Liquid separator and heat exchanger with same

Abstract

The utility model 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 one end of the inlet section far away from the connecting section is provided with a fluid inlet; 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 utility model 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] At present, liquid distributors are commonly used in air conditioning systems to evenly distribute refrigerant fluid for heat exchangers. Liquid distributors usually include a liquid distributor head and multiple capillaries, one end of the liquid distributor head is connected to the refrigerant pipeline, and the other end is connected to the multiple capillaries to distribute the refrigerant fluid in the refrigerant pipeline to the multiple capillaries.

[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 moved closer to each other due to gravity, resulting in a small spacing between the capillaries. The capillary action 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. Utility Model Content

[0004] The utility model provides a liquid distributor and a heat exchanger having the same, so as to solve the problem that welding adhesion is easy to occur when welding a capillary in the prior art.

[0005] According to one aspect of the utility model, a liquid dispenser is provided, the liquid dispenser comprises: a liquid dispenser head, the liquid dispenser head has an inlet section and a connecting section which are interconnected, and a fluid inlet is arranged at one end of the inlet section away from the connecting section; a capillary tube, a plurality of capillaries are arranged, the plurality of capillaries are inserted in the connecting section, and the capillary tube is located at one end of the connecting section and is connected with the fluid inlet; a fixing member, the fixing member is arranged in the connecting section, the fixing member and the inner wall of the connecting section form a plurality of partition cavities, the plurality of capillaries are arranged in a one-to-one correspondence with the plurality of partition cavities, one end of the capillary tube is located in the partition 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 blocked.

[0006] By applying the technical solution of the utility model, the dispenser includes a dispenser head, a capillary and a fixing part. When a plurality of capillaries are inserted in the connecting section, two adjacent capillaries are separated by the fixing part, which can prevent the two adjacent capillaries from being too close to each other 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 dispenser head and affecting the welding effect, thereby ensuring the stability of the connection between the capillary and the dispenser head, preventing the capillary from being welded and sticking, and 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 has a plurality of fixing arms, each of which has a connecting end and a free end that are arranged opposite to each other, the connecting ends of the plurality of fixing arms are connected to each other, the plurality of fixing arms are distributed at intervals around the circumference of the connecting section, and form a plurality of partition cavities with the inner wall of the connecting section. Through the above arrangement, the fixing arms can prevent 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 shape of the outer periphery of the capillary. Through the above arrangement, the gaps among the capillary, the fixed arm and the connecting section can be blocked 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 connected to each other, the inner side wall of the matching portion fits the outer side wall of the capillary, the cross-sectional shape of the matching portion along the extension direction matches the cross-sectional shape of the capillary along the extension direction, a 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. Through the above arrangement, the space inside the connecting section can be made more compact, and the liquid separation effect of the liquid separation head can be improved.

[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 liquid separation effect of the liquid dispenser can be ensured while reducing the capillary action between two adjacent capillaries.

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

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

[0013] Furthermore, the multiple capillaries all have plug-in sections, the plug-in sections are plugged in the separation cavity, a bending section is provided on the side of the plug-in section away from the inlet section, and / or the plug-in sections of the multiple capillaries are arranged parallel to each other. Through the above arrangement, the multiple capillaries can be further separated, the distance between the capillaries is increased, and the phenomenon of welding adhesion can be prevented.

[0014] Furthermore, the matching length between the capillary 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 is between 0.5 and 3. Through the above arrangement, the connection strength between the capillary and the liquid dispensing head can be guaranteed while ensuring the production cost, and the liquid dispensing effect of the liquid dispenser can be guaranteed.

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

[0016] According to another aspect of the utility model, a heat exchanger is provided, the heat exchanger has a liquid separator, the liquid separator is the above-mentioned liquid separator, and the heat exchanger also includes a plurality of heat exchange tubes arranged at intervals along a first direction, and one end of each heat exchange tube is connected to one end of the connection section of the capillary of the liquid separator away from the liquid separator head. Through the above arrangement, it is possible to reduce the material waste caused by the heat exchanger in the production process and reduce the overall production cost of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 The structure diagram of the liquid dispenser provided by the embodiment of the utility model is shown;

[0019] Figure 2 A side view of a liquid dispenser provided in a first embodiment of the utility model is shown;

[0020] Figure 3 A side view of a liquid dispenser provided in a second embodiment of the present utility model is shown;

[0021] Figure 4 A cross-sectional view of a liquid dispenser provided in a third embodiment of the present utility model is shown;

[0022] Figure 5 The structure diagram of the liquid dispenser provided in the fourth embodiment of the utility model is shown;

[0023] Figure 6 A front view of a heat exchanger provided in a fifth embodiment of the utility model is shown;

[0024] Figure 7 The structure diagram of the heat exchanger provided by the sixth embodiment of the utility model is shown;

[0025] Figure 8 A front view of a heat exchanger provided in a sixth embodiment of the utility model is shown;

[0026] Fig. 9 A top view of a heat exchanger provided in a sixth embodiment of the present utility model is shown;

[0027] Fig.10 A side view of a heat exchanger provided in a sixth embodiment of the present utility model is shown;

[0028] Fig.11 The structure diagram of the throttling device provided by the utility model is shown;

[0029] Fig.12 A cross-sectional view showing the cooperation between the throttling element and the liquid distributor provided by the utility model is shown.

