Control method, control device, air conditioner indoor unit, air conditioner and storage medium

Abstract

The invention discloses a control method, a control device, an air conditioner indoor unit, an air conditioner and a storage medium. The air conditioner indoor unit comprises a first control valve, an indoor heat exchanger, an indoor fan, a second control valve, a first refrigerant connector and a second refrigerant connector, the indoor heat exchanger is connected with the first refrigerant connector through the first control valve and connected with the second refrigerant connector through the second control valve, and the first refrigerant connector is used for being connected with the air conditioner outdoor unit. The second refrigerant connector is used for being connected with the four-way valve. The control method comprises the steps that under the condition that the air conditioner indoor unit is started, the indoor fan is controlled to operate, and the first control valve and the second control valve are switched on; and controlling the first control valve and the second control valve to be disconnected according to the shutdown instruction. According to the control method, a refrigerant sensor can be omitted to reduce the cost, and meanwhile, the safety risk caused by too high concentration of the indoor leaked refrigerant is avoided to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a control method, control device, indoor unit of an air conditioner, air conditioner, and computer storage medium. Background Technology

[0002] In related technologies, air conditioners use flammable refrigerant. Typically, the indoor unit of an air conditioner is equipped with a refrigerant sensor to ensure that a refrigerant leak is detected promptly and the indoor fan is activated, preventing refrigerant buildup from exceeding flammable concentrations. However, installing a refrigerant sensor and corresponding hardware in the indoor unit is expensive, significantly increasing the system cost. Summary of the Invention

[0003] This invention provides a control method, a control device, an indoor air conditioning unit, an air conditioner, and a computer storage medium to solve at least one of the aforementioned technical problems.

[0004] This invention provides a control method for an indoor air conditioning unit. The indoor air conditioning unit includes a first control valve, an indoor heat exchanger, an indoor fan, a second control valve, a first refrigerant connector, and a second refrigerant connector. The indoor heat exchanger is connected to the first refrigerant connector via the first control valve and to the second refrigerant connector via the second control valve. The first refrigerant connector is used to connect to an outdoor heat exchanger, and the second refrigerant connector is used to connect to a four-way valve.

[0005] The control method includes:

[0006] When the indoor unit of the air conditioner is turned on, the indoor fan is controlled to run, and the first control valve and the second control valve are activated.

[0007] According to the shutdown command, the first control valve and the second control valve are disconnected.

[0008] In some embodiments, the first control valve includes a throttling component and a first on / off valve, and the second control valve includes a second on / off valve. Controlling the first on / off valve to disconnect causes the first control valve to disconnect, and controlling the second on / off valve to disconnect causes the second control valve to disconnect.

[0009] In some implementations, controlling the first control valve and the second control valve to disconnect according to a shutdown command includes:

[0010] According to the shutdown command, the first control valve and the second control valve are kept on for a preset time and then disconnected.

[0011] In some implementations, controlling the first control valve and the second control valve to disconnect according to a shutdown command includes:

[0012] According to the shutdown command, the indoor fan is controlled to run for a preset time and then shut down.

[0013] In some implementations, the preset duration is greater than or equal to the shortest pressure equilibrium time.

[0014] In some implementations, the preset duration is greater than 0 seconds and less than or equal to 120 seconds.

[0015] In some embodiments, the first control valve is disposed near the indoor heat exchanger, and / or, the second control valve is disposed near the indoor heat exchanger. A control device according to an embodiment of the present invention includes:

[0016] Processor, and;

[0017] A memory storing a computer program, which, when executed by the processor, implements the steps of the control method described in any of the above embodiments.

[0018] In the aforementioned control device, the memory can store a computer program for implementing the aforementioned control method, so that the processor can execute the steps of the aforementioned control method according to the computer program. This can reduce costs by omitting the refrigerant sensor, while to a certain extent avoiding the safety risks caused by excessive concentration of leaked refrigerant indoors.

[0019] An indoor air conditioning unit according to an embodiment of the present invention includes the control device described in the above embodiment.

