Method and apparatus for controlling air speed of fan coil, computer storage medium, and air conditioner

Abstract

The present application provides a method and apparatus for controlling the air speed of a fan coil, a computer storage medium, and an air conditioner. The method comprises: on the basis of a historical air speed gear, determining an air speed gear adjustment strategy, wherein the historical air speed gear is an air speed gear corresponding to a fan coil before the latest shutdown of the fan coil; acquiring the current measured temperature, and comparing the current measured temperature with a temperature limit range to obtain a temperature comparison result; on the basis of the air speed gear adjustment strategy and by means of the temperature comparison result, adjusting the current air speed gear; and using the adjusted air speed gear to control the fan coil. The level of comfort of users indoors can be improved.

Description

Fan coil unit wind speed control method, device, computer storage medium and air conditioner

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311023322.3, filed on August 14, 2023, entitled “Fan Coil Unit Wind Speed ​​Control Method, Device, Computer Storage Medium and Air Conditioner,” which is hereby incorporated by reference in its entirety. Technical Field

[0003] The present application relates to the field of air conditioning technology, and more specifically, to a fan coil unit wind speed control method, device, computer storage medium and air conditioner in the field of fan coil unit control technology. Background Art

[0004] Fan coil units, as the terminal devices of air conditioning systems, directly regulate indoor temperature. Currently, fan coil units have poor control accuracy and cannot adjust air volume in a timely manner according to indoor temperature changes, affecting the comfort level of indoor users.

[0005] Summary of the Invention

[0006] The present application provides a fan coil unit wind speed control method, device, computer storage medium and air conditioner. The fan coil unit wind speed control method can improve the control accuracy of the fan coil unit, and can adjust the air volume in time according to changes in indoor temperature, thereby improving the user's comfort level.

[0007] In a first aspect, a method for controlling wind speed of a fan coil unit is provided, the method comprising:

[0008] Determining a wind speed gear adjustment strategy based on historical wind speed gears; wherein the historical wind speed gear refers to the wind speed gear corresponding to the fan coil unit before the most recent shutdown;

[0009] Obtaining a current detected temperature, comparing the current detected temperature with a limit temperature range, and obtaining a temperature comparison result;

[0010] Adjusting the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result;

[0011] The fan coil unit is controlled using the adjusted wind speed gear.

[0012] In a second aspect, a fan coil unit wind speed control device is provided, the device comprising:

[0013] A determination module, configured to determine a wind speed level adjustment strategy based on a historical wind speed level; wherein the historical wind speed level refers to a wind speed level corresponding to the fan coil unit before the fan coil unit was most recently shut down;

[0014] A comparison module is used to obtain the current detection temperature, compare the current detection temperature with the limit temperature range, and obtain a temperature comparison result;

[0015] An adjustment module, configured to adjust the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result;

[0016] The control module is used to control the fan coil unit using the adjusted wind speed gear.

[0017] In a third aspect, a computer program product is provided, comprising: a computer program code, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect.

[0018] In a fourth aspect, a computer storage medium is provided, wherein the computer storage medium stores computer program code, and when the computer program is executed, the method in the above-mentioned first aspect or any possible implementation manner of the first aspect is implemented.

[0019] In a fifth aspect, an air conditioner is provided, comprising:

[0020] a memory for storing executable program code;

[0021] A processor is used to call and run the executable program code from the memory, so that the air conditioner executes the method in the above-mentioned first aspect or any possible implementation of the first aspect.

[0022] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0023] The embodiments of the present application provide a fan coil unit wind speed control method, device, computer storage medium and air conditioner, which determines a wind speed level adjustment strategy based on historical wind speed levels; wherein the historical wind speed level refers to the wind speed level corresponding to the fan coil unit before the most recent shutdown; obtains the current detected temperature, compares the current detected temperature with the limit temperature range, and obtains a temperature comparison result; adjusts the current wind speed level based on the wind speed level adjustment strategy and adopts the temperature comparison result, and can determine the current wind speed level adjustment strategy based on the wind speed level corresponding to the last shutdown. In this way, different wind speed levels can be automatically matched to corresponding load sizes when the room temperature reaches a set value. On the one hand, it avoids frequent switching of wind speed levels due to inappropriate wind speed levels, can improve temperature control accuracy, and make the fan coil unit operate with minimal energy consumption as much as possible. On the other hand, it can improve the overall comfort level. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of the opening and closing control of a water valve (cooling mode) in the related art;

[0025] FIG2 is a schematic diagram of the gear control of a fan coil unit (cooling mode) in the related art;

[0026] FIG3 is a schematic diagram of the architecture of a fan coil unit wind speed control system provided in an embodiment of the present application;

[0027] FIG4 is a flow chart of a fan coil unit wind speed control method provided in an embodiment of the present application;

[0028] FIG5 is a flow chart of another fan coil unit wind speed control method provided in an embodiment of the present application;

[0029] FIG6 is a schematic diagram showing the comparison between the indoor temperature and the limit temperature range in cooling mode;

[0030] FIG7 is a schematic diagram showing the comparison between the indoor temperature and the limit temperature range in the heating mode;

[0031] FIG8 is a schematic diagram of a wind speed gear adjustment strategy corresponding to the third gear being the target gear in cooling mode;

[0032] FIG9 is a schematic diagram of a wind speed gear adjustment strategy corresponding to the first gear being the target gear in cooling mode;

[0033] FIG10 is a schematic diagram of a wind speed gear adjustment strategy corresponding to the third gear being the target gear in heating mode;

[0034] FIG11 is a schematic diagram of a wind speed gear adjustment strategy corresponding to the first gear being the target gear in the heating mode;

[0035] Figures 12 and 13 are schematic diagrams of the medium-speed adjustment strategy in cooling mode;

[0036] Figures 14 and 15 are schematic diagrams of the low wind speed adjustment strategy in cooling mode;

[0037] Figures 16 and 17 are schematic diagrams of the medium-speed adjustment strategy in heating mode;

[0038] Figures 18 and 19 are schematic diagrams of the low wind speed adjustment strategy in heating mode;

[0039] FIG20 is a schematic diagram of the overall wind speed adjustment strategy in cooling mode;

[0040] FIG21 is a schematic diagram of the overall wind speed level adjustment strategy in heating mode;

[0041] FIG22 is a schematic structural diagram of a fan coil unit wind speed control device provided in an embodiment of the present application;

[0042] Figure 23 is a structural schematic diagram of an air conditioner provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will clearly and thoroughly describe the technical solutions in this application in conjunction with the accompanying drawings. In the description of the embodiments of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more than two.

[0044] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0045] When fan coil units are actually used, in most cases the air outlet speed of the fan coil units is often set to a certain wind speed level in manual mode or automatic mode.

[0046] Taking the case where a fan coil unit is used to cool the indoor temperature and is in automatic mode as an example, the fan coil unit has problems with slow cooling and insufficient control accuracy in controlling the indoor temperature.

[0047] Specifically, please refer to Figures 1 and 2. Figure 1 shows a schematic diagram of the opening and closing control of the water valve (cooling mode) in the related art; Figure 2 shows a schematic diagram of the gear control of the fan coil unit (cooling mode) in the related art.

[0048] As shown in Figures 1 and 2, taking the fan coil unit in cooling mode as an example, the set temperature of the indoor temperature (the temperature value set by the user as needed) is W. SDC1 is the conversion deviation corresponding to the wind speed gear P1, SDC2 is the conversion deviation corresponding to the wind speed gear P2, and SDC3 is the conversion deviation corresponding to the wind speed gear P3; the conversion deviation (including SDC1, SDC2 and SDC3, wherein the values ​​of SDC1, SDC2 and SDC3 can be equal or different, and can be set according to the actual situation, and this application does not limit it) has a value range of 0.5°C to 6.0°C, and the default conversion deviation value is usually 1°C. As shown in Figure 1, the set temperature range of the indoor temperature is (W-0.5×SDC1, W+0.5×SDC1). The set temperature range of the indoor temperature can be understood as the allowable deviation range of the set temperature value W of the indoor temperature.

[0049] When the indoor temperature is lower than the lower limit of the set temperature range (W-0.5×SDC1, W+0.5×SDC1), the water valve (the water valve is used to control the water inlet and outlet of the fan coil) is closed and the fan coil is shut down (it should be noted that the fan coil shutdown in this application means that the fan in the fan coil is shut down and the fan coil stops discharging air). When the indoor temperature rises to a value exceeding the upper limit of the set temperature range (W-0.5×SDC1, W+0.5×SDC1) (i.e., W+0.5×SDC1), the water valve opens and the fan coil is switched to low wind speed, and the fan coil operates at low wind speed. When the indoor temperature further rises to a value exceeding W+1 / 2SDC1+SDC2, the fan coil is switched from low wind speed to medium wind speed, and the fan coil operates at medium wind speed, at which time the water valve is in the open state. When the indoor temperature further rises to exceed W+1 / 2SDC1+SDC2+SDC3, the fan coil unit switches from medium to high speed and operates at high speed, at which point the water valve is open. Furthermore, when the indoor temperature drops below the set temperature value W+1 / 2SDC1+SDC2, the fan coil unit switches from high to medium speed and operates at medium speed, at which point the water valve is open. When the indoor temperature further drops below the upper limit of the set temperature range (W-0.5×SDC1, W+0.5×SDC1) (i.e., W+0.5×SDC1), the fan coil unit switches from medium to low speed and operates at low speed, at which point the water valve is open. When the indoor temperature further drops to below the lower limit value (ie W-0.5×SDC1) of the set temperature range (W-0.5×SDC1, W+0.5×SDC1), the fan coil unit is shut down and the water valve is closed.

