Fan-coil unit, control method thereof, and air conditioning unit

Abstract

The application discloses a fan-coil unit, a control method thereof and an air conditioning unit, wherein the fan-coil unit comprises: an air treatment device arranged in a return air box of the fan-coil unit, the air treatment device comprising: a plurality of air treatment modules, the plurality of air treatment modules at least comprising a heat exchange module and a filter module; and a module moving device arranged in the return air box and connected with the air treatment module, used for adjusting the position of the air treatment module so as to adopt the heat exchange module and / or the filter module to perform heat exchange and / or filtration on air entering the return air box. The application solves the problems of slow heat exchange and poor air quality of the air out of the fan-coil unit in the prior art, realizes rapid refrigeration, and greatly improves indoor air quality.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a fan coil unit and its control method, and an air conditioning unit. Background Technology

[0002] Fan coil units are ideal terminal products for air conditioning systems and are widely used in hotels, office buildings, hospitals, commercial and residential buildings, and research institutions. They cool or heat indoor air or a mixture of indoor and outdoor air through a cooling coil before delivering it into the room, thus lowering or raising the indoor temperature to meet people's comfort requirements.

[0003] Fan coil units generate a large amount of condensate during operation, which is often directly drained, resulting in waste. In hot summers, fan coil units often need to run for a period of time to reach the preset temperature, reducing user comfort. Furthermore, during periods of severe air pollution such as smog, air quality deteriorates significantly, posing a threat to human health.

[0004] There is currently no effective solution to the problems of slow heat exchange and poor air quality in fan coil units in related technologies. Summary of the Invention

[0005] This invention provides a fan coil unit and its control method, as well as an air conditioning unit, to at least solve the problems of slow heat exchange and poor air quality in the prior art.

[0006] To address the aforementioned technical problems, according to one aspect of the present invention, a fan coil unit is provided, comprising:

[0007] An air handling unit is installed inside the return air box of a fan coil unit. The air handling unit includes multiple air handling modules, each of which includes at least a heat exchange module and a filter module.

[0008] A module moving device, located inside the return air box and connected to the air handling module, is used to adjust the position of the air handling module so as to perform heat exchange and / or filtration on the air entering the return air box using heat exchange modules and / or filtration modules.

[0009] Furthermore, the module moving device includes: a circular track, the central axis of which is perpendicular to the air inlet direction of the return air box, and the air handling module is arc-shaped and disposed within the circular track.

[0010] Furthermore, the module moving device also includes:

[0011] Track support, with a circular track mounted on the track support;

[0012] A drive component, connected to the air handling module, is used to drive the air handling module to rotate within a circular track to adjust its position. The circular track includes at least three areas: an air inlet area, an air outlet area, and a sheltered area. The air inlet area is located on the air inlet side of the return air box, the air outlet area is located on the air outlet side of the return air box, and the sheltered area is the area of ​​the circular track excluding the air inlet and air outlet areas. When the heat exchange module is located in the air inlet or air outlet area, the air handling unit exchanges heat with the air entering the return air box; when the filter module is located in the air inlet or air outlet area, the air handling unit filters the air entering the return air box.

[0013] Furthermore, it also includes:

[0014] The outlet air box is connected to the return air box;

[0015] The heat exchanger is located inside the air outlet box;

[0016] The condensate circulation system is used to pass the condensate generated by the heat exchanger into the heat exchange module to exchange heat with the air entering the return air box.

[0017] Furthermore, the condensate circulation system includes:

[0018] A condensate drip tray is located below the heat exchanger;

[0019] The condensate drain pipe connects to the condensate drain pan and is used to transport condensate.

[0020] A connecting water pipe is used to connect condensate water pipe at one end and heat exchange module at the other end, so as to introduce condensate water into heat exchange module; the connecting water pipe is a retractable water pipe.

[0021] Furthermore, the condensate pipe is equipped with a first branch and a second branch, the first branch being closer to the condensate drip tray side and the second branch being closer to the connecting water pipe side; the condensate circulation system also includes:

[0022] The condensate storage tank has its inlet connected to the first branch and its outlet connected to the second branch.

