CN219530997U - Fan coil unit with 3+2 calandria structure - Google Patents
Fan coil unit with 3+2 calandria structure Download PDFInfo
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- CN219530997U CN219530997U CN202320554558.9U CN202320554558U CN219530997U CN 219530997 U CN219530997 U CN 219530997U CN 202320554558 U CN202320554558 U CN 202320554558U CN 219530997 U CN219530997 U CN 219530997U
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Abstract
The utility model discloses a fan coil unit with a 3+2 calandria structure, which comprises a return air box, wherein a fan is arranged in the return air box, the fan unit further comprises a refrigeration coil and a heating coil, the refrigeration coil and the heating coil are positioned on the air outlet side of the fan, three rows of heat exchange tubes are arranged on the refrigeration coil, and two rows of heat exchange tubes are arranged on the heating coil. Compared with the traditional four-tube (3+1) fan coil, the fan coil unit with the 3+2 calandria structure has the technical result that: (1) the number of rows of heating coils is increased to increase heating capacity. (2) The ratio of room to cold and hot requirements is satisfied. (3) The heat requirement of a four-pipe system for simultaneously refrigerating and heating all the year round during heating output is met.
Description
Technical Field
The utility model belongs to terminal equipment of an air conditioning system, and mainly relates to a fan coil unit with a 3+2 calandria structure.
Background
At present, public buildings, especially medical buildings, have increasingly larger demands on four-pipe (annual simultaneous cooling and heating) air conditioning systems, and air conditioning equipment manufacturers also aim to develop four-pipe multifunctional cold and hot water units (annual simultaneous cooling and heating) so as to meet market demands. But the terminal fan coil which can not be matched with four-pipe system functions is not available in the domestic air conditioning equipment market at present. The four pipes of the traditional four-pipe fan coil unit are respectively of a cold plate (3 rows) +a hot plate (1 row), and the structure is only suitable for occasions needing heat assistance. In a system for simultaneously supplying cold and heat throughout the year, 1 group of heat trays cannot meet the heating requirement. And the condition that the heating effect is poor or even the heating cannot be performed is caused in the engineering project using the (3+1 row) fan coil.
Disclosure of Invention
The utility model aims at: the fan coil unit with the 3+2 calandria structure solves the problem that the (3+1 row) fan coils cannot meet the heating requirement, provides a tail end fan coil matched with the four-tube air conditioning system, and enables the functions of simultaneously supplying cold and heat all the year round to be better realized.
The aim of the utility model is achieved by the following technical scheme:
the fan coil unit of 3+2 calandria structure, including the return air box, be equipped with the fan in the return air box, still include refrigeration coil and heat the coil, refrigeration coil and heat the air-out side that the coil is located the fan, be equipped with three rows of heat exchange tubes on the refrigeration coil, be equipped with two rows of heat exchange tubes on the heat exchange tube. The double-coil structure is adopted, one group of coils adopts a design of three calandria for refrigeration, the other group of coils adopts a design of two calandria for heating, and the wind pressure in the fan coil is designed to 65Pa so as to overcome the resistance of five calandria. The plane of each row of heat exchange tubes has an inclination angle of 0-30 degrees with the wind direction so as to enlarge the heat exchange area.
Furthermore, the heat exchange tubes on the refrigerating coil and the heating coil are of the same specification and size, and the heat exchange tubes on the refrigerating coil and the heating coil are arranged in parallel at equal intervals, and the number of the heat exchange tubes in each row is the same.
Further, the heat exchange amount on the refrigerating coil and the heat exchange amount on the heating coil are (2.8-3.2): 2.
further, the heat exchange tubes are copper tubes, and the inclination angle between the plane where each row of heat exchange tubes are located and the wind direction is 0-30 degrees.
Furthermore, the heating coil is provided with a hot water inlet pipe interface and a hot water outlet pipe interface, and the refrigerating coil is provided with a chilled water inlet pipe interface and a chilled water outlet pipe interface.
Furthermore, the hot water inlet pipe interface, the hot water outlet pipe interface, the frozen water inlet pipe interface and the frozen water outlet pipe interface are all positioned on the same side.
