CN113883754A - Tank evaporator and air conditioner - Google Patents
Tank evaporator and air conditioner Download PDFInfo
- Publication number
- CN113883754A CN113883754A CN202111173179.7A CN202111173179A CN113883754A CN 113883754 A CN113883754 A CN 113883754A CN 202111173179 A CN202111173179 A CN 202111173179A CN 113883754 A CN113883754 A CN 113883754A
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- Prior art keywords
- gas
- liquid separation
- evaporator
- liquid
- separation structure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
- F25B2339/021—Evaporators in which refrigerant is sprayed on a surface to be cooled
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a tank evaporator and an air conditioner, relates to the technical field of air conditioners and solves the technical problem that in a membrane lowering area of the tank evaporator in the prior art, evaporated gaseous refrigerant interferes with the distribution of liquid refrigerant, so that the liquid distribution of a heat exchange tube in the tank evaporator is uneven. The invention provides a tank-type falling film evaporator, which is characterized in that a gas-liquid separation structure is arranged in a falling film area in the tank-type falling film evaporator, so that gaseous refrigerant can be discharged from the falling film area in time, the uniformity and stability of liquid distribution on the falling film area are effectively improved, and the heat exchange efficiency is effectively improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a tank-type evaporator and an air conditioner with the same.
Background
As shown in fig. 1, the tank-type falling-film evaporator generally comprises a shell, a gas guide pipe, a first liquid homogenizing plate, a second liquid homogenizing plate, an upper sealing plate, a lower sealing plate, a disc-type heat exchange pipe and other main parts. As shown in fig. 2, in the heat exchange process, a first liquid-equalizing plate is mainly used for uniformly distributing the refrigerant from the liquid inlet to the heat exchange tubes to form a layer of film, the refrigerant liquid film is in full contact with the surfaces of the heat exchange tubes and exchanges heat to be evaporated, a second liquid-equalizing plate is sometimes arranged for further ensuring the uniformity of liquid distribution, the refrigerant which is not evaporated in the first falling film region drops onto the second liquid-equalizing plate along the heat exchange tubes, the refrigerant further uniformly drops onto the heat exchange tubes in the second falling film region to be evaporated in a secondary falling film region, the gaseous refrigerant evaporated and converted in the falling film region is upwards discharged through the air duct, and the liquid refrigerant is gathered and dropped to the bottom of the heat exchanger to form a liquid-full region and is evaporated in a full liquid state.
Because the refrigerant can appear gas-liquid two-phase mixed refrigerant after evaporating in the falling film district, the gaseous refrigerant of evaporation is not in time discharged, has disturbed the distribution and the even drippage of liquid refrigerant, therefore how to improve cloth uniformity and the stability of liquid on the pot-type falling film evaporator and has become the problem that awaits a urgent need to be solved.
Disclosure of Invention
The invention aims to provide a tank evaporator and an air conditioner, and solves the technical problem that in a membrane lowering area of the tank evaporator in the prior art, evaporated gaseous refrigerant interferes with the distribution of liquid refrigerant, so that the liquid distribution of a heat exchange tube in the tank evaporator is uneven. 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 tank evaporator, which comprises a shell, a membrane lowering area formed in the shell, and a gas-liquid separation structure, wherein the gas-liquid separation structure is positioned in the membrane lowering area, and gaseous refrigerants separated by the gas-liquid separation structure in the membrane lowering area can be discharged through an exhaust port of the tank evaporator.
Further, the pot-type evaporator includes air duct and inner tube, the inner tube sets up in the air duct just the lateral wall of inner tube with there is the clearance between the inside wall of air duct, the air duct is located the regional air guide hole that distributes that falls the membrane district, the inner tube stretches into fall the membrane district, the air duct with the inner tube cooperatees in order to be used for forming the gas-liquid separation structure.
Furthermore, the inner cylinder is of a cylinder structure with openings at two ends, the axis of the inner cylinder is collinear with the axis of the air duct, and the inner cylinder is communicated with the exhaust port.
Furthermore, the bottom of the inner cylinder is provided with a filtering structure for filtering the refrigerant liquid drops.
Furthermore, the inner cylinder is provided with air passing holes, the air passing holes in the inner cylinder and the air guide holes in the air guide tube are arranged in a staggered mode, and gaseous refrigerants entering between the air guide tube and the inner cylinder can enter the inner cylinder through the air passing holes.
Furthermore, the inner side wall of the inner cylinder is provided with a filtering structure for filtering the refrigerant liquid drops.
Further, the diameter of the air guide hole is not more than 5 mm.
Further, the outer side wall of the inner barrel and/or the outer side wall of the air guide pipe are provided with groove structures for increasing the surface area.
Further, the groove structures are vertical grooves and are distributed at intervals along the circumferential direction of the inner barrel or the air guide pipe.