[0023] Furthermore, the condensate circulation system also includes:

[0024] The first water pump is located on the condensate pipe between the second branch and the connecting water pipe;

[0025] The first control valve is located on the condensate pipe between the first branch and the second branch;

[0026] The second water pump is located on the second branch road;

[0027] The second control valve is located on the first branch;

[0028] The third control valve is located at the drain outlet of the condensate storage tank;

[0029] The fourth control valve is located on the second branch.

[0030] The water level detector is located inside the condensate storage tank.

[0031] Furthermore, it also includes:

[0032] Ambient temperature sensor is used to detect the ambient temperature where the fan coil unit is located;

[0033] An air quality detector, located at the air inlet of the return air box, is used to detect the air quality index.

[0034] According to another aspect of the present invention, a fan coil unit control method is provided, applied to the fan coil unit as described above, the method comprising:

[0035] Detect the ambient temperature and air quality index of the fan coil unit;

[0036] The operating mode of the air handling unit is determined based on the ambient temperature and air quality index; the operating modes include at least: rapid cooling mode, rapid cooling and filtration mode, filtration mode, and normal cooling mode.

[0037] The operation of the control module moving device and the condensate circulation system is controlled according to the operating mode.

[0038] Furthermore, the operating mode of the air handling unit is determined based on ambient temperature and air quality index, including:

[0039] Calculate the temperature difference between the ambient temperature and the preset temperature, and determine whether the temperature difference is greater than the preset difference;

[0040] Determine if the air quality index is greater than the preset index;

[0041] When the temperature difference is greater than or equal to the preset difference and the air quality index is greater than the preset index, the operating mode is determined to be the rapid cooling mode;

[0042] When the temperature difference is greater than or equal to the preset difference and the air quality index is not greater than the preset index, the operating mode is determined to be the rapid cooling and filtration mode.

[0043] When the temperature difference is less than the preset difference and the air quality index is greater than the preset index, the operating mode is determined to be normal cooling mode.

[0044] When the temperature difference is less than the preset difference and the air quality index is not greater than the preset index, the operating mode is set to filtration mode.

[0045] Furthermore, the operation of the control module moving device and the condensate circulation system is controlled according to the operating mode, including:

[0046] When the operating mode is rapid cooling mode, the heat exchange module is controlled to be located in the air inlet or air outlet area, and the condensate circulation system is controlled to start.

[0047] When the operating mode is rapid cooling and filtration mode, the heat exchange module is controlled to be located in the air inlet area and the filtration module is located in the air outlet area, or the heat exchange module is located in the air outlet area and the filtration module is located in the air inlet area, and the condensate circulation system is controlled to be turned on.

[0048] When the operating mode is normal cooling mode, the control heat exchange module and filter module are located in the sheltered area;

[0049] When the operating mode is filtration mode, the heat exchange module is located in the sheltered area, and the filtration module is located in the air inlet or air outlet area.

[0050] Furthermore, controlling the start of the condensate circulation system includes:

[0051] Check if there is water in the condensate storage tank;

[0052] If so, the water in the condensate storage tank will be used for heat exchange in the heat exchange module;

[0053] Otherwise, the water in the condensate collection pan is used for heat exchange in the heat exchange module.

[0054] Furthermore, the water in the condensate storage tank is used for heat exchange in the heat exchange module, including: controlling the first control valve to close, the second control valve and the fourth control valve to open, and the second water pump to start;

[0055] The heat exchange module uses water from the condensate collection pan for heat exchange, including: opening the first control valve, closing the second and fourth control valves, and starting the first water pump.

[0056] Furthermore, it also includes:

[0057] After the fan coil unit is shut down, the ambient temperature is checked at preset intervals.

[0058] When the ambient temperature is less than or equal to the freezing point, the system detects whether there is water in the condensate storage chamber. If there is water in the condensate storage chamber, the system controls the third control valve to open and drain the water from the condensate storage chamber.

[0059] According to another aspect of the present invention, an air conditioning unit is provided, including the fan coil unit as described above.

