CN113883753A

CN113883753A - Liquid distributor for vertical heat exchanger, vertical heat exchanger and air conditioner

Info

Publication number: CN113883753A
Application number: CN202111113283.7A
Authority: CN
Inventors: 王小勇; 胡东兵; 胡海利; 卢杏斌
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-01-04

Abstract

The invention provides a liquid distributor for a vertical heat exchanger, the vertical heat exchanger and an air conditioner, relates to the technical field of air conditioners, and solves the technical problems that the effect of membrane distribution on a spiral coil is relatively poor and the heat exchange efficiency is influenced in the conventional vertical heat exchanger in the prior art. The liquid distributor for the vertical heat exchanger comprises a flow equalizing structure, wherein the flow equalizing structure is arranged between two adjacent circles of pipes on a spiral coil pipe of the vertical heat exchanger, and is provided with flow equalizing holes; the vertical heat exchanger comprises a gas-liquid separation structure, the liquid distribution area is provided with the gas-liquid separation structure, and the gas-liquid separation structure is formed on the gas guide pipe and inside the gas guide pipe; the invention can greatly improve the film distribution on the surface of the coil pipe, improve the uniformity of the film distribution and further improve the overall evaporation and heat exchange effect of the coil pipe.

Description

Liquid distributor for vertical heat exchanger, vertical heat exchanger and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a liquid distributor for a vertical heat exchanger, the vertical heat exchanger and an air conditioner with the vertical heat exchanger.

Background

In addition to the advantages and disadvantages of compressor performance greatly affecting unit energy efficiency, evaporator and condenser performance as the second of the four major components in an air conditioning system also greatly affects unit performance. For heat exchangers widely used in small refrigeration capacity machines such as modular machines and household machines, dry heat exchangers are often used as heat exchangers for the machines due to the limitation of factors such as the size of the machine set, the type of refrigerant and the size of a heat exchange tube. Although the energy-saving and emission-reducing device has great advantages in the aspects of cost, installation size and the like, the disadvantage of low energy efficiency is gradually shown along with the deepening of the policy of energy conservation and emission reduction.

The main reasons for the low energy efficiency of the dry heat exchanger are that the problems of uneven liquid separation of the refrigerant side tube box, small actual heat exchange area outside the used heat exchange tube (dry evaporation tube), the existence of a flow dead zone on the water side and the like. In order to solve the problems, researchers develop a small horizontal falling film heat exchanger by combining the advantages of high film evaporation energy efficiency of the falling film heat exchanger and capability of using a heat exchange tube for phase change heat exchange outside the tube for processing. But the required small-size heat exchange tube outer structure cannot be completely processed due to the size limitation of the heat exchanger and the prior art.

Meanwhile, based on the above problems, researchers developed vertical falling film heat exchangers. The falling film coil pipe structure realizes larger heat exchange area and heat exchange efficiency in a smaller space, has better prospect, and is one of the choices for replacing the existing dry heat exchanger. However, it also has the following problems, which are particularly shown in: firstly, referring to fig. 1, the conventional vertical falling film heat exchanger is provided, a gaseous refrigerant with a large flow rate easily causes large disturbance to a liquid refrigerant, so that liquid distribution is uneven, surface dry spots of a heat exchange tube are caused, and the heat exchange area is not fully utilized; secondly, the heat exchange tube exists in the form of a coil, and due to reasons such as airflow impact and vibration, the film distribution on the surface of the coil is not uniform, and the heat exchange effect is poor.

Disclosure of Invention

The invention aims to provide a liquid distributor for a vertical heat exchanger, the vertical heat exchanger and an air conditioner, and solves the technical problems that the effect of membrane distribution on a spiral coil is relatively poor and the heat exchange efficiency is influenced in the conventional vertical heat exchanger in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a liquid distributor for a vertical heat exchanger, which comprises a flow equalizing structure, wherein the flow equalizing structure is arranged between two adjacent circles of pipes on a spiral coil pipe of the vertical heat exchanger, flow equalizing holes are formed in the flow equalizing structure, the flow equalizing structure can receive refrigerant dropping from an upper layer of pipes adjacent to the flow equalizing structure and can collect the refrigerant on the flow equalizing structure to flow to a lower layer of pipes adjacent to the flow equalizing structure through the flow equalizing holes.

