Fan coil

Abstract

The utility model discloses a fan coil which comprises a shell, a heat exchange coil assembly arranged in an inner cavity of the shell and a fan assembly arranged on the outer side of the shell. Ventilation openings are formed in the two sides of the shell, the heat exchange coil assembly comprises two surface air coolers which are sequentially arranged in the ventilation direction, and an air outlet of the fan assembly communicates with the ventilation openings in one side of the shell. A partition plate is arranged between the two surface air coolers, and the partition plate partially partitions the inner cavity of the shell and partially communicates with the inner cavity of the shell. By arranging the partition plate, the contact time of air and the two surface air coolers can be effectively prolonged, the heat exchange efficiency of the air and the surface air coolers is improved under the condition that the power of the fan and the density of the heat exchange coil pipe are not increased, and the aerodynamic force noise of the fan coil pipe is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning systems, and more specifically, to a fan coil unit. Background Art

[0002] Fan coil units are usually installed in air conditioning systems. They are mainly composed of small fans and heat exchange coils. They are used to provide a heat exchange relationship between the air returned from the conditioned space to the air conditioning system and the medium in the form of liquid, steam or gas, thereby providing an air environment suitable for human comfort indoors.

[0003] When the fan draws return air into the fan coil unit and pumps it over the heat exchanger coils, it inevitably generates a significant amount of noise. This noise is a combination of aerodynamic and mechanical noise. Mechanical noise depends on the machining, dynamic balancing, and assembly accuracy of rotating components—in other words, product quality. Aerodynamic noise, on the other hand, is solely related to the static pressure and air volume of the supply air. Generally, aerodynamic noise in fan coil units is higher than mechanical noise.

[0004] To improve energy efficiency, existing fan coil units (FCUs) either increase the power of the small fans or increase the density of the heat exchange coils. Increasing the density of the heat exchange coils directly increases the manufacturing cost of the FCU. While increasing the power of the small fans can increase FCU efficiency, it also comes with increased noise and energy consumption.

[0005] Therefore, it is necessary to design a high-efficiency, ultra-quiet multi-cavity fan coil to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a fan coil unit to overcome the above-mentioned defects in the prior art.

[0007] The technical solution for achieving the purpose of the utility model is: a fan coil unit, comprising a shell, a heat exchange coil assembly arranged in the inner cavity of the shell and a fan assembly arranged outside the shell; ventilation holes are provided on both sides of the shell, the heat exchange coil assembly includes two surface coolers arranged in sequence along the ventilation direction, and the air outlet of the fan assembly is connected to the ventilation hole on one side of the shell; a partition is provided between the two surface coolers, and the partition partially separates and partially connects the inner cavity of the shell.

[0008] As a preferred embodiment, the surface cooler includes a heat exchange coil and a plurality of special-shaped fins, and the plurality of special-shaped fins are arranged in parallel and fixed on the heat exchange coil.

[0009] As a preferred embodiment, the special-shaped fins form an inclined angle with the air outlet direction of the fan assembly.

[0010] As a preferred embodiment, the heat exchange coils of the two surface coolers are connected.

[0011] As a preferred embodiment, the special-shaped fin is provided with a plurality of outwardly protruding guide air holes.

[0012] As a preferred embodiment, the two surface coolers are symmetrically arranged along the partition.

[0013] As a preferred embodiment, the fan assembly includes a centrifugal fan fixed to the rear side of the housing, and fan volutes are connected to both ends of the centrifugal fan, and the fan volutes are communicated with the ventilation port on the rear side of the housing.

[0014] As a preferred embodiment, the inner cavity of the shell is provided with a sound insulation filling layer.

[0015] As a preferred embodiment, the sound insulation and heat preservation filling layer includes a porous noise reduction board.

