Air conditioner

Abstract

The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a throttling assembly and a refrigerant circulation loop, and the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; a main channel is arranged at one end of the distributor, a plurality of branch channels communicated with the main channel are arranged at the other end of the distributor, the main pipeline is connected to the main channel, and the flow dividing pipelines are connected to the branch channels; the distributor comprises an inner-layer pipe and an outer-layer pipe, the outer-layer pipe is provided with a plurality of outer flow guide holes distributed at intervals in the circumferential direction, and the inner-layer pipe and the outer-layer pipe can rotate between a first relative position and a second relative position. The air conditioner has the advantages of being even in refrigerant distribution, compact in structure, capable of improving heat exchange performance and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0002] The air conditioner performs the refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The compressor compresses the refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in the heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in the cooling mode.

[0003] Among them, the indoor heat exchanger or the outdoor heat exchanger is connected to the distribution unit, and the distribution unit diverts the refrigerant through a liquid distributor, but the multiple diversion pipelines of the distributor are usually fixed. However, when the refrigerant enters the distributor, there will be a phenomenon of liquid phase separation, which will cause serious uneven distribution of the refrigerant in multiple diversion pipelines, resulting in serious impact on the performance of the heat exchanger. And as the workload of the heat exchanger changes, the fraction with the best performance will also change. At this time, the fixed distribution structure of the traditional distributor cannot match the actual working conditions well and cannot meet the best matching under different working conditions. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an air conditioner having advantages such as uniform refrigerant distribution, compact structure, and improved heat exchange performance.

[0005] To achieve the above-mentioned purpose, an air conditioner is proposed according to an embodiment of the present invention, comprising: a compressor, used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas to provide power for the refrigerant; an indoor heat exchanger and an outdoor heat exchanger, one of the indoor heat exchanger and the outdoor heat exchanger serves as an evaporator and the other serves as a condenser; a throttling component, the throttling component is used to control the refrigerant flow; a refrigerant circulation loop, the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling component and the outdoor heat exchanger; it is characterized in that the refrigerant circulation loop includes a distribution unit, the distribution unit includes: a main line, the main line is connected to the compressor; a plurality of branch pipes, the plurality of branch pipes are all connected to the indoor heat exchanger or the outdoor heat exchanger ; A distributor, one end of the distributor is provided with a main channel and the other end is provided with a plurality of branch channels connected to the main channel, the main pipeline is connected to the main channel, and the branch pipeline is connected to the branch channel; wherein the distributor comprises an inner tube and an outer tube, the inner tube is configured with a plurality of inner flow guide holes arranged at intervals along the circumferential direction, the plurality of inner flow guide holes comprise a first group of flow guide holes and a second group of flow guide holes, the outer tube is configured with a plurality of outer flow guide holes arranged at intervals along the circumferential direction, the inner tube and the outer tube are rotatable between a first relative position and a second relative position, the first group of flow guide holes are connected with a plurality of the outer flow guide holes at the first relative position to form a first flow guide channel, and the second guide holes are connected with a plurality of the outer flow guide holes at the second group of relative positions to form a second flow guide channel.

[0006] The air conditioner according to the embodiment of the present invention has the advantages of uniform refrigerant distribution, improved heat exchange performance and improved work efficiency.

[0007] According to some specific embodiments of the present invention, one end of the outer tube is constructed with a closed end face, the outer flow guide hole is formed on the outer peripheral surface adjacent to the one end of the outer tube, the one end of the inner tube is stopped at the closed end face, and the inner flow guide hole is formed on the outer peripheral surface adjacent to the one end of the inner tube.

[0008] According to some specific embodiments of the present invention, the device further comprises: a driver installed on the outer circumference of the outer tube, and the driver drives the inner tube and the outer tube to rotate relative to each other at the first relative position and the second relative position.

[0009] According to some specific embodiments of the present invention, the outer tube is configured with a liquid separation joint portion extending radially outward at a corresponding position of each of the flow guide holes, and a plurality of the flow separation pipelines are installed in the liquid separation joint portion in a one-to-one correspondence.

