Split air conditioner

Abstract

The present application discloses a split-type air conditioner, comprising an indoor controller storing first user data, an outdoor controller storing second user data, a communication circuit for communication between the indoor and outdoor controllers, a relay for being controlled by the indoor controller and enabling power on and off of the outdoor controller, and sensors for detecting indoor and outdoor temperatures and the temperatures of the indoor and outdoor coils. When the communication circuit fails, the outdoor controller cannot receive operating instructions. If the communication circuit fails to recover after a period of time, the indoor controller determines whether the relationship between the indoor temperature and the operating instructions conforms to the first user data and controls the on and off of the relay accordingly. When the relay is closed, and the outdoor controller still does not receive instructions after a period of time, the outdoor controller controls the operation of various components of the outdoor unit based on the outdoor temperature and the second user data. This allows the split-type air conditioner to continue operating within a certain range of conditions even in the event of a communication circuit failure, thereby improving the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a split-type air conditioner. Background Art

[0002] Existing split-type air conditioners require a communication circuit to ensure the normal operation of the indoor and outdoor units. This circuit uses an optical coupler to convert the signals sent by the indoor / outdoor unit processor into optical signals, which are then transmitted as electrical signals via signal lines. The electrical signals are then converted into optical signals again via an optical coupler, and the indoor / outdoor unit processor receives and processes the signals. Therefore, the communication circuit plays a crucial role in the operation of the split-type air conditioner. Only by exchanging information during operation through the communication circuit can the indoor / outdoor unit processor ensure that the split-type air conditioner operates normally according to the specified requirements. If the communication circuit fails, the indoor / outdoor unit processor will be unable to receive and send communication commands normally, and the split-type air conditioner will enter a protection state and be unable to operate normally, resulting in the split-type air conditioner not functioning properly.

[0003] In related technologies, when determining the operating mode of an outdoor unit experiencing a communication loss, the relationship between the outdoor ambient temperature and the set temperature is determined to determine the appropriate action to be taken. This action is then executed in a timed, cyclical manner to maintain air conditioner operation. However, this approach fails to consider the user's instructions prior to the failure, as well as the differences in user perception and actions in different temperature ranges, which can affect user satisfaction with split-type air conditioners. Summary of the Invention

[0004] The present application provides a split-type air conditioner. When a communication circuit fails, the indoor controller uses the stored first user data to determine the relationship between the operating instruction and the current indoor temperature, and connects or disconnects the relay accordingly to adjust whether the outdoor controller is working normally; when the outdoor controller can work normally, the outdoor controller uses the stored second user data and the outdoor temperature at this time to ensure that the split air conditioner can still maintain operation when the communication is abnormal, effectively improving the user experience.

[0005] The present application provides a split-type air conditioner, comprising:

[0006] Controller, the controller includes:

[0007] An indoor controller, which is provided in the indoor unit and is used to control the operation of various components of the indoor unit, and the indoor controller stores first user data corresponding to different indoor temperatures, the first user data including: indoor temperature, outdoor temperature and corresponding operation instructions;

[0008] An outdoor controller is provided in the outdoor unit and is used to control the operation of various components of the outdoor unit. The outdoor controller stores second user data corresponding to different outdoor environments. The second user data includes: outdoor temperature and corresponding operation instructions;

[0009] Split air conditioners also include:

[0010] A communication circuit, wherein the communication circuit is connected to the mains power, the indoor controller and the outdoor controller, and the indoor controller and the outdoor controller communicate through the communication circuit to maintain the normal operation of the split-type air conditioner and update the first user data and the second user instruction data;

[0011] A relay is electrically connected to the indoor controller, one contact of the relay is connected to the mains, and the other contact of the relay is connected to the outdoor controller. The indoor controller controls whether the outdoor controller is powered on through the relay;

[0012] An indoor temperature sensor, which is used to detect the indoor temperature;

[0013] an outdoor temperature sensor, which is used to detect outdoor temperature;

[0014] The controller is configured such that, when the relay is closed and the outdoor controller is powered on, a communication circuit fails, causing the outdoor controller to be unable to receive an operating instruction, and if the communication circuit fails after a period of waiting, the indoor controller determines whether the relationship between the indoor temperature and the operating instruction meets the first user data, and controls the on / off of the relay accordingly;

[0015] When the relay is closed, if the outdoor controller still does not receive any instruction after a period of time, the outdoor controller controls the operation of various components of the outdoor unit according to the outdoor temperature and the second user data.

[0016] In some embodiments, the indoor controller determines whether the relationship between the indoor temperature and the operating instruction conforms to the stored first user data, and controls the on and off of the relay accordingly;

[0017] When the operation instruction is a cooling instruction, it is determined whether the indoor temperature reaches a first preset temperature threshold. When the indoor temperature reaches or exceeds the first preset temperature threshold, it is determined that the indoor temperature and the operation instruction meet the first user data, and the relay is kept on supplying power to the outdoor controller. Otherwise, the relay is disconnected to stop supplying power to the outdoor controller.

[0018] When the operation instruction is a heating instruction, it is determined whether the indoor temperature reaches a second preset temperature threshold. When the indoor temperature reaches below the second preset temperature threshold, it is determined that the indoor temperature and the operation instruction meet the first user data, and the relay is kept connected to continue to supply power to the outdoor controller. Otherwise, the relay is disconnected to stop supplying power to the outdoor controller.

[0019] When the operation command is the air supply command, the relay is disconnected.

[0020] In some embodiments, when the relay maintains the connected state, the outdoor controller is configured to:

[0021] If the outdoor temperature reaches above a third preset temperature threshold, the outdoor unit is controlled to enter cooling mode;

[0022] If the outdoor temperature does not reach above the third preset temperature threshold, it is determined that the outdoor temperature reaches below the fourth preset temperature threshold, and the outdoor unit is controlled to enter the heating mode.

[0023] If the outdoor temperature does not reach above the third preset temperature threshold and does not reach below the fourth preset temperature threshold, the components of the outdoor unit do not operate.

[0024] In some embodiments, the split-type air conditioner further comprises:

[0025] Indoor coil temperature sensor, which is used to detect indoor coil temperature;

[0026] An outdoor coil temperature sensor is used to detect the outdoor coil temperature;

[0027] When the outdoor temperature reaches or exceeds the third preset temperature threshold, the outdoor controller enters the cooling mode, the outdoor coil temperature is higher than the outdoor temperature, and the indoor coil temperature is lower than the indoor temperature. After the compressor runs at the first set frequency for a period of time, the indoor controller determines the indoor coil temperature and the indoor temperature.

[0028] When the indoor coil temperature is not higher than the indoor temperature, the outdoor unit is judged to operate according to the setting mode of the corresponding operation instruction and maintains the current working state;

[0029] When the indoor coil temperature is higher than the indoor temperature, it is determined that the outdoor unit is not operating in accordance with the set mode of the corresponding operation instruction, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working.

