CN220398288U - Flat pipe, flat pipe group, heat exchanger and air conditioner - Google Patents

Abstract

The utility model discloses a flat tube, which comprises a plurality of first flat tube sections and a plurality of second flat tube sections, wherein the first flat tube sections are straight tube sections, the second flat tube sections are arc sections, and two adjacent first flat tube sections are connected by a plurality of second flat tube sections; the circular arc section is used for accommodating straight pipe sections or circular arc sections of adjacent flat pipes. A heat exchanger comprises a plurality of flat tube groups, wherein the plurality of flat tube groups are distributed in a third direction. The flat tube is bent for a plurality of times to form a plurality of circular arc sections, so that the heat exchange area of the flat tube can be increased; the flat tubes are distributed to form a flat tube group, two adjacent flat tubes along the third direction are mutually embedded, so that the heat exchange surfaces of the flat tubes are accumulated to form a larger heat exchange surface area, the heat exchange efficiency of the heat exchanger and air can be enhanced, and further the use of fins in the heat exchanger is canceled.

Description

Flat pipe, flat pipe group, heat exchanger and air conditioner

Technical Field

The utility model relates to the field of heat exchange equipment, in particular to a flat tube, a flat tube group, a heat exchanger and an air conditioner.

Background

In the prior art, the heat exchange of the air conditioner is based on the principle that a large amount of heat is required to be absorbed when a low-temperature low-pressure liquid refrigerant is evaporated, and the aim of cooling and dehumidifying is achieved by taking away the heat in the air around the air conditioner. The common air conditioner heat exchanger such as a flat tube fin type heat exchanger consists of a flat tube, fins and a liquid collecting cavity, wherein the heat exchange efficiency of the heat exchanger is mainly related to the fins, and the heat exchange surface area of the heat exchanger is increased by adding the fins with high heat conductivity on the surface, so that the high heat exchange efficiency is realized.

At present, a micro-channel heat exchanger uses a brazing mode to tightly connect a flat tube and a fin, and as brazing filler metal is adhered to the fin in the existing processing scheme, brazing flux still remains on the fin after processing is finished, so that the surface is rough, and the brazing filler metal is easy to become a condensation nucleus during frosting. When the heat pump type air conditioning system heats in winter, the heat exchanger of the outdoor unit is used as an evaporator, and residual brazing flux absorbs water to influence fin drainage, so that the heat pump type air conditioning system heats frosting and icing are accelerated, the heating effect is poor, and the user experience is influenced.

Accordingly, there is a need for a flat tube, a flat tube bank, a heat exchanger and an air conditioner that overcome the above-mentioned drawbacks.

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 flat tube, which is formed into an arc section by bending part of the flat tube main body, so that the flat tube has a larger heat exchange area.

The second object of the present utility model is to provide a flat tube set, which is formed by bending the flat tube several times to form several arc sections, so as to increase the heat exchange area between the flat tube set and the air.

The third object of the utility model is to provide a heat exchanger, which increases the heat exchange area of the flat tube by bending the flat tube in the flat tube group to form an arc section; the plurality of flat tubes are densely distributed, so that the heat exchange area of the flat tube groups and air is increased, the use of fins is further eliminated, and the frosting of condensed water on the surfaces of the fins is avoided.

The fourth object of the utility model is to provide an air conditioner, which increases the heat exchange area of the flat tube by bending the flat tube of the heat exchanger to form an arc section; and the flat pipes are densely distributed, so that the heat exchange area of the heat exchanger and the air is increased, and the heat exchange efficiency of the heat exchanger is improved.

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

the flat pipe comprises a plurality of first flat pipe sections and a plurality of second flat pipe sections, wherein the first flat pipe sections are straight pipe sections, the second flat pipe sections are circular arc sections, and two adjacent first flat pipe sections are connected through a plurality of second flat pipe sections; the circular arc section is used for accommodating straight pipe sections or circular arc sections of adjacent flat pipes.

Further, the circular arc section is provided with openings, and two adjacent openings in the flat tube face the same direction.

Further, the circular arc section is provided with openings, and two adjacent openings in the flat tube face opposite directions.

Further, the flat tube is treated with a softening process and is in a flexible state.

Further, the flat tube is provided with a radiating surface, and the radiating surface is a non-flat surface.

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

the flat tube group comprises a plurality of the flat tubes, wherein the flat tubes are distributed at intervals in a first direction, and the flat tubes are distributed at intervals in a second direction to form the flat tube group; two adjacent arc sections in the third direction in the flat tube group are mutually embedded.

