Constant air volume control method and device, air conditioning equipment and medium
By establishing a mapping relationship between the swing angle and the fan speed, the fan speed is adjusted in real time, which solves the problem of unstable constant air volume control in ducted air conditioning equipment under long air ducts, and achieves stable air volume output and improved user comfort.
Patent Information
- Application Number
- CN202410514670.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-10-28
AI Technical Summary
Ducted air conditioning equipment suffers from unstable air volume control due to static pressure under long air ducts, resulting in frequent noise fluctuations and reduced user comfort.
By acquiring the mapping relationship corresponding to the current target air volume, and based on the relationship between the swing angle parameter and the fan speed, the fan speed is adjusted in real time to maintain constant air volume output. This includes establishing discrete correspondence and continuous curve relationships to adapt to environmental changes and stepless adjustment.
It achieves stable constant air volume output during the operation of the swing mechanism, reduces air volume output fluctuations, improves user comfort, and reduces noise.
Smart Images
Figure CN120845887A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of home appliance technology, and particularly relates to a constant air volume control method, device, air conditioning equipment and medium. Background Technology
[0002] For ducted air conditioning equipment, if a long exhaust duct is required for air intake, the increased static pressure caused by the long duct affects the actual air volume. At the same rotational speed, a short exhaust duct will produce a larger air volume at the outlet, while a long exhaust duct will produce a smaller air volume. Since the actual length of the exhaust duct installed by the user is entirely limited by the installation environment, resulting in poor uniformity, a constant air volume control mode is needed to achieve a constant air volume output at the outlet under different duct lengths installed by the user.
[0003] Constant air volume control requires real-time sampling of actual characteristic quantities and adjustment of the fan speed based on the difference between the target and actual characteristic quantities to make the actual characteristic quantity equal to or approximately equal to the target characteristic quantity, thus indirectly achieving real-time constant air volume control. However, for air conditioning equipment with swing mechanisms at the air outlet, the cyclical oscillation of the swing mechanism can cause changes in the static pressure inside the air duct, leading to unstable constant air volume control, frequent fluctuations in air volume output, noise generation, and reduced user comfort. Summary of the Invention
[0004] This invention provides a constant air volume control method, device, air conditioning equipment, and medium to solve the technical problem of unstable constant air volume control caused by the operation of the swing mechanism at the air outlet of the air conditioning equipment.
[0005] In a first aspect of the present invention, a constant air volume control method is provided, applied to an air conditioning device having a fan and an air outlet having a swing mechanism, the method comprising: obtaining a mapping relationship corresponding to a current target air volume, the mapping relationship representing the relationship between the swing angle parameter and the fan speed under the current target air volume; during the operation of the swing mechanism, obtaining the current parameter value of the swing angle parameter according to a preset control cycle; obtaining the target speed corresponding to the current parameter value according to the mapping relationship, and adjusting the fan speed to the target speed.
[0006] In conjunction with the first aspect, in some embodiments, obtaining the mapping relationship corresponding to the current target air volume includes: the swing mechanism is in a stopped state, and the fan is controlled to operate in a first constant air volume mode; whether an activation command for the swing function of the air conditioning device is obtained, and if so, establishing a mapping relationship for the current target air volume.
[0007] In conjunction with the first aspect, in some embodiments, establishing the mapping relationship for the current target airflow includes: taking M parameter values of the swing angle parameter as target parameter values, where M is an integer greater than 2; adjusting the swing angle parameter of the swing mechanism to the target parameter value, and controlling the fan to operate in a first constant airflow mode; after the fan operation makes the actual airflow at the air outlet of the air conditioning device meet the current target airflow, obtaining the fan speed value; and establishing the mapping relationship based on the M parameter values and the fan speed value obtained under each parameter value.
[0008] In conjunction with the first aspect, in some embodiments, the M parameter values are used to control the swing mechanism to be in M swing angles in a one-to-one correspondence, wherein the M swing angles are equally spaced divisions of the swing range of the swing mechanism.