[0030] In some embodiments, in the above-mentioned cooling mode, the outdoor coil temperature sensor plays a protective role, judging the outdoor coil temperature and the first temperature protection threshold. If the outdoor coil temperature reaches above the first temperature protection threshold, the air-conditioning system is judged to be overloaded, and the outdoor controller stops the operation of the compressor.

[0031] In some embodiments, when the outdoor controller is executing the cooling mode, when the indoor temperature reaches the lower limit of the set cooling temperature range, the indoor controller disconnects the relay and the outdoor controller is powered off and stops working; when the indoor temperature does not reach the upper limit of the set cooling temperature range, the indoor controller closes the relay and the outdoor controller is powered on to continue the above working process.

[0032] In some embodiments, when the outdoor temperature reaches below a fourth preset temperature threshold, the outdoor controller enters the heating mode, the outdoor coil temperature is lower than the outdoor temperature, and the indoor coil temperature is higher than the indoor temperature. After the outdoor controller runs at the second set frequency for a period of time, the indoor controller determines the indoor coil temperature and the indoor temperature.

[0033] If the indoor coil temperature is not lower than the indoor temperature, the outdoor unit is judged to be operating according to the set mode and maintains the current operating status;

[0034] If the indoor coil temperature is lower than the indoor temperature, it is determined that the outdoor unit is not operating according to the set mode at this time, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working.

[0035] In some embodiments, the indoor pipe temperature and the second temperature protection threshold are judged. When the indoor pipe temperature reaches above the second temperature protection threshold, the air conditioning system is judged to be overloaded, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working.

[0036] In some embodiments, when the outdoor controller is executing the cooling mode, when the indoor temperature reaches the upper limit of the set heating temperature range, the indoor controller disconnects the relay and the outdoor controller is powered off and stops working; when the indoor temperature does not reach the lower limit of the set heating temperature range, the indoor controller maintains the relay connection, and the outdoor controller is powered on and continues to work.

[0037] In some embodiments, when the indoor controller receives an operation instruction, the relay is connected, and the indoor controller sends the operation instruction information to the outdoor controller through the communication circuit. The outdoor controller receives the operation instruction information and the outdoor temperature at this time and stores them in the data storage unit of the outdoor controller. The outdoor controller sends the above information to the indoor controller. The indoor controller receives the above information and the indoor temperature at this time and stores them in the data storage unit of the indoor controller. After a period of work, the first user data and the second user data of the user at different ambient temperatures are obtained.

[0038] In the above embodiment, a split-type air conditioner includes an indoor controller, an outdoor controller, a communication circuit for maintaining communication between the indoor controller and the outdoor controller, a relay for controlling whether the outdoor controller is powered on, an indoor coil temperature sensor for detecting the indoor coil temperature, an indoor temperature sensor for detecting the indoor temperature, an outdoor coil temperature sensor for detecting the outdoor coil temperature, and an outdoor temperature sensor for detecting the outdoor temperature. The above structure can maintain the normal operation of the split-type air conditioner when a communication circuit fails. Specifically, after the relay is closed and the outdoor controller is powered on, when a communication circuit fails, the outdoor controller cannot receive an operating instruction. If the communication circuit fails after waiting for a period of time and still not restored, the indoor controller determines whether the relationship between the indoor temperature and the operating instruction at this time is consistent with the stored first user data, and uses this to determine the on and off of the relay; when the relay is closed, the outdoor controller still does not receive the operating instruction after waiting for a period of time, and controls the operation of various components of the outdoor unit according to the outdoor temperature and the second user data. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 shows a schematic structural diagram of a split-type air conditioner according to some embodiments;

[0040] Figure 2 shows a circuit structure diagram of a communication circuit according to some embodiments;

[0041] Figure 3 shows a schematic diagram of a connection method of a relay according to some embodiments;

[0042] Figure 4 shows the refrigerant flow direction of the air-conditioning system in cooling mode according to some embodiments;

[0043] Figure 5 shows the refrigerant flow direction of the air conditioning system in heating mode according to some embodiments;

[0044] Figure 6 A flowchart illustrating a split-type air conditioner operation when a communication circuit fails according to some embodiments is shown;

[0045] Figure 7 A flowchart illustrating how the indoor controller determines whether the relationship between the indoor temperature and the operating instruction complies with first user data according to some embodiments;

[0046] Figure 8 A flow chart illustrating a method for operating an outdoor controller after the indoor controller maintains a relay in a connected state according to some embodiments;

[0047] Figure 9 shows a working flow diagram after the outdoor unit enters the cooling mode according to some embodiments;

[0048] Figure 10 shows a working flow diagram after the outdoor unit enters the heating mode according to some embodiments;

[0049] The above attached pictures:

[0050] Indoor unit 100; outdoor unit 200; control device 300; indoor controller 1; outdoor controller 2;

[0051] Evaporator 11; indoor fan 12; indoor fan motor; indoor unit air outlet 14;

[0052] Indoor temperature sensor 15; Indoor coil temperature sensor 16;

[0053] Compressor 21; four-way valve 22; throttling device 23; condenser 24; outdoor fan 25;

[0054] Outdoor fan motor 26; outdoor unit air outlet 27; outdoor temperature sensor 28;

[0055] Outdoor coil temperature sensor 29; communication circuit 4; relay 5;

[0056] A first data storage unit 10 ; and a second data storage unit 20 . DETAILED DESCRIPTION

[0057] In order to make the purpose and implementation of this application clearer, the exemplary implementation of this application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only part of the embodiments of this application, not all of the embodiments.

[0058] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0059] In the specification and claims of this application and the accompanying drawings, the terms "first," "second," "third," etc. are used to distinguish similar or similar objects or entities, and are not necessarily intended to limit a particular order or sequence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable under appropriate circumstances.

[0060] The terms "comprise," "include," and "have," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0061] This embodiment provides an air conditioner that performs a cooling and heating cycle using a compressor 21, a condenser 24, an expansion valve, and an evaporator 11. The cooling and heating cycles involve compression, condensation, expansion, and evaporation. The refrigerant absorbs and releases heat to provide cooling or heating to the indoor space, thereby regulating the indoor temperature.

[0062] Compressor 21 compresses the refrigerant into high-temperature, high-pressure gas and discharges the compressed gas. The discharged refrigerant gas flows into condenser 24. Condenser 24 condenses the compressed, high-temperature, high-pressure gaseous refrigerant into liquid refrigerant, releasing heat into the surrounding environment during the condensation process.

