CN114001498A

CN114001498A - Liquid blocking structure, heat exchanger and air conditioner

Info

Publication number: CN114001498A
Application number: CN202111335430.5A
Authority: CN
Inventors: 胡海利; 赵宇航; 卢杏斌; 王小勇
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-02-01

Abstract

The invention discloses a liquid blocking structure, a heat exchanger and an air conditioner, comprising: the heat exchange coil comprises a shell, an inner shell arranged in the shell and used for covering the heat exchange coil, wherein an air channel region is formed in a gap between the shell and the inner shell, a refrigerant outlet is formed in the upper portion, corresponding to the air channel region, of the shell, and a liquid blocking assembly is arranged in the air channel region. The invention adopts multilayer inner coil type heat exchange tubes, the heat exchange tubes in the falling film area are covered by a cylinder, an annular space is formed between the cylinder and the shell, gaseous refrigerant is discharged upwards from the surrounding annular area, a liquid blocking structure and a filter screen device are arranged between the inner shell and the shell, the liquid blocking device is impacted by inertia to separate splashed liquid drops when gas flows upwards, and the liquid drops flow into the liquid filling area under the action of gravity, thereby preventing the gas suction of a compressor from carrying liquid, enhancing the heat exchange performance of a unit and realizing the saving of refrigerant filling amount.

Description

Liquid blocking structure, heat exchanger and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a liquid blocking structure, a heat exchanger and an air conditioner.

Background

With the continuous progress of society, the demand of commercial air conditioners is more and more, and simultaneously, the user demand is various, all has very high requirement to the performance, size, quality and the cost of heat exchanger. The compact heat exchanger that appears in the existing market has some general problems, and wherein the gaseous refrigerant flow field is most mainly disorderly, causes the liquid phenomenon of the suction belt of compressor easily, and then leads to heat exchanger heat exchange efficiency not high, and the unit performance is unsatisfactory.

Disclosure of Invention

The invention provides a liquid blocking structure, a heat exchanger and an air conditioner, aiming at solving the technical problem that air suction and liquid carrying are caused when an air conditioning system operates in the prior art.

The technical scheme adopted by the invention is as follows:

the invention provides a liquid blocking structure, which comprises: the heat exchanger comprises a shell, an inner shell arranged in the shell and used for covering the heat exchange coil, wherein a gap between the shell and the inner shell forms an air channel area surrounding the inner shell, a refrigerant outlet is arranged at the upper part of the shell corresponding to the air channel area, and a liquid blocking assembly is arranged in the air channel area.

Preferably, the shell is a cylinder body which is closed up and down, the inner shell is an inner cylinder which is communicated up and down, the top of the inner cylinder is connected with the top of the cylinder body, the top of the shell is provided with a refrigerant inlet, and the refrigerant inlet is communicated with an area surrounded by the inner cylinder.

In one embodiment, a liquid stop assembly comprises: the first liquid baffle plate is connected between the bottom of the inner barrel and the inner wall of the barrel body, and a plurality of air guide holes are formed in the first liquid baffle plate. The diameter of the first liquid baffle is gradually enlarged from top to bottom, and a gap is reserved between the first liquid baffle and the inner wall of the cylinder.

In another embodiment, a liquid stop assembly comprises: the first liquid baffle is connected between the bottom of the inner barrel and the inner wall of the barrel, the diameter of the first liquid baffle is gradually enlarged from top to bottom, and a gap is reserved between the first liquid baffle and the inner wall of the barrel.

The liquid blocking assembly further comprises: and the second liquid baffle is connected with the inner wall of the outer barrel and is bent downwards around the inner edge of the inner barrel for a circle of second folded edge.

If the liquid blocking assembly further comprises: and the edge of the third liquid baffle is bent downwards to form a circle of third folded edge.

Furthermore, one third liquid baffle and one second liquid baffle form a group of liquid baffle groups, the second liquid baffle and the third liquid baffle in each group of liquid baffle groups are arranged at intervals, and the second liquid baffle is located above the third liquid baffle. And the liquid blocking surfaces of the second liquid blocking plate and the third liquid blocking plate incline downwards.

The flow equalizing plate is arranged inside the inner shell and is positioned between the refrigerant inlet and the heat exchange coil.

Furthermore, a filter screen device is arranged in the air passage area and is positioned above the liquid blocking assembly.

