WO2020024513A1

WO2020024513A1 - Liquid arrangement device, heat exchanger and air conditioning unit

Info

Publication number: WO2020024513A1
Application number: PCT/CN2018/120590
Authority: WO
Inventors: 刘华; 张治平; 游浩亮; 胡东兵; 胡海利
Original assignee: 珠海格力电器股份有限公司
Priority date: 2018-08-03
Filing date: 2018-12-12
Publication date: 2020-02-06
Also published as: CN108917232A

Abstract

Disclosed are a liquid arrangement device, a heat exchanger and an air conditioning unit. The liquid arrangement device comprises an upper sealing plate (1) and a lower housing (2), wherein the upper sealing plate (1) is disposed on the top of the lower housing (2) and together with the lower housing (2) encloses a liquid arrangement cavity (3) , the rim of the lower housing (2) bends toward the outside of the liquid arrangement cavity (3) to form a first bending portion (21), and the first bending portion (21) is arranged to be riveted to the upper sealing plate (1). By means of the arrangement of riveting the upper sealing plate (1) and the lower housing (2), the assembly efficiency and assembly accuracy can be improved, and welding deformation of the liquid arrangement device can be effectively prevented; and providing a first liquid equalization plate (4) and a second liquid equalization plate (6) allows liquid equalization on the liquid arrangement device three times, thereby ensuring that a refrigerant is evenly distributed axially and radially after entering the inside of the liquid arrangement device, and ensuring the liquid arrangement effect of the liquid arrangement device.

Description

Liquid distributor, heat exchanger and air-conditioning unit

This application is based on the Chinese application No. 201810879931.1, the application date is August 3, 2018, and the invention name is “Liquid Distributor, Heat Exchanger and Air Conditioning Unit”, and claims its priority. The disclosure is incorporated herein as a whole.

Technical field

The present disclosure relates to the technical field of air conditioning, and in particular to a liquid distributor, a heat exchanger, and an air conditioning unit.

Background technique

Among commercial large-scale chiller evaporator types, falling film evaporators are favored due to their high heat exchange efficiency, low filling volume, and convenient maintenance. The principle of the falling film evaporator is that the liquid thin film refrigerant arranged on the surface of the heat exchange tube through the liquid distributor changes the heat with the surface of the heat exchange tube. Therefore, the quality of the liquid distribution of the liquid distributor on the surface of the heat exchange tube directly affects Heat transfer efficiency to the evaporator. However, the liquid distributor known by the present inventors has the problems of low liquid leveling effect and uneven liquid leveling effect.

Summary of the invention

Embodiments of the present disclosure provide a liquid distributor, a heat exchanger, and an air-conditioning unit that have a uniform liquid homogeneous effect and high liquid homogeneous efficiency.

According to an aspect of the present disclosure, a liquid distributor is provided, which includes an upper sealing plate and a lower casing. The upper sealing plate is disposed on an upper portion of the lower casing and forms a liquid distribution cavity with the lower casing, and an edge of the lower casing The first bending portion is formed by being bent toward the outside of the liquid distribution chamber. The first bending portion is fixedly disposed with the upper sealing plate, and the first casing is provided with a first liquid outlet hole.

The upper sealing plate is provided with a liquid inlet which communicates with the liquid distribution chamber.

The edge of the upper sealing plate protrudes from the first bent portion and is bent in the direction of the liquid distribution cavity to form a second bent portion. The length of the second bent portion is greater than the thickness of the first bent portion.

The liquid distributor further includes a first liquid leveling plate, the first liquid leveling plate is provided with a first liquid leveling hole, and the first liquid leveling plate is disposed in the liquid leveling chamber and is sealed with the upper sealing plate to form a first liquid leveling chamber. .

All the first homogenizing holes are distributed on the first homogenizing plate in at least two rows.

The area of all first homogenizing holes is larger than the area of the liquid inlet.

The projection of the circle center of the liquid inlet on the first liquid leveling plate is located at the center line in the length direction of the first liquid leveling plate.

The width of the first homogenizing plate gradually decreases from the middle of the first homogenizing plate to both ends of the first homogenizing plate, and the center line of the first homogenizing holes in the same row is parallel to the corresponding of the first homogenizing plate. Of the edges.

The liquid distributor further includes at least one support bar, an upper end of the support bar is disposed on the upper sealing plate, and a lower end of the support bar is fixedly disposed on the first liquid leveling plate.