[0063] The liquid refrigerant flowing out of condenser 24 enters the expansion valve, which expands the high-temperature, high-pressure liquid refrigerant condensed in condenser 24 into a low-pressure liquid refrigerant. The low-pressure liquid refrigerant flowing out of the expansion valve enters evaporator 11. As it passes through evaporator 11, it absorbs heat and evaporates into a low-temperature, low-pressure refrigerant gas. This low-temperature, low-pressure refrigerant gas is then returned to compressor 21. Evaporator 11 achieves a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material being cooled. Throughout this cycle, the air conditioner can regulate the temperature of the indoor space.

[0064] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including the compressor 21 and the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve may be provided in the indoor unit or the outdoor unit.

[0065] The indoor heat exchanger and the outdoor heat exchanger can function as the condenser 24 or the evaporator 11. When the indoor heat exchanger functions as the condenser 24, the air conditioner functions as a heater in heating mode, and when the indoor heat exchanger functions as the evaporator 11, the air conditioner functions as a cooler in cooling mode.

[0066] Reference Figure 1 This application specifically proposes a split-type air conditioner, which includes a control device 300, an indoor unit 100, and an outdoor unit 200. A split-type air conditioner is an air conditioner in which the indoor unit 100 is installed indoors and the outdoor unit 200 is installed outdoors, connected in between by pipes and wires. Each indoor unit 100 of the split-type air conditioner corresponds to one outdoor unit 200. The split-type air conditioner is in contrast to the integral air conditioner, which is an all-in-one unit without indoor and outdoor units. The control device 300 is used by the user to issue operating instructions to control the operation of the indoor unit 100 and the outdoor unit 200. Exemplarily, the control device 300 is configured as a remote control.

[0067] The split air conditioner also includes a controller, which can be located in different split devices. In this application, the controller includes an indoor controller 1 and an outdoor controller 2, which are located in the indoor unit 100 and the outdoor unit 200 respectively.

[0068] In some embodiments, the above-mentioned controllers may include a central processing unit (CPU) and at least one of a memory, RAM Random Access Memory (RAM), ROM (Read-Only Memory, ROM), a first interface to an nth interface for input / output, a communication bus, etc.

[0069] Among them, the indoor unit 100 further includes an indoor unit shell, which includes an indoor controller 1, an evaporator 11, an indoor fan 12, and an indoor fan motor 13. When the indoor fan motor 13 is working, the indoor fan motor 13 drives the indoor fan 12 to rotate, and uses negative pressure to suck the indoor air from the indoor air inlet into the indoor unit shell, and after heat exchange through the evaporator 11, it flows out from the indoor unit outlet 14.

[0070] In order to further detect the working status of the indoor unit 100 and the indoor environmental parameters, the indoor unit 100 also includes an indoor temperature sensor 15 and an indoor coil temperature sensor 16. The indoor temperature sensor 15 is used to detect the indoor temperature, and the indoor coil temperature sensor 16 is used to detect the indoor coil temperature, that is, the temperature of the heat exchange tube. By judging the indoor temperature and the indoor coil temperature, the user's set working mode at this time can be obtained. The indoor controller 1 detects the temperature information of the indoor coil temperature sensor 16 and the indoor temperature sensor 15, controls the operation of the indoor fan 12, and communicates with the outdoor controller 2.

[0071] The indoor controller 1 controls the operation of the indoor unit 100 and responds to user operations using various software control programs stored in its memory. The controller controls the overall operation of the indoor unit 100. For example, in response to a user instruction to select an object on the control device 300, the indoor unit 100 can perform an operation related to the object selected by the user instruction.

[0072] The outdoor unit 200 further includes an outdoor unit housing, which includes an outdoor controller 2, a compressor 21, a four-way valve 22, a throttling device 23, a condenser 24, an outdoor fan 25, an outdoor fan motor 26 and an outdoor unit air outlet 27. In order to further detect the working status of the outdoor unit 200 and the outdoor environmental parameters, the outdoor unit 200 also includes an outdoor temperature sensor 28 and an outdoor coil temperature sensor 29. The outdoor temperature sensor 28 detects the outdoor temperature, and the outdoor coil temperature sensor 29 detects the outdoor coil temperature. The controller controls the operation of the compressor 21, the four-way valve 22 and the outdoor fan motor 26 by detecting the outdoor coil temperature sensor 29 and the outdoor temperature sensor 28, and communicates with the indoor controller 1.

[0073] The outdoor controller 2 controls the operation of the outdoor unit 200 and responds to user operations using various software control programs stored in its memory. The controller controls the overall operation of the outdoor unit 200. For example, in response to a user command received from the indoor controller 1, the indoor unit 100 can perform an operation related to the object selected by the user.

[0074] It should be noted that the compressor 21, four-way valve 22, throttling device 23, and condenser are connected by copper pipes, which are filled with refrigerant. The outdoor fan motor 26 drives the outdoor fan 25 to generate airflow for heat exchange. The heat exchange devices of the indoor unit 100 and the outdoor unit 200 are connected by indoor and outdoor connecting pipes.

[0075] At the same time, since the indoor unit 100 controller and the outdoor unit 200 controller are located indoors and outdoors respectively, in order to cooperate with the indoor controller 1 and the outdoor controller 2 to control the operation of related electrical components, and to achieve the best working effect (for example, cooling effect, heating effect and air supply effect) during the working process, the indoor controller 1 and the outdoor controller 2 need to communicate to exchange working status information.

[0076] In order to meet the communication requirements, in addition to the live wire L for power supply, the neutral wire N and the bottom wire GND for grounding protection, a communication line SI is also provided between the indoor unit 100 and the outdoor unit 200. The communication line SI cooperates with the relevant communication circuit 4 to complete the communication work between the indoor controller 1 and the outdoor controller 2.

[0077] Reference Figure 2 , illustrating a structural diagram of the communication circuit 4 in some embodiments of the present application.

[0078] The live wire L of the power supply is input to the indoor access terminal X1, and the neutral wire N of the power supply is input to the indoor access terminal X2. The voltage is reduced and the current is limited by the first resistor R1. The diode V1 and the diode V2 form a half-wave rectifier circuit to rectify the input AC power into DC power. The capacitor C1 plays a role in smoothing, filtering and energy storage. The voltage regulator diode VZ1 realizes stable voltage clamping. For example, the voltage regulator diode VZ1 is usually a 24V voltage regulator diode.

[0079] The communication circuit 4 includes a communication line SI, an optocoupler B1, an optocoupler B2, an optocoupler B4, and an optocoupler B5, wherein the optocoupler plays the role of signal transmission and electrical isolation, the optocoupler B1 is the indoor communication signal transmitting end, the optocoupler B2 is the indoor communication signal receiving end, the optocoupler B4 is the outdoor communication signal receiving end, and the optocoupler B5 is the outdoor communication signal transmitting end.

