Liquid dispenser and heat exchanger comprising same

Abstract

A liquid dispenser (200) and a heat exchanger (100) comprising same. The liquid dispenser (200) comprises a tube body (210), capillary tubes (220), and a fixing member (230). The tube body (210) is provided with an inlet section (211) and a connecting section (212) which are communicated with each other. The end of the inlet section (211) distant from the connecting section (212) is an inlet (2110). The plurality of capillary tubes (220) are inserted into the connecting section (212). The end of each capillary (220) located at the connecting section (212) is communicated with the inlet (2110). The fixing member (230) is disposed in the connecting section (212). A plurality of separation cavities (232) are formed between the fixing member (230) and the inner wall of the connecting section (212). The plurality of capillary tubes (220) are arranged in one-to-one correspondence with the plurality of separation cavities (232). One end of each capillary (220) is located in a corresponding separation cavity (232). Any two adjacent capillary tube (220) are separated by means of the fixing member (230).

Description

Liquid separator and heat exchanger having the same

[0001] Related applications

[0002] This application claims priority to Chinese patent applications with application number 202420552129.2, filed on March 20, 2024, titled “Liquid separator”, application number 202410324800.2, filed on March 20, 2024, titled “Liquid separator and heat exchanger having the same”, and application number 202420559797.8, filed on March 20, 2024, titled “Heat exchanger”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of refrigeration technology, and in particular to a liquid separator and a heat exchanger having the same. Background Art

[0004] Liquid distributors are commonly used in air conditioning systems to evenly distribute refrigerant fluid within heat exchangers. These distributors typically consist of a distributor head and multiple capillary tubes. One end of the distributor head connects to the refrigerant pipeline, while the other end connects to the capillary tubes, distributing the refrigerant fluid from the refrigerant pipeline to the capillary tubes.

[0005] In the related art, when processing a dispenser, the ends of multiple capillaries are first inserted into a connected dispense head, and then the connected capillaries and the dispense head are welded. The spacing between the multiple capillaries in the connected dispense head is not fixed. During welding, the capillaries will be pulled closer to each other due to gravity, resulting in a too small spacing between the capillaries. The capillary effect between adjacent capillaries is strong, and the solder is adsorbed on the capillaries after melting, causing welding adhesion between the capillaries located outside the dispense head, thereby causing material waste and increasing production costs. Summary of the Invention

[0006] Based on this, the present application provides a liquid separator and a heat exchanger having the same in order to solve the above technical problems.

[0007] A liquid separator, the liquid separator comprising a tube body, the tube body having an inlet section and a connecting section that are interconnected, the inlet section being provided with an inlet at one end away from the connecting section; the liquid separator also comprising capillaries and a fixing piece, wherein a plurality of capillaries are provided, the plurality of capillaries being inserted in the connecting section, the capillaries being located at one end of the connecting section and being connected to the inlet; the fixing piece being provided in the connecting section, the fixing piece and the inner wall of the connecting section forming a plurality of separation cavities, the plurality of capillaries being provided in a one-to-one correspondence with the plurality of separation cavities, one end of the capillaries being located in the separation cavities, any two adjacent capillaries being separated by the fixing piece, the fixing piece, the plurality of capillaries and the connecting section being connected and fixed, and sealing the end of the connecting section away from the inlet section.

[0008] The present application also provides a heat exchanger, comprising a liquid separation part and a heat exchange part, the liquid separation part comprising a liquid separator, which is the liquid separator described above; the heat exchange part has a plurality of heat exchange tubes arranged at intervals along a first direction, and one end of each of the heat exchange tubes is connected to one end of the capillary of the liquid separator away from the connecting section of the tube body.

[0009] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered to limit the scope of the disclosed inventions, the presently described embodiments and / or examples, and any of the best modes currently understood for these inventions.

[0011] FIG1 shows a schematic structural diagram of a liquid dispenser provided in an embodiment of the present application.

[0012] FIG2 shows a side view of a liquid dispenser provided in an embodiment of the present application.

[0013] FIG3 shows a side view of a liquid dispenser provided in an embodiment of the present application.

[0014] FIG4 shows a cross-sectional view of a liquid dispenser provided in an embodiment of the present application.

[0015] FIG5 shows a schematic structural diagram of a liquid dispenser provided in an embodiment of the present application.

[0016] FIG6 is a perspective view of an embodiment of a liquid dispenser provided in the present application.

[0017] FIG7 is a cross-sectional view of the liquid dispenser in FIG6 of the present application.

[0018] FIG8 is a cross-sectional view of the liquid dispenser in FIG6 of the present application from another angle.

[0019] FIG9 is a cross-sectional view of an embodiment of a liquid dispenser provided in the present application.

[0020] FIG10 is a three-dimensional view of the throttling member in FIG6 of the present application.

[0021] FIG11 is a cross-sectional view of the throttling member in FIG6 of the present application.

[0022] FIG12 is a three-dimensional view of the throttling member in FIG9 of the present application.

[0023] FIG13 is a cross-sectional view of the throttling member in FIG9 of the present application.

[0024] FIG14 shows a front view of a heat exchanger provided in an embodiment of the present application.

[0025] FIG15 shows a schematic structural diagram of a heat exchanger provided in an embodiment of the present application.

[0026] FIG. 16 shows a front view of the heat exchanger in FIG. 15 of the present application.

[0027] FIG. 17 shows a top view of the heat exchanger in FIG. 15 of the present application.

[0028] FIG. 18 shows a side view of the heat exchanger in FIG. 15 of the present application.

