Air conditioner, control method and device of air conditioner, controller, medium and product

Abstract

The invention discloses an air conditioner, a control method and device of the air conditioner, a controller, a medium and a product, and relates to the technical field of electric appliances. The air conditioner comprises an indoor unit, and the indoor unit can comprise an indoor unit shell, an inner fan and an air inlet baffle assembly. A containing cavity, an air inlet, an air outlet and an air outlet are formed in the inner machine shell, and the air inlet, the air outlet and the air outlet are communicated with the containing cavity in an air channel mode. The inner fan is located in the containing cavity, the air inlet baffle assembly is located at the air inlet, and when the air outlet is closed, the inner fan works to guide airflow at the air inlet to the air outlet. When the air inlet baffle assembly seals the air inlet, the inner fan works to exhaust airflow entering from the air outlet to the outside through the air outlet. Therefore, under the condition that flammable refrigerant leaks indoors, the leaked refrigerant can be discharged out of the room through the exhaust outlet, and the operation safety coefficient of the air conditioner is improved.

Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and in particular to an air conditioner, a control method, a device, a controller, a medium and a product of the air conditioner. Background Art

[0002] The refrigerant in the air conditioner is mainly used to absorb and release heat. For example, when the refrigerant vaporizes in the air conditioner's evaporator, it absorbs the surrounding heat and cools the indoor air. Alternatively, when the refrigerant condenses in the air conditioner's condenser, it releases heat and is discharged through the outdoor unit.

[0003] The refrigerants commonly used at present include new refrigerants such as R410A, R32, and R290. However, since some refrigerants are flammable and air conditioners are usually used in a relatively closed indoor environment, if the refrigerant gas leaks in the indoor environment or in the outdoor unit, there may be a risk of electric sparks and explosions during the operation of the air conditioner, which greatly reduces the operating safety factor of the air conditioner. Summary of the invention

[0004] In view of the technical problem of low operating safety factor of air conditioners with flammable refrigerants, the present invention is proposed to provide an air conditioner, a control method, device, controller, medium and product for the air conditioner that overcomes the above problem or at least partially solves the above problem.

[0005] Based on the first aspect of the present invention, an air conditioner is provided, the air conditioner comprising an indoor unit, the indoor unit comprising:

[0006] An inner casing, wherein a housing, an air inlet, an air outlet and an exhaust port are provided in the inner casing, wherein the air inlet, the air outlet and the exhaust port are respectively connected to the housing cavity through an air path;

[0007] An internal fan, the internal fan being located in the accommodating cavity;

[0008] An air inlet baffle assembly, the air inlet baffle assembly is located at the air inlet, wherein when the air outlet is closed, the internal fan works to guide the airflow at the air inlet to the air outlet;

[0009] When the air inlet baffle assembly closes the air inlet, the internal fan operates to discharge the airflow entering the air outlet to the outside through the air outlet.

[0010] In an optional invention, the indoor unit further includes:

[0011] An indoor controller, the indoor controller is electrically connected to the indoor fan and to the air inlet baffle assembly;

[0012] A first refrigerant sensor, wherein the first refrigerant sensor is located in the accommodating cavity, and the first refrigerant sensor is electrically connected to the indoor controller, wherein the indoor controller adjusts the working state of the indoor fan and the air inlet baffle assembly according to the first refrigerant concentration detected by the first refrigerant sensor.

[0013] An optional invention content, the air conditioner includes an outdoor unit, and the outdoor unit includes:

[0014] An external machine controller, the external machine controller is electrically connected to the internal machine controller;

[0015] A battery, the battery is electrically connected to the external controller to supply power to the external controller;

[0016] a second refrigerant sensor, the second refrigerant sensor being electrically connected to the external unit controller;

[0017] The external fan is electrically connected to the external controller, and the external controller adjusts the working state of the external fan according to the second refrigerant concentration detected by the second refrigerant sensor.

[0018] Based on the second aspect of the present invention, a control method of an air conditioner is further provided, wherein the air conditioner comprises the air conditioner as described in any one of the above invention contents, and the control method comprises:

[0019] In response to the indoor unit self-check instruction, the air inlet baffle assembly is controlled to move so as to close the air inlet of the indoor unit;

[0020] Driving the internal fan to operate so as to discharge the airflow entering the air outlet to the outside through the air outlet;

[0021] When it is detected that the target leakage condition is met, the air inlet baffle assembly and the internal fan are driven to execute the refrigerant emptying strategy and adjust to the air conditioning locked state, wherein an alarm is issued when in the air conditioning locked state and response instructions are prohibited.

[0022] An optional invention content, driving the air inlet baffle assembly and the internal fan to execute the refrigerant exhaust strategy includes:

[0023] Controlling the movement of the air inlet baffle assembly to seal the air inlet of the indoor unit;

[0024] The indoor fan is driven to run for a set exhaust time to discharge the refrigerant leaked from the indoor unit to the outside through the exhaust port.

[0025] In an optional invention, the control method includes:

[0026] After the set emptying time has elapsed, obtaining a first refrigerant concentration detected by the first refrigerant sensor;

[0027] If the first refrigerant concentration does not meet the first concentration condition, releasing the air conditioner lock state;

[0028] If the first refrigerant concentration meets a first concentration condition, the air conditioner power-off operation is performed.

[0029] An optional invention content, the alarming when the air conditioner is in a locked state, includes:

[0030] Providing a display interface, inputting the alarm information into the display interface for display; and / or,

[0031] Drive the buzzer to alarm.

[0032] In an optional invention, the control method includes:

[0033] In the case where it is detected that the target leakage condition is not met, or in the case where it responds to the air conditioner shutdown instruction, in response to the outdoor unit self-check instruction, obtaining the second refrigerant concentration detected by the second refrigerant sensor;

[0034] When the concentration of the second refrigerant satisfies a second concentration condition, driving the operating frequency of the compressor of the outdoor unit to stop when the operating frequency drops to a lower limit operating frequency;

[0035] Adjust to the air conditioning restriction state, and control the outdoor fan to run for the second preset time according to the set gear. When in the air conditioning restriction state, an alarm is issued, and only the air conditioning shutdown command and the air supply mode command are responded to.

[0036] In an optional invention, the control method includes:

[0037] After the second preset time has passed, re-obtaining the second refrigerant concentration;

[0038] If the second refrigerant concentration does not meet the second concentration condition, releasing the air conditioning restriction state;

[0039] If the second refrigerant concentration meets the second concentration condition, the air conditioning operation mode is adjusted to the air supply mode.

[0040] In an optional invention, the control method further includes:

[0041] In response to an operation self-check instruction, acquiring air conditioner operation data, wherein the operation self-check instruction is generated during the operation of the air conditioner;

[0042] When it is determined that the air conditioner operation data meets the set leakage condition, determining that the air conditioner has a leakage;

[0043] The operating frequency of the compressor driving the outdoor unit stops when it drops to the lower limit operating frequency, the outdoor fan is controlled to run for a second preset time according to the set gear, and a self-check instruction for the indoor unit is generated.

[0044] In an optional invention, the determining whether the air conditioner operation data meets a set leakage condition includes:

[0045] If the operating frequency of the compressor is greater than or equal to the abnormal frequency threshold, and the temperature change rate of the compressor exhaust is greater than or equal to the preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the start-up pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the start-up pipe temperature of the condenser is less than or equal to the second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition; or,

[0046] If the exhaust temperature of the compressor is greater than or equal to the set temperature threshold, and the temperature change rate of the compressor exhaust is greater than or equal to the preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the startup pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the startup pipe temperature of the condenser is less than or equal to the second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition.

[0047] According to a third aspect of the present invention, there is further provided a control device for an air conditioner, the air conditioner comprising the air conditioner as described in any one of the above invention contents, the control device comprising:

[0048] A component control module, for controlling the air inlet baffle component to move in response to an indoor unit self-check instruction, so as to seal the air inlet of the indoor unit;

[0049] A first driving module is used to drive the internal fan to run for a first preset time to discharge the airflow entering the air outlet to the outside through the air outlet;

[0050] The risk response module is used to drive the air inlet baffle assembly 3 and the internal fan 2 to execute the refrigerant exhaust strategy and adjust to the air-conditioning locked state when the target leakage condition is detected. When in the air-conditioning locked state, an alarm is issued and response instructions are prohibited.

