Indoor unit control method, device and air conditioner

Abstract

This invention provides an indoor unit control method, device, and air conditioner. The method includes: determining a target rotation speed based on the current coil temperature; controlling the indoor unit to adjust its rotation speed based on the target rotation speed, so that the indoor unit can continuously operate at the adjusted rotation speed for a first preset time; if it is determined that the next coil temperature is in a first range, controlling the indoor unit to reduce the fan speed based on the adjusted rotation speed; if it is determined that the next coil temperature is in a second range, controlling the indoor unit to increase the fan speed based on the adjusted rotation speed. The indoor unit control method, device, and air conditioner provided by this invention analyze the system pressure value based on the coil temperature and adjust the indoor unit's fan speed accordingly, so that the coil temperature under high-temperature self-cleaning mode is always maintained within the normal temperature range, ensuring that the outlet air temperature is stable at 56°C, improving the efficiency of high-temperature self-cleaning, and avoiding shutdown caused by sudden increases or decreases in system pressure due to unilaterally maintaining the outlet air temperature by adjusting the frequency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and in particular to an indoor unit control method, device, and air conditioner. Background Technology

[0002] 56℃ is the temperature at which viruses are inactivated. Similarly, 56℃ is the safe temperature for high-temperature sterilization in self-cleaning air conditioners. The high-temperature self-cleaning process includes: during self-cleaning, the surface of the evaporator coils rapidly cools down to frost, peeling off bacteria, dust, and other particles; then it rapidly heats up (above 56℃) to defrost, turning the frost into water to wash away bacteria and dust. Continuing to operate at this temperature can effectively kill related pathogens, achieving a sterilization rate of up to 99%.

[0003] However, when the air conditioner is in the defrosting stage, the indoor unit rotates at a low speed and has a high frequency, resulting in a higher system pressure. This is usually adjusted by increasing or decreasing the frequency, which can easily cause a sudden increase in system pressure, leading to overcurrent protection and other forms of system pressure-induced shutdown, thus affecting the user experience. Summary of the Invention

[0004] This invention provides an indoor unit control method, device, and air conditioner to solve the defects in the prior art where the system pressure cannot be determined during the defrosting stage, and the system pressure is too high and the unit shuts down due to the reliance on frequency adjustment alone.

[0005] This invention provides an indoor unit control method, comprising:

[0006] Determine the target rotation speed based on the current coil temperature;

[0007] Based on the target rotation speed, the indoor unit is controlled to adjust its rotation speed so that the indoor unit can run continuously at the adjusted rotation speed for a first preset time.

[0008] If the temperature of the next coil is determined to be in the first range, the indoor unit is controlled to reduce the fan speed based on the adjusted speed.

[0009] If it is determined that the temperature of the next coil is in the second range, the indoor unit is controlled to increase the fan speed based on the adjusted speed.

[0010] The current coil temperature is obtained when the air conditioner is in high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has been running at the adjusted speed for a first preset time; the first interval and the second interval are determined by the normal temperature range of the coil in the high-temperature self-cleaning mode.

[0011] According to an indoor unit control method provided by the present invention, if it is determined that the next coil temperature is in a first range, controlling the indoor unit to reduce the fan speed based on the adjusted speed includes:

[0012] Based on the first target sub-range corresponding to the next coil temperature, obtain the first rotational speed change corresponding to the first target sub-range;

[0013] Based on the first change in rotation speed, the indoor unit is controlled to reduce the fan speed based on the adjusted rotation speed.

[0014] Wherein, the first target sub-interval is obtained by dividing the first interval into intervals; the first speed change is less than zero.

[0015] According to an indoor unit control method provided by the present invention, the step of controlling the indoor unit to reduce the fan speed based on the first speed change includes:

[0016] Within a second preset time period, the indoor unit is controlled to reduce the fan speed based on the adjusted speed according to the first speed change, so that the indoor unit can continue at the reduced fan speed for the second preset time period.

[0017] Wherein, the second preset duration is greater than the third preset duration.

[0018] According to an indoor unit control method provided by the present invention, if it is determined that the temperature of the next coil is in a second range, controlling the indoor unit to increase the fan speed based on the adjusted speed includes:

[0019] Based on the second target sub-range corresponding to the next coil temperature, obtain the second rotational speed change corresponding to the second target sub-range;

[0020] Based on the second speed change, the indoor unit is controlled to increase the fan speed on the basis of the adjusted speed.

[0021] The second target sub-interval is obtained by dividing the second interval; the second speed change is greater than zero.

[0022] According to an indoor unit control method provided by the present invention, the step of controlling the indoor unit to increase the fan speed based on the second speed change amount includes:

[0023] Within a fourth preset time period, the indoor unit is controlled to increase the fan speed based on the adjusted speed according to the second speed change, so that the indoor unit can maintain the increased fan speed for a fifth preset time period.

[0024] The fourth preset duration is longer than the fifth preset duration.

[0025] According to an indoor unit control method provided by the present invention, the step of controlling the indoor unit to adjust its speed based on the target speed includes:

[0026] If the target rotational speed is determined to be greater than or equal to the rated maximum rotational speed of the indoor unit, the indoor unit is controlled to adjust the fan speed to the maximum rotational speed.