[0009] In conjunction with the first aspect, in some embodiments, establishing the mapping relationship based on the M parameter values and the fan speed values obtained under each parameter value includes: establishing a discrete one-to-one correspondence between the M parameter values and the M fan speed values; or performing linear interpolation calculations based on the M parameter values and the fan speed values obtained under each parameter value to obtain N parameter values and N fan speed values, and establishing a discrete one-to-one correspondence between the M+N parameter values and the M+N fan speed values, where N is a positive integer.
[0010] In conjunction with the first aspect, in some embodiments, establishing the mapping relationship based on the M parameter values and the fan speed values obtained under each parameter value includes: performing curve fitting based on the M parameter values and the fan speed values obtained under each parameter value to establish a continuous curve relationship between the swing angle parameter of the swing mechanism and the fan speed.
[0011] In conjunction with the first aspect, in some embodiments, the method further includes: monitoring whether the target air volume changes during the operation of the swing mechanism; if a change in the target air volume is detected, re-establishing the mapping relationship for the changed target air volume.
[0012] In a second aspect of the invention, a constant air volume control device is provided, applied to an air conditioning device having a fan and an air outlet having a swing mechanism. The constant air volume control device includes: a mapping establishment unit, used to acquire a mapping relationship corresponding to a current target air volume, the mapping relationship representing the relationship between the swing angle parameter and the fan speed under the current target air volume; a parameter acquisition unit, used to acquire the current parameter value of the swing angle parameter according to a preset control cycle during the operation of the swing mechanism; a speed acquisition unit, used to acquire a target speed corresponding to the current parameter value according to the mapping relationship; and a control execution unit, used to adjust the fan speed to the target speed.
[0013] In a third aspect of the invention, an air conditioning device is provided, having a fan and an air outlet having an air swing mechanism, and further comprising: a processor; and a memory for storing executable instructions of the processor, wherein the processor is configured to execute the instructions to implement the constant air volume control method described in any of the above embodiments.
[0014] In a fourth aspect of the invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the constant air volume control method described in any of the above embodiments.
[0015] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:
[0016] The system obtains the mapping relationship corresponding to the current target air volume. This mapping relationship represents the relationship between the swing angle parameter and the fan speed under the current target air volume. During the operation of the swing mechanism, the current parameter value of the swing angle parameter is obtained according to a preset control cycle. The target speed corresponding to the current parameter value is obtained according to the mapping relationship. The fan speed is adjusted to the target speed. Thus, the internal fan speed corresponding to different swing angles is used as the target speed for constant air volume control. The fan speed is adjusted so that the output air volume under different swing angles during the operation of the swing mechanism is the same as or approximately the same as the current target air volume. This maintains a certain effect of constant air volume output, thereby reducing air volume output fluctuations during the operation of the swing mechanism, improving user comfort in swing mode, and reducing noise. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A flowchart of a constant air volume control method provided in some embodiments of the present invention is shown;
[0019] Figure 2 The diagram shows a structural schematic of a constant air volume control device provided in some embodiments of the present invention;
[0020] Figure 3 The diagram shows a structural schematic of an air conditioning device provided in some embodiments of the present invention. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0022] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.
[0023] This invention provides a constant air volume control method, which is applied to an air conditioning device with a fan and an air outlet with a swing mechanism. The air conditioning device can be an air conditioning unit, an air purification unit, a humidifier, a heater, a fresh air unit, etc. The constant air volume control method is used to achieve a constant air volume output from the air outlet during the operation of the swing mechanism.
[0024] like Figure 1 As shown, the constant air volume control method provided by the present invention includes the following steps S101 to S103.
[0025] S101: Obtain the mapping relationship corresponding to the current target air volume. The mapping relationship represents the relationship between the swing angle parameter and the fan speed under the current target air volume.
[0026] The mapping relationship established for the current target air volume is a quantitative relationship between the swing angle parameter and the fan speed under the current target air volume. It can include: multiple parameter values of the swing angle parameter and the corresponding speed value for each parameter value. For example, parameter value A1 is mapped to speed value B1, parameter value A1 is mapped to speed value B2, and so on.
[0027] In other implementations, the pre-established mapping relationship for the current target airflow may include different parameter ranges for the swing angle parameter and the corresponding rotational speed value for each parameter range. For example, parameter range A1 is mapped to rotational speed value B1, parameter range A2 is mapped to rotational speed value B2, and so on.