[0050] Taking the fan coil unit in cooling mode as an example, when the fan coil unit is just turned on, the indoor temperature is often high (for example, the indoor temperature exceeds W+1 / 2SDC1+SDC2+SDC3). As the indoor temperature continues to drop, the fan coil unit's gear level continues to decrease. For example, when the indoor temperature drops below W+1 / 2SDC1+SDC2, the fan coil unit switches from high wind speed to medium wind speed. When the indoor temperature further drops to below the upper limit of the set temperature range (W-0.5×SDC1, W+0.5×SDC1) (that is, W+0.5×SDC1), the fan coil unit switches from medium wind speed to low wind speed. As a result, the fan coil unit's air volume gradually decreases during the process of switching from high wind speed to medium wind speed and further to low wind speed, and the cooling rate of the indoor temperature also gradually decreases, resulting in the indoor temperature not being able to quickly drop to the set temperature value, affecting the user's comfort level.

[0051] At the same time, when the fan coil unit is at low speed, the fan coil unit's air volume is low, and it can often only meet the demand when the indoor temperature rises slightly relative to the set temperature value W. When the indoor temperature rises significantly relative to the set temperature value W, the air volume of the fan coil unit at low speed cannot meet the indoor temperature cooling demand, causing the fan coil unit to switch between low and medium speeds. This situation causes the indoor temperature to fluctuate around the upper limit of the set temperature range (W-0.5×SDC1, W+0.5×SDC1), resulting in a steady-state deviation of the indoor temperature and failure to reach the set temperature value W.

[0052] In order to solve the above problem, please refer to FIG3 , which is a schematic diagram of the architecture of a fan coil unit wind speed control system provided in an embodiment of the present application.

[0053] The fan coil unit 20, as the terminal device of the air conditioning system (usually a central air conditioning system), directly participates in regulating the indoor temperature. The fan coil unit 20 mainly uses the fan component to exchange heat between the air and the cold water or hot water in the coil, and outputs the cooled or heated air to the room, thereby lowering or raising the indoor temperature.

[0054] As shown in Figure 3, fan coil unit 20 typically includes a chassis 21, fans 22, coil units 23, and a controller 24. Fans 22 and coil units 23 are located within chassis 21. Controller 24 is typically located within chassis 21. In some embodiments, the controller may also be located outside chassis 21. This is not a limitation in this application and can be configured based on actual needs. Chassis 21 has an air inlet 211 for air intake and an air outlet 212 for air exhaust.

[0055] The controller 24 is in communication with the fan 22 and the coil 23. Specifically, the controller 24 controls the airflow of the fan 22 by controlling the gear position of the fan 22. The controller 24 controls the amount of cold water or hot water flowing into and out of the coil 23 and the speed at which the cold water or hot water circulates within the coil 23 by controlling the coil 23.

[0056] When the fan coil unit 20 is cooling, cold water enters the water inlet of the coil unit 23 and circulates within the coil unit 23. At this time, the controller 24 of the fan coil unit 20 controls the fan 22 to operate, allowing air to enter the chassis 21 through the air inlet and exchange heat with the cold water in the coil unit 23 to cool the air. The cooled air is then sent out of the chassis 21 through the fan 22 into the room, thereby cooling the indoor temperature.

[0057] When fan coil unit 20 is heating, hot water enters the water inlet of coil unit 23 and circulates within coil unit 23. At this time, controller 24 of fan coil unit 20 controls fan 22 to operate, allowing air to enter chassis 21 through the air inlet and exchange heat with the hot water in coil unit 23, thereby heating the air. The heated air is then transported out of chassis 21 into the room via fan 22, thereby heating the room.

[0058] Temperature regulation methods generally include air volume regulation and water volume regulation. The so-called air volume regulation is to control the gear position of the fan 22 through the controller 24 of the fan coil unit 20 to control the air volume of the fan coil unit 20. Specifically, the higher the gear position of the fan 22, the greater the air volume of the fan coil unit 20, and the faster the indoor temperature drops (or rises); the lower the gear position of the fan 22, the smaller the air volume of the fan coil unit 20, and the slower the indoor temperature drops (or rises). The fan coil unit 20 controls the on and off of the fan 22 and the gear position of the fan 22 through the controller 24 to control the air volume of the fan coil unit 20.

[0059] Indoor air circulates through the fan coil unit 20, being cooled or heated by the coil unit 23 to maintain the required indoor temperature. Therefore, by controlling the air flow rate of the fan coil unit 20, the circulation rate of the indoor air can be controlled, thereby controlling the rate at which the indoor temperature decreases or increases.

[0060] It should be noted that in the embodiments of the present application, the fan coil unit can have at least the following operating states: on, off, and stopped. On means the fan coil unit is powered on; off means the fan coil unit is powered off; and stopped means the fan coil unit is powered on but not turned on, and the water valve is closed.

[0061] Furthermore, the applicant used TRNSYS (Transient System Simulation Program) software to establish a simulation platform to verify and compare the fan coil unit speed control method proposed in this application with conventional fan coil unit speed control methods. Given identical room parameters, temperature setpoints, and fan coil unit specifications, the fan coil unit speed control method proposed in this application achieved faster adjustment speed and higher control accuracy for indoor temperature regulation.

[0062] Next, please refer to Figure 4, which is a flow chart of a fan coil unit wind speed control method provided by an embodiment of the present application. As shown in Figure 4, the fan coil unit wind speed control method includes the following steps:

[0063] S401: Determine a wind speed level adjustment strategy based on historical wind speed levels.

[0064] The historical wind speed level refers to the wind speed level corresponding to the fan coil unit's most recent shutdown, i.e., the level before the last temperature-reaching shutdown. For example, if the fan coil unit is operating at a medium speed level and shuts down due to temperature reaching the temperature, the historical wind speed level will be the medium speed level after the fan coil unit is turned on again. If the fan coil unit is operating at a low speed level and shuts down due to temperature reaching the temperature, the historical wind speed level will be the low speed level after the fan coil unit is turned on again. At the time of the temperature-reaching shutdown, the fan coil unit is in the on state, but the fan coil unit is not turned on, and the water valve is in the closed state.

[0065] Specifically, different historical wind speed levels correspond to different wind speed level adjustment strategies. If the historical wind speed level is medium, the corresponding wind speed level adjustment strategy is the medium wind level adjustment strategy; if the historical wind speed level is low, the corresponding wind speed level adjustment strategy is the low wind level adjustment strategy. The specific wind speed level adjustment strategy will be described in detail in subsequent embodiments and will not be described in detail here.

[0066] S402: Acquire the current detected temperature, compare the current detected temperature with the limit temperature range, and obtain a temperature comparison result.

[0067] Specifically, the current detected temperature is the currently detected indoor temperature (denoted as T1 in this embodiment of the application). The restricted temperature range is the temperature range for adjusting the wind speed gear. The restricted temperature range can include a set temperature and multiple critical temperatures. The temperature comparison result is a comparison of the current detected temperature with the set temperature or critical temperature in the restricted temperature range, and the relationship between the current detected temperature and the set temperature or critical temperature in the restricted temperature range is obtained.

[0068] S403: Adjust the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result.

[0069] Specifically, the set temperature and each critical temperature serve as the basis for adjusting the wind speed level. For example, when the indoor temperature is below a critical temperature or the set temperature, the wind speed level can be reduced, while when the indoor temperature is above a critical temperature, the wind speed level can be increased. The specific method of adjusting the wind speed level is known as the wind speed level adjustment strategy, which is related to the historical wind speed level.

[0070] S404: Control the fan coil unit using the adjusted wind speed level.

[0071] In the embodiment of the present application, the wind speed gears may include: the first gear, the second gear, the third gear and the shutdown gear. Among them, the first gear is higher than the second gear, the third gear is higher than the first gear, and the second gear is higher than the shutdown gear. The shutdown gear is the temperature shutdown. That is, the order from low to high is: shutdown gear, second gear, first gear, third gear. For example, in some possible embodiments, the first gear may be a medium wind gear, the second gear may be a low wind gear, and the third gear may be a high wind gear. The embodiment of the present application may not limit the number of wind speed gears other than the shutdown gear, that is, in the specific implementation, it may include fewer or more wind speed gears. The subsequent embodiments of the present application are all described by taking the first gear as the medium wind gear, the second gear as the low wind gear, and the third gear as the high wind gear as an example.

[0072] The embodiments of the present application can determine a wind speed gear adjustment strategy based on historical wind speed gears; obtain the current detected temperature, compare the current detected temperature with the limit temperature range, and obtain a temperature comparison result; adjust the current wind speed gear based on the wind speed gear adjustment strategy and adopt the temperature comparison result. The current wind speed gear adjustment strategy can be determined based on the corresponding wind speed gear before the last shutdown. In this way, when the room temperature reaches near the set value, different wind speeds can be automatically matched to the corresponding load size. On the one hand, it avoids frequent switching of wind speeds due to inappropriate wind speeds, can improve the temperature control accuracy, and make the fan coil run with the minimum energy consumption as much as possible. On the other hand, it can improve the overall comfort level.

[0073] In some possible embodiments, when the fan coil unit is just turned on, in order to quickly adjust the indoor temperature, after receiving the power-on command, the current wind speed level can be set to the third level (high wind level) in response to the power-on command, and then the adjustment strategy corresponding to the high wind level can be executed.

