Air conditioner

Abstract

An air conditioner is provided. The air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, a concentration sensor, a control device and a controller. The concentration sensor is configured to detect a concentration value of a refrigerant in a chamber. The control device is configured to send an indication signal. The controller is configured to obtain the concentration value, detected by the concentration sensor, of the refrigerant; when the concentration value is larger than or equal to a preset first concentration threshold value and the indoor heat exchanger works as an evaporator, the compressor is controlled to operate at a preset target working frequency; and when the indication signals from the control device are received, only the indication signals used for indicating opening or closing of the air conditioner in the indication signals are executed.

Description

air conditioner

[0001] This application claims priority to Chinese patent application No. 202210764206.6 filed on June 30, 2022, priority to Chinese patent application No. 202210761284.0 filed on June 30, 2022, and priority to Chinese patent application No. 202210761276.6 filed on June 30, 2022, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of household appliances, and in particular to an air conditioner. Background Art

[0003] An air conditioner's refrigeration cycle uses a compressor, condenser, expansion valve, and evaporator. This cycle involves a series of processes: compression, condensation, expansion, and evaporation. The air conditioner's refrigeration cycle relies on the refrigerant, which releases heat during condensation and absorbs heat during evaporation, thus enabling heat exchange and transfer.

[0004] Summary of the Invention

[0005] An air conditioner is provided. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a concentration sensor, a control device, and a controller. The concentration sensor is configured to detect a concentration value of a refrigerant in a room. The control device is configured to send an indication signal. The controller is configured to obtain the concentration value of the refrigerant detected by the concentration sensor; when the concentration value is greater than or equal to a preset first concentration threshold and the indoor heat exchanger operates as an evaporator, control the compressor to operate at a preset target operating frequency; and when receiving the indication signal from the control device, only execute the indication signal in the indication signal for instructing the air conditioner to turn on or off. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. However, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the products involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signals, etc.

[0007] FIG1 is a block diagram of an air conditioner according to some embodiments;

[0008] FIG2 is a structural diagram of an air conditioner according to some embodiments;

[0009] FIG3 is a structural diagram of another air conditioner according to some embodiments;

[0010] FIG4 is a block diagram of another air conditioner according to some embodiments;

[0011] FIG5 is a flow chart of a controller of an air conditioner according to some embodiments;

[0012] FIG6 is a flow chart of a controller of another air conditioner according to some embodiments;

[0013] FIG7 is a flow chart of a controller of another air conditioner according to some embodiments;

[0014] FIG8 is a structural diagram of an indoor unit of an air conditioner according to some embodiments. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0016] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0017] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0018] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0019] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0020] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0021] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0022] With the widespread use of air conditioners, users are increasingly demanding environmentally friendly air conditioners. The air conditioner's refrigeration cycle relies on refrigerants. For example, R290 refrigerant is environmentally friendly and, as such, is widely used in air conditioners. However, R290 refrigerant is flammable, and leaks pose safety risks, such as explosions.

[0023] Air conditioners are typically equipped with anti-dismantling structures and warning labels. For example, installing an anti-dismantling structure on an air conditioner can prevent it from being disassembled indoors, thereby preventing refrigerant from leaking into the indoor environment. Warning labels posted on or near the air conditioner can alert indoor users to the dangers of refrigerant leaks.

[0024] However, it's understandable that the above configuration can't completely prevent refrigerant leaks during air conditioner operation. For example, installing an anti-disassembly structure on an air conditioner can prevent it from being disassembled a second time indoors, thereby preventing refrigerant leaks caused by improper reassembly. However, if a refrigerant leak already exists when the air conditioner is first installed, installing an anti-disassembly structure on the air conditioner won't effectively prevent it. Furthermore, posting a warning label only alerts those who pay attention to the label's content, but has very limited effectiveness for those who don't.

[0025] Methods for detecting refrigerant leaks include pressure testing and leak detection methods.

[0026] For example, when using a pressure test to detect refrigerant leaks, one or more pressure gauges are required in the air conditioner's refrigerant circuit. A refrigerant leak can be determined when any of the pressure gauges detects a rapid drop in refrigerant pressure in the refrigerant circuit. However, the pressure test method cannot pinpoint the location of the refrigerant leak and cannot accurately determine the presence of a refrigerant leak if the leak is minor.

[0027] For example, when using a leak detector to detect refrigerant leaks, a leak detector is added to the refrigerant circuit. The leak detector dyes the refrigerant, so that when a leak occurs, the leak detector leaks along with the refrigerant, alerting the user. However, adding a leak detector to the refrigerant can degrade refrigerant performance, such as reducing its cooling capacity. Furthermore, leaking the leak detector along with the refrigerant can pose a greater safety hazard.

[0028] Some embodiments of the present disclosure provide an air conditioner 1000. As shown in FIG1 , the air conditioner 1000 includes an outdoor unit 1, an indoor unit 2, and an expansion valve 3. The outdoor unit 1 includes a compressor 11 and an outdoor heat exchanger 12. The indoor unit 2 includes an indoor heat exchanger 21. The expansion valve 3 can be provided in either the outdoor unit 1 or the indoor unit 2.

[0029] The outdoor heat exchanger 12 and the indoor heat exchanger 21 can function as either an evaporator or a condenser. For example, when the outdoor heat exchanger 12 functions as an evaporator and the indoor heat exchanger 21 functions as a condenser, the air conditioner 1000 operates in a heating cycle. When the outdoor heat exchanger 12 functions as a condenser and the indoor heat exchanger 21 functions as an evaporator, the air conditioner 1000 operates in a cooling cycle.

[0030] Air conditioner 1000 performs a refrigeration cycle or a heating cycle through compressor 11, condenser, expansion valve 3, and evaporator. The refrigeration cycle and heating cycle include compression, condensation, expansion, and evaporation. During each of these cycles, the refrigerant absorbs or releases heat to cool or heat the indoor space, thereby regulating the indoor temperature.

[0031] Compressor 11 compresses the refrigerant gas to a high-temperature, high-pressure state and discharges it from compressor 11. The compressed refrigerant gas flows into the condenser. The condenser condenses the compressed, high-temperature, high-pressure gaseous refrigerant into liquid refrigerant, releasing the heat of the refrigerant into the surrounding environment through the condensation process.

