Liquid distributor and air conditioner

Abstract

The present application relates to air conditioning technical field, especially a kind of distributor and air conditioner, distributor includes outer tube body and inner tube body, outer tube body is set in the outside of inner tube body, and with inner tube body connection surrounds and sets out distribution cavity, the inner wall of inner tube body is equipped with at least one first groove, first groove extends along the axial direction of inner tube body, first groove is equipped with the spray hole being communicated with distribution cavity.In the inner wall of inner tube body, first groove is extended along the axial direction of inner tube body, and inner thread structure is formed, then the refrigerant entering inner tube body meets first groove, and flow direction is changed under the flow guiding effect of first groove, from the original axial vertical upward flow along inner tube body to spiral rotation rising, and according to the number of first groove, the flow form of same flow but different flow path of refrigerant flow is formed in inner tube body, so that the originally gas-liquid separated refrigerant is re-rotated and mixed, and the distribution is more uniform.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a liquid distributor and an air conditioner. Background Technology

[0002] In air conditioning systems, the distributor allocates the two-phase refrigerant (gas and liquid) to the evaporator. Uneven refrigerant distribution can lead to incomplete evaporation in branches with high flow rates and premature evaporation in branches with low flow rates, affecting heat exchange performance. Existing distributor solutions mainly include Venturi distributors and integrated distributors. However, Venturi distributors suffer from high cost and large size. Integrated distributors combine the functions of a Venturi distributor and a capillary tube, using variations in the distribution orifices within the distributor tube to regulate refrigerant flow. However, when an integrated distributor has too many nozzles in its inner tube, the mutual interference between these nozzles makes flow regulation difficult. Summary of the Invention

[0003] This invention provides a liquid distributor and an air conditioner to address one of the deficiencies in the prior art. A first groove extending along the axial direction of the inner tube is provided on the inner wall of the inner tube to form an internal thread structure. When the refrigerant entering the inner tube encounters the first groove, its flow direction changes under the guiding effect of the first groove. It changes from the original vertical upward flow along the axial direction of the inner tube to a spiral rotational upward flow. Depending on the number of first grooves, the refrigerant is distributed in the inner tube to form a flow pattern with the same refrigerant flow rate but different flow paths, so that the originally gas-liquid separated refrigerant is re-rotated and mixed, and the distribution is more uniform.

[0004] The present invention provides a liquid dispenser, comprising an outer tube and an inner tube. The outer tube is sleeved on the outside of the inner tube and connected to the inner tube to form a liquid dispensing chamber. The inner wall of the inner tube is provided with at least one first groove, which extends spirally along the axial direction of the inner tube. The first groove is provided with a spray hole communicating with the liquid dispensing chamber.

[0005] According to a liquid separator provided by the present invention, the inner wall of the inner tube is provided with a plurality of first grooves, and the plurality of first grooves extend parallel to each other.

[0006] According to a liquid separator provided by the present invention, a plurality of first grooves are evenly distributed circumferentially on the inner wall of the inner tube.

[0007] According to a liquid separator provided by the present invention, the outer wall of the inner tube is provided with at least two second grooves, the second grooves are recessed into the inner wall of the inner tube to form a protrusion on the inner wall of the inner tube, and the first groove is restricted between two adjacent protrusions.

[0008] According to a liquid dispenser provided by the present invention, each of the protrusions extends from the inner wall of the inner tube towards the center of the inner tube and is connected to each other.

[0009] According to a liquid dispenser provided by the present invention, a plurality of spray holes are uniformly distributed in the first groove along the extending direction of the first groove.

[0010] According to a liquid separator provided by the present invention, the ratio of the depth of the first groove to the inner wall radius of the inner tube is between 0.37 and 1; the depth of the first groove is negatively correlated with the refrigerant flow rate of the inner tube.

[0011] According to the present invention, a distributor is provided in which the refrigerant flow rate entering the inner tube is between 200 and 400 m³. 3 In the case of / h, the number of the first grooves is between 6 and 10.

[0012] According to a liquid separator provided by the present invention, at least one of a filter screen and a guide vane is provided at the liquid inlet of the inner tube.

[0013] The present invention also provides an air conditioner, including the liquid dispenser as described above.

[0014] In this embodiment of the liquid separator, an outer tube and an inner tube together form a main tube. The outer tube is sleeved on the outside of the inner tube, and both its upper and lower ends are sealed to the outer wall of the inner tube. Thus, the space between the outer wall of the inner tube and the inner wall of the outer tube forms a liquid-dispensing cavity. In other words, the outer tube surrounds the liquid-dispensing cavity on the outside of the inner tube. Multiple branch tubes are connected to the outer tube and communicate with the liquid-dispensing cavity. The inner wall of the inner tube has a first groove extending spirally along the axial direction. Inside the groove, within the range corresponding to the liquid-dispensing cavity, are spray holes communicating with the liquid-dispensing cavity.