[0028] There can be multiple times when to establish a mapping relationship for the current target airflow; therefore, there are multiple ways to obtain the mapping relationship corresponding to the current target airflow:
[0029] For air conditioning equipment configured with only one or more discrete target air volumes, a mapping relationship can be pre-established between each target air volume and that target air volume:
[0030] In some implementations, for air conditioning equipment configured with only one or more discrete target air volumes, a mapping relationship can be established for each configured target air volume during the initialization process after the air conditioning equipment is installed in the user's environment. Specifically, for application scenarios where the air conditioning equipment is configured with multiple target air volumes for the user to choose from, a mapping relationship characterizing the relationship between the swing angle parameter and the fan speed under that target air volume can be established in advance. For example, an 800m... 3 / h, 1000m 3 / h, 1200m 3 / h, 1400m 3 / h, 1600m 3 There are 5 target air volumes per hour, and 5 mapping relationships are pre-established for these 5 target air volumes.
[0031] In other implementations, the air conditioning equipment is configured with only one or more discrete target air volumes. The prototype can be the controlled object, and a mapping relationship can be established for each target air volume. The mapping relationship corresponding to each target air volume is written into the MCU (Microcontroller Unit) of the air conditioning equipment for the air conditioning equipment to call during operation.
[0032] If a mapping relationship is pre-established for each type of target air volume, then in step S101, when the fan of the air conditioning equipment is running in the first constant air volume mode, if an instruction to activate the swing function of the air conditioning equipment is obtained, the mapping relationship corresponding to the current target air volume is matched from the pre-established multiple mapping relationships.
[0033] As the environmental conditions of the air conditioning unit change (e.g., changes in clogging of the duct and filter components), the same fan speed can result in different actual airflow at the outlet. In scenarios where the target airflow can be infinitely adjusted, pre-establishing a mapping relationship is not suitable. Therefore, in some embodiments, when the swing mechanism is stopped (i.e., the swing function is off), the air conditioning unit's fan is controlled to operate in a first constant airflow mode. During this operation, if an activation command for the swing function is received, a mapping relationship is established for the current target airflow. After the mapping relationship is established, the fan is controlled to operate in a second constant airflow mode based on this relationship. This second constant airflow mode is the execution of steps S102-S103. In other words, the mapping relationship is only triggered each time the swing function is activated, enabling online establishment and updating of the mapping relationship to adapt to changes in the environmental conditions of the air conditioning unit and scenarios requiring infinitely adjustable target airflow. This improves the accuracy of the target speed used for constant airflow control of the fan. For example, the current target air volume is 1600m³ / h. 3 / h, in the mapping relationship corresponding to the current target air volume, when each speed value can make the swing mechanism be in the corresponding swing angle, the output air volume of the air outlet is 1600m³ / h. 3 / h.
[0034] It should be noted that the current target airflow is the result of setting the target airflow based on the airflow setting command generated by the user's airflow setting operation. In some implementations, the airflow setting command may originate from a host computer. The airflow setting command is generated based on the user's airflow setting operation on the host computer and sent to the MCU (Microcontroller Unit) of the air conditioning equipment. The host computer can be a remote control, wired controller, mobile terminal, or control panel located on the air conditioning equipment, etc.
[0035] In some implementations, establishing a mapping relationship for the current target airflow may include: using M parameter values of the swing angle parameter as target parameter values, where M is an integer greater than 2; adjusting the swing angle parameter of the swing mechanism to the target parameter value and controlling the fan to operate in a first constant airflow mode; after the operation of the fan in the air conditioning equipment makes the output airflow of the air conditioning equipment outlet constant at the current target airflow, obtaining the fan speed value, thereby obtaining the M parameter values of the swing angle parameter and the M speed values of the fan; and establishing a mapping relationship corresponding to the current target airflow based on the M parameter values and the fan speed value obtained under each parameter value.
[0036] In some implementations, controlling the fan of the air conditioning equipment to operate in a first constant air volume mode may include: collecting the actual characteristic value of a characteristic parameter and calculating the target characteristic value of the characteristic parameter once every time interval T1; adjusting the fan speed according to the relationship between the current collected actual characteristic value and the calculated target characteristic value; and finally making the actual characteristic value of the characteristic parameter equal to or approximately equal to the target characteristic value, thereby indirectly keeping the output air volume of the air outlet constant at the current target air volume.