[0020] In the aforementioned air conditioner indoor unit, the control device controls the operation of the air conditioner indoor unit, enabling the air conditioner indoor unit to achieve the above control method. This can reduce costs by omitting the refrigerant sensor, while to a certain extent avoiding the safety risks caused by excessive concentration of leaked refrigerant indoors.

[0021] An air conditioner according to an embodiment of the present invention includes the indoor unit of the air conditioner described above.

[0022] The aforementioned air conditioner includes an indoor unit, enabling the air conditioner to implement the above control method. This allows for the elimination of the refrigerant sensor to reduce costs, while also mitigating the safety risks caused by excessively high concentrations of leaked refrigerant indoors.

[0023] The present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by the processor, implements the steps of the control method of any of the above embodiments.

[0024] In the aforementioned computer-readable storage medium, the computer-readable storage medium can store a computer program, thereby enabling the memory to store a computer program for implementing the aforementioned control method, so that the processor can execute the steps of the aforementioned control method according to the computer program. This can reduce costs by omitting the refrigerant sensor, while to a certain extent avoiding the safety risks caused by excessive concentration of leaked refrigerant indoors.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0027] Figures 1 to 3 This is a flowchart illustrating the control method according to an embodiment of the present invention;

[0028] Figures 4 to 7 This is a schematic diagram of the indoor unit of an air conditioner according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the air conditioner module according to an embodiment of the present invention.

[0030] Explanation of key component reference numerals:

[0031] Air conditioner 800, indoor unit 100, control device 2, memory 21, processor 22, first refrigerant connector 101, second refrigerant connector 102, indoor heat exchanger 103, first control valve 104, second control valve 105, indoor fan 106, throttling component 109, first on / off valve 110, second on / off valve 108. Detailed Implementation

[0032] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention.

[0039] Please see Figure 1 This invention provides a control method for an indoor unit 100 of an air conditioner. Please refer to the figure. Figures 4 to 6 The indoor unit 100 of the air conditioner includes a first control valve 104, an indoor heat exchanger 103, an indoor fan 106, a second control valve 105, a first refrigerant connector 101, and a second refrigerant connector 102. The indoor heat exchanger 103 is connected to the first refrigerant connector 101 through the first control valve 104 and to the second refrigerant connector 102 through the second control valve 105. The first refrigerant connector 101 is used to connect to the outdoor heat exchanger, and the second refrigerant connector 102 is used to connect to the four-way valve.

[0040] Control methods include:

[0041] Step S01: When the indoor unit 100 of the air conditioner is turned on, control the indoor fan 106 to run and open the first control valve 104 and the second control valve 105.

[0042] Step S03: According to the shutdown command, control the first control valve 104 and the second control valve 105 to disconnect.

[0043] Specifically, in one embodiment, a split-type air conditioner 800 may include an outdoor unit and an indoor unit 100. The air conditioner 800 is a device for regulating indoor air temperature, humidity, and circulation, typically used to provide cooling, heating, and / or dehumidification functions. It achieves these functions through refrigerant circulation and heat exchange, making the indoor environment more comfortable.

[0044] An air conditioner outdoor unit is an air conditioning device located outdoors, and an air conditioner indoor unit 100 is an air conditioning device located outdoors. An air conditioner outdoor unit includes a compressor, an outdoor heat exchanger, an outdoor fan, and a four-way valve. The four-way valve connects the compressor's output port to the outdoor heat exchanger.

[0045] The indoor unit 100 of the air conditioner includes an indoor heat exchanger 103, an indoor fan 106, a first control valve 104, a second control valve 105, a first refrigerant connector 101, and a second refrigerant connector 102.

[0046] The indoor heat exchanger 103 is a device that can be used to exchange heat, transferring heat from one object (or fluid) to another object (or fluid). Optionally, the indoor heat exchanger 103 may include, but is not limited to, shell-and-tube heat exchangers, plate heat exchangers, spiral plate heat exchangers, tubular heat exchangers, or finned tube heat exchangers.

[0047] The indoor fan 106 can convert electrical energy into mechanical energy, and then drive the air flow through the fan blades, thereby sending the indoor airflow into the indoor heat exchanger 103, so that the airflow flowing out of the indoor heat exchanger 103 becomes cold or hot air and is delivered to every corner of the room.