[0015] Since the two-phase refrigerant after the valve often needs to pass through U-bends and right-angle bends in the pipe assembly before entering the distributor, if the refrigerant directly enters the inner tube, gas-liquid separation will occur under the action of centrifugal force. The refrigerant entering the inner tube will form a mist-like flow and a partially gas-liquid separated annular flow, resulting in uneven refrigerant distribution in the horizontal direction. This invention provides a first groove extending along the axial direction of the inner tube on the inner wall, forming an internal thread structure. When the refrigerant entering the inner tube encounters the first groove, its flow direction will change under the guiding effect of the first groove, changing from the original vertical upward flow along the axial direction of the inner tube to a spiral rotational upward flow. Depending on the number of first grooves, the refrigerant will be distributed in the inner tube to form a flow pattern with the same refrigerant flow rate but different flow paths, causing the originally gas-liquid separated refrigerant to re-mix and rotate, resulting in a more uniform distribution.

[0016] When the refrigerant in the first groove rotates to the vicinity of the nozzle, it will be discharged from the nozzle into the dispensing chamber, thereby reducing the problem of liquid refrigerant accumulation at the top of the dispensing chamber. The dispenser of the present invention simplifies the integrated dispensing debugging, reduces the integrated dispensing debugging time, and realizes the flow distribution by first uniformly distributing and then distributing according to resistance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the liquid dispenser provided in an embodiment of the present invention; Figure 2 This is a top view of the inner tube of the liquid separator provided in an embodiment of the present invention; Figure 3 This is one of the structural schematic diagrams of the inner tube of the liquid separator provided in the embodiments of the present invention; Figure 4 This is a second schematic diagram of the inner tube of the liquid separator provided in this embodiment of the invention; Figure 5 This is one of the schematic diagrams of the cross-sectional structure of the inner tube of the liquid separator provided in the embodiments of the present invention; Figure 6 This is a second schematic diagram of the cross-sectional structure of the inner tube of the liquid separator provided in this embodiment of the invention; Figure 7 This is the third schematic diagram of the inner tube of the liquid separator provided in this embodiment of the invention; Figure 8 This is the fourth schematic diagram of the inner tube of the liquid separator provided in this embodiment of the invention; Figure 9 This is one of the cross-sectional views of the liquid separator provided in the embodiments of the present invention; Figure 10 This is the fifth schematic diagram of the inner tube of the liquid separator provided in this embodiment of the invention; Figure 11 yes Figure 9 A magnified view of part A in the middle.

[0019] Figure label: 100. Outer tube body; 200, Inner tube body; 210, Exhaust port; 220, Spray nozzle; 230, One-way flow channel; 231, Main flow channel; 232, Resistance flow channel; 240, Protrusion; 250, First groove; 260, Second groove; 300, Separating chamber; 400, Branch tube body; 500, Filter screen; 600, Guide vane. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0023] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0025] The integrated distributor consists of three main parts: an inner tube, an outer tube, and a branch tube. The outer tube has multiple openings in its wall for inserting the branch tube. The inner tube has several nozzles for the refrigerant to enter the dispensing chamber. Compared to traditional Venturi distributors, the integrated distributor has advantages such as smaller size and lower cost.

[0026] However, since the refrigerant entering the distributor is in a gas-liquid mixed state, when there is a bend or other structure in front of the distributor, the gas and liquid refrigerant will separate under the influence of centrifugal force and gravity. In addition, even if there is no bend in front of the distributor, when the distributor is high, due to the high density and low flow velocity of the liquid refrigerant, the liquid refrigerant will gradually converge on the wall and form a ring flow during the upward flow.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the liquid dispenser provided in this embodiment of the invention includes an outer tube 100 and an inner tube 200. The outer tube 100 is sleeved on the outside of the inner tube 200 and connected to the inner tube 200 to form a liquid dispensing chamber 300. The inner wall of the inner tube 200 is provided with at least one first groove 250. The first groove 250 extends spirally along the axial direction of the inner tube 200. The first groove 250 is provided with a spray hole 220 communicating with the liquid dispensing chamber 300.

