Air conditioner control method and device

Abstract

The invention relates to the technical field of air conditioners, and provides an air conditioner control method and device.The method comprises the steps that the current pressure difference between the current exhaust pressure and the current suction pressure of a compressor is obtained; determining a basic torque compensation coefficient based on the current rotating speed and the current pressure difference of the compressor; correcting the basic torque compensation coefficient based on the current operation parameters of the compressor motor to obtain a target torque compensation coefficient; and a target torque compensation amount is determined based on the target torque compensation coefficient, and the compressor is controlled to operate based on the target torque compensation amount. According to the method, the current pressure difference and the current rotating speed of the compressor are obtained, the basic torque compensation coefficient is determined, the basic torque compensation coefficient is corrected in combination with the real-time operation parameters of the compressor motor, the target torque compensation coefficient matched with the current working condition is obtained, and real-time accurate compensation of the output torque of the compressor is achieved; the torque control precision and adaptability of the compressor are improved, and the operation stability of the air conditioner and the use experience of a user are enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner control method and device. BACKGROUND

[0002] During the operation of the compressor, the accuracy and stability of the output torque are the core of ensuring the efficient and reliable operation of the equipment. The actual operation condition of the compressor is complex and changeable, especially during variable frequency speed regulation, load mutation or start-stop stage, the motor torque needs to respond quickly to overcome system inertia and load disturbance. If the torque control is improper, it is easy to cause speed fluctuation, abnormal vibration and mechanical stress concentration, which not only affects the running stability and energy efficiency of the compressor, but also long-term damages the mechanical life of the equipment. Therefore, how to realize the accurate control of the compressor torque has become an important technical problem in the field.

[0003] Currently, in order to improve the torque control performance, a torque compensation mechanism is introduced. However, the existing compensation method relies on the operating frequency and sets a fixed compensation coefficient, which is difficult to accurately match the real-time changing torque demand, and is easy to cause overcompensation or insufficient compensation, thereby causing torque pulsation, control instability and other problems. SUMMARY

[0004] The present application provides an air conditioner control method and device to solve the defect that the torque compensation mechanism in the prior art relies on the operating frequency and uses a fixed compensation coefficient, realizes real-time dynamic compensation of the output torque of the compressor, and improves the running stability and user experience.

[0005] The present application provides an air conditioner control method, comprising: obtaining a current pressure difference of a current discharge pressure and a current suction pressure of a compressor; determining a basic torque compensation coefficient based on a current speed of the compressor and the current pressure difference; correcting the basic torque compensation coefficient based on a current operating parameter of a motor of the compressor to obtain a target torque compensation coefficient; wherein the current operating parameter of the motor of the compressor includes a current current of the motor of the compressor and / or a current temperature of the motor of the compressor; determining a target torque compensation amount based on the target torque compensation coefficient, and controlling the compressor to operate based on the target torque compensation amount.

[0006] According to the air conditioner control method provided by the present application, the basic torque compensation coefficient is determined based on the current speed of the compressor and the current pressure difference, comprising: determining a first ratio value by taking the ratio of the current pressure difference and a preset rated pressure difference; determining a second ratio value by taking the ratio of the current speed and a preset rated speed; determine a basic torque compensation coefficient based on the first ratio and the second ratio.

[0007] According to the air conditioner control method provided by the present application, the basic torque compensation coefficient is determined based on the first ratio and the second ratio, which comprises: determining a first torque compensation coefficient as the product of the first ratio and a preset pressure correction coefficient; determining a second torque compensation coefficient as the product of the second ratio and a preset speed correction coefficient; determining the basic torque compensation coefficient as the sum of the first torque compensation coefficient and the second torque compensation coefficient.

[0008] According to the air conditioner control method provided by the present application, the basic torque compensation coefficient is modified based on the current operating parameters of the compressor motor to obtain a target torque compensation coefficient, which comprises: determining a torque compensation correction coefficient based on the current operating parameters of the compressor motor; determining the target torque compensation coefficient as the product of the basic torque compensation coefficient and the torque compensation correction coefficient.

[0009] According to the air conditioner control method provided by the present application, the current operating parameters of the compressor motor include the current current of the compressor motor and the current temperature of the compressor motor; and the torque compensation correction coefficient is determined based on the current operating parameters of the compressor motor, which comprises: determining a current variation based on the current current of the compressor motor and a preset rated current; determining a temperature variation based on the current temperature of the compressor motor and a preset temperature; determining the torque compensation correction coefficient based on the current variation and the temperature variation.

[0010] According to the air conditioner control method provided by the present application, the current variation is determined based on the current current of the compressor motor and a preset rated current, which comprises: determining a first difference as the difference between the preset rated current and the current current of the compressor motor; determining the current variation as the ratio of the first difference to the preset rated current.

