A fan controller and fan-coil unit adaptive control system and method

Abstract

The application discloses a fan controller and a fan coil unit self-adaptive control system and method, wherein the fan controller comprises a parameter setting unit, a signal conversion unit, a calculation unit, a working state monitoring unit and a self-adaptive control unit. The parameter setting unit queries a pre-stored parameter table according to a fan coil unit model set by a code switch to retrieve working parameters. The signal conversion unit generates a gear signal in response to a temperature controller working gear setting. The calculation unit selects corresponding working parameters to calculate a target torque according to the gear signal. The working state monitoring unit detects current working state parameters of the fan. The self-adaptive control unit calculates adaptive working parameters according to the target torque, the working parameters and the current working state parameters, and obtains a target rotating speed. The fan driving control unit drives the fan to work according to the target rotating speed. Through the application, the intermediate rotating speed of the fan coil unit during operation can be controlled, and smooth transition can be realized, so that the effects of reducing noise and improving energy efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine control technology, and in particular to a wind turbine controller and an adaptive control system and method for wind turbine coil units. Background Technology

[0002] The national standard GB / T19232-2019 for fan coil units stipulates that permanent magnet synchronous motor units should be able to adjust the airflow, with three adjustable levels: high, medium, and low. In a fan coil unit system, the user adjusts the system level via a thermostat. The fan drive controller receives the level set by the thermostat and controls the airflow, cooling capacity, and heating capacity of the unit system by controlling the fan speed.

[0003] In existing technologies, the input power of the controller is used as a parameter to control the fan speed. However, this control scheme typically has the following two drawbacks:

[0004] First, the input power includes factors such as the circuit loss of the fan controller, and cannot directly reflect the size of the fan load.

[0005] Secondly, the lack of transition speed or unstable speed during the switching between ventilation and cooling modes can cause the fan to generate significant noise. Summary of the Invention

[0006] The purpose of this invention is to provide an adaptive control system and method for a fan controller and fan coil unit, so as to solve the problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: providing a fan controller, which establishes electrical connections with a thermostat and a fan respectively; the fan controller includes: a parameter setting unit, including: a DIP switch, the DIP switch being used to set the model of the fan coil unit in response to the operator's DIP operation; the parameter setting unit queries a pre-saved parameter form according to the fan coil unit model set by the DIP switch to determine and retrieve the working parameters corresponding to the fan coil unit model; wherein, the parameter form is used to record the fan coil unit model, static pressure type, and working mode parameters in association; the parameter form includes at least one fan coil unit model, i static pressure types configured for each fan coil unit, and x sets of working parameters in at least one working mode under m working positions configured for each static pressure type, where x is a natural number; signal conversion. The system comprises: a unit for generating a corresponding gear signal in response to the temperature controller setting the operating gear of the fan coil unit; a calculation unit for selecting corresponding operating parameters from the operating parameters retrieved by the parameter setting unit based on the gear signal generated by the signal conversion unit to calculate the target torque; an operating status monitoring unit for detecting the operating status parameters of the fan to determine the current speed and current output power of the fan coil unit; an adaptive control unit for performing calculations based on the target torque and operating parameters output by the calculation unit and the operating status parameters detected by the operating status monitoring unit to determine the corresponding adaptive operating parameters and obtain the target speed; and a fan drive control unit for generating a corresponding control signal based on the target speed determined by the adaptive control unit to drive the fan to operate at the target speed.

[0008] The calculation unit is used to: calculate the dry rotation speed S included in the working parameters retrieved by the parameter setting unit. dry Dry power P dry The dry torque T is calculated. dry And the wet rotation speed S included in the operating parameters. wet Wet power P wet The wet torque T is calculated. wet .

[0009] Among them, when S dry =S wet At that time, the adaptive control unit determines that the fan is in a constant speed operating mode, and the dry speed S dry / Wet speed S wet The target rotational speed is used to control the fan according to the dry rotational speed S. dry / Wet speed S wet run.

[0010] Among them, when S dry <Swet And T dry ≥T wet At that time, the adaptive control unit determines the corresponding adaptive operating parameters as follows: the current torque T is adjusted. cur As the independent variable, the target rotational speed is adjusted once at a predetermined time interval t; where, when T cur >T dry At that time, the adaptive control unit is used to adjust the corresponding dry speed S dry The target rotational speed is sent to the wind turbine drive control unit to drive the wind turbine according to the dry rotational speed S. dry Work; when T cur <T wet At that time, the adaptive control unit is used to adjust the corresponding wet rotational speed S. wet The target rotational speed is sent to the fan drive control unit to drive the fan according to the wet rotational speed S. wet Work; when T wet ≤T cur ≤T dry At that time, the adaptive control unit is used to: transfer the calculated adaptive target speed S cur 'Sent to the wind turbine drive control unit to drive the wind turbine according to the adaptive target speed S' cur Run for a predetermined time t; determine the target speed and the adaptive speed S. calc The difference is checked against a preset value; if it is less than the preset value, the target speed is sent to the fan drive control unit to drive the fan to operate at the target speed; if it is not less than the preset value, a new adaptive target speed S is calculated. (cur+t) 'Sent to the wind turbine drive control unit to drive the wind turbine according to the new adaptive target speed S' (cur+t) 'Run for a predetermined time t, and repeat until the target speed matches the adaptive speed S.' calc The difference is less than a preset value; wherein, the adaptive target rotational speed S is calculated. cur Specifically, this includes: the dry rotation speed S included in the operating parameters retrieved by the adaptive control unit using the parameter setting unit. dry Dry torque T dry Wet speed S wet Wet torque T wet Fit the corresponding linear function and then use the current torque T cur Substituting the linear function into the equation, the adaptive rotational speed S is calculated. calc ; and at the current rotational speed S cur With the adaptive speed S calc The average value is calculated to obtain the adaptive target rotational speed S. cur '.