[0028] In this embodiment of the liquid separator, the outer tube 100 and the inner tube 200 together form the main body. The outer tube 100 is sleeved on the outside of the inner tube 200, and both the upper and lower ends of the outer tube 100 are closedly connected to the outer wall of the inner tube 200. Thus, the space between the outer wall of the inner tube 200 and the inner wall of the outer tube 100 forms a liquid separation chamber 300. That is, the outer tube 100 surrounds the liquid separation chamber 300 on the outside of the inner tube 200. Multiple branch tubes 400 are connected to the outer tube 100 and communicate with the liquid separation chamber 300. The inner wall of the inner tube 200 is provided with a first groove 250 extending spirally along the axial direction. The interior of the groove, within the range corresponding to the liquid separation chamber 300, is provided with spray holes 220 communicating with the liquid separation chamber 300.

[0029] Since the two-phase refrigerant after the valve often needs to pass through U-bends and right-angle bends in the pipe assembly before entering the distributor, if the refrigerant directly enters the inner tube 200 at this point, gas-liquid separation will occur under the action of centrifugal force. The refrigerant entering the inner tube 200 will form a mist-like flow and a partially gas-liquid separated annular flow, resulting in uneven refrigerant distribution in the horizontal direction. This invention provides a first groove 250 extending axially along the inner wall of the inner tube 200, forming an internal thread structure. When the refrigerant entering the inner tube 200 encounters the first groove 250, its flow direction changes under the guiding effect of the first groove 250, changing from the original vertical upward flow along the axial direction of the inner tube 200 to a spiral rotational upward flow. Depending on the number of first grooves 250, the refrigerant is distributed in the inner tube 200 in different flow paths but with the same flow rate, causing the originally gas-liquid separated refrigerant to re-mix and distribute more evenly.

[0030] When the refrigerant in the first groove 250 rotates to the vicinity of the nozzle 220, it will be discharged from the nozzle 220 into the dispensing chamber 300, thereby reducing the problem of liquid refrigerant accumulation at the top of the dispensing chamber 300. The dispenser of the present invention can simplify the integrated dispensing debugging, reduce the integrated dispensing debugging time, and realize the flow distribution by first uniformly distributing and then distributing according to resistance.

[0031] According to an embodiment of the present invention, the inner wall of the inner tube 200 is provided with a plurality of first grooves 250, which extend parallel to each other. In this embodiment, at least two first grooves 250 are provided in the inner tube 200, each first groove 250 extending spirally along the axial direction of the inner tube 200, and the plurality of first grooves 250 extending parallel to each other. Each first groove 250 has the same depth and width and does not interfere with each other. The refrigerant entering the inner tube 200 can be distributed into different flow paths with the same refrigerant flow rate through the plurality of first grooves 250, so that the refrigerant is first evenly distributed through the first grooves 250 and then distributed into the liquid distribution chamber 300 through the spray holes 220 in the first grooves 250, which simplifies the design difficulty of the spray holes 220 on the inner tube 200.

[0032] According to one embodiment of the present invention, a plurality of first grooves 250 are uniformly distributed circumferentially on the inner wall of the inner tube 200. In this embodiment, the plurality of first grooves 250 are uniformly distributed circumferentially on the inner wall of the inner tube 200, that is, a plurality of first grooves 250 are uniformly distributed on any cross-section of the inner tube 200. Each first groove 250 is independent of each other and does not affect each other. The uniform distribution is beneficial to the uniformity and consistency of the refrigerant flow rate when the refrigerant entering the inner tube 200 is distributed to each first groove 250, further improving the liquid distribution effect.

[0033] In one embodiment, four first grooves 250 are provided inside the inner tube body 200, and eight first grooves 250 may also be provided to form an inner tube body 200 in the form of an internally threaded tube. Each first groove 250 has the same depth and width, which is equivalent to dividing the refrigerant entering the inner tube body 200 into four or eight parts.

[0034] like Figure 4 As shown, according to an embodiment of the present invention, the outer wall of the inner tube 200 is provided with at least two second grooves 260. The second grooves 260 are recessed into the inner wall of the inner tube 200 to form a protrusion on the inner wall of the inner tube 200, and a first groove 250 is defined between two adjacent protrusions. In this embodiment, while the inner wall of the inner tube 200 is provided with the first groove 250, the outer wall of the inner tube 200 may also have the second grooves 260. To facilitate the processing of the first groove 250 of the inner tube 200, due to the influence of the processing technology, while the first groove 250 is directly processed on the inner wall of the inner tube 200, the second grooves 260 are formed on the outer wall of the inner tube 200. The second grooves 260 are recessed into the inner tube 200, thereby forming a protrusion on the inner wall of the inner tube 200. The two second grooves 260 correspond to the two protrusions, and the space between the two protrusions is the first groove 250.

