Air conditioner

Abstract

The application discloses an air conditioner, which comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a throttling component and a refrigerant circulation loop connected to the compressor, the indoor heat exchanger, the throttling component and the outdoor heat exchanger; the refrigerant circulation loop is connected to the compressor, the indoor heat exchanger, the throttling component and the outdoor heat exchanger; a distributor is provided with a main channel at one end and a plurality of branch channels communicated with the main channel at the other end, a main pipeline is connected to the main channel, and a shunt pipeline is connected to the branch channels; the distributor comprises an inner layer pipe and an outer layer pipe, the outer layer pipe is configured with a plurality of outer flow guide holes arranged 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 provided by the embodiment of the application has the advantages of uniform refrigerant distribution, compact structure, improved heat exchange performance and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to an air conditioner. BACKGROUND

[0002] An air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The compressor compresses 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. An indoor heat exchanger and an outdoor heat exchanger are used as the condenser or the evaporator. When the indoor heat exchanger is used as the condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as the evaporator, the air conditioner is used as a cooler in a cooling mode.

[0003] Among them, the indoor heat exchanger or the outdoor heat exchanger is connected with a distribution unit, the distribution unit distributes the refrigerant through a distributor, but the multiple distribution pipelines of the distributor are usually fixed. However, the refrigerant entering the distributor will have a liquid phase separation phenomenon, which causes the refrigerant in the multiple distribution pipelines to be seriously unevenly distributed, resulting in a serious impact on the performance of the heat exchanger. And with the change of the working load of the heat exchanger, the fraction of the performance best will also change, at this time the fixed distribution structure of the traditional distributor cannot be well matched with the actual working condition, and cannot meet the best matching under different working conditions. SUMMARY

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

[0005] To achieve the above object, the air conditioner according to an embodiment of the present application comprises: a compressor for compressing 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 which is an evaporator and the other is a condenser; a throttling assembly for controlling the refrigerant flow; a refrigerant circulation loop connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger; characterized in that the refrigerant circulation loop comprises a distribution unit, which comprises: a main pipeline connected to the compressor; a plurality of branch pipelines, each connected to the indoor heat exchanger or outdoor heat exchanger; a distributor, one end of which 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 layer pipe and an outer layer pipe, the inner layer pipe is configured with a plurality of inner guide holes arranged in a circumferential direction, the plurality of inner guide holes comprises a first group of guide holes and a second group of guide holes, the outer layer pipe is configured with a plurality of outer guide holes arranged in a circumferential direction, the inner layer pipe and the outer layer pipe are rotatable between a first relative position and a second relative position, the first group of guide holes is in communication with a plurality of outer guide holes to form a first guide channel at the first relative position, and the second guide hole is in communication with a plurality of outer guide holes to form a second guide channel at the second relative position.

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

[0007] According to some specific embodiments of the present application, one end of the outer layer pipe is configured with a closed end face, the outer guide holes are formed on the outer circumferential surface adjacent to the one end of the outer layer pipe, the one end of the inner layer pipe is stopped at the closed end face, and the inner guide holes are formed on the outer circumferential surface adjacent to the one end of the inner layer pipe.

[0008] According to some specific embodiments of the present application, further comprising: a driver installed on the outer circumferential side of the outer layer pipe, the driver driving the inner layer pipe and the outer layer pipe to rotate relatively at the first relative position and the second relative position.

[0009] According to some specific embodiments of the present application, the outer layer pipe is configured with a liquid distribution joint extending to the radial outer side at the corresponding position of each guide hole, and a plurality of branch pipelines are installed one by one on the liquid distribution joint.

[0010] According to some embodiments of the present application, the plurality of outer flow guide holes are uniformly arranged along the circumference of the outer layer pipe; the first group of flow guide holes in the plurality of inner flow guide holes are uniformly arranged along the circumference of the inner layer pipe, and the second group of flow guide holes in the plurality of inner flow guide holes are uniformly arranged along the circumference of the inner layer pipe.

