Air duct structure of fan coil

Abstract

The utility model discloses an air duct structure of a fan coil, which comprises an air duct shell, a return air inlet and an air outlet are arranged on the air duct shell, a drum-type centrifugal fan is arranged in the air duct shell, the return air inlet is arranged at the bottom of the air duct shell and positioned below the drum-type centrifugal fan, and the air outlet is arranged at the bottom of the air duct shell and positioned below the drum-type centrifugal fan. The drum-type centrifugal fan is used for sucking air at the air return opening into the air duct shell, an air guide plate used for guiding the air direction of the air sucked by the drum-type centrifugal fan is arranged in the air duct shell, and the air outlet is formed in the side face, opposite to the drum-type centrifugal fan, of the air duct shell. The drum-type centrifugal fan is adopted to replace a double-end centrifugal fan, the technical limitation that the air inlet amount is limited by the size of an air outlet of the fan is eliminated, the air inlet amount is increased, it is guaranteed that airflow makes full and even contact with the surface air cooler, energy consumption of the fan coil is effectively reduced, the using effect of the fan coil is improved, and the service life of the fan coil is prolonged. And the use comfort is improved.

Description

Technical Field

[0001] The utility model belongs to the field of air conditioning equipment, relates to a fan coil structure technology, and specifically relates to an air duct structure of a fan coil. Background Art

[0002] Fan coil units are usually installed in rooms or floors of buildings. Their working principle is that they are driven by small fans and motors to make air flow through the surface cooler. The chilled water or hot water flowing through the copper tube of the surface cooler exchanges heat with the air outside the tube, thereby achieving air cooling, heating, dehumidification or purification.

[0003] like Figure 1 As shown, the current fan coil unit adopts a double-head centrifugal fan, which has two fan ports, a return air port and an air outlet. The fan body is installed outside the shell, and only the air outlet is connected to the shell air port, and the return air port is in the return air box of the fan body. This fan coil unit structure has a very limited air intake volume in the fan coil unit shell due to the size of the fan outlet being limited. The air outlet is small and the air duct is limited, the air flow is uneven, and it cannot fully contact the surface cooler (heat exchanger). On the one hand, this leads to a large energy consumption of the fan coil unit, and on the other hand, the temperature of the output air flow is uneven and the temperature control accuracy is poor, which affects the use effect of the fan coil unit and the comfort level is poor. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, an air duct structure of a fan coil unit is provided, which adopts a drum-type centrifugal fan instead of a double-head centrifugal fan, thereby eliminating the technical limitation that the air intake is limited by the size of the fan outlet, not only increasing the air intake, but also ensuring sufficient and uniform contact between the airflow and the surface cooler, effectively reducing the energy consumption of the fan coil unit, improving the use effect of the fan coil unit, and improving the use comfort.

[0005] Technical solution: To achieve the above-mentioned purpose, the utility model provides an air duct structure of a fan coil unit, including an air duct shell, the air duct shell is provided with a return air port and an air outlet, a drum-type centrifugal fan is provided in the air duct shell, the return air port is provided at the bottom of the air duct shell and is located below the drum-type centrifugal fan, the drum-type centrifugal fan is used to suck the air at the return air port into the air duct shell, an air guide plate for guiding the wind direction of the air sucked in by the drum-type centrifugal fan is provided in the air duct shell, the air outlet is provided on the side of the air duct shell opposite to the drum-type centrifugal fan, and the air outlet is used to discharge the introduced air.

[0006] Furthermore, two fan mounting parts are arranged on the inner wall of the air duct housing, and mounting rings matching the ends of the drum-type centrifugal fan are arranged on the fan mounting parts, and the two ends of the drum-type centrifugal fan are respectively matched and mounted in the two mounting rings.

[0007] Furthermore, the bottom end of the air guide plate is fixed on the bottom of the air duct housing, and the top end is closely attached to the top of the air duct housing.

[0008] Furthermore, the air guide plate and the air outlet are respectively located on two sides of the drum-type centrifugal fan.

[0009] Furthermore, a drainage hole is provided at a bottom side end of the air duct housing.

[0010] Furthermore, the top of the air duct housing is a cover plate, and the cover plate is fixed to the air duct housing by screws. The detachable cover plate structure is designed to facilitate opening the air duct housing for repair and maintenance.

[0011] The design principle of the utility model is: a drum-type centrifugal fan is used instead of a double-head centrifugal fan. The drum-type centrifugal fan has no return air port and air outlet, and it drives the airflow to move in a rolling manner. With the design of the air guide plate, the airflow can be evenly and fully directed to the cooler in the air duct shell. This structural design eliminates the size setting limitation of the return air port on the air duct shell, thereby increasing the air intake volume, thus reducing energy consumption. Moreover, the airflow flows to the cooler in a horizontally relative direction, which can increase the contact area between the airflow and the cooler, ensuring full and comprehensive contact, and ensuring the airflow uniformity and temperature accuracy of the final air outlet.

