An air conditioning system and its control method

Abstract

This application provides an air conditioning system and its control method, relating to the field of air conditioning technology, for ensuring the heating effect of the air conditioning system and improving the operational stability of the air conditioning system. The air conditioning system includes: an outdoor unit, comprising a compressor, an outdoor heat exchanger, a four-way valve, an outdoor fan, and a motor; an indoor unit, comprising an indoor heat exchanger; a heating device; a first temperature sensor; a second temperature sensor; and a controller configured to: when the air conditioning system is in heating mode, acquire the operating power of the motor, a first temperature value of the liquid pipe, and a first temperature value of the outdoor environment; and, under any one of a first preset condition, a second preset condition, or a third preset condition, control the heating device to start and operate at the first preset power.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an air conditioning system and its control method. Background Technology

[0002] With the improvement of living standards, air conditioning systems have been widely used in people's daily lives, becoming an essential household appliance for users to cool off in summer and keep warm in winter.

[0003] Currently, the heat exchanger chassis of air conditioning systems is equipped with a subcooling section, which can increase the subcooling degree of the air conditioning system in cooling mode and prevent the outdoor unit chassis from icing. However, by adding a subcooling section to the heat exchanger chassis, the air conditioning system experiences greater pressure loss during heating mode operation, which reduces the heating performance of the air conditioning system and decreases the operational stability of the air conditioning system. Summary of the Invention

[0004] This application provides an air conditioning system and its control method to ensure the heating effect of the air conditioning system and improve the operational stability of the air conditioning system.

[0005] In a first aspect, an air conditioning system is provided, comprising: an outdoor unit, including a compressor, an outdoor heat exchanger, a four-way valve, an outdoor fan, and a motor, wherein the motor is used to drive the outdoor fan;

[0006] Indoor unit, including indoor heat exchanger;

[0007] One end of the outdoor heat exchanger is connected to the indoor heat exchanger via a liquid pipe, and the other end is connected to the compressor via a gas pipe.

[0008] The air conditioning system also includes a heating device, located at the bottom of the outdoor unit, for heating the chassis of the outdoor unit;

[0009] The first temperature sensor is installed on the outdoor heat exchanger and is used to detect the temperature value of the liquid pipe;

[0010] The second temperature sensor is installed on the outdoor unit and is used to detect the temperature value of the outdoor environment;

[0011] The controller is configured as follows:

[0012] When the air conditioning system is in heating mode, the operating power of the motor, the first temperature value of the liquid pipe, and the first temperature value of the outdoor environment are obtained.

[0013] If any one of the first preset condition, the second preset condition, or the third preset condition is met, the heating device is controlled to start and operate at the first preset power; the first preset condition includes: the operating power ratio of the motor is within a preset range, and the first temperature value of the liquid pipe is above the first temperature threshold, the operating power ratio of the motor is determined based on the initial operating power and the current operating power of the motor;

[0014] The second preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is above the second temperature threshold, and the first temperature value of the liquid pipe is below the first temperature threshold and remains below the first preset duration.

[0015] The third preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is below the second temperature threshold, and the first temperature value of the liquid pipe is below the third temperature threshold and remains below the first preset duration.

[0016] The technical solution provided in this application provides at least the following beneficial effects: This application provides an air conditioning system with a heating device installed at the bottom of the outdoor unit. When any one of the first, second, or third preset conditions is met, it indicates that the outdoor unit is in a frosted state. It is understood that after the outdoor unit is frosted, the heating effect of the air conditioning system is poor. If the condensate on the chassis of the outdoor unit is not drained in time, it will freeze on the chassis. Once the frost layer is full, the motor's efficiency decreases, leading to a decrease in fan speed. Therefore, controlling the heating device to start and operate increases the temperature of the outdoor unit's chassis, prevents the condensate from freezing, and defrosts the chassis, preventing a decrease in fan speed. This improves the stability of the air conditioning system and helps enhance the user experience.

[0017] In some embodiments, the outdoor heat exchanger is a U-shaped outdoor heat exchanger.

[0018] Understandably, U-shaped heat exchangers have a larger heat exchange area. In this embodiment, by setting the outdoor heat exchanger as a U-shaped heat exchanger, the heat exchange area is increased, thereby improving the heating effect.

[0019] In some embodiments, the controller is further configured to: control the air conditioning system to switch from heating mode to defrost mode, control the heating device to start and operate at a second preset power when any one of a fourth preset condition, a fifth preset condition, or a sixth preset condition is met; the second preset power is above a first preset power; the fourth preset condition includes a motor operating power ratio above the upper limit of a preset range; the fifth preset condition includes a first outdoor ambient temperature value above a second temperature threshold, and a first liquid pipe temperature value below the first temperature threshold and maintained for a first preset duration; the sixth preset condition includes a first outdoor ambient temperature value below the second temperature threshold, and a first liquid pipe temperature value below a third temperature threshold and maintained for a first preset duration.

[0020] In some embodiments, the air conditioning system further includes: a pressure sensor disposed at the compressor's exhaust port for detecting the compressor's exhaust pressure value; and a controller further configured to: acquire a second temperature value of the liquid pipe and the compressor's exhaust pressure value after controlling the air conditioning system to switch from heating mode to defrost mode; and control the air conditioning system to switch from defrost mode to heating mode when a seventh preset condition is met, the seventh preset condition including: the second temperature value of the liquid pipe is above a fourth temperature threshold, or the compressor's exhaust pressure value is above a preset pressure threshold.

[0021] In some embodiments, the air conditioning system further includes: a plurality of third temperature sensors, the plurality of third temperature sensors being spaced apart on the chassis of the outdoor unit, each third temperature sensor being used to detect the chassis temperature value of the outdoor unit; the controller is further configured to: after controlling the air conditioning system to switch from defrost mode to heating mode, acquire the chassis temperature value of the outdoor unit through the plurality of third temperature sensors; when the chassis temperature value of the outdoor unit is detected to be above a fifth temperature threshold, control the heating device to turn off; or, when the chassis temperature value of the outdoor unit is detected to be between the fifth temperature threshold and a sixth temperature threshold, control the heating device to operate at a first preset power for a second preset time and then turn off, wherein the sixth temperature threshold is below the fifth temperature threshold; or, when the chassis temperature value of the outdoor unit is detected to be below the sixth temperature threshold, control the heating device to operate at a second preset power for a third preset time and then turn off.

[0022] In some embodiments, the controller is configured to control the air conditioning system to switch from defrost mode to heating mode, specifically configured to control the four-way valve to switch from a closed state to an open state, so that the air conditioning system switches from defrost mode to heating mode.