[0010] According to some specific embodiments of the present invention, the plurality of outer guide holes are evenly arranged along the circumference of the outer tube; the first group of guide holes among the plurality of inner guide holes are evenly arranged along the circumference of the inner tube, and the second group of guide holes among the plurality of inner guide holes are evenly arranged along the circumference of the inner tube.

[0011] According to some specific embodiments of the present invention, the plurality of outer flow guide holes and the plurality of inner flow guide holes are all circular holes with the same diameter.

[0012] According to some specific embodiments of the present invention, the number of the first group of guide holes is twice the number of the second group of guide holes, and each of the second group of guide holes is located between two adjacent first group of guide holes in the circumferential direction.

[0013] According to some specific embodiments of the present invention, the first group of guide holes adjacent to the second group of guide holes along the circumferential direction are symmetrically arranged relative to the second group of guide holes.

[0014] According to some specific embodiments of the present invention, the indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit includes: fins, which are stacked and arranged at intervals along the thickness direction; a plurality of U-shaped heat exchange tubes, which are inserted into the fins and arranged at intervals along the length direction of the fins, and one end of each of the U-shaped heat exchange tubes is connected to one of the diversion pipelines; and a flute-shaped tube, which is connected to the other ends of the plurality of U-shaped tubes.

[0015] Furthermore, the air conditioner, the indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit, also includes: a U-shaped subcooling pipe, the U-shaped subcooling pipe is inserted into the fin and is located at the lower part of the plurality of U-shaped heat exchange tubes, one end of the U-shaped subcooling pipe is connected to the flute-shaped pipe, and the other end is connected to the throttling assembly.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a structural schematic diagram of a distributor of an air conditioner according to an embodiment of the present invention;

[0019] Figure 2 is an air conditioner according to an embodiment of the present invention Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3is a schematic diagram of a distribution unit of an air conditioner connected to an outdoor heat exchanger according to an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a distribution unit of an air conditioner connected to an outdoor heat exchanger according to another embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of a distribution unit of an air conditioner connected to an outdoor heat exchanger according to another embodiment of the present invention;

[0023] Figure 6 is a schematic structural diagram of an inner tube of an air conditioner according to an embodiment of the present invention;

[0024] Figure 7 is a side view of an inner tube of an air conditioner according to an embodiment of the present invention;

[0025] Figure 8 is a cross-sectional view of an inner tube of an air conditioner according to an embodiment of the present invention;

[0026] Fig. 9 is a schematic structural diagram of an outer tube of an air conditioner according to an embodiment of the present invention;

[0027] Fig.10 is a side view of an outer tube of an air conditioner according to an embodiment of the present invention;

[0028] Fig.11 is a cross-sectional view of an outer tube of an air conditioner according to an embodiment of the present invention;

[0029] Fig.12 Schematic diagram of an indoor heat exchanger or an outdoor heat exchanger connected to a distribution unit according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] The distribution unit 100, the main pipeline 110, the branch pipeline 120, the distributor 130, the inner tube 131, the outer tube 132, the plurality of inner flow guide holes 11, the first group of flow guide holes 101, the second group of flow guide holes 102, the plurality of outer flow guide holes 12,

[0032] The closed end surface 13, the liquid separation joint 14, the indoor heat exchanger or the outdoor heat exchanger 200, the driver 300,

[0033] The signal device 400 , the fin 210 , the U-shaped heat exchange tube 220 , the flute tube 230 , and the U-shaped subcooling tube 240 . DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0036] In the description of the present invention, "plurality" means two or more.

[0037] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0038] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0039] Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0040] like Figure 1-Figure 12 As shown, the air conditioner according to the embodiment of the present invention includes a compressor, an indoor heat exchanger and an outdoor heat exchanger, a throttling component, and a refrigerant circulation loop.

[0041] The compressor is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas to provide power for the refrigerant. One of the indoor heat exchanger and the outdoor heat exchanger serves as an evaporator and the other serves as a condenser. The throttling assembly is used to control the refrigerant flow. The refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger.