The utility model provides a flat nest of tubes, includes a plurality of first flat pipe and a plurality of second flat pipe, first flat pipe is foretell flat pipe, the second flat pipe is the straight tube, the second flat pipe wears to locate in the first flat pipe, the second flat pipe wears to locate the part gomphosis of circular arc section is in the circular arc section.

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

a heat exchanger comprises a plurality of flat tube groups, and the flat tube groups are distributed in a third direction.

Further, orthographic projections of two adjacent flat tubes in the adjacent two flat tube groups in the third direction are perpendicular to each other.

The fourth technical scheme adopted by the utility model is as follows:

an air conditioner comprises the heat exchanger.

Compared with the prior art, the utility model has the beneficial effects that: the flat tube is provided with a plurality of circular arc sections, so that the flat tube has a larger heat exchange area; and a plurality of flat tube groups are mutually embedded to realize assembly, so that the space occupied by the flat tube groups can be reduced, the flat tubes can be densely distributed, the heat exchange area of the heat exchanger and air is increased, further, the use of fins in the heat exchanger is canceled, and the phenomenon that condensed water frosts on the surfaces of the fins and influences the heat exchange effect is avoided.

Drawings

FIG. 1 is a schematic view of a flat tube according to the present utility model;

FIG. 2 is a schematic view of another flat tube structure according to the present utility model;

FIG. 3 is a schematic view of a flat tube set according to the present utility model;

FIG. 4 is a schematic view showing the arrangement of a plurality of flat tube groups in a third direction in the present utility model;

FIG. 5 is a schematic view of the assembly of a plurality of flat tube sets according to the present utility model;

FIG. 6 is a top view of FIG. 5;

fig. 7 is a front view of fig. 5.

In the figure: 1. a flat tube group; 11. a flat tube; 113. a straight pipe section; 114. a circular arc section; 115. an opening; 12. 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.

Referring to fig. 1 and 2, the present utility model discloses a flat tube 11, which includes a plurality of first flat tube sections and a plurality of second flat tube sections, wherein the first flat tube sections are straight tube sections 113, the second flat tube sections are circular arc sections 114, and the circular arc sections 114 are used for accommodating the straight tube sections 113 or the circular arc sections 114 of adjacent flat tubes 11. The straight pipe sections 113 and the circular arc sections 114 are joined along a direction to form the flat pipe 11, and two adjacent first flat pipe sections are joined by a plurality of second flat pipe sections.

Based on this structure, the first flat tube section and the second flat tube section may be formed on the flat tube 11, specifically, the flat tube 11 may be first extended along a straight line direction, then different portions of the flat tube 11 are bent to form an arc section 114, and the portion of the flat tube 11 that is not bent forms a straight tube section 113. In addition, the first flat tube section and the second flat tube section may be two separate components correspondingly joined to form the flat tube 11.

The circular arc segment 114 may be formed by bending the side portion of the flat tube 11 in the extending direction multiple times, or may be formed by bending the flat tube 11 in a rotating manner around the extending direction. The circular arc section 114 is used for accommodating the straight pipe sections 113 or the circular arc sections 114 in the adjacent flat pipes 11, so that a plurality of flat pipes 11 are mutually embedded and installed, and the flat pipes 11 are closely distributed.

The flat tube 11 is provided with a refrigerant channel 12 for refrigerant to flow therein, and the refrigerant channel 12 penetrates through two ends of the flat tube 11 along the extending direction of the flat tube 11. The refrigerant passage 12 is filled with a low-temperature low-pressure liquid refrigerant, and when the refrigerant flows in the refrigerant passage 12, the refrigerant exchanges heat with the surrounding air through the outer surface of the flat tube 11.

In the prior art, the surface of the flat tube 11 increases the heat exchange surface area of the flat tube 11 and air by adding fins with stronger heat conductivity, so that the rapid heat exchange between the refrigerant and the air is realized. When the flat tube 11 and the fins are assembled, the existing processing scheme is that brazing filler metal is firstly attached to the fins, then the flat tube 11 and the fins are welded together through the brazing filler metal, but brazing filler metal can remain on the processed fins, and the heat exchange surface of the fins is rough.

