CN213955697U

CN213955697U - Shunt and air conditioner

Info

Publication number: CN213955697U
Application number: CN202023224159.1U
Authority: CN
Inventors: 宋分平; 郑豪; 谢李高; 王晓宇; 成相茂
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-13
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a shunt and air conditioner, wherein, the shunt includes: a liquid inlet hole; the reflecting cavity is opposite to the liquid inlet hole; the mixing cavity is communicated between the liquid inlet hole and the reflecting cavity; and a plurality of diffluent holes, all with the hybrid chamber intercommunication, the diffluent hole includes keeping away from accelerating hole section and connecting hole section that set gradually in the direction of hybrid chamber, the aperture of accelerating hole section is less than the aperture of connecting hole section. The utility model discloses the shunt that technical scheme provided enables the double-phase refrigerant of gas-liquid and mixes each reposition of redundant personnel branch pipe after abundant evenly distributed, promotes air conditioning system's energy efficiency ratio.

Description

Shunt and air conditioner

Technical Field

The utility model relates to an air conditioner technical field, in particular to shunt and air conditioner.

Background

The existing distributor is commonly used in a refrigeration and air-conditioning pipeline system, and has the function of fully mixing gas-liquid two-phase refrigerants (refrigerants) and then uniformly and equivalently distributing the refrigerants to each branch of an evaporator so as to achieve the optimal energy efficiency ratio. However, in the actual operation of the air conditioning system, for example, the venturi flow divider often causes the phenomena of uneven mixing of gas-liquid two-phase refrigerant, uneven flow rate of liquid refrigerant entering each flow dividing branch pipe, and the like, and the conditions all cause the reduction of the energy efficiency ratio of the air conditioning system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a shunt aims at making the double-phase refrigerant mixture of gas-liquid abundant and evenly distributed to each reposition of redundant personnel branch pipe.

To achieve the above object, the present invention provides a flow divider comprising:

a liquid inlet hole;

the reflecting cavity is opposite to the liquid inlet hole;

the mixing cavity is communicated between the liquid inlet hole and the reflecting cavity; and

a plurality of diffluent holes, all with the hybrid chamber intercommunication, the diffluent hole includes keeping away from accelerated hole section and the connecting hole section that sets gradually in the direction of hybrid chamber, the aperture of accelerated hole section is less than the aperture of connecting hole section.

In one embodiment, a branch flow pipe is connected in the connecting hole section, and the inner diameter of the branch flow pipe is larger than the aperture of the accelerating hole section.

In one embodiment, the ratio of the length of the connecting hole segment to the length of the accelerating hole segment ranges from: 1 to 5.

In one embodiment, the cavity surface of the reflective cavity comprises a cylindrical surface section, a conical surface section connected with the cylindrical surface section, and an arc surface section connected with the small end of the conical surface section, and the conical surface section is arranged in a tapered manner in the direction far away from the cylindrical surface section; the curvature radius range of the cambered surface section is as follows: 0.5mm to 5 mm.

In one embodiment, the ratio of the axial length of the mixing chamber compared to the axial length of the flow diverter is in the range: 0.1 to 0.2; and/or

The ratio range of the axial length of the flow divider compared with the total axial length of the mixing cavity and the flow dividing hole is as follows: 1.1 to 2.

In one embodiment, the aperture of the liquid inlet hole is smaller than or equal to the aperture of the opening of the reflection cavity.

In an embodiment, a refrigerant inlet pipe is connected in the inlet hole, and an inner diameter of the refrigerant inlet pipe is smaller than or equal to a bore diameter of the cavity opening of the reflection cavity.

In an embodiment, a positioning portion is disposed at an edge of an aperture of the liquid inlet hole, and the positioning portion is used for limiting a length of the refrigerant liquid inlet pipe extending into the mixing chamber.

In one embodiment, the positioning portion is provided as a tapered surface that tapers in a direction toward the mixing chamber.

The utility model also provides an air conditioner, including aforementioned shunt.

