CN114001497A - Liquid distribution device, heat exchanger and air conditioner - Google Patents
Liquid distribution device, heat exchanger and air conditioner Download PDFInfo
- Publication number
- CN114001497A CN114001497A CN202111334813.0A CN202111334813A CN114001497A CN 114001497 A CN114001497 A CN 114001497A CN 202111334813 A CN202111334813 A CN 202111334813A CN 114001497 A CN114001497 A CN 114001497A
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- liquid
- liquid distribution
- refrigerant
- distribution device
- barrel
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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
- 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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a liquid distribution device, a heat exchanger and an air conditioner, comprising: the liquid distribution device comprises a barrel, an inner barrel arranged in the barrel and a refrigerant outlet arranged at the upper part of the barrel, wherein one side of the barrel is provided with a refrigerant inlet, so that a refrigerant spirally flows along a liquid distribution space formed between the barrel and the inner barrel at intervals. The conical cylinder type liquid distribution device fully utilizes spiral flow centrifugal collision separation and secondary gravity settling separation at the inlet according to different gas-phase and liquid-phase densities in a refrigerant gas-liquid mixture, effectively intercepts a small amount of liquid drops carried in an upward airflow, and uniformly distributes liquid on the bottom of a single liquid-phase refrigerant. Compared with the pressurized gas-liquid two-phase common liquid distribution, the single-phase gravity liquid distributor which firstly separates gas and liquid and then uniformly distributes liquid has small liquid distribution pressure drop and more uniform refrigerant liquid distribution.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a liquid distribution device, a heat exchanger and an air conditioner.
Background
With the promotion of the green high-efficiency refrigeration action scheme, high-efficiency energy-saving equipment becomes the mainstream choice in the market. In a large commercial water chilling unit, a heat exchanger is used as a heart of system heat exchange, and the heat transfer performance of the heat exchanger seriously influences the heat transfer efficiency of the heat exchanger. In a commercial water chilling unit, a common evaporator comprises a dry evaporator, a flooded evaporator and a falling film evaporator, and the falling film evaporator is suitable for the development requirement of 'green and high efficiency' due to high heat exchange efficiency and low refrigerant consumption, and is gradually popularized and used by air-conditioning refrigeration equipment manufacturers.
The conventional horizontal tube falling film evaporator is mostly used in a large-sized water chiller, and the small-sized water chiller mostly adopts a spiral tube falling film type due to size and cost limitations. No matter it is horizontal pipe falling film or spiral pipe falling film, because its high-efficient evaporation heat transfer in the even liquid film that mainly forms on the heat exchange tube surface, the key factor that influences its heat transfer performance is the liquid film formation condition on heat exchange tube surface, more because the cloth membrane condition of liquid distributor direct influence top calandria all has great influence to the cloth membrane of whole tube bank, consequently, to falling liquid film heat exchanger liquid distributor design crucial, directly influenced the whole comprehensive properties of heat exchanger. The existing liquid distributor needs to be provided with an additional gas-liquid separation device, so that the required liquid distribution space is large, and the structure is not compact enough.
Disclosure of Invention
The invention provides a liquid distribution device, a heat exchanger and an air conditioner, aiming at solving the technical problem that the liquid distribution efficiency of a liquid distributor in the prior art is low.
The technical scheme adopted by the invention is as follows:
the invention provides a liquid distribution device, which comprises: the liquid distribution device comprises a shell and a liquid distribution assembly arranged in the shell, wherein a liquid distribution space surrounding the liquid distribution assembly is formed between the shell and the liquid distribution assembly, a refrigerant outlet is formed in the upper part of the shell, and a refrigerant inlet is formed in one side of the shell to enable a refrigerant to flow spirally along the liquid distribution space.