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

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

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

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

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

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

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

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

[0038] 300. Connectors. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0040] like Figure 1 As shown, the embodiment of the utility model provides a liquid dispenser, which includes a liquid dispenser head 210, a capillary 220 and a fixing member 230. The liquid dispenser head 210 has an inlet section 211 and a connecting section 212 that are connected to each other, and a fluid inlet is provided at one end of the inlet section 211 away from the connecting section 212, and a plurality of capillaries 220 are provided, and the plurality of capillaries 220 are inserted in the connecting section 212, and the capillary 220 is located at one end of the connecting section 212 and communicates with the fluid inlet, and the fixing member 230 is arranged in the connecting section 212, and the fixing member 230 and the inner wall of the connecting section 212 form a plurality of partition chambers, and the plurality of capillaries 220 are arranged one-to-one with the plurality of partition chambers, and one end of the capillary 220 is located in the partition chamber, and any two adjacent capillaries 220 are separated by the fixing member 230, and 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] By applying the technical solution of the present invention, the dispenser includes a dispenser head 210, a capillary 220 and a fixing member 230. When a plurality of capillaries 220 are inserted into the connecting section 212, two adjacent capillaries 220 are separated by the fixing member 230, so that the two adjacent capillaries 220 can be prevented from being too close to each other 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 capillaries 220, and preventing the molten flux from flowing along the capillary 220 under the capillary action when the capillary 220 is welded to the dispenser head 210 and affecting the welding effect, thereby ensuring the stability of the connection between the capillary 220 and the dispenser head 210, preventing the capillary 220 from being welded and sticking, and 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, the fixing arms 231 have connecting ends and free ends that are relatively arranged, the connecting ends of the plurality of fixing arms 231 are connected to each other, the plurality of fixing arms 231 are distributed at intervals around the circumference of the connecting section 212, and form a plurality of separation chambers with the inner wall of the connecting section 212. Through the above arrangement, when the capillary 220 is inserted into the connecting section 212, the fixing arms 231 can stop the 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, and by setting the connecting ends of the plurality of fixing arms 231 to be connected to each other, the capillary 220 is located between the two adjacent fixing arms 231, and on the basis of separating the two adjacent capillaries 220, the plurality of capillaries 220 can be aggregated together to ensure the liquid separation effect of the liquid dispenser. Specifically, the fixing arms 231 can be set to 3, 4 or 5, and can be adjusted according to the application situation 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 member 230. When welding the capillary 220, the solder can block 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 fixed arm 231 facing the capillary 220 is adapted to the outer peripheral shape of the capillary 220, so that the shape of the inner wall of the partition cavity is adapted to the outer peripheral shape of the capillary 220. Through the above arrangement, the stability of the capillary 220 inserted in the connecting section 212 can be ensured, which is convenient for welding the capillary 220. At the same time, the gap between the capillary 220, the fixed arm 231 and the connecting section 212 can be blocked as much as possible to ensure 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 connected to each other, the inner side wall of the matching portion 2122 is fitted 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, and a connecting portion 2121 is provided between two adjacent matching portions 2122, and the inner wall of the connecting portion 2121 is abutted and fixedly connected with the fixing member 230. Through the above arrangement, the space inside the connecting section 212 can be made more compact as much as possible, the liquid separation effect of the liquid separation head 210 can be improved, and the space occupied by the connecting section 212 can also be reduced, which is conducive to the miniaturization of the liquid separator.

