CN219955730U - Collecting pipe, heat exchanger and air conditioner - Google Patents

Abstract

The utility model discloses a collecting pipe, which is internally provided with a liquid collecting cavity, wherein the liquid collecting cavity is used for circulating a refrigerant, the collecting pipe is provided with a first end and a second end which are far away from each other, and the refrigerant flows from the first end to the second end; the aperture of the liquid collecting cavity gradually increases from the first end to the second end so as to improve the flow speed of the refrigerant. The collecting pipe can improve the flow speed of the refrigerant from the first end to the second end, thereby improving the heat exchange efficiency of the refrigerant.

Description

Collecting pipe, heat exchanger and air conditioner

Technical Field

The utility model relates to the technical field of heat exchange, in particular to a collecting pipe, a heat exchanger and an air conditioner.

Background

The application of current microchannel heat exchanger in the air conditioner refrigeration field is more extensive, the microchannel heat exchanger mainly includes pressure manifold and flat pipe two parts, when the pressure manifold is vertical to be set up, when refrigerant flows in the pressure manifold, because there is gravity influence, and the liquid collecting cavity of pressure manifold is the cylinder, therefore refrigerant pile up at the lower extreme in the liquid collecting cavity of cylinder structure at first when refrigerant is carried by the lower extreme to the upper end, just can be to upper end diffuse after the lower extreme is full of refrigerant, refrigerant flow process is more difficult, the efficiency that the upper end of refrigerant flowed has been influenced, make the refrigerant get into the volume of flat pipe inhomogeneous, just also influenced the heat transfer performance of heat exchanger, thereby the heat exchange efficiency of heat exchanger has been reduced.

Disclosure of Invention

In order to overcome the defects in the prior art, one of the purposes of the utility model is to provide a collecting pipe which can improve the flow speed of the refrigerant from the first end to the second end, thereby improving the heat exchange efficiency of the refrigerant.

The second object of the present utility model is to provide a heat exchanger, in which the heat exchange efficiency is improved after the header pipe is adopted.

It is a third object of the present utility model to provide an air conditioner, in which the heat exchange efficiency is improved after the heat exchanger is adopted.

One of the purposes of the utility model is realized by adopting the following technical scheme:

a collecting pipe is internally provided with a liquid collecting cavity which is used for circulating a refrigerant, and the collecting pipe is provided with a first end and a second end which are mutually far away, and the refrigerant flows from the first end to the second end; the aperture of the liquid collecting cavity gradually increases from the first end to the second end so as to improve the flowing speed of the refrigerant.

Further, a plurality of diversion baffles are arranged in the collecting pipe, and the diversion baffles are distributed at intervals along the axial direction of the collecting pipe so as to divert the refrigerant.

Further, one end of the flow dividing baffle is a connecting part which is fixedly connected with the collecting pipe; the other end of the diversion baffle plate and the inner wall of the liquid collecting cavity are separated to form a refrigerant passage opening.

Further, the connecting part is of an arc structure which is adapted to the inner wall of the liquid collecting cavity.

Further, the split baffle is provided with a through hole for the refrigerant to pass through.

Further, the through holes are square holes.

Further, the projections of the plurality of split baffles in the axial direction of the header pipe do not overlap entirely.

The second purpose of the utility model is realized by adopting the following technical scheme:

a heat exchanger includes at least one collector tube group and a plurality of flat tubes; each collector tube group comprises a liquid inlet tube and a liquid outlet tube, the flat tubes extend along a first direction, and a plurality of flat tubes are arranged at intervals along a second direction; a plurality of refrigerant channels extending along a first direction are arranged in the flat tube, one end of the flat tube is connected with a liquid inlet tube, and the other end of the flat tube is connected with a liquid outlet tube; the refrigerant channel is communicated with the inside of the liquid inlet pipe and the liquid outlet pipe; the liquid inlet pipe is the collecting pipe.

Further, a diversion area is formed between two adjacent flat pipes in the liquid collecting cavity, and at least one diversion baffle is arranged in the diversion area.