[0011] Among them, when S dry wet And T dry <T wet At that time, the adaptive control unit determines the corresponding adaptive operating parameters as follows: the current torque T is adjusted. cur As the independent variable, the target rotational speed is adjusted once at predetermined intervals; where, when T cur <T dry At that time, the adaptive control unit is used to adjust the corresponding wet rotational speed S. wet The target rotational speed is sent to the fan drive control unit to drive the fan according to the wet rotational speed S. wet Work; when T cur >T wet At that time, the adaptive control unit is used to adjust the corresponding dry speed S dry The target rotational speed is sent to the wind turbine drive control unit to drive the wind turbine according to the dry rotational speed S. dry Work; when T dry ≤T cur ≤T wet At that time, the adaptive control unit is used to adjust the current rotational speed S. cur The target rotational speed is sent to the fan drive control unit to drive the fan to maintain the current rotational speed.

[0012] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is to provide an adaptive control system for fan coil units, including a temperature controller and a fan, and the system further includes a fan controller as described above; the temperature controller and the fan are both connected to the fan controller.

[0013] ​To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: providing an adaptive control method for fan coil units, the method comprising: the fan controller querying a pre-saved parameter form according to the fan coil unit model set by the DIP switch, to determine and retrieve the corresponding operating parameters of the fan coil unit model; wherein, the parameter form is used to record the fan coil unit model, static pressure type, and operating mode parameters in association; the parameter form includes at least one fan coil unit model, i static pressure types configured for each fan coil unit, and at least one of m operating positions configured for each static pressure type. The operating mode has x sets of operating parameters, where x is a natural number; the fan controller generates a corresponding gear signal in response to the temperature controller's setting of the fan coil unit's operating gear; the fan controller selects the corresponding operating parameters from the retrieved operating parameters based on the gear signal to calculate the target torque; the fan controller calculates the corresponding adaptive operating parameters and obtains the target speed based on the target torque, operating parameters, and detected current operating status parameters of the fan; and the fan controller generates a corresponding control signal based on the determined target speed to drive the fan to operate at the target speed.

[0014] Specifically, the fan controller selects the corresponding operating parameters from the retrieved operating parameters based on the gear position signal to calculate the target torque. This includes: the fan controller selecting the corresponding operating parameters from the retrieved operating parameters based on the gear position signal, and calculating the target torque based on the dry speed S included in the operating parameters. dry Dry power P dry The dry torque T is calculated. dry And the wet rotation speed S included in the operating parameters. wet Wet power P wet The wet torque T is calculated. wet .

[0015] The wind turbine controller calculates the corresponding adaptive operating parameters and obtains the target speed based on the target torque, operating parameters, and detected current operating status parameters of the wind turbine. Specifically, the wind turbine controller determines the target speed. dry With S wet The size relationship; the fan controller when S dry =S wet At that time, the corresponding target rotational speed is determined to be the dry rotational speed S. dry / Wet speed S wet The fan controller when S dry wet At that time, it was also determined that T dry T wet ​The magnitude relationship; the wind turbine controller determines the corresponding adaptive operating parameters as follows: the current torque T cur The target rotational speed is adjusted once at a predetermined time interval t, which is the independent variable.

[0016] Among them, when T dry ≥T wet At that time, the wind turbine controller determines the corresponding adaptive operating parameters as follows: the current torque T is adjusted. cur As the independent variable, the target rotational speed is adjusted once at a predetermined time interval t, specifically including: the fan controller determining T. dry T cur T wet The size relationship; the fan controller when T cur >T dry At that time, select the appropriate dry speed S dry As the target rotational speed; the fan controller when T cur <T wet At that time, select the appropriate wet rotation speed S wet As the target rotational speed; the fan controller when T wet ≤T cur ≤T dry At that time, retrieve the dry rotation speed S included in the operating parameters. dry Dry torque T dry Wet speed S wet Wet torque T wet and the current rotational speed S included in the detected current operating status parameters of the fan. cur Current power P cur and the calculated current torque T cur To calculate the adaptive target rotational speed S cur After the fan controller drives the fan to operate according to the determined adaptive operating parameters, the method further includes: the fan controller determining the adaptive target speed S. cur 'Control the wind turbine unit to operate for a predetermined time t; if so, determine the target speed and the adaptive speed S.' calc If the difference is less than a preset value, then drive the fan to operate at the target speed; if not, return to the execution of the fan controller when T wet ≤T cur ≤T dry At that time, the working parameters retrieved include the dry rotation speed S dry Dry torque T dry Wet speed S wet Wet torque T wet and the current rotational speed S included in the detected current operating status parameters of the fan. (cur+t) Current power Pcur and the calculated current torque T (cur+t) Calculate the new adaptive target rotational speed S (cur+t) '.

[0017] Wherein, the wind turbine controller when T wet ≤T cur ≤T dry At that time, the working parameters retrieved include the dry rotation speed S dry Dry torque T dry Wet speed S wet Wet torque T wet and the current rotational speed S included in the detected current operating status parameters of the fan. cur Current power P cur and the calculated current torque T cur Calculate the adaptive target rotational speed S cur Specifically, this includes: the wind turbine controller when T... wet ≤T cur ≤T dry At that time, retrieve the dry rotation speed S included in the operating parameters. dry Dry torque T dry Wet speed S wet Wet torque T wet Fit the corresponding linear function and then use the current torque T cur Substituting the linear function into the equation, the adaptive rotational speed S is calculated. calc The fan controller uses the current speed S cur With the adaptive speed S calc The average value is calculated to obtain the adaptive target rotational speed S. cur '.