[0011] According to the air conditioner control method provided by the present application, the temperature variation is determined based on the current temperature of the compressor motor and a preset temperature, which comprises: determining a second difference as the difference between the preset temperature and the current temperature of the compressor motor; The ratio of the second difference value and the preset temperature is determined as a temperature change amount.

[0012] According to the air conditioner control method provided by the present application, the torque compensation correction coefficient is determined based on the current change amount and the temperature change amount, and the method comprises the following steps: The product of the current change amount and a preset current correction coefficient is determined as a third torque compensation coefficient. The product of the temperature change amount and a preset temperature correction coefficient is determined as a fourth torque compensation coefficient. The sum of the third torque compensation coefficient, the fourth torque compensation coefficient and 1 is determined as a torque compensation correction coefficient.

[0013] According to the air conditioner control method provided by the present application, the product of the basic torque compensation coefficient and the torque compensation correction coefficient is determined as a target torque compensation coefficient, and the method comprises the following steps: The product of the basic torque compensation coefficient and the torque compensation correction coefficient is determined as an initial torque compensation coefficient. The initial torque compensation coefficient is compared with a preset torque compensation coefficient interval. In the case that the initial torque compensation coefficient is in the preset torque compensation coefficient interval, the initial torque compensation coefficient is determined as a target torque compensation coefficient. In the case that the initial torque compensation coefficient is less than a low torque compensation coefficient threshold value of the preset torque compensation coefficient interval, the low torque compensation coefficient threshold value is determined as a target torque compensation coefficient. In the case that the initial torque compensation coefficient is greater than a high torque compensation coefficient threshold value of the preset torque compensation coefficient interval, the high torque compensation coefficient threshold value is determined as a target torque compensation coefficient.

[0014] According to the air conditioner control method provided by the present application, the current pressure difference between the current discharge pressure and the current suction pressure of the compressor is obtained, and the method comprises the following steps: The current running frequency of the compressor is obtained. In the case that the current running frequency is less than or equal to a preset compensation frequency, the current pressure difference between the current discharge pressure and the current suction pressure of the compressor is obtained.

[0015] The present application further provides an air conditioner control device, which comprises: The obtaining module is used for obtaining the current pressure difference between the current discharge pressure and the current suction pressure of the compressor. The determining module is used for determining a basic torque compensation coefficient based on the current rotating speed of the compressor and the current pressure difference. An obtaining module is configured to correct the basic torque compensation coefficient based on a current operating parameter of the compressor motor to obtain a target torque compensation coefficient, wherein the current operating parameter of the compressor motor includes a current current of the compressor motor and / or a current temperature of the compressor motor. A control module is configured to determine a target torque compensation amount based on the target torque compensation coefficient and control the compressor to operate based on the target torque compensation amount The air conditioner control method provided by the application can obtain the target torque compensation coefficient matched with the current working condition by obtaining the current pressure difference and the current rotating speed of the compressor in real time, determining the basic torque compensation coefficient comprehensively, and correcting the basic torque compensation coefficient based on the real-time operating parameter of the compressor motor. In this way, the real-time and accurate compensation of the output torque of the compressor is realized, the problems of overcompensation or insufficient compensation of the torque caused by the change of the working condition are effectively avoided, the torque control precision and adaptability of the compressor are significantly improved, and the stability of the operation of the air conditioner and the user experience are enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0017] Figure 1 is one of the flowcharts of the air conditioner control method provided by the application.

[0018] Figure 2 is the second flowchart of the air conditioner control method provided by the application.

[0019] Figure 3 is the third flowchart of the air conditioner control method provided by the application.

[0020] Figure 4 is the fourth flowchart of the air conditioner control method provided by the application.

[0021] Figure 5 is the fifth flowchart of the air conditioner control method provided by the application.

[0022] Figure 6 is the sixth flowchart of the air conditioner control method provided by the application.

[0023] Figure 7 is the structural schematic diagram of the air conditioner control device provided by the application.

[0024] Figure 8Fig. 1 is a structural schematic diagram of an electronic device provided by the present application. DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0026] The present application will be described below with reference to the drawings. Figures 1-6 The present application relates to an air conditioner control method.

[0027] Embodiments of the first aspect of the present application provide an air conditioner control method, as shown in Fig. 1, the method comprises the following steps: Figure 1 Step 100, obtaining a current pressure difference between a current discharge pressure and a current suction pressure of a compressor.

[0028] Step 200, determining a basic torque compensation coefficient based on a current speed of the compressor and the current pressure difference.

