A splitter and air conditioner having the same

Abstract

The present invention provides a branch body and an air conditioner having the same, wherein the branch body comprises a lower nozzle assembly and an upper flow diversion assembly, wherein the lower nozzle assembly and the upper flow diversion assembly are fixedly connected, wherein the lower nozzle assembly comprises a liquid inlet section and a nozzle hole, wherein the upper flow diversion assembly comprises a mixing chamber and an outlet flow diversion section, wherein the gas-liquid two-phase refrigerant entering the branch body enters the mixing chamber through the nozzle hole, and flows out of the branch body through the outlet flow diversion section after mixing in the mixing chamber. The present invention, through the arrangement of the nozzle hole and the mixing chamber, sprays the refrigerant onto the upper wall of the mixing chamber and then reflects it, and secondary mixing occurs with the refrigerant entering the mixing chamber later, thereby improving the mixing uniformity of the two-phase refrigerant in the branch body, and the mixing chamber with an arc-shaped or streamlined inner wall provides a positive effect on reducing the pressure drop and noise of the branch body. The present invention has a simple and practical structure, improves the mixing uniformity of the two-phase refrigerant, reduces the pressure drop and noise, and improves the user experience.

Description

Technical Field

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

[0002] In the prior art, air conditioner evaporators are mostly in the form of multi-way parallel connection. Only when the refrigerant is equally distributed to each branch can the heat exchanger be efficiently utilized. The branch body is usually installed between the throttling element and the evaporator. Its function is to evenly distribute the refrigerant to each branch of the evaporator.

[0003] Usually, due to the limited space inside the air conditioner, the liquid inlet section in front of the split body needs to make several turns before it can be inserted into the split body. The two-phase refrigerant undergoes phase separation under the action of centrifugal force, causing the refrigerant entering the split body to show a stratified flow trend, which ultimately causes the refrigerant to not flow evenly into the branches of the evaporator, affecting the heat exchange effect of the evaporator. Summary of the invention

[0004] The problem solved by the present invention is that in the prior art, the two-phase refrigerant undergoes phase separation under the action of centrifugal force, causing the refrigerant entering the branch body to show a stratified flow trend, resulting in the refrigerant not being evenly distributed to each branch, affecting the heat exchange effect of the heat exchanger.

[0005] In order to solve the above problems, the present invention provides a branch body, including a lower nozzle assembly and an upper diverter assembly, the lower nozzle assembly and the upper diverter assembly are fixedly connected, the lower nozzle assembly includes a liquid inlet section and a nozzle hole, the upper diverter assembly includes a mixing chamber and an outlet diverter section, the gas-liquid two-phase refrigerant entering the branch body enters the mixing chamber through the nozzle hole, and flows out of the branch body through the outlet diverter section after mixing in the mixing chamber.

[0006] By adding a throttling nozzle in front of the branch body, the mixing degree of the gas-liquid two-phase refrigerant can be enhanced and the uniformity of the liquid separation can be improved. This setting can accelerate the refrigerant and pressurize it to spray into the mixing chamber. The refrigerant sprayed out through the nozzle hole is sprayed onto the inner wall surface of the mixing chamber and then reflected and mixed with the subsequently injected refrigerant, thereby improving the mixing uniformity of the refrigerant.

[0007] Furthermore, the ratio of the inner diameter of the nozzle hole to the inner diameter of the liquid inlet section is denoted as a, and the value of a is between 0.35 and 0.6.

[0008] The use of a nozzle will result in greater pressure loss and noise. By limiting the ratio of the inner diameter of the nozzle hole to the inner diameter of the liquid inlet section within the above range, the pressure loss and noise of the refrigerant can be reduced while ensuring uniform distribution of the refrigerant, thereby achieving better air conditioning effects and improving user satisfaction. Preferably, a=0.45 or a=0.5.

[0009] Furthermore, the lower nozzle assembly also includes an expansion section, one end of which is connected to the nozzle hole, and the other end is connected to the mixing chamber, and the inner diameter of the connection end between the cavity formed by the expansion section and the nozzle hole is smaller than the inner diameter of the connection end between the cavity formed by the expansion section and the mixing chamber.

[0010] The liquid inlet section, nozzle hole and expansion section enable the lower end nozzle assembly to form a zoom-out type nozzle, so that the process of the refrigerant entering the mixing chamber is smoother, and the speed of the refrigerant entering the mixing chamber is increased while reducing the pressure drop, thereby improving the mixing uniformity of the gas-liquid two-phase refrigerant.

