Flow divider, refrigerating system and air conditioner

Abstract

The utility model provides a flow divider, a refrigerating system and an air conditioner, and belongs to the technical field of liquid dividers. The flow divider comprises a liquid dividing head, and a plurality of branch pipes are connected to the liquid dividing head. The branch pipes comprise at least one reducing branch pipe, each reducing branch pipe comprises a capillary pipe section, a reducing section and a connecting pipe diameter section which are connected with one another, one end of each capillary pipe section is integrally formed with the liquid separation head, and the capillary pipe sections and the reducing sections are integrally formed. In the variable-diameter branch pipe of the flow divider, the capillary pipe section and the variable-diameter section are integrally designed, so that potential quality hazards such as weld beading, overburning, welding blockage and welding leakage caused by welding of the capillary pipe and other copper pipes can be completely eradicated, the production cost of the flow divider can be reduced, and the quality of the whole flow divider can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of liquid distributor, especially to a flow divider, refrigeration system and air conditioner. BACKGROUND

[0002] The flow divider is a common fluid distribution device, widely used in refrigeration, air conditioning, chemical industry, aerospace and other fields. Its core function is to evenly distribute fluid (such as refrigerant, liquid or gas) to multiple branches to meet the flow requirements of different components or systems. The flow divider is usually composed of a main body and multiple branch pipes, and the main body is provided with a flow dividing hole or channel inside, through which the fluid is evenly distributed to each branch pipe. The flow divider usually includes a liquid distribution head, a capillary tube section with throttling effect, and a common pipe diameter end for structural assembly, and the capillary tube section and the common pipe diameter end are fixed by flaring welding. However, there are many types of liquid distribution heads on the market, and the liquid distribution head of the same flow divider involves multiple capillary tubes. Different specifications of capillary tubes and different specifications of transition pipes need to be welded separately, resulting in a large number of capillary tube welding products and specifications, large production, and great production pressure on manual brazing posts. On the other hand, the capillary tube has a small diameter and is difficult to weld. When welding with a common pipe diameter copper pipe, the welding posture is easy to make the worker feel fatigue, and the welder training is difficult. In addition, abnormal problems such as welding beads, overburning, welding blockage and welding leakage may occur during welding.

[0003] Therefore, it is necessary to improve the existing liquid distributor that needs to be welded to realize the connection of different pipe sections to overcome the defects of the prior art. UTILITY MODEL CONTENTS

[0004] To overcome the problems in the related art, one of the purposes of the utility model is to provide a flow divider. In the variable diameter branch pipe of the flow divider, the capillary tube section and the variable diameter section are designed integrally, which can eliminate the quality hidden dangers such as welding beads, overburning, welding blockage and welding leakage caused by welding of capillary tubes and other copper pipes, and help to reduce the production cost of the flow divider and improve the quality of the entire flow divider.

[0005] A flow divider includes a liquid distribution head, and a plurality of branch pipes connected to the liquid distribution head.

[0006] Among the plurality of branch pipes, at least one variable diameter branch pipe is included, which comprises a capillary tube section, a variable diameter section and a connection pipe diameter section connected to each other. One end of the capillary tube section is connected to the liquid distribution head, and the capillary tube section and the variable diameter section are integrally formed.

[0007] The shunt can be used in a refrigeration system of an air conditioner, and in an embodiment, the shunt specifically works as follows: high-pressure liquid refrigerant from a condenser enters a distribution head. The distribution head can uniformly distribute the refrigerant to each branch pipe. The refrigerant entering the variable-diameter branch pipe first passes through a capillary tube section for preliminary throttling and pressure reduction, at which time the pressure and flow rate of the refrigerant change. Then, the refrigerant flows into the variable-diameter section, and as the inner diameter of the variable-diameter section gradually increases, the flow rate of the refrigerant gradually decreases, and the pressure is further stabilized, avoiding the impact of flow rate sudden change on the subsequent pipeline. Finally, the refrigerant buffered by the variable-diameter section enters the connecting pipe diameter section smoothly and then flows to an evaporator for evaporation and heat absorption, achieving a refrigeration effect.