[0029] The symbols in the figure represent the following meanings: 100, heat exchange tube; 200, liquid distributor; 210, tube body; 211, inlet section; 212, connecting section; 2121, connecting part; 2122, matching part; 213, bending part; 2110, inlet; 2120, outlet; 14, limit assembly; 214, positioning protrusion; 215, transition section; 220, capillary; 221, plug section; 222, bending section; 230, fixing member; 231, fixing arm; 232, partition chamber; 2 40. Throttle member; 242. Throttle hole; 241. Positioning portion; 243. Positioning groove; 244. Rounded corner; 245. Connecting section; 246. Throttle section; 201. First liquid distributor; 2011. First tube body; 2012. First capillary tube; 202. Second liquid distributor; 2021. Second tube body; 2022. Second capillary tube; 300. Connector; 310. Transfer tube; 3101. First transfer interface; 3102. Second transfer interface. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0035] 1-3 , the present application provides a liquid dispenser 200 , which includes a tube body 210 , a capillary tube 220 and a fixing member 230 . In which, the tube body 210 has an inlet section 211 and a connecting section 212 that are connected to each other. An inlet 2110 is provided at the end of the inlet section 211 away from the connecting section 212. A plurality of capillaries 220 are provided, and the plurality of capillaries 220 are inserted in the connecting section 212. The capillary 220 is located at one end of the connecting section 212 and is connected to the inlet 2110. A fixing member 230 is provided in the connecting section 212. The fixing member 230 and the inner wall of the connecting section 212 form a plurality of separation cavities 232. The plurality of capillaries 220 are arranged in a one-to-one correspondence with the plurality of separation cavities 232. One end of the capillary 220 is located in the separation cavity 232. Any two adjacent capillaries 220 are separated by the fixing member 230. The fixing member 230, the plurality of capillaries 220 and the connecting section 212 are connected and fixed, and the end of the connecting section 212 away from the inlet section 211 is blocked.

[0036] When multiple capillaries 220 are inserted into the connecting section 212, two adjacent capillaries 220 are separated by the fixing piece 230, which can prevent the two adjacent capillaries 220 from getting too close under the action of gravity, so that there is a certain distance between the two adjacent capillaries 220, thereby reducing the capillary phenomenon between the outer walls of the capillary tube 220, and preventing the molten flux from flowing along the capillary tube 220 under the capillary action when the capillary tube 220 is welded to the tube body 210, thereby affecting the welding effect, ensuring the stability of the connection between the capillary tube 220 and the tube body 210, and preventing the capillary tube 220 from welding and sticking, thereby ensuring the service life of the capillary tube 220. Compared with the traditional technical solution, the technical solution provided by the present application does not need to extend the length of the capillary tube 220, can avoid material waste, and reduce production costs.

[0037] Compared with the traditional technical solutions, the technical solution provided by the present application does not need to extend the length of the capillary 220, which can avoid material waste and reduce production costs.

[0038] It is understandable that the specific number of capillaries 220 can be set according to needs, and can be 2, 3, 4 or more, and is not limited here.

[0039] Referring to FIG2 , specifically, the fixing member 230 includes a plurality of fixing arms 231 , each having a connecting end and a free end disposed oppositely. The connecting ends of the plurality of fixing arms 231 are interconnected, and the plurality of fixing arms 231 are spaced apart circumferentially around the connecting section 212 and form a plurality of separation chambers 232 with the inner wall of the connecting section 212. With this arrangement, when the capillaries 220 are inserted into the connecting section 212, the fixing arms 231 can prevent two adjacent capillaries 220 from approaching each other, thereby weakening the capillary effect between the two adjacent capillaries 220 and avoiding welding adhesion. Furthermore, by providing the connecting ends of the plurality of fixing arms 231 to be interconnected, the capillaries 220 are located between two adjacent fixing arms 231 , separating the adjacent capillaries 220 and allowing the plurality of capillaries 220 to be aggregated together to ensure the liquid separation effect of the liquid dispenser. Specifically, the number of fixing arms 231 can be set to 3, 4, or 5, and can be adjusted according to the application in actual production.

[0040] As shown in Figures 1 and 5, in one embodiment, the fixed arm 231 is a rectangular plate, which can have a separation effect on the capillary 220 and reduce the processing difficulty of the fixing part 230. When welding the capillary 220, the solder can seal the gap between the capillary 220, the fixed arm 231 and the connecting section 212 to prevent refrigerant leakage.

[0041] As shown in Figure 6, in one embodiment, the shape of the side of the fixed arm 231 facing the capillary tube 220 matches the outer peripheral shape of the capillary tube 220, and thus the shape of the inner wall of the partition cavity 232 matches the outer peripheral shape of the capillary tube 220. This arrangement ensures the stability of the capillary tube 220 inserted into the connecting section 212, facilitating welding of the capillary tube 220. It also minimizes the gaps between the capillary tube 220, the fixed arm 231, and the connecting section 212, ensuring the sealing of the tube body 210.

[0042] 5 or 6 , the sidewall of the connecting section 212 includes a connecting portion 2121 and a mating portion 2122 that are interconnected. The inner sidewall of the mating portion 2122 is aligned with the outer sidewall of the capillary tube 220. The cross-sectional shape of the mating portion 2122 along the extension direction matches the cross-sectional shape of the capillary tube 220 along the extension direction. A connecting portion 2121 is provided between two adjacent mating portions 2122. The inner wall of the connecting portion 2121 abuts and is fixedly connected to the fixing member 230. This arrangement can minimize the space inside the connecting section 212, improve the liquid dispensing effect of the tube body 210, and reduce the space occupied by the connecting section 212, which is conducive to miniaturization of the liquid dispenser.

