Liquid separator and heat exchanger with same

Abstract

The invention provides a liquid separator and a heat exchanger with the same, the liquid separator comprises a liquid separation head, the liquid separation head is provided with an inlet section and a connecting section which are communicated with each other, and a fluid inlet is formed in one end, far away from the connecting section, of the inlet section; the multiple capillary tubes are inserted into the connecting section, and the ends, located on the connecting section, of the capillary tubes communicate with the fluid inlet; the fixing part is arranged in the connecting section, a plurality of separation cavities are formed by the fixing part and the inner wall of the connecting section, the capillary tubes and the separation cavities are arranged in a one-to-one correspondence mode, one ends of the capillary tubes are located in the separation cavities, any two adjacent capillary tubes are separated through the fixing part, and the fixing part, the capillary tubes and the connecting section are connected and fixed. The end, away from the inlet section, of the connecting section is blocked. By means of the technical scheme, the problem that in the prior art, the distance between capillary tubes is too small can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid separators, and in particular to a liquid separator and a heat exchanger having the same. Background Art

[0002] 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.

[0003] In the prior 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 are 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 melts and adsorbs on the capillaries, causing welding adhesion between the capillaries located outside the dispense head, thereby causing material waste and increasing production costs. Summary of the Invention

[0004] The present invention provides a liquid separator and a heat exchanger having the same, so as to solve the problem in the prior art that capillary tubes are prone to welding adhesion during welding.

[0005] According to one aspect of the present invention, a liquid dispenser is provided, which includes: a liquid dispenser head, the liquid dispenser head having an inlet section and a connecting section that are interconnected, and a fluid inlet is provided at one end of the inlet section away from the connecting section; a capillary tube, a plurality of capillaries are provided, the plurality of capillaries are inserted in the connecting section, and the capillaries are located at one end of the connecting section and connected to the fluid inlet; a fixing member, the fixing member is provided in the connecting section, the fixing member and the inner wall of the connecting section form a plurality of separation cavities, the plurality of capillaries are provided in a one-to-one correspondence with the plurality of separation cavities, one end of the capillary tube 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 the end of the connecting section away from the inlet section is sealed.

[0006] Applying the technical solution of the present invention, the liquid dispenser includes a liquid dispensing head, a capillary and a fixing part. When multiple capillaries are inserted in the connecting section, the two adjacent capillaries are separated by the fixing part, which can prevent the two adjacent capillaries from getting too close under the action of gravity, so that there is a certain distance between the two adjacent capillaries, thereby reducing the capillary phenomenon between the outer walls of the capillaries, and preventing the molten flux from flowing along the capillary under the capillary action when the capillary is welded to the liquid dispensing head and affecting the welding effect, thereby ensuring the stability of the connection between the capillary and the liquid dispensing head, and preventing the capillary from welding and sticking, thereby ensuring the service life of the capillary. Moreover, compared with the traditional technical solution, the technical solution provided by the present application does not need to extend the length of the capillary, can avoid material waste, and reduce production costs.

[0007] Furthermore, the fixing member includes multiple fixing arms, each having a connecting end and a free end oppositely disposed. The connecting ends of the multiple fixing arms are interconnected, and the multiple fixing arms are spaced apart around the circumference of the connecting section and form multiple partitioning cavities with the inner wall of the connecting section. This arrangement prevents two adjacent capillaries from approaching each other, thereby weakening the capillary effect between the two adjacent capillaries.

[0008] Furthermore, the shape of the inner wall of the partition cavity is adapted to the outer peripheral shape of the capillary tube. Through the above arrangement, the gaps between the capillary tube, the fixed arm and the connecting section can be sealed as much as possible during the welding process, thereby ensuring the sealing of the liquid separation head.

[0009] Furthermore, the side wall of the connecting section has a connecting portion and a matching portion that are interconnected. The inner side wall of the matching portion fits the outer side wall of the capillary tube, and the cross-sectional shape of the matching portion along the extension direction is adapted to the cross-sectional shape of the capillary tube along the extension direction. A connecting portion is provided between two adjacent matching portions, and the inner wall of the connecting portion abuts and is fixedly connected to the fixing member. This arrangement can make the space inside the connecting section more compact, thereby improving the liquid separation effect of the liquid separation head.