[0048] The first control valve 104 and the second control valve 105 are valves for controlling the flow rate of a fluid (gas, liquid, or mixture). In one embodiment, the first control valve 104 includes a first on / off valve 110 for controlling the flow and cut-off of the fluid. Optionally, the first control valve 104 may include a throttling element for regulating the flow rate of the fluid. The second control valve 105 includes a second on / off valve 108 for controlling the flow and cut-off of the fluid.

[0049] The first refrigerant connector 101 is a connector on the indoor unit 100 for connecting the refrigerant pipe to the outdoor heat exchanger of the outdoor unit. The second refrigerant connector 102 is a connector on the indoor unit 100 for connecting the refrigerant pipe to the four-way valve of the outdoor unit.

[0050] In one embodiment, the indoor unit 100 of the air conditioner is connected to the outdoor heat exchanger via a first refrigerant connector 101, and to a four-way valve via a second refrigerant connector 102. When the air conditioner 800 is in cooling mode, for the outdoor unit, low-pressure, low-temperature gaseous refrigerant is drawn in and compressed by the compressor into high-pressure, high-temperature gaseous refrigerant. This high-pressure, high-temperature gaseous refrigerant is then transported to the outdoor heat exchanger (condenser) via the four-way valve. In the condenser, the gaseous refrigerant exchanges heat with the outdoor air, releasing heat and condensing into high-pressure liquid refrigerant. For the indoor unit 100, during operation, the first control valve 104 and the second control valve 105 are open. The high-pressure liquid refrigerant flows through the first refrigerant connector 101 to the throttling component 109 of the first control valve 104 for throttling, causing a sudden pressure drop, resulting in low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then enters the indoor heat exchanger 103 (evaporator). Inside the evaporator, the low-temperature, low-pressure liquid refrigerant absorbs heat from the indoor air and vaporizes into a low-pressure, low-temperature gaseous refrigerant. Simultaneously, the indoor fan 106 draws in indoor air and forces it through the evaporator surface. Heat exchange occurs between the air and the evaporator surface, lowering the temperature and creating cool air. This cool air is then delivered into the room through the outlet of the indoor fan 106, achieving the cooling effect. The low-pressure, low-temperature gaseous refrigerant flows to the four-way valve through the second control valve 105 and the second refrigerant connector 102. The compressor 101 then draws in the low-pressure, low-temperature gaseous refrigerant again, repeating the cycle to complete the refrigeration cycle.

[0051] In one embodiment, the indoor unit 100 of the air conditioner is connected to the outdoor heat exchanger via a first refrigerant connector 101, and to a four-way valve via a second refrigerant connector 102. When the air conditioner 800 is in heating mode, for the outdoor unit, low-pressure, low-temperature gaseous refrigerant is drawn in by the compressor and compressed into high-pressure, high-temperature gaseous refrigerant, which flows to the four-way valve. For the indoor unit 100, during operation, the first control valve 104 and the second control valve 105 are open, and the high-pressure, high-temperature gaseous refrigerant flows through the second refrigerant connector 102 to the second control valve 105 to be delivered to the indoor heat exchanger 103 (condenser). Inside the condenser, the gaseous refrigerant exchanges heat with the indoor air, releasing heat and condensing into high-pressure liquid refrigerant. Simultaneously, the indoor fan 106 draws in indoor air and forces it through the condenser surface. The air exchanges heat with the condenser surface, its temperature rises, and hot air is formed. Hot air is delivered into the room through the outlet of the indoor fan 106 to raise the temperature. Subsequently, the high-pressure liquid refrigerant is throttled by the throttling component 109 of the first control valve 104, causing a sudden pressure drop and transforming it into a low-temperature, low-pressure liquid refrigerant. For the outdoor unit, the low-temperature, low-pressure liquid refrigerant flows through the first refrigerant connector 101 to the outdoor heat exchanger (evaporator). Inside the evaporator, the low-temperature, low-pressure liquid refrigerant absorbs heat from the outdoor air and vaporizes into a low-pressure, low-temperature gaseous refrigerant. This low-pressure, low-temperature gaseous refrigerant is then drawn back into the compressor, and the cycle repeats, completing the heating cycle.