[0018] Among them, when T dry <T wet At that time, the wind turbine controller determines the corresponding adaptive operating parameters as follows: the current torque T is adjusted. cur As the independent variable, the target rotational speed is adjusted once at a predetermined time interval t, specifically including: the fan controller determining T. dry T cur T wet The size relationship; the fan controller when T cur <T dry At that time, select the appropriate wet rotation speed S wet As the target rotational speed; the fan controller when T cur >T wet At that time, select the appropriate dry speed S dry As the target rotational speed; the fan controller when T dry ≤T cur ≤Twet At that time, select the corresponding current speed S cur The target rotational speed is referred to as the rotational speed.

[0019] The beneficial effects of this invention are as follows: Unlike existing technologies, this invention provides a fan controller and an adaptive control system and method for fan coil units. The fan controller, based on the unit's specifications set by a DIP switch and receiving the gear setting from the thermostat, obtains the corresponding adaptive parameters by looking up a table. Without additional sensors, the fan controller can automatically identify whether the unit is currently operating in a dry or wet condition based on the equivalent load differences under different operating conditions, and control the fan coil unit's speed under the corresponding condition. Furthermore, when the operating condition is between ventilation and cooling, the fan controller can control the fan coil unit's intermediate speed for a smooth transition, thereby reducing noise and improving energy efficiency. The adaptive control of the fan coil unit in this invention utilizes torque as the independent variable to control the fan coil unit's speed, more closely approximating actual fan load changes and improving the stability of fan speed control. Using linear function fitting combined with successive approximation to control the target speed effectively avoids fluctuations in the target speed, enabling the fan to operate stably at a transition speed under intermediate operating conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an adaptive control system for a fan coil unit according to an embodiment of the present invention;

[0022] Figure 2 It is S dry wet And T dry ≥T wet A schematic diagram illustrating the relationship between target speed and torque under the given conditions;

[0023] Figure 3 It is S dry wet And T dry <T wet A schematic diagram illustrating the relationship between target speed and torque under the given conditions;

[0024] Figure 4 This is a flowchart illustrating an adaptive control method for a fan coil unit according to the first embodiment of the present invention.​​

[0025] Figure 5 This is a flowchart illustrating an adaptive control method for a fan coil unit according to the second embodiment of the present invention.

[0026] Figure 6 This is a flowchart illustrating an adaptive control method for a fan coil unit according to the third embodiment of the present invention.

[0027] Figure 7 yes Figure 7 A flowchart illustrating the specific implementation method of step S534a shown;

[0028] Figure 8 This is a flowchart illustrating an adaptive control method for a fan coil unit according to the fourth embodiment of the present invention. Detailed Implementation

[0029] To facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figure 1 This is a schematic diagram of an adaptive control system for a fan coil unit according to an embodiment of the present invention. The control system 10 includes a fan controller 20, a thermostat 30, and a fan 40. Both the thermostat 30 and the fan 40 are connected to the fan controller 20. The fan controller 20 drives the fan 40 to operate according to the settings of the thermostat 30, thereby adjusting the airflow, cooling capacity, and heating capacity of the fan coil unit.

[0032] The temperature controller 30 is used to set the operating speed of the fan coil unit in response to the operator's speed setting operation.

[0033] The fan coil unit is pre-set with m operating positions; the ducted air handling unit controller 10 pre-stores a parameter form to record the fan coil unit model, static pressure type, and operating mode parameters. Specifically, the parameter form includes at least one fan coil unit model, i static pressure types configured for each fan coil unit, and x sets of operating parameters under at least one operating mode in the m operating positions configured for each static pressure type, where x is a natural number.

[0034] In this embodiment, the fan controller 20 is pre-configured to support thirteen specifications of fan coil units as defined in the national standard GB / T19232-2019. Each unit is divided into four sub-units according to static pressure type, thereby enabling the control of 52 specifications and models of fan coil units. The control of each fan coil unit must achieve the rated air volume and rated cooling capacity defined in the national standard GB / T19232-2019. Furthermore, based on whether water flows through the fan coil unit's fan coil, the operating environment of the fan coil unit is divided into dry and wet operating conditions. Rated air volume is the operating indicator of the fan coil unit under dry conditions, and rated cooling capacity is the operating indicator of the fan coil unit under wet conditions. In dry conditions, no water flows through the fan coil, while in wet conditions, water at a suitable temperature is injected into the fan coil. The resistance of the fan coil unit differs under these two operating conditions. The fan controller 20 can automatically identify whether the fan coil unit is currently operating in a dry or wet condition based on the equivalent load difference under different operating conditions, without the need for additional sensors, and control the fan speed accordingly. The detection of water flow into the fan coil unit and its status to control and detect dry and wet conditions is not a significant innovation of this invention and can be achieved using existing technology, so it will not be elaborated upon here.

[0035] Each fan coil unit has three operating positions, each corresponding to a set of set parameters. Each set of parameters includes the speed and power under dry conditions, and the speed and power under wet conditions. Therefore, the fan controller can have 156 sets of set parameters to control 52 different models of fan coil units.

[0036] As described above, the parameter form includes 13 fan coil unit models, each fan coil unit is configured with 4 static pressure types, each static pressure type can realize 3 working levels, namely, high level, medium level and low level working modes, and each working level is configured with two working modes: dry condition and wet condition, as well as one set of working parameters (P, S) configured for each working mode; where P is the output power and S is the target speed.

