Safety protection control method, control device and air conditioner

Abstract

The application provides a safety protection control method, a control device and an air conditioner, and relates to the technical field of air conditioners. The method comprises the following steps: acquiring a current operation mode of the air conditioner and an angle difference between a current inclination angle and an initial inclination angle of the air conditioner; determining whether the air conditioner enters a protection mode and a protection level according to the angle difference; if yes, controlling the air conditioner to enter the protection mode, and adjusting the operation state of the air conditioner according to the protection level and the current operation mode in the protection mode. The method determines whether the air conditioner enters the protection mode and the protection level according to the current operation mode of the air conditioner and the angle difference, and adjusts the operation state of the air conditioner correspondingly, so as to improve the use safety and temperature regulation effect of the air conditioner on the basis of avoiding the damage of the air outlet and the air return port plugging to the motor and the electric auxiliary heating assembly and the fire caused by the temperature rise of the motor and the electric auxiliary heating assembly, and taking into account the current temperature regulation effect of the air conditioner to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a safety protection control method, control device, and air conditioner. Background Technology

[0002] Floor-standing air conditioners are generally used in large spaces. In daily life, accidents or human factors may cause floor-standing air conditioners to tilt or even fall over. When the air conditioner tilts or falls over, causing blockage of its air outlet or return air outlet, the air volume of the air conditioner will drop rapidly. This will not only increase the motor load and current overload, severely shortening its service life, but in severe cases, the motor and electric auxiliary heating components may not be able to dissipate heat effectively, which may even cause abnormal heating inside the air conditioner and lead to spontaneous combustion.

[0003] This means that existing floor-standing air conditioners are prone to damage to the motor and electric auxiliary heating components when tilted or tipped over, and in severe cases, may even cause spontaneous combustion, resulting in poor safety. Summary of the Invention

[0004] The purpose of this invention is to provide a safety protection control method, control device, and air conditioner to solve the technical problem that existing floor-standing air conditioners are prone to damage to the motor and electric auxiliary heating components when tilted or tipped over, and in severe cases, may even cause spontaneous combustion, resulting in poor safety in use.

[0005] To address the above problems, this invention provides a safety protection control method applied to the safety protection of a floor-standing air conditioner that has tilted and fallen over. The method includes:

[0006] Obtain the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle of the air conditioner;

[0007] The angle difference is used to determine whether the air conditioner enters protection mode and the protection level of the protection mode.

[0008] If so, the air conditioner is controlled to enter the protection mode. In the protection mode, the operating status of the air conditioner is adjusted according to the protection level and the current operating mode.

[0009] The safety protection and control method provided by this invention determines whether to enter a protection mode and the protection level by the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle. After determining that the protection mode has been entered, the method adjusts the air conditioner's electrical components accurately and to different degrees based on the probability of blockage of the air supply and return vents as indicated by the protection level, the types of electrical components involved in the current operating mode, and the different characteristic changes caused by the blockage of the air supply and return vents. This effectively avoids the hazards caused by the blockage of the air supply and return vents while also taking into account the temperature regulation effect of the air conditioner to a certain extent. Correspondingly, it ensures the service life of the motor and electric auxiliary heating accessories and the safety of the air conditioner, while also ensuring the temperature regulation function of the air conditioner to a certain extent. This reduces the impact of ineffective adjustment of electrical components when the air supply and return vents are not blocked, thus reducing the impact on the temperature regulation effect of the air conditioner. It also reduces the possibility of damage or even spontaneous combustion of the motor and electric auxiliary heating components due to the weak adjustment effect of the air supply and return vents being blocked.

[0010] Optionally, the step of determining whether the air conditioner enters protection mode and the protection level of the protection mode based on the angle difference includes:

[0011] If the angle difference is greater than or equal to the first angle difference threshold and less than or equal to the second angle difference threshold, then the air conditioner is determined to enter the protection mode, and the protection level of the protection mode is level one.

[0012] If the angle difference is greater than the second angle difference threshold and less than or equal to the third angle difference threshold, then the air conditioner is determined to enter the protection mode, and the protection level of the protection mode is level two.

[0013] If the angle difference is greater than the third angle difference threshold, then the air conditioner is determined to enter the protection mode, and the protection level of the protection mode is level three.

[0014] The first angle difference threshold, the second angle difference threshold, and the third angle difference threshold increase sequentially.

[0015] Optionally, the protection level of the protection mode is Level 1, the current operating mode is cooling mode or heating mode, and the step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode includes:

[0016] The motor is set to low speed.

[0017] Optionally, the protection level of the protection mode is level two, the current operating mode is cooling mode, and the step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode includes:

[0018] The motor is set to low speed.

[0019] Each preset duration is a cycle. The return air velocity and supply air velocity of each cycle are obtained. The return air velocity of the first cycle is called the first return air velocity and the supply air velocity is called the first supply air velocity. The return air velocity of each cycle after the first cycle is called the cycle return air velocity and the supply air velocity is called the cycle supply air velocity.

[0020] If the periodic return air velocity is less than the first return air velocity or the periodic supply air velocity is less than the first supply air velocity, then the motor is controlled to be turned off.

[0021] And / or, if in M ​​consecutive cycles, the return air velocity of the cycle is not less than the first return air velocity and the supply air velocity of the cycle is not less than the first supply air velocity, then the motor is shut down and an alarm is issued; wherein, M≥50.

[0022] Optionally, the protection level of the protection mode is level two, the current operating mode is heating mode, and the step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode includes:

[0023] The motor is set to low speed.

[0024] Each second preset duration is a cycle. The air supply temperature difference between the latter and the former in each two adjacent cycles is obtained. Among the two adjacent air supply temperature differences, the former is the first front air supply temperature difference and the latter is the first rear air supply temperature difference.

[0025] If the temperature difference between the first rear air supply and the first front air supply is greater than 0 and the ratio of the temperature difference between the first rear air supply and the first front air supply is greater than 1, then the motor is shut down.

[0026] And / or, if for X consecutive cycles, the temperature difference of the first rear air supply is greater than 0 and the ratio of the temperature difference of the first rear air supply to the temperature difference of the first front air supply is less than or equal to 1, then the motor is shut down and an alarm is issued; where X≥15;

[0027] And / or, if the temperature difference of the first after-air supply is less than or equal to 0 for Y consecutive cycles, then the motor is shut down and an alarm is issued; where Y > X.