[0074] Please refer to Figure 5 for details. Figure 5 exemplarily shows a flow chart of a fan coil unit wind speed control method when the fan coil unit is just turned on. As shown in Figure 5 , the fan coil unit wind speed control method includes the following steps:

[0075] S501: In response to a power-on instruction, obtaining a first detected temperature, comparing the first detected temperature with a limit temperature range, and obtaining a first temperature comparison result.

[0076] Specifically, the power-on instruction is an instruction for controlling the fan coil unit to switch from an off state to an on state.

[0077] Optionally, the power-on command may be manually input by the user, such as, but not limited to, a user operation on a power-on control. The power-on control may be, for example, a button on a remote control associated with the air conditioner, or a button on the air conditioner itself, in which case the user operation is a press operation. The power-on control may also be a control within an application (or mini-program) associated with the air conditioner, in which case the user operation may be a touch operation.

[0078] Optionally, the power-on command can be input by user voice, for example, the user can issue a voice command. In some possible embodiments, the voice command is a trigger word plus the power-on command. Exemplarily, the voice command is "Xiaomei Xiaomei, please turn on the phone."

[0079] Optionally, the power-on command can be automatically triggered by a timed power-on function. For example, the user can set a timed power-on function in advance, and then when the set time is reached, the air conditioner will generate a power-on command and automatically turn on.

[0080] Specifically, the first detected temperature is the indoor temperature when the machine is turned on. The restricted temperature range is the temperature range within which the wind speed is adjusted. The restricted temperature range includes a set temperature and multiple critical temperatures. The temperature comparison result is a comparison of the first detected temperature with the set temperature or critical temperature within the restricted temperature range, thereby determining the relative magnitude of the first detected temperature and the set temperature or critical temperature within the restricted temperature range.

[0081] S502: Setting the wind speed level to a target level according to the first temperature comparison result.

[0082] Specifically, the target gear may be a high wind gear, a low wind gear, or a shutdown gear.

[0083] As you can see, generally speaking, air conditioners can have multiple different operating modes, that is, fan coil unit operating modes, such as cooling mode and heating mode. In different operating modes, the first temperature comparison results and target gears are different.

[0084] In cooling mode, refer to Figure 6 . The restricted temperature range may include: set temperature (TS), first critical temperature (TS+DT1+DT2), second critical temperature (TS-DT4), and fourth critical temperature (TS+DT1+DT2+DT3). If the first temperature comparison result shows that the first detected temperature is greater than the set temperature, the fan speed level is set to level 3, which is the target level.

[0085] In cooling mode, referring to FIG6 , if the first temperature comparison result is that the first detected temperature is less than or equal to the set temperature and greater than the second critical temperature (TS-DT4), the wind speed level is set to the first level, that is, the first level is the target level.

[0086] It can be seen that in the cooling mode, if the first temperature comparison result is that the first detection temperature is less than or equal to the second critical temperature (TS-DT4), the fan will not be turned on, that is, the target gear is the shutdown gear.

[0087] In the heating mode, referring to FIG. 7 , the restricted temperature range may include at least: a set temperature (TS), a fifth critical temperature (TS-DT1-DT2), a sixth critical temperature (TS+DT4), and an eighth critical temperature (TS-DT1-DT2-DT3).

[0088] If the first temperature comparison result is that the first detected temperature is lower than the set temperature, the wind speed gear is set to the third gear, that is, the third gear is the target gear.

[0089] In the heating mode, please continue to refer to FIG. 7 . If the first temperature comparison result is that the first detected temperature is greater than or equal to the set temperature and less than the sixth critical temperature (TS+DT4), the wind speed level is set to the first level, that is, the first level is the target level.

[0090] It can be seen that in the heating mode, if the first temperature comparison result is that the first detection temperature is greater than or equal to the sixth critical temperature (TS+DT4), the fan is not turned on, that is, the target gear is the shutdown gear.

[0091] S503: lowering the wind speed gear to a shutdown gear using a wind speed gear adjustment strategy corresponding to the target gear.

[0092] As you can see, as the fan coil unit operates, the indoor temperature may change. The target speed may no longer match the changed indoor temperature. Therefore, in some scenarios, the fan speed may be reduced to the shutdown level (i.e., temperature-reaching shutdown). However, different operating modes and target speeds correspond to different fan speed adjustment strategies.

[0093] Please refer to Figures 6 and 8. In cooling mode, if the target gear is the third gear, the corresponding wind speed gear adjustment strategy is:

[0094] After the fan coil unit has been running at the third gear for a period of time (for example, but not limited to 3 minutes), the second detected temperature (that is, the indoor temperature collected after the fan coil unit has been running at the third gear for a period of time) can be obtained, and the second detected temperature can be compared with the limit temperature range to obtain a second temperature comparison result; if the second temperature comparison result is that the second detected temperature is lower than the set temperature in the limit temperature range, the current wind speed gear is reduced from the third gear to the first gear.

[0095] After the fan coil unit has been running at the first gear for a period of time (for example but not limited to 3 minutes), a third detected temperature can be obtained (that is, the indoor temperature collected after the fan coil unit has been running at the first gear for a period of time), and the third detected temperature can be compared with the limit temperature range to obtain a third temperature comparison result; if the third temperature comparison result is that the third detected temperature is lower than the second critical temperature in the limit temperature range, the current wind speed gear is adjusted from the first gear to the shutdown gear.

[0096] In addition, if the indoor temperature is greater than the first critical temperature (TS+DT1+DT2) within the temperature limit range after the fan coil unit has been running at the first gear for a period of time (for example but not limited to 3 minutes), the current wind speed can be increased from the first gear to the third gear.

[0097] Please refer to Figure 6 and Figure 9. In cooling mode, if the target gear is the first gear, the corresponding wind speed gear adjustment strategy is:

[0098] After the fan coil unit has been running at the first gear for a period of time (for example but not limited to 3 minutes), the fourth detected temperature can be obtained (that is, the indoor temperature collected after the fan coil unit has been running at the first gear for a period of time), and the fourth detected temperature can be compared with the limit temperature range to obtain a fourth temperature comparison result; if the fourth temperature comparison result is that the fourth detected temperature is lower than the set temperature in the limit temperature range, the current wind speed gear is reduced from the first gear to the second gear.

[0099] After the fan coil unit has been running at the second gear for a period of time (for example but not limited to 3 minutes), the fifth detected temperature can be obtained (that is, the indoor temperature collected after the fan coil unit has been running at the second gear for a period of time), and the fifth detected temperature can be compared with the limit temperature range to obtain a fifth temperature comparison result; if the fifth temperature comparison result is that the fifth detected temperature is lower than the second critical temperature in the limit temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear.

[0100] In addition, after the fan coil unit runs at the first gear for a period of time (for example but not limited to 3 minutes), if the previous wind speed gear is the second gear and the indoor temperature is greater than the fourth critical temperature (TS+DT1+DT2+DT3) within the temperature limit range, the current wind speed gear can be increased from the first gear to the third gear.

[0101] After the fan coil unit runs at the first gear for a period of time (for example but not limited to 3 minutes), if the previous wind speed gear is not the second gear and the indoor temperature is greater than the first critical temperature (TS+DT1+DT2) within the temperature limit range, the current wind speed gear can be increased from the first gear to the third gear.

[0102] In addition, after the fan coil unit runs at the second gear for a period of time (for example but not limited to 3 minutes), if the indoor temperature is greater than the first critical temperature (TS+DT1+DT2) within the temperature limit range, the current wind speed can be increased from the second gear to the first gear.

[0103] Please refer to Figures 7 and 10. In heating mode, if the target gear is the third gear, the corresponding wind speed gear adjustment strategy is:

[0104] After the fan coil unit has been running at the third gear for a period of time (for example but not limited to 3 minutes), the sixth detected temperature can be obtained (that is, the indoor temperature collected after the fan coil unit has been running at the third gear for a period of time), and the sixth detected temperature is compared with the limit temperature range to obtain a sixth temperature comparison result; if the sixth temperature comparison result is that the sixth detected temperature is greater than the set temperature in the limit temperature range, the current wind speed gear is reduced from the third gear to the first gear.

[0105] After the fan coil unit has been running at the first gear for a period of time (for example but not limited to 3 minutes), the seventh detection temperature can be obtained (that is, the indoor temperature collected after the fan coil unit has been running at the first gear for a period of time), and the seventh detection temperature can be compared with the limit temperature range to obtain the seventh temperature comparison result; if the seventh temperature comparison result is that the seventh detection temperature is greater than the sixth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the first gear to the shutdown gear.

[0106] In addition, if the indoor temperature is lower than the fifth critical temperature (TS-DT1-DT2) within the temperature limit range after the fan coil unit has been running at the first gear for a period of time (for example, but not limited to 3 minutes), the current wind speed can be increased from the first gear to the third gear.

[0107] Please refer to Figures 7 and 11. In heating mode, if the target gear is the first gear, the corresponding wind speed gear adjustment strategy is:

[0108] After the fan coil unit has been running at the first gear for a period of time (for example but not limited to 3 minutes), the eighth detection temperature can be obtained (that is, the indoor temperature collected after the fan coil unit has been running at the first gear for a period of time), and the eighth detection temperature can be compared with the limit temperature range to obtain the eighth temperature comparison result; if the eighth temperature comparison result is that the eighth detection temperature is greater than the set temperature in the limit temperature range, the current wind speed gear is reduced from the first gear to the second gear.

