Air conditioner and control method thereof

Abstract

The invention provides an air conditioner and a control method thereof.The air conditioner comprises an outdoor unit and a shielding mechanism, the outdoor unit comprises a shell and a condenser, the shell is provided with an air inlet, and the condenser is fixedly arranged in the shell and is adjacent to the air inlet; the shielding mechanism comprises a shutter, the shutter is fixedly connected with the shell and covers the outer side of the air inlet, the shutter comprises a plurality of rotatable blades, and the blades are arranged in the height direction of the air inlet; the air inlet amount of the air inlet is adjusted by adjusting the opening and closing angles of the multiple blades. According to the air conditioner, the shielding mechanism is arranged at the air inlet of the outdoor unit, when the air conditioner refrigerates in a low-temperature environment, the opening and closing degree of the air inlet can be controlled by adjusting the opening and closing angles of the blades on the blind window, the air inlet amount is reduced, and the purposes of reducing the heat exchange capacity of a condenser and improving the evaporation temperature of an evaporator are achieved; the problem that low-temperature refrigeration stable and reliable operation is affected due to evaporator frosting caused by too low evaporation temperature is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner and a control method thereof. Background Art

[0002] The communication base station is a service platform for the transmission, exchange and storage of communication signals. It contains heat generation facilities such as power supply and base station signal transmission equipment. The equipment in the base station generates a lot of heat, so the air conditioner that cools the equipment in the base station needs to operate all year round. However, the outdoor ambient temperature is very low in winter, and the condensation effect on the outdoor side is very good. After the refrigerant enters the outdoor heat exchanger and condenses, the temperature quickly approaches the ambient temperature, and the condensation pressure is low, resulting in less refrigerant entering the indoor unit evaporator and a slow flow rate. The evaporation pressure and evaporation temperature of the indoor unit evaporator are also low, and it is easy to frost. Once frosting occurs, it will not only affect the refrigeration effect, but the compressor is also prone to running with liquid, affecting the reliability of the air conditioner.

[0003] In order to achieve normal cooling of the air conditioner in a low temperature environment, the conventional method is to reduce the speed of the outdoor fan to reduce the heat exchange capacity of the condenser, so as to increase the condenser pressure and evaporation pressure and temperature. However, the speed of the outdoor fan cannot be reduced indefinitely. Generally, the motor speed has a lower limit (about 300 rpm). If the speed is lower than the lower limit, there will be a problem of unstable speed control. In an extremely low temperature environment (such as an outdoor ambient temperature below -15°C), the heat exchange effect of the condenser is too good. Simply reducing the fan speed cannot completely solve problems such as evaporator frosting. Summary of the invention

[0004] The embodiments of the present invention provide an air conditioner and a control method thereof, so as to reduce the heat exchange capacity of the condenser and increase the evaporation temperature of the evaporator, and solve the problem that the evaporation temperature is too low, causing the evaporator to frost and affecting the stable and reliable operation of low-temperature refrigeration.

[0005] The present invention provides an air conditioner, comprising:

[0006] An external unit, the external unit comprising a housing and a condenser, the housing being provided with an air inlet, the condenser being fixedly arranged inside the housing and adjacent to the air inlet;

[0007] The shielding mechanism comprises a shutter, the shutter is fixedly connected to the housing and is arranged on the outside of the air inlet, the shutter comprises a plurality of rotatable blades, and the plurality of blades are arranged along the height direction of the air inlet;

[0008] The opening and closing angles of the plurality of blades are adjusted to adjust the air intake volume of the air inlet.

[0009] In the air conditioner provided by the present invention, the shutter also includes a frame fixed on the outer shell, the frame is provided with through openings passing through the two end surfaces thereof, the through openings are arranged opposite to the air inlet, the multiple blades are arranged in parallel on the through opening along the height direction of the through opening, and the blades are rotatably connected to the frame.

[0010] In the air conditioner provided by the present invention, the shielding mechanism further comprises a driving member and a transmission assembly, the driving member is fixed on the frame, and the transmission assembly connects the driving member and the plurality of blades;

[0011] The driving member is activated to drive the transmission assembly to drive the plurality of blades to rotate.

[0012] In the air conditioner provided by the present invention, the transmission assembly includes a belt, a gear and a connecting rod, the gear is arranged on the frame, the belt connects the gear and the driving member, and the connecting rod connects the gear and the plurality of blades;

[0013] The driving member is activated to drive the belt, thereby rotating the gear, and then driving the connecting rod to rotate the plurality of blades.

[0014] In the air conditioner provided by the present invention, one end of the connecting rod is provided with a sawtooth structure, and one end of the connecting rod is meshingly connected with the gear.

[0015] In the air conditioner provided by the present invention, the frame is made of aluminum alloy material; and / or the blades are made of ABS plastic.

