Air conditioning device

Abstract

The invention discloses an air conditioning device which comprises an air supply duct, a fan arranged at the end of the air supply duct and a controller connected with the fan. The controller is preset with a fan accumulative operation time threshold value, and is configured to accumulatively time the operation state of the fan and periodically judge whether the fan accumulative operation time reaches the fan accumulative operation time threshold value or not; if yes, static pressure automatic identification control is executed; if not, the static pressure automatic identification control is not executed; and the static pressure automatic identification control comprises the steps of identifying the static pressure value or the static pressure grade of the air supply duct and controlling the fan to operate according to the static pressure value or the static pressure grade obtained through identification. According to the air conditioning device, automatic static pressure recognition control is circularly executed according to the use condition in the use state, the rotating speed of the draught fan is controlled according to static pressure changes caused by use, the air supply amount of the air conditioning device is guaranteed, and the comfort of a user is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically to an air conditioning device. Background Technology

[0002] Currently, air conditioners that supply air through ducts perform static pressure self-identification during the initial installation and commissioning phase or after filter cleaning. This is used to adjust the fan speed based on the static pressure to meet airflow requirements. Specifically, during the initial installation and commissioning phase or after filter cleaning, a service engineer manually activates the static pressure self-identification function via a wired controller, which automatically configures the fan speed based on the identified static pressure value to meet the user's airflow needs. However, this method cannot automatically adjust for airflow changes caused by static pressure variations during air conditioner operation, affecting user comfort when static pressure fluctuates during air conditioner operation.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] To address the issue raised in the background art that changes in airflow caused by static pressure variations during air conditioner operation affect user comfort, this invention adds real-time duct static pressure self-identification control logic to the existing static pressure self-identification function, and configures the fan speed according to the identified static pressure value to achieve constant airflow control and improve user comfort.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: An air conditioning device includes an air supply duct, a fan disposed at the end of the air supply duct, and a controller connected to the fan; The controller is preset with a cumulative operating time threshold for the fan and is configured to cumulatively time the fan's operating status and periodically determine whether the cumulative operating time of the fan has reached the cumulative operating time threshold. If it has, then the static pressure automatic identification control is executed; if not, then the static pressure automatic identification control is not executed. The automatic static pressure identification and control includes identifying the static pressure value of the air supply duct and controlling the operation of the fan based on the identified static pressure value.

[0006] In some specific embodiments, a user operation panel is also included, which is communicatively connected to the controller and includes an operation module and a display module; The controller is also configured to control the display module to display confirmation of whether the static pressure automatic identification control is executed when the cumulative operating time of the fan reaches the cumulative operating time threshold of the fan; If the user confirms the execution of the operation module, then the static pressure automatic identification control is executed; If the user refuses to execute the operation module, the static pressure automatic identification control is abandoned, and when the power is turned on again after shutdown, the display module is controlled to display a confirmation of whether the static pressure automatic identification control was executed.

[0007] In some specific embodiments, the controller is further configured to control the air supply mode and set the fan speed to the highest level when performing the static pressure automatic identification control; and if the user changes the operating mode or fan speed level through the operation module when performing the static pressure automatic identification control, the static pressure automatic identification control is exited.

[0008] In some specific embodiments, the controller is further configured to not reset the cumulative operating time of the fan when the cumulative operating time of the fan reaches the cumulative operating time threshold of the fan and the static pressure automatic identification control has not been completed; and to reset the cumulative operating time of the fan to zero when the static pressure automatic identification control is completed.

[0009] In some specific embodiments, the controller pre-stores a data table, which includes the static pressure-power-speed correspondence of multiple static pressure values ​​within a preset static pressure range; The controller is configured such that the static pressure setpoint is equal to the initial static pressure value or the static pressure value obtained by executing the static pressure automatic identification control; the controller determines whether to execute the static pressure automatic identification control based on the deviation between the actual operating power of the fan and the power corresponding to the static pressure setpoint in the data table.