In the technical scheme of the utility model, the refrigerant of gas-liquid two-phase flows in through the liquid inlet hole, and is not directly distributed to each branch flow pipe, but firstly impacts the reflection cavity and then returns to the mixing cavity to fully mix gas and liquid, and the refrigerant fully mixed at the moment is distributed into each branch flow pipe through the branch flow hole; the aperture of the accelerating hole section is smaller than that of the connecting hole section, so that the refrigerant is further accelerated when flowing through the accelerating holes, and the flow rate of the liquid refrigerant obtained by each shunting hole tends to be consistent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a diverter according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the flow diverter of FIG. 1 at A-A;

fig. 3 is a cross-sectional view at a-a of the flow divider and refrigerant tube of fig. 1 assembled.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Flow divider	11	Liquid inlet hole
12	Mixing chamber	13	Reflective cavity
				14	Flow dividing hole	14a	Accelerating hole section
14b	Connecting hole section	15	Positioning part
				16	Conical boss	17	Fabrication hole
20	Shunt branch pipe	30	Refrigerant feed liquor pipe

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The current flow divider of a common air conditioning system in the market, such as a venturi flow divider, directly distributes gas-liquid two-phase refrigerants which are not fully mixed to each flow dividing branch pipe, so that the flow rates of the liquid refrigerants in each flow dividing branch pipe are inconsistent, an evaporator cannot play a heat exchange role to the maximum extent, and the integral energy efficiency ratio of the air conditioning system is reduced. In view of this, the utility model provides a make the refrigerant mix earlier then shunt with higher speed, refer to fig. 2 and fig. 3 in the embodiment of the utility model relates to an in, be equipped with in this shunt:

a liquid inlet hole 11;

a reflecting cavity 13 opposite to the liquid inlet hole 11;

the mixing cavity 12 is communicated between the liquid inlet hole 11 and the reflecting cavity 13; and

a plurality of reposition of redundant personnel holes 14 all communicate with mixing chamber 12, and reposition of redundant personnel hole 14 includes acceleration hole section 14a and connecting hole section 14b that set gradually in the direction of keeping away from mixing chamber 12, and the aperture of acceleration hole section 14a is less than the aperture of connecting hole section 14 b.

The technical scheme of the utility model is that the reflecting cavity 13 opposite to the liquid inlet hole 11 is adopted, so that the refrigerant is not directly distributed to the branch flow holes 14, but the refrigerant firstly impacts the reflecting cavity 13 and then returns to the mixing cavity 12 for sufficient gas-liquid mixing, and the refrigerant which is sufficiently mixed at the moment is uniformly distributed through the branch flow holes 14; since the aperture of the accelerating hole section 14a is smaller than that of the connecting hole section 14b, the refrigerant is further accelerated when flowing through the accelerating hole section 14a, which is beneficial to the consistency of the liquid refrigerant flow obtained by each branch flow hole 14.

When the flow divider 10 is applied to an air conditioning system, a low-pressure liquid refrigerant flowing out of an expansion valve or a capillary tube flows into the flow divider 10 through a copper tube, and at this time, the refrigerant is ideally completely liquid, but a certain proportion of gaseous refrigerant is mixed in the liquid refrigerant in an actual working condition. At this time, the refrigerant of gas-liquid two phases is reflected to the mixing cavity 12 through the reflection cavity 13 in the flow divider 10, and the refrigerant flows into each branch pipe 20 through the branch holes 14 provided with the accelerating hole sections 14a after being fully mixed, so that the flow rates of the liquid refrigerant obtained by each branch of the evaporator communicated with the branch pipes 20 tend to be consistent, the evaporator further plays a heat exchange role to the maximum, and the energy efficiency ratio of the whole air conditioning system is improved.

Generally, the axes of the inlet holes 11 are arranged to coincide with the axis of the mixing chamber 12, and the distribution holes 14 are evenly spaced along the circumference of the mixing chamber 12. The refrigerant flowing in through the liquid inlet hole 11 is firstly reflected to the central area of the mixing cavity 12 for gas-liquid mixing, and then flows into the branch holes 14 uniformly distributed at intervals on the periphery of the mixing cavity 12, so that the liquid refrigerant in the mixing cavity 12 can be uniformly distributed into the branch holes 14, and the flow rate of the liquid refrigerant obtained by each branch hole 14 tends to be consistent.

In this embodiment, optionally, the material of this shunt 10 adopts red copper, adopts red copper material can promote the fatigue resistance of shunt 10, is favorable to resisting the refrigerant and lasts the effort of assaulting reflection chamber 13, and red copper is more difficult for ageing fracture than brass simultaneously, can improve this shunt 10 life. Further optionally, the flow divider 10 is integrally formed by forging, which can prevent the weld seam at the split joint from affecting the smoothness of the inner surface of the refrigerant flow channel, and reduce the refrigerant flow pressure resistance. However, the design is not limited thereto, and in other embodiments, the flow divider 10 may be formed by casting.