[0109] After the fan coil unit has been running at the second gear for a period of time (for example but not limited to 3 minutes), the ninth detection temperature can be obtained (that is, the indoor temperature collected after the fan coil unit has been running at the second gear for a period of time), and the ninth detection temperature is compared with the limit temperature range to obtain a ninth temperature comparison result; if the ninth temperature comparison result is that the ninth detection temperature is greater than the sixth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear.

[0110] In addition, after the fan coil unit runs at the first gear for a period of time (for example but not limited to 3 minutes), if the previous wind speed gear is the third gear and the indoor temperature is lower than the eighth critical temperature (TS-DT1-DT2-DT3) within the temperature limit range, the current wind speed gear can be increased from the first gear to the third gear.

[0111] After the fan coil unit runs at the first gear for a period of time (for example but not limited to 3 minutes), if the previous wind speed gear is not the third gear and the indoor temperature is lower than the fifth critical temperature (TS-DT1-DT2) within the temperature limit range, the current wind speed gear can be increased from the first gear to the third gear.

[0112] In addition, after the fan coil unit runs at the second gear for a period of time (for example but not limited to 3 minutes), if the indoor temperature is lower than the fifth critical temperature (TS-DT1-DT2) within the temperature limit range, the current wind speed can be increased from the second gear to the first gear.

[0113] From the above wind speed gear adjustment strategy, it can be seen that in order to quickly adjust the indoor temperature, the current wind speed gear can be set as the target gear according to the detected indoor temperature when the machine is just turned on. The critical temperature of the target gear is different from the critical temperature after the machine is turned on. Specifically, in cooling mode, the critical temperature of the target gear is lower, which can quickly lower the indoor temperature; while in heating mode, the critical temperature of the target gear is higher, which can quickly increase the indoor temperature and shorten the temperature response time.

[0114] S504: Determine a wind speed level adjustment strategy based on historical wind speed levels.

[0115] Specifically, after adjusting the current wind speed level from the first level or the second level to the shutdown level (i.e., shutdown due to temperature increase), if it is detected that the indoor temperature meets the conditions for restarting, the wind speed level (first level or second level) before the shutdown due to temperature increase will be the historical wind speed level.

[0116] Specifically, S504 is consistent with S401 and will not be repeated here.

[0117] S505: Acquire the current detected temperature, compare the current detected temperature with the limit temperature range, and obtain a temperature comparison result.

[0118] Specifically, S505 is consistent with S402 and will not be repeated here.

[0119] S506: Adjust the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result.

[0120] Specifically, S506 is consistent with S403 and will not be repeated here.

[0121] S507: Control the fan coil unit using the adjusted wind speed level.

[0122] Specifically, S507 is consistent with S404 and will not be repeated here.

[0123] In an embodiment of the present application, in order to quickly adjust the indoor temperature, the current wind speed gear can be set as the target gear according to the detected indoor temperature when the machine is just turned on. The critical temperature of the target gear is different from the critical temperature after the machine is turned on. Specifically, in cooling mode, the critical temperature of the target gear is lower, which can quickly lower the indoor temperature; while in heating mode, the critical temperature of the target gear is higher, which can quickly raise the indoor temperature and shorten the temperature response time. In addition, by determining a wind speed gear adjustment strategy based on historical wind speed gears; obtaining the current detected temperature, comparing the current detected temperature with the limit temperature range, and obtaining a temperature comparison result; adjusting the current wind speed gear based on the wind speed gear adjustment strategy and the temperature comparison result, the current wind speed gear adjustment strategy can be determined based on the corresponding wind speed gear before the last shutdown. In this way, different wind speed gears can be automatically matched to the corresponding load size when the room temperature reaches the set value. On the one hand, it avoids frequent wind speed switching due to inappropriate wind speed gears, can improve temperature control accuracy, and make the fan coil unit operate with the minimum energy consumption as much as possible. On the other hand, it can improve the overall comfort level.

[0124] As previously mentioned, air conditioners can have multiple operating modes, i.e., fan coil unit operating modes. For example, cooling mode and heating mode. The following embodiments will describe different wind speed adjustment strategies for cooling mode and heating mode, respectively.

[0125] Specifically, when the fan coil unit operates in cooling mode, the limit temperature range may at least include: set temperature (TS), first critical temperature (TS+DT1+DT2), second critical temperature (TS-DT4), third critical temperature (TS+DT1), and fourth critical temperature (TS+DT1+DT2+DT3).

[0126] The above S403: adjusting the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result may specifically include the following situations:

[0127] Case 1: If the temperature comparison result shows that the current detected temperature is lower than the set temperature (TS) within the limit temperature range, the current fan speed level is reduced. In other words, in cooling mode, when the indoor temperature drops to the set temperature (TS), it means that the current fan speed level is sufficient to match the indoor load. To save energy, the current fan speed level can be reduced.

[0128] Case 2: If the temperature comparison result shows that the current detected temperature is greater than the first critical temperature (TS+DT1+DT2) within the limit temperature range, the current wind speed level is increased. The first critical temperature (TS+DT1+DT2) is greater than the set temperature (TS). In other words, in cooling mode, when the indoor temperature rises to the first critical temperature (TS+DT1+DT2), it indicates that the current wind speed level is insufficient to match the indoor load. To lower the indoor temperature and improve the comfort level of indoor users, the current wind speed level can be increased.

[0129] Case 3: If the temperature comparison result shows that the current detected temperature is lower than the second critical temperature (TS-DT4) within the limit temperature range, the current fan speed level is adjusted to the shutdown level. The second critical temperature (TS-DT4) is lower than the set temperature (TS). In other words, in cooling mode, when the indoor temperature drops to the second critical temperature (TS-DT4), it indicates that the current indoor temperature is low enough. To save energy, the current fan speed level can be adjusted to the shutdown level, i.e., the temperature is reached and the fan is shut down.

[0130] In some possible embodiments, after the temperature is reached and the unit is shut down, the current wind speed level can be updated to the historical wind speed level. For example, in the above-mentioned third situation, if the current wind speed level is the medium level, after the current wind speed level is adjusted to the shutdown level, the medium level can be used to update the historical wind speed level, that is, the updated historical wind speed level is the medium level. If the current wind speed level is the low level, after the current wind speed level is adjusted to the shutdown level, the low level can be used to update the historical wind speed level, that is, the updated historical wind speed level is the low level. After updating the historical wind speed level, if the indoor temperature rises again and reaches the third critical temperature (TS+DT1), the fan coil unit needs to be turned on again, and the shutdown level is adjusted to the updated historical wind speed level. That is, the wind speed level when the fan coil unit is turned on again remains the same as the wind speed level before the temperature is reached and the unit is shut down, so that the fan coil unit wind speed level can be automatically tracked and matched with the indoor load. The third critical temperature (TS+DT1) is greater than the set temperature (TS) and less than the first critical temperature (TS+DT1+DT2).

[0131] When the room temperature rises again and reaches the third critical temperature (TS+DT1), if the historical wind speed gear is the first gear, the medium wind gear adjustment strategy in the cooling mode is executed.

[0132] 12-13 exemplarily show a schematic diagram of the stroke adjustment strategy in the cooling mode.

[0133] As shown in Figures 12 and 13, if the current wind speed gear is medium wind gear, and the temperature comparison result is that the current detected temperature is less than the set temperature (TS) in the limit temperature range, the current wind speed gear is reduced from the first gear (medium wind gear) to the second gear (low wind gear). If the current wind speed gear is medium wind gear, and the temperature comparison result is that the current detected temperature is greater than or equal to the set temperature (TS) in the limit temperature range, the temperature comparison is continued, and it is determined whether the previous wind speed gear is the second gear (low wind gear). If the previous wind speed gear is the second gear (low wind gear), then when the temperature comparison result is that the current detected temperature is greater than the fourth critical temperature (TS+DT1+DT2+DT3), the current wind speed gear is increased from the first gear (medium wind gear) to the third gear (high wind gear). If the previous wind speed gear is not the second gear (low wind gear), then when the temperature comparison result shows that the current detected temperature is greater than the first critical temperature (TS+DT1+DT2), the current wind speed gear is increased from the first gear (medium wind gear) to the third gear (high wind gear). Otherwise, the current wind speed gear is maintained at the first gear (medium wind gear).

[0134] If the current wind speed gear is low and the temperature comparison result shows that the current detected temperature is less than the second critical temperature (TS-DT4), the current wind speed gear is adjusted from the second gear (low wind gear) to the shutdown gear, that is, the machine is shut down. If the temperature comparison result shows that the current detected temperature is greater than the first critical temperature (TS+DT1+DT2), the current wind speed gear is increased from the second gear (low wind gear) to the first gear (medium wind gear). Otherwise, the current wind speed gear is maintained at the second gear (low wind gear).

[0135] If the current wind speed gear is high and the temperature comparison result shows that the current detected temperature is lower than the set temperature (TS) within the limit temperature range, the current wind speed gear is reduced from the third gear (high) to the first gear (medium). Otherwise, the current wind speed gear is maintained at the third gear (high).

[0136] 14-15 exemplarily show schematic diagrams of low wind speed adjustment strategies in cooling mode.

[0137] As shown in Figures 14 and 15, if the current wind speed gear is medium and the temperature comparison result shows that the current detected temperature is less than the set temperature (TS), the current wind speed gear is reduced from the first gear (medium) to the second gear (low). If the temperature comparison result shows that the current detected temperature is greater than the fourth critical temperature (TS+DT1+DT2+DT3), the current wind speed gear is increased from the first gear (medium) to the third gear (high). Otherwise, the current wind speed gear is maintained at the first gear (medium).