[0028] Optionally, the protection level of the protection mode is Level 1, the current operating mode is electric auxiliary heating mode, and the step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode includes:

[0029] The operating speed of the motor and the electric auxiliary heating component are both set to low.

[0030] Optionally, the protection level of the protection mode is level two, the current operating mode is electric auxiliary heating mode, and the step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode includes:

[0031] Set the motor to low speed and turn off the electric auxiliary heating component;

[0032] Every third preset duration is a cycle. The air supply temperature difference between the latter and the former in each two adjacent cycles is obtained. Among the two adjacent air supply temperature differences, the former is the second front air supply temperature difference and the latter is the second rear air supply temperature difference.

[0033] If the second rear air supply temperature difference is greater than 0 and the ratio of the second rear air supply temperature difference to the second front air supply temperature difference is greater than 1, then control the motor to shut down.

[0034] And / or, if for E consecutive cycles, the second rear air supply temperature difference is greater than 0 and the ratio of the second rear air supply temperature difference to the second front air supply temperature difference is less than or equal to 1, then the motor is shut down and an alarm is issued; where E≥15;

[0035] And / or, if the temperature difference of the second after-air supply is less than or equal to 0 for F consecutive cycles, then the motor is shut down and an alarm is issued; where F > E.

[0036] Optionally, the protection level of the protection mode is level three, the current operating mode is cooling mode, heating mode, or electric auxiliary heating mode, and the step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode includes:

[0037] Control the motor to shut down and disconnect the power supply.

[0038] Optionally, after the air conditioner enters the protection mode, the angle difference of each cycle is obtained every fourth preset time period.

[0039] If the angle difference for N consecutive cycles is less than the first angle difference threshold, then control the air conditioner to exit the protection mode.

[0040] Where N≥2.

[0041] The present invention also provides a control device, comprising:

[0042] The acquisition module is used to acquire the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle of the air conditioner.

[0043] The judgment module is used to determine whether the air conditioner has entered the protection mode and the protection level of the protection mode based on the angle difference;

[0044] The control module is used to control the air conditioner to enter the protection mode according to the judgment result. In the protection mode, the operating status of the air conditioner is adjusted according to the protection level and the current operating mode.

[0045] The present invention also provides an air conditioner, including a computer-readable storage medium storing a computer program and a controller, wherein the computer program is read and executed by the controller to implement the above-mentioned safety protection control method.

[0046] The control device and air conditioner provided in this embodiment can both execute the above-mentioned safety protection control method. By determining whether to enter the protection mode and the protection level based on the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle, the operating status of the air conditioner is adjusted accordingly. This is to avoid damage to the motor and electric auxiliary heating components caused by the blockage of the air supply and return air vents, as well as fire caused by the overheating of the motor and electric auxiliary heating components, while also taking into account a certain degree of temperature regulation effect of the air conditioner, thereby improving the safety and temperature regulation effect of the air conditioner. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0048] Figure 1 This is a flowchart illustrating the first security protection control method provided according to an embodiment of the present invention;

[0049] Figure 2 This is a partial flowchart illustrating a second safety protection control method provided according to an embodiment of the present invention;

[0050] Figure 3 A partial flowchart illustrating the third safety protection and control method provided in this embodiment of the invention;

[0051] Figure 4 A partial flowchart illustrating the fourth safety protection and control method provided in this embodiment of the invention;

[0052] Figure 5 A partial flowchart illustrating the fifth safety protection and control method provided in this embodiment of the invention;

[0053] Figure 6 This is a schematic diagram of the structure of a control device provided according to an embodiment of the present invention.

[0054] Explanation of reference numerals in the attached figures:

[0055] 61-Acquisition module; 62-Judgment module; 63-Control module. Detailed Implementation

[0056] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0057] Figure 1 This is a flowchart illustrating a first safety protection control method provided according to an embodiment of the present invention. Figure 1 As shown, the safety protection and control method includes:

[0058] The air conditioner is turned on and running.

[0059] S102 obtains the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle of the air conditioner.

[0060] The operation of the air conditioner includes a cooling mode, a heating mode in which only the indoor evaporator heats, and an electric auxiliary heating mode in which both the indoor evaporator and the electric auxiliary heating component heat. When the air conditioner is placed normally, the angle between its center of gravity and the vertical direction is the initial tilt angle. In this state, the air return vent and the air supply vent of the air conditioner are not obstructed. The angle between the air conditioner's center of gravity and the vertical direction in its current state is the current tilt angle. The difference between the current tilt angle and the initial tilt angle is the angle difference.

[0061] S104 determines whether the air conditioner enters protection mode and the protection level of the protection mode based on the angle difference.

[0062] The magnitude of the angle difference can characterize the degree of tilt of the air conditioner relative to its initial position. Specifically, the greater the angle difference, the greater the current tilt of the air conditioner, and the greater the probability that the air conditioner's return air vent and supply air vent will be blocked by surrounding objects or that the air conditioner is about to tip over, causing the return air vent and supply air vent to be blocked. Therefore, the current tilt of the air conditioner and the probability that its return air vent and supply air vent will be blocked can be determined based on the magnitude of the angle difference. Specifically, when the angle difference is small, it indicates that the air conditioner is tilted very little and there is no risk of tipping over. The chance of the air conditioner's return air vent and supply air vent being blocked is very small, and it will hardly affect the motor and electric auxiliary heating components. The air conditioner can maintain its current operating state without entering the protection mode. When the angle difference is large, it indicates that the air conditioner is tilted more, and the air conditioner's supply air vent and return air vent may be blocked, or the air conditioner may be at risk of tipping over, causing the supply air vent and return air vent to be blocked. Correspondingly, the motor and electric auxiliary heating components may be damaged. Therefore, it is necessary to enter the protection mode to control and protect it. At the same time, the protection level of the protection mode is determined according to the tilt degree indicated by the angle difference. The higher the protection level, the greater the chance of the supply air vent and return air vent being blocked, and the greater the degree of protection and adjustment of the air conditioner's operating state in the corresponding protection mode.

[0063] If S106 is correct, the air conditioner will be controlled to enter the protection mode. In the protection mode, the operating status of the air conditioner will be adjusted according to the protection level and the current operating mode.