[0051] Based on the fourth aspect of the present invention, there is also provided an indoor controller, comprising:

[0052] one or more processors;

[0053] Memory;

[0054] One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute any of the methods described in the above invention.

[0055] Based on the fifth aspect of the present invention, a computer-readable storage medium is also provided, which stores a computer program used in conjunction with an electronic device, characterized in that the computer program can be executed by a processor to perform any of the methods described in the above invention content.

[0056] Based on the sixth aspect of the present invention, a computer program product is also provided, including a computer program / computer executable instructions, characterized in that the computer program / computer executable instructions, when executed by a processor in an internal machine controller, implements any method described in the above invention contents.

[0057] Compared with the prior art, the present invention includes an indoor unit, which may include an inner housing, an inner fan and an air inlet baffle assembly. The inner housing is provided with a housing cavity, an air inlet, an air outlet and an exhaust port, wherein the air inlet, the air outlet and the exhaust port are respectively connected to the housing cavity by an air path. The inner fan is located in the housing cavity, and the air inlet baffle assembly is located at the air inlet, wherein when the exhaust port is closed, the inner fan works to guide the airflow at the air inlet to the air outlet. When the air inlet baffle assembly closes the air inlet, the inner fan works to discharge the airflow entering the air outlet to the outside through the exhaust port. As a result, in the event of a flammable refrigerant leaking indoors, the leaked refrigerant can be discharged to the outside through the exhaust port, thereby improving the operating safety factor of the air conditioner.

[0058] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0060] In the attached picture:

[0061] Figure 1 is a first structural schematic diagram of an indoor unit provided by an embodiment of the present invention;

[0062] Figure 2 is a second structural schematic diagram of an indoor unit provided by an embodiment of the present invention;

[0063] Figure 3 is a structural schematic diagram of an air inlet baffle assembly provided by an embodiment of the present invention;

[0064] Figure 4 is a partial structural schematic diagram of an air inlet baffle assembly provided by an embodiment of the present invention;

[0065] Figure 5 is an electrical connection block diagram of an air conditioner provided by an embodiment of the present invention;

[0066] Figure 6 is a schematic flow chart of steps of a method for controlling an air conditioner provided by an embodiment of the present invention;

[0067] Figure 7 is a schematic flow chart of steps of another air conditioner control method provided by an embodiment of the present invention;

[0068] Figure 8 is a schematic flow chart of steps of another method for controlling an air conditioner provided by an embodiment of the present invention;

[0069] Fig. 9 is a structural block diagram of a control device for an air conditioner provided by an embodiment of the present invention;

[0070] Figure numerals: 1. Inner machine housing; 101. Accommodating cavity; 102. Air inlet; 103. Air outlet; 104. Exhaust outlet; 2. Inner fan; 3. Air inlet baffle assembly; 31. Air inlet motor; 32. Connecting rod; 33. Air inlet baffle; 4. Inner machine controller; 5. First refrigerant sensor; 6. External machine controller; 7. Battery; 8. Second refrigerant sensor; 9. External fan. DETAILED DESCRIPTION

[0071] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0072] The refrigerant in the air conditioner is mainly used to absorb and release heat. For example, when the refrigerant vaporizes in the air conditioner's evaporator, it absorbs the surrounding heat and cools the indoor air. Alternatively, when the refrigerant condenses in the air conditioner's condenser, it releases heat and is discharged through the outdoor unit.

[0073] The refrigerants commonly used at present include new refrigerants such as R410A, R32, and R290. However, since some refrigerants are flammable and air conditioners are usually used in a relatively closed indoor environment, if the refrigerant gas leaks in the indoor environment or in the outdoor unit, there may be a risk of electric sparks and explosions during the operation of the air conditioner, which greatly reduces the operating safety factor of the air conditioner.

[0074] Based on the above technical problems, an embodiment of the present invention is proposed. The embodiment of the present invention may include an indoor unit, and the indoor unit may include an inner unit housing 1, an inner fan 2, and an air inlet baffle assembly 3. The inner unit housing 1 is provided with a housing cavity 101, an air inlet 102, an air outlet 103, and an exhaust port 104, wherein the air inlet 102, the air outlet 103, and the exhaust port 104 are respectively connected to the housing cavity 101 by an air path. The inner fan 2 is located in the housing cavity 101, and the air inlet baffle assembly 3 is located at the air inlet 102, wherein when the exhaust port 104 is closed, the inner fan 2 works to guide the airflow at the air inlet 102 to the air outlet 103. When the air inlet baffle assembly 3 closes the air inlet 102, the inner fan 2 works to discharge the airflow entering the air outlet 103 to the outside through the exhaust port 104. Therefore, when the flammable refrigerant leaks indoors, the leaked refrigerant can be discharged outdoors through the exhaust port 104, thereby improving the operating safety factor of the air conditioner.

[0075] Reference Figure 1-5 As shown, an embodiment of the present invention discloses an air conditioner, which may include an indoor unit, and the indoor unit may include an inner unit housing 1, an inner fan 2, and an air inlet baffle assembly 3, wherein the inner unit housing 1 is provided with a housing cavity 101, an air inlet 102, an air outlet 103, and an exhaust port 104, wherein the air inlet 102, the air outlet 103, and the exhaust port 104 are respectively connected to the housing cavity 101 by air paths. The inner fan 2 is located in the housing cavity 101, and the air inlet baffle assembly 3 is located at the air inlet 102, wherein when the exhaust port 104 is closed, the inner fan 2 works to guide the airflow at the air inlet 102 to the air outlet 103. When the air inlet baffle assembly 3 closes the air inlet 102, the inner fan 2 works to discharge the airflow entering the air outlet 103 to the outside through the exhaust port 104.

[0076] In an embodiment of the present invention, the indoor unit of the air conditioner includes an inner housing 1, an inner fan 2, and an air inlet baffle assembly 3, wherein the inner housing 1 may be provided with a housing cavity 101 for accommodating relevant structural components of the indoor unit. For example, the inner fan 2 is installed in the housing cavity 101, and the evaporator of the indoor unit is also installed in the housing cavity 101. An air outlet 103 is provided at the bottom or side of the inner housing 1, and an air inlet 102 is provided at the top of the inner housing 1. The air inlet baffle assembly 3 is disposed at the air inlet 102 for opening or closing the air inlet 102. Figure 2 As shown, the air inlet baffle assembly 3 is actuated to open the air inlet 102, and when the internal fan 2 rotates forward, the airflow at the air inlet 102 can be sucked into the accommodating cavity 101, and then enters the indoor environment from the air outlet 103, thereby achieving heat exchange between the airflow in the indoor environment and the evaporator. The internal fan 2 can be a cross-flow fan, etc., which is not limited here.

[0077] The exhaust port 104 may be disposed on the end surface of the inner housing 1 close to the hanging wall. For example, the indoor unit may further include an exhaust pipe, one end of which is connected to the exhaust port 104 and the other end of which extends to the outside. Figure 1 As shown, the air inlet baffle assembly 3 is actuated to close the air inlet 102, and when the internal fan 2 is reversed, the airflow in the room can be sucked into the accommodating cavity 101 through the air outlet 103, and sent into the exhaust pipe through the air outlet 104, and then discharged outdoors. Therefore, in the event of a flammable refrigerant leaking indoors, the refrigerant leaking indoors can be discharged outdoors through the air outlet 104, thereby improving the operating safety factor of the air conditioner and avoiding the problem of explosion risk caused by excessive concentration of refrigerant leakage.

[0078] In an optional embodiment of the invention, referring to Figure 3 and Figure 4 As shown, the air inlet baffle assembly 3 may include an air inlet motor 31, a connecting rod 32 and an air inlet baffle 33, wherein the connecting rods 32 are respectively provided on both sides of the air inlet baffle 33. The connecting rod 32 is hinged with the air inlet baffle 33, and the air inlet baffle 33 is rotatably connected with the inner housing 1, wherein the connecting rod 32 is fixedly connected with the output shaft of the air inlet motor 31, and the air inlet motor 31 is fixed on the inner housing 1. Thus, the air inlet baffle 33 is pulled to rotate around the inner housing 1 by the rotation of the connecting rod 32, so as to realize the opening or closing of the air inlet 102.

