Fan coil with noise elimination function

Abstract

The utility model discloses a fan coil with a noise elimination function. The fan coil comprises a fan, a heat exchanger integrated in a case and a drainage disc located below the heat exchanger. A water outlet assembly and a water supply assembly are arranged on the outer wall of the case; one end of the water supply assembly communicates with an external water conveying pipe, and the other end of the water supply assembly communicates with the water inlet end of the heat exchanger. An air outlet of the fan is communicated with the heat exchanger; a shock absorption bracket is arranged below the fan; a plurality of groups of damping springs are mounted on the shock absorption bracket; a shell of the fan is sleeved with a silencing outer cover; a noise reduction assembly is arranged at an air outlet in the case and adopts a micro-perforated plate. The shock absorption support and the silencing outer cover are arranged at the position of the fan, and the noise reduction assembly is arranged at the air outlet of the heat exchanger, so that noise can be reduced efficiently.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan coil units, and in particular relates to a fan coil unit with a sound-absorbing function. Background Art

[0002] The fan coil unit is the terminal device of the air conditioning system. Its working principle is to continuously recirculate the air in the room within the unit, so that the air is cooled (heated) after passing through the cold water (hot water) coil to maintain a constant room temperature.

[0003] As a major noise source, how to reduce the noise of indoor air conditioners has become a problem that air conditioner designers and installers must consider. As an important component of the air conditioning system, the problem of excessive indoor noise is mostly caused by the noise transmitted from the air inlet and outlet. How to reduce the noise generated during its operation is one of the quality standards for testing fan coil units. Utility Model Content

[0004] In view of the deficiencies and difficulties in the prior art, the utility model aims to provide a fan coil unit with a sound-absorbing function.

[0005] The utility model is implemented through the following technical solutions:

[0006] A fan coil unit with a muffler function comprises a fan, a heat exchanger integrated in a chassis, and a drain pan located below the heat exchanger; a water outlet assembly and a water supply assembly are arranged on the outer wall of the chassis; one end of the water supply assembly is connected to an external water delivery pipe, and the other end is connected to a water inlet end of the heat exchanger; one end of the water outlet assembly is connected to a water outlet end of the heat exchanger, and the other end is connected to an external water delivery pipe;

[0007] The air outlet of the fan is connected with the heat exchanger; a shock absorbing bracket is arranged under the fan, and a plurality of shock absorbing springs are installed on the shock absorbing bracket; a sound-absorbing cover is sleeved on the outer shell of the fan; a noise reduction component is arranged on the air outlet of the chassis, and the noise reduction component adopts a micro-perforated plate.

[0008] Furthermore, the shock absorbing spring adopts an air spring.

[0009] Furthermore, the sound-absorbing outer cover adopts an aluminum honeycomb panel; the aluminum honeycomb panel includes two layers of upper and lower elastic panels with a honeycomb aluminum core in the middle.

[0010] Furthermore, the elastic panel of the aluminum honeycomb panel can be made of aluminum skin board, and the panel and honeycomb core of the aluminum honeycomb panel are both made of aluminum material with high thermal conductivity, thereby achieving efficient heat dissipation effect.

[0011] Furthermore, the aluminum sheet adopts a fluorocarbon coated aluminum sheet.

[0012] Furthermore, the outer wall of the micro-perforated plate is provided with a sound insulation coating, and the sound insulation coating of the sound insulation coating is a nano multi-layer structure material.

[0013] Furthermore, the copper tube of the heat exchanger adopts a U-shaped spiral tube, one end of the U-shaped spiral tube is connected to the water outlet component, and the other end is connected to the water supply component.

[0014] Furthermore, the fan adopts a centrifugal fan with an eccentric air inlet.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model arranges a shock-absorbing bracket and a sound-absorbing cover at the fan position, and arranges a noise reduction component at the air outlet of the heat exchanger, which can effectively reduce noise and silence noise.

[0017] 2. The utility model sets a shock-absorbing bracket under the fan to reduce vibration and noise from the vibration source, and the shock-absorbing action area of ​​the air spring is the rubber airbag part in the middle, which has extremely low vibration conductivity, and the frequency transmitted from the upper end cover to the lower end cover can be greatly reduced.

