CN220852371U - Fan coil device for countercurrent heat exchange - Google Patents
Fan coil device for countercurrent heat exchange Download PDFInfo
- Publication number
- CN220852371U CN220852371U CN202322485195.0U CN202322485195U CN220852371U CN 220852371 U CN220852371 U CN 220852371U CN 202322485195 U CN202322485195 U CN 202322485195U CN 220852371 U CN220852371 U CN 220852371U
- Authority
- CN
- China
- Prior art keywords
- medium
- heat exchange
- fan
- coiled pipe
- fan coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009423 ventilation Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 40
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 239000010949 copper Substances 0.000 description 11
- 238000005057 refrigeration Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a fan coil device for countercurrent heat exchange, which comprises a condensation water tray, a countercurrent type fin coiled pipe heat exchanger, a fan and a ventilation volume channel, wherein the countercurrent type fin coiled pipe heat exchanger is formed by nesting at least two groups of coiled pipes into a whole after being horizontally distributed and overlapped at an upper-lower interval, one end of each group of coiled pipes close to an air outlet is a coiled pipe medium f inflow port, one end of each group of coiled pipes close to an air inlet is a coiled pipe medium f outflow port, each group of coiled pipe medium f inflow ports are communicated with a distribution manifold, each group of coiled pipe medium f outflow ports are communicated with the distribution manifold, an exhaust valve is arranged at the top of the distribution manifold, the countercurrent type fin coiled pipe heat exchanger is integrally arranged in the ventilation volume channel, and an air inlet of the ventilation volume channel is connected with the air outlet channel of the fan. The utility model can realize countercurrent heat exchange between air and medium f in the coiled pipe, prolong the countercurrent flow of heat exchange, improve the heat exchange efficiency and realize the purpose of energy conservation.
Description
Technical Field
The utility model relates to the technical field of air heat exchange equipment, in particular to a fan coil device for countercurrent heat exchange.
Background
The fan-coil unit can be divided into a water channel and a gas channel, and is an indispensable important device in a semi-centralized air conditioning system. The fan-coil units are developed from 1972 in China and are firstly applied to an air conditioning system of a new building of a Beijing restaurant. In order to improve the efficiency of fan coils in practical engineering, scientific and technical staff mainly innovate from new structural forms of fan coils, continuously improve heat exchange efficiency, reduce noise by adopting a low-speed fan, and greatly study and put forward a lot of designs and improvement schemes from several aspects of improving indoor air quality, automatically controlling the level and the like.
The structure of the fan coil unit is simpler in structure and system form, such as a common ceiling fan coil; it is characterized by that in a small structural space a centrifugal or cross-flow ventilator and a heat-transfer tube bundle with copper tube penetrating rib are assembled. The fan coil with thermal characteristics has two main performance indexes, namely air quantity and heat exchange quantity. The air quantity is determined by fan type selection; the amount of heat transfer is related to factors such as the heat transfer area of the coil, the temperature and flow of the heating or cooling medium, and the temperature and flow rate of air passing through the coil. The heat transfer tube bundle of the fan coil is formed by threading aluminum ribs with copper tubes with smaller diameters, arranging the copper tubes into 2 to 4 rows of tube bundles, vertically arranging the copper tubes up and down by adopting coiled tubes, enabling cold water and hot water to flow in a serpentine reciprocating manner in the tubes, enabling air to pass through the ribs outside the tubes, and enabling media and outside air to form a cross-flow heat exchange mode. The water is supplied with heat or cold by the central air conditioner, the cold source equipment supplies cold for the refrigerator, the boiler or the heat pump supplies hot water, and the hot water is conveyed into the coil pipe to circularly flow under the action of the water pump. The air in the air path is blown into the room from the return air inlet by the fan, the indoor air passes across the coil pipe to exchange heat with the