Flow divider and air conditioner having the same

Abstract

The application provides a flow divider and an air conditioner with the same, which comprises a flow dividing structure, the flow dividing structure having a first transition section, a second transition section and a flow dividing section connected in sequence, the first transition section being communicated with an inlet of the flow dividing structure at an end away from the second transition section, and the flow dividing section forming a flow dividing outlet of the flow dividing structure at an end away from the second transition section; wherein, along an extension direction of the first transition section to the second transition section, a flow passage cross-sectional area of the first transition section gradually increases, and a flow passage cross-sectional area of the second transition section gradually decreases. Through the technical problem provided by the application, the technical problem of a large scouring sound of the flow divider in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow divider, in particular to a flow divider and an air conditioner with the same. BACKGROUND

[0002] At present, with the development of air conditioning technology, users have higher and higher requirements for air conditioning systems. The existing air conditioner produces a refrigerant flushing sound about 20s after starting to operate in cooling mode. The low-frequency sound has strong penetration, and because the evaporator has a large area, the noise radiation area is wide when the refrigerant flows into the evaporator from the outdoor unit, affecting user comfort. In the prior art, in order to reduce the noise caused by refrigerant flushing, the opening degree of the electronic expansion valve is generally adjusted.

[0003] However, adjusting the opening degree of the electronic expansion valve needs to be adjusted adaptively according to the amount of refrigerant, and the adjustment mode of the opening degree of the electronic expansion valve is complex, and cannot effectively reduce the refrigerant flushing sound. SUMMARY

[0004] The main purpose of the present application is to provide a flow divider and an air conditioner with the same, so as to solve the technical problem of large flushing sound of the flow divider in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a flow divider is provided, comprising:

[0006] A flow dividing structure, the flow dividing structure has a first transition section, a second transition section and a flow dividing section connected in sequence, one end of the first transition section away from the second transition section is in communication with an inlet of the flow dividing structure, and one end of the flow dividing section away from the second transition section forms a flow dividing outlet of the flow dividing structure.

[0007] Wherein, along the extension direction from the first transition section to the second transition section, the flow passage cross-sectional area of the first transition section gradually increases, and the flow passage cross-sectional area of the second transition section gradually decreases.

[0008] Further, the length of the second transition section is less than the length of the first transition section.

[0009] Further, the second transition section is a first conical section, the cone angle of the first conical section is a, and 40°≤a≤50°; and / or,

[0010] The length of the first transition section is L2, the length of the second transition section is L4, and 11≤L2 / L4≤15; and / or,

[0011] The flow passage cross-sectional area of the first transition section is S2, and the flow passage cross-sectional area of the second transition section is S4, and 2≤S2 / S4≤6.

[0012] Further, the flow dividing structure further has a throat section, the throat section is arranged between the second transition section and the flow dividing section.

[0013] Further, the length of the first transition section is L2, the length of the diversion section is L5, the length of the throat section is L1, and the total length of the flow divider is L; wherein 0.01×L2 2 +0.003×L5+0.001×L1 2 +72=L.

[0014] Further, the flow passage cross-sectional area of the throat section is S1, the flow passage cross-sectional area of the first transition section is S2, and 2≤S2 / S1≤6; and / or,

[0015] The length of the throat section is L1, the length of the first transition section is L2, and 9≤L2 / L1≤11.

[0016] Further, the flow divider further has an inlet section, the inlet section is connected to one end of the first transition section away from the second transition section, and one end of the inlet section away from the first transition section forms an inlet;

[0017] The flow passage cross-sectional area of the inlet section is S3, the flow passage cross-sectional area of the first transition section is S2, and 1.04≤S2 / S3≤1.24; and / or,

[0018] The length of the inlet section is L3, the length of the first transition section is L2, and 4.5≤L3 / L2≤6.5.

[0019] Further, the first transition section is a conical section.

[0020] Further, the flow divider comprises:

[0021] A first flow divider shell, the first flow divider shell being provided with the first transition section;

[0022] A second flow divider shell, the second flow divider shell being mounted on the first flow divider shell, the first flow divider shell being provided with the second transition section and the diversion section.

[0023] Further, the second flow divider shell is sleeved on the first flow divider shell.

[0024] Further, the second flow divider shell is provided with a mounting channel, the mounting channel being arranged at one end of the second transition section away from the diversion section, one end of the mounting channel close to the second transition section having a positioning step, and the end portion of the first flow divider shell abutting against the positioning step.