[0032] The liquid refrigerant flowing out of the condenser enters the expansion valve 3, which expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into low-pressure liquid refrigerant. The low-pressure liquid refrigerant flowing out of the expansion valve 3 enters the evaporator. As it passes through the evaporator, it absorbs heat and evaporates into low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas returns to the compressor 11.

[0033] The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. During the circulation of the refrigerant, the air conditioner 1000 can adjust the temperature of the indoor space.

[0034] In some embodiments, as shown in FIG. 2 and FIG. 3 , the air conditioner 1000 further includes a pipeline 4 , a first solenoid valve 51 , a second solenoid valve 52 , a first stop valve 61 , a second stop valve 62 and a four-way valve 7 .

[0035] Pipeline 4 is configured to connect indoor heat exchanger 21, outdoor heat exchanger 12, compressor 11, expansion valve 3, first solenoid valve 51, second solenoid valve 52, first stop valve 61, second stop valve 62, and four-way valve 7 to form a refrigerant circuit. Refrigerant circulates in the refrigerant circuit, exchanging heat with air through outdoor heat exchanger 12 and indoor heat exchanger 21, respectively, to achieve a cooling cycle or a heating cycle of air conditioner 1000.

[0036] The expansion valve 3 is connected between the indoor heat exchanger 21 and the outdoor heat exchanger 12 and is configured to expand the liquid refrigerant that has undergone the condensation process into a low-pressure liquid refrigerant. For example, the expansion valve 3 is an electronic expansion valve.

[0037] The first solenoid valve 51 is disposed in the pipeline 4 between the expansion valve 3 and the indoor heat exchanger 21 and is configured to regulate the flow rate of the flowing medium in the pipeline 4 between the expansion valve 3 and the indoor heat exchanger 21. The first shut-off valve 61 is disposed in the pipeline 4 between the first solenoid valve 51 and the indoor heat exchanger 21 and is configured to shut off and throttle the flowing medium in the pipeline 4 between the first solenoid valve 51 and the indoor heat exchanger 21.

[0038] The indoor heat exchanger 21 and the outdoor heat exchanger 12 are each connected to the compressor 11. For example, the indoor heat exchanger 21 and the outdoor heat exchanger 12 are each connected to the compressor 11 via a four-way valve 7. A second solenoid valve 52 is disposed in the pipeline 4 between the four-way valve 7 and the indoor heat exchanger 21 and is configured to regulate the flow rate of the fluid in the pipeline 4 between the four-way valve 7 and the indoor heat exchanger 21. A second shut-off valve 62 is disposed between the second solenoid valve 52 and the indoor heat exchanger 21 and is configured to shut off and throttle the fluid in the pipeline 4 between the second solenoid valve 52 and the indoor heat exchanger 21.

[0039] The indoor heat exchanger 21 includes a first communication port 211 and a second communication port 212. The first communication port 211 is connected to the first stop valve 61, and the second communication port 212 is connected to the second stop valve 62. The outdoor heat exchanger 12 includes a third communication port 121 and a fourth communication port 122. The third communication port 121 is connected to the expansion valve 3, and the fourth communication port 122 is connected to the four-way valve 7.

[0040] The compressor 11 includes an air intake 111 and an air discharge 112 . Refrigerant that has absorbed heat and evaporated enters the compressor 11 from the air intake 111 . The compressor 11 compresses the gaseous refrigerant into a high-temperature and high-pressure state and then discharges it from the air discharge 112 .

[0041] The four-way valve 7 includes a first valve port 71, a second valve port 72, a third valve port 73, and a fourth valve port 74. The first valve port 71 is fixedly connected to the air intake port 111, and the third valve port 73 is fixedly connected to the air exhaust port 112. When the air conditioner 1000 is in cooling mode, the first valve port 71 is connected to the second valve port 72, and the third valve port 73 is connected to the fourth valve port 74. When the air conditioner 1000 is in heating mode, the first valve port 71 is connected to the fourth valve port 74, and the second valve port 72 is connected to the third valve port 73.

[0042] The air conditioner 1000 further includes an exhaust gas sensor disposed in the pipeline 4 between the exhaust port 112 and the third valve port 73 and configured to measure the exhaust gas temperature of the compressor 11 .

[0043] The air conditioner 1000 includes a first operating mode (such as a cooling mode) and a second operating mode (such as a heating mode).

[0044] When the air conditioner 1000 operates in the first operating mode, the indoor heat exchanger 21 functions as an evaporator, and the outdoor heat exchanger 12 functions as a condenser. The compressor 11 compresses the gaseous refrigerant into a high-temperature, high-pressure state and discharges the high-temperature, high-pressure refrigerant gas from the exhaust port 112. The high-temperature, high-pressure refrigerant gas enters the outdoor heat exchanger 12 via the four-way valve 7 and the fourth connecting port 122, where it condenses within the outdoor heat exchanger 12, releasing the refrigerant's heat into the surrounding environment. The high-temperature, high-pressure refrigerant gas undergoes condensation, transforming from a gas into a liquid state and flowing through the third connecting port 121 into the expansion valve 3. The expansion valve 3 expands the high-pressure liquid refrigerant into a low-pressure liquid refrigerant.

[0045] The liquid refrigerant flowing out of the expansion valve 3 flows into the indoor heat exchanger 21 via the first solenoid valve 51, the first shut-off valve 61, and the first communication port 211. The low-pressure liquid refrigerant evaporates in the indoor heat exchanger 21 to exchange heat with the indoor environment, absorbing heat and changing from liquid to gas. The low-temperature, low-pressure refrigerant gas enters the compressor 11 via the second communication port 212, the second shut-off valve 62, the second solenoid valve 52, the four-way valve 7, and the intake port 111. The compressor 11 compresses the refrigerant gas from the low-temperature, low-pressure state to a high-temperature, high-pressure state and discharges it from the exhaust port 112. The high-temperature, high-pressure refrigerant gas enters the outdoor heat exchanger 12 again via the four-way valve 7 and the fourth communication port 122, and is condensed again in the outdoor heat exchanger 12.

[0046] In this way, when the air conditioner 1000 is operating in the first working mode, the refrigerant flowing through the indoor heat exchanger 21 absorbs heat by consuming the electric energy supplied to the compressor 11, thereby reducing the temperature of the indoor environment.