[0027] The present invention also provides an indoor unit control device, comprising:

[0028] The speed determination module is used to determine the target speed based on the current coil temperature;

[0029] The initial control module is used to control the indoor unit to adjust its speed based on the target speed, so that the indoor unit can run continuously at the adjusted speed for a first preset time.

[0030] The first subsequent control module is used to control the indoor unit to reduce the fan speed based on the adjusted speed if it is determined that the next coil temperature is in the first range.

[0031] The second subsequent control module is used to control the indoor unit to increase the fan speed based on the adjusted speed if it is determined that the temperature of the next coil is in the second range.

[0032] The current coil temperature is obtained when the air conditioner is in high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has been running at the adjusted speed for a first preset time; the first interval and the second interval are determined by the normal temperature range of the coil in the high-temperature self-cleaning mode.

[0033] The present invention also provides an air conditioner, including an indoor unit and an outdoor unit, wherein the indoor unit is provided with a control processor and a sensing module, the sensing module being disposed at the coil of the indoor unit; it also includes a memory and a program or instructions stored in the memory and executable on the control processor, wherein when the program or instructions are executed by the control processor, the indoor unit control method described above is performed.

[0034] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the indoor unit control method as described above.

[0035] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the indoor unit control method as described above.

[0036] The indoor unit control method, device, and air conditioner provided by this invention are based on the initial control of adjusting the indoor unit's speed to a target speed determined by the current coil temperature. After continuously operating in this state for a first preset time, the system decides to increase or decrease the indoor unit's fan speed by continuously monitoring the next coil temperature. This achieves the analysis of system pressure values ​​based on coil temperature and the adaptive adjustment of the indoor unit's fan speed, ensuring that the coil temperature under high-temperature self-cleaning mode is always maintained within the normal temperature range. This ensures that the outlet air temperature is stable at 56°C, improves the efficiency of high-temperature self-cleaning, and avoids sudden increases or decreases in system pressure caused by unilaterally maintaining the outlet air temperature through frequency adjustment, which could lead to system shutdown. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this 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 this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a flowchart illustrating the indoor unit control method provided by the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the indoor unit control device provided by the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the air conditioner provided by the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more.

[0043] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms.

[0044] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0045] Figure 1 This is a flowchart illustrating the indoor unit control method provided by the present invention. Figure 1 As shown, the indoor unit control method provided in this embodiment of the invention includes: step 101, determining the target speed based on the current coil temperature.

[0046] The current coil temperature was obtained when the air conditioner was in high-temperature self-cleaning mode.

[0047] It should be noted that the execution subject of the indoor unit control method provided in this embodiment of the invention is the indoor unit control device.

[0048] The application scenario of the indoor unit control method provided in this embodiment of the invention is that when the user activates the high temperature self-cleaning mode of the air conditioning system, the fan speed of the indoor unit is adaptively compensated by the real-time feedback of the coil temperature from the sensing module, so as to balance the operating frequency of the indoor unit with that of the outdoor unit, thereby reducing the system pressure of the air conditioning and ensuring that the outlet air temperature is stably maintained above 56 degrees Celsius.

[0049] The sensing module periodically collects the coil temperature of the indoor unit at specified time intervals and sends the coil temperature to the indoor unit control device. This embodiment of the invention does not specifically limit the working cycle of the sensing module.

[0050] Optionally, the sensor module can perform data acquisition operations at a default work cycle.

[0051] Optionally, the user can issue a cycle change command, causing the sensing module to receive and respond to the command, changing the working cycle to the cycle indicated by the command for data acquisition.

[0052] It should be noted that before step 101, the user needs to send an activation command through the transmission medium to activate the high-temperature self-cleaning mode of the air conditioning system, so that the air conditioning system enters the default frosting stage and defrosting stage in sequence, removing dust particles and bacteria attached to the inside of the indoor unit.

[0053] Optionally, the user can transmit activation commands through the control device and the air conditioning system via wireless communication to initialize the high-temperature self-cleaning mode of the air conditioning system.

[0054] Optionally, users can issue an activation command via voice interaction. The air conditioning system receives the activation command, performs voice recognition, and initializes the high-temperature self-cleaning mode.

[0055] Specifically, in step 101, after the indoor unit control device determines that the air conditioner is starting the high-temperature self-cleaning mode based on the operating information fed back by each component according to the activation command, it uses the coil temperature collected by the sensor module in the current working cycle to calculate the corresponding target speed.

[0056] The target rotational speed is the initial target value of the fan speed in the indoor unit. This embodiment of the invention does not specifically limit its calculation method.

[0057] Optionally, the mapping relationship between coil temperature and fan speed can be pre-stored in the indoor unit control device. By determining the current coil temperature, the corresponding target speed can be obtained through this mapping relationship.

[0058] Optionally, the current coil temperature can be input into the mathematical model to calculate the target rotational speed, and the calculation formula is as follows:

[0059]

[0060] in, The target rotational speed is Pn, and the current coil temperature is Pn. targe The ideal coil temperature is given by , k is the temperature-speed conversion coefficient, and b is the speed constant.

[0061] For example, Pn targe The sterilization temperature is the same as that of the high-temperature self-cleaning mode, which is 56℃. k can be 10, and b can be 500.