When the low-temperature low-pressure liquid refrigerant in the refrigerant channel 12 evaporates, the air around the flat tube 11 is easily evaporated by the refrigerant to take away heat, so that water drops are condensed and formed and attached to the heat exchange surface. And because the surface of the fin is rough, water drops are easy to accumulate on the fin, and the water drops are easy to become condensation nuclei during frosting, so that the heat exchange efficiency of the flat tube 11 is affected.

In the present utility model, therefore, a plurality of arc segments 114 are formed by bending the flat tube 11 a plurality of times; because the flat tube 11 is shortened in the length direction after being bent for many times, more straight tube sections 113 and circular arc sections 114 can be additionally arranged in the original length range of the flat tube 11, so that the whole length of the flat tube 11 is prolonged; the whole length of the refrigerant channel 12 is further prolonged in the flat tube 11, the flow path of the refrigerant is increased, and the refrigerant is ensured to fully exchange heat with the flat tube 11; the area of the heat exchange surface is increased outside the flat tube 11, so that the refrigerant can exchange heat with the air by having a larger heat dissipation area.

In addition, the flat tube 11 is bent to form the circular arc section 114, so that the heat exchange efficiency of the refrigerant and the air can be ensured, the use of fins is eliminated, the heat exchange is directly performed through the outer surface of the flat tube 11, and the problem that the heat exchange efficiency of the heat exchanger is reduced due to frosting of condensed water on the fins can be prevented. The flat tube 11 has a simple structure and good heat exchange efficiency.

In the case of example 1,

referring to fig. 1, in the present embodiment, the flat tube 11 has a plurality of arc segments 114, the arc segments 114 have openings 115, the flat tube 11 has a plurality of openings 115, and two adjacent openings 115 on the flat tube 11 face the same direction; wherein the opening 115 is adapted to receive a straight tube segment 113 or a circular arc segment 114 of the other flat tube 11.

It should be noted that, the flat tube 11 of the present utility model is applied to a flat tube heat exchanger, specifically, a plurality of flat tubes 11 are provided in the flat tube heat exchanger, the plurality of flat tubes 11 are closely arranged and then connected with a header, and a refrigerant enters the flat tubes 11 through the header, flows in the refrigerant channels 12 of the flat tubes 11, and dissipates heat through the outer surfaces of the flat tubes 11.

Based on the structure, the flat tube 11 is extended along a direction, and then part of the flat tube 11 is bent for multiple times along the extending direction of the flat tube 11 to form a plurality of circular arc sections 114, the part of the flat tube 11 which is not bent is formed into a straight tube section 113, and the flat tube sections at the head end and the tail end of the flat tube 11 are all straight tube sections 113. Wherein, the bending directions of two adjacent arc segments 114 are the same, and two adjacent arc segments 114 are connected by a straight tube segment 113, and the straight tube segment 113 and the arc segment 114 are alternately connected and communicated to form the flat tube 11.

Wherein, the flat tube sections at the head and tail ends of the flat tube 11 are straight tube sections 113, so that the flat tube 11 and the collecting tube can be assembled conveniently. Because the bending directions of two adjacent arc segments 114 are the same, two arc segments 114 are connected by a straight pipe segment 113, so that the arc segments 114 are alternately connected with the straight pipe segment 113; a section of arc section 114 is arranged between two adjacent straight pipe sections 113, so that the strength of the flat pipe 11 can be enhanced, and the flat pipe 11 is prevented from being deformed under stress. After the flat tube 11 is bent, the overall length of the flat tube 11 in the length direction is reduced, so that more straight tube sections 113 and circular arc sections 114 can be arranged in the original length range of the flat tube 11, the overall length of the flat tube 11 is prolonged, and the heat exchange surface area of the flat tube 11 is further increased.

In addition, because the bending directions of the two adjacent arc segments 114 are the same, the openings 115 of the two adjacent arc segments 114 face the same direction, so that the flat tubes 11 can accommodate the flat tube segments of the adjacent flat tubes 11 positioned at one side of the opening 115, thereby realizing the compact arrangement of a plurality of flat tubes 11, being beneficial to arranging a large number of flat tubes 11 in the flat tube heat exchanger, and realizing the heat exchange effect of the flat tube heat exchanger by accumulating the outer surfaces of a large number of flat tubes 11 to form a larger heat exchange area.

When the arc segments 114 are formed by bending the flat tube 11 in a rotation manner around the extending direction, the rotation centers of the arc segments 114 are all located in the extending direction of the flat tube 11, and therefore, the opening directions of the arc segments 114 are the same and all face the rotation centers.

