CN116294303B - Method for improving heat exchange efficiency of falling film evaporator and evaporator device thereof - Google Patents
Method for improving heat exchange efficiency of falling film evaporator and evaporator device thereof Download PDFInfo
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- CN116294303B CN116294303B CN202310352385.7A CN202310352385A CN116294303B CN 116294303 B CN116294303 B CN 116294303B CN 202310352385 A CN202310352385 A CN 202310352385A CN 116294303 B CN116294303 B CN 116294303B
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- evaporator
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- pipe
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000011552 falling film Substances 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 239000003507 refrigerant Substances 0.000 claims abstract description 43
- 239000007921 spray Substances 0.000 claims abstract description 33
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 238000001704 evaporation Methods 0.000 claims description 22
- 230000008020 evaporation Effects 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000014666 liquid concentrate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F25B39/028—Evaporators having distributing means
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
-
- 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
- F25B2339/024—Evaporators with refrigerant in a vessel in which is situated a heat exchanger
- F25B2339/0242—Evaporators with refrigerant in a vessel in which is situated a heat exchanger having tubular elements
Landscapes
- 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 method for improving heat exchange efficiency of a falling film evaporator and an evaporator device thereof, wherein the device comprises the following steps: main part unit, reposition of redundant personnel unit, confluence unit and flow control unit, the main part unit includes: the evaporator shell, set up in the base of evaporator shell bottom side, set up in a plurality of heat exchange tubes of evaporator shell inboard, fixed set up in the inboard installing frame of evaporator shell, equidistant install in the knockout in the installing frame, and set up in a plurality of shower heads of knockout bottom side, the reposition of redundant personnel unit includes: and the second diversion chamber is arranged on the evaporator shell. According to the invention, the refrigerant is sprayed onto the heat exchange tube in an atomization manner by adopting a spray head spraying manner, so that the traditional orifice plate type liquid separation is replaced, the contact range of the refrigerant and the heat exchange tube is greatly improved, and the good heat exchange effect is improved.
Description
Technical Field
The invention relates to the technical field of air conditioning systems, in particular to a method for improving heat exchange efficiency of a falling film evaporator and an evaporator device thereof.
Background
The evaporator is an important component in four parts of heat exchangers, and low-temperature low-pressure refrigerant liquid passes through the evaporator and exchanges heat with an external medium, so that the refrigerant is converted into a gaseous state and is sent into the compressor.
In an air conditioner refrigerating system, an internal heat exchange mode of an evaporator is to exchange heat by adopting a mode that a refrigerant is in flowing contact with the outer wall of a heat exchange tube, and a falling film evaporator adopts an orifice plate to divide liquid, so that the orifice plate divides liquid unevenly due to the reduction of the flow of the refrigerant in partial load, and the heat exchange efficiency of the whole heat exchanger is seriously reduced.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above-mentioned problems occurring in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme: a method of improving heat exchange efficiency of a falling film evaporator and an evaporator apparatus therefor, the method employing an evaporator heat exchange apparatus comprising: the device comprises a main body unit, a flow dividing unit, a flow converging unit and a flow control unit;
the main body unit includes: the evaporator comprises an evaporator shell, a base arranged at the bottom side of the evaporator shell, a plurality of heat exchange tubes arranged at the inner side of the evaporator shell, a mounting rack fixedly arranged at the inner side of the evaporator shell, a liquid distributor arranged on the mounting rack at equal intervals, and a plurality of spray heads arranged at the bottom side of the liquid distributor, wherein electric heating modules are symmetrically arranged at two sides of the mounting rack;
the splitting unit includes: the evaporator comprises a first diversion chamber and a second diversion chamber, wherein the first diversion chamber is arranged on the first diversion chamber, the second diversion chamber is internally and symmetrically connected with a baffle plate, three gate ports are arranged in the first diversion chamber, the gate ports at the middle position are controlled to be on-off through a first gate plate, and the gate ports at the two side positions are controlled to be on-off through a second gate plate;
the flow control unit includes: the symmetry set up in electric telescopic handle of base both sides, set up in crane on the electric telescopic handle output and set up in the communication mechanism on the evaporimeter casing, just communication mechanism is connected with the knockout, the both sides of crane still fixedly connected with a plurality of piston rods, the piston rod extends to in the first water conservancy diversion room and first flashboard, second flashboard fixed connection.