[0064] Air conditioners operate with different electrical components in different modes. Specifically, the motor needs to be started in cooling, heating, and electric auxiliary heating modes, while the electric auxiliary heating component only needs to be started in electric auxiliary heating mode. Furthermore, the characteristic changes caused by blockages in the air conditioner's return and supply air vents differ across operating modes. After entering the protection mode, the air conditioner's electrical components are pre-emptively monitored based on the probability of blockage at the supply and return air vents as indicated by the protection level, the types of electrical components involved in the current operating mode, and the different characteristic changes caused by blockages in the return and supply air vents. Accurate and varying degrees of adjustment can effectively avoid the harm caused by blocked air supply and return vents, while also taking into account the temperature regulation effect of the air conditioner to a certain extent. This ensures the service life of the motor and electric auxiliary heating accessories, as well as the safety of the air conditioner. It also guarantees the temperature regulation function of the air conditioner to a certain extent, reducing the impact of ineffective adjustment of electrical components due to unblocked air supply and return vents, and preventing damage or even spontaneous combustion of the motor and electric auxiliary heating components due to weak adjustment effect caused by blocked air supply and return vents.

[0065] Specifically, the initial tilt angle and current tilt angle of the air conditioner can be detected and obtained by installing a gyroscope or other angular motion measuring device inside the air conditioner.

[0066] Specifically, step S104, which determines whether the air conditioner has entered protection mode and the protection level of protection mode based on the angle difference, includes: if the angle difference is greater than or equal to the first angle difference threshold and less than or equal to the second angle difference threshold, then the air conditioner is determined to have entered protection mode, and the protection level of protection mode is level one; if the angle difference is greater than the second angle difference threshold and less than or equal to the third angle difference threshold, then the air conditioner is determined to have entered protection mode, and the protection level of protection mode is level two; if the angle difference is greater than the third angle difference threshold, then the air conditioner is determined to have entered protection mode, and the protection level of protection mode is level three; wherein the first angle difference threshold, the second angle difference threshold, and the third angle difference threshold increase sequentially.

[0067] When the angle difference is less than the first angle difference threshold, it indicates that the air conditioner's tilt is very small and there is no risk of tipping over. The probability of the air conditioner's return air vent and supply air vent being blocked is very small, and it will hardly affect the motor and electric auxiliary heating components. The air conditioner can maintain its current operating state and does not need to enter the protection mode. When the angle difference is greater than or equal to the first angle difference threshold and less than or equal to the second angle difference threshold, it indicates that the air conditioner has a tendency to sway and tilt. Although the air conditioner's supply air vent and return air vent are not blocked when it is within the tilt range, the air conditioner may tilt further or return to its initial position. If the air conditioner tilts further, it may block the supply air vent and return air vent. Therefore, the air conditioner enters the protection mode, and the protection level is the lowest level, which prevents the air conditioner from tilting further and causing harm, while also taking into account the current temperature regulation efficiency of the air conditioner. When the angle difference is greater than the second angle difference threshold and less than or equal to the third angle difference threshold, it indicates that the air conditioner has tilted and is likely to continue tilting or even tip over, resulting in a high probability of the air supply and return vents being blocked. Therefore, the air conditioner enters protection mode at level two, which offers a higher degree of adjustment to the air conditioner's operation compared to level one. This level provides a greater degree of protection against the danger of the air conditioner tipping over, but its temperature regulation effect is somewhat reduced. When the tilt angle is greater than the third angle difference threshold, it indicates that the air conditioner is about to tip over, and the air supply and return vents will also be blocked. Therefore, the air conditioner enters protection mode at level three, which offers the highest degree of adjustment to the air conditioner's operation. In this case, the temperature regulation effect of the air conditioner is not considered; only the danger of the blocked air supply and return vents is considered to effectively ensure the service life of the motor and auxiliary heating components, as well as the safety of the air conditioner.

[0068] Specifically, the first angle difference threshold ranges from 0.5° to 1.5°, preferably 1°; the second angle difference threshold ranges from 1.5° to 2.5°, preferably 2°; and the third angle difference threshold ranges from 18° to 22°, preferably 20°.

[0069] Optionally, in this embodiment, the protection level of the protection mode is level one, and the current operating mode is cooling mode or heating mode. In step S106, the step of adjusting the operating status of the air conditioner according to the protection level and the current operating mode includes: controlling the motor to operate at a low speed. Level 1 protection indicates that the air conditioner has a tendency to shake and tilt, but the tilt is small, and the air supply and return vents are not yet blocked. However, the air conditioner may tilt further, which could lead to blockage of the air supply and return vents, or it may return to its initial position. Simultaneously, in cooling or heating mode, the motor runs while the electric auxiliary heating component is off. Therefore, the motor is controlled to operate at a low speed to allow the air conditioner to continue regulating the indoor temperature to a certain extent in its current state. This effectively avoids damage to the motor caused by continued tilting leading to blockage of the air supply and return vents, thereby improving the motor's lifespan, the air conditioner's safety, and ensuring a certain degree of temperature regulation effectiveness. It also reduces the likelihood of the air conditioner completely shutting off due to slight shaking, affecting its temperature regulation effect, or the air conditioner tilting or even tipping over without adjustment protection, potentially leading to rapid tilting and falling, blocking the air supply and return vents, and damaging the motor.

[0070] In this embodiment, the protection level of the protection mode is level two, and the current operating mode is cooling mode. The step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode in S106 includes: controlling the motor to operate at a low speed; acquiring the return air speed and supply air speed for each cycle, where the return air speed of the first cycle is the first return air speed and the supply air speed is the first supply air speed, and the return air speed of each cycle after the first cycle is the cycle return air speed and the supply air speed is the cycle supply air speed; if the cycle return air speed is less than the first return air speed or the cycle supply air speed is less than the first supply air speed, then controlling the motor to shut down and issuing an alarm.

[0071] In cooling mode, the motor runs while the electric auxiliary heating component is off. The protection level is level two, indicating that the air conditioner has already tilted and there is a high probability that it will tilt further or even fall over. Correspondingly, the air supply vent and return vent are at risk of being blocked in the current state. Therefore, the motor is first controlled to run at a low speed to avoid damage to the motor caused by possible blockage of the air supply vent and return vent, and to enable the air conditioner to continue to regulate the indoor temperature to a certain extent in the current state.