[0037] The specific parameters corresponding to the specifications and models of the fan coil units are as follows:

[0038]

[0039]

[0040] Table 1

[0041] The fan controller 20 includes: a parameter setting unit 21, a fan drive control unit 22, a working status monitoring unit 23, a calculation unit 24, an adaptive control unit 25, and a signal conversion unit 26.

[0042] The parameter setting unit 21 includes a DIP switch 210, which is used to set the model of the fan coil unit in response to the operator's DIP operation.

[0043] The parameter setting unit 21 is used to query the pre-saved parameter form according to the model of the fan coil unit set by the DIP switch 210, so as to determine and retrieve the working parameters corresponding to the model of the fan coil unit.

[0044] The signal conversion unit 26 is connected between the thermostat 30 and the calculation unit 24, and is used to generate a corresponding gear signal in response to the thermostat 30 setting the operating gear of the fan coil unit. Specifically, the thermostat 30 selects one gear from m operating gears to generate a control signal, and the signal conversion circuit 26 generates the corresponding gear signal based on the control signal.

[0045] The calculation unit 24 is used to select corresponding operating parameters from the operating parameters retrieved by the parameter setting unit 21 based on the gear signal generated by the signal conversion unit 26 to calculate the target torque. Specifically, the calculation unit 24 calculates the target torque based on the dry speed S included in the operating parameters. dry Dry power P dry The dry torque T is calculated. dry And the wet rotation speed S included in the operating parameters. wet Wet power P wet The wet torque T is calculated. wet .

[0046] The working status monitoring unit 23 is used to detect the working status parameters of the fan 40 to determine the current speed and current output power of the fan coil unit.

[0047] The adaptive control unit 25 is used to calculate based on the target torque and operating parameters output by the calculation unit 24 and the operating status parameters detected by the operating status monitoring unit 23, in order to determine the corresponding adaptive operating parameters and obtain the target speed.

[0048] The fan drive control unit 22 is used to generate a corresponding control signal based on the target speed determined by the adaptive control unit 25, so as to drive the fan 40 to work at the target speed.

[0049] For different fan coil units, to meet the operating indicators under different conditions, it is necessary to calibrate the corresponding fan speed and power under standard operating conditions. During parameter calibration, it is necessary to find the fan speed that can achieve the rated air volume and rated cooling capacity of the corresponding unit, and record the output power of the fan controller during stable operation. Specifically, under standard dry operating conditions, the fan speed that can meet the rated air volume is the dry speed, and the power during stable operation at the dry speed is the dry power; the dry power is calculated using the dry speed and dry power. Under standard wet operating conditions, the fan speed that can meet the rated cooling capacity is the wet speed, and the power during stable operation at the wet speed is the wet power; the wet power is calculated using the wet speed and wet power. Using (dry torque, dry speed) and (wet torque, wet speed) as two inflection points in the torque-speed coordinate system, the torque-speed curves under different conditions are obtained based on the relative positions of these two points. The fan controller 20 implements adaptive control under different conditions based on the torque-speed curves.

[0050] Specifically, based on the relationship between speed and torque under the two operating conditions, we can divide it into the following three cases:

[0051] (1) When S dry =S wet

[0052] The adaptive control unit 25 determines that the fan coil unit is in constant speed operating mode, that is, when the operating conditions change and cause a change in the load torque of the fan coil unit, the fan controller 20 still controls the fan coil unit to operate at dry speed S. dry / Wet speed S wet run.

[0053] (2) When S dry wet And T dry ≥T wet

[0054] The adaptive control unit 25 determines the corresponding adaptive operating parameters as follows: The current torque T... cur As the independent variable, the target rotational speed is adjusted once at a predetermined time interval t; specifically:

[0055] When T cur >T dry At that time, that is, when the fan coil unit is in dry operating mode, the adaptive control unit 25 will set the corresponding dry speed S. dry The target rotational speed is sent to the fan drive control unit 22 to drive the fan 40 according to the dry rotational speed S. dry Work;

[0056] When T cur <T wet ​At that time, that is, when the fan coil unit is in wet operating mode, the adaptive control unit 25 will adjust the corresponding wet speed S. wet The target rotational speed is sent to the fan drive control unit 22 to drive the fan 40 according to the wet rotational speed S. wet Work;

[0057] When T wet ≤T cur ≤T dry At that time, the operating mode of the fan coil unit is between two operating conditions, and the adaptive control unit 25:

[0058] The calculated adaptive target speed S cur The signal is sent to the fan drive control unit 22 to drive the fan 40 according to the adaptive target speed S. cur 'Running for the scheduled time t;

[0059] Determine the target speed and the adaptive speed S calc Is the difference less than the preset value?

[0060] When the target rotational speed is less than the preset value, the target rotational speed is sent to the fan drive control unit 22 to drive the fan 40 to work at the target rotational speed;

[0061] When it is not less than the preset value, the new adaptive target speed S will be calculated. (cur+t) The signal is sent to the wind turbine drive control unit 22 to drive the wind turbine 40 according to the new adaptive target speed S. (cur+t) Run for a predetermined time t; then, continue to compare the target speed with the adaptive speed S. calc The difference is checked against the preset value, and this process is repeated to gradually approach a stable target speed that is suitable for the current torque.

[0062] Specifically, the adaptive control unit 25 is used for:

[0063] The dry rotation speed S included in the operating parameters retrieved by the parameter setting unit 21 dry Dry torque T dry Wet speed S wet Wet torque T wet Fit the corresponding linear function and then use the current torque T cur Substituting the linear function into the equation, the adaptive rotational speed S is calculated. calc ;

[0064] With the current rotational speed S cur With the adaptive speed S calc The average value is calculated to obtain the adaptive target rotational speed S. cur '.