[0016] In the air conditioner provided by the present invention, the air conditioner further comprises an indoor unit, the indoor unit comprises an evaporator and a temperature sensor, and the temperature sensor is fixed on the evaporator and is used to detect the temperature of the evaporator.

[0017] The present invention further provides a control method for an air conditioner, which is applied to any of the air conditioners described above, and comprises:

[0018] Obtaining the real-time temperature of the evaporator, and determining the difference between the real-time temperature and the preset temperature;

[0019] If the real-time temperature is lower than the preset temperature, the blades are controlled to close to a specified angle to reduce the air volume of the air inlet.

[0020] The preset temperature of the present invention includes a first preset temperature and a second preset temperature, and the first preset temperature is greater than the second preset temperature. If the real-time temperature is less than the preset temperature, the step of controlling the blade to close to a specified angle further includes:

[0021] If the real-time temperature is greater than the first preset temperature, controlling the blade to open to a first position;

[0022] If the real-time temperature is less than the first preset temperature and greater than the second preset temperature, controlling the blade to close to the second position;

[0023] If the real-time temperature is lower than the second preset temperature, the blade is controlled to close to a third position.

[0024] The control method of the air conditioner of the present invention further includes:

[0025] The air conditioner shutdown information is received, the protection mode is turned on, and the blades are controlled to close to the third position.

[0026] The present application installs the shielding mechanism on the outer side of the air inlet of the external unit, and adjusts the size of the air inlet by adjusting the opening and closing angles of the multiple blades on the shutter, thereby adjusting the air intake volume of the air inlet, so that the user can flexibly control the speed and air intake volume of air flowing into the condenser; when the air conditioner is cooling in a low-temperature environment, the opening and closing degree of the air inlet can be controlled to reduce the air intake volume, thereby achieving the purpose of reducing the heat exchange capacity of the condenser and increasing the evaporation temperature of the evaporator, thereby solving the problem that the evaporation temperature is too low, causing frost on the evaporator and affecting the stable and reliable operation of the low-temperature refrigeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0028] Figure 1 is a side view of an air conditioner in an embodiment of the present invention;

[0029] Figure 2 is a top view of an air conditioner in an embodiment of the present invention;

[0030] Figure 3 is a rear view of the air conditioner in the embodiment of the present invention;

[0031] Figure 4 is a front view of an air conditioner in an embodiment of the present invention;

[0032] Figure 5 A structural diagram of a shielding mechanism in an embodiment of the present invention;

[0033] Figure 6 is an assembly diagram of an evaporator and a temperature sensor in an embodiment of the present invention;

[0034] Figure 7 is a flow chart of a method for controlling an air conditioner in an embodiment of the present invention;

[0035] Figure 8 is a sub-flow chart of a method for controlling an air conditioner in an embodiment of the present invention;

[0036] Fig. 9 A schematic diagram of a step flow of a method for controlling an air conditioner according to an embodiment of the present invention;

[0037] The reference numerals in the figures are:

[0038] 1. External unit; 11. Casing; 12. Condenser; 2. Shielding mechanism; 21. Shutter; 211. Blade; 212. Frame; 22. Driving member; 31. Evaporator; 32. Temperature sensor. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present invention is described in detail.

[0040] Reference Figures 1 to 6 As shown, it shows an embodiment of the air conditioner of the present invention. The air conditioner comprises an external unit 1 and a shielding mechanism 2, wherein the external unit 1 comprises a housing 11 and a condenser 12, wherein the housing 11 is provided with an air inlet, and the condenser 12 is fixedly arranged inside the housing 11 and arranged adjacent to the air inlet; the shielding mechanism 2 comprises a louver 21, wherein the louver 21 is fixedly connected to the housing 11 and covers the outside of the air inlet, and the louver 21 comprises a plurality of rotatable blades 211, wherein the plurality of blades 211 are arranged along the height direction of the air inlet; wherein the opening and closing angles of the plurality of blades 211 are adjusted to adjust the air volume of the air inlet.

[0041] Specifically, as one of the important electrical appliances for regulating temperature, the air conditioner is used in an increasingly wide range of fields and in an increasing number of types. In the communication field, since a communication base station is equipped with a variety of heating facilities such as a power supply and a signal transmission device, in order to ensure the normal operation of the communication base station, it is necessary to equip the base station with an air conditioner for year-round cooling operation to reduce the internal temperature of the base station. However, in winter, due to the low outdoor ambient temperature, the evaporation pressure and evaporation temperature of the condenser 12 of the air conditioner are easily low, and the condenser 12 is prone to frost, which affects the use of the air conditioner.