[0080] Typically, to ensure reliable transmission of communication signals, the transmitter must remain in a normally-on state after sending a signal to ensure the entire communication loop is conductive, allowing the receiver to reliably receive the signal. For example, when optocoupler B1 on the indoor communication signal transmitter sends a signal, optocoupler B5 on the indoor communication signal transmitter is in a normally-on state; and when optocoupler B5 on the outdoor communication signal transmitter sends a signal, optocoupler B1 on the indoor communication signal transmitter is in a normally-on state.

[0081] Diodes V5 and V6 provide unidirectional isolation protection, preventing abnormally high voltage from damaging communication circuit 4 due to incorrect wiring during installation of the split-type air conditioner. For example, if the power supply live wire L is mistakenly connected to the indoor communication line SI, the presence of diode V5 prevents reverse current flow through V5, thus protecting optocoupler B2 from damage.

[0082] When an abnormally high current flows, PTC resistors RT1 and RT2 rapidly heat up, increasing their resistance and quickly reducing the current. By providing these resistors, the split-type air conditioner effectively prevents abnormally high currents from damaging communication circuit 4 due to incorrect wiring during installation. For example, if the power supply live wire L is mistakenly connected to the outdoor communication line SI, the presence of PTC resistor RT2 will rapidly heat up and increase its resistance, quickly reducing the current and protecting diode V6 from damage.

[0083] As can be seen from the above, communication circuit 4 plays a crucial role in the operation of a split-type air conditioner. Only by exchanging operational information through communication circuit 4 can the indoor and outdoor controllers ensure that the split-type air conditioner operates normally according to the set operating mode corresponding to the operating instructions. If communication circuit 4 malfunctions, the indoor or outdoor controller 2 will be unable to properly receive and send communication commands, causing the air conditioner to enter a protection mode and become inoperable. For example, outdoor controller 2 will not know whether the current operating instruction is cooling or heating, and thus will be unable to properly control the opening and closing of four-way valve 22. However, communication circuit 4 is composed of numerous electronic components, and any malfunction in any of these components can cause the split-type air conditioner to malfunction. Malfunctions in communication circuit 4 are common in split-type air conditioners.

[0084] The communication circuit 4 in the present application can also be replaced by a communicator, which is a component used to implement communication between the indoor controller 1 and the outdoor controller 2 according to various communication protocol types. For example, the communicator may include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chip or a near-field communication protocol chip, as well as an infrared receiver. The present application can also solve the problem of normal operation of the indoor controller 1 and the outdoor controller 2 when the above-mentioned communicator fails.

[0085] Reference Figure 3 , illustrating the connection method of the relay 5 in some embodiments of the present application. The AC power input live wire L, neutral wire N, and safety ground wire GND are respectively connected to the indoor controller 1. The neutral wire N is also directly connected to the outdoor controller 2 via the 2N terminal block, and the ground wire GND is also directly connected to the GND terminal of the outdoor controller 2 via the GND terminal block. After entering the indoor controller 1, the live wire L is also connected to a contact of the relay 5 controlled by the indoor controller 1. The other end of the relay 5 contact is connected to the 1L terminal block of the outdoor controller 2 via the 1L terminal block. In other words, only when the indoor controller 1 controls the relay 5 to be closed will the power be transmitted to the outdoor controller 2 through the relay 5.

[0086] By providing the relay 5 , the power supply to the outdoor controller 2 can be independently controlled to control the working state of the outdoor controller 2 and adapt to the operation of the split-type air conditioner when the communication circuit 4 fails.

[0087] In addition, there is a communication line connected from the indoor controller 1 to the 3SI of the terminal block and then to the 3SI of the terminal block of the outdoor controller 2. The communication line cooperates with the relevant communication circuit 4 to complete the communication work of the indoor and outdoor controllers.

[0088] In standby mode, the indoor controller 1 disconnects the relay 5 that supplies power to the outdoor controller 2, and the outdoor controller 2 cannot work without power supply; when the communication circuit 4 is normal, the relay 5 is connected, and after the split-type air conditioner receives the power-on command, it will start working according to the working mode corresponding to the received operating command.

[0089] Reference Figure 4 When the split air conditioner is in cooling mode, the indoor controller 1 closes the relay 5 that supplies power to the outdoor controller 2. The outdoor controller 2 is powered on, and the indoor / outdoor fan motor and the compressor 21 are both in operation. The four-way valve 22 does not work. At this time, the high-temperature refrigerant compressed by the compressor 21 enters the four-way valve 22 and then enters the condenser 24, causing the temperature of the condenser 24 (outdoor coil temperature) to rise. Usually, this temperature is significantly higher than the outdoor temperature. Under the action of the outdoor fan, the outdoor ambient air flows through the condenser 24 and is blown out of the outdoor unit 200 from the fan cover of the outdoor unit 200. The condenser 24 The heat in the air is removed by the airflow, lowering the refrigerant temperature. The refrigerant then enters the throttling device 23 of the outdoor unit 200. After the refrigerant pressure is reduced by the throttling device 23, the refrigerant temperature is further reduced. The refrigerant then flows through the indoor-outdoor connecting pipe to the indoor unit 100 and into the evaporator 11. At this point, the temperature on the evaporator 11 (i.e., the indoor disk-sensing temperature) is typically significantly lower than the indoor temperature. The indoor fan motor 13 operates, and the indoor air passes through the evaporator 11. The heat in the air is absorbed by the evaporator 11 and then blown out of the indoor unit outlet 14, blowing the heat-exchanged cool air into the indoor environment, lowering the indoor room temperature. After transferring heat through the evaporator 11, the refrigerant returns to the outdoor unit 200 through the indoor-outdoor connecting pipe, and then returns to the compressor 21 for compression. This cycle repeats, continuously transferring heat from the indoor environment to the outside.

[0090] like Figure 5As shown, when the split air conditioner operates in heating mode, the indoor controller 1 closes the relay 5 that supplies power to the outdoor controller 2, the outdoor controller 2 is powered on, the indoor / outdoor fan motors and the compressor 21 are all in operation, the four-way valve 22 is powered on, and the high-temperature refrigerant compressed by the compressor 21 enters the four-way valve 22, and then enters the indoor and outdoor connecting pipes to reach the indoor unit 100. The heat is transferred to the evaporator 11. At this time, the temperature on the evaporator 11 (indoor disk-sensing temperature) is usually significantly higher than the indoor temperature. Through the operation of the indoor fan motor 13, the indoor air passes through the evaporator 11, takes away the heat on the evaporator 11, and is blown out of the indoor unit outlet 14, transferring the heat to the indoor environment, thereby increasing the indoor room temperature. After the refrigerant flows through the evaporator 11 for heat transfer, it returns to the outdoor unit 200 through the indoor and outdoor connecting pipe and enters the throttling device 23 of the outdoor unit 200. After the refrigerant pressure is reduced by the throttling device 23, the refrigerant temperature is further reduced, and its temperature is generally much lower than the outdoor temperature; then, the refrigerant enters the condenser 24, which reduces the temperature of the condenser 24 (outdoor coil temperature), which is usually significantly lower than the outdoor temperature. Under the action of the outdoor fan 25, the outdoor ambient air flow passes through the condenser 24 and is blown out of the outdoor unit 200 from the outdoor fan 25 cover. The condenser 24 absorbs heat in the air flow to increase the refrigerant temperature, and then the refrigerant enters the four-way valve 22 and returns to the compressor 21 for compression. This cycle continues, thereby continuously absorbing heat in the outdoor environment and transmitting it to the indoor unit 100.