[0029] The pressure difference of the compressor reflects the real-time load borne by the compressor, and the speed of the compressor reflects the current working state. By combining the two external working condition parameters (the current speed and the current pressure difference), the basic torque compensation coefficient can be determined, which can more accurately map the basic driving torque required by the compressor under different external working conditions.

[0030] Step 300, correcting the basic torque compensation coefficient based on a current operating parameter of a compressor motor to obtain a target torque compensation coefficient.

[0031] The current operating parameter of the compressor motor includes a current current of the compressor motor and / or a current temperature of the compressor motor.

[0032] It can be understood that the basic torque compensation coefficient is corrected considering the change of the operating state of the motor (the compressor motor). For example, the increase of the motor temperature will cause the increase of the winding resistance and the decrease of the efficiency, and the change of the current also reflects the internal factors such as the saturation degree of the magnetic circuit. By introducing the current operating parameter of the motor to correct the basic torque compensation coefficient, the torque deviation caused by the efficiency fluctuation of the motor itself can be compensated, so that the compensation is more accurate, and the double self-adaptation of the external working condition and the internal state is realized.

[0033] Step 400, determining a target torque compensation amount based on the target torque compensation coefficient, and controlling the compressor to operate based on the target torque compensation amount. ​

[0034] It can be understood that, based on the target torque compensation coefficient to control the compressor to run, the torque fluctuation caused by load fluctuation or motor characteristic change can be offset in real time, so that the vibration and jitter during the running of the compressor can be effectively inhibited, the running noise can be significantly reduced, and the running stability of the air conditioning system can be improved, and the user's comfort experience can be improved.

[0035] The air conditioner control method provided by the embodiment of the application obtains the current pressure difference and the current rotating speed of the compressor in real time, comprehensively determines the basic torque compensation coefficient, and corrects the basic torque compensation coefficient in combination with the real-time running parameters of the compressor motor, so that the target torque compensation coefficient matched with the current working condition is obtained. In this way, the real-time and accurate compensation of the output torque of the compressor is realized, the problems of excessive or insufficient torque compensation caused by the change of working conditions are effectively avoided, the torque control precision and adaptability of the compressor are significantly improved, and the stability of the running of the air conditioner and the user experience are further enhanced.

[0036] In an embodiment of the application, as shown in Figure 2 The step 200 can specifically include the following steps: The step 210 determines the ratio of the current pressure difference to the preset rated pressure difference as a first ratio.

[0037] The load torque of the compressor is positively correlated with the pressure difference (the difference between the exhaust pressure of the compressor and the suction pressure of the compressor), that is, the greater the pressure difference, the greater the load torque that needs to be overcome by the compressor. Therefore, when the pressure difference increases, the torque compensation coefficient needs to be increased accordingly to enhance the output torque of the motor and ensure effective driving of the compressor. When the pressure difference decreases, the torque compensation coefficient should be reduced to avoid system shock or torque pulsation caused by excessive output torque, so as to realize accurate matching of torque compensation and stable control of system running.

[0038] It can be understood that, by comparing the actual current pressure difference with a reference preset rated pressure difference, the current load level is quantified by the ratio (the first ratio) of the two.

[0039] The step 220 determines the ratio of the current rotating speed to the preset rated rotating speed as a second ratio.

[0040] In variable frequency compressors, changes in compressor speed can cause nonlinear fluctuations in load torque. For example, insufficient output torque may occur at low speeds (e.g., below 30Hz), while excessive torque may occur at high speeds (e.g., above 100Hz). Therefore, when the compressor speed decreases, the torque compensation coefficient needs to be increased accordingly to enhance the motor output torque and ensure effective drive of the compressor. When the compressor speed increases, the torque compensation coefficient should be decreased to suppress torque overshoot, avoid system oscillation or control instability, and thus achieve stable torque output.

[0041] Step 230: Determine the basic torque compensation coefficient based on the first ratio and the second ratio.

[0042] Understandably, by simultaneously considering the two key influencing factors of load level (characterized by the first ratio of the current pressure difference to the rated pressure difference) and speed level (characterized by the second ratio of the current speed to the rated speed), the determined basic torque compensation coefficient can more comprehensively reflect the basic drive requirements of the compressor under the current operating conditions, thereby more accurately matching the actual required drive torque and significantly improving the accuracy of the initial stage of torque compensation.

[0043] Optional, such as Figure 3 As shown, step 230, determining the basic torque compensation coefficient based on the first ratio and the second ratio, may specifically include the following steps: Step 231: The product of the first ratio and the preset pressure correction coefficient is determined as the first torque compensation coefficient.

[0044] Step 232: The product of the second ratio and the preset speed correction coefficient is determined as the second torque compensation coefficient.