Furthermore, the hot water inlet pipe interface, the hot water outlet pipe interface, the frozen water inlet pipe interface and the frozen water outlet pipe interface are all provided with stop valves, the hot water outlet pipe interface is provided with a hot water electric two-way valve, the frozen water outlet pipe interface is provided with a cold water electric two-way valve, and the hot water inlet pipe interface and the frozen water inlet pipe interface are all provided with Y-shaped filters.
Furthermore, the hot water inlet pipe interface, the hot water outlet pipe interface, the frozen water inlet pipe interface and the frozen water outlet pipe interface are all communicated with the fan coil through water pipe flexible connecting pipes.
Further, the air return channel in be equipped with the fan, the quantity of fan is not limited to 2, according to fan coil's ventilation volume and decide.
Further, the fan is connected with the motor.
Further, the air inlet of the air return box and the air outlet of the fan coil are connected with soft connecting pipes.
Further, the air return box on be equipped with the water collector, the water collector is located the below of refrigeration coil and heating coil, still includes the comdenstion water outlet pipe that communicates to the water collector inside.
The utility model realizes the following functions: the fan coil in the form of the (3+2) surface cooling disc can meet the refrigerating or heating requirement at any time all the year round, and the cooling and heating brought by the structural form of the (3+2) surface cooling disc is the most reasonable for using the cooling and heating proportion of the room.
Compared with the traditional four-tube (3+1) fan coil, the four-tube fan coil in the (3+2) form has the technical results that: (1) the number of rows of heating coils is increased to increase heating capacity. (2) The ratio of room to cold and hot requirements is satisfied. (3) The heat requirement of a four-pipe system for simultaneously refrigerating and heating all the year round during heating output is met.
The foregoing inventive subject matter and various further alternatives thereof may be freely combined to form a plurality of alternatives, all of which are employable and claimed herein; and the utility model may be freely combined between choices (of non-conflicting choices) and with other choices as well. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or to limit the utility model to the precise forms disclosed.
Drawings
Fig. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 is a top view of the structure of the present utility model.
In the figure: 1. the device comprises a heat exchange tube, 2, a hot water inlet tube interface, 3, a hot water outlet tube interface, 4, a chilled water inlet tube interface, 5, a chilled water outlet tube interface, 6, a fan, 7, a return air box, 8, a soft connecting tube, 9, a water receiving disc, 10, a condensed water outlet tube, 11, a refrigerating coil, 12, a heating coil, 13, a motor, 14, a stop valve, 15, a Y-shaped filter, 16, a water tube soft connecting tube, 17, a hot water electric two-way valve, 18 and a cold water electric two-way valve.
Detailed Description
The utility model will be further described with reference to specific examples and figures.
Referring to fig. 1 and 2, a fan coil unit with a 3+2 calandria structure comprises a heat exchange tube 1, a hot water inlet tube interface 2, a hot water outlet tube interface 3, a chilled water inlet tube interface 4, a chilled water outlet tube interface 5, a fan 6, a return air box 7, a soft connecting tube 8, a water receiving disc 9, a condensed water outlet tube 10, a refrigerating coil 11, a heating coil 12, a motor 13, a stop valve 14, a Y-shaped filter 15, a water tube soft connecting tube 16, a hot water electric two-way valve 17 and a cold water electric two-way valve 18.
The air return box 7 is of a box-type structure of a cuboid and comprises an air inlet and an air return channel, and the air inlet is positioned on the lower plate surface of one end of the air return box 7. Wind enters the return air channel from the air inlet, and after pressurization and refrigeration/heating, the wind in the return air channel is discharged from the air outlet.
The air return box 7 is internally provided with a fan 6 and further comprises a refrigerating coil 11 and a heating coil 12, the refrigerating coil 11 and the heating coil 12 are positioned on the air outlet side of the fan 6, air is sucked into the air return channel through the air inlet by utilizing the air pressure provided by the fan 6, the fan 6 blows air to the refrigerating coil 11 and the heating coil 12, the air exchanges heat with cold water/hot water in the coils, and after refrigeration/heating, the air with a proper temperature is obtained and is discharged into a room from the air outlet.
Three rows of heat exchange tubes 1 are arranged on the refrigerating coil 11, and two rows of heat exchange tubes 1 are arranged on the heating coil 12. The heat exchange tubes 1 are copper tubes, the copper tubes have larger heat transfer coefficients, and the inclination angle of 0-30 degrees exists between the plane where each row of heat exchange tubes 1 are located and the wind direction, so that the coil pipe and the air have more heat transfer areas, and the heat transfer efficiency between the air and the water flow is ensured.
