Fan coil device

Abstract

The utility model belongs to the technical field of air conditioning, and particularly discloses a fan coil device which comprises a fan coil shell, the lower portion of the fan coil shell is connected with a condensate water receiving disc, a fan, a heat exchange unit and a motor are installed in the fan coil shell, and the motor drives the fan to work. An air supply port is formed in the front end of the fan coil shell, and an air return port is formed in the rear side of the fan coil shell; the total height between the fan coil shell and the condensate water receiving disc is increased by 50-70 mm compared with the total height between a common standard fan coil shell and the condensate water receiving disc; the height of the heat exchange unit is increased by 50-70 mm compared with that of a common standard heat exchange unit; the height of the return air inlet is 50-70mm larger than that of a common standard return air inlet; the height of the air supply outlet is increased by 50-70 mm compared with the height of a common standard air supply outlet. The operation noise of the fan coil unit disclosed by the utility model is obviously lower than that of a standard fan coil with the same air volume and the same specification, the rotating speed of the fan can be reduced, the power consumption of the fan can be reduced, and the energy conservation of the coil fan is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a fan coil device. Background Art

[0002] Fan coil units are currently the most commonly used air conditioning terminal devices. While regulating the indoor temperature and humidity, they are often accompanied by obvious operating noise. In general workplaces, the noise problem is not very prominent, but in sleeping places such as bedrooms or hotel rooms, the noise problem is a significant disadvantage. Especially at night, if the fan coil units are turned off or run at a low speed to reduce noise, it is difficult to provide good thermal comfort. This contradiction always exists and has not been well resolved.

[0003] At present, the size parameters of common standard fan coil units on the market are: h1 is 135mm, h2 is 225mm, h3 is 135mm, and h4 is 170mm. The parameter difference between different manufacturers is about ±10mm.

[0004] According to the mandatory provisions of the current national standard "General Specification for Building Environment" GB55016, the noise limit value transmitted from equipment in a building to a room should not be greater than 33dB(A) for the A-weighted sound pressure level in sleeping places. However, in the current product market, most places such as offices, conferences, hospitals and bedrooms use the same series of fan coil units, and the noise level of the equipment itself has not changed. When used in sleeping places, in order to meet the requirement of no more than 33dB(A), measures such as adding silencers or silencer linings are generally adopted, but the noise reduction effect cannot be guaranteed and the secondary cost will increase.

[0005] Therefore, it is necessary to design a special low-noise fan coil unit for sleeping places. In addition, if the fan coil unit in the sleeping environment such as hospital wards needs to be equipped with a physical barrier type high-efficiency and sub-high-efficiency filter device, the residual pressure outside the fan coil unit needs to reach 30Pa~50Pa. The greater the pressure head, the higher the noise, and the more prominent the contradiction between thermal comfort and noise, the more special low-noise fan coil units are needed. Utility Model Content

[0006] The utility model provides a fan coil unit, which aims to achieve a balance between cooling and heating and low noise without additional noise reduction measures.

[0007] The utility model is implemented by the following technical scheme: a fan coil unit device, comprising a fan coil unit housing, the lower part of the fan coil unit housing is connected to a condensed water receiving pan, a fan, a heat exchange unit and a motor are installed in the fan coil unit housing, the motor drives the fan to work, and the heat exchange unit is provided with a water inlet interface and a water return interface;

[0008] The front end of the fan coil housing is provided with an air supply port, and the rear side of the fan coil housing is provided with an air return port; the fan is located at the air return port, and the heat exchange unit is close to the air supply port;

[0009] The total height between the fan coil housing and the condensate receiving pan is 50-70mm higher than the total height between the fan coil housing and the condensate receiving pan of an ordinary standard type; the height of the heat exchange unit is 50-70mm higher than that of an ordinary standard type of heat exchange unit; the height of the return air outlet is 50-70mm higher than that of an ordinary standard type of return air outlet; the height of the air supply outlet is 50-70mm higher than that of an ordinary standard type of air supply outlet.