[0011] According to some embodiments of the present application, the plurality of outer flow guide holes and the plurality of inner flow guide holes are circular holes with equal diameters.

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

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

[0014] According to some embodiments of the present application, the indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit comprises: fins stacked and arranged at intervals in the thickness direction; a plurality of U-shaped heat exchange pipes inserted into the fins and arranged at intervals along the length direction of the fins, one end of each of the U-shaped heat exchange pipes being connected to one of the distribution pipelines; and a flute-shaped pipe connected to the other end of the plurality of U-shaped heat exchange pipes.

[0015] Further, the air conditioner, the indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit further comprises: a U-shaped supercooling pipe inserted into the fins and located at the lower part of the plurality of U-shaped heat exchange pipes, one end of the U-shaped supercooling pipe being connected to the flute-shaped pipe, and the other end being connected to the throttling assembly.

[0016] Additional aspects and advantages of the present application will be made apparent from the following description of embodiments of the present application, which is given for purposes of illustration and not limitation. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments, given for purposes of illustration and not limitation, in conjunction with the accompanying drawings:

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

[0019] Figure 2 is a structural schematic diagram of a distributor of an air conditioner according to an embodiment of the present application; Figure 1 is a partial enlarged view of A in FIG. 4;

[0020] Figure 3Fig. 2 is a schematic view of a distribution unit connecting an outdoor heat exchanger according to an embodiment of the present application;

[0021] Figure 4 Fig. 3 is a schematic view of a distribution unit connecting an outdoor heat exchanger according to another embodiment of the present application;

[0022] Figure 5 Fig. 4 is a schematic view of a distribution unit connecting an outdoor heat exchanger according to another embodiment of the present application;

[0023] Figure 6 Fig. 5 is a structural schematic view of an inner layer tube of an air conditioner according to an embodiment of the present application;

[0024] Figure 7 Fig. 6 is a side view of an inner layer tube of an air conditioner according to an embodiment of the present application;

[0025] Figure 8 Fig. 7 is a sectional view of an inner layer tube of an air conditioner according to an embodiment of the present application;

[0026] Figure 9 Fig. 8 is a structural schematic view of an outer layer tube of an air conditioner according to an embodiment of the present application;

[0027] Figure 10 Fig. 9 is a side view of an outer layer tube of an air conditioner according to an embodiment of the present application;

[0028] Figure 11 Fig. 10 is a sectional view of an outer layer tube of an air conditioner according to an embodiment of the present application;

[0029] Figure 12 Fig. 11 is a schematic view of an indoor heat exchanger or an outdoor heat exchanger connected by a distribution unit according to an embodiment of the present application.

[0030] Reference Signs:

[0031] Distribution unit 100, main pipe 110, branch pipe 120, distributor 130, inner layer tube 131, outer layer tube 132,

[0032] Multiple inner flow guide holes 11, first group of flow guide holes 101, second group of flow guide holes 102, multiple outer flow guide holes 12,

[0033] Closed end face 13, distribution joint part 14, indoor heat exchanger or outdoor heat exchanger 200, driver 300,

[0034] Signaller 400, fin 210, U-shaped heat exchange tube 220, flute-shaped tube 230, U-shaped supercooling tube 240. DETAILED DESCRIPTION

[0035] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0036] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0037] In the description of the present application, "a plurality of" means two or more.

[0038] In the description of the present application, "above" or "below" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0039] In the description of the present application, "above", "over" and "on" the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.

[0040] An air conditioner according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0041] As Figures 1-12 shown, the air conditioner according to an embodiment of the present application includes a compressor, an indoor heat exchanger and an outdoor heat exchanger, a throttling assembly, a refrigerant circulation circuit.

[0042] The compressor is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas to provide power to the refrigerant. One of the indoor heat exchanger and the outdoor heat exchanger acts as an evaporator and the other acts as a condenser. The throttling assembly is used to control the refrigerant flow. The refrigerant circulation circuit is connected to the compressor, the indoor heat exchanger, the throttling assembly and the outdoor heat exchanger.