[0062] Step 102: Based on the target speed, control the indoor unit to adjust its speed so that the indoor unit can run continuously at the adjusted speed for a first preset time.

[0063] It should be noted that the first preset duration refers to the duration for which the indoor unit's fan will continue to operate at the initial target value in high-temperature self-cleaning mode.

[0064] Specifically, in step 102, the indoor unit control device encapsulates the target speed obtained in step 101 and the corresponding first preset duration of continuous operation into an initial control command, and sends the command to the indoor unit.

[0065] The embodiments of the present invention do not specifically limit the value of the first preset duration. For example, the first preset duration can be 5 minutes.

[0066] The indoor unit receives and responds to the initial control command, adjusts the speed of its internal fan to the target speed, and runs at that speed for 5 minutes to initially match the fan speed with the current compression load of the outdoor unit. This avoids the high system pressure caused by the low fan speed of the indoor unit and the high operating frequency of the outdoor unit during the initial defrosting stage of the high-temperature self-cleaning mode, which could easily lead to high-load shutdown.

[0067] Step 103-1: If it is determined that the temperature of the next coil is in the first range, control the indoor unit to reduce the fan speed based on the adjusted speed.

[0068] The next coil temperature is the coil temperature after the indoor unit has been running at the adjusted speed for a first preset time. The first range is determined by the normal temperature range of the coil in high-temperature self-cleaning mode.

[0069] It should be noted that the next coil temperature refers to the coil temperature collected by the sensing module within the corresponding cycle after the indoor unit's fan has been running continuously at the target speed for a first preset period of time.

[0070] The first interval refers to the interval formed by the lower limit of the normal temperature range of the coil under high temperature self-cleaning mode.

[0071] For example, in high-temperature self-cleaning mode, if the air outlet temperature during the defrosting stage is 56°C, then the normal temperature range corresponding to the coil is between 56°C and 61°C. Therefore, the first interval can be [-∞, 56°C).

[0072] Specifically, in step 103-1, the outdoor unit's control device compares the next coil temperature obtained after the initial speed adjustment in step 102 with the normal temperature range of the coil under high-temperature self-cleaning mode. If it is determined that the value is within the first range, a speed reduction control command is sent to the indoor unit.

[0073] Based on the speed updated in the initial speed adjustment, since the heat carried away by the indoor unit's fan speed is relatively higher than the heat generated by the outdoor unit's compressor, its system pressure value is lower, resulting in a lower coil temperature and poor defrosting effect. Therefore, the indoor unit receives and responds to the speed reduction control command, reducing the speed of its internal fan. By reducing the airflow, the heat exchange process is slowed down, allowing the coil temperature to gradually rise back to the normal temperature range. During subsequent operation, the outlet air temperature is always maintained at 56℃.

[0074] Step 103-2: If it is determined that the temperature of the next coil is in the second range, control the indoor unit to increase the fan speed based on the adjusted speed.

[0075] The first coil temperature is the coil temperature after the indoor unit has been running at the adjusted speed for a first preset time. The second range is determined by the normal temperature range of the coil in high-temperature self-cleaning mode.

[0076] It should be noted that the second range refers to the range consisting of the upper limit of the normal temperature range of the coil under high temperature self-cleaning mode.

[0077] For example, in high-temperature self-cleaning mode, if the air outlet temperature during the defrosting stage is 56°C, the normal temperature range corresponding to the coil is between 56°C and 61°C, so the second range can be (61, +∞).

[0078] Specifically, in step 103-2, the outdoor unit's control device compares the next coil temperature obtained after the initial speed adjustment in step 102 with the normal temperature range of the coil under high-temperature self-cleaning mode. If it is determined that the value is within the second range, it sends an acceleration control command to the indoor unit.

[0079] Based on the speed updated in the initial speed adjustment, since the heat carried away by the indoor unit's fan speed is relatively lower than the heat generated by the outdoor unit's compressor, its system pressure value is higher, resulting in excessively high coil temperature and affecting the service life of components. Therefore, the indoor unit receives and responds to the speed increase control command to increase the speed of its internal fan. By increasing the airflow, it accelerates the heat exchange process, gradually reducing the coil temperature to the normal temperature range, and maintaining the outlet air temperature at 56℃ throughout subsequent operation.

[0080] Understandably, if the temperature of the next coil is within the normal temperature range of the coil in high-temperature self-cleaning mode, it means that the initial speed adjustment can keep the system pressure in a relatively stable state. Therefore, there is no need to control the indoor unit to adjust the fan speed, and it will still operate at the speed updated after the initial speed adjustment.

[0081] This invention, based on the initial control of the indoor unit adjusting its speed to a target speed determined by the current coil temperature, and after running in this state for a first preset time, determines whether to increase or decrease the fan speed of the indoor unit by continuously monitoring the next coil temperature. This achieves the analysis of system pressure values ​​based on coil temperature and the adaptive adjustment of the indoor unit's fan speed, ensuring that the coil temperature under high-temperature self-cleaning mode remains within the normal temperature range, thereby guaranteeing a stable outlet air temperature of 56°C. This improves the efficiency of high-temperature self-cleaning and avoids sudden increases or decreases in system pressure caused by unilaterally maintaining the outlet air temperature through frequency adjustment, which could lead to system shutdown.

