CN210320333U - Large temperature difference fan coil - Google Patents
Large temperature difference fan coil Download PDFInfo
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- CN210320333U CN210320333U CN201920616703.5U CN201920616703U CN210320333U CN 210320333 U CN210320333 U CN 210320333U CN 201920616703 U CN201920616703 U CN 201920616703U CN 210320333 U CN210320333 U CN 210320333U
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Abstract
The utility model relates to a big difference in temperature fan coil, including engine body shell, be equipped with supply water inlet and return water mouth on the engine body shell, one side of engine body shell is equipped with the fan, and one side relative with the fan is equipped with the air outlet, and the engine body shell bottom is equipped with the water-collecting tray, is equipped with the outlet on the water-collecting tray, and the inside heat exchanger device that is equipped with of engine body shell, heat exchanger device include the first group surface cooler and the second group surface cooler that the series combination formed, and the cold and hot water flows into the second group surface cooler again after the heat transfer of first. The utility model has the advantages that: the heat exchanger can realize the temperature difference of 8-16 ℃ between the supply water and the return water on the premise of ensuring the refrigerating capacity of the original conventional fan coil, thereby reducing the circulating water quantity, reducing the selection specification of the supply water and the return water pipe of the air conditioning system, reducing the initial investment and the influence on the installation space, and reducing the water quantity and the flow and the power of the water pump to achieve the reduction of energy consumption.
Description
Technical Field
The utility model relates to a heating and ventilation air conditioner field particularly, relates to a big difference in temperature fan coil.
Background
The fan-coil unit belongs to an indispensable terminal adjusting device of an air-water semi-centralized central air-conditioning system.
The fan coil continuously circulates the air in the space, so that the air continuously passes through the internal heat exchanger in the cold water menstrual period to exchange heat with the air outside the pipe, the air is continuously cooled, and the air is dehumidified to adjust indoor air parameters. At present, the existing air conditioner end devices at home and abroad are matched with a water chilling unit, and under the condition of cooling under the standard working condition (the dry inlet air temperature is 27 ℃, and the wet bulb temperature is 19.5 ℃), the rated inlet water temperature is 7 ℃, the rated outlet water temperature is 12 ℃, and the temperature difference between the supply water and the return water of the chilled water serving as a refrigerant is 5 ℃, as shown in a figure 1-2.
Under the working condition, when the cold energy provided by the equipment needs to meet the load required in engineering design, the required water supply amount is larger, the corresponding pipeline pipe well of the air-conditioning water system is correspondingly increased, and meanwhile, the energy consumption of the circulating water pump of chilled water is higher due to the increase of water flow.
In view of the fact that the central air-conditioning system is high in initial investment and operation cost, the overall air-conditioning system is large in initial investment and operation energy consumption.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem in the correlation technique, the utility model aims at providing a big difference in temperature fan coil, two sets of surface air coolers carry out the heat exchange with the interior air in place space respectively, carry out the step utilization to the refrigerated water, thereby enlarge the difference in temperature of refrigerated water business turn over fan coil, 5 ℃ cold water difference in temperature increase with conventional design is 8 ℃ -16 ℃, but frozen water pump's energy consumption greatly reduced, when adopting the big difference in temperature of cold water, can effectual reduction engineering construction initial cost and later stage fortune dimension cost, can save the building space simultaneously, carry out the step utilization with the frozen water in the system and use the difference in temperature in order to increase business turn over equipment, thereby whole discharge is in order to reduce initial cost and water pump operation energy consumption in the reducible system.
The utility model aims at realizing through the following technical scheme: a large temperature difference fan coil comprises a machine body shell, wherein a water supply port and a water return port are arranged on the machine body shell, a fan is arranged on one side of the machine body shell, an air outlet is arranged at one side opposite to the fan, a water collecting tray is arranged at the bottom of the body shell, a water outlet is arranged on the water collecting tray, the machine body shell is internally provided with a heat exchanger device which comprises a first group of surface coolers and a second group of surface coolers which are combined in series, the first group of surface coolers are provided with a first group of surface cooler water inlets and a first group of surface cooler water outlets, the second group of surface coolers are provided with a second group of surface cooler water inlets and a second group of surface cooler water outlets, the water inlet of the first group of surface coolers is connected with the water supply port, the water outlet of the second group of surface coolers is connected with the water return port, and cold and hot water flows into the second group of surface coolers after being subjected to heat exchange by the first group of surface coolers.