[0072] In cooling mode, blockage of the air supply and return vents significantly alters the airflow speed. Airflow speed can accurately characterize the blockage status of the air supply and return vents. Therefore, after the motor runs at a low speed, the air supply and return airflow speeds of the air conditioner are periodically monitored to determine the blockage status. Specifically, the return airflow speed and supply airflow speed are acquired as the first return airflow speed and the first supply airflow speed for the first cycle. Subsequently, the return airflow speed and supply airflow speed are acquired every first preset time interval as the periodic return airflow speed and periodic supply airflow speed for the second cycle, the third cycle, and so on. Since the air conditioner has just... When entering the secondary protection mode, that is, when the motor is running at a low speed, the air supply and return air vents are not yet blocked. The corresponding first air supply speed and first return air speed are the air speeds when the air conditioner is running normally. When the return air speed in subsequent cycles is lower than the first return air speed, it indicates that the air conditioner's return air vent is blocked due to further tilting of the air conditioner; or when the air supply speed in a cycle is lower than the first air supply speed, it indicates that the air conditioner's air supply vent is blocked due to further tilting of the air conditioner. When the controller receives the corresponding information, it will control the motor to shut down in a fast response to protect the motor.

[0073] If, for M consecutive cycles, the cycle return air velocity is not less than the first return air velocity and the cycle supply air velocity is not less than the first supply air velocity, then the motor is shut off; where M ≥ 50. When the cycle return air velocity obtained from M consecutive cycles is greater than or equal to the first return air velocity and the cycle supply air velocity is greater than or equal to the first supply air velocity, it indicates that the return air velocity and supply air velocity of the air conditioner have not decreased. Correspondingly, the return air vent and supply air vent are not blocked. However, since the air conditioner has been in a state of significant tilt for some time, there is still a risk of tipping over, and the user has not yet adjusted this potential hazard. Therefore, the motor is shut off to prevent further tilting or even tipping of the air conditioner, which could lead to blockage of the return air vent and supply air vent, causing damage to the motor. An alarm is also triggered to remind the user to adjust the current potential tipping hazard of the air conditioner, thereby further improving the safety of the air conditioner.

[0074] Specifically, the first preset duration can be 25s to 35s, preferably 30s; M≥50. If M can be 60, then after 30 minutes, if the periodic return air velocity is still not greater than the first return air velocity or the periodic supply air velocity is not greater than the first supply air velocity, the motor will be shut down and an alarm will be issued. Specifically, wind speed sensors can be installed at both the return air inlet and the supply air inlet to detect and acquire the supply air velocity and return air velocity.

[0075] Optionally, in this embodiment, the protection level of the protection mode is level two, and the current operating mode is heating mode. The step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode in S106 includes: controlling the motor to operate at a low speed; every second preset time period is a cycle, obtaining the air supply temperature difference between the latter and the former in each two adjacent cycles, and in the two adjacent air supply temperature differences, the former is the first front air supply temperature difference and the latter is the first rear air supply temperature difference; if there is a first rear air supply temperature difference greater than 0 and the ratio of the first rear air supply temperature difference to the first front air supply temperature difference is greater than 1, then control the motor to be turned off.

[0076] In the secondary protection mode, the air supply vent and return vent are at risk of being blocked. Therefore, the motor is first controlled to run at a low speed to avoid damage to the motor caused by possible blockage of the air supply vent and return vent, and to allow the air conditioner to continue to regulate the indoor environment to a certain extent in the current state. In heating mode, the blockage of the air supply and return vents has a significant impact on the air supply temperature. The air supply temperature can accurately represent the blockage status of the air supply and return vents. Therefore, after the motor runs at a low speed, the air supply temperature of the air conditioner is periodically detected to determine the blockage status of the air supply and return vents. Specifically, every second preset time period is one cycle. The air supply temperature of each cycle is obtained, and the air supply temperature difference between the air supply temperature of the later cycle and the air supply temperature of the previous cycle is calculated in every two adjacent cycles. During the detection process, if the first subsequent air supply temperature difference is greater than zero and the ratio of the first subsequent air supply temperature difference to the first preceding air supply temperature difference is greater than 1, that is, in two adjacent cycles, the air supply temperature of the later cycle is higher than the temperature of the previous cycle, and at the same time, the rate of increase of the air supply temperature in the later cycle is greater than that in the previous cycle, it indicates that at least one of the air supply and return vents is blocked, and the temperature inside the air conditioner is showing a rapid upward trend. The motor is then shut down accordingly to quickly protect the motor.

[0077] If, for X consecutive cycles, the temperature difference between the first rear air supply and the first front air supply are both greater than 0 and the ratio of the first rear air supply temperature difference to the first front air supply temperature difference is both less than or equal to 1, the motor will be shut down and an alarm will be issued; where X ≥ 15. With the motor running at a low speed, when the temperature difference between the first rear air supply and the first front air supply are both greater than 0 and the ratio of the first rear air supply temperature difference to the first front air supply temperature difference is both less than or equal to 1, it indicates that although the air supply temperature is continuously rising, the rate of temperature increase is slow. Although the air supply or return air vents are blocked, the risk is relatively small. If, after X consecutive cycles, the air supply temperature still exhibits the above-mentioned temperature rise characteristics, it indicates that the air supply and return air vents are still blocked, and the user has not adjusted the tilt of the air conditioner. Therefore, the motor will be shut down to prevent further heating and damage to its lifespan and the air conditioner. An alarm will also prompt the user to adjust the current potential tilting hazard of the air conditioner, thereby further improving the safety of the air conditioner. Specifically, the second preset duration can be 25s to 35s, preferably 30s; X≥15. If X can be 20, then after entering the secondary protection mode for 10 minutes, if the temperature difference of the first rear air supply continues to be greater than 0 and the ratio of the temperature difference of the first rear air supply to the temperature difference of the first front air supply continues to be less than or equal to 1, then the motor will be shut down and an alarm will be issued.