[0037] Depending on the fan's structure, the actual adjustment rules for regulating the fan speed based on the relationship between the target characteristic value and the actual characteristic value vary. For centrifugal fans, adjusting the speed according to the relationship between the target and actual characteristic values includes: if the currently collected actual characteristic value is greater than the previously calculated target characteristic value, decreasing the fan speed; if the currently collected actual characteristic value is less than the currently calculated target characteristic value, increasing the fan speed. For axial fans, adjusting the speed according to the relationship between the target and actual characteristic values includes: if the currently collected actual characteristic value is greater than the currently calculated target characteristic value, increasing the fan speed; if the currently collected actual characteristic value is less than the currently calculated target characteristic value, decreasing the fan speed.
[0038] In some implementations, the fan speed can be closed-loop regulated based on the relationship between the target characteristic value and the actual characteristic value. This means that after each acquisition of the actual characteristic value and calculation of the target characteristic value, the deviation of the currently acquired actual characteristic value from the currently calculated target characteristic value is determined, and PI (proportional-integral) adjustment is applied to the deviation value to obtain the current vector and amplitude. The current vector and amplitude refer to the vector amplitudes of the d-axis current setpoint id* and the q-axis current setpoint iq*, respectively. Next, the actual characteristic value of the characteristic parameter is adjusted according to the current vector and amplitude so that after at least one adjustment, the actual characteristic value of the characteristic parameter is equal to or approximately equal to the target characteristic value. By adjusting the output capacity of the fan, closed-loop regulation of the fan speed is achieved, thereby realizing constant air volume control of the fan.
[0039] For example, the current vector and magnitude are processed by the MTPA (maximum torque per ampere) algorithm and converted into d-axis current setpoints and q-axis current setpoints. The d-axis and q-axis current setpoints are then controlled by FOC (Field-Oriented Control) to output an effective voltage vector to the fan motor, so that the fan motor adjusts its output capability according to the input effective voltage vector, which means adjusting the actual characteristic value.
[0040] In other implementations, after acquiring the current fan speed and the actual characteristic value of the characteristic parameter each time, the fan speed is adjusted in an open-loop manner. Taking a centrifugal fan as an example, if the currently acquired actual characteristic value is greater than the currently calculated target characteristic value, the fan speed is reduced by a fixed step size; if the currently acquired actual characteristic value is less than the currently calculated target characteristic value, the fan speed is increased by a fixed step size to reduce the difference between the actual characteristic value and the target characteristic value of the characteristic parameter. Taking an axial flow fan as an example, if the currently acquired actual characteristic value is greater than the currently calculated target characteristic value, the fan speed is increased by a fixed step size; if the currently acquired actual characteristic value is less than the currently calculated target characteristic value, the fan speed is reduced by a fixed step size, thereby achieving open-loop control of the fan speed.
[0041] Among them, the characteristic parameters can be any of the following parameters of the wind turbine: total power, total negative bus current, torque, magnitude of the vector sum of dq-axis currents, actual q-axis current (when using id=0 control), square of the magnitude of the vector sum of dq-axis currents, square of the magnitude of the vector sum of dq-axis voltages, and magnitude of the vector sum of dq-axis voltages.
[0042] It should be noted that the output air volume of the air conditioning equipment is constant at the current target air volume, which means that the output air volume of the air outlet is equal to or approximately equal to the current target air volume. In other words, the absolute value of the difference between the output air volume of the air outlet and the current target air volume is less than the preset difference threshold.
[0043] In some implementations, to obtain the fan speed value after the output airflow at the air conditioning unit's outlet has been stabilized at the current target airflow, the fan speed value can be acquired after adjusting the swing angle parameter to the target parameter value and waiting for a preset delay time. In other implementations, the fan speed value can be acquired after obtaining a feedback signal indicating that the output airflow has been stabilized at the current target airflow. It is understood that the feedback signal is generated when the fan speed is closed-loop adjusted based on the relationship between the actual characteristic value and the target characteristic value, so that the actual characteristic value is equal to or approximately equal to the target characteristic value.