[0065] Similarly, the adaptive control unit 25 will use the current torque T (cur+t) Substituting the linear function into the equation, the new adaptive rotational speed S is calculated. (calc+t) and with the current rotational speed S (cur+t) With the new adaptive speed S (calc+t) The average value is calculated to obtain the new adaptive target rotational speed S. (cur+t) '.

[0066] The adaptive control unit 25 controls the fan 40 to operate at the target speed until the torque changes, at which point the adaptive control is restarted. In this embodiment, the preset value is 5 rpm.

[0067] Please also refer to Figure 2 , for S dry wet And T dry ≥T wet A schematic diagram illustrating the relationship between target speed and torque under certain conditions. The current torque is less than T. wet At that time, the fan 40 operates at a wet speed S wet Running; current torque is greater than T dry At that time, the fan 40 operates at a dry speed S dry Running; current torque is between T wet and T dry During this period, the operating speed of the fan 40 is continuously adjusted within a gradually narrowing speed range to eventually achieve dynamic equilibrium. This is because, under intermediate operating conditions, the speed and torque will not perfectly correspond to the fitted linear function curve depending on the actual situation, so a window is needed to achieve dynamic equilibrium.

[0068] In this embodiment, the predetermined time is 3 seconds.

[0069] (3) When S dry wet And T dry <T wet hour

[0070] The adaptive control unit 25 determines the corresponding adaptive operating parameters as follows: The current torque T... cur As the independent variable, the target rotational speed is adjusted once at predetermined intervals; specifically:

[0071] When T cur <T dry At that time, that is, when the fan coil unit is in wet operating mode, the adaptive control unit 25 will adjust the corresponding wet speed S. wet ​​The target rotational speed is sent to the fan drive control unit 22 to drive the fan 40 according to the wet rotational speed S. wet Work;

[0072] When T cur >T wet At that time, that is, when the fan coil unit is in dry operating mode, the adaptive control unit 25 will set the corresponding dry speed S. dry The target rotational speed is sent to the fan drive control unit 22 to drive the fan 40 according to the dry rotational speed S. dry Work;

[0073] When T dry ≤T cur ≤T wet At that time, the fan coil unit operates between two conditions, and the adaptive control unit 25 will adjust the current speed S. cur The target rotational speed is sent to the fan drive control unit 22 to drive the fan 40 to maintain the current rotational speed.

[0074] Once the load continues to change and the above two conditions are met, the speed should be readjusted.

[0075] Please also refer to Figure 3 , for S dry wet And T dry <T wet A schematic diagram illustrating the relationship between target speed and torque under certain conditions. The current torque is less than T. dry At that time, the fan 40 operates at a wet speed S wet Running; the current torque is gradually increasing but has not exceeded T. wet At this time, the fan 40 continues to maintain a wet speed S wet Execution; when the current torque continues to increase to greater than T wet At that time, the fan 40 changes to a dry rotation speed S dry Operation; when the fan 40 operates at the dry speed S dry During operation, the corresponding current torque gradually decreases but does not fall below T. dry At this time, the fan 40 continues to maintain a dry rotation speed S dry Running; when the current torque continues to decrease to less than T dry At that time, the fan 40 changes to a wet speed S wet The operation is repeated to prevent the speed of the fan 40 from fluctuating.

[0076] Please see Figure 4 This is a flowchart illustrating an adaptive control method for a fan coil unit according to a first embodiment of the present invention. The method includes the following steps: ​

[0077] In step S41, the fan controller 20 queries a pre-saved parameter form according to the fan coil unit model set by the DIP switch 210 to determine and retrieve the working parameters corresponding to the fan coil unit model.

[0078] The parameter form is used to record the fan coil unit model, static pressure type, and working mode parameters in a related manner. The parameter form includes at least one fan coil unit model, i static pressure types configured for each fan coil unit, and x sets of working parameters under at least one working mode with m working positions configured for each static pressure type, where x is a natural number.

[0079] In step S42, the fan controller 20 generates a corresponding gear signal in response to the temperature controller 30 setting the operating gear of the fan coil unit.

[0080] In step S43, the fan controller 20 selects the corresponding operating parameter from the retrieved operating parameters according to the gear position signal to calculate the target torque.

[0081] Specifically, the fan controller 20 selects the corresponding operating parameter from the retrieved operating parameters based on the gear position signal, and selects the dry rotation speed S included in the operating parameters. dry Dry power P dry The dry torque T is calculated. dry And the wet rotation speed S included in the operating parameters. wet Wet power P wet The wet torque T is calculated. wet .

[0082] In step S44, the fan controller 20 calculates based on the target torque and operating parameters, as well as the detected current operating state parameters of the fan 40, to determine the corresponding adaptive operating parameters and obtain the target speed.

[0083] In step S45, the fan controller 20 generates a corresponding control signal based on the determined target rotational speed to drive the fan 40 to operate at the target rotational speed. Then, the process ends.

[0084] The adaptive operating parameters include the target rotational speed.

[0085] Please see Figure 5 This is a flowchart illustrating an adaptive control method for a fan coil unit according to a second embodiment of the present invention. Step S44, where the fan controller 20 calculates the corresponding adaptive operating parameters and obtains the target speed based on the target torque, operating parameters, and the detected current operating state parameters of the fan 40, specifically includes the following steps:

[0086] Step S50, the fan controller 20 determines S dry With S wet The size relationship; when S dry =S wet If S , then step S51 is executed; when S dry wet If so, then proceed to step S52;

[0087] Step S51, the fan controller 20 determines the corresponding target speed as the dry speed S. dry / Wet speed S wet Then, proceed to step S45.