[0018] 3. The utility model arranges an aluminum honeycomb panel as a sound-absorbing outer cover. The aluminum honeycomb panel has good toughness and strong impact resistance, can absorb most of the energy through its own deformation, and has a good vibration reduction effect.

[0019] 4. The utility model sets a micro-perforated plate at the air outlet. The micro-perforated plate is a plate with a certain number of holes drilled on it, and a certain air layer is left behind the plate, so that the incident sound waves are resonantly absorbed, thereby achieving a sound absorption effect.

[0020] 5. The copper tube of the utility model is provided with a U-shaped spiral tube. Under the guidance of the spiral tube, the water flows along the tube body in a spiral oblique straight line without generating a strong impact on the inner wall thereof, so the noise is relatively small.

[0021] 6. The air inlet of the fan in the utility model is not on the same horizontal line as the central axis of the impeller. The eccentric design of the air inlet of the air duct has a certain effect on improving the air flow distribution in the air duct and can effectively reduce the noise generated by the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a schematic structural diagram of a fan coil unit with a noise reduction function.

[0023] Figure 2 It is a schematic diagram of the structure of the water pipe of the heat exchanger in the utility model.

[0024] Illustration: 1-fan, 2-chassis, 3-water outlet assembly, 4-water supply assembly, 5-noise reduction assembly, 6-drain pan, 7-copper pipe, 8-silencer cover, 9-shock absorbing bracket. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and beneficial effects of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present utility model.

[0029] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0030] like Figure 1 and Figure 2 As shown, a fan coil unit with a silencer function comprises a fan 1, a heat exchanger (not marked in the figure) integrated in a chassis 2, and a drain pan 6 located below the heat exchanger; a water outlet assembly 3 and a water supply assembly 4 are arranged on the outer wall of the chassis 2; one end of the water supply assembly 4 is connected to an external water delivery pipe, and the other end is connected to a water inlet end of the heat exchanger; one end of the water outlet assembly 3 is connected to a water outlet end of the heat exchanger, and the other end is connected to an external water delivery pipe.

[0031] The air outlet of the fan 1 is connected to the heat exchanger; the fan 1 blows air to the heat exchanger through the air outlet, and after the heat exchanger performs heat exchange on the air, the air is blown to the outside from the exhaust port on the chassis 2; the drain pan 6 is used to receive the condensed water generated by the heat exchanger during the heat exchange process.

[0032] During the operation of the fan coil unit, the noise source mainly comes from the noise generated by the fan 1 during operation. For this reason, a shock-absorbing bracket 9 is arranged below the fan 1, and a plurality of shock-absorbing springs are installed on the shock-absorbing bracket 9. The shock-absorbing bracket 9 reduces vibration and noise from the vibration source. In some preferred embodiments, the shock-absorbing spring adopts an air spring. The shock-absorbing action area of ​​the air spring is the rubber airbag part in the middle, which has extremely low vibration conductivity, and the frequency transmitted from the upper end cover to the lower end cover can be greatly reduced.

[0033] The outer shell of the fan 1 is provided with a soundproof cover 8, which plays a role of sound insulation and reduces the conduction of noise. Specifically, the soundproof cover 8 adopts an aluminum honeycomb panel, which has good toughness and strong impact resistance, can absorb most of the energy through its own deformation, and has a good vibration reduction effect. The aluminum honeycomb panel in the utility model is made of an upper and lower elastic panel with a honeycomb aluminum core in the middle, which has a strong shock absorption performance. It also adopts a hexagonal structure to connect with each other to disperse the pressure from all sides, and isolate the noise in each layer and each section; the flatness of the panel is closely fitted with the honeycomb, and the honeycomb core and the surface aluminum plate are in a state of being jointly stressed, so that it will not move and displace during use, ensuring that the noise can be isolated while reducing the impact force and pressure. The heat concentration caused by the soundproof cover 8 can be effectively avoided, because the fan 1 is bound to generate a lot of heat when it is running. The elastic panel of the aluminum honeycomb panel can be made of aluminum skin board, and the panel and honeycomb core of the aluminum honeycomb panel are made of aluminum material with high thermal conductivity value, thereby achieving an efficient heat dissipation effect. The aluminum skin board adopts fluorocarbon coated aluminum plate, which means that a PVDF fluorocarbon coating is formed on the surface of the aluminum plate, usually formed by a spraying process, and also formed by a roller coating process, which further improves the practical performance of the aluminum honeycomb panel.