[0043] The refrigerant circulation circuit includes a distribution unit 100, and the distribution unit 100 includes a main pipe 110 and a plurality of branch pipes 120 and a distributor 130.

[0044] The main pipe 110 is connected to the compressor. The multiple branch pipes 120 are connected to the indoor heat exchanger or the outdoor heat exchanger (hereinafter referred to as the heat exchanger). The distributor 130 has a main passage at one end and multiple branch passages connected to the main passage at the other end, the main pipe 110 is connected to the main passage, and the branch pipes 120 are connected to the branch passages.

[0045] The distributor 130 includes an inner layer pipe 131 and an outer layer pipe 132. The inner layer pipe 131 is configured with multiple inner flow holes 11 arranged in a circumferential direction. The multiple inner flow holes 11 include a first group of flow holes 101 and a second group of flow holes 102. The outer layer pipe 132 is configured with multiple outer flow holes 12 arranged in a circumferential direction. The inner layer pipe 131 and the outer layer pipe 132 are rotatable between a first relative position and a second relative position. The first group of flow holes 101 and the multiple outer flow holes 12 are connected to form a first flow passage at the first relative position. The second group of flow holes 102 and the multiple outer flow holes 12 are connected to form a second flow passage at the second relative position.

[0046] For example, the number of the first group of flow holes 101 is greater than the number of the second group of flow holes 102. The number of the first group of flow holes is the same as the number of the outer flow holes 12. The outer layer pipe 132 is sleeved on the inner layer pipe 131 and is in close contact with the inner layer pipe 131 to maintain sealing. The multiple inner flow holes 11 of the inner layer pipe 131 and the multiple outer flow holes 12 of the outer layer pipe 132 correspond in position in the distribution axial direction. The outer flow holes 12 are respectively connected to the first group of flow holes 101 and the second group of flow holes 102 during rotation of the inner layer pipe 131 and the outer layer pipe 132 between the first relative position and the second relative position.

[0047] The number of the first group of flow holes 101 and the second group of flow holes 102 is different, and the flow cross-sectional area of the refrigerant is different. The first group of flow holes 101 and the second group of flow holes 102 are respectively connected to different numbers of branch pipes 120. When one of the first group of flow holes 101 and the second group of flow holes 102 flows the refrigerant, the other group is blocked and cannot pass the refrigerant.

[0048] According to the air conditioner of the embodiment of the present application, the inner layer pipe 131 and the outer layer pipe 132 are configured. The refrigerant flows from the inner layer pipe 131 to the outer layer pipe 132 to the radial outside of the distributor 130 in sequence. The inner layer pipe 131 and the outer layer pipe 132 are relatively rotatable, so that the inner flow holes 11 and the outer flow holes 12 form different refrigerant flow rates. Specifically, the flow cross-sectional areas of the first group of flow holes 101 and the outer flow holes 12, and the flow cross-sectional areas of the second group of flow holes 102 and the outer flow holes 12 are different, thereby forming the first flow passage and the second flow passage with different flow rates.

[0049] By adjusting the rotating position of the inner layer pipe 131 to the first relative position and the second relative position, different flow areas are formed, and the refrigerant flow is controlled. In the refrigeration and heating operating conditions of the air conditioner, the heat exchanger 200 can reach the optimal number of branches. When the plurality of first guide holes 101 and the plurality of outer guide holes 12 are communicated, the refrigerant can flow to the plurality of branch pipes 120 through the inner layer pipe 131 and the outer layer pipe 132 in sequence, wherein the number of the branch pipes 120 through which the refrigerant flows is the same as the number of the inner guide holes 11 and the outer guide holes 12 that are communicated, and the branch pipes 120 through which the refrigerant does not flow when the inner guide holes 11 and the outer guide holes 12 are not communicated.

[0050] Thus, for different operating conditions of the heat exchanger 200, the rotating angles of the inner layer pipe 131 and the outer layer pipe 132 can be flexibly adjusted, the change in the number of refrigerant branches can be realized without setting one-way valves with different directions and flow areas, the structure of the distributor 130 is more compact, and the refrigerant flow can be more accurately distributed to the heat exchanger 200, thereby improving the heat exchange performance.