[0042] The refrigerant circulation loop includes a distribution unit 100 , and the distribution unit 100 includes a main pipeline 110 , a plurality of branch pipelines 120 , and a distributor 130 .

[0043] The main pipeline 110 is connected to the compressor. The plurality of branch pipelines 120 are all connected to an indoor heat exchanger or an outdoor heat exchanger (hereinafter referred to as a heat exchanger). The distributor 130 has a main channel at one end and a plurality of branch channels connected to the main channel at the other end, the main pipeline 110 is connected to the main channel, and the branch pipeline 120 is connected to the branch channel.

[0044] Among them, the distributor 130 includes an inner tube 131 and an outer tube 132, the inner tube 131 is constructed with a plurality of inner guide holes 11 arranged at intervals along the circumferential direction, the plurality of inner guide holes 11 include a first group of guide holes 101 and a second group of guide holes 102, the outer tube 132 is constructed with a plurality of outer guide holes 12 arranged at intervals along the circumferential direction, the inner tube 131 and the outer tube 132 are rotatable between a first relative position and a second relative position, the first group of guide holes 101 is connected to a plurality of outer guide holes 12 at the first relative position to form a first guide channel, and the second group of guide holes 102 is connected to a plurality of outer guide holes 12 at the second relative position to form a second guide channel.

[0045] For example, the number of the first group of flow guide holes 101 is greater than the number of the second group of flow guide holes 102, the number of the first group of flow guide holes is the same as the number of the outer flow guide holes 12, the outer tube 132 is sleeved on the inner tube 131 and is in close contact with the inner tube 131 to maintain a seal, the multiple inner flow guide holes 11 of the inner tube 131 and the multiple outer flow guide holes 12 of the outer tube 132 correspond to each other in the distribution axial position, and the outer flow guide holes 12 are respectively connected to the first group of flow guide holes 101 and the second group of flow guide holes 102 during the rotation of the inner tube 131 and the outer tube 132 at the first relative position and the second relative position.

[0046] Among them, the number of the first group of guide holes 101 and the number of the second group of guide holes 102 are different, and thus the flow cross-sectional areas of the refrigerant are different, and the first group of guide holes 101 and the second group of guide holes 102 are respectively connected to different numbers of diversion pipes 120. When the refrigerant flows through one of the first group of guide holes 101 and the second group of guide holes 102, the other group is blocked and cannot pass the refrigerant.

[0047] According to the air conditioner of the embodiment of the present invention, by constructing the inner tube 131 and the outer tube 132, the refrigerant flows from the inner tube 131 to the outer tube 132 in sequence to the radial outer side of the distributor 130. In addition, the inner tube 131 and the outer tube 132 are relatively rotatable, so that the inner guide hole 11 and the outer guide hole 12 form different refrigerant flow rates. Specifically, the flow cross-sectional areas of the first group of guide holes 101 and the outer guide holes 12, and the flow cross-sectional areas of the second group of guide holes 102 and the outer guide holes 12 are different, thereby forming a first guide channel and a second guide channel with different flow rates.

[0048] By adjusting the rotation position of the inner tube 131 to the first relative position and the second relative position, different flow areas are formed, and the refrigerant flow rate is controlled. When the air conditioner is in cooling and heating conditions, the heat exchanger 200 can achieve the optimal number of shunts. When the plurality of first group flow guide holes 101 and the plurality of outer flow guide holes 12 are connected, the refrigerant can flow to a plurality of shunt pipes 120 through the inner tube 131 and the outer tube 132 in sequence, wherein the number of shunt pipes 120 flowing through is the same as the number of connected inner flow guide holes 11 and the outer flow guide holes 12. When the inner flow guide holes 11 and the outer flow guide holes 12 are not connected, the refrigerant will not flow through the shunt pipes 120 at that location.

[0049] Therefore, for different working conditions of the heat exchanger 200, the rotation angles of the inner tube 131 and the outer tube 132 can be flexibly adjusted, and the number of refrigerant branches can be changed without setting one-way valves with different directions and flow areas. The structure of the distributor 130 is more compact and the refrigerant flow is more accurately distributed to the heat exchanger 200, thereby improving the heat exchange performance.

