CN217057733U - Air conditioner - Google Patents

Abstract

The utility model provides an air conditioner, which comprises a shell, a heat exchanger arranged in the shell, a communicating pipeline connected with an outlet pipe of the heat exchanger, a first heat exchange pipe and a second heat exchange pipe arranged in the heat exchanger, wherein the first heat exchange pipe and the second heat exchange pipe are connected in parallel, a shunt pipe component arranged in the shell comprises a first shunt pipe, a second shunt pipe and a third shunt pipe, one end of the first shunt pipe is connected with one end of the second shunt pipe, one end of the third shunt pipe is communicated with a connecting end, the third shunt pipe at least comprises a matching pipe, the inner diameter of the matching pipe is D, the length of the straight line segment of the matching pipe is at least 5D, the first shunt pipe is communicated with the first heat exchange pipe, the second shunt pipe is communicated with the second heat exchange pipe, the matching pipe is communicated with the communicating pipeline, the shunt pipe component adopts a mode of one way of inlet and two ways of outlet, through the design of increasing the length of the straight line segment of the third shunt pipe, the bias flow or the turbulent flow of the refrigerant is reduced, and the uniform distribution of the distribution pipe assembly is realized.

Description

Air conditioner

Technical Field

The utility model belongs to the technical field of the air conditioner, especially, relate to an air conditioner.

Background

At present, in a common air-conditioning refrigeration system, in order to reduce the flowing resistance of a refrigerant, multi-flow path treatment is carried out on an indoor heat exchanger and an outdoor heat exchanger, namely, a flow divider is adopted at the inlet and the outlet of the heat exchanger.

In the related technology, a common hot press molding tee joint is used for liquid separation, and the state of a refrigerant before entering a heat exchanger is a gas-liquid two-phase state, so that the heat exchanger of the air conditioner is often in a state of uneven refrigerant flow distribution, the utilization efficiency of the heat exchanger is influenced, and the performance of the whole air conditioner is influenced.

In view of this, the present invention is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to foretell technical problem, provide an air conditioner.

In order to achieve the above object, the utility model discloses a technical scheme be:

a housing;

the heat exchanger is arranged in the shell;

the communicating pipeline is communicated with an outlet pipe of the heat exchanger;

a first heat exchange tube provided in the heat exchanger, the first heat exchange tube extending meandering;

the second heat exchange tube is arranged in the heat exchanger, extends in a winding way and is connected with the first heat exchange tube in parallel;

the shunt pipe assembly is arranged in the shell and comprises a first shunt pipe, a second shunt pipe and a third shunt pipe, one end of the first shunt pipe is connected with one end of the second shunt pipe, and one end of the third shunt pipe is communicated with the connecting end;

the third shunt pipe at least comprises a matching pipe, the inner diameter of the matching pipe is marked as D, and the length of a straight line section of the matching pipe is at least 5D;

the first shunt pipe is communicated with the first heat exchange pipe, the second shunt pipe is communicated with the second heat exchange pipe, and the matching pipe is communicated with the communicating pipeline.

Optionally, the third shunt tube further comprises a expansion and contraction tube, one end of the expansion and contraction tube is connected with the matching tube, and the other end of the expansion and contraction tube is connected with the connecting end.

Optionally, the length of the expansion tube is at least 2.5D.

Optionally, the inner diameter of the expandable tube is at least 1.5D.

Optionally, the distance between one side of the expansion and contraction pipe close to the connecting end and the connecting end is at least 4D.

Optionally, the pipe outlet surfaces of the first shunt pipe and the shunt pipe are perpendicular to the installation angle of the communication pipeline.

Optionally, the first shunt pipe, the second shunt pipe and the third shunt pipe are integrally formed.

Optionally, the third shunt pipe at least comprises a straight line segment and an arc segment, the straight line segment is connected to the expansion pipe, and the arc segment is connected with the connecting pipeline.

Optionally, the inner diameter of the straight section is the same as the inner diameter of the matching pipe.