The invention also provides a heat exchanger which comprises the liquid retaining structure.

The heat exchanger specifically includes: the heat exchanger comprises a first heat exchange coil arranged on the inner shell and a second heat exchange coil arranged in the outer shell and positioned below the inner shell.

The invention also comprises an air conditioner comprising the heat exchanger.

Compared with the prior art, the invention adopts the coiled heat exchange tubes in multiple layers, the heat exchange contact area between the refrigerant and the heat exchange tubes is increased, and the evaporated gas flows downwards from the central air passage space of the inner coiled heat exchange tube bundle, so that the gas flow is smoother and the resistance is smaller; the heat exchanger is internally provided with a film falling area and a liquid full area, a heat exchange tube of the film falling area is covered by a tube body, an annular space is formed between the tube body and the shell, gaseous refrigerants are upwards discharged from the surrounding annular area, a liquid blocking structure and a filter screen device are arranged between the inner body and the shell, the liquid blocking device is impacted by inertia to separate splashed liquid drops when gas flows upwards, the liquid drops flow into the liquid full area under the action of gravity, the gas absorption and liquid carrying of the compressor are prevented, the heat exchange performance of the unit is enhanced, and the refrigerant filling amount can be saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a first liquid baffle according to an embodiment of the present disclosure;

fig. 3 is a schematic perspective view of a second liquid baffle according to an embodiment of the invention;

fig. 4 is a schematic perspective view of a third liquid baffle in the embodiment of the present invention.

1. A barrel; 11. a refrigerant inlet; 12. a refrigerant outlet;

2. an inner barrel; 31. a first liquid baffle; 32. a second liquid baffle; 33. a third liquid baffle; 4. a first heat exchange coil; 5. a second heat exchange coil; 6. a filter screen device; 7. and (4) a liquid homogenizing plate.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention 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 merely illustrative of the invention and are not intended to limit the invention.

The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.

As shown in fig. 1, the present invention provides a liquid blocking structure, including: casing and inner shell, inner shell setting are in the casing, and inner shell internally mounted heat exchange coil, and the inner shell covers heat exchange coil promptly, and the annular spacer between casing and the inner shell forms the air flue region, and corresponds the regional upper portion of air flue on the casing and be equipped with refrigerant export 12, and the refrigerant flows upwards along the air flue and flows out from refrigerant export 12 again promptly, is equipped with in the air flue region and keeps off the liquid subassembly. Liquid refrigerant that can be with the gaseous state refrigerant that will flow out the casing in the liquid blocking component mixes keeps off, utilize inertia and action of gravity, the liquid droplet that splashes is kept off in the refrigerant striking liquid blocking component, gaseous state refrigerant after the separation leaves the casing through refrigerant export 12 on casing upper portion, liquid refrigerant leaves the liquid full district along the inner wall of casing or the outer wall of inner shell, carry out the heat transfer with the coil pipe that the liquid full district set up, the heat exchange efficiency is improved, thereby effectively prevent that the refrigerant after the evaporation from wrapping up in by the hand the liquid droplet and flowing out from refrigerant export 12.

As shown in fig. 1, in a specific embodiment, the housing is a cylinder 1 which is closed up and down, the inner shell is an inner cylinder 2 which is through up and down, the top of the inner cylinder 2 is connected with the inner wall of the top of the cylinder 1, and the top of the housing is provided with a refrigerant inlet 11 which can input a refrigerant into the housing, the refrigerant inlet 11 is communicated with the area surrounded by the inner cylinder 2, the area surrounded by the inner cylinder 2 is a falling film area, a first heat exchange coil 4 is arranged in the falling film area, when the air conditioning unit operates, the liquid refrigerant drips and is sprayed on the multilayer inner-disc heat exchange tubes (the first heat exchange coil 4) in the falling film area for heat exchange and evaporation, and the gaseous refrigerant leaves the falling film area through the central air passage in the middle of the first heat exchange coil 4. The lower part of the inner barrel 2 in the shell is a liquid full area, a second heat exchange coil pipe 5 is arranged in the liquid full area, and the refrigerant which is not subjected to sufficient heat exchange evaporation flows to the liquid full area to perform secondary heat exchange, so that the heat exchange efficiency is enhanced.