[0025] According to another aspect of the present application, there is provided an air conditioner comprising the flow divider provided above.

[0026] The technical scheme of the present application is applied to the fluid at the inlet of the flow dividing structure, which is first slowed down by the first transition section, and then rapidly increased in speed in the second transition section, so that the fluid forms vortex flow in high-speed movement, thereby making the gas-liquid two-phase of the refrigerant fully mixed, and then entering the flow dividing section. With the increase of the flow resistance loss of the refrigerant in the flow dividing section, the speed decreases until the outlet. Since the flow passage cross-sectional area of the first transition section is gradually increased, no vortex flow is generated; the vortex flow is generated in the second transition section, and the flow passage cross-sectional area of the second transition section is gradually reduced, thereby making the vortex size corresponding to the vortex flow small, avoiding the generation of large-size vortex, so that the noise generated by the large-size vortex can be avoided, the noise source is weakened, and thus the scouring sound of the refrigerant is lower, and the scouring sound can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof, make an explanation of the present application complete, and do not constitute an improper limitation of the present application. In the drawings:

[0028] Fig. 1 A sectional view of a flow divider provided according to an embodiment of the present application is shown;

[0029] Fig. 2 A structural schematic view of a flow divider provided according to an embodiment of the present application is shown;

[0030] Fig. 3 A velocity cross-section cloud chart of a flow divider provided according to an embodiment of the present application is shown;

[0031] Fig. 4 An outlet velocity cloud chart of a flow divider provided according to an embodiment of the present application is shown;

[0032] Fig. 5 An internal vortex schematic view of a flow divider provided according to an embodiment of the present application is shown;

[0033] Fig. 6 An internal vortex schematic view of another flow divider is shown.

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] 10, flow dividing structure; 11, first transition section; 12, second transition section; 13, flow dividing section; 14, throat section; 15, inlet section; 16, first flow dividing shell; 17, second flow dividing shell. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] As Figs. 1-2 shown, the embodiment one of the present application provides a flow divider, which comprises a flow dividing structure 10, the flow dividing structure 10 has a first transition section 11, a second transition section 12 and a flow dividing section 13 connected in sequence, the first transition section 11 is communicated with the inlet of the flow dividing structure 10 at one end away from the second transition section 12, and the flow dividing section 13 forms the flow dividing outlet of the flow dividing structure 10 at one end away from the second transition section 12. Wherein, along the extension direction of the first transition section 11 to the second transition section 12, the flow passage cross-sectional area of the first transition section 11 gradually increases, and the flow passage cross-sectional area of the second transition section 12 gradually decreases.

[0038] Specifically, the inlet of the flow divider in the embodiment is communicated with the refrigerant. By adopting such structure, the fluid in the inlet of the flow dividing structure 10 is first slowed down through the first transition section 11, and then rapidly accelerated in the second transition section 12, so that the fluid forms a vortex flow in high-speed motion, thereby making the gas-liquid two-phase of the refrigerant fully mixed, and after mixing, entering the flow dividing section 13. With the increase of the flow resistance loss of the refrigerant in the flow dividing section 13, the speed decreases until it flows to the outlet, and then flows into the heat exchange pipes of the evaporator. Since the flow passage cross-sectional area of the first transition section 11 gradually increases, no vortex flow is generated; the vortex flow is generated in the second transition section 12, and the flow passage cross-sectional area of the second transition section 12 gradually decreases, thereby making the vortex size corresponding to the vortex flow small, avoiding the generation of large-size vortex, so as to avoid the noise generated by large-size vortex, weaken the noise source, and thus make the scouring sound of the refrigerant lower, which can effectively reduce the scouring sound.

[0039] It should be noted that the flow passage cross-sectional area of the first transition section 11 can be understood as the cross-sectional area perpendicular to the extension direction of the first transition section 11, and the flow passage cross-sectional area of the second transition section 12 can be immediately understood as the cross-sectional area perpendicular to the extension direction of the second transition section 12. The flow passage cross-sectional area in the present application can be understood as the cross-sectional area perpendicular to the extension direction of the corresponding structure.

[0040] Preferably, the length of the first transition section 11 is 46mm, and the length of the second transition section 12 is 3.5mm.