[0011] Furthermore, the expansion section includes an arc segment, a streamline segment and a cavity formed around each of them, the arc segment is arranged on a side close to the nozzle hole, the streamline segment is arranged on a side close to the mixing chamber, the streamline segment is tangentially connected to the arc segment, and the arc segment is tangentially connected to the nozzle hole.

[0012] The setting of the arc segment makes the flow of the refrigerant smoother after passing through the nozzle hole, so as to reduce the pressure drop loss caused by the branch body. The streamline segment is tangentially connected to the mixing chamber to form a smooth transition, and will not make the mixing chamber too large, so as to meet the requirements of the existing air-conditioning indoor unit for the size of the branch body.

[0013] Furthermore, the arc segment is a smooth transition arc, both ends of which are smoothly connected to the nozzle hole and the streamline segment respectively, and the ratio of the radius of the smooth transition arc to the inner diameter of the nozzle hole is denoted as b, and the value of b is between 2 and 5.

[0014] This arrangement allows the flow direction of the refrigerant to change at any time, thereby making the process smoother and effectively reducing the pressure drop inside the branch body.

[0015] Furthermore, the mixing chamber includes a cylindrical cavity and an arc-top cavity, one end of the cylindrical cavity is smoothly connected to the lower nozzle assembly, and the other end is smoothly connected to the arc-top cavity, and the inner wall of the arc-top cavity away from the lower nozzle assembly is arranged in an arc-shaped top.

[0016] This arrangement allows the refrigerant sprayed from the nozzle hole to be reflected in all directions when it hits the top of the arc-top shaped cavity, and produces secondary mixing with the refrigerant that enters the mixing cavity later, thereby avoiding a large pressure drop. At this time, the continuous liquid-phase refrigerant entering the mixing cavity is broken up, thereby increasing the mixing uniformity of the gas-liquid two-phase refrigerant. At the same time, due to the smooth connection between the cylindrical cavity and the lower nozzle assembly, and between the arc-top shaped cavity and the cylindrical cavity, the broken refrigerant is more likely to form a vortex when flowing along the inner wall of the mixing cavity, thereby causing a reflux phenomenon. Under the combined effect of the secondary mixing and the reflux phenomenon, the mixing uniformity of the gas-liquid two-phase refrigerant is greatly improved, which has a positive impact on improving the refrigerant distribution uniformity of the branch body.

[0017] Furthermore, the arc-top-shaped cavity is a hemispherical cavity, and the radius of the hemispherical cavity is equal to the radius of the circular cross-section in the cylindrical cavity.

[0018] This setting can ensure the tangential connection between the cylindrical cavity and the arc-top cavity, which helps the refrigerant to form a reflux phenomenon, thereby improving its mixing efficiency. In this case, a considerable portion of the refrigerant that hits the top of the hemispherical cavity flows around along the inner wall surface of the hemispherical cavity. In the process of smooth flow, when it reaches the vicinity of the nozzle hole along the inner wall of the mixing chamber and the expansion section, it is driven by the refrigerant ejected from the nozzle hole to form a vortex-shaped reflux fluid. Combined with the setting of the outlet hole, the mixing of the refrigerant can be accelerated, thereby improving the mixing uniformity of the refrigerant in the branch body, improving the heat exchange efficiency of the subsequent evaporator, and enhancing the user experience.

[0019] Furthermore, the height of the cylindrical cavity is denoted as h, and the value range of h is between 0 and 3 mm.

[0020] When the height of the cylindrical cavity is within the above-mentioned range, the refrigerant passing through the lower end nozzle assembly can quickly pass through the cylindrical cavity and impact on the arc-top cavity to form a four-sided reflection. When the cylindrical cavity is too high, the refrigerant passing through the lower end nozzle assembly is affected too much by the backflow during the flow process, resulting in a small reflection range when it impacts on the arc-top cavity, affecting the subsequent uniform mixing of the gas-liquid two-phase refrigerant.

[0021] Furthermore, the outlet flow splitting section includes a plurality of outlet holes and outlet pipes, the plurality of outlet holes are arranged on the cavity wall of the mixing cavity at equal intervals and symmetrically distributed, and the outlet pipes are connected to the outlet holes in a one-to-one correspondence.

