CN106839086B - Fan coil unit - Google Patents
Fan coil unit Download PDFInfo
- Publication number
- CN106839086B CN106839086B CN201510839404.4A CN201510839404A CN106839086B CN 106839086 B CN106839086 B CN 106839086B CN 201510839404 A CN201510839404 A CN 201510839404A CN 106839086 B CN106839086 B CN 106839086B
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- China
- Prior art keywords
- heat exchanger
- end plate
- fan
- air inlet
- plane
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/20—Casings or covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
Abstract
The invention relates to a fan-coil unit, which comprises a fan and a coil, wherein the coil comprises a shell and a heat exchanger positioned in the shell, an air inlet is formed in the shell and a front end plate, an air outlet is formed in the rear end plate, the air inlet is close to the upper side edge of the front end plate, the air outlet of the fan is butted with the air inlet of the shell, the distance between the windward side of the heat exchanger and the front end plate is larger than the distance between the leeward side of the heat exchanger and the rear end plate, and the angle between the front inclined plane and the plane of a bottom plate is larger than the angle between the. The structural design of the heat exchanger and the bottom plate ensures that airflow flows more smoothly after entering the shell from the air inlet, is fully diffused, and smoothly and uniformly reaches the heat exchanger after the air speed is reduced, so that the generation of fin sound and resonance of the heat exchanger can be avoided, and the noise value is reduced. Moreover, the airflow is fully diffused and then uniformly reaches the heat exchanger, so that the heat exchange effect of the heat exchanger is greatly improved, and the heat exchange effect is improved by about 10%.
Description
Technical Field
The invention relates to the technical field of air temperature regulation, in particular to a fan coil applied to an air conditioning system.
Background
The fan coil as the end equipment of central air conditioning system is one air conditioner with fan and heat exchange coil assembled together and is used widely in shopping malls, hospitals, office buildings, hotels, etc. With the continuous improvement of the national standard of living, especially in places such as hotels where the requirements for noise and abnormal sounds are high, the reduction of noise and the elimination of abnormal sounds are particularly important.
The structure of the existing fan coil is shown in fig. 1 and fig. 2, and comprises a fan 1 and a coil, wherein the coil comprises a shell and a heat exchanger 2 positioned in the shell, an air inlet is formed in a front end plate 31 of the shell opposite to the fan 1, an air outlet is formed in a rear end plate 32 of the shell opposite to the front end plate 31, and the distances from the heat exchanger 2 to the front end plate 31 and the rear end plate 32 are the same. The bottom plate 33 of the housing comprises a front inclined plane, a plane and a rear inclined plane which are sequentially connected, the included angle between the front inclined plane and the plane is the same as the included angle between the rear inclined plane and the plane, and the projection area of the front inclined plane in the plane direction is the same as the projection area of the rear inclined plane in the plane direction.
As shown in fig. 1, the airflow generated by the fan enters the housing from the air inlet and blows horizontally towards the heat exchanger 2, and the airflow is concentrated at the position of the upper part 1/2 of the unit, and the lower part of the unit has only little diffused airflow, which results in the following effects:
(1) Because upper portion air current wind speed is high, the fin interval of heat exchanger only 1.4 ~ 1.7.7 mm to there is the fluting on the fin, the air current blows to the heat exchanger after the effect that produces and blow the whistle, lead to the noise high and have the fin sound, and the fin of heat exchanger takes place resonance with the casing easily, produces great noise.
(2) Because the air current only concentrates on upper portion, so the heat transfer effect on heat exchanger upper portion is better through wind and refrigerated water heat transfer, and the air current of lower part only has less diffusion air current, so heat transfer effect greatly reduced of cold, the heat that can't fully trade the heat exchanger leads to the heat transfer effect of whole heat exchanger poor.
As shown in fig. 2, the heat exchanger is installed at the center of the unit, the distance d from the air outlet of the fan to the heat exchanger is short, and the airflow cannot be fully diffused, so that the following consequences are caused:
(1) The airflow can not be fully diffused and reaches the heat exchanger, so that the air speed of the airflow is high, the fin spacing of the heat exchanger is only 1.4 ~ 1.7.7 mm, and the fins are provided with grooves, so that the airflow blows to the heat exchanger to generate a whistle blowing effect, and the noise is high and fin sound is generated.