All the support bars are disposed on the first liquid leveling plate along a center line direction parallel to the width direction of the first liquid leveling plate.

All the support bars are arranged on the middle line in the width direction of the first homogenizing plate, and the first homogenizing cavity is divided into two chambers of equal volume, and there are two adjacent supporting bars for communicating the two cavities. The first pitch of the chamber.

A second liquid leveling plate is also provided in the liquid distribution chamber, and the second liquid leveling plate is fixed to the lower casing. The second liquid leveling plate divides the liquid distribution chamber into a second liquid leveling chamber and a third liquid leveling chamber. One uniform liquid cavity is located in the second uniform liquid cavity.

A plurality of second homogenizing holes are arranged on the second homogenizing plate, and all the second homogenizing holes are evenly distributed on the second homogenizing plate, and the second homogenizing cavity and the third homogenizing cavity pass through the second homogenizing holes. Connected.

The projection of any second liquid equalizing hole on the lower case does not coincide with any first liquid ejecting hole.

The projection of each second liquid equalizing hole on the lower case is at the center position of a quadrangle formed by successively connecting the circle centers of four adjacent first liquid ejecting holes in sequence.

The upper edge of the second homogenizing plate is in contact with the upper sealing plate and sealed.

The edge of the second liquid equalizing plate is bent upward to form a flange, and the flange and the inner side of the lower case, the first bent portion and the upper sealing plate, and the second liquid equalizing plate and the lower case are all riveted.

The sum of the flow areas of all the second homogenizing holes is greater than the sum of the flow areas of all the first homogenizing holes.

The flow area of the liquid inlet, the sum of the flow areas of all the first liquid equalizing holes, the sum of the flow areas of all the second liquid equalizing holes, and the sum of the flow areas of all the first liquid venting holes increase in sequence.

The diameters of the first liquid equalizing hole, the second liquid equalizing hole and the first liquid ejecting hole range from 1 to 6 mm.

The liquid distributor also includes a liquid inlet pipe, which is welded or screwed to the liquid inlet.

A position where the edge of the first bent portion is in contact with the second bent portion is welded and sealed.

According to another aspect of the present disclosure, there is provided a heat exchanger including the liquid distributor described above.

A plurality of heat exchange tubes are arranged in the heat exchanger, and the liquid distributor is disposed above all the heat exchange tubes, and all the first liquid outlet holes are correspondingly arranged with the heat exchange tubes.

According to another aspect of the present disclosure, there is provided an air conditioning unit including the above-mentioned liquid distributor or the above-mentioned heat exchanger.

The liquid distributor, heat exchanger and air conditioner provided by the present disclosure can increase the assembly efficiency and accuracy by riveting the upper sealing plate and the lower casing, effectively prevent the liquid distributor from welding and deforming, and provide a first homogenizing liquid. The plate and the second liquid leveling plate can perform three liquid leveling on the liquid distributor, which can ensure that the refrigerant entering the liquid distributor is evenly distributed in the axial direction and the radial direction, and ensure the liquid distribution effect of the liquid distributor.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of an embodiment of a liquid distributor provided by the present disclosure;

2 is a schematic structural diagram of a first liquid leveling plate and an upper sealing plate in an embodiment of a liquid distributor provided by the present disclosure;

FIG. 3 is a half cross-sectional view of an embodiment of a liquid dispenser provided by the present disclosure.

In the picture:

1. Upper sealing plate; 2. Lower casing; 3. Liquid distribution chamber; 12. Liquid inlet; 22. First liquid outlet; 21. First bending portion; 11. Second bending portion; 4. First homogenizing plate; 41, first homogenizing hole; 5, support bar; 6, second homogenizing plate; 61, second homogenizing hole; 32, second homogenizing cavity; 33, third homogenizing cavity .

detailed description

In order to make the objectives, technical solutions, and advantages of the present disclosure more clear, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

The liquid distributor shown in FIG. 1 to FIG. 3 includes an upper sealing plate 1 and a lower casing 2. The upper sealing plate 1 is disposed on an upper portion of the lower casing 2 and forms a liquid distribution chamber 3 together with the lower casing 2, and The edge of the lower case 2 is bent toward the outside of the liquid distribution chamber 3 to form a first bent portion 21. The first bent portion 21 is fixedly disposed with the upper sealing plate 1. By adopting a riveting arrangement, welding deformation of the liquid distributor can be effectively prevented, thereby increasing the reliability of the liquid distributor structure.