Furthermore, the flow equalizing structures are distributed along the height direction of the vertical heat exchanger, two adjacent flow equalizing structures are provided with a circle of pipe of the spiral coil, and every two adjacent flow equalizing structures are sequentially connected to form a spiral flow channel.

Furthermore, the upper end and the lower end of the spiral runner are respectively provided with a connecting plate, and the connecting plates are fixedly connected with the spiral coil.

Furthermore, the flow equalizing holes are uniformly distributed at intervals along the circumferential direction of the flow equalizing structure, and the included angle between every two adjacent flow equalizing holes along the circumferential direction ranges from 5 degrees to 30 degrees.

Furthermore, the flow equalizing holes are round holes, and the aperture range of the flow equalizing holes is 1-6 mm; or the flow equalizing holes are rectangular holes, the long sides of the flow equalizing holes extend along the length extension direction of the flow equalizing structure, the width range of the flow equalizing holes is 1-4 mm, and the ratio of the length to the width of the flow equalizing holes is not less than 3.

Further, the structure of flow equalizing includes bottom plate and curb plate, the both sides of bottom plate set up with the bottom plate is connected the curb plate, the bottom plate is located the correspondence under the upper tube, set up on the bottom plate flow equalizing hole, bottom plate and two the curb plate encloses into there is the runner.

Further, the side plates are inclined towards the direction away from the other side plate from the side connected with the bottom plate to the side away from the bottom plate, and the included angle between the bottom plate and the side plates ranges from 90 degrees to 150 degrees.

Further, the height range of the flow equalizing structure is 10 mm-30 mm; the width of the bottom surface of the flow equalizing structure is larger than the outer diameter of the spiral coil pipe, and the difference between the width of the bottom surface of the flow equalizing structure and the outer diameter of the coil pipe is 10-40 mm.

The invention provides a vertical heat exchanger which comprises a spiral coil, wherein a liquid distributor for the vertical heat exchanger is arranged in a falling film area in the vertical heat exchanger.

Further, the vertical heat exchanger comprises a shell, an air guide pipe and a gas-liquid separation structure, wherein the air guide pipe and the gas-liquid separation structure are arranged in the shell, a liquid distribution area is formed in the shell, the gas-liquid separation structure is arranged in the liquid distribution area, and the gas-liquid separation structure is formed on the air guide pipe and inside the air guide pipe.

Further, the gas-liquid separation structure includes air guide hole and fender liquid pipe, the air duct is located distribute on the district's section of cloth liquid district the air guide hole, it sets up to keep off the liquid pipe in the air duct just keep off the lateral wall of liquid pipe with there is the interval between the inside wall of air duct, keep off the liquid pipe with the gas vent is linked together on the casing.

Furthermore, the sum of the areas of all the air guide holes on the air guide pipe is 3-8 times of the cross sectional area of the refrigerant inlet of the vertical heat exchanger.

Furthermore, the air guide holes are uniformly distributed at intervals along the circumferential direction of the air guide tube, and a plurality of circles of air guide holes are distributed at intervals along the axial direction parallel to the air guide tube.

Further, the diameter range of the air guide hole is 2 mm-8 mm; the distance between two air guide holes which are adjacent along the axial direction parallel to the air guide pipe ranges from 12mm to 20 mm.

Furthermore, the air guide hole positioned at the lowest part on the air guide tube and the bottom end of the liquid blocking tube are spaced by 80-300 mm.

Further, the liquid blocking pipe is collinear with the axis of the air guide pipe; the distance between the outer side wall of the liquid blocking pipe and the inner side wall of the air guide pipe ranges from 20mm to 100 mm.

Further, a liquid homogenizing plate is arranged in the shell, the liquid distributing area is arranged above the liquid homogenizing plate, and the distance range between the air guide hole located at the lowest position on the air guide pipe and the upper plate surface of the liquid homogenizing plate is not less than 15 mm.