cool water or the warm medium water in the coil pipe, the indoor air is cooled, dehumidified or heated, and then the indoor air is sent into the room by the air feeder. The fan coil generally has 2 to 4 rows of copper tubes, each row being 8 copper tubes and a total of 16 copper tubes; three rows are 24 copper tubes in total. The more the number of copper tubes is, the better the refrigerating effect is. When the temperature difference between inlet water and outlet water of the fan coil is increased, the heat transfer coefficient of the heat exchange coil is also reduced along with the reduction of the circulating water, the average temperature difference is small, the heat exchange power is insufficient, the disadvantage of the maximum cross-flow heat exchange is that the average temperature difference of the whole heat exchange flow is increased if the heat exchange is performed in a countercurrent mode, and all heat exchange areas play a great role. In addition, the heat transfer temperature difference is changed, and the medium reflux temperature in the tube is correspondingly lower or higher (during refrigeration). Therefore, the refrigerating capacity of the fan coil is reduced along with the increase of the temperature difference of the water supply and return, mainly caused by the reduction of the circulating capacity of the refrigerant water, and the refrigerating capacity can be reduced by about 17 percent when the temperature difference of the water supply and return is increased from 5 ℃ to 7 ℃ according to statistics when the temperature of the water supply is 7 ℃. Therefore, only the chilled water temperature is required to be low, and the refrigeration capacity is reduced regardless of the chilled water circulation amount. On the other hand, if the chilled water temperature is too high, the air outlet temperature is high, so that the indoor air temperature requirement cannot be met, unless the fan coil is large in volume, the heat exchange area is large, or the air outlet quantity is large, but the air outlet quantity is limited, the noise is large due to the fact that the air outlet quantity is too large, and the problem that the air outlet temperature is high and the requirement temperature cannot be met is solved. At present, fans adopted in fan coils comprise a multi-blade centrifugal fan and a cross-flow fan.
The temperature of chilled water is not too low in the actual running process of the air conditioning system refrigerator, the temperature of heating medium water output by a boiler or a heat pump is not too high, otherwise, the refrigeration coefficient or the heat efficiency is lower, more power is consumed for generating unit cold quantity, and the power consumption is increased, so that the duty ratio of building energy consumption is increased. The refrigerating efficiency can be improved by adopting a method for improving the temperature of chilled water, if the water flow rate is 1 cube/hour, the water outlet temperature can be improved by 1 ℃, and the energy can be saved by about 0.29-0.38 DEG/hour, which is calculated theoretically. The air conditioner main unit itself has a refrigerating capacity rise of about 4% when the outlet water temperature of the main unit rises by one degree. The higher the chilled water temperature, the higher the refrigeration efficiency of the chiller. The water supply temperature of the chilled water is increased by 1 ℃, and the refrigerating coefficient of the chiller can be increased by about 3%, so that the temperature of the chilled water is not required to be blindly reduced or the temperature of the warm medium water is not required to be increased in daily operation. In order to meet the comfortable temperature requirement of a user, the heat exchange effect can be greatly improved by changing the traditional cross-flow heat exchange mode into the counter-flow heat exchange mode, the average temperature difference is larger, the heat exchange power can be enhanced, the outlet temperature of heating fluid can be lower than the outlet temperature of the heated fluid, the temperature of air outlet is at least close to the reflux temperature of medium in a tube by adopting the counter-flow heat exchange mode for the finned tube air heat exchanger, the difficult problem which cannot be solved by adopting the cross-flow heat exchange mode can be solved, and the temperature difference between two main units can be reduced by utilizing the temperature of chilled water or the temperature of warm medium water to improve the energy efficiency ratio of a unit, so that the purpose of saving energy is achieved.