The third purpose of the utility model is realized by adopting the following technical scheme:

an air conditioner comprises the heat exchanger.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the collecting pipe, the aperture of the liquid collecting cavity is designed to be reduced from the second end to the first end, so that the flow rate of the refrigerant flowing from the first end to the second end is improved, namely the flow rate of the refrigerant in the collecting pipe is improved, and the heat exchange efficiency of the refrigerant is improved.

2. The heat exchanger can improve the heat exchange effect of the refrigerant and the flat tube by adopting the collecting pipe as the liquid inlet pipe, thereby improving the heat exchange efficiency of the heat exchanger.

3. The air conditioner of the utility model applies the heat exchanger to the heat exchange system of the air conditioner, and can optimize the heat exchange effect of the air conditioner and improve the heat exchange efficiency.

Drawings

FIG. 1 is a schematic view of the internal structure of a header of the present utility model;

fig. 2 is a schematic structural view of the heat exchanger of the present utility model.

In the figure:

1. collecting pipes; 11. a first end; 12. a second end; 10. a liquid collection cavity; 101. a split area;

2. a shunt baffle; 20. a through hole; 21. a connection part;

3. a flat tube; 30. and a refrigerant passage.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and detailed description below:

in the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

When the collecting pipe of the existing cylindrical liquid collecting cavity structure is vertically arranged and used, the refrigerant spreads from the lower end to the upper end, the lower end of the collecting pipe is fully filled with the refrigerant before the refrigerant is conveyed from the lower end to the upper end due to the gravity influence of the refrigerant, the refrigerant spreads from the upper end after the refrigerant is fully filled with the lower end of the collecting pipe, but the collecting pipe is communicated with the flat pipe when in use, so that the flat pipe communicated with the lower end of the collecting pipe can be further divided into the refrigerant partially deposited at the lower end of the collecting pipe, the spreading speed of the refrigerant from the lower end to the upper end is slower, and the integral heat exchange efficiency of the flat pipe is seriously influenced.

In view of this, as shown in fig. 1 and 2, the present utility model provides a header 1, in which a liquid collecting chamber 10 is provided in the header 1, the liquid collecting chamber 10 is capable of flowing a refrigerant, the header 1 has a first end 11 and a second end 12 which are distant from each other, and the refrigerant flows from the first end 11 to the first end 12 when the refrigerant flows. Specifically, the aperture of the liquid collecting cavity 10 gradually increases from the first end 11 to the second end 12 to increase the flow rate of the refrigerant.

Based on the above structure, when the refrigerant flows from the first end 11 to the second end 12, since the aperture of the first end 11 is smaller than that of the second end 12, the first end 1110 of the liquid collecting chamber is quickly filled with the refrigerant, so that the flow speed of the refrigerant flowing from the first end 11 to the second end 12 along the inner wall of the liquid collecting chamber 10 is improved,

in this embodiment, the aperture of the liquid collecting cavity 10 is reduced from the second end 12 to the first end 11, so that the flow rate of the refrigerant flowing from the first end 11 to the second end 12 is increased, that is, the flow efficiency of the refrigerant in the collecting pipe 1 is improved, that is, the heat exchange efficiency of the refrigerant is improved.

In this embodiment, the liquid collecting cavity 10 may have a conical shape or a pyramid shape, which can realize the circulation of the refrigerant, as long as the pore diameters at both ends thereof are changed from small to large or from large to small.

It should be noted that the refrigerant is a refrigerant, and specifically includes a gas-liquid two-phase refrigerant, a gas-phase refrigerant and a liquid-phase refrigerant, so that in the process of flowing the refrigerant, the layering phenomenon of the gas-liquid two-phase refrigerant is obvious, which leads to uneven refrigerant distribution and affects the heat exchange efficiency of the refrigerant.

In this regard, in some embodiments, a plurality of flow dividing baffles 2 are further provided in the liquid collecting chamber 10 of the header 1, and the plurality of flow dividing baffles 2 are spaced apart in the axial direction of the header 1 to divide the refrigerant.

After the refrigerant is input into the collecting pipe 1, the refrigerant flows from the first end 11 to the second end 12 of the liquid collecting cavity 10, the refrigerant is blocked by the flow dividing baffles 2 to start to divide in the flowing process, multiple strands of the refrigerants are mutually intersected and converged in the dividing process under the blocking effect of the multiple flow dividing baffles 2, when the refrigerant in the liquid collecting cavity 10 reaches a flow balance state, as the refrigerant flows out of the liquid collecting cavity 10, new refrigerant flows into the liquid collecting cavity 10, at the moment, liquid-phase refrigerant flows downwards in the axial direction under the action of gravity, and the flow dividing baffles 2 block the liquid-phase refrigerant, so that convection is formed, and after multiple circulation flow dividing and converging, the gas phase and the liquid phase of the refrigerant are fully mixed.

In this embodiment, by adding the plurality of diversion baffles 2 in the liquid collecting cavity 10, the refrigerant with two phases of gas and liquid is fully mixed in the flowing process, so that the heat exchange efficiency of the refrigerant after flowing out of the collecting pipe 1 is improved.

It will be appreciated that the flow dividing baffle 2 is mounted in the header 1, and that the flow dividing baffle 2 has a connecting portion 21 for this purpose, and that the flow dividing baffle 2 is not abutted everywhere against the inner wall of the liquid collecting chamber 10, but is provided with a refrigerant passage port for allowing the refrigerant to circulate.

In some embodiments, one end of the diversion baffle 2 is a connecting portion 21, and the connecting portion 21 is fixedly connected with the collecting pipe 1. The diversion baffle 2 and the collecting pipe 1 are fixedly connected through the connecting part 21 in a welding or inserting way. The other end of the diversion baffle 2 and the inner wall of the liquid collecting cavity 10 are separated to form a refrigerant passage port through which the refrigerant can circulate.

In this embodiment, as shown in fig. 1, the liquid collecting chamber 10 may have a conical overall shape, and the connection portion 21 may have a circular arc structure adapted to the liquid collecting chamber 10 in order to fixedly connect the liquid collecting chamber 10 to the liquid distributing baffle 2, or may have a hemispherical shape with a groove structure in other embodiments, as long as the refrigerant can be deposited.

In addition, since the refrigerant circulates in the axial direction of the liquid collecting chamber 10, the plate-shaped flow dividing baffle 2 is mounted in such a state that the plane thereof is perpendicular to the axis of the header 1, which is more convenient for blocking the refrigerant on the plate-shaped plane than the flow dividing baffle 2 is disposed in parallel with the axis of the header 1, thereby better disturbing the flow of the refrigerant.

Further, in order to improve the flow dividing effect of the refrigerant, the flow dividing baffle 2 may be provided with a through hole 20 through which the liquid-phase refrigerant can pass, so that the refrigerant flowing in the liquid-collecting cavity 10 can circulate in the through hole 20 in addition to the refrigerant passage, thereby increasing the flow dividing number of the refrigerant and improving the mixing times of the flow dividing refrigerant, so that the refrigerant is mixed more fully.

More specifically, as shown in fig. 1, the split baffle plate 2 has a fan shape, one end of the fan shape is used as a connecting portion 21 and is fixedly connected with the inner wall of the liquid collecting cavity 10, and the other end of the fan shape has a straight line shape, so that the straight line and the inner wall of the liquid collecting cavity 10 are separated to form a refrigerant passage opening. In order to allow a portion of the refrigerant to be smoothly branched from the through hole 20, the through hole 20 may be opened on the central axis of the liquid collecting chamber 10. In some embodiments, the through holes 20 may be square holes, the refrigerant flowing area formed by the through holes 20 is a first area, and the refrigerant flowing area formed by the refrigerant passage openings is a second area, so that when the refrigerant circulates in the collecting pipe 1, a part of the gas-liquid two-phase refrigerant flows in the first area, and the other part of the refrigerant enters the second area, and the division of the first area and the second area can avoid the occurrence of a flowing dead zone when the refrigerant is blocked by the split baffle 2, so that the disturbance of the gas-liquid two-phase refrigerant is quickened, the uniformity of the mixing of the gas-liquid two-phase refrigerant is improved, and the heat exchange effect of the refrigerant is better.

It should be noted that, the shape, size and number of the through holes in this embodiment are not limited, and may be designed reasonably according to the flow requirement of the refrigerant.