[0023] Secondly, a control method for an air conditioning system is provided. The method includes: when the air conditioning system is in heating mode, acquiring the operating power of a motor, a first temperature value of a liquid pipe, and a first temperature value of the outdoor environment; and, under any one of a first preset condition, a second preset condition, or a third preset condition, controlling a heating device to start and operate at a first preset power; the first preset condition includes: the ratio of the motor's operating power is within a preset range, and the first temperature value of the liquid pipe is above a first temperature threshold, wherein the ratio of the motor's operating power is determined based on the initial operating power and the current operating power of the motor; the second preset condition includes: the ratio of the motor's operating power is within a preset range, the first temperature value of the outdoor environment is above a second temperature threshold, and the first temperature value of the liquid pipe is below the first temperature threshold and remains below a first preset duration; the third preset condition includes: the ratio of the motor's operating power is within a preset range, the first temperature value of the outdoor environment is below a second temperature threshold, and the first temperature value of the liquid pipe is below a third temperature threshold and remains below a first preset duration.

[0024] In some embodiments, the method further includes: when any one of a fourth preset condition, a fifth preset condition, or a sixth preset condition is met, controlling the air conditioning system to switch from a heating mode to a defrosting mode, controlling the heating device to start and operate at a second preset power, wherein the second preset power is above the first preset power; the fourth preset condition includes the motor's operating power ratio being above the upper limit of a preset range; the fifth preset condition includes: the first temperature value of the outdoor environment being above a second temperature threshold, and the first temperature value of the liquid pipe being below the first temperature threshold and maintained for a first preset duration; the sixth preset condition includes: the first temperature value of the outdoor environment being below the second temperature threshold, and the first temperature value of the liquid pipe being below a third temperature threshold and maintained for a first preset duration.

[0025] In some embodiments, after controlling the air conditioning system to switch from heating mode to defrost mode, the method further includes: obtaining a second temperature value of the liquid pipe and a discharge pressure value of the compressor; and controlling the air conditioning system to switch from defrost mode to heating mode when a seventh preset condition is met, the seventh preset condition including: the second temperature value of the liquid pipe is above a fourth temperature threshold, or the discharge pressure value of the compressor is above a preset pressure threshold.

[0026] In some embodiments, after controlling the air conditioning system to switch from defrost mode to heating mode, the method further includes: acquiring the chassis temperature value of the outdoor unit; when the chassis temperature value of the outdoor unit is detected to be above a fifth temperature threshold, controlling the heating device to turn off; or, when the chassis temperature value of the outdoor unit is detected to be between the fifth temperature threshold and a sixth temperature threshold, controlling the heating device to operate at a first preset power for a second preset time and then turn off, wherein the sixth temperature threshold is below the fifth temperature threshold; or, when the chassis temperature value of the outdoor unit is detected to be below the sixth temperature threshold, controlling the heating device to operate at a second preset power for a third preset time and then turn off.

[0027] Thirdly, embodiments of this application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes a control method for an air conditioning system provided in the second aspect.

[0028] Fourthly, embodiments of this application provide a computer-readable storage medium including computer instructions that, when executed on a computer, cause the computer to perform a control method for an air conditioning system provided in the second aspect.

[0029] Fifthly, embodiments of the present invention provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can realize the control method of an air conditioning system provided in the second aspect.

[0030] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor, or it may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0031] The beneficial effects described in aspects two through five of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description

[0032] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0033] Figure 1 This is a schematic diagram of the composition of an air conditioning system provided in an embodiment of this application;

[0034] Figure 2This application provides an example of an outdoor unit's exterior appearance.

[0035] Figure 3 A schematic diagram of the refrigerant circulation loop of an air conditioning system provided in this application embodiment;

[0036] Figure 4 This application provides a schematic diagram of the structure of an outdoor unit according to an embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the internal structure of an outdoor unit provided in an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the structure of the bottom of an outdoor unit provided in an embodiment of this application;

[0039] Figure 7 This is a schematic diagram of the bottom of an outdoor unit provided in an embodiment of this application;

[0040] Figure 8 A hardware configuration block diagram of an air conditioning system provided in an embodiment of this application;

[0041] Figure 9 A flowchart illustrating a control method for an air conditioning system provided in an embodiment of this application;

[0042] Figure 10 A schematic diagram illustrating the relationship between a third temperature threshold and the outdoor ambient temperature, provided in an embodiment of this application;

[0043] Figure 11 A flowchart illustrating another control method for an air conditioning system provided in an embodiment of this application;

[0044] Figure 12 A flowchart illustrating another control method for an air conditioning system provided in an embodiment of this application;

[0045] Figure 13 A flowchart illustrating another control method for an air conditioning system provided in an embodiment of this application;

[0046] Figure 14 This is a schematic diagram of the overall flow of a control method for an air conditioning system provided in an embodiment of this application;

[0047] Figure 15 This is a schematic diagram of the hardware structure of a controller provided in an embodiment of this application. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0052] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0053] As described in the background section above, by adding a subcooling section to the heat exchanger chassis, the air conditioning system experiences significant pressure loss during heating mode operation, which reduces the heating performance and operational stability of the air conditioning system.

[0054] Based on this, this application provides an air conditioning system and its control method. A heating device is installed at the bottom of the outdoor unit. When any one of the first, second, or third preset conditions is met, it indicates that the outdoor unit is in a state about to frost. It is understood that after the outdoor unit frosts, the heating effect of the air conditioning system is poor. If the condensate on the chassis of the outdoor unit is not drained in time, it will freeze on the chassis. After the frost layer is full, the motor efficiency will decrease, which will lead to a decrease in the fan speed. Based on this, the heating device is controlled to start and work, raising the temperature of the outdoor unit chassis, preventing the condensate on the outdoor unit chassis from freezing, and defrosting the outdoor unit chassis to prevent the fan speed from decreasing. This improves the stability of the air conditioning system and helps to enhance the user experience.

[0055] To further describe the solution in this application, as follows: Figure 1 The diagram shown is a schematic representation of an air conditioning system according to an embodiment of this application. Figure 1 As shown, the air conditioning system 10 includes an outdoor unit 11, an indoor unit 12, and a controller 13. Figure 1 (Not shown in the image).

[0056] Outdoor unit 11 is typically installed outdoors for heat exchange with the outdoor environment. Additionally, in Figure 1 In the diagram, outdoor unit 11 is shown as a dashed line because it is located on the opposite side of indoor unit 12, separated by a wall.

[0057] In some embodiments, such as Figure 2 The diagram shown is an external schematic of an outdoor unit according to an embodiment of this application. This outdoor unit is a dual-fan type. Optionally, the outdoor unit can also be a single-fan type, etc., and this embodiment of the application does not limit this.

[0058] Indoor unit 12, which is used as an indoor wall-mounted unit ( Figure 1 For example, as shown in the image, indoor wall-mounted air conditioners are typically installed on indoor walls. Another example is indoor floor-standing air conditioners (…). Figure 1 (Not shown in the image) is also a type of indoor unit.

[0059] There is a pipe connection between the outdoor unit 11 and the indoor unit 12. The pipe, also known as a gas-liquid pipe, includes a gas pipe for transmitting gaseous refrigerant and a liquid pipe for transmitting two-phase refrigerant.

[0060] In some embodiments, controller 13 refers to a device that can generate operation control signals based on instruction opcodes and timing signals to instruct the air conditioning system to execute control commands. Exemplarily, the controller can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller can also be other devices with processing capabilities, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0061] In addition, the controller 13 can be used to control the operation of various components inside the air conditioning system 10 so that the various components of the air conditioning system 10 can operate to achieve the predetermined functions of the air conditioning system.