[0008] In the traditional shunt, the capillary tube is welded with other copper pipes, and quality problems such as welding protrusions, overburning, welding blockage, and welding leakage are prone to occur. In the embodiment, the capillary tube section and the variable-diameter section of the variable-diameter branch pipe are integrally formed, eliminating these welding quality risks. For example, in a long-term vibration and temperature change environment, the welding points are prone to loosen and leak, and the integrally formed structure has no welding points, avoiding such situations and ensuring the stability and reliability of the shunt throughout its service life, thereby improving the quality of the entire shunt.

[0009] Moreover, the shunt of the present application adopts an integral molding process, reducing the welding process, reducing labor costs and dependence on professional welders, saving the investment and maintenance costs of welding equipment, and reducing the consumption of welding materials.

[0010] In the preferred technical solution of the present application, the length of the variable-diameter section is 5mm-120mm.

[0011] The length of the variable-diameter section in the present application is in the range of 5mm-120mm, which can effectively reduce the instantaneous change rate of the speed of the fluid when it enters the connecting pipe diameter section from the capillary tube section. When the refrigerant flows through the variable-diameter section, the speed gradually adjusts, avoiding turbulence and pressure fluctuations caused by sudden changes in speed. The design of the length of the variable-diameter section in the embodiment can ensure smooth transition of the refrigerant and will not excessively increase the resistance, ensuring stable flow of the refrigerant in the entire pipeline and improving the reliability of the refrigeration system.

[0012] In the preferred technical solution of the present application, the diameter of the capillary tube section is D1, the diameter of the connecting pipe diameter section is D2, and the length of the variable-diameter section is in a positive proportional relationship with D2 / D1.

[0013] In the embodiment, the length of the variable-diameter section is determined according to the proportional relationship of D2 / D1, which can accurately match the diameter difference between the capillary tube section and the connecting pipe diameter section, so that the speed change of the refrigerant when it enters the connecting pipe diameter section from the capillary tube section is more gentle, ensuring stable flow of the refrigerant in the pipeline, reducing energy loss, and improving the operating efficiency of the refrigeration system. Stable refrigerant flow helps to improve the uniformity of the shunt in distributing the refrigerant.

[0014] In the preferable technical scheme of the utility model, the liquid distribution head comprises a liquid distribution main body, a liquid inlet and a plurality of liquid outlets are arranged on the liquid distribution main body, and one branch pipe is connected to each liquid outlet;

[0015] A filter screen is arranged in the liquid distribution main body.

[0016] The filter screen arranged in the liquid distribution main body can effectively intercept impurities in the refrigerant. During the production, installation and operation of the refrigeration system, some impurities will inevitably be produced. If these impurities enter the branch pipe and the evaporator, problems such as pipeline blockage, compressor wear and the like may be caused. For example, metal debris may scratch the internal components of the compressor, affect the normal operation of the compressor and reduce the service life thereof.

[0017] The filter screen not only plays a role of filtering impurities, but also plays a role of buffering and dispersing the flow of the refrigerant. When the refrigerant passes through the filter screen, the flow rate is reduced and the flow is more uniform. This helps the refrigerant to be more evenly diffused in the liquid distribution main body, and thus the amount of refrigerant flowing out of each liquid outlet is more balanced.

[0018] In the preferable technical scheme of the utility model, the liquid distribution main body comprises a first shell and a second shell connected to each other, the liquid inlet is arranged on the first shell, and the liquid outlet is arranged on the second shell;

[0019] The filter screen is arranged in the first shell and close to the liquid inlet; the inner wall of the first shell is provided with a clamping groove, the edge of the filter screen is provided with a clamping piece, and the clamping piece and the clamping groove are clamped to each other.

[0020] The filter screen is arranged in the first shell and close to the liquid inlet, so that the refrigerant can be filtered as soon as it enters the liquid distribution main body. The large commercial central air conditioning system is large, and the refrigerant flows a long distance in the pipeline, so it is more likely to mix with impurities. If these impurities enter the branch pipe or the evaporator, problems such as pipeline blockage, compressor wear and the like may be caused. Through the interception of the filter screen, the key components of the entire refrigeration system are effectively protected, the faults caused by impurities are reduced, the service life of the system is prolonged, and the maintenance cost is reduced. Through the first shell and the second shell connected to each other, the installation of the liquid distribution main body is more convenient, and during use, only the connecting bolts between the first shell and the second shell need to be unscrewed, the first shell is opened, the old filter screen can be taken out, and after the new filter screen is replaced, the first shell is reinstalled. This design greatly shortens the maintenance time and improves the maintenance efficiency.