[0060] According to another aspect of the present invention, a storage medium containing computer-executable instructions is provided, which, when executed by a computer processor, are used to perform the fan coil control method as described above.

[0061] This invention provides a fan coil unit that addresses the problems of existing technologies that cannot quickly reach a preset temperature and lack air filtration functionality. The fan coil unit of this invention incorporates an air handling unit within the return air box. This air handling unit includes a heat exchange module and a filter module, which perform heat exchange and filtration on the air entering the return air box. Furthermore, a module movement device is provided to adjust the position of the air handling module. By adjusting the module used according to specific environmental conditions, heat exchange and / or filtration functions can be achieved, thereby not only realizing rapid cooling but also significantly improving indoor air quality and achieving an air purification effect. Attached Figure Description

[0062] Figure 1 This is a schematic diagram of an optional structure of a fan coil unit according to an embodiment of the present invention;

[0063] Figure 2 This is a schematic diagram of the area arrangement of the circular track and the position of the air handling module under different operating modes according to an embodiment of the present invention;

[0064] Figure 3 This is an optional flowchart of a fan coil unit control method according to an embodiment of the present invention;

[0065] Figure 4 This is another optional flowchart of the fan coil control method according to an embodiment of the present invention.

[0066] Explanation of reference numerals in the attached figures:

[0067] 1. Return air box; 2. Heat exchange module; 3. Filter module; 4. Circular track; 5. Track support; 6. Drive component; 61. Driver; 62. Connecting rod; 7. Outlet air box; 8. Heat exchanger; 9. Condensate drip tray; 10. Condensate pipe; 11. Connecting water pipe; 12. Condensate storage chamber; 13. First water pump; 14. First control valve; 15. Second water pump; 16. Second control valve; 17. Third control valve; 18. Fourth control valve; 19. Water level detector; 20. Ambient temperature sensor; 21. Air quality detector. Detailed Implementation

[0068] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0069] Example 1

[0070] In a preferred embodiment 1 of the present invention, a fan coil unit is provided, specifically... Figure 1 This diagram illustrates one possible structural design of the fan coil unit, such as... Figure 1 As shown, the fan coil unit includes:

[0071] An air handling unit is installed inside the return air box 1 of the fan coil unit. The air handling unit includes multiple air handling modules, and the multiple air handling modules include at least a heat exchange module 2 and a filter module 3.

[0072] A module moving device, located inside the return air box 1 and connected to the air handling module, is used to adjust the position of the air handling module so that the heat exchange module 2 and / or filter module 3 can be used to perform heat exchange and / or filtration on the air entering the return air box 1.

[0073] In the above embodiments, a fan coil unit is provided. Addressing the problems of existing technologies that cannot quickly reach a preset temperature and lack air filtration functionality, the fan coil unit of this invention incorporates an air handling unit within the return air box. This air handling unit includes a heat exchange module and a filtration module, which perform heat exchange and filtration on the air entering the return air box. Furthermore, a module movement device is provided to adjust the position of the air handling module. By adjusting the module used according to specific environmental conditions, heat exchange and / or filtration functions can be achieved, thereby not only realizing rapid cooling but also significantly improving indoor air quality and achieving an air purification effect.

[0074] like Figure 1 As shown, the module moving device includes: a circular track 4, the central axis of which is perpendicular to the air inlet direction of the return air box 1, and the air handling module is arc-shaped and set inside the circular track 4. Figure 1 The image shows a side view of a fan coil unit. In this figure, the annular track 4 is horizontal. However, the annular track 4 can also be vertical. The top view of the vertical annular track 4 is similar to... Figure 1 Side view of the middle circular track 4 Figure 1 Both configurations of the circular track 4 can achieve the effect of the return air box 1 receiving air through the air handling module.

[0075] In a preferred embodiment of the present invention, the module moving device further includes: a track support 5, with an annular track 4 disposed on the track support 5; and a driving component 6, connected to the air treatment module, for driving the air treatment module to rotate within the annular track 4 to adjust the position of the air treatment module; as shown below. Figure 1 As shown, the drive device includes a driver 61 and a connecting rod 62. Each connecting rod is connected to an air treatment module and drives the corresponding air treatment module to move on the circular track 4.