[0010] In some specific embodiments, each of the static pressure values ​​in the data table includes a minimum static pressure value, a maximum static pressure value, and static pressure values ​​arranged in ascending order between the minimum static pressure value and the maximum static pressure value; The controller is configured to, when the static pressure setpoint is equal to the minimum static pressure value, determine whether the actual operating power is less than a first ratio value multiple of the power corresponding to the minimum static pressure value in the data table and exceeds a first time limit value; the first ratio value is less than 1; if so, execute the automatic static pressure identification control. When the static pressure setpoint is equal to the maximum static pressure value, determine whether the actual operating power is greater than a second proportional value multiple of the power corresponding to the maximum static pressure value in the data table and exceeds a second time threshold; the second proportional value is greater than 1; if so, execute the automatic static pressure identification control. When the static pressure setpoint is between the minimum static pressure value and the maximum static pressure value, determine whether the actual operating power is higher than the power corresponding to the larger static pressure value adjacent to the static pressure setpoint in the data table and exceeds the third time limit, or lower than the power corresponding to the smaller static pressure value adjacent to the static pressure setpoint in the data table and exceeds the fourth time limit; if so, execute the automatic static pressure identification control.

[0011] In some specific embodiments, the first time limit is equal to the second time limit; the third time limit is equal to the fourth time limit; The first time limit is greater than the third time limit.

[0012] In some specific embodiments, at least one filter screen is also included, which is disposed at one or both ends of the air supply duct; It also includes a filter clogging detection module, which is connected to the controller and is used to detect the degree of clogging of the filter, obtain a clogging degree signal, and transmit it to the controller; The controller is configured to perform the static pressure automatic identification control when there is a sudden change in the received signals of the degree of dirt and blockage between two consecutive signals.

[0013] In some specific embodiments, at least one filter screen is also included, which is disposed at one or both ends of the air supply duct; It also includes a filter clogging detection module, which is connected to the controller and is used to detect the degree of clogging of the filter and transmit the obtained clogging degree signal to the controller; The controller is configured with a dirt clogging threshold and is configured to control the display module to display a cleaning reminder when the received dirt clogging level signal exceeds the dirt clogging threshold; When the operation module is operated to eliminate the cleaning reminder, the user operation panel controls the controller to perform the static pressure automatic identification control.

[0014] In some specific embodiments, the automatic static pressure identification control further includes: Obtain the actual operating power of the fan; The actual operating power is compared with each of the power values ​​in the data table, and the power with the smallest absolute value of the difference between the actual operating power and the power is set as the target power. The static pressure value corresponding to the target power in the data table is the identification static pressure value; The fan is controlled to operate at the speed corresponding to the identified static pressure value in the data table.

[0015] The air conditioning device of the present invention sets a threshold for the cumulative operating time of the fan and accumulates a timer for the fan's operating status. By comparing the cumulative operating time of the fan with the threshold, it realizes automatic static pressure identification control with the cumulative operating time of the fan as the cycle. This allows the air conditioning device to cyclically perform automatic static pressure identification control according to its usage, so that the fan speed is controlled according to the static pressure changes caused by usage, ensuring the air supply volume of the air conditioning device and improving the user's comfort experience.

[0016] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0017] 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 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 This is a schematic diagram of the control structure according to an embodiment; Figure 2 This is a schematic diagram of the control flow according to an embodiment; Figure 3 This is a schematic diagram of the control flow according to an embodiment; Figure 4 This is a schematic diagram of the control flow according to an embodiment; Figure 5 This is a schematic diagram of the control flow according to an embodiment; Figure 6 This is a schematic diagram of the control flow according to an embodiment; Figure 7 This is a schematic diagram of the control flow according to an embodiment; Figure 8 This is a schematic diagram of the control flow according to an embodiment; Figure 9 This is a schematic diagram of the control flow according to an embodiment; Figure 10 This is a schematic diagram of the control flow according to an embodiment; Figure 11 This is a schematic diagram of the control flow according to an embodiment; Figure 12 This is a schematic diagram of the control flow according to an embodiment. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0025] Air Conditioner Working Principle Air conditioners execute a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle involves a series of processes, including compression, condensation, expansion, and evaporation, to cool or heat an indoor space.

[0026] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0027] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0028] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0029] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0030] [This application] Reference Figure 1 , Figure 2 The air conditioning device of the present invention includes an air supply duct and a fan 2 disposed at the end of the air supply duct, for supplying air after heat exchange with the evaporator or condenser into the indoor space that needs temperature regulation, and for regulating the temperature of the indoor space.