[0021] In the preferable technical scheme of the utility model, the edge of the filter screen is provided with a mounting port, and the mounting port is provided with the clamping piece; the clamping piece comprises a mounting column, a clamping spring and a clamping head, the mounting column is fixed in the mounting port, and the axis of the mounting column is arranged along the center to the edge of the filter screen, the clamping spring is sleeved on the mounting column, one end of the clamping spring is fixedly connected with the mounting column, and the opposite end is provided with the clamping head, and the clamping head protrudes outward from the edge of the filter screen.

[0022] The special structure design of the clamping piece makes the installation of the filter screen more convenient and reliable. In the use process, the installation of the filter screen can be completed after the clamping head is clamped in the clamping groove by compressing the clamping spring. When the filter needs to be replaced, the clamping spring is compressed, the clamping head is separated from the clamping groove, and the filter screen can be easily taken out. Compared with the traditional fixing mode such as glue sticking or complex bolt fixing, the installation and replacement time is greatly saved, the maintenance efficiency is improved, and the maintenance cost is reduced.

[0023] In the preferable technical scheme of the utility model, the first shell is further provided with a guide groove, the axial direction of the guide groove is the same as the axial direction of the first shell, and the guide groove extends from the edge of the first shell to the clamping groove.

[0024] The design of the guide groove makes the filter screen more conveniently clamped in the clamping groove. In the installation process, the clamping head on the filter screen is aligned with the guide groove on the first shell, and is slowly slid downward along the guide groove. In the sliding process, the clamping head on the clamping piece gradually approaches the clamping groove. When the filter screen reaches the clamping groove position, the elastic force of the clamping spring makes the clamping head automatically clamped into the clamping groove, and the installation of the filter screen is completed.

[0025] In the preferable technical scheme of the utility model, at least one variable diameter section is arranged in each variable diameter branch pipe; and the diameter of the variable diameter section gradually increases or gradually decreases along the direction from the capillary tube section to the connecting pipe diameter section.

[0026] The change mode and number of the variable diameter section can be adjusted according to actual refrigeration requirements. For an air conditioning system with large refrigeration capacity, the number of variable diameter sections can be increased or the diameter change range of the variable diameter section can be adjusted to better adapt to the throttling and buffering requirements of high-flow refrigerant; for a small air conditioning system, the variable diameter section design can be simplified to reduce the cost.

[0027] The second purpose of the utility model is to provide a refrigeration system comprising the flow divider.

[0028] The third purpose of the utility model is to provide an air conditioner comprising the refrigeration system.

[0029] The utility model discloses a beneficial effect for:

[0030] The utility model provides a kind of flow divider, the flow divider includes liquid distribution head, and multiple branch pipes are connected on liquid distribution head. Among multiple branch pipes, including at least one reducing branch pipe, reducing branch pipe includes mutually connected capillary tube section, reducing section and connecting pipe diameter section, one end of capillary tube section and liquid distribution head, capillary tube section and reducing section are integrally formed. In the reducing branch pipe of the flow divider, because capillary tube section and reducing section adopt integrated design, the structure of integrated molding has no welding point, thus can avoid the welding of capillary tube and other copper pipe in traditional flow divider, and it is easy to appear welding tumor, overburning, welding block, welding leakage and other quality problems;And the process of integrated molding can reduce welding procedure in manufacturing process, reduces the dependence on welding personnel, reduces manpower cost, saves welding equipment investment and maintenance cost and welding material consumption, to reduce the production cost of flow divider.

[0031] The application also provides a refrigeration system and an air conditioner comprising the above flow divider, the refrigeration system uses the above flow divider for distribution, and the flow divider is reliable in quality and low in production cost, can ensure that the flow divider can work stably for a long time, thereby ensuring the stable operation of the refrigeration system. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the schematic diagram of the flow divider provided in the embodiment of the utility model;

[0033] Figure 2 It is the schematic diagram of the flow divider not including liquid distribution head when the embodiment of the utility model is provided;

[0034] Figure 3 It is the length schematic diagram of capillary tube section and connecting pipe diameter section when the embodiment of the utility model is provided;

[0035] Figure 4 It is the schematic diagram of the liquid distribution head of the flow divider when the embodiment of the utility model is provided;

[0036] Figure 5 It is the schematic diagram of liquid distribution main body when the embodiment of the utility model is provided;

[0037] Figure 6 It is the schematic diagram of filter screen when the embodiment of the utility model is provided;

[0038] Figure 7 It is the schematic diagram of first shell when the embodiment of the utility model is provided.