[0042] Therefore, this embodiment provides an air conditioner, especially for a computer room air conditioner, the air conditioner includes an outdoor unit 1 and a shielding mechanism 2, the outdoor unit 1 is used to compress the refrigerant into a high-temperature and high-pressure gas through a compressor, and then use a condenser 12 to release the heat of the gas into the outdoor air, so that it is cooled and converted into a low-temperature and high-pressure liquid; the outdoor unit 1 includes an outer shell 11 and a condenser 12, the outer shell 11 is used to protect the internal structural parts from the external environment, and an air inlet is provided on one side of the outer shell 11, and the air inlet passes through the outer side and the internal space of the outer shell 11 to ensure air circulation, thereby assisting the condenser 12 to effectively dissipate heat; the condenser 12 is a heat exchanger for cooling the gas, the condenser 12 is fixed inside the outer shell 11, and is arranged close to the air inlet, so as to maximize the use of the air flow inhaled through the air inlet for heat exchange, thereby maintaining stable operation of the system.

[0043] The air conditioner also includes a shielding mechanism 2, which is used to adjust the size of the air inlet, thereby adjusting the air intake of the air inlet; the shielding mechanism 2 includes a shutter 21, which is fixed to the outside of the shell 11 and covered on the periphery of the air inlet, thereby opening or closing the air inlet; the shutter 21 includes a plurality of rotatable blades 211, and the plurality of blades 211 are arranged in sequence along the height direction of the air inlet, thereby forming a dynamic barrier on the outside of the air inlet.

[0044] When the air conditioner is started, the size of the air inlet can be adjusted by adjusting the opening and closing angles of the plurality of blades 211, thereby adjusting the air intake of the air inlet. When the outdoor temperature is low, the blades 211 are closed or the opening is reduced, thereby reducing the amount of cold air entering the condenser 12, reducing the heat exchange efficiency of the condenser 12, and then increasing the condensation pressure and evaporation pressure, effectively preventing the evaporator 31 from frosting. At the same time, this adjustment method can also ensure that the cooling effect of the air conditioner in a low temperature environment is not affected, and maintain the temperature in the base station stable.

[0045] In addition, the design of the shutter 21 also takes into account the adaptability of wind direction and wind speed. The blades 211 can not only be adjusted to open and close according to demand, but their rotation characteristics can also guide the airflow direction to a certain extent, ensuring that the air hits the surface of the condenser 12 at the best angle and speed, thereby improving the heat exchange efficiency.

[0046] The present application installs the shielding mechanism 2 on the outer side of the air inlet of the external unit 1, and adjusts the size of the air inlet by adjusting the opening and closing angles of the multiple blades 211 on the shutter 21, thereby adjusting the air intake volume of the air inlet, so that the user can flexibly control the speed and air intake volume of air flowing into the condenser 12; when the air conditioner is cooling in a low-temperature environment, the opening and closing degree of the air inlet can be controlled to reduce the air intake volume, thereby achieving the purpose of reducing the heat exchange capacity of the condenser 12 and increasing the evaporation temperature of the evaporator 31, thereby solving the problem that the evaporation temperature is too low, causing frost on the evaporator 31, and affecting the stable and reliable operation of low-temperature refrigeration.

[0047] At the same time, in areas with frequent sandstorms, when impurities such as dust pose a serious threat to the normal operation of the outdoor unit 1 of the air conditioner, the shutters 21 can be controlled to be completely closed to form a solid protective barrier, which effectively prevents impurities such as dust from entering the air conditioner and causing damage or pollution in a sandstorm environment, and also protects the cleanliness and normal operation of the outdoor unit 1 of the air conditioner. By enhancing the anti-sand and dust capabilities, the implementation of the present invention provides a strong guarantee for the safe operation of communication base station equipment.

[0048] In one embodiment, referring to Figure 5 As shown, the shutter 21 also includes a frame 212 fixed on the shell 11, and the frame 212 is provided with through openings passing through its two end surfaces, and the through openings are arranged opposite to the air inlet, and the multiple blades 211 are arranged in parallel on the through opening along the height direction of the through opening, and the blades 211 are rotatably connected to the frame 212. Specifically, the shutter 21 includes a frame 212, which serves as the skeleton of the shutter 21 and is fixed on the outside of the shell 11. The frame 212 is used to support and fix other structural members; the frame 212 is provided with a through opening, which passes through both ends of the frame 212, and the through opening is arranged opposite to the air inlet, so that the airflow enters the air inlet from the through opening and then enters the interior of the shell 11; the blades 211 are rotatably connected to the frame 212, and a plurality of the blades 211 are arranged in the through opening at intervals along the height direction of the through opening, so as to open or close the through opening; the through opening not only provides space for the arrangement of the blades 211, but also ensures that the air can pass smoothly to achieve the adjustment of the air intake volume; the shape and size of the through opening need to match the arrangement of the plurality of blades 211 to ensure that the blades 211 will not be obstructed during the rotation process, while maximizing the use of air flow. The plurality of blades 211 are arranged in parallel on the opening along the height direction of the opening, forming a dynamic barrier; the blades 211 are connected to the frame 212 by a specific rotation connection method, which can maintain a stable rotation state and quickly adjust the angle when needed. In this embodiment, the structure of the shutter 21 is highly stable, and the rotation of the blades 211 is more stable.