[0010] Furthermore, 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. Through the above arrangement, the capillary action between the two adjacent capillaries can be reduced while ensuring the liquid separation effect of the liquid dispenser.

[0011] Furthermore, the fixing piece is arranged at one end away from the inlet section and protrudes from the connecting section. Through the above arrangement, the function of the fixing piece in separating the capillaries can be further enhanced.

[0012] Furthermore, the distance that the fixing member protrudes from the connecting section is L1, the outer diameter of the capillary is D1, and D1≤L1≤5*D1. The above arrangement can ensure the separation effect of the fixing member on the capillary outside the connecting section while reducing the production cost of the liquid dispenser.

[0013] Furthermore, the capillaries each have a connecting section that plugs into the separation chamber, a bent section is provided on the side of the connecting section away from the inlet section, and / or the connecting sections of the capillaries are arranged parallel to each other. This arrangement further separates the capillaries, increases the distance between them, and prevents welding adhesion.

[0014] Furthermore, the fitting length between the capillary tube and the connecting section is L2, the outer diameter of the fluid inlet is D2, 2*D2-5*D1≤L2≤10*D2-D1, and / or the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube is between 0.5 and 3. This arrangement ensures the connection strength between the capillary tube and the liquid dispensing head while ensuring production costs, and also ensures the liquid dispensing effect of the liquid dispenser.

[0015] Furthermore, the inlet section has a bend at one end away from the connecting section, and an angle is formed between the axis of the inlet section and the axis of the bend. This arrangement facilitates the spatial layout of the liquid separator when it is connected to the heat exchanger and the refrigerant pipeline, reducing the space occupied by the heat exchanger.

[0016] According to another aspect of the present invention, a heat exchanger is provided, comprising a liquid separator, the liquid separator being the aforementioned liquid separator, and a plurality of heat exchange tubes spaced apart along a first direction, wherein one end of each heat exchange tube is connected to an end of a connecting section of a capillary tube of the liquid separator that is distal to the liquid separator head. This arrangement can reduce material waste during the production process of the heat exchanger and reduce the overall production cost of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 A schematic structural diagram of a liquid dispenser provided in an embodiment of the present invention is shown;

[0019] Figure 2 FIG2 shows a side view of a liquid dispenser provided by a first embodiment of the present invention;

[0020] Figure 3 FIG2 shows a side view of a liquid dispenser provided by a second embodiment of the present invention;

[0021] Figure 4 shows a cross-sectional view of a liquid dispenser provided by a third embodiment of the present invention;

[0022] Figure 5 FIG2 shows a schematic structural diagram of a liquid dispenser provided in a fourth embodiment of the present invention;

[0023] Figure 6 FIG2 shows a front view of a heat exchanger provided by a fifth embodiment of the present invention;

[0024] Figure 7 FIG2 shows a schematic structural diagram of a heat exchanger provided by a sixth embodiment of the present invention;

[0025] Figure 8 FIG2 shows a front view of a heat exchanger provided by a sixth embodiment of the present invention;

[0026] Figure 9 FIG2 shows a top view of a heat exchanger provided by a sixth embodiment of the present invention;

[0027] Figure 10 FIG2 shows a side view of a heat exchanger provided by a sixth embodiment of the present invention;

[0028] Figure 11 The figure shows a schematic structural diagram of the throttling element provided by the present invention;

[0029] Figure 12 A cross-sectional view showing the cooperation between the throttling element and the liquid distributor provided by the present invention is shown.

[0030] The above drawings include the following reference numerals:

[0031] 100, heat exchange tube; 200, liquid distributor;

[0032] 210, dispensing head; 211, inlet section; 212, connecting section; 2121, connecting portion; 2122, fitting portion; 213, bending portion; 214, limiting protrusion; 215, transition section;

[0033] 201, first liquid dispenser; 2011, first liquid dispensing head; 2012, first capillary;

[0034] 202, second liquid dispenser; 2021, second liquid dispensing head; 2022, second capillary;

[0035] 220, capillary tube; 221, plug section; 222, bending section;

[0036] 230, fixing member; 231, fixing arm;

[0037] 240, throttle member; 241, positioning portion; 242, throttle hole;

[0038] 300. Connectors. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figure 1 As shown, an embodiment of the present invention provides a liquid dispenser, which includes a liquid dispensing head 210, a capillary tube 220, and a fixing member 230. The liquid dispensing head 210 has an inlet section 211 and a connecting section 212 that are interconnected. The inlet section 211 is provided with a fluid inlet at one end away from the connecting section 212. A plurality of capillaries 220 are provided, and the plurality of capillaries 220 are inserted into the connecting section 212. One end of the capillary tube 220 located in the connecting section 212 is connected to the fluid inlet. The 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 partition chambers. The plurality of capillaries 220 are provided in a one-to-one correspondence with the plurality of partition chambers. One end of the capillary tube 220 is located in the partition chamber. 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.