[0045] Step 233: The sum of the first torque compensation coefficient and the second torque compensation coefficient is determined as the basic torque compensation coefficient.

[0046] In this embodiment, the basic torque compensation coefficient is calculated using the following formula (1): (1) In the formula, Indicates the basic torque compensation coefficient. This indicates the preset pressure correction factor. Indicates the current pressure difference. Indicates the preset rated pressure difference. This indicates the preset speed correction coefficient. This indicates the current speed of the compressor. This indicates the preset rated speed.

[0047] Among them, the preset pressure correction coefficient Represents the pressure difference compensation weight, preset speed correction coefficient Represents the speed compensation weight. and The sum equals 1. In this embodiment, The value is 0.6. The value is 0.4. It should be noted that under low load conditions (i.e., pressure difference ΔP < 0.5 MPa), the value can be reduced. (For example, decrease to 0.4), and increase (For example, increase to 0.6); conversely, under high load conditions, it can be increased. and reduce This enables dynamic adaptation of torque compensation under different load conditions.

[0048] Among them, the preset rated pressure difference This refers to the compressor's rated pressure difference; for example, the compressor's rated pressure difference at the time of manufacture is 2.5 MPa.

[0049] Among them, the preset rated speed This refers to the compressor's rated speed; for example, at the factory, with a power supply frequency of 60 Hz, the corresponding rated speed is 3600 r / min.

[0050] It should be noted that the basic torque compensation coefficient is limited to a preset range (e.g., 0.8 to 1.2). After calculating the sum of the first and second torque compensation coefficients, if the sum falls within the preset range, it is used as the basic torque compensation coefficient; if the sum is less than the lower limit of the preset range (e.g., 0.8), the lower limit is used as the basic torque compensation coefficient; if the sum is greater than the upper limit of the preset range (e.g., 1.2), the upper limit is used as the basic torque compensation coefficient. For example, when the sum of the first and second torque compensation coefficients is 0.9, the basic torque compensation coefficient is 0.9; when the sum is 0.7, the basic torque compensation coefficient is limited to 0.8; when the sum is 1.3, the basic torque compensation coefficient is limited to 1.2, thus ensuring that the basic torque compensation coefficient is always within a reasonable and stable range.

[0051] In one embodiment of the present invention, such as Figure 4 As shown, step 300, based on the current operating parameters of the compressor motor, corrects the basic torque compensation coefficient to obtain the target torque compensation coefficient, which may specifically include the following steps: Step 310: Determine the torque compensation correction coefficient based on the current operating parameters of the compressor motor.

[0052] Step 320: Multiply the basic torque compensation coefficient and the torque compensation correction coefficient to determine the target torque compensation coefficient.

[0053] It can be understood that the basic torque compensation coefficient mainly reflects the basic compensation required by the compressor due to the external load (i.e. pressure difference) and the target rotating speed; the actual operating state of the compressor motor (such as performance decline caused by motor heating, current fluctuation) will also directly affect its output efficiency and capacity, therefore, by introducing the current operating parameters of the motor to correct the basic torque compensation coefficient, the target torque compensation coefficient finally obtained can comprehensively reflect the total compensation level required by the compressor at the current moment, so as to realize dynamic and accurate adjustment of torque compensation, and significantly improve the operating stability of the air conditioner under various working conditions.

[0054] Optionally, in the case that the current operating parameters of the compressor motor include the current current of the compressor motor and the current temperature of the compressor motor, as shown in Figure 5 Step 310, based on the current operating parameters of the compressor motor, determining a torque compensation correction coefficient, which can specifically include the following steps: Step 311, based on the current current of the compressor motor and the preset rated current, determining a current variation.

[0055] Among them, the motor (compressor motor) current can reflect the actual output torque level of the motor; during the operation of the fixed-frequency motor, the current and the output torque are approximately positively correlated. When the current is detected to be too low, it indicates that the output torque is insufficient, which is easy to cause the load fluctuation to intensify, at this time, the torque compensation coefficient needs to be increased to supplement the required torque; on the contrary, when the current is too high, it indicates that the motor may be in an overload state, which will also cause load instability, at this time, the torque compensation coefficient should be reduced to suppress the torque output and prevent the motor from overloading, so as to maintain the stability and safety of the system operation.

[0056] It can be understood that by monitoring the change of the motor current in real time, the actual load state of the compressor motor can be accurately reflected, and the current is the most direct external representation of the motor load, so that the torque compensation is more in line with the actual working condition.

[0057] Step 312, based on the current temperature of the compressor motor and the preset temperature, determining a temperature variation.