[0079] In an optional embodiment of the invention, referring to Figure 5As shown, the indoor unit may further include an indoor unit controller 4 and a first refrigerant sensor 5. The indoor unit controller 4 is electrically connected to the indoor fan 2 and to the air inlet baffle assembly 3. For example, the indoor unit controller 4 is electrically connected to the air inlet motor 31 in the air inlet baffle assembly 3, so that the air inlet 102 can be closed or opened by controlling the rotation of the air inlet motor 31.

[0080] The first refrigerant sensor 5 is located in the accommodating cavity 101, wherein the type of the first refrigerant sensor 5 is associated with the refrigerant type. For example, when the refrigerant in the air conditioner is R410A, the first refrigerant sensor 5 is an R410A refrigerant sensor, which is used to detect the gas concentration of the R410A refrigerant. The first refrigerant sensor 5 is electrically connected to the indoor controller 4. The indoor controller 4 adjusts the working state of the indoor fan 2 and the air inlet baffle assembly 3 according to the first refrigerant concentration detected by the first refrigerant sensor 5. In some embodiments, if the first refrigerant concentration is high, it can be determined that there is a refrigerant leak in the indoor unit, and the indoor controller 4 can control the air inlet baffle assembly 3 to operate, close the air inlet 102, and control the indoor fan 2 to reverse, so that the leaked refrigerant can be discharged to the outside.

[0081] In an optional embodiment of the invention, referring to Figure 5 As shown, the air conditioner may further include an outdoor unit, and the outdoor unit may include an outdoor unit controller 6, a battery 7, a second refrigerant sensor 8, and an outdoor fan 9. The outdoor unit controller 6 is electrically connected to the indoor unit controller 4, which may also be understood as a communication connection between the outdoor unit controller 6 and the indoor unit controller 4. Thus, the indoor unit controller 4 may send relevant control instructions to the outdoor unit controller 6, and the outdoor unit controller 6 may also send relevant signals back to the indoor unit controller 4.

[0082] The battery 7 is electrically connected to the outdoor controller 6 to supply power to the outdoor controller 6, the second refrigerant sensor 8 is electrically connected to the outdoor controller 6, the outdoor fan 9 is electrically connected to the outdoor controller 6, and the outdoor controller 6 adjusts the working state of the outdoor fan 9 according to the second refrigerant concentration detected by the second refrigerant sensor 8. For example, the battery 7 can be a lithium battery 7. Considering that if there is a refrigerant leak in the outdoor unit, when the indoor controller 4 supplies power to the outdoor unit, the indoor controller 4 controls the relay to be attracted to generate electric sparks, thereby posing a risk of spontaneous combustion and explosion of the outdoor unit. Therefore, the battery 7 can supply power to the outdoor controller 6, so that the second refrigerant concentration inside the outdoor unit detected by the second refrigerant sensor 8 can be obtained through the outdoor controller 6.

[0083] When the second refrigerant concentration is low, it is determined that there is no refrigerant leakage in the outdoor unit, and the outdoor unit controller 6 can transmit the refrigerant detection result to the indoor unit controller 4, and the indoor unit controller 4 then pulls in the relay to power the outdoor unit controller 6 and simultaneously charges the battery 7. When the second refrigerant concentration is high, it is determined that there is a refrigerant leakage in the outdoor unit. At this time, the outdoor unit controller 6 can control the outdoor fan 9 to operate and discharge the refrigerant leaked in the outdoor unit to the outside, thereby avoiding the problem of excessive concentration of refrigerant leakage in the outdoor unit and the risk of explosion.

[0084] In another example, when it is determined that a refrigerant leak occurs in the outdoor unit, the outdoor unit controller 6 can also upload the refrigerant detection result to the indoor unit controller 4, and the indoor unit controller 4 sends a fan operation instruction to the outdoor unit controller 6. Finally, the outdoor unit controller 6 responds to the fan operation instruction and drives the outdoor fan 9 to operate.

[0085] Considering that the density of refrigerant gas is greater than that of air, in the event of refrigerant leakage in the outdoor unit, the refrigerant gas will settle. In order to improve the detection accuracy of the second refrigerant concentration, the second refrigerant sensor 8 can be installed on the inner bottom of the outdoor unit, or on the side close to the inner bottom. The type of the second refrigerant sensor 8 can be consistent with the type of the first refrigerant sensor 5.

[0086] In an optional embodiment of the invention, the indoor unit may further include a solenoid valve installed at the exhaust pipe or the exhaust outlet 104, and the solenoid valve is electrically connected to the indoor unit controller 4, so that the opening and closing of the solenoid valve can also be controlled by the indoor unit controller 4 to open or close the exhaust outlet 104.

[0087] Reference Figure 6 , shows a control method of a controller provided by an embodiment of the present invention, the control method is applied to the indoor controller 4, and the method may include:

[0088] S601. In response to the indoor unit self-check instruction, the air inlet baffle assembly is controlled to operate so as to seal the air inlet of the indoor unit.

[0089] In an embodiment of the present invention, the indoor unit self-check instruction can be understood as an instruction to instruct the indoor unit to detect whether a refrigerant leak occurs. For example, the indoor unit self-check instruction can be generated when the air conditioner is turned on or off. In response to the indoor unit self-check instruction, the air inlet baffle assembly 3 can be controlled to operate to close the air inlet 102. At this time, the indoor unit housing 1 is in a sealed state, and the refrigerant gas in the accommodating cavity 101 will not leak into the indoor environment where the user is located.

[0090] S602: driving the internal fan to operate so as to discharge the airflow entering from the air outlet to the outside through the air outlet.

[0091] In the embodiment of the present invention, the indoor controller 4 drives the indoor fan 2 to operate, thereby exhausting the gas in the indoor housing 1 to the outside, thereby improving the accuracy of subsequent detection of the concentration change of the refrigerant gas concentration in the indoor housing 1. In some embodiments, the indoor fan 2 can be driven to operate for a first preset time, and the first preset time can be understood as the shortest time for completely exhausting the gas in the accommodating cavity 101 to the outside. Those skilled in the art can determine the first preset time according to the space size of the accommodating cavity 101 and the exhaust volume of the indoor fan 2. For example, the first preset time can be 5S (seconds), 7S, and 8S, etc., which are not limited too much here.

[0092] In another example, the indoor fan 2 can be driven to operate until the refrigerant concentration of the indoor fan is detected to be lower than a preset concentration value. The refrigerant concentration in the indoor fan can be detected by a first refrigerant sensor 5, and the first refrigerant concentration detected by the sensor indicates the refrigerant concentration in the indoor unit.

[0093] S603. When it is detected that the target leakage condition is met, the air inlet baffle assembly and the internal fan are driven to execute the refrigerant exhaust strategy, and are adjusted to the air conditioner locked state, wherein an alarm is issued when in the air conditioner locked state, and response instructions are prohibited.

[0094] In an embodiment of the present invention, the target leakage condition can be understood as a condition for determining whether a refrigerant leakage occurs in the air conditioner. For example, the target leakage condition can include a first concentration condition and a second concentration condition. Among them, the first concentration condition can be understood as a relevant condition for determining whether a refrigerant leakage occurs in the indoor unit. The second concentration condition can be understood as a relevant condition for determining whether a refrigerant leakage occurs in the outdoor unit. Regarding the first concentration condition. The first concentration condition may include: the first refrigerant concentration is greater than or equal to the first concentration threshold. The first concentration threshold can be understood as the lower limit concentration value for determining whether a refrigerant leakage occurs in the indoor unit. Those skilled in the art can determine the specific first concentration threshold according to actual design requirements. For example, the first concentration threshold can be 0.038 kilograms per cubic meter, etc., and no excessive restrictions are made here.

[0095] In the case where it is detected that the air conditioner does not meet the target leakage condition, it is determined that there is no refrigerant leakage in the indoor unit, and the air conditioner can respond to user instructions and operate normally.