[0035] Thus, on the one hand, the processing operation is feasible, and on the other hand, the processing depth of the first groove 250 and the protrusion height of the protrusion can ensure that the depth of the first groove 250 after forming meets the requirements.

[0036] According to one embodiment of the present invention, each protrusion extends from the inner wall of the inner tube 200 toward the center of the inner tube 200 and is interconnected. In this embodiment, the protrusions extend spirally along the axial direction of the inner tube 200 in the length direction, and extend from the inner wall of the inner tube 200 toward the center of the inner tube 200 in the height direction, until the ends of each protrusion in the height direction are concentrated at the center of the inner tube 200 and connected.

[0037] In this embodiment, the interior of the inner tube 200 is divided into multiple flow channels by protruding connections, and each flow channel extends spirally. In other embodiments, multiple irregularly shaped tubes with different cross-sections can be spirally twisted to achieve parallel merging, and the refrigerant is automatically distributed into each flow channel when it enters the inner tube 200.

[0038] In this embodiment, the four protrusions divide the interior of the inner tube 200 into four flow channels.

[0039] According to one embodiment of the present invention, a plurality of nozzles 220 are uniformly distributed within the first groove 250 along the extending direction of the first groove 250. In this embodiment, the nozzles 220 can penetrate from the bottom wall of the first groove 250 to the outer wall of the inner tube 200, and the nozzles 220 are uniformly distributed within the first groove 250 along the spiral extending direction, which can ensure the uniform distribution of refrigerant into the dispensing chamber 300 in each flow path.

[0040] Because the first groove 250 extends spirally within the inner tube 200, the nozzles 220 provided within the first groove 250 are also spirally distributed on the inner tube 200. This means that a nozzle 220 provided within a single first groove 250 can achieve omnidirectional and all-angle liquid distribution along the entire height and circumferential direction of the liquid distribution chamber 300. Multiple uniformly or regularly distributed nozzles 220 can be provided within each first groove 250, thereby enabling nozzles 220 with different orientations along the circumference of the inner tube 200. This effectively avoids the uneven liquid distribution problem that occurs when the refrigerant undergoes gas-liquid separation and the nozzles 220 are only distributed on one side of the inner tube 200.

[0041] In one embodiment, to ensure uniform liquid separation, the nozzles 220 in two adjacent first grooves 250 can be spaced apart, and all the nozzles 220 in the first grooves 250 of the inner tube 200 can be spaced apart from each other.

[0042] like Figure 5 and Figure 6 As shown, according to an embodiment of the present invention, the ratio of the depth of the first groove 250 to the inner wall radius of the inner tube 200 is between 0.37 and 1; the depth of the first groove 250 is negatively correlated with the refrigerant flow rate of the inner tube 200. In this embodiment, in order to ensure that the refrigerant flow paths formed by each first groove 250 do not affect each other, the ratio of the depth of the first groove 250 to the inner wall radius of the inner tube 200 is controlled to be between 0.37 and 1. If it is less than this ratio, the refrigerant streams are prone to affect each other, and the actual refrigerant flow rate in the inner tube 200 is negatively correlated with the depth of the first groove 250, for example, the refrigerant flow rate is 300~400m³. 3 When the ratio is / h, the ratio is between 0.45 and 0.6.

[0043] In this embodiment, the inner tube 200 is uniformly divided into four first grooves 250 along its circumference by a protrusion at the center of the inner tube 200 outward, that is, the ratio of the depth of the first groove 250 to the inner wall radius of the inner tube 200 is controlled at 1.

[0044] According to one embodiment of the present invention, the refrigerant flow rate entering the inner pipe 200 is between 200 and 400 m³. 3In the case of / h, the number of first grooves 250 is between 6 and 10. In this embodiment, under the premise of uniform refrigerant distribution, the pressure loss of each flow path is different by varying the diameter and number of nozzles 220 in each first groove 250, thereby achieving different refrigerants in each flow path and matching the flow rate and air field. Considering the application scenario and requirements of the distributor, the refrigerant flow rate range entering the distributor is limited, and the number of first grooves 250 in the inner tube 200 and the distribution number and distribution pattern of nozzles 220 on each first groove 250 are determined in combination with the distribution effect.

[0045] In this embodiment, the number of nozzles 220 is positively correlated with the refrigerant flow rate of the inner tube 200. The number of nozzles 220 is 0.03-0.06 of the refrigerant flow rate. For example, if the refrigerant flow rate of the inner tube 200 is 300m³ / min... 3 / h, the number of nozzles 220 is 10-16, and the number of first grooves 250 is controlled to be an integer multiple of the number of nozzles 220, so the number of first grooves 250 is also 10-16.