[0022] This setting can ensure that the mixed flow of the gas-liquid two-phase refrigerant in the mixing chamber is not affected by the outlet position, and can also ensure that the pressure on each outlet hole is the same, thereby ensuring that the refrigerant flowing out of each outlet hole is equal, so that the refrigerant flowing into each branch of the evaporator after passing through the branch body is evenly distributed, thereby improving the heat exchange efficiency of the evaporator and further improving the user experience.

[0023] The invention also discloses an air conditioner, which adopts the splitter as described above.

[0024] The advantages of the air conditioner and the above-mentioned splitter over the prior art are the same, which will not be repeated here.

[0025] Compared with the prior art, the branch body and the air conditioner having the same provided by the present invention have the following advantages: through the arrangement of the nozzle hole and the mixing chamber, the refrigerant is sprayed onto the upper wall of the mixing chamber and then reflected, and secondary mixing occurs with the refrigerant that enters the mixing chamber later, thereby improving the mixing uniformity of the two-phase refrigerant in the branch body. In addition, the streamlined inner wall of the mixing chamber makes it easier for the refrigerant to undergo secondary mixing, thereby achieving uniform distribution of the two-phase refrigerant by the branch body. At the same time, the coordinated arrangement between the nozzle hole and the liquid inlet section, coupled with the mixing chamber having an arc-shaped or streamlined inner wall, provides a positive effect on reducing the pressure drop and noise of the branch body. The present invention has a simple and practical structure, and a secondary mixing phenomenon is formed after the nozzle hole, which greatly improves the mixing uniformity of the two-phase refrigerant, reduces the pressure drop and noise caused by the arrangement of the nozzle hole, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic cross-sectional structural diagram of a branch body according to an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the top view of the structure of the splitter according to an embodiment of the present invention;

[0028] Figure 3 It is a schematic cross-sectional structural diagram of the nozzle assembly at the lower end of the branch body according to an embodiment of the present invention;

[0029] Figure 4 It is a schematic cross-sectional structural diagram of the upper end flow dividing component of the flow dividing body according to an embodiment of the present invention;

[0030] Description of reference numerals:

[0031] 1-lower end nozzle assembly; 11-liquid inlet section; 12-nozzle hole; 13-expansion section; 131-arc section; 132-streamline section; 2-upper end diversion assembly; 21-mixing chamber; 211-cylindrical cavity; 212-arc-top cavity; 22-outlet diversion section; 221-outlet hole; 222-outlet pipe. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] A splitter and an air conditioner having the same according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] This embodiment provides a splitter body, such as Figure 1-4 As shown, it includes a lower nozzle assembly 1 and an upper diverter assembly 2, the lower nozzle assembly 1 and the upper diverter assembly 2 are fixedly connected, the lower nozzle assembly 1 includes a liquid inlet section 11 and a nozzle hole 12, the upper diverter assembly 2 includes a mixing chamber 21 and an outlet diverter section 22, the gas-liquid two-phase refrigerant entering the diverter body enters the mixing chamber 21 through the nozzle hole 12, and flows out of the diverter body through the outlet diverter section 22 after being mixed in the mixing chamber 21.

[0036] In the prior art, due to the limitation of the internal space size of the air conditioner, the liquid inlet pipe in front of the branch body needs to make multiple turns before it can be inserted into the branch body. Under the action of centrifugal force, the refrigerant entering the branch body tends to flow in layers, which ultimately causes the refrigerant to not flow evenly into the branches of the evaporator. By adding a throttling nozzle in front of the branch body, the mixing degree of the gas-liquid two-phase refrigerant can be enhanced, and the uniformity of the liquid separation can be improved. Specifically, the upper end branch assembly 2 is arranged downstream of the lower end nozzle assembly 1. In this embodiment, the downstream refers to the downstream of the refrigerant flow direction during the operation of the air conditioner. This arrangement can accelerate the refrigerant and pressurize it to spray into the mixing chamber 21. The refrigerant sprayed through the nozzle hole 12 is sprayed to the inner wall surface of the mixing chamber 21 and then reflected, and mixed with the subsequently injected refrigerant, thereby improving the mixing uniformity of the refrigerant.