[0041] Specifically, the flow dividing section 13 in the embodiment is multiple, each flow dividing section 13 has a flow dividing outlet. The multiple flow dividing sections 13 are arranged around the second transition section 12, and the multiple flow dividing sections 13 are connected with the second transition section 12. The refrigerant enters the multiple flow dividing sections 13 after being accelerated by the second transition section 12, and finally flows out through the flow dividing outlet of each flow dividing section 13.

[0042] In this embodiment, the length of the second transition section 12 is less than the length of the first transition section 11. This structural arrangement facilitates rapid acceleration of the refrigerant within the second transition section 12, enabling high-speed refrigerant flow and thus better formation of vortices, thereby promoting thorough mixing of the gas and liquid phases of the refrigerant.

[0043] Specifically, in this embodiment, the second transition section 12 is a first conical section with a cone angle of α, where 40°≤α≤50°. This structural arrangement facilitates rapid refrigerant acceleration within the second transition section 12, allowing the refrigerant to flow at a higher speed.

[0044] Specifically, the length of the first transition section 11 is L2, and the length of the second transition section 12 is L4, where 11≤L2 / L4≤15. This arrangement ensures that the refrigerant passes through a sufficiently long first transition section 11 and experiences a certain deceleration within it, while rapidly accelerating within the second transition section 12. This facilitates the generation of smaller vortices within the second transition section 12, thereby better reducing the refrigerant scouring noise.

[0045] In this embodiment, the flow cross-sectional area of ​​the first transition section 11 is S2, and the flow cross-sectional area of ​​the second transition section 12 is S4, where 2≤S2 / S4≤6. This arrangement allows the refrigerant to sufficiently reduce its flow velocity within the larger flow cross-section of the first transition section 11, better avoiding the possibility of vortices forming within the first transition section 11, thereby facilitating a better reduction in scouring noise.

[0046] In this embodiment, the flow splitting structure 10 also has a throat 14, which is disposed between the second transition section 12 and the flow splitting section 13. This allows the refrigerant to enter the throat 14 via the second transition section 12. The refrigerant liquid film in the throat 14 becomes thinner, and the flow pattern in the corresponding gas phase becomes closer to a mist-like flow, thereby improving the flow splitting performance. Furthermore, experimental verification has shown that by setting the throat 14, the refrigerant flushing noise is effectively reduced and its duration is very short, greatly improving user comfort.

[0047] Specifically, the length of the first transition section 11 is L2, the length of the branch section 13 is L5, the length of the throat section 14 is L1, and the total length of the branch section is L; where 0.01 × L2 2 +0.003×L5+0.001×L1 2 +72 = L. This configuration facilitates further optimization of the dimensional relationships between the first transition section 11, the flow splitter section 13, the throat section 14, and the total length of the flow splitter. This allows for better reduction of vortex generation and a reduction of scouring noise generated during refrigerant flow under the combined action of the first transition section 11, the flow splitter section 13, and the throat section 14.

[0048] Specifically, in this embodiment, the flow cross-sectional area of ​​the throat section 14 is S1, and the flow cross-sectional area of ​​the first transition section 11 is S2, where 2 ≤ S2 / S1 ≤ 4. This structural arrangement allows the flow cross-sectional area of ​​the throat section 14 to be smaller than that of the first transition section 11, thereby maintaining a higher refrigerant flow velocity within the throat section 14. This facilitates the formation of vortices, ensuring thorough mixing of the gas and liquid phases of the refrigerant, improving mixing uniformity, and reducing the vortex size before the mixture enters the flow divider section 13. Therefore, this arrangement improves flow uniformity while reducing refrigerant scouring noise.

[0049] Specifically, in this embodiment, the length of the throat section 14 is L1, and the length of the first transition section 11 is L2, where 9 ≤ L2 / L1 ≤ 11. This structural arrangement allows the refrigerant in the throat section 14 to maintain a high flow velocity while avoiding the generation of excessively large vortices along the longitudinal direction. This facilitates thorough mixing of the gas and liquid phases of the refrigerant, improving mixing uniformity. After mixing, the refrigerant enters the flow distribution section 13, and the vortex size is reduced. Therefore, this arrangement further improves flow distribution uniformity and reduces refrigerant scouring noise.

[0050] Specifically, the throat section 14 can be a flow channel with a constant cross-section.