[0051] In some embodiments, when the heat exchanger 200 is used as a condenser and is in full load, in order to reduce the pressure drop of the refrigerant and improve the performance of the heat exchanger 200, the inner layer pipe 131 and the outer layer pipe 132 are controlled to rotate to the first relative position, the first group of guide holes 101 and the plurality of outer guide holes 12 are completely overlapped to form a first guide passage with a large flow area, and the effective number of branches of the heat exchanger 200 reaches more, thereby increasing the number of branches and reducing the pressure drop.

[0052] In some embodiments, when the heat exchanger 200 is used as a condenser and is in intermediate load or small load, the rotation of the inner layer pipe 131 is controlled, the second group of guide holes 102 and the plurality of outer guide holes 12 are completely overlapped to form a second guide passage with a small flow area, and the effective number of branches of the heat exchanger 200 is reduced.

[0053] 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, the rotation of the inner layer pipe 131 is controlled, the first group of guide holes 101 and the plurality of outer guide holes 12 are completely overlapped to form a first guide passage with a large flow area, the number of branches is increased to reduce the pressure drop, and the influence of the refrigerant side pressure drop on the performance of the heat exchanger 200 is prevented.

[0054] In addition, the inner guide holes 11 and the outer guide holes 12 are located on the outer circumferential side of the distributor 130, the refrigerant flows from the inside to the outside along the radial direction of the distributor 130, the refrigerant forms a ring flow in the distributor 130 and enters the branch pipe 120, the uniform distribution of the ring flow is realized, and the problem of uneven distribution is effectively improved.

[0055] Therefore, the air conditioner according to the embodiment of the present application has the advantages of uniform refrigerant distribution, compact structure, improved heat exchange performance, etc.

[0056] In some embodiments of the present application, as shown in Figures 6-11 One end of the outer tube 132 is configured with a closed end face 13, and the outer flow guide hole 12 is formed on the outer peripheral surface adjacent to the one end of the outer tube 132. The one end of the inner tube 131 is stopped at the closed end face 13, and the inner flow guide hole 11 is formed on the outer peripheral surface adjacent to the one end of the inner tube 131.

[0057] For example, the inner flow guide hole 11 is spaced apart on the outer peripheral side adjacent to the closed end face 13, and the outer flow guide hole 12 corresponds to the axial position of the inner flow guide hole 11. The refrigerant is stopped by the closed end face 13 when flowing in the inner tube 131 adjacent to the closed end face 13, thereby forming a closed loop, so that the refrigerant can more easily enter the inner flow guide hole 11 and the outer flow guide hole 12, and the refrigerant can more easily flow along the predetermined path.

[0058] It can be understood that the refrigerant enters the inner tube 131 through the power provided by the compressor through the main pipe 110. Since the inner tube 131 is stopped at the closed end face 13, the refrigerant flows in the axial direction of the distributor 130 and flows out in the radial direction of the distributor 130, thereby forming a relatively uniform refrigerant flow path, ensuring uniform distribution, and helping to achieve the best cooling effect, thereby improving the performance of the air conditioner.

[0059] In some embodiments of the present application, as shown in Figures 1-5 The air conditioner further comprises a driver 300 mounted on the outer peripheral side of the outer tube 132. The driver 300 drives the inner tube 131 and the outer tube 132 to rotate relative to each other between the first relative position and the second relative position.

[0060] 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 generating device. The signal device 400 can determine the actual working condition according to the air state, the exhaust state of the compressor and other parameters, and transmit the signal to the driver 300. The driver 300 is in the form of a ring and closely surrounds the outer tube 132. The driver 300 drives the inner tube 131 to rotate to a certain angle through electromagnetic action, so that the first group of flow guide holes 101 and the second group of flow guide holes 102 respectively completely coincide with a plurality of outer flow guide holes 12, and respectively form first flow guide passages and second flow guide passages with different flow rates, thereby realizing the change of the number of branches.