[0043] Specifically in the present application, in the circumferential direction of the connecting section 212, the distance between two adjacent capillaries 220 is greater than 0.5mm and less than 5mm. When the minimum distance between two adjacent capillaries 220 is less than or equal to 0.5mm, the fixing member 230 cannot play the role of separating the two adjacent capillaries 220, and cannot reduce the capillary action between the two adjacent capillaries 220; when the minimum distance between two adjacent capillaries 220 is greater than or equal to 5mm, the minimum distance between the two adjacent capillaries 220 is too large, which easily causes uneven liquid separation. In the present application, by setting the minimum distance between two adjacent capillaries 220 to be greater than 0.5mm and less than 5mm, it is possible to reduce the capillary action between the two adjacent capillaries 220 while ensuring the liquid separation effect of the liquid dispenser. Specifically, the minimum distance between two adjacent capillaries 220 can be set to 0.6mm, 1mm, 2mm, 3mm or 4.5mm, as long as it can play the role of separating the two adjacent capillaries 220.

[0044] The thickness can be set to 0.6 mm, 1 mm, 2 mm, 3 mm or 4.5 mm, as long as it can separate two adjacent capillaries 220 .

[0045] As shown in Figure 7, in one embodiment, one end of the fixing member 230 away from the inlet section 211 protrudes from the connecting section 212. In actual production, the capillary tubes 220 need to be connected to the heat exchange device, so they need to have a certain length. When the capillary tubes 220 are inserted into the connecting section 212, a plurality of capillary tubes 220 located inside the connecting section 212 can be spaced apart, but the plurality of capillary tubes 220 located outside the connecting section 212 may still be close to each other. By setting the end of the fixing member 230 away from the inlet section 211 to protrude from the connecting section 212, the capillary tubes 220 located outside the connecting section 212 can continue to be limited, preventing the capillary tubes 220 from approaching each other, further enhancing the function of the fixing member 230 in separating the capillary tubes 220.

[0046] Referring to Figure 4, specifically, the distance that the fixing member 230 protrudes from the connecting section 212 is L1, and the outer diameter of the capillary 220 is D1, and D1≤L1≤5*D1. When L1<D1, the distance that the fixing member 230 protrudes from the connecting section 212 is too small, and the multiple capillaries 220 outside the connecting section 212 cannot be effectively separated, and welding adhesion is still prone to occur; when L1≥5*D1, the distance that the fixing member 230 protrudes from the connecting section 212 is too large, which is likely to cause material waste. In this application, by setting D1≤L1≤5*D1, it is possible to ensure that the fixing member 230 has a separation effect on the capillaries 220 outside the connecting section 212 while reducing the production cost of the liquid dispenser. Specifically, L1 can be set to D1, 2*D1, 4*D1 or 5*D1.

[0047] Specifically, each of the capillary tubes 220 has an inserting section 221 , and the inserting section 221 is inserted into the connecting section 212 to achieve the connection and cooperation between the capillary tube 220 and the tube body 210 .

[0048] Furthermore, in one embodiment of the present application, a bent section 222 is provided on the side of the plug section 221 away from the inlet section 211. The provision of the bent section 222 further separates the multiple capillary tubes 220, increases the distance between the capillary tubes 220, and prevents welding adhesion. Specifically, the bent sections 222 of the multiple capillary tubes 220 can bend toward each other or in opposite directions, as long as the spacing between the multiple capillary tubes 220 is increased. This can be adjusted based on the specific configuration of the connected heat exchanger.

[0049] In one embodiment of the present application, the plug-in sections 221 of multiple capillaries 220 are arranged parallel to each other. Through the above arrangement, the volume of the tube body 210 can be reduced, the overall occupied space of the dispenser can be reduced, and the spatial layout of the connecting pipelines can be facilitated.

[0050] In one embodiment of the present application, a bent section 222 is provided on the side of the connecting section 221 away from the inlet section 211, and the connecting sections 221 of the multiple capillary tubes 220 are arranged parallel to each other. This arrangement can reduce the overall space occupied by the liquid dispenser while facilitating adjustment of the layout of the liquid dispenser and the capillary tubes 220, thereby reducing the space occupied by the heat exchanger.

[0051] Referring to FIG. 4 , in one embodiment of the present application, the fitting length between the capillary tube 220 and the connecting section 212 is L2, the outer diameter of the inlet is D2, and 2*D2-5*D1≤L2≤10*D2-D1. When 2*D2-5*D1<2*D2, the fitting length between the capillary tube 220 and the connecting section 212 is too small, the stability of the capillary tube 220 inserted into the connecting section 212 is poor, and the capillary tube 220 is easily detached from the connecting section 212. When L2>10*D2-D1, the fitting length between the capillary tube 220 and the connecting section 212 is too large, resulting in an excessively large volume of the tube body 210, which affects production costs. In the present application, by setting 2*D2-5*D1≤L2≤10*D2-D1, the connection strength between the capillary tube 220 and the tube body 210 can be guaranteed while ensuring production costs. Specifically, L2 can be set to 2*D2-5*D1, 5*D2-D1, or 10*D2-D1.