[0078] If the first rear air supply temperature difference is less than or equal to 0 for Y consecutive cycles, the motor will be shut down and an alarm will be issued; where Y > X. With the motor running at a low speed, when the first rear air supply temperature difference is less than or equal to 0, it indicates that the supply air temperature is not rising, meaning the supply and return air vents are not blocked. However, since the air conditioner has been tilted significantly for a considerable period, there is still a risk of tipping over, and the user has not yet addressed this hazard. Therefore, the motor will be shut down to prevent further tilting or even tipping over, which could lead to blockage of the supply and return air vents and damage to the motor. An alarm will also alert the user to address the potential tipping hazard, thereby further improving the safety of the air conditioner. Specifically, Y can be set to 60, meaning that after 30 minutes in the secondary protection mode, if the first rear air supply temperature difference remains less than or equal to 0, the motor will be shut down and an alarm will be issued.

[0079] Specifically, a temperature sensor can be installed at the air outlet to detect and obtain the air supply temperature.

[0080] Optionally, in this embodiment, the protection level of the protection mode is Level 1, and the current operating mode is electric auxiliary heating mode. Step S106, adjusting the air conditioner's operating state according to the protection level and the current operating mode, includes: controlling the motor's operating speed to low and the electric auxiliary heating component's operating speed to low. In Level 1 protection mode, neither the air supply vent nor the return air vent is blocked, but the air conditioner may continue to tilt, potentially causing the air supply vent and return air vent to become blocked. In electric auxiliary heating mode, both the motor and the electric auxiliary heating component are in operation. Therefore, controlling both the motor and the electric auxiliary heating component to operate at low speed allows the air conditioner to continue heating the indoor environment to a certain extent in its current state. This effectively avoids damage to the motor and electric auxiliary heating component caused by the air supply vent and return air vent becoming blocked due to continued tilting of the air conditioner. This improves the service life of the motor and the electric auxiliary heating component, reduces the occurrence of spontaneous combustion of the motor or the electric auxiliary heating component due to overheating, and correspondingly improves the safety of the air conditioner, while also ensuring the air conditioner's temperature regulation effect to a certain extent.

[0081] Specifically, in this embodiment, the protection level of the protection mode is level two, the current operating mode is electric auxiliary heating mode, and the step of adjusting the operating state of the air conditioner according to the protection level and the current operating mode in S106 includes: controlling the motor to operate at a low speed and turning off the electric auxiliary heating component; every third preset time period is a cycle, obtaining the air supply temperature difference between the latter and the former in every two adjacent cycles, and in the two adjacent air supply temperature differences, the former is the second front air supply temperature difference and the latter is the second rear air supply temperature difference; if there is a second rear air supply temperature difference greater than zero and the ratio of the second rear air supply temperature difference to the second front air supply temperature difference is greater than 1, then control the motor to turn off. In the secondary protection mode, the air supply and return air vents are at risk of being blocked. Therefore, the motor is first controlled to run at a low speed and the electric auxiliary heating component is turned off to completely avoid the potential fire hazard caused by the electric auxiliary heating component due to possible blockage of the air supply and return air vents. At the same time, it can also avoid damage to the motor caused by possible blockage of the air supply and return air vents to a certain extent, and allow the air conditioner to continue to regulate the indoor environment to a certain extent in the current state.

[0082] In heating mode, blockage of the air supply and return vents significantly affects the air supply temperature. The air supply temperature accurately reflects the blockage status of the air supply and return vents. Therefore, after shutting down the electric auxiliary heating component and running the motor at a low speed, the air supply temperature of the air conditioner is periodically monitored to determine the blockage status of the air supply and return vents. Specifically, every third preset time period constitutes one cycle. The air supply temperature of each cycle is obtained, and the air supply temperature difference between the latter and former cycles is calculated for each pair of adjacent cycles. During the monitoring process, if the second subsequent air supply temperature difference is greater than zero and the ratio of the second subsequent air supply temperature difference to the second preceding air supply temperature difference is greater than 1, that is, in two adjacent cycles, the air supply temperature of the latter cycle is higher than the temperature of the former cycle, and at the same time, the rate of increase of the air supply temperature in the latter cycle is greater than that in the former cycle, it indicates that at least one of the air supply and return vents is blocked, and the temperature inside the air conditioner is rising rapidly. Accordingly, the motor is shut down to quickly protect the motor.

[0083] If, for E consecutive cycles, the second rear air supply temperature difference is greater than 0 and the ratio of the second rear air supply temperature difference to the second front air supply temperature difference is less than or equal to 1, the motor will be shut down and an alarm will be issued; where E ≥ 15. With the electric auxiliary heating component already off and the motor running at low speed, when the second rear air supply temperature difference is greater than 0 and the ratio of the second rear air supply temperature difference to the second front air supply temperature difference is less than or equal to 1, it indicates that although the air supply temperature continues to rise, the rate of temperature increase is slow. Although the air supply or return air vents are blocked, the risk is relatively small. If, after E consecutive cycles, the air supply temperature still exhibits the above-mentioned temperature rise characteristics, it indicates that the air supply and return air vents are still blocked, and the user has not adjusted the tilt of the air conditioner. Therefore, the motor will be shut down to prevent further heating and damage to its lifespan and the air conditioner. An alarm will also prompt the user to adjust the current tilting hazard of the air conditioner, thereby further improving the safety of air conditioner use. Specifically, the third preset duration can be 25s to 35s, preferably 30s; E≥15. If E can be 20, then after entering the secondary protection mode for 10 minutes, if the second rear air temperature difference is continuously greater than 0 and the ratio of the second rear air temperature difference to the second front air temperature difference is continuously less than or equal to 1, then the motor will be shut down and an alarm will be issued.

[0084] If the second rear air supply temperature difference is less than or equal to 0 for F consecutive cycles, the motor will be shut down and an alarm will be issued; where F > E. With the electric auxiliary heating component already off and the motor running at a low speed, when the second rear air supply temperature difference is less than or equal to 0, it indicates that the supply air temperature is not rising, meaning the supply and return air vents are not blocked. However, since the air conditioner has been tilted significantly for a considerable period, there is still a risk of tipping over, and the user has not yet addressed this hazard. Therefore, the motor will be shut down to prevent further tilting or even tipping over, which could lead to blockage of the supply and return air vents and damage to the motor. An alarm will also alert the user to address the potential tipping hazard, thereby further improving the safety of the air conditioner. Specifically, F can be set to 60, meaning that after 30 minutes in the secondary protection mode, if the second rear air supply temperature difference remains less than or equal to 0, the motor will be shut down and an alarm will be issued.