[0062] In some embodiments, the air conditioning system 10 may also include a remote control, which may exist independently outside the air conditioning system 10, and has several buttons on it. Different buttons can adjust the state of the air conditioning system 10, such as adjusting the operating mode of the air conditioning system.

[0063] Figure 3 This is a schematic diagram of the refrigerant circulation loop of an air conditioning system provided in an embodiment of this application. Figure 3 As shown, the circulation loop of the air conditioning system 10 includes a compressor 111, a four-way valve 112, a gas-liquid separator 113, an outdoor heat exchanger 114, an expansion valve 115, and an indoor heat exchanger 116.

[0064] In some embodiments, compressor 111 is connected to controller 13. Compressor 111 is configured between four-way valve 112 and gas-liquid separator 113 for compressing refrigerant supplied by gas-liquid separator 113 and supplying the compressed refrigerant to the air conditioning system via four-way valve 112. Compressor 111 may be a variable-capacity inverter compressor that performs inverter-based speed control.

[0065] In some embodiments, the four-way valve 112 is connected to the controller 13. The four-way valve 112 is a control valve with four ports, which are respectively connected to the compressor 111, the gas-liquid separator 113, the outdoor heat exchanger 114, and the indoor heat exchanger 116. The four-way valve 112 is used to achieve mutual conversion between cooling and heating by changing the flow direction of refrigerant in the system pipeline.

[0066] In some embodiments, the solenoid valve coil on the four-way valve is energized and in the open state. Under the magnetic force generated by the solenoid coil, the pilot slide valve overcomes the tension of the compression spring and moves to the right. High-pressure gas enters the capillary tube and then enters the left piston chamber. On the other hand, the gas in the right piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the right, so that the exhaust pipe is connected to the indoor unit pipe, and the other two pipes are connected to form a heating cycle.

[0067] In some embodiments, one end of the gas-liquid separator 113 is connected to the compressor 111, and the other end is connected to the four-way valve 112. In the gas-liquid separator 113, the refrigerant flowing from the outdoor unit 11 to the compressor 111 via the four-way valve 112 is separated into gaseous refrigerant and liquid refrigerant. Furthermore, gaseous refrigerant is primarily supplied from the gas-liquid separator 113 to the suction port of the compressor 111.

[0068] In some embodiments, the outdoor heat exchanger 114 is a U-shaped outdoor heat exchanger connected to the controller 13, and has a large heat exchange area, which can improve the heat exchange efficiency of the outdoor heat exchanger 114. One end of the outdoor heat exchanger 114 is connected to the indoor heat exchanger 116 through a liquid pipe, and the other end is connected to the compressor 111 through a gas pipe. The outdoor heat exchanger 114 is usually installed outdoors for heat exchange with the outdoor environment. In cooling mode, the gaseous refrigerant in the outdoor heat exchanger 114 releases heat and converts into liquid refrigerant, acting as a condenser; in heating mode, the liquid refrigerant in the outdoor heat exchanger 114 absorbs heat and converts into gaseous refrigerant, acting as an evaporator.

[0069] In some embodiments, expansion valve 115 is connected to controller 13. Expansion valve 115 is disposed between outdoor heat exchanger 114 and indoor heat exchanger 116. Expansion valve 115 consists of a valve body and a coil, and has the function of expanding and depressurizing the refrigerant flowing through it, thus regulating the refrigerant supply in the pipeline. If expansion valve 115 decreases its opening, the flow resistance of the refrigerant through it increases. If expansion valve 115 increases its opening, the flow resistance decreases. Thus, even if the states of other devices in the circuit remain unchanged, the refrigerant flow rate in the air conditioning system changes when the opening of electronic expansion valve 115 changes.

[0070] In some embodiments, the indoor heat exchanger 116 is connected to a controller. One end of the indoor heat exchanger 116 is connected to an expansion valve 115, and the other end is connected to a four-way valve 112. The indoor heat exchanger 116 is typically installed indoors for heat exchange with the indoor environment. In cooling mode, the liquid refrigerant in the indoor heat exchanger 116 absorbs heat and converts into gaseous refrigerant, functioning as an evaporator; in heating mode, the gaseous refrigerant in the indoor heat exchanger 116 releases heat and converts into liquid refrigerant, functioning as a condenser.

[0071] Figure 4 This is a structural schematic diagram of an outdoor unit 11 provided in an embodiment of this application. Figure 4 As shown, the outdoor unit 11 includes a compressor 111, a four-way valve 112, a gas-liquid separator 113, an outdoor heat exchanger 114, an expansion valve 115, a first temperature sensor 117, an outdoor fan 118, a motor 119, a gas shut-off valve 120, a liquid shut-off valve 121, a second temperature sensor 122 (not shown in the figure), and a pressure sensor 123.

[0072] For descriptions of compressor 111, four-way valve 112, gas-liquid separator 113, outdoor heat exchanger 114, and expansion valve 115, please refer to the above. Figure 3 The description in the text will not be repeated here.

[0073] In some embodiments, a first temperature sensor 117 is connected to a controller 13 and is located on an outdoor heat exchanger. It is used to detect the temperature of the liquid pipe and send the detected temperature value to the controller 13.

[0074] In some embodiments, the outdoor fan 118 generates an airflow of outdoor air through the outdoor heat exchanger 114 to promote heat exchange between the refrigerant in the outdoor heat exchanger and the outdoor environment.

[0075] In some embodiments, the motor 119 is connected to the controller 13 to drive the outdoor fan.

[0076] In some embodiments, the controller 13 can obtain the operating power of the motor 119 in real time.

[0077] In some embodiments, the gas shut-off valve 120 is connected to the controller 13 and is installed on the gas pipe of the outdoor unit 11 to control the connection and disconnection of the gas pipe.

[0078] In some embodiments, the liquid shut-off valve 121 is connected to the controller 13 and is installed on the liquid pipe of the outdoor unit 11 to control the connection and disconnection of the liquid pipe.

[0079] In some embodiments, the second temperature sensor 122 is connected to the controller 13 and is disposed on the outdoor unit 11 to detect the temperature value of the outdoor environment and transmit the detected temperature value of the environment where the outdoor unit 11 is located to the controller 13.

[0080] In some embodiments, the pressure sensor 123 is connected to the controller 13 and is located at the exhaust port of the compressor to detect the exhaust pressure value of the compressor and send the detected exhaust pressure value of the compressor to the controller 13.

[0081] In some embodiments, such as Figure 5The diagram shown is a schematic representation of the internal structure of an outdoor unit according to an embodiment of this application. The outdoor unit 11 includes a compressor 111, an outdoor heat exchanger 114, an outdoor fan 118, an electrical control assembly 124, a piping assembly, and a throttling device 125.

[0082] For a description of compressor 111, outdoor heat exchanger 114, and outdoor fan 118, please refer to the above. Figure 3 and Figure 4 The description in the text will not be repeated here.