[0041] Applying the technical solution of the present invention, the liquid dispenser includes a liquid dispenser head 210, a capillary 220 and a fixing part 230. When multiple capillaries 220 are inserted into the connecting section 212, the fixing part 230 separates two adjacent capillaries 220, 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 220, and preventing the molten flux from flowing along the capillary 220 under the capillary action when the capillary 220 is welded to the liquid dispenser head 210, thereby affecting the welding effect, ensuring the stability of the connection between the capillary 220 and the liquid dispenser head 210, and preventing the capillary 220 from welding and sticking, thereby ensuring the service life of the capillary 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 220, can avoid material waste, and reduce production costs.

[0042] Specifically, the fixing member 230 has a plurality of fixing arms 231, each of which has a connecting end and a free end that are relatively arranged. The connecting ends of the plurality of fixing arms 231 are interconnected, and the plurality of fixing arms 231 are spaced apart around the circumference of the connecting section 212, and form a plurality of separation cavities with the inner wall of the connecting section 212. Through the above arrangement, when the capillary tubes 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 the phenomenon of welding adhesion. Moreover, by providing the connecting ends of the plurality of fixing arms 231 to be connected to each other, the capillary tubes 220 are located between two adjacent fixing arms 231. On the basis of separating the two adjacent capillaries 220, multiple capillaries 220 can 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.

[0043] like Figure 2 As shown, in the first embodiment of the present application, 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.

[0044] like Figure 3 As shown, in the second embodiment of the present application, the shape of the side of the fixed arm 231 facing the capillary tube 220 is adapted to the outer peripheral shape of the capillary tube 220, and thus the shape of the inner wall of the partition cavity is adapted to 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 liquid dispensing head 210.

[0045] Reference Figure 2 or Figure 3 As shown, the side wall of the connecting section 212 has a connecting portion 2121 and a matching portion 2122 that are interconnected. The inner side wall of the matching portion 2122 is in contact with the outer side wall of the capillary 220. The cross-sectional shape of the matching portion 2122 along the extension direction is adapted to the cross-sectional shape of the capillary 220 along the extension direction. A connecting portion 2121 is provided between two adjacent matching portions 2122. The inner wall of the connecting portion 2121 abuts and is fixedly connected to the fixing member 230. Through the above arrangement, the space inside the connecting section 212 can be made as compact as possible, improving the liquid dispensing effect of the liquid dispensing head 210. It can also reduce the space occupied by the connecting section 212, which is conducive to miniaturization of the liquid dispenser.

[0046] 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.

[0047] Reference Figure 4 As shown, in the third embodiment of the present application, one end of the fixing member 230 away from the inlet section 211 protrudes from the connecting section 212. In actual production, the capillary tube 220 needs to be connected to the heat exchange device, so it needs to have a certain length. When the capillary tube 220 is 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.

[0048] Specifically, in the present application, 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 the present 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.

[0049] Specifically in the present application, the plurality of capillaries 220 each have an inserting section 221 , and the inserting section 221 is inserted into the connecting section 212 to achieve connection and cooperation between the capillary 220 and the liquid dispensing head 210 .

[0050] 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.

[0051] In another specific 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 liquid separation head 210 can be reduced, the overall occupied space of the liquid separator can be reduced, and the spatial layout of the connecting pipelines can be facilitated.

[0052] In another specific 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.