[0052] In one embodiment of the present application, the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary 220 is between 0.5 and 3. When the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary 220 is less than 0.5, the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary 220 is too small, which will cause a large pressure drop in the refrigerant fluid and is not conducive to the uniform liquid separation of the liquid separator; when the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary 220 is greater than 3, the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary 220 is too large, and the refrigerant fluid will produce a large flow resistance when entering the capillary 220, affecting the flow efficiency of the refrigerant fluid when entering the capillary 220. In the present application, by setting the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary 220 between 0.5 and 3, it is possible to ensure the flow efficiency of the refrigerant fluid while ensuring the liquid separation effect of the liquid separator. Specifically, the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary 220 can be set to 0.5, 1, 2 or 3.

[0053] For example, the fitting length between the capillary tube 220 and the connecting section 212 is L2, the outer diameter of the capillary tube 220 is D1, the outer diameter of the inlet is D2, 2*D2-5*D1≤L2≤10*D2-D1, and the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary tube 220 is between 0.5 and 3. This arrangement ensures connectivity between the capillary tube 220 and the liquid distributor, improving the flow of the refrigerant fluid through the liquid distributor.

[0054] Furthermore, a transition section 215 is provided between the connecting section 212 and the inlet section 211. The flow area of ​​the transition section 215 gradually increases from the inlet section 211 toward the connecting section 212. This arrangement can reduce the pressure loss of the refrigerant fluid in the tube body 210, making the flow of the refrigerant fluid in the tube body 210 more stable.

[0055] Specifically, the tube body 210 and the capillary tube 220 may be welded by furnace welding to ensure the processing consistency of the liquid dispenser.

[0056] As shown in Figure 8 , in one embodiment, the end of the inlet section 211 away from the connecting section 212 has a bent portion 213, and an angle is formed between the axis of the inlet section 211 and the axis of the bent portion 213. This arrangement facilitates the spatial layout of the liquid distributor when connected to the heat exchanger and refrigerant pipeline, reducing the space occupied by the heat exchanger.

[0057] 1 , 7 , 9 and 13 , in some embodiments, an outlet 2120 is provided at one end of the connecting section 212 away from the inlet section 211, and the liquid separator 200 further includes a throttling member 240, which is installed in the tube body 210 and is located between the inlet 2110 and the outlet 2120. A through throttling hole 242 is provided on the throttling member 240, and the throttling hole 242 connects the inlet 2110 and the outlet 2120; the liquid separator 200 further includes a capillary 220, which is a plurality of capillaries 220 and is provided at one end of the tube body 210 near the outlet 2120, connected to the inner wall of the tube body 210, and communicated with the inlet 2110; wherein, at least one of the tube body 210 and the throttling member 240 is provided with a positioning portion 241, and the tube body 210 and the throttling member 240 are limitedly matched by the positioning portion 241. Thus, the throttle member 240 is installed between the inlet 2110 and the outlet 2120. After the medium enters the tube body 210, it is throttled by the throttle member 240. The multiple throttle holes 242 on the throttle member 240 can disturb the medium, making the medium mix more evenly and then be separated through the multiple capillaries 220. At least one of the tube body 210 and the throttle member 240 is provided with a positioning portion 241, so that the two can be positioned and engaged with each other, thereby preventing the throttle member 240 from falling off the tube body 210. The positioning portion 241 ensures that the throttle member 240 can be stably fixed to the tube body 210, eliminating the need for additional structures such as welding rings, simplifying the structure of the liquid dispenser 200 and reducing production costs.

[0058] 8 , 10 and 12 , in this embodiment, a plurality of throttling holes 242 are provided, and the plurality of throttling holes 242 are arranged at intervals to increase the flow rate of the medium, so that the medium forms a jetting effect, thereby improving the throttling efficiency of the throttling member 240 .

[0059] Specifically, a chamfer 244 is provided on the outer edge of one end of the throttle member 240 facing the inlet 2110 . The chamfer 244 can make the flow of the medium smoother and reduce the interference caused by the connection and assembly of the throttle member 240 with the inner wall of the tube body 210 .

[0060] The throttle holes 242 are evenly spaced along the circumference of the throttle member 240 to form a honeycomb-like arrangement structure.

[0061] Along the axial direction of the tube body 210, the throttling piece 240 has a connecting section 245 connected to the inner wall of the tube body 210. Along the radial direction of the tube body 210, the throttling piece 240 has a throttling section 246 with a throttling hole 242. The connecting section 245 is connected to the throttling section 246. The connecting section 245 extends along the axial direction of the tube body 210 and is used to limit the connection between the throttling piece 240 and the tube body 210, thereby increasing the connection area between the throttling piece 240 and the tube body 210. The throttling section 246 is arranged along the radial direction of the tube body 210, so that the throttling hole 242 has a better throttling effect on the medium.

[0062] Referring to Figure 13 , the length of the connecting section 245 along the axial direction of the tube body 210 is defined as L, and the range of L satisfies the following: 3mm ≤ L ≤ 8mm. This ensures that the connecting section 245 is sufficiently long and has sufficient contact area with the inner wall of the tube body 210, thereby ensuring the installation stability of the throttle member 240. It also prevents the throttle member 240 from being too long, which would increase installation difficulty, affect the layout of other components within the tube body 210, and increase consumables.

[0063] Exemplarily, the value of L can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, etc., as long as it is between 3mm and 8mm, and is not limited to the two end values.

[0064] Referring to Figure 11 , the wall thickness of the throttle member 240 is further defined as D, and the range of D satisfies the following conditions: 0.2 mm ≤ D ≤ 2 mm. This ensures that the wall thickness of the throttle member 240 is not too thin, thereby affecting its structural strength and preventing deformation under the impact of the medium for a long time, while also preventing the wall thickness from being too thick, thereby affecting its throttling effect.