Referring to fig. 2 and 3, in the present embodiment, the connection form of the branch pipes 20 and the flow divider 10 may be a plug-in connection or a non-plug-in connection, and whichever connection form is required to ensure that the refrigerant flowing from the mixing chamber 12 directly into the branch holes 14 can be further accelerated, so as to improve the uniform flow dividing effect. Alternatively, in the plug-in connection, the branch flow pipe 20 is inserted into the connecting hole section 14b and is welded and fixed with the flow divider 10, and the inner diameter of the branch flow pipe 20 is limited to be larger than the hole diameter of the accelerating hole section 14 a. Further, in the non-plug-in type connection, the branch pipe 20 is not inserted into the shunt 10, but is limited by abutting against the outer surface of the shunt 10 and fixed by welding, and the diameter of the accelerating hole section 14a is limited to be smaller than that of the connecting hole section 14 b.

It can be understood that, because the arrangement space of the flow divider 10 in the air conditioning system is very compact, the axial size of the whole flow divider 10 is very limited, and in this situation, how to configure the axial sizes of the cavities and the hole sections plays a crucial role in the effect of the flow divider 10 in uniformly distributing the liquid refrigerant. In this embodiment, optionally, the ratio of the length L2 of the connecting hole section 14b to the length L1 of the accelerating hole section 14a ranges from: 1 to 5; the ratio of the axial length L5 of the mixing chamber 12 compared to the axial length L3 of the flow diverter 10 ranges from: 0.1 to 0.2. Further optionally, the ratio of the axial length L3 of the flow splitter 10 compared to the total axial length L4 of the mixing chamber 12 and the splitter hole 14 ranges from: 1.1 to 2.

It will be appreciated that in the plug-in connection of the branch pipes 20 to the flow divider 10, the length L2 is the effective size of the branch pipes 20 to the flow divider 10. In order to ensure the assembling reliability of the branch pipes 20, the length L2 is relatively determined, and under the condition, if the length L1 is too small, the acceleration effect of the acceleration hole section 14a is very weak; while a length L1 that is too large does not further increase the flow rate of the accelerated refrigerant, but instead encroaches too much on the limited axial space of the flow diverter 10. The mixing cavity 12 with the length L5 being too large can obviously reduce the flow speed of the refrigerant to separate gas-liquid two-phase refrigerant, and the mixing cavity 12 with the length L5 being too small can ensure that the refrigerant has insufficient space to be fully mixed; therefore, the axial length of the mixing cavity 12 is within a reasonable range, which is beneficial to improving the mixing effect of the gas-liquid two-phase refrigerant in the mixing cavity 12. Further, if the total axial length L5 of the mixing chamber 12 and the branch flow hole 14 is too small, the mixing and acceleration effects cannot be ensured at the same time; if the length L5 is too large, that is, the axial length of the liquid inlet hole 11 is very small, the assembling reliability of the refrigerant inlet pipe 20 and the flow divider 10 is very unfavorable.

Referring to fig. 2, in this embodiment, in order to improve the reflection effect of the reflection cavity 13 and facilitate the refrigerant to be more sufficiently mixed in the mixing cavity 12, optionally, the cavity surface of the reflection cavity 13 includes a cylindrical surface section, a conical surface section connected to the cylindrical surface section, and an arc surface section connected to a small end of the conical surface section, and the conical surface section is arranged in a tapered manner in a direction away from the cylindrical surface section; the curvature radius R of the cambered surface section has the following value range: 0.5mm to 5 mm. The conical surface section and the cambered surface section of the reflection cavity 13 are beneficial to reducing the pressure resistance when the refrigerant impacts the reflection cavity 13, and reducing the pressure loss of the refrigerant; the refrigerant flows into the central area of the mixing cavity 12 along the cylindrical surface section, and the rebounded refrigerant is prevented from directly flowing into the diversion hole 14 communicated with the outer side of the mixing cavity 12. After the sizes of the cylindrical surface section and the conical surface section are determined, if the curvature radius R of the arc surface section is too large, namely the arc surface section tends to approach the plane section, the reduction of the pressure resistance is not facilitated; if the curvature radius R of the arc surface section is too small, namely less than 0.5mm, the processing technology cannot accurately realize the fillet. However, the design is not limited thereto, and in other embodiments, the cavity surface of the reflective cavity 13 may be formed by a cylindrical surface alone, a tapered surface alone, or a spherical surface alone.