[0076] Figure 2 This diagram illustrates the zoning of the circular track and the location of the air handling modules under different operating modes. (See attached diagram.) Figure 2 As shown, the annular track 4 includes at least three areas: air inlet area—area A, air outlet area—area C, and sheltered area—areas B and D; wherein, the air inlet area is located on the air inlet side of the return air box 1, the air outlet area is located on the air outlet side of the return air box 1, and the sheltered area is the area of ​​the annular track 4 other than the air inlet area and the air outlet area; when the heat exchange module 2 is located in the air inlet area or the air outlet area, the air handling unit performs heat exchange on the air entering the return air box 1, and when the filter module 3 is located in the air inlet area or the air outlet area, the air handling unit filters the air entering the return air box 1.

[0077] In addition to the return air box 1, the fan coil unit also includes: an outlet air box 7, which is connected to the return air box 1; such as Figure 1 As shown, a fan and a heat exchanger 8 are installed inside the return air box 1.

[0078] In this invention, in order to utilize condensate, avoid condensate waste, and achieve energy saving, a condensate circulation system is also provided to pass the condensate generated by the heat exchanger 8 into the heat exchange module 2 to exchange heat with the air entering the return air box 1.

[0079] The condensate circulation system includes: a condensate collection tray 9, located below the heat exchanger 8; a condensate pipe 10, connected to the condensate collection tray 9, for transporting condensate; and a connecting pipe 11, one end connected to the condensate pipe 10 and the other end connected to the heat exchange module 2, for guiding condensate into the heat exchange module 2; wherein the connecting pipe 11 is a retractable pipe. This device allows the condensate generated by the heat exchanger 8 to be directly transported to the heat exchange module 2 via the condensate pipe 10.

[0080] Preferably, the condensate pipe 10 is provided with a first branch and a second branch, the first branch being closer to the condensate collection pan 9 and the second branch being closer to the connecting water pipe 11; the condensate circulation system further includes: a condensate storage tank 12, the inlet of which is connected to the first branch and the outlet of which is connected to the second branch. The condensate circulation system further includes: a first water pump 13 located on the condensate pipe 10 between the second branch and the connecting water pipe 11; a first control valve 14 located on the condensate pipe 10 between the first and second branches; a second water pump 15 located on the second branch; a second control valve 16 located on the first branch; a third control valve 17 located at the drain outlet of the condensate storage tank 12; a fourth control valve 18 located on the second branch; and a water level detector 19 located inside the condensate storage tank 12. The above-mentioned device can transport the condensate generated by the heat exchanger 8 directly to the heat exchange module 2 through the condensate pipe 10, or transport the condensate in the condensate storage tank to the heat exchange module 2 through the condensate pipe 10.

[0081] In addition, the fan coil unit of the present invention also includes: an ambient temperature sensor 20 for detecting the ambient temperature where the fan coil unit is located; and an air quality detector 21 located at the air inlet of the return air box 1 for detecting the air quality index.

[0082] Example 2

[0083] In a preferred embodiment 2 of the present invention, a fan coil unit control method is provided, which is applied to the fan coil unit in embodiment 1 above. Specifically, Figure 3 An optional flowchart of the method is shown, such as Figure 3 As shown, the method includes the following steps S302-S306:

[0084] S302: Detect the ambient temperature and air quality index of the fan coil unit;

[0085] S304: Determine the operating mode of the air handling unit based on the ambient temperature and air quality index; wherein the operating modes include at least: rapid cooling mode, rapid cooling and filtration mode, filtration mode, and normal cooling mode;

[0086] S306: Control the operation of the moving device of the control module and the condensate circulation system according to the operating mode.

[0087] In the above embodiments, a fan coil unit is provided. Addressing the problems of existing technologies that cannot quickly reach a preset temperature and lack air filtration functionality, the fan coil unit of this invention incorporates an air handling unit within the return air box. This air handling unit includes a heat exchange module and a filtration module, which perform heat exchange and filtration on the air entering the return air box. Furthermore, a module movement device is provided to adjust the position of the air handling module. By adjusting the module used according to specific environmental conditions, heat exchange and / or filtration functions can be achieved, thereby not only realizing rapid cooling but also significantly improving indoor air quality and achieving an air purification effect.

[0088] The operating mode of the air handling unit is determined based on the ambient temperature and the air quality index, including: calculating the temperature difference between the ambient temperature and the preset temperature, and determining whether the temperature difference is greater than the preset difference; determining whether the air quality index is greater than the preset index; when the temperature difference is greater than or equal to the preset difference and the air quality index is greater than the preset index, the operating mode is determined to be rapid cooling mode; when the temperature difference is greater than or equal to the preset difference and the air quality index is not greater than the preset index, the operating mode is determined to be rapid cooling and filtration mode; when the temperature difference is less than the preset difference and the air quality index is greater than the preset index, the operating mode is determined to be normal cooling mode; and when the temperature difference is less than the preset difference and the air quality index is not greater than the preset index, the operating mode is determined to be filtration mode.

[0089] Specifically, when the operating mode is rapid cooling mode, the heat exchange module is located in the air inlet or outlet area, and the condensate circulation system is turned on. In this mode, the return air passes directly through the heat exchange module with condensate and its temperature is reduced. Then, it is transmitted by the fan through the heat exchanger and cooled again before being output to the room, achieving a rapid cooling effect.

[0090] When the operating mode is rapid cooling and filtration mode, the heat exchange module is located in the air inlet area and the filter module is located in the air outlet area, or the heat exchange module is located in the air outlet area and the filter module is located in the air inlet area, and the condensate circulation system is turned on. In this mode, not only is the cooling rapid, but the return air passes through the filter screen, which greatly improves the air quality and achieves the purification effect.

[0091] When the operating mode is normal cooling mode, the control heat exchange module and filter module are located in the windproof area; in this mode, the wind resistance is minimized, improving the heat exchange efficiency.

[0092] When the operating mode is filtration mode, the heat exchange module is located in the sheltered area, and the filter module is located in the air inlet or outlet area. This mode only filters the air, improving air quality.

[0093] Furthermore, controlling the condensate circulation system involves: detecting whether there is water in the condensate storage tank; if so, using the water in the condensate storage tank for heat exchange in the heat exchange module; otherwise, using the water in the condensate drip tray for heat exchange in the heat exchange module. A water level detector is activated to detect the presence of condensate in the condensate storage tank. When condensate is present, the first control valve closes, the third control valve is normally closed, the second and fourth control valves open, and the second water pump starts to transport the condensate from the condensate storage tank to the heat exchange module via the condensate pipe. When there is no condensate stored, the first control valve opens, the second and fourth control valves close, and the first water pump starts. In this case, the condensate generated by the heat exchanger is directly transported to the heat exchange module via the condensate pipe.

[0094] In another optional embodiment of the present invention, in the case of normal refrigeration mode and filter module, the first control valve is closed, the third control valve is normally closed, the second control valve is open, the fourth control valve is closed, and the water pumps are all turned off. At this time, the condensate generated by the heat exchanger is transported through water pipes to the condensate storage tank for storage, so that it can be used next time.

[0095] To prevent the condensate in the condensate storage tank from freezing due to excessively low temperatures during the fan coil unit's shutdown period, the present invention further includes: after the fan coil unit stops, detecting the ambient temperature at preset intervals; when the ambient temperature is less than or equal to the freezing point, detecting whether there is water in the condensate storage tank; and when there is water in the condensate storage tank, controlling the third control valve to open and drain the water from the condensate storage tank.

[0096] The aforementioned fan coil unit and its control method utilize condensate water and adjust the working mode of the air handling unit according to the temperature difference between the ambient temperature and the preset temperature, thereby achieving rapid cooling. Furthermore, the working mode of the air handling unit can be adjusted according to changes in air quality to filter air impurities and improve air quality.

[0097] In a preferred embodiment 2 of the present invention, another fan coil unit control method is also provided, specifically... Figure 4 An optional flowchart of the method is shown, such as Figure 4 As shown, the method includes the following steps S401-S423:

[0098] S401: Start;

[0099] S402: Ambient temperature detection;

[0100] S403: Control Center;

[0101] S404: If the difference between the measured temperature and the preset temperature is ≥10℃, proceed to step S405.

[0102] S405: Water level detector activated;

[0103] S406: The first control valve is closed, the third control valve is normally closed, the second and fourth control valves are open, and the second water pump starts; when the difference between the measured temperature and the preset temperature is ≥10℃, the water level detector starts to detect whether there is condensate in the condensate storage tank. When there is condensate, the first control valve is closed, the third control valve is normally closed, the second and fourth control valves are open, and the second water pump starts to transport the condensate in the condensate storage tank to the heat exchange module through the condensate pipe;

[0104] S407: The first control valve is open, the second and fourth control valves are closed, and the first water pump is started; when there is no condensate stored, the first control valve is open, the second and fourth control valves are closed, and the first water pump is started. At this time, the condensate generated by the heat exchanger is directly transported to the heat exchange module through the condensate pipe.

[0105] S408: Air quality detector, detects air quality; furthermore, the air quality detector is activated;

[0106] S409: The heat exchange module and filter module drive components are activated. Rotate the heat exchange module to zone C and the filter module to zone B to enter rapid cooling mode. When the air quality index is 60% higher than the standard, the heat exchanger and filter screen drive components are activated. Rotate the heat exchanger to zone C and the filter screen to zone B to enter rapid cooling mode. In this mode, the return air passes directly through the heat exchanger with condensate to reduce its temperature, and then is transported by the fan through the heat exchanger for further cooling before being output to the room, achieving a rapid cooling effect.

[0107] S410: The heat exchange module and filter module drive components are activated. Rotate the heat exchange module to zone C and the filter module to zone A to enter the rapid cooling and filtration mode. When the air quality index is below 60% of the standard, the heat exchanger and filter drive components are activated. Rotate the heat exchanger to zone C and the filter to zone A to enter the rapid cooling and filtration mode. In this mode, not only is rapid cooling achieved, but the return air also passes through the filter, greatly improving air quality and achieving a purification effect.

[0108] S411: The difference between the measured temperature and the preset temperature is <10℃;

[0109] S412: Air quality detector, used to detect air quality;

[0110] S413: The heat exchange module and filter module drive components are activated. Rotate the heat exchange module to zone D and the filter module to zone B to enter normal cooling mode. When the difference between the measured temperature and the preset temperature is less than 10℃, the air quality detector is activated. When the air quality index is 60% higher than the standard, the heat exchanger and filter screen drive components are activated. Rotate the heat exchanger to zone D and the filter screen to zone B to enter normal mode. In this mode, air resistance is minimized, improving heat exchange efficiency.

[0111] S414: The heat exchange module and filter module drive components are activated. Rotate the heat exchange module to zone D and the filter module to zone A to enter filtration mode. When the air quality index is 60% below the standard, the heat exchanger and filter screen drive components are activated. Rotate the heat exchanger to zone D and the filter screen to zone A to enter filtration mode. This mode is solely for filtering air and improving air quality.

[0112] S415: First control valve closed, third control valve normally closed, second control valve open, fourth control valve closed, water pump off;

[0113] S416: Fan coil unit starts running;

[0114] S417: Stop operation;

[0115] S418: Ambient temperature detection; After the fan coil unit stops, the ambient temperature is detected at preset intervals;

[0116] S419: First control valve opens;

[0117] S420: Water level detection; Uses a water level detector to check if there is water in the condensate storage tank;

[0118] S421: The first control valve is closed; when the ambient temperature is less than or equal to the freezing point, the system detects whether there is water in the condensate storage chamber, and when there is water in the condensate storage chamber, it controls the third control valve to open and drain the water from the condensate storage chamber.

[0119] S422: First control valve closed; when the ambient temperature is above the freezing point, it is not necessary to drain the water in the condensate storage tank.

[0120] S423: Off.

[0121] Example 3

[0122] Based on the fan coil unit provided in Embodiment 1 above, an air conditioning unit is also provided in a preferred embodiment 3 of the present invention, including the fan coil unit as described above.

[0123] In the above embodiments, a fan coil unit is provided. Addressing the problems of existing technologies that cannot quickly reach a preset temperature and lack air filtration functionality, the fan coil unit of this invention incorporates an air handling unit within the return air box. This air handling unit includes a heat exchange module and a filtration module, which perform heat exchange and filtration on the air entering the return air box. Furthermore, a module movement device is provided to adjust the position of the air handling module. By adjusting the module used according to specific environmental conditions, heat exchange and / or filtration functions can be achieved, thereby not only realizing rapid cooling but also significantly improving indoor air quality and achieving an air purification effect.

[0124] Example 4

[0125] Based on the fan coil control method provided in Embodiment 1 above, in a preferred embodiment 4 of the present invention, a storage medium containing computer-executable instructions is also provided. When executed by a computer processor, the computer-executable instructions are used to execute the fan coil control method as described above.

[0126] In the above embodiments, a fan coil unit is provided. Addressing the problems of existing technologies that cannot quickly reach a preset temperature and lack air filtration functionality, the fan coil unit of this invention incorporates an air handling unit within the return air box. This air handling unit includes a heat exchange module and a filtration module, which perform heat exchange and filtration on the air entering the return air box. Furthermore, a module movement device is provided to adjust the position of the air handling module. By adjusting the module used according to specific environmental conditions, heat exchange and / or filtration functions can be achieved, thereby not only realizing rapid cooling but also significantly improving indoor air quality and achieving an air purification effect.

[0127] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented by the invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0128] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A fan coil unit, characterized in that, include: An air handling unit is installed in the return air box (1) of the fan coil unit. The air handling unit includes multiple air handling modules, which include a heat exchange module (2) and a filter module (3). A module moving device is installed inside the return air box (1) and connected to the air handling module. It is used to adjust the position of the air handling module so as to use the heat exchange module (2) and / or the filter module (3) to perform heat exchange and / or filtration on the air entering the return air box (1). The module moving device includes: a ring track (4), the central axis of which is perpendicular to the air inlet direction of the return air box (1), and the air handling module is arc-shaped and disposed in the ring track (4); the ring track (4) includes at least three areas: an air inlet area, an air outlet area, and a windproof area; wherein, the air inlet area is located on the air inlet side of the return air box (1), the air outlet area is located on the air outlet side of the return air box (1), and the windproof area is the area of ​​the ring track (4) other than the air inlet area and the air outlet area; when the heat exchange module (2) is located in the air inlet area or the air outlet area, the air handling device performs heat exchange on the air entering the return air box (1), and when the filter module (3) is located in the air inlet area or the air outlet area, the air handling device filters the air entering the return air box (1).

2. The fan coil unit according to claim 1, characterized in that, The module moving device also includes: Track support (5), the annular track (4) is mounted on the track support (5); The drive component (6) is connected to the air treatment module and is used to drive the air treatment module to rotate within the annular track (4) to adjust the position of the air treatment module.

3. The fan coil unit according to claim 1, characterized in that, Also includes: The air outlet box (7) is connected to the return air box (1); The heat exchanger (8) is located inside the air outlet box (7); A condensate circulation system is used to pass the condensate generated by the heat exchanger (8) into the heat exchange module (2) to exchange heat with the air entering the return air box (1).

4. The fan coil unit according to claim 3, characterized in that, The condensate circulation system includes: A condensate drip tray (9) is located below the heat exchanger (8); A condensate pipe (10) is connected to the condensate collection pan (9) and is used to transport the condensate. A connecting water pipe (11) is connected at one end to the condensate pipe (10) and at the other end to the heat exchange module (2) for introducing the condensate into the heat exchange module (2); wherein the connecting water pipe (11) is a retractable water pipe.

5. The fan coil unit according to claim 4, characterized in that, The condensate pipe (10) is provided with a first branch and a second branch. The first branch is close to the condensate receiving pan (9), and the second branch is close to the connecting water pipe (11). The condensate circulation system also includes: A condensate storage tank (12) is provided, with its inlet connected to the first branch and its outlet connected to the second branch.

6. The fan coil unit according to claim 5, characterized in that, The condensate circulation system also includes: The first water pump (13) is located on the condensate pipe (10) between the second branch and the connecting water pipe (11); The first control valve (14) is located on the condensate pipe (10) between the first branch and the second branch; The second water pump (15) is located on the second branch; The second control valve (16) is located on the first branch; The third control valve (17) is located at the drain outlet of the condensate storage chamber (12); The fourth control valve (18) is located on the second branch; The water level detector (19) is located inside the condensate storage chamber (12).

7. The fan coil unit according to claim 1, characterized in that, Also includes: An ambient temperature sensor (20) is used to detect the ambient temperature of the fan coil unit. An air quality detector (21) is located at the air inlet of the return air box (1) and is used to detect the air quality index.

8. A fan coil unit control method, applied to the fan coil unit as described in any one of claims 1 to 7, characterized in that, The method includes: The ambient temperature and air quality index of the fan coil unit were detected. The operating mode of the air handling unit is determined based on the ambient temperature and the air quality index; wherein, the operating mode includes: rapid cooling mode, rapid cooling and filtration mode, filtration mode, and normal cooling mode; The operation of the control module moving device and the condensate circulation system is controlled according to the operating mode.

9. The method according to claim 8, characterized in that, Determining the operating mode of the air handling unit based on the ambient temperature and the air quality index includes: Calculate the temperature difference between the ambient temperature and the preset temperature, and determine whether the temperature difference is greater than the preset difference; Determine whether the air quality index is greater than a preset index; When the temperature difference is greater than or equal to the preset difference and the air quality index is greater than the preset index, the operating mode is determined to be the rapid cooling mode; When the temperature difference is greater than or equal to the preset difference and the air quality index is not greater than the preset index, the operating mode is determined to be the rapid cooling and filtration mode. When the temperature difference is less than the preset difference and the air quality index is greater than the preset index, the operating mode is determined to be the normal cooling mode. When the temperature difference is less than the preset difference and the air quality index is not greater than the preset index, the operating mode is determined to be the filtration mode.

10. The method according to claim 8, characterized in that, The operation of the control module moving device and the condensate circulation system according to the operating mode includes: When the operating mode is the rapid cooling mode, the heat exchange module is controlled to be located in the air inlet area or the air outlet area, and the condensate circulation system is controlled to start. When the operating mode is the rapid cooling and filtration mode, the heat exchange module is controlled to be located in the air inlet area and the filtration module is located in the air outlet area, or the heat exchange module is located in the air outlet area and the filtration module is located in the air inlet area, and the condensate circulation system is controlled to be turned on. When the operating mode is the normal cooling mode, the heat exchange module and the filter module are controlled to be located in the windproof area; When the operating mode is the filtration mode, the heat exchange module is controlled to be located in the sheltered area, and the filtration module is located in the air inlet area or the air outlet area.

11. The method according to claim 10, characterized in that, Controlling the start of the condensate circulation system includes: Check if there is water in the condensate storage tank; If so, the water in the condensate storage tank is used for heat exchange in the heat exchange module; Otherwise, the water in the condensate collection pan is used for heat exchange of the heat exchange module.

12. The method according to claim 11, characterized in that, Using water from the condensate storage tank to exchange heat for the heat exchange module includes: controlling the first control valve to close, the second control valve and the fourth control valve to open, and the second water pump to start. Using water from the condensate collection pan for heat exchange in the heat exchange module includes: controlling the first control valve to open, the second control valve and the fourth control valve to close, and starting the first water pump.

13. The method according to claim 8, characterized in that, Also includes: After the fan coil unit stops, the ambient temperature is detected at preset time intervals. When the ambient temperature is less than or equal to the freezing point, the presence of water in the condensate storage chamber is detected. If water is present in the condensate storage chamber, the third control valve is opened to drain the water from the condensate storage chamber.

14. An air conditioning unit, characterized in that, Includes the fan coil unit as described in any one of claims 1 to 7.

15. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the fan coil control method as described in any one of claims 8 to 13.

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