[0065] Exemplarily, the value of D can be 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, etc., as long as it is between the above-mentioned 0.2mm and 2mm, and is not limited to the two end values.

[0066] There are many implementation methods for disposing the positioning portion 241 , some of which are listed here and described in detail.

[0067] For example, referring to FIG. 12 , in one embodiment, a radially inwardly projecting stopper assembly 14 is provided on the inner wall of the tube body 210. Two stopper assemblies 14 serve as positioning portions 241. Multiple stopper assemblies 14 are provided, and at least two of the side surfaces of the stopper assemblies 14 proximal to the throttle member 240 abut against the axial ends of the throttle member 240. Thus, since the medium flows from the inlet 2110 to the outlet 2120, i.e., along the axial direction of the tube body 210, the stopper assemblies 14 abut against the axial ends of the throttle member 240, providing a more stable stopper effect on the throttle member 240. Furthermore, the stopper assemblies 14 have an arc-shaped cross section. Thus, the stopper assemblies 14 have no sharp corners, thus preventing collisions and wear between the stopper assemblies 14 and the throttle member 240, making the stopper more durable and easier to process. In other embodiments, the cross-section of the limiting component 14 can also be set to a rectangle, that is, the abutting surface between the limiting component 14 and the throttling member 240 is a plane, the abutment between the limiting component 14 and the throttling member 240 is tighter, and the limiting effect is better.

[0068] The limiting component 14 can be formed by stamping the tube body 210 . The stamping process is simple and saves costs.

[0069] In this embodiment, multiple limiting components 14 are evenly spaced along the circumference of the tube body 210, so as to stably abut against the throttling member 240. In other embodiments, the limiting component 14 can also be set as an annular protrusion structure, and the annular limiting component 14 can form a circumferential abutment with the throttling member 240.

[0070] Referring to Figures 12 and 13 , for example, in one embodiment, the inner wall of the tube body 210 is provided with a plurality of positioning protrusions 214 projecting radially inward, and the outer peripheral wall of the throttle member 240 is provided with a positioning groove 243, with each positioning protrusion 214 correspondingly embedded in one of the positioning grooves 243. It is understood that in some embodiments, the outer peripheral wall of the throttle member 240 may also be provided with a plurality of positioning protrusions 214 projecting radially outward, and the inner wall of the tube body 210 may be provided with a plurality of positioning grooves 243, with each positioning protrusion 214 correspondingly embedded in one of the positioning grooves 243. Furthermore, it should be noted that the positioning protrusions 214 and the positioning grooves 243 constitute the positioning portion 241.

[0071] In this way, the positioning protrusion 214 is embedded in the positioning groove 243, and the outer peripheral side of the positioning protrusion 214 forms a circumferential limit with the groove wall of the positioning groove 243, which has a better limiting effect. Multiple positioning protrusions 214 and multiple positioning grooves 243 can form multiple limiting points, further improving the installation stability of the throttle member 240. In addition, the throttle member 240 is provided with a positioning protrusion 214 or a positioning groove 243, which also causes the cross-sectional area of ​​the refrigerant to change when it flows to the positioning protrusion 214 or the positioning groove 243. This is conducive to forming a disturbance, thereby improving the uniformity of the refrigerant separation and achieving the positioning effect at the same time. It can be understood that compared with the positioning protrusion 214 provided on the throttle member 240, the positioning groove 243 provided on the throttle member 240 can make the cross-sectional area through which the refrigerant flows smaller and the flow rate greater, which is more conducive to improving the heat exchange efficiency.

[0072] In this embodiment, the positioning protrusions 214 are provided on the inner wall of the tube body 210, and the positioning grooves 243 are provided on the outer circumferential wall of the throttle member 240. For example, the positioning protrusions 214 are evenly spaced along the circumference of the inner wall of the tube body 210, and correspondingly, the positioning grooves 243 are evenly spaced along the circumferential wall of the throttle member 240. Each positioning protrusion 214 is embedded in a corresponding positioning groove 243, and both are arranged in the circumferential direction, thereby achieving a more balanced and stable positioning effect between the positioning member and the tube body 210.

[0073] Of course, in other embodiments, when the positioning protrusions 214 are protruding from the outer circumferential wall of the throttle member 240 and the positioning grooves 243 are formed on the inner wall of the tube body 210, the two can still be arranged along the circumference as described above, thereby forming a uniform and stable limiting effect. For example, the positioning protrusions 214 are stamped and formed through the tube body 210 or the throttle member 240, which simplifies the process and saves costs.

[0074] The depth of the positioning groove 243 along the radial direction of the tube body 210 is defined as H, and the range of H satisfies the following conditions: 0.2mm≤H≤1.5mm. This ensures that the positioning groove 243 is deep enough to engage with the positioning protrusion 214, preventing the positioning protrusion 214 from dislodging from the positioning groove 243 and causing the throttle member 240 to fall off. It also prevents the positioning groove 243 from being too deep, resulting in insufficient structural strength of the throttle member 240 and causing damage to the throttle member 240.

[0075] Exemplarily, the value of H can be 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, etc. It only needs to be between the two end values ​​and can be flexibly changed according to needs.

[0076] Exemplarily, the positioning protrusion 214 is a hemispherical structure, and the notch of the positioning groove 243 is circular, so that the two are more adaptable, and when the throttle member 240 is axially offset, the positioning protrusion 214 and the positioning groove 243 can still be matched together.