[0016] By adopting the above technical solution, the utility model has the following beneficial effects:

[0017] (1) The utility model can effectively prolong the contact time between the air and the two surface coolers by setting a partition, increase the heat exchange efficiency between the air and the surface cooler without increasing the power of the fan and the density of the heat exchange coil, and effectively reduce the aerodynamic noise of the fan coil.

[0018] (2) The utility model provides multiple tilted special-shaped fins, which divide the airflow into multiple layers, further extending the contact time between the air and the fins, improving the heat exchange efficiency, and reducing aerodynamic noise. The tilted special-shaped fins effectively guide the air.

[0019] (3) The guide air holes on the special-shaped fins of the present invention divide the multi-layer airflow into multiple small airflows when passing through the single-layer fins, thereby increasing the heat exchange area, further improving the heat exchange efficiency, and reducing aerodynamic noise.

[0020] (4) The two surface coolers of the present invention are symmetrically arranged, and the fins symmetrically arranged at an inclination angle can effectively guide the air out of the vent.

[0021] (5) The fan assembly of the utility model can effectively introduce air into the housing and utilize the air for heat exchange.

[0022] (6) The present invention reduces noise while ensuring that the temperature inside the cavity does not lose by providing a sound insulation filling layer inside the shell, and also provides a porous partition to fully reduce noise to a minimum. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0024] Figure 1 It is a three-dimensional diagram of the present utility model.

[0025] Figure 2 It is a three-dimensional diagram of the present utility model.

[0026] Figure 3 This is the internal structure diagram of the utility model.

[0027] Figure 4 A perspective view of a heat exchange coil assembly.

[0028] Figure 5 This is a three-dimensional diagram of the special-shaped fin.

[0029] Figure 6 Schematic diagram of the sound insulation filling layer.

[0030] The numbers in the accompanying drawings are: 1, shell, 1-1, partition; 2, heat exchange coil assembly, 2-1, surface cooler, 2-1-1, heat exchange coil, 2-1-2, special-shaped fin; 3, fan assembly, 3-1, centrifugal fan, 3-2, fan volute; 4, sound insulation filling layer. DETAILED DESCRIPTION

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0037] (Example 1)

[0038] Figure 1 and Figure 2 A fan coil unit includes a shell 1, a heat exchange coil assembly 2, and a fan assembly 3. Ventilation ports are provided on the front and rear sides of the shell 1. The heat exchange coil assembly 2 includes two surface coolers 2-1 fixed in the inner cavity of the shell 1; the two surface coolers 2-1 are arranged in sequence from the rear side to the front side of the shell 1, and a partition 1-1 is provided between the two surface coolers 2-1. The partition 1-1 partially separates and partially connects the inner cavity of the shell 1. The fan assembly 3 includes a centrifugal fan 3-1 fixed on the rear side of the shell 1. The two ends of the centrifugal fan 3-1 are respectively connected to a fan volute 3-2, and the fan volute 3-2 is connected to the ventilation port on the rear side of the shell 1. The partition changes the air circulation path, increases the heat exchange time between the air and the heat exchange coil, increases the heat exchange efficiency, and reduces the noise generated by the air.

[0039] For further information, see Figure 3 and Figure 4 The surface cooler 2-1 includes a heat exchange coil 2-1-1 and a plurality of special-shaped fins 2-1-2. The plurality of special-shaped fins 2-1-2 are arranged in parallel and fixed on the heat exchange coil 2-1-1. The heat exchange coils 2-1-1 of the two surface coolers 2-1 are connected and are respectively connected to the water inlet and the water outlet.

[0040] For further information, see Figure 5 The special-shaped fins 2-1-2 are angled with the ventilation direction on both sides of the housing 1 and are equipped with multiple outward-projecting guide holes. The special-shaped fins of the surface cooler guide air flow, dividing the air passing through the fins into smaller streams through the holes. This reduces the large-amplitude airflow into multiple smaller streams, thereby reducing noise. The holes in the special-shaped fins increase the heat exchange area and effectively reduce wind noise.