[0031] Air conditioning units can be ducted air conditioning units or fresh air total heat exchange air conditioning units and other air conditioning units with air supply ducts.

[0032] The air conditioning unit also includes a controller 1, which is connected to the fan 2 and controls the operation of the fan 2. The controller 1 is preset with a cumulative fan operation time threshold S1 and is configured to accumulate the time of the fan 2's operation to obtain the cumulative fan operation time S2; and periodically determine whether the cumulative fan operation time has reached the cumulative fan operation time threshold S3; and if yes, then execute the static pressure automatic identification control S4; if no, then do not execute the static pressure automatic identification control.

[0033] The aforementioned automatic static pressure identification and control includes: Identify the static pressure value or static pressure level in the air supply duct, and obtain the identified static pressure value or identified static pressure level. The operation of fan 2 is controlled based on the obtained static pressure value or static pressure level. This primarily involves controlling fan 2 to operate at different speeds to adapt to the identified static pressure value or level, thereby achieving a constant airflow supply.

[0034] The air conditioning device of the present invention sets a threshold for the cumulative operating time of the fan and accumulates the time for the fan's operating state. By comparing the cumulative operating time of the fan with the threshold for the cumulative operating time of the fan, it realizes automatic static pressure identification control with the cumulative operating time threshold of the fan as the cycle. When the air conditioning device is in use, it cyclically performs automatic static pressure identification control according to its usage, so that the speed of the fan 2 is controlled according to the static pressure changes caused by use, ensuring the air supply volume of the air conditioning device and improving the user's comfort experience.

[0035] The specific control process and principle of the air conditioning device of the present invention will be described in detail below through specific embodiments.

[0036] In some specific embodiments, refer to Figure 1 , Figure 2 The cumulative operating time of the fan can be the cumulative time of the fan 2 operating at a specific speed. For example, the operating time of the fan 2 is only accumulated when the fan 2 is operating at a high wind speed or at both high and extra-high wind speeds; the operating time is not accumulated when the fan 2 is operating at medium or low wind speeds.

[0037] This embodiment ignores the impact of low and medium speeds of fan 2 on static pressure changes. For example, the air volume is small at low and medium speeds of fan 2, and its contribution to filter clogging is negligible.

[0038] Of course, the cumulative operating time of the fan can also be the cumulative time of the fan 2 operating at various wind speeds. Specifically, the cumulative operating time of the fan is the sum of the cumulative time of the fan 2 at the high wind speed, or the sum of the cumulative time of the high wind speed and the super high wind speed, and the sum of the fractional multiples of the cumulative time of the medium and low wind speeds, where the fraction is less than 1, thereby improving the accuracy and precision of the static pressure automatic identification control performed on a cycle based on the cumulative operating time of the fan.

[0039] In some specific embodiments, refer to Figure 1 , Figure 3 The air conditioning unit also includes a user control panel 3, which is communicatively connected to the controller 1 and includes an operation module and a display module. The operation module is used by the user to input information such as changing the operating mode, setting the temperature, or adjusting the air supply speed. The display module displays the operating status of the air conditioning unit and the changes and adjustments input by the user through the operation module.

[0040] The air conditioning unit can be a ducted air conditioner or a fresh air total heat exchange air conditioner, including an indoor unit, an outdoor unit, and a wired controller; the controller 1 is located in the indoor unit, and the wired controller is the user operation panel 3.

[0041] When controller 1 is configured to perform automatic static pressure identification control, it first controls the unit to operate in air supply mode, and the air supply speed is at the highest level. That is, controller 1 is configured with multiple air speed levels, and the user can select one of the air speed levels through the user operation panel 3 to control the fan 2 to operate at the set air speed to meet the user's air volume requirements; when the static pressure is automatically identified and controlled, the fan 2 operates at the highest speed among the various air speed levels.

[0042] The controller 1 is also configured to display a flag indicating whether static pressure automatic identification control confirmation is performed when the cumulative operating time of the fan reaches the cumulative operating time threshold S3; the flag indicating whether static pressure automatic identification control confirmation is performed can be an indicator light or an image.

[0043] If the user operation module confirms the execution of static pressure automatic identification control S5, then the controller 1 executes static pressure automatic identification control S4; if the user operation module rejects the execution of static pressure automatic identification control, then the controller 1 abandons the execution of static pressure automatic identification control and determines whether to shut down the machine before shutting it down S6; if so, it returns to the confirmation of whether to execute static pressure automatic identification control S5.