[0061] The driver 300 is specifically an electromagnetic driver, which adjusts the first relative position and the second relative position of the inner layer pipe 131 and the outer layer pipe 132 by electromagnetic force, and the inner layer pipe 131 and the outer layer pipe can rotate clockwise and counterclockwise. The switching of the first flow guide channel and the second flow guide channel is faster, and the change of the branch number of the heat exchanger 200 is realized.

[0062] In some specific embodiments of the present application, as shown in Figures 1-5 The outer layer pipe 132 is configured with a distribution connector 14 extending to the radial outer side at the corresponding position of each flow guide hole 12, and the plurality of distribution pipelines 120 are correspondingly installed on the distribution connector 14.

[0063] The distribution connector 14 is configured as a hollow cylinder, the refrigerant flows between the plurality of distribution pipelines 120 and the distributor 200 through the distribution connector 14, the distribution connector 14 extends radially outward, which can facilitate the connection with the distribution pipeline 120 and can more uniformly guide the refrigerant to the radial outer side of the distributor 200, and the flow direction of the refrigerant does not need to be greatly changed, so the flow resistance is small, thereby ensuring the flow of the refrigerant.

[0064] In addition, one end of the distribution connector 14 is closely connected with the plurality of outer flow guide holes 13, and the other end of the distribution connector 14 is connected with the plurality of distribution pipelines 120 in a plug-in manner, which ensures the reliability of the connection, effectively avoids problems such as looseness, ensures the normal operation of the system, and has a relatively simple and reliable structure and can be flexibly adjusted and replaced.

[0065] By connecting the plurality of distribution connectors 14 with the plurality of distribution pipelines 120, the refrigerant can be uniformly guided into each distribution pipeline 120, and the distribution connector 14 extends outward, and the refrigerant flows radially outward to a certain distance and then is distributed into each distribution pipeline 120, which can avoid the refrigerant being directly sprayed out of the outer flow guide hole 12, and the stability of the refrigerant flow is ensured.

[0066] In some specific embodiments of the present application, as shown in Figures 6-11 The plurality of outer flow guide holes 12 are uniformly arranged along the circumference of the outer layer pipe 132. The first group of flow guide holes 11 in the plurality of inner flow guide holes 11 are uniformly arranged along the circumference of the inner layer pipe 131, and the second group of flow guide holes 11 in the plurality of inner flow guide holes 11 are uniformly arranged along the circumference of the inner layer pipe 131.

[0067] The refrigerant flows uniformly to different distribution pipelines 120 through the plurality of inner flow guide holes 11 of the inner layer pipe 131 and the plurality of outer flow guide holes 12 of the outer layer pipe 132, and at the same time, the pressure distribution in the system is balanced, and the flow rate in some areas is prevented from being too large or too fast, thereby improving the stability and reliability of the air conditioner.

[0068] In some embodiments of the present application, as shown in Figure 6 -As shown in 11, the plurality of outer flow guide holes 12 and the plurality of inner flow guide holes 11 are circular holes and have equal diameters.

[0069] As shown in Figure 6 and Figure 9 , the plurality of outer flow guide holes 12 and the plurality of inner flow guide holes 11 are circular holes and are uniformly spaced, and the diameters of the circular holes are equal. When the refrigerant passes through the plurality of outer flow guide holes 12 into the air conditioner, the circular holes of the same diameter ensure that the flow rate and flow of the refrigerant in different positions are basically the same, avoiding uneven refrigerant flow, thereby achieving uniform distribution of the refrigerant, which helps to improve the stability and cooling effect of the air conditioner.

[0070] In addition, the shape of the circular hole is adapted to the shape of the cross section of the distribution connector 14 and the shunt pipeline 120, making the transition of the condensed water from the distributor 200 to the shunt pipeline 120 more smooth, reducing the loss of system pressure, and the circular holes of the same diameter are connected to have good sealing, reducing the risk of refrigerant leakage and improving the reliability of the air conditioner.