[0010] Compared with the prior art, this solution has the following advantages and beneficial effects:

[0011] In this solution, the structural dimensions of the existing fan coil unit are optimized first, the height of the fan coil unit shell itself is increased, as well as the size of the return air port, air supply port and heat exchange unit, the cross-sectional area of ​​the air supply airflow is increased, and the air supply speed is reduced while ensuring the same air supply flow rate, thereby reducing airflow noise. At the same time, the heat exchange area of ​​the heat exchange unit in this solution is increased, which will also increase the cooling and heating capacity.

[0012] Furthermore, the total height between the fan coil housing and the condensate receiving pan is 60 mm greater than the total height between the fan coil housing and the condensate receiving pan of an ordinary standard type; the height of the heat exchange unit is 60 mm greater than that of an ordinary standard type of heat exchange unit; the height of the return air outlet is 60 mm greater than that of an ordinary standard type of return air outlet; and the height of the supply air outlet is 60 mm greater than that of an ordinary standard type of supply air outlet.

[0013] Beneficial effect: The dimensions of the fan coil housing, return air outlet, supply air outlet and heat exchange unit in this solution are increased by 60 mm, which is a more appropriate dimension. It can increase the dimensions of each component without causing the overall dimension to be too large and increasing the occupied volume.

[0014] Furthermore, the heat exchange unit is a straight plate heat exchange fin.

[0015] Beneficial effect: The heat exchange unit adopts straight plate heat exchange fins, and does not need to use uneven fins with enhanced heat exchange, which can meet the rated cooling and heating capacity of fan coil units with the same air volume specifications, saving fin costs, while having lower resistance during air supply and easier cleaning.

[0016] Furthermore, the motor is a brushless DC motor.

[0017] Beneficial effect: The fan is driven by a brushless DC motor, which reduces the motor's background noise and power consumption during operation.

[0018] Furthermore, a sound insulation layer is provided on the inner surface of the fan coil housing.

[0019] Beneficial effect: Such a setting is conducive to isolating the fan noise of the unit and reducing the cooling and heat loss caused by heat transfer from the shell.

[0020] Furthermore, the return air outlet is arranged at the rear bottom or rear end of the fan coil housing.

[0021] Beneficial effect: With this arrangement, the location of the return air outlet can be selected according to the installation conditions of the room in which the return air outlet is to be used.

[0022] Furthermore, there are at least two fans.

[0023] Beneficial effect: Such an arrangement can improve the air exchange efficiency and air exchange capacity.

[0024] Furthermore, the motor is a dual-axis motor, and the dual-axis motor is located between two adjacent fans to drive the two fans to operate.

[0025] Beneficial effect: Such an arrangement can reduce the number of motors, lower costs and reduce the volume of the entire device.

[0026] Furthermore, the fan is a cross-flow fan, and the impeller diameter of the cross-flow fan is 20-30 mm larger than the impeller diameter of an ordinary standard cross-flow fan.

[0027] Beneficial effects: The cross-flow fan is small in size, light in weight, low in noise and low in power consumption. In addition, the cross-flow fan in this solution increases the impeller diameter, which can reduce the fan speed under the same air volume, thereby reducing the fan noise and saving the fan operation energy consumption.

[0028] Furthermore, a fan volute is provided on the outside of the fan, and the fan is located inside the fan volute.

[0029] Beneficial effect: With such a configuration, the fan volute can protect and shield the fan to prevent impurities from entering the fan. In addition, the fan volute also guides the direction of airflow and can improve the energy efficiency of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0031] Figure 1 It is a cross-sectional schematic diagram of a bottom return air fan coil unit of the utility model;

[0032] Figure 2 It is a cross-sectional schematic diagram of the rear-return type fan coil unit of the utility model;

[0033] Figure 3 The utility model is a top view of a fan coil device.