[0077] As shown in Figures 14 to 18, the present application also provides a heat exchanger, which includes a liquid separation part and a heat exchange part. The liquid separation part has a liquid separator 200, and the liquid separator 200 is the above-mentioned liquid separator. The heat exchange part has a plurality of heat exchange tubes 100 arranged at intervals along the first direction, and one end of each heat exchange tube 100 is connected to one end of the capillary 220 of the liquid separator 200 away from the connecting section 212 of the tube body 210.

[0078] Furthermore, the liquid separation portion has a refrigerant outlet, each refrigerant outlet is arranged in a one-to-one correspondence with the heat exchange tube and is connected to the corresponding heat exchange tube. A plurality of liquid separators 200 are provided, and liquid separators 200 of different levels are arranged in series, and multiple liquid separators 200 of the same level are arranged in parallel. The liquid separator 200 includes a tube body 210 and a plurality of capillaries 220. The capillaries 220 of the upper-level liquid separator 200 are connected to the tube body 210 of the lower-level liquid separator 200. The capillary tubes 220 connected to the heat exchange tube 100 form the refrigerant outlet, and the capillary tubes 220 connected to the lower-level liquid separator 200 are bent in a first direction toward the tube body 210 of the same-level liquid separator 200.

[0079] By arranging a plurality of liquid separators 200 in series and a distribution scheme in which a plurality of liquid separators 200 at the same level are connected in parallel, the capillary tube 220 can be directly connected to the heat exchange tube 100, which is conducive to uniform distribution of the refrigerant and can reduce the volume of the tube body 210, so that the flow area of ​​the refrigerant fluid will not change significantly, which is conducive to the circulation of the refrigerant fluid; and, by arranging the capillary tube 220 connected to the liquid separator 200 of the next level to bend in the first direction toward the direction of the tube body 210 of the liquid separator 200 at the same level, the spacing between the plurality of capillary tubes 220 of the liquid separator 200 at the same level in the first direction can be reduced. The multiple capillaries 220 are brought closer to each other, and the distribution range of the multiple capillaries 220 in the first direction, i.e., the arrangement direction of the multiple heat exchange tubes 100, is made more compact, thereby reducing the occupied space of the liquid separation part. At the same time, through the above-mentioned arrangement, it is also possible to ensure that there is a certain interval between the capillaries 220 of the first-level liquid separator 200 connected to the heat exchange tube 100, so as to prevent the melted flux from flowing along the outer wall of the capillary 220 under the capillary action during the welding connection between the capillary 220 and the tube body 210, thereby ensuring the welding effect of the capillary 220 and improving the reliability of the connection between the tube body 210 and the capillary 220.

[0080] 15 , the x direction is the arrangement direction of the plurality of heat exchange tubes 100 , ie, the first direction.

[0081] Exemplarily, the extension direction of the inlet section 211 and the connecting section 212 is linear, the capillary 220 connected to the next-level separator 200 is bent in the first direction toward the tube body 210 of the same-level separator 200, and the inlet section 211 is connected to the capillary 220 of the previous-level separator, and the bend is only formed on the capillary 220.

[0082] Illustratively, the bending portion 213 bends in a first direction toward the tube body 210 of the same-level liquid separator 200 , and the capillary 220 is bent by the bending portion 213 , thereby facilitating the processing and forming of the capillary 220 .

[0083] For example, the extension direction of the tube body 210 connected to the heat exchange tube 100 forms an angle with the extension direction of the heat exchange tube 100 in the first direction. This arrangement can reduce the spacing between the multiple liquid distributors 200 connected to the heat exchange tube 100, further reducing the distance between the capillaries 220 of the upper-stage liquid distributor 200, making the structure of the upper-stage liquid distributor 200 more compact.

[0084] As shown in FIG14 , in one embodiment, the liquid separator 200 includes a first liquid separator 201 and multiple second liquid separators 202. The first liquid separator 201 includes a first tube 2011 and multiple first capillary tubes 2012. The second liquid separator 202 includes a second tube 2021 and multiple second capillary tubes 2022. Each second tube 2021 is connected to a first capillary tube 2012 in a one-to-one correspondence, and each second capillary tube 2022 is connected to a heat exchange tube 100 in a one-to-one correspondence. The first tube 2011 has a refrigerant inlet, which in this embodiment is an inlet 2110 of the first liquid separator 201. The first tube 2011 is located in the middle of the multiple heat exchange tubes 100 in the first direction. The multiple first capillary tubes 2012 bend toward the first tube 2011 in the first direction. Specifically, the middle of the multiple heat exchange tubes 100 refers to the multiple heat exchange tubes 100 along the first direction excluding the ends. Through the above arrangement, along the first direction, multiple first capillaries 2012 can be brought closer to each other by bending the first capillaries 2012, thereby reducing the spacing between the multiple first capillaries 2012, thereby reducing the overall occupied space of the first liquid distributor 201 and facilitating the overall layout of the air-conditioning system.

[0085] Furthermore, the plurality of second tubes 2021 may also be inclined toward the middle in the first direction, so that the distance between the plurality of second tubes 2021 can be reduced, thereby reducing the overall occupied space of the liquid separation part.

[0086] In some feasible embodiments of the present application, within the liquid separator 200 at the same level connected to the heat exchange tubes 100, the axis of at least one tube 210 is not located in the plane formed by the centerlines of the multiple heat exchange tubes 100. Through this arrangement, the tubes 210 whose axes are not located in the plane formed by the centerlines of the multiple heat exchange tubes 100 can avoid the remaining tubes 210, allowing the remaining tubes 210 to be closer together, further reducing the overall volume occupied by the liquid separator in the first direction and making the layout of the air conditioning system more flexible.