[0083] In some embodiments, the electronic control component 124 is disposed on the side of the outdoor unit and is used to control the disconnection and connection of the outdoor unit circuit.

[0084] In some embodiments, the piping assembly and throttling device 125 are disposed on the side of the outdoor unit, wherein the piping assembly is used to connect the indoor unit and the outdoor unit, and the piping is also referred to as a gas-liquid pipe, including: a gas pipe for conveying gaseous refrigerant and a liquid pipe for conveying two-phase refrigerant; the throttling device is used to throttle and reduce the pressure of high-pressure refrigerant.

[0085] In some embodiments, the air conditioning system further includes a plurality of third temperature sensors 141 and a heating device 142.

[0086] like Figure 6 The diagram shown is a structural schematic of the bottom of an outdoor unit according to an embodiment of this application. The bottom of the outdoor unit is provided with a chassis 14, which is used to hold the condensate of the air conditioning system 10.

[0087] In some embodiments, a plurality of third temperature sensors 141 are connected to the controller 13 and are spaced apart on the chassis 14 of the outdoor unit. Each third temperature sensor is used to detect the chassis temperature value of the outdoor unit and send the detected chassis temperature value to the controller 13.

[0088] In some embodiments, the heating device 142 is connected to the controller 13 and is disposed at the bottom of the outdoor unit 11 to heat the chassis 14 of the outdoor unit and increase the temperature of the outdoor unit.

[0089] In some embodiments, such as Figure 7 The diagram shown is an external view of the bottom of an outdoor unit according to an embodiment of this application. The heating device 142 is disposed on the chassis 14 and is located at a position slightly to the right of the bottom of the outdoor unit. Optionally, the heating device 142 may also be located at other positions on the bottom of the outdoor unit, and this embodiment of the application does not limit this.

[0090] Figure 8 The diagram shown is a hardware configuration block diagram of an air conditioning system provided in an embodiment of this application. Figure 8As shown, the air conditioning system 10 may also include a communicator 130 and a memory 140.

[0091] In some embodiments, the communicator 130 is used to establish communication connections with other network entities, such as establishing communication connections with terminal devices. The communicator 130 may include a radio frequency (RF) module, a cellular module, a wireless fidelity (WIFI) module, and a GPS module, etc. Taking an RF module as an example, the RF module can be used for signal reception and transmission; specifically, it sends received information to the controller 13 for processing; additionally, it transmits signals generated by the controller 13. Typically, the RF circuit may include, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier (LNA), a duplexer, etc.

[0092] The memory 140 can be used to store software programs and data. The controller 13 executes various functions of the air conditioning system 10 and performs data processing by running the software programs or data stored in the memory 140. The memory 140 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. The memory 140 stores the operating system that enables the air conditioning system 10 to run. In this application, the memory 140 may store the operating system and various application programs, and may also store code that executes the control method of the air conditioning system provided in the embodiments of this application.

[0093] Those skilled in the art will understand that Figure 8 The hardware structure shown does not constitute a limitation on the air conditioning system. The air conditioning system may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0094] The embodiments provided in this application will now be described in detail with reference to the accompanying drawings.

[0095] This application provides a control method for an air conditioning system, which is applied to a controller, and the controller can be as described above. Figure 8 The controller 13 shown is as follows: Figure 9 As shown, the method includes the following steps:

[0096] S101. When the air conditioning system is in heating mode, obtain the motor's operating power, the first temperature value of the liquid pipe, and the first temperature value of the outdoor environment.

[0097] In some embodiments, the user sends a heating start command to the air conditioning system via a terminal device or the air conditioning system's remote control. Upon receiving the heating start command, the controller controls the air conditioning system to start and enter heating mode in response to the air conditioning system's heating start command.

[0098] In some embodiments, to avoid the outdoor unit from frosting and thus reducing the heating effect of the air conditioning system, when the air conditioning system is in heating mode, the controller obtains the motor's operating power, obtains the first temperature value of the liquid pipe through the first temperature sensor, and obtains the first temperature value of the outdoor environment through the second temperature sensor.

[0099] S102. If any one of the first preset condition, the second preset condition, or the third preset condition is met, control the heating device to start and operate at the first preset power.

[0100] In some embodiments, the first preset condition includes: the motor's operating power ratio is within a preset range, and the first temperature value of the liquid pipe is above a first temperature threshold. The motor's operating power ratio is determined based on the motor's initial operating power and current operating power.

[0101] The preset range, the first temperature threshold, and the first preset power can be preset at the factory of the air conditioning system. For example, the preset range is 0.1-0.2, the first temperature threshold is 0 degrees Celsius (°C), and the first preset power is low power.

[0102] In some embodiments, the motor operating power ratio is determined based on the motor's initial operating power and current operating power. For example, the motor operating power ratio can be determined by the following formula (1):

[0103]

[0104] Where S is the operating power ratio of the motor, and P i To obtain the current operating power of the motor, P o This represents the initial operating power of the motor.

[0105] In some embodiments, the initial operating power of the motor is determined by the following method: after the controller controls the air conditioning system to operate in heating mode for a period of time and then enters a stable operating phase, after a preset time period, the controller records the real-time operating power of the motor and records the real-time operating power of the motor multiple times, and then determines the initial operating power of the motor based on the real-time operating power of the motor multiple times.

[0106] Optionally, the average of the real-time operating power of the motor over multiple cycles can be used as the initial operating power of the motor.

[0107] For example, the controller can record the real-time operating power of the motor six times, and then use the average of the real-time operating power of the motor six times as the initial operating power of the motor.

[0108] In some embodiments, when the controller detects that the operating power ratio of the motor is within a preset range and the liquid pipe temperature is above a first temperature threshold, it controls the heating device to start and operate at a first preset power.

[0109] Understandably, when the motor's operating power ratio is detected to be within the preset range and the liquid pipe temperature is above the first temperature threshold, the liquid pipe temperature is low, indicating that the outdoor unit is about to frost. Based on this, the heating device is activated and operates at the first preset power to prevent frost formation on the outdoor unit. It's understandable that after the outdoor unit frosts, the air conditioning system's heating effect is poor. If the condensate on the outdoor unit's chassis is not drained in time, it will freeze on the chassis. Once the frost layer is full, the motor's efficiency decreases, leading to a decrease in fan speed. Therefore, when the motor's operating power ratio is detected to be within the preset range and the liquid pipe temperature is above the first temperature threshold, the heating device is activated and operates at the first preset power to increase the temperature of the outdoor unit's chassis, prevent the condensate from freezing, defrost the chassis, prevent the fan speed from decreasing, ensure the air conditioning system's heating capacity, improve the system's operational stability, and enhance the user experience.

[0110] For example, suppose the initial operating power of the motor is 100 watts (W), the current operating power of the motor is 111W, and the detected temperature of the liquid pipe is 1°C. The motor's operating power ratio is calculated to be 0.11, and the temperature of the liquid pipe is greater than 0°C, which meets the first preset condition. The heating device is then controlled to start and operate at the first preset power.