[0034] Part of the noise of the fan coil unit comes from the exhaust port of the heat exchanger. In order to achieve the effect of noise reduction and silencing, the exhaust port on the chassis 2 is provided with a noise reduction component 5. The noise reduction component 5 adopts a micro-perforated plate. The micro-perforated plate includes a perforated panel and an air back cavity to form a resonant structure. The principle of the micro-perforated plate is to drill a certain number of holes on the plate, and leave a certain air layer behind the plate, so that the incident sound waves are resonantly absorbed, thereby achieving the effect of sound absorption. At the same time, since a large number of micropores are drilled on the micro-perforated plate, the air outlet of the exhaust port will not be blocked. In some effective embodiments, the outer wall of the micro-perforated plate is provided with a sound insulation coating, and the sound insulation coating of the sound insulation coating is a nano multi-layer structure material, which sandwiches the coating molecular material in the middle. The entire intermediate membrane is evenly distributed with microparticles with sound insulation effect, which reduces the transmitted sound wave energy, thereby playing the role of sound absorption and sound insulation.

[0035] In the heat exchanger, the inlet and outlet water pipes are mostly made of copper tubes 7 with good heat dissipation. In the present invention, the copper tube 7 is a U-shaped spiral tube, one end of which is connected to the water outlet assembly 3, and the other end is connected to the water supply assembly 4. The above arrangement can further reduce noise. Under the guidance of the spiral tube, the water flows along the tube body in a spiral oblique straight line, and will not have a strong impact on its inner wall, so the noise is relatively small.

[0036] Since the fan 1 is the main source of noise, the fan 1 of the utility model adopts a centrifugal fan with an eccentric air inlet, that is, the air inlet of the fan 1 is not on the same horizontal line as the central axis of the impeller. The eccentric design of the air inlet of the air duct has a certain influence on improving the airflow distribution in the air duct, and can effectively reduce the noise generated by the airflow.

[0037] The above only expresses the preferred implementation of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, several modifications, improvements and substitutions can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A fan coil unit with a silencing function, characterized in that: It includes a fan, a heat exchanger integrated in the chassis, and a drain pan located below the heat exchanger; a water outlet assembly and a water supply assembly are arranged on the outer wall of the chassis; one end of the water supply assembly is connected to an external water delivery pipe, and the other end is connected to a water inlet end of the heat exchanger; one end of the water outlet assembly is connected to a water outlet end of the heat exchanger, and the other end is connected to an external water delivery pipe; The air outlet of the fan is connected with the heat exchanger; a shock absorbing bracket is arranged below the fan, and a plurality of shock absorbing springs are installed on the shock absorbing bracket; a sound-absorbing cover is sleeved on the outer shell of the fan; a noise reduction component is arranged at the air outlet on the chassis, and the noise reduction component adopts a micro-perforated plate.

2. A fan coil unit with a silencing function according to claim 1, characterized in that: The shock absorbing spring is an air spring.

3. The fan coil unit with a silencing function according to claim 1, characterized in that: The sound-absorbing outer cover adopts an aluminum honeycomb panel; the aluminum honeycomb panel comprises two layers of elastic panels, an upper layer and a lower layer, with a honeycomb aluminum core in the middle.

4. The fan coil unit with a silencing function according to claim 3, characterized in that: The elastic panel of the aluminum honeycomb panel is an aluminum skin plate.

5. The fan coil unit with a silencing function according to claim 4, characterized in that: The aluminum sheet is a fluorocarbon coated aluminum sheet.

6. The fan coil unit with a silencing function according to claim 1, characterized in that: The outer wall of the micro-perforated plate is provided with a sound insulation coating, and the sound insulation coating of the sound insulation coating is a nano multi-layer structure material.

7. The fan coil unit with a silencing function according to claim 1, characterized in that: The copper tube of the heat exchanger is a U-shaped spiral tube, one end of which is connected to the water outlet component, and the other end of which is connected to the water supply component.

8. The fan coil unit with a silencing function according to claim 1, characterized in that: The fan is a centrifugal fan with an eccentric air inlet.

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