[0096] When it is detected that the air conditioner meets the target leakage condition, it is determined that there is a refrigerant leak in the indoor unit, and the air inlet baffle assembly 3 and the indoor fan 2 are driven to execute the refrigerant emptying strategy, and adjusted to the air conditioner locked state, wherein an alarm is issued when in the air conditioner locked state, and response instructions are prohibited. For example, the refrigerant emptying strategy refers to a related strategy for controlling the working state of the air inlet baffle assembly 3 and the working state of the indoor fan 2 to empty the refrigerant leaked from the indoor unit. Among them, the prohibition of responding to instructions when the air conditioner is in the air conditioner locked state can be understood as not responding to any control instructions (also referred to as user instructions) issued by the user based on the user terminal, remote control, etc. In this way, the risk of explosion caused by sparks generated during normal operation of the indoor unit after a refrigerant leak occurs can be avoided. At the same time, an alarm can also be issued when in the air conditioner locked state. In some embodiments, the method of making an alarm may include at least one of the following:

[0097] First, a fault mark (also called a fault code) corresponding to the refrigerant leakage of the indoor unit is matched as an alarm message. A display interface is provided. For example, the indoor unit also includes an indoor unit display panel electrically connected to the indoor unit controller 4, and the alarm message can be sent to the display interface of the indoor unit display panel for display. Thus, the user can give feedback to the air conditioner maintenance personnel based on the fault mark, and the air conditioner maintenance personnel can come to the door for repair.

[0098] Second, the indoor unit may also include a buzzer, which is electrically connected to the indoor unit controller 4, so that the indoor unit controller 4 can drive the buzzer to work and produce sound for alarm, thereby reminding the user of refrigerant leakage, making it convenient for the user to feedback to the air conditioner maintenance personnel and notify the air conditioner maintenance personnel to come to the door for repair.

[0099] In summary, the embodiment of the present invention can first respond to the indoor unit self-check instruction, control the air inlet baffle assembly 3 to operate, so as to close the air inlet 102 of the indoor unit, and then drive the indoor fan 2 to run for a first preset time to discharge the airflow entering the air outlet 103 to the outside through the exhaust port 104. Then, the first refrigerant concentration detected by the first refrigerant sensor 5 is obtained, and when the first refrigerant concentration meets the first concentration condition, it is determined that there is a refrigerant leak in the indoor unit, and the air inlet baffle assembly 3 and the indoor fan 2 are driven to execute the refrigerant emptying strategy, and adjusted to the air conditioner locking state, wherein an alarm is issued when in the air conditioner locking state, and the response command is prohibited. Therefore, when the flammable refrigerant leaks indoors, the leaked refrigerant can be quickly discharged outdoors, and the air conditioner locking alarm is issued, so that the risk of explosion caused by excessive leakage concentration can be avoided on the basis of timely reminding the user of the refrigerant leakage, thereby improving the operating safety factor of the air conditioner.

[0100] Reference Figure 7 , shows another control method of a controller provided by an embodiment of the present invention, the method may include:

[0101] S701. In response to an air conditioner power-on instruction, generate an indoor unit self-check instruction.

[0102] S702: In response to the indoor unit self-check instruction, the air inlet baffle assembly is controlled to operate so as to seal the air inlet of the indoor unit.

[0103] In the embodiment of the present invention, the air conditioner start-up instruction can be understood as an instruction to start the operation of the air conditioner, which can be generated based on the user's operation on the remote control, or based on the user's operation on the user terminal. After receiving the air conditioner start-up instruction, the indoor controller 4 generates an indoor self-test instruction. The indoor self-test instruction can be understood as an instruction to instruct the indoor unit to detect whether a refrigerant leak occurs. Therefore, when the air conditioner is started, a self-test can be performed first to determine whether the refrigerant is leaking, thereby improving the reliability and safety factor of the air conditioner during operation.

[0104] The indoor unit controller 4 can control the air inlet baffle assembly 3 to operate in response to the indoor unit self-test instruction to close the air inlet 102. At this time, the indoor unit housing 1 is in a sealed state, and the refrigerant gas in the accommodating cavity 101 will not leak into the indoor environment where the user is located.

[0105] S703: Drive the internal fan to run for a first preset time to discharge the airflow entering the air outlet to the outside through the air outlet.

[0106] In the embodiment of the present invention, the first preset time can be understood as the shortest time for the gas in the accommodating cavity 101 to be completely discharged to the outside. Therefore, after the indoor controller 4 drives the indoor fan 2 to run for the first preset time, it can be determined that the gas in the indoor housing 1 is completely exhausted, thereby improving the accuracy of the subsequent detection of the concentration change of the refrigerant gas concentration in the indoor housing 1. Those skilled in the art can determine the first preset time according to the space size of the accommodating cavity 101 and the exhaust volume of the indoor fan 2. For example, the first preset time can be 5S (seconds), 7S, and 8S, etc., and no excessive restrictions are made here.

[0107] S704: Obtain a first refrigerant concentration detected by the first refrigerant sensor.

[0108] In the embodiment of the present invention, the description of step S704 refers to the description of step S603.

[0109] S705: Determine whether the first refrigerant concentration meets a first concentration condition.

[0110] In the embodiment of the present invention, the first concentration condition can be understood as a relevant condition for determining whether a refrigerant leakage occurs in the indoor unit. For example, the first concentration condition may include: the first refrigerant concentration is greater than or equal to the first concentration threshold. The first concentration threshold can be understood as the lower limit concentration value for determining whether a refrigerant leakage occurs in the indoor unit. Those skilled in the art can determine the specific first concentration threshold according to actual design requirements. For example, the first concentration threshold can be 0.038 kilograms per cubic meter, etc., and no excessive restrictions are made here.

[0111] If the first refrigerant concentration is less than the first concentration threshold, it is determined that the first refrigerant concentration does not meet the first concentration condition. At this time, it is determined that there is no refrigerant leakage in the indoor unit, and the refrigerant detection of the outdoor unit can be performed, thereby executing the following step S707.

[0112] If the first refrigerant concentration is greater than or equal to the first concentration threshold, it is determined that the first refrigerant concentration meets the first concentration condition, and it is determined that there is a refrigerant leak in the indoor unit, thereby executing the following step S706.

[0113] S706, determining that there is a refrigerant leak in the indoor unit, driving the air inlet baffle assembly and the indoor fan to execute the refrigerant exhaust strategy, and adjusting to the air conditioner locked state, wherein an alarm is issued when in the air conditioner locked state, and response instructions are prohibited.

[0114] In an embodiment of the present invention, the refrigerant exhaust strategy refers to a strategy for controlling the working state of the air inlet baffle assembly 3 and the working state of the indoor fan 2 to exhaust the refrigerant leaked from the indoor unit. Among them, the air conditioner is prohibited from responding to instructions when it is in the air conditioning locked state, which can be understood as not responding to control instructions (also referred to as user instructions) issued by the user based on the user terminal, remote control, etc. In this way, the risk of explosion caused by sparks generated during normal operation of the indoor unit after a refrigerant leak occurs can be avoided. At the same time, an alarm can also be issued when the air conditioning is in the locked state. In some embodiments, the method of issuing an alarm may include at least one of the following:

[0115] First, a fault mark (also called a fault code) corresponding to the refrigerant leakage of the indoor unit is matched as an alarm message. A display interface is provided. For example, the indoor unit also includes an indoor unit display panel electrically connected to the indoor unit controller 4, and the alarm message can be sent to the display interface of the indoor unit display panel for display. Thus, the user can give feedback to the air conditioner maintenance personnel based on the fault mark, and the air conditioner maintenance personnel can come to the door for repair.

[0116] Second, the indoor unit may also include a buzzer, which is electrically connected to the indoor unit controller 4, so that the indoor unit controller 4 can drive the buzzer to work and produce sound for alarm, thereby reminding the user of refrigerant leakage, making it convenient for the user to feedback to the air conditioner maintenance personnel and notify the air conditioner maintenance personnel to come to the door for repair.

[0117] Therefore, if flammable refrigerant leaks indoors, the leaked refrigerant can be quickly discharged outdoors and the air conditioner lock alarm can be sounded, thereby promptly reminding the user of refrigerant leakage and avoiding the risk of explosion due to excessive leakage concentration, thereby improving the operating safety factor of the air conditioner.

[0118] In an optional embodiment of the invention, driving the air inlet baffle assembly 3 and the internal fan 2 to execute the refrigerant exhaust strategy may include:

[0119] The air inlet baffle assembly 3 is controlled to move so as to close the air inlet 102 of the indoor unit.

[0120] The indoor fan 2 is driven to run for a set exhaust time to discharge the refrigerant leaked from the indoor unit to the outside through the exhaust port 104.