[0111] In some embodiments, the second preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is above the second temperature threshold, and the first temperature value of the liquid pipe is below the first temperature threshold and remains below the first preset duration.

[0112] The second temperature threshold and the first preset duration are preset at the factory when the air conditioning system leaves the factory. For example, the second temperature threshold is 0°C. The first preset duration is 10 minutes (M).

[0113] In some embodiments, when the controller detects that the motor's operating power ratio is within a preset range, the outdoor environment's first temperature value is above a second temperature threshold, and the liquid pipe's first temperature value is below the first temperature threshold and remains below a first preset time, the controller controls the heating device to start and operate at a first preset power to increase the outdoor unit's chassis temperature, thereby defrosting the outdoor unit's chassis in advance.

[0114] Understandably, when the motor's operating power ratio is detected to be within a preset range, the outdoor ambient temperature is above the second temperature threshold, and the liquid pipe's temperature is below the first temperature threshold and remains below the first preset duration, the liquid pipe's temperature is low, indicating that the outdoor unit's chassis is in a frosty state. Based on this, the heating device is controlled to turn on and operate at the first preset power to increase the outdoor unit's chassis temperature, defrosting the outdoor unit's chassis in advance, ensuring the air conditioning system's heating capacity, improving the air conditioning system's operational stability, and helping to enhance the user experience.

[0115] For example, assuming the initial operating power of the motor is 100W, the current operating power of the motor is 111W, the detected outdoor ambient temperature is 2℃, and the liquid pipe temperature is -1℃ for 5M. The calculated operating power ratio of the motor is 0.11. The outdoor ambient temperature is above 0℃, and the liquid pipe temperature is below 0℃ and has not been below 10M for 10M, which meets the second preset condition. The heating device is then controlled to start and operate at the first preset power.

[0116] In some embodiments, the third preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is below the second temperature threshold, and the first temperature value of the liquid pipe is below the third temperature threshold and remains below the first preset duration.

[0117] The third temperature threshold is preset at the factory when the air conditioning system leaves the factory. For example, the third temperature threshold is determined based on the ambient temperature. Figure 10 As shown, the lower the ambient temperature, the smaller the third temperature threshold.

[0118] In some embodiments, when the controller detects that the motor's operating power ratio is within a preset range, the first outdoor temperature value is below a second temperature threshold, and the first liquid pipe temperature value is below a third temperature threshold and remains below a first preset duration, the controller controls the heating device to start and operate at a first preset power to prevent the condensate water not discharged from the chassis of the outdoor unit from freezing, thereby improving the operational stability of the air conditioning system.

[0119] Understandably, when the motor's operating power ratio is detected to be within a preset range, the outdoor ambient temperature is below the second temperature threshold, and the liquid pipe temperature is below the third temperature threshold and remains below the first preset duration, the outdoor ambient temperature and liquid pipe temperature are both low, indicating that the outdoor unit's temperature is low and it is about to frost. Based on this, the heating device is activated and operates at the first preset power to increase the temperature of the outdoor unit's chassis, preventing the condensate not drained from the chassis from freezing, defrosting the chassis, preventing the fan speed from decreasing, improving the stability of the air conditioning system, and enhancing the user experience.

[0120] For example, the initial operating power of the motor is 100W, the current operating power of the motor is 111W, the outdoor ambient temperature is -6℃, and the liquid pipe temperature is -11℃ for 6 minutes. The calculated operating power ratio of the motor is 0.11. The outdoor ambient temperature is below 0℃, and the liquid pipe temperature is below the third temperature threshold and has not been maintained for 10 minutes, which meets the third preset condition. The heating device is then controlled to start and operate at the first preset power.

[0121] based on Figure 9 The illustrated embodiments offer at least the following beneficial effects: This application provides an air conditioning system that includes a heating device installed at the bottom of the outdoor unit. When any one of the first, second, or third preset conditions is met, it indicates that the outdoor unit is about to frost. It is understood that after the outdoor unit frosts, the air conditioning system's heating effect is poor. If the condensate on the outdoor unit's chassis is not drained in time, it will freeze on the chassis. Once the frost layer is full, the motor's efficiency decreases, leading to a reduction in fan speed. Therefore, controlling the heating device to start and operate raises the temperature of the outdoor unit's chassis, preventing the condensate from freezing and defrosting the chassis, preventing a decrease in fan speed, improving the stability of the air conditioning system, and enhancing the user experience.

[0122] In some embodiments, after step S101, as Figure 11 As shown, the control method further includes the following steps:

[0123] S201. If any one of the fourth, fifth, or sixth preset conditions is met, control the air conditioning system to switch from heating mode to defrosting mode, and control the heating device to start and operate at the second preset power.

[0124] The second preset power is set at the factory when the air conditioning system leaves the factory. The second preset power is above the first preset power, that is, the second preset power is greater than the first preset power. The second preset power is a high power.

[0125] In some embodiments, the fourth preset condition includes: the motor's operating power ratio is above the upper limit of a preset range. The second preset power is preset at the factory when the air conditioning system leaves the factory.

[0126] Understandably, when the air conditioning system is running in heating mode, the outdoor heat exchanger operates as an evaporator. When the motor's operating power ratio is above the upper limit of the preset range, it indicates that the current real-time operating power of the motor is high, and the outdoor heat exchanger has high heat exchange efficiency, meaning that the outdoor heat exchanger absorbs heat and evaporates the refrigerant efficiently. This results in a lower outdoor unit temperature, at which point the outdoor unit has begun to frost. To prevent the air conditioning system from malfunctioning due to frost buildup, the system can be switched from heating mode to defrost mode to defrost the outdoor unit. The heating device is also activated and operates at a second preset power to prevent condensate from freezing on the outdoor unit's chassis and to improve defrost efficiency, thus reducing the time the air conditioning system spends in defrost mode. It's also understandable that the air conditioning system may not be able to effectively heat the indoor environment while in defrost mode. Therefore, by activating the heating device and operating at a second preset power to improve defrost efficiency and reduce the time the air conditioning system spends in defrost mode, it's possible to quickly switch back to heating mode to heat the indoor environment, improving the user experience.

[0127] For example, assuming the initial operating power of the motor is 100W and the current operating power of the motor is 121W, the calculated operating power ratio of the motor is 0.21. The operating power ratio of the motor is above the upper limit of the preset range, which satisfies the fourth preset condition. Therefore, the air conditioning system is controlled to switch from heating mode to defrosting mode, and the heating device is controlled to start and work at the second preset power.

[0128] In some embodiments, the fifth preset condition includes: the first temperature value of the outdoor environment is above the second temperature threshold, and the first temperature value of the liquid pipe is below the first temperature threshold and remains below the first preset duration.

[0129] Understandably, if the liquid pipe temperature is below the first temperature threshold and remains below it for a first preset duration, the outdoor unit has begun to frost. At this point, the air conditioning system switches from heating mode to defrost mode to defrost the outdoor unit. The heating device is also activated and operates at a second preset power to prevent the condensate on the outdoor unit's chassis from freezing and to improve the defrosting efficiency of the outdoor unit. This reduces the time the air conditioning system spends in defrost mode, allowing it to quickly switch back to heating mode to provide heating for users in the indoor environment, thus improving the user experience.