[0046] like Figure 7 and Figure 8 As shown, according to an embodiment of the present invention, at least one of a filter screen 500 and a guide vane 600 is provided at the liquid inlet of the inner tube 200. In this embodiment, in order to solve the problem of flow deviation caused by the bend in the pipeline before the distributor, the refrigerant is rectified before entering the distributor to keep the refrigerant entering the inner tube 200 as mixed as possible. Therefore, a rectifier is provided at the liquid inlet of the inner tube 200.

[0047] In one embodiment, a filter screen 500 is installed at the liquid inlet of the inner pipe body 200. This means that the refrigerant passes through the filter screen 500 before entering the inner pipe body 200 from the bend. The filter screen 500 is a common component in air conditioning circulation systems, its function being to filter impurities in the pipes, preventing impurities from clogging the electronic expansion valve and preventing impurities from entering the compressor and damaging it. Adding a filter screen 500 before the distributor not only filters impurities but also acts as a rectifying agent. When the refrigerant undergoes gas-liquid separation and passes through the filter screen 500, the liquid refrigerant is dispersed by the small holes on the filter screen and remixes with the gaseous refrigerant, thus achieving a rectifying effect.

[0048] In one embodiment, a guide vane 600 is provided at the liquid inlet of the inner tube 200, meaning that the refrigerant passes through the guide vane 600 before entering the inner tube 200 from the bend. The guide vane 600 has a series of inclined vanes. When the refrigerant passes through, the flow direction of the refrigerant changes under the guiding effect of the inclined vanes, changing from the original straight flow to a rotating flow. During the rotation process, the gas and liquid two-phase refrigerant will mix, thereby disrupting gas-liquid separation.

[0049] In other embodiments, the shape, number of blades, and tilt angle of the guide vane 600 may be different.

[0050] like Figure 9 , Figure 10 and Figure 11 As shown, according to an embodiment of the present invention, the inner tube 200 is provided with a one-way flow channel 230 communicating with the liquid distribution chamber 300. The one-way flow channel 230 is located below the nozzle 220 so that the refrigerant flows from the liquid distribution chamber 300 into the lumen of the inner tube 200. The outer tube 100 is provided with a plurality of branch tubes 400 communicating with the liquid distribution chamber 300.

[0051] In this embodiment, the inner tube 200 is provided with a one-way flow channel 230 and a nozzle 220 within the liquid distribution chamber 300. The lumen of the inner tube 200 is connected to the liquid distribution chamber 300 through the one-way flow channel 230, and the nozzle 220 is located above the one-way flow channel 230.

[0052] When the heat exchanger functions as an evaporator, the refrigerant enters the cavity of the inner tube 200 and can be ejected from the nozzle 220 into the distribution chamber 300, but it cannot enter the distribution chamber 300 from the inner tube 200 through the one-way flow channel 230. The refrigerant in the distribution chamber 300 can flow back into the cavity of the inner tube 200 through the one-way flow channel 230 and re-enter the distribution chamber 300 along with the refrigerant in the inner tube 200, thereby achieving the circulation of the refrigerant between the distribution chamber 300 and the inner tube 200.

[0053] When the air conditioning system reverses direction and the heat exchanger acts as a condenser, the liquid refrigerant flows back to the branch pipe body 400 through different flow paths of the heat exchanger. It then enters the liquid distribution chamber 300 between the inner pipe body 200 and the outer pipe body 100 through the branch pipe body 400. As the liquid refrigerant flows downward, it gradually converges in the liquid distribution chamber 300. It can first flow into the cavity of the inner pipe body 200 through the one-way flow channel 230 located below the nozzle 220, and then flow out of the distributor from the lower port of the inner pipe body 200.

[0054] The one-way flow channel 230 is a special flow channel structure that enables unidirectional flow, allowing refrigerant to flow from the liquid distribution chamber 300 into the inner tube body 200. Additionally, the one-way flow channel 230 facilitates smooth oil return, allowing compressor oil to be discharged promptly and preventing oil accumulation. Without this channel, compressor oil would accumulate in the liquid distribution chamber 300 between the inner tube body 200 and the outer tube body 100 and would not be able to drain.

[0055] According to one embodiment of the present invention, the unidirectional flow channel 230 is located at the bottom of the liquid distribution chamber 300. In this embodiment, the upper port of the inner tube 200 is inserted into the interior of the outer tube 100 from the lower port of the outer tube 100. The lower port of the outer tube 100 is closedly connected to the outer wall of the inner tube 200. The upper port of the inner tube 200 is located outside the outer tube 100, and the bottom of the liquid distribution chamber 300 is located at the lower end of the outer tube 100. The unidirectional flow channel 230 is positioned in the inner tube 200 at the lower end of the outer tube 100, i.e., at the bottom of the liquid distribution chamber 300.