[0044] In some implementations, the M parameter values are control parameter values used to control the swing mechanism to be at M swing angles, or they are the M swing angles of the swing mechanism.
[0045] In some implementations, the M swing angles can be derived by dividing the swing range of the swing mechanism at equal intervals. For example, if the swing range of the swing mechanism is 0° to 180°, and it is divided into M swing angles at 20° intervals, the resulting M swing angles are 0°, 20°, 40°, 60°, 80°, 100°, 120°, 140°, 160°, and 180°.
[0046] In some implementations, the mapping relationship established for the current target air volume is a discrete one-to-one correspondence between the swing angle parameter and the fan speed.
[0047] In some implementations, a discrete one-to-one correspondence between the swing angle parameter and the fan speed is established based on M parameter values and the fan speed value obtained under each parameter value. This may include: establishing a one-to-one correspondence between the M parameter values of the swing angle parameter and the M speed values of the fan speed to form a discrete data table.
[0048] In other implementations, a discrete one-to-one correspondence between the swing angle parameter and the fan speed is established based on M parameter values and the fan speed obtained for each parameter value. This can include: performing linear interpolation calculations based on the M parameter values and the fan speed obtained for each parameter value to obtain N parameter values for the swing angle parameter and N fan speed values; establishing a discrete one-to-one correspondence between M+N parameter values and M+N fan speed values to form a discrete data table. In implementations requiring linear interpolation, M can be equal to 3, meaning only the following three swing angles are measured: minimum swing angle, maximum swing angle, and a swing angle between the two. For example, only the speed values corresponding to 0°, 90°, and 180° are measured.
[0049] Taking the swing angle parameter as the swing angle of the swing mechanism as an example, the discrete one-to-one correspondence between the swing angle and the fan speed can be shown in Table 1 below:
[0050] Table 1. Discrete Correspondence between Swing Angle and Fan Speed
[0051] Swing angle Fan speed 0° Speed0 10° Speed1 20° Speed2 30° Speed3 …… …… Maximum swing angle Speedm
[0052] In some other implementations, a discrete one-to-one correspondence between the swing angle parameter and the fan speed is established based on M parameter values and the fan speed obtained under each parameter value. This may include: establishing multiple parameter intervals based on M parameter values or M+N parameter values, and establishing a discrete one-to-one correspondence between each parameter interval and the fan speed value.
[0053] In some implementations, the mapping relationship established for the current target air volume is a continuous curve relationship between the swing angle parameter and the fan speed. Establishing the continuous curve relationship based on M parameter values and the fan speed values obtained for each parameter value includes: performing curve fitting based on the M parameter values and the fan speed values obtained for each parameter value to obtain the continuous curve relationship between the swing angle parameter of the swing mechanism and the fan speed.
[0054] Taking the swing angle parameter as the swing angle of the swing mechanism as an example, curve fitting is performed based on M parameter values and the fan speed value obtained under each parameter value. This can be done by linear interpolation calculation using the minimum swing angle, the maximum swing angle, a specific swing angle between the two, and the corresponding speed values of these three to obtain multiple other swing angles and their corresponding speed values. Then, curve fitting is performed using each swing angle after linear interpolation and the speed value corresponding to each swing angle to obtain a continuous curve relationship.
[0055] S102: During the operation of the swing mechanism, the current parameter value of the swing angle parameter is obtained according to the preset control cycle.
[0056] In some implementations, the current parameter value of the swing angle parameter is obtained according to a preset control cycle, that is, the current parameter value of the swing angle parameter is detected once every T1 time interval. T1 is the preset control cycle, which is less than the preset swing cycle of the swing mechanism, so that the current parameter value of the swing angle parameter is obtained multiple times during the process of the swing angle of the swing mechanism changing from the minimum swing angle to the maximum swing angle.
[0057] In some implementations, the swing angle parameter can be directly the swing angle of the swing mechanism or a control parameter used to control the swing mechanism to perform cyclic swinging, such as the excitation steps of the stepper motor used to control the swing mechanism.
[0058] After obtaining the current parameter value of the swing angle parameter each time, step S103 is triggered for the current parameter value of the swing angle parameter obtained this time: obtain the target speed corresponding to the current parameter value according to the mapping relationship, and adjust the speed of the fan to the target speed.