[0052] In related technologies, air conditioners use flammable refrigerant. During operation, refrigerant leaks can occur due to factors such as loose or aging pipe connections. Typically, indoor air conditioner units are equipped with refrigerant sensors to detect leaks promptly and activate the indoor fan, preventing refrigerant buildup from exceeding flammable concentrations. However, installing refrigerant sensors and corresponding hardware in the indoor unit is expensive, significantly increasing system costs.

[0053] In this embodiment of the invention, the indoor unit 100 of the air conditioner includes a first control valve 104 and a second control valve 105. The first control valve 104 is connected to the outdoor heat exchanger and the indoor heat exchanger 103, and the second control valve 105 is connected to the four-way valve and the indoor heat exchanger 103. The indoor unit 100 and the outdoor unit of the air conditioner are connected to form an air conditioner 800. After receiving a shutdown command, the first control valve 104 and the second control valve 105 are disconnected, so that most of the refrigerant cannot flow to the indoor unit 100.

[0054] It is understood that, in the embodiments of the present invention, the indoor unit 100 of the air conditioner can be compatible with different outdoor units of the air conditioner. At the same time, the first control valve 104 and the second control valve 105 can prevent most of the refrigerant from flowing to the indoor unit 100 of the air conditioner. Thus, while omitting the refrigerant sensor to reduce costs, it can also avoid the safety risks caused by excessive concentration of leaked refrigerant indoors to a certain extent.

[0055] In this embodiment of the invention, when the indoor unit 100 of the air conditioner is turned on, the indoor fan 106 is operated, and the first control valve 104 and the second control valve 105 are opened. That is, when the indoor unit 100 is turned on, it operates normally, and the refrigerant circulates within the indoor unit 100 according to the mode of the air conditioner 800 to achieve the functions of different modes. Upon receiving a shutdown command, the first control valve 104 and the second control valve 105 are opened according to the shutdown command, so that most of the refrigerant cannot flow to the indoor unit 100.

[0056] Understandably, when the indoor unit 100 of the air conditioner is on, the operation of the indoor fan 106 can promote air circulation, which can disperse the leaked refrigerant even in the event of a refrigerant leak, thus preventing refrigerant accumulation. Upon receiving a shutdown command, the first control valve 104 and the second control valve 105 are disconnected to prevent most of the refrigerant from flowing to the indoor unit 100 of the air conditioner.

[0057] It is understood that, in the embodiments of the present invention, the first control valve 104 and the second control valve 105 can be any component or combination of components that can isolate the refrigerant passage.

[0058] It is understood that, in the embodiments of the present invention, the first control valve 104 may be a component with throttling and isolation functions, or a combination of components with throttling and isolation functions. Figure 5 The first control valve 104 can be a combination of components with throttling and isolation functions. Figure 6 The first control valve 104 can be a component with throttling and isolation functions.

[0059] In the above control method, when the indoor unit 100 of the air conditioner is turned on, the indoor fan 106 is controlled to run, and the first control valve 104 and the second control valve 105 are opened, so that the refrigerant leaking indoors will not accumulate under the action of the indoor fan 106, which reduces the risk of flammability to a certain extent. After receiving the shutdown command, the first control valve 104 and the second control valve 105 are controlled to disconnect according to the shutdown command, so that most of the refrigerant cannot flow into the indoor unit 100 of the air conditioner. Thus, while omitting the refrigerant sensor to reduce costs, the safety risk caused by excessive concentration of leaked refrigerant indoors is avoided to a certain extent.

[0060] In some implementations, please refer to Figures 4 to 6 The first control valve 104 includes a throttling component 109 and a first on / off valve 110, and the second control valve 105 includes a second on / off valve 108. Controlling the first on / off valve 110 to disconnect the first control valve 104, and controlling the second on / off valve 108 to disconnect the second control valve 105.

[0061] Specifically, the first control valve 104 is located between the indoor heat exchanger 103 and the outdoor heat exchanger, and the second control valve 105 is located between the indoor heat exchanger 103 and the four-way valve.