[0049] In a specific embodiment, refer to Figure 5 As shown, the shielding mechanism 2 also includes a driving member 22 and a transmission assembly. The driving member 22 is fixed on the frame 212, and the transmission assembly connects the driving member 22 and the plurality of blades 211; wherein, the driving member 22 is started to drive the transmission assembly to drive the plurality of blades 211 to rotate. Specifically, in order to realize the automation of the air conditioner, the rotation of the blades 211 can be automatically controlled. The shielding mechanism 2 also includes a driving member 22 and a transmission assembly. The driving member 22 is fixed on the frame 212 as the core power source of the automatic adjustment system of the blinds 21; the transmission assembly is a key component connecting the driving member 22 and the plurality of blades 211, and undertakes the important task of converting the driving force into the rotation of the blades 211.

[0050] In the automatic adjustment system of the shutter 21, the cooperation between the driving member 22 and the transmission assembly is very important. When the driving member 22 is started, the driving member 22 transmits power to the plurality of blades 211 through the transmission assembly to drive the plurality of blades 211 to rotate.

[0051] In this embodiment, the driving member 22 and the transmission assembly are used to rotate the plurality of blades 211, so that the blades 211 of the shutter 21 can automatically and accurately adjust the opening and closing angles, thereby ensuring the accuracy and stability of the rotation of the blades 211, thereby realizing intelligent control of the air intake volume; at the same time, the overall performance of the outdoor unit 1 is improved, and a more convenient and comfortable use experience is brought to the user.

[0052] More specifically, the driving member 22 is a stepper motor, which is an open-loop control element that converts an electrical pulse signal into an angular displacement or a linear displacement, and has the advantages of precise control, high reliability, easy control, and low power consumption. Through the precise position control and speed control functions of the stepper motor, the precise adjustment of the opening and closing angles and speeds of the plurality of blades 211 of the shutter 21 can be achieved.

[0053] In one embodiment, the transmission assembly includes a belt, a gear and a connecting rod (not shown in the figure), the gear is arranged on the frame 212, the belt connects the gear and the driving member 22, and the connecting rod connects the gear and the plurality of blades 211; wherein, the driving member 22 is started to drive the belt, thereby rotating the gear, and then driving the connecting rod to rotate the plurality of blades 211. Specifically, the transmission assembly, as the core component of the shielding mechanism 2, ensures that the power of the driving member 22 can be efficiently and accurately transmitted to the plurality of blades 211 of the shutter 21, so as to realize automatic and precise adjustment of the plurality of blades 211.

[0054] The transmission assembly includes a belt, a gear and a connecting rod. The belt, the gear and the connecting rod complete the power transmission process from the driving member 22 to the plurality of blades 211 through precise matching and cooperation. The gear is arranged on the frame 212, and the belt connects the gear and the driving member 22, that is, one end of the belt is connected to the driving member 22, and the other end is connected to the gear. When the driving member 22 is started, the belt will rotate accordingly, thereby driving the gear to rotate, and then transmitting the power of the driving member 22 to the gear. The gear is the core transmission element in the transmission assembly. The gear is arranged on the frame 212 and closely matches the belt. When the belt rotates, the gear will rotate accordingly.

[0055] The connecting rod connects the gear and the plurality of blades 211. The connecting rod serves as a bridge connecting the gear and the blades 211. When the gear rotates, the connecting rod swings accordingly, thereby driving the plurality of blades 211 to rotate. The length and shape of the connecting rod can be customized according to the arrangement and rotation requirements of the plurality of blades 211 to ensure that the plurality of blades 211 can rotate according to a predetermined trajectory and angle.

[0056] When the driving member 22 receives the control signal, the driving member 22 starts to rotate and transmits power to the gear through the belt; the gear rotates accordingly and converts the power into the rotation of the plurality of blades 211 through the connecting rod.

[0057] The transmission assembly has a simple structure. Through the cooperation of the belt, the gear and the connecting rod, the transmission assembly realizes efficient and accurate power transmission from the driving member 22 to the plurality of blades 211, while improving the automation level and adjustment accuracy of the shielding mechanism 2.

[0058] In a specific embodiment, a sawtooth structure (not shown in the figure) is provided at one end of the connecting rod, and one end of the connecting rod is meshed with the gear. Specifically, in order to ensure that the connecting rod not only connects the gear and the blade 211, but also converts the rotational motion of the gear into the opening and closing motion of the blade 211, a sawtooth structure is provided at one end of the connecting rod, and the sawtooth structure enables the connecting rod to achieve precise meshing connection with the gear teeth of the gear. When the gear rotates under the drive of the belt, the gear teeth of the gear will contact the sawtooth structure at one end of the connecting rod, and transmit the rotational motion to the connecting rod through meshing.