[0047] When the air conditioner 1000 operates in the second operating mode, the indoor heat exchanger 21 functions as a condenser, and the outdoor heat exchanger 12 functions as an evaporator. The compressor 11 compresses the gaseous refrigerant into a high-temperature, high-pressure state and discharges the high-temperature, high-pressure refrigerant gas from the exhaust port 112. The high-temperature, high-pressure refrigerant gas enters the indoor heat exchanger 21 via the four-way valve 7, the second solenoid valve 52, the second shut-off valve 62, and the second communication port 212. There, it condenses within the indoor heat exchanger 21, releasing the refrigerant's heat into the indoor environment, raising the indoor temperature. The high-temperature, high-pressure refrigerant gas undergoes condensation, transforming from a gas into a liquid state. The refrigerant then flows through the first communication port 211, the first shut-off valve 61, and the first solenoid valve 51 into the expansion valve 3. The expansion valve 3 expands the high-pressure liquid refrigerant into a low-pressure liquid refrigerant.

[0048] The liquid refrigerant flowing out of the expansion valve 3 flows into the outdoor heat exchanger 12 through the third communication port 121. The low-pressure liquid refrigerant evaporates in the outdoor heat exchanger 12, absorbing heat from the outdoor environment. As a result, the low-pressure liquid refrigerant evaporates into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas enters the compressor 11 through the fourth communication port 122, the four-way valve 7, and the intake port 111. The compressor 11 compresses the refrigerant gas from its low-temperature, low-pressure state to a high-temperature, high-pressure state and discharges it through the exhaust port 112. The high-temperature, high-pressure refrigerant gas enters the indoor heat exchanger 21 again through the four-way valve 7, the second solenoid valve 52, the second shut-off valve 62, and the second communication port 212 to undergo a condensation process.

[0049] In this way, when the air conditioner 1000 is operating in the second working mode, the refrigerant flowing through the indoor heat exchanger 21 dissipates heat by consuming the electric energy supplied to the compressor 11, thereby increasing the temperature of the indoor environment.

[0050] In some embodiments, as shown in FIG4 , the air conditioner 1000 further includes a concentration sensor 8 and a controller 9. The concentration sensor 8 is provided on the indoor unit 2 and is located at a position where the indoor unit 2 is prone to refrigerant leakage. For example, referring to FIG2 or FIG3 , the concentration sensor 8 is provided at the connection between the indoor heat exchanger 21 and the second stop valve 62, or at the connection between the first stop valve 61 and the indoor heat exchanger 21. The concentration sensor 8 is configured to detect the current concentration value A of the refrigerant and send a signal representing the current concentration value A (i.e., the concentration value) to the controller 9. For example, the concentration sensor 8 sends the detected signal representing the current concentration value A of the refrigerant to the controller 9. The controller 9 is connected to the compressor 11 and the concentration sensor 8, respectively, and is configured to receive the signal from the concentration sensor 8.

[0051] FIG5 is a flow chart of a controller 9 of an air conditioner 1000 according to some embodiments. As shown in FIG5 , the controller 9 is configured to execute steps 101 to 106 .

[0052] In step 101 , when the current concentration value A of the refrigerant is greater than or equal to a preset first concentration threshold, it is determined that the refrigerant has leaked.

[0053] In some embodiments, as shown in FIG4 , the concentration sensor 8 includes a control component 81. The control component 81 is configured to determine whether refrigerant leakage occurs based on the current concentration value A of the refrigerant detected by the concentration sensor 8, and to send a signal indicating refrigerant leakage to the controller 9 if it is determined that refrigerant leakage occurs.

[0054] For example, when the concentration sensor 8 detects that the current indoor refrigerant concentration value A is greater than or equal to a first concentration threshold, the control component 81 determines that a refrigerant leak has occurred and sends a signal indicating a refrigerant leak to the controller 9. In this case, upon receiving the signal indicating a refrigerant leak, the controller 9 determines that a refrigerant leak has occurred. When the concentration sensor 8 detects that the current indoor refrigerant concentration value A is less than the first concentration threshold, the control component 81 determines that a refrigerant leak has not occurred and does not send a signal indicating a refrigerant leak to the controller 9.

[0055] It should be noted that the first concentration threshold is a value preset in the control component 81. The first concentration threshold can be adjusted according to actual needs, and this disclosure does not limit this.

[0056] For example, the first concentration threshold is a value lower than the lowest concentration at which the refrigerant may explode in an indoor environment. The refrigerant concentration value at which no explosion occurs in an indoor environment can be obtained through experimental results.

[0057] It is understandable that by setting the first concentration threshold to be lower than the minimum concentration value at which the refrigerant may explode in an indoor environment, an alarm can be issued and a refrigerant recovery mode can be executed when the refrigerant leakage is small, thereby reducing the risk of explosion caused by refrigerant leakage.

[0058] In some embodiments, the first concentration threshold is preset in the controller 9. The controller 9 receives a signal representing the current refrigerant concentration value A from the concentration sensor 8 and determines whether a refrigerant leak has occurred based on the signal. For example, the concentration sensor 8 detects the current refrigerant concentration value A and transmits a signal representing the current refrigerant concentration value A to the controller 9. The controller 9 determines whether a refrigerant leak has occurred based on the signal.

[0059] For example, when the controller 9 receives a signal representing the current refrigerant concentration value A from the concentration sensor 8, the controller 9 determines, based on the signal, whether the current refrigerant concentration value A is greater than or equal to the first concentration threshold. If the current refrigerant concentration value A is greater than or equal to the first concentration threshold, the controller 9 determines that a refrigerant leak has occurred. If the current refrigerant concentration value A is less than the first concentration threshold, the controller determines that no refrigerant leak has occurred.

[0060] In step 102, when it is determined that the refrigerant leaks, the air conditioner 1000 is controlled to operate in a refrigerant recovery mode.

[0061] For example, during operation of the air conditioner 1000, when the controller 9 receives a signal from the concentration sensor 8 indicating a refrigerant leak, or when the controller 9 receives a signal from the concentration sensor 8 indicating a current refrigerant concentration value A and determines that the current refrigerant concentration value A is greater than or equal to the first concentration threshold, the controller 9 determines that a refrigerant leak has occurred. If the controller 9 determines that a refrigerant leak has occurred, the controller 9 controls the air conditioner 1000 to operate in a refrigerant recovery mode.