[0085] Optionally, in this embodiment, the protection level of the protection mode is level three, and the current operating mode is cooling mode, heating mode, or electric auxiliary heating mode. The step in S106, which adjusts the air conditioner's operating state according to the protection level and the current operating mode, includes: controlling the motor to shut down and cutting off the power supply. A protection level of three indicates that the air conditioner is about to tip over, and the air inlet and outlet are already blocked or about to be blocked. Accordingly, the motor is shut down, the electric auxiliary heating component is in the off state, and the power supply is cut off, thereby effectively reducing damage to the motor and electric auxiliary heating component caused by the blockage of the air inlet and outlet, as well as fires caused by the increased temperature of the motor and electric auxiliary heating component, thus effectively ensuring the safety of the air conditioner.

[0086] Preferably, in the above control methods, an alarm can be issued simultaneously when the motor is turned off, so as to improve the warning and reminder effect on the user.

[0087] In this embodiment, for any of the cooling, heating, and electric auxiliary heating modes, after the air conditioner enters the protection mode, the angle difference is acquired every fourth preset time period as a cycle. If the angle difference for N consecutive cycles is less than the first angle difference threshold, the air conditioner is controlled to exit the protection mode; where N≥2. When the angle difference is greater than or equal to the first angle difference threshold and the air conditioner is controlled to enter the protection mode, the angle difference between the current tilt angle and the initial tilt angle of the air conditioner is acquired again. When the angle difference for multiple consecutive cycles is less than the first angle difference threshold, it indicates that the air conditioner has stably returned to its initial position and can operate normally. There is no longer a risk of blockage in the air supply and return vents. Subsequently, the air conditioner is controlled to exit the protection mode, and the motor and electric auxiliary heating components are controlled to return to their initial operating state, and the air conditioner operates normally. The value range of the fourth preset time period can be 25s to 35s, preferably 30s; N≥2. If N can be 2, then in the protection mode, if the angle difference is less than the first angle difference threshold for 1 minute consecutively, the air conditioner is controlled to exit the protection mode.

[0088] Figure 2 This is a partial flowchart illustrating a second safety protection control method provided according to an embodiment of the present invention. Figure 2 As shown, the method includes:

[0089] The air conditioner is turned on and running.

[0090] S201 obtains the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle of the air conditioner.

[0091] S202 Determine whether the angle difference is greater than or equal to the first angle difference threshold and less than or equal to the second angle difference threshold; if yes, proceed to step S203; if no, proceed to step S204.

[0092] S203 indicates that the air conditioner has entered protection mode and the protection level is Level 1.

[0093] S204 determines whether the angle difference is greater than the second angle difference threshold and less than or equal to the third angle difference threshold. If yes, proceed to step S205; otherwise, proceed to step S206.

[0094] S205 indicates that the air conditioner has entered protection mode and the protection level is level two.

[0095] S206 Determine whether the angle difference is greater than the third angle difference threshold. If yes, proceed to step S207; otherwise, proceed to step S201.

[0096] S207 indicates that the air conditioner has entered protection mode and the protection level is level three.

[0097] Figure 3This is a partial flowchart illustrating the third safety protection and control method provided in an embodiment of the present invention. Figure 3 As shown, the method includes:

[0098] S301 obtains the current operating mode of the air conditioner as cooling mode and the angle difference of the air conditioner.

[0099] S302 determines whether the air conditioner has entered protection mode and the protection level is Level 1 based on the angle difference. If yes, proceed to step S303; otherwise, proceed to step S307.

[0100] The S303 controls the motor to operate at the low gear.

[0101] S304 takes a preset duration of four cycles to obtain the angle difference for each cycle.

[0102] S305 determines whether the angle difference for two consecutive cycles is less than the first angle difference threshold. If yes, proceed to step S306; otherwise, continue with step S303.

[0103] S306 Exit protected mode. Continue with step S301.

[0104] S307 determines whether the air conditioner has entered protection mode and whether the protection level is level two based on the angle difference. If yes, proceed to step S308; otherwise, proceed to step S314.

[0105] The S308 controls the motor to operate at the low gear.

[0106] S309 takes a first preset duration as a cycle, and obtains the first return air velocity and the first supply air velocity of the first cycle, as well as the cycle return air velocity and cycle supply air velocity of each subsequent cycle.

[0107] S310 determines whether there is a periodic return air velocity less than the first return air velocity or a periodic supply air velocity less than the first supply air velocity. If yes, proceed to step S311; otherwise, proceed to step S312.

[0108] S311 controls the motor to shut down.

[0109] S312 determines whether, in M ​​consecutive cycles, the cycle return air velocity is not less than the first return air velocity and the cycle supply air velocity is not less than the first supply air velocity. If yes, then proceed to step S313.

[0110] S313 controls the shutdown of the motor and issues an alarm.

[0111] S314 determines whether the air conditioner has entered protection mode and whether the protection level is level three based on the angle difference. If yes, proceed to step S315; otherwise, proceed to step S301.

[0112] The S315 controls the motor to shut down and disconnect the power supply.

[0113] Figure 4 This is a partial flowchart illustrating the fourth safety protection and control method provided in an embodiment of the present invention. Figure 4 As shown, the method includes:

[0114] S401 obtains the current operating mode of the air conditioner as heating mode and the angle difference of the air conditioner.

[0115] S402 determines whether the air conditioner has entered protection mode and the protection level is Level 1 based on the angle difference. If yes, proceed to step S403; otherwise, proceed to step S407.

[0116] The S403 controls the motor to operate at the low gear.

[0117] S404 takes a preset duration of four cycles to obtain the angle difference for each cycle.

[0118] S405 determines whether the angle difference for two consecutive cycles is less than the first angle difference threshold. If yes, proceed to step S406; otherwise, continue with step S403.

[0119] S406 Exit protected mode. Continue with step S401.

[0120] S407 determines whether the air conditioner has entered protection mode and whether the protection level is level two based on the angle difference. If yes, proceed to step S408; otherwise, proceed to step S415.

[0121] The S408 controls the motor to operate at the low gear.

[0122] S409 takes a second preset duration as a cycle, and obtains the air supply temperature difference between the latter and the former in each two adjacent cycles. Among the two adjacent air supply temperature differences, the former is the first front air supply temperature difference and the latter is the first rear air supply temperature difference.