Still be equipped with in the inner tube 2 and all liquid board 7, evenly be provided with on it and all liquid holes, all liquid board 7 is the setting of circular slice level, and is unanimous with the internal diameter of inner tube 2, connects the inner wall of inner tube 2 to lie in between first heat transfer coil 4 and the barrel 1 top, make the refrigerant that gets into inner tube 2 from refrigerant entry 11 evenly flow downwards, improve heat exchange efficiency.

It should be noted that, the first and second heat exchange coil pipes 5 adopt a novel multi-layer inner disc structure, and an air passage space is reserved at the center, so that not only can the contact area of the refrigerant be increased, but also the shell space can be saved. The liquid level height of the liquid full area is about 3-15mm higher than the height of the heat exchange tube of the liquid full area, the preferred height is 5mm, the flow velocity of the gaseous refrigerant is prevented from being too fast, the diameter of the inner tube 2 is smaller than the diameter of the shell of the heat exchanger (namely the diameter difference value of the tube body 1 and the inner tube 2), the flow velocity is controlled to be 200mm, through analysis of a gas flow field and the flow velocity, the optimal scheme is 150mm, the flow velocity of the gaseous refrigerant can be prevented from being too fast, and the heat exchange efficiency can be improved.

Keep off liquid subassembly includes specifically: first fender liquid board 31, second fender liquid board 32 and third fender liquid board 33, first fender liquid board 31 sets up in the bottom of inner tube 2, connects and be the annular between the bottom of inner tube 2 outer wall and the inner wall of barrel 1, evenly sets up on the first fender liquid board 31 and is equipped with a plurality of air guide holes, and first fender liquid board 31 is regional for annular air flue to the region between the 1 top of barrel, and the gas refrigerant of smuggleing secretly the liquid drop after the heat transfer from the liquid-full district gets into the air flue region from the air guide hole.

In a preferred embodiment, as shown in fig. 2, the first liquid baffle 31 may be tapered (i.e. the diameter of the first liquid baffle 31 gradually increases from top to bottom), the inner edge is welded to the bottom of the inner body of the falling film region, and a gap is reserved between the outer edge and the inner wall of the cylinder 1, so that the separated liquid drops can conveniently flow back to the full liquid region, and a dead flow region outside the opening is prevented. And fully opening air guide holes on the liquid baffle plate, considering the relation between the relative open hole area and the total area ratio of the annular air passage, the liquid level height of a full liquid area and the air flow flowing track, and simultaneously ensuring that the open holes have an air equalizing effect, wherein the diameter of the open holes is controlled to be 10-20mm, preferably 16 mm. The angle C between the conical first liquid baffle 31 and the axial center line of the shell is controlled to be 40-75 degrees, and the preferred angle is 55 degrees.

As shown in fig. 3 and 4, the second baffle 32 and the third baffle 33 are both annular (the annular has a circle of circular inner edge with a small diameter and a circle of circular outer edge with a large diameter), and one third baffle 33 and one second baffle 32 form a group of baffle groups. The two liquid baffle plates form a liquid baffle plate group which can play a role of supplementing each other, and in order to meet the best liquid baffle effect and the welding process requirements, the distance between the upper surfaces of the two baffle plates in one liquid baffle plate group is controlled to be 30mm-80mm, and the preferred distance is 45 mm.

The second liquid baffle 32 is connected with the inner wall of the outer barrel, and the second liquid baffle 32 is bent downwards around the inner edge of the inner barrel 2 for a circle of second folded edge; the third liquid baffle 33 is connected with the outer wall of the inner barrel 2, the edge of the third liquid baffle 33 is bent downwards for a circle of third folded edge, the second liquid baffle 32 and the third liquid baffle 33 in each group of liquid baffle groups are arranged at intervals, and the second liquid baffle 32 is positioned above the third liquid baffle 33. Through setting up multiunit baffle group, make the regional many times of turning to of air flue to and be convenient for the liquid drop through the hem and fall.