[0044] Confirmation and rejection control of the operation module can be achieved through the confirmation and rejection buttons of the operation module, or through a combination of buttons of the operation module; when the operation module and the display module are integrated into a touch screen, the indicator for whether to perform static pressure automatic identification control is an image; confirmation and rejection of static pressure automatic identification control are performed by touch screen buttons.

[0045] In this embodiment, the air conditioning device confirms whether to execute automatic static pressure identification control when the cumulative fan operating time reaches a threshold. This prevents the unit from suddenly changing its operating mode during operation, which could affect user comfort and experience. After manual confirmation by the user, the automatic static pressure identification control is executed at an appropriate time to meet user expectations, thus improving the user experience.

[0046] In some specific embodiments, refer to Figure 4 , Figure 5 The controller 1 is also configured to exit the static pressure automatic identification control if the user changes the unit's operating mode or the fan speed setting of the fan 2 through the operation module when the static pressure automatic identification control is executed.

[0047] That is, when the unit is performing static pressure automatic identification control, if the user has a need to change the operating mode or the fan speed setting, the static pressure automatic identification control will be terminated, and the user's current air conditioning function will be prioritized.

[0048] In other words, when the unit is ready to execute static pressure automatic identification control but has not changed the operating mode to air supply mode and the fan speed to the highest level, if the user has a need to change the operating mode and the fan speed, the static pressure automatic identification control will also be terminated, and the user's current air conditioning function will be prioritized.

[0049] In this embodiment, the air conditioning device sets user needs as high priority during the static pressure automatic identification and control process, thereby improving user comfort and user experience.

[0050] In some specific embodiments, refer to Figure 6 The controller 1 is also configured to execute static pressure automatic identification control S4 when the cumulative operating time of the fan reaches or exceeds the cumulative operating time threshold of the fan and determine whether it is completed S7; if the static pressure automatic identification control is not completed, the cumulative operating time of the fan is not cleared S82, and the cumulative timing continues; when the static pressure automatic identification control is completed, the cumulative operating time of the fan is cleared and the cumulative timing starts again S81.

[0051] In some specific embodiments, refer to Figure 7 , Figure 8 The controller 1 has a pre-stored data table, which includes the correspondence between multiple static pressure values ​​within a preset range and the fan power and fan speed, to meet the requirement of providing the set air volume. That is, the data table includes the correspondence between static pressure, power and speed to meet the requirement of providing the set air volume.

[0052] After the air conditioning unit is installed according to the predetermined static pressure, the initial static pressure value S10 is obtained through actual measurement; the controller 1 sets the static pressure setpoint to be equal to the initial static pressure value S20; and controls the initial speed S30 of the fan 2 according to the initial static pressure value. The controller also controls the fan operation based on the power and speed corresponding to the initial static pressure value from a pre-stored data table.

[0053] The controller 1 is also configured to perform automatic static pressure identification control S40; the static pressure setpoint is equal to the identified static pressure value S50, and the fan 2 is controlled to operate according to the power and speed corresponding to the static pressure in the data table S60.

[0054] The static pressure automatic identification control also determines whether to execute based on the deviation between the actual operating power of fan 2, which is acquired in real time during unit operation, and the power corresponding to the static pressure setpoint in the data table. That is, it acquires the actual operating power of fan 2 in real time and the power corresponding to the static pressure setpoint in the data table (S70); calculates the deviation between the actual operating power and the power obtained from the data table (S80); and determines whether to execute the static pressure automatic identification control based on the magnitude of the deviation (S90).

[0055] The air conditioning device in this embodiment sets the system based on the relationship between the actual operating power of the fan 2 and the static pressure. It determines whether the static pressure in the duct has changed based on the deviation of the actual operating power from the static pressure set value, and then determines whether to perform automatic static pressure identification control. This allows the operation of the fan 2 to adapt to the changed static pressure, so that the air volume provided does not change significantly, achieving constant air volume operation and improving user comfort.