[0071] In some embodiments of the present application, as shown in Figure 6 -As shown in 11, the number of the first group of flow guide holes 101 is twice the number of the second group of flow guide holes 102, and each second group of flow guide holes 102 is located between two adjacent first group of flow guide holes 101 in the circumferential direction.

[0072] For example, the first group of flow guide holes 101 are uniformly distributed at an interval of 180 / n° in the circumferential direction, and the number is 2n (a multiple of 2), and the second group of flow guide holes 102 are uniformly distributed at an interval of 360 / n° in the circumferential direction, and the number is n (a multiple of 1), the positions of the plurality of outer flow guide holes 12 are fixed, uniformly distributed at an interval of 180 / n° and only this group, and the number is 2n.

[0073] By making the number of the first group of flow guide holes 101 greater than the number of the second group of flow guide holes 102 and twice the number of the second group of flow guide holes 102, the second group of flow guide holes 102 is located between two first group of flow guide holes 101 in the axial direction in the circumferential direction of the distributor 300, for example, 6 first group of flow guide holes 101 and 3 second group of flow guide holes 102 are provided. Ensure that the number of refrigerant shunts is different under different working conditions in actual situations, thereby improving the performance and working efficiency of the heat exchanger 200.

[0074] When the heat exchanger 200 works as a condenser and an evaporator respectively, taking the outdoor heat exchanger as an example:

[0075] When the outdoor heat exchanger 200 works as a condenser and is in an intermediate load or a small load, as shown in Figure 4As shown, the refrigerant is in the high pressure zone, the main pipeline 110 is connected with the compressor exhaust pipe, the pressure drop has less influence on the performance of the heat exchanger 200, the second group of flow guide holes 102 with less number of sub-paths can be used to flow the refrigerant, so as to improve the flow rate of the refrigerant in each second group of flow guide holes 102 and increase the heat transfer coefficient of the heat exchanger 200.

[0076] As shown, the refrigerant is in the low pressure zone, the main pipeline 110 is connected with the compressor return pipe, the pressure drop has greater influence on the performance of the heat exchanger 200, and therefore it is necessary to use the first group of flow guide holes 101 with more number of sub-paths to flow the refrigerant to reduce the pressure drop on the refrigerant side, so as to avoid the evaporation temperature slip and worsen the heat exchange performance due to the too large pressure drop. Figure 3 and Figure 5 As shown, the refrigerant is in the low pressure zone, the main pipeline 110 is connected with the compressor return pipe, the pressure drop has greater influence on the performance of the heat exchanger 200, and therefore it is necessary to use the first group of flow guide holes 101 with more number of sub-paths to flow the refrigerant to reduce the pressure drop on the refrigerant side, so as to avoid the evaporation temperature slip and worsen the heat exchange performance due to the too large pressure drop.

[0077] In some embodiments of the present application, as shown in Figure 7 As shown, the first group of flow guide holes 101 adjacent to the second group of flow guide holes 102 are symmetrically arranged relative to the second group of flow guide holes 102.

[0078] Specifically, the number of the first group of flow guide holes 101 is twice the number of the second group of flow guide holes 102, so that each of the second group of flow guide holes 102 is located at the midpoint position of the adjacent two first group of flow guide holes 102, and the first group of flow guide holes 101 and the second group of flow guide holes 102 are uniformly spaced, which ensures that the refrigerant is uniformly distributed along the distributor to the multiple sub-pipeline 120, and an annular flow is constructed in the distributor and uniformly distributed through the multiple sub-pipeline 120, thereby improving the uniform flow of the refrigerant.

[0079] The first group of flow guide holes 101 and the second group of flow guide holes 102 can select the number of sub-paths of the multiple sub-pipeline 120 according to the actual load condition.