[0130] For example, suppose the outdoor ambient temperature is 2°C, the liquid pipe temperature is -3°C, and this has been maintained for 10 minutes. If the outdoor ambient temperature is above 0°C and the liquid pipe temperature is below the third temperature threshold for 10 minutes, the fifth preset condition is met, and the air conditioning system is controlled to switch from heating mode to defrost mode, and the heating device is controlled to start and operate at the second preset power.

[0131] In some embodiments, the sixth preset condition includes: the first temperature value of the outdoor environment is below the second temperature threshold, and the first temperature value of the liquid pipe is below the third temperature threshold and remains below the first preset duration.

[0132] Understandably, when the outdoor ambient temperature is detected to be below the second temperature threshold and the liquid pipe temperature is below the third temperature threshold for a first preset duration, the outdoor ambient temperature is low, the liquid pipe temperature is also low, and the outdoor environment and liquid pipe have been in a low-temperature state for the first preset duration, indicating that the outdoor unit has begun to frost. The air conditioning system is then controlled to switch from heating mode to defrost mode to defrost the outdoor unit. The heating device is also controlled to start and operate at the second preset power to prevent the condensate on the outdoor unit's chassis from freezing and to improve the defrosting efficiency of the outdoor unit. This reduces the time the air conditioning system is in defrost mode, allowing the system to quickly switch to heating mode to heat the indoor environment and improve the user experience.

[0133] For example, suppose the outdoor ambient temperature is -5℃ and the liquid pipe temperature is -12℃, and this has been maintained for 10 minutes. If the outdoor ambient temperature is below 0℃ and the liquid pipe temperature remains below the third temperature threshold for 10 minutes, the sixth preset condition is met. In this case, the air conditioning system is controlled to switch from heating mode to defrost mode, and the heating device is controlled to start and operate at the second preset power.

[0134] based on Figure 11 The illustrated embodiments offer at least the following beneficial effects: This application provides an air conditioning system and its control method. By installing a heating device at the bottom of the outdoor unit, the outdoor unit begins to frost when any one of the fourth, fifth, or sixth preset conditions is met. To prevent the air conditioning system from malfunctioning after the outdoor unit frosts, the system is controlled to switch from heating mode to defrost mode. The heating device is activated and operates at a second preset power to prevent the condensate on the chassis of the outdoor unit from freezing and to improve the defrosting efficiency of the outdoor unit. This reduces the time the air conditioning system spends in defrost mode, allowing the system to quickly switch to heating mode to provide heating for users in the indoor environment, thus improving the user experience.

[0135] In some embodiments, after step S201, as Figure 12 As shown, the method also includes the following steps:

[0136] S301, Obtain the second temperature value of the liquid pipe and the discharge pressure value of the compressor.

[0137] In some embodiments, in order to know in a timely manner whether the defrosting mode needs to be ended, after the controller controls the air conditioning system to switch from the heating mode to the defrosting mode, the controller obtains the second temperature value of the liquid pipe through the first temperature sensor and obtains the discharge pressure value of the compressor through the pressure sensor, so as to determine whether the defrosting mode needs to be ended based on the second temperature value of the liquid pipe and the discharge pressure value of the compressor.

[0138] S302. Under the condition that the seventh preset condition is met, control the air conditioning system to switch from defrosting mode to heating mode.

[0139] In some embodiments, the seventh preset condition includes: the second temperature value of the liquid pipe is above the fourth temperature threshold, or the discharge pressure value of the compressor is above the preset pressure threshold. The fourth temperature threshold and the preset pressure threshold are preset at the factory of the air conditioning system; for example, the fourth temperature threshold is 15°C and the preset pressure threshold is 1.5 MPa.

[0140] In some embodiments, when the compressor discharge pressure is detected to be above a preset pressure threshold, the air conditioning system is controlled to switch from defrost mode to heating mode.

[0141] Understandably, when the compressor discharge pressure is detected to be above the preset pressure threshold, it means that the compressor discharge pressure is high, indicating that the frost on the outdoor unit has been cleared. The air conditioning system can then be switched from defrosting mode to heating mode to heat the indoor environment, increase the indoor temperature, and improve the user experience.

[0142] For example, suppose the detected compressor discharge pressure is 1.7 MPa. If the compressor discharge pressure is above 1.5 MPa, the seventh preset condition is met, and the air conditioning system is controlled to switch from defrost mode to heating mode.

[0143] In some embodiments, when the controller detects that the second temperature value of the liquid pipe is above the fourth temperature threshold, it can also control the air conditioning system to switch from defrosting mode to heating mode.

[0144] Understandably, when the second temperature value of the liquid pipe is detected to be above the fourth temperature threshold, it means that the liquid pipe temperature is high, indicating that the frost on the outdoor unit has been cleared. The air conditioning system can then be switched from defrosting mode to heating mode to heat the indoor environment.

[0145] For example, suppose the detected liquid pipe temperature is 18°C. When the liquid pipe temperature is above 15°C, the seventh preset condition is met, and the air conditioning system is controlled to switch from defrost mode to heating mode.

[0146] In some embodiments, controlling the air conditioning system to switch from defrost mode to heating mode can be specifically implemented by controlling the four-way valve to switch from a closed state to an open state, so that the air conditioning system switches from defrost mode to heating mode.

[0147] In some embodiments, after step S302, such as Figure 13 As shown, the method also includes the following steps:

[0148] S401. Obtain the chassis temperature value of the outdoor unit.

[0149] As can be seen from the above description of the air conditioning system, the air conditioning system includes multiple third temperature sensors.

[0150] Obtaining the chassis temperature value of the outdoor unit can be specifically achieved by: acquiring the initial chassis temperature values ​​of multiple outdoor units through multiple third temperature sensors, and determining the chassis temperature value of the outdoor unit based on the initial chassis temperature values ​​of multiple outdoor units.

[0151] Optionally, the average of the initial chassis temperature values ​​of multiple outdoor units can be used as the chassis temperature value of the outdoor unit.

[0152] S402. When the chassis temperature of the outdoor unit is detected to be above the fifth temperature threshold, the heating device is turned off.

[0153] The fifth temperature threshold can be preset at the factory when the air conditioning system leaves the factory; for example, the fifth temperature threshold is 5°C.

[0154] Understandably, when the detected temperature of the outdoor unit's chassis is above the fifth temperature threshold, it indicates a high chassis temperature, preventing condensate from freezing on the chassis. Therefore, shutting off the heating element reduces power consumption, lowers the air conditioning system's energy consumption, and decreases noise, thus improving the user experience. Furthermore, shutting off the heating element extends the effective lifespan of the outdoor unit's chassis, effectively extending its service life.

[0155] For example, suppose the detected chassis temperature of the outdoor unit is 7°C. If the chassis temperature of the outdoor unit is above 5°C, the heating device will be shut off.