[0053] In one embodiment of the present application, the fitting length between the capillary 220 and the connecting section 212 is L2, the outer diameter of the fluid 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 220 and the connecting section 212 is too small, the stability of the capillary 220 inserted in the connecting section 212 is poor, and the capillary 220 is easy to fall off from the connecting section 212; when L2>10*D2-D1, the fitting length between the capillary 220 and the connecting section 212 is too large, resulting in an excessively large volume of the liquid-dispensing head 210, which affects the production cost. In the present application, by setting 2*D2-5*D1≤L2≤10*D2-D1, the connection strength between the capillary 220 and the liquid-dispensing head 210 can be guaranteed while ensuring the production cost. Specifically, L2 can be set to 2*D2-5*D1, 5*D2-D1, or 10*D2-D1.

[0054] In one embodiment of the present application, the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 220 is between 0.5 and 3. When the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 220 is less than 0.5, the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 220 is too small, which will cause a large pressure drop in the refrigerant fluid and is not conducive to uniform liquid separation of the liquid distributor; when the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 220 is greater than 3, the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 220 is too large, and the refrigerant fluid will generate a large flow resistance when entering the capillary tube 220, affecting the flow efficiency of the refrigerant fluid when entering the capillary tube 220. In the present application, by setting the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 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 distributor. Specifically, the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 220 can be set to 0.5, 1, 2 or 3.

[0055] In another specific embodiment of the present application, the 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 fluid inlet is D2, 2*D2-5*D1≤L2≤10*D2-D1, and the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube 220 is between 0.5 and 3. This arrangement ensures the connectivity between the capillary tube 220 and the liquid distributor, improving the flow of the refrigerant fluid through the liquid distributor.

[0056] 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 liquid separation head 210, making the flow of the refrigerant fluid in the liquid separation head 210 more stable.

[0057] Specifically in the present application, the liquid dispensing head 210 and the capillary 220 can be welded by furnace welding to ensure the processing consistency of the liquid dispenser.

[0058] Reference Figure 5 As shown, in the fourth embodiment of the present application, the end of the inlet section 211 away from the connecting section 212 has a bend 213, and an angle is formed between the axis of the inlet section 211 and the axis of the bend 213. This arrangement facilitates the spatial layout of the liquid distributor when connected to the heat exchanger and the refrigerant pipeline, thereby reducing the space occupied by the heat exchanger.

[0059] like Figures 6 to 10As shown, an embodiment of the present invention further provides a heat exchanger, which has a liquid separator 200, which is the above-mentioned liquid separator, and the heat exchanger further includes a plurality of heat exchange tubes 100 arranged at intervals along a first direction, and one end of each heat exchange tube 100 is connected to one end of the connection section 212 of the capillary tube 220 of the liquid separator 200 away from the liquid separator head 210. Specifically, the liquid separator 200 is provided with multiple stages, the multiple stages of liquid separators 200 are arranged in series, and the multiple liquid separators 200 of the same stage are arranged in parallel. The liquid separator 200 includes a liquid separator head 210 and a plurality of capillary tubes 220, the capillary tubes 220 of the upper stage liquid separator 200 are connected to the liquid separator head 210 of the lower stage liquid separator 200, the capillary tubes 220 connected to the heat exchange tubes 100 form a refrigerant outlet, and the capillary tubes 220 connected to the lower stage liquid separator 200 are bent in the first direction toward the liquid separator head 210 of the same stage liquid separator 200.

[0060] By arranging a multi-stage liquid separator 200 in series and a distribution scheme in which multiple liquid separators 200 of the same stage 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 liquid separator head 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 next-stage liquid separator 200 to bend in the first direction toward the liquid separator head 210 of the same-stage liquid separator 200, the spacing between the multiple capillary tubes 220 of the same-stage liquid separator 200 in the first direction can be reduced. The multiple capillaries 220 are brought close 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, the above-mentioned arrangement can also 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 liquid separation head 210, thereby ensuring the welding effect of the capillary 220 and improving the reliability of the connection between the liquid separation head 210 and the capillary 220.

[0061] Reference Figure 7 As shown, the x direction is the arrangement direction of the plurality of heat exchange tubes 100 , that is, the first direction.

[0062] In some feasible embodiments of the present application, the extension direction of the inlet section 211 and the connecting section 212 is linear, the capillary 220 connected to the next-level dispenser 200 is bent in the first direction toward the dispensing head 210 of the same-level dispenser 200, and the inlet section 211 is connected to the capillary 220 of the previous-level dispenser, and the bend is only formed on the capillary 220.

[0063] In some other embodiments of the present application, the bending portion 213 bends in a first direction toward the dispensing head 210 of the same-level dispenser 200 , and the capillary 220 is bent by the bending portion 213 , thereby facilitating the processing and forming of the capillary 220 .

[0064] In some feasible embodiments of the present application, the extension direction of the liquid distributor 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.

[0065] Reference Figure 6 As shown, in the fifth embodiment of the present application, the liquid distributor 200 includes a first liquid distributor 201 and a plurality of second liquid distributors 202. The first liquid distributor 201 has a first liquid distributor head 2011 and a plurality of first capillary tubes 2012. The second liquid distributor 202 has a second liquid distributor head 2021 and a plurality of second capillary tubes 2022. Each second liquid distributor head 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 liquid distributor head 2011 has a refrigerant inlet and is located in the middle of the plurality of heat exchange tubes 100 in the first direction. The plurality of first capillary tubes 2012 bend in the first direction toward the first liquid distributor head 2011. Specifically, the middle of the plurality of heat exchange tubes 100 refers to the plurality of heat exchange tubes 100 excluding the two ends along the first direction. 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.

[0066] Furthermore, the plurality of second liquid separating heads 2021 may also be tilted toward the middle in the first direction, so that the distance between the plurality of second liquid separating heads 2021 can be reduced, thereby reducing the overall occupied space of the liquid separating portion.

[0067] In some feasible embodiments of the present application, within the liquid distributor 200 at the same level connected to the heat exchange tubes 100, the axis of at least one liquid distributor head 210 is not located in the plane formed by the centerlines of the multiple heat exchange tubes 100. Through this arrangement, the liquid distributor head 210 whose axis is not located in the plane formed by the centerlines of the multiple heat exchange tubes 100 can avoid the remaining liquid distributor heads 210, allowing the remaining liquid distributor heads 210 to be closer to each other, further reducing the overall volume occupied by the liquid distributor head in the first direction and making the layout of the air conditioning system more flexible.

[0068] Reference Figures 6 to 9As shown, in the sixth embodiment of the present application, within the liquid distributor 200 of the same level connected to the heat exchange tubes 100, two adjacent liquid distributor heads 210 are located on either side of the plane formed by the center lines of the multiple heat exchange tubes 100. Through this arrangement, a gap can be formed between the two adjacent liquid distributor heads 210 located on the same side of the plane formed by the center lines of the multiple heat exchange tubes 100, and the distance between the two adjacent liquid distributor heads 210 can be further reduced, making the arrangement of the multiple liquid distributor heads 210 in the first direction more compact, further reducing the space occupied by the liquid distributor unit.

[0069] 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.

[0070] In some specific embodiments of the present application, the connector 300 includes multiple adapter tubes, each having a first adapter port and a second adapter port that communicate with each other. Each first adapter port communicates with one end of the flat tube, and each second adapter port communicates with the end of the capillary tube 220 distal from the liquid dispenser 200. The inner wall of the adapter tube forms a smooth transition from the first adapter port to the second adapter port. This arrangement 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.

[0071] Reference Figure 11 and Figure 12As shown, a throttle member 240 is further provided in the liquid separation head 210. The throttle member 240 is disposed on a side of the capillary tube 220 away from the end of the connecting section 212. The throttle member 240 is provided with a plurality of throttle holes 242, and the plurality of throttle holes 242 are all in communication with the capillary tube 220. Through the above arrangement, when the refrigerant fluid flows through the throttle member 240, the plurality of throttle holes 242 can disturb the refrigerant fluid, making the refrigerant fluid more evenly mixed and evenly distributing the refrigerant entering the plurality of capillary tubes 220, thereby improving the liquid separation effect of the liquid separation part and thus enhancing the heat exchange effect of the heat exchanger.

[0072] Specifically, at least one of the inlet section 211 and the throttle member 240 is provided with a positioning portion 241, and the inlet section 211 and the throttle member 240 are limitedly matched by the positioning portion 241. Through the above arrangement, the positioning portion 241 can prevent the throttle member 240 from falling off under the impact of the refrigerant fluid, thereby ensuring the stability of the installation of the throttle member 240.