[0091] When the air conditioner is running in the air supply mode, the indoor controller 1 does not close the relay 5 that supplies power to the outdoor controller 2, and the outdoor controller 2 does not work. At this time, only the indoor fan motor 13 enters the operating state, and only the air flow circulation in the indoor environment is performed.

[0092] In some embodiments of the present application, when there is no failure in the communication circuit 4 and the indoor controller 1 and the outdoor controller 2 can communicate normally, when the indoor controller 1 receives an operation instruction, the indoor controller 1 controls the relay 5 to be connected and the outdoor controller 2 is powered on and operates.

[0093] At this time, the indoor controller 1 sends the operation instruction to the outdoor controller 2 through the communication circuit 4. The outdoor controller 2 receives the operation instruction and the outdoor temperature at this time and stores them in the first data storage unit 10 of the outdoor controller 2. The outdoor controller 2 sends the above information to the indoor controller 1. The indoor controller 1 receives the above information and the indoor temperature at this time and stores them in the second data storage unit 20 of the indoor controller 1. After a period of work, the first user data and the second user data reflecting the user's usage habits are obtained.

[0094] It should be noted that the first user data includes at least the indoor temperature, the outdoor temperature and the corresponding operating instructions; the second user data includes at least the outdoor temperature and the corresponding operating instructions.

[0095] Specifically, during the normal operation of the communication circuit 4, the indoor controller 1 uses the communication circuit 4 to send the operating instructions (operating mode, exemplarily, cooling mode and heating mode) received from the control device 300 to the outdoor controller 2. Each time the outdoor controller 2 receives the operating instruction, it will record the current outdoor temperature detected by the outdoor temperature sensor 28 and the information of the operating mode issued by the user (i.e., the second user data) in the first data storage unit 10 of the outdoor controller 2. Subsequently, the outdoor controller 2 will send the stored information to the indoor controller 1. The indoor controller 1 will store the received second user data and the indoor temperature detected by the current indoor temperature sensor 15 (i.e., the first user data) in the second data storage unit 20 of the indoor controller 1. After a certain number of accumulations, data collection of the user's behavioral habits of using the distributed air conditioner for cooling or heating under different ambient temperatures will be obtained. For example, in a user's home, when the indoor temperature and outdoor temperature are higher than 26°C, the split air conditioner's normal working mode is cooling mode; when the outdoor temperature and indoor temperature are between 20 and 26°C, the split air conditioner's normal working mode is air supply mode; when the indoor temperature and outdoor temperature are lower than 20°C, the split air conditioner's normal working mode is heating mode.

[0096] It should be noted that users can also set operating modes at different temperatures when using the split air conditioner for the first time. When the split air conditioner has learned less user behavior data and the judgment cannot fully reflect the user's behavior habits, the stored operating modes at different temperatures can be used to provide a reference for the operation of the split air conditioner when the communication circuit 4 fails.

[0097] In some embodiments of the present application, during the working process of the communication circuit 4, the first user data and the second user data are continuously updated according to the operating instructions, indoor temperature and outdoor temperature issued by the current user to better reflect the user's behavioral habits. When the communication circuit 4 fails, the working mode of the outdoor unit 200 is selected.

[0098] In some embodiments of the present application, when the communication circuit 4 operates normally, the split-type air conditioner normally executes the cooling mode, the heating mode, and the air supply mode according to the operation instruction.

[0099] In some embodiments of the present application, in order to solve the problem that the indoor and outdoor units cannot exchange operating information due to a failure of the communication circuit 4 during the operation of the split air conditioner, thereby causing the indoor and outdoor units to fail to operate normally, Figure 6 , in this application the controller is configured as:

[0100] When the relay 5 is closed, the outdoor controller 2 is powered on (step S1 ), and it is determined whether a fault occurs in the communication circuit 4 (step S2 ).

[0101] If communication circuit 4 is determined to be faulty in step S2, outdoor controller 2 is unable to receive the operating instruction. Step S31 is first executed. After waiting for a first set time, step S32 is executed, where indoor controller 1 determines whether the relationship between the indoor temperature and the operating instruction at this time meets the first user data. For example, the first set time is 1 minute.

[0102] When it is determined in step S32 that the relationship between the indoor temperature and the operation instruction does not conform to the first user data, the relay 5 is disconnected (step S51);

[0103] When it is determined in step S32 that the relationship between the indoor temperature and the operating instruction conforms to the first user data, the relay 5 is closed (step S52), and then step S6 is executed. After waiting for the second set time, it is determined whether the outdoor controller 2 still has not received the instruction; illustratively, the second set time is 2 minutes.

[0104] When it is determined in step S6 that the outdoor controller 2 receives the operation instruction, the normal operation mode (step S4) is continued.

[0105] When it is determined in step S6 that the outdoor controller 2 has not received the operation instruction, step S7 is executed, and the outdoor controller 2 controls the operation of various components of the outdoor unit 200 according to the outdoor temperature and the second user data.

[0106] When it is determined in step S2 that the communication circuit 4 has not failed, the normal operation mode is continued (step S4 ).

[0107] Through the above steps, based on the first user data and the second user data, the operating conditions of the indoor controller 1 and the outdoor controller 2 at different ambient temperatures are obtained, and then the on-off condition of the relay 5 and the working status of each component of the outdoor unit 200 are judged according to the operating instructions issued by the user received by the indoor controller 1 and the detected indoor temperature and outdoor temperature. This allows the split air conditioner to continue to operate within a certain range of conditions when the communication circuit 4 is abnormal, thereby effectively improving the user experience.

[0108] In some embodiments of the present application, the indoor controller 1 determines whether the relationship between the indoor temperature and the operating instruction conforms to the stored first user data, and controls the on and off of the relay 5 accordingly;

[0109] When the operation instruction is a cooling instruction, it is determined whether the indoor temperature reaches a first preset temperature threshold. When the indoor temperature reaches or exceeds the first preset temperature threshold, it is determined that the indoor temperature and the operation instruction meet the first user data, the relay 5 is connected, and the outdoor controller 2 is powered on. Otherwise, the relay 5 is disconnected and the power supply to the outdoor controller 2 is stopped.