[0156] S403. When the chassis temperature of the outdoor unit is detected to be between the fifth temperature threshold and the sixth temperature threshold, the heating device is controlled to run at the first preset power for a second preset time and then shut off.

[0157] The second preset duration and the sixth temperature threshold can be preset at the factory of the air conditioning system. For example, the second preset duration is 5 minutes, and the sixth temperature threshold is below the fifth temperature threshold. Optionally, the sixth temperature threshold can be 2°C.

[0158] Understandably, when the detected chassis temperature of the outdoor unit is between the fifth and sixth temperature thresholds, it indicates a low chassis temperature, and there is a possibility of icing on the chassis. Therefore, the heating device is controlled to operate at a first preset power for a second preset time and then shut off, thereby raising the chassis temperature of the outdoor unit. This prevents condensation on the chassis from freezing, improves the stability of the air conditioning system, and enhances the user experience.

[0159] For example, suppose the detected chassis temperature of the outdoor unit is 3.5°C. If the chassis temperature is between 2°C and 5°C, the heating device is controlled to operate at a first preset power for 5 minutes, and then the heating device is controlled to turn off.

[0160] S404. When the chassis temperature of the outdoor unit is detected to be below the sixth temperature threshold, the heating device is controlled to operate at the second preset power for a third preset time and then shut off.

[0161] The third preset duration is set at the factory when the air conditioning system leaves the factory; for example, the third preset duration is 8 minutes.

[0162] Understandably, when the detected temperature of the outdoor unit's chassis is below the sixth temperature threshold, it indicates a low chassis temperature. If condensation is present on the chassis at this time, it will quickly freeze. To prevent the condensation on the chassis from freezing and affecting the normal operation of the air conditioning system, the heating device is controlled to operate at the second preset power for a third preset time and then shut off. This allows the chassis temperature to rise rapidly, melting the ice formed by the condensation and preventing it from refreezing. This ensures the normal operation of the air conditioning system, improves its stability, and enhances the user experience.

[0163] For example, assuming the detected chassis temperature of the outdoor unit is -0.5℃, which is below 2℃, the heating device is controlled to operate at the second preset power for 8 minutes, and then the heating device is controlled to turn off.

[0164] based on Figure 13The embodiments shown bring at least the following beneficial effects: This application provides an air conditioning system and its control method, which obtains the chassis temperature value of the outdoor unit after the air conditioning system switches from defrosting mode to heating mode. When the outdoor unit's chassis temperature is detected to be above the fifth temperature threshold, the heating device is shut off to reduce power consumption, lower the air conditioning system's energy consumption, and reduce noise, thus improving the user experience. Shutting off the heating device also helps extend the effective service life of the outdoor unit's chassis. When the outdoor unit's chassis temperature is detected to be between the fifth and sixth temperature thresholds, the heating device operates at a first preset power for a second preset time before shutting off, allowing the outdoor unit's chassis temperature to rise and preventing condensation on the chassis from freezing, improving the stability of the air conditioning system and further enhancing the user experience. When the outdoor unit's chassis temperature is detected to be below the sixth temperature threshold, the heating device operates at a second preset power for a third preset time before shutting off, rapidly raising the outdoor unit's chassis temperature to melt any ice formed from condensation on the chassis and preventing re-freezing, ensuring the normal operation of the air conditioning system and improving its stability, further enhancing the user experience.

[0165] The following example illustrates a control method for an air conditioning system provided in this application. Figure 14 The diagram shown is an overall flow chart of a control method for an air conditioning system provided in this application according to an exemplary embodiment. Figure 14 As shown:

[0166] Upon receiving the heating start command from the air conditioning system, the system starts and enters heating mode. It acquires the motor's operating power, the initial temperature of the liquid line, and the initial outdoor ambient temperature. If any one of the first, second, or third preset conditions is met, the heating device is activated and operates at the first preset power to increase the temperature of the outdoor unit's chassis, prevent condensate from freezing on the chassis, defrost the chassis, prevent the fan speed from decreasing, improve the stability of the air conditioning system, and enhance the user experience. If any one of the fourth, fifth, or sixth preset conditions is met, the air conditioning system is switched from heating mode to defrost mode, the heating device is activated and operates at the second preset power to prevent condensate from freezing on the outdoor unit's chassis, improve defrost efficiency, and reduce the time the air conditioning system spends in defrost mode, allowing it to quickly switch to heating mode to heat the indoor environment, further enhancing the user experience. If the seventh preset condition is met, the liquid pipe temperature and compressor discharge pressure are high, the frost on the outdoor unit has been cleared, and the air conditioning system is switched from defrost mode to heating mode to heat the indoor environment, raising the indoor temperature and enhancing the user experience. When the outdoor unit's chassis temperature is detected to be above the fifth temperature threshold, the heating device is shut off to reduce power consumption, lower the air conditioning system's energy consumption, and reduce noise, thus improving the user experience. Shutting off the heating device also helps extend the effective service life of the outdoor unit's chassis. When the outdoor unit's chassis temperature is detected to be between the fifth and sixth temperature thresholds, the heating device operates at a first preset power for a second preset time before shutting off, allowing the outdoor unit's chassis temperature to rise and preventing condensation on the chassis from freezing, improving the stability of the air conditioning system and further enhancing the user experience. When the outdoor unit's chassis temperature is detected to be below the sixth temperature threshold, the heating device operates at a second preset power for a third preset time before shutting off, rapidly raising the outdoor unit's chassis temperature to melt any ice formed from condensation on the chassis and preventing re-freezing, ensuring the normal operation of the air conditioning system and improving its stability, further enhancing the user experience.

[0167] As can be seen, the above mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the embodiments of this application provide corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the modules and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0168] This application embodiment can divide the controller into functional modules according to the above method example. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. Optionally, the module division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0169] This application also provides a hardware structure diagram of a controller, such as... Figure 15 As shown, the controller 3000 includes a processor 3001, and optionally, a memory 3002 and a communication interface 3003 connected to the processor 3001. The processor 3001, memory 3002 and communication interface 3003 are connected via a bus 3004.

[0170] Processor 3001 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 3001 may also be any other device with processing capabilities, such as a circuit, device, or software module. Processor 3001 may also include multiple CPUs, and processor 3001 may be a single-core processor or a multi-core processor. Here, "processor" may refer to one or more devices, circuits, or processing cores used to process data (e.g., computer program instructions).

[0171] The memory 3002 can be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions. It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), a magnetic disk storage medium, or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 3002 can exist independently or be integrated with the processor 3001. The memory 3002 may contain computer program code. The processor 3001 executes the computer program code stored in the memory 3002 to implement the air conditioning system control method provided in this application embodiment.

[0172] The communication interface 3003 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The communication interface 3003 can be a module, circuit, transceiver, or any device capable of enabling communication.

[0173] Bus 3004 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Bus 3004 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 15 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0174] This invention also provides a computer-readable storage medium, which includes computer-executable instructions. When the computer-executable instructions are executed on the computer, the computer performs a control method for an air conditioning system as provided in the above embodiments.