[0138] If the current wind speed gear is low, and the temperature comparison result shows that the current detected temperature is less than the second critical temperature (TS-DT4), the current wind speed gear is adjusted from the second gear (low) to the shutdown gear, that is, the machine is shut down. If the temperature comparison result shows that the current detected temperature is greater than the first critical temperature (TS+DT1+DT2), the current wind speed gear is increased from the second gear (low) to the first gear (medium). Otherwise, the current wind speed gear is maintained at the second gear (low).

[0139] If the current wind speed gear is high and the temperature comparison result shows that the current detected temperature is lower than the set temperature (TS) within the limit temperature range, the current wind speed gear is reduced from the third gear (high) to the first gear (medium). Otherwise, the current wind speed gear is maintained at the third gear (high).

[0140] Specifically, when the fan coil unit is in heating mode, the limit temperature range may at least include: set temperature (TS), fifth critical temperature (TS-DT1-DT2), sixth critical temperature (TS+DT4), seventh critical temperature (TS-DT1), and eighth critical temperature (TS-DT1-DT2-DT3).

[0141] The above S403: adjusting the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result may specifically include the following situations:

[0142] Case 1: If the temperature comparison result shows that the current detected temperature is greater than the set temperature (TS) within the limit temperature range, the current fan speed level is reduced. In other words, in heating mode, when the indoor temperature rises to the set temperature (TS), it means that the current fan speed level is sufficient to match the indoor load. To save energy, the current fan speed level can be reduced.

[0143] Case 2: If the temperature comparison result shows that the current detected temperature is less than the fifth critical temperature (TS-DT1-DT2) in the limit temperature range, the current wind speed level is increased. The fifth critical temperature (TS-DT1-DT2) is less than the set temperature (TS). That is, in heating mode, when the indoor temperature drops to the fifth critical temperature (TS-DT1-DT2), it indicates that the current wind speed level is insufficient to match the indoor load. To increase the indoor temperature and improve the comfort level of indoor users, the current wind speed level can be increased.

[0144] Case 3: If the temperature comparison result shows that the current detected temperature is greater than the sixth critical temperature (TS+DT4) within the limit temperature range, the current fan speed level is adjusted to the shutdown level. The sixth critical temperature (TS+DT4) is greater than the set temperature (TS). In other words, in heating mode, when the indoor temperature rises to the sixth critical temperature (TS+DT4), it indicates that the current indoor temperature is high enough. To save energy, the current fan speed level can be adjusted to the shutdown level, i.e., the temperature-reaching shutdown mode.

[0145] In some possible embodiments, after the temperature is reached and the unit is shut down, the current wind speed level can be updated to the historical wind speed level. For example, in the above-mentioned case three, if the current wind speed level is medium, after the current wind speed level is adjusted to the shutdown level, the historical wind speed level can be updated with medium, that is, the updated historical wind speed level is medium. If the current wind speed level is low, after the current wind speed level is adjusted to the shutdown level, the historical wind speed level can be updated with low, that is, the updated historical wind speed level is low. After updating the historical wind speed level, if the indoor temperature drops again and drops to the seventh critical temperature (TS-DT1), the fan coil unit needs to be turned on again, and the shutdown level is adjusted to the updated historical wind speed level. That is, the wind speed level when the fan coil unit is turned on again remains the same as the wind speed level before the temperature is reached and the unit is shut down, so that the fan coil unit wind speed level can be automatically tracked and matched with the indoor load. The seventh critical temperature (TS-DT1) is lower than the set temperature (TS) and higher than the first critical temperature (TS-DT1-DT2).

[0146] 16-17 exemplarily show a schematic diagram of the medium-speed adjustment strategy in the heating mode.

[0147] As shown in Figures 16 and 17, if the current wind speed gear is medium wind gear, and the temperature comparison result is that the current detection temperature is greater than the set temperature (TS) in the limit temperature range, the current wind speed gear is reduced from the first gear (medium wind gear) to the second gear (low wind gear). If the current wind speed gear is medium wind gear, and the temperature comparison result is that the current detection temperature is less than or equal to the set temperature (TS) in the limit temperature range, the temperature comparison is continued, and it is determined whether the previous wind speed gear is the second gear (low wind gear). If the previous wind speed gear is the second gear (low wind gear), then when the temperature comparison result is that the current detection temperature is less than the eighth critical temperature (TS-DT1-DT2-DT3), the current wind speed gear is increased from the first gear (medium wind gear) to the third gear (high wind gear). If the previous wind speed level is not the second level (low wind level), then if the temperature comparison result shows that the current detected temperature is less than the fifth critical temperature (TS-DT1-DT2), the current wind speed level will be increased from the first level (medium wind level) to the third level (high wind level). Otherwise, the current wind speed level will be maintained at the first level (medium wind level).

[0148] If the current wind speed gear is low, and the temperature comparison result shows that the current detected temperature is greater than the sixth critical temperature (TS+DT4), the current wind speed gear is adjusted from the second gear (low) to the shutdown gear, that is, the machine is shut down. If the temperature comparison result shows that the current detected temperature is less than the fifth critical temperature (TS-DT1-DT2), the current wind speed gear is increased from the second gear (low) to the first gear (medium). Otherwise, the current wind speed gear is maintained at the second gear (low).

[0149] If the current wind speed gear is high and the temperature comparison result shows that the current detected temperature is greater than the set temperature (TS) within the limit temperature range, the current wind speed gear is reduced from the third gear (high) to the first gear (medium). Otherwise, the current wind speed gear is maintained at the third gear (high).

[0150] 18-19 exemplarily show schematic diagrams of low wind speed adjustment strategies in cooling mode.

[0151] As shown in Figures 18 and 19, if the current wind speed gear is medium and the temperature comparison result shows that the current detected temperature is greater than the set temperature (TS), the current wind speed gear is reduced from the first gear (medium) to the second gear (low). If the temperature comparison result shows that the current detected temperature is less than the eighth critical temperature (TS-DT1-DT2-DT3), the current wind speed gear is increased from the first gear (medium) to the third gear (high). Otherwise, the current wind speed gear is maintained at the first gear (medium).

[0152] If the current wind speed gear is low, and the temperature comparison result shows that the current detected temperature is greater than the sixth critical temperature (TS+DT4), the current wind speed gear is adjusted from the second gear (low) to the shutdown gear, that is, the machine is shut down. If the temperature comparison result shows that the current detected temperature is less than the fifth critical temperature (TS-DT1-DT2), the current wind speed gear is increased from the second gear (low) to the first gear (medium). Otherwise, the current wind speed gear is maintained at the second gear (low).

[0153] If the current wind speed gear is high and the temperature comparison result shows that the current detected temperature is greater than the set temperature (TS) within the limit temperature range, the current wind speed gear is reduced from the third gear (high) to the first gear (medium). Otherwise, the current wind speed gear is maintained at the third gear (high).

[0154] FIG20 exemplifies a schematic diagram of the overall wind speed gear adjustment strategy of the fan coil unit in cooling mode. As shown in FIG20 , after the unit is turned on, the current indoor temperature can be detected. If the current indoor temperature exceeds the set temperature TS, the unit will operate at the high wind gear and execute the wind speed gear adjustment strategy corresponding to the high wind gear (FIG. 8). When the indoor temperature is lower than the second critical temperature (TS-DT4), the unit will switch from the medium wind gear to the shutdown state. If the current indoor temperature exceeds the second critical temperature but does not exceed the set temperature, the unit will operate at the medium wind gear and execute the wind speed gear adjustment strategy corresponding to the medium wind gear (FIG. 9). When the indoor temperature is lower than the second critical temperature (TS-DT4), the unit will switch from the low wind gear to the shutdown state. If the current indoor temperature does not exceed the second critical temperature, the fan will not be turned on.

[0155] After the temperature is reached and the machine is shut down, when the indoor temperature rises again and exceeds the third critical temperature (TS+DT1), the machine will start running again at the wind speed level before the temperature is reached and the corresponding wind speed level adjustment strategy will be executed. If the wind speed level before the temperature is reached and the machine is shut down is medium, the wind speed level adjustment strategy corresponding to the medium level will be executed after the temperature is reached and the machine is restarted (Figure 12-Figure 13). If the wind speed level before the temperature is reached and the machine is shut down is low, the wind speed level adjustment strategy corresponding to the low level will be executed after the temperature is reached and the machine is restarted (Figure 14-Figure 15).

[0156] Figure 21 illustrates an exemplary schematic diagram of the overall wind speed adjustment strategy for a fan coil unit in heating mode. As shown in Figure 21, after powering on, the current indoor temperature can be detected. If the current indoor temperature is lower than the set temperature, the unit will operate at high speed and execute the corresponding wind speed adjustment strategy (Figure 10). When the indoor temperature is higher than the sixth critical temperature (TS+DT4), the unit will switch from medium speed to shutdown. If the current indoor temperature is not higher than the sixth critical temperature but not lower than the set temperature, the unit will operate at medium speed and execute the corresponding wind speed adjustment strategy (Figure 11). When the indoor temperature is higher than the sixth critical temperature (TS+DT4), the unit will switch from low speed to shutdown. If the current indoor temperature exceeds the sixth critical temperature, the fan will not turn on.

[0157] After reaching the temperature and shutting down, when the indoor temperature drops again and falls below the seventh critical temperature (TS-DT1), the fan will start running again at the fan speed level before reaching the temperature and shutting down, and the corresponding fan speed level adjustment strategy will be executed. If the fan speed level before reaching the temperature and shutting down was medium, the fan speed level adjustment strategy corresponding to the medium level will be executed after reaching the temperature and shutting down and restarting (Figures 16-17). If the fan speed level before reaching the temperature and shutting down was low, the fan speed level adjustment strategy corresponding to the low level will be executed after reaching the temperature and shutting down and restarting (Figures 18-19).