[0034] Marks and corresponding parts names in the attached drawings:

[0035] Fan coil housing 1, air supply outlet 2, return air outlet 3, fan 4, fan volute 41, heat exchange unit 5, water inlet interface 51, return water interface 50, motor 6, return air outlet airflow 7, fan outlet airflow 8, air supply outlet airflow 9, condensate receiving tray 10. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0037] Example 1

[0038] like Figure 1-Figure 3 As shown, this embodiment 1 provides a fan coil device, including a fan coil housing 1, the lower part of the fan coil housing 1 is connected to a condensate receiving pan 10 for receiving condensate, a fan 4, a heat exchange unit 5 and a motor 6 are installed in the fan coil housing 1, the motor 6 drives the fan 4 to work, and the heat exchange unit 5 is provided with a water inlet interface 51 and a return water interface 50. In this embodiment, the fan 4 is a cross-flow fan, and a fan volute 41 is provided on the outside of the fan 4, and the fan 4 is located inside the fan volute 41. The fan volute 41 plays a protective and shielding role for the fan 4 to prevent external impurities from entering the fan 4, and the fan volute 4 also plays a role in guiding the direction of airflow.

[0039] The front end of the fan coil housing 1 is provided with an air supply port 2, and the rear side of the fan coil housing 1 is provided with a return air port 3, and the return air port 3 is arranged at the rear bottom or rear end of the fan coil housing 1, which can be determined according to the installation conditions of the use room, such as Figure 1 As shown, the return air port 3 is arranged at the rear bottom of the fan coil housing 1, so that the return air port 3 is arranged vertically downward to form a bottom return air type fan coil device; Figure 2 As shown, the return air inlet 3 is arranged at the rear end (ie, the rear end) of the fan coil housing 1, so that the return air inlet 3 is arranged horizontally to form a rear return air type fan coil device.

[0040] The fan 4 is located at the return air outlet 3, and the heat exchange unit 5 is close to the air supply outlet 2; Figure 1 As shown, the airflow at the return air outlet 3 is the return air outlet airflow 7 , the airflow at the outlet of the fan 4 is the fan outlet airflow 8 , and the airflow at the supply air outlet 2 is the supply air outlet airflow 9 .

[0041] In this embodiment, the total height between the fan coil housing 1 and the condensate receiving pan 10 is 50-70 mm greater than the total height between the fan coil housing 1 and the condensate receiving pan 10 of an ordinary standard type; the height of the heat exchange unit 5 is 50-70 mm greater than the height of the ordinary standard type heat exchange unit 5; the height of the return air outlet 3 is 50-70 mm greater than the height of the ordinary standard type return air outlet 3; the height of the air supply outlet 2 is 50-70 mm greater than the height of the ordinary standard type air supply outlet 2.

[0042] In this embodiment, the total height between the fan coil housing 1 and the condensate receiving pan 10 is 60 mm greater than the total height between the fan coil housing 1 and the condensate receiving pan 10 of an ordinary standard type; the height of the heat exchange unit 5 is 60 mm greater than the height of the ordinary standard type heat exchange unit 5; the height of the return air outlet 3 is 60 mm greater than the height of the ordinary standard type return air outlet 3; the height of the air supply outlet 2 is 60 mm greater than the height of the ordinary standard type air supply outlet 2.

[0043] like Figure 1 , Figure 2 As shown, h1 is the height of the heat exchange unit 5, h2 is the total height of the fan coil housing 1 and the condensate receiving tray 10, h3 is the height of the air supply port 2, and h4 is the height of the return air port 3. In the current product market, the size parameters of ordinary standard fan coil units are: h1 is 135mm, h2 is 225mm, h3 is 135mm, and h4 is 170mm. The parameter difference between different manufacturers is about ±10mm.

[0044] Therefore, the total height h2 of the fan coil housing 1 and the condensate receiving tray 10 of the utility model is increased from the conventional 225 mm to 285 mm, which increases the flow area of ​​the supply air flow in the fan coil housing 1, reduces the wind speed at the same air volume, and reduces the air flow regeneration noise.

[0045] The increase in the total height h2 of the fan coil housing 1 and the condensate receiving tray 10 provides more installation space for the heat exchange unit 5. The height h1 of the heat exchange unit 5 is increased from the conventional 135 mm to 195 mm, and the heat exchange area is increased by about 40%, thereby achieving a higher heat exchange capacity. At the same time, the wind speed of the heat exchange unit 5 is reduced, which is conducive to a lower noise level.