[0062] In some embodiments, the refrigerant recovery mode includes a first recovery mode and a second recovery mode. When the air conditioner 1000 operates in the first operating mode and the indoor heat exchanger 21 is used as an evaporator, the air conditioner 1000 simultaneously operates in the first recovery mode to recover leaked refrigerant. When the air conditioner 1000 operates in the second operating mode and the indoor heat exchanger 21 is used as a condenser, the air conditioner 1000 simultaneously operates in the second recovery mode to recover leaked refrigerant.

[0063] The controller 9 is further configured to determine the current operating mode of the air conditioner 1000 when determining that the refrigerant leak occurs, and control the air conditioner 1000 to operate in the first recovery mode or the second recovery mode according to the current operating mode of the air conditioner 1000.

[0064] When the controller 9 controls the air conditioner 1000 to operate in the first recovery mode, the indoor heat exchanger 21 operates as an evaporator, and the controller 9 controls the compressor 11 to operate at the target operating frequency F1. When the controller 9 controls the air conditioner 1000 to operate in the second recovery mode, the indoor heat exchanger 21 switches from operating as a condenser to operating as an evaporator, and the controller 9 controls the compressor 11 to operate at the target operating frequency F1.

[0065] It should be noted that the target operating frequency F1 is a value preset in the controller 9 and can be adjusted according to actual needs, which is not limited in this disclosure. For example, the target operating frequency F1 can be determined based on experimental results, simulation experiments, or theoretical calculations.

[0066] In step 103 , an instruction signal is received from a control device.

[0067] In some embodiments, the air conditioner 1000 further includes a control device coupled to the controller and configured to send an instruction signal to the controller 9. The control device includes at least one of a remote control or a mobile device. The mobile device may be, for example, a mobile phone, a tablet computer, or the like. The mobile device is pre-installed with remote control software, which corresponds to the air conditioner 1000 and includes at least one of an application and software for Bluetooth communication technology (i.e., Bluetooth software).

[0068] The instruction signal includes an instruction signal for instructing the air conditioner 1000 to turn on or off, and an instruction signal for instructing the air conditioner 1000 to change parameters. The parameters of the air conditioner 1000 include wind direction parameters and temperature parameters.

[0069] For example, the user can send an instruction signal to the controller 9 through the control device to instruct the air conditioner 1000 to turn on or off, and the controller 9 controls the air conditioner 1000 to turn on or off in response to the instruction signal from the control device. Alternatively, the user can send an instruction signal to the controller 9 through the control device to instruct the air conditioner 1000 to change the air direction, and the controller 9 controls the air conditioner 1000 to change the air direction in response to the instruction signal from the control device.

[0070] In step 104 , it is determined whether the instruction signal is an instruction signal for instructing the air conditioner 1000 to turn on or off. If so, step 105 is executed; if not, step 106 is executed.

[0071] In some embodiments, during operation of the air conditioner 1000, when the controller 9 receives a signal from the concentration sensor 8 indicating a refrigerant leak, or when the controller 9 receives a signal from the concentration sensor 8 indicating the current refrigerant concentration value A and determines that the current refrigerant concentration value A is greater than or equal to the first concentration threshold, the controller 9 determines that a refrigerant leak has occurred and controls the air conditioner 1000 to operate in a refrigerant recovery mode. When the air conditioner 1000 operates in the refrigerant recovery mode, with the indoor heat exchanger 21 operating as an evaporator and the compressor 11 operating at the target operating frequency F1, the controller 9 receives any indication signal from the control device and determines whether the indication signal is an indication signal for instructing the air conditioner 1000 to turn on or off.

[0072] In step 105 , the air conditioner 1000 is controlled to perform the operation indicated by the instruction signal.

[0073] In step 106, the air conditioner 1000 is controlled to continue operating in the refrigerant recovery mode.

[0074] In some embodiments, when the air conditioner 1000 operates in the refrigerant recovery mode, the controller 9 receives any indication signal from the control device and determines whether the indication signal is an indication signal for instructing the air conditioner 1000 to turn on or off.

[0075] When the controller 9 determines that the instruction signal is an instruction signal for instructing the air conditioner 1000 to turn on or off, the controller 9 controls the air conditioner 1000 to turn on or off. When the controller 9 determines that the instruction signal is not an instruction signal for instructing the air conditioner 1000 to turn on or off, the controller 9 controls the air conditioner 1000 to continue operating in the refrigerant recovery mode without performing the operation indicated by the instruction signal.

[0076] It is understood that when the air conditioner 1000 is operating in the refrigerant recovery mode, the controller 9 controls the air conditioner 1000 to turn on or off only in response to the instruction signal from the control device for instructing the air conditioner 1000 to turn on or off. This prevents the air conditioner 1000 from performing operations other than turning on or off while operating in the refrigerant recovery mode, thereby preventing the refrigerant recovery mode from being disturbed and reducing safety risks caused by refrigerant leakage.

[0077] For example, when the air conditioner 1000 is running in the refrigerant recovery mode and the controller 9 receives an indication signal from the control device to instruct the air conditioner 1000 to turn on, the controller 9 controls the air conditioner 1000 to keep running in the refrigerant recovery mode to avoid interference with the refrigerant recovery mode and reduce the safety hazards caused by refrigerant leakage.

[0078] When the air conditioner 1000 runs in the refrigerant recovery mode and the controller 9 receives an indication signal from the control device for instructing the air conditioner 1000 to shut down, the controller 9 controls the air conditioner 1000 to shut down, which helps to avoid further leakage of refrigerant and excessive concentration of indoor refrigerant, thereby reducing the safety hazards caused by excessive refrigerant concentration.

[0079] In some embodiments, the indoor unit 2 includes a sound-generating device. The sound-generating device comprises at least one of a speaker or a buzzer and is coupled to the controller 9. The sound-generating device is configured to emit a sound under the control of the controller 9 to remind the user that the air conditioner 1000 is in refrigerant recovery mode. For example, when a user uses the remote control to control the air conditioner 1000 and the air conditioner 1000 is in refrigerant recovery mode, the indoor unit 2 emits a sound to remind the user, and the air conditioner 1000 does not adjust according to the instruction signal from the remote control.