[0082] Based on any of the above embodiments, if it is determined that the temperature of the next coil is in the first range, the indoor unit is controlled to reduce the fan speed based on the adjusted speed, including: obtaining the first speed change corresponding to the first target sub-range according to the temperature of the next coil.

[0083] The first target sub-interval is obtained by dividing the first interval into sub-intervals. The first change in rotational speed is less than zero.

[0084] It should be noted that the indoor unit control device pre-defines N1 points within the first interval to obtain N1+1 sub-intervals.

[0085] Where N1 is a positive integer greater than or equal to 1. Each sub-interval corresponds to a different first speed change. Furthermore, each first speed change is less than zero, and its absolute value increases as the lower limit of the corresponding sub-interval approaches the lower limit of the first interval.

[0086] Specifically, in step 103-1, the indoor unit control device takes the sub-range where the next coil temperature is located as the first target sub-range and obtains the first speed change corresponding to the sub-range.

[0087] The first speed change is the decrease in speed per unit time. This first speed change indicates the rate of decrease in the fan speed within the indoor unit.

[0088] Based on the first change in rotational speed, the indoor unit is controlled to reduce the fan speed based on the adjusted rotational speed.

[0089] Specifically, the indoor unit control device encapsulates the first speed change into a deceleration control command and sends the command to the indoor unit.

[0090] The indoor unit receives and responds to the speed reduction control command, and controls its internal fan to reduce the fan speed according to the reduction rate indicated by the first speed change, based on the updated speed after the initial speed adjustment.

[0091] This embodiment of the invention does not specifically limit the above-described deceleration process. For example, taking N1 equal to 1 as an example, the first interval can be divided into two sub-intervals, namely [-∞, 52) and [52, 56), where:

[0092] If the temperature of the next coil is in the range of [-∞, 52), the corresponding first speed change is -30 radians per minute (rad / min), meaning that the fan speed of the indoor unit decreases by 30 rad / min.

[0093] If the temperature of the next coil is in the range of [52, 56), the corresponding first speed change is -10 rad / min, meaning that the fan speed of the indoor unit decreases by 10 rad / min.

[0094] This invention, based on the next coil temperature, determines the first speed change by identifying the sub-range of the next coil temperature when controlling the indoor unit to reduce fan speed. This allows the indoor unit to systematically reduce fan speed according to the first speed change. It achieves system pressure value analysis based on coil temperature and, after initial speed adjustment, quantitatively adjusts fan speed according to subsequent coil temperatures. This ensures that the coil temperature remains within the normal range during high-temperature self-cleaning mode operation, guaranteeing a stable outlet air temperature of 56°C and improving the efficiency of high-temperature self-cleaning.

[0095] Based on any of the above embodiments, controlling the indoor unit to reduce the fan speed based on the first speed change includes: within a second preset time period, controlling the indoor unit to reduce the fan speed based on the adjusted speed according to the first speed change, so that the indoor unit continues at the reduced fan speed for the second preset time period.

[0096] The second preset duration is longer than the third preset duration.

[0097] It should be noted that the second preset duration is used to indicate the duration for reducing the fan speed.

[0098] The third preset duration is used to indicate the duration for which the reduced fan speed is maintained.

[0099] Specifically, the indoor unit control device can also formulate different speed reduction strategies based on the first speed change and the duration of the speed reduction at the corresponding rate. That is, at each second preset duration, the indoor unit control device sends a control command to the indoor unit containing the first speed change and the third preset duration, so as to control the indoor unit to reduce the speed according to the first speed change within each second preset duration, and maintain the reduced speed value within the third preset duration.

[0100] The embodiments of the present invention do not specifically limit the values ​​of the second preset duration and the third preset duration.

[0101] Optionally, the first preset duration is 2 minutes, and the second preset duration is 1 minute. In the speed reduction strategy corresponding to different sub-intervals under the first interval, the first speed change corresponding to the sub-interval is continuously reduced for 2 minutes and then maintained for 1 minute.

[0102] Optionally, the first preset duration and the second preset duration corresponding to different sub-intervals under the first interval can also be set to be negatively correlated. That is, in the speed reduction strategy corresponding to the next coil temperature, the lower the next coil temperature, the longer the corresponding first preset duration and the second preset duration.

[0103] This invention, based on the sub-range of the next coil temperature, decides to implement a speed reduction strategy corresponding to that sub-range. The indoor unit's fan decelerates by a corresponding first speed change within a second preset time period, and then continues for a third preset time period. This achieves stable and quantitative adjustment of the fan speed reduction based on the next coil temperature, preventing fluctuations in the fan speed from affecting the stable operation of the air conditioner.

[0104] Based on any of the above embodiments, if it is determined that the temperature of the next coil is in the second range, the indoor unit is controlled to increase the fan speed based on the adjusted speed, including: obtaining the second speed change corresponding to the second target sub-range according to the temperature of the next coil.

[0105] The second target sub-interval is obtained by dividing the second interval. The second rotational speed change is greater than zero.

[0106] It should be noted that the indoor unit control device pre-defines N2 points within the second interval to obtain N2+1 sub-intervals.

[0107] Where N2 is a positive integer greater than or equal to 1. Each sub-interval corresponds to a different second speed change amount. Furthermore, each second speed change amount is greater than zero, and its absolute value increases as the upper limit of the corresponding sub-interval approaches the upper limit of the second interval.