Furthermore, the bottom of the liquid blocking pipe is provided with a filtering structure, and the filtering structure is used for filtering liquid refrigerants.

Further, the gas-liquid separation structure is arranged in the falling film area.

The invention provides an air conditioner, which comprises the vertical heat exchanger.

The invention provides a liquid distributor for a vertical heat exchanger, which comprises a flow equalizing structure, wherein the flow equalizing structure is arranged between two adjacent circles of pipes on a spiral coil of the vertical heat exchanger, flow equalizing holes are formed in the flow equalizing structure, the flow equalizing structure can receive a refrigerant dripped from an upper layer pipe adjacent to the flow equalizing structure, the refrigerant collected on the flow equalizing structure can flow to a lower layer pipe adjacent to the flow equalizing structure through the flow equalizing holes, secondary liquid equalization is realized through the flow equalizing structure, the action of airflow tangential force can be reduced as much as possible, the film distribution on the surface of the coil can be greatly improved, the uniformity of the film distribution is improved, and the overall evaporation heat exchange effect of the coil is further improved.

The preferred technical scheme of the invention can at least produce the following technical effects:

vertical heat exchanger includes the gas-liquid separation structure, form the cloth liquid district in the casing, the cloth liquid district is equipped with the gas-liquid separation structure, the gas-liquid separation structure forms on the air duct and forms in the inside of air duct, through the gas-liquid separation structure, advance the gas-liquid separation to the refrigerant that gets into in the casing, the gas refrigerant of separation passes through the gas vent and discharges, can weaken the impact influence of gaseous refrigerant to liquid refrigerant by a wide margin, it is even to do benefit to the cloth liquid, promote the cloth liquid effect on heat exchange tube surface, and then promote heat transfer effect.

Drawings

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

FIG. 1 is a schematic view of the internal structure of a vertical heat exchanger according to the prior art;

FIG. 2 is a schematic diagram of the internal structure of a vertical heat exchanger according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a vertical heat exchanger provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a spiral flow channel provided in an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a spiral flow channel provided by an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a schematic cross-sectional view of a gas-liquid separator provided in an embodiment of the invention;

FIG. 8 is a schematic front view of a spiral flow channel provided in an embodiment of the present invention;

fig. 9 is another schematic front view of the spiral flow channel according to the embodiment of the present invention.

FIG. 1-spiral coil; 2-flow equalizing hole; 3-a spiral flow channel; 4-connecting plates; 5-a bottom plate; 6-side plate; 7-a housing; 8-a gas-guide tube; 9-liquid distribution area; 10-a membrane-lowering zone; 11-gas-guide holes; 12-a liquid retaining pipe; 13-an exhaust port; 14-a refrigerant inlet; 15-liquid homogenizing plate; 16-a filter structure; 17-flooded area.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention provides a liquid distributor for a vertical heat exchanger, which comprises a flow equalizing structure, wherein the flow equalizing structure is arranged between two adjacent circles of pipes on a spiral coil 1 of the vertical heat exchanger, the flow equalizing structure is provided with flow equalizing holes 2, the flow equalizing structure can receive a refrigerant dripped from an upper layer pipe adjacent to the flow equalizing structure and collect the refrigerant on the flow equalizing structure to a lower layer pipe adjacent to the flow equalizing structure through the flow equalizing holes 2, secondary liquid equalization is realized through the flow equalizing structure, the action of airflow tangential force can be reduced as much as possible, the film distribution on the surface of the coil can be greatly improved, the uniformity of the film distribution is improved, and the overall evaporation heat exchange effect of the coil is further improved.

As an optional implementation manner, the flow equalizing structures are distributed along the height direction of the vertical heat exchanger and sequentially arranged between two adjacent circles of pipes of the spiral coil 1, two adjacent flow equalizing structures are arranged on one circle of pipes of the spiral coil 1, and every two adjacent flow equalizing structures are sequentially connected to form the spiral flow channel 3. Referring to fig. 2 and 3, a spiral flow channel 3 is shown schematically assembled on a spiral coil 1; referring to fig. 4, a spiral flow channel 3 is shown, and in the falling film region 10, a flow equalizing structure is correspondingly arranged below each circle of pipe of the spiral coil pipe 1, so that the film distribution on the surface of the coil pipe can be greatly improved, and the uniformity of the film distribution is improved.