[0088] Step S52, the fan controller 20 determines T dry T wet Size relationship;

[0089] Step S53, the wind turbine controller 20 determines the corresponding adaptive operating parameters as follows: the current torque T cur The target rotational speed is adjusted once at predetermined intervals t, with the speed as the independent variable. Then, step S45 is executed.

[0090] Please see Figure 6 This is a flowchart illustrating an adaptive control method for a fan coil unit according to the third embodiment of the present invention. Wherein, when T... dry ≥T wet In step S53, the fan controller 20 determines the corresponding adaptive operating parameters as follows: the current torque T... cur As the independent variable, the target rotational speed is adjusted once at a predetermined time interval t, specifically including:

[0091] Step S531a, the fan controller 20 determines T dry T cur T wet The size relationship; when T cur >T dry When T is reached, step S532a is executed; when T is reached... cur <T wet When T is reached, step S533a is executed; when T is reached... wet ≤T cur ≤T dry When this happens, proceed to step S534a;

[0092] In step S532a, the fan controller 20 selects the corresponding dry speed S. dry The target rotational speed is then determined. Step S45 is then executed.

[0093] ​In step S533a, the fan controller 20 selects the corresponding wet speed S. wet The target rotational speed is then determined. Step S45 is then executed.

[0094] In step S534a, the fan controller 20 retrieves the dry rotation speed S included in the operating parameters. dry Dry torque T dry Wet speed S wet Wet torque T wet and the current rotational speed S included in the current operating status parameters of the fan 40 obtained by detection. cur Current power P cur and the calculated current torque T cur To calculate the adaptive target rotational speed S cur Then, proceed to step S45.

[0095] Furthermore, please also refer to Figure 7 The diagram below illustrates the specific implementation method of step S534a. Specifically, step S534a involves the fan controller 20 retrieving the dry rotation speed S included in the operating parameters. dry Dry torque T dry Wet speed S wet Wet torque T wet and the current rotational speed S included in the current operating status parameters of the fan 40 obtained by detection. cur Current power P cur and the calculated current torque T cur To calculate the adaptive target rotational speed S cur Specifically, it includes the following steps:

[0096] In step S5341a, the fan controller 20 retrieves the dry rotation speed S included in the operating parameters. dry Dry torque T dry Wet speed S wet Wet torque T wet Fit the corresponding linear function and then use the current torque T cur Substituting the linear function into the equation, the adaptive rotational speed S is calculated. calc ;

[0097] Step S5342a, the fan controller 20 sets the current rotational speed S cur With the adaptive speed S calc The average value is calculated to obtain the adaptive target rotational speed S. cur '.

[0098] Furthermore, the method also includes:

[0099] Step S46, the fan controller 20 determines the adaptive target speed S. cur Control the operation of the fan 40 for a predetermined time t; if so, proceed to step S47; otherwise, continue to step S46.

[0100] Step S47, the fan controller 20 determines the target speed and the adaptive speed S calc Is the difference less than a preset value? If yes, return to step S45; otherwise, return to step S534a to calculate the new adaptive target speed S. (cur+t) '.

[0101] In this embodiment, the preset value is 5 rpm.

[0102] Specifically, the fan controller 20 uses the adaptive target speed S cur After the fan 40 has been controlled to run for a predetermined time t, it will operate at a new adaptive target speed S. (cur+t) After the fan 40 has been running for a predetermined time t, the adaptive target speed calculation described above is performed again. This process is repeated to gradually approach a stable target speed suitable for the current torque. The adaptive control unit 25 controls the fan 40 to run at the target speed until the torque changes, at which point the adaptive control is restarted.

[0103] Because the torque of a fan differs during speed regulation from that during stable operation—for example, the calculated torque during acceleration may be larger than the actual torque, while the calculated torque during deceleration may be smaller—in actual working environments, if only a simple linear relationship is used to control the switching of operating conditions, the target speed may fluctuate back and forth between dry and wet speeds, resulting in significant noise. Adding a successive approximation method effectively improves this fluctuation, enabling the fan to operate stably at transition speeds under intermediate operating conditions.

[0104] Please see Figure 8 This is a flowchart illustrating an adaptive control method for a fan coil unit according to the fourth embodiment of the present invention. Wherein, when T... dry <T wet In step S53, the fan controller 20 determines the corresponding adaptive operating parameters as follows: the current torque T... cur As the independent variable, the target rotational speed is adjusted once at predetermined intervals, specifically including:

[0105] Step S531b, the fan controller 20 determines T dry T cur T wet The size relationship; when T cur <T dry When T is reached, step S532b is executed; when T is reached... cur >Twet When T is reached, step S533b is executed; when T is reached... dry ≤T cur ≤T wet When the time comes, execute step S534b;

[0106] In step S532b, the fan controller 20 selects the corresponding wet speed S. wet The target rotational speed is then determined. Step S45 is then executed.

[0107] In step S533b, the fan controller 20 selects the corresponding dry speed S. dry The target rotational speed is then determined. Step S45 is then executed.

[0108] In step S534b, the fan controller 20 selects the corresponding current speed S. cur The target rotational speed is then determined. Step S45 is then executed.

[0109] This invention provides a fan controller and an adaptive control system and method for fan coil units. The fan controller, based on the unit's specifications set by a DIP switch and receiving the gear setting from the thermostat, obtains the corresponding adaptive parameters by looking up a table. Without additional sensors, the fan controller automatically identifies whether the unit is currently operating in dry or wet conditions based on the equivalent load differences under different operating conditions, and controls the fan coil unit's speed accordingly. Furthermore, when the operating condition is between ventilation and cooling, the fan controller can control the fan's intermediate speed for a smooth transition, thereby reducing noise and improving energy efficiency. The adaptive control of the fan coil unit in this invention utilizes torque as the independent variable to control the fan coil unit's speed, more closely approximating actual fan load changes and improving the stability of fan speed control. Using linear function fitting combined with successive approximation to control the target speed effectively avoids fluctuations in the target speed, enabling the fan to operate stably at transition speeds under intermediate operating conditions.