The utility model discloses in when the indoor air when first group surface cooler heat transfer with conventional air conditioner heat transfer principle the same except that reduce the indoor circulating air temperature can realize the function of dehumidification simultaneously, the water supply temperature of second group surface cooler is 12 ℃ in the unit, carry out the reuse of heat exchange to energy in the freezing water once more with the indoor air.
When the air conditioning system is designed, the water flow calculation formula of the air conditioning system is as follows:
(G is air conditioner flow, Q is design air conditioner load, delta t is design air conditioner supply and return water temperature difference)
Knowing that the flow rate is inversely proportional to the temperature difference, for the same load, the required water amount is 1/2 when the temperature difference is doubled;
when the two water pumps convey fluid and the rotating speeds are the same, the relationship among the pump lift H, the flow G and the power N of the water pumps is as follows:
(wherein H and H 'represent the pump lift before and after the change of the temperature difference of the chilled water, respectively; G and G'The flow of the water pump before and after the temperature difference of the chilled water is changed; n and N' are the water pump power before and after the temperature difference of the chilled water is changed) are calculated
When Δ N ═ N' -N ═ (1-0.315) N ═ 0.685 can be obtained; therefore, the power saving rate of the power consumed by the air-conditioning chilled water in the pipeline reaches about 68 percent, the specification of the system pipeline is correspondingly reduced, and the capacity and initial investment of a water pump are obviously reduced.
Furthermore, the heat exchanger device adopts windowing fins, the coils in the heat exchanger device are arranged in a counter-flow mode, and the length proportion of the two groups of coils in the heat exchanger device can be adjusted according to different indoor environment temperature and humidity working conditions to finally achieve the purposes of dehumidification and cooling.
Further, the coils in the heat exchanger device are arranged transversely or/and longitudinally.
Furthermore, the heat exchanger device is suitable for horizontal, vertical and clamping type unit forms.
The utility model has the advantages that: the energy contained in the air-conditioning water system is utilized to the maximum extent by utilizing the energy of the air-conditioning water system in a stepped manner, so that the energy utilization efficiency is improved. The heat exchanger can realize the temperature difference of 8-16 ℃ between the supply water and the return water on the premise of ensuring the refrigerating capacity of the original conventional fan coil, thereby reducing the circulating water quantity, reducing the selection specification of the supply water and the return water pipe of the air conditioning system, reducing the initial investment and the influence on the installation space, and reducing the water quantity and the flow and the power of the water pump to achieve the reduction of energy consumption.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic side view of a conventional fan coil;
FIG. 2 is a schematic view of a prior art fan coil unit showing the structural connections of a surface air cooler;
FIG. 3 is a side view of the large temperature difference fan coil of the present invention with the internal surface air cooler vertically positioned;
FIG. 4 is a side view of the large temperature difference fan coil of the present invention with the internal surface air cooler tilted;
FIG. 5 is a schematic structural view of the large temperature difference fan coil heat exchanger device of the present invention;
fig. 6 is the utility model relates to a big difference in temperature fan coil heat exchanger device schematic structure.
In the figure: 1. a fan; 2. a heat exchanger device; 3. a first group of surface cooler water inlets; 4. a water outlet of the second group of surface coolers; 5. a water collection tray; 6. a water outlet; 7. an air outlet; 8. a body housing; 9. a fin; 10. a water outlet of the first group of surface coolers; 11. and a water inlet of the second group of surface coolers.
Detailed Description
As shown in fig. 3-6, the large temperature difference fan coil according to the embodiment of the present invention comprises a body shell 8, wherein the body shell 8 is provided with a water supply opening and a water return opening, one side of the body shell 8 is provided with a fan 1, the side opposite to the fan 1 is provided with an air outlet 7, the bottom of the body shell 8 is provided with a water collecting tray 5, the water collecting tray 5 is provided with a water outlet 6, the body shell 8 is internally provided with a heat exchanger device 2, the heat exchanger device 2 comprises a first group of surface coolers and a second group of surface coolers formed by series combination, the first group of surface coolers are provided with a first group of surface cooler water inlet 3 and a first group of surface cooler water outlet 10, the second group of surface coolers are provided with a second group of surface cooler water inlet 11 and a second group of surface cooler water outlet 4, the first group of surface cooler water inlet 3 is connected with the water supply opening, and the, and cold and hot water flows into the second group of surface coolers after heat exchange of the first group of surface coolers.