(2) The air flow can not be fully diffused to reach the heat exchanger, the middle distance e of the heat exchanger is not blown by wind, and cold and heat of the heat exchanger can not be fully exchanged, so that the heat exchange effect is greatly reduced, and the heat exchange effect of the whole heat exchanger is poor.
The angle between the front inclined plane and the plane of the bottom plate is the same as that between the rear inclined plane and the plane, and the angle is steeper, so that the angle of airflow entering the heat exchanger at the bottom of the unit is too large, the airflow resistance is large, the airflow direction changes suddenly, abnormal sound is generated, and the noise value is increased.
Therefore, how to reduce the noise of the wind plate and eliminate the fin sound is a technical problem to be solved.
Disclosure of Invention
The invention aims to provide a fan coil unit, which solves the technical problems of high noise and poor heat exchange effect of the existing fan coil unit.
In order to solve the technical problems, the invention adopts the following technical scheme:
A fan-coil unit comprises a fan and a coil, wherein the coil comprises a shell and a heat exchanger positioned in the shell, an air inlet is formed in a front end plate of the shell, which is opposite to the fan, an air outlet is formed in a rear end plate of the shell, which is opposite to the front end plate, the air inlet is close to the upper side edge of the front end plate, the air outlet of the fan is butted with the air inlet of the shell, the distance between the windward side of the heat exchanger and the front end plate is L1, the distance between the leeward side of the heat exchanger and the rear end plate is L2, and L1 is greater than L2; the bottom plate of casing is including the preceding inclined plane, plane and the back inclined plane that meet in proper order, preceding inclined plane with the front end plate meets, the back inclined plane with the back end plate meets, the angle between preceding inclined plane and the plane is greater than the angle between back inclined plane and the plane.
The fan coil assembly is characterized in that L1/L2 is more than or equal to 1.5 and less than or equal to 2.5; the projection proportion of the front inclined plane, the plane and the rear inclined plane in the plane direction is 10: 9: 3-12:9: 5.
The fan coil unit as described above, the angle between the front bevel and the plane is between 150 ° and 170 °.
In the fan-coil unit, the ratio of the height of the air inlet to the height of the front end plate is 3/5-4/5; the ratio of the air inlet area of the air inlet to the area of the windward side of the heat exchanger is 1/4-1/3.
In the fan-coil unit, the number of the air inlets is the same as that of the fans, and when a plurality of air inlets are arranged, the ratio of the distance between adjacent air inlets to the width of the air inlets is 1/2-3/4.
According to the fan coil assembly, the flow deflector is arranged in the shell and fixed on the inner side surface above the air inlet of the front end plate.
The fan coil assembly comprises a guide vane and a front end plate, wherein the guide vane comprises a plane guide part and an inclined guide part which are connected, the plane guide part is fixed on the inner side surface above the air inlet of the front end plate, and the inclined guide part inclines towards the direction of the bottom plate.
The fan coil assembly as described above, wherein the angle between the planar flow guide and the inclined flow guide is between 120 ° and 170 °.
The fan coil assembly is characterized in that the area ratio of the projection of the inclined plane diversion part in the direction of the air inlet to the air inlet is 1/12-1/10.
In the fan coil assembly as described above, a ratio of a maximum distance between the baffle and the front end plate to a distance between the heat exchanger and the front end plate is between 1/8 and 1/6.
Compared with the prior art, the invention has the advantages and positive effects that: the distance between the windward side and the front end plate of the heat exchanger is larger than the distance between the leeward side and the rear end plate, and the structural design of the bottom plate is matched, so that airflow flows more smoothly after entering the shell from the air inlet, can be fully diffused and uniformly reaches the heat exchanger, the air speed of the airflow passing through the heat exchanger is reduced, and the airflow smoothly passes through the heat exchanger, so that the generation of fin sound and resonance of the heat exchanger can be avoided, and the noise value is reduced. Moreover, airflow uniformly reaches the heat exchanger after being fully diffused, the heat exchange effect of the heat exchanger is greatly improved, and the heat exchange effect is improved by about 10%.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
fig. 1 is a schematic structural diagram of a fan coil unit in the background art.