[0080] For example, when the heat exchanger 200 works as a condenser and is full load, the number of effective sub-paths at the inlet of the heat exchanger 200 needs to reach the maximum, at this time the inner layer pipe 131 rotates to the first group of flow guide holes 101 and the multiple outer flow guide holes 12 are completely overlapped. When the heat exchanger 200 works as a condenser and is in intermediate load or small load, the amount of refrigerant required to flow in the heat exchanger 200 is less, at this time the number of refrigerant flow paths needs to be reduced to increase the refrigerant side heat exchange capacity, therefore the number of effective sub-paths at the inlet of the heat exchanger 200 can be reduced by about one half, at this time the inner layer pipe 131 rotates to the second group of flow guide holes 102 and the multiple outer flow guide holes 12 are completely overlapped.

[0081] When the heat exchanger 200 works as an evaporator, the pressure drop of the refrigerant has a great influence on the performance of the heat exchanger 200, and 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 the maximum, and the inner layer tube 131 is rotated to completely overlap the first group of flow guide holes 101 and the plurality of outer flow guide holes 12.

[0082] The number of branches of the heat exchanger 200 is adjusted according to the actual load, so that the heat exchanger 200 can work at the optimal number of branches under various working conditions, and the performance of the heat exchanger 200 is improved.

[0083] In some embodiments of the present application, as shown in Figure 12 The indoor heat exchanger or the outdoor heat exchanger connected with the distribution unit 100 includes fins 210, a plurality of U-shaped heat exchange tubes 220, and a flute-shaped tube 230.

[0084] The fins 210 are stacked and arranged at intervals in the thickness direction. The plurality of U-shaped heat exchange tubes 220 are inserted into the fins 210 and arranged at intervals along the length direction of the fins 210, and one end of each U-shaped heat exchange tube 220 is connected with one shunt pipe 120. The flute-shaped tube 230 is connected to the other end of the plurality of U-shaped heat exchange tubes 220.

[0085] For example, the heat exchanger 200 is configured in a single-row structure, that is, one row of U-shaped heat exchange tubes 220 is arranged along the thickness direction of the fins 210, and the plurality of U-shaped heat exchange tubes 220 are connected with the shunt pipe 120 on the same side of the fins 210.

[0086] As shown in Figure 3 When the heat exchanger 200 works as a condenser and under full load conditions, the flow directions of the plurality of U-shaped heat exchange tubes 220 connected with the first group of flow guide holes 101 are the same, and the other end of the plurality of U-shaped heat exchange tubes 220 is connected through the connecting flute-shaped tube 230 to make the refrigerant converge at one place and then distributed to the plurality of U-shaped heat exchange tubes 220, so that the refrigerant can fully flow in the U-shaped heat exchange tubes 220, and the overall performance of the heat exchanger 200 is improved.

[0087] As shown in Figure 4 When the heat exchanger 200 works as a condenser and under intermediate load or small load conditions, the flow directions of the plurality of U-shaped heat exchange tubes 220 connected with 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 works as a condenser and under full load conditions.

[0088] As shown in Figure 5 When the heat exchanger 200 works as an evaporator, the flow directions of the plurality of U-shaped heat exchange tubes 220 connected with the first group of flow guide holes 101 are the same, and the other end of the plurality of U-shaped heat exchange tubes 220 is connected through the connecting flute-shaped tube 230 to make the refrigerant converge at one place and then converge to the distributor 130, so that the refrigerant can fully flow in the U-shaped heat exchange tubes 220, and the overall performance of the heat exchanger 200 is improved.

[0089] Further, as shown in Figure 12 The indoor heat exchanger or the outdoor heat exchanger 200 connected with the distribution unit 100 further comprises a U-shaped supercooling pipe 240.

[0090] The U-shaped supercooling pipe 240 is inserted into the fin 210 and located at the lower part of the U-shaped heat exchange pipe 220. One end of the U-shaped supercooling pipe 240 is connected with the flute pipe 230, and the other end is connected with the throttling assembly. The structure of the U-shaped supercooling pipe 240 is the same as that of the U-shaped heat exchange pipe 220. The U-shaped supercooling pipe 240 can increase the volume of the circulating refrigerant of the heat exchanger 200, so as to accommodate more liquid refrigerant, thereby enhancing heat exchange.

[0091] Other configurations and operations according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0092] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example.