Disclosure of utility model
In order to solve the problems, the utility model provides the fan coil device for countercurrent heat exchange, which has the advantages of improving the heat exchange efficiency, reducing the volume of the fan coil, being convenient to install and saving energy.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a fan coil device of heat transfer against current, includes the condensate water tray and locates the reverse-flow fin coiled pipe heat exchanger on the condensate water tray, still includes fan and ventilation volume passageway, the air inlet position of reverse-flow fin coiled pipe heat exchanger is located to the fan, the back is overlapped with a set of fin nest as whole through two sets of coiled pipe level ranges and upper and lower intervals in reverse-flow fin coiled pipe heat exchanger, and the one end that every set of coiled pipe is close to the air outlet position is coiled pipe medium f inflow mouth, and the one end that every set of coiled pipe is close to the air inlet position is coiled pipe medium f outflow mouth, every coiled pipe medium f inflow mouth all communicates with the reposition of redundant personnel house steward, the reposition of redundant personnel house steward lower extreme is medium f import, every coiled pipe medium f outflow mouth all communicates with the main steward, main upper end is medium f export, just the main roof is provided with the discharge valve of converging, the whole set of reverse-flow fin coiled pipe heat exchanger is in the ventilation volume passageway, ventilation volume passageway air intake connection fan air outlet passageway.
Preferably, the fins are provided as longitudinal corrugations.
Preferably, the fan is a centrifugal fan or a cross-flow fan.
Preferably, the centrifugal fan comprises a motor and a centrifugal wind wheel, and the centrifugal wind wheel is driven to rotate through a transmission shaft of the motor.
Preferably, a filter is arranged at the medium inlet of the distribution manifold.
Preferably, the filter is a Y-filter.
Preferably, the medium inlet is communicated with a fan coil medium f inflow pipeline, and the medium outlet is communicated with a fan coil medium f outflow pipeline.
Preferably, the fan coil unit is provided on the fan coil frame.
Compared with the prior art, the utility model has the following beneficial effects:
1. The utility model can realize countercurrent heat exchange between air and medium f in the serpentine tube, has large average temperature difference, enhances heat exchange power, prolongs the heat exchange flow, ensures uniform heat transfer of heat exchange area and more sufficient heat exchange, thereby improving heat exchange efficiency;
2. The utility model utilizes the advantage of large average temperature difference of countercurrent heat exchange to reduce the temperature of warm medium water or improve the temperature of cold medium water so as to realize the purpose of energy conservation;
3. The utility model reduces the volume of the fan coil by the structural design of the coiled pipe and the fins, saves metal materials, reduces the cost, reduces the height of the whole fan coil and is convenient for installation;
4. according to the utility model, the space between the fins can be increased through the structural design of the coiled pipe and the fins, so that condensed water is easy to drip, the ash amount on the surface area of the fins is reduced, meanwhile, the wind resistance can be reduced, the wind blocking area is reduced by more than 60% compared with 8 copper pipes of the traditional fan coil, and the power of a fan motor can be saved;
5. The utility model has low noise and is beneficial to improving comfort.
Drawings
FIG. 1 is a top view of the overall structure of the present utility model;
fig. 2 is a side view of the overall structure of the present utility model.
Detailed Description
The present utility model will now be described in detail with reference to fig. 1-2, wherein the exemplary embodiments and descriptions of the present utility model are provided for illustration of the present utility model and are not intended to be limiting.