[0121] In an embodiment of the present invention, the air inlet baffle assembly 3 is controlled to operate to close the air inlet 102, thereby changing the airflow path in the indoor unit, facilitating the discharge of the refrigerant gas in the indoor unit to the outdoors, and avoiding safety hazards caused by excessive concentration of refrigerant gas in the indoor unit. The set emptying time refers to the pre-set time for emptying the refrigerant gas leaking from the indoor fan 2. For example, the set emptying time can be 7S, 10S, 12S, and 15S, which can be associated with the amount of refrigerant in the circulation pipeline, and is not limited in detail here.

[0122] In another preferred embodiment, after the set emptying time has elapsed, the control method may further include reacquiring the first refrigerant concentration and determining whether the first refrigerant concentration satisfies the first concentration condition. That is, the above steps S704 and S705 may be repeatedly executed.

[0123] If the first refrigerant concentration does not meet the first concentration condition, it is determined that there is no refrigerant leakage in the indoor unit, and it is determined that the cause of the previously detected leaked refrigerant gas is mainly due to: long-term operation of the air conditioner, a small amount of refrigerant overflow caused by corrosion or external force in the circulation pipeline or connection. This overflowed refrigerant gas is not enough to cause a safety hazard, so after executing the refrigerant emptying strategy, the operating safety factor of the air conditioner can be guaranteed, thereby releasing the air conditioner lock state, releasing the alarm and normal response instructions.

[0124] If the first refrigerant concentration meets the first concentration condition, it is determined that there is a refrigerant leak in the indoor unit. Long-term leakage may cause safety hazards. At this time, the air conditioner power-off operation can be performed to remind the user to find an air conditioner maintenance personnel for maintenance, thereby avoiding the risk of electric sparks and explosions caused by the air conditioner being powered on.

[0125] S707 . In response to the external unit self-check instruction, obtain the second refrigerant concentration detected by the second refrigerant sensor 8 .

[0126] In the embodiment of the present invention, the outdoor unit self-check instruction can be understood as an instruction to instruct the outdoor unit to detect whether a refrigerant leak occurs. In the case where the indoor unit self-checks that there is no refrigerant leak, the indoor unit controller 4 can generate an outdoor unit self-check instruction, and in response to the outdoor unit self-check instruction, obtain the second refrigerant concentration detected by the second refrigerant sensor 8. The second refrigerant refers to the refrigerant concentration in the outdoor unit.

[0127] S708: When the second refrigerant concentration satisfies a second concentration condition, the operating frequency of the compressor of the outdoor unit is driven to stop when it drops to a lower limit operating frequency.

[0128] S709, adjust to the air conditioning restriction state, and control the outdoor fan to run for a second preset time according to the set gear, wherein an alarm is issued when in the air conditioning restriction state, and only responds to the air conditioning shutdown command and the air supply mode command.

[0129] In an embodiment of the present invention, the second refrigerant condition can be understood as a relevant condition for determining whether a refrigerant leak occurs in the outdoor unit. For example, the second refrigerant condition may include: the second refrigerant concentration is greater than or equal to a second concentration threshold, wherein the second concentration threshold can be understood as a lower limit concentration value for determining a refrigerant leak occurs in the outdoor unit. Those skilled in the art can determine a specific second concentration threshold according to actual design requirements. For example, the second concentration threshold can be 0.038 kilograms per cubic meter, etc., which is not limited here. In some preferred embodiments, the second concentration threshold can be consistent with the first concentration threshold.

[0130] When the second refrigerant concentration does not meet the second concentration condition, it is determined that there is no refrigerant leakage in the outdoor unit, and thus the air conditioner can be started normally. For example, the indoor unit controller 4 pulls in a relay to supply power to the outdoor unit. The air inlet damper assembly 3 is controlled to open the air inlet 102 and close the air outlet 104, the indoor fan 2 is started, and the cooling or heating mode is operated.

[0131] When the second refrigerant concentration meets the second concentration condition, it is determined that there is a refrigerant leak in the outdoor unit, and the indoor unit controller 4 drives the compressor of the outdoor unit to reduce the operating frequency of the compressor to the lower limit operating frequency and then stop. The lower limit operating frequency refers to the minimum operating frequency of the compressor. Reducing the operating frequency of the compressor to the lower limit operating frequency is, on the one hand, to reduce the refrigerant circulation rate in the air conditioner to prevent the compressor from being powered off at a higher operating frequency, causing a large change in pressure, causing the circulation pipeline to rupture and increase the amount of refrigerant leakage. On the other hand, after the refrigerant leaks, the compressor needs to do more work to ensure the operating cycle of the air conditioner. As a result, the cylinder of the compressor is prone to heat up. Reducing the operating frequency can protect the compressor and prevent the compressor from overheating.

[0132] When the air conditioner is in the air conditioning restriction state and only responds to the air conditioning shutdown command and the air supply mode command, it can be understood as a partial response to the control command (also called user command) issued by the user based on the user terminal, remote control, etc., and only responds to the following two commands: air conditioning shutdown command and air supply mode command.

[0133] By controlling the external fan 9 to run for the second preset time according to the set gear, the refrigerant leaked in the outdoor unit can be discharged outside the outdoor unit through the external fan 9, thereby effectively reducing the concentration of the refrigerant gas leaked in the outdoor unit, that is, reducing the second refrigerant concentration, avoiding the risk of the outdoor unit exploding due to the generation of electric sparks when the outdoor unit is working due to the refrigerant concentration being too high in the outdoor unit. In some preferred embodiments, the set gear can be the highest gear that the external fan 9 can run. The speed of the external fan 9 can be increased to discharge the refrigerant gas in the outdoor unit at the fastest discharge rate. The second preset time can be understood as the lower limit running time for emptying the refrigerant leaking from the indoor unit. Those skilled in the art can determine the second preset time according to the actual test results. For example, the second preset time can be 3 minutes, 5 minutes, 8 minutes, and 10 minutes, etc., and no excessive restrictions are made here.

[0134] At the same time, the alarm method when the air conditioner is in the air conditioning restriction state can be consistent with the alarm method when the air conditioner is in the air conditioning lock state. The difference therefrom can be that the alarm information includes a fault mark associated with the refrigerant leakage of the outdoor unit.

[0135] In other implementations, if the refrigerant leakage of the indoor unit and the refrigerant leakage of the outdoor unit are regarded as the same type of operating failure of the air conditioner, the fault identifiers of the two may be kept consistent.

[0136] Reference Figure 8 , shows another control method of a controller provided by an embodiment of the present invention, the method may include:

[0137] S801. In response to an air conditioner shutdown instruction, generate an outdoor unit self-check instruction.

[0138] In the embodiment of the present invention, the air conditioner shutdown instruction can be understood as an instruction for instructing the air conditioner to shut down, and the indoor controller 4 generates an outdoor self-check instruction after receiving the air conditioner shutdown instruction. The outdoor self-check instruction can be understood as an instruction for instructing the outdoor unit to detect whether a refrigerant leak occurs, so that the air conditioner can perform a self-check of whether a refrigerant leaks before shutting down, thereby improving the reliability and safety factor of the air conditioner during operation.

[0139] S802 . In response to the external unit self-test instruction, obtain a second refrigerant concentration detected by a second refrigerant sensor.

[0140] In the embodiment of the present invention, the outdoor unit self-check instruction can be understood as an instruction to instruct the outdoor unit to detect whether a refrigerant leak occurs. In the case where the indoor unit self-checks that there is no refrigerant leak, the indoor unit controller 4 can generate an outdoor unit self-check instruction, and in response to the outdoor unit self-check instruction, obtain the second refrigerant concentration detected by the second refrigerant sensor 8. The second refrigerant refers to the refrigerant concentration in the outdoor unit.

[0141] S803: Determine whether the second refrigerant concentration satisfies a second concentration condition.

[0142] In an embodiment of the present invention, the second refrigerant condition can be understood as a relevant condition for determining whether a refrigerant leak occurs in the outdoor unit. For example, the second refrigerant condition may include: the second refrigerant concentration is greater than or equal to a second concentration threshold, wherein the second concentration threshold can be understood as a lower limit concentration value for determining a refrigerant leak occurs in the outdoor unit. Those skilled in the art can determine a specific second concentration threshold according to actual design requirements. For example, the second concentration threshold can be 0.038 kilograms per cubic meter, etc., which is not limited here. In some preferred embodiments, the second concentration threshold can be consistent with the first concentration threshold.