[0012] Beneficial effect: Compared with the prior art, the utility model adopts a drum-type centrifugal fan instead of a double-head centrifugal fan, eliminating the technical limitation that the air intake is limited by the size of the fan outlet. It not only increases the air intake, but also ensures sufficient and uniform contact between the airflow and the surface cooler, effectively reduces the energy consumption of the fan coil, improves the use effect of the fan coil, and improves the comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of a fan coil unit with an existing double-head centrifugal fan type;

[0014] Figure 2 It is a schematic diagram of the planar structure of the utility model;

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0017] like Figure 2 and Figure 3 As shown, the utility model provides an air duct structure of a fan coil unit, including an air duct housing 1 and a surface cooler (not shown in the figure) arranged in the air duct housing 1, a drum-type centrifugal fan 2 is arranged in the air duct housing 1, and fan mounting parts 3 are arranged on the two side walls 15 in the air duct housing 1, and the fan mounting parts 3 are provided with mounting rings 31 matching the ends of the drum-type centrifugal fan 2, and the two ends of the drum-type centrifugal fan 2 are respectively matched and installed in the two mounting rings 31, and the air duct housing 1 is provided with a return air port 11 and an air outlet 12, and the return air port 11 is arranged at the bottom of the air duct housing 1 and is located below the drum-type centrifugal fan 2. An air guide plate 4 for guiding the wind direction of the air inhaled by the drum-type centrifugal fan 2 is arranged in the air duct housing 1, and an air outlet 12 is arranged on the side of the air duct housing 1 opposite to the drum-type centrifugal fan 2. The air guide plate 4 and the air outlet 12 are respectively located on both sides of the drum-type centrifugal fan 2. A drainage hole 14 is arranged on the bottom side end of the air duct housing 1. The top of the air duct housing 1 is a cover plate 13, and the cover plate 13 is fixed to the air duct housing 1 by screws. The bottom end of the air guide plate 4 is fixed to the bottom of the air duct housing 1, and the top end is tightly against the cover plate 13. The surface cooler is located between the drum-type centrifugal fan 2 and the air outlet 12.

[0018] In this embodiment, the fan coil structure is applied as an example, and the operation process is as follows: first, the drum centrifugal fan 2 is started, and the drum centrifugal fan 2 sucks the air at the return air port 11 into the air duct housing 1 by rotating. Under the rolling force of the drum centrifugal fan 2 and the guiding effect of the air guide plate 4, the air forms an airflow toward the surface cooler. The airflow direction is as follows: Figure 2 As shown in the direction of the arrow in FIG. 1 , the airflow contacts the surface cooler to achieve heat exchange, and is finally output to the room through the air outlet 12.

[0019] In actual application of the above-mentioned fan coil structure, due to the operating mode of the drum centrifugal fan 2, it does not need an air inlet and an air outlet, so that the position and size of the return air outlet 11 of the air duct housing 1 are no longer limited, and the length and width of the return air outlet 11 can be equal to or greater than the length and width of the drum centrifugal fan 2, so that the air intake volume is greatly increased, and the airflow formed by the drum centrifugal fan 2 in cooperation with the air guide plate 4 flows to the surface cooler in a horizontal relative direction, which can increase the contact area between the airflow and the surface cooler, ensure full and comprehensive contact, and ensure the airflow uniformity and temperature accuracy of the air outlet 12, effectively reducing the energy consumption of the fan coil, improving the use effect of the fan coil, and improving the comfort of use.

Claims

1. An air duct structure of a fan coil unit, comprising an air duct housing, wherein the air duct housing is provided with a return air port and an air outlet, wherein: A drum-type centrifugal fan is arranged in the air duct housing, the return air port is arranged at the bottom of the air duct housing and below the drum-type centrifugal fan, the drum-type centrifugal fan is used to suck the air at the return air port into the air duct housing, the air duct housing is provided with an air guide plate for guiding the wind direction of the air sucked in by the drum-type centrifugal fan, the air outlet is arranged on the side of the air duct housing opposite to the drum-type centrifugal fan, and the air outlet is used to discharge the introduced air.

2. The air duct structure of a fan coil unit according to claim 1, characterized in that: Two fan mounting parts are arranged on the inner wall of the air duct housing, and mounting rings matching the ends of the drum-type centrifugal fan are arranged on the fan mounting parts. The two ends of the drum-type centrifugal fan are respectively matched and mounted in the two mounting rings.

3. The air duct structure of a fan coil unit according to claim 1, characterized in that: The bottom end of the air guide plate is fixed on the bottom of the air duct housing, and the top end is closely attached to the top of the air duct housing.

4. The air duct structure of a fan coil unit according to claim 1, characterized in that: The air guide plate and the air outlet are respectively located on both sides of the drum-type centrifugal fan.

5. The air duct structure of a fan coil unit according to claim 1, characterized in that: A drainage hole is arranged at the bottom side end of the air duct housing.

6. The air duct structure of a fan coil unit according to claim 1, characterized in that: The top of the air duct housing is a cover plate, and the cover plate is fixed on the air duct housing by screws.

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