The upper sealing plate 1 is provided with a liquid inlet 12 communicating with the cloth liquid cavity 3, and the refrigerant enters the cloth liquid cavity 3 through the liquid inlet 12 and leaves the cloth liquid cavity 3 through the first liquid outlet hole 22, so as to reach the refrigerant. The effect of sharing.

The edge of the upper sealing plate 1 protrudes from the first bent portion 21 and bends in the direction of the liquid distribution chamber 3 to form a second bent portion 11. The length of the second bent portion 11 is greater than the thickness of the first bent portion 21. When the refrigerant leaks slightly, the leaked refrigerant will not be sprayed in the direction of the upper sealing plate 1 away from the liquid distribution chamber 3, which effectively prevents the refrigerant from flowing out of the liquid discharge direction, causing a problem of suction and liquid.

The liquid distributor further includes a first liquid leveling plate 4, a first liquid leveling hole 41 is provided on the first liquid leveling plate 4, and the first liquid leveling plate 4 is disposed in the liquid distribution chamber 3 and sealed with the upper sealing plate 1. The first homogenization chamber 31 is formed. After the refrigerant passes through the first homogenization chamber 31 and is homogenized, the refrigerant is homogenized again through the first liquid outlet 22 to achieve the effect of secondary homogenization and increase the effect of homogenization.

All the first liquid equalizing holes 41 are distributed on the first liquid equalizing plate 4 in at least two rows. The arrangement of the first liquid equalizing holes 41 is arranged along the width direction of the first liquid equalizing plate 4 to increase the first uniform liquid. Liquid leveling effect of the liquid plate 4 in the width direction.

The area of all the first liquid equalizing holes 41 and the cross-sectional area (flow area) of the liquid inlet 12 are greater than that to ensure that the refrigerant entering the liquid distribution chamber 3 can be completely discharged from the first liquid equalizing hole 41, preventing the refrigerant from flowing in the liquid distributing chamber 3 memory retention, reducing the effect of homogenization.

The projection of the center of the liquid inlet 12 on the first liquid leveling plate 4 is located at the center line in the length direction of the first liquid leveling plate 4, so that the refrigerant entering through the liquid inlet 12 can flow uniformly to the inside of the liquid leveling cavity.

The width of the first liquid leveling plate 4 gradually decreases from the middle of the first liquid leveling plate 4 to both ends of the first liquid leveling plate 4, and the circle center line of the first liquid leveling holes 41 in the same row is parallel to the first The corresponding edges of the liquid plate 4 use the oblique sides of the first liquid homogenizing plate 4 to gather liquid refrigerant, which can increase the liquid homogenizing effect of the refrigerant in the width direction of the first liquid homogenizing plate 4. Preferably, the first liquid homogenizing plate 4 Rhombus structure.

The liquid distributor further includes at least one support bar 5. The upper end of the support bar 5 is disposed on the upper sealing plate 1, and the lower end of the support bar 5 is fixedly disposed on the first liquid leveling plate 4. The support bar 5 can ensure the first liquid leveling. The distance between the plate 4 and the upper sealing plate 1 ensures the connection strength between the first liquid leveling plate 4 and the upper sealing plate 1.

All the support bars 5 are arranged on the center line in the width direction of the first liquid leveling plate 4, and the first liquid leveling chamber 31 is divided into two chambers of equal volume. A first distance connecting the two chambers.

A second liquid leveling plate 6 is also provided in the liquid distribution chamber 3, and the second liquid leveling plate 6 is fixedly disposed with the lower casing 2. The second liquid leveling plate 6 divides the liquid distribution chamber 3 into a second liquid leveling chamber 32 and The third homogeneous liquid cavity 33 and the first homogeneous liquid cavity 31 are located in the second homogeneous liquid cavity 32. By using a riveting arrangement, a stable connection between the second homogenized plate 6 and the lower casing 2 can be ensured, and the refrigerant can be sequentially turned on. After passing through the liquid inlet 12, the first liquid equalization chamber 31, the second liquid equalization chamber 32, and the third liquid equalization chamber 33, it flows out from the first liquid outlet.