[0059] In some implementations, if the mapping relationship corresponding to the current target air volume is a discrete data table that represents a discrete one-to-one correspondence between the swing angle parameter and the fan speed, the corresponding target speed is found from the discrete data table based on the current parameter value. Referring to Table 1 above, during the operation of the air conditioning equipment, the swing mechanism oscillates according to a preset swing cycle, and the current swing angle of the swing mechanism is obtained according to a preset control cycle. After obtaining the current swing angle each time, the target speed of the fan is obtained from the discrete data table based on the current swing angle: if the current swing angle of the swing mechanism is 0°, the target speed is adjusted to Speed0; as the swing angle gradually increases, if the current swing angle is 10°, the target speed is adjusted to Speed1; if the current swing angle is 20°, the target speed is adjusted to Speed2, and so on, until the current swing angle is at the maximum swing angle, at which point the target speed is adjusted to Speedm; as the swing angle gradually decreases, the target speed continues to be adjusted. If the current swing angle is 20°, the target speed is adjusted to Speed2; if the current swing angle is 10°, the target speed is adjusted to Speed1; if the current swing angle is 0°, the target speed is adjusted to Speed0.
[0060] Understandably, the preset control cycle can be the operating time corresponding to the angle difference between two adjacent swing angles in the mapping relationship. For example, if the angle difference between two adjacent swing angles is 10°, then the preset control cycle corresponds to the time required for the swing mechanism to operate 10°.
[0061] In other implementations, the preset control cycle can be less than the operating time corresponding to the angle difference between two adjacent swing angles. Then, for each acquired current parameter value, two adjacent mapping data are obtained from the mapping relationship based on the current parameter value, and linear interpolation calculation is performed based on the two adjacent data to obtain the target speed.
[0062] In other implementations, multiple parameter ranges are established based on M or M+N parameter values, and a discrete one-to-one correspondence is established between each parameter range and the fan speed. As the swing angle gradually increases, the target speed is set to the lower limit of any parameter range, and the speed corresponding to that range is taken as the target speed. Conversely, as the swing angle gradually decreases, the target speed is set to the upper limit of any parameter range, and the speed corresponding to that range is taken as the target speed.
[0063] If the mapping relationship established for the current target air volume is a continuous curve relationship between the swing angle parameter and the fan speed, then the relationship function corresponding to the continuous curve relationship is generated and saved. After each acquisition of the current parameter value, the current parameter value is input into the relationship function to calculate the target speed for the current control cycle.
[0064] Adjusting the fan speed to the target speed includes: adjusting the fan speed according to the relationship between the actual speed and the target speed; if the actual speed is greater than the target speed, reducing the fan speed; if the actual speed is less than the target speed, increasing the fan speed.
[0065] Through the above technical solution, during the operation of the swing mechanism, the target speed is directly obtained through the mapping relationship corresponding to the current target air volume. It is no longer necessary to calculate the target speed using PI based on the deviation between the actual characteristic value and the target characteristic value of the characteristic parameters collected in the preset control cycle. This ensures that within the preset swing cycle, the parameter value of the swing angle obtained in each control cycle is different, and the target speed obtained according to the mapping relationship is different. This achieves constant air volume control of the swing mechanism in the operating state, thereby avoiding the problem of the control cycle of constant air volume control being out of sync with the preset swing cycle, and thus avoiding the technical problem of unstable constant air volume control caused by this. It realizes constant air volume output in swing mode.
[0066] In some implementations, the method may further include: monitoring whether the current target air volume changes during the operation of the swing mechanism; if the current target air volume changes, establishing a mapping relationship for the changed target air volume.
[0067] In some implementations, if a command to shut down the swing function is detected during the operation of the swing mechanism, the swing mechanism is controlled to stop operating in response to the command, and the control fan is switched back to operate in the first constant air volume mode.
[0068] To facilitate understanding of the constant air volume control method provided by this invention, a control logic of the constant air volume control method provided by this invention is given:
[0069] S1: Control the fan to operate in the first constant air volume mode, and the swing mechanism does not work;
[0070] S2: During the operation of the fan in the first constant air volume mode, check whether a command to start the swing function is received. If so, proceed to step S3.