[0087] As shown in Figures 14 to 18 , in one embodiment, within the liquid separator 200 of the same level connected to the heat exchange tubes 100, two adjacent tubes 210 are located on either side of a plane formed by the centerlines of the multiple heat exchange tubes 100. This arrangement creates a gap between two adjacent tubes 210 located on the same side of the plane formed by the centerlines of the multiple heat exchange tubes 100, further reducing the distance between the two adjacent tubes 210. This makes the arrangement of the multiple tubes 210 in the first direction more compact, further reducing the space occupied by the liquid separator.

[0088] Specifically in the present application, the refrigerant outlet is connected to the end of the heat exchange tube 100, and the heat exchange tube 100 is a flat tube. There is a connector 300 between the refrigerant outlet and the heat exchange tube 100. One end of the connector 300 is connected to one end of the flat tube, and the other end of the connector 300 is connected to the end of the capillary 220 away from the liquid separator. Specifically, one end of the connector 300 connected to the flat tube is adapted to the cross-sectional shape of the flat tube in the flow direction, and one end of the connector 300 connected to the capillary tube 220 is adapted to the cross-sectional shape of the capillary tube 220 in the flow direction. The cross-sectional dimensions of the flat tube along the flow direction of the refrigerant are not equal in the length and width directions. The cross-sectional shape of the capillary tube 220 is circular. When the capillary tube 220 and the heat exchange tube 100 are directly connected, the change in the cross-sectional shape of the flow channel will cause a certain flow resistance to the refrigerant fluid, affecting the circulation of the refrigerant fluid. By setting the connector 300, the circulation of the refrigerant can be buffered to a certain extent, reducing the flow resistance generated by the change in the cross-sectional shape of the flow channel during the circulation of the refrigerant, so as to ensure the circulation efficiency of the refrigerant in the heat exchanger, thereby improving the heat exchange effect of the heat exchanger.

[0089] In some specific embodiments of the present application, the connector 300 includes multiple transfer tubes 310, each of which has a first transfer port 3101 and a second transfer port 3102 that communicate with each other. Each first transfer port 3101 communicates with one end of the flat tube, and each second transfer port 3102 communicates with the end of the capillary tube 220 away from the liquid dispenser 200. The inner wall of the transfer tube 310 forms a smooth transition from the first transfer port 3101 to the second transfer port 3102. This configuration can reduce the magnitude of the cross-sectional shape change of the inner wall of the connector 300, further reducing the impact of the cross-sectional shape change of the flow channel on the circulation of the refrigerant fluid, thereby improving the efficiency of the fluid circulation.

[0090] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A liquid dispenser, characterized in that: The liquid distributor comprises a tube body, wherein the tube body has an inlet section and a connecting section which are connected to each other, and an inlet is provided at one end of the inlet section away from the connecting section; The liquid dispenser further includes a capillary tube and a fixing member, wherein a plurality of capillaries are provided and the plurality of capillaries are inserted into the connecting section, and one end of the capillary tube located in the connecting section is connected to the inlet; The fixing member is arranged in the connecting section, and the fixing member and the inner wall of the connecting section form a plurality of separation cavities. The plurality of capillaries are arranged in a one-to-one correspondence with the plurality of separation cavities. One end of the capillary is located in the separation cavity. Any two adjacent capillaries are separated by the fixing member. The fixing member, the plurality of capillaries and the connecting section are connected and fixed, and seal the end of the connecting section away from the inlet section.

2. The liquid dispenser according to claim 1, wherein The fixing member has multiple fixing arms, each of which has a connecting end and a free end that are relatively arranged. The connecting ends of the multiple fixing arms are connected to each other. The multiple fixing arms are distributed at intervals around the circumference of the connecting section and form multiple separation cavities with the inner wall of the connecting section.

3. The liquid dispenser according to claim 1, wherein The shape of the inner wall of the separation cavity is adapted to the shape of the outer periphery of the capillary tube.

4. The liquid dispenser according to claim 1, wherein The side wall of the connecting section has a connecting portion and a matching portion that are connected to each other. The inner side wall of the matching portion is in contact with the outer side wall of the capillary. The cross-sectional shape of the matching portion along the extension direction is adapted to the cross-sectional shape of the capillary along the extension direction. The connecting portion is provided between two adjacent matching portions, and the inner wall of the connecting portion abuts against and is fixedly connected to the fixing member.

5. The liquid dispenser according to claim 1, wherein In the circumferential direction of the connecting section, the distance between two adjacent capillaries is greater than 0.5 mm and less than 5 mm.

6. The liquid dispenser according to claim 1, wherein: One end of the fixing piece away from the inlet section protrudes from the connecting section.

7. The liquid dispenser according to claim 1, wherein: The distance that the fixing member protrudes from the connecting section is defined as L1, and the outer diameter of the capillary is defined as D1, where D1≤L1≤5*D1.

8. The liquid dispenser according to claim 1, wherein The plurality of capillaries each have an inserting section, the inserting section is inserted into the connecting section, a bending section is provided on a side of the inserting section away from the inlet section, and / or the inserting sections of the plurality of capillaries are arranged parallel to each other.

9. The liquid dispenser according to claim 1, wherein: The fitting length between the capillary and the connecting section is defined as L2, the outer diameter of the capillary is defined as D1, the outer diameter of the inlet is defined as D2, 2*D2-5*D1≤L2≤10*D2-D1, and / or the ratio of the flow area of ​​the inlet to the flow area of ​​the capillary is between 0.5-3.