[0143] When the second refrigerant concentration does not satisfy the second concentration condition, it is determined that there is no refrigerant leakage in the outdoor unit, and refrigerant detection of the indoor unit can be performed, thereby executing the following step S806.

[0144] When the second refrigerant concentration satisfies the second concentration condition, it is determined that there is a refrigerant leak in the outdoor unit, and the following step S804 is executed.

[0145] S804: The operating frequency of the compressor driving the outdoor unit stops when it drops to a lower limit operating frequency.

[0146] S805, adjusting to the air conditioning restriction state, and controlling the outdoor fan to run for a second preset time according to the set gear, wherein an alarm is issued when in the air conditioning restriction state, and only responding to the air conditioning shutdown command and the air supply mode command.

[0147] In the embodiment of the present invention, the indoor controller 4 drives the compressor of the outdoor unit to operate, so as to reduce the operating frequency of the compressor to the lower limit operating frequency and then stop. The lower limit operating frequency refers to the minimum operating frequency of the compressor. Reducing the operating frequency of the compressor to the lower limit operating frequency is, on the one hand, to reduce the refrigerant circulation rate in the air conditioner, to prevent the compressor from being powered off at a higher operating frequency, causing a large change in pressure, causing the circulation pipeline to rupture and increase the refrigerant leakage. On the other hand, after the refrigerant leaks, the compressor needs to do more work to ensure the operating cycle of the air conditioner. As a result, the cylinder of the compressor is prone to heat up. Reducing the operating frequency can protect the compressor and prevent the compressor from overheating.

[0148] When the air conditioner is in the air conditioning restriction state and only responds to the air conditioning shutdown command and the air supply mode command, it can be understood as a partial response to the control command (also called user command) issued by the user based on the user terminal, remote control, etc., and only responds to the following two commands: air conditioning shutdown command and air supply mode command.

[0149] By controlling the external fan 9 to run for the second preset time according to the set gear, the refrigerant leaked in the outdoor unit can be discharged outside the outdoor unit through the external fan 9, thereby effectively reducing the concentration of the refrigerant gas leaked in the outdoor unit, that is, reducing the second refrigerant concentration, avoiding the risk of the outdoor unit exploding due to the generation of electric sparks when the outdoor unit is working due to the refrigerant concentration being too high in the outdoor unit. In some preferred embodiments, the set gear can be the highest gear that the external fan 9 can run. The speed of the external fan 9 can be increased to discharge the refrigerant gas in the outdoor unit at the fastest discharge rate. The second preset time can be understood as the lower limit running time for emptying the refrigerant leaking from the indoor unit. Those skilled in the art can determine the second preset time according to the actual test results. For example, the second preset time can be 3 minutes, 5 minutes, 8 minutes, and 10 minutes, etc., and no excessive restrictions are made here.

[0150] In an optional embodiment of the invention, after the second preset time has passed, the control method may further include re-obtaining the second refrigerant concentration and determining whether the second refrigerant concentration satisfies the second concentration condition. That is, the above steps S802 and S803 may be repeatedly executed.

[0151] If the second refrigerant concentration does not meet the second concentration condition, it is determined that there is no refrigerant leakage in the outdoor unit, and it is determined that the cause of the previously detected leaked refrigerant gas is mainly due to: long-term operation of the air conditioner, corrosion of the circulation pipeline or connection, or external force, etc., which causes a small amount of refrigerant to overflow. This overflowed refrigerant gas is not enough to cause a safety hazard, so the operating safety factor of the air conditioner can be guaranteed, thereby releasing the air conditioner restriction state, releasing the alarm and normal response instructions.

[0152] If the second refrigerant concentration meets the second concentration condition, it is determined that there is a refrigerant leak in the outdoor unit. Long-term leakage will cause safety hazards. At this time, the air conditioner operation mode can be converted to the air supply mode, and the user can be reminded to find an air conditioner maintenance personnel for maintenance, so as to avoid the risk of the air conditioner being powered on and generating electric sparks and explosions. At this time, it can be determined that the refrigerant leakage rate of the outdoor unit is fast, and the gas concentration rises rapidly. The effect of exhausting with the set gear is not ideal, and the air conditioner maintenance personnel are required to come to the door for maintenance and inspection. If the user sends an air conditioner shutdown command, it means that the indoor temperature has reached the comfort level of the user's body temperature, and the refrigerant is not required to participate in the heating or cooling cycle for the time being. Therefore, the user's comfort requirements and power saving requirements can be met in the air supply mode. Switching to the air supply mode means that the indoor temperature has reached the comfort zone of the user's body temperature or no longer needs cooling / heating, so it switches to the air supply mode.

[0153] In the air supply mode, the air inlet baffle assembly 3 opens the air inlet 102, and the indoor fan 2 works to form an air circulation in the room. At this time, the refrigerant diffuses into the indoor concentration and does not cause any safety hazard.

[0154] S806. In response to the indoor unit self-check instruction, control the air inlet baffle assembly to operate so as to seal the air inlet of the indoor unit.

[0155] S807: Drive the internal fan to run for a first preset time to discharge the airflow entering the air outlet to the outside through the air outlet.

[0156] S808. Obtain a first refrigerant concentration detected by the first refrigerant sensor.

[0157] S809. When the first refrigerant concentration meets the first concentration condition, determine that there is a refrigerant leakage in the indoor unit, drive the air inlet baffle assembly and the indoor fan to execute the refrigerant emptying strategy, and adjust to the air conditioner locked state, wherein an alarm is issued when in the air conditioner locked state, and response instructions are prohibited.

[0158] In the embodiment of the present invention, the description of steps S806-S809 refers to the description of steps S702-S706. In addition, when the first refrigerant concentration does not meet the first concentration condition, it is determined that there is no refrigerant leakage in the indoor unit, and the air conditioner can be shut down normally. Therefore, when the flammable refrigerant leaks in the indoor unit or the outdoor unit, the leaked refrigerant can be quickly discharged outdoors first, and the air conditioner can be locked or restricted to alarm, so that the risk of explosion caused by excessive leakage concentration can be avoided on the basis of timely reminding the user of the refrigerant leakage, thereby improving the operating safety factor of the air conditioner.

[0159] After executing the refrigerant emptying strategy, the first refrigerant concentration can be further detected. If the first refrigerant concentration after the second detection does not meet the first concentration condition, the power is shut down. If the first refrigerant concentration after the second detection still meets the first concentration condition, the refrigerant emptying strategy is repeatedly executed until the first refrigerant concentration meets the first concentration condition.

[0160] In another optional implementation, whether the refrigerant is leaking can also be detected during the operation of the air conditioner, and the control method further includes:

[0161] In response to an operation self-check instruction, air-conditioning operation data is acquired, wherein the operation self-check instruction is generated during the operation of the air conditioner.

[0162] In an embodiment of the present invention, the air-conditioning operation data can be understood as the parameters that affect the change of the refrigerant circulation amount during the operation of the air-conditioning. For example, the air-conditioning operation data may include the exhaust temperature of the compressor, the operation frequency, the temperature change rate of the exhaust temperature, the pipe temperature of the evaporator, and the pipe temperature of the condenser. The operation self-check instruction is an instruction for instructing the air-conditioner to detect whether a refrigerant leak occurs during the operation of the air-conditioner. For example, the operation self-check instruction may be generated after the air-conditioner starts from the start-up moment and the operation self-check time has passed, wherein the operation self-check time may be a value such as 10 minutes, which is not limited too much here. The indoor controller 4 obtains the air-conditioning operation data in response to the operation self-check instruction, wherein the temperature data may be obtained based on the detection of the temperature sensor.

[0163] When it is determined that the air-conditioning operation data meets the set leakage conditions, it is determined that the air conditioner has a leak, the operating frequency of the compressor of the outdoor unit is driven, and the operating frequency stops when it drops to the lower limit operating frequency, the outdoor fan 9 is controlled to operate for the second preset time according to the set gear, and a self-test instruction for the indoor unit is generated.

[0164] In the embodiment of the present invention, the set leakage condition refers to the condition used to determine whether the air conditioner has a refrigerant leakage during the operation of the air conditioner. When it is determined that the air conditioner has a leakage, the operating frequency of the compressor is reduced to the lower limit operating frequency. On the one hand, it is to reduce the refrigerant circulation rate in the air conditioner to prevent the compressor from being powered off at a higher operating frequency, causing a large change in pressure, causing the circulation pipeline to rupture and increase the amount of refrigerant leakage. On the other hand, after the refrigerant leaks, the compressor needs to do more work to ensure the operation cycle of the air conditioner. As a result, the cylinder of the compressor is prone to heat up. Reducing the operating frequency can protect the compressor and prevent the compressor from overheating.