[0071] S3: Control the fan to continue operating in the first constant air volume mode, and adjust the swing angle of the swing mechanism to 0° and then fix it at 0°. The fan operates in the first constant air volume mode until the output air volume of the air outlet is constant to the current target air volume. Then record the speed value speed0 corresponding to the swing angle of 0°.
[0072] S4: Increase the swing angle of the swing mechanism to 10° and then fix it at 10°. The fan runs in the first constant air volume mode until the output air volume of the air outlet is constant at the current target air volume. Record the fan speed value speed1 corresponding to the swing angle of 10°. Continue in this manner until the speed value speedm corresponding to the maximum swing angle is recorded.
[0073] S5: Establish a mapping relationship based on different swing angles and corresponding rotation speed values;
[0074] S6: Control the fan to operate in the second constant air volume mode according to the mapping relationship, including: collecting the current swing angle of the swing mechanism every T1 time interval; after collecting the current swing angle each time, determining the target speed corresponding to the current swing angle according to the mapping relationship, and adjusting the fan speed to the target speed.
[0075] S7: During the process of controlling the fan to run in the second constant air volume mode according to the mapping relationship, is a command to shut down the swing function received? If yes, return to step S1. Is a command to adjust the target air volume received? If yes, reset the target air volume and return to step S3 with the new target air volume.
[0076] Based on the same inventive concept, this invention provides a constant air volume control device, such as... Figure 2 As shown, the constant air volume control device includes: a mapping establishment unit 201, used to establish a mapping relationship for the current target air volume, wherein the mapping relationship characterizes the relationship between the swing angle parameter and the fan speed under the current target air volume; a parameter acquisition unit 202, used to acquire the current parameter value of the swing angle parameter according to a preset control cycle during the operation of the swing mechanism; a speed acquisition unit 203, used to acquire the target speed corresponding to the current parameter value according to the mapping relationship; and a control execution unit 204, used to adjust the fan speed to the target speed.
[0077] In some implementations, the mapping establishment unit 201 is used to: control the fan to operate in a first constant air volume mode when the swing mechanism is in a stopped state; whether an activation command for the swing function of the air conditioning device is obtained, and if so, trigger the execution of the step of establishing a mapping relationship for the current target air volume.
[0078] In some embodiments, the mapping establishment unit is used to: take M parameter values of the swing angle parameter as target parameter values, where M is an integer greater than 2; adjust the swing angle parameter of the swing mechanism to the target parameter value, and control the fan to operate in a first constant air volume mode; after the operation of the fan makes the actual air volume at the air outlet of the air conditioning device meet the current target air volume, obtain the fan speed value; and establish the mapping relationship based on the M parameter values and the fan speed value obtained under each parameter value.
[0079] In some implementations, the M parameter values are used to control the swing mechanism to be in M swing angles in a one-to-one correspondence, and the M swing angles are the swing range of the swing mechanism divided at equal intervals.
[0080] In some implementations, the mapping establishment unit is used to: establish a discrete one-to-one correspondence between the M parameter values and the M speed values of the fan; or perform linear interpolation calculations based on the M parameter values and the speed values of the fan obtained under each parameter value to obtain N parameter values and N speed values of the fan, and establish a discrete one-to-one correspondence between the M+N parameter values and the M+N speed values of the fan, where N is a positive integer.
[0081] In some embodiments, the mapping establishment unit is used to: perform curve fitting based on the M parameter values and the fan speed value obtained under each parameter value, and establish a continuous curve relationship between the swing angle parameter of the swing mechanism and the fan speed.
[0082] In some embodiments, the constant air volume control device further includes: a monitoring unit for monitoring whether the target air volume changes during the operation of the swing mechanism; and a reconstruction unit for re-establishing the mapping relationship for the changed target air volume if a change in the target air volume is detected.
[0083] The specific functions of each functional unit in the above-mentioned device have been described in detail in the constant air volume control method provided in some embodiments of the present invention, and will not be elaborated here.
[0084] Based on the same inventive concept, embodiments of the present invention also provide an air conditioning device, which has a fan and an air outlet with an oscillation mechanism, such as... Figure 3 As shown, the air conditioning device further includes: a processor 302; and a memory 304 for storing executable instructions of the processor 302, wherein the processor 302 is configured to execute the instructions to implement the constant air volume control method described in any of the above embodiments.