A fan coil device for countercurrent heat exchange comprises a condensation water disc 3, a countercurrent fin coiled pipe heat exchanger arranged on the condensation water disc, a fan and a ventilation volume channel, wherein the fan is arranged at an air inlet position of the countercurrent fin coiled pipe heat exchanger, the countercurrent fin coiled pipe heat exchanger is formed by nesting a group of fins 2 into a whole after being horizontally arranged through at least two groups of coiled pipes 1 and overlapped at an upper-lower interval, in particular, the fins are arranged to be longitudinal waves, wind resistance can be reduced by properly increasing the distance between the fins in practical application, and the efficiency of an axial flow fan is improved, for example, the interval between the longitudinal corrugated fin groups can be more than 3 times that between the fins of a flat plate. One end of each group of coiled pipes close to the air outlet is provided with a coiled pipe medium f inflow port, one end of each group of coiled pipes close to the air inlet is provided with a coiled pipe medium f outflow port, each coiled pipe medium f inflow port is communicated with a distribution manifold 8, the lower end of the distribution manifold is provided with a medium f inlet, in addition, the medium f inlet of the distribution manifold is provided with a filter 11 which is a Y-shaped filter, each coiled pipe medium f outflow port is communicated with a confluence manifold 9, the upper end of the confluence manifold is provided with a medium f outlet 6, the top of the confluence manifold is provided with an exhaust valve 7, the counterflow fin serpentine tube heat exchanger is integrally arranged in a ventilation volume channel 15, so that the ventilation volume channel can be directly in butt joint with heat exchange fins on two sides, an air inlet of the ventilation volume channel is connected with a fan air outlet channel, a medium f inlet is communicated with a fan coil medium f inflow pipeline 10, a medium f outlet is communicated with a fan coil medium f outflow pipeline 16, an air outlet direction 14 is shown in fig. 1 and 2, a medium f flow direction 13 is shown in fig. 2, and meanwhile, the whole fan coil device is arranged on a fan coil frame 12.
The fan is a centrifugal fan or a cross-flow fan, wherein the centrifugal fan comprises a motor 5 and a centrifugal wind wheel 4, the centrifugal wind wheels are driven to rotate by a transmission shaft of the motor, and the two centrifugal wind wheels are provided with one motor, and of course, one motor can be matched with one centrifugal wind wheel or one motor can be matched with a plurality of centrifugal wind wheels.
The cross section total area of the coiled pipe is less than the current 8 copper pipes by three quarters, the countercurrent heat exchange flow is 3 times that of the current fan coil cross flow heat exchange flow, but the wind resistance is not increased but is reduced, although the heat exchange area is reduced, the height of the fan coil is reduced by more than one third compared with the current fan coil, but the windward side wind blocking area is reduced, and the longitudinal corrugation can cause air to form disturbance, so that the turbulence intensity is increased, and the fin heat transfer efficiency is improved. The longitudinal corrugation arrangement not only enhances the air turbulence intensity, but also reduces the dust collection of the fins, the condensed water cannot be reserved, the whole heat exchange efficiency is improved, the volume of the fan coil is reduced, the occupied space for decoration is reduced, and the consumed metal materials are reduced, so that the investment cost and the running cost are reduced.
The foregoing has described in detail the technical solutions provided by the embodiments of the present utility model, and specific examples have been applied to illustrate the principles and implementations of the embodiments of the present utility model, where the above description of the embodiments is only suitable for helping to understand the principles of the embodiments of the present utility model; meanwhile, as for those skilled in the art, according to the embodiments of the present utility model, there are variations in the specific embodiments and the application scope, and the present description should not be construed as limiting the present utility model.
Claims (8)
1. A fan coil device of countercurrent heat exchange is characterized in that: the air inlet position of the reverse-flow type fin coiled pipe heat exchanger is arranged on the reverse-flow type fin coiled pipe heat exchanger, the reverse-flow type fin coiled pipe heat exchanger is horizontally distributed through at least two groups of coiled pipes (1) and is nested into a whole through a group of fins (2) after being overlapped at an upper-lower interval, one end of each group of coiled pipes, which is close to an air outlet, is a coiled pipe medium f inflow opening, one end of each group of coiled pipes, which is close to an air inlet position, is a coiled pipe medium f outflow opening, each coiled pipe medium f inflow opening is communicated with a split manifold (8), the lower end of the split manifold is a medium f inlet, each coiled pipe medium f outflow opening is communicated with a converging manifold (9), the upper end of the converging manifold is a medium f outlet (6), the top of the converging manifold is provided with an exhaust valve (7), and the reverse-flow type fin coiled pipe heat exchanger is integrally arranged in the ventilation volume channel (15) and the air inlet of the ventilation volume channel is connected with the air outlet channel of the fan.
2. A fan coil apparatus for counter-flow heat exchange as set forth in claim 1 wherein: the fins are provided as longitudinal corrugations.