[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 the capillary action between the two adjacent capillaries 220 cannot be reduced; 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, the liquid separation effect of the liquid dispenser can be guaranteed while reducing the capillary action between the two adjacent capillaries 220. 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 gap can be formed between the multiple capillary tubes 220 located inside the connecting section 212, but the multiple 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, and further improving the function of the fixing member 230 to separate 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 easy to cause material waste. In the present application, by setting D1≤L1≤5*D1, the separation effect of the fixing member 230 on the capillaries 220 outside the connecting section 212 can be ensured, 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 a specific embodiment of the present application, a bending section 222 is provided on one side of the plug section 221 away from the inlet section 211. By providing the bending section 222, the multiple capillaries 220 can be further separated, the distance between the capillaries 220 can be increased, and the phenomenon of welding adhesion can be prevented. Specifically, the bending directions of the bending sections 222 of the multiple capillaries 220 can be bent toward each other or in opposite directions, as long as the spacing between the multiple capillaries 220 can be increased, and can be adjusted according to the specific settings 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 dispensing head 210 can be reduced, the overall occupied space of the liquid dispenser can be reduced, and the spatial layout of the connecting pipelines can be facilitated.

[0052] In another specific embodiment of the present application, a bending section 222 is provided on the side of the plug section 221 away from the inlet section 211, and the plug sections 221 of the plurality of capillaries 220 are arranged parallel to each other. Through the above arrangement, it is possible to adjust the layout of the liquid distributor and the capillary tube 220 while reducing the overall occupied space of the liquid distributor, thereby reducing the occupied space of the heat exchanger.

[0053] In one embodiment of the present application, the matching 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 matching 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 matching 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, affecting 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 220 is between 0.5-3. When the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary 220 is less than 0.5, the ratio of the flow area of ​​the fluid 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 distributor; when the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary 220 is greater than 3, the ratio of the flow area of ​​the fluid 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 fluid inlet to the flow area of ​​the capillary 220 between 0.5-3, the liquid separation effect of the liquid distributor can be ensured while ensuring the flow efficiency of the refrigerant fluid. Specifically, the ratio of the flow area of ​​the fluid inlet to the flow area of ​​the capillary 220 can be set to 0.5, 1, 2 or 3.

[0055] In another specific embodiment of the present application, the matching 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. Through the above arrangement, the connection effect between the capillary tube 220 and the liquid distributor can be ensured, and the circulation effect of the refrigerant fluid when flowing through the liquid distributor can be improved.

[0056] Furthermore, there is a transition section 215 between the connecting section 212 and the inlet section 211, and the flow area of ​​the transition section 215 gradually increases from the inlet section 211 to the connecting section 212. Through the above arrangement, the pressure loss of the refrigerant fluid in the liquid separation head 210 can be reduced, making the circulation 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 bent portion 213, and an angle is formed between the axis of the inlet section 211 and the axis of the bent portion 213. Through the above arrangement, the spatial layout of the liquid distributor when connected to the heat exchanger and the refrigerant pipeline can be facilitated, and the space occupied by the heat exchanger can be reduced.

[0059] like Figures 6 to 10As shown, an embodiment of the utility model further provides a heat exchanger, which has a liquid separator 200, and the liquid separator 200 is the above-mentioned liquid separator. The heat exchanger also 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 capillary 220 of the liquid separator 200 away from the connecting section 212 of 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 multiple capillaries 220. The capillary 220 of the upper stage liquid separator 200 is connected with the liquid separator head 210 of the lower stage liquid separator 200. The capillary 220 connected with the heat exchange tube 100 forms a refrigerant outlet, and the capillary 220 connected with the lower stage liquid separator 200 is bent in the first direction toward the direction of the liquid separator head 210 of the same stage liquid separator 200.

[0060] By arranging a multi-stage liquid distributor 200 to be connected in series in sequence and a distribution scheme in which multiple liquid distributors 200 of the same stage are connected in parallel with each other, the capillary tube 220 can be directly connected to the heat exchange tube 100, which is beneficial to the uniform distribution of the refrigerant, and can reduce the volume of the liquid distributor head 210, so that the flow area of ​​the refrigerant fluid will not change significantly, which is beneficial to the flow of the refrigerant fluid; and, by arranging the capillary tube 220 connected to the next-stage liquid distributor 200 to bend in the first direction toward the direction of the liquid distributor head 210 of the same-stage liquid distributor 200, the spacing between the multiple capillaries 220 of the same-stage liquid distributor 200 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 distributor 200 connected to the heat exchange tube 100, so as to prevent the molten 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 a first direction toward the direction of the dispenser 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 has an angle with the extension direction of the heat exchange tube 100 in the first direction. Through the above arrangement, the spacing between the multiple liquid distributors 200 connected to the heat exchange tube 100 can be reduced, and the distance between the capillaries 220 of the upper-stage liquid distributor 200 can be further reduced, 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 capillaries 2012, the second liquid distributor 202 has a second liquid distributor head 2021 and a plurality of second capillaries 2022, each second liquid distributor head 2021 is connected to the first capillary 2012 in a one-to-one correspondence, each second capillary 2022 is connected to the heat exchange tube 100 in a one-to-one correspondence, the first liquid distributor head 2011 has a refrigerant inlet, the first liquid distributor head 2011 is located in the middle of the plurality of heat exchange tubes 100 in the first direction, and the plurality of first capillaries 2012 are bent in the first direction toward the direction of 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 except 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-dispensing heads 2021 may also be inclined toward the middle in the first direction, so that the distance between the plurality of second liquid-dispensing heads 2021 can be reduced, thereby reducing the occupied space of the liquid-dispensing part as a whole.