[0085] Among them, Figure 3 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 306 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.
[0086] Based on the same inventive concept, the present invention provides a computer-readable storage medium having a computer program stored thereon, characterized in that the program, when executed by a processor, is the constant air volume control method described in any of the above embodiments.
[0087] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 Devices that specify the functions in one or more boxes.
[0088] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction device, which is implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0089] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0090] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0091] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
[0092] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.
Claims
1. A constant air volume control method, characterized in that, The method, applied to air conditioning equipment having a fan and an air outlet with an air swing mechanism, includes: Obtain the mapping relationship corresponding to the current target air volume, wherein the mapping relationship represents the relationship between the swing angle parameter and the fan speed under the current target air volume; During the operation of the swing mechanism, the current parameter value of the swing angle parameter is obtained according to a preset control cycle; The target rotational speed corresponding to the current parameter value is obtained according to the mapping relationship, and the rotational speed of the fan is adjusted to the target rotational speed.
2. The method as described in claim 1, characterized in that, The step of obtaining the mapping relationship corresponding to the current target air volume includes: The swing mechanism is in a stopped state, controlling the fan to operate in the first constant air volume mode; If a command to activate the swing function of the air conditioning device is received, then a mapping relationship is established for the current target air volume.
3. The method as described in claim 2, characterized in that, The establishment of a mapping relationship for the current target air volume includes: The M parameter values of the swing angle parameter are respectively used as target parameter values, where M is an integer greater than 2; Adjust the swing angle parameter of the swing mechanism to the target parameter value, and control the fan to operate in the first constant air volume mode; After the operation of the fan ensures that the actual air volume at the air outlet of the air conditioning equipment meets the current target air volume, the rotational speed of the fan is obtained. The mapping relationship is established based on the M parameter values and the fan speed values obtained under each parameter value.
4. The method as described in claim 3, characterized in that, The M parameter values are used to control the swing mechanism to be in M swing angles in a one-to-one correspondence. The M swing angles are the swing range of the swing mechanism divided at equal intervals.
5. The method as described in claim 3, characterized in that, The step of establishing the mapping relationship based on the M parameter values and the fan speed value obtained under each parameter value includes: Establish a discrete one-to-one correspondence between the M parameter values and the M speed values of the fan; or Linear interpolation is performed based on the M parameter values and the fan speed values obtained under each parameter value to obtain N parameter values and N fan speed values. A discrete one-to-one correspondence is established between the M+N parameter values and the M+N fan speed values, where N is a positive integer.
6. The method as described in claim 3, characterized in that, The step of establishing the mapping relationship based on the M parameter values and the fan speed value obtained under each parameter value includes: Based on the M parameter values and the fan speed values obtained under each parameter value, curve fitting is performed to establish a continuous curve relationship between the swing angle parameter of the swing mechanism and the fan speed.
7. The method as described in claim 2 or 3, characterized in that, The method further includes: During the operation of the swing mechanism, monitor whether the current target air volume changes; If a change in the current target air volume is detected, the mapping relationship is re-established for the changed target air volume.
8. A constant air volume control device, characterized in that, The constant air volume control device, applicable to air conditioning equipment with a fan and an air outlet with an air swing mechanism, includes: The mapping establishment unit is used to obtain the mapping relationship corresponding to the current target air volume, wherein the mapping relationship represents the relationship between the swing angle parameter and the fan speed under the current target air volume; The parameter acquisition unit is used to acquire the current parameter value of the swing angle parameter according to a preset control cycle during the operation of the swing mechanism. A rotational speed acquisition unit is used to acquire the target rotational speed corresponding to the current parameter value according to the mapping relationship; A control execution unit is used to adjust the speed of the fan to the target speed.
9. An air conditioning device, characterized in that, The device includes a fan and an air outlet with an air swing mechanism, and further includes: a processor; and a memory for storing executable instructions of the processor, wherein the processor is configured to execute the instructions to implement the constant air volume control method as described in any one of claims 1 to 7.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the constant air volume control method as described in any one of claims 1-7.