[0056] The one-way flow channel 230 is located at the bottom of the liquid distribution chamber 300. After the liquid refrigerant enters the liquid distribution chamber 300 through the branch pipe 400, it ensures that the liquid refrigerant first accumulates at the bottom of the liquid distribution chamber 300 and then flows out of the inner pipe 200 in the shortest possible time after entering the liquid distribution chamber 300. Furthermore, because the one-way flow channel 230 is located at the bottom of the liquid distribution chamber 300, almost no refrigerant accumulates inside the liquid distribution chamber 300, minimizing the amount of refrigerant remaining in the distributor.

[0057] According to one embodiment of the present invention, the outer wall of the inner tube 200 is provided with a protrusion 240, and a one-way flow channel 230 is provided inside the protrusion 240. In this embodiment, the outer wall of the inner tube 200 is provided with a radially outward protrusion to form the protrusion 240, and the one-way flow channel 230 is provided inside the protrusion 240. The arrangement of the protrusion 240 makes the bottom space of the liquid distribution chamber 300 the outer wall of the protrusion 240 and the inner wall of the outer tube 100, thereby reducing the bottom space of the liquid distribution chamber 300 and further reducing the amount of refrigerant remaining in the distributor.

[0058] In this embodiment, the protrusion 240 is a columnar structure, and the diameter d of the protrusion 240 should be within a certain range: 1.1Din≤d≤0.9Dout. Wherein, Din is the outer diameter of the inner tube 200, and Dout is the inner diameter of the outer tube 100.

[0059] In other embodiments, the one-way flow channel 230 can also be directly formed on the inner tube 200 without the need for the protrusion 240. The protrusion 240 can be integrally formed with the inner tube 200 or separately formed from the inner tube 200. The protrusion 240 is sleeved on the inner tube 200, and the inner tube 200 is provided with corresponding holes that communicate with the one-way flow channel 230.

[0060] According to one embodiment of the present invention, the cross-sectional area of ​​the unidirectional flow channel 230 is greater than or equal to the cross-sectional area of ​​the nozzle 220. In this embodiment, by increasing the cross-sectional area of ​​the unidirectional flow channel 230, compared with the capillary tube of the prior art, the liquid refrigerant flows through a larger cross-sectional area of ​​the unidirectional flow channel 230 when flowing from the dispensing chamber 300 to the cavity of the inner tube 200, allowing it to flow in smoothly and effectively reducing the flow resistance of the refrigerant, thereby minimizing resistance during the switching between cooling and heating.

[0061] It is understood that the cross-sectional area of ​​the unidirectional flow channel 230 can be determined according to actual design needs, and the shape of the cross-section can also be set according to actual needs. In this embodiment, the opening of the unidirectional flow channel 230 on the outer wall of the protrusion 240 is a strip with a certain length.

[0062] like Figure 11 As shown, according to an embodiment of the present invention, the unidirectional flow channel 230 includes a main flow channel 231 and at least one resistance flow channel 232. Both ends of the resistance flow channel 232 are connected to the main flow channel 231. The main flow channel 231 gradually slopes upwards from the bottom towards the outer tube body 100 along the axial direction of the inner tube body 200. In this embodiment, the unidirectional flow channel 230 is composed of the main flow channel 231 and at least one resistance flow channel 232. The main flow channel 231 is a flow channel inclined at a certain angle, and the main flow channel 231 gradually moves away from the inner tube body 200 from the bottom towards the top along the axial direction of the inner tube body 200. The resistance flow channel 232 is curved, and both ends of the resistance flow channel 232 are connected to the main flow channel 231. Thus, the main flow channel 231 and the resistance flow channel 232 cooperate to form a flow channel with a Tesla valve structure, thereby achieving the effect of controlling the unidirectional flow of refrigerant at the unidirectional flow channel 230.

[0063] In this embodiment, the unidirectional flow channel 230 consists of a main flow channel 231 and a resistance flow channel 232, with the resistance flow channel 232 located above the main flow channel 231. In other embodiments, the unidirectional flow channel 230 may also consist of a main flow channel 231 and multiple resistance flow channels 232, with the multiple resistance flow channels 232 arranged sequentially on the main flow channel 231, and the multiple resistance flow channels 232 arranged alternately vertically on the main flow channel 231, forming multiple series of bends, which can also achieve the purpose of controlling the unidirectional flow of refrigerant.