As a preferred embodiment of the evaporator device according to the invention, wherein: the communication mechanism is a plurality of vertical pipes, each vertical pipe is directly connected with the liquid distributor, and each vertical pipe controls flow through a corresponding electromagnetic valve.
As a preferred embodiment of the evaporator device according to the invention, wherein: the communication mechanism is a communication piece, the communication piece includes: the lifting frame is provided with a plurality of shunt tubes, the upper sides of the shunt tubes are communicated with the first elastic telescopic tubes, the shunt tubes are communicated with corresponding communicating pieces one by one, and each communicating piece is communicated with the liquid distributor through a vertical pipe;
when the second elastic telescopic pipe is compressed, namely, the long shaft in the middle second elastic telescopic pipe drives the sealing piston to block the outlet end area of the lower reducer pipe, so that the refrigerant can only be conducted from the second elastic telescopic pipes at two sides, and the working pressure of the spray heads at two sides is improved.
As a preferred embodiment of the evaporator device according to the invention, wherein: the length of the second flashboard is twice that of the first flashboard, and the length of the long shaft in the second elastic telescopic pipe positioned at the middle position is twice that of the long shafts in the second elastic telescopic pipes positioned at the two sides.
As a preferred embodiment of the evaporator device according to the invention, wherein: the installation rack is symmetrically and fixedly connected with heat conducting tiles, and a plurality of heat exchange tubes in the evaporator shell are divided into three groups by the heat conducting tiles to form three evaporation areas, and the three evaporation areas are respectively used for heat exchange of the refrigerant in the spraying areas formed by the spray heads at different positions.
As a preferred embodiment of the evaporator device according to the invention, wherein: the inner area of the second diversion chamber is divided into three diversion areas by a partition plate, and each diversion area corresponds to one evaporation area respectively.
As a preferred embodiment of the evaporator device according to the invention, wherein: one side of the evaporator shell is provided with an air outlet pipe and a liquid outlet pipe respectively, and the air outlet pipe and the liquid outlet pipe are provided with corresponding control valves.
As a preferred embodiment of the evaporator device according to the invention, wherein: when the electric telescopic rod descends to the first flashboard length body position, the second flashboard is completed to plug the middle flashboard, when the electric telescopic rod descends to the second flashboard length body position, the first flashboard and the second flashboard are synchronously completed to plug all the flashboard, and meanwhile, the sealing piston is completed to plug all the lower reducer pipes.
As a preferred embodiment of the evaporator device according to the invention, wherein: the flow splitting unit and the flow converging unit have the same structure, namely, the flow splitting unit is used for splitting the heat conduction liquid, and the flow converging unit is used for converging the heat conduction liquid.
A method for improving heat exchange efficiency of a falling film evaporator of an evaporator apparatus as described above, comprising the steps of:
step one: the refrigerant circulating in the refrigerating system enters the shunt tubes through the first elastic telescopic tubes and is shunted into each knockout under the conduction of the communication mechanism;
step two: spraying the refrigerant liquid onto the heat exchange tubes in the evaporator shell through a plurality of spray heads uniformly distributed at the bottom of the liquid separator, and enabling the refrigerant liquid to contact with the outer walls of the heat exchange tubes for heat exchange;
step three: under the barrier of the heat conducting tile, dividing the evaporation area inside the evaporator shell into three parts, wherein each evaporation area corresponds to a plurality of spray heads on one liquid distributor;
step four: when the flowing pressure of the refrigerant in the refrigerating system is reduced, the lifting frame is controlled to descend through the electric telescopic rod, the communicating mechanism controls the pressure of the spray heads at the two sides to be increased, the middle spray head stops working, and the spraying uniformity of the refrigerant is ensured;
step five: the crane descends and can drive the second flashboard to descend, when the long shaft in the middle second elastic telescopic pipe drives the sealing piston to block the outlet end of the lower reducer pipe, the second flashboard can also block the gate positioned in the middle of the first diversion chamber, so that heat conduction liquid can only enter from the gates on two sides, corresponding heat conduction liquid concentrates to flow from the heat exchange pipes in the areas on two sides of the evaporator shell, and then the heat conduction liquid corresponds to the spraying areas of the spray heads on two sides, and heat exchange efficiency is improved.