In the case of example 2,

referring to fig. 2, in the present embodiment, the flat tube 11 has a plurality of arc segments 114, the arc segments 114 have openings 115, so that the flat tube 11 has a plurality of openings 115, and two adjacent openings 115 on the flat tube 11 face opposite directions; wherein the opening 115 is adapted to receive a straight tube segment 113 or a circular arc segment 114 of the other flat tube 11.

On the basis of the structure, the flat tube 11 is firstly extended along one direction, then the flat tube 11 is bent for a plurality of times along the extending direction of the flat tube 11 to form a plurality of circular arc sections 114, the bending directions of two adjacent circular arc sections 114 are opposite, two end parts of the flat tube 11 are not bent to form two straight tube sections 113, and the flat tube sections at the head end and the tail end of the flat tube 11 are all the straight tube sections 113. The plurality of circular arc sections 114 between the two straight pipe sections 113 are sequentially joined and penetrated, and the straight pipe sections 113 and the circular arc sections 114 are joined and penetrated through by rounded corners to form the flat pipe 11.

Therefore, since the two adjacent flat tubes 11 are bent towards opposite directions, the two arc sections 114 can be directly connected without arranging a straight tube section 113 between the arc sections 114 and the arc sections 114, the length of the flat tube 11 in the length direction can be further reduced, more arc sections 114 can be arranged in the original length range of the flat tube 11, the whole length of the flat tube 11 is prolonged, and the heat exchange area of the flat tube 11 is increased through a plurality of arc sections 114.

The bending directions of the two adjacent arc segments 114 are opposite, so that the openings 115 of the two adjacent arc segments 114 face opposite directions. Since the opening 115 is used for accommodating the straight tube sections 113 or the circular arc sections 114 on the other flat tubes 11, the flat tubes 11 in the embodiment can accommodate the flat tube sections of the adjacent flat tubes 11 located at different sides of the flat tubes 11 at the same time, so as to realize the tight arrangement of the plurality of flat tubes 11.

In the case of example 3,

the flat tube 11 in this embodiment is the flat tube 11 in embodiment 1 or embodiment 2, and further, the flat tube 11 is treated with a softening process and is in a flexible state.

It should be noted that, in the present utility model, the flat tube 11 may be made of a metal material, and since the metal material has a certain ductility, the flat tube 11 may be bent to form the circular arc segment 114 at normal temperature. To further increase the strength of the flat tube 11 and to make it more ductile, the flat tube 11 may be subjected to a softening process, such as a heat treatment of the flat tube 11.

Specifically, in the heating stage of the heat treatment, the flat tube 11 is heated to be in a flexible state, and the flat tube 11 is conveniently bent for a plurality of times to form a plurality of circular arc sections 114 in the flexible state; in the cooling stage of the heat treatment, the flat tube 11 is hardened after being cooled, the strength of the flat tube 11 is improved, and the stress generated when the flat tube 11 is work hardened is eliminated, so that the flat tube 11 is easier to be welded after being connected with the header pipe in the subsequent processing stage.

Further, the flat tube 11 has a heat dissipating surface, and the heat dissipating surface is a non-flat surface.

Based on this structure, the flat tube 11 may be a flat tube having a square cross section. Specifically, the flat tube 11 having a flat shape is first extended in one direction, and then several portions of the flat tube 11 are bent toward one side or both sides of the thickness direction of the flat tube 11 to form a circular arc segment 114, and the portion of the flat tube 11 that is not bent is formed into a straight tube segment 113. Wherein, the cross section of each straight pipe section 113 and each circular arc section 114 is a square surface, and the straight pipe sections 113 are connected with the circular arc sections 114 to form a flat pipe.

The flat tube 11 has two large surfaces having a large area in the thickness direction and two small surfaces having a small area in the height direction; wherein, two large faces with larger area on the flat tube 11 are radiating faces, and the radiating faces are vertically arranged.

Because the flat tube 11 is provided with the straight tube section 113 and the circular arc section 114, the part of the radiating surface at the straight tube section 113 is a flat surface, the part of the radiating surface at the circular arc section 114 is a curved surface, that is, the radiating surface is alternately arranged with the flat surface and the curved surface along the length direction of the flat tube 11, and then the radiating surface is a non-flat surface.

Compared with a flat surface extending along the length direction of the flat tube 11, the non-flat heat dissipation surface has a curved surface structure to form a larger heat dissipation area, so that the heat exchange efficiency of the flat tube 11 can be increased. In addition, a plurality of protruding parts or grooves can be arranged on the radiating surface, so that the radiating surface presents an uneven non-flat surface, and the surface area of the heat exchange surface is further increased.