Further, the cross section of the groove structure is V-shaped, U-shaped or trapezoidal.
Furthermore, a liquid distribution area is formed in the shell, and the air guide holes are distributed in the area of the air guide pipe, which is located in the liquid distribution area.
The invention provides an air conditioner, which comprises the tank evaporator.
The invention provides a tank-type falling film evaporator, which is characterized in that a gas-liquid separation structure is arranged in a falling film area in the tank-type falling film evaporator, so that gaseous refrigerant can be discharged from the falling film area in time, the uniformity and stability of liquid distribution on the falling film area are effectively improved, and the heat exchange efficiency is effectively improved.
The preferred technical scheme of the invention can at least produce the following technical effects:
the outer side wall of the inner cylinder and/or the outer side wall of the gas guide tube are/is provided with a groove structure for increasing the surface area, and the groove structure increases the surface area of the gas-liquid mixed refrigerant impacting the gas guide tube or the inner cylinder, so that small liquid drops can be separated from the gaseous refrigerant, and the gas-liquid separation effect is improved;
the groove structure is a vertical groove, so that each groove structure can play a role in accelerating the diversion and dripping of the converged liquid drops.
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 cross-sectional view of a prior art can-type falling film evaporator;
FIG. 2 is a schematic cross-sectional view of a prior art can-type falling film evaporator (illustrating refrigerant flow direction);
FIG. 3 is a schematic cross-sectional view of a canister evaporator provided by an embodiment of the present invention;
FIG. 4 is a schematic sectional view taken along line B-B in FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 3 at C;
FIG. 6 is a schematic view of a configuration of an airway tube provided by an embodiment of the invention;
FIG. 7 is a schematic structural view of an inner barrel provided in an embodiment of the present invention;
FIG. 8 is another schematic structural view of an inner barrel according to an embodiment of the present invention;
FIG. 9 is a schematic view of another embodiment of the airway tube of the present invention;
FIG. 10 is a schematic top view of an airway tube provided by embodiments of the invention;
fig. 11 is a partial enlarged view at D in fig. 10.
FIG. 1-housing; 2-a gas-guide tube; 3-a membrane-lowering zone; 4-air vents; 5-inner cylinder; 6-a filter structure; 7-air passing holes; 8-a groove structure; 9-liquid distribution area; 10-an exhaust port; 11-a first homogenizing plate; 12-a second liquid homogenizing plate; 13-upper closing plate; 14-lower closing plate; 15-heat exchange tube; 16-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.
Referring to fig. 1 and 2, since a gas-liquid two-phase mixed refrigerant occurs after the refrigerant is evaporated in the falling film region, the evaporated gaseous refrigerant is not discharged in time, and the distribution and uniform dripping of the liquid refrigerant are disturbed. The invention provides a tank evaporator, aiming at solving the problems. The tank evaporator comprises a shell 1, a film falling region 3 is formed in the shell 1, the tank evaporator further comprises a gas-liquid separation structure, the gas-liquid separation structure is located in the film falling region 3, and gaseous refrigerants separated by the gas-liquid separation structure in the film falling region 3 can be discharged through an exhaust port 10 of the tank evaporator. According to the invention, the gas-liquid separation structure is arranged in the falling film area 3 in the pot-type falling film evaporator, so that gaseous refrigerant can be discharged from the falling film area in time, the uniformity and stability of liquid distribution on the falling film area are effectively improved, and the heat exchange efficiency is effectively improved.
The gas-liquid separation structure has the following specific structure: the tank evaporator comprises an air duct 2 and an inner barrel 5, the inner barrel 5 is arranged in the air duct 2, a gap exists between the outer side wall of the inner barrel 5 and the inner side wall of the air duct 2, the air duct 2 is located in a region of a membrane descending region 3, the inner barrel 5 extends into the membrane descending region 3, and the air duct 2 and the inner barrel 5 are matched with each other to form a gas-liquid separation structure. The air duct 2 is provided with an air guide hole 4, and the refrigerant passes through the air duct 2 to generate the functions of air equalization and liquid blocking; the gas guide holes 4 can discharge the gaseous refrigerant of the falling film area 3 in time, the gaseous refrigerant carries liquid phase components, the gaseous refrigerant further performs gas-liquid separation by impacting the inner cylinder 5, the liquid refrigerant separated from the outer wall surface of the inner cylinder 5 is gathered and dripped downwards under the action of gravity, and the separated gas refrigerant enters the inner cylinder 5 and is discharged through the exhaust port 10. The invention combines the structural characteristics of the tank evaporator, and the gaseous refrigerant can be discharged from the falling film area in time without increasing the volume of the tank evaporator by adding the inner cylinder 5 in the gas guide tube 2 and arranging the gas guide holes 4 on the gas guide tube 2. The distance between the outer sidewall of the inner tube 5 and the inner sidewall of the gas-guide tube 2 is limited according to the actual situation.