[0051] In this embodiment, the diversion structure 10 also has an inlet section 15, which is connected to the end of the first transition section 11 away from the second transition section 12, and the end of the inlet section 15 away from the first transition section 11 forms an inlet.

[0052] Specifically, in this embodiment, the flow cross-sectional area of ​​the inlet section 15 is S3, and the flow cross-sectional area of ​​the first transition section 11 is S2, where 1.04 ≤ S2 / S3 ≤ 1.24. This structural arrangement facilitates an effective reduction in the refrigerant flow velocity at the inlet section 15 via the first transition section 11, preventing the refrigerant from generating large vortices due to excessive flow velocity at the first transition section 11, thereby avoiding excessively high refrigerant scouring noise.

[0053] Specifically, in this embodiment, the length of the inlet section 15 is L3, and the length of the first transition section 11 is L2, where 4.5 ≤ L3 / L2 ≤ 6.5. This structural arrangement allows the refrigerant to be sufficiently decelerated in the first transition section 11, preventing the refrigerant velocity from becoming too high. This better avoids the formation of large vortices due to high flow velocity in the first transition section 11, thus more effectively reducing scouring noise.

[0054] In this embodiment, the first transition segment 11 is a tapered segment.

[0055] Specifically, the flow splitting structure 10 includes a first flow splitting housing 16 and a second flow splitting housing 17. A first transition section 11 is provided on the first flow splitting housing 16. The second flow splitting housing 17 is mounted on the first flow splitting housing 16, and a second transition section 12 and a flow splitting section 13 are provided on the first flow splitting housing 16. By adopting such a split structure, the first flow splitting housing 16 and the second flow splitting housing 17 are separately arranged, which facilitates the manufacturing of the first transition channel and the second transition channel, thereby reducing the manufacturing difficulty.

[0056] In this embodiment, the second diversion housing 17 is fitted onto the first diversion housing 16. This structural arrangement facilitates installation, reduces manufacturing difficulty, and improves installation efficiency.

[0057] Specifically, in this embodiment, the second diversion housing 17 is provided with an installation channel, which is located at the end of the second transition section 12 away from the diversion section 13. The end of the installation channel near the second transition section 12 has a positioning step, and the end of the first diversion housing 16 abuts against the positioning step. This structural arrangement facilitates the installation and positioning of the first diversion housing 16, thereby facilitating the installation, positioning, and connection of the first diversion housing 16 and the second diversion housing 17.

[0058] Preferably, in this embodiment, the flow cross-sectional area of ​​the first transition section 11 is 14% larger than that of the inlet section 15. The first transition section 11 is gradually expanding, and its length is 4.5 times that of the inlet section 15. Before entering the throat section 14, the refrigerant passes through the second transition section 12, forming a gradually tapered shape with a corresponding cone angle of 45°. The throat is designed to have dimensions 3 times smaller than the cross-sectional area of ​​the transition section, and its length should be 9 times smaller than the length of the transition section. This design not only enables efficient refrigerant diversion but also effectively solves the problem of refrigerant scouring noise in air conditioning systems.

[0059] like Fig. 3 and 4As shown, specifically, the internal structure of the distributor in this embodiment is Y-shaped, and the refrigerant enters from the inlet section 15 during cooling. Assuming the refrigerant enters the distributor at a speed of 5 m / s, it then enters the first transition section 11. The first transition section 11 should be designed to have a cross-sectional area 14% larger than the inlet section 15. The first transition section 11 is gradually expanding, and its length should be 4.5 times larger than the length of the inlet section 15. At this point, the kinetic energy of the refrigerant decreases within the flow channel, and its speed drops to 4.7 m / s. Subsequently, the refrigerant enters the second transition section 12. Before entering the throat section 14, the refrigerant should form a gradually tapering shape with a corresponding cone angle of 45°. The velocity gradient within the flow channel increases, and the high-speed and low-speed regions begin to differentiate, with the speed increasing to 8.8 m / s. Subsequently, the refrigerant enters the throat section 14, where its velocity increases from 8.8 m / s to 16 m / s. The throat section 14 is designed to have a cross-sectional area three times smaller than that of the transition section, and its length nine times smaller. This high-speed motion creates vortices, ensuring thorough mixing of the refrigerant gas and liquid phases. The refrigerant then enters each branch section 13, where its velocity decreases as friction loss increases, until it reaches the branch outlet of each distributor, eventually flowing into the evaporator coils for heat exchange. In this embodiment, the distributor not only thins the refrigerant liquid film in the throat section 14, resulting in a more mist-like flow pattern in the gas phase and thus improving distribution performance, but also significantly reduces and shortens the duration of refrigerant scouring noise in experimental verification, greatly enhancing user comfort.