Furthermore, the shell is a cylinder body which is sealed up and down, the liquid distribution assembly comprises an inner cylinder which is arranged in the shell, and the inner cylinder is communicated up and down and is conical, so that the volume of the liquid distribution space is gradually reduced from top to bottom. The top of inner tube is equipped with the baffle, the periphery of baffle with the inner wall interval of barrel, the refrigerant export sets up the top of barrel. The bottom of inner tube with connect the equal liquid board between the barrel inner wall, it has the equal discharge orifice to all to have on the liquid board. A plurality of equal flowing hole is followed equal liquid board sets up at least round, and adjacent two interval department between the equal flowing hole is equipped with the lug, all depressed area links to each other between the lug and forms the intercommunication the runner of equal flowing hole.
Preferably, the number of the flow equalizing holes corresponds to the number of layers of the spiral pipe.
Furthermore, a spiral pipe used for exchanging heat with a refrigerant in the cylinder body is arranged below the inner cylinder.
Preferably, the refrigerant inlet has a refrigerant flow direction perpendicular to and offset from a central axis of the cylinder.
The invention also provides a heat exchanger which comprises the liquid distribution device.
The invention further provides an air conditioner which comprises the heat exchanger.
Compared with the prior art, the conical cylinder type liquid distribution device fully utilizes spiral flow centrifugal collision separation (also called inertia separation) and secondary gravity settling separation at the inlet according to different gas-phase and liquid-phase densities in a refrigerant gas-liquid mixture, effectively intercepts a small amount of liquid drops carried in an upward gas flow, and uniformly distributes liquid on the bottom of a single liquid-phase refrigerant. Compared with the pressurized gas-liquid two-phase common liquid distribution, the single-phase gravity liquid distributor which firstly separates gas and liquid and then uniformly distributes liquid has small liquid distribution pressure drop and more uniform refrigerant liquid distribution.
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 perspective view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a liquid dispensing assembly according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view of a heat exchange coil according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a liquid homogenizing plate according to an embodiment of the present invention;
FIG. 6 is a schematic front view of a liquid-uniforming plate according to an embodiment of the present invention;
FIG. 7 is a schematic view of a back structure of a liquid-uniforming plate according to an embodiment of the present invention;
1. a barrel; 2. a water side inlet; 3. a water side outlet; 4. an upper cover plate; 5. a refrigerant outlet; 6. a refrigerant inlet; 7. a lower cover plate; 8. a heat exchange coil; 9. a liquid distribution assembly; 91. an inner barrel; 91. a liquid homogenizing plate; 92. an inner barrel; 93. a baffle plate; 911. a first bump; 913. An outer ring flow equalizing hole; 914. an annular flow passage; 915. the inner ring is provided with flow equalizing holes; 916. and a second bump.
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 to 4, the present invention provides a liquid distribution device, including: the shell is a cylindrical barrel body 1, the top and the bottom of the barrel body 1 are sealed, a refrigerant outlet 5 is arranged at the top, and the shell can be connected with an air outlet pipe. The liquid distribution assembly 9 comprises an inner cylinder 92 arranged in the cylinder 1, the inner cylinder 92 and the cylinder 1 are coaxially arranged, a ring-shaped interval area is formed between the inner cylinder 92 and the cylinder 1, a refrigerant inlet 6 is arranged at one side of the cylinder 1 corresponding to the height of the interval area, a liquid distribution space is formed in the interval area between the inner cylinder 92 and the cylinder 1, a refrigerant entering from the refrigerant inlet 6 spirally flows in the liquid distribution space to complete gas-liquid separation (collision separation or inertia separation), gaseous refrigerants in the mixture and refrigerant liquid drops carried by the gaseous refrigerants spirally flow upwards under the action of inertia force and buoyancy force, and large-particle-diameter liquid drops carried by the gaseous refrigerants are settled and then drop downwards.
The specific structure of casing does: the top of barrel 1 is equipped with circular shape upper cover plate 4, seals the top of barrel 1, and is equipped with the refrigerant export 5 of connecting the outlet duct on upper cover plate 4. The bottom of the cylinder body 1 is provided with a round lower cover plate 7 which seals the bottom of the cylinder body 1. The structure of the shell can be other forms as long as the liquid distribution space capable of spirally flowing is formed.