The heat exchange tubes 1 on the refrigerating coil 11 and the heating coil 12 are of the same specification and size, the heat exchange tubes 1 on the refrigerating coil 11 and the heating coil 12 are arranged in parallel in equal rows and columns at intervals, namely the distances among the heat exchange tubes 1 in each row are the same, the tube spacing among the heat exchange tubes 1 in each row is the same, the number of the heat exchange tubes 1 in each row is the same, and the cross sections of the heat exchange tubes 1 are arranged transversely and longitudinally. Through the limitation of the specification, the materials, the arrangement space, the number and the like of the heat exchange tubes 1, the heat exchange amount on the refrigeration coil 11 and the heat exchange amount on the heating coil 12 are ensured to be (2.8-3.2): 2, preferably 3:2.
the heating coil 12 is provided with the hot water inlet pipe connector 2 and the hot water outlet pipe connector 3 so as to supply and discharge hot water into the heating coil 12, and the refrigerating coil 11 is provided with the chilled water inlet pipe connector 4 and the chilled water outlet pipe connector 5 so as to supply and discharge cold water into the refrigerating coil 11, thereby realizing continuous flow of hot water/cold water in the coil and ensuring continuous heat exchange.
The hot water inlet pipe connector 2, the hot water outlet pipe connector 3, the chilled water inlet pipe connector 4 and the chilled water outlet pipe connector 5 are all positioned on the same side, namely, water flows into a water inlet cavity on one side of the coil, flows to a turn-back cavity on the other side of the coil through part of the heat exchange pipe 1, flows back to a water outlet cavity on one side of the coil through the heat exchange pipe 1 on the other part of the heat exchange pipe, and forms a U-shaped tubular heat exchange structure.
And the hot water inlet pipe interface 2, the hot water outlet pipe interface 3, the frozen water inlet pipe interface 4 and the frozen water outlet pipe interface 5 are respectively provided with a stop valve 14 for controlling the on-off and maintenance of the interfaces. The hot water outlet pipe interface 3 is provided with a hot water electric two-way valve 17 for controlling on-off, and the chilled water outlet pipe interface 5 is provided with a cold water electric two-way valve 18 for controlling on-off. The hot water inlet pipe joint 2 and the chilled water inlet pipe joint 4 are both provided with Y-shaped filters 15 for filtering the inlet water. The hot water inlet pipe interface 2, the hot water outlet pipe interface 3, the frozen water inlet pipe interface 4 and the frozen water outlet pipe interface 5 are communicated with the coil pipe through a water pipe soft connecting pipe 16, so that flexible transition is realized.
The blower 6 is arranged in the air return box 7, the number of the blowers 6 is not limited to 2, and the number is determined according to the ventilation quantity of the blower coil pipes. The fan 6 is connected with a motor 13 in the middle, and the motor 13 provides power for the fan 6.
The air inlet of the air return box 7 and the air outlet of the fan coil are both connected with soft connecting pipes 8, so that the flexible communication between the air return box 7 and the fan coil and other pipelines or equipment is realized. The bottom of the fan coil is provided with a water receiving disc 9, the water receiving disc 9 is positioned below the refrigerating coil 11 and the heating coil 12, water drops condensed on the coil fall into the water receiving disc 9 to be collected, and the fan coil further comprises a condensed water outlet pipe 10 communicated to the inside of the water receiving disc 9, and condensed water is discharged through the condensed water outlet pipe 10.
The working flow of the utility model is as follows: the surface cooling coils of the fan coil are divided into two groups, one group is a heating coil which is respectively connected with a hot water inlet pipe interface and a hot water outlet pipe interface, and the other group is a refrigerating coil which is respectively connected with a chilled water inlet pipe interface and a chilled water outlet pipe interface. The heat exchange copper pipe pipes in the heating coil are arranged in two rows, and the heat exchange copper pipe pipes in the refrigerating coil are arranged in three rows.
When the fan coil is in heating operation, the motor and the fan are started, the hot water electric two-way valve is opened, the cold water electric two-way valve is closed, and hot water enters the heating coil to heat air. When the fan coil is in refrigeration operation, the motor and the fan are started, the cold water electric two-way valve is opened, the hot water electric two-way valve is closed, and cold water enters the refrigeration coil to cool air.