[0108] Specifically, in step 103-2, the indoor unit control device takes the sub-range where the next coil temperature is located as the second target sub-range and obtains the second speed change corresponding to the sub-range.

[0109] The second speed change is the increase in speed per unit time. This second speed change indicates the rate of increase in the fan speed within the indoor unit.

[0110] Based on the second speed change, the indoor unit is controlled to increase the fan speed on the basis of the adjusted speed.

[0111] Specifically, the indoor unit control device encapsulates the acquired second speed change into an acceleration control command and sends the command to the indoor unit.

[0112] The indoor unit receives and responds to the speed control command, controlling its internal fan to increase the fan speed according to the increase rate indicated by the second speed change, based on the updated speed after the initial speed adjustment.

[0113] This embodiment of the invention does not specifically limit the above-described deceleration process. For example, taking N2 equal to 1 as an example, the second interval can be divided into at least two sub-intervals, namely [61, 63) and [63, 66), wherein:

[0114] If the temperature of the next coil is in the range of [61, 63), the corresponding first speed change is 20 rad / min, meaning that the fan speed of the indoor unit increases by 20 rad / min.

[0115] If the temperature of the next coil is in the range of [63, 66), the corresponding first speed change is 40 rad / min, meaning that the fan speed of the indoor unit increases by 40 rad / min.

[0116] In this embodiment of the invention, when the indoor unit increases its fan speed based on the next coil temperature, a second speed change is determined by the sub-range of the next coil temperature. This allows the indoor unit to systematically increase the fan speed according to this second speed change. This achieves system pressure value analysis based on coil temperature, and after initial speed adjustment, quantitative adjustment of the fan speed based on subsequent coil temperatures. This ensures that the coil temperature remains within the normal range during high-temperature self-cleaning mode operation, guaranteeing a stable outlet air temperature of 56°C and improving the efficiency of high-temperature self-cleaning.

[0117] Based on any of the above embodiments, based on the second speed change, controlling the indoor unit to increase the fan speed on the basis of the adjusted speed includes: within a fourth preset time period, controlling the indoor unit to increase the fan speed on the basis of the adjusted speed according to the second speed change, so that the indoor unit can continue at the increased fan speed for a fifth preset time period.

[0118] The fourth preset duration is longer than the fifth preset duration.

[0119] It should be noted that the fourth preset duration is used to indicate the duration for increasing the fan speed.

[0120] The fifth preset duration is used to indicate the duration for maintaining the fan speed after the increase.

[0121] Specifically, the indoor unit control device can also formulate different speed increase strategies based on the second speed change amount and the duration of the speed increase at the corresponding rate. That is, at each fourth preset time period, the indoor unit control device sends a control command containing the second speed change amount and the fifth preset time period to the indoor unit to control the indoor unit to increase the speed according to the second speed change amount within each fourth preset time period, and maintain the speed value after the increase within the fifth preset time period.

[0122] The embodiments of the present invention do not specifically limit the values ​​of the fourth preset duration and the fifth preset duration.

[0123] For example, when the next coil temperature is in [61, 63), the speed increase strategy is to control the fan speed to increase by 20 rad / min, stabilize for 1 minute after every 2 minutes of increase, and continue to obtain the new coil temperature to make the above judgment.

[0124] When the next coil temperature is in the range of [63, 66), the speed increase strategy is to control the fan speed to increase by 40 rad / min, stabilize for 20 seconds after every 2 minutes of increase, and continue to obtain the new coil temperature for the above judgment.

[0125] Understandably, during subsequent speed adjustment, if the speed is increased at the rate indicated by the second speed change and the updated speed value has reached the rated maximum fan speed of the indoor unit, then the speed will not be increased further, but will continue to operate at the maximum fan speed.

[0126] This invention, based on the sub-range of the next coil temperature, decides to implement the corresponding speed increase strategy for that sub-range. It controls the indoor unit's fan to increase its speed by the corresponding second speed change within a fourth preset time period, and then continues for a fifth preset time period. This achieves stable and quantitative adjustment of the fan speed reduction based on the next coil temperature, preventing fluctuations in the fan speed from affecting the stable operation of the air conditioner.

[0127] Based on any of the above embodiments, controlling the indoor unit to adjust its speed based on the target speed includes: when the target speed is determined to be greater than or equal to the rated maximum speed of the indoor unit, controlling the indoor unit to adjust the fan speed to the maximum speed.

[0128] Specifically, in step 102, the indoor unit control device compares the target speed with the rated maximum speed of the indoor unit:

[0129] If the target speed is greater than or equal to the rated maximum speed, the rated maximum speed will be used as the target speed to control the indoor unit to increase the fan speed to the rated maximum value, and the coil temperature will continue to be monitored to make subsequent dynamic adjustments to the speed based on the rated maximum value.

[0130] If the target speed is less than the rated maximum speed, the indoor unit will be directly controlled to increase the fan speed to the target speed, and the coil temperature will continue to be monitored so as to make subsequent dynamic adjustments to the speed based on the target speed.

[0131] In this embodiment of the invention, after the target speed has reached the rated maximum speed, the corresponding compensation is continuously performed at that speed to avoid overloading the indoor unit's fan, which could cause excessive heat inside the indoor unit casing and easily lead to safety problems.