[0080] In some embodiments, the sound emitted by the indoor unit 2 when the air conditioner 1000 is in the refrigerant recovery mode is different from the sound emitted when the air conditioner 1000 is not in the refrigerant recovery mode, so as to facilitate user distinction.

[0081] In some embodiments, the remote control software is also used to prompt the user that the air conditioner 1000 is in a refrigerant leakage state, to remind the user that the refrigerant leakage has occurred, and to remind the user to be cautious when turning on electrical equipment, thereby reducing the safety risks caused by the refrigerant leakage.

[0082] For example, when the user remotely controls the air conditioner 1000 through the remote control software, and the current concentration value A of the refrigerant is greater than or equal to the first concentration threshold, the remote control software displays a message indicating that "the air conditioner 1000 is in a refrigerant leakage state" through the display device in the mobile device to prompt the user that the refrigerant has leaked and remind the user to be cautious when turning on electrical equipment.

[0083] In some embodiments, the indoor unit 2 further comprises a front panel, wherein the front panel comprises a refrigerant warning light, which is coupled to the controller 9 and configured to turn on when refrigerant leakage occurs.

[0084] For example, when it is determined that the refrigerant has leaked, the controller 9 controls the refrigerant alarm light to turn on to remind the user that the refrigerant has leaked, so that the user can reduce the number of electrical devices turned on, thereby reducing the safety risks caused by the refrigerant leak.

[0085] In some embodiments, when the air conditioner 1000 operates in refrigerant recovery mode, with the indoor heat exchanger 21 functioning as an evaporator and the compressor 11 operating at the target operating frequency F1, the refrigerant in the outdoor heat exchanger 12 flows into the indoor heat exchanger 21 via the first solenoid valve 51, and then flows back into the outdoor heat exchanger 12 via the second solenoid valve 52 and the compressor 11. This causes the recovered refrigerant to re-enter the indoor heat exchanger 21 and potentially leak again. Therefore, it is necessary to close the first solenoid valve 51 to cut off the source of refrigerant flowing into the indoor heat exchanger 21 and prevent further leakage of the recovered refrigerant.

[0086] As shown in FIG4 , the first solenoid valve 51 is coupled to the controller 9. The controller 9 is further configured to control the opening and closing of the first solenoid valve 51. For example, when the air conditioner 1000 is operating in the first recovery mode or the second recovery mode, and the air conditioner 1000 is in the cooling mode, with the compressor 11 operating at the target operating frequency F1, the controller 9 controls the first solenoid valve 51 to close, preventing the refrigerant in the outdoor unit 1 from flowing through the first solenoid valve 51 to the indoor unit 2, thereby cutting off the source of refrigerant in the indoor unit 2.

[0087] In some embodiments, during operation of the air conditioner 1000, when the air conditioner 1000 operates in refrigerant recovery mode, the controller 9 controls the first solenoid valve 51 to close, thereby cutting off the source of refrigerant within the indoor heat exchanger 21. The controller 9 also controls the air conditioner 1000 to operate in refrigerant dilution mode to dilute the concentration of indoor refrigerant and reduce the safety risks caused by excessive refrigerant concentration. As shown in FIG6 , after the controller 9 executes step 102, the controller 9 is further configured to execute steps 201 to 205.

[0088] In step 201 , the first solenoid valve 51 is controlled to be closed.

[0089] For example, when the air conditioner 1000 operates in the refrigerant recovery mode, the controller 9 controls the first solenoid valve 51 to close, so that the refrigerant in the outdoor unit 1 cannot flow to the indoor heat exchanger 21 through the first solenoid valve 51, thereby cutting off the source of refrigerant in the indoor heat exchanger 21.

[0090] In step 202, the damper and the air valve are controlled to be in the maximum air outlet state, the indoor fan is controlled to be turned on, and the fresh air fan is controlled to be turned on.

[0091] In some embodiments, the air conditioner 1000 further includes a damper, an indoor fan, and a fresh air system. The fresh air system includes a damper and a fresh air fan. The fresh air system is used to convert fresh outdoor air into fresh air and deliver it indoors to achieve a certain degree of air exchange. The damper is configured to adjust the airflow of conditioned air. The indoor fan is configured to deliver air from the indoor unit 2 to the indoor space. The fresh air fan is configured to deliver outdoor air to the indoor space. The damper, indoor fan, damper, and fresh air fan are coupled to a controller 9.

[0092] For example, when the air conditioner 1000 is operating in refrigerant recovery mode and the first solenoid valve 51 is closed, the controller 9 is further configured to control the damper and the air valve to be in a maximum air flow state. When the damper is in the maximum air flow state, the resistance to air supply from the indoor unit 2 is reduced, and the rate at which the refrigerant is dispersed within the indoor space is accelerated, thereby diluting the refrigerant and reducing safety hazards caused by excessive refrigerant concentration. When the air valve is in the maximum air flow state, the resistance to outdoor air entering the room is reduced, thereby accelerating the rate of refrigerant dilution and reducing safety hazards caused by excessive refrigerant concentration.

[0093] When the air conditioner 1000 runs in the refrigerant recovery mode and the first solenoid valve 51 is closed, the controller 9 is also configured to control the indoor fan and the fresh air fan to turn on, so that the outdoor air passes through the air conditioner 1000 and enters the room, thereby diluting the refrigerant leaked in the indoor air, reducing the concentration of the refrigerant leaked in the indoor air, and reducing the safety hazards caused by the excessive refrigerant concentration.

[0094] In step 203, the indoor fan is controlled to operate at a working speed greater than or equal to a first preset speed M, and the fresh air fan is controlled to operate at a working speed greater than or equal to a second preset speed N.

[0095] In some embodiments, when the indoor fan is turned on, the controller 9 is further configured to control the indoor fan to operate at an operating speed greater than or equal to a first preset speed M, so that the refrigerant in the indoor heat exchanger 21 is evaporated more quickly and then enters the compressor 11, thereby improving the refrigerant recovery efficiency. For example, when the indoor fan is turned on, the controller 9 controls the indoor fan to operate at an operating speed 1.5 times the first preset speed M.