[0039] REFERENCE NUMERALS:

[0040] REFERENCE NUMERALS:

[0041] 1, liquid distribution head; 11, liquid inlet; 12, liquid distribution main body; 121, first shell; 1211, guide groove; 1212, clamping groove; 122, second shell; 13, liquid outlet; 2, variable diameter branch pipe; 21, capillary tube section; 22, variable diameter section; 23, connecting pipe diameter section; 3, branch pipe; 4, filter screen; 5, clamping piece; 51, mounting column; 52, clamping spring; 53, clamping head. DETAILED DESCRIPTION

[0042] Preferred embodiments of the present application will be described in more detail with reference to the drawings. Although preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to convey the scope of the present application to those skilled in the art.

[0043] The liquid distribution head on the market is of various types, and the liquid distribution head of the same flow distributor involves various capillary tubes. Different specifications of capillary tubes and different specifications of transition pipes need to be welded separately, resulting in a large number of capillary tube welding product types and specifications, large production, and great production pressure on manual brazing posts. On the other hand, the capillary tube has a small diameter and is difficult to weld. When welding with ordinary diameter copper pipes, the welding posture is easy to make the staff feel fatigue, and the welder training is difficult. In addition, abnormal problems such as welding bumps, overburning, welding blockage, and welding leakage are easy to occur during the welding process.

[0044] Based on this, the present application provides a flow distributor.

[0045] Embodiment 1

[0046] As shown in Figures 1-7 The flow distributor provided by the present embodiment includes a liquid distribution head 1, and a plurality of branch pipes 3 are connected to the liquid distribution head 1.

[0047] Among the plurality of branch pipes 3, at least one variable diameter branch pipe 2 is included, which includes a capillary tube section 21, a variable diameter section 22, and a connecting pipe diameter section 23 connected to each other. One end of the capillary tube section 21 is connected to the liquid distribution head 1, and the capillary tube section 21 and the variable diameter section 22 are integrally formed.

[0048] Specifically, the branch pipes 3 are made of red copper and are all foldable. The flow divider can be used in a refrigeration system of an air conditioner. In an embodiment, the specific working process of the flow divider is as follows: high-pressure liquid refrigerant from a condenser enters the distribution head 1. The distribution head 1 can uniformly distribute the refrigerant to each branch pipe 3. The refrigerant entering the variable-diameter branch pipe 2 first passes through the capillary tube section 21 for preliminary throttling and pressure reduction, at which time the pressure and flow rate of the refrigerant change. Then, the refrigerant flows into the variable-diameter section 22, and since the inner diameter of the variable-diameter section 22 gradually increases, the flow rate of the refrigerant gradually decreases, and the pressure is further stabilized, avoiding the impact of sudden flow rate changes on the subsequent pipeline. Finally, the refrigerant buffered by the variable-diameter section 22 enters the connecting pipe diameter section 23 smoothly, and then flows to the evaporator for evaporation and heat absorption, realizing the refrigeration effect.

[0049] In the traditional flow divider, the capillary tube is welded with other copper pipes, which is prone to quality problems such as welding protrusions, overburning, welding blockage, and welding leakage. In the embodiment, the capillary tube section 21 and the variable-diameter section 22 of the variable-diameter branch pipe 2 are integrally formed, eliminating these welding quality risks. For example, under the long-term vibration and temperature change environment, the welding points are prone to looseness, leakage, and other problems, while the integrally formed structure has no welding points, avoiding such situations and ensuring the stability and reliability of the flow divider throughout its service life, thereby improving the quality of the entire flow divider.

[0050] Moreover, the flow divider of the present application adopts an integrally formed process, reducing the welding process, reducing labor costs and dependence on professional welders, saving the investment and maintenance costs of welding equipment, and the consumption of welding materials.