As an alternative embodiment, the flow equalizing holes 2 are evenly spaced along the circumferential direction of the flow equalizing structure. The flow equalizing hole 2 is a circular hole, and the aperture range of the flow equalizing hole 2 is 1 mm-6 mm; or the flow equalizing holes 2 are rectangular holes, the long sides of the flow equalizing holes 2 extend along the length of the flow equalizing structure, the width range of the flow equalizing holes 2 is 1-4 mm, and the ratio of the length to the width of the flow equalizing holes 2 is not less than 3. The flow equalizing hole 2 is not limited to a circular hole or a rectangular hole, and may be a hole of another shape. Regarding the limitation of the size of the flow equalizing hole 2, the aperture of the flow equalizing hole 2 should not be too large, otherwise, the liquid film would be too thick; of course, the aperture of the flow equalizing hole 2 is not too small, so that the liquid film is thin and the dry spots on the surface of the heat exchange tube are easy to cause.

As an optional implementation manner, the specific structure of the current sharing structure is as follows: referring to fig. 5 and 6, the structure of flow equalizing includes bottom plate 5 and curb plate 6, and the both sides of bottom plate 5 set up the curb plate 6 that is connected with bottom plate 5, and bottom plate 5 is located the corresponding upper strata under the pipe, sets up flow equalizing hole 2 on the bottom plate 5, and bottom plate 5 and curb plate 6 enclose into there is the runner, and the structure of flow equalizing of being convenient for accepts the refrigerant that drips from the adjacent upper strata pipe of the structure of flow equalizing.

As an optional embodiment, the side plates 6 are inclined from the side connected with the bottom plate 5 to the side far from the bottom plate 5, and the side plates 6 are inclined towards the direction far from the other side plate 6, so that the refrigerant dropping from the spiral coil 1 can be received by the spiral flow channel 3, the liquid splashing influence is reduced, and specifically, the included angle θ 1 between the bottom plate 5 and the side plates 6 can be in the range of 90 ° to 150 °.

As an optional embodiment, the height of the flow equalizing structure ranges from 10mm to 30 mm; the width of the bottom surface of the flow equalizing structure is larger than the outer diameter of the spiral coil pipe 1, the difference between the width of the bottom surface of the flow equalizing structure and the outer diameter of the coil pipe is 10-40 mm, and the refrigerant liquid is ensured not to overflow on the basis of convenient processing and forming.

A vertical heat exchanger comprises a spiral coil 1, and a liquid distributor for the vertical heat exchanger is arranged in a falling film area 10 in the vertical heat exchanger. Because the liquid-full area 17 in the vertical heat exchanger bears the liquid refrigerant, a flow equalizing structure matched with the spiral coil 1 does not need to be arranged in the liquid-full area 17.

As an alternative embodiment, the vertical heat exchanger includes a housing 7, a gas-guide tube 8 disposed in the housing 7, and a gas-liquid separation structure, a liquid distribution area 9 is formed in the housing 7, the liquid distribution area 9 is provided with the gas-liquid separation structure, and the gas-liquid separation structure is formed on the gas-guide tube 8 and inside the gas-guide tube 8. Through the gas-liquid separation structure, the refrigerant that gets into in the casing 7 advance the gas-liquid separation, can weaken gaseous refrigerant to the impact influence of liquid refrigerant by a wide margin, do benefit to the cloth liquid evenly, promote the cloth liquid effect on heat exchange tube surface, and then promote the heat transfer effect.