[0123] S410 determines whether there exists a first rear air supply temperature difference greater than 0 and a ratio of the first rear air supply temperature difference to the first front air supply temperature difference greater than 1. If yes, proceed to step S411; otherwise, proceed to step S412.

[0124] S411 controls the motor to shut down.

[0125] S412 determines whether, for X consecutive cycles, the temperature difference of the first rear air supply is greater than 0 and the ratio of the temperature difference of the first rear air supply to the temperature difference of the first front air supply is less than or equal to 1. If yes, proceed to step S413; otherwise, proceed to step S414.

[0126] S413 controls the shutdown of the motor and issues an alarm.

[0127] S414 determines whether the temperature difference of the first supply air is less than or equal to 0 for Y consecutive cycles. If so, proceed to step S413.

[0128] S415 determines whether the air conditioner has entered protection mode and whether the protection level is level three based on the angle difference. If yes, proceed to step S416; otherwise, proceed to step S401.

[0129] The S416 controls the shutdown of the motor and cuts off the power supply.

[0130] Figure 5 This is a partial flowchart illustrating the fifth safety protection and control method provided in an embodiment of the present invention. Figure 5 As shown, the method includes:

[0131] S501 obtains the current operating mode of the air conditioner as electric auxiliary heating mode and the angle difference of the air conditioner.

[0132] S502 determines whether the air conditioner has entered protection mode and the protection level is Level 1 based on the angle difference. If yes, proceed to step S503; otherwise, proceed to step S507.

[0133] The S503 controls the motor to operate at low speed and the electric auxiliary heating component to operate at low speed.

[0134] S504 takes a preset duration of four cycles to obtain the angle difference for each cycle.

[0135] S505 determines whether the angle difference for two consecutive cycles is less than the first angle difference threshold. If yes, proceed to step S506; otherwise, continue with step S503.

[0136] S506 Exit protected mode. Continue with step S501.

[0137] S507 determines whether the air conditioner has entered protection mode and whether the protection level is level two based on the angle difference. If yes, proceed to step S508; otherwise, proceed to step S515.

[0138] The S508 controls the motor to run at low speed and shuts off the electric auxiliary heating component.

[0139] S509 takes a third preset time period as a cycle, and obtains the air supply temperature difference between the latter and the former in each two adjacent cycles. Among the two adjacent air supply temperature differences, the former is the second front air supply temperature difference and the latter is the second rear air supply temperature difference.

[0140] S510 determines whether there exists a second rear air supply temperature difference greater than 0 and a ratio of the second rear air supply temperature difference to the second front air supply temperature difference greater than 1. If yes, proceed to step S511; otherwise, proceed to step S512.

[0141] S511 controls the motor to shut down.

[0142] S512 determines whether, for E consecutive cycles, the temperature difference of the second rear air supply is greater than 0 and the ratio of the temperature difference of the second rear air supply to the temperature difference of the second front air supply is less than or equal to 1. If yes, proceed to step S513; otherwise, proceed to step S514.

[0143] S513 controls the shutdown of the motor and issues an alarm.

[0144] S514 determines whether the second downstream air temperature difference is less than or equal to 0 for F consecutive cycles. If so, proceed to step S513.

[0145] S515 determines whether the air conditioner has entered protection mode and whether the protection level is level three based on the angle difference. If yes, proceed to step S516; otherwise, proceed to step S501.

[0146] The S516 controls the motor to shut down and disconnect the power supply.

[0147] Figure 6 This is a schematic diagram of the structure of a control device provided according to an embodiment of the present invention. Figure 6 As shown, the control device includes:

[0148] The acquisition module 61 is used to acquire the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle of the air conditioner.

[0149] The judgment module 62 is used to determine whether the air conditioner has entered the protection mode and the protection level of the protection mode based on the angle difference.

[0150] The control module 63 is used to control the air conditioner to enter the protection mode according to the judgment result. In the protection mode, the operating status of the air conditioner is adjusted according to the protection level and the current operating mode.

[0151] The control device can execute the above-mentioned safety protection control method. It determines whether to enter the protection mode and the protection level by the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle. It adjusts the operating status of the air conditioner accordingly to avoid damage to the motor and electric auxiliary heating components caused by the blockage of the air supply and return air vents and to prevent fire caused by the overheating of the motor and electric auxiliary heating components. At the same time, it takes into account a certain degree of temperature regulation effect of the air conditioner, thereby improving the safety and temperature regulation effect of the air conditioner.

[0152] This embodiment also provides an air conditioner, including a computer-readable storage medium storing a computer program and a controller. The computer program is read and executed by the controller to implement the above-mentioned safety protection control method. This air conditioner can execute the above-mentioned safety protection control method, determining whether to enter a protection mode and the protection level based on the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle. Accordingly, it adjusts the operating state of the air conditioner to avoid damage to the motor and electric auxiliary heating components caused by blocked air inlets and outlets, and to prevent fires caused by overheating of the motor and electric auxiliary heating components, while also ensuring a certain level of temperature regulation effect, thereby improving the safety and temperature regulation effect of the air conditioner.

[0153] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by computer-controlled devices. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The storage medium can be a memory, a disk, an optical disk, etc.

[0154] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0155] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safety protection control method applied to the safety protection of a floor-standing air conditioner that tilts and falls, characterized in that, The method includes: Obtain the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle of the air conditioner; The angle difference is used to determine whether the air conditioner enters protection mode and the protection level of the protection mode. If so, the air conditioner is controlled to enter the protection mode. In the protection mode, the air conditioner's electrical components are accurately adjusted to different degrees based on the protection level, the types of electrical components involved in the current operating mode, and the different characteristic changes caused by the blockage of the return air vent and the supply air vent. The current operating mode includes cooling mode, heating mode, and electric auxiliary heating mode. In cooling mode, the motor runs, and the blockage status of the supply air vent and the return air vent is represented by the fan speed. In heating mode, the motor runs, and the blockage status of the supply air vent and the return air vent is represented by the supply air temperature. In electric auxiliary heating mode, both the motor and the electric auxiliary heating component run, and the blockage status of the supply air vent and the return air vent is represented by the supply air temperature. Wherein, the protection level of the protection mode is level two, the current operating mode is cooling mode, and the step of accurately and to different degrees adjusting the electrical components of the air conditioner according to the protection level and the current operating mode, as well as the different characteristic changes caused by the blockage of the return air vent and the supply air vent, includes: The motor is set to low speed. Each preset duration is considered a cycle. The return air velocity and supply air velocity for each cycle are obtained. The return air velocity in the first cycle is the first return air velocity, and the supply air velocity is the first supply air velocity. The first supply air velocity and the first return air velocity are the air velocities of the air conditioner when it is not blocked and is operating normally. The return air velocity in each subsequent cycle is the cycle return air velocity, and the supply air velocity is the cycle supply air velocity. If the periodic return air velocity is less than the first return air velocity or the periodic supply air velocity is less than the first supply air velocity, then the motor is controlled to be turned off. And / or, if in M ​​consecutive cycles, the return air velocity of the cycle is not less than the first return air velocity and the supply air velocity of the cycle is not less than the first supply air velocity, then the motor is shut down and an alarm is issued; wherein, M≥50.