[0037] In some of the embodiments, the ratio of the inner diameter of the nozzle hole 12 to the inner diameter of the liquid inlet section 11 is denoted as a, and the value of a is between 0.35 and 0.6. The research process found that the use of a nozzle will cause a large pressure loss and noise. Limiting the ratio of the inner diameter of the nozzle hole 12 to the inner diameter of the liquid inlet section 11 within the above range can reduce the pressure loss and noise of the refrigerant while ensuring uniform distribution of the refrigerant, thereby obtaining a better air conditioning effect and improving user satisfaction. Preferably, a=0.45 or a=0.5.

[0038] As an embodiment of the present invention, the lower end nozzle assembly 1 also includes an expansion section 13, one end of the expansion section 13 is connected to the nozzle hole 12, and the other end is connected to the mixing chamber 21, the inner diameter of the connection end between the cavity formed by the expansion section 13 and the nozzle hole 12 is smaller than the inner diameter of the connection end between the cavity formed by the expansion section 13 and the mixing chamber 21, the liquid inlet section 11, the nozzle hole 12, and the expansion section 13 make the lower end nozzle assembly 1 form a zoom-type nozzle, so that the process of the refrigerant entering the mixing chamber 21 is smoother, and the speed of the refrigerant entering the mixing chamber 21 is increased while reducing the pressure drop, thereby improving the mixing uniformity of the gas-liquid two-phase refrigerant.

[0039] Specifically, the expansion section 13 includes an arc segment 131, a streamline segment 132 and a cavity formed around each of them, the arc segment 131 is arranged on the side close to the nozzle hole 12, the streamline segment 132 is arranged on the side close to the mixing chamber 21, the streamline segment 132 is tangentially connected to the arc segment 131, and the arc segment 131 is tangentially connected to the nozzle hole 12. The arrangement of the arc segment 131 makes the flow of the refrigerant smoother after passing through the nozzle hole 12, so as to reduce the pressure drop loss caused by the branch body, the streamline segment 132 is tangentially connected to the mixing chamber 21, thereby forming a smooth transition, and will not make the mixing chamber 21 too large, so as to meet the requirements of the existing air-conditioning indoor unit for the size of the branch body.

[0040] Better, such as Figure 3 As shown, the arc segment 131 is a smooth transition arc, and the two ends of the smooth transition arc are smoothly connected to the nozzle hole 12 and the streamline segment 132 respectively. The ratio of the radius of the smooth transition arc to the inner diameter of the nozzle hole 12 is recorded as b, and the value of b is between 2 and 5. This setting allows the flow direction of the refrigerant to change at any time, thereby making the process smoother and effectively reducing the pressure drop inside the branch body. In one of the preferred embodiments, the streamline segment 132 is a gradually expanding streamline from the arc segment 131 to the mixing chamber 21, or the streamline segment 132 is an arc line, and the inner wall of the cavity formed by the streamline segment 132 is a spherical inner wall cavity, which is conducive to the connection with the mixing chamber 21.

[0041] In the present embodiment, the mixing chamber 21 comprises a cylindrical cavity 211 and an arc-top cavity 212, one end of the cylindrical cavity 211 is smoothly connected to the lower nozzle assembly 1, and the other end is smoothly connected to the arc-top cavity 212, and the inner wall of the arc-top cavity 212 away from the lower nozzle assembly 1 is arranged in an arc-shaped top, which makes the refrigerant sprayed from the nozzle hole 12 reflect around when hitting the top of the arc-top cavity 212, and produces secondary mixing with the refrigerant entering the mixing chamber 21 later, thereby avoiding a large pressure drop. At this time, the continuous liquid-phase refrigerant entering the mixing chamber 21 is broken up, which increases the uniformity of mixing the gas-liquid two-phase refrigerant. At the same time, due to the gap between the cylindrical cavity 211 and the lower nozzle assembly 1, and between the arc-top cavity 212 and the cylindrical cavity 211 The smooth connection between them makes it easier for the dispersed refrigerant to form vortices when flowing along the inner wall of the mixing chamber 21, thereby causing reflux. Under the combined effect of secondary mixing and reflux, the mixing uniformity of the gas-liquid two-phase refrigerant is greatly improved, which has a positive effect on improving the refrigerant distribution uniformity of the branch body. Specifically, in the present embodiment, one end of the cylindrical cavity 211 is smoothly connected to the streamline segment 132, so that a smooth connection among the arc segment 131, the streamline segment 132, the cylindrical cavity 211 and the arc-top cavity 212 is formed on one side of the outlet of the nozzle hole 12. This arrangement can effectively reduce the pressure loss of the refrigerant when it flows in the branch body, is beneficial to the flow mixing of the refrigerant, and improves its mixing uniformity. In some of the embodiments, the smooth connection refers to a tangential connection.