The gas-liquid separation structure is specifically as follows: the gas-liquid separation structure includes gas guide hole 11 and fender liquid pipe 12, and gas guide hole 11 distributes on the district's section that gas-guide tube 8 is located cloth liquid district 9, keeps off liquid pipe 12 and sets up in gas-guide tube 8 and keeps off and have the interval between the lateral wall of liquid pipe 12 and the inside wall of gas-guide tube 8, and the preferred axis collineation that keeps off liquid pipe 12 and gas-guide tube 8 keeps off liquid pipe 12 and is linked together with gas vent 13 on casing 7. When the vertical heat exchanger is used as an evaporator, gas-liquid two-phase refrigerants to be evaporated, which enter the shell from a liquid inlet pipe horizontally inserted into the upper portion of the shell, move along the inner wall of the shell 7, the gas-liquid two-phase refrigerants are separated under the dual action of gravity and centrifugal force, larger liquid drops sink to the liquid equalizing plate 15 and flow to the surface of the spiral coil 1 from liquid equalizing holes of the liquid equalizing plate, the remaining gas carries small liquid drops to pass through the gas guide holes 11 in the upper portion of the gas guide pipe 8, the gas-liquid separation can be further realized by collision between the gas guide holes 11 and the liquid blocking pipe 12, the separated gas-state refrigerants enter the liquid blocking pipe 12 through the bottom of the liquid blocking pipe 12 and are discharged through the exhaust holes 13, and before heat exchange is carried out on the refrigerants with the spiral coil 1, the separation of the gas-state refrigerants and the liquid-state refrigerants are separated in advance, and the impact influence of the gas-state refrigerants on the liquid-state refrigerants is weakened.

In an optional embodiment, the sum of the areas of all the air guide holes 11 on the air guide pipe 8 is larger than the cross-sectional area of the refrigerant inlet 14 of the vertical heat exchanger for reducing the flow velocity of the refrigerant, and the sum of the areas of all the air guide holes 11 on the air guide pipe 8 may be 3-8 times of the cross-sectional area of the refrigerant inlet 14 of the vertical heat exchanger.

As an alternative embodiment, the air holes 11 are uniformly distributed at intervals along the circumferential direction of the air duct 8, and a plurality of circles of air holes 11 are distributed at intervals along the axial direction parallel to the air duct 8. The gas guide hole 11 positioned at the lowest part on the gas guide pipe 8 has a distance with the bottom end of the liquid blocking pipe 12, so that a gas refrigerant carrying small liquid drops collides with the liquid blocking pipe 12 through the gas guide hole 11, further gas-liquid separation is realized, and the distance h4 between the gas guide hole 11 positioned at the lowest part on the gas guide pipe 8 and the bottom end of the liquid blocking pipe 12 can be set to be 80-300 mm.

As an optional embodiment, a liquid homogenizing plate 15 is arranged in the casing 7, a liquid distribution area 9 is arranged above the liquid homogenizing plate 15, a distance exists between the air guide hole 11 located at the lowest position on the air guide pipe 8 and the upper plate surface of the liquid homogenizing plate 15, so that liquid refrigerant on the liquid homogenizing plate 15 is prevented from flowing into the air guide pipe 8 through the air guide hole 11, and the distance h3 between the air guide hole 11 located at the lowest position on the air guide pipe 8 and the upper plate surface of the liquid homogenizing plate 15 is set to be not less than 15 mm.

In an alternative embodiment, the bottom of the liquid blocking pipe 12 is provided with a filtering structure 16, and the filtering structure 16 is used for filtering the liquid refrigerant. The filtering structure 16 further filters the refrigerant carrying small liquid droplets, and the separated liquid refrigerant drops to the liquid full region 17 under the action of gravity, thereby improving the heat exchange performance and the gas-liquid separation efficiency.

Note that a gas-liquid separation structure may be provided in the falling film zone 10. Namely, the air guide pipe 8 is provided with air guide holes 11 on the area of the liquid distribution area 9,

example 1:

the invention provides a liquid distributor for a vertical heat exchanger, which comprises a flow equalizing structure, wherein the flow equalizing structure is arranged between two adjacent circles of pipes of a spiral coil 1 of the vertical heat exchanger, flow equalizing holes 2 are formed in the flow equalizing structure, the flow equalizing structure can receive a refrigerant dropping from an upper layer pipe adjacent to the flow equalizing structure, and the refrigerant collected in the flow equalizing structure can flow to a lower layer pipe adjacent to the flow equalizing structure through the flow equalizing holes 2. The flow equalizing structure is distributed along the height direction of the vertical heat exchanger and is sequentially arranged between two adjacent coils of the spiral coil 1, and the two adjacent flow equalizing structures are connected to enable all the flow equalizing structures to form a spiral flow channel 3. Referring to fig. 2 and 3, the assembly of the helical flow path 3 on the helical coil 1 is illustrated; referring to fig. 4, the helical flow channels 3 are illustrated.