The heat exchange surface of the flat tube is vertically installed. Because under the low temperature condition, the air is easily evaporated by the refrigerant to take away heat, thereby condensing to form water drops, and when the water drops are accumulated on the flat tube 11, defrosting is easily affected to heat exchange performance of the heat exchanger. If the heat exchange surfaces of the flat tubes are horizontally installed, condensed water formed after air condensation is liable to accumulate on the heat exchange surfaces facing upward, resulting in poor drainage of the condensed water and defrosting at a sustained low temperature.

When the heat exchange surface of the flat tube is vertically arranged, the condensed water can fall under the action of gravity when the condensed water is attached to the heat exchange surface, so that the heat exchange surface is vertically arranged to be beneficial to discharging the condensed water, and the probability that the heat exchange performance of the heat exchanger is affected by condensation and frosting of water drops is further reduced.

Further, the flat tube 11 is provided with a refrigerant channel 12, and the cross section of the refrigerant channel 12 is a round surface.

Based on this structure, the flat tube 11 in this embodiment may be a circular tube, and the cross sections of the flat tube 11 and the refrigerant channel 12 are concentric circular surfaces similar to the inner and outer race tracks, so that the distance from the inner wall of the refrigerant channel 12 to the surface of the circular tube is consistent. When the refrigerant flows in the refrigerant channel 12, heat of the refrigerant can be uniformly transferred to the outer surface of the circular tube, and heat exchange is performed between the outer surface of the circular tube and air, so that heat dissipation or refrigeration is realized.

The outer surfaces of the round pipes are heat radiating surfaces, and the heat radiating surfaces are curved non-flat surfaces. Compared with the flat tube, the round tube in the embodiment bends the heat radiating surface in the height direction, so that the round tube can further extend to form a heat exchanging surface with larger area in the same height space, and the heat exchanging effect of the refrigerant and the air is further improved. In addition, as the outer surface of the flat pipe 11 is a curved surface, the wind resistance of the flat pipe 11 can be reduced, the wind loss can be reduced, and the flowing effect of air can be enhanced.

In the case of example 4,

the utility model also discloses a flat tube group 1, which comprises a plurality of the flat tubes 11, in particular a plurality of the flat tubes 11 are distributed at intervals in a first direction, and a plurality of the flat tubes 11 are distributed at intervals in a second direction to form the flat tube group 1; wherein, two adjacent arc segments 114 along the third direction in the flat tube group 1 are mutually embedded.

The first direction of the flat tube group 1 is perpendicular to the second direction, and the third direction is perpendicular to the plane of the flat tube group 1. In this embodiment, a plurality of flat tubes 11 arranged along a first direction are defined as first flat tubes, and a plurality of flat tubes 11 arranged along a second direction are defined as second flat tubes.

Since the openings 115 of the circular arc segments 114 in the flat tube 11 face the same direction or opposite directions, there are two ways in which two circular arc segments 114 adjacent to each other in the third direction in the flat tube group 1 are fitted to each other, and the following description will be given for these two fitting ways:

first, when the openings 115 of the arc segments 114 in the first flat tube and the second flat tube face the same direction, the openings 115 of two adjacent arc segments 114 in the third direction in the flat tube group 1 may be disposed opposite to each other.

Based on this structure, during assembly, the opening 115 of the circular arc segment 114 in the first flat tube may be first set towards one side in the third direction, and then the opening 115 of the circular arc segment 114 in the second flat tube may be set towards the other side in the third direction, so that the openings 115 of two adjacent circular arc segments 114 in the adjacent third direction are oppositely set.

Because the extending directions of the first flat tube and the second flat tube are mutually perpendicular, each first flat tube is perpendicular to each second flat tube, after two adjacent openings 115 of two adjacent arc segments 114 in the third direction are mutually embedded, two arc segments 114 corresponding to the two openings 115 are mutually perpendicular and partially mutually attached. Because the first flat tube is mutually embedded with the second flat tube, the space occupied by a plurality of flat tubes in the third direction is reduced, the heat exchanger can be provided with a plurality of flat tube groups 1, a large heat exchange surface is formed by accumulating a plurality of flat tubes 11, and the heat exchange effect of the heat exchanger is ensured.