The invention has the beneficial effects that:
1. according to the invention, the refrigerant is sprayed onto the heat exchange tube in an atomization manner by adopting a spray head spraying manner, so that the traditional orifice plate type liquid separation is replaced, the contact range of the refrigerant and the heat exchange tube is greatly improved, and the good heat exchange effect is improved;
2. according to the invention, the diversion of the refrigerant and the diversion of the heat-conducting medium are controlled simultaneously through the electric telescopic rod, the refrigerant is rapidly concentrated into the spray headers at two sides to be sprayed out under the condition that the low-load refrigerant flow of the system is obviously reduced, and meanwhile, the heat-exchanging medium is also concentrated into the heat-exchanging pipes of the evaporation areas at two sides to flow under the condition that the second flashboard plugs the middle gate, so that the pressure of the spray head is ensured, and the evaporation areas, the diversion area and the spray areas are mutually corresponding, thereby facilitating the concentrated heat exchange of the refrigerant and greatly improving the heat exchange efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic view showing a side structure of an evaporator apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic view of the inside of the front structure of an evaporator device according to a first embodiment of the invention;
FIG. 3 is a schematic diagram showing a side structure of an evaporator device according to a second embodiment of the present invention;
FIG. 4 is a schematic view of another side structure of an evaporator device according to a second embodiment of the invention
FIG. 5 is a schematic view showing an internal structure of a first guide chamber of the evaporator apparatus;
FIG. 6 is a schematic view showing an internal structure of a second guide chamber of the evaporator apparatus;
FIG. 7 is a schematic view of the inside of the front structure of an evaporator device according to a second embodiment of the invention;
fig. 8 is a partially cross-sectional schematic view of a communication member in a second embodiment;
fig. 9 is a schematic diagram showing the change in the spraying state of the evaporator apparatus when the flow rate of the refrigerant is changed in the second embodiment.
In the figure: 100-main body unit, 101-evaporator shell, 102-base, 103-outlet pipe, 104-outlet pipe, 105-mounting rack, 106-dispenser, 106 a-shower head, 107-heat conduction tile, 108-heat exchange pipe, 109-electric heating module, 200-split unit, 201-first diversion chamber, 201 a-gate, 201 b-first gate, 201 c-second gate, 202-second diversion chamber, 202 a-partition, 300-confluence unit, 400-flow control unit, 401-electric telescopic rod, 402-lifting frame, 403-first elastic telescopic tube, 404-split tube, 405-piston rod, 406-communication member 406, 406 a-second elastic telescopic tube, 406 b-upper reducing tube, 406 c-lower reducing tube, 407-grid plate, 408-long axis, 409-sealing piston, 410-vertical tube.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1-2 and 5-6, in a first embodiment of the present invention, there is provided a method for improving heat exchange efficiency of a falling film evaporator and an evaporator apparatus thereof, the method using an evaporator apparatus comprising: the main body unit 100, the branching unit 200, the joining unit 300, and the flow rate control unit 400.