[0059] The meshing connection between the connecting rod and the gear in this embodiment ensures the accuracy and stability of the power transmission of the transmission assembly; and due to the close fit between the sawtooth structure and the gear teeth, the connecting rod can accurately follow the rotation trajectory of the gear to swing, thereby driving the blades 211 to open and close at a predetermined angle; secondly, the transmission efficiency is also improved. At the same time, the friction coefficient between the sawtooth structure and the gear teeth is small, which can reduce energy loss and make power transmission more efficient.

[0060] In one embodiment, the frame 212 is made of aluminum alloy material; and / or the blades 211 are made of ABS plastic. Specifically, aluminum alloy is a lightweight, high-strength metal material with excellent corrosion resistance and oxidation resistance. In the design of the frame 212 of the shutter 21, the frame 212 is made of aluminum alloy material, so that the frame 212 has the advantages of light weight, high strength, corrosion resistance, easy processing, and aesthetics. The frame 212 forms a stable support structure through precision processing and welding processes for installing and fixing other components.

[0061] The full name of ABS plastic is acrylonitrile-butadiene-styrene copolymer, which is a thermoplastic engineering plastic produced by copolymerization of acrylonitrile (Acrylonitrile), butadiene (Butadiene) and styrene (Styrene).

[0062] ABS plastic is usually a light yellow or milky white granular non-crystalline resin, which is non-toxic, odorless, impermeable to water but slightly permeable to water vapor, and is a thermoplastic plastic with excellent mechanical properties, impact resistance, and processing properties. In the design of the blades 211 of the blinds 21, the material of the blades 211 is ABS plastic, so that the blades 211 have the advantages of impact resistance, easy molding, weather resistance, and low cost-effectiveness. Therefore, the blades 211 are made of lightweight and durable ABS plastic to improve wear resistance and anti-aging properties, to ensure stability and durability in long-term use, thereby improving the service life of the shielding mechanism 2.

[0063] In a specific embodiment, refer to Figure 6As shown, the air conditioner also includes an indoor unit, which includes an evaporator 31 and a temperature sensor 32. The temperature sensor 32 is fixed on the evaporator 31 and is used to detect the temperature of the evaporator 31. Specifically, the air conditioner also includes an indoor unit, which is a key device for indoor environment regulation, and its main responsibility is to be responsible for the circulation and temperature regulation of indoor air. The indoor unit includes an evaporator 31 and a temperature sensor 32. The evaporator 31 is one of the core components in the air conditioning refrigeration system. It is located inside the shell of the indoor unit and mainly uses the characteristics of liquid refrigerant evaporating and absorbing heat under low pressure to reduce the indoor temperature. The indoor unit inhales indoor air, processes it through the evaporator 31, and then blows out the regulated air, thereby achieving precise control of the indoor temperature. The temperature sensor 32 is another important component in the air conditioner's indoor unit. It is fixed on the evaporator 31 and is used to detect the temperature of the evaporator 31 in real time and transmit the detected temperature information to the control system of the air conditioner. The control system adjusts the opening and closing angles of the shutters 21 based on this information to control the opening and closing degree of the air inlet and reduce the air intake, thereby achieving the purpose of reducing the heat exchange capacity of the condenser 12 and increasing the evaporation temperature of the evaporator 31, thereby solving the problem of frosting of the evaporator 31 due to the evaporation temperature being too low, affecting the stable and reliable operation of low-temperature refrigeration.

[0064] More specifically, the evaporator 31 is provided with an air inlet, and the temperature sensor 32 is fixed in the air inlet, thereby improving the detection accuracy of the temperature sensor 32 .

[0065] Exemplarily, a temperature sensor 32 is provided at the inlet of the evaporator 31. When the temperature at the inlet of the evaporator 31 reaches or is lower than the preset frost warning threshold (1°C - this value is a recommended value), the intelligent control system will automatically reduce the opening and closing angle of the blade 211 to reduce the amount of air entering the condenser 12 and reduce the heat exchange efficiency; as the temperature at the inlet of the evaporator 31 further decreases, the opening and closing angle will gradually decrease until it is completely closed. Conversely, when the temperature at the inlet of the evaporator 31 rises back to the preset anti-frost warning release threshold, the opening and closing angle will gradually increase until it returns to normal working state. When the air conditioner is turned off, the air conditioner enters the protection mode - after the blades 211 of the shutter 21 are adjusted to the closed state, the air conditioner enters the standby state.

