) has a cuboid structure. The top of the pressure block (2) is provided with an outwardly protruding mounting block (24), and the mounting block (24) is provided with a positioning hole (25).

6. A dual-layer microchannel condenser core inlet and outlet refrigerant distribution structure in accordance with claim 1, wherein: The manifold (11) used for installing the pressure block (2) extends outward at both ends to form assembly sections (15), and the liquid inlet (13) and liquid outlet (14) are respectively located inside the assembly sections (15) at both ends.

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