The upper end and the lower end of the spiral runner 3 are respectively provided with a connecting plate 4, and the connecting plates 4 are fixedly connected with the spiral coil 1. Referring to fig. 4, a connecting plate 4 is illustrated, the connecting plate 4 being welded to the spiral coil 1 to achieve the fixation of the spiral flow channel 3 to the spiral coil 1.

Referring to fig. 4 and 8, the flow equalizing holes 2 are uniformly distributed at intervals along the circumferential direction of the flow equalizing structure, and an included angle θ 2 between two adjacent flow equalizing holes 2 along the circumferential direction ranges from 5 ° to 30 °, preferably 15 °, wherein the included angle θ 2 is an included angle between the centers of two adjacent flow equalizing holes 2. Referring to fig. 8, the flow equalizing hole 2 is a circular hole, and the aperture phi 1 of the flow equalizing hole 2 ranges from 1mm to 6mm, preferably 3 mm; or, referring to fig. 9, the flow equalizing hole 2 is a rectangular hole, the long side of the flow equalizing hole 2 extends along the length of the flow equalizing structure, the width L3 of the flow equalizing hole 2 ranges from 1mm to 4mm, preferably 1.5mm, the ratio of the length to the width of the flow equalizing hole 2 is not less than 3, and the length L2 of the flow equalizing hole 2 is preferably 10 mm.

Referring to fig. 6, the structure of flow equalizing includes bottom plate 5 and curb plate 6, and the both sides of bottom plate 5 set up the curb plate 6 that is connected with bottom plate 5, and bottom plate 5 is located the corresponding upper strata under the pipe, sets up flow equalizing hole 2 on the bottom plate 5, and bottom plate 5 and two curb plates 6 enclose into the runner. The side plate 6 is inclined from the side connected with the bottom plate 5 to the side far away from the bottom plate 5 in the direction far away from the other side plate 6, and the included angle theta 1 between the bottom plate 5 and the side plate 6 ranges from 90 degrees to 150 degrees. Referring to fig. 6, the height h1 of the flow equalizing structure ranges from 10mm to 30mm, preferably 15 mm; the bottom surface width L1 of the flow equalizing structure is larger than the outer diameter of the spiral coil 1, and the difference between the bottom surface width of the flow equalizing structure and the outer diameter of the coil is 10-40 mm.

Example 2:

a vertical heat exchanger comprises the liquid distributor for the vertical heat exchanger described in embodiment 1, and a falling film area 10 in the vertical heat exchanger is provided with the liquid distributor for the vertical heat exchanger. Referring to fig. 1, the vertical heat exchanger is schematically shown to comprise a shell 7, an air duct 8 arranged in the shell 7, a spiral coil 1 and other structures, and the liquid distributor is matched with the spiral coil 1.

Example 3:

different from embodiment 2, vertical heat exchanger still includes the gas-liquid separation structure, and the gas-liquid separation structure includes air guide hole 11 and keeps off liquid pipe 12, and air guide pipe 8 distributes air guide hole 11 on being located the region of cloth liquid district 9, keeps off liquid pipe 12 and sets up in air guide pipe 8 and keep off and have the interval between the lateral wall of liquid pipe 12 and the inside wall of air guide pipe 8, keeps off liquid pipe 12 and is linked together with gas vent 13 on casing 7.