In addition, since the plurality of flow dividing baffles 2 are distributed at intervals in the axial direction of the liquid collecting cavity 10, if the flow dividing baffles 2 are all disposed on the same side of the liquid collecting cavity 10, under the blocking effect of the flow dividing baffles 2 at two ends, the situation that some flow dividing baffles 2 in the middle cannot receive flowing refrigerant will occur, so that the flow dividing effect is bad, and even the flow of the refrigerant capable of flowing through the refrigerant in the liquid collecting cavity 10 is reduced, and the heat exchange efficiency is further affected.

Specifically, the distribution of the split baffles 2 on the inner wall of the liquid collecting cavity 10 may be that two split baffles 2 may be disposed at the same height, and the two split baffles 2 are disposed on two opposite sides of the liquid collecting cavity 10, and the two split baffles 2 are disposed on two opposite sides of the inner wall of the liquid collecting cavity 10 in other directions by the same arrangement method on other layers.

On the basis of the structure, when the refrigerant circulates in the liquid collecting cavity 10, the flow dividing baffles 2 arranged at different positions in the circumferential direction of the liquid collecting cavity 10 disturb and divide the refrigerant, so that the refrigerant flows out in a plurality of radial directions of the liquid collecting cavity 10, and is converged again in the axial direction when the refrigerant is continuously input from the first end 11, thereby the gas-liquid two-phase refrigerant is fully mixed, layering phenomenon of the gas-liquid two-phase refrigerant can be effectively prevented, uniformity of the refrigerant in distribution is improved, and heat exchange effect of the refrigerant is guaranteed.

As shown in fig. 2, in order to better illustrate the use process of the collecting pipe 1, the utility model also provides a heat exchanger, which comprises at least one collecting pipe group and a plurality of flat pipes 3, wherein a plurality of refrigerant channels extending along a first direction (X direction shown in fig. 2) are arranged in the flat pipes 3. Each collector tube group comprises a liquid inlet tube and a liquid outlet tube, the flat tubes 3 extend along a first direction, a plurality of flat tubes 3 are distributed at intervals along a second direction (Y direction shown in fig. 2), when the flat tubes 3 are connected with the collector tube group, one ends of the flat tubes 3 are connected with the liquid inlet tubes, the other ends of the flat tubes 3 are connected with the liquid outlet tubes, and refrigerant channels 30 of the flat tubes 3 can be communicated with the liquid inlet tubes and the inner cavities of the liquid outlet tubes, specifically, the liquid inlet tubes are the collecting tubes 1.

It should be noted that, since the heat exchanger is provided with at least one liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is used for conveying the refrigerant from the liquid collecting cavity 10 to the refrigerant channel 30 of the flat pipe 3, and the liquid outlet pipe is used for receiving the refrigerant after heat exchange with the flat pipe 3 in the refrigerant channel 30, if the heat exchange efficiency of the heat exchanger is to be improved, the speed of the refrigerant flowing into the flat pipe 3 from the liquid inlet pipe can be improved by improving the flow speed of the refrigerant in the height direction of the liquid collecting cavity 10, specifically, the heat exchange efficiency of the heat exchanger can be improved by adopting the collecting pipe 1 with the structure for at least one liquid inlet pipe, however, if the heat exchanger comprises a plurality of collecting pipe groups, the liquid inlet pipe in the plurality of collecting pipe groups adopts the collecting pipe 1 with the structure, the heat exchange efficiency of the heat exchanger is higher, and the liquid outlet pipe is not required to be selected, so long as the liquid flowing from the flat pipe 3 can be smoothly in an equilibrium state after the refrigerant flows from the liquid inlet pipe.

Thus, when the heat exchanger works, the refrigerant enters the liquid collecting cavity 10 from the first end 11 of the collecting pipe 1, and compared with the liquid collecting cavity with the same pore diameters at the two ends in the prior art, the pore diameters from the first end 11 to the second end 12 of the liquid collecting cavity 10 of the embodiment gradually become larger, so that the refrigerant at the first end 11 in the liquid collecting cavity 10 quickly climbs in the axial direction of the collecting pipe 1 and enters the refrigerant channel 30 of the flat pipe 3, the time that the refrigerant contacts with the flat pipe 3 and exchanges heat is shortened, and the heat exchange efficiency of the heat exchanger is improved.

