Indoor unit, refrigerant leakage fault control method, controller and air conditioning system

Abstract

The invention discloses an indoor unit, a refrigerant leakage fault control method, a controller and an air conditioning system, the indoor unit is connected with an outdoor unit through a temperature controller, and the indoor unit comprises a direct current power supply port used for being connected with a power interface of the temperature controller; the temperature control data module is used for outputting a control signal of the temperature controller to the outdoor unit, the signal input end of the temperature control data module is used for being connected with a data port of the temperature controller, and the signal output end of the temperature control data module is used for being connected with a data port of the outdoor unit; and the controller is configured to stop signal output of the temperature control data module in response to a first fault signal or a second fault signal, the first fault signal is a signal triggered when the refrigerant leakage sensor detects refrigerant leakage, and the second fault signal is a signal triggered when the indoor unit detects a fault of the refrigerant leakage sensor. On the premise of being compatible with the third-party temperature controller, the air conditioning system can respond to the refrigerant leakage fault.

Description

Technical Field

[0001] This application relates to the field of air conditioning system control technology, and in particular to a control method, controller and air conditioning system for indoor unit and refrigerant leakage faults. Background Technology

[0002] An air conditioning system typically consists of an indoor unit and an outdoor unit. The indoor unit acts as the control center, providing control to the outside world. Users can set parameters through the indoor thermostat, and the indoor unit will adjust the operation of the outdoor unit or other components according to the user-set parameters.

[0003] The indoor unit of an air conditioning system can operate in conjunction with a third-party outdoor unit. The outdoor and indoor units are connected to the third-party thermostat via a 24V signal input line to maintain consistent operation. However, the third-party thermostat may not support some functions of the indoor unit. For example, when the air conditioning system uses flammable refrigerant, a refrigerant leak or a refrigerant sensor malfunction may prevent the indoor unit from triggering the outdoor unit to stop via the third-party thermostat. Summary of the Invention

[0004] This application provides a method, controller, and air conditioning system for controlling indoor unit and refrigerant leakage faults, which enables the air conditioning system to respond to refrigerant leakage faults while being compatible with third-party thermostats.

[0005] In a first aspect, embodiments of this application provide a method for controlling refrigerant leakage faults, wherein the indoor unit is connected to the outdoor unit via a thermostat; the indoor unit includes:

[0006] A DC power supply port is used to connect to the power interface of the temperature controller;

[0007] The temperature control data module is used to output the control signal of the temperature controller to the outdoor unit. The signal input terminal of the temperature control data module is used to connect to the data port of the temperature controller, and the signal output terminal of the temperature control data module is used to connect to the data port of the outdoor unit.

[0008] The controller is configured as at least one of the following:

[0009] In response to the first fault signal, the signal output of the temperature control data module is stopped. The first fault signal is a signal triggered by the refrigerant leak sensor detecting a refrigerant leak.

[0010] In response to the second fault signal, the signal output of the temperature control data module is stopped. The second fault signal is a signal triggered by the indoor unit detecting a fault in the refrigerant leak sensor.

[0011] In some embodiments, the indoor unit further includes a fault output module, and the controller is further configured to output a first fault prompt message through the fault output module in response to the first fault signal, and is further configured to output a second fault prompt message through the fault output module in response to the second fault signal.

[0012] In some embodiments, the indoor unit further includes a DC voltage source, a switch module, and a first DIP switch, wherein the DC voltage source is connected to the DC power supply port via the switch module; the controller is further configured to control the switch module to disconnect according to a first DIP switch value.

[0013] In some embodiments, the temperature control data module includes a signal input module and a signal output module. The signal input module includes a signal input terminal, and the signal output module includes a signal output terminal. The port definitions of the signal input terminal, the data port of the temperature controller, and the signal output terminal correspond one-to-one, and the signal input module and the signal output module are communicatively connected.

[0014] In some embodiments, the indoor unit further includes a second DIP switch; the controller is also configured to, in response to a third fault signal, determine and output a third fault indication message based on a third DIP switch value, wherein the fault corresponding to the third fault signal is different from the fault corresponding to the first fault signal and the fault corresponding to the second fault signal.