The area sum of all the air guide holes 11 on the air guide pipe 8 is 3-8 times, preferably 5 times of the cross sectional area of the refrigerant inlet 14 of the vertical heat exchanger; the air guide holes 11 are uniformly distributed at intervals along the circumferential direction of the air guide pipe 8, and a plurality of circles of air guide holes 11 are distributed at intervals along the axial direction parallel to the air guide pipe 8; the diameter phi 2 of the air guide hole 11 ranges from 2mm to 8mm, and is preferably 5 mm; the distance h2 between two air guide holes 11 adjacent to each other along the axial direction parallel to the air guide tube 8 ranges from 12mm to 20mm, preferably 15mm, and referring to fig. 7, h2 is the distance between the central axes of the two adjacent air guide holes 11; the distance h4 between the air vent 11 positioned at the lowest part on the air duct 8 and the bottom end of the liquid blocking pipe 12 ranges from 80mm to 300mm, preferably 150mm, and referring to fig. 7, h4 is the distance between the bottom of the air vent 11 at the lowest part and the bottom end of the liquid blocking pipe 12; the liquid blocking pipe 12 and the air guide pipe 8 are collinear in axis, and a distance L4 between the outer side wall of the liquid blocking pipe 12 and the inner side wall of the air guide pipe 8 ranges from 20mm to 100mm, and preferably ranges from 50 mm; referring to fig. 3, a liquid homogenizing plate 15 is arranged in the casing 7, a liquid distribution area 9 is arranged above the liquid homogenizing plate 15, the range of the distance h3 between the air guide hole 11 positioned at the lowest part on the air guide pipe 8 and the upper plate surface of the liquid homogenizing plate 15 is not less than 15mm, and the distance between the bottom of the air guide hole 11 positioned at the lowest part of h3 and the upper plate surface of the liquid homogenizing plate 15.

In addition, the bottom of the liquid blocking pipe 12 is provided with a filtering structure 16, the filtering structure 16 is used for filtering liquid refrigerants, the filtering structure 16 is used for further filtering the refrigerants carrying small liquid droplets, and the separated liquid refrigerants drop to the liquid full area 17 under the action of gravity, so that the heat exchange performance and the gas-liquid separation efficiency are improved.

Example 4:

an air conditioner comprising the vertical heat exchanger described in embodiment 2 or embodiment 3.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The liquid distributor for the vertical heat exchanger is characterized by comprising a flow equalizing structure which is arranged between two adjacent circles of pipes on a spiral coil (1) of the vertical heat exchanger, wherein,

the flow equalizing structure is provided with flow equalizing holes (2), and the flow equalizing structure can accept the refrigerant dropping from the upper layer pipe adjacent to the flow equalizing structure and collect the refrigerant of the flow equalizing structure can flow to the lower layer pipe adjacent to the flow equalizing structure through the flow equalizing holes (2).

2. The liquid distributor for vertical heat exchanger according to claim 1, wherein the flow equalizing structures are distributed along the height direction of the vertical heat exchanger, and two adjacent flow equalizing structures are provided with one circle of pipes of the spiral coil (1), and every two adjacent flow equalizing structures are sequentially connected to form a spiral flow channel (3).

3. The liquid distributor for the vertical heat exchanger according to claim 2, wherein the upper end and the lower end of the spiral flow channel (3) are respectively provided with a connecting plate (4), and the connecting plates (4) are fixedly connected with the spiral coil (1).

4. The liquid distributor for the vertical heat exchanger according to claim 1, wherein the flow equalizing holes (2) are uniformly distributed at intervals along the circumferential direction of the flow equalizing structure, and the included angle between two circumferentially adjacent flow equalizing holes (2) ranges from 5 degrees to 30 degrees.

5. The liquid distributor for the vertical heat exchanger according to claim 1, wherein the flow equalizing hole (2) is a circular hole, and the diameter of the flow equalizing hole (2) ranges from 1mm to 6 mm; or the flow equalizing holes (2) are rectangular holes, the long sides of the flow equalizing holes (2) extend along the length extension direction of the flow equalizing structure, the width range of the flow equalizing holes (2) is 1-4 mm, and the ratio of the length to the width of the flow equalizing holes (2) is not less than 3.