[0165] By controlling the external fan 9 to run for the second preset time according to the set gear, the refrigerant leaked in the outdoor unit can be discharged outside the outdoor unit through the external fan 9, thereby effectively reducing the concentration of the refrigerant gas leaked in the outdoor unit, that is, reducing the concentration of the second refrigerant, avoiding the risk of the outdoor unit exploding due to excessive refrigerant concentration in the outdoor unit and sparks generated when the outdoor unit is working. In some preferred embodiments, the set gear can be the highest gear that the external fan 9 can run. The rotation speed of the external fan 9 can be increased to discharge the refrigerant gas in the outdoor unit at the fastest discharge rate.

[0166] Finally, an indoor unit self-check instruction is generated, so that the refrigerant leakage detection of the indoor unit can be performed by responding to the indoor unit self-check instruction, so as to find out whether the refrigerant leakage occurs in the outdoor unit or the indoor unit of the air conditioner.

[0167] In one embodiment, if the operating frequency of the compressor is greater than or equal to the abnormal frequency threshold, and the temperature change rate of the compressor exhaust is greater than or equal to the preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the startup pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the startup pipe temperature of the condenser is less than or equal to the second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition.

[0168] In the embodiment of the present invention, in order to ensure the normal circulation of the refrigerant in the event of a refrigerant leakage, the compressor will increase the operating frequency to increase the work to compensate for the impact of insufficient refrigerant, thereby causing the operating frequency of the compressor to be greater than or equal to the abnormal frequency threshold. The abnormal frequency threshold is a frequency threshold for determining that the operating frequency is abnormally increased due to a refrigerant leakage. For example, the abnormal frequency threshold may be 28 Hz, 30 Hz, 35 Hz, and 40 Hz, etc., which are not limited in detail.

[0169] The temperature change rate of the compressor exhaust gas can be obtained by the temperature difference between the current exhaust gas temperature and the exhaust gas temperature detected in the previous minute, and the unit of measurement of the temperature change rate can be degrees Celsius per minute. Correspondingly, when the temperature change rate is too high, it means that the exhaust gas temperature change is in an abnormal fluctuation state and the operation is unstable, which means that the refrigerant may leak. Among them, the preset temperature rate can be 3 degrees Celsius per minute.

[0170] If the temperature difference between the current pipe temperature of the evaporator and the start-up pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the start-up pipe temperature of the condenser is less than or equal to the second temperature difference, it means that the refrigerant is not fully heat exchanged with the evaporator and the condenser, and there may be a refrigerant leak. The first temperature difference and the second temperature difference can be consistent, for example, the first temperature difference can be 2 degrees Celsius.

[0171] In summary, in order to improve the detection accuracy of whether the refrigerant is leaking, when it is determined that the air-conditioning operation data meets all conditions, it is determined that the air-conditioning operation data meets the set leakage condition, and it is determined that the air conditioner is leaking.

[0172] In another embodiment, if the exhaust temperature of the compressor is greater than or equal to a set temperature threshold, and the temperature change rate of the compressor exhaust is greater than or equal to a preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the startup pipe temperature of the evaporator is less than or equal to a first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the startup pipe temperature of the condenser is less than or equal to a second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition.

[0173] The embodiment of the present invention is different from the above-mentioned set leakage condition in that: the exhaust temperature of the compressor is greater than or equal to the set temperature threshold. Considering that in the case of refrigerant leakage, the heat generated by the compressor when working cannot be taken away by the refrigerant in time, and the currently detected exhaust temperature will reach a very high temperature value. The set temperature threshold can be the lower temperature threshold for determining whether a refrigerant leakage occurs. For example, the set temperature can be 90 degrees Celsius, 92 degrees Celsius, 95 degrees Celsius, etc., which are not limited in detail here.

[0174] In summary, the embodiment of the present invention ensures the stable operation of the air conditioner and improves the safety factor of the use of flammable refrigerant by multiple detection methods such as power-on self-test, operation self-test and shutdown self-test to detect whether the refrigerant is leaking. In addition, when a refrigerant leak occurs, the refrigerant is emptied by reversing the internal motor to reduce the amount of refrigerant leaking into the room, quickly emptying the refrigerant, reducing the risk of combustion in the room, and ensuring the personal and property safety of users.

[0175] It should be noted that, for the method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the described order of actions, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0176] Reference Fig. 9 , shows a control device of a controller provided by an embodiment of the present invention, the device may include:

[0177] The component control module 901 is used to control the air inlet baffle component 3 to operate in response to the indoor unit self-check instruction, so as to close the air inlet 102 of the indoor unit.

[0178] The first driving module 902 is used to drive the interior fan 2 to operate so as to discharge the airflow entering through the air outlet 103 to the outdoors through the air outlet 104 .

[0179] The risk response module 903 is used to drive the air inlet baffle assembly 3 and the internal fan 2 to execute the refrigerant exhaust strategy and adjust to the air-conditioning locked state when the target leakage condition is detected. When in the air-conditioning locked state, an alarm is issued and response instructions are prohibited.

[0180] In an optional embodiment of the invention, the risk response module 903 may include:

[0181] The component control submodule is used to control the action of the air inlet baffle component 3 to close the air inlet 102 of the indoor unit.

[0182] The fan driving submodule is used to drive the indoor fan 2 to run for a set emptying time to discharge the refrigerant leaked from the indoor unit to the outside through the exhaust port 104.

[0183] In an optional embodiment of the invention, the control device may further include a first condition determination module, wherein the first condition determination module is configured to:

[0184] After the set emptying time has passed, the first refrigerant concentration detected by the first refrigerant sensor 5 is obtained.

[0185] If the first refrigerant concentration does not meet a first concentration condition, the air conditioner locking state is released.

[0186] If the first refrigerant concentration meets a first concentration condition, the air conditioner power-off operation is performed.

[0187] In an optional embodiment of the invention, the risk response module 903 is further used to:

[0188] Providing a display interface, inputting the alarm information into the display interface for display; and / or,

[0189] Drive the buzzer to alarm.

[0190] In an optional embodiment of the invention, the control device further includes:

[0191] The external unit self-check module is used to obtain the second refrigerant concentration detected by the second refrigerant sensor 8 in response to the external unit self-check instruction when it is detected that the target leakage condition is not met or in response to the air conditioner shutdown instruction.

[0192] The compressor control module is used to drive the operating frequency of the compressor of the outdoor unit to stop when the operating frequency drops to a lower limit operating frequency when the concentration of the second refrigerant meets a second concentration condition.

[0193] The state adjustment module is used to adjust to the air conditioning restriction state and control the external fan 9 to run for a second preset time according to the set gear. When in the air conditioning restriction state, an alarm is issued and only the air conditioning shutdown command and the air supply mode command are responded to.

[0194] In an optional embodiment of the invention, the control device further includes a second condition determination module, and the second condition determination module is further used to:

[0195] After the second preset time period has passed, the second refrigerant concentration is acquired again.

[0196] If the second refrigerant concentration does not satisfy a second concentration condition, the air conditioning restriction state is released.

[0197] If the second refrigerant concentration meets the second concentration condition, the air conditioning operation mode is adjusted to the air supply mode.

[0198] In an optional embodiment of the invention, the control device may further include an operation self-checking module, and the operation self-checking module is further used to:

[0199] In response to an operation self-check instruction, air-conditioning operation data is acquired, wherein the operation self-check instruction is generated during the operation of the air conditioner.

[0200] When it is determined that the air-conditioning operation data meets the set leakage condition, it is determined that the air-conditioner has a leakage.

[0201] The operating frequency of the compressor driving the outdoor unit stops when it drops to the lower limit operating frequency, the outdoor fan 9 is controlled to run for a second preset time according to the set gear, and a self-check instruction for the indoor unit is generated.

[0202] In an optional embodiment of the invention, the operation self-check module is further used for:

[0203] If the operating frequency of the compressor is greater than or equal to the abnormal frequency threshold, and the temperature change rate of the compressor exhaust is greater than or equal to the preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the start-up pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the start-up pipe temperature of the condenser is less than or equal to the second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition; or,

[0204] If the exhaust temperature of the compressor is greater than or equal to the set temperature threshold, and the temperature change rate of the compressor exhaust is greater than or equal to the preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the startup pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the startup pipe temperature of the condenser is less than or equal to the second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition.