[0064] In this embodiment, the lower end of the outer tube 100 is formed into a tapered slope, that is, the cross-sectional area of ​​the lower port of the outer tube 100 gradually decreases from top to bottom along the axial direction of the outer tube 100. Therefore, the cross-sectional area of ​​the bottom of the liquid distribution chamber 300 also gradually decreases. The protrusion 240 is located at this tapered position, and the shape of the protrusion 240 matches the shape of the liquid distribution chamber 300 at this location. That is, the protrusion 240 also has a tapered portion that gradually tapes from top to bottom. The extension trend of the main flow channel 231 of the unidirectional flow channel 230 and the resistance flow channel 232 matches the protruding shape.

[0065] According to one embodiment of the present invention, a plurality of unidirectional flow channels 230 are uniformly distributed axially around the inner tube 200 within the protrusion 240. In this embodiment, there are multiple unidirectional flow channels 230, which are uniformly arranged circumferentially around the inner tube 200. That is, the openings of the unidirectional flow channels 230 on the protrusion 240 face the bottom of the liquid distribution chamber 300 at various angles. On the one hand, this can further increase the inlet area of ​​the unidirectional flow channels 230 and reduce the refrigerant flow resistance; on the other hand, it can fully discharge the refrigerant at the bottom of the liquid distribution chamber 300 and reduce the accumulation of refrigerant at the bottom of the liquid distribution chamber 300.

[0066] According to one embodiment of the present invention, in addition to being configured as a Tesla valve structure, the one-way flow channel 230 can also be configured to have a one-way valve in the main flow channel 231. When the heat exchanger is an evaporator, the refrigerant cannot pass through the main flow channel 231, and when the heat exchanger is a condenser, the liquid refrigerant passes through the main flow channel 231, achieving the same effect as using a Tesla valve.

[0067] According to one embodiment of the present invention, the inner tube 200 is further provided with an exhaust port 210 communicating with the liquid distribution chamber 300, and the spray hole 220 is located between the exhaust port 210 and the one-way flow channel 230. In this embodiment, the inner tube 200 is also provided with an exhaust port 210, which can also communicate the interior of the inner tube 200 with the liquid distribution chamber 300. The inner tube 200 is provided with an exhaust port 210 and a spray hole 220 within the range of the liquid distribution chamber 300. The exhaust port 210 is located above the spray hole 220. The inner tube 200 is provided with the one-way flow channel 230, the spray hole 220 and the exhaust port 210 in sequence from bottom to top along its axial direction.

[0068] When the heat exchanger functions as an evaporator, the two-phase refrigerant enters the inner tube 200 from its lower port. The refrigerant in the inner tube 200 is then sprayed through the nozzle 220 into the distribution chamber 300 between the inner tube 200 and the outer tube 100, where it is evenly dispersed. It is then distributed to different flow paths within the heat exchanger via the branch tubes 400 for heat exchange. Due to gravity, some of the gaseous refrigerant in the inner tube 200 rises to the exhaust port 210 and can enter the distribution chamber 300 through it. As the gaseous refrigerant flows downwards after exiting the exhaust port 210, it also turbulently distributes the refrigerant within the distribution chamber 300, contributing to a more uniform refrigerant distribution.

[0069] The distributor of this invention, through the structural cooperation of the inner tube 200 and the outer tube 100, replaces the existing Venturi-type distributor, fundamentally changing the distributor structure and solving the problems caused by the existing Venturi-type distributor. It eliminates the need for capillary dispensing tubes and capillary length adjustments, offering advantages such as low cost, simple structure, small size, and easy adjustment. Furthermore, the vent 210 design of the inner tube 200 further improves the uniformity of refrigerant dispersion in the distributor.

[0070] According to one embodiment of the present invention, the vent 210 is located at the top of the liquid distribution chamber 300. In this embodiment, the upper port of the inner tube 200 is inserted into the outer tube 100 from the lower port of the outer tube 100. The upper end of the outer tube 100 is closedly connected to the upper port of the inner tube 200. The top of the liquid distribution chamber 300 is located at the upper end of the inner tube 200 and the outer tube 100. The vent 210 is provided at the upper end of the inner tube 200, corresponding to the top of the liquid distribution chamber 300.

[0071] The exhaust port 210 is located at the top of the main pipe. After the gas-liquid two-phase refrigerant enters the inner pipe 200 through the lower port of the inner pipe 200, it ensures that some of the gaseous refrigerant accumulates at the top of the liquid distribution chamber 300. At the same time, it can ensure the distribution range of the nozzle 220 on the inner pipe 200 and the spatial volume of the liquid distribution chamber 300, thereby maximizing the dispersion range of the refrigerant.