[0132] Figure 2 This is a structural schematic diagram of the indoor unit control device provided by the present invention. Based on any of the above embodiments, such as... Figure 2 As shown, the indoor unit control device provided in this embodiment of the invention includes: a speed determination module 210, an initial control module 220, a first subsequent control module 230-1, and a second subsequent control module 230-2, wherein:

[0133] The speed determination module 210 is used to determine the target speed based on the current coil temperature.

[0134] The initial control module 220 is used to control the indoor unit to adjust its speed based on the target speed, so that the indoor unit can run continuously at the adjusted speed for a first preset time.

[0135] The first subsequent control module 230-1 is used to control the indoor unit to reduce the fan speed based on the adjusted speed if it is determined that the temperature of the next coil is in the first range.

[0136] The second subsequent control module 230-2 is used to control the indoor unit to increase the fan speed based on the adjusted speed if it is determined that the temperature of the next coil is in the second range.

[0137] The current coil temperature is obtained when the air conditioner starts the high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has been running at the adjusted speed for a first preset time; the first and second intervals are determined by the normal temperature range of the coil under the high-temperature self-cleaning mode.

[0138] Specifically, the speed determination module 210, the initial control module 220, the first subsequent control module 230-1, and the second subsequent control module 230-2 are electrically connected in sequence.

[0139] After determining the start of the high-temperature self-cleaning mode of the air conditioner based on the operating information fed back by each component according to the activation command, the speed determination module 210 uses the coil temperature collected by the sensing module in the current working cycle to calculate the corresponding target speed.

[0140] The initial control module 220 encapsulates the target speed obtained in step 101 and the corresponding first preset duration of continuous operation into an initial control command, and sends the command to the indoor unit.

[0141] After the initial speed adjustment executed by the initial control module 220, the first subsequent control module 230-1 compares the obtained next coil temperature with the normal temperature range of the coil under high temperature self-cleaning mode. If it is determined that the value is within the first range, a speed reduction control command is sent to the indoor unit.

[0142] After the initial speed adjustment executed by the initial control module 220, the second subsequent control module 230-2 compares the obtained next coil temperature with the normal temperature range of the coil under high temperature self-cleaning mode. If it is determined that the value is in the second range, it sends an acceleration control command to the indoor unit.

[0143] Optionally, the first subsequent control module 230-1 includes a first speed change determination unit and a speed reduction control unit, wherein:

[0144] The first speed change determination unit is used to obtain the first speed change amount corresponding to the first target sub-interval based on the next coil temperature.

[0145] The speed reduction control unit is used to control the indoor unit to reduce the fan speed based on the first speed change.

[0146] The first target sub-interval is obtained by dividing the first interval into sub-intervals. The first change in rotational speed is less than zero.

[0147] Optionally, the speed reduction control unit is specifically used to control the indoor unit to reduce the fan speed based on the adjusted speed according to the first speed change within a second preset time period, so that the indoor unit can continue at the reduced fan speed for the second preset time period.

[0148] The second preset duration is longer than the third preset duration.

[0149] Optionally, the second subsequent control module 230-2 includes a second speed change determination unit and a speed increase control unit, wherein:

[0150] The second speed change determination unit is used to obtain the second speed change amount corresponding to the second target sub-interval based on the second target sub-interval corresponding to the next coil temperature.

[0151] The speed control unit is used to control the indoor unit to increase the fan speed based on the second speed change.

[0152] The second target sub-interval is obtained by dividing the second interval; the second rotational speed change is greater than zero.

[0153] Optionally, the speed control unit is specifically used to control the indoor unit to increase the fan speed based on the adjusted speed according to the second speed change within a fourth preset time period, so that the indoor unit can continue at the increased fan speed for a fifth preset time period.

[0154] The fourth preset duration is longer than the fifth preset duration.

[0155] Optionally, the initial control module 220 is specifically used to control the indoor unit to adjust the fan speed to the maximum speed when the target speed is determined to be greater than or equal to the rated maximum speed of the indoor unit.

[0156] The indoor unit control device provided in this embodiment of the invention is used to execute the indoor unit control method described above. Its implementation method is consistent with that of the indoor unit control method provided by this invention, and it can achieve the same beneficial effects. It will not be described again here.

[0157] This invention, based on the initial control of the indoor unit adjusting its speed to a target speed determined by the current coil temperature, and after running in this state for a first preset time, determines whether to increase or decrease the fan speed of the indoor unit by continuously monitoring the next coil temperature. This achieves the analysis of system pressure values ​​based on coil temperature and the adaptive adjustment of the indoor unit's fan speed, ensuring that the coil temperature under high-temperature self-cleaning mode remains within the normal temperature range, thereby guaranteeing a stable outlet air temperature of 56°C. This improves the efficiency of high-temperature self-cleaning and avoids sudden increases or decreases in system pressure caused by unilaterally maintaining the outlet air temperature through frequency adjustment, which could lead to system shutdown.