[0110] In the embodiments provided by this invention, the disclosed systems, terminals, and methods can be implemented in other ways. For example, the terminal embodiments described above are illustrative, and the division of units is a logical functional division; in actual implementation, there may be other division methods. The units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0111] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in a combination of hardware and software functional units. The integrated unit implemented as a software functional unit can be stored in a computer-readable storage medium. The software functional unit stored in the storage medium includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0112] It should be noted that while the preferred embodiments of the present invention are provided in the specification and accompanying drawings, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of the present invention; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of the present invention specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A fan controller, electrically connected to a thermostat and a fan respectively; characterized in that, The wind turbine controller includes: The parameter setting unit includes: a DIP switch, which is used to set the model of the fan coil unit in response to the operator's DIP operation; the parameter setting unit queries a pre-saved parameter form according to the fan coil unit model set by the DIP switch to determine and retrieve the working parameters corresponding to the fan coil unit model; wherein, the parameter form is used to record the fan coil unit model, static pressure type and working mode parameters in association; the parameter form includes at least one fan coil unit model, i static pressure types configured for each fan coil unit, and x sets of working parameters in at least one working mode under m working positions configured for each static pressure type, where x is a natural number; The signal conversion unit is used to generate a corresponding gear signal in response to the temperature controller's setting of the working gear of the fan coil unit; The calculation unit is used to select the corresponding working parameters from the working parameters retrieved by the parameter setting unit based on the gear signal generated by the signal conversion unit to calculate the target torque. The operating status monitoring unit is used to detect the operating status parameters of the fan to determine the current speed and current output power of the fan coil unit. An adaptive control unit is used to perform calculations based on the target torque and operating parameters output by the calculation unit and the operating state parameters detected by the operating state monitoring unit to determine the corresponding adaptive operating parameters and obtain the target speed. The fan drive control unit is used to generate a corresponding control signal based on the target speed determined by the adaptive control unit, so as to drive the fan to work at the target speed.

2. The fan controller according to claim 1, characterized in that, The calculation unit is used to calculate the dry rotation speed included in the working parameters retrieved by the parameter setting unit. S dry Dry power P dry The dry torque was calculated. T dry and the wet rotation speed included in the operating parameters. S wet Wet power P wet The wet torque was calculated. T wet .

3. The fan controller according to claim 2, characterized in that, when S dry = S wet At that time, the adaptive control unit determines that the wind turbine is in a constant speed operating mode, and the dry speed... S dry / wet speed S wet The target rotational speed is used to control the fan to operate at the dry rotational speed. S dry / wet speed S wet run.

4. The fan controller according to claim 2, characterized in that, when S dry < S wet ,and T dry T wet At that time, the adaptive control unit determines the corresponding adaptive operating parameters as follows: the current torque... T cur As the independent variable, the predetermined interval t Adjust the target speed once; among which, when T cur > T dry At that time, the adaptive control unit is used to adjust the corresponding dry speed. S dry The target rotational speed is sent to the fan drive control unit to drive the fan according to the target rotational speed. S dry Work; when T cur < T wet At that time, the adaptive control unit is used to adjust the corresponding wet rotation speed. S wet The target rotational speed is sent to the fan drive control unit to drive the fan according to the wet rotational speed. S wet Work; when T wet T cur T dry At that time, the adaptive control unit is used to: The calculated adaptive target speed S cur 'Send to the wind turbine drive control unit to drive the wind turbine according to the adaptive target speed' S cur 'Running scheduled time' t ; Determine the target speed and the adaptive speed S calc Is the difference less than the preset value? When the target rotational speed is less than a preset value, the target rotational speed is sent to the fan drive control unit to drive the fan to operate at the target rotational speed. A new adaptive target speed will be calculated when the value is not less than the preset value. S (cur+t) 'Sent to the wind turbine drive control unit to drive the wind turbine according to the new adaptive target speed' S (cur+t) 'Running scheduled time' t This process is repeated until the target speed matches the adaptive speed. S calc The difference is less than the preset value; Among them, the adaptive target rotational speed is calculated. S cur Specifically, this includes: the dry rotation speed included in the operating parameters retrieved by the adaptive control unit using the parameter setting unit. S dry dry torque T dry wet rotation speed S wet wet torque T wet Fit the corresponding linear function and the current torque T cur The adaptive speed is calculated by substituting the linear function into the equation. S calc ; and at the current rotational speed S cur With the adaptive speed S calc The average value is calculated to obtain the adaptive target rotational speed. S cur '.

5. The fan controller according to claim 2, characterized in that, when S dry < S wet ,and T dry < T wet At that time, the adaptive control unit determines the corresponding adaptive operating parameters as follows: the current torque... T cur As the independent variable, the target rotational speed is adjusted once at predetermined intervals; where... when T cur < T dry At that time, the adaptive control unit is used to adjust the corresponding wet rotation speed. S wet The target rotational speed is sent to the fan drive control unit to drive the fan according to the wet rotational speed. S wet Work; when T cur > T wet At that time, the adaptive control unit is used to adjust the corresponding dry speed. S dry The target rotational speed is sent to the wind turbine drive control unit to drive the wind turbine according to the target rotational speed. S dry Work; when T dry T cur T wet At that time, the adaptive control unit is used to adjust the current rotational speed. S cur The target rotational speed is sent to the fan drive control unit to drive the fan to maintain the current rotational speed.