[0062] The throttling component 109 of the first control valve 104 can be used to reduce the pressure of the refrigerant flowing to the evaporator (when the air conditioner 800 is in cooling mode, the indoor heat exchanger 103 is the evaporator; when the air conditioner 800 is in heating mode, the outdoor heat exchanger is the evaporator), so that the refrigerant can evaporate in the evaporator to achieve heat exchange.

[0063] The first on / off valve 110 of the first control valve 104 and the second on / off valve 108 of the second control valve 105 can cut off the flow of refrigerant to the indoor unit 100 of the air conditioner.

[0064] In one embodiment, the indoor unit 100 of the air conditioner is connected to the outdoor unit to form an air conditioner 800. When the air conditioner 800 is in cooling mode, refrigerant flows into the indoor unit 100 through the first refrigerant connector 101. When the air conditioner 800 is in heating mode, refrigerant flows into the indoor unit 100 through the second refrigerant connector 102. Upon receiving a shutdown command, the first control valve 104 and the second control valve 105 are disconnected, that is, the first on / off valve 110 and the second on / off valve 108 are controlled to cut off the refrigerant flow into the indoor unit 100.

[0065] In the above embodiments, the first control valve 104 includes a throttling component 109 and a first on / off valve 110, and the second control valve 105 includes a second on / off valve 108. This allows the indoor unit 100 of the air conditioner to adapt to multiple working modes (cooling, heating, etc.) while effectively managing the flow of refrigerant and reducing the amount of refrigerant on the indoor side.

[0066] In some implementations, please refer to Figure 2 Step S03 includes:

[0067] Step S03a: According to the shutdown command, control the first control valve 104 and the second control valve 105 to remain on for a preset time and then disconnect.

[0068] Specifically, since there may be a need to delay disconnecting the first control valve 104 and the second control valve 105 in the actual use of the air conditioner indoor unit 100, after receiving the shutdown command, the first control valve 104 and the second control valve 105 can be immediately disconnected, or the first control valve 104 and the second control valve 105 can be kept on for a preset time before disconnecting.

[0069] It should be noted that the delayed disconnection of the first control valve 104 and the second control valve 105 can be to protect the system or prevent problems such as liquid slugging or pipe rupture. Keeping the first control valve 104 and the second control valve 105 open for a period of time before disconnecting can balance the system pressure and prevent condensation.

[0070] In this embodiment of the invention, after receiving a shutdown command, the first on / off valve 110 is controlled to remain on for a preset time and then disconnect, and the second on / off valve 108 is controlled to remain on for a preset time and then disconnect.

[0071] In the above embodiments, after receiving the shutdown command, the first control valve 104 and the second control valve 105 are kept on for a preset time and then disconnected. This can meet the need for delayed disconnection of the first control valve 104 and the second control valve 105, while reducing the amount of refrigerant flowing to the indoor unit 100 of the air conditioner. In this way, while omitting the refrigerant sensor to reduce costs, the safety risks caused by excessive concentration of leaked refrigerant indoors can be avoided to a certain extent.

[0072] In some implementations, please refer to Figure 3 Step S03 includes:

[0073] Step S03b: According to the shutdown command, control the indoor fan 106 to keep running for a preset time and then shut it off.

[0074] Specifically, when the indoor unit 100 of the air conditioner is in the on state, that is, when the indoor unit 100 of the air conditioner is in the normal working state, the indoor fan 106 is running, and the refrigerant exchanges heat with the indoor air in the indoor heat exchanger 103 to achieve the cooling or heating function. After receiving the shutdown command, the indoor fan 106 continues to run. Since the compressor is no longer running, the temperature of the refrigerant in the indoor heat exchanger 103 is similar to the temperature of the indoor air. After receiving the shutdown command for a preset time, the indoor fan 106 is turned off.

[0075] In the above implementation, after receiving the shutdown command, the indoor fan 106 is controlled to run for a preset time and then shut down, which can blow away the refrigerant that has leaked on the indoor side, thereby reducing the accumulation of refrigerant and the resulting high concentration to a certain extent.