6. The liquid distributor for the vertical heat exchanger according to claim 1, wherein the flow equalizing structure comprises a bottom plate (5) and side plates (6), the side plates (6) connected with the bottom plate (5) are arranged on two sides of the bottom plate (5), the bottom plate (5) is located right below the corresponding tubes on the upper layer, the flow equalizing holes (2) are arranged on the bottom plate (5), and a flow channel is defined by the bottom plate (5) and the two side plates (6).

7. The liquid distributor for the vertical heat exchanger according to claim 6, wherein the side plates (6) are inclined from the side connected with the bottom plate (5) to the side far away from the bottom plate (5), the side plates (6) are inclined in the direction far away from the other side plate (6), and the included angle between the bottom plate (5) and the side plates (6) ranges from 90 degrees to 150 degrees.

8. The liquid distributor for the vertical heat exchanger according to claim 6, wherein the height of the flow equalizing structure ranges from 10mm to 30 mm; the width of the bottom surface of the flow equalizing structure is larger than the outer diameter of the spiral coil (1), and the difference between the width of the bottom surface of the flow equalizing structure and the outer diameter of the coil is 10-40 mm.

9. Vertical heat exchanger, characterized in that it comprises a spiral coil (1), and the falling film area (10) in the vertical heat exchanger is provided with the liquid distributor for vertical heat exchanger according to any one of claims 1-8.

10. Vertical heat exchanger according to claim 9, characterised in that it comprises a casing (7), a gas-conducting tube (8) arranged inside the casing (7) and a gas-liquid separation structure, a liquid distribution zone (9) being formed inside the casing (7), the liquid distribution zone (9) being provided with the gas-liquid separation structure, the gas-liquid separation structure being formed on the gas-conducting tube (8) and inside the gas-conducting tube (8).

11. The vertical heat exchanger according to claim 10, wherein the gas-liquid separation structure comprises gas guide holes (11) and a liquid blocking pipe (12), the gas guide pipe (8) is located on the section of the liquid distribution area (9) and the gas guide holes (11) are distributed, the liquid blocking pipe (12) is arranged in the gas guide pipe (8), a distance exists between the outer side wall of the liquid blocking pipe (12) and the inner side wall of the gas guide pipe (8), and the liquid blocking pipe (12) is communicated with the exhaust hole (13) on the shell (7).

12. The vertical heat exchanger according to claim 11, wherein the sum of the areas of all the air guide holes (11) on the air guide tube (8) is 3-8 times of the cross-sectional area of the refrigerant inlet (14) of the vertical heat exchanger.

13. The vertical heat exchanger according to claim 11, wherein the air holes (11) are uniformly distributed at intervals along the circumferential direction of the air guide tube (8), and a plurality of circles of air holes (11) are distributed at intervals along the axial direction parallel to the air guide tube (8); the diameter range of the air guide hole (11) is 2-8 mm; the distance between two air guide holes (11) which are adjacent along the axial direction parallel to the air guide pipe (8) ranges from 12mm to 20 mm.

14. The vertical heat exchanger according to claim 11, wherein the air guide hole (11) positioned at the lowest part on the air guide tube (8) is spaced from the bottom end of the liquid baffle tube (12) by 80-300 mm; set up in casing (7) and all liquid board (15), the top of all liquid board (15) is cloth liquid district (9), be located the below on air duct (8) air guide hole (11) with the interval scope of the face is not less than 15mm on all liquid board (15).

15. Vertical heat exchanger according to claim 11, characterised in that the liquid baffle (12) is collinear with the axis of the gas duct (8); the distance between the outer side wall of the liquid blocking pipe (12) and the inner side wall of the air guide pipe (8) ranges from 20mm to 100 mm.

16. Vertical heat exchanger according to claim 11, characterised in that the bottom of the liquid baffle (12) is provided with a filtering structure (16), and the filtering structure (16) is used for filtering liquid refrigerant.

17. Vertical heat exchanger according to claim 10, wherein the gas-liquid separation structure is arranged within the falling film zone (10).

18. An air conditioner characterized by comprising the vertical heat exchanger according to any one of claims 9 to 17.