[0060] As shown in the table below and Fig. 5 and Fig. 6 As shown, a comparison of the internal velocities of the flow divider in this patent application with flow dividers of other sizes reveals that its throat velocity is significantly reduced by 36%, and the internal velocity gradient is significantly decreased. This results in a more uniform flow field at the flow divider outlet, effectively improving the flow divider's performance. A large portion of airflow noise is generated by large-scale vortices. The flow divider in this patent application effectively reduces the size of these large-scale vortices in the diffusion section, weakening the noise source. This explains why the refrigerant flushing noise is lower.

[0061]

[0062] Embodiment 2 of the present invention provides an air conditioner, including the splitter provided in Embodiment 1 above.

[0063] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: they can efficiently divert refrigerant and effectively reduce the noise of air conditioning refrigerant flushing.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shunt, characterized in that Comprising: A flow distribution structure (10) having a first transition section (11), a second transition section (12) and a flow distribution section (13) connected in sequence, the first transition section (11) being communicated with an inlet of the flow distribution structure (10) at one end away from the second transition section (12), and the flow distribution section (13) forming a flow distribution outlet of the flow distribution structure (10) at one end away from the second transition section (12); Wherein, along the extension direction of the first transition section (11) to the second transition section (12), the flow passage cross-sectional area of the first transition section (11) gradually increases, and the flow passage cross-sectional area of the second transition section (12) gradually decreases; The flow distribution structure (10) further has a throat section (14) arranged between the second transition section (12) and the flow distribution section (13); Wherein, the flow passage cross-sectional area of the throat section (14) is S1, the flow passage cross-sectional area of the first transition section (11) is S2, 2≤S2 / S1≤6; and / or, The length of the throat section (14) is L1, the length of the first transition section (11) is L2, 9≤L2 / L1≤11.

2. The shunt of claim 1, wherein, The length of the second transition section (12) is less than the length of the first transition section (11).

3. The shunt of claim 1, wherein, The second transition section (12) is a first conical section, the cone angle of the first conical section is α, 40°≤α≤50°; and / or, The length of the first transition section (11) is L2, the length of the second transition section (12) is L4, 11≤L2 / L4≤15; and / or, The flow passage cross-sectional area of the first transition section (11) is S2, the flow passage cross-sectional area of the second transition section (12) is S4, 2≤S2 / S4≤6.

4. The shunt of claim 1, wherein, The length of the first transition section (11) is L2, the length of the flow distribution section (13) is L5, the length of the throat section (14) is L1, and the total length of the flow distributor is L; wherein 0.01 x L2 2 + 0.003 x L5 + 0.001 x L1 2 + 72 = L.

5. The shunt of claim 1, wherein, The flow distribution structure (10) further has an inlet section (15) connected with one end of the first transition section (11) away from the second transition section (12), and the inlet section (15) forms the inlet at one end away from the first transition section (11); The flow passage cross-sectional area of the inlet section (15) is S3, the flow passage cross-sectional area of the first transition section (11) is S2, 1.04≤S2 / S3≤1.24; and / or, The length of the inlet section (15) is L3, the length of the first transition section (11) is L2, 4.5≤L2 / L3≤6.

5.

6. The shunt of claim 1, wherein, The first transition section (11) is a conical section.

7. The shunt of claim 1, wherein, The flow distribution structure (10) comprises: A first flow distribution shell (16) having the first transition section (11) arranged thereon; A second flow distribution shell (17) mounted on the first flow distribution shell (16), the first flow distribution shell (16) having the second transition section (12) and the flow distribution section (13) arranged thereon.

8. The shunt of claim 7, wherein, The second flow distribution shell (17) is sleeved on the first flow distribution shell (16).

9. The shunt of claim 8, wherein, The second shunt shell (17) is provided with a mounting channel, which is arranged at one end of the second transition section (12) away from the shunt section (13), and has a positioning step at one end of the second transition section (12), and the end of the first shunt shell (16) is abutted at the positioning step.

10. An air conditioner characterized by comprising: A shunt according to any one of claims 1 to 9.

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