[0158] Figure 3 This is a structural schematic diagram of the air conditioner provided by the present invention. Based on any of the above embodiments, such as... Figure 3 As shown, the air conditioner includes an indoor unit 310 and an outdoor unit 320. The indoor unit 310 is equipped with a control processor 311 and a sensor module 312. The sensor module 312 is located at the coil of the indoor unit 310. It also includes a memory and a program or instruction stored in the memory and executable on the control processor. When the program or instruction is executed by the control processor 311, the indoor unit control method is executed.

[0159] Specifically, the air conditioner consists of an indoor unit 310 and an outdoor unit 320. The control processor 311 can be integrated into the control development board of the indoor unit 310 as a chip or microprocessor. Through the communication connection between the control processor 311 and the indoor unit 310 and the sensor module 312, the air conditioner can achieve compensated control of the fan speed in the high-temperature self-cleaning mode.

[0160] A sensor module 312 needs to be installed at the coil in the indoor unit 310 to collect the coil temperature in real time and feed it back to the control processor 311 for logical judgment of the fan speed of the indoor unit 310. The control processor 311 then transmits signals to both the indoor unit 310 and the sensor module 312 using wireless communication technology.

[0161] The present invention does not impose a specific limit on the number of temperature sensors in the sensing module 312.

[0162] Optionally, the sensing module 312 may have a temperature sensor installed at the coil, and the indoor unit control device will use the temperature data collected by the sensor as the coil temperature.

[0163] Optionally, the sensing module 312 may have multiple temperature sensors evenly spaced at the coil. The indoor unit control device uses the temperature data collected by each sensor to sum and average the data to obtain the coil temperature.

[0164] The wireless communication technologies include, but are not limited to, WIFI wireless cellular signals (2G, 3G, 4G, 5G), Bluetooth, Zigbee, etc., and the embodiments of the present invention do not specifically limit them.

[0165] The air conditioner of the present invention also includes a memory and a program or instructions stored in the memory and executable on a control processor 311. The control processor 311 can call logical instructions in the memory to execute the indoor unit control method of the present invention. This method includes: determining a target rotation speed based on the current coil temperature; controlling the indoor unit to adjust its rotation speed based on the target rotation speed, so that the indoor unit continues to operate at the adjusted rotation speed for a first preset duration; if the next coil temperature is determined to be in a first range, controlling the indoor unit to reduce the fan speed based on the adjusted rotation speed; if the next coil temperature is determined to be in a second range, controlling the indoor unit to increase the fan speed based on the adjusted rotation speed; wherein the current coil temperature is obtained when the air conditioner is in a high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has continuously operated at the adjusted rotation speed for a first preset duration; the first range and the second range are determined by the normal temperature range of the coil under the high-temperature self-cleaning mode.

[0166] Furthermore, the logical instructions in the aforementioned memory can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0167] This invention, based on the initial control of the indoor unit adjusting its speed to a target speed determined by the current coil temperature, and after running in this state for a first preset time, determines whether to increase or decrease the fan speed of the indoor unit by continuously monitoring the next coil temperature. This achieves the analysis of system pressure values ​​based on coil temperature and the adaptive adjustment of the indoor unit's fan speed, ensuring that the coil temperature under high-temperature self-cleaning mode remains within the normal temperature range, thereby guaranteeing a stable outlet air temperature of 56°C. This improves the efficiency of high-temperature self-cleaning and avoids sudden increases or decreases in system pressure caused by unilaterally maintaining the outlet air temperature through frequency adjustment, which could lead to system shutdown.

[0168] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the indoor unit control method provided by the above methods. The method includes: determining a target speed based on the current coil temperature; controlling the indoor unit to adjust its speed based on the target speed so that the indoor unit can continuously run at the adjusted speed for a first preset time; if the next coil temperature is determined to be in a first range, controlling the indoor unit to reduce the fan speed based on the adjusted speed; if the next coil temperature is determined to be in a second range, controlling the indoor unit to increase the fan speed based on the adjusted speed; wherein, the current coil temperature is obtained when the air conditioner starts the high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has continuously run at the adjusted speed for a first preset time; the first range and the second range are determined by the normal temperature range of the coil under the high-temperature self-cleaning mode.

[0169] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the indoor unit control method provided by the above methods. The method includes: determining a target rotation speed based on the current coil temperature; controlling the indoor unit to adjust its rotation speed based on the target rotation speed, so that the indoor unit continues to operate at the adjusted rotation speed for a first preset duration; if the next coil temperature is determined to be in a first range, controlling the indoor unit to reduce the fan speed based on the adjusted rotation speed; if the next coil temperature is determined to be in a second range, controlling the indoor unit to increase the fan speed based on the adjusted rotation speed; wherein the current coil temperature is obtained when the air conditioner is in high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has continuously operated at the adjusted rotation speed for a first preset duration; the first range and the second range are determined by the normal temperature range of the coil under high-temperature self-cleaning mode.