[0046] In this embodiment, the heat exchange unit 5 is a straight plate heat exchange fin. In this embodiment, due to the increase in the heat exchange area of ​​the heat exchange unit 5, straight plate heat exchange fins can be used instead of uneven fins with enhanced heat exchange. The rated cooling and heating capacity of the fan coil unit with the same air volume specification can be met, saving fin costs, while having lower resistance and being easier to clean.

[0047] like Figure 1 , Figure 2As shown, the height h4 of the return air vent 3 increases from 170mm to 230mm, and the height h3 of the supply air vent 2 increases from 135mm to 195mm. As the dimensions of the fan coil housing 1, the return air vent 3, the supply air vent 2, and the heat exchange unit 5 are all enlarged, the wind speed of the return air flow from the fan outlet air flow 8 to the supply air vent air flow 9 is effectively reduced under the premise of the same air volume and heat exchange capacity. The minimum wind speed of the supply air vent air flow 9 can meet the reasonable range requirements of the air flow by adjusting the angle of the supply air vent air flow 9 to achieve a balance between thermal comfort and acoustic comfort in the room.

[0048] The low-noise fan coil technology of the utility model, through the above-mentioned improvements, not only significantly reduces the operating noise of the fan coil, improves the comfort of the sleeping place, and achieves a balance between the thermal environment and the acoustic environment, but also achieves energy-saving effects on the coil fan and reduces operating costs. In addition, the design of the new fan coil is also easy to clean and maintain, which improves the user experience. A fan coil device of the utility model is a low-noise energy-saving fan suitable for sleeping places, which can achieve a balance between cooling and heating and low noise without additional silencing measures.

[0049] Example 2

[0050] The difference between this embodiment and embodiment 1 is that Figure 3 As shown, in this embodiment, the motor 6 adopts a brushless DC motor, which can effectively reduce the noise of the motor 6 when the equipment is running; at the same time, due to the optimization of the fan coil structure size, on the basis of ensuring the same cooling and heating capacity, the air flow velocity and resistance of the entire flow channel from the return air port 3 to the air supply port 2 are greatly reduced, and the impeller diameter of the cross-flow fan can be appropriately increased. The impeller diameter of the cross-flow fan in this embodiment is 20-30mm larger than the impeller diameter of the ordinary standard cross-flow fan; the fan runs at a low speed to reduce the fan noise and save the fan energy consumption.

[0051] At least two fans 4 are provided. In this embodiment, two fans 4 are provided. The motor 6 is a dual-axis motor, that is, a dual-axis DC brushless motor. The dual-axis motor is located between two adjacent fans 4 to drive the two fans 4 to operate.

[0052] Example 3

[0053] The difference between this embodiment and embodiment 1 is that in this embodiment, in addition to optimizing the structural dimensions of the fan coil unit itself, the utility model also adopts other measures to reduce the operating noise of the equipment itself. In this embodiment, a sound insulation layer (not shown in the figure) with a heat preservation function is pasted on the inner surface of the fan coil unit housing 1. In this embodiment, the sound insulation layer is a rubber-plastic material layer that integrates sound insulation and heat preservation, and its fire resistance level is B1 flame retardant level, so that the sound insulation layer not only has the function of sound insulation, but also has the function of heat preservation and flame retardancy. The thickness of the sound insulation layer in this embodiment is comprehensively determined according to the heat preservation and sound insulation capabilities. In addition, the sound insulation layer in this embodiment is made of rubber-plastic material. In order to meet the heat preservation performance, the rubber-plastic material is generally closed-cell. Therefore, in terms of acoustic performance, the sound insulation performance of the closed-cell rubber-plastic material is better than the sound absorption performance, which is beneficial to isolate the noise of the unit fan and reduce the cold and heat loss caused by heat transfer of the shell.