[0175] This invention also provides a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can realize the control method of an air conditioning system provided in the above embodiments.

[0176] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this invention can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.

[0177] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0178] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and other division methods may exist in actual implementation. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate; components shown as units may be one physical unit or multiple physical units, i.e., they may be located in one place or distributed in multiple different places. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0179] Furthermore, the functional units in the various embodiments of this invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0180] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioning system, comprising: The outdoor unit includes a compressor, an outdoor heat exchanger, a four-way valve, an outdoor fan, and a motor, wherein the motor is used to drive the outdoor fan; Indoor unit, including indoor heat exchanger; One end of the outdoor heat exchanger is connected to the indoor heat exchanger via a liquid pipe, and the other end is connected to the compressor via a gas pipe; The air conditioning system is characterized in that it further includes: A heating device is installed at the bottom of the outdoor unit to heat the chassis of the outdoor unit; A first temperature sensor is installed in the outdoor heat exchanger to detect the temperature value of the liquid pipe; The second temperature sensor is installed on the outdoor unit and is used to detect the temperature value of the outdoor environment; A pressure sensor is installed at the exhaust port of the compressor to detect the exhaust pressure value of the compressor; The controller is configured as follows: When the air conditioning system is in heating mode, the operating power of the motor, the first temperature value of the liquid pipe, and the first temperature value of the outdoor environment are obtained. Under any one of the first preset condition, the second preset condition, or the third preset condition, the heating device is controlled to start and operate at the first preset power; the first preset condition includes: the operating power ratio of the motor is within a preset range, and the first temperature value of the liquid pipe is above the first temperature threshold, wherein the operating power ratio of the motor is determined based on the initial operating power and the current operating power of the motor; The second preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is above the second temperature threshold, and the first temperature value of the liquid pipe is below the first temperature threshold and remains below the first preset duration. The third preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is below the second temperature threshold, and the first temperature value of the liquid pipe is below the third temperature threshold and remains below the first preset duration. Under any of the following conditions, the fourth, fifth, or sixth preset conditions are met: the air conditioning system is switched from the heating mode to the defrosting mode; the heating device is started and operates at a second preset power, which is above the first preset power; the fourth preset condition includes the motor's operating power ratio being above the upper limit of the preset range; the fifth preset condition includes the outdoor environment's first temperature value being above the second temperature threshold, and the liquid pipe's first temperature value being below the first temperature threshold and remaining below it for the first preset duration; the sixth preset condition includes the outdoor environment's first temperature value being below the second temperature threshold, and the liquid pipe's first temperature value being below the third temperature threshold and remaining below it for the first preset duration. After controlling the air conditioning system to switch from the heating mode to the defrosting mode, the second temperature value of the liquid pipe and the discharge pressure value of the compressor are obtained; Under the condition of meeting the seventh preset condition, the air conditioning system is controlled to switch from the defrosting mode to the heating mode. The seventh preset condition includes: the second temperature value of the liquid pipe is above the fourth temperature threshold, or the discharge pressure value of the compressor is above the preset pressure threshold.

2. The air conditioning system according to claim 1, characterized in that, The outdoor heat exchanger is a U-shaped outdoor heat exchanger.

3. The air conditioning system according to claim 1, characterized in that, The air conditioning system also includes: Multiple third temperature sensors are spaced apart on the chassis of the outdoor unit, and each third temperature sensor is used to detect the temperature value of the chassis of the outdoor unit. The controller is also configured to: After the air conditioning system is switched from the defrosting mode to the heating mode, the chassis temperature value of the outdoor unit is obtained through the multiple third temperature sensors. When the chassis temperature of the outdoor unit is detected to be above the fifth temperature threshold, the heating device is controlled to shut off, or... When the chassis temperature of the outdoor unit is detected to be between the fifth and sixth temperature thresholds, the heating device is controlled to operate at the first preset power for a second preset time and then shut off, wherein the sixth temperature threshold is below the fifth temperature threshold; or... When the chassis temperature of the outdoor unit is detected to be below the sixth temperature threshold, the heating device is controlled to operate at the second preset power for a third preset time and then shut off.

4. The air conditioning system according to claim 1 or 3, characterized in that, The controller is configured to control the air conditioning system to switch from the defrosting mode to the heating mode, specifically configured as follows: Control the four-way valve to switch from the closed state to the open state, so that the air conditioning system switches from the defrost mode to the heating mode.

5. A control method for an air conditioning system, characterized in that, The method includes: When the air conditioning system is in heating mode, the operating power of the motor, the first temperature value of the liquid pipe, and the first temperature value of the outdoor environment are obtained. Under any one of the first preset condition, the second preset condition, or the third preset condition, the heating device is controlled to start and operate at the first preset power; the first preset condition includes: the operating power ratio of the motor is within a preset range, and the first temperature value of the liquid pipe is above the first temperature threshold, wherein the operating power ratio of the motor is determined based on the initial operating power and the current operating power of the motor; The second preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is above the second temperature threshold, and the first temperature value of the liquid pipe is below the first temperature threshold and remains below the first preset duration. The third preset conditions include: the operating power ratio of the motor is within a preset range, the first temperature value of the outdoor environment is below the second temperature threshold, and the first temperature value of the liquid pipe is below the third temperature threshold and remains below the first preset duration. If any one of the fourth, fifth, or sixth preset conditions is met, the air conditioning system is controlled to switch from the heating mode to the defrosting mode, and the heating device is controlled to start and operate at a second preset power, wherein the second preset power is greater than the first preset power. The fourth preset condition includes the motor's operating power ratio being above the upper limit of the preset range; The fifth preset condition includes: the first temperature value of the outdoor environment is above the second temperature threshold, and the first temperature value of the liquid pipe is below the first temperature threshold and remains below the first preset time. The sixth preset condition includes: the first temperature value of the outdoor environment is below the second temperature threshold, and the first temperature value of the liquid pipe is below the third temperature threshold and remains below the first preset duration; After controlling the air conditioning system to switch from the heating mode to the defrosting mode, the method further includes: Obtain the second temperature value of the liquid pipe and the discharge pressure value of the compressor; Under the condition of meeting the seventh preset condition, the air conditioning system is controlled to switch from the defrosting mode to the heating mode. The seventh preset condition includes: the second temperature value of the liquid pipe is above the fourth temperature threshold, or the discharge pressure value of the compressor is above the preset pressure threshold.

6. The method according to claim 5, characterized in that, After the air conditioning system is switched from the defrosting mode to the heating mode, the method further includes: Obtain the chassis temperature value of the outdoor unit; When the chassis temperature of the outdoor unit is detected to be above the fifth temperature threshold, the heating device is controlled to shut off, or... When the chassis temperature of the outdoor unit is detected to be between the fifth and sixth temperature thresholds, the heating device is controlled to operate at the first preset power for a second preset time and then shut off, wherein the sixth temperature threshold is below the fifth temperature threshold; or... When the chassis temperature of the outdoor unit is detected to be below the sixth temperature threshold, the heating device is controlled to operate at the second preset power for a third preset time and then shut off.

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