Referring to fig. 2 and 3, in this embodiment, the refrigerant inlet pipe 30 and the flow divider 10 may be connected in a plug-in manner or a non-plug-in manner, and either connection is required to ensure that most of the refrigerant can bounce to the mixing chamber 12 through the reflection chamber 13 first, rather than directly flow into the flow dividing hole 14 from the periphery of the reflection chamber 13. Optionally, in the plug-in connection, the refrigerant liquid inlet pipe 30 is inserted into the liquid inlet hole 11 and is welded and fixed with the flow divider 10, and at this time, the inner diameter of the refrigerant liquid inlet pipe 30 is limited to be smaller than or equal to the bore diameter of the cavity opening of the reflection cavity 13; further alternatively, the aperture of the liquid inlet hole 11 may be smaller than or equal to the aperture of the opening of the reflective cavity 13, or may be larger than the aperture of the opening of the reflective cavity 13. Further, in the non-plug-in connection, the refrigerant inlet pipe 30 is not inserted into the flow divider 10, but is abutted against the outer surface of the flow divider 10 for limiting and welding fixation, and at this time, the aperture of the liquid inlet hole 11 is limited to be smaller than or equal to the aperture of the cavity opening of the reflection cavity 13.

Referring to fig. 3, in this embodiment, further, a positioning portion 15 is disposed at an edge of an aperture of the liquid inlet hole 11, a limiting structure is disposed on the refrigerant liquid inlet pipe 30 relative to the positioning portion 15, and an end surface of the limiting structure abuts against an end surface of the positioning portion 15, so as to limit a length of the refrigerant liquid inlet pipe 30 extending into the mixing chamber 12. Further alternatively, the positioning portion 15 is provided as a conical surface, and the conical surface is tapered toward the direction close to the mixing chamber 12; the refrigerant inlet pipe 30 is provided with a conical boss 16 corresponding to the conical surface, and the end surface of the conical boss 16 abuts against the conical surface. However, the design is not limited thereto, and in other embodiments, the positioning portion 15 may be a stepped hole. Of course, the positioning portion 15 is a conical surface, which is more convenient to process compared with a stepped hole, and the manufacturing cost of the shunt 10 is reduced on the premise of achieving the same limiting effect.

Referring to fig. 2, in this embodiment, optionally, the axis of the accelerating hole section 14a is set to be matched with the axis of the connecting hole section 14b, so as to avoid the refrigerant from being eccentric when flowing through the two hole sections, which is beneficial to reducing the flow resistance and pressure loss of the refrigerant.

Furthermore, the flow divider 10 is further provided with a process hole 17 in the middle of one end close to the flow dividing hole 14, so that the wall thickness of the welding part of the flow dividing hole 14 tends to be uniform, the welding difficulty of the flow dividing branch pipe 20 and the flow divider 10 is reduced, and the welding quality is improved.

The utility model discloses still provide an air conditioner, this air conditioner includes the shunt, and the concrete structure of this shunt refers to above-mentioned embodiment, because this air conditioner has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary detail here.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A flow divider is characterized in that:

a liquid inlet hole;

the reflecting cavity is opposite to the liquid inlet hole;

2. The flow diverter of claim 1, wherein a branch diverter is connected within the connecting bore section, the branch diverter having an inner diameter greater than an inner diameter of the bore of the acceleration bore section.

3. The shunt of claim 1, wherein the ratio of the length of the connecting orifice segment compared to the length of the accelerating orifice segment is in the range of: 1 to 5.

4. The splitter of claim 1, wherein the facet of the reflective cavity comprises a cylindrical section, a tapered section connected to the cylindrical section, and an arcuate section connected to a small end of the tapered section, the tapered section tapering away from the cylindrical section; the curvature radius range of the cambered surface section is as follows: 0.5mm to 5 mm.

5. The flow diverter according to claim 1, wherein the ratio of the axial length of the mixing chamber compared to the axial length of the flow diverter is in the range of: 0.1 to 0.2; and/or

6. The flow splitter of any of claims 1 to 5, wherein the aperture of the liquid inlet aperture is less than or equal to the aperture of the mouth of the reflector cavity.

7. The flow divider according to any one of claims 1 to 5, wherein a refrigerant inlet pipe is connected in the inlet hole, and an inner diameter of the refrigerant inlet pipe is smaller than or equal to a bore diameter of the reflective cavity.

8. The flow divider of claim 7, wherein the aperture edge of the liquid inlet hole is provided with a positioning portion for limiting the length of the refrigerant liquid inlet pipe extending into the mixing chamber.

9. The flow diverter according to claim 8, wherein the locating portion is provided as a tapered surface that tapers in a direction toward the mixing chamber.

10. An air conditioner characterized by comprising the flow divider of any one of claims 1 to 9.