[0158] In an embodiment of the present application, in order to quickly adjust the indoor temperature, the current wind speed gear can be set as the target gear according to the detected indoor temperature when the machine is just turned on. The critical temperature of the target gear is different from the critical temperature after the machine is turned on. Specifically, in cooling mode, the critical temperature of the target gear is lower, which can quickly lower the indoor temperature; while in heating mode, the critical temperature of the target gear is higher, which can quickly raise the indoor temperature and shorten the temperature response time. In addition, by determining a wind speed gear adjustment strategy based on historical wind speed gears; obtaining the current detected temperature, comparing the current detected temperature with the limit temperature range, and obtaining a temperature comparison result; adjusting the current wind speed gear based on the wind speed gear adjustment strategy and the temperature comparison result, the current wind speed gear adjustment strategy can be determined based on the corresponding wind speed gear before the last shutdown. In this way, different wind speed gears can be automatically matched to the corresponding load size when the room temperature reaches the set value. On the one hand, it avoids frequent wind speed switching due to inappropriate wind speed gears, can improve temperature control accuracy, and make the fan coil unit operate with the minimum energy consumption as much as possible. On the other hand, it can improve the overall comfort level.

[0159] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0160] The fan coil unit wind speed control method can be set up in different deployment modes. Specifically, the fan coil unit will be placed in different rooms as the terminal equipment. Different rooms have different requirements for cooling (or heating) temperature. In order to enable the temperature of each room to be controlled individually, the fan coil unit wind speed control method can be embedded in the edge controller of the fan coil unit in each room. The edge controller adjusts the gear of the fan coil unit in the corresponding room in time according to the changes in the indoor temperature, so as to make timely adjustments to the indoor temperature and improve the user's comfort level.

[0161] The fan coil unit wind speed control method can also be deployed on a local host computer. The operating data of the fan coil unit corresponding to each room is reported to the centralized controller by the temperature regulator in wireless or wired form. The centralized controller transmits the data to the local host computer, and the local host computer saves the data. The fan coil unit wind speed control method deployed on the local host computer adjusts the gear of the fan coil unit corresponding to each room by reading the data. The gear adjustment strategy of each fan coil unit is issued to the temperature regulator of the corresponding fan coil unit through the centralized controller to achieve timely adjustment of the wind speed gear in the fan coil unit, and timely adjustment of the indoor temperature to improve the user's comfort level.

[0162] The fan coil unit wind speed control method can also be deployed on a cloud server. Each fan coil unit corresponding to a room is connected to a corresponding wireless thermostat. The wireless thermostat transmits the fan coil unit's real-time operating data and parameters to a gateway via wireless transmission (the wireless transmission method can include Bluetooth communication links, Wi-Fi, communication links, or microwave communication, etc.). The gateway uploads the real-time operating data and parameters of all fan coil units (including all fan coil units corresponding to each room) to the cloud server, which stores the real-time operating data and parameters.

[0163] The fan coil unit wind speed control method is deployed on a cloud server. The temperature regulator associated with each fan coil unit accesses cloud server data in real time. The cloud server outputs gear adjustment instructions, which are then transmitted to the gateway. The gateway then transmits these instructions to the corresponding fan coil unit's wireless temperature regulator, enabling timely adjustment of the fan coil unit's operating gear and improving user comfort.

[0164] Please refer to FIG. 22 , which is a schematic diagram of the structure of a fan coil unit wind speed control device provided in an embodiment of the present application. As shown in FIG. 22 , the fan coil unit wind speed control device 220 includes:

[0165] The determination module 2210 is configured to determine a wind speed level adjustment strategy based on historical wind speed levels; wherein the historical wind speed level refers to the wind speed level corresponding to the fan coil unit before the fan coil unit was most recently shut down;

[0166] Comparison module 2220, configured to obtain a current detected temperature, compare the current detected temperature with a limit temperature range, and obtain a temperature comparison result;

[0167] An adjustment module 2230 is configured to adjust the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result;

[0168] The control module 2240 is used to control the fan coil unit using the adjusted wind speed level.

[0169] In some embodiments, the fan coil unit operates in a cooling mode;

[0170] The adjustment module 2230 includes:

[0171] A first adjustment unit is configured to reduce the current wind speed level if the temperature comparison result shows that the current detected temperature is lower than the set temperature within the limit temperature range;

[0172] A second adjustment unit is configured to increase the current wind speed level if the temperature comparison result shows that the current detected temperature is greater than a first critical temperature in the limit temperature range; the first critical temperature is greater than the set temperature;

[0173] The third adjustment unit is configured to adjust the current wind speed gear to a shutdown gear if the temperature comparison result shows that the current detected temperature is lower than a second critical temperature in the limit temperature range.

[0174] In some embodiments, the fan coil unit wind speed control device 220 further includes:

[0175] A first updating module, configured to update the historical wind speed level using the current wind speed level;

[0176] The adjustment module 2230 is also used to: if the temperature comparison result is that the current detected temperature is greater than the third critical temperature, adjust the shutdown gear to the updated historical wind speed gear, and the third critical temperature is greater than the set temperature and less than the first critical temperature.

[0177] In some embodiments, the first adjustment unit is specifically configured to: if the temperature comparison result shows that the current detected temperature is lower than the set temperature in the limit temperature range, reduce the current wind speed gear from the first gear to the second gear, or reduce the current wind speed gear from the third gear to the first gear;

[0178] The second adjustment unit is specifically configured to: if the temperature comparison result shows that the current detected temperature is greater than a first critical temperature in the limit temperature range, increase the current wind speed gear from the second gear to the first gear;

[0179] The third adjustment unit is specifically used to: if the temperature comparison result is that the current detected temperature is lower than the second critical temperature in the limit temperature range, adjust the current wind speed gear from the second gear to the shutdown gear; the shutdown gear is lower than the second gear.

[0180] In some embodiments, the historical wind speed gear is the first gear; the adjustment module 2230 further includes:

[0181] The fourth adjustment unit is used to adjust the current wind speed gear from the first gear to the third gear if the current wind speed gear is the first gear and the previous wind speed gear is the second gear, and the temperature comparison result is that the current detected temperature is greater than the fourth critical temperature in the limit temperature range; the fourth critical temperature is greater than the first critical temperature.

[0182] In some embodiments, the historical wind speed gear is the first gear;

[0183] The second adjustment unit is specifically used to: if the current wind speed gear is the first gear, and the temperature comparison result is that the current detected temperature is greater than the first critical temperature in the limit temperature range, then increase the current wind speed gear from the first gear to the third gear.

[0184] In some embodiments, the historical wind speed level is the second level; the adjustment module 2230 further includes:

[0185] The fifth adjustment unit is used to adjust the current wind speed gear from the first gear to the third gear if the temperature comparison result is that the current detected temperature is greater than the fourth critical temperature in the limit temperature range; the fourth critical temperature is greater than the first critical temperature.

[0186] In some embodiments, the fan coil unit operates in a heating mode;

[0187] The adjustment module 2230 includes:

[0188] a sixth adjusting unit, configured to reduce the current wind speed level if the temperature comparison result shows that the current detected temperature is greater than the set temperature in the limit temperature range;

[0189] a seventh adjustment unit, configured to increase the current wind speed level if the temperature comparison result shows that the current detected temperature is lower than a fifth critical temperature in the limit temperature range; the fifth critical temperature is lower than the set temperature;

[0190] The eighth adjustment unit is used to adjust the current wind speed gear to the shutdown gear if the temperature comparison result is that the current detected temperature is greater than the sixth critical temperature in the limit temperature range; the sixth critical temperature is greater than the set temperature.

[0191] In some embodiments, the fan coil unit wind speed control device 220 further includes:

[0192] A second updating module is configured to update the historical wind speed level using the current wind speed level;

[0193] The adjustment module 2230 is also used to: if the temperature comparison result is that the current detected temperature is lower than the seventh critical temperature, adjust the shutdown gear to the updated historical wind speed gear, and the seventh critical temperature is lower than the set temperature and higher than the fifth critical temperature.

[0194] In some embodiments, the sixth adjustment unit is specifically configured to: if the temperature comparison result shows that the current detected temperature is greater than the set temperature in the limit temperature range, reduce the current wind speed gear from the first gear to the second gear, or reduce the current wind speed gear from the third gear to the first gear;

[0195] a seventh adjusting unit, specifically configured to: if the temperature comparison result shows that the current detected temperature is lower than the fifth critical temperature in the limit temperature range, increase the current wind speed gear from the second gear to the first gear;

[0196] The eighth adjustment unit is specifically used to: if the temperature comparison result is that the current detected temperature is greater than the sixth critical temperature in the limit temperature range, adjust the current wind speed gear from the second gear to the shutdown gear; the shutdown gear is lower than the second gear.

[0197] In some embodiments, the historical wind speed gear is the first gear; the adjustment module 2230 further includes:

[0198] The ninth adjustment unit is used to adjust the current wind speed gear from the first gear to the third gear if the current wind speed gear is the first gear and the previous wind speed gear is the second gear, and the temperature comparison result is that the current detected temperature is lower than the eighth critical temperature in the limit temperature range; the eighth critical temperature is lower than the fifth critical temperature.