[0050] In some embodiments, when the heat exchanger 200 is used as a condenser and is fully loaded, in order to reduce the pressure drop of the refrigerant and thus improve the performance of the heat exchanger 200, the inner tube 131 and the outer tube 132 are controlled to rotate to a first relative position so that the first group of flow guide holes 101 and a plurality of outer flow guide holes 12 completely overlap to form a first flow guide channel with a larger flow area. At this time, the number of effective branches of the heat exchanger 200 is increased, thereby increasing the number of branches and reducing the pressure drop.

[0051] In some embodiments, when the heat exchanger 200 is used as a condenser and operates at an intermediate load or a small load, by controlling the rotation of the inner tube 131, the second group of guide holes 102 and the plurality of outer guide holes 12 are completely overlapped to form a second guide channel with a smaller flow area. At this time, the number of effective branches of the heat exchanger 200 is reduced.

[0052] In some embodiments, when the heat exchanger 200 is used as an evaporator, the distributor 130 is located at the outlet of the heat exchanger 200. The dryness of the refrigerant gradually increases during the evaporation process. By controlling the rotation of the inner tube 131, the first group of guide holes 101 and the multiple outer guide holes 12 are completely overlapped to form a first guide channel with a larger flow area. By increasing the number of branches, the pressure drop is reduced to prevent the pressure drop on the refrigerant side from affecting the performance of the heat exchanger 200.

[0053] In addition, the inner guide hole 11 and the outer guide hole 12 are located on the outer peripheral side of the distributor 130, and the refrigerant flows from the inside to the outside along the radial direction of the distributor 130. The refrigerant constructs an annular flow in the distributor 130 and enters the liquid separation pipeline 120 to achieve uniform distribution of the annular flow, thereby effectively improving the problem of uneven liquid separation.

[0054] Therefore, the air conditioner according to the embodiment of the present invention has the advantages of uniform refrigerant distribution, compact structure, and improved heat exchange performance.

[0055] In some specific embodiments of the present invention, Figure 6-Figure 11 As shown, one end of the outer tube 132 is constructed with a closed end surface 13, the outer guide hole 12 is formed on the outer peripheral surface adjacent to one end of the outer tube 132, one end of the inner tube 131 is stopped at the closed end surface 13, and the inner guide hole 11 is formed on the outer peripheral surface adjacent to one end of the inner tube 131.

[0056] For example, the inner flow guide holes 11 are spaced apart on the outer peripheral side adjacent to the closed end surface 13, and the outer flow guide holes 12 correspond to the axial position of the inner flow guide holes 11. Through the inner flow guide holes 11 and the outer flow guide holes 12 adjacent to the closed end surface 13, the refrigerant is stopped by the closed end surface 13 when flowing in the inner layer tube 131, forming a closed loop, so that the refrigerant can more easily enter the inner flow guide holes 11 and the outer flow guide holes 12, making it easier for the refrigerant to flow along a predetermined path.

[0057] It can be understood that the refrigerant enters the inner tube 131 through the main line 110 through the power provided by the compressor. Since the inner tube 131 is stopped at the closed end surface 13, the refrigerant flows in along the axial direction of the distributor 130 and flows out along the radial direction of the distributor 130, forming a relatively uniform refrigerant flow path, ensuring the uniformity of liquid separation, helping to achieve the best cooling effect, and thus improving the performance of the air conditioner.

[0058] In some specific embodiments of the present invention, Figure 1-Figure 5 As shown, the air conditioner further includes a driver 300 , which is installed on the outer circumference of the outer tube 132 , and drives the inner tube 131 and the outer tube 132 to rotate relative to each other at a first relative position and a second relative position.