[0051] In the embodiment, the length of the variable-diameter section 22 is 5mm-120mm.

[0052] The length of the variable-diameter section 22 is in the range of 5mm-120mm, for example, the length of the variable-diameter section 22 is 30mm, which can effectively reduce the instantaneous change rate of the speed of the fluid when it enters the connecting pipe diameter section 23 from the capillary tube section 21. When the refrigerant flows through the variable-diameter section 22, the speed gradually adjusts, avoiding turbulence and pressure fluctuations caused by sudden changes in speed. In the traditional design, if the variable-diameter section 22 is too short (less than 5mm), the refrigerant cannot be fully buffered, which can easily cause local pressure to be too high, affecting system stability; if it is too long (more than 120mm), it will increase the pipeline resistance and cost. The length of the variable-diameter section 22 of the embodiment can ensure smooth transition of the refrigerant and will not excessively increase the resistance, ensuring stable flow of the refrigerant in the entire pipeline and improving the reliability of the refrigeration system.

[0053] And the adjustable range of the length of the variable diameter section 22 is 5mm-120mm, which provides convenience for different air conditioning system working conditions. For commercial central air conditioners with larger refrigerating capacity and larger refrigerant flow, the length of the variable diameter section 22 (such as 30mm in the embodiment) can be appropriately increased to better buffer the refrigerant flow rate and ensure uniform distribution of the refrigerant to the evaporator. For small household air conditioners, a shorter variable diameter section 22 can be selected according to actual needs to reduce costs while meeting performance requirements. This flexibility enables the flow divider to be widely used in various refrigeration systems, improving the product's versatility and market competitiveness.

[0054] Embodiment 2

[0055] This embodiment is an improvement based on Embodiment 1.

[0056] As shown in Figures 1-7 In this embodiment, the diameter of the capillary tube section 21 is D1, the diameter of the connecting tube diameter section 23 is D2, and the length of the variable diameter section 22 is in a positive proportional relationship with D2 / D1.

[0057] In this embodiment, the length of the variable diameter section 22 is determined according to the proportional relationship of D2 / D1, which can accurately match the diameter difference between the capillary tube section 21 and the connecting tube diameter section 23, so that the speed change of the refrigerant when entering the connecting tube diameter section 23 from the capillary tube section 21 is more gentle, ensuring stable flow of the refrigerant in the pipeline, reducing energy loss, and improving the operating efficiency of the refrigeration system. Stable refrigerant flow helps to improve the uniformity of the flow divider's distribution of refrigerant.

[0058] Embodiment 3

[0059] This embodiment is an improvement based on Embodiment 1.

[0060] As shown in Figures 1-7 In this embodiment, the flow distributor 1 includes a flow distributor body 12, the flow distributor body 12 is provided with a liquid inlet 11 and a plurality of liquid outlets 13, and each liquid outlet 13 is connected with a branch pipe 3.

[0061] A filter screen 4 is arranged in the flow distributor body 12.

[0062] Specifically, the distribution main body 12 of the distribution head 1 is made of metal. The distribution main body 12 can be in a cylindrical shape, and a liquid inlet 11 is arranged on the side surface of the distribution main body 12, and the liquid inlet 11 is connected to a refrigerant conveying pipe from a condenser of an air conditioner. At the bottom of the distribution main body 12, six liquid outlets 13 are uniformly distributed, and each of the liquid outlets 13 is connected to a branch pipe 3, of which two are variable-diameter branch pipes 2 and four are ordinary branch pipes 3. Inside the distribution main body 12, a detachable filter screen 4 is arranged near the liquid inlet 11. The filter screen 4 is made of stainless steel, has a mesh diameter of 0.2 mm, and is in a fine mesh structure, which can effectively filter impurities in the refrigerant. If these impurities enter the branch pipes 3 and the evaporator, problems such as pipeline blockage, wear of the compressor, etc. can be caused. For example, metal debris can scratch the internal components of the compressor, affect the normal operation of the compressor, and reduce the service life of the compressor.