[0058] Among them, the increase of motor temperature will cause the increase of winding resistance, and then cause the increase of copper loss and the decrease of electromagnetic torque output capacity; at the same time, high temperature will also intensify the risk of magnet demagnetization (especially in permanent magnet motor), further weakening the effective output torque. Therefore, when the motor temperature is detected to be higher than the normal range, the torque compensation coefficient needs to be appropriately increased to compensate for the torque attenuation caused by thermal effect. It should be noted that when the motor temperature is within the normal working range, the torque compensation coefficient can be adjusted according to the current load state according to the conventional method.

[0059] It can be understood that, considering that key parameters such as winding resistance and permanent magnet magnetic properties of the compressor motor change with temperature, by introducing monitoring of the temperature change amount, the motor performance degradation (such as torque output capability reduction) caused by temperature rise can be compensated, ensuring that the compressor can stably output under different temperature conditions, while playing a role in overheat protection, prolonging the service life and reliability of the motor.

[0060] Step 313, based on the current change amount and the temperature change amount, determine the torque compensation correction coefficient.

[0061] It can be understood that, by comprehensively considering the current factor reflecting the load change and the temperature factor reflecting the motor state change, the torque compensation correction coefficient is obtained, which can more comprehensively and accurately dynamically adjust the basic torque compensation coefficient, so that the final target torque compensation coefficient can adapt to external load fluctuations and motor internal state changes, thereby improving the stability of the air conditioner operation.

[0062] Optionally, step 311, based on the current current of the compressor motor and the preset rated current, determine the current change amount, which can specifically include the following contents: The difference between the preset rated current and the current current of the compressor motor is determined as the first difference value; the ratio of the first difference value to the preset rated current is determined as the current change amount.

[0063] Optionally, step 312, based on the current temperature of the compressor motor and the preset temperature, determine the temperature change amount, which can specifically include the following contents: The difference between the current temperature of the compressor motor and the preset temperature is determined as the second difference value; the ratio of the second difference value to the preset temperature is determined as the temperature change amount.

[0064] Optionally, step 313, based on the current change amount and the temperature change amount, determine the torque compensation correction coefficient, which can specifically include the following contents: The product of the current change amount and the preset current correction coefficient is determined as the third torque compensation coefficient; the product of the temperature change amount and the preset temperature correction coefficient is determined as the fourth torque compensation coefficient; the sum of the third torque compensation coefficient, the fourth torque compensation coefficient and 1 is determined as the torque compensation correction coefficient.

[0065] In this embodiment, the torque compensation correction coefficient is calculated by the following formula (2): (2) In the formula, K represents the torque compensation correction coefficient, K1 represents the preset current correction coefficient, I0 represents the preset rated current, I represents the current current of the compressor motor, This indicates the preset temperature correction factor. This indicates the current temperature of the compressor motor. This indicates the preset temperature.

[0066] Among them, the preset current correction coefficient This represents the compensation range for the current deviation; in this embodiment, The value is 0.3.

[0067] Preset temperature correction factor This represents the compensation range for temperature deviation; in this embodiment, The value is 0.2.

[0068] Preset rated current The rated current of the motor (compressor motor); for example, the rated current of the motor at the time of manufacture is 5A (amps).

[0069] preset temperature This refers to the normal stator temperature of the motor; for example, the stator temperature of the motor is 50℃.

[0070] For example, the target torque compensation coefficient is calculated using the following formula (3): (3) In the formula, This represents the target torque compensation coefficient.

[0071] It should be noted that the torque compensation correction coefficient is limited to a preset range (e.g., 0.9 to 1.1). After calculating the sum of the third torque compensation coefficient, the fourth torque compensation coefficient, and 1, if the sum falls within the preset range, the sum is used as the torque compensation correction coefficient; if the sum is less than the lower limit of the preset range (e.g., 0.9), the lower limit value is used as the torque compensation correction coefficient; if the sum is greater than the upper limit of the preset range (e.g., 1.1), the upper limit value is used as the torque compensation correction coefficient.

[0072] It should be noted that the pressure difference ( ), motor current ( ), speed ( ) and motor temperature ( It collects data in real time with a sampling period of no more than 100 milliseconds (ms); this high sampling frequency can quickly capture the dynamic change trend of the load, identify changes in operating conditions in time before significant fluctuations in torque demand, thereby providing data support for torque compensation, realizing early compensation response, and effectively improving the system's ability to suppress transient disturbances.

[0073] In one embodiment of the present invention, such as Figure 6As shown, step 320, multiplying the product of the basic torque compensation coefficient and the torque compensation correction coefficient to determine the target torque compensation coefficient, can specifically include the following steps: Step 321, multiplying the product of the basic torque compensation coefficient and the torque compensation correction coefficient to determine the initial torque compensation coefficient.

[0074] Step 322, comparing the initial torque compensation coefficient and the preset torque compensation coefficient interval.