In a specific embodiment, the heat exchanger device 2 adopts a window-opening fin 9, and the coil pipe in the heat exchanger device 2 is arranged in a counter-flow mode.
In a specific embodiment, the coils in the heat exchanger device 2 are arranged in a transverse and/or longitudinal direction.
In a particular embodiment, the heat exchanger device 2 is adapted for use in horizontal, vertical, cassette unit formats.
When specifically using, according to a big difference in temperature fan dish mainly comprise fan 1, heat exchanger device 2, water-collecting tray 5, engine body shell 8, have fin 9 on the heat exchanger device 2. Air conditioner chilled water enters the first group of surface coolers through the first group of surface cooler water inlets 3, and water flows through the first group of surface cooler coil pipes for heat exchange, then enters the second group of surface cooler water inlets 11 through the first group of surface cooler water outlets 10, and then is subjected to heat exchange through the second group of surface cooler coil pipes. The chilled water is connected into a chilled water return pipe of the air conditioning system through a second group of surface cooler water outlets 4 after heat exchange and temperature rise. The indoor air is cooled and dehumidified by the coil pipe with fins and then is sent into the room again through the air outlet 7. Condensed water generated by condensation in the air treatment process is discharged from the water outlet 6 of the water collecting tray 5 and enters a condensed water system in the air conditioning system, wherein fig. 5 shows that the coils of the heat exchanger device 2 are transversely arranged, and fig. 6 shows that the coils of the heat exchanger device 2 are longitudinally arranged.
To sum up, with the help of the above technical scheme of the utility model, the heat exchanger can realize supplying the return water difference in temperature 8 ℃ -16 ℃ under the prerequisite of guaranteeing former conventional fan coil refrigerating capacity to reduce the circulating water yield, reduce the selection for use specification reduction of air conditioning system water supply return pipe and just invest in and to the influence of installation space, the reduction of water yield has reached the reduction of energy consumption to flow, the power reduction of water pump simultaneously.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides a big difference in temperature fan-coil, includes engine body shell (8), its characterized in that: the water supply device is characterized in that a water supply port and a water return port are arranged on the machine body shell (8), a fan (1) is arranged on one side of the machine body shell (8), an air outlet (7) is arranged on one side opposite to the fan (1), a water collecting tray (5) is arranged at the bottom of the machine body shell (8), a water outlet (6) is arranged on the water collecting tray (5), a heat exchanger device (2) is arranged inside the machine body shell (8), the heat exchanger device (2) comprises a first group of surface coolers and a second group of surface coolers which are formed by series combination, a first group of surface cooler water inlet (3) and a first group of surface cooler water outlet (10) are arranged on the first group of surface coolers, a second group of surface cooler water inlet (11) and a second group of surface cooler water outlet (4) are arranged on the second group of surface coolers, the first group of surface cooler water inlet (3) is connected, and cold and hot water flows into the second group of surface coolers after heat exchange of the first group of surface coolers.
2. The large temperature difference fan coil of claim 1, wherein: the heat exchanger device (2) adopts a window type fin (9), and the coil pipe in the heat exchanger device (2) is arranged in a countercurrent mode.
3. The large temperature difference fan coil of claim 1 or 2, wherein: the coil pipes in the heat exchanger device (2) are arranged transversely or/and longitudinally.
4. The large temperature difference fan coil of any of claims 1 or 2, wherein: the heat exchanger device (2) is suitable for horizontal, vertical and clamping type unit forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920616703.5U CN210320333U (en) | 2019-04-30 | 2019-04-30 | Large temperature difference fan coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920616703.5U CN210320333U (en) | 2019-04-30 | 2019-04-30 | Large temperature difference fan coil |
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| CN210320333U true CN210320333U (en) | 2020-04-14 |
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| CN201920616703.5U Active CN210320333U (en) | 2019-04-30 | 2019-04-30 | Large temperature difference fan coil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043966A (en) * | 2019-04-30 | 2019-07-23 | 中建环能建筑工程有限公司 | A kind of big temperature-difference fan coil |
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- 2019-04-30 CN CN201920616703.5U patent/CN210320333U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043966A (en) * | 2019-04-30 | 2019-07-23 | 中建环能建筑工程有限公司 | A kind of big temperature-difference fan coil |
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