[0015] Secondly, embodiments of this application provide a method for controlling refrigerant leakage faults, applied to an indoor unit as described in the first aspect above; the control method includes at least one of the following:

[0016] In response to the first fault signal, the signal output of the temperature control data module is stopped;

[0017] In response to the second fault signal, the signal output of the temperature control data module is stopped.

[0018] In some embodiments, the indoor unit further includes a fault output module; the control method further includes:

[0019] In response to the first fault signal, a first fault prompt message is output through the fault output module;

[0020] In response to the second fault signal, a second fault prompt message is output through the fault output module.

[0021] In some embodiments, the indoor unit further includes a DC voltage source, a switch module, and a first DIP switch, wherein the DC voltage source is connected to the DC power supply port via the switch module; stopping the signal output of the temperature control data module includes:

[0022] Determine the DIP switch value of the first DIP switch;

[0023] If the DIP switch is set to the first DIP value, an enable signal is sent to the temperature control data module, and the switch module is controlled to open. The enable signal is used to trigger the temperature control data module to stop signal output.

[0024] If the DIP switch value of the first DIP switch is the second DIP switch value, an enable signal is sent to the temperature control data module, and the switch module remains closed.

[0025] In some embodiments, the indoor unit further includes a second DIP switch; the control method further includes:

[0026] In response to a third fault signal, the DIP switch value of the second DIP switch is determined, wherein the fault corresponding to the third fault signal is different from the fault corresponding to the first fault signal and the fault corresponding to the second fault signal.

[0027] If the DIP switch value of the second DIP switch is the third DIP switch value, output the second fault prompt message;

[0028] If the second DIP switch is set to the fourth DIP switch value, the second fault message will not be output.

[0029] Thirdly, embodiments of this application provide a controller, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the refrigerant leakage fault control method as described in the second aspect.

[0030] Fourthly, embodiments of this application also provide an air conditioning system, including the indoor unit described in the first aspect or the controller described in the third aspect.

[0031] The indoor unit, refrigerant leakage fault control method, controller, and air conditioning system of this application embodiment have at least the following beneficial effects: The indoor unit of this application embodiment adds a temperature control data module. The indoor unit supplies power to the temperature control data module, and the signal input terminal of the temperature control data module is connected to the thermostat. The signal output terminal of the temperature control data module is connected to the data port of the outdoor unit. The temperature control data module acts as a control signal intermediary, outputting the control data received from the thermostat at the signal input terminal to the outdoor unit through the signal output terminal. When a refrigerant leak is detected or a refrigerant leak sensor malfunction is detected, the indoor unit responds to the first fault signal of the fault and controls the temperature control data module to stop signal output, thereby causing the outdoor unit to stop and promptly preventing further refrigerant leakage. Since the thermostat is not directly connected to the outdoor unit but is connected through the temperature control data module, even if the indoor unit is connected to a third-party thermostat, it can still control the outdoor unit to respond when a refrigerant leak fault is detected through the temperature control data module. This achieves compatibility with third-party thermostats while enabling the air conditioning system to respond to refrigerant leak faults.

[0032] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

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

[0034] Figure 2 This is a schematic diagram of another air conditioning system provided in an embodiment of this application;

[0035] Figure 3 This is a flowchart illustrating a method for stopping the signal output of a temperature control data module in response to a first fault signal, as provided in an embodiment of this application.

[0036] Figure 4 This is a flowchart of a refrigerant leakage fault control method provided in an embodiment of this application;

[0037] Figure 5 This is a flowchart of a refrigerant leakage fault control method provided in another embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the structure of a controller provided in an embodiment of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various implementations. Simultaneously, the steps or actions described in the method description can be rearranged or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0040] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0041] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0042] An air conditioning system typically consists of an indoor unit and an outdoor unit. The indoor unit acts as the control center, providing control to the outside world, and users can adjust the operation of the outdoor unit or other components by setting parameters through the indoor thermostat.