[0063] The variable-diameter branch pipe 2 has a structure similar to that of the previous embodiment, and includes a capillary tube section 21, a variable-diameter section 22, and a connecting pipe diameter section 23, and the capillary tube section 21 and the variable-diameter section 22 are integrally formed. The ordinary branch pipe 3 is a copper pipe with a consistent pipe diameter, and the ordinary branch pipe 3 can be connected to other components of the refrigeration system.

[0064] The filter screen not only plays a role in filtering impurities, but also plays a certain buffering and dispersing role for the flow of the refrigerant. When the refrigerant passes through the filter screen 4, the flow rate is reduced, and the flow is more uniform. This helps the refrigerant to be more evenly distributed in the distribution main body 12, and then the amount of refrigerant flowing out of each of the liquid outlets 13 is more balanced.

[0065] The working process of the distributor is as follows: when the air conditioner is running, the high-pressure liquid refrigerant flowing out of the condenser enters the distribution main body 12 through the liquid inlet 11. In the process of the refrigerant entering the distribution main body 12, it first passes through the filter screen 4, which intercepts impurities such as metal debris, welding slag, and scale in the refrigerant, preventing these impurities from entering the branch pipes 3 and the subsequent refrigeration system pipeline. The filtered refrigerant is evenly distributed inside the distribution main body 12, and then flows into the corresponding branch pipes 3 from the eight liquid outlets 13. The refrigerant entering the variable-diameter branch pipe 2 is throttled and depressurized by the capillary tube section 21, and then smoothly enters the connecting pipe diameter section 23 through the variable-diameter section 22, and then flows to the evaporator. The refrigerant in the ordinary branch pipe 3 directly flows to the evaporator, and finally realizes the uniform distribution of the refrigerant in the evaporator, evaporates and absorbs heat, and completes the refrigeration cycle.

[0066] Embodiment 4

[0067] This embodiment is improved on the basis of Embodiment 1.

[0068] As Figures 1-7As shown, in the embodiment, the liquid distribution body 12 comprises a first shell 121 and a second shell 122 connected with each other, the liquid inlet 11 is arranged on the first shell 121, and the liquid outlet 13 is arranged on the second shell 122.

[0069] The filter screen 4 is arranged in the first shell 121 and close to the liquid inlet 11; the inner wall of the first shell 121 is provided with a clamping groove 1212, and the edge of the filter screen 4 is provided with a clamping piece 5 which is clamped with the clamping groove 1212.

[0070] In a specific embodiment, the liquid distribution body 12 is composed of the first shell 121 and the second shell 122, both of which are made of high-strength aluminum alloy material through precise mechanical processing process. The first shell 121 is in the shape of a cuboid, and the second shell 122 is in the shape of a disc, both of which are tightly connected through bolts, and the connecting part is provided with a rubber sealing washer to ensure the sealing of the liquid distribution body 12.

[0071] The filter screen 4 is arranged in the first shell 121 and close to the liquid inlet 11, which can filter the refrigerant as soon as it enters the liquid distribution body 12. The large commercial central air conditioning system is huge, and the refrigerant flows a long distance in the pipeline, so it is more likely to mix with impurities. If these impurities enter the branch pipe 3 or the evaporator, it may cause serious problems such as pipeline blockage, wear of the compressor, etc. Through the interception of the filter screen 4, the key components of the entire refrigeration system are effectively protected, the failures caused by impurities are reduced, the service life of the system is prolonged, and the maintenance cost is reduced. Through the connection of the first shell 121 and the second shell 122, the installation of the liquid distribution body 12 is more convenient, and during use, only the connecting bolts between the first shell 121 and the second shell 122 need to be unscrewed, and the first shell 121 is opened, and the old filter screen 4 can be taken out. After replacing the new filter screen 4, it is reinstalled. This design greatly shortens the maintenance time and improves the maintenance efficiency.

[0072] In the embodiment, the edge of the filter screen 4 is provided with a mounting port, and the clamping piece 5 is arranged at the mounting port; the clamping piece 5 comprises a mounting column 51, a clamping spring 52 and a clamping head 53, the mounting column 51 is fixed in the mounting port, and the axis of the mounting column 51 is arranged from the center to the edge of the filter screen 4, the clamping spring 52 is sleeved on the mounting column 51, one end of the clamping spring 52 is fixedly connected with the mounting column 51, and the opposite end is provided with the clamping head 53, and the clamping head 53 protrudes outward from the edge of the filter screen 4.