10. The liquid dispenser according to claim 1, wherein One end of the inlet section away from the connecting section has a bending portion, and an angle is formed between the axis of the inlet section and the axis of the bending portion.

11. The liquid dispenser according to claim 1, wherein: An outlet is provided at one end of the connecting section away from the inlet section; The liquid distributor also includes a throttling member, which is installed in the tube body and located between the inlet and the outlet. The throttling member is provided with a through throttling hole, and the throttling hole connects the inlet and the outlet; wherein, at least one of the tube body and the throttling member is provided with a positioning portion, and the tube body and the throttling member are limitedly matched by the positioning portion.

12. The liquid dispenser according to claim 11, wherein The inner wall of the tube body has two limiting components protruding radially inward, the two limiting components are the positioning parts, and the two limiting components are respectively in contact with the two ends of the throttling member in the axial direction.

13. The liquid dispenser according to claim 11, wherein: A positioning protrusion is provided on the outer peripheral wall of the throttling member radially outward, a positioning groove is provided on the inner wall of the tube body, and the positioning protrusion is correspondingly embedded in the positioning groove, and the positioning protrusion and the positioning groove are the positioning part; or a positioning protrusion is provided on the inner wall of the tube body radially inward, a positioning groove is provided on the outer peripheral wall of the throttling member, and the positioning protrusion is correspondingly embedded in the positioning groove, and the positioning protrusion and the positioning groove are the positioning part.

14. The liquid dispenser according to claim 13, wherein: Along the radial direction of the tube body, the depth of the positioning groove is defined as H, and the range of H satisfies: 0.2mm≤H≤1.5mm.

15. The liquid dispenser according to claim 13, wherein: The positioning protrusion is a hemispherical structure, and the notch of the positioning groove is set to be circular.

16. The liquid dispenser according to any one of claims 11 to 13, wherein: There are multiple throttle holes, and the multiple throttle holes are arranged at intervals.

17. The liquid dispenser according to claim 16, wherein: Along the axial direction of the tube body, the throttling member has a connecting section connected to the inner wall of the tube body. Along the radial direction of the tube body, the throttling member has a throttling section with the throttling hole, and the connecting section is connected to the throttling section.

18. The liquid dispenser according to claim 17, wherein: The length of the connecting section is defined as L, and the range of L satisfies: 3mm≤L≤8mm.

19. The liquid dispenser according to claim 16, wherein: The wall thickness of the throttling member is defined as D, and the range of D satisfies: 0.2 mm ≤ D ≤ 2 mm.

20. A heat exchanger, characterized in that: It includes a liquid separation part and a heat exchange part, the liquid separation part has a liquid separator, and the liquid separator is the liquid separator according to any one of claims 10 to 19; the heat exchange part has a plurality of heat exchange tubes arranged at intervals along a first direction, and one end of each of the heat exchange tubes is connected to one end of the capillary of the liquid separator away from the connecting section of the tube body.

21. The heat exchanger according to claim 20, wherein The liquid separation part has a refrigerant outlet, each of the refrigerant outlets is arranged in a one-to-one correspondence with the heat exchange tube and is connected to the corresponding heat exchange tube. The liquid separator is provided in plurality, the liquid separators of different levels are arranged in series, and the multiple liquid separators of the same level are arranged in parallel. The liquid separator includes a tube body and a plurality of capillaries. The capillary tube of the liquid separator of the upper level is connected to the tube body of the liquid separator of the lower level, and the capillary tube connected to the heat exchange tube forms the refrigerant outlet; The capillary tube connected to the liquid dispenser at the next stage is bent in the first direction toward the tube body of the liquid dispenser at the same stage.

22. The heat exchanger according to claim 21, wherein An extending direction of the tube body connected to the heat exchange tube forms an angle with an extending direction of the heat exchange tube in the first direction.

23. The heat exchanger according to claim 21, wherein The liquid separation part has a first liquid separator and multiple second liquid separators, the first liquid separator has a first tube body and multiple first capillaries, the second liquid separator has a second tube body and multiple second capillaries, each of the second tube bodies is connected to the first capillary in a one-to-one correspondence, and each of the second capillary tubes is connected to the heat exchange tube in a one-to-one correspondence, the first tube body has the inlet, the first tube body is located in the middle of the multiple heat exchange tubes in the first direction, and the multiple first capillaries are bent toward the direction of the first tube body in the first direction.

24. The heat exchanger according to claim 21, wherein In the liquid distributor at the same level connected to the heat exchange tubes, the axis of at least one tube body is not on the plane formed by the center lines of the plurality of heat exchange tubes.

25. The heat exchanger according to claim 24, wherein In the liquid distributor of the same level connected to the heat exchange tubes, two adjacent tube bodies are respectively located on both sides of a plane formed by the center lines of the plurality of heat exchange tubes.

26. The heat exchanger according to claim 21, wherein The refrigerant outlet is connected to the end of the heat exchange tube, and the heat exchange tube is a flat tube. There is a connecting piece between the refrigerant outlet and the heat exchange tube. One end of the connecting piece is connected to one end of the flat tube, and the other end of the connecting piece is connected to the end of the capillary tube away from the liquid separator.

27. The heat exchanger according to claim 26, wherein The connecting piece includes a plurality of transfer tubes, each of which has a first transfer interface and a second transfer interface that are connected to each other. Each of the first transfer interfaces is connected to one end of the flat tube, and each of the second transfer interfaces is connected to the end of the capillary away from the liquid dispenser. The inner wall of the transfer tube is formed in a smooth transition from the first transfer interface to the second transfer interface.

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