[0067] In some feasible embodiments of the present application, in the liquid distributor 200 of the same level connected to the heat exchange tube 100, the axis of at least one liquid distributor head 210 is not on the plane formed by the center lines of the multiple heat exchange tubes 100. Through the above arrangement, the liquid distributor head 210 whose axis is not on the plane formed by the center lines of the multiple heat exchange tubes 100 can avoid the remaining liquid distributor heads 210, so that the remaining liquid distributor heads 210 are close to each other, further reducing the overall occupied volume of the liquid distributor in the first direction, 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, in the liquid distributor 200 of the same level connected to the heat exchange tube 100, two adjacent liquid distributor heads 210 are respectively located on both sides of the plane formed by the center lines of the plurality of heat exchange tubes 100. Through the above 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 plurality of heat exchange tubes 100, and the distance between the two adjacent liquid distributor heads 210 can be further reduced, so that the arrangement of the plurality of liquid distributor heads 210 in the first direction is more compact, and the occupied space of the liquid distributor part is further reduced.

[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 along the length direction and the width direction. 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 and affect 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 caused 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 a plurality of transfer tubes, each of which has a first transfer port and a second transfer port that are interconnected, each of which is connected to one end of the flat tube, and each of which is connected to one end of the capillary 220 away from the liquid dispenser 200, and the inner wall of the transfer tube is formed in a smooth transition from the first transfer port to the second transfer port. Through the above arrangement, the amplitude of the cross-sectional shape change of the inner wall of the connector 300 can be reduced, and the influence of the cross-sectional shape change of the flow channel on the circulation of the refrigerant fluid can be further reduced, thereby improving the efficiency of the fluid circulation.

[0071] Reference Fig.11 and Fig.12As shown, a throttle 240 is also provided in the liquid separation head 210. The throttle 240 is provided on a side of the capillary 220 away from the port of the connecting section 212. The throttle 240 is provided with a plurality of throttle holes 242, and the plurality of throttle holes 242 are all connected to the capillary 220. Through the above arrangement, when the refrigerant fluid flows through the throttle 240, the plurality of throttle holes 242 can disturb the refrigerant fluid, so that the refrigerant fluid is mixed more evenly, and the refrigerant entering the plurality of capillaries 220 is evenly distributed, thereby improving the liquid separation effect of the liquid separation part, and thus improving the heat exchange effect of the heat exchanger.

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

[0073] In some embodiments of the present application, the positioning portion 241 can be configured in the form of a limiting groove, and a plurality of limiting grooves are provided. The plurality of 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 a plurality of limiting protrusions 214 at circumferential annular intervals. The plurality of limiting grooves and the plurality of limiting protrusions 214 are arranged correspondingly, and the limiting grooves and the limiting protrusions 214 cooperate with each other to realize the limiting effect on the throttling member 240 along the flow direction of the refrigerant fluid, and can also limit the throttling member 240 circumferentially, thereby 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0075] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. 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 the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method 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 exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain 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 utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model 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, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours 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 here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0079] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

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) which are connected to 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 in the connecting section (212), and the capillary tube (220) is located at one end of the connecting section (212) and is connected to the fluid inlet; A fixing member (230), wherein the fixing member (230) is arranged in the connecting section (212), and the fixing member (230) and the inner wall of the connecting section (212) form a plurality of partition chambers, and the plurality of capillaries (220) are arranged 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, and any two adjacent capillaries (220) are separated by the fixing member (230), and 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), the fixing arms (231) having connecting ends and free ends that are arranged opposite to each other, the connecting ends of the plurality of fixing arms (231) are connected to each other, the plurality of fixing arms (231) are distributed at intervals around the circumference of the connecting section (212), and form a plurality of 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 matching portion (2122) which are connected to each other, the inner side wall of the matching portion (2122) is fitted 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, the connecting portion (2121) is arranged between two adjacent matching portions (2122), and the inner wall of the connecting portion (2121) is abutted against 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: Each of the plurality of capillaries (220) has 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 matching length between the capillary (220) and the connecting section (212) is L2, the outer diameter of the capillary (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 (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 described in 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 connecting section (212) of the liquid separator head (210).

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