[0059] Specifically, the outer peripheral side of the distributor 200 is connected with a signal device 400, which is composed of a signal acquisition device and a signal generation device. The signal device 400 can judge the actual working condition according to parameters such as the external air state and the exhaust state of the compressor, and transmit its signal to the driver 300. The driver 300 is annularly surrounded by the outer tube 132 and fits tightly with the outer tube 132. The electromagnetic action of the driver 300 drives the inner tube 131 to rotate to a certain angle, so that the first group of guide holes 101 and the second group of guide holes 102 respectively overlap with multiple outer guide holes 12, respectively forming a first guide channel and a second guide channel with different flow rates, thereby realizing a change in the number of branches.

[0060] The driver 300 is specifically an electromagnetic driver, which adjusts the first relative position and the second relative position of the inner tube 131 and the outer tube 132 by electromagnetic force, and the inner tube 131 and the outer tube can rotate clockwise and counterclockwise. The switching of the first guide channel and the second guide channel is faster, and the number of branches of the heat exchanger 200 is changed.

[0061] In some specific embodiments of the present invention, Figure 1-Figure 5 As shown, the outer tube 132 is configured with a liquid separation joint portion 14 extending radially outward at a corresponding position of each flow guide hole 12 , and a plurality of flow separation pipelines 120 are installed in the liquid separation joint portion 14 in a one-to-one correspondence.

[0062] The liquid separation joint part 14 is configured to be a hollow cylinder, and the refrigerant flows between a plurality of shunt pipes 120 and the distributor 200 through the liquid separation joint part 14. The liquid separation joint part 14 extends radially outward, which can facilitate connection with the shunt pipe 120 and can guide the refrigerant more evenly to the radial outer side of the distributor 200. The flow direction of the refrigerant does not need to be significantly changed, and the flow resistance is small, thereby ensuring the flow rate of the refrigerant.

[0063] In addition, one end of the liquid separation joint part 14 is tightly connected to the multiple external guide holes 13, and one end of the liquid separation joint part 14 is plug-connected to the 120 of the multiple diversion pipelines. This connection method ensures the reliability of the connection, effectively avoids problems such as looseness, ensures the normal operation of the system, and the structure is relatively simple and reliable, and can be flexibly adjusted and replaced.

[0064] By connecting multiple liquid separation joints 14 with multiple diversion pipelines 120, the refrigerant can be uniformly guided into each diversion pipeline 120, and the liquid separation joint 14 extends outward so that the refrigerant flows radially outward for a distance and then is distributed to each diversion pipeline 120, thereby preventing the refrigerant from being directly sprayed out from the outer guide hole 12, thereby ensuring the stability of the refrigerant flow.

[0065] In some specific embodiments of the present invention, Figure 6-Figure 11 As shown, the plurality of outer guide holes 12 are evenly arranged along the circumference of the outer tube 132. The first group of guide holes 11 among the plurality of inner guide holes 11 are evenly arranged along the circumference of the inner tube 131, and the second group of guide holes 11 among the plurality of inner guide holes 11 are evenly arranged along the circumference of the inner tube 131.

[0066] The refrigerant ensures uniform flow to different branch pipes 120 through multiple inner guide holes 11 of the inner tube 131 and multiple outer guide holes 12 of the outer tube 132, while balancing the pressure distribution in the system and avoiding excessive flow or excessive flow rate in certain areas, thereby improving the stability and reliability of the air conditioner.

[0067] In some specific embodiments of the present invention, Figure 6 As shown in 11 , the multiple outer flow guide holes 12 and the multiple inner flow guide holes 11 are all circular holes with the same diameter.

[0068] like Figure 6 and Fig. 9 As shown, the multiple outer guide holes 12 and the multiple inner guide holes 11 are all circular holes and are evenly spaced. At the same time, the diameters of the circular holes are all equal. When the refrigerant enters the interior of the air conditioner through the multiple outer guide holes 12, the circular holes of the same diameter ensure that the flow velocity and flow rate of the refrigerant in the circular holes at different positions are basically the same, avoiding uneven refrigerant flow, thereby achieving uniform distribution of the refrigerant, and helping to improve the working stability and cooling effect of the air conditioner.