[0073] In some embodiments of the present application, the positioning portion 241 can be set in the form of a limiting groove, and there are multiple limiting grooves. The multiple limiting grooves are arranged at annular intervals on the side wall of the throttling member 240, and the inner wall of the liquid separation head 210 is provided with multiple limiting protrusions 214 at circumferential annular intervals. The multiple limiting grooves are arranged corresponding to the multiple limiting protrusions 214. The limiting grooves and the limiting protrusions 214 cooperate with each other to realize the limiting effect of the throttling member 240 along the flow direction of the refrigerant fluid, and can also limit the throttling member 240 circumferentially, further improving the stability of the installation of the throttling member 240.

[0074] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0075] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0076] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0077] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0078] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0079] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A liquid dispenser, characterized in that: The liquid dispenser comprises: A liquid dispensing head (210), the liquid dispensing head (210) comprising an inlet section (211) and a connecting section (212) that are in communication with each other, and a fluid inlet is provided at one end of the inlet section (211) away from the connecting section (212); a capillary tube (220), wherein a plurality of the capillary tubes (220) are provided, and the plurality of the capillary tubes (220) are inserted into the connecting section (212), and the capillary tube (220) is located at one end of the connecting section (212) and communicates with the fluid inlet; 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 chambers; the plurality of capillaries (220) are provided in a one-to-one correspondence with the plurality of separation chambers; one end of the capillary tube (220) is located in the separation chamber; 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 block one end of the connecting section (212) away from the inlet section (211).

2. The liquid dispenser according to claim 1, characterized in that The fixing member (230) has a plurality of fixing arms (231), each of the fixing arms (231) having a connecting end and a free end that are arranged opposite to each other, the connecting ends of the plurality of fixing arms (231) being connected to each other, and the plurality of fixing arms (231) being distributed at intervals around the circumference of the connecting section (212), and forming a plurality of the separation cavities with the inner wall of the connecting section (212).

3. The liquid dispenser according to claim 1, characterized in that The shape of the inner wall of the partition cavity is adapted to the shape of the outer periphery of the capillary tube (220).

4. The liquid dispenser according to claim 1, characterized in that The side wall of the connecting section (212) comprises a connecting portion (2121) and a fitting portion (2122) which are connected to each other. The inner side wall of the fitting portion (2122) is fitted with the outer side wall of the capillary (220). The cross-sectional shape of the fitting portion (2122) along the extension direction is adapted to the cross-sectional shape of the capillary (220) along the extension direction. The connecting portion (2121) is provided between two adjacent fitting portions (2122). The inner wall of the connecting portion (2121) is in contact with and fixedly connected to the fixing member (230).

5. The liquid dispenser according to claim 1, characterized in that In the circumferential direction of the connecting section (212), the distance between two adjacent capillaries (220) is greater than 0.5 mm and less than 5 mm.

6. The liquid dispenser according to claim 1, characterized in that One end of the fixing member (230) away from the inlet section (211) protrudes from the connecting section (212).

7. The liquid dispenser according to claim 6, characterized in that The distance that the fixing member (230) protrudes from the connecting section (212) is L1, and the outer diameter of the capillary tube (220) is D1, where D1≤L1≤5*D1.

8. The liquid dispenser according to claim 1, characterized in that The plurality of capillaries (220) each have an inserting section (221), and the inserting section (221) is inserted into the connecting section (212). A bending section (222) is provided on a side of the plug-in section (221) away from the inlet section (211), and / or the plug-in sections (221) of a plurality of capillaries (220) are arranged parallel to each other.

9. The liquid dispenser according to claim 1, characterized in that 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 fluid inlet is D2, 2*D2-5*D1≤L2≤10*D2-D1, and / or the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary tube (220) is between 0.5 and 3.

10. The liquid dispenser according to claim 1, characterized in that One end of the inlet section (211) away from the connecting section (212) has a bending portion (213), and an angle is formed between the axis of the inlet section (211) and the axis of the bending portion (213).

11. A heat exchanger, characterized in that: The heat exchanger has a liquid separator (200), and the liquid separator (200) is the liquid separator according to any one of claims 1 to 10. The heat exchanger also includes a plurality of heat exchange tubes (100) arranged at intervals along a first direction, and one end of each of the heat exchange tubes (100) is connected to one end of the capillary tube (220) of the liquid separator (200) away from the connection section (212) of the liquid separation head (210).

Images