[0066] The embodiment of the present invention also provides a method for controlling an air conditioner. Fig. 9 is a schematic flow chart of the steps of the air conditioner control method, Figure 7 is a flow chart of the control method of the air conditioner, wherein the steps of the control method of the air conditioner include S110-S120:

[0067] S110, obtaining the real-time temperature of the evaporator 31, and determining the difference between the real-time temperature and the preset temperature;

[0068] Specifically, the real-time temperature refers to the temperature obtained by real-time detection by a temperature sensor 32 fixed on the evaporator 31. After the temperature sensor 32 detects the real-time temperature of the evaporator 31, the real-time temperature is fed back to the control system of the air conditioner; after receiving the real-time temperature, the control system determines the difference between the real-time temperature and the preset temperature. The preset temperature is an empirical data set in advance inside the control system. Since the present embodiment mainly solves the problem of frosting of the evaporator 31, the preset temperature is related to the frosting temperature of the evaporator 31; the real-time temperature is compared with the preset temperature to determine whether it is necessary to adjust the opening and closing degree of the shutter 21, thereby increasing or decreasing the air intake of the air inlet of the air conditioner outdoor unit 1 to ensure the operating efficiency of the air conditioner or avoid frosting of the evaporator 31.

[0069] S120, if the real-time temperature is lower than the preset temperature, controlling the blade 211 to close to a specified angle to reduce the air volume of the air inlet;

[0070] Specifically, when the real-time temperature of the evaporator 31 is lower than the preset temperature, it indicates that the evaporator 31 is at risk of frosting. In order to avoid frosting of the evaporator 31 and ensure the normal operation of the air conditioner, the air conditioner should turn on the low-temperature anti-frost mode at this time, and the control system controls the blades 211 to close to a specified angle to make the air inlet smaller, thereby reducing the air intake of the air inlet and the amount of cold air entering the condenser 12, so as to reduce the heat exchange efficiency of the condenser 12, thereby increasing the condensing pressure and evaporation pressure of the air conditioner, and effectively preventing the evaporator 31 from frosting; at the same time, this adjustment method can also ensure that the cooling effect of the air conditioner in a low-temperature environment is not affected, thereby maintaining the temperature stability in the base station.

[0071] More specifically, when the real-time temperature of the evaporator 31 is higher than the preset temperature, it indicates that there is no risk of frost on the evaporator 31. In order to improve the operating efficiency of the air conditioner and reduce energy consumption, the control system needs to open the shutters 21 to the maximum, that is, the blades 211 are fully open and the blades 211 are parallel to the ground. The air intake of the air inlet is the largest, the condensing pressure of the condenser 12 is small, and the evaporating pressure of the evaporator 31 is small, thereby reducing the energy consumption of the air conditioner and improving the operating efficiency.

[0072] In one embodiment, if Figure 8 As shown, the preset temperature includes a first preset temperature and a second preset temperature, and the first preset temperature is greater than the second preset temperature, and step S120 also includes S121-S123.

[0073] S121, if the real-time temperature is greater than the first preset temperature, controlling the blade 211 to open to a first position;

[0074] S122, if the real-time temperature is less than the first preset temperature and greater than the second preset temperature, controlling the blade 211 to close to a second position;

[0075] S123, if the real-time temperature is lower than the second preset temperature, controlling the blade 211 to close to a third position;

[0076] Specifically, in order to improve the control accuracy of the air conditioner on the shutter 21, the opening and closing angle of the shutter 21 is further subdivided. The opening and closing angle of the shutter 21 is related to the temperature of the evaporator 31. The lower the temperature of the evaporator 31, the higher the risk of frost on the evaporator 31. Therefore, the smaller the opening and closing angle of the shutter 21 that needs to be controlled, the less air intake into the air inlet can increase the condensation pressure and the evaporation pressure.

[0077] The preset temperature includes a first preset temperature and a second preset temperature, the first preset temperature and the second preset temperature are both empirical temperature values ​​pre-set in the control system, and the first preset temperature is greater than the second preset temperature. In this embodiment, the first preset temperature is a frost warning threshold, which is generally 1°C; the second preset temperature is a temperature threshold at which frost is prone to occur, which is generally 0°C.

[0078] The first position, the second position and the third position are designated positions, and the opening and closing angles of the blade 211 can be calculated by the real-time temperature and preset rules, and then the blade 211 can be controlled to rotate to the designated position according to the opening and closing angles; or a plurality of preset opening and closing angles can be pre-stored in the control system in a preset manner, and then the blade 211 can be controlled to rotate to the designated position according to the preset opening and closing angles. In this embodiment, the first position refers to a position parallel to the ground, that is, at this time the opening and closing angle of the blade 211 is 90°, the shutter 21 is in a fully open state, and the air intake is maximum at this time; the third position refers to a position perpendicular to the ground, that is, at this time the opening and closing angle of the blade 211 is 180°, the shutter 21 is in a fully closed state, and the air intake is minimum at this time; the second position refers to a position inclined to the ground, at this time the blade 211 is between the first position and the third position, and the shutter 21 is in a half-open state, that is, the blade 211 rotates between the first position and the third position, and the lower the real-time temperature of the evaporator 31, the blade 211 rotates from the first position to the third position, and rotates a certain angle according to the opening and closing angle, and finally is located at the designated position; the higher the real-time temperature of the evaporator 31, the blade 211 rotates from the third position to the first position, and rotates a certain angle according to the opening and closing angle, and finally is located at the designated position.