Optionally, the shunt tube assembly is configured as a copper pipe.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

the utility model provides an air conditioner, which comprises a shell, a heat exchanger arranged in the shell, a communicating pipeline connected with an outlet pipe of the heat exchanger, a first heat exchange pipe and a second heat exchange pipe arranged in the heat exchanger, wherein the first heat exchange pipe and the second heat exchange pipe extend in a winding way and are connected in parallel, a shunt pipe component arranged in the shell comprises a first shunt pipe, a second shunt pipe and a third shunt pipe, one end of the first shunt pipe is connected with one end of the second shunt pipe, one end of the third shunt pipe is communicated with a connecting end, the third shunt pipe at least comprises a matching pipe, the inner diameter of the matching pipe is marked as D, the length of the straight line section of the matching pipe is at least 5D, the first shunt pipe is communicated with the first heat exchange pipe, the second shunt pipe is communicated with the second heat exchange pipe, the matching pipe is communicated with the communicating pipeline, the shunt pipe component adopts a mode of feeding and discharging, and by increasing the length of the straight line section of the third shunt pipe, the pressure and the flow velocity of the fluid are reduced, the pressure reduction speed is reduced before the fluid enters the connecting end, the turbulent flow generated under high pressure is effectively buffered, the bias flow of the refrigerant is reduced, uneven distribution is avoided, the uniform distribution of the distribution pipe assembly is realized, and the heat exchange efficiency of the heat exchanger is effectively improved; meanwhile, the structure can be simplified, and the flowing smoothness of the refrigerant is good.

Drawings

Fig. 1 is a schematic view of an air conditioner according to an embodiment of the present disclosure;

fig. 2 is a partial view of an air conditioner according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a shunt tube assembly according to an embodiment of the disclosure;

FIG. 4 is another structural schematic of a shunt tube assembly according to an embodiment of the disclosure;

in the above figures:

a heat exchanger 1; a compressor 2; a throttle member 3; a four-way reversing valve 4;

a communication line 10; a first heat exchange pipe 20;

a second heat exchange pipe 30; an evaporator 11; a condenser 12;

a shunt tube assembly 40; a first shunt pipe 41; a second shunt pipe 42; a third shunt pipe 43;

a dilation tube 431; a mating tube 432; a straight line segment 421; an arcuate segment 422.

Detailed Description

The present invention is further described below in conjunction with specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the scope of the present invention is not limited to the scope described in the detailed description. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used for explaining 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 indicator is changed accordingly.

Furthermore, the descriptions in the present application related to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are implicitly being indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

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 air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator in the present application. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator 13 may achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

Referring to fig. 1-2, the present invention provides an air conditioner, referring to fig. 1, the air conditioner mainly includes a heat exchanger 1, a compressor 2, a throttling component 3 and a four-way reversing valve 4, wherein the heat exchanger can be an evaporator 11 and a condenser 12. The evaporator 11 is a device for outputting cold energy, and has the function of evaporating the refrigerant liquid flowing in through the throttling component 3 to absorb the heat of the cooled object, so as to achieve the purpose of refrigeration; the condenser 12 is a device for outputting heat, and the heat absorbed from the evaporator 11 and the heat converted by the work consumed by the compressor 2 are carried away by a cooling medium in the condenser, so as to achieve the purpose of heating; and the four-way reversing valve 4 is used for switching the refrigerating and heating modes. The evaporator and the condenser are important parts for heat exchange in the air conditioner, and the heat exchange performance of the evaporator and the condenser directly determines the energy efficiency level of the air conditioner.

Under the refrigeration working condition in summer, the indoor heat exchanger is used as an evaporator 11, the outdoor heat exchanger is used as a condenser 12, and low-pressure two-phase refrigerant (a mixture of liquid-phase refrigerant and gas-phase refrigerant) in the evaporator 11 absorbs heat from indoor air to lower the indoor temperature; the gas refrigerant is sucked by the compressor 2 and then compressed into a high-temperature high-pressure gas refrigerant; the high temperature, high pressure gas refrigerant then releases heat energy to the outdoor environment at the condenser 12; finally, the refrigerant is throttled by the throttle member 3, becomes a low-temperature low-pressure two-phase refrigerant, and enters the evaporator 11 again, and the cycle described above is repeated.