[0056] In some specific embodiments, refer to Figure 9 The static pressure values ​​in the data table include the minimum static pressure value, the maximum static pressure value, and multiple static pressure values ​​between the minimum and maximum static pressure values, arranged in ascending order. The minimum static pressure value is located at the beginning of the table, and the maximum static pressure value is located at the end.

[0057] Controller 1 is configured to, when the static pressure setpoint is the minimum static pressure value, cyclically acquire the actual operating power and determine whether the acquired actual operating power is less than a first proportional value multiple of the power corresponding to the minimum static pressure value in the data table and exceeds a first time limit; the first proportional value is less than 1; if yes, then automatic static pressure identification control is executed; if no, then automatic static pressure identification control is not executed. That is, when the static pressure setpoint is equal to the minimum static pressure value, the actual operating power of fan 2 is cyclically acquired and the power corresponding to the minimum static pressure value in the data table is acquired; the product of the above power and the first proportional value is calculated; it is determined whether the actual operating power is less than the product of the power and the first proportional value for multiple cycles; if yes, then automatic static pressure identification control is executed; if no, then automatic static pressure identification control is not executed; the sum of the times for each cycle is the first time limit to prevent misjudgment.

[0058] When the static pressure setpoint is the highest static pressure value, the actual operating power of fan 2 is cyclically acquired, and it is determined whether the acquired actual operating power is greater than the second proportional value of the power corresponding to the highest static pressure value in the data table and exceeds the second time threshold; the second proportional value is greater than 1; if so, automatic static pressure identification control is executed; if not, automatic static pressure identification control is not executed. That is, when the static pressure setpoint is equal to the highest static pressure value, the actual operating power of fan 2 and the power corresponding to the highest static pressure value in the data table are cyclically acquired; the product of the above power and the second proportional value is calculated; it is determined whether the actual operating power is greater than the product of the power and the second proportional value for multiple cycles; if so, automatic static pressure identification control is executed; if not, automatic static pressure identification control is not executed; the sum of the times of each cycle is the second time limit to prevent misjudgment.

[0059] When the static pressure setpoint is between the minimum and maximum static pressure values, the actual operating power of fan 2 is cyclically acquired, and it is determined whether the acquired actual operating power is higher than the power corresponding to the larger static pressure value adjacent to the static pressure setpoint in the data table and exceeds the third time limit, or lower than the power corresponding to the smaller static pressure value adjacent to the static pressure setpoint in the data table and exceeds the fourth time limit. If yes, automatic static pressure identification control is executed; otherwise, automatic static pressure identification control is not executed. That is, when the static pressure setpoint is greater than the minimum static pressure value and less than the maximum static pressure value, the actual operating power of fan 2 is cyclically acquired, and the power corresponding to the two static pressure values ​​adjacent to the static pressure setpoint in the data table is acquired. The power corresponding to static pressure greater than the static pressure setpoint is high power; the power corresponding to static pressure less than the static pressure setpoint is low power. It is determined whether the actual operating power is higher than the high power and exceeds the third time limit, or lower than the low power and exceeds the fourth time limit. If yes, automatic static pressure identification control is executed; otherwise, automatic static pressure identification control is not executed. The third and fourth time limits are the sum of the times of multiple cyclic cycles.

[0060] The air conditioning device in this embodiment determines whether to perform automatic static pressure identification control based on the deviation between the actual operating power and the power corresponding to the static pressure setpoint in the data table or the power corresponding to the static pressure adjacent to the static pressure setpoint. This improves the matching degree between the fan speed and the static pressure value of the air duct, ensures a constant air volume supply, and enhances user comfort.

[0061] In some specific embodiments, the first time limit is equal to the second time limit; the third time limit is equal to the fourth time limit; and the first time limit is greater than the third time limit.

[0062] In some specific embodiments, the first time limit and the second time limit are 2 minutes; the third time limit and the fourth time limit are 1 minute.

[0063] In some specific embodiments, refer to Figure 6 The controller 1 is also configured to, when it is determined that the static pressure automatic identification control is to be executed based on the deviation of the actual operating power and the static pressure automatic identification control has not been completed, not to reset the cumulative operating time of the fan, but to continue to accumulate the time; and when the static pressure automatic identification control is completed, even if the cumulative operating time of the fan has not reached or exceeded the threshold of the cumulative operating time of the fan, the cumulative operating time of the fan is reset to zero and the time is re-accumulated.