[0075] Wherein, in order to avoid excessive compensation leading to unstable operation, the preset torque compensation coefficient interval is [0.7, 1.3].

[0076] Step 323, in the case where the initial torque compensation coefficient is in the preset torque compensation coefficient interval, the initial torque compensation coefficient is determined as the target torque compensation coefficient.

[0077] Step 324, in the case where the initial torque compensation coefficient is less than the low torque compensation coefficient threshold of the preset torque compensation coefficient interval, the low torque compensation coefficient threshold is determined as the target torque compensation coefficient.

[0078] It can be understood that too low torque compensation may lead to insufficient compressor output torque, which cannot overcome the load and friction, thereby causing problems such as running out of step, vibration and even shutdown. Based on this, by setting a compensation lower limit (low torque compensation coefficient threshold), the embodiment can effectively avoid too low torque compensation caused by calculation deviation or special working conditions, thereby ensuring that the compressor can obtain the most basic stable operation torque even in the case of light load or small calculation value, so as to ensure the stability and reliability of the compressor operation.

[0079] Step 325, in the case where the initial torque compensation coefficient is greater than the high torque compensation coefficient threshold of the preset torque compensation coefficient interval, the high torque compensation coefficient threshold is determined as the target torque compensation coefficient.

[0080] It can be understood that excessive torque compensation will cause a sharp impact on the current, which may lead to winding overheating, mechanical structure over-stress, severe vibration and noise, and even damage to the compressor or trigger protection. Based on this, by setting a compensation upper limit (high torque compensation coefficient threshold), the embodiment can effectively limit the torque compensation amount, prevent the compensation coefficient from being too large due to external load mutation or system abnormality, thereby avoiding the risk of over-compensation, enhancing the safety of the overall operation of the air conditioner, and prolonging the service life of the equipment.

[0081] In an embodiment of the present application, step 100, obtaining the current pressure difference between the current discharge pressure and the current suction pressure of the compressor, can specifically include the following steps: acquiring a current operating frequency of the compressor; and acquiring a current pressure difference between a current discharge pressure and a current suction pressure of the compressor when the current operating frequency is less than or equal to a preset compensation frequency.

[0082] It can be understood that the step of acquiring the current pressure difference between the current discharge pressure and the current suction pressure of the compressor is executed under the condition that the current operating frequency of the compressor is less than or equal to the preset compensation frequency; in this way, the compensation calculation can be applied to the low-frequency operating range where vibration and step loss are most likely to occur, unnecessary intervention and calculation in the high-frequency range where the compressor is stably operating can be avoided, and the operation burden and overall power consumption of the system can be reduced.

[0083] It should be noted that when the current operating frequency of the compressor is higher than the preset compensation frequency, the compressor is in a high-frequency operating state, at which the load characteristics are relatively stable, the electromagnetic torque fluctuation is small, and the system itself has good dynamic response capability. Under this working condition, no additional torque compensation is needed, which can not only prevent the increase of energy consumption or mechanical vibration caused by over-compensation, but also improve the working reliability of the air conditioner in the entire operating frequency range.

[0084] In an embodiment of the present application, the step 400 can specifically include the following contents: Based on the determined target torque compensation coefficient, the corresponding target torque compensation amount is calculated in combination with the current operating state (such as motor current, speed or load demand) of the compressor; then, the compensation amount is superimposed to the basic torque instruction or directly used to adjust the output current / voltage of the frequency converter, so as to dynamically adjust the actual output torque of the compressor motor to match the load demand under the current working condition.

[0085] It should be noted that the present embodiment adopts a gradual correction strategy to adjust the torque compensation coefficient, that is, the adjustment amplitude of each update is not more than 5% of the current value (for example, the compensation coefficient is adjusted from 1.0 to 1.05), so as to avoid the step change of the motor output torque caused by the sudden change of the compensation coefficient, effectively suppress the torque impact of the compressor in the compensation process, thereby significantly reducing the mechanical vibration and operating noise caused thereby, and improving the smoothness of system control and user experience.

[0086] In an embodiment of the present application, after the step 400, the method further includes the following contents: Adjusting the frequency up / down rate of the compressor.

[0087] It can be understood that after the torque compensation and operating near the preset compensation frequency (such as 35 Hz), the frequency up / down rate of the compressor is actively adjusted to realize the smooth transition of system load and avoid the step loss or vibration caused by sudden compensation or dynamic response lag.