[0096] When the fresh air system is turned on, the controller 9 is further configured to control the fresh air fan to operate at an operating speed greater than or equal to a second preset speed N, so that outdoor air enters the room more quickly, thereby improving the efficiency of diluting the refrigerant. For example, when the fresh air fan is turned on, the controller 9 controls the fresh air fan to operate at an operating speed twice the second preset speed N.

[0097] It should be noted that the higher the operating speed of the indoor fan, the higher the efficiency of the refrigerant evaporating and releasing heat in the indoor heat exchanger 21. The first preset speed M is greater than the second preset speed N, and the first preset speed M is 8 to 12 times the second preset speed N. For example, the first preset speed M is 8 times, 10 times, or 12 times the second preset speed N. The first preset speed M and the second preset speed N are values ​​preset in the controller 9, and the first preset speed M and the second preset speed N can be adjusted according to actual needs, which is not limited in this disclosure.

[0098] In step 204 , a signal representing the current refrigerant concentration value A is received from the concentration sensor 8 , and it is determined that the current refrigerant concentration value A is less than or equal to a preset dilution concentration value B and is maintained for a preset time Tw.

[0099] In some embodiments, the concentration sensor 8 detects the current refrigerant concentration value A and transmits a signal representing the current refrigerant concentration value A to the controller 9. The controller 9 receives the signal representing the current refrigerant concentration value A from the concentration sensor 8 and determines the relationship between the current refrigerant concentration value A and a preset dilution concentration value B. When the current refrigerant concentration value A is less than or equal to the preset dilution concentration value B and remains so for a preset time Tw, the controller 9 determines that the refrigerant dilution process is complete.

[0100] It should be noted that the preset time Tw and the preset dilution concentration value B are values ​​preset in the controller 9, and the preset time Tw and the preset dilution concentration value B can be adjusted according to actual needs, which is not limited in the present disclosure.

[0101] The preset time Tw can be tested based on experimental results or calculated based on theoretical analysis. For example, the preset time Tw is set to 10 minutes. That is to say, the current concentration value A of the refrigerant has been maintained at a state less than or equal to the preset dilution concentration value B for 10 minutes, and it can be considered that the dilution process of the refrigerant has been completed. In addition, the preset time Tw can be adjusted according to actual needs, which can avoid the preset time Tw being too long, and avoid the fresh air fan and the indoor fan from maintaining a high speed for too long, thereby reducing the wear of the fresh air fan and the indoor fan and extending their service life.

[0102] In some embodiments, the preset dilution concentration value B is preset in the control component 81 of the concentration sensor 8, rather than in the controller 9. The control component 81 is further configured to determine the magnitude relationship between the current refrigerant concentration value A and the preset dilution concentration value B based on the signal of the current refrigerant concentration value A detected by the concentration sensor 8, and, if it is determined that the current refrigerant concentration value A is less than or equal to the preset dilution concentration value B, send a signal to the controller 9 indicating that the current refrigerant concentration value A is less than or equal to the preset dilution concentration value B. This can reduce the number of preset programs in the controller 9 and speed up the execution of steps by the controller 9.

[0103] For example, the control component 81 determines the magnitude relationship between the current refrigerant concentration value A and the preset dilution concentration value B based on the signal of the current refrigerant concentration value A detected by the concentration sensor 8. When the current refrigerant concentration value A is less than or equal to the preset dilution concentration value B, the control component 81 sends a signal indicating that the current refrigerant concentration value A is less than or equal to the preset dilution concentration value B to the controller 9.

[0104] When the controller 9 receives a signal from the control component 81 indicating that the current refrigerant concentration value A is less than or equal to the preset dilution concentration value B and maintains the value for the preset time Tw, the controller 9 determines that the refrigerant dilution process is completed.

[0105] When the concentration sensor 8 detects that the current concentration value A of the indoor refrigerant is greater than the preset dilution concentration value B, the control component 81 does not send a signal indicating that the current concentration value A of the refrigerant is less than or equal to the preset dilution concentration value B to the controller 9 .

[0106] In step 205 , the operating speed of the fresh air fan is controlled to decrease to 0 at a first rate V1 , and the operating speed of the indoor air fan is controlled to decrease to 0 at a second rate V2 .

[0107] For example, when the current refrigerant concentration value A is less than or equal to the preset dilution concentration value B and remains so for a preset time Tw, the controller 9 determines that the refrigerant has been completely diluted. When the controller 9 determines that the refrigerant has been completely diluted, the controller 9 is further configured to control the operating speed of the fresh air fan to decrease to 0 at a first rate V1, and to control the operating speed of the indoor fan to decrease to 0 at a second rate V2.

[0108] It should be noted that the operating speed of the fresh air fan is reduced to 0 at a first rate V1, so that the operating speed of the fresh air fan is reduced, thereby avoiding damage to parts of the fresh air fan due to direct shutdown, which is beneficial to extending the service life of the fresh air fan.

[0109] The operating speed of the indoor fan is reduced to 0 at a second rate V2, so that the operating speed of the indoor fan is reduced, thereby avoiding damage to parts of the indoor fan due to direct shutdown, which is beneficial to extending the service life of the fresh air fan.

[0110] It is understood that the first preset speed M is greater than the second preset speed N, and the first preset speed M is 8 to 12 times the second preset speed N. When the indoor fan operates at a speed 1.5 times the first preset speed M, and the fresh air fan operates at a speed 2 times the second preset speed N, and the operating speeds of the indoor fan and the fresh air fan decrease to 0 within the same time, the second speed V2 is greater than the first speed V1, and the second speed V2 is 6 to 9 times the first speed V1. For example, the second speed V2 is 6, 7.5, or 9 times the first speed V1.

[0111] In some embodiments, during operation of the air conditioner 1000, when the air conditioner 1000 operates in a refrigerant recovery mode, the controller 9 controls the first solenoid valve 51 to close, thereby cutting off the source of refrigerant within the indoor heat exchanger 21. The controller 9 also controls the air conditioner 1000 to operate in a refrigerant dilution mode to dilute the concentration of the indoor refrigerant. As shown in FIG7 , when the controller 9 executes step 202, the controller 9 is also configured to execute step 203A.