[0073] The special structure of the clamping piece 5 makes the installation of the filter screen 4 more convenient and reliable. During use, the installation of the filter screen 4 can be completed by only compressing the clamping spring 52 and clamping the clamping head 53 in the clamping groove 1212. When the filter screen needs to be replaced, the clamping spring 52 is compressed, the clamping head 53 is separated from the clamping groove 1212, and the filter screen 4 can be easily taken out. Compared with the traditional fixing methods such as glue sticking or complex bolt fixing, the installation and replacement time is greatly saved, the maintenance efficiency is improved, and the maintenance cost is reduced.

[0074] In the embodiment, the first shell 121 is further provided with a guide groove 1211, the axial direction of the guide groove 1211 is the same as the axial direction of the first shell 121, and the guide groove 1211 extends from the edge of the first shell 121 to the clamping groove 1212.

[0075] The design of the guide groove 1211 makes the filter screen more convenient to clamp in the clamping groove 1212. During installation, the clamping head 53 on the filter screen 4 is aligned with the guide groove 1211 on the first shell 121, and is slowly slid downward along the guide groove 1211. During the sliding process, the clamping head 53 on the clamping piece 5 gradually approaches the clamping groove 1212. When the filter screen 4 reaches the position of the clamping groove 1212, the elastic force of the clamping spring 52 makes the clamping head 53 automatically clamped into the clamping groove 1212, and the installation of the filter screen 4 is completed.

[0076] Embodiment 5

[0077] The embodiment is improved on the basis of embodiment 1.

[0078] As shown in Figures 1-7 In the embodiment, at least one variable-diameter section 22 is arranged in each variable-diameter branch pipe 2, and the diameter of the variable-diameter section 22 gradually increases or decreases in the direction from the capillary tube section 21 to the connecting pipe diameter section 23.

[0079] In the embodiment, at least one variable-diameter section 22 is arranged in each variable-diameter branch pipe 2, and the diameter of the variable-diameter section 22 gradually changes, which can effectively adjust the flow rate and pressure of the refrigerant. In the embodiment, the variable-diameter section 22 makes the flow rate of the refrigerant smoothly transition during the process of flowing from the capillary tube section 21 to the connecting pipe diameter section 23, avoiding the turbulence and pressure fluctuation caused by sudden change of flow rate. This not only reduces the energy loss of the refrigerant in the pipeline, but also improves the stability of the refrigerant flow, so that the refrigerant can be more uniformly distributed in the evaporator, improving the heat exchange efficiency of the evaporator and the refrigeration performance of the air conditioner.

[0080] The change mode and number of the diameter of the variable diameter section 22 can be adjusted according to actual refrigeration requirements. For an air conditioning system with large refrigeration capacity, the number of the variable diameter section 22 can be increased or the change range of the diameter of the variable diameter section 22 can be adjusted to better adapt to the throttling and buffering requirements of high-flow refrigerant; for a small air conditioning system, the variable diameter section 22 can be simplified to reduce the cost.

[0081] Embodiment 6

[0082] The embodiment provides a refrigeration system comprising the flow divider as described above.

[0083] As shown in Figures 1-7 , the refrigeration system further comprises a condenser, an evaporator, a compressor and related connecting pipelines. The flow divider adopts the flow divider structure described above, and the distribution head 1 is composed of the first shell 121 and the second shell 122 connected to each other. The liquid inlet 11 on the first shell 121 is connected to the pipeline from the condenser, and the plurality of liquid outlets 13 on the second shell 122 are connected to different branch pipes 3. There are three variable diameter branch pipes 2, each of which comprises a capillary tube section 21, a variable diameter section 22 and a connecting pipe diameter section 23, and the capillary tube section 21 and the variable diameter section 22 are integrally formed. The variable diameter section 22 has a length of 30 mm, and the inner diameter gradually increases from 1.5 mm of the capillary tube section 21 to 4 mm of the connecting pipe diameter section 23. A detachable filter screen 4 is arranged in the distribution main body 12, and the clamping piece 5 at the edge of the filter screen 4 is matched with the clamping groove 1212 in the first shell 121 to ensure stable installation.