6. An adaptive control system for a fan coil unit, comprising: The system includes a thermostat and a fan, characterized in that the system further includes a fan controller as described in any one of claims 1 to 5; the thermostat and the fan are both connected to the fan controller.

7. An adaptive control method for a fan coil unit, applied to a fan controller as described in any one of claims 1 to 5, characterized in that, The method includes: The fan controller queries a pre-saved parameter form based on the fan coil unit model set by the DIP switch to determine and retrieve the corresponding operating parameters for the fan coil unit model. The parameter form records the fan coil unit model, static pressure type, and operating mode parameters in a related manner. The parameter form includes at least one fan coil unit model, i static pressure types configured for each fan coil unit, and x sets of operating parameters under at least one operating mode with m operating positions configured for each static pressure type, where x is a natural number. The fan controller generates a corresponding gear signal in response to the temperature controller's setting of the working gear of the fan coil unit. The fan controller selects the corresponding operating parameters from the retrieved operating parameters based on the gear position signal to calculate the target torque; The wind turbine controller calculates the corresponding adaptive operating parameters and obtains the target speed based on the target torque, operating parameters, and detected current operating status parameters of the wind turbine; and The fan controller generates a corresponding control signal based on the determined target rotational speed to drive the fan to operate at the target rotational speed.

8. The adaptive control method for fan coil units according to claim 7, characterized in that, The fan controller selects corresponding operating parameters from the retrieved operating parameters based on the gear position signal to calculate the target torque, specifically including: The fan controller selects the corresponding operating parameter from the retrieved operating parameters based on the gear position signal, and selects the dry rotation speed included in the operating parameters. S dry Dry power P dry The dry torque was calculated. T dry and the wet rotation speed included in the operating parameters. S wet Wet power P wet The wet torque was calculated. T wet .

9. The adaptive control method for fan coil units according to claim 8, characterized in that, The wind turbine controller calculates the corresponding adaptive operating parameters and obtains the target speed based on the target torque, operating parameters, and detected current operating status parameters of the wind turbine. Specifically, this includes: The fan controller determines S dry and S wet Size relationship; The fan controller when S dry = S wet At that time, the corresponding target rotational speed is determined as the dry rotational speed. S dry / wet speed S wet ; The fan controller when S dry < S wet At that time, it was also judged T dry , T wet Size relationship; The wind turbine controller determines the corresponding adaptive operating parameters as follows: The current torque... T cur As the independent variable, the predetermined interval t Adjust the target speed once.

10. The adaptive control method for fan coil units according to claim 9, characterized in that, when T dry T wet At that time, the wind turbine controller determines the corresponding adaptive operating parameters as follows: the current torque... T cur As the independent variable, the predetermined interval t Adjusting the target speed once specifically includes: The fan controller determines T dry , T cur , T wet Size relationship; The fan controller when T cur > T dry At that time, select the appropriate dry speed. S dry As the target rotational speed; The fan controller when T cur < T wet When selecting the appropriate wet rotation speed S wet As the target rotational speed; The fan controller when T wet T cur T dry At that time, retrieve the dry rotation speed included in the operating parameters. S dry dry torque T dry wet rotation speed S wet wet torque T wet and the current rotational speed included in the detected current operating status parameters of the fan. S cur Current power P cur and the current torque calculated therefrom T cur To calculate the adaptive target speed S cur '; After the wind turbine controller drives the wind turbine to operate according to the determined adaptive operating parameters, the method further includes: The fan controller determines the adaptive target speed. S cur 'Control fan operation time' t If so, then determine the target speed and the adaptive speed. S calc If the difference is less than a preset value, then drive the fan to operate at the target speed; if not, return to the execution of the fan controller. T wet T cur T dry At that time, the working parameters retrieved include dry rotation speed S dry dry torque T dry wet rotation speed S wet wet torque T wet and the current rotational speed included in the detected current operating status parameters of the fan. S (cur+t) Current power P cur and the current torque calculated therefrom T (cur+t) Calculate the new adaptive target speed S (cur+t) '.

11. The adaptive control method for fan coil units according to claim 10, characterized in that, The fan controller when T wet T cur T dry At that time, the working parameters retrieved include dry rotation speed S dry dry torque T dry wet rotation speed S wet wet torque T wet and the current rotational speed included in the detected current operating status parameters of the fan. S cur Current power P cur and the current torque calculated therefrom T cur Calculate the adaptive target rotation speed S cur Specifically, it includes: The fan controller when T wet T cur T dry At that time, retrieve the dry rotation speed included in the operating parameters. S dry dry torque T dry wet rotation speed S wet wet torque T wet Fit the corresponding linear function and then use the current torque T cur The adaptive speed is calculated by substituting the linear function into the equation. S calc ; The fan controller operates at the current speed. S cur With the adaptive speed S calc The average value is calculated to obtain the adaptive target rotational speed. S cur '.

12. The adaptive control method for fan coil units according to claim 9, characterized in that, when T dry < T wet At that time, the wind turbine controller determines the corresponding adaptive operating parameters as follows: the current torque... T cur As the independent variable, the predetermined interval t Adjusting the target speed once specifically includes: The fan controller determines T dry , T cur , T wet Size relationship; The fan controller when T cur < T dry When selecting the appropriate wet rotation speed S wet As the target rotational speed; The fan controller when T cur > T wet At that time, select the appropriate dry speed. S dry As the target rotational speed; The fan controller when T dry T cur T wet When selecting the corresponding current speed. S cur The target rotational speed is referred to as the rotational speed.

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