When heat is supplied in winter, the air conditioner changes working condition modes through the four-way reversing valve 4, at the moment, the outdoor heat exchanger is used as the evaporator 11, the indoor heat exchanger is used as the condenser 12: the low-pressure two-phase refrigerant (a mixture of liquid-phase refrigerant and gas-phase refrigerant) in the evaporator 11 absorbs heat from the low-temperature environment; the refrigerant is compressed into a high-temperature and high-pressure gas refrigerant after being sucked by the compressor 2; then, the high-temperature and high-pressure gas refrigerant releases heat energy to the indoor environment in the condenser 12, so that the indoor temperature is increased, and the self temperature is reduced; finally, the refrigerant is throttled by the throttle member 3, becomes a low-temperature low-pressure two-phase refrigerant, and enters the evaporator 11 again, and the above cycle is repeated.

The heat exchanger 1 includes a plurality of fins arranged side by side and a plurality of refrigerant tubes arranged on the plurality of fins in a penetrating manner, and the plurality of refrigerant tubes may be in a parallel connection manner.

As shown in fig. 2, the air conditioner further includes a shunt tube assembly 40 communicating with the refrigerant tube of the heat exchanger 1, and the refrigerant is uniformly distributed through the shunt tube assembly 40 into a plurality of heat exchange tubes including at least a first heat exchange tube 20 and a second heat exchange tube 20, wherein the first heat exchange tube 20 is serpentine-extended, the second heat exchange tube 30 is connected in parallel with the first heat exchange tube 20, and the communication pipe 10 communicates with the outlet tube of the heat exchanger 1. Due to the poor performance of the shunt pipe assembly 40, the problem of uneven shunt exists, which causes the flow of some processes of the heat exchanger 1 to be too small, causes the processes to be seriously overheated and wastes the heat exchanger 1; meanwhile, the flow of other flows is large, the evaporation of a refrigerant is insufficient, even the problems of air suction and liquid entrainment, poor minimum refrigerating performance, uneven frosting on the surface of the heat exchanger 1 and the like are caused, and the condensation performance is influenced.

The term "meandering" as used herein means that a pipe extends while being wound along an S-shaped path in which a plurality of stages are connected in series or a U-shaped path in which a plurality of stages are connected in series. The communication pipe 10 may also be a meandering shape, or may have various shapes such as a special shape and a straight shape, and is not limited thereto.

Based on the uneven problem of reposition of redundant personnel of current reposition of redundant personnel pipe assembly 40, the utility model designs a reposition of redundant personnel pipe assembly 40, refer to fig. 3-4, reposition of redundant personnel pipe assembly 40 includes first reposition of redundant personnel 41, second reposition of redundant personnel 42 and third reposition of redundant personnel 43, and the one end of first reposition of redundant personnel 41 and the one end of second reposition of redundant personnel 42 are connected, and the one end and the link intercommunication of third reposition of redundant personnel 43, first reposition of redundant personnel 41 and first heat exchange tube 20 intercommunication, second reposition of redundant personnel 42 and second heat exchange tube 30 intercommunication, third reposition of redundant personnel 43 and intercommunication pipeline 10 intercommunication.

It should be noted that the shunt tube assembly 40 is used for guiding the refrigerant to flow into or flow out of the heat exchanger 1.

Specifically, as shown in fig. 3, the Y-shaped pipe is constructed by the first shunt pipe 41 and the second shunt pipe 42, and compared with the shunt pipe assembly 40 with a complex structure in the prior art, the structure of the shunt pipe assembly 40 can be simplified while the shunt effect can be ensured, the smooth degree of refrigerant flowing can be ensured, the processing efficiency can be improved, and the cost can be reduced. The flow dividing pipe assembly 40 is simple in structure, the number of welding points can be omitted or reduced, the probability of welding blockage is reduced, and the circulation smoothness of a refrigerant is guaranteed.