[0069] In addition, the shape of the circular hole is adapted to the shape of the cross-section of the liquid separation joint 14 and the diversion pipeline 120, so that the condensed water can be transferred from the distributor 200 to the diversion pipeline 120 more smoothly, reducing the loss of system pressure, and the circular holes of the same diameter are connected with good sealing, reducing the risk of refrigerant leakage and improving the reliability of the air conditioner.

[0070] In some specific embodiments of the present invention, Figure 6 As shown in FIG11 , the number of the first group of guide holes 101 is twice the number of the second group of guide holes 102 , and each of the second group of guide holes 102 is located between two adjacent first group of guide holes 101 in the circumferential direction.

[0071] For example, the first group of guide holes 101 are evenly distributed at intervals of 180 / n° along the circumferential direction, and the number is 2n (a multiple of 2). The second group of guide holes 102 are evenly distributed at intervals of 360 / n° along the circumferential direction, and the number is n (a multiple of 1). The positions of the multiple outer guide holes 12 are fixed, evenly distributed at intervals of 180 / n°, and there is only one group, and the number is 2n.

[0072] The number of the first group of flow guide holes 101 is greater than the number of the second group of flow guide holes 102 and is twice the number of the second group of flow guide holes 102. In the circumferential direction of the distributor 300, the second group of flow guide holes 102 is axially located between two first group of flow guide holes 101. For example, six first group of flow guide holes 101 and three second group of flow guide holes 102 are provided. This ensures that the number of refrigerant branches is different under different working conditions in actual situations, thereby improving the performance and working efficiency of the heat exchanger 200.

[0073] When the heat exchanger 200 works as a condenser and an evaporator respectively, taking the outdoor heat exchanger as an example:

[0074] When the outdoor heat exchanger 200 is used as a condenser and operates at an intermediate load or a small load, such as Figure 4As shown, the refrigerant is in a high-pressure area, the main line 110 is connected to the compressor exhaust pipe, and the pressure drop has little effect on the performance of the heat exchanger 200. A smaller number of second group flow guide holes 102 with a smaller number of branch lines can be used to circulate the refrigerant, thereby increasing the flow rate of the refrigerant in each second group of flow guide holes 102 and thereby increasing the heat transfer coefficient of the heat exchanger 200.

[0075] When the outdoor heat exchanger 200 is used as a condenser and is fully loaded or an evaporator, as Figure 3 and Figure 5 As shown, the refrigerant is in a low-pressure area, and the main line 110 is connected to the compressor return pipe. The pressure drop has a greater impact on the performance of the heat exchanger 200. Therefore, it is necessary to use a first group of flow guide holes 101 with a larger number of branches to circulate the refrigerant to reduce the pressure drop on the refrigerant side, thereby avoiding the evaporation temperature slip caused by excessive pressure drop and deteriorating the heat exchange performance.

[0076] In some specific embodiments of the present invention, Figure 7 As shown, the first group of guide holes 101 adjacent to the second group of guide holes 102 along the circumferential direction are symmetrically arranged relative to the second group of guide holes 102 .

[0077] Specifically, the number of the first group of guide holes 101 is twice that of the second group of guide holes 102, so each of the second group of guide holes 102 is located at the midpoint of two adjacent first group of guide holes 102, and the first group of guide holes 101 and the second group of guide holes 102 are evenly spaced, ensuring that the refrigerant is evenly distributed along the distributor to the multiple branch pipes 120, and an annular flow is constructed in the distributor and evenly distributed annular flow is achieved through the multiple branch pipes 120, thereby improving the uniformity of refrigerant circulation.

[0078] The first group of flow guide holes 101 and the second group of flow guide holes 102 select the number of branches of the plurality of flow diversion pipelines 120 according to actual load conditions.