[0042] Specifically in the present embodiment, the arc-top cavity 212 is a hemispherical cavity, and the radius of the hemispherical cavity is equal to the radius of the circular cross-section in the cylindrical cavity 211. This arrangement can ensure the tangential connection between the cylindrical cavity 211 and the arc-top cavity 212, which helps the refrigerant to form a reflux phenomenon, thereby improving its mixing efficiency. In this case, a considerable portion of the refrigerant that hits the top of the hemispherical cavity flows around along the inner wall surface of the hemispherical cavity. In the process of smooth flow, when it arrives near the nozzle hole 12 along the inner wall of the mixing chamber 21 and the expansion section 13, it is driven by the refrigerant ejected from the nozzle hole 12 to form a vortex-shaped reflux fluid, which, in conjunction with the arrangement of the outlet hole 221, can accelerate the refrigerant. Mixing, thereby improving the mixing uniformity of the refrigerant in the branch body, improving the heat exchange efficiency of the subsequent evaporator, and enhancing the user experience. In some optional embodiments, the streamline segment 132 is an arc, and the arc segment 131 is a smooth transition arc. The radius of the arc line, the radius of the smooth transition arc, the radius of the circular cross-section in the cylindrical cavity 211, and the radius of the hemispherical cavity are equal. This setting can easily achieve tangential connection between the arc segment 131 and the streamline segment 132, between the streamline segment 132 and the cylindrical cavity 211, and between the cylindrical cavity 211 and the hemispherical cavity, thereby forming a smooth transition between them, which is more conducive to the formation of reflux phenomenon, thereby ensuring the mixing uniformity of the refrigerant.

[0043] In some of the embodiments, the height of the cylindrical cavity 211 is denoted as h, and the value range of h is between 0 and 3 mm, preferably h=1.5 mm. When the height of the cylindrical cavity 211 is within the above-mentioned value range, the refrigerant passing through the lower end nozzle assembly 1 can quickly pass through the cylindrical cavity 211 and impact on the arc-shaped cavity 212 to form four-sided reflection. When the cylindrical cavity 211 is too high, the refrigerant passing through the lower end nozzle assembly 1 is affected too much by the reflux during the flow process, resulting in a small reflection range when it impacts the arc-shaped cavity 212, affecting the subsequent uniform mixing of the gas-liquid two-phase refrigerant.

[0044] As an embodiment of the present invention, the outlet diversion section 22 includes a plurality of outlet holes 221 and an outlet pipe 222. The outlet holes 221 are arranged on the cavity wall of the mixing cavity 21. The outlet pipes 222 are connected to the outlet holes 221 one by one. The outlet holes 221 are used to transport the evenly mixed two-phase refrigerant to the evaporator through the outlet pipes 222, which can effectively improve the evaporation efficiency of the air conditioner.

[0045] Better, such as Figure 2As shown, a plurality of outlet holes 221 are arranged on the cavity wall of the mixing chamber 21 at equal intervals and symmetrically distributed. This arrangement can ensure that the mixed flow of the gas-liquid two-phase refrigerant in the mixing chamber 21 is not affected by the outlet position, and can also ensure that the pressure on each outlet hole 221 is the same, thereby ensuring that the refrigerant flowing out of each outlet hole 221 is equal, so that the refrigerant flowing into each branch of the evaporator after passing through the branch body is evenly distributed, thereby improving the heat exchange efficiency of the evaporator and further improving the user experience.

[0046] In some of the embodiments, the diameter of the outlet hole 221 is denoted as d, and the value range of d is between 2.5 and 6 mm. This setting can ensure the smooth cooperation between the outlet pipe 222 and the capillary tube at the front end of the evaporator, thereby ensuring that the diverted mixed refrigerant can smoothly enter the evaporator, so that the air conditioner can operate normally.

[0047] As an optional embodiment, the lower nozzle assembly 1 and the upper flow diverter assembly 2 are fixedly connected by welding.

[0048] It should be noted that the splitter provided in this embodiment is used for mixed flow diversion of refrigerants in air conditioners, and the refrigerants include but are not limited to R410A and R32. Experimental studies have found that when the refrigerant flow rate is in the range of 90kg / h-180kg / h, the splitter has good distribution characteristics.