The utility model discloses an in the embodiment, can realize the reposition of redundant personnel of refrigerant through setting up reposition of redundant personnel subassembly 40, construct Y type pipe through the first reposition of redundant personnel 41 with reposition of redundant personnel subassembly 40 and the second reposition of redundant personnel 42 of reposition of redundant personnel subassembly 40 jointly, can simplify reposition of redundant personnel subassembly 40's structure, guarantee the smooth and easy degree that the refrigerant flows, and can improve machining efficiency, reduce cost. Meanwhile, the shunt tube assembly 40 is simple in structure, the number of welding points can be omitted or reduced, the probability of welding blockage is reduced, and the circulation smoothness of a refrigerant is guaranteed.

In the embodiment of the present invention, the third shunt tube 43 of the shunt tube assembly 40 at least comprises the fitting tube 432, the inner diameter of the fitting tube 432 is recorded as D, and the length of the straight line segment 421 of the fitting tube 432 is at least 5D.

The fitting pipe 432 may be connected to the connection between the communication pipe 10 and the first and second shunt pipes 41 and 42, and by providing the fitting pipe 432, the connection between the shunt pipe assembly 40 and the communication pipe 10 may be facilitated, and the fitting pipe 432 may be inserted into and fitted with other portions of the third shunt pipe 43, or welded to ensure the reliability of the connection therebetween. The shape of the fitting pipe 432 may be set according to the specific shape of the air conditioner, and is not limited herein. The length of the straight line section 421 of the matching pipe 432 is set to be greater than or equal to 5 times the diameter of the matching pipe 432, so that the shunting problem in the prior art can be solved to a certain extent, but the shunting effect can be weakened for a system with a refrigerant pressure of more than 5P.

In order to further solve the reposition of redundant personnel problem of the great system of refrigerant pressure, in some embodiments of the utility model, third reposition of redundant personnel pipe 43 still includes the pipe 431 that expands, expands the one end of tub 431 and connects cooperation pipe 432, expands the other end connection link of tub 431 that contracts.

Specifically, the expansion and contraction pipe 431 is disposed between the matching pipe 432 and the connection end, and may be connected by inserting and fitting or welding to ensure the reliability of the connection therebetween, and referring to fig. 4, a pipe joint and a pipe joint nut may be disposed at one end of the expansion and contraction pipe 431 connected to the connection end to ensure the reliability of the connection.

With the above arrangement, when the fluid passes through the expanding and contracting pipe 431, the pressure and the flow rate of the fluid are reduced, and the pressure reduction speed is reduced between the three branches entering the shunt pipe assembly 40, so that the turbulent flow generated under high pressure is buffered.

In some embodiments of the present invention, the length of the expanding/contracting tube 431 is at least 2.5D. By setting the expanding and contracting pipe 431 to be at least 2.5D, the pressure and the flow velocity of the fluid can be effectively reduced before formal shunting, so that the shunting uniformity is further ensured.

The utility model discloses an in some embodiments, the internal diameter of expansion and contraction pipe 431 is 1.5D at least, so can compromise the reliability of low-cost and heat transfer, is applied to the air conditioning indoor set when heat exchanger 1, and the refrigerant in the position of third shunt 43 can be the gaseous state, can be great with the internal diameter setting of third shunt 43 from this to in the smooth and easy circulation that improves the refrigerant, reduce the resistance of refrigerant circulation, the loss of reduction energy. Meanwhile, the size of the third shunt pipe 43 can be controlled within a reasonable range by the arrangement, so that the cost is low, and the processing is convenient.

In some embodiments of the present invention, the distance between one side of the expanding/contracting tube 431 close to the connecting end and the connecting end is at least 4D. Through setting up the distance of expansion pipe 431 and link, can be effectual with the further buffering of the fluid that steps down through expansion pipe 431, make the fluid can be even distribute to first reposition of redundant personnel 41 and second reposition of redundant personnel 42 to make first heat exchange tube 20 and second heat exchange tube 20 can receive even fluid, in order to carry out heat transfer work.