Secondly, when the openings 115 of the arc segments 114 in the first flat tube and the second flat tube face opposite directions, the openings 115 of the adjacent two arc segments 114 in the third direction in the flat tube group 1 are opposite to each other and are opposite to each other.

On the basis of the structure, the first flat pipes can be used as an assembly basis, and the second flat pipes and the first flat pipes to be assembled are placed in a mutually perpendicular mode. During assembly, a second flat tube is firstly wound from the upper part of a first flat tube to be assembled to the lower part of an adjacent first flat tube, and then wound to the upper part of another adjacent first flat tube until the last first flat tube to be assembled is wound. By repeating this operation for the other second flat tube, the first flat tube and the second flat tube can be woven together, so that each opening 115 of the first flat tube accommodates a straight tube segment 113 or a flat tube segment in the second flat tube.

Specifically, since the circular arc segments 114 have the openings 115, the openings 115 can accommodate the circular arc segments 114 or the straight tube segments 113 adjacent in the third direction, so that the circular arc segments 114 of the two flat tubes 11 are fitted to each other. Referring to fig. 7, the same flat tube 11 has an opening 115 facing in the third direction and facing away from the third direction, so after the circular arc segment 114 or the straight tube segment 113 on the flat tube 11 is embedded into the opening 115 facing in the inner direction of the adjacent flat tube 11 in the third direction, the flat tube segments in the same flat tube 11 are staggered above and below the other flat tubes 11, so that the first flat tubes and the second flat tubes are arranged in a woven manner.

So, need not weld or other connecting pieces between first flat pipe and the second flat pipe and realize connecting, can directly weave the winding with each first flat pipe and each second flat pipe, alright be in the same place a plurality of flat pipes 11 intensive assembly.

Wherein, the circular arc section 114 of flat tube 11 has increased flat tube set 1 on the one hand and has exchanged the area with the air, on the one hand provides the opening 115 that holds flat tube section for adjacent flat tube 11 for a plurality of flat tubes in the third direction can gomphosis together, and has reduced the space that a plurality of flat tubes 11 occupy in the third direction, and the heat exchanger can install more flat tube sets 1, forms the large tracts of land radiating surface through a large amount of flat tube 11 accumulation.

In example 5 the process was carried out,

in this embodiment, the present utility model discloses another flat tube group 1, which includes a plurality of first flat tubes and a plurality of second flat tubes, specifically, the first flat tubes are the flat tubes 11 described above, the second flat tubes are straight tubes, that is, each portion of the second flat tubes is a straight tube segment 113. Each second flat tube is respectively arranged in each first flat tube in a penetrating way and is distributed along a direction to form a flat tube group 1, wherein the part of the second flat tube, which is arranged in the penetrating way of the circular arc section 114, is embedded into the circular arc section 114.

Based on this structure, the circular arc segment 114 of the first flat tube 11 in this embodiment is formed by bending the flat tube 11 in rotation about the extending direction. Since each circular arc segment 114 is rotated and bent and deviates from the extending direction of the flat tube 11, a receiving space is formed inside the circular arc segment 114 toward the rotation center, and the second flat tube extends into and passes through the receiving space. The second flat tube is inserted into the arc segment 114 through a portion of the arc segment 114.

Because the first flat tube is provided with the circular arc section 114, the circular arc section 114 can increase the heat exchange area of the first flat tube; and the circular arc section 114 of the first flat tube surrounds the accommodating space, so that after the second flat tube is installed in the accommodating space, the number of the flat tubes 11 can be further increased, and the space of the second flat tube occupying the flat tube group 1 can be saved.

The flat tube group 1 in this embodiment skillfully assembles the second flat tube into the accommodating space surrounded by the first flat tube, can arrange a greater number of flat tubes 11 in a limited space, and forms a larger heat exchange surface through accumulation of a great number of flat tubes 11, thereby enhancing the heat exchange efficiency of the flat tube group 1.

In example 6 the process was carried out,

the present embodiment also discloses a heat exchanger including a plurality of flat tube groups 1 in embodiment 4 and embodiment 5 described above, the plurality of flat tube groups 1 being arranged in a third direction.

In the present embodiment, the thickness direction of the flat tube group 1 is the third direction.

The number of the flat tubes 11 in the heat exchanger can be increased by arranging the plurality of flat tube groups 1 in the third direction, so that the heat exchange area of the heat exchanger and the air conditioner is further increased, and the heat exchange efficiency of the heat exchanger is enhanced.