It can be understood that, considering that the above-mentioned flow dividing baffle plate 2 is provided inside the flow collecting pipe 1, and the flat pipe 3 is combined with the flow collecting pipe 1, please refer to fig. 1 and 2 together, one end of the flat pipe 3 needs to avoid the position provided with the flow dividing baffle plate 2 when fixedly connected with the flow collecting pipe 1, so as to avoid the flow dividing baffle plate 2 from obstructing the refrigerant flowing into the refrigerant channel 30.

On the basis of the above structure, a flow dividing area 101 is formed between two adjacent flat tubes 3 in the axial direction of the liquid collecting cavity 10, and because the refrigerant in the liquid collecting cavity 10 is in a circulation state, in order to avoid that after the flat tubes 3 close to the first end 11 in the flow dividing area 101 divide the refrigerant, the new refrigerant is input to cause the refrigerant to flow into the flat tubes 3 close to the second end 12 in a gas-liquid two-phase state, so that the heat exchanging effect of the heat exchanger is affected, and in order to uniformly mix the gas-liquid two-phase refrigerant, at least one flow dividing baffle 2 is arranged in the flow dividing area 101.

In this way, after the refrigerant is split and flows into the refrigerant channels 30 of the flat tubes 3 near the first end 11 in the splitting area 101, as new refrigerant is input into the liquid collecting cavity 10, the remaining refrigerant and the new refrigerant can be split continuously under the blocking of the splitting baffle 2 of the splitting area 101 and are converged again in circulation, so that the refrigerant is fully mixed, the refrigerant in the refrigerant channels 30 in each flat tube 3 is ensured to be uniformly distributed, and the heat exchanger achieves a better heat exchange effect.

It should be noted that, the number and arrangement of the diversion baffles 2 in each diversion area 101 can affect the mixing effect of the refrigerant, so that the design can be reasonably designed according to the actual situation.

The utility model also provides an air conditioner, which is applied to the heat exchange system of the air conditioner, and can optimize the heat exchange effect of the air conditioner and improve the heat exchange efficiency.

It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.

Claims (10)

1. The collecting pipe is characterized in that a liquid collecting cavity is arranged in the collecting pipe and used for circulating a refrigerant, the collecting pipe is provided with a first end and a second end which are far away from each other, and the refrigerant flows from the first end to the second end; the aperture of the liquid collecting cavity gradually increases from the first end to the second end so as to improve the flow speed of the refrigerant.

2. The header according to claim 1, wherein a plurality of flow dividing baffles are provided inside said header, and a plurality of said flow dividing baffles are spaced apart along an axial direction of said header to divide said refrigerant.

3. The collecting pipe according to claim 2, wherein one end of the diversion baffle is a connecting part, and the connecting part is fixedly connected with the collecting pipe; the other end of the diversion baffle plate and the inner wall of the liquid collecting cavity are separated to form a refrigerant passage opening.

4. A header according to claim 3 wherein said connecting portion is of arcuate configuration adapted to the inner wall of said plenum.

5. The header according to claim 2, wherein said split baffle has a through hole for said refrigerant to pass therethrough.

6. The header according to claim 5, wherein said through holes are square holes.

7. The header according to claim 2, wherein projections of a plurality of said flow dividing baffles in an axial direction of said header do not completely overlap.

8. A heat exchanger comprising at least one collector tube group and a plurality of flat tubes; each collector tube group comprises a liquid inlet tube and a liquid outlet tube, the flat tubes extend along a first direction, and a plurality of flat tubes are arranged at intervals along a second direction; a plurality of refrigerant channels extending along a first direction are arranged in the flat tube, one end of the flat tube is connected with the liquid inlet tube, and the other end of the flat tube is connected with the liquid outlet tube; the refrigerant channel is communicated with the inside of the liquid inlet pipe and the liquid outlet pipe; the liquid inlet pipe is a collecting pipe according to any one of claims 2-7.

9. The heat exchanger of claim 8, wherein a flow dividing region is formed between two adjacent flat tubes in the liquid collecting cavity, and at least one flow dividing baffle is disposed in the flow dividing region.

10. An air conditioner comprising the heat exchanger of any one of claims 8 to 9.