The inner cylinder 92 is vertically through and tapered (specifically, may be in a circular truncated cone shape), that is, the radial cross section gradually increases from top to bottom, so that the volume of the annular liquid distribution space gradually decreases from top to bottom, the liquid refrigerant spirally flows downwards, the gaseous refrigerant spirally flows upwards, and the primary inertial separation and the secondary settling separation of liquid droplets of the refrigerant gas-liquid mixture are completed in the space.
The refrigerant import 6 is connected the feed liquor pipe, and the flow direction of the refrigerant that the axis direction of feed liquor pipe is, this flow direction is perpendicular and skew axis of barrel 1, makes the refrigerant follow the refrigerant import 6 and get into the back and automatic rotatory along annular cloth liquid space, and the refrigerant flow direction skew axis of barrel 1 apart from the distance more greatly, and centrifugal effect is better.
Cloth liquid subassembly 9 is annular equal liquid board 91 still including setting up the bottom of annular baffle 93 and inner tube 92 at the top of inner tube 92, and equal liquid board 91 is parallel with baffle 93, specifically as follows:
the baffle 93 is vertical to the axis of the cylinder 1, the baffle 93 is spaced from the inner wall of the cylinder 1, the gaseous refrigerant flows upwards spirally and then hits the baffle 93 to turn to separate small liquid drops carried in a gas phase, and the turned gaseous refrigerant continuously flows upwards from the spacing between the baffle 93 and the inner wall of the cylinder 1 and flows out from the refrigerant outlet 5 at the top.
The outer wall of inner tube 92 and the inner wall of barrel 1 are connected to liquid-equalizing plate 91, are equipped with a plurality of flow-equalizing holes on liquid-equalizing plate 91, and the liquid refrigerant of downward flow need pass the hole that flow-equalizing just can reach the bottom region of barrel 1, makes the cloth liquid even, and barrel 1's bottom region installation heat exchange coil 8, the spiral pipe promptly, and heat exchange coil 8's water side import 2 and water side export 3 are worn out from the side of casing. The hole interval that flow equalizes arranges the circularity, sets up many circles along annular liquid board 91 that flow equalizes promptly, and each circle flow equalizes the hole and sets up with the internal edge or the outward flange of liquid board 91 are concentric.
The number of turns of the flow equalizing holes corresponds to the number of layers of the spiral pipe. The number of turns of the equalizing hole can be set to other numbers, and the number is within the protection scope of the invention.
The hot water entering from the water side inlet 2 of the double-layer spiral pipe is gradually evaporated and absorbed by the liquid refrigerant on the outer surface of the pipe, the temperature is gradually reduced, and the generated required low-temperature water is discharged through the water side outlet 3.
In order to enable the liquid refrigerant to flow to the flow equalizing holes rapidly, a plurality of lugs are arranged on the liquid equalizing plate 91, the lugs are located at intervals between two adjacent flow equalizing holes, namely, the areas between two adjacent lugs on the liquid equalizing plate 91 are sunken areas communicated with the flow equalizing holes, the lugs are not connected with the lugs, a plurality of sunken areas are connected, refrigerant runners communicated with all the flow equalizing holes are formed, the liquid refrigerant can be timely supplemented to the areas near the flow equalizing holes, and liquid distribution is guaranteed to be uniform. The aperture of each circle of flow equalizing hole can be determined by calculation according to the spiral radius, the number of vertical circles and the evaporation capacity of the spiral pipe.
The above embodiments will now be described in detail with reference to fig. 5 to 7. The two circles of flow equalizing holes are concentrically arranged, the outer circle flow equalizing hole 913 and the inner circle flow equalizing hole 915 are spaced, an annular flow channel 914 is arranged at the interval, a first lug 911 is arranged between every two adjacent outer circle flow equalizing holes 913, a second lug 916 is arranged between every two adjacent inner circle flow equalizing holes 915, the first lug and the second lug are arranged along the radial direction, a circle of annular flow channel 914 is formed between every two adjacent lugs at intervals, and the annular flow channel 914 is connected with recessed areas between all lugs to form a flow channel communicated with all the flow equalizing holes.
The invention also provides a heat exchanger which comprises the liquid distribution device and can be a spiral tube falling film type heat exchanger.
Through the liquid distribution device, gas-phase refrigerants entering from an inlet at a high speed and refrigerant liquid drops carried by the refrigerants spirally flow upwards under the action of inertia force and buoyancy force, the diameter of the upper part of the conical inner cylinder is smaller, the whole liquid distribution space is upwards a gradually-expanding section, the upward flow velocity of the gas-phase refrigerants is gradually reduced, the carrying capacity of the liquid drops is gradually reduced, large-particle-size liquid drops carried by the gas-phase refrigerants are downwards dropped after gravity settling, and secondary gas-liquid separation is completed.
The invention also provides an air conditioner which comprises the heat exchanger, wherein the air conditioner can be a water cooling unit.
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 (10)
1. A liquid distribution device is characterized by comprising: the liquid distribution device comprises a shell and a liquid distribution assembly arranged in the shell, wherein a liquid distribution space surrounding the liquid distribution assembly is formed between the shell and the liquid distribution assembly, a refrigerant outlet is formed in the upper part of the shell, and a refrigerant inlet is formed in one side of the shell to enable a refrigerant to flow spirally along the liquid distribution space.
2. The liquid distribution device according to claim 1, wherein the housing is a cylinder, and the liquid distribution assembly comprises an inner cylinder arranged in the cylinder, and the inner cylinder is vertically through and tapered, so that the volume of the liquid distribution space is gradually reduced from top to bottom.
3. The fluid distribution device as set forth in claim 2, wherein the fluid distribution assembly further comprises: the baffle is arranged at the top of the inner barrel, the periphery of the baffle is spaced from the inner wall of the barrel, and the refrigerant outlet is arranged at the top of the barrel.
4. The fluid distribution device as set forth in claim 2, wherein the fluid distribution assembly further comprises: connect the bottom of inner tube with the equal liquid board between the shells inner wall, it has the equal discharge orifice to all be gone up to the equal liquid board.
5. The liquid distribution device according to claim 4, wherein the plurality of liquid equalizing holes are arranged in at least one circle along the liquid equalizing plate, a bump is arranged at the interval between two adjacent liquid equalizing holes in the same circle, and the depressed areas of all the bumps are connected to form a flow passage communicated with the liquid equalizing holes.
6. The liquid distribution device as recited in claim 5, wherein the number of the flow equalizing holes corresponds to the number of the layers of the heat exchange coil.
7. The liquid distribution device of claim 1, wherein the heat exchange coil in the housing is disposed below the liquid distribution assembly.
8. The liquid distribution device according to claim 1, wherein the refrigerant inlet has a refrigerant flow direction perpendicular to and offset from a central axis of the housing.
9. A heat exchanger, characterized in that it comprises a liquid distribution device according to any one of claims 1 to 8.
10. An air conditioner characterized by comprising the heat exchanger of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334813.0A CN114001497A (en) | 2021-11-11 | 2021-11-11 | Liquid distribution device, heat exchanger and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334813.0A CN114001497A (en) | 2021-11-11 | 2021-11-11 | Liquid distribution device, heat exchanger and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN114001497A true CN114001497A (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111334813.0A Pending CN114001497A (en) | 2021-11-11 | 2021-11-11 | Liquid distribution device, heat exchanger and air conditioner |
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| Country | Link |
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| CN (1) | CN114001497A (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
- 2021-11-11 CN CN202111334813.0A patent/CN114001497A/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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