The separated gas refrigerant discharge method is specifically described as follows: the inner tube 5 is a cylinder structure with two open ends, the axis of the inner tube 5 is collinear with the axis of the air duct 2, see fig. 8, the inner tube 5 is shown (no hole is formed on the circumferential side wall of the inner tube 5 at this time), the upper end of the inner tube 5 is fixed on the upper closing plate 13, the lower end extends to the membrane lowering region 3, the refrigerant entering between the air duct 2 and the inner tube 5 can enter the inner part of the inner tube 5 through the bottom of the inner tube 5, and preferably, the bottom of the inner tube 5 is provided with a filtering structure 6, and the filtering structure 6 is used for filtering refrigerant liquid drops. After the gaseous refrigerant is further subjected to gas-liquid separation by impacting the inner cylinder 5, the separated refrigerant gas enters the inner cylinder 5 from the bottom of the inner cylinder 5 and flows upwards to discharge the exhaust port 10, and a filter screen structure 6 is arranged in the inner cylinder 5 to further perform precise separation on the gas-liquid two-phase refrigerant; the separated liquid refrigerant drops to the flooded area 16 by gravity, thereby improving heat exchange performance and gas-liquid separation efficiency.
The separated gas refrigerant discharge method may be as follows: the inner tube 5 is the cylinder structure of both ends open-ended and sets up on the inner tube 5 and crosses gas pocket 7, the axis of inner tube 5 and the axis collineation of air duct 2, see fig. 7, inner tube 5 has been illustrated, gas pocket 7 has been distributed on the circumference side of inner tube 5, cross gas pocket 7 on the inner tube 5 and air guide hole 4 dislocation set on the air duct 2, see fig. 4, the position relation of air guide hole 4 on the air duct 2 and air guide hole 7 on the inner tube 5 has been illustrated, gaseous state refrigerant gets into air guide hole 4 and can strike the region of not seting up gas pocket 7 on inner tube 5, form baffling fender liquid, play the gas-liquid separation effect, the refrigerant that gets into between air duct 2 and the inner tube 5 can get into the inside of inner tube 5 through gas pocket 7 and inner tube 5 bottom. Preferably, a filter structure 6 is disposed at the bottom of the inner cylinder 5 and the inner sidewall of the inner cylinder 5, and the filter structure 6 is used for filtering the refrigerant droplets. The filtering structure 6 further performs precise separation on the gas-liquid two-phase refrigerant; the separated liquid refrigerant drops to the flooded area 16 by gravity, thereby improving heat exchange performance and gas-liquid separation efficiency.
With respect to the length of the inner barrel 5, it is preferred that the bottom of the inner barrel 5 does not protrude beyond the bottom of the airway tube 2, and it is preferred that the bottom of the inner barrel 5 is adjacent the bottom of the airway tube 2.
As an alternative embodiment, the diameter of the air guide hole 4 is not more than 5mm, and the air guide hole 4 can be a round or square hole or a kidney-shaped hole, etc. The number and the size of the air guide holes 4 in the air guide pipe 2 determine the flow area, and the flow rate and the flow velocity of the refrigerant are required to be ensured within the range required by the unit. Similarly, if the inner cylinder 5 is provided with the air passing hole 7, the diameter of the air passing hole 7 is not more than 5mm, and the air passing hole 7 can be a circular hole, a square hole, a kidney-shaped hole or the like.
As an alternative embodiment, the outer sidewall of the inner barrel 5 and/or the outer sidewall of the airway tube 2 is provided with a groove structure 8 to increase the surface area. Referring to fig. 9, the gas guide tube 2 provided with the groove structure 8 is illustrated, and the groove structure 8 on the gas guide tube 2 increases the surface area of the gas-liquid mixed refrigerant impacting the gas guide tube 2, so as to facilitate separation of small liquid droplets from the gas refrigerant and increase the gas-liquid separation effect. Of course, it is also possible to provide the groove structure 8 on the outer surface of the inner cylinder 5.
As an optional implementation manner, the groove structures 8 are vertical grooves, each groove structure 8 can play a role in accelerating the diversion and dripping of the converged droplets, and the groove structures 8 can be uniformly distributed at intervals along the circumferential direction of the inner barrel 5 or the air duct 2. The cross section of the groove structure 8 is V-shaped, U-shaped, or trapezoidal, and the specific structure of the groove structure 8 is not limited. Referring to fig. 11, a groove structure 8 with a trapezoidal cross section is illustrated, at this time, the air guide holes 4 on the air guide tube 2 may be arranged at the bottom of the groove structure 8, each groove structure 8 is provided with the air guide holes 4, and a row of air guide holes 4 distributed at intervals are arranged in the groove structure 8 along a direction parallel to the axis of the air guide tube 4.