[0110] When the operation instruction is a heating instruction, it is determined whether the indoor temperature reaches a second preset temperature threshold. When the indoor temperature reaches below the second preset temperature threshold, it is determined that the indoor temperature and the operation instruction meet the first user data, and the relay 5 is kept connected to continue to supply power to the outdoor controller 2. Otherwise, the relay 5 is disconnected to stop supplying power to the outdoor controller 2.

[0111] When the operation command is an air supply command, relay 5 is disconnected.

[0112] Specifically, refer to Figure 7 , which explains how the indoor controller 1 determines whether the relationship between the indoor temperature and the operating instruction conforms to the first user data.

[0113] First, it is determined whether the mode corresponding to the operation instruction is the cooling mode (step S701). If it is determined to be the cooling mode, step S702 is executed to determine whether the indoor temperature reaches or exceeds a first preset temperature threshold.

[0114] When it is determined in step S702 that the indoor temperature reaches above the first preset temperature threshold, step S703 is executed to determine whether the indoor temperature and the operating instruction at this time meet the first user data, and the relay 5 is kept connected; when it is determined in step S702 that the indoor temperature does not reach above the first preset temperature threshold, step S704 is executed to disconnect the relay 5 and stop supplying power to the outdoor controller 2.

[0115] If it is determined in step S701 that the mode corresponding to the operation instruction is not the cooling mode, step S705 is executed to determine whether the mode corresponding to the operation instruction is the heating mode. If it is determined to be the heating mode, step S706 is executed to determine whether the indoor temperature reaches or falls below a second preset temperature threshold.

[0116] When it is determined in step S706 that the indoor temperature reaches below the second preset temperature threshold, step S707 is executed to determine whether the indoor temperature and the operation instruction at this time meet the first user data, and the relay 5 is kept connected; when it is determined in step S706 that the indoor temperature does not reach below the second preset temperature threshold, step S708 is executed to disconnect the relay 5 and stop supplying power to the outdoor controller 2.

[0117] When it is determined in step S705 that the mode corresponding to the operation instruction is not the heating mode, step S709 is executed to determine whether the mode corresponding to the operation instruction is the air supply mode. When the determination is yes, step S710 is executed to disconnect the relay 5.

[0118] Exemplarily, the first preset temperature threshold is 26°C, and the second preset temperature threshold is 20°C.

[0119] It should be noted that, in the event of a failure of the communication circuit 4 , in order to ensure the best heat exchange effect during operation, the indoor controller 1 controls the indoor fan motor 13 to operate at the highest frequency in both the cooling mode and the heating mode.

[0120] In some embodiments of the present application, when the relay 5 maintains the connected state, the outdoor controller 2 is configured to:

[0121] If the outdoor temperature reaches or exceeds a third preset temperature threshold, the outdoor unit 200 is controlled to enter a cooling mode;

[0122] If the outdoor temperature does not reach above the third preset temperature threshold, it is determined that the outdoor temperature reaches below the fourth preset temperature threshold, and the outdoor unit 200 is controlled to enter the heating mode.

[0123] If the outdoor temperature does not reach or exceed the third preset temperature threshold and does not reach or exceed the fourth preset temperature threshold, the components of the outdoor unit 200 do not operate.

[0124] When the outdoor controller 2 is in a working state, but due to a failure in the communication circuit 4, it is unable to receive the operating instructions issued by the user in a timely manner, the outdoor controller 2 can first make the outdoor unit 200 work based on the relationship between the outdoor temperature and the operating mode in the second user data to maintain the operation of the split air conditioner, and then detect whether the judgment is incorrect based on subsequent methods.

[0125] Specifically, refer to Figure 8 , which illustrates the working process of the outdoor controller 2 after the indoor controller 1 maintains the relay 5 in the connected state.

[0126] The outdoor controller 2 receives the outdoor temperature detected by the outdoor temperature sensor 28 (step S801 ), and determines whether the outdoor temperature reaches or exceeds a third preset temperature threshold (step S802 );

[0127] If it is determined in step S802 that the outdoor temperature reaches or exceeds the third preset temperature threshold, step S803 is executed, and the outdoor unit 200 enters the cooling mode; if it is determined in step S802 that the outdoor temperature does not reach or exceed the third preset temperature threshold, step S804 is executed to determine whether the outdoor temperature reaches or falls below the fourth preset temperature threshold;

[0128] When it is determined in step S804 that the outdoor temperature has not reached below the fourth preset temperature threshold, step S805 is executed and the components of the outdoor unit 200 do not work; when it is determined in step S804 that the outdoor temperature has reached below the fourth preset temperature threshold, step S806 is executed and the outdoor unit 200 enters the heating mode.

[0129] In some embodiments of the present application, reference is made to Figure 9 , which describes the working status of each component after the outdoor unit 200 enters the cooling mode.

[0130] When the outdoor temperature reaches or exceeds the third preset temperature threshold, the outdoor controller 2 enters the cooling mode, the outdoor coil temperature is higher than the outdoor temperature, and the indoor coil temperature is lower than the indoor temperature. After the compressor 21 runs at the first set frequency for a period of time (step S901), step S902 is executed to determine whether the indoor coil temperature is higher than the indoor temperature.

[0131] If it is determined in step S902 that the indoor coil temperature is higher than the indoor temperature, step S903 is executed to determine that the outdoor unit 200 is not operating in the set mode of the corresponding operation instruction. The indoor controller 1 disconnects the relay 5 and the outdoor controller 2 is powered off and stops operating.

[0132] When it is determined in step S902 that the indoor coil temperature is not higher than the indoor temperature, step 904 is executed to determine whether the outdoor unit 200 is operating according to the setting mode of the corresponding operation instruction and maintains the current working state.

[0133] Through the above settings, based on the relationship between the indoor coil temperature and the indoor temperature when the outdoor unit 200 is in cooling mode, it is determined whether the working modes of the indoor unit 100 and the outdoor unit 200 are consistent, so that the working mode of the split air conditioner is the set working mode, thereby meeting the user's mode requirements.

[0134] It should be noted that in order to avoid overload operation of the air-conditioning system, the first set frequency is generally set to be lower than the rated frequency. For example, when the rated operating frequency of the compressor 21 is 60Hz, the first set frequency set at this time can be 50Hz, and of course it can also be other values lower than 60Hz.

[0135] The compressor 21 operates at the first set frequency for a period of time, which may be a third set time. For example, the third set time is 3 minutes.