[0064] In some specific embodiments, refer to Figure 1 , Figure 10 The air conditioning unit also includes at least one filter, which is disposed at one or both ends of the air duct for filtering the airflow.

[0065] The air conditioning unit also includes a filter clogging detection module 4, which is connected to the controller 1 and is used to cyclically detect the degree of filter clogging, obtain the degree of clogging signal, and transmit it to the controller S100. The controller 1 is configured to execute static pressure automatic identification control S300 when the degree of clogging obtained from two adjacent detections changes abruptly S200.

[0066] In this embodiment, the air conditioning device determines whether to perform automatic static pressure identification control by judging whether the filter clogging degree signal changes abruptly. This solves the problem of large objects clogging the filter and the static pressure changes caused by filter cleaning, which require corresponding changes in the speed of the fan 2. In particular, when there are large static pressure changes caused by filter cleaning, the speed of the fan 2 is changed to improve efficiency and user comfort.

[0067] In some specific embodiments, refer to Figure 1 , Figure 11 The air conditioning unit also includes at least one filter, which is disposed at one or both ends of the air duct for filtering the airflow.

[0068] The air conditioning unit also includes a filter clogging detection module 4, which is connected to the controller 1 and is used to cyclically detect the degree of clogging of the filter, obtain the degree of clogging signal, and transmit it to the controller S500.

[0069] Controller 1 is configured with a clogging threshold S400, and is further configured to control the display module to display a cleaning reminder S700 when the received clogging level signal exceeds or reaches the clogging threshold S600, thus reminding the user to clean the filter. Specifically, when the clogging level signal received by controller 1 exceeds or reaches the clogging threshold, it sends a filter cleaning signal to the user operation panel 3; the user operation panel 3 also includes a panel controller, which is connected to the operation module and the display module; after receiving the filter cleaning signal, the panel controller controls the display module to display the cleaning reminder.

[0070] When the operation module clears the cleaning reminder (S800), the user operation panel 3 controls the controller 1 to execute the static pressure automatic identification control (S900). That is, when the filter screen is cleaned and the operation module clears the cleaning reminder, the user operation panel 3 sends a filter screen cleaned signal to the controller 1; when the controller 1 receives the filter screen cleaned signal, it executes the static pressure automatic identification control.

[0071] The air conditioning device in this embodiment determines whether the filter has been cleaned based on the signal sent by the user operation panel 3, so that it can obtain the filter status more promptly. It can also obtain the current actual static pressure value through static pressure automatic identification control, and then set the actual static pressure value as the static pressure set value and control the fan 2 to operate according to the current static pressure set value, thereby improving efficiency and user comfort.

[0072] In some specific embodiments, refer to Figure 12 The specific control process for automatic static pressure identification control includes: S41. Control the unit to operate in air supply mode and adjust the fan speed to the highest level; S42. Obtain the actual operating power of the fan; S43. Compare the actual operating power with the power values ​​in the data table, and obtain the power with the smallest absolute value of the difference between the actual operating power and the power value, and set it as the target power. S44. Obtain the static pressure value corresponding to the target power in the data table, which is the identification static pressure value; S45. Set the identified static pressure value as the static pressure setpoint; obtain the rotational speed corresponding to the static pressure setpoint in the data table; control the fan to operate at the obtained rotational speed.

[0073] The correspondence between static pressure, power, and rotational speed in the data table was obtained through experiments.

[0074] The air conditioning device in this embodiment identifies the current static pressure by using the actual operating power and data table, and controls the operating speed of the fan according to the identified static pressure and data table, resulting in high control efficiency.

[0075] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0076] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning device characterized by comprising: The air supply duct, the fan arranged at the end of the air supply duct, and the controller connected with the fan; The controller is preset with a fan cumulative running time threshold value, and is configured to accumulate the running state of the fan and periodically determine whether the fan cumulative running time reaches the fan cumulative running time threshold value; If yes, the static pressure automatic identification control is executed; if no, the static pressure automatic identification control is not executed; The static pressure automatic identification control comprises identifying the static pressure value of the air supply duct and controlling the running of the fan according to the identified static pressure value.