[0072] According to one embodiment of the present invention, a plurality of vent holes 210 are uniformly distributed around the axial direction of the inner tube 200. In this embodiment, there are multiple vent holes 210, which are uniformly arranged circumferentially at the upper end of the inner tube 200. That is, the vent holes 210 are arranged at various angles on the inner tube 200 facing the top of the liquid distribution chamber 300, which can further increase the coverage of the vent holes 210, reduce the exhaust resistance of some gaseous refrigerant, and fully turbulent the refrigerant within the circumferential range of the liquid distribution chamber 300, thereby improving the turbulence effect.

[0073] According to one embodiment of the present invention, the end of the branch pipe 400 is inserted into the liquid distribution chamber 300. In this embodiment, the outer pipe 100 has openings on its wall corresponding to the branch pipes 400 for inserting the branch pipes 400. Multiple branch pipes 400 are evenly distributed along the axial direction of the outer pipe 100, meaning that the branch pipes transport the refrigerant in each position of the liquid distribution chamber 300 to the heat exchanger. One end of the branch pipe 400 is inserted into the liquid distribution chamber 300 through the opening of the outer pipe 100, and there is a certain distance between it and the outer wall of the inner pipe 200. The design of the branch pipe 400 can reduce flow resistance, ensuring that the refrigerant gas-liquid two-phase flow can smoothly flow into the branch pipe 400 within the liquid distribution chamber 300.

[0074] The air conditioner provided by the present invention is described below. The air conditioner described below and the liquid separator described above can be referred to in correspondence.

[0075] This invention also provides an air conditioner, including a liquid distributor as described in the above embodiments.

[0076] In this embodiment of the air conditioner, the aforementioned distributor is provided. Within the air conditioning circulation system, the distributor distributes the gas-liquid two-phase refrigerant to various pipes of the evaporator for heat exchange. Using this distributor ensures uniform distribution, guaranteeing complete evaporation of refrigerant in high-flow-rate branches and preventing premature evaporation in low-flow-rate branches, thus avoiding wasted heat exchange area. Therefore, the uniform distribution of refrigerant in this embodiment directly affects the heat exchange capacity of the evaporator, improving air conditioning performance and preventing a decrease in heat exchanger capacity caused by uneven distribution.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid dispenser, characterized in that, It includes an outer tube (100) and an inner tube (200). The outer tube (100) is sleeved on the outside of the inner tube (200) and connected to the inner tube (200) to form a liquid distribution chamber (300). The inner wall of the inner tube (200) is provided with at least one first groove (250). The first groove (250) extends spirally along the axial direction of the inner tube (200). The first groove (250) is provided with a spray hole (220) communicating with the liquid distribution chamber (300).

2. The dispenser according to claim 1, characterized in that, The inner wall of the inner tube (200) is provided with a plurality of first grooves (250), and the plurality of first grooves (250) extend parallel to each other.

3. The dispenser according to claim 2, characterized in that, Multiple first grooves (250) are evenly distributed circumferentially on the inner wall of the inner tube (200).

4. The dispenser according to claim 1, characterized in that, The outer wall of the inner tube (200) is provided with at least two second grooves (260), the second grooves (260) are recessed into the inner wall of the inner tube (200) to form a protrusion on the inner wall of the inner tube (200), and the first groove (250) is restricted between two adjacent protrusions.

5. The dispenser according to claim 4, characterized in that, Each of the protrusions extends from the inner wall of the inner tube (200) toward the center of the inner tube (200) and is connected to each other.

6. The dispenser according to claim 1, characterized in that, The plurality of nozzles (220) are evenly distributed within the first groove (250) along the extension direction of the first groove (250).

7. The dispenser according to any one of claims 1 to 6, characterized in that, The ratio of the depth of the first groove (250) to the inner wall radius of the inner tube (200) is between 0.37 and 1; the depth of the first groove (250) is negatively correlated with the refrigerant flow rate of the inner tube (200).

8. The dispenser according to any one of claims 1 to 6, characterized in that, The refrigerant flow rate entering the inner pipe (200) is between 200 and 400 m³. 3 In the case of / h, the number of the first grooves (250) is between 6 and 10.

9. The dispenser according to any one of claims 1 to 6, characterized in that, The inner tube (200) is provided with at least one of a filter screen (500) and a guide vane (600) at the liquid inlet.

10. An air conditioner, characterized in that, Includes the dispenser as described in any one of claims 1 to 9.

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