The main body unit 100 includes: the evaporator comprises an evaporator shell 101, a base 102 arranged at the bottom side of the evaporator shell 101, a plurality of heat exchange tubes 108 arranged at the inner side of the evaporator shell 101, a mounting rack 105 fixedly arranged at the inner side of the evaporator shell 101, a liquid distributor 106 arranged on the mounting rack 105 in an equidistant mounting manner and a plurality of spray heads 106a arranged at the bottom side of the liquid distributor 106, wherein one side of the evaporator shell 101 is respectively provided with an air outlet pipe 103 and a liquid outlet pipe 104, the air outlet pipe 103 and the liquid outlet pipe 104 are respectively provided with corresponding control valves, and electric heating modules 109 are symmetrically arranged at two sides of the mounting rack 105 and used for secondary heating treatment in the evaporator.
The diverting unit 200 includes: the evaporator comprises a second diversion chamber 202 arranged on an evaporator shell 101, a first diversion chamber 201 arranged on the second diversion chamber 202, a partition plate 202a symmetrically and fixedly connected in the second diversion chamber 202, three gate ports 201a are arranged in the first diversion chamber 201, the gate ports 201a at the middle position are controlled to be on-off through a second gate plate 201c, the gate ports 201a at the two sides are controlled to be on-off through a first gate plate 201b, the inner area of the second diversion chamber 202 is divided by the partition plate 202a into three diversion areas, each diversion area corresponds to one evaporation area respectively, heat exchange media led out by each diversion area are directly poured into all heat exchange tubes 108 in the corresponding evaporation area, the structure of a diversion unit 200 is the same as that of a confluence unit 300, namely the diversion unit 200 is used for diversion of heat exchange fluid, the confluence unit 300 is used for confluence of heat exchange fluid, and the heat exchange media flow out of the confluence unit 300 from one side of the diversion unit 200 continuously circulates.
The flow control unit 400 includes: the electric telescopic rods 401 symmetrically arranged on two sides of the base 102, the lifting frames 402 arranged on the output ends of the electric telescopic rods 401 and the communication mechanism arranged on the evaporator shell 101 are connected with the liquid separator 106, two sides of the lifting frames 402 are fixedly connected with the piston rods 405, the piston rods 405 extend into the first diversion chamber 201 and are fixedly connected with the first flashboard 201b and the second flashboard 201c, and particularly, the communication mechanism is a plurality of vertical pipes 410, each vertical pipe 410 is directly connected with the liquid separator, and each vertical pipe 410 controls flow through corresponding electromagnetic valves.
The method comprises the following steps:
step one: the refrigerant circulating in the refrigerating system enters the shunt tubes 404 through the first elastic telescopic tubes 403 and is shunted into each knockout 106 under the conduction of the communication mechanism, namely the standpipe 410;
step two: a plurality of spray heads 106a uniformly distributed at the bottom of the liquid separator 106 are sprayed onto the heat exchange tubes 108 in the evaporator shell 101, and the refrigerant liquid contacts with the outer walls of the heat exchange tubes 108 to exchange heat;
step three: under the barrier of the heat conducting tile 107, the evaporation area inside the evaporator shell 101 is divided into three, and each evaporation area corresponds to a plurality of spray heads 106a on one liquid distributor 106;
step four: when the flowing pressure of the refrigerant in the refrigerating system is reduced, the electric telescopic rod 401 controls the lifting frame 402 to descend, the communication mechanism, namely the corresponding electromagnetic valve on the vertical pipe 410 controls the pressure of the spray heads 106a at two sides to be increased, the middle spray head 106a stops working, and the spraying uniformity of the refrigerant is ensured.
In summary, the refrigerant is sprayed onto the heat exchange tube 108 in an atomization manner by adopting the spray header 106a, so that the traditional orifice plate type liquid separation is replaced, the contact range of the refrigerant and the heat exchange tube 108 is greatly improved, and the good heat exchange effect is improved.
Example two
Referring to fig. 3 to 9, a second embodiment of the present invention is different from the first embodiment in that:
the installation rack 105 is symmetrically and fixedly connected with heat conducting tiles 107, a plurality of heat exchange tubes 108 in the evaporator shell 101 are divided into three groups by the heat conducting tiles 107 to form three evaporation areas, the three evaporation areas are respectively used for heat exchange of the refrigerant in the spraying areas formed by the spray heads 106a at different positions, the spraying area at the bottom side of each liquid distributor 106 can completely cover each independent evaporation area, and when the flow rate of the refrigerant is large, each spraying area and each evaporation area are in a working state;
when the electric telescopic rod 401 descends to the length position of one first flashboard 201b, the blocking of the middle flashboard 201a by the second flashboard 201c is completed, when the electric telescopic rod 401 descends to the length position of one second flashboard 201c, the first flashboard 201b and the second flashboard 201c synchronously complete the blocking of all the flashboard 201a, and meanwhile, the sealing piston 409 completes the blocking of all the lower reducing pipes 406c, namely, the length of a long shaft 408 at the middle position is equal to that of the second flashboard 201c, and the lengths of long shafts 408 at two sides are equal to that of the first flashboard 201 b;
the shunt tube 404 disposed on the lifting frame 402, the first elastic telescopic tube 403 is disposed on the upper side of the shunt tube 404, and three communicating members 406 are disposed on the bottom side of the shunt tube 404, that is, the communicating mechanism in the first embodiment is three communicating members 406, and each communicating member 406 is connected with the dispenser 106 through the standpipe 410, specifically: the communication member 406 includes: the second elastic telescopic pipe 406a, an upper reducing pipe 406b arranged on the upper side of the second elastic telescopic pipe 406a, and a lower reducing pipe 406c arranged on the bottom side of the second elastic telescopic pipe 406a, wherein a grid plate 407 is fixedly connected in the upper reducing pipe 406b, a long shaft 408 is fixedly connected on the bottom side of the grid plate 407, a sealing piston 409 for sealing the vertical pipe 410 is fixedly connected on the bottom side of the long shaft 408, the upper reducing pipe 406b is communicated with the shunt pipe 404, the lower reducing pipe 406c is communicated with the vertical pipe 410, an opening is formed in the grid plate 407 and used for guiding out refrigerant, the sealing piston 409 is used for sealing the vertical pipe 410, and the sealing piston 409 can be adhered to the inner wall of the vertical pipe 410 to slide;
in addition, a plurality of piston rods 405 are fixedly connected to two sides of the lifting frame 402, and the piston rods 405 extend into the first diversion chamber 201 and are fixedly connected with the first flashboard 201b and the second flashboard 201 c. The sealing piston 409 and the first gate 201b and the second gate 201c can move synchronously, so that the refrigerant and the heat exchange medium can synchronously realize flow control, and it is to be noted that the length of the second gate 201c is twice that of the first gate 201b, the length of the long shaft 408 in the second elastic telescopic tube 406a positioned at the middle position is twice that of the long shaft 408 in the second elastic telescopic tubes 406a positioned at the two sides, that is, when the sealing piston 409 and the second gate 201c positioned at the middle position complete the sealing, the pipelines at the two sides are still in a conducting state, and only if the electric telescopic rod 401 continues to descend, the sealing of all loops can be completed.
When the flowing pressure of the refrigerant in the refrigerating system is reduced, the electric telescopic rod 401 controls the lifting frame 402 to descend, so that the second elastic telescopic pipe 406a is compressed, namely the long shaft 408 in the middle second elastic telescopic pipe 406a drives the sealing piston 409 to block the outlet end area of the lower reducer pipe 406c, so that the refrigerant can only be conducted from the second elastic telescopic pipes 406a at two sides, the working pressure of the spray heads 106a at two sides is improved, and the spraying uniformity of the refrigerant is ensured;
the lifting frame 402 descends and drives the second flashboard 201c to descend, when the long shaft 408 in the middle second elastic telescopic pipe 406a drives the sealing piston 409 to block the outlet end of the lower reducing pipe 406c, the second flashboard 201c also blocks the middle gate 201a in the first diversion chamber 201, so that heat conduction liquid can only enter from the gates 201a at two sides, and the corresponding heat conduction liquid flows from the heat exchange pipes 108 in the two side areas of the evaporator shell 101 in a concentrated manner, thus corresponding to the spraying areas of the spray heads 106a at two sides, and heat exchange efficiency is improved.
The electric telescopic rod 401 is used for simultaneously controlling the flow division of the refrigerant and the flow division of the heat-conducting medium, under the condition that the flow rate of the refrigerant with low load of the system is obviously reduced, the refrigerant is rapidly concentrated to the spray headers 106a on two sides for spraying, meanwhile, the heat-exchanging medium flows in the heat-exchanging pipes 108 which are concentrated to the evaporation areas on two sides under the blocking of the middle gate 201a by the second gate 201c, the pressure of the spray heads is ensured, and meanwhile, the evaporation areas, the flow guiding areas and the spray areas are mutually corresponding, so that the concentrated heat exchange of the refrigerant is facilitated, and the heat exchange efficiency is greatly improved.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (10)
1. An evaporator apparatus, comprising: a main body unit (100), a diversion unit (200), a confluence unit (300), and a flow control unit (400);
the main body unit (100) includes: the evaporator comprises an evaporator shell (101), a base (102) arranged at the bottom side of the evaporator shell (101), a plurality of heat exchange tubes (108) arranged at the inner side of the evaporator shell (101), a mounting rack (105) fixedly arranged at the inner side of the evaporator shell (101), a liquid distributor (106) arranged on the mounting rack (105) at equal intervals, and a plurality of spray heads (106 a) arranged at the bottom side of the liquid distributor (106), wherein electric heating modules (109) are symmetrically arranged at two sides of the mounting rack (105);
the branching unit (200) includes: the evaporator comprises a second diversion chamber (202) arranged on an evaporator shell (101), and a first diversion chamber (201) arranged on the second diversion chamber (202), wherein a partition plate (202 a) is symmetrically and fixedly connected in the second diversion chamber (202), three gate ports (201 a) are arranged in the first diversion chamber (201), the gate ports (201 a) in the middle position are controlled to be on-off through a second gate plate (201 c), and the gate ports (201 a) in the two side positions are controlled to be on-off through a first gate plate (201 b);
the flow control unit (400) includes: the symmetrical set up in electric telescopic handle (401) of base (102) both sides, set up in crane (402) on electric telescopic handle (401) output and set up in communication mechanism on evaporator casing (101), just communication mechanism is connected with knockout (106), the both sides of crane (402) still fixedly connected with a plurality of piston rods (405), piston rod (405) extend to in first guide chamber (201) with first flashboard (201 b), second flashboard (201 c) fixed connection.
2. An evaporator unit as set forth in claim 1 wherein: the communication mechanism is a plurality of vertical pipes (410), each vertical pipe (410) is directly connected with the liquid separator, and each vertical pipe (410) controls flow through a corresponding electromagnetic valve.
3. An evaporator unit as set forth in claim 1 wherein: the communication mechanism is a communication piece (406), the communication piece (406) comprises: the device comprises a second elastic telescopic pipe (406 a), an upper reducing pipe (406 b) arranged on the upper side of the second elastic telescopic pipe (406 a) and a lower reducing pipe (406 c) arranged on the bottom side of the second elastic telescopic pipe (406 a), wherein a grid plate (407) is fixedly connected in the upper reducing pipe (406 b), a long shaft (408) is fixedly connected to the bottom side of the grid plate (407), a sealing piston (409) for sealing a vertical pipe (410) is fixedly connected to the bottom side of the long shaft (408), a plurality of shunt pipes (404) are arranged on the lifting frame (402), the upper sides of the shunt pipes (404) are communicated with each other through the first elastic telescopic pipe (403), the shunt pipes (404) are communicated with corresponding communicating pieces (406) one by one, and each communicating piece (406) is communicated with the dispenser (106) through the vertical pipe (410);
when the second elastic telescopic pipe (406 a) is compressed, namely, the long shaft (408) in the middle second elastic telescopic pipe (406 a) drives the sealing piston (409) to block the outlet end area of the lower reducer pipe (406 c), so that the refrigerant can only be conducted from the second elastic telescopic pipes (406 a) at two sides, and the working pressure of the spray heads (106 a) at two sides is improved.
4. An evaporator unit as set forth in claim 3 wherein: the length of the second flashboard (201 c) is twice as long as the first flashboard (201 b), and the length of the long shaft (408) in the second elastic telescopic pipe (406 a) positioned at the middle position is twice as long as the long shafts (408) in the second elastic telescopic pipes (406 a) positioned at the two sides.
5. An evaporator unit as set forth in claim 4 wherein: the heat exchange device is characterized in that heat conducting tiles (107) are symmetrically and fixedly connected to the mounting frame (105), and a plurality of heat exchange tubes (108) in the evaporator shell (101) are separated into three groups by the heat conducting tiles (107) to form three evaporation areas, and the three evaporation areas are respectively used for exchanging heat with the refrigerant in the spraying areas formed by the spray heads (106 a) at different positions.
6. An evaporator unit according to claim 2 or 5 wherein: the inner area of the second diversion chamber (202) is divided into three diversion areas by a partition plate (202 a), and each diversion area corresponds to one evaporation area respectively;
the lifting frame (402) descends and drives the second flashboard (201 c) to descend, when the long shaft (408) in the middle second elastic telescopic pipe (406 a) drives the sealing piston (409) to block the outlet end of the lower reducing pipe (406 c), the second flashboard (201 c) also blocks the middle flashboard (201 a) in the first diversion chamber (201), so that heat conduction liquid can only enter from the two side flashboard (201 a), and corresponding heat conduction liquid is concentrated to flow from the heat exchange pipes (108) in the two side areas of the evaporator shell (101), and then corresponds to the spraying areas of the two side spray heads (106 a), and heat exchange efficiency is improved.
7. An evaporator apparatus as set forth in claim 6 wherein: one side of the evaporator shell (101) is provided with an air outlet pipe (103) and a liquid outlet pipe (104) respectively, and the air outlet pipe (103) and the liquid outlet pipe (104) are provided with corresponding control valves.
8. An evaporator unit as set forth in claim 7 wherein: when the electric telescopic rod (401) descends to the length position of the first flashboard (201 b), the second flashboard (201 c) is used for plugging the middle flashboard (201 a), when the electric telescopic rod (401) descends to the length position of the second flashboard (201 c), the first flashboard (201 b) and the second flashboard (201 c) synchronously plug all the flashboard (201 a), and meanwhile, the sealing piston (409) is used for plugging all the lower reducer pipes (406 c).
9. An evaporator apparatus as set forth in claim 8 wherein: the flow splitting unit (200) has the same structure as the flow converging unit (300), namely, the flow splitting unit (200) is used for splitting heat conduction liquid, and the flow converging unit (300) is used for converging the heat conduction liquid.
10. A method of increasing the heat transfer efficiency of a falling film evaporator of an evaporator apparatus according to claim 9, the method comprising the steps of:
step one: refrigerant circulating in the refrigerating system enters the shunt tube (404) through the first elastic telescopic tube (403) and is shunted into each knockout (106) under the conduction of the communication mechanism;
step two: a plurality of spray heads (106 a) uniformly distributed at the bottom of the liquid separator (106) are sprayed onto the heat exchange tube (108) in the evaporator shell (101), and the refrigerant liquid is in contact with the outer wall of the heat exchange tube (108) for heat exchange;
step three: dividing the evaporation area inside the evaporator shell (101) into three parts, wherein each evaporation area corresponds to a plurality of spray heads (106 a) on one liquid distributor (106);
step four: when the flowing pressure of the refrigerant in the refrigerating system is reduced, the lifting frame (402) is controlled to descend through the electric telescopic rod (401), the communicating mechanism controls the pressure of the spray heads (106 a) at two sides to be increased, the middle spray head 106a stops working, and the spraying uniformity of the refrigerant is ensured.
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| KR101288270B1 (en) * | 2012-04-19 | 2013-07-26 | (주)귀뚜라미 | Water spray unit for evaporative cooler |
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