[0049] Example 2

[0050] This embodiment discloses an air conditioner, which includes the splitter as described in Embodiment 1.

[0051] The air conditioner provided in this embodiment has the same advantages as the splitter described in Embodiment 1 over the prior art, which will not be described in detail here.

[0052] The air conditioner comprises a liquid inlet pipe and an outlet capillary tube, wherein the liquid inlet pipe is fixedly connected to the liquid inlet section 11, and the outlet capillary tube is fixedly connected to the outlet pipe 222, so that the branch body is connected to the pipeline system of the air conditioner.

[0053] As an optional embodiment, the fixed connection mode between the liquid inlet pipe and the liquid inlet section 11 is a welding connection, and the fixed connection mode between the outlet capillary and the outlet pipe 222 is a welding connection.

[0054] It should be noted that all the terms used in the present invention to indicate directionality and position, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "lower", "tail end", "head end", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0055] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A splitter, characterized in that: The invention comprises a lower nozzle assembly (1) and an upper flow diverter assembly (2), wherein the lower nozzle assembly (1) and the upper flow diverter assembly (2) are fixedly connected, the lower nozzle assembly (1) comprises a liquid inlet section (11) and a nozzle hole (12), and the upper flow diverter assembly (2) comprises a mixing chamber (21) and an outlet flow diverter section (22), and the gas-liquid two-phase refrigerant entering the diverter body enters the mixing chamber (21) through the nozzle hole (12), is mixed in the mixing chamber (21), and then passes through the mixing chamber (21) to cool the gas-liquid two-phase refrigerant. The liquid flows out of the branch body through the outlet branch section (22); the mixing chamber (21) comprises a cylindrical chamber (211) and an arc-top chamber (212); one end of the cylindrical chamber (211) is smoothly connected to the lower nozzle assembly (1), and the other end is smoothly connected to the arc-top chamber (212); the inner wall of the arc-top chamber (212) on the side away from the lower nozzle assembly (1) is arranged in an arc-shaped top; the lower nozzle assembly (1) also comprises an expansion The expansion section (13) comprises an arc section (131), a streamline section (132), and a cavity formed around the arc section (131). One end of the expansion section (13) is connected to the nozzle hole (12), and the other end is connected to the mixing cavity (21). The inner diameter of the cavity formed by the expansion section (13) and the connecting end of the nozzle hole (12) is smaller than the inner diameter of the cavity formed by the expansion section (13) and the connecting end of the mixing cavity (21). The expansion section (13) comprises an arc section (131), a streamline section (132), and a cavity formed around each of the arc section (131). The streamline segment (131) is arranged on a side close to the nozzle hole (12), the streamline segment (132) is arranged on a side close to the mixing chamber (21), the streamline segment (132) is tangentially connected to the arc segment (131), and the arc segment (131) is tangentially connected to the nozzle hole (12); the streamline segment (132) is a gradually expanding streamline in a direction from the arc segment (131) to the mixing chamber (21), or the streamline segment (132) is a circular arc.

2. The splitter according to claim 1, characterized in that: The ratio of the inner diameter of the nozzle hole (12) to the inner diameter of the liquid inlet section (11) is denoted as a, and the value of a is between 0.35 and 0.

6.

3. The splitter according to claim 1, characterized in that: The arc segment (131) is a smooth transition arc, and the two ends of the smooth transition arc are smoothly connected to the nozzle hole (12) and the streamline segment (132) respectively. The ratio of the radius of the smooth transition arc to the inner diameter of the nozzle hole (12) is denoted as b, and the value of b is between 2 and 5.

4. The splitter according to claim 1, characterized in that: The arc-top-shaped cavity (212) is a hemispherical cavity, and the radius of the hemispherical cavity is equal to the radius of the circular cross section in the cylindrical cavity (211).

5. The splitter according to claim 1, characterized in that: The height of the cylindrical cavity (211) is denoted as h, and the value range of h is between 0 and 3 mm.

6. The splitter according to any one of claims 1 to 5, characterized in that: The outlet flow splitting section (22) comprises a plurality of outlet holes (221) and an outlet pipe (222); the plurality of outlet holes (221) are arranged on the cavity wall of the mixing cavity (21) at equal intervals and in a symmetrical distribution; the outlet pipe (222) is connected to the outlet holes (221) in a one-to-one correspondence.

7. An air conditioner, characterized in that: The air conditioner comprises a splitter as claimed in any one of claims 1 to 6.

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