[0088] Specifically, during the frequency ramp-up process, when the compressor's operating frequency approaches 35 Hz, the compressor will maintain operation at 35 Hz for approximately 5 seconds (time adjustable), then ramp up to 36 Hz and stabilize for another 5 seconds (time adjustable), followed by a slower ramp-up rate (1 Hz / second) for 5 seconds, before resuming the normal rapid ramp-up mode (5 Hz / second). During the frequency ramp-down process, because the low-frequency range is more prone to step-out faults, when the frequency drops to 37 Hz, it first stabilizes for 5 seconds, then drops to 36 Hz and extends the stabilization time to 10 seconds (time adjustable), then maintains 35 Hz for another 10 seconds (time adjustable), then drops to 34 Hz ​​and operates for 5 seconds before switching to a slow ramp-down mode (1 Hz / second) until the target operating frequency is reached. Thus, this embodiment's segmented speed control effectively mitigates torque surges and dynamic shocks near the compensation boundary, significantly improving the compressor's operational stability and reliability in the critical frequency region.

[0089] The air conditioner control device provided by the present invention is described below. The air conditioner control device described below can be referred to in correspondence with the air conditioner control method described above.

[0090] A second aspect of the present invention provides an air conditioner control device, such as... Figure 7 As shown, the device includes an acquisition module 710, a determination module 720, a obtaining module 730, and a control module 740; wherein: The acquisition module 710 is used to acquire the current pressure difference between the current discharge pressure and the current suction pressure of the compressor.

[0091] The determination module 720 is used to determine the basic torque compensation coefficient based on the compressor's current speed and current pressure difference.

[0092] The module 730 is used to correct the base torque compensation coefficient based on the current operating parameters of the compressor motor to obtain the target torque compensation coefficient; wherein the current operating parameters of the compressor motor include the current current of the compressor motor and / or the current temperature of the compressor motor.

[0093] The control module 740 is used to determine the target torque compensation amount based on the target torque compensation coefficient and control the compressor to operate based on the target torque compensation amount.

[0094] Figure 8 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 8As shown, the electronic device can include a processor 810, a communications interface 820, a memory 830, and a communications bus 840, wherein the processor 810, the communications interface 820, and the memory 830 complete mutual communication through the communications bus 840. The processor 810 can invoke a logic instruction in the memory 830 to execute an air conditioner control method, which includes: obtaining a current pressure difference between a current discharge pressure and a current suction pressure of a compressor; determining a basic torque compensation coefficient based on a current speed of the compressor and the current pressure difference; correcting the basic torque compensation coefficient based on a current operating parameter of a compressor motor to obtain a target torque compensation coefficient; wherein the current operating parameter of the compressor motor includes a current current of the compressor motor and / or a current temperature of the compressor motor; determining a target torque compensation amount based on the target torque compensation coefficient, and controlling the compressor to operate based on the target torque compensation amount.

[0095] In addition, the logic instruction in the memory 830 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or parts of the present application that essentially contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0096] On the other hand, the present application also provides a computer program product, which includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program is executed by a processor, the computer can execute the air conditioner control method provided by the above-mentioned methods, the method includes: obtaining a current pressure difference between a current discharge pressure and a current suction pressure of a compressor; determining a basic torque compensation coefficient based on a current speed of the compressor and the current pressure difference; correcting the basic torque compensation coefficient based on a current operating parameter of a compressor motor to obtain a target torque compensation coefficient; wherein the current operating parameter of the compressor motor includes a current current of the compressor motor and / or a current temperature of the compressor motor; determining a target torque compensation amount based on the target torque compensation coefficient, and controlling the compressor to operate based on the target torque compensation amount.

[0097] In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the air conditioner control method provided by each of the above methods, and the method comprises: obtaining a current pressure difference between a current discharge pressure and a current suction pressure of the compressor; determining a basic torque compensation coefficient based on a current rotating speed of the compressor and the current pressure difference; correcting the basic torque compensation coefficient based on a current operating parameter of the compressor motor to obtain a target torque compensation coefficient; wherein the current operating parameter of the compressor motor comprises a current current of the compressor motor and / or a current temperature of the compressor motor; determining a target torque compensation amount based on the target torque compensation coefficient, and controlling the compressor to operate based on the target torque compensation amount.

[0098] The device embodiments described above are merely illustrative, wherein the units illustrated as separate components can or can not be physically separated, and the components illustrated as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0099] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and the necessary general hardware platform, and of course, it can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, server, or network device, etc.) execute the method of each embodiment or some part of the embodiment.

[0100] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An air conditioner control method, characterized in that, include: Obtain the current pressure difference between the compressor's current discharge pressure and current intake pressure; Based on the current speed of the compressor and the current pressure difference, determine the basic torque compensation coefficient; Based on the current operating parameters of the compressor motor, the basic torque compensation coefficient is corrected to obtain the target torque compensation coefficient; wherein, the current operating parameters of the compressor motor include the current current of the compressor motor and / or the current temperature of the compressor motor; The target torque compensation amount is determined based on the target torque compensation coefficient, and the compressor is controlled to operate based on the target torque compensation amount.