[0112] In step 203A, the first air guide plate 23 is controlled to rotate to a preset air supply angle β, and the second air guide plate 24 is controlled to swing at a preset swing frequency V3.

[0113] 8 , the indoor unit 2 further includes an air outlet 22 , at least one first air guide plate 23 , and at least one second air guide plate 24 . The first air guide plate 23 and the second air guide plate 24 are respectively disposed at the air outlet 22 .

[0114] The indoor unit 2 delivers air into the room through the air outlet 22. A first air guide plate 23 extends along the length of the indoor unit 2 (i.e., the left-right direction as shown in FIG8 ). The first air guide plate 23 is configured to rotate to adjust the air outlet angle of the indoor unit 2 in the vertical direction of the indoor space (i.e., the vertical direction of the indoor unit 2, as shown in FIG8 ).

[0115] The second air guide plate 24 extends along the height of the indoor unit 2 (i.e., in the vertical direction as shown in Figure 8 ), or alternatively, the second air guide plate 24 extends at an angle relative to the height of the indoor unit 2. The second air guide plate 24 is configured to rotate to adjust the airflow angle of the indoor unit 2 in the horizontal direction of the indoor space (i.e., in the left-right direction of the indoor unit 2, as shown in Figure 8 ). The air conditioner 1000 adjusts the angle and position of the conditioned air delivered by the first and second air guide plates 23, 24.

[0116] In some embodiments, the indoor unit 2 includes at least two first air guide plates 23 and at least two second air guide plates 24. The at least two first air guide plates 23 are spaced apart and arranged at the air outlet 22 along the height direction of the indoor unit 2. At least two second air guide plates 24 are disposed between any two first air guide plates 23 and spaced apart and arranged along the length direction of the indoor unit 2.

[0117] The air conditioner 1000 also includes an electronic control system that can be located above the indoor space. The electronic control system is coupled to industrial frequency alternating current (AC). When the electronic control system is energized, if the air supply from the indoor unit 2 carries refrigerant and blows directly toward the electronic control system, the refrigerant carried in the air supply could enter the electronic control system and be ignited by sparks within the system, posing a safety hazard. When the first air guide plate 23 rotates to a preset air supply angle β, the conditioned air from the air outlet 22 blows directly toward the lower portion of the indoor space, reducing the probability of the conditioned air blowing toward the electronic control system.

[0118] It should be noted that the preset air supply angle β is a value preset in the controller 9. When the air conditioner 1000 operates in both refrigerant dilution mode and refrigerant recovery mode, the refrigerant in the indoor heat exchanger 21 is still leaking. In other words, the air flowing through the indoor heat exchanger 21 and being blown indoors by the indoor fan will carry the leaked refrigerant, causing the conditioned air blown out of the air outlet 22 to carry the refrigerant.

[0119] For example, when the indoor fan is turned on, the controller 9 controls the first air guide plate 23 to rotate to the air supply angle β, so that the air-conditioning air carrying the refrigerant blows directly to the ground, so as to reduce the probability of the air-conditioning air contacting the electronic control system, thereby reducing the safety hazard of explosion caused by the refrigerant contacting the electronic control system.

[0120] It can be understood that since the refrigerant recovery mode is carried out under the refrigeration condition, the air-conditioning wind blown out by the indoor unit 2 has a lower temperature and a higher density, so that the air-conditioning wind carrying leaked refrigerant can be gathered on the lower side of the indoor space, thereby reducing the probability of the refrigerant contacting the electronic control system.

[0121] In some embodiments, the controller 9 presets a predetermined swing frequency V3 for the second air guide plate 24. When the controller 9 controls the second air guide plate 24 to swing at the predetermined swing frequency V3, the air supplied by the indoor unit 2 can be evenly distributed horizontally within the indoor space. This prevents the indoor unit 2 from continuously supplying air to a fixed location, which could cause an increase in refrigerant concentration at that location and pose a safety hazard.

[0122] In some embodiments, during the swinging of the second air deflector 24 at the preset swing frequency V3, the second air deflector 24 swings in a first direction to a first limit angle and maintains this angle for a first preset time T1, and then swings in a second direction to a second limit angle and maintains this angle for a second preset time T2. The first direction and the second direction are parallel to the longitudinal direction of the indoor unit 2 (i.e., the left-right direction as shown in FIG8 ), and the second direction is opposite to the first direction.

[0123] For example, the second air guide plate 24 swings toward the left side of the indoor unit 2 in the length direction to the first extreme angle, and maintains the air supply at this angle within the first preset time T1, and then swings toward the right side of the indoor unit 2 to the second extreme angle, and maintains the air supply at this angle within the second preset time T2, so that the air supply of the indoor unit 2 is evenly distributed in the horizontal direction of the indoor space, avoiding the air conditioning air carrying refrigerant from being continuously supplied to a fixed position, causing the refrigerant concentration at the fixed position to increase, posing a safety hazard.

[0124] It should be noted that the first preset time T1 and the second preset time T2 are values ​​preset in the controller 9 and can be calculated based on the structural properties of the air conditioner 1000 or tested based on experimental results. The present disclosure does not impose any restrictions on this.

[0125] In some embodiments, during operation of the air conditioner 1000, the second air guide plate 24 is further configured to periodically oscillate along the longitudinal direction of the indoor unit 2 to uniformly distribute the air supplied by the indoor unit 2 in the horizontal direction of the indoor space. One cycle of the periodic oscillation comprises the second air guide plate 24 oscillating from an initial position along the first direction to the first limit angle, then along the second direction to the second limit angle, and then along the first direction to the initial position.

[0126] For example, during the process of the second air guide plate 24 swinging at the preset swing frequency V3, the second air guide plate 24 swings periodically along the longitudinal direction of the indoor unit 2. That is, the second air guide plate 24 swings from the initial position along the first direction to the first limit angle and maintains the position for the first preset time T1, then swings along the second direction to the second limit angle and maintains the position for the second preset time T2, then swings along the first direction through the initial position, again to the first limit angle and again maintains the position for the first preset time T1.