In particular, the width of the second homogenizing plate 6 is greater than the width of the first homogenizing plate 4, so that the first homogenizing plate 4 can increase the degree of liquid homogeneity of the refrigerant in the length direction of the homogenizing cavity, and the second homogenizing plate is used. The liquid plate 6 increases the degree of liquid homogenization of the refrigerant in the width direction of the liquid homogenizing cavity, and guarantees the liquid homogenizing effect on the premise that the liquid homogenizing effect is achieved three times.

The second homogenizing plate 6 is provided with a plurality of second homogenizing holes 61, and all the second homogenizing holes 61 are evenly distributed on the second homogenizing plate 6, and the second homogenizing chamber 32 and the third homogenizing chamber 33 The second homogenizing hole 61 communicates, and the second homogenizing hole 61 is used to increase the effect of once homogenizing.

The projection of any second liquid equalizing hole 61 on the lower casing 2 does not coincide with any first liquid ejecting hole 22, preventing the refrigerant passing through the second liquid equalizing hole 61 from flowing directly from the first liquid ejecting hole 22 to reduce the uniformity.液效应。 Liquid effect.

Preferably, the projection of each second liquid equalizing hole 61 on the lower casing 2 is at the center position of a quadrangle formed by successively connecting the circle centers of four adjacent first liquid outlet holes 22 in sequence.

The upper edge of the second liquid leveling plate 6 is in contact with the upper sealing plate 1 to seal, and the sealing performance of the liquid distribution chamber 3 is increased.

The edge of the second liquid equalizing plate 6 is bent upward to the sealing plate 1 to form a hemming edge, the edge is connected to the inner side of the lower casing 2, the first bent portion 21 and the upper sealing plate 1, and the second liquid equalizing plate 6 and the lower casing. The bodies 2 are all riveted, and at the same time, the riveted portion of the second liquid leveling plate 6 and the lower casing 2 is on the hem.

The sum of the flow areas of all the second liquid equalization holes 61 is larger than the sum of the flow areas of all the first liquid equalization holes 41.

Sum of the flow area of the liquid inlet 12, the sum of the flow areas of all the first liquid equalization holes 41, the sum of the flow areas of all the second liquid equalization holes 61, and the sum of the flow areas of all the first liquid discharge holes 22 Increase in order.

The diameters of the first liquid equalization hole 41, the second liquid equalization hole 61, and the first liquid discharge hole 22 range from 1 to 6 mm.

The liquid distributor also includes a liquid inlet pipe, which is welded or screwed to the liquid inlet 12.

When the seal strength of the liquid distributor is insufficient, the edge of the first bent portion 21 and the second bent portion 11 are welded and sealed, and intermittent welding can be used for welding.

A heat exchanger includes the liquid distributor described above.

A plurality of heat exchange tubes are arranged in the heat exchanger. The liquid distributor is disposed above all the heat exchange tubes, and all the first liquid outlet holes 22 are correspondingly arranged with the heat exchange tubes.

An air conditioning unit includes the above-mentioned liquid distributor or the above-mentioned heat exchanger.

The above embodiments only express several implementation manners of the present disclosure, and the descriptions thereof are more specific and detailed, but cannot be understood as limiting the scope of patents of the present disclosure. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, which all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the appended claims.

Claims

A liquid distributor includes an upper sealing plate (1) and a lower casing (2). The upper sealing plate (1) is disposed on an upper portion of the lower casing (2) and is connected to the lower casing (2). The liquid distribution cavity (3) is collectively enclosed, and the edge of the lower casing (2) is bent to the outside of the liquid distribution cavity (3) to form a first bending portion (21), and the first bending portion (21) It is fixedly arranged with the upper sealing plate (1), and the first casing (2) is provided with a first liquid outlet (22).
The liquid distributor according to claim 1, wherein the upper sealing plate (1) is provided with a liquid inlet (12) that communicates with the liquid distributor (3).
The liquid dispenser according to claim 1, wherein an edge of the upper sealing plate (1) protrudes from the first bent portion (21) and is bent in a direction close to the first bent portion (21). A second bent portion (11) is formed, and the length of the second bent portion (11) is greater than the thickness of the first bent portion (21).
The liquid distributor according to claim 2, wherein the liquid distributor further comprises a first liquid leveling plate (4), and the first liquid leveling plate (4) is provided with a first liquid leveling hole (41) The first liquid leveling plate (4) is disposed in the liquid distribution chamber (3) and forms a first liquid leveling cavity (31) with the upper sealing plate (1).
The liquid distributor according to claim 4, wherein the area of all of the first liquid equalizing holes (41) and the area of the liquid inlet (12) are larger.
The liquid distributor according to claim 4, wherein a projection of a circle center of the liquid inlet (12) on the first liquid leveling plate (4) is at a length of the first liquid leveling plate (4) Midline of the direction.
The liquid distributor according to claim 4, wherein the width of the first liquid leveling plate (4) is from the middle of the first liquid leveling plate (4) to the width of the first liquid leveling plate (4). The ends gradually decrease.
The liquid distributor according to claim 4 or 7, wherein the circle center line of the first liquid equalizing holes (41) in the same row is parallel to the corresponding edge of the first liquid equalizing plate (4).
The liquid dispenser according to claim 4, wherein the liquid dispenser further comprises at least one support bar (5), and an upper end of the support bar (5) is provided on the upper sealing plate (1), so that The lower end of the support bar (5) is fixedly disposed on the first homogenizing plate (4).
The liquid distributor according to claim 9, wherein all the support bars (5) are disposed on a center line in the width direction of the first liquid leveling plate (4), and the first liquid leveling chamber is (31) Divided into two chambers of equal volume.
The liquid dispenser according to claim 10, wherein there is a first distance between two adjacent support bars (5) for communicating the two chambers.
The liquid distributor according to claim 4, wherein a second liquid equalizing plate (6) is further provided in the liquid distributing chamber (3), and the second liquid equalizing plate (6) and the lower casing (2) It is fixedly arranged, and the second liquid leveling plate (6) divides the cloth distribution cavity (3) into a second liquid leveling cavity (32) and a third liquid leveling cavity (33). The liquid-homing chamber (31) is located in the second liquid-homing chamber (32).
The liquid distributor according to claim 12, wherein the second liquid leveling plate (6) is provided with a plurality of second liquid leveling holes (61), the second liquid leveling chamber (32) and the The third homogenizing cavity (33) communicates through the second homogenizing hole (61).
The liquid distributor according to claim 13, wherein a projection of any one of the second liquid-equalizing holes (61) on the lower casing (2) and any one of the first liquid-emitting holes (22) Neither overlap.
The liquid distributor according to claim 13, wherein the projection of each of the second liquid equalizing holes (61) on the lower casing (2) is located at four adjacent first liquid discharging holes ( 22) The center position of the quadrangle formed by the circle centers connected in sequence.
The liquid distributor according to claim 12, wherein an edge of the second liquid leveling plate (6) is bent toward the upper sealing plate (1) to form a folded edge, and an upper edge of the folded edge and the edge The upper sealing plate (1) is abutted and sealed.
The liquid distributor according to claim 12, wherein an edge of the second liquid leveling plate (6) is bent toward the upper sealing plate (1) to form a fold, and the fold and the lower casing The inner side surface of (2), the first bent portion (21), the upper sealing plate (1), the second liquid equalizing plate (6), and the lower case (2) are all riveted.
The liquid distributor according to claim 13, wherein the sum of the areas of all the second homogenizing holes (61) is larger than the sum of the areas of all the first homogenizing holes (41).
The liquid distributor according to claim 13, wherein the area of the liquid inlet (12), the sum of the areas of all the first liquid equalizing holes (41), and all of the second liquid equalizing holes (61) ) And the sum of the areas of all the first liquid discharge holes (22) increase in sequence.
The liquid distributor according to claim 13, wherein the diameter size range of the first liquid equalizing hole (41), the second liquid equalizing hole (61), and the first liquid outlet hole (22) is 1mm ~ 6mm.
The liquid distributor according to claim 2, wherein the liquid distributor further comprises a liquid inlet pipe, which is welded or screwed to the liquid inlet (12).
The liquid distributor according to claim 3, wherein a position where an edge of the first bent portion (21) contacts the second bent portion (11) is welded and sealed.
A heat exchanger comprising the liquid distributor according to any one of claims 1 to 22.
The heat exchanger according to claim 23, wherein a plurality of heat exchange tubes are disposed in the heat exchanger, the liquid distributor is disposed above all the heat exchange tubes, and all the first outlets A liquid hole (22) is provided corresponding to the heat exchange tube.
An air conditioning unit includes the liquid distributor according to any one of claims 1 to 22 or the heat exchanger according to claim 23 or 24.