[0076] In some implementations, the preset duration is greater than or equal to the shortest pressure equilibrium time.

[0077] Specifically, the shortest pressure equalization time is the minimum time to ensure system pressure stability and avoid damage to components caused by sudden pressure changes. This time can be pre-calibrated and stored using methods such as simulation and testing of the indoor unit 100. In the actual application of the indoor unit 100, there is a need for a delayed disconnection of the first control valve 104 and the second control valve 105. After receiving a shutdown command, the first control valve 104 and the second control valve 105 are controlled to open for a preset time, and the indoor fan 106 is controlled to run for a preset time to disperse the refrigerant.

[0078] In order to further balance the system pressure and reduce the flammability risk of leaked refrigerant, the duration for which the first control valve 104 and the second control valve 105 are turned on is not less than the minimum pressure balance time, and the duration for which the indoor fan 106 is turned off is not earlier than the duration for which the first control valve 104 and the second control valve 105 are turned off, that is, the preset duration is greater than or equal to the minimum pressure balance time.

[0079] The relationship between the preset duration and the shortest pressure equilibrium time is shown below:

[0080] t min_balance ≤t;

[0081] Among them, t min_balance This represents the shortest time for pressure to reach equilibrium, and t represents the preset duration.

[0082] Optionally, the preset duration is greater than or equal to the maximum pressure equilibrium time. The relationship between the preset duration and the maximum pressure equilibrium time is as follows:

[0083] t max_balance ≤t;

[0084] Among them, t max_balance This indicates the longest time for pressure balance, and t represents the preset duration.

[0085] In the above embodiments, after receiving a shutdown command for a preset time, the indoor fan 106 is controlled to shut down. The preset time is greater than or equal to the shortest pressure balance time, which can balance the system pressure, improve the safety of the air conditioner indoor unit 100, and reduce the flammability risk of leaked refrigerant to a certain extent.

[0086] In some implementations, the preset duration is greater than 0 seconds and less than or equal to 120 seconds.

[0087] Specifically, when there is a need to delay disconnecting the first control valve 104 and the second control valve 105, the preset duration is greater than 0 seconds. After receiving the shutdown command, the first control valve 104 and the second control valve 105 are opened to perform operations such as pressure balancing, and the indoor fan 106 is operated to blow away the refrigerant. After receiving the shutdown command for the preset duration, the first control valve 104 and the second control valve 105 are disconnected, and the indoor fan 106 is turned off.

[0088] In some examples, the preset duration t is 10s, 20s, 30s, 40s, 50s, 60s, 70s, 80s, 90s, 100s, 110s, 120s, or other values ​​greater than 0s and less than or equal to 120s.

[0089] In the above embodiments, the preset duration is 0 to 120 seconds, which can meet the requirements of delaying the disconnection of the first control valve 104 and the second control valve 105, while preventing most of the refrigerant from flowing into the indoor unit 100 of the air conditioner. Thus, while omitting the refrigerant sensor to reduce costs, it can also avoid the safety risks caused by excessive concentration of leaked refrigerant indoors to a certain extent.

[0090] In some implementations, please refer to Figures 4 to 6 The first control valve 104 is located near the indoor heat exchanger 103, and / or the second control valve 105 is located near the indoor heat exchanger 103.

[0091] Specifically, since the refrigerant flow to the indoor unit 100 is cut off by the first control valve 104 and the second control valve 105, the refrigerant between the first control valve 104 and the second control valve 105 and the indoor heat exchanger 103 may still leak on the indoor side, setting the first control valve 104 close to the indoor heat exchanger 103 and / or setting the second control valve 105 close to the indoor heat exchanger 103 can further reduce the amount of refrigerant stored on the indoor side, so that even if a refrigerant leak occurs, the amount of refrigerant that can leak is less, thereby reducing the amount of refrigerant on the indoor side.