2. The air conditioner control method according to claim 1, characterized in that, The determination of the basic torque compensation coefficient based on the compressor's current speed and the current pressure difference includes: The ratio of the current pressure difference to the preset rated pressure difference is determined as the first ratio. The ratio of the current rotational speed to the preset rated rotational speed is determined as the second ratio. The basic torque compensation coefficient is determined based on the first ratio and the second ratio.

3. The air conditioner control method according to claim 2, characterized in that, Based on the first ratio and the second ratio, the basic torque compensation coefficient is determined, including: The product of the first ratio and the preset pressure correction coefficient is determined as the first torque compensation coefficient; The product of the second ratio and the preset speed correction coefficient is determined as the second torque compensation coefficient; The sum of the first torque compensation coefficient and the second torque compensation coefficient is determined as the basic torque compensation coefficient.

4. The air conditioner control method according to claim 1, characterized in that, The step of correcting the basic torque compensation coefficient based on the current operating parameters of the compressor motor to obtain the target torque compensation coefficient includes: Based on the current operating parameters of the compressor motor, determine the torque compensation correction coefficient; The target torque compensation coefficient is determined by multiplying the basic torque compensation coefficient and the torque compensation correction coefficient.

5. The air conditioner control method according to claim 4, characterized in that, The current operating parameters of the compressor motor include the current current and the current temperature of the compressor motor; determining the torque compensation correction coefficient based on the current operating parameters of the compressor motor includes: The change in current is determined based on the current current and the preset rated current of the compressor motor; The temperature change is determined based on the current temperature and the preset temperature of the compressor motor; Based on the changes in current and temperature, a torque compensation correction coefficient is determined.

6. The air conditioner control method according to claim 5, characterized in that, The determination of the current change based on the current current and the preset rated current of the compressor motor includes: The difference between the preset rated current and the current current of the compressor motor is determined as the first difference. The ratio of the first difference to the preset rated current is determined as the change in current. And / or, The determination of the temperature change based on the current temperature and the preset temperature of the compressor motor includes: The difference between the current temperature and the preset temperature of the compressor motor is determined as the second difference. The ratio of the second difference to the preset temperature is determined as the temperature change.

7. The air conditioner control method according to claim 5, characterized in that, The determination of the torque compensation correction coefficient based on the current change and the temperature change includes: The product of the current change and the preset current correction coefficient is determined as the third torque compensation coefficient. The product of the temperature change and the preset temperature correction coefficient is determined as the fourth torque compensation coefficient. The sum of the third torque compensation coefficient, the fourth torque compensation coefficient, and 1 is determined as the torque compensation correction coefficient.

8. The air conditioner control method according to claim 4, characterized in that, The step of determining the target torque compensation coefficient by multiplying the basic torque compensation coefficient and the torque compensation correction coefficient includes: The product of the basic torque compensation coefficient and the torque compensation correction coefficient is determined as the initial torque compensation coefficient; Compare the initial torque compensation coefficient with the preset torque compensation coefficient range; If the initial torque compensation coefficient is within the preset torque compensation coefficient range, the initial torque compensation coefficient is determined as the target torque compensation coefficient. If the initial torque compensation coefficient is less than the low torque compensation coefficient threshold of the preset torque compensation coefficient range, the low torque compensation coefficient threshold is determined as the target torque compensation coefficient. If the initial torque compensation coefficient is greater than the high torque compensation coefficient threshold of the preset torque compensation coefficient range, the high torque compensation coefficient threshold is determined as the target torque compensation coefficient.

9. The air conditioner control method according to any one of claims 1 to 8, characterized in that, The step of obtaining the current pressure difference between the current discharge pressure and the current intake pressure of the compressor includes: Obtain the current operating frequency of the compressor; When the current operating frequency is less than or equal to the preset compensation frequency, the current pressure difference between the current discharge pressure and the current intake pressure of the compressor is obtained.

10. An air conditioner control device, characterized in that, include: The acquisition module is used to acquire the current pressure difference between the current discharge pressure and the current intake pressure of the compressor. The determination module is used to determine the basic torque compensation coefficient based on the current speed of the compressor and the current pressure difference; The module is used to correct the basic torque compensation coefficient based on the current operating parameters of the compressor motor to obtain the target torque compensation coefficient; wherein, the current operating parameters of the compressor motor include the current current of the compressor motor and / or the current temperature of the compressor motor; The control module is used to determine the target torque compensation amount based on the target torque compensation coefficient, and control the compressor to operate based on the target torque compensation amount.

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