[0205] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0206] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0207] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0208] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0209] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0210] An indoor controller, comprising:

[0211] one or more processors;

[0212] Memory;

[0213] One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute the method described in the above embodiment.

[0214] A computer-readable storage medium stores a computer program used in combination with an electronic device, wherein the computer program can be executed by a processor to implement the method described in the above embodiment.

[0215] A computer program product includes a computer program / computer executable instructions, wherein the computer program / computer executable instructions, when executed by a processor in an internal machine controller, implements the method described in any one of the above-mentioned embodiments of the invention.

[0216] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0217] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0218] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0219] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0220] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0221] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0222] The air conditioner, the control method of the air conditioner and the control device of the air conditioner provided by the present invention are introduced in detail above. The principle and implementation mode of the present invention are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and the scope of application. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An air conditioner, characterized in that: The air conditioner comprises an indoor unit, and the indoor unit comprises: An inner casing (1), wherein the inner casing (1) is provided with a containing cavity (101), an air inlet (102), an air outlet (103) and an exhaust port (104), wherein the air inlet (102), the air outlet (103) and the exhaust port (104) are respectively connected to the containing cavity (101) by forming an air path; An internal fan (2), the internal fan (2) being located in the accommodating cavity (101); an air inlet baffle assembly (3), the air inlet baffle assembly (3) being located at the air inlet (102), wherein when the air outlet (104) is closed, the internal fan (2) operates to guide the airflow at the air inlet (102) to the air outlet (103); When the air inlet baffle assembly (3) closes the air inlet (102), the internal fan (2) operates to discharge the airflow entering through the air outlet (103) to the outside through the air outlet (104).

2. The air conditioner according to claim 1, characterized in that: The indoor unit further comprises: An indoor controller (4), the indoor controller (4) being electrically connected to the indoor fan (2) and to the air inlet baffle assembly (3); A first refrigerant sensor (5), wherein the first refrigerant sensor (5) is located in the accommodating cavity (101), and the first refrigerant sensor (5) is electrically connected to the indoor unit controller (4), wherein the indoor unit controller (4) adjusts the working state of the indoor fan (2) and the air inlet baffle assembly (3) according to the first refrigerant concentration detected by the first refrigerant sensor (5).

3. The air conditioner according to claim 2, characterized in that: The air conditioner comprises an outdoor unit, and the outdoor unit comprises: An external machine controller (6), the external machine controller (6) being electrically connected to the internal machine controller (4); A battery (7), the battery (7) being electrically connected to the external controller (6) to supply power to the external controller (6); A second refrigerant sensor (8), the second refrigerant sensor (8) being electrically connected to the external unit controller (6); An external fan (9), the external fan (9) is electrically connected to the external machine controller (6), and the external machine controller (6) adjusts the working state of the external fan (9) according to the second refrigerant concentration detected by the second refrigerant sensor (8).

4. A method for controlling an air conditioner, characterized in that: The air conditioner comprises the air conditioner according to any one of claims 1 to 3, and the control method comprises: In response to the indoor unit self-check instruction, the air inlet baffle assembly (3) is controlled to operate so as to seal the air inlet (102) of the indoor unit; The internal fan (2) is driven to operate so as to discharge the airflow entering through the air outlet (103) to the outside through the air outlet (104); When it is detected that the target leakage condition is met, the air inlet baffle assembly (3) and the internal fan (2) are driven to execute the refrigerant exhaust strategy and are adjusted to the air conditioner locked state, wherein an alarm is issued when in the air conditioner locked state and response instructions are prohibited.

5. The air conditioner control method according to claim 4, characterized in that: The driving of the air inlet baffle assembly (3) and the internal fan (2) to execute the refrigerant exhaust strategy includes: Controlling the movement of the air inlet baffle assembly (3) to seal the air inlet (102) of the indoor unit; The indoor fan (2) is driven to run for a set exhaust time to discharge the refrigerant leaking from the indoor unit to the outside through the exhaust port (104).

6. The air conditioner control method according to claim 5, characterized in that: The control method comprises: After the set emptying time has elapsed, obtaining a first refrigerant concentration detected by a first refrigerant sensor (5); If the first refrigerant concentration does not meet the first concentration condition, releasing the air conditioner lock state; If the first refrigerant concentration meets a first concentration condition, the air conditioner power-off operation is performed.

7. The air conditioner control method according to claim 4, characterized in that: The alarm is issued when the air conditioner is in the locked state, including: Providing a display interface, inputting the alarm information into the display interface for display; and / or driving a buzzer to sound an alarm.

8. The air conditioner control method according to claim 4, characterized in that: The control method comprises: When it is detected that the target leakage condition is not met, or when responding to the air conditioner shutdown instruction, in response to the external unit self-check instruction, the second refrigerant concentration detected by the second refrigerant sensor (8) is obtained; When the concentration of the second refrigerant satisfies the second concentration condition, the operating frequency of the compressor of the outdoor unit is driven to stop when it drops to the lower limit operating frequency; The air conditioning is adjusted to a restricted state, and the external fan (9) is controlled to run for a second preset time according to the set gear, wherein an alarm is issued when in the restricted state, and only the air conditioning shutdown command and the air supply mode command are responded to.

9. The air conditioner control method according to claim 8, characterized in that: The control method comprises: After the second preset time has passed, re-obtaining the second refrigerant concentration; If the second refrigerant concentration does not meet the second concentration condition, releasing the air conditioning restriction state; If the second refrigerant concentration meets the second concentration condition, the air conditioning operation mode is adjusted to the air supply mode.

10. The air conditioner control method according to claim 4, characterized in that: The control method further comprises: In response to an operation self-check instruction, acquiring air conditioner operation data, wherein the operation self-check instruction is generated during the operation of the air conditioner; When it is determined that the air conditioner operation data meets the set leakage condition, determining that the air conditioner has a leakage; The operating frequency of the compressor driving the outdoor unit stops when it drops to a lower limit operating frequency, controls the outdoor fan (9) to operate for a second preset time according to the set gear, and generates an indoor unit self-check instruction.

11. The air conditioner control method according to claim 10, characterized in that: The determining that the air-conditioning operation data meets the set leakage condition includes: If the operating frequency of the compressor is greater than or equal to the abnormal frequency threshold, and the temperature change rate of the compressor exhaust is greater than or equal to the preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the start-up pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the start-up pipe temperature of the condenser is less than or equal to the second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition; or, If the exhaust temperature of the compressor is greater than or equal to the set temperature threshold, and the temperature change rate of the compressor exhaust is greater than or equal to the preset temperature rate, and the temperature difference between the current pipe temperature of the evaporator and the startup pipe temperature of the evaporator is less than or equal to the first temperature difference, and the temperature difference between the current pipe temperature of the condenser and the startup pipe temperature of the condenser is less than or equal to the second temperature difference, it is determined that the air conditioning operation data meets the set leakage condition.

12. A control device for an air conditioner, characterized in that: The air conditioner comprises the air conditioner according to any one of claims 1 to 3, and the control device comprises: A component control module, used for controlling the air inlet baffle component (3) to operate in response to an indoor unit self-check instruction, so as to seal the air inlet (102) of the indoor unit; A first driving module, used for driving the internal fan (2) to operate so as to discharge the airflow entering through the air outlet (103) to the outside through the air outlet (104); The risk response module is used to drive the air inlet damper assembly (3) and the internal fan (2) to execute the refrigerant exhaust strategy and adjust to the air conditioner locking state when the target leakage condition is detected, wherein an alarm is issued when the air conditioner is in the locked state and a response instruction is prohibited.

13. An indoor controller, characterized in that: include: one or more processors; Memory; One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs are configured to execute the method according to any one of claims 4 to 11.

14. A computer-readable storage medium storing a computer program for use in conjunction with an electronic device, characterized in that: The computer program can be executed by a processor to implement the method according to any one of claims 4 to 11.

15. A computer program product comprising a computer program / computer executable instructions, characterized in that: The computer program / computer executable instructions, when executed by a processor in the internal machine controller, implement the method described in any one of claims 4 to 11.

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