[0127] Those skilled in the art will understand that the scope of the present invention is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. An air conditioner, comprising: Indoor heat exchanger; outdoor heat exchanger; compressor; a concentration sensor configured to detect a concentration value of a refrigerant in the room; a control device configured to send an instruction signal; as well as The controller is configured as: Obtaining a concentration value of the refrigerant detected by the concentration sensor; When the concentration value is greater than or equal to a preset first concentration threshold and the indoor heat exchanger operates as an evaporator, controlling the compressor to operate at a preset target operating frequency; and When the instruction signal from the control device is received, only the instruction signal for instructing the air conditioner to turn on or off among the instruction signals is executed. 2 . The air conditioner according to claim 1 , wherein the control device is further configured to prompt a user that the air conditioner is in a refrigerant leakage state when the concentration value of the refrigerant is greater than or equal to the preset first concentration threshold.

3. The air conditioner according to claim 1 or 2, further comprising: Expansion valve; as well as a first solenoid valve, disposed on a pipeline between the expansion valve and the indoor heat exchanger; The controller is further configured to control the first solenoid valve to close when the concentration value is greater than or equal to the first concentration threshold.

4. The air conditioner according to claim 1, further comprising: A fresh air fan is configured to transport outdoor air into the room; as well as an indoor fan configured to transport air in the indoor unit to the indoor room; In which, the controller is also configured to control the indoor fan to operate at an operating speed greater than or equal to a first preset speed, and control the fresh air fan to operate at an operating speed greater than or equal to a second preset speed when the concentration value of the refrigerant is greater than or equal to the first concentration threshold.

5. The air conditioner according to claim 4, further comprising: throttle; and air valve; Wherein, the controller is further configured to control the damper and the air valve to be in a maximum air outlet state when the concentration value of the refrigerant is greater than or equal to the first concentration threshold.

6. The air conditioner according to claim 4 or 5, wherein: The controller is further configured to control the fresh air fan to operate at an operating speed that is twice the second preset speed when the concentration value of the refrigerant is greater than or equal to the first concentration threshold.

7. The air conditioner according to any one of claims 4 to 6, wherein: The controller is further configured to control the indoor fan to operate at an operating speed that is 1.5 times the first preset speed when the concentration value of the refrigerant is greater than or equal to the first concentration threshold.

8. The air conditioner according to any one of claims 4 to 7, wherein: The controller is further configured to control the indoor fan and the fresh air fan to reduce their operating speeds to 0 when the concentration value of the refrigerant is less than or equal to a preset dilution concentration value and is maintained for a preset time.

9. The air conditioner according to claim 8, wherein The controller is also configured to control the operating speed of the fresh air fan to be reduced to 0 at a first rate, and to control the operating speed of the indoor fan to be reduced to 0 at a second rate during the process of the controller controlling the indoor fan and the fresh air fan to reduce the operating speed to 0.

10. The air conditioner according to claim 1, further comprising an indoor unit, wherein the indoor unit comprises: air outlet; at least one first air guide plate, disposed at the air outlet and extending along the length direction of the indoor unit; as well as at least one second air guide plate, disposed at the air outlet and extending along a height direction of the indoor unit; In which, the controller is also configured to control the at least one first air guide plate to rotate to a preset air supply angle when the concentration value of the refrigerant is greater than or equal to the first concentration threshold, and control the at least one second air guide plate to swing at a preset swing frequency so that the air-conditioned air blown out from the air outlet is distributed in the lower part of the indoor space.

11. The air conditioner according to claim 10, wherein The indoor unit includes at least two first air guide plates, which are arranged at intervals along the height direction of the indoor unit, and the at least two first air guide plates are configured to rotate to adjust the air outlet angle of the indoor unit in the vertical direction of the indoor space.

12. The air conditioner according to claim 11, wherein The indoor unit includes at least two second air guide plates, which are arranged between any two of the first air guide plates and are spaced apart along the length direction of the indoor unit. The second air guide plates are configured to rotate to adjust the air outlet angle of the indoor unit in the horizontal direction of the indoor space.

13. The air conditioner according to any one of claims 10 to 12, further comprising an electronic control system; in, When the first air guide plate rotates to the preset air supply angle, the conditioned air blown out from the air outlet directly blows toward the lower part of the indoor space.

14. The air conditioner according to any one of claims 10 to 13, wherein: During the swinging of the second air deflector at the preset swing frequency, the second air deflector swings in the first direction to a first limit angle and maintains the swing angle for a first preset time, and then swings in the second direction to a second limit angle and maintains the swing angle for a second preset time; The first direction and the second direction are parallel to the length direction of the indoor unit, and the second direction is opposite to the first direction.

15. The air conditioner according to any one of claims 3 to 14, wherein: The first solenoid valve is configured to regulate the flow rate of the flowing medium in the pipeline between the expansion valve and the indoor heat exchanger; The air conditioner further includes a first stop valve, which is disposed on a pipeline between the first solenoid valve and the indoor heat exchanger and is configured to cut off and throttle a flow medium in the pipeline between the first solenoid valve and the indoor heat exchanger.

16. The air conditioner according to claim 15, wherein The air conditioner further includes a four-way valve, the indoor heat exchanger and the outdoor heat exchanger are respectively connected to the compressor via the four-way valve, the four-way valve includes a first valve port, a second valve port, a third valve port and a fourth valve port, and the compressor includes an air intake port connected to the first valve port and an air discharge port connected to the third valve port; When the indoor heat exchanger works as an evaporator, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port; When the indoor heat exchanger operates as a condenser, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port.

17. The air conditioner according to claim 16, wherein The air conditioner further comprises: a second solenoid valve, which is disposed on a pipeline between the four-way valve and the indoor heat exchanger and is configured to regulate the flow rate of a flowing medium in the pipeline between the four-way valve and the indoor heat exchanger, and A second stop valve is provided on the pipeline between the second solenoid valve and the indoor heat exchanger and is configured to cut off and throttle the flow medium in the pipeline between the second solenoid valve and the indoor heat exchanger.

18. The air conditioner according to claim 17, wherein The indoor heat exchanger includes a first connecting port and a second connecting port, the first connecting port is connected to the first stop valve, and the second connecting port is connected to the second stop valve; the outdoor heat exchanger includes a third connecting port and a fourth connecting port, the third connecting port is connected to the expansion valve, and the fourth connecting port is connected to the four-way valve.

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