[0170] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0171] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of controlling an indoor unit, the method comprising: determining whether a user is present in a room; and controlling the indoor unit based on the determination. include: Determine the target rotation speed based on the current coil temperature; Based on the target rotation speed, the indoor unit is controlled to adjust its rotation speed so that the indoor unit can run continuously at the adjusted rotation speed for a first preset time. If the temperature of the next coil is determined to be in the first range, the indoor unit is controlled to reduce the fan speed based on the adjusted speed. If it is determined that the temperature of the next coil is in the second range, the indoor unit is controlled to increase the fan speed based on the adjusted speed. The current coil temperature is obtained when the air conditioner is in high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has been running at the adjusted speed for a first preset time; the first interval and the second interval are determined by the normal temperature range of the coil in the high-temperature self-cleaning mode; the first interval refers to the interval formed by the lower limit of the normal temperature range of the coil in the high-temperature self-cleaning mode, and the second interval refers to the interval formed by the upper limit of the normal temperature range of the coil in the high-temperature self-cleaning mode. If it is determined that the next coil temperature is in the first range, the indoor unit is controlled to reduce the fan speed based on the adjusted speed, including: Based on the first target sub-range corresponding to the next coil temperature, obtain the first rotational speed change corresponding to the first target sub-range; Based on the first change in rotation speed, the indoor unit is controlled to reduce the fan speed based on the adjusted rotation speed. Wherein, the first target sub-interval is obtained by dividing the first interval into intervals; the first speed change is less than zero; If it is determined that the temperature of the next coil is in the second range, the indoor unit is controlled to increase the fan speed based on the adjusted speed, including: Based on the second target sub-range corresponding to the next coil temperature, obtain the second rotational speed change corresponding to the second target sub-range; Based on the second speed change, the indoor unit is controlled to increase the fan speed on the basis of the adjusted speed. Wherein, the second target sub-interval is obtained by dividing the second interval into intervals; the second speed change is greater than zero; The step of controlling the indoor unit to reduce the fan speed based on the first speed change includes: Within a second preset time period, the indoor unit is controlled to reduce the fan speed based on the adjusted speed according to the first speed change, so that the indoor unit can continue at the reduced fan speed for a third preset time period. Wherein, the second preset duration is greater than the third preset duration; The step of controlling the indoor unit to increase the fan speed based on the second speed change includes: Within a fourth preset time period, the indoor unit is controlled to increase the fan speed based on the adjusted speed according to the second speed change, so that the indoor unit can maintain the increased fan speed for a fifth preset time period. The fourth preset duration is longer than the fifth preset duration.

2. The indoor unit control method according to claim 1, characterized by, The step of controlling the indoor unit to adjust its speed based on the target speed includes: If the target rotational speed is determined to be greater than or equal to the rated maximum rotational speed of the indoor unit, the indoor unit is controlled to adjust the fan speed to the maximum rotational speed.

3. An indoor unit control device characterized by comprising: include: The speed determination module is used to determine the target speed based on the current coil temperature; The initial control module is used to control the indoor unit to adjust its speed based on the target speed, so that the indoor unit can run continuously at the adjusted speed for a first preset time. The first subsequent control module is used to control the indoor unit to reduce the fan speed based on the adjusted speed if it is determined that the next coil temperature is in the first range. If it is determined that the next coil temperature is in the first range, the indoor unit is controlled to reduce the fan speed based on the adjusted speed, including: Based on the first target sub-range corresponding to the next coil temperature, obtain the first rotational speed change corresponding to the first target sub-range; Based on the first change in rotation speed, the indoor unit is controlled to reduce the fan speed based on the adjusted rotation speed. Wherein, the first target sub-interval is obtained by dividing the first interval into intervals; the first speed change is less than zero; The second subsequent control module is used to control the indoor unit to increase the fan speed based on the adjusted rotation speed if it is determined that the next coil temperature is in the second range; the step of controlling the indoor unit to increase the fan speed based on the adjusted rotation speed if it is determined that the next coil temperature is in the second range includes: Based on the second target sub-range corresponding to the next coil temperature, obtain the second rotational speed change corresponding to the second target sub-range; Based on the second speed change, the indoor unit is controlled to increase the fan speed on the basis of the adjusted speed. Wherein, the second target sub-interval is obtained by dividing the second interval into intervals; the second speed change is greater than zero; The current coil temperature is obtained when the air conditioner is in high-temperature self-cleaning mode; the next coil temperature is the coil temperature after the indoor unit has been running at the adjusted speed for a first preset time; the first interval and the second interval are determined by the normal temperature range of the coil in the high-temperature self-cleaning mode. The step of controlling the indoor unit to reduce the fan speed based on the first speed change includes: Within a second preset time period, the indoor unit is controlled to reduce the fan speed based on the adjusted speed according to the first speed change, so that the indoor unit can continue at the reduced fan speed for a third preset time period. Wherein, the second preset duration is greater than the third preset duration; The step of controlling the indoor unit to increase the fan speed based on the second speed change includes: Within a fourth preset time period, the indoor unit is controlled to increase the fan speed based on the adjusted speed according to the second speed change, so that the indoor unit can maintain the increased fan speed for a fifth preset time period. The fourth preset duration is longer than the fifth preset duration.

4. An air conditioner characterized by comprising: The system includes an indoor unit and an outdoor unit. The indoor unit is equipped with a control processor and a sensor module, with the sensor module located at the coil of the indoor unit. The system also includes a memory and a program or instructions stored in the memory and executable on the control processor. When the program or instructions are executed by the control processor, they perform the indoor unit control method as described in claim 1 or 2.

5. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, When the computer program is executed by the processor, it implements the indoor unit control method as described in claim 1 or 2.

6. A computer program product comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the indoor unit control method as described in claim 1 or 2.

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