[0079] For example, when the heat exchanger 200 is used as a condenser and is fully loaded, the number of effective branch pipes at the inlet of the heat exchanger 200 needs to reach the maximum, and the inner tube 131 rotates until the first group of flow guide holes 101 completely overlaps with the multiple outer flow guide holes 12. When the heat exchanger 200 is used as a condenser and works at an intermediate load or a small load, the amount of refrigerant required to flow inside the heat exchanger 200 is small. At this time, the number of refrigerant flow paths needs to be reduced to increase the heat exchange capacity on the refrigerant side. Therefore, the number of effective branch pipes at the inlet of the heat exchanger 200 can be reduced by about half, and the inner tube 131 rotates until the second group of flow guide holes 102 completely overlaps with the multiple outer flow guide holes 12.

[0080] When the heat exchanger 200 is used as an evaporator, the pressure drop on the refrigerant side has a greater impact on the performance of the heat exchanger 200. The number of branches should be appropriately increased to reduce the pressure drop. At this time, the number of effective branch pipes at the outlet of the heat exchanger 200 should reach a maximum. At this time, the inner tube 131 rotates until the first group of guide holes 101 completely overlaps with the multiple outer guide holes 12.

[0081] By adjusting the number of branches of the heat exchanger 200 according to the actual load, it is ensured that the heat exchanger 200 can work with the optimal number of branches under various working conditions, thereby improving the performance of the heat exchanger 200.

[0082] In some specific embodiments of the present invention, Fig.12 As shown, the indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit 100 includes fins 210 , a plurality of U-shaped heat exchange tubes 220 and a flute tube 230 .

[0083] The fins 210 are stacked and arranged at intervals in the thickness direction. A plurality of U-shaped heat exchange tubes 220 are inserted through the fins 210 and arranged at intervals in the length direction of the fins 210. One end of each U-shaped heat exchange tube 220 is connected to a flow dividing pipeline 120. The flute tube 230 is connected to the other end of the plurality of U-shaped tubes.

[0084] For example, the heat exchanger 200 is constructed as a single-row structure, that is, a row of U-shaped heat exchange tubes 220 are arranged along the thickness direction of the fin 210 , and a plurality of U-shaped heat exchange tubes 220 are connected to the diversion pipeline 120 on the same side of the fin 210 .

[0085] like Figure 3 As shown, when the heat exchanger 200 is used as a condenser and operates under full load conditions, the flow directions of the multiple U-shaped heat exchange tubes 220 connected to the first group of guide holes 101 are the same, and the other ends of the multiple U-shaped tubes are connected to the flute-shaped tubes 230 to collect the refrigerant in one place and then distribute it to the multiple U-shaped heat exchange tubes 220, so that the refrigerant can flow fully in the U-shaped heat exchange tubes 220, thereby improving the comprehensive performance of the heat exchanger 200.

[0086] like Figure 4 As shown, when the heat exchanger 200 is used as a condenser and operates under intermediate load or light load conditions, the flow directions of the multiple U-shaped heat exchange tubes 220 connected to the second group of flow guide holes 102 are the same, and the remaining working process is the same as when the heat exchanger 200 is used as a condenser and operates under full load conditions.

[0087] like Figure 5 As shown, when the heat exchanger 200 is used as an evaporator, the multiple U-shaped heat exchange tubes 220 connected to the first group of flow guide holes 101 have the same flow direction, and the other ends of the multiple U-shaped heat exchange tubes 220 are connected to the flute-shaped tubes 230 to collect the refrigerant at one place and then collect it to the distributor 130, so that the refrigerant can flow fully in the U-shaped heat exchange tubes 220, thereby improving the comprehensive performance of the heat exchanger 200.

[0088] Furthermore, if Fig.12 As shown, the indoor heat exchanger or the outdoor heat exchanger 200 connected to the distribution unit 100 further includes a U-shaped subcooling pipe 240 .

[0089] The U-shaped subcooling tube 240 is inserted through the fin 210 and is located at the lower part of the U-shaped heat exchange tube 220. One end of the U-shaped subcooling tube 240 is connected to the flute tube 230, and the other end is connected to the throttling assembly. The structure of the U-shaped subcooling tube 240 is the same as that of the U-shaped heat exchange tube 220. The U-shaped subcooling tube 240 can increase the volume of the refrigerant circulating in the heat exchanger 200, thereby accommodating more liquid refrigerant, thereby enhancing heat exchange.