[0043] Air conditioning systems can be built by combining equipment from different manufacturers. These systems control individual indoor units via a 24V signal. When an indoor unit is paired with a third-party outdoor unit, the indoor and outdoor units cannot communicate. Typically, the indoor and outdoor units need to be connected to a third-party thermostat via a 24V signal input line to maintain consistent operation. However, third-party thermostats may not support some functions of the indoor unit. They usually do not have built-in refrigerant sensors. When the air conditioning system uses flammable refrigerant, a refrigerant leak or sensor malfunction requires the outdoor unit to shut down. Since the third-party thermostat lacks a built-in sensor, it will not switch to shutdown mode in case of a leak or sensor failure, and the outdoor unit will continue to run. Therefore, the indoor unit cannot trigger the outdoor unit to shut down via a third-party thermostat; current technology cannot meet this requirement.

[0044] Based on this, this application provides an indoor unit, a refrigerant leakage fault control method, a controller, and an air conditioning system. The indoor unit adds a temperature control data module, which supplies power to the module. The signal input terminal of the temperature control data module is connected to a thermostat, and the signal output terminal is connected to the data port of the outdoor unit. The temperature control data module acts as a control signal intermediary, transmitting the control data received from the thermostat at its signal input terminal to the outdoor unit via its signal output terminal. When a refrigerant leak is detected, triggering a first fault signal, or when a refrigerant leak sensor malfunction is detected, triggering a second fault signal, the indoor unit controls the temperature control data module to stop signal output, thereby shutting down the outdoor unit and preventing further refrigerant leakage. Since the thermostat is not directly connected to the outdoor unit but rather through the temperature control data module, even if the indoor unit is connected to a third-party thermostat, the outdoor unit can still be controlled to respond to a refrigerant leakage fault through the temperature control data module. This achieves compatibility with third-party thermostats while enabling the air conditioning system to respond to refrigerant leakage faults.

[0045] The following description, with reference to the accompanying diagrams, explains the control methods, controller, and air conditioning system for indoor unit and refrigerant leakage faults:

[0046] Reference Figure 1 As shown, Figure 1 This is a schematic diagram of an air conditioning system provided in an embodiment of this application. The air conditioning system includes an indoor unit and an outdoor unit, as well as a thermostat. The indoor unit is connected to the outdoor unit through the thermostat. The indoor unit is equipped with a DC power supply port, a temperature control data module, and a controller. The DC power supply port is used to connect to the power interface of the thermostat. The temperature control data module is used to output the control signal of the thermostat to the outdoor unit. The signal input terminal of the temperature control data module is used to connect to the data port of the thermostat, and the signal output terminal of the temperature control data module is used to connect to the data port of the outdoor unit. The controller is configured to stop the signal output of the temperature control data module in response to a first fault signal, which is a signal triggered by a refrigerant leak sensor detecting a refrigerant leak. The controller is also configured to stop the signal output of the temperature control data module in response to a second fault signal, which is a signal triggered by the indoor unit detecting a refrigerant leak sensor malfunction.

[0047] The indoor unit is equipped with a DC power supply port, which is essentially a DC voltage source. This port connects to the thermostat's power interface, providing DC power to the indoor unit for stable operation. The thermostat includes a data port. The signal input of the temperature control data module connects to this port, while its signal output connects to the outdoor unit's data port. The thermostat's control signal is transmitted through its data port to the temperature control data module's signal input and then through the module's signal output to the outdoor unit's data port. The air conditioning system also includes a refrigerant leak sensor. This sensor detects refrigerant leaks. If a leak is detected, the system sends a first fault signal; conversely, if the indoor unit detects a refrigerant leak sensor malfunction, the system sends a second fault signal. When the controller receives a first fault signal, it responds to either the first fault signal or the second fault signal by forcibly shutting off the signal output of the temperature control data module, thereby stopping the outdoor unit and preventing further refrigerant leakage.

[0048] In this embodiment, an additional temperature control data module is added to the indoor unit. The indoor unit supplies power to the temperature control data module, and the signal input terminal of the temperature control data module is connected to the thermostat. The signal output terminal of the temperature control data module is connected to the data port of the outdoor unit. The temperature control data module acts as a control signal intermediary, transmitting the control data received from the thermostat at the signal input terminal to the outdoor unit through the signal output terminal. When a refrigerant leak is detected, triggering a first fault signal, or when a refrigerant leak sensor malfunction is detected, triggering a second fault signal, the indoor unit controls the temperature control data module to stop signal output, thereby causing the outdoor unit to shut down and preventing further refrigerant leakage. Since the thermostat is not directly connected to the outdoor unit but rather through the temperature control data module, even if the indoor unit is connected to a third-party thermostat, it can still control the outdoor unit to respond in the event of a refrigerant leak fault through the temperature control data module. This achieves compatibility with third-party thermostats while enabling the air conditioning system to respond to refrigerant leak faults.

[0049] In some embodiments of this application, the indoor unit further includes a fault output module, and the controller is further configured to output a first fault prompt message through the fault output module in response to a first fault signal, and is further configured to output a second fault prompt message through the fault output module in response to a second fault signal.

[0050] A fault output module is installed in the indoor unit. This module communicates with the controller and outputs a fault alert message promptly upon detecting a fault. The refrigerant leak sensor continuously monitors for refrigerant leaks. When the sensor detects a leak, it generates a first fault signal; conversely, if the indoor unit detects a refrigerant leak, it generates a second fault signal. Upon receiving either the first or second fault signal, the controller stops outputting signals from the temperature control data module and sends a trigger signal to the fault output module. This triggers the module to output either the first fault signal (for the first fault) or the second fault signal (for the second fault).

[0051] In some embodiments of this application, the fault output module can be one of an alarm light, an audible alarm, or a display screen. When the fault output module is an alarm light, the controller responds to the first fault signal by flashing the alarm light to output a first fault indication message. When the fault output module is an audible alarm, the controller responds to the first fault signal by emitting a buzzer sound through the audible alarm to output the first fault indication message. When the fault output module is a display screen, the first fault indication message is displayed on the screen. When the controller responds to the first fault signal, the controller outputs the first fault indication message through the fault output module. The first fault indication message can be in the form of sound, visual, or text. The purpose of outputting the first fault indication message through the fault output module is to quickly notify the operator or maintenance personnel of the existence of the fault. Those skilled in the art can choose the type of fault output module according to the actual situation. This application does not limit the type of fault output module. Similarly, the second fault indication message can also be sent in the same way as the first fault indication message, and will not be repeated here.

[0052] In some embodiments of this application, a first fault indication message or a second fault indication message is output through a fault output module. The first fault indication message can be output passively or actively. A passive output typically refers to a simple switching signal that does not provide power; it simply indicates a fault indication message by closing or opening a circuit. The advantage of a passive output is its lower cost, but it requires additional power and control circuitry. An active output, on the other hand, refers to an output terminal capable of providing sufficient current or voltage to directly drive the fault output module, such as an alarm bell or warning light with a built-in power supply. This application does not limit the output format of the first and second fault indication messages.

[0053] Reference Figure 2 As shown, Figure 2This is a schematic diagram of another air conditioning system provided in the embodiments of this application. In some embodiments of this application, the indoor unit also includes a DC voltage source, a switch module and a first DIP switch (not shown in the figure). The DC voltage source is connected to the DC power supply port through the switch module. The controller is also configured to control the switch module to disconnect according to the first DIP switch value.

[0054] A DC voltage source provides a preset DC voltage. The output of the DC voltage source is connected to one end of a switching module, and the other end of the switching module is connected to a DC power supply port. The preset DC voltage output by the DC voltage source is transmitted to the DC power supply port through the switching module. Since the DC power supply port is connected to the power interface of the temperature controller, the preset DC voltage value output by the DC voltage source is transmitted to the temperature controller through the switching module and the DC power supply port, thus powering the temperature controller and ensuring its stable operation. It can be understood that the first DIP switch is an electronic switch, typically used in electronic devices to set parameters, adjust parameters, and configure device states. The first DIP switch consists of a series of small switches, each of which can be set to either closed or open. Typically, a value of 1 indicates that the first DIP switch is closed, and a value of 0 indicates that it is open. Therefore, the DIP switch values ​​include both 1 and 0.