3. A fan coil apparatus for counter-flow heat exchange as set forth in claim 1 wherein: the fan is a centrifugal fan or a cross-flow fan.
4. A fan coil apparatus for counter flow heat exchange as set forth in claim 3 wherein: the centrifugal fan comprises a motor (5) and a centrifugal wind wheel (4), and the centrifugal wind wheel is driven to rotate through a transmission shaft of the motor.
5. A fan coil apparatus for counter-flow heat exchange as set forth in claim 1 wherein: a filter (11) is arranged at the medium f inlet of the distribution manifold.
6. The fan coil apparatus for counter-flow heat exchange of claim 5 wherein: the filter is a Y-shaped filter.
7. A fan coil apparatus for counter-flow heat exchange as set forth in claim 1 wherein: the medium f inlet is communicated with a fan coil medium f inflow pipeline (10), and the medium f outlet is communicated with a fan coil medium f outflow pipeline (16).
8. A fan coil apparatus for counter-flow heat exchange as set forth in claim 1 wherein: the fan coil unit is arranged on the fan coil frame (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322485195.0U CN220852371U (en) | 2023-09-13 | 2023-09-13 | Fan coil device for countercurrent heat exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322485195.0U CN220852371U (en) | 2023-09-13 | 2023-09-13 | Fan coil device for countercurrent heat exchange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220852371U true CN220852371U (en) | 2024-04-26 |
Family
ID=90775371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322485195.0U Active CN220852371U (en) | 2023-09-13 | 2023-09-13 | Fan coil device for countercurrent heat exchange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220852371U (en) |
-
2023
- 2023-09-13 CN CN202322485195.0U patent/CN220852371U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101514829B (en) | Tube-plate evaporative condensing air-conditioning unit with packing | |
| CN106556059A (en) | A kind of calm or breeze air conditioner indoor set | |
| CN105403068A (en) | Dry-wet unified cooling tower adopting natural ventilation and composite running mode and application of dry-wet unified cooling tower | |
| CN105135739A (en) | Multifunctional heat pump type evaporative condensing air-conditioning unit | |
| CN202403359U (en) | Runner-type regenerative cycle evaporative cooling air conditioning unit | |
| CN206531220U (en) | A kind of new heat pipe backboard air-conditioning system | |
| CN220852371U (en) | Fan coil device for countercurrent heat exchange | |
| CN203364293U (en) | Indoor and outdoor air heat exchange device for data center machine room | |
| CN203431984U (en) | Noiseless air condition system | |
| CN206459530U (en) | A kind of anti-freeze type high temperature cold water surface cooler | |
| CN201909557U (en) | Tubular device for producing cold water by means of indirect evaporation and direct evaporation | |
| CN201476415U (en) | Heat exchanger of outdoor unit of air-cooled heat pump air conditioner | |
| CN204555433U (en) | A kind of combination exchanger | |
| CN201069217Y (en) | An ice water efficient energy-saving central air conditioning system | |
| CN208579407U (en) | Fan-coil device | |
| CN201246925Y (en) | Nested sheet type heat radiator | |
| CN202660735U (en) | Indoor split air energy water heater | |
| CN117387400A (en) | Multi-overlapped horizontal-arrangement coiled pipe fin countercurrent heat exchange device | |
| CN202066138U (en) | Waterway serial connected evaporative cooling and air cooling heat pump composited high-temperature cold/hot water unit | |
| CN102705983B (en) | Indoor separate installation type air-energy water heater | |
| CN217235928U (en) | Indirect evaporative cooling unit | |
| CN102564159B (en) | Tubular device and method for producing cold water by means of indirect evaporation and direct evaporation | |
| CN216159168U (en) | Indoor unit of air conditioner | |
| CN203893697U (en) | Evaporation cooler unit applied to direct-current converter station outer cooling system | |
| CN216384679U (en) | Microchannel evaporator device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |