Fan-coil, air conditioner and control method

Abstract

The application provides a fan coil, an air conditioner and a control method. The fan coil comprises: a shell, the shell comprising a containing cavity and an air suction port in communication with the containing cavity; a heat exchange assembly, the heat exchange assembly comprising a heat exchange pipeline and heat exchange fins, the heat exchange pipeline being used for feeding in refrigerant, and the heat exchange fins being used for dissipating heat of the refrigerant; the heat exchange fins being movably arranged so that air current entering the air suction port passes through the heat exchange fins; a filter assembly, the filter assembly comprising a filter screen, the filter screen being used for filtering impurities in the air current, and the filter screen being movably arranged so as to shield or avoid the air suction port; and a control module, the control module comprising a temperature sensing component used for detecting an external temperature and an air quality detector used for detecting external air quality, so as to control movement of the heat exchange fins according to a signal of the temperature sensing component and control movement of the filter screen according to a signal of the air quality detector, thereby solving the technical problem of poor comfort of an air conditioner with an air coil in the related art.

Description

Technical Field

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

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

[0003] However, in the hot summer, the fan coil unit often needs to run for a period of time to reach the preset temperature, greatly reducing comfort. During periods of severe air pollution such as smog, when air quality deteriorates significantly, the air blown out by the fan coil unit can harm human health.

[0004] Therefore, existing technologies need further development. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a fan coil unit, an air conditioner, and a control method to solve the technical problem of poor comfort in air conditioners with air coil units in related technologies.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: A fan coil unit, an air conditioner, and a control method are provided. The fan coil unit includes: a casing, the casing including a receiving cavity and an air intake communicating with the receiving cavity; a heat exchange assembly, the heat exchange assembly including heat exchange pipes and heat exchange fins, the heat exchange pipes for introducing refrigerant, and the heat exchange fins for dissipating heat from the refrigerant; the heat exchange fins are movably arranged so that airflow entering the air intake passes through the heat exchange fins; a filter assembly, the filter assembly including a filter screen for filtering impurities in the airflow, the filter screen being movably arranged to block or avoid the air intake; and a control module, the control module including a temperature sensing component for detecting external temperature and an air quality detector for detecting external air quality, to control the movement of the heat exchange fins according to the signal from the temperature sensing component, and to control the movement of the filter screen according to the signal from the air quality detector.

[0007] Furthermore, the fan coil unit also includes a fan impeller, which is disposed in the receiving cavity. The fan impeller is rotatably disposed to drive external airflow into the receiving cavity. Heat exchange fins are located between the fan impeller and the air inlet, and a filter screen is located between the fan impeller and the air inlet.

[0008] Furthermore, the heat exchange assembly includes a heat exchange drive element and a drive rod connected to the heat exchange drive element. The drive rod is connected to the heat exchange fins so that the heat exchange fins can be moved by driving the drive rod.

[0009] Furthermore, there are multiple heat exchange fins, which are mounted on a drive rod that is telescopically mounted. An elastic element is fitted onto the drive rod and connected to the heat exchange fins. The heat exchange drive unit moves the heat exchange fins by moving the elastic element.

[0010] Furthermore, the heat exchange drive component includes a first drive component and a second drive component, which are located on opposite sides of the air intake. The first drive component is driven to connect a first drive rod, and the second drive component is driven to connect a second drive rod. The heat exchange fins include a first heat exchange fin connected to the first drive rod and a second heat exchange fin connected to the second drive rod, so as to block the air intake by driving the first heat exchange fins and the second heat exchange fins to move towards each other. A first drive pad connected to the first heat exchange fin is provided at the end of the first drive rod away from the first drive component, and a second drive pad connected to the second heat exchange fin is provided at the end of the second drive rod away from the second drive component.

[0011] Furthermore, the heat exchange fins are provided with connection holes, and the heat exchange pipes pass through the connection holes.

[0012] Furthermore, there are multiple connection holes, and the heat exchange pipeline includes multiple heat exchange tube segments arranged at intervals. The multiple heat exchange tube segments are inserted into the multiple connection holes in a one-to-one correspondence. There is a protrusion between two adjacent connection holes, and the protrusion protrudes from the surface of the heat exchange fins.

[0013] Furthermore, the housing is provided with a guide rail, and the filter assembly includes: a filter drive component, which is driven by a movable rod connected to the filter screen; the movable rod is movably disposed within the guide rail to drive the filter screen to move.

[0014] Furthermore, air intakes are provided on both opposite sides of the casing, and there are two heat exchange components and two filter components. The two heat exchange components are arranged in a one-to-one correspondence with the two air intakes; the two filter components are arranged in a one-to-one correspondence with the two air intakes; and / or, an electric valve for controlling the opening and closing of the heat exchange pipeline is provided on the heat exchange pipeline, and the electric valve is connected to the control module signal.

[0015] An air conditioner, including a fan coil unit.

[0016] A control method applicable to fan coil units includes: setting a threshold A, comparing the temperature B measured by a temperature sensing element with A; if B≤A, controlling the heat exchange fins to avoid the air intake; if B>A, controlling the heat exchange fins to block the air intake.

[0017] Furthermore, the control method includes: setting a standard C, comparing the air quality index D measured by the air quality detector with C; if D ≥ 0.8C, then controlling the filter to avoid the air intake; if D < 0.8C, then controlling the filter to block the air intake.

[0018] Beneficial effects: The present invention provides a novel fan coil unit and its control method, which adjusts the working mode according to the actual temperature difference to achieve rapid cooling, and adjusts the working mode according to changes in air quality to filter air impurities and purify the air. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the fan coil unit used in an embodiment of the present invention; Figure 2 This is a schematic diagram of the heat exchange assembly of the fan coil unit used in an embodiment of the present invention; Figure 3 This is a schematic diagram of the heat exchange drive component of the fan coil unit used in an embodiment of the present invention; Figure 4 This is a schematic diagram of the elastic element of the fan coil unit used in an embodiment of the present invention; Figure 5 This is a schematic diagram of the heat exchange fins of the fan coil unit used in an embodiment of the present invention; Figure 6 This is a schematic diagram of the heat exchange tube section of the fan coil unit used in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the filter screen of the fan coil unit used in an embodiment of the present invention; Figure 8 This is a structural schematic diagram of the rapid cooling mode of the fan coil unit used in an embodiment of the present invention; Figure 9 This is a structural schematic diagram of the filtration mode of the fan coil unit used in an embodiment of the present invention; Figure 10 This is a schematic diagram of the rapid cooling and filtration mode of the fan coil unit used in an embodiment of the present invention; Figure 11 This is a flowchart of the control method used in an embodiment of the present invention.

[0020] The above figures include the following reference numerals: 1. Housing; 11. Receiving cavity; 12. Air inlet; 13. Guide rail; 2. Heat exchange assembly; 21. Heat exchange pipeline; 22. Heat exchange fins; 221. First heat exchange fin; 222. Second heat exchange fin; 223. Connecting hole; 224. Heat exchange pipe section; 23. Elastic element; 24. First drive gasket; 25. Second drive gasket; 26. Drive rod; 261. First drive rod; 27. Heat exchange drive component; 271. First drive component; 272. Second drive component; 3. Filter assembly; 31. Filter screen; 32. Filter drive component; 4. Temperature sensing component; 5. Air quality detector; 6. Fan impeller. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] According to an embodiment of the present invention, a fan coil unit is provided; please refer to [link / reference]. Figures 1 to 10 The system includes: a housing 1, which includes a receiving cavity 11 and an air intake 12 communicating with the receiving cavity 11; a heat exchange assembly 2, which includes a heat exchange pipe 21 and heat exchange fins 22, wherein the heat exchange pipe 21 is used to introduce refrigerant and the heat exchange fins 22 are used to dissipate the heat of the refrigerant; the heat exchange fins 22 are movably arranged so that the airflow entering the air intake 12 passes through the heat exchange fins 22; a filter assembly 3, which includes a filter screen 31, which is used to filter impurities in the airflow and is movably arranged to block or avoid the air intake 12; and a control module, which includes a temperature sensing component 4 for detecting the external temperature and an air quality detector 5 for detecting the external air quality, and controls the movement of the heat exchange fins 22 according to the signal from the temperature sensing component 4 and controls the movement of the filter screen 31 according to the signal from the air quality detector 5.

[0023] With the above settings, when the temperature sensing component 4 detects that the outside temperature is too high and exceeds the preset range, the control module controls the heat exchange fins 22 to move into the air intake 12 to assist the heat exchange pipe 21 in heat exchange. At this time, the air conditioner enters the rapid cooling mode. When the temperature sensing component 4 detects that the outside temperature is within the preset range, the control module controls the heat exchange fins 22 to move out of the air intake 12, and the heat exchange pipe 21 exchanges heat independently. At this time, the air conditioner is in normal cooling mode. At the same time, the air quality detector 5 monitors the outside air quality in real time. When the air quality detector 5 detects that the air quality index is within the preset standard and the air quality is good, the filter 31 avoids the air intake 12. When the air quality detector 5 detects that the air quality index exceeds the preset range and the air quality is poor, the control module controls the filter 31 to block the air intake 12 and filter the intake air. At this time, the air conditioner is in filtering mode. In this way, the air conditioner adjusts its working mode according to the actual temperature difference, thereby achieving a rapid cooling effect. At the same time, it adjusts its working mode according to changes in air quality, filters air impurities, and achieves the effect of purifying the air, thus solving the technical problem of poor comfort in air conditioners with air coils in related technologies.

[0024] In the fan coil unit of this embodiment, see Figures 1 to 2The fan coil unit also includes a fan impeller 6, which is disposed within the receiving cavity 11. The fan impeller 6 is rotatably mounted to drive external airflow into the receiving cavity 11. Heat exchange fins 22 are located between the fan impeller 6 and the air inlet 12, and a filter screen 31 is located between the fan impeller 6 and the air inlet 12. In this way, the rotation of the fan impeller 6 causes airflow to enter the receiving cavity through the air inlet 12. The movable heat exchange fins 22 and the filter screen 31 are disposed between the air inlet 12 and the fan impeller 6, allowing for flexible selection of whether the heat exchange fins 22 are needed to enhance the cooling effect and whether the filter screen 31 is needed to filter the air entering the air inlet 12, depending on environmental conditions.

[0025] In the fan coil unit of this embodiment, see Figures 1 to 3 The heat exchange assembly 2 includes a heat exchange drive 27 and a drive rod 26 connected to the heat exchange drive 27. The drive rod 26 is connected to the heat exchange fins 22, so that the heat exchange fins 22 can be moved by driving the drive rod 26. Thus, when the control module issues a command that the heat exchange fins 22 need to move to the air intake 12, the heat exchange drive 27 pushes the drive rod 26, and the drive rod 26 drives the heat exchange fins 22 to move towards the air intake 12 until the heat exchange fins 22 cover the air intake 12. Then, the heat exchange drive 27 stops pushing, and the heat exchange fins 22 cover the air intake 12, and heat exchange is performed together with the heat exchange pipeline 21.

[0026] In the fan coil unit of this embodiment, see Figures 1 to 4 Multiple heat exchange fins 22 are mounted on a drive rod 26, which is telescopically oriented. An elastic element 23 is fitted onto the drive rod 26 and connected to the heat exchange fins 22. The heat exchange drive unit 27 moves the heat exchange fins 22 by moving the elastic element 23. Thus, when the heat exchange drive unit 27 is in a stopped state, the elastic element 23 pushes the drive rod 26 according to its elasticity, and the drive rod 26 pulls the heat exchange fins 22 towards both sides of the air intake 12.

[0027] In the fan coil unit of this embodiment, see Figure 5The heat exchange drive component 27 includes a first drive component 271 and a second drive component 272, which are located on opposite sides of the air intake 12. The first drive component 271 is driven to connect to a first drive rod 261, and the second drive component 272 is driven to connect to a second drive rod 262. The heat exchange fins 22 include a first heat exchange fin 221 connected to the first drive rod 261 and a second heat exchange fin 222 connected to the second drive rod 262, so as to block the air intake 12 by driving the first heat exchange fin 221 and the second heat exchange fin 222 to move towards each other. The end of the first drive rod 261 away from the first drive component 271 is provided with a first drive pad 24 connected to the first heat exchange fin 221, and the end of the second drive rod 262 away from the second drive component 272 is provided with a second drive pad 25 connected to the second heat exchange fin 222. In this way, the heat exchange fins 22 are fixed to the housing 1 on the side closer to the heat exchange drive 27. The heat exchange fins 22 move away from the heat exchange drive 27 with the drive rod 26 and the first drive pad 24 or the second drive pad 25. When the heat exchange fins 22 need to move toward the air intake 12, the heat exchange drive 27 is activated, pushing the drive rod 26 to move the heat exchange fins 22, so that the heat exchange fins 22 move toward the air intake 12. When the heat exchange fins 22 need to move to both sides of the air intake 12, the elastic element 23 contracts according to its own elasticity to pull the first drive pad 24 or the second drive pad 25. The first drive pad 24 or the second drive pad 25 pulls the heat exchange fins 22 to both sides of the air intake 12.

[0028] In the fan coil unit of this embodiment, see Figure 6 The heat exchange fins 22 are provided with connection holes 223, and the heat exchange pipes 21 pass through the connection holes 223. In this way, the heat exchange pipes 21 pass through the connection holes 223 and are laid flat at the air intake 12. When the temperature sensing component 4 detects that the outside temperature does not exceed the preset value, heat is exchanged only through the heat exchange pipes 21 at the air intake 12 to achieve the cooling effect.

[0029] In the fan coil unit of this embodiment, see Figure 6 The heat exchange pipe 21 includes multiple connecting holes 223 and multiple heat exchange pipe segments 224 arranged at intervals. Each heat exchange pipe segment 224 is correspondingly inserted into one of the multiple connecting holes 223. A protrusion 225 protrudes from the surface of the heat exchange fins 22 between adjacent connecting holes 223. This arrangement of multiple heat exchange pipes 21 and multiple heat exchange pipe segments 224 increases the contact area between the heat exchange pipe 21 and the air passing through the air intake 12, thus improving the heat exchange effect of the heat exchange pipe 21.

[0030] In the fan coil unit of this embodiment, see Figure 7The housing 1 is provided with a guide rail 13. The filter assembly 3 includes a filter drive component 32, which is driven by a movable rod connected to a filter screen 31. The movable rod is movably disposed within the guide rail 13 to drive the filter screen 31 to move. In this way, the filter drive component 32 pushes the movable rod to move within the guide rail 13, and the movable rod then pushes the filter screen closer to or away from the air intake 12.

[0031] In the fan coil unit of this embodiment, see Figures 1 to 10 Each side of the casing 1 has an air intake 12. There are two heat exchange components 2 and two filter components 3, with each heat exchange component 2 corresponding to one air intake 12. Similarly, each filter component 3 corresponds to one air intake 12. And / or, an electric valve 211 is installed on the heat exchange pipeline 21 to control its opening and closing, and the electric valve 211 is connected to the control module. This arrangement of air intakes 12 on both sides of the casing 1 increases the airflow through them, effectively improving the heat exchange efficiency of the corresponding heat exchange components 2. Simultaneously, the corresponding arrangement of the filter components 3 and air intakes 12 ensures that air passing through the air intakes 12 on both sides is purified by the filter assembly 3, improving the efficiency of air purification.

[0032] This embodiment provides an air conditioner, including the above-mentioned fan coil unit.

[0033] This embodiment provides a control method, see [link / reference] Figure 11 The control method applicable to the above-mentioned fan coil unit includes: setting a threshold A, comparing the temperature B measured by the temperature sensing component 4 with A; if B≤A, controlling the heat exchange fins 22 to avoid the air intake 12; if B>A, controlling the heat exchange fins 22 to block the air intake 12.

[0034] In the control method of this embodiment, see Figure 11 The control method includes: setting a standard C, comparing the air quality index D measured by the air quality detector 5 with C; if D ≥ 0.8C, controlling the filter 31 to avoid the air intake 12; if D < 0.8C, controlling the filter 31 to block the air intake 12. Setting a threshold A, comparing the temperature B measured by the temperature sensing component 4 with A; if B ≤ A, controlling the filter 31 to avoid the air intake 12; if B > A, controlling the filter 31 to block the air intake 12.

[0035] Example 1: Specifically, the temperature sensing component 4 detects the external temperature. If the difference between the measured temperature and the preset temperature is ≤10℃, it enters the normal heat exchange mode. (See [link]). Figure 1The elastic element 23 is in a compressed state, the heat exchange fins 22 are located on both sides of the air intake 12, and the filter screen 31 is located on the outside of the air intake 12. Then the air quality detector 5 performs detection. When the air quality index is higher than 80% of the standard value, the air conditioner still maintains the normal heat exchange mode. At this time, the air intake resistance of the air intake 12 is the smallest and the air intake efficiency is the highest.

[0036] Example 2: When the air quality index is below 80% of the standard value, the filter drive 32 is activated, and the filter screen 31 slides along the guide rail 13 to the air intake 12, entering the filtration mode. (See below) Figure 9 This can greatly improve air quality.

[0037] Example 3: If the measured temperature differs from the preset temperature by ≥10℃, the heat exchange drive component 27 and the elastic component 23 are activated. The heat exchange fins 22 are pushed to the air intake 12 by the drive rod 26, providing auxiliary heat exchange in the heat exchange pipeline 21, and entering the rapid cooling mode. See [link / reference needed]. Figure 8 Then the air quality detector will perform a test. When the index is 80% higher than the standard, the rapid cooling mode will still be maintained. This mode can quickly improve the cooling efficiency and quickly reach the preset temperature.

[0038] Example 4: When the index is below 80% of the standard, the filter drive 32 is activated, and the filter screen 31 moves along the guide rail 12 to the air intake 12, entering the rapid cooling filtration mode. (See below) Figure 10 This mode not only quickly reaches the preset temperature but also significantly improves air quality. Afterward, the fan coil unit starts running, checking at preset intervals, and this cycle repeats.

[0039] Example 5: Before the fan coil unit is about to stop running, it is reset to normal mode. If it is in rapid cooling mode before stopping, the heat exchange drive 27 is activated, and the first drive pad 24 and the second drive pad 25 push the heat exchange fins 22 to move to both sides of the air intake 12. If it is in filtration mode before stopping, the filter drive 32 is activated, and the filter screen 31 moves along the guide rail 13 to the outside of the air intake 12. If it is in rapid cooling filtration mode before stopping, the heat exchange drive 27 and the filter drive 32 are activated simultaneously to perform the above actions until the fan is in normal mode.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0042] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0043] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0044] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A fan coil unit, characterized in that, include: The housing (1) includes a receiving cavity (11) and an air intake (12) communicating with the receiving cavity (11). The heat exchange assembly (2) includes a heat exchange pipe (21) and heat exchange fins (22). The heat exchange pipe (21) is used to introduce refrigerant, and the heat exchange fins (22) are used to dissipate the heat of the refrigerant. The heat exchange fins (22) are movably arranged so that the airflow entering the air intake (12) passes through the heat exchange fins (22). The filter assembly (3) includes a filter screen (31) for filtering impurities in the airflow. The filter screen (31) is movably arranged to block or avoid the air intake (12). The control module includes a temperature sensing component (4) for detecting the external temperature and an air quality detector (5) for detecting the external air quality, so as to control the movement of the heat exchange fins (22) according to the signal of the temperature sensing component (4) and control the movement of the filter screen (31) according to the signal of the air quality detector (5); The fan coil unit also includes a fan impeller (6), which is disposed in the receiving cavity (11). The fan impeller (6) is rotatably disposed to drive external airflow into the receiving cavity (11). The heat exchange fins (22) are located between the fan impeller (6) and the air inlet (12), and the filter screen (31) is located between the fan impeller (6) and the air inlet (12). The heat exchange assembly (2) includes a heat exchange drive (27) and a drive rod (26) connected to the heat exchange drive (27). The drive rod (26) is connected to the heat exchange fins (22) so that the heat exchange fins (22) can be moved by driving the drive rod (26). There are multiple heat exchange fins (22), and the multiple heat exchange fins (22) are arranged on the drive rod (26). The drive rod (26) is telescopically arranged. An elastic element (23) is sleeved on the drive rod (26). The elastic element (23) is connected to the heat exchange fins (22). The heat exchange drive (27) moves the heat exchange fins (22) by driving the elastic element (23) to move.

2. The fan coil unit according to claim 1, characterized in that, The heat exchange drive component (27) includes a first drive component (271) and a second drive component (272), which are located on opposite sides of the air intake (12); the first drive component (271) is driven to be connected to a first drive rod (261), and the second drive component (272) is driven to be connected to a second drive rod (262); the heat exchange fins (22) include a first heat exchange fin (221) connected to the first drive rod (261) and a second drive rod (262) connected to the second drive rod (272); The second heat exchange fin (222) connected to the first heat exchange fin (221) and the second heat exchange fin (222) is used to block the air intake (12) by driving the first heat exchange fin (221) and the second heat exchange fin (222) to move towards each other; the first drive rod (261) is provided with a first drive pad (24) connected to the first heat exchange fin (221) at one end away from the first drive component (271), and the second drive rod (262) is provided with a second drive pad (25) connected to the second heat exchange fin (222) at one end away from the second drive component (272).

3. The fan coil unit according to claim 1, characterized in that, The heat exchange fins (22) are provided with connection holes (223), and the heat exchange pipes (21) pass through the connection holes (223).

4. The fan coil unit according to claim 3, characterized in that, There are multiple connection holes (223), and the heat exchange pipeline (21) includes multiple heat exchange tube segments (224) arranged at intervals. The multiple heat exchange tube segments (224) are inserted into the multiple connection holes (223) in a one-to-one correspondence. There is a protrusion (225) between two adjacent connection holes (223), and the protrusion (225) protrudes from the surface of the heat exchange fins (22).

5. The fan coil unit according to claim 1, characterized in that, The housing (1) is provided with a guide rail (13), and the filter assembly (3) includes: A filter drive unit (32) is driven to connect a movable rod, which is connected to the filter screen (31). The movable rod is movably arranged within the guide rail (13) to drive the filter screen (31) to move.

6. The fan coil unit according to claim 1, characterized in that, The housing (1) has air inlets (12) on both opposite sides. There are two heat exchange components (2) and two filter components (3). Each heat exchange component (2) is corresponding to one of the two air inlets (12); each filter component (3) is corresponding to one of the two air inlets (12); and / or, The heat exchange pipeline (21) is equipped with an electric valve (211) for controlling the opening and closing of the heat exchange pipeline (21), and the electric valve (211) is connected to the control module.

7. An air conditioner, comprising a fan coil unit, characterized in that, The fan coil unit is the fan coil unit according to any one of claims 1 to 6.

8. A control method applicable to the fan coil unit according to any one of claims 1 to 6, characterized in that, The control method includes: Set a threshold A, and compare the temperature B measured by the temperature sensing component (4) with A; If B≤A, then control the heat exchange fins (22) to avoid the air intake (12). If B > A, then control the heat exchange fins (22) to block the air intake (12).

9. The control method according to claim 8, characterized in that, The control method includes: Set standard C, and compare the air quality index D measured by the air quality detector (5) with C; If D≥0.8C, then control the filter (31) to avoid the air intake (12). If D < 0.8C, then control the filter (31) to block the air intake (12).

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