[0041] Furthermore, the two surface coolers 2-1 are symmetrically arranged, and the fins symmetrically arranged at inclined angles can effectively guide the discharge of air.

[0042] For further information, see Figure 6 The inner cavity of the shell 1 is provided with a sound-insulating filling layer 4, which includes a porous noise-reducing plate. By providing the sound-insulating filling layer inside the shell, noise is reduced while ensuring that the temperature inside the cavity does not lose, improving heat exchange efficiency, and providing the porous partition, noise is fully minimized.

[0043] In this embodiment, a centrifugal fan is provided at the back side of the fan coil unit, and when the centrifugal fan rotates, external air is brought into the fan coil unit housing.

[0044] When outside air enters the fan coil unit, it first passes through the first surface cooler. As it passes through the surface cooler, the air undergoes a thorough heat exchange, thereby increasing or decreasing the temperature. The large stream of air blown in by the centrifugal fan is divided into multiple streams by the multiple fins as it passes through the surface cooler's fins. The multiple streams are then divided into multiple smaller streams by the holes in the fins as they pass through the single fins. The surface cooler, in turn, directs the air to the next chamber by adjusting the tilt of its fins.

[0045] After passing through the first layer of surface coolers, the air undergoes a heat exchange, and after multiple airflows converge, they pass through the second layer of surface coolers. After passing through the second layer of surface coolers, the air finally leaves the fan coil.

[0046] When air passes through the fan coil cavity, in addition to the surface cooler fins, the air passes through the inner wall porous partition and sound insulation filling layer to achieve effective noise reduction.

[0047] This embodiment is cleverly designed and can effectively improve the heat exchange efficiency of the fan coil and reduce the noise generated without paying too much modification cost, adding heat exchange coils or increasing fan power. The modification is convenient, low-cost and effective.

[0048] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fan coil unit, characterized in that: The invention comprises a shell (1), a heat exchange coil assembly (2) arranged in the inner cavity of the shell (1), and a fan assembly (3) arranged outside the shell (1); ventilation openings are provided on both sides of the shell (1); the heat exchange coil assembly (2) comprises two surface coolers (2-1) arranged in sequence along the ventilation direction; and the air outlet of the fan assembly (3) is connected to the ventilation opening on one side of the shell (1); A partition (1-1) is provided between the two surface coolers (2-1), and the partition (1-1) partially separates and partially communicates the inner cavity of the shell (1).

2. A fan coil unit according to claim 1, characterized in that: The surface cooler (2-1) comprises a heat exchange coil (2-1-1) and a plurality of special-shaped fins (2-1-2), wherein the plurality of special-shaped fins (2-1-2) are arranged in parallel and fixed on the heat exchange coil (2-1-1).

3. A fan coil unit according to claim 2, characterized in that: The special-shaped fins (2-1-2) form an inclined angle with the air outlet direction of the fan assembly (3).

4. The fan coil unit according to claim 2, characterized in that: The heat exchange coils (2-1-1) of the two surface coolers (2-1) are connected.

5. The fan coil unit according to claim 3, characterized in that: The special-shaped fin (2-1-2) is provided with a plurality of outwardly protruding guide air holes.

6. The fan coil unit according to claim 5, characterized in that: The two surface coolers (2-1) are symmetrically arranged along the partition (1-1).

7. The fan coil unit according to claim 1, characterized in that: The fan assembly (3) comprises a centrifugal fan (3-1) fixed to the housing (1), with fan volutes (3-2) connected to both ends of the centrifugal fan (3-1), and the fan volutes (3-2) communicating with a ventilation opening on one side of the housing (1).

8. The fan coil unit according to claim 1, characterized in that: The inner cavity of the shell (1) is provided with a sound insulation filling layer (4).

9. The fan coil unit according to claim 8, characterized in that: The sound insulation filling layer (4) comprises a porous noise reduction board.

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