[0079] When the real-time temperature is greater than the first preset temperature (1°C), it indicates that the evaporator 31 will not frost, so the blade 211 is controlled to open to the first position (fully open or nearly fully open) to maximize the air intake, enhance the cooling effect, improve operating efficiency, and reduce energy consumption.

[0080] When the real-time temperature is greater than the second preset temperature (0°C) and less than or equal to the first preset temperature (1°C), it indicates that the evaporator 31 is at risk of frosting. Therefore, the blade 211 is controlled to close to the second position (partially open) to reduce the air intake, thereby avoiding frosting of the evaporator 31 and maintaining a certain cooling capacity to adapt to environmental requirements.

[0081] When the real-time temperature is less than or equal to the second preset temperature, it indicates that the risk of frost on the evaporator 31 is high, so the blade 211 is controlled to close to the third position (close to fully closed or fully closed), further reducing the air intake to prevent the evaporator 31 from frosting and affecting the operation of the air conditioner.

[0082] In this embodiment, in the control method of the air conditioner, the first preset temperature and the second preset temperature are introduced as judgment basis, so that the operating state of the air conditioner can be adjusted more finely to adapt to different environmental conditions, ensure the normal operation of the air conditioner, and reduce energy consumption.

[0083] More specifically, in order to improve control accuracy and response speed, the present invention also adopts a dynamic adaptation mechanism and a fuzzy control algorithm. The dynamic adaptation mechanism can monitor the changing trend of environmental parameters in real time and predict the future temperature trend, so as to adjust the opening and closing angle of the opening and closing device in advance to cope with the potential risk of frost. The fuzzy control algorithm can handle the fuzziness and uncertainty factors in the environmental parameters, making the control process more flexible.

[0084] For example, the opening and closing angle of the blade 211 is adjusted according to the real-time temperature of the evaporator 31. When the real-time temperature is greater than 1°C, the shutter 21 is opened to the maximum, that is, the blade 211 is parallel to the ground; when the evaporator 31 is prone to frost at 0°C, the shutter 21 is completely closed, that is, the blade 211 is vertical to the ground; when the real-time temperature is greater than 0°C and less than 1°C, it can be adjusted according to different temperatures, for example, starting from 1°C, the blade 211 is closed 18° for every 0.2°C drop. (Wherein, the blade 211 is 90° when opened and 180° when closed)

[0085] In one embodiment, the air conditioner control method further includes step S130.

[0086] S130, receiving shutdown information of the air conditioner, turning on the protection mode, and controlling the blade 211 to close to the third position.

[0087] Specifically, when the air conditioner is not in use, in order to protect the air conditioner outdoor unit 1, the air conditioner also has a protection mode. That is, when the control system receives the shutdown information of the air conditioner (including the standby state and the shutdown state), the protection mode is turned on, and the blades 211 are controlled to be closed to the third position. At this time, the shutters 21 are in a fully closed state, thereby forming a protective barrier at the air inlet to prevent external factors such as wind, sand, and debris from invading the interior of the outdoor unit 1, thereby increasing the service life of the air conditioner and reducing maintenance costs.

[0088] The present invention fully considers the protection requirements of the air conditioner outdoor unit 1 in harsh environments, especially in areas with frequent sandstorms, where impurities such as sand and dust pose a serious threat to the normal operation of the air conditioner outdoor unit 1. The shutter 21 designed in the present invention can be completely closed to form a solid protective barrier, which effectively prevents impurities such as sand and dust from entering the air conditioner to cause damage or pollution in a sandstorm environment, and also protects the cleanliness and normal operation of the air conditioner outdoor unit 1. By enhancing the anti-sand and dust capabilities, the implementation of the present invention provides a strong guarantee for the safe operation of communication base station equipment.

[0089] Exemplarily, the air conditioner has different working modes in different environments, including:

[0090] 1. Normal working mode: When the real-time temperature of the evaporator 31 is within the preset normal working range (i.e., the real-time temperature>1°C), the shielding structure keeps the blade 211 at the maximum opening to ensure sufficient air flow into the air-conditioning outdoor unit 1 to maintain normal cooling efficiency; at this time, the control unit is in standby mode and only performs temperature monitoring without performing opening and closing actions unless the ambient temperature changes significantly.