[0136] In some embodiments of the present application, the outdoor coil temperature and a first temperature protection threshold are determined. If the outdoor coil temperature reaches or exceeds the first temperature protection threshold, the air conditioning system is determined to be overloaded, and the outdoor controller 2 stops the operation of the compressor 21. For example, the first temperature protection threshold is set to 60°C.

[0137] During the cooling mode, the outdoor coil temperature sensor 29 plays a protective role, preventing the air conditioning system from being overloaded and damaging the split-type air conditioner during operation.

[0138] In some embodiments of the present application, when the outdoor controller 2 executes the cooling mode, when the indoor temperature reaches the lower limit of the set cooling temperature range, the indoor controller 1 disconnects the relay 5, and the outdoor controller 2 is powered on and stops working; when the indoor temperature does not reach the upper limit of the set cooling temperature range, the indoor controller 1 closes the relay 5, and the outdoor controller 2 is powered on to continue the above working process.

[0139] It should be noted that the set cooling temperature range is a temperature interval formed by a certain range of upward and downward fluctuations according to the temperature value set by the user.

[0140] When outdoor controller 2 determines that the current mode is cooling mode, indoor controller 1 determines whether the user's needs have been met by checking whether the indoor temperature has reached the set cooling temperature range, and controls the operating state of relay 5 accordingly. Specifically, in cooling mode, if the indoor temperature is 1°C below the user-set temperature, it is determined that the preset cooling effect has been achieved. To prevent over-cooling, indoor controller 1 disconnects relay 5, and outdoor controller 2 is powered off and stops operating. If the indoor temperature is more than 1°C above the set temperature, it is determined that the preset cooling effect has not been achieved and further cooling is required. Indoor controller 1 keeps relay 5 closed, and outdoor controller 2 is powered on to continue the cooling mode process.

[0141] In some embodiments of the present application, reference is made to Figure 10 , which describes the working status of each component after the outdoor unit 200 enters the heating mode.

[0142] When the outdoor temperature reaches below the fourth preset temperature threshold, the outdoor unit 200 enters the heating mode, the outdoor coil temperature is lower than the outdoor temperature, and the indoor coil temperature is higher than the indoor temperature. The compressor 21 operates at the second set frequency for a period of time (step S1001), and step S1002 is executed to determine whether the indoor coil temperature is lower than the indoor temperature.

[0143] If it is determined in step S1002 that the indoor coil temperature is lower than the indoor temperature, step S1003 is executed to determine that the outdoor unit 200 is not operating in the set mode of the corresponding operation instruction, the indoor controller 1 disconnects the relay 5, and the outdoor controller 2 is powered off and stops working;

[0144] When it is determined in step S1002 that the indoor coil temperature is not lower than the indoor temperature, step 1004 is executed to determine whether the outdoor unit 200 is operating according to the setting mode of the corresponding operation instruction and maintain the current working state.

[0145] Through the above settings, the relationship between the indoor coil temperature and the indoor temperature in the heating mode is used to determine whether the working modes of the indoor unit 100 and the outdoor unit 200 are consistent, so that the working mode of the split air conditioner is the set working mode, thereby meeting the user's mode requirements.

[0146] It should be noted that, similarly, in order to avoid overload operation of the air-conditioning system, the second set frequency is generally set to be lower than the rated frequency. For example, when the rated operating frequency of the compressor 21 is 70 Hz, the second set frequency set at this time can be 60 Hz, and of course it can also be other values lower than 70 Hz.

[0147] The compressor 21 operates at the second set frequency for a period of time, which may be a fourth set time. For example, the fourth set time is 3 minutes.

[0148] In some embodiments of the present application, the indoor pipe temperature and a second temperature protection threshold are determined. When the indoor pipe temperature reaches or exceeds the second temperature protection threshold, the air conditioning system is determined to be overloaded, indoor controller 1 disconnects relay 5, and outdoor controller 2 is powered off and stops operating. For example, the second temperature protection threshold is set to 60°C.

[0149] During the above-mentioned heating mode, the indoor coil temperature sensor 16 plays a protective role. By judging the relationship between the indoor pipe temperature and the set second temperature protection threshold, the current working condition of the air-conditioning system is judged. When the second temperature protection threshold is exceeded, it means that the air-conditioning system is overloaded and needs to stop the current operation to prevent the air-conditioning system from being overloaded during operation and damaging the split air conditioner.

[0150] In some embodiments of the present application, when the outdoor controller 2 executes the heating mode, when the indoor temperature reaches the upper limit of the set heating temperature range, the indoor controller 1 disconnects the relay 5, and the outdoor controller 2 is powered on and stops working; when the indoor temperature does not reach the lower limit of the set heating temperature range, the indoor controller 1 maintains the relay 5 connected, and the outdoor controller 2 is powered on and continues to work.

[0151] It should be noted that the set heating temperature range is a temperature interval formed by a certain range of upward and downward fluctuations according to the temperature value set by the user.

[0152] Specifically, when outdoor controller 2 determines that the current mode is heating mode, indoor controller 1 determines whether the user's needs have been met by checking whether the indoor temperature has reached the set heating temperature range, and controls the operating state of relay 5 accordingly. Specifically, in heating mode, if the indoor temperature is 1°C higher than the user-set temperature, it is determined that the preset heating effect has been achieved. To prevent overheating, indoor controller 1 disconnects relay 5, and outdoor controller 2 is powered off and stops operating. If the indoor temperature is more than 1°C lower than the set temperature, it is determined that the set heating effect has not been achieved and continued heating is required. Indoor controller 1 keeps relay 5 closed, and outdoor controller 2 is powered on to continue the heating mode.

[0153] A split-type air conditioner is also provided in an embodiment of the present application, including: an indoor controller 1 arranged in an indoor unit 100, an outdoor controller 2 arranged in an outdoor unit 200, a communication circuit 4 for providing communication between the indoor controller 1 and the outdoor controller 2, a relay 5 for being controlled by the indoor controller 1 and realizing power on and off of the outdoor controller 2, an indoor coil temperature sensor 16 for detecting the indoor coil temperature, an indoor temperature sensor 15 for detecting the indoor temperature, an outdoor coil temperature sensor 29 for detecting the outdoor coil temperature, and an outdoor temperature sensor 28 for detecting the outdoor temperature, wherein the indoor controller 1 stores first user data corresponding to different indoor temperatures, the first user data including: indoor temperature, outdoor temperature, and corresponding operating instructions; the outdoor controller 2 stores second user data corresponding to different outdoor environments, the second user data including: outdoor temperature and corresponding operating instructions.