As optional implementation mode, the air duct 2 is located the regional gas vent 4 that distributes in cloth liquid district 9, gaseous refrigerant in the cloth liquid district 9 passes through gas vent 4 and gets into between air duct 2 and the inner tube 5, then get into the inside of inner tube 5 through the bottom of inner tube 5 (if the regional gas vent 7 that does not set up of inner tube 5 is located cloth liquid district 9), realize also forming gas-liquid separation structure in cloth liquid district 9, through gas-liquid separation structure, carry out gas-liquid separation earlier to the refrigerant that gets into in casing 1, can weaken the impact influence of gaseous refrigerant to liquid refrigerant by a wide margin, it is even to do benefit to cloth liquid, promote the cloth liquid effect on heat exchange tube surface, and then promote heat transfer effect.
An air conditioner comprises the tank evaporator provided by the invention. According to the invention, the gas-liquid separation structure is arranged in the falling film area 3 in the pot-type falling film evaporator, so that gaseous refrigerant can be discharged from the falling film area in time, the uniformity and stability of liquid distribution on the falling film area are effectively improved, and the heat exchange efficiency is effectively improved.
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 (12)
1. The pot-type evaporator comprises a shell (1), wherein a membrane lowering region (3) is formed in the shell (1), and the pot-type evaporator is characterized by further comprising a gas-liquid separation structure, the gas-liquid separation structure is located in the membrane lowering region (3), and gaseous refrigerants separated by the gas-liquid separation structure in the membrane lowering region (3) can be discharged through an exhaust port (10) of the pot-type evaporator.
2. The tank evaporator according to claim 1, which comprises a gas-liquid separation structure, wherein the gas-liquid separation structure is formed by matching the gas-liquid separation structure with the gas-liquid separation structure, the inner cylinder (5) is arranged in the gas-liquid separation structure, a gap is formed between the outer side wall of the inner cylinder (5) and the inner side wall of the gas-liquid separation structure (2), the gas-liquid separation structure is distributed with gas-liquid separation holes (4) on the region of the gas-liquid separation structure (2) located in the membrane descending region (3), and the inner cylinder (5) extends into the membrane descending region (3).
3. The canister evaporator according to claim 2, wherein the inner tube (5) is a cylindrical structure with both ends open, the axis of the inner tube (5) is collinear with the axis of the gas-guide tube (2), and the inner tube (5) is communicated with the gas outlet (10).
4. The can evaporator according to claim 2, wherein a filtering structure (6) for filtering refrigerant droplets is provided at a bottom of the inner tube (5).
5. The can evaporator according to claim 2, wherein the inner tube (5) is provided with air passing holes (7), the air passing holes (7) on the inner tube (5) and the air guide holes (4) on the air guide tube (2) are arranged in a staggered manner, and gaseous refrigerant entering between the air guide tube (2) and the inner tube (5) can enter the inner portion of the inner tube (5) through the air passing holes (7).
6. The can evaporator as recited in claim 5, wherein an inner sidewall of the inner tube (5) is provided with a filtering structure (6) for filtering refrigerant droplets.
7. The can evaporator according to claim 2, wherein the diameter of the air-guide holes (4) is not more than 5 mm.
8. The can evaporator according to any of claims 2-7, characterized in that the outer side wall of the inner drum (5) and/or the outer side wall of the gas duct (2) is provided with a groove structure (8) to increase the surface area.
9. The can evaporator according to claim 8, wherein the groove structures (8) are vertical grooves and the groove structures (8) are evenly spaced in the circumferential direction of the inner drum (5) or the gas-guide tube (2).
10. The can evaporator according to claim 8, characterized in that the groove structure (8) is V-shaped or U-shaped or trapezoidal in cross section.
11. The tank evaporator according to claim 2, characterized in that a liquid distribution zone (9) is formed in the housing (1), the gas ducts (2) being distributed over the area of the liquid distribution zone (9) over the gas-conducting apertures (4).
12. An air conditioner characterized by comprising the canister evaporator according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111173179.7A CN113883754A (en) | 2021-10-08 | 2021-10-08 | Tank evaporator and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111173179.7A CN113883754A (en) | 2021-10-08 | 2021-10-08 | Tank evaporator and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113883754A true CN113883754A (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111173179.7A Pending CN113883754A (en) | 2021-10-08 | 2021-10-08 | Tank evaporator and air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN113883754A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024078274A1 (en) * | 2022-10-12 | 2024-04-18 | 珠海格力电器股份有限公司 | Tank-type heat exchanger and air conditioning system |
-
2021
- 2021-10-08 CN CN202111173179.7A patent/CN113883754A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024078274A1 (en) * | 2022-10-12 | 2024-04-18 | 珠海格力电器股份有限公司 | Tank-type heat exchanger and air conditioning system |
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