[0091] 2. Low-temperature anti-frost mode: When the real-time temperature of the evaporator 31 reaches or is lower than the preset frost warning threshold (i.e., the real-time temperature ≤ 1°C), the opening and closing device enters the low-temperature anti-frost mode. At this time, the control system will control the opening and closing angle of the blade 211 to gradually decrease until it is closed, so as to reduce the amount of cold air entering the air conditioner outdoor unit 1, thereby reducing the surface temperature of the evaporator 31 to prevent frost from occurring; as the ambient temperature further decreases or increases and the real-time monitoring feedback of the frost on the surface of the evaporator 31 is obtained, the control system will dynamically adjust the opening and closing degree of the blade 211 to maintain the best anti-frost effect.

[0092] 3. Protection mode: When the air conditioner is turned off (including standby mode and shutdown mode), the shielding mechanism 2 will automatically close the blades 211 to form a protective barrier to prevent external factors such as wind, sand, and debris from invading the interior of the air conditioner and protect the equipment from damage; this function not only extends the service life of the equipment, but also reduces maintenance costs.

[0093] The control method of the air conditioner of the present application optimizes the refrigeration process of the air conditioner by accurately controlling the opening and closing degree of the shutter 21 through control system analysis. This intelligent control method enables the air-conditioning system to respond quickly and adjust the working state when facing a low-temperature environment, thereby maintaining stable operating performance; in addition, by reducing potential risks such as compressor liquid operation caused by frosting, the implementation of the present invention further improves the reliability and service life of the air-conditioning system; and adds a protection mode to enhance the air conditioner's anti-sand and dust resistance and protect the safety of the equipment.

[0094] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An air conditioner, characterized in that: include: An external unit, the external unit comprising a housing and a condenser, the housing being provided with an air inlet, the condenser being fixedly arranged inside the housing and adjacent to the air inlet; The shielding mechanism comprises a shutter, the shutter is fixedly connected to the housing and is arranged on the outside of the air inlet, the shutter comprises a plurality of rotatable blades, and the plurality of blades are arranged along the height direction of the air inlet; The opening and closing angles of the plurality of blades are adjusted to adjust the air intake volume of the air inlet.

2. The air conditioner according to claim 1, characterized in that: The shutter also includes a frame fixed on the shell, the frame is provided with openings passing through its two end surfaces, the openings are arranged opposite to the air inlet, the multiple blades are arranged in parallel on the opening along the height direction of the opening, and the blades are rotatably connected to the frame.

3. The air conditioner according to claim 2, characterized in that: The shielding mechanism further includes a driving member and a transmission assembly, wherein the driving member is fixed on the frame, and the transmission assembly connects the driving member and the plurality of blades; The driving member is activated to drive the transmission assembly to drive the plurality of blades to rotate.

4. The air conditioner according to claim 3, characterized in that: The transmission assembly includes a belt, a gear and a connecting rod, the gear is arranged on the frame, the belt connects the gear and the driving member, and the connecting rod connects the gear and the plurality of blades; The driving member is activated to drive the belt, thereby rotating the gear, and then driving the connecting rod to rotate the plurality of blades.

5. The air conditioner according to claim 4, characterized in that: One end of the connecting rod is provided with a sawtooth structure, and one end of the connecting rod is meshedly connected with the gear.

6. The air conditioner according to claim 2, characterized in that: The frame is made of aluminum alloy material; and / or the blades are made of ABS plastic.

7. The air conditioner according to any one of claims 1 to 6, characterized in that: The air conditioner further comprises an indoor unit, wherein the indoor unit comprises an evaporator and a temperature sensor, wherein the temperature sensor is fixedly mounted on the evaporator and is used for detecting the temperature of the evaporator.

8. A method for controlling an air conditioner, characterized in that: Applied to the air conditioner according to any one of claims 1 to 7, the method comprises: Obtaining the real-time temperature of the evaporator, and determining the difference between the real-time temperature and the preset temperature; If the real-time temperature is lower than the preset temperature, the blades are controlled to close to a specified angle to reduce the air volume of the air inlet.

9. The method according to claim 8, characterized in that The preset temperature includes a first preset temperature and a second preset temperature, and the first preset temperature is greater than the second preset temperature. If the real-time temperature is less than the preset temperature, the step of controlling the blade to close to a specified angle further includes: If the real-time temperature is greater than the first preset temperature, controlling the blade to open to a first position; If the real-time temperature is less than the first preset temperature and greater than the second preset temperature, controlling the blade to close to the second position; If the real-time temperature is lower than the second preset temperature, the blade is controlled to close to a third position.

10. The method according to claim 8, characterized in that The method further comprises: The air conditioner shutdown information is received, the protection mode is turned on, and the blades are controlled to close to the third position.

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