FIG. 2 is a top view of a prior art fan coil unit.
FIG. 3 is a schematic view of a fan-coil unit according to an embodiment of the present invention.
FIG. 4 is a top view of a fan coil unit according to an embodiment of the present invention
Detailed Description
the following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 3 and 4, the present embodiment provides a fan-coil unit, which includes a fan 1 and a coil. The coil comprises a housing 3 and a heat exchanger 2 located within the housing 3.
The housing 3 is a rectangular parallelepiped, and includes a front end plate 31, a rear end plate 32, a bottom plate 33, a top plate, and left and right side plates. The fan 1 is opposed to the front end plate of the casing 3.
An air inlet 311 is formed in the front end plate 31 of the housing 3, an air outlet of the fan 1 is matched with the air inlet 311 of the front end plate 31, the air outlet of the fan 1 is butted with the air inlet 311 of the housing 3, and air flow generated by the fan 1 enters the housing through the air inlet 311 and exchanges heat with the heat exchanger 2 when reaching the heat exchanger 2. Wherein the air inlet 311 is near the upper side edge of the front plate 31.
An air outlet 321 is formed in the rear end plate 32 of the housing 3 opposite to the front end plate 31, and the air flow exchanging heat with the heat exchanger 2 is blown out from the air outlet 321, so that the effect of changing the ambient temperature is achieved.
The heat exchanger 2 is positioned in the shell 3 and is parallel to the front end plate 31 and the rear end plate 32 of the shell 3, the distance between the windward side of the heat exchanger 2 and the front end plate 31 is L1, the distance between the leeward side of the heat exchanger 2 and the rear end plate 32 is L2, and L1 is larger than L2. Preferably, 1.5. ltoreq.L 1/L2. ltoreq.2.5. The position design of the heat exchanger 2 can improve the smoothness and uniformity of the air flow after entering the shell, so that the air flow can uniformly reach the heat exchanger and rapidly flow out of the air outlet after fully exchanging heat with the heat exchanger. Because the air speed of the air flow passing through the heat exchanger is reduced, the air flow smoothly passes through the heat exchanger, the generation of fin sound of the heat exchanger can be avoided, and the heat exchange efficiency is improved. Meanwhile, due to the design of the position of the heat exchanger, the heat exchanger cannot resonate with the shell, and therefore noise generated by the resonance of the fins of the heat exchanger and the shell can be avoided.
The bottom plate 33 of the housing 3 comprises a front inclined surface 331, a flat surface 332 and a rear inclined surface 333 which are sequentially connected, wherein the front inclined surface 331 is connected with the front end plate 31, the rear inclined surface 333 is connected with the rear end plate 32, and the angle between the front inclined surface 331 and the flat surface 332 is larger than the angle between the rear inclined surface 333 and the flat surface 332. Preferably, the angle between the front bevel 331 and the plane 332 is between 150 ° and 170 °. The projection ratio of the front inclined plane 331, the plane 332 and the rear inclined plane 333 in the direction of the plane 332 is 10: 9: 3-12:9: 5. The angle between the front inclined plane 331 and the plane 332 of the bottom plate 33 is larger than the angle between the rear inclined plane 333 and the plane 332, so that the angle of the air flow entering the heat exchanger 2 at the bottom of the shell 3 is reduced, the angle of the front inclined plane 331 is consistent with the direction of the air flow, the fin sound is eliminated, and the noise value is reduced. The angle between the rear inclined plane 333 and the plane 332 is reduced, and airflow reaches the air outlet along the rear inclined plane 333 after passing through the heat exchanger 2, so that the air outlet speed of the air outlet can be increased, and the heat exchange efficiency can be improved.