[0092] Understandably, please combine Figures 4 to 6 The first control valve 104 is located between the first refrigerant connector 101 and the indoor heat exchanger 103, and the pipe length between the first control valve 104 and the indoor heat exchanger 103 is less than the pipe length between the first control valve 104 and the first refrigerant connector 101. The second control valve 105 is located between the second refrigerant connector 102 and the indoor heat exchanger 103, and the pipe length between the second control valve 105 and the indoor heat exchanger 103 is less than the pipe length between the second control valve 105 and the second refrigerant connector 102.

[0093] In the above embodiments, the first control valve 104 is located near the indoor heat exchanger 103, and / or the second control valve 105 is located near the indoor heat exchanger 103, which can further reduce the amount of refrigerant that can leak indoors. This can reduce costs by omitting the refrigerant sensor and further avoid the safety risks caused by excessive concentration of leaked refrigerant indoors to a certain extent.

[0094] Please refer to Figure 7 One embodiment of the present invention provides a control device 2, which includes a processor 22 and a memory 21. The memory 21 stores a computer program. When the computer program is executed by the processor 22, it implements the steps of the control method described in any of the above embodiments.

[0095] Please refer to Figure 7 An air conditioner indoor unit 100 provided in this embodiment of the invention includes the control device 2 described in the above embodiment.

[0096] Specifically, the control device 2 can be electrically connected to components such as the indoor fan 106, the first control valve 104, and the second control valve 105, and the control device 2 can be used to control the operation of the indoor unit 100 of the air conditioner.

[0097] Please refer to Figure 8 The present invention provides an air conditioner 800 including the air conditioner indoor unit 100 of the above embodiments.

[0098] The present invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor 22, implements the steps of the control method of any of the above embodiments.

[0099] In some implementations, when the computer program is executed by the processor 22, the control method includes:

[0100] Step S01: When the indoor unit 100 of the air conditioner is turned on, control the indoor fan 106 to run and open the first control valve 104 and the second control valve 105.

[0101] Step S03: According to the shutdown command, control the first control valve 104 and the second control valve 105 to disconnect.

[0102] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0103] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more steps for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0104] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, combinations, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A control method for an indoor unit of an air conditioner, characterized in that, The indoor unit of the air conditioner includes a first control valve, an indoor heat exchanger, an indoor fan, a second control valve, a first refrigerant connector, and a second refrigerant connector. The indoor heat exchanger is connected to the first refrigerant connector through the first control valve and to the second refrigerant connector through the second control valve. The first refrigerant connector is used to connect to the outdoor heat exchanger, and the second refrigerant connector is used to connect to the four-way valve. The control method includes: When the indoor unit of the air conditioner is turned on, the indoor fan is controlled to run, and the first control valve and the second control valve are activated. According to the shutdown command, the first control valve and the second control valve are disconnected.

2. The control method according to claim 1, characterized in that, The first control valve includes a throttling component and a first on / off valve, and the second control valve includes a second on / off valve. Controlling the first on / off valve to disconnect causes the first control valve to disconnect, and controlling the second on / off valve to disconnect causes the second control valve to disconnect.

3. The control method according to claim 1, characterized in that, According to the shutdown command, controlling the first control valve and the second control valve to disconnect includes: According to the shutdown command, the first control valve and the second control valve are kept on for a preset time and then disconnected.

4. The control method according to claim 1, characterized in that, According to the shutdown command, controlling the first control valve and the second control valve to disconnect includes: According to the shutdown command, the indoor fan is controlled to run for a preset time and then shut down.

5. The control method according to claim 3 or 4, characterized in that, The preset duration is greater than or equal to the shortest pressure balance time.

6. The control method according to claim 3 or 4, characterized in that, The preset duration is greater than 0 seconds and less than or equal to 120 seconds.

7. The control method according to claim 1, characterized in that, The first control valve is located near the indoor heat exchanger, and / or the second control valve is located near the indoor heat exchanger.

8. A control device, characterized in that, include: Processor, and; A memory storing a computer program, which, when executed by the processor, implements the steps of the control method according to any one of claims 1-7.

9. An indoor unit for an air conditioner, characterized in that, Includes the control device as described in claim 8.

10. An air conditioner, characterized in that, Includes the air conditioner indoor unit as described in claim 9.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the control method according to any one of claims 1-7.

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