[0093] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioner comprising: a compressor for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas to power the refrigerant; an indoor heat exchanger and an outdoor heat exchanger, one of which serves as an evaporator and the other as a condenser; a throttling assembly for controlling the flow of refrigerant; a refrigerant circulation circuit connected to the compressor, the indoor heat exchanger, the throttling assembly, and the outdoor heat exchanger; characterized in that the refrigerant circulation circuit comprises a distribution unit comprising: a main pipe connected to the compressor; a plurality of branch pipes, each connected to the indoor heat exchanger or the outdoor heat exchanger; a distributor having a main passage at one end and a plurality of branch passages connected to the main passage at the other end, the main pipe being connected to the main passage and the branch pipes being connected to the branch passages; wherein the distributor comprises an inner layer pipe and an outer layer pipe, the inner layer pipe being configured with a plurality of inner flow guide holes arranged at intervals in the circumferential direction, the plurality of inner flow guide holes comprising a first group of flow guide holes and a second group of flow guide holes, the outer layer pipe being configured with a plurality of outer flow guide holes arranged at intervals in the circumferential direction, the inner layer pipe and the outer layer pipe being rotatable between a first relative position and a second relative position, the first group of flow guide holes being in communication with a plurality of the outer flow guide holes to form a first flow guide passage at the first relative position, and the second group of flow guide holes being in communication with a plurality of the outer flow guide holes to form a second flow guide passage at the second relative position.

2. The air conditioner of claim 1, wherein one end of the outer layer pipe is configured with a closed end face, the outer flow guide holes are formed on the outer peripheral surface adjacent to the one end of the outer layer pipe, the one end of the inner layer pipe is stopped at the closed end face, and the inner flow guide holes are formed on the outer peripheral surface adjacent to the one end of the inner layer pipe.

3. The air conditioner of claim 1, wherein further comprising: a driver mounted on the outer peripheral side of the outer layer pipe, the driver driving the inner layer pipe and the outer layer pipe to rotate relatively between the first relative position and the second relative position.

4. The air conditioner of claim 1, wherein the outer layer pipe is configured with a distribution joint portion extending to the radially outer side at the position corresponding to each of the flow guide holes, and the plurality of branch pipes are installed one-to-one on the distribution joint portions.

5. The air conditioner of claim 1, wherein the plurality of outer flow guide holes are uniformly arranged in the circumferential direction of the outer layer pipe, the first group of flow guide holes among the plurality of inner flow guide holes are uniformly arranged in the circumferential direction of the inner layer pipe, and the second group of flow guide holes among the plurality of inner flow guide holes are uniformly arranged in the circumferential direction of the inner layer pipe.

6. The air conditioner of claim 1, wherein the plurality of outer flow guide holes and the plurality of inner flow guide holes are circular holes with equal diameters.

7. The air conditioner of claim 1, wherein the number of the first group of flow guide holes is twice the number of the second group of flow guide holes, and each of the second group of flow guide holes is located between two adjacent first group of flow guide holes in the circumferential direction.

8. The air conditioner of claim 7, wherein the first group of flow guide holes adjacent to the second group of flow guide holes in the circumferential direction are symmetrically arranged with respect to the second group of flow guide holes.

9. The air conditioner of claim 1, wherein the indoor heat exchanger or the outdoor heat exchanger connected to the distribution unit comprises: fins stacked and arranged at intervals in the thickness direction. A plurality of U-shaped heat exchange pipes, a plurality of the U-shaped heat exchange pipes are inserted into the fins and are arranged at intervals along the length direction of the fins, one end of each of the U-shaped heat exchange pipes is connected with one of the distribution pipes; A flute-shaped pipe connected with the other end of the plurality of U-shaped heat exchange pipes.

10. The air conditioner of claim 9, wherein The indoor heat exchanger or the outdoor heat exchanger connected with the distribution unit further comprises: A U-shaped supercooling pipe inserted into the fins and located at the lower part of the plurality of U-shaped heat exchange pipes, one end of the U-shaped supercooling pipe is connected with the flute-shaped pipe, and the other end is connected with the throttling assembly.

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