2. The air conditioning apparatus according to claim 1, wherein Further comprising a user operation panel in communication connection with the controller, comprising an operation module and a display module; The controller is further configured to control the display module to display the confirmation of whether to execute the static pressure automatic identification control when the fan cumulative running time reaches the fan cumulative running time threshold value; If the user operates the operation module to confirm execution, the static pressure automatic identification control is executed; If the user operates the operation module to refuse execution, the static pressure automatic identification control is abandoned, and the display module is controlled to display the confirmation of whether to execute the static pressure automatic identification control after the next power-on after power-off.

3. The air conditioning apparatus according to claim 2, wherein The controller is further configured to control the running of the air supply mode and the wind speed gear to be the highest gear when the static pressure automatic identification control is executed; and when the static pressure automatic identification control is executed, if the user changes the running mode or the wind speed gear through the operation module, the static pressure automatic identification control is exited.

4. The air conditioning apparatus according to claim 3, wherein The controller is further configured to not clear the fan cumulative running time when the fan cumulative running time reaches the fan cumulative running time threshold value and the static pressure automatic identification control is not executed; and clear the fan cumulative running time when the static pressure automatic identification control is executed.

5. The air conditioning apparatus according to any one of claims 2 to 4, wherein The controller pre-stores a data table comprising the static pressure-power-speed corresponding relationship of a plurality of static pressure values in a preset static pressure range; The controller is configured to set the static pressure set value to be equal to the initial static pressure value or the static pressure value identified by the static pressure automatic identification control; and determine whether to execute the static pressure automatic identification control according to the deviation between the actual running power of the fan and the corresponding power of the static pressure set value in the data table.

6. The air conditioning apparatus according to claim 5, wherein Each of the static pressure values in the data table comprises a lowest static pressure value, a highest static pressure value, and each of the static pressure values arranged in order from small to large between the lowest static pressure value and the highest static pressure value; The controller is configured to determine whether the actual running power is less than the first proportional value times the power corresponding to the lowest static pressure value in the data table and exceeds a first time limit value when the static pressure set value is equal to the lowest static pressure value; The first proportional value is less than 1; If yes, the static pressure automatic identification control is executed; The controller is configured to determine whether the actual running power is greater than the second proportional value times the power corresponding to the highest static pressure value in the data table and exceeds a second time threshold value when the static pressure set value is equal to the highest static pressure value; The second proportional value is greater than 1; If yes, the static pressure automatic identification control is executed; When the static pressure set value is between the minimum static pressure value and the maximum static pressure value, it is determined whether the actual operating power is higher than the power corresponding to the larger static pressure value adjacent to the static pressure set value in the data table and exceeds a third time limit value, or is lower than the power corresponding to the smaller static pressure value adjacent to the static pressure set value in the data table and exceeds a fourth time limit value; if so, the static pressure automatic identification control is performed.

7. The air conditioning apparatus according to claim 6, wherein The first time limit value is equal to the second time limit value; and the third time limit value is equal to the fourth time limit value. The first time limit value is greater than the third time limit value.

8. The air conditioning apparatus according to claim 5, wherein The air supply duct further comprises at least one filter screen arranged at one end or both ends of the air supply duct. The air supply duct further comprises a filter screen clogging detection module connected to the controller and configured to detect the clogging degree of the filter screen and transmit a clogging degree signal to the controller. The controller is configured to perform the static pressure automatic identification control when the clogging degree signals received at two adjacent times change abruptly.

9. The air conditioning apparatus according to claim 5, wherein The air supply duct further comprises at least one filter screen arranged at one end or both ends of the air supply duct. The air supply duct further comprises a filter screen clogging detection module connected to the controller and configured to detect the clogging degree of the filter screen and transmit a clogging degree signal to the controller. The controller is configured with a clogging threshold value and is configured to control the display module to display a cleaning reminder when the received clogging degree signal exceeds the clogging threshold value. When the operation module is operated to eliminate the cleaning reminder, the user operation panel controls the controller to perform the static pressure automatic identification control.

10. The air conditioning apparatus according to claim 5, wherein The static pressure automatic identification control further comprises: obtaining the actual operating power of the fan; comparing the actual operating power with each power in the data table, and setting the power with the minimum absolute value of the difference from the actual operating power as a target power; the static pressure value corresponding to the target power in the data table is an identified static pressure value; controlling the fan to operate at a speed corresponding to the identified static pressure value in the data table.

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