[0154] In the above embodiment, a control method for a split-type air conditioner is provided. In this method, the indoor controller 1 and the outdoor controller 2 are based on the operating instructions received by the indoor controller 1, the indoor coil temperature, the indoor temperature, the outdoor coil temperature and the outdoor temperature received by the outdoor controller 2, combined with the first user data and the second user data. In the event of a failure of the communication circuit 4, the split-type air conditioner can continue to operate to a certain extent. At the same time, the operating mode is consistent with the user's operating instructions and past behavioral habits, which greatly improves user satisfaction.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0156] For ease of explanation, the above description has been presented in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A split-type air conditioner, characterized in that: include: A controller, the controller comprising: an indoor controller, which is provided in the indoor unit and is used to control the operation of various components of the indoor unit, wherein the indoor controller stores first user data corresponding to different indoor temperatures, the first user data including at least the indoor temperature, the outdoor temperature, and corresponding operation instructions; an outdoor controller, which is provided in the outdoor unit and is used to control the operation of various components of the outdoor unit, wherein the outdoor controller stores second user data corresponding to different outdoor environments, wherein the second user data at least includes an outdoor temperature and a corresponding operation instruction; The split-type air conditioner further comprises: a communication circuit, the communication circuit being connected to the mains, the indoor controller, and the outdoor controller, the indoor controller and the outdoor controller communicating through the communication circuit to maintain normal operation of the split-type air conditioner and update first user data and second user instruction data; a relay electrically connected to the indoor controller, one contact of the relay being connected to the mains, and another contact of the relay being connected to the outdoor controller, wherein the indoor controller controls whether the outdoor controller is powered on through the relay; An indoor temperature sensor, which is used to detect the indoor temperature; an outdoor temperature sensor, which is used to detect outdoor temperature; The controller is configured such that, when the relay is closed and the outdoor controller is powered on, the communication circuit fails, the outdoor controller cannot receive the operation instruction, and if the communication circuit fails after waiting for a period of time and still does not recover, the indoor controller determines whether the relationship between the indoor temperature and the operation instruction at this time meets the first user data, and controls the on and off of the relay accordingly: When the operation instruction is a cooling instruction, determining whether the indoor temperature reaches a first preset temperature threshold; when the indoor temperature reaches or exceeds the first preset temperature threshold, determining that the indoor temperature and the operation instruction are consistent with the first user data, keeping the relay connected and powering on the outdoor controller; otherwise, disconnecting the relay and stopping power supply to the outdoor controller; When the operation instruction is a heating instruction, determining whether the indoor temperature reaches a second preset temperature threshold; when the indoor temperature reaches below the second preset temperature threshold, determining that the indoor temperature and the operation instruction meet the first user data, keeping the relay connected and continuing to supply power to the outdoor controller; otherwise, disconnecting the relay and stopping supplying power to the outdoor controller; When the operation command is the air supply command, the relay is disconnected; When the relay is closed, if the outdoor controller still does not receive any instruction after a period of time, the outdoor controller controls the operation of various components of the outdoor unit according to the outdoor temperature and the second user data.

2. The split-type air conditioner according to claim 1, characterized in that: When the relay maintains the connected state, the outdoor controller is configured to: If the outdoor temperature reaches or exceeds a third preset temperature threshold, controlling the outdoor unit to enter a cooling mode; If the outdoor temperature does not reach above the third preset temperature threshold, it is determined that the outdoor temperature reaches below the fourth preset temperature threshold, and the outdoor unit is controlled to enter the heating mode; If the outdoor temperature does not reach or exceed the third preset temperature threshold and the outdoor temperature does not reach or exceed the fourth preset temperature threshold, the components of the outdoor unit do not operate.

3. The split-type air conditioner according to claim 2, characterized in that: Also includes: Indoor coil temperature sensor, which is used to detect indoor coil temperature; Outdoor coil temperature sensor, which is used to detect the outdoor coil temperature; When the outdoor temperature reaches or exceeds a third preset temperature threshold, the outdoor controller enters the cooling mode, the outdoor coil temperature is higher than the outdoor temperature, and the indoor coil temperature is lower than the indoor temperature. After the compressor runs at the first set frequency for a period of time, the indoor controller determines the indoor coil temperature and the indoor temperature. When the indoor coil temperature is not higher than the indoor temperature, the outdoor unit is judged to be operating in accordance with the setting mode of the corresponding operation instruction and maintains the current working state; When the indoor coil temperature is higher than the indoor temperature, it is determined that the outdoor unit is not operating in accordance with the set mode of the corresponding operation instruction, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working.

4. The split-type air conditioner according to claim 3, characterized in that: The outdoor coil temperature and a first temperature protection threshold are judged. If the outdoor coil temperature reaches or exceeds the first temperature protection threshold, it is judged that the air conditioning system is overloaded, and the outdoor controller stops the operation of the compressor.

5. The split-type air conditioner according to claim 3, characterized in that: During the process of the outdoor controller executing the cooling mode, when the indoor temperature reaches the lower limit of the set cooling temperature range, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working; when the indoor temperature does not reach the upper limit of the set cooling temperature range, the indoor controller closes the relay, and the outdoor controller is powered on to continue the above working process.

6. The split-type air conditioner according to claim 2, characterized in that: When the outdoor temperature reaches below the fourth preset temperature threshold, the outdoor controller enters the heating mode, the outdoor coil temperature is lower than the outdoor temperature, and the indoor coil temperature is higher than the indoor temperature. After the outdoor controller runs at the second set frequency for a period of time, the indoor controller determines the indoor coil temperature and the indoor temperature. If the indoor coil temperature is not lower than the indoor temperature, the outdoor unit is judged to be operating according to the set mode and maintains the current operating state; If the indoor coil temperature is lower than the indoor temperature, it is determined that the outdoor unit is not operating according to the set mode at this time, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working.

7. The split-type air conditioner according to claim 6, characterized in that: The indoor pipe temperature and the second temperature protection threshold are judged. When the indoor pipe temperature reaches above the second temperature protection threshold, the air conditioning system is judged to be overloaded, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working.

8. The split-type air conditioner according to claim 6, characterized in that: During the process of the outdoor controller executing the cooling mode, when the indoor temperature reaches the upper limit of the set heating temperature range, the indoor controller disconnects the relay, and the outdoor controller is powered off and stops working; when the indoor temperature does not reach the lower limit of the set heating temperature range, the indoor controller maintains the relay connection, and the outdoor controller is powered on and continues to work.

9. The split-type air conditioner according to claim 1, characterized in that: When the indoor controller receives the operation instruction, the relay is connected, the outdoor controller is powered on, and the indoor controller sends the operation instruction to the outdoor controller through the communication circuit. The outdoor controller receives the operation instruction and the outdoor temperature at this time and stores them in the first data storage unit of the outdoor controller. The outdoor controller sends the operation instruction and the outdoor temperature at this time to the indoor controller. The indoor controller receives the above information and the indoor temperature at this time and stores them in the second data storage unit of the indoor controller. After a period of work, the first user data and the second user data reflecting the user's usage habits are obtained.

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