In some embodiments of the present invention, the first shunt tube 41 and the outlet surface of the shunt tube are perpendicular to the installation angle of the communication pipeline 10. Specifically, the angle of the communicating pipeline 10 is fixed, so that the communicating pipeline and two outlet pipes of the tee joint are vertically arranged, the impact of the refrigerant can be effectively buffered, and the bias flow is prevented.

The outlet surface is a connected cross section of the first shunt tube 41 and the first heat exchange tube 20, and a connected cross section of the second shunt tube 42 and the second heat exchange tube 30.

In some embodiments of the present invention, the first shunt tube 41, the second shunt tube 42 and the third shunt tube 43 are integrally formed. Specifically, the structure of first shunt tubes 41 is the same as the structure of second shunt tubes 42, so that the assembly stability is improved, and the first shunt tubes 41, the second shunt tubes 42 and the third shunt tubes 43 are integrally formed, so that the welding and plugging probability of the shunt tube assemblies 40 is reduced, and the shunt effect is ensured. The third shunt tubes 43 connects the connecting ends of the first shunt tubes 41 and the second shunt tubes 42, so that the refrigerant can flow towards the first shunt tubes 41 and the second shunt tubes 42, the uniformity of the refrigerant of two refrigerant channels can be ensured, and the processing can be facilitated.

The utility model discloses a Y type pipe + expand and contract pipe 431+ cooperation pipe 432 design tee bend pipeline as an organic whole, can save the cost effectively, and the accuracy of pipeline can be guaranteed in the design of integration, has the cushioning effect to turbulent flow, bias flow etc. that the high-speed impact of refrigerant, pipeline bend and cause, can improve the homogeneity of reposition of redundant personnel.

In some embodiments of the present invention, the third shunt tube 43 further comprises a straight line segment 421 and an arc segment 422, the straight line segment 421 is connected to the expansion and contraction tube 431, and the arc segment 422 is connected to the connection pipeline. Specifically, the straight line segment 421 is inserted into the expanding and contracting pipe 431 or welded with the expanding and contracting pipe 431, so as to realize the stable connection between the connection pipeline and the third shunt pipe 43.

In some embodiments of the present invention, the inner diameter of the straight line section 421 is the same as the inner diameter of the matching pipe 432, so as to reduce the production cost and stabilize the flow rate and flow rate of the fluid to some extent.

In some embodiments of the present invention, the first shunt tube 41 and the second shunt tube 42 are provided with an annular protrusion on one side close to the connecting end, and the annular protrusion extends along the circumferential direction of the first shunt tube 41 and the second shunt tube 42 respectively. The annular protrusion may improve structural reliability of the first/second shunt tubes 41/42, and the first/second heat exchange tubes 20/20 may be stopped against the annular protrusion to improve reliability of installation of the first and second heat exchange tubes 20/41/20 and 42.

In some embodiments of the present invention, the shunt tube assembly 40 is provided as a copper tube. Copper structure intensity is good, corrosion resistance is good, and the shunt tubes cost is lower compared in red copper and brass, and in the pipeline design, relatively easy and other part cooperations are easily used by a large amount in air conditioning system.

The utility model discloses in, through angle, the size and the mounted position of the pipe 431 that expands and contracts of adjustment inlet line, can reduce the high-speed buffer of refrigerant, alleviate turbulent flow, the bias flow that the pipeline bent and caused, effectively improve the homogeneity of reposition of redundant personnel. Meanwhile, the flow dividing effect of the flow dividing pipe assembly 40 of the present invention is subjected to software simulation and actual verification, the flow through the first flow dividing pipe 41 and the second flow dividing pipe 42 of the flow dividing pipe assembly 40 is uniform, the temperature and the pressure are close, and the problems caused by uneven flow dividing are effectively solved, for example, the flow is too small, which causes the flow to be seriously overheated and the heat exchanger 1 to be wasted; the flow is large, the evaporation of the refrigerant is insufficient, even the problems of air suction, liquid entrainment, bad minimum refrigerating performance, uneven frosting on the surface of the heat exchanger 1 and the like are caused, and the condensation performance is influenced.