The heat exchanger 2 is located above the plane 332, due to the position design of the heat exchanger 2 and the structural design of the bottom plate, after the air flow generated by the fan 1 enters the shell 3 from the air inlet 311, the air flow can smoothly flow to the heat exchanger 2 along the front inclined surface 331 of the bottom plate 3, the air flow can be fully diffused and then uniformly reaches the heat exchanger 2, the air speed of the air flow passing through the heat exchanger 2 is reduced, the generation of fin sound and resonance of the heat exchanger 2 can be avoided, and the noise value is reduced.
In order to further reduce noise, the embodiment designs the position and the size of the air inlet, and the ratio of the height of the air inlet 311 to the height of the front end plate 31 is 3/5-4/5; the ratio of the air inlet area of the air inlet 311 to the area of the windward side of the heat exchanger 2 is 1/4-1/3. The design of the position and the size of the air inlet 311 and the cooperation of the heat exchanger 2 and the bottom plate 33 can ensure that the air flow is uniformly distributed on the windward side of the whole heat exchanger 2, and the heat exchange effect of the heat exchanger 2 is improved while the noise is reduced.
The number of the air inlets 311 is the same as that of the fans 1 and corresponds to one another. The number of the fans 2 is two, and the number of the air inlets on the front end plate 31 is also two. The ratio of the distance between the two intake vents 311 to the width of the intake vents 311 is between 1/2 and 3/4. The abnormal sound generated by the mutual interference of the air inlet when the two fans 2 operate can be avoided, and the air supply efficiency of the fans can be improved.
A baffle 4 is arranged in the housing 3, and the baffle 4 is fixed on the inner side surface above the air inlet 311 of the front end plate 31. The guide vanes 4 enable the air flow operation curve to be more reasonable and accord with the Archimedes spiral line of the fan 1, so that the air speed reaching the heat exchanger 2 is reduced, the air supply is more uniform, and the fin sound is eliminated.
The flow deflector 4 includes a planar flow guiding portion 41 and an inclined flow guiding portion 42 connected to each other, the planar flow guiding portion 41 is fixed on the inner side surface above the air inlet 311 of the front end plate 31, and the inclined flow guiding portion 42 is inclined toward the bottom plate 33.
The included angle between the plane flow guide part 41 and the inclined plane flow guide part 42 is 120-170 degrees.
The area ratio of the projection of the inclined plane guide part 42 in the direction of the air inlet 311 to the air inlet 311 is 1/12-1/10; the ratio of the maximum distance between the guide vane and the front end plate to the distance between the heat exchanger and the front end plate is between 1/8 and 1/6. The structural design of the flow deflector 2 can further play a role in guiding the airflow of the fan 1, the airflow can smoothly flow to the heat exchanger 2 along the flow deflector 2 and the front inclined surface 331 of the bottom plate 3, the airflow can uniformly reach the heat exchanger 2 after being sufficiently diffused, the airflow speed passing through the heat exchanger 2 is reduced, the generation of fin sound and resonance of the heat exchanger 2 can be avoided, the noise value is reduced, meanwhile, the airflow can be uniformly distributed to the windward side of the whole heat exchanger 2, and the noise is reduced while the heat exchange effect of the heat exchanger 2 is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A fan-coil unit comprises a fan and a coil, wherein the coil comprises a shell and a heat exchanger positioned in the shell, an air inlet is formed in a front end plate of the shell, which is opposite to the fan, an air outlet is formed in a rear end plate of the shell, which is opposite to the front end plate, the air inlet is close to the upper side edge of the front end plate, and the air outlet of the fan is butted with the air inlet of the shell, and the fan-coil unit is characterized in that the distance between the windward side of the heat exchanger and the front end plate is L1, the distance between the leeward side of the heat exchanger and the rear end plate is L2, and L1 is more than L2; the bottom plate of the shell comprises a front inclined plane, a plane and a rear inclined plane which are sequentially connected, the front inclined plane is connected with the front end plate, the rear inclined plane is connected with the rear end plate, the angle between the front inclined plane and the plane is larger than the angle between the rear inclined plane and the plane, and the projection proportion of the front inclined plane, the plane and the rear inclined plane in the plane direction is 10: 9: 3-12:9: 5; the angle between the front bevel and the plane is between 150 and 170 degrees.