[0054] The sizes of the air supply port 2 and the return air port 3 of the utility model are increased by about 40% compared with the standard fan coil unit, so as to increase the air flow area, reduce the wind speed and noise; the inner cavity of the fan coil housing 1 is pasted with a flame-retardant rubber-plastic insulation material with sound absorption performance; the cross-flow fan is driven by a DC brushless motor, and the impeller of the fan can adopt a large-diameter impeller, which can lead the airflow from the return air port to the air supply port and send it into the room at a lower speed when the air volume is the same; the heat exchange unit adopts straight plate heat exchange fins, which have small airflow resistance and are easy to clean.

[0055] Since the overall height of the fan coil housing 1 is increased, the airflow section is increased by about 40% compared with the standard fan coil, the heat exchange area of ​​the heat exchange unit can be increased by about 40%, and the heat exchange capacity is increased in the same proportion. Based on the above measures, the operating noise of the fan coil device disclosed by the utility model is significantly lower than that of the standard fan coil with the same air volume and specification. At the same time, since the resistance of the whole process of the fan coil airflow is significantly reduced, the fan speed can be reduced, the fan power consumption can be reduced, and the coil fan energy saving can be achieved.

[0056] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0057] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0058] In the description of this document, terms such as "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0059] In the description of this document, some terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0060] In the description of this document, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing book for technical personnel in this field to understand and read, and are not used to limit the restrictive conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0062] The terms used in this document are those common terms currently widely used in the art in consideration of the functions of the present disclosure, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as an overall description based on the meaning of the terms and the present disclosure.

[0063] Flowcharts or text are used in this document to illustrate the operating steps performed according to the embodiments of the present application. It should be understood that the operating steps in the embodiments of the present application are not necessarily accurately performed in the order of recording. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or a certain step or several steps can be removed from these processes.

[0064] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fan coil unit device, comprising a fan coil unit housing, wherein a condensate receiving pan is connected to the lower portion of the fan coil unit housing, wherein: A fan, a heat exchange unit and a motor are installed in the fan coil housing, the motor drives the fan to work, and the heat exchange unit is provided with a water inlet interface and a water return interface; The front end of the fan coil housing is provided with an air supply port, and the rear side of the fan coil housing is provided with an air return port; the fan is located at the air return port, and the heat exchange unit is close to the air supply port; The total height between the fan coil housing and the condensate receiving pan is 50-70mm higher than the total height between the fan coil housing and the condensate receiving pan of an ordinary standard type; the height of the heat exchange unit is 50-70mm higher than that of an ordinary standard type of heat exchange unit; the height of the return air outlet is 50-70mm higher than that of an ordinary standard type of return air outlet; the height of the air supply outlet is 50-70mm higher than that of an ordinary standard type of air supply outlet.

2. A fan coil unit according to claim 1, characterized in that: The total height between the fan coil housing and the condensate receiving pan is 60mm greater than the total height between the fan coil housing and the condensate receiving pan of an ordinary standard type; the height of the heat exchange unit is 60mm greater than that of an ordinary standard type of heat exchange unit; the height of the return air outlet is 60mm greater than that of an ordinary standard type of return air outlet; the height of the air supply outlet is 60mm greater than that of an ordinary standard type of air supply outlet.

3. A fan coil unit according to claim 1, characterized in that: The heat exchange unit is a straight plate type heat exchange fin.

4. A fan coil unit according to claim 1, characterized in that: The motor is a brushless DC motor.

5. A fan coil unit according to claim 1, characterized in that: A sound insulation layer is arranged on the inner surface of the fan coil housing.

6. A fan coil unit according to any one of claims 1 to 5, characterized in that: The return air port is arranged at the rear bottom or rear end of the fan coil housing.

7. A fan coil unit according to claim 1, characterized in that: The fans are provided with at least two.

8. A fan coil unit according to claim 7, characterized in that: The motor is a double-shaft motor, and the double-shaft motor is located between two adjacent fans to drive the two fans to operate.

9. A fan coil unit according to claim 1, characterized in that: The fan is a cross-flow fan, and the impeller diameter of the cross-flow fan is 20-30 mm larger than the impeller diameter of an ordinary standard cross-flow fan.

10. A fan coil unit according to claim 1, characterized in that: A fan volute is arranged outside the fan, and the fan is located inside the fan volute.

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