2. The method according to claim 1, characterized in that, The step of determining whether the air conditioner has entered protection mode and the protection level of the protection mode based on the angle difference includes: If the angle difference is greater than or equal to the first angle difference threshold and less than or equal to the second angle difference threshold, then the air conditioner is determined to enter the protection mode, and the protection level of the protection mode is level one. If the angle difference is greater than the second angle difference threshold and less than or equal to the third angle difference threshold, then the air conditioner is determined to enter the protection mode, and the protection level of the protection mode is level two. If the angle difference is greater than the third angle difference threshold, then the air conditioner is determined to enter the protection mode, and the protection level of the protection mode is level three. The first angle difference threshold, the second angle difference threshold, and the third angle difference threshold increase sequentially.

3. The method according to claim 2, characterized in that, The protection level of the protection mode is Level 1, and the current operating mode is either cooling mode or heating mode. The step of accurately and to varying degrees adjusting the air conditioner's electrical components based on the protection level, the type of electrical components involved in the current operating mode, and the different characteristic changes caused by the blockage of the return air vent and supply air vent includes: The motor is set to low speed.

4. The method according to claim 2, characterized in that, The protection level of the protection mode is level two, the current operating mode is heating mode, and the step of accurately and to different degrees adjusting the electrical components of the air conditioner according to the protection level, the types of electrical components involved in the current operating mode, and the different characteristic changes caused by the blockage of the return air vent and the supply air vent includes: The motor is set to low speed. Each second preset duration is a cycle. The air supply temperature difference between the latter and the former in each two adjacent cycles is obtained. Among the two adjacent air supply temperature differences, the former is the first front air supply temperature difference and the latter is the first rear air supply temperature difference. If the temperature difference between the first rear air supply and the first front air supply is greater than 0 and the ratio of the temperature difference between the first rear air supply and the first front air supply is greater than 1, then the motor is shut down. And / or, if for X consecutive cycles, the temperature difference of the first rear air supply is greater than 0 and the ratio of the temperature difference of the first rear air supply to the temperature difference of the first front air supply is less than or equal to 1, then the motor is shut down and an alarm is issued; where X≥15; And / or, if the temperature difference of the first after-air supply is less than or equal to 0 for Y consecutive cycles, then the motor is shut down and an alarm is issued; where Y > X.

5. The method according to claim 2, characterized in that, The protection level of the protection mode is Level 1, the current operating mode is electric auxiliary heating mode, and the step of accurately adjusting the electrical components of the air conditioner to different degrees based on the protection level, the types of electrical components involved in the current operating mode, and the different characteristic changes caused by the blockage of the return air vent and the supply air vent includes: The operating speed of the motor and the electric auxiliary heating component are both set to low.

6. The method according to claim 2, characterized in that, The protection level of the protection mode is level two, the current operating mode is electric auxiliary heating mode, and the step of accurately and to different degrees adjusting the electrical components of the air conditioner according to the protection level and the types of electrical components involved in the current operating mode, as well as the different characteristic changes caused by the blockage of the return air vent and the supply air vent, includes: Set the motor to low speed and turn off the electric auxiliary heating component; Every third preset duration is a cycle. The air supply temperature difference between the latter and the former in each two adjacent cycles is obtained. Among the two adjacent air supply temperature differences, the former is the second front air supply temperature difference and the latter is the second rear air supply temperature difference. If the second rear air supply temperature difference is greater than 0 and the ratio of the second rear air supply temperature difference to the second front air supply temperature difference is greater than 1, then control the motor to shut down. And / or, if for E consecutive cycles, the second rear air supply temperature difference is greater than 0 and the ratio of the second rear air supply temperature difference to the second front air supply temperature difference is less than or equal to 1, then the motor is shut down and an alarm is issued; where E≥15; And / or, if the temperature difference of the second after-air supply is less than or equal to 0 for F consecutive cycles, then the motor is shut down and an alarm is issued; where F > E.

7. The method according to claim 2, characterized in that, The protection level of the protection mode is level three, and the current operating mode is cooling mode, heating mode, or electric auxiliary heating mode. The step of accurately and to different degrees adjusting the air conditioner's electrical components based on the protection level, the type of electrical components involved in the current operating mode, and the different characteristic changes caused by the blockage of the return air vent and supply air vent includes: Control the motor to shut down and disconnect the power supply.

8. The method according to any one of claims 3-7, characterized in that, After the air conditioner enters the protection mode, the angle difference of each cycle is obtained every fourth preset time period. If the angle difference for N consecutive cycles is less than the first angle difference threshold, then control the air conditioner to exit the protection mode. Where N≥2.

9. A control device, characterized in that, include: The acquisition module (61) is used to acquire the current operating mode of the air conditioner and the angle difference between the current tilt angle and the initial tilt angle of the air conditioner; The judgment module (62) is used to determine whether the air conditioner has entered the protection mode and the protection level of the protection mode based on the angle difference. The control module (63) is used to control the air conditioner to enter the protection mode according to the judgment result. In the protection mode, the air conditioner's electrical components are adjusted accurately and to different degrees according to the protection level, the types of electrical components involved in the current operating mode, and the different characteristic changes caused by the blockage of the return air vent and the supply air vent.

10. An air conditioner, characterized in that, The method includes a computer-readable storage medium storing a computer program and a controller, wherein the computer program is read and executed by the controller to implement the security protection control method as described in any one of claims 1-8.

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