[0084] The design of the variable diameter branch pipe 2 in the flow divider of the refrigeration system optimizes the throttling and distribution process of the refrigerant. The variable diameter section 22 makes the flow rate and pressure of the refrigerant more stable before entering the evaporator, and the refrigerant can be more uniformly distributed in the evaporator, increasing the utilization rate of the heat exchange area of the evaporator and improving the heat exchange efficiency of the evaporator.

[0085] Embodiment 7

[0086] The embodiment provides an air conditioner comprising the refrigeration system as described above.

[0087] As shown in Figures 1-7 , the flow divider of the refrigeration system of the air conditioner is designed to make the refrigerant more uniformly distributed to each part of the evaporator in the refrigeration system. The structure of the variable diameter branch pipe 2 optimizes the throttling and buffering process of the refrigerant, making the evaporation of the refrigerant in the evaporator more sufficient and improving the heat exchange efficiency of the evaporator. This makes the air conditioner be able to reduce the indoor temperature more quickly and uniformly, creating a more comfortable indoor environment for users.

[0088] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0089] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0090] In addition, it needs to be explained that the use of "first", "second" and the like to limit the parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning if there is no further declaration, so it cannot be understood as a limitation on the protection scope of the present application. The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flow distributor comprising a distribution head (1) to which a plurality of branch pipes (3) are connected, characterized in that: of the plurality of branch pipes (3), at least one variable-diameter branch pipe (2) is included, the variable-diameter branch pipe (2) comprising a capillary tube section (21), a variable-diameter section (22) and a connecting tube diameter section (23) connected to each other, one end of the capillary tube section (21) being connected to the distribution head (1), the capillary tube section (21) being integrally formed with the variable-diameter section (22).

2. The flow distributor according to claim 1, characterized in that: the length of the variable-diameter section (22) is 5-120 mm.

3. The flow distributor according to claim 2, characterized in that: the diameter of the capillary tube section (21) is D1, the diameter of the connecting tube diameter section (23) is D2, and the length of the variable-diameter section (22) is in a positive proportional relationship with D2 / D1.

4. The flow distributor according to any one of claims 1-3, characterized in that: the distribution head (1) comprises a distribution main body (12) provided with a liquid inlet (11) and a plurality of liquid outlets (13), each of the liquid outlets (13) being connected to one of the branch pipes (3); the distribution main body (12) is provided with a filter screen (4).

5. The flow distributor according to claim 4, characterized in that: the distribution main body (12) comprises a first shell (121) and a second shell (122) connected to each other, the liquid inlet (11) being provided on the first shell (121), and the liquid outlets (13) being provided on the second shell (122); the filter screen (4) is provided in the first shell (121) and close to the liquid inlet (11), an inner wall of the first shell (121) is provided with a clamping groove (1212), an edge of the filter screen (4) is provided with a clamping piece (5), and the clamping piece (5) and the clamping groove (1212) are clamped to each other.

6. The flow distributor according to claim 5, characterized in that: an edge of the filter screen (4) is provided with a mounting opening, the mounting opening is provided with the clamping piece (5), the clamping piece (5) comprises a mounting column (51), a clamping spring (52) and a clamping head (53), the mounting column (51) is fixed in the mounting opening, an axis of the mounting column (51) is arranged from the center to the edge of the filter screen (4), the clamping spring (52) is sleeved on the mounting column (51), one end of the clamping spring (52) is fixedly connected with the mounting column (51), and the other end is provided with the clamping head (53), and the clamping head (53) protrudes outward from the edge of the filter screen (4).

7. The flow distributor according to claim 5, characterized in that: the first shell (121) is further provided with a guide groove (1211), an axial direction of the guide groove (1211) is the same as an axial direction of the first shell (121), and the guide groove (1211) extends from the edge of the first shell (121) to the clamping groove (1212).

8. The flow divider according to any one of claims 1-3 or 5-7, characterized in that: In each of the variable-diameter branch pipes (2), at least one variable-diameter section (22) is arranged; the diameter of the variable-diameter section (22) gradually increases or gradually decreases in the direction from the capillary section (21) to the connecting pipe diameter section (23).

9. A refrigeration system characterized by: A refrigeration system comprising the flow divider according to any one of claims 1-8.

10. An air conditioner characterized by comprising: A refrigeration system comprising the flow divider according to claim 9.

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