The foregoing basic embodiments of the utility model, as well as other embodiments of the utility model, can be freely combined to form numerous embodiments, all of which are contemplated and claimed. In the scheme of the utility model, each selection example can be arbitrarily combined with any other basic example and selection example.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The utility model provides a fan coil unit of 3+2 calandria structure, includes bellows (7), its characterized in that: the air return box (7) in be equipped with fan (6), still include refrigeration coil (11) and heat coil (12), refrigeration coil (11) and heat coil (12) are located the air-out side of fan (6), are equipped with three heat exchange tube (1) on refrigeration coil (11), are equipped with two rows of heat exchange tube (1) on heat coil (12).
2. The 3+2 rack pipe fan-coil unit of claim 1, wherein: the heat exchange tubes (1) on the refrigerating coil (11) and the heating coil (12) are of the same specification and size, the heat exchange tubes (1) on the refrigerating coil (11) and the heating coil (12) are arranged in parallel at equal row and column intervals, and the quantity of the heat exchange tubes (1) in each row is the same.
3. A fan-coil unit of 3+2 gauntlet construction according to claim 1 or 2, characterized in that: the heat exchange amount on the refrigerating coil (11) and the heat exchange amount on the heating coil (12) are (2.8-3.2): 2.
4. the 3+2 rack pipe fan-coil unit of claim 1, wherein: the heat exchange tubes (1) are copper tubes, and the inclination angle of 0-30 degrees exists between the plane where each row of heat exchange tubes (1) are located and the wind direction.
5. The 3+2 rack pipe fan-coil unit of claim 1, wherein: the heating coil (12) is provided with a hot water inlet pipe interface (2) and a hot water outlet pipe interface (3), and the refrigerating coil (11) is provided with a chilled water inlet pipe interface (4) and a chilled water outlet pipe interface (5).
6. The 3+2 rack pipe fan-coil unit of claim 5, wherein: the hot water inlet pipe interface (2), the hot water outlet pipe interface (3), the chilled water inlet pipe interface (4) and the chilled water outlet pipe interface (5) are all positioned on the same side.
7. The 3+2 bank of pipe structured fan coil unit of claim 5 or 6, wherein: the hot water inlet pipe interface (2), the hot water outlet pipe interface (3), the chilled water inlet pipe interface (4) and the chilled water outlet pipe interface (5) are respectively provided with a stop valve (14), the hot water inlet pipe interface (2) and the chilled water inlet pipe interface (4) are respectively provided with a Y-shaped filter (15), the hot water outlet pipe interface (3) is provided with a hot water electric two-way valve (17), and the chilled water outlet pipe interface (5) is respectively provided with a cold water electric two-way valve (18).
8. The 3+2 bank of pipe structured fan coil unit of claim 5 or 6, wherein: the hot water inlet pipe interface (2), the hot water outlet pipe interface (3), the chilled water inlet pipe interface (4) and the chilled water outlet pipe interface (5) are all communicated with the fan coil through a water pipe soft connecting pipe (16).
9. The 3+2 rack pipe fan-coil unit of claim 1, wherein: the air inlet of the return air box (7) and the air outlet of the fan coil are both connected with a soft connecting pipe (8).
10. The 3+2 bank of pipe structured fan coil unit of claim 1 or 9, wherein: the bottom of the fan coil is provided with a water receiving disc (9), the water receiving disc (9) is positioned below the refrigerating coil (11) and the heating coil (12), and the fan coil further comprises a condensed water outlet pipe (10) communicated to the inside of the water receiving disc (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320554558.9U CN219530997U (en) | 2023-03-21 | 2023-03-21 | Fan coil unit with 3+2 calandria structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320554558.9U CN219530997U (en) | 2023-03-21 | 2023-03-21 | Fan coil unit with 3+2 calandria structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219530997U true CN219530997U (en) | 2023-08-15 |
Family
ID=87633517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320554558.9U Active CN219530997U (en) | 2023-03-21 | 2023-03-21 | Fan coil unit with 3+2 calandria structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219530997U (en) |
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2023
- 2023-03-21 CN CN202320554558.9U patent/CN219530997U/en active Active
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