According to the utility model discloses air conditioner, above-mentioned heat exchanger 1 can be applied to the air conditioning indoor set and also can be applied to the air condensing units, according to the utility model discloses an air conditioner through setting up heat exchanger 1, can simplify the structure, and the smooth and easy degree of flow of refrigerant is good, can improve heat transfer effect.

Other constructions of the heat exchanger 1 according to the embodiments of the present invention, such as fins, etc., and the operation thereof, are known to those of ordinary skill in the art and will not be described in detail herein.

Based on the above, the present invention provides an air conditioner, which comprises a housing, a heat exchanger 1 disposed in the housing, a communicating pipeline 10 connected to an outlet pipe of the heat exchanger 1, a first heat exchanging pipe 20 and a second heat exchanging pipe 20 disposed in the heat exchanger 1, the first heat exchanging pipe 20 and the second heat exchanging pipe 20 extending in a meandering manner and connected in parallel, a shunt pipe assembly 40 disposed in the housing, the shunt pipe assembly 40 comprising a first shunt pipe 41, a second shunt pipe 42 and a third shunt pipe 43, one end of the first shunt pipe 41 being connected to one end of the second shunt pipe 42, one end of the third shunt pipe 43 being communicated with the connecting end, the third shunt pipe 43 at least comprising a matching pipe 432, the inner diameter of the matching pipe 432 being marked as D, the length of a straight line segment 421 of the matching pipe 432 being at least 5D, the first shunt pipe 41 being communicated with the first heat exchanging pipe 20, the second shunt pipe 42 being communicated with the second heat exchanging pipe 20, the matching pipe 432 being communicated with the communicating pipeline 10, the shunt tube assembly 40 adopts a mode of one path and two paths, and the design of increasing the length of the straight line segment 421 of the third shunt tube 43 reduces the bias flow or turbulent flow of the refrigerant, avoids uneven shunt, and realizes even shunt of the shunt tube assembly 40.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. An air conditioner, characterized by comprising:

a housing;

the heat exchanger is arranged in the shell;

the communication pipeline is communicated with an outlet pipe of the heat exchanger;

the first heat exchange tube is arranged in the heat exchanger;

the second heat exchange tube is arranged in the heat exchanger and is connected with the first heat exchange tube in parallel;

the shunt tube assembly is arranged in the shell and comprises a first shunt tube, a second shunt tube and a third shunt tube, one end of the first shunt tube is connected with one end of the second shunt tube, and one end of the third shunt tube is communicated with the connecting end;

the third shunt pipe at least comprises a matching pipe, the inner diameter of the matching pipe is D, and the length of a straight line section of the matching pipe is at least 5D;

the first shunt pipe is communicated with the first heat exchange pipe, the second shunt pipe is communicated with the second heat exchange pipe, and the matching pipe is communicated with the communicating pipeline.

2. The air conditioner of claim 1, wherein the third shunt pipe further comprises a diverging pipe, one end of the diverging pipe is connected to the matching pipe, and the other end of the diverging pipe is connected to the connecting end.

3. The air conditioner of claim 2, wherein the length of the expansion and contraction tube is at least 2.5D.

4. The air conditioner of claim 2, wherein the inner diameter of the expanded pipe is at least 1.5D.

5. The air conditioner of claim 2, wherein a side of the expansion pipe adjacent to the connection end is at least 4D from the connection end.

6. The air conditioner according to claim 1, wherein the first shunt pipe and the outlet surface of the shunt pipe are perpendicular to the installation angle of the communication pipe.

7. The air conditioner of claim 1, wherein the first shunt pipe, the second shunt pipe, and the third shunt pipe are integrally formed.

8. The air conditioner of claim 2, wherein the third shunt pipe comprises at least a straight section and an arc section, the straight section is connected to the expansion pipe, and the arc section is connected to the communication pipeline.

9. The air conditioner according to claim 8, wherein an inner diameter of the straight line section is the same as an inner diameter of the fitting pipe.

10. The air conditioner of claim 1, wherein the manifold assembly is provided as a copper pipe.

Images