In order to ensure that separated liquid drops can flow downwards more smoothly, the upper surfaces of the first liquid baffle and the second liquid baffle are inclined relative to the inner wall of the barrel body, the specific size of the angle a is controlled to be 5-15 degrees, the preferred angle is 8 degrees, the angles of the folded edges of the first liquid baffle and the second liquid baffle and the upper surfaces of the first liquid baffle and the second liquid baffle are oblique angles b, the structure utilizes the function of section mutation to be beneficial to enhancing the liquid baffle effect, the oblique angles b are controlled to be about 70-85 degrees, the optimal angle is 81 degrees, the straight edge lengths (namely the straight line distance from the inner edge to the outer edge) of the first liquid baffle and the second liquid baffle are kept consistent and are controlled to be 75-110 mm, and the optimal length is 90 mm.

The air passage area is further provided with a filter screen device 6, in particular a filter screen, for filtering liquid droplets. The filter screen device 6 is located the fender liquid subassembly top, is located between the fender liquid board group and the refrigerant export of the top promptly, and the filter screen device is the annular, further prevents that the liquid droplet from the refrigerant export outflow.

The invention also provides a heat exchanger, in particular to a falling film heat exchanger, which comprises the liquid blocking structure, wherein the heat exchanger comprises a first heat exchange coil 4 arranged in the inner shell, a second heat exchange coil 5 arranged in the outer shell and positioned below the inner shell, and inlet and outlet pipelines of the first heat exchange coil and the second heat exchange coil penetrate out of the shell and the side surface of the inner shell.

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

Above embodiment, both can save heat exchanger occupation space and refrigerant perfusion volume, can reduce the suction simultaneously again and take the liquid phenomenon, strengthen heat transfer performance to compact structure has improved space utilization.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A liquid-stopping structure comprising: the heat exchanger comprises a shell and an inner shell, wherein the inner shell is arranged in the shell and used for covering the heat exchange coil, the heat exchanger is characterized in that a gap between the shell and the inner shell forms an air channel area surrounding the inner shell, a refrigerant outlet is arranged at the upper part of the shell corresponding to the air channel area, and a liquid blocking assembly is arranged in the air channel area.

2. The liquid blocking structure of claim 1, wherein the housing is a cylinder body which is closed up and down, the inner shell is an inner cylinder which is through up and down, the top of the inner cylinder is connected with the top of the cylinder body, the top of the housing is provided with a refrigerant inlet, and the refrigerant inlet is communicated with a region surrounded by the inner cylinder.

3. The fluid stop structure of claim 2, wherein the fluid stop assembly comprises: the first liquid baffle plate is connected between the bottom of the inner barrel and the inner wall of the barrel body, and a plurality of air guide holes are formed in the first liquid baffle plate.

4. The fluid stop structure of claim 2, wherein the fluid stop assembly comprises: the first liquid baffle is connected between the bottom of the inner barrel and the inner wall of the barrel, the diameter of the first liquid baffle is gradually enlarged from top to bottom, and a gap is reserved between the first liquid baffle and the inner wall of the barrel.

5. The fluid stop structure of claim 2, wherein the fluid stop assembly comprises: and the second liquid baffle is connected with the inner wall of the outer barrel and is bent downwards around the inner edge of the inner barrel for a circle of second folded edge.

6. The fluid stop structure of claim 5, wherein the fluid stop assembly further comprises: and the edge of the third liquid baffle is bent downwards to form a circle of third folded edge.

7. The fluid retention structure of claim 6, wherein one of the third fluid retention plates and one of the second fluid retention plates comprise a set of fluid retention plates, wherein the second fluid retention plate and the third fluid retention plate in each set of fluid retention plates are spaced apart, and wherein the second fluid retention plate is positioned above the third fluid retention plate.

8. The liquid retaining structure of claim 6, wherein the liquid retaining surfaces of the second liquid retaining plate and the third liquid retaining plate are inclined downward.

9. The liquid blocking structure of claim 1, wherein a flow equalizing plate is disposed inside the inner shell, and the flow equalizing plate is located between the refrigerant inlet and the heat exchanging coil.

10. The fluid shield of claim 1 wherein said airway region is further provided with a screen means, said screen means being positioned above said fluid shield assembly.

11. A heat exchanger characterized by comprising the liquid-stopping structure as recited in any one of claims 1 to 10.

12. The heat exchanger of claim 11, comprising: the heat exchanger comprises a first heat exchange coil arranged on the inner shell and a second heat exchange coil arranged in the outer shell and positioned below the inner shell.

13. An air conditioner characterized by comprising the heat exchanger according to any one of claims 11 to 12.