[0199] In some embodiments, the historical wind speed gear is the first gear;

[0200] The seventh adjustment unit is specifically used to: if the current wind speed gear is the first gear, and the temperature comparison result is that the current detected temperature is lower than the fifth critical temperature in the limit temperature range, then increase the current wind speed gear from the first gear to the third gear.

[0201] In some embodiments, the historical wind speed level is the second level; the adjustment module 2230 further includes:

[0202] The tenth adjustment unit is used to adjust the current wind speed gear from the first gear to the third gear if the temperature comparison result is that the current detected temperature is greater than the eighth critical temperature in the limit temperature range; the eighth critical temperature is lower than the fifth critical temperature.

[0203] In some embodiments, the fan coil unit wind speed control device 220 further includes:

[0204] The comparison module 2220 is further configured to obtain a first detected temperature in response to a power-on instruction, and compare the first detected temperature with a limit temperature range to obtain a first temperature comparison result;

[0205] a setting module, configured to set the wind speed gear to a target gear according to the first temperature comparison result;

[0206] The downshift module is used to reduce the wind speed gear to the shutdown gear by adopting a wind speed gear adjustment strategy corresponding to the target gear.

[0207] In some embodiments, the fan coil unit operates in a cooling mode;

[0208] Setting module, specifically used for:

[0209] If the first temperature comparison result shows that the first detected temperature is greater than the set temperature, the wind speed gear is set to the third gear, and the third gear is the target gear;

[0210] If the first temperature comparison result is that the first detected temperature is less than or equal to the set temperature and greater than the second critical temperature, the wind speed gear is set to the first gear, and the first gear is the target gear.

[0211] In some embodiments, the third gear is the target gear;

[0212] Downshift module, specifically used for:

[0213] Acquire a second detected temperature, compare the second detected temperature with a limit temperature range, and obtain a second temperature comparison result;

[0214] If the second temperature comparison result is that the second detected temperature is lower than the set temperature in the limit temperature range, reducing the current wind speed gear from the third gear to the first gear;

[0215] Acquire a third detected temperature, compare the third detected temperature with the limit temperature range, and obtain a third temperature comparison result;

[0216] If the third temperature comparison result is that the third detected temperature is lower than the second critical temperature in the restricted temperature range, the current wind speed gear is adjusted from the first gear to the shutdown gear.

[0217] In some embodiments, the first gear is the target gear;

[0218] Downshift module, specifically used for:

[0219] Acquiring a fourth detected temperature, and comparing the fourth detected temperature with a limit temperature range to obtain a fourth temperature comparison result;

[0220] If the fourth temperature comparison result is that the fourth detected temperature is lower than the set temperature in the limit temperature range, reducing the current wind speed gear from the first gear to the second gear;

[0221] Acquiring a fifth detected temperature, and comparing the fifth detected temperature with a limit temperature range to obtain a fifth temperature comparison result;

[0222] If the fifth temperature comparison result is that the fifth detected temperature is lower than the second critical temperature in the restricted temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear.

[0223] In some embodiments, the fan coil unit operates in a heating mode;

[0224] Setting module, specifically used for:

[0225] If the first temperature comparison result shows that the first detected temperature is lower than the set temperature, the wind speed gear is set to the third gear, and the third gear is the target gear;

[0226] If the first temperature comparison result is that the first detected temperature is greater than or equal to the set temperature and less than the sixth critical temperature, the wind speed gear is set to the first gear, and the first gear is the target gear.

[0227] In some embodiments, the third gear is the target gear;

[0228] Downshift module, specifically used for:

[0229] Acquiring a sixth detected temperature, and comparing the sixth detected temperature with a limit temperature range to obtain a sixth temperature comparison result;

[0230] If the sixth temperature comparison result is that the sixth detected temperature is greater than the set temperature in the limit temperature range, reducing the current wind speed gear from the third gear to the first gear;

[0231] Acquiring a seventh detected temperature, and comparing the seventh detected temperature with a limit temperature range to obtain a seventh temperature comparison result;

[0232] If the seventh temperature comparison result is that the seventh detected temperature is greater than the sixth critical temperature in the limited temperature range, the current wind speed gear is adjusted from the first gear to the shutdown gear.

[0233] In some embodiments, the first gear is the target gear;

[0234] Downshift module, specifically used for:

[0235] Acquiring an eighth detected temperature, and comparing the eighth detected temperature with a limit temperature range to obtain an eighth temperature comparison result;

[0236] If the eighth temperature comparison result is that the eighth detected temperature is greater than the set temperature in the limit temperature range, reducing the current wind speed gear from the first gear to the second gear;

[0237] Acquiring a ninth detected temperature, and comparing the ninth detected temperature with a limit temperature range to obtain a ninth temperature comparison result;

[0238] If the ninth temperature comparison result is that the ninth detected temperature is greater than the sixth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear.

[0239] The fan coil unit wind speed control device provided in this application is used to implement the fan coil unit wind speed control method. The implementation solution provided by the fan coil unit wind speed control device is similar to the implementation solution recorded in the above method. Therefore, the specific limitations in the embodiments corresponding to the fan coil unit wind speed control device can be found in the above limitations on the fan coil unit wind speed control method, and will not be repeated here.

[0240] Each module in the fan coil unit speed control device can be implemented in whole or in part through software, hardware, or a combination thereof. Each of these modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a computer device memory in software form, allowing the processor to call and execute the corresponding operations of each module.

[0241] An embodiment of the present application further provides a computer program product, which includes: computer program code, which, when executed on a computer, enables the computer to execute a fan coil wind speed control method according to the above embodiment.

[0242] An embodiment of the present application further provides a computer-readable storage medium, which stores computer program code. When the computer program is executed, a fan coil unit wind speed control method in the above embodiment is implemented.

[0243] Figure 23 is a structural schematic diagram of an air conditioner provided in an embodiment of the present application.

[0244] Exemplarily, as shown in FIG23 , the air conditioner 2300 includes: a memory 2310 and a processor 2320 , wherein the memory 2310 stores an executable program code 2311 , and the processor 2320 is used to call and execute the executable program code 2311 to perform the fan coil wind speed control method.

[0245] In this embodiment, the air conditioner can be divided into functional modules based on the above-described method example. For example, each functional module can be mapped to a specific function, or two or more functions can be integrated into a single processing module. The integrated module can be implemented in hardware. It should be noted that the module division in this embodiment is illustrative and represents only a logical functional division. In actual implementation, other division methods may be used.

[0246] In the case of dividing the functional modules into corresponding functional modules, the air conditioner may include: a determination module, a comparison module, an adjustment module, and a control module. It should be noted that all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0247] The air conditioner provided in this embodiment is used to execute the above-mentioned fan coil unit wind speed control method, and thus can achieve the same effect as the above-mentioned implementation method.

[0248] In the case of an integrated unit, the air conditioner may include a processing module and a storage module. The processing module may be used to control and manage the operation of the air conditioner, and the storage module may be used to support the air conditioner in executing mutual program codes and data.

[0249] The processing module may be a processor or controller that implements or executes various exemplary logic blocks, modules, and circuits disclosed herein. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processing (DSP) and a microprocessor, and the storage module may be a memory.

[0250] In addition, the air conditioner provided in the embodiment of the present application can specifically be a chip, component or module, and the air conditioner may include a connected processor and memory; wherein the memory is used to store instructions, and when the air conditioner is running, the processor can call and execute the instructions to enable the chip to execute a sound source prompt method in the above embodiment.

[0251] Among them, the air conditioner, computer-readable storage medium, computer program product or chip provided in this embodiment are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0252] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0253] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0254] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A fan coil wind speed control method, characterized in that: The method comprises: Determine a wind speed gear adjustment strategy based on historical wind speed gears; wherein the historical wind speed gear refers to the wind speed gear corresponding to the fan coil unit before the most recent shutdown; Obtaining the current detected temperature, comparing the current detected temperature with the limit temperature range, and obtaining a temperature comparison result; Based on the wind speed level adjustment strategy and using the temperature comparison result, adjusting the current wind speed level; The fan coil unit is controlled using the adjusted wind speed gear.

2. The method according to claim 1, characterized in that The working mode of the fan coil unit is cooling mode; The adjusting the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result includes: If the temperature comparison result is that the current detected temperature is lower than the set temperature in the limit temperature range, then the current wind speed level is reduced; If the temperature comparison result is that the current detected temperature is greater than the first critical temperature in the limit temperature range, then the current wind speed gear is increased; the first critical temperature is greater than the set temperature; If the temperature comparison result is that the current detected temperature is lower than the second critical temperature in the limit temperature range, the current wind speed gear is adjusted to the shutdown gear; the second critical temperature is lower than the set temperature.

3. The method according to claim 2, characterized in that After adjusting the current wind speed gear to the shutdown gear, the method further includes: Using the current wind speed level to update the historical wind speed level; If the temperature comparison result is that the current detected temperature is greater than the third critical temperature, the shutdown gear is adjusted to the updated historical wind speed gear, and the third critical temperature is greater than the set temperature and less than the first critical temperature.

4. The method according to claim 2 or 3, characterized in that: If the temperature comparison result is that the current detected temperature is lower than the set temperature in the limit temperature range, then lowering the current wind speed level includes: If the temperature comparison result is that the current detected temperature is lower than the set temperature in the limit temperature range, the current wind speed gear is reduced from the first gear to the second gear, or the current wind speed gear is reduced from the third gear to the first gear; If the temperature comparison result is that the current detected temperature is greater than the first critical temperature in the limit temperature range, increasing the current wind speed level includes: If the temperature comparison result is that the current detected temperature is greater than the first critical temperature in the limit temperature range, the current wind speed gear is increased from the second gear to the first gear; If the temperature comparison result is that the current detected temperature is less than the second critical temperature in the limit temperature range, the current wind speed gear is adjusted to the shutdown wind speed gear, including: If the temperature comparison result is that the current detected temperature is lower than the second critical temperature in the limit temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear; the shutdown gear is lower than the second gear.