2. The fan-coil unit of claim 1, wherein L1/L2 is 1.5 ≤ L1/L2 ≤ 2.5.
3. The fan coil unit of claim 1, wherein a ratio of a height of the air inlet to a height of the front end panel is between 3/5-4/5; the ratio of the air inlet area of the air inlet to the area of the windward side of the heat exchanger is 1/4-1/3.
4. The fan-coil unit of claim 1, wherein the number of the inlet vents is the same as the number of the fans, and wherein when a plurality of inlet vents are provided, the ratio of the distance between adjacent inlet vents to the width of the inlet vents is between 1/2-3/4.
5. The fan-coil unit of claim 1, wherein a baffle is disposed within the housing and secured to an inner side of the front end plate above the air inlet.
6. The fan-coil unit of claim 5, wherein the deflector comprises a planar deflector portion and a beveled deflector portion connected to each other, the planar deflector portion being secured to the inner side surface of the front end plate above the air inlet, the beveled deflector portion being inclined toward the base plate.
7. the fan coil unit of claim 6, wherein the angle between the planar and angled fairings is between 120 ° and 160 °.
8. The fan coil unit of claim 6, wherein a projection of the angled deflector in the direction of the air inlet opening has an area ratio to the air inlet opening of between 1/12-1/10.
9. The fan coil unit of claim 6, wherein a ratio of a maximum distance between the baffle and the front end plate to a distance between the heat exchanger and the front end plate is between 1/8-1/6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510839404.4A CN106839086B (en) | 2015-11-27 | 2015-11-27 | Fan coil unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510839404.4A CN106839086B (en) | 2015-11-27 | 2015-11-27 | Fan coil unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106839086A CN106839086A (en) | 2017-06-13 |
| CN106839086B true CN106839086B (en) | 2019-12-17 |
Family
ID=59148454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510839404.4A Active CN106839086B (en) | 2015-11-27 | 2015-11-27 | Fan coil unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106839086B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021082328A1 (en) | 2019-10-30 | 2021-05-06 | 广东美的制冷设备有限公司 | Air conditioner indoor unit and air conditioner |
| CN111811045B (en) * | 2020-06-10 | 2021-10-22 | 山东中威空调设备集团有限公司 | Fan coil for air supply system of air conditioner |
| WO2024037083A1 (en) * | 2022-08-18 | 2024-02-22 | 青岛海信日立空调系统有限公司 | Air conditioner, centrifugal fan, and air conditioner indoor unit |
| CN115342441A (en) * | 2022-08-19 | 2022-11-15 | 青岛海信日立空调系统有限公司 | Air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202012988U (en) * | 2011-04-20 | 2011-10-19 | 浙江国祥空调设备有限公司 | Fan coil unit with three rows of tubes |
| CN202532619U (en) * | 2012-04-01 | 2012-11-14 | 北京振兴华龙制冷设备有限责任公司 | Ultra low noise and energy-saving type fan coil unit |
| CN104566636A (en) * | 2013-10-28 | 2015-04-29 | 珠海格力电器股份有限公司 | Air duct machine and air conditioner provided with air duct machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100223528B1 (en) * | 1997-06-21 | 1999-10-15 | 박승환 | Calm airconditioner |
-
2015
- 2015-11-27 CN CN201510839404.4A patent/CN106839086B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202012988U (en) * | 2011-04-20 | 2011-10-19 | 浙江国祥空调设备有限公司 | Fan coil unit with three rows of tubes |
| CN202532619U (en) * | 2012-04-01 | 2012-11-14 | 北京振兴华龙制冷设备有限责任公司 | Ultra low noise and energy-saving type fan coil unit |
| CN104566636A (en) * | 2013-10-28 | 2015-04-29 | 珠海格力电器股份有限公司 | Air duct machine and air conditioner provided with air duct machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106839086A (en) | 2017-06-13 |
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