Further, referring to fig. 4, the plurality of flat tube groups 1 are arranged in the third direction, wherein orthographic projections of adjacent two flat tubes 11 in adjacent two flat tube groups 1 in the third direction are perpendicular to each other.

In the prior art, the flat tubes 11 are connected with the flat tubes 11 through fins, an assembly gap exists between the adjacent flat tubes 11, and the fins are welded with the two adjacent flat tubes 11 after being mounted in the assembly gap. When the refrigerant radiates heat, the heat of the refrigerant is firstly transferred to the outer surface of the flat tube 11 from the inner wall of the refrigerant channel 12, and then transferred to the fins, and the heat exchange is carried out between the fins with larger surface area and the air. In order to ensure the heat transfer effect, the contact area between the flat tube 11 and the fins is large, the contact area between the flat tube 11 and the air is small, namely the heat exchange efficiency between the flat tube 11 and the air is low, and the heat exchange effect is ensured by the refrigerant mainly through the fins.

Therefore, in this embodiment, any two flat tubes 11 in two adjacent flat tube groups 1 are perpendicular to each other, so that the bonding area between the flat tubes 11 and the flat tubes 11 can be reduced, and the contact area between the flat tubes 11 and the air can be increased, thereby improving the heat exchange efficiency between the flat tubes 11 and the air. And the flat tube group 1 is provided with a plurality of flat tubes 11, and the outer surfaces of the flat tubes are accumulated to form a heat exchange surface area with larger area, so that the heat exchange efficiency of the refrigerant and the air is improved. The flat tubes 11 are compactly arranged in the flat tube group 1, gaps are reserved between heat exchange surfaces of adjacent flat tubes 11, and air can enter the gaps to be fully contacted with each flat heat exchange surface for heat exchange, so that the heat exchange efficiency of the heat exchanger can be further improved.

It should be noted that, in some embodiments, the flat tube 11 in the flat tube group 1 has two extending directions, and the extending direction of one flat tube group 1 is perpendicular to the extending direction of the other flat tube group 1. When the headers are installed, because the extending directions of the flat tubes 11 in the two adjacent flat tube groups 1 are mutually perpendicular, when the headers are arranged at the two ends of the flat tube groups 1, the corresponding headers in the two flat tube groups 1 are positioned at different sides, so that the installation of the headers and the flat tube groups 1 is convenient, and the condition that the headers interfere with each other does not occur; thus, the integral structure formed after the header pipe and the flat tube group 1 are installed is compact, and the stability of the heat exchanger can be enhanced.

The header is installed and communicates with each flat tube 11 in the flat tube group 1 so that a plurality of flow channels for the flow of refrigerant are formed in the flat tube group 1. Thus, the flow rate of the refrigerant in each flat tube group 1 can be independently controlled through the header, and the temperature gradient control of the front-back row or upper-lower row flat tube groups 1 can be realized, so that a large temperature difference between different flat tube groups 1 is prevented.

Further, when the flat tube 11 is a flat tube, the thickness value of the flat tube 11 in the thickness direction is D, and the value range of D is 0.1 to 1.0mm; when the flat tube 11 is a circular tube, the diameter value of the flat tube 11 is D, and the value range of D is 0.1-1.0mm.

The value range of D is not arbitrarily set, and the strength of the flat tube 11 and the wind resistance of the flat tube 11 need to be considered. If the value of D is smaller than 0.1mm, since the refrigerant channel 12 is further disposed in the flat tube 11, the thickness of the flat tube 11 is too thin, which results in lower strength of the flat tube 11, and the flat tube 11 is easy to be damaged when the flat tube 11 is plugged into and welded with the slot of the header. If the D value is greater than 1.0mm, the wind resistance of the flat tubes 11 is large, the flat tubes 11 cannot be densely arranged, and the heat exchange area needs to be increased by installing fins.

The D value is set between 0.1 and 1.0mm, so that the wind resistance of the flat tube 11 can be reduced and the air flow effect can be improved on the premise of ensuring the strength of the flat tube 11. Because the flat tube 11 in the utility model has smaller thickness compared with the flat tube 11 in the prior art, more flat tubes 11 can be distributed in the thickness direction, and a plurality of flat tube groups 1 can be accumulated to form a larger heat exchange area, so that fins are not required to be additionally arranged, heat is directly dissipated through the outer surface of the flat tube 11, and the structure of the heat exchange device is simplified. In addition, the thickness of the flat tube 11 is reduced, so that the width of the corresponding refrigerant channel 12 in the flat tube 11 is also reduced, thereby reducing the filling amount of the refrigerant and lowering the use cost.

The utility model also discloses an air conditioner comprising the heat exchanger.

Specifically, when the air conditioner is heated, the refrigerant is pressurized by the compressor to form high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the heat exchanger of the indoor unit of the air conditioner. In the heating state, the heat exchanger of the air conditioner indoor unit is equivalent to a condenser, the high-temperature high-pressure gaseous refrigerant is condensed into liquid refrigerant in the heat exchanger, heat is released in the condensing process, and the heat is released into the air through the heat exchange surface of the heat exchanger, so that the indoor air is heated, and the aim of improving the indoor temperature is fulfilled.

Then the liquid refrigerant formed by condensation is decompressed through a throttling device of the air conditioner and enters a heat exchanger of an outdoor unit of the air conditioner; in the heating state, the heat exchanger of the air conditioner outdoor unit corresponds to an evaporator. The liquid refrigerant is vaporized and gasified into gas through the heat exchanger, and heat of the outdoor air is absorbed in the gasification process, so that the outdoor air becomes colder; finally, the gaseous refrigerant reenters the compressor to begin the next cycle.

When the air conditioner is used for refrigerating, the heat exchanger of the air conditioner indoor unit is equivalent to an evaporator. After the liquid refrigerant enters the heat exchanger of the indoor unit of the air conditioner, the liquid refrigerant is vaporized and gasified through the heat exchanger to form gas, and heat of indoor air is absorbed in the gasification process, so that the indoor air becomes colder.

The gasified gaseous refrigerant enters a heat exchanger of an air conditioner outdoor unit, the heat exchanger of the air conditioner outdoor unit is equivalent to a condenser in a refrigeration state, the gaseous refrigerant with high temperature and high pressure is condensed and liquefied into liquid refrigerant in the heat exchanger of the air conditioner outdoor unit, and heat is released in the condensation process, and the heat is released into the air through the heat exchange surface of the heat exchanger, so that the outdoor air is hotter; finally, the liquid refrigerant reenters the compressor to begin the next cycle.

The air conditioner of the utility model adopts the heat exchanger, and the flat tube 11 in the heat exchanger is bent for a plurality of times to form the circular arc section 114, thereby increasing the heat exchange area of the flat tube 11; a large number of flat tubes 11 are woven and wound together, dense arrangement is achieved, and the assembly space of the flat tubes 11 is reduced, so that more flat tubes 11 can be arranged in the heat exchanger, and heat exchange efficiency is guaranteed.

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 flat pipe is characterized by comprising a plurality of first flat pipe sections and a plurality of second flat pipe sections, wherein the first flat pipe sections are straight pipe sections, the second flat pipe sections are arc sections, and two adjacent first flat pipe sections are connected through a plurality of second flat pipe sections; the circular arc section is used for accommodating straight pipe sections or circular arc sections of adjacent flat pipes.

2. The flat tube of claim 1, wherein the circular arc segments have openings, adjacent two of the openings in the same flat tube facing in the same direction.

3. The flat tube of claim 1, wherein the circular arc segments have openings, adjacent two of the openings in the same flat tube facing in opposite directions.

4. The flat tube according to claim 1, characterized in that the flat tube is treated in a softening process and is in a flexible state.

5. The flat tube of claim 1, wherein the flat tube has a heat dissipating surface thereon, the heat dissipating surface being a non-planar surface.

6. A flat tube set, comprising a plurality of flat tubes according to any one of claims 1-5, wherein the plurality of flat tubes are spaced apart in a first direction and the plurality of flat tubes are spaced apart in a second direction to form the flat tube set; two adjacent arc sections in the flat tube group along the third direction are mutually embedded.

7. A flat tube group, which is characterized by comprising a plurality of first flat tubes and a plurality of second flat tubes, wherein the first flat tubes are flat tubes according to any one of claims 1-5, the second flat tubes are straight tubes, the second flat tubes are arranged in the first flat tubes in a penetrating manner, and the second flat tubes are arranged in the arc sections in a penetrating manner.

8. A heat exchanger comprising a plurality of flat tube banks according to any one of claims 6 to 7, the plurality of flat tube banks being arranged in a third direction.

9. The heat exchanger of claim 8, wherein orthographic projections of adjacent two flat tubes in the adjacent two flat tube groups in the third direction are perpendicular to each other.

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