5. The method according to claim 4, characterized in that The historical wind speed gear is the first gear; the method further includes: If the current wind speed gear is the first gear, and the previous wind speed gear is the second gear, and the temperature comparison result is that the current detected temperature is greater than the fourth critical temperature in the limit temperature range, then the current wind speed gear is adjusted from the first gear to the third gear; the fourth critical temperature is greater than the first critical temperature.

6. The method according to claim 4, characterized in that The historical wind speed gear is the first gear; If the temperature comparison result is that the current detected temperature is greater than the first critical temperature in the limit temperature range, increasing the current wind speed level includes: If the current wind speed gear is the first gear, and the temperature comparison result is that the current detected temperature is greater than the first critical temperature in the limit temperature range, the current wind speed gear is increased from the first gear to the third gear.

7. The method according to claim 4, characterized in that The historical wind speed gear is the second gear; the method further includes: If the temperature comparison result is that the current detected temperature is greater than the fourth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the first gear to the third gear; the fourth critical temperature is greater than the first critical temperature.

8. The method according to claim 1, characterized in that The working mode of the fan coil unit is heating mode; The adjusting the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result includes: If the temperature comparison result is that the current detected temperature is greater than the set temperature in the limit temperature range, then the current wind speed level is reduced; If the temperature comparison result is that the current detected temperature is lower than the fifth critical temperature in the limit temperature range, then the current wind speed gear is increased; the fifth critical temperature is lower than the set temperature; If the temperature comparison result is that the current detected temperature is greater than the sixth critical temperature in the limit temperature range, the current wind speed gear is adjusted to the shutdown gear; the sixth critical temperature is greater than the set temperature.

9. The method according to claim 8, characterized in that After adjusting the current wind speed gear to the shutdown gear, the method further includes: Using the current wind speed level to update the historical wind speed level; If the temperature comparison result is that the current detected temperature is less than the seventh critical temperature, the shutdown gear is adjusted to the updated historical wind speed gear, and the seventh critical temperature is less than the set temperature and greater than the fifth critical temperature.

10. The method according to claim 8 or 9, characterized in that: If the temperature comparison result is that the current detected temperature is greater than the set temperature in the limit temperature range, then reducing the current wind speed level includes: If the temperature comparison result is that the current detected temperature is greater than the set temperature in the limit temperature range, the current wind speed gear is reduced from the first gear to the second gear, or the current wind speed gear is reduced from the third gear to the first gear; If the temperature comparison result is that the current detected temperature is less than the fifth critical temperature in the limit temperature range, increasing the current wind speed level includes: If the temperature comparison result is that the current detected temperature is lower than the fifth critical temperature in the limit temperature range, the current wind speed gear is increased from the second gear to the first gear; If the temperature comparison result is that the current detected temperature is greater than the sixth critical temperature in the limit temperature range, adjusting the current wind speed gear to the shutdown gear includes: If the temperature comparison result is that the current detected temperature is greater than the sixth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear; the shutdown gear is lower than the second gear.

11. The method according to claim 10, characterized in that The historical wind speed gear is the first gear; the method further includes: If the current wind speed gear is the first gear, and the previous wind speed gear is the second gear, and the temperature comparison result is that the current detected temperature is lower than the eighth critical temperature in the limit temperature range, then the current wind speed gear is increased from the first gear to the third gear; the eighth critical temperature is lower than the fifth critical temperature.

12. The method according to claim 10, characterized in that The historical wind speed gear is the first gear; If the temperature comparison result is that the current detected temperature is less than the fifth critical temperature in the limit temperature range, increasing the current wind speed level includes: If the current wind speed gear is the first gear, and the temperature comparison result is that the current detected temperature is less than the fifth critical temperature in the limit temperature range, the current wind speed gear is increased from the first gear to the third gear.

13. The method according to claim 10, characterized in that The historical wind speed gear is the second gear; the method further includes: If the temperature comparison result is that the current detected temperature is greater than the eighth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the first gear to the third gear; the eighth critical temperature is less than the fifth critical temperature.

14. The method according to claim 1, characterized in that Before determining the wind speed level adjustment strategy based on the historical wind speed levels, the method further includes: In response to a power-on instruction, obtaining a first detected temperature, comparing the first detected temperature with a limit temperature range, and obtaining a first temperature comparison result; According to the first temperature comparison result, setting the wind speed gear to the target gear; The wind speed gear is lowered to the shutdown gear by adopting a wind speed gear adjustment strategy corresponding to the target gear.

15. The method according to claim 14, characterized in that The working mode of the fan coil unit is cooling mode; The step of setting the wind speed gear as the target gear according to the first temperature comparison result includes: If the first temperature comparison result is that the first detected temperature is greater than the set temperature, the wind speed gear is set to the third gear, and the third gear is the target gear; If the first temperature comparison result is that the first detected temperature is less than or equal to the set temperature and greater than the second critical temperature, the wind speed gear is set to the first gear, and the first gear is the target gear.

16. The method according to claim 15, characterized in that The third gear is the target gear; The adopting of a wind speed gear adjustment strategy corresponding to the target gear to reduce the wind speed gear to a shutdown gear comprises: Acquire a second detected temperature, compare the second detected temperature with the limit temperature range, and obtain a second temperature comparison result; If the second temperature comparison result is that the second detected temperature is lower than the set temperature in the limit temperature range, reducing the current wind speed gear from the third gear to the first gear; Acquire a third detected temperature, compare the third detected temperature with the limit temperature range, and obtain a third temperature comparison result; If the third temperature comparison result is that the third detected temperature is lower than the second critical temperature in the limit temperature range, the current wind speed gear is adjusted from the first gear to the shutdown gear.

17. The method according to claim 15, characterized in that The first gear is the target gear; The adopting of a wind speed gear adjustment strategy corresponding to the target gear to reduce the wind speed gear to a shutdown gear comprises: Acquire a fourth detected temperature, compare the fourth detected temperature with the limit temperature range, and obtain a fourth temperature comparison result; If the fourth temperature comparison result is that the fourth detected temperature is lower than the set temperature in the limit temperature range, the current wind speed gear is reduced from the first gear to the second gear; Acquire a fifth detected temperature, compare the fifth detected temperature with the limit temperature range, and obtain a fifth temperature comparison result; If the fifth temperature comparison result is that the fifth detected temperature is lower than the second critical temperature in the limit temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear.

18. The method according to claim 14, characterized in that The working mode of the fan coil unit is heating mode; The step of setting the wind speed gear as the target gear according to the first temperature comparison result includes: If the first temperature comparison result is that the first detected temperature is less than the set temperature, the wind speed gear is set to the third gear, and the third gear is the target gear; If the first temperature comparison result is that the first detected temperature is greater than or equal to the set temperature and less than the sixth critical temperature, the wind speed gear is set to the first gear, and the first gear is the target gear.

19. The method according to claim 18, characterized in that The third gear is the target gear; The adopting of a wind speed gear adjustment strategy corresponding to the target gear to reduce the wind speed gear to a shutdown gear comprises: Acquire a sixth detected temperature, compare the sixth detected temperature with the limit temperature range, and obtain a sixth temperature comparison result; If the sixth temperature comparison result is that the sixth detected temperature is greater than the set temperature in the limit temperature range, the current wind speed gear is reduced from the third gear to the first gear; Acquire a seventh detected temperature, compare the seventh detected temperature with the limit temperature range, and obtain a seventh temperature comparison result; If the seventh temperature comparison result is that the seventh detected temperature is greater than the sixth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the first gear to the shutdown gear.

20. The method according to claim 18, characterized in that The first gear is the target gear; The adopting of a wind speed gear adjustment strategy corresponding to the target gear to reduce the wind speed gear to a shutdown gear comprises: Acquiring an eighth detected temperature, comparing the eighth detected temperature with the limit temperature range, and obtaining an eighth temperature comparison result; If the eighth temperature comparison result is that the eighth detected temperature is greater than the set temperature in the limit temperature range, the current wind speed gear is reduced from the first gear to the second gear; Acquire a ninth detected temperature, compare the ninth detected temperature with the limit temperature range, and obtain a ninth temperature comparison result; If the ninth temperature comparison result is that the ninth detected temperature is greater than the sixth critical temperature in the limit temperature range, the current wind speed gear is adjusted from the second gear to the shutdown gear.

21. A fan coil unit wind speed control device, characterized in that: The device comprises: A determination module, used to determine a wind speed gear adjustment strategy based on a historical wind speed gear; wherein the historical wind speed gear refers to the wind speed gear corresponding to the fan coil unit before the most recent shutdown; A comparison module is used to obtain the current detection temperature, compare the current detection temperature with the limit temperature range, and obtain a temperature comparison result; An adjustment module, configured to adjust the current wind speed level based on the wind speed level adjustment strategy and using the temperature comparison result; The control module is used to control the fan coil unit using the adjusted wind speed gear.

22. A computer storage medium, characterized in that The computer storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 20 is implemented.

23. An air conditioner, characterized in that: The air conditioner comprises: A memory for storing executable program codes; A processor, configured to call and run the executable program code from the memory, so that the air conditioner executes the method according to any one of claims 1 to 20.

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