[0090] Other structures and operations according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0092] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner, comprising: A compressor is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas to provide power for the refrigerant; an indoor heat exchanger and an outdoor heat exchanger, one of the indoor heat exchanger and the outdoor heat exchanger serving as an evaporator and the other serving as a condenser; A throttling component, wherein the throttling component is used to control the flow rate of the refrigerant; A refrigerant circulation loop, wherein the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; It is characterized in that the refrigerant circulation loop includes a distribution unit, and the distribution unit includes: a main pipe connected to the compressor; A plurality of flow-dividing pipelines, wherein the plurality of flow-dividing pipelines are all connected to the indoor heat exchanger or the outdoor heat exchanger; A distributor, wherein one end of the distributor is provided with a main channel and the other end is provided with a plurality of branch channels connected to the main channel, the main pipeline is connected to the main channel, and the branch pipeline is connected to the branch channels; Wherein, the distributor includes an inner tube and an outer tube, the inner tube is configured with a plurality of inner flow guide holes arranged at intervals along the circumferential direction, the plurality of inner flow guide holes include a first group of flow guide holes and a second group of flow guide holes, the outer tube is configured with a plurality of outer flow guide holes arranged at intervals along the circumferential direction, the inner tube and the outer tube are rotatable between a first relative position and a second relative position, the first group of flow guide holes are connected with a plurality of the outer flow guide holes at the first relative position to form a first flow guide channel, and the second group of flow guide holes are connected with a plurality of the outer flow guide holes at the second relative position to form a second flow guide channel.

2. The air conditioner according to claim 1, characterized in that: One end of the outer tube is configured with a closed end surface, the outer guide hole is formed on the outer peripheral surface adjacent to the one end of the outer tube, the one end of the inner tube is stopped at the closed end surface, and the inner guide hole is formed on the outer peripheral surface adjacent to the one end of the inner tube.

3. The air conditioner according to claim 1, characterized in that: Also includes: A driver is installed on the outer peripheral side of the outer tube, and the driver drives the inner tube and the outer tube to rotate relative to each other at the first relative position and the second relative position.

4. The air conditioner according to claim 1, characterized in that: The outer tube is configured with a liquid separation joint portion extending radially outward at a corresponding position of each of the flow guide holes, and a plurality of the flow separation pipelines are installed on the liquid separation joint portion in a one-to-one correspondence.

5. The air conditioner according to claim 1, characterized in that: The plurality of outer guide holes are evenly arranged along the circumference of the outer tube; the first group of guide holes among the plurality of inner guide holes are evenly arranged along the circumference of the inner tube, and the second group of guide holes among the plurality of inner guide holes are evenly arranged along the circumference of the inner tube.

6. The air conditioner according to claim 1, characterized in that: The plurality of outer flow guide holes and the plurality of inner flow guide holes are all circular holes with the same diameter.

7. The air conditioner according to claim 1, characterized in that: The number of the first group of guide holes is twice the number of the second group of guide holes, and each of the second group of guide holes is located between two adjacent first group of guide holes in the circumferential direction.

8. The air conditioner according to claim 7, characterized in that: The first group of guide holes adjacent to the second group of guide holes along the circumferential direction are symmetrically arranged relative to the second group of guide holes.

9. The air conditioner according to claim 1, characterized in that: The indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit comprises: Fins, the fins are stacked and arranged at intervals in a thickness direction; A plurality of U-shaped heat exchange tubes, the plurality of U-shaped heat exchange tubes are inserted through the fins and arranged at intervals along the length direction of the fins, and one end of each of the U-shaped heat exchange tubes is connected to one of the diversion pipelines; A flute-shaped tube is connected to the other ends of the plurality of U-shaped tubes.

10. The air conditioner according to claim 9, characterized in that: The indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit further includes: A U-shaped subcooling tube is inserted through the fins and is located at the bottom of the plurality of U-shaped heat exchange tubes. One end of the U-shaped subcooling tube is connected to the flute tube, and the other end is connected to the throttling assembly.

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