[0055] When the controller receives a first fault signal, it indicates that the refrigerant leak sensor has detected a refrigerant leak. Alternatively, when the controller receives a second fault signal, it indicates that the indoor unit has detected a refrigerant leak sensor malfunction. In this case, the switch module needs to be disconnected to break the power supply circuit from the DC voltage source to the thermostat's power interface. In this embodiment, the controller is also configured to determine the value of the first DIP switch and control the state of the switch module based on that value. When the first DIP switch value is 0, the switch module is disconnected according to the first DIP switch value. Since the signal input terminals of the thermostat and the temperature control data module are connected, and the signal output terminal of the temperature control data module is connected to the outdoor unit's data port, the temperature control data module acts as a control signal intermediary. Therefore, when the switch module is disconnected, the temperature control data module is de-energized, stopping signal output and causing the outdoor unit to shut down, thus preventing further refrigerant leakage.

[0056] In another embodiment of this application, the controller is further configured to determine the value of the first DIP switch and control the state of the switch module according to the value of the first DIP switch. When the value of the first DIP switch is 1, the switch module is kept closed according to the first DIP switch value. Therefore, when the switch module is kept closed, the power supply circuit of the DC voltage source supplying power to the power interface of the thermostat through the switch module is turned on. The signal input terminals of the thermostat and the temperature control data module are connected, and the signal output terminal of the temperature control data module is connected to the data port of the outdoor unit. The temperature control data module acts as a control signal intermediary, and outputs the control data of the thermostat received by the signal input terminal to the outdoor unit through the signal output terminal.

[0057] In some embodiments of this application, the first DIP switch can be a mechanical switch, which needs to be manually moved to the first position or the second position to make the first DIP switch in a closed or open state; the first DIP switch can also be a binary coded switch, which uses different binary values ​​to represent the closed or open state of the first DIP switch. The embodiments of this application do not limit the selection of the first DIP switch, and those skilled in the art can set the type of the first DIP switch according to the actual situation.

[0058] In some embodiments of this application, the switching module is a relay, and the DC voltage source is connected to the DC power supply port through the relay. When the relay is closed, the power supply circuit from the DC voltage source to the DC power supply port is connected; when the relay is open, the power supply circuit from the DC voltage source to the DC power supply port is disconnected. This application does not limit the type of switching module; those skilled in the art can set the type of switching module according to actual conditions.

[0059] In some embodiments of this application, the DC voltage source is a 24V transformer. The 24V transformer converts the voltage output from the AC voltage source to 24V and outputs it to the temperature controller through a switching module to enable the temperature controller to function properly. This application does not limit the type of DC voltage source; those skilled in the art can set the type of DC voltage source according to actual conditions.

[0060] In some embodiments of this application, the temperature control data module includes a signal input module and a signal output module. The signal input module includes a signal input terminal, and the signal output module includes a signal output terminal. The port definitions of the signal input terminal, the data port of the temperature controller, and the signal output terminal correspond one-to-one, and the signal input module and the signal output module are connected in communication.

[0061] The temperature control data module comprises two parts: a signal input module and a signal output module. The data port of the thermostat is connected to the signal input terminal of the signal input module. The signal input module and the signal output module communicate with each other. The output terminal of the signal output module is connected to the outdoor unit. It should be noted that the port definitions of the thermostat's data port and the signal input terminal must correspond one-to-one to ensure that the signal output from the thermostat's data port can be correctly identified and processed by the signal input terminal of the signal input module. The signal input module and the signal output module require a communication connection, and the port definitions of the input terminal and the output terminal of the signal output module must correspond one-to-one to ensure that the signal from the input module is correctly sent to the output module. The signal input module and the signal output module may be implemented via a bus, serial communication, network, or other communication interface. The signal is transmitted to the outdoor unit through the signal output terminal of the output module. This application ensures accurate data transmission and reception by setting a one-to-one correspondence between the port definitions of the signal input terminal, the data port of the thermostat, and the signal output terminal.

[0062] Therefore, the temperature control data module acts as a transmission medium between the thermostat and the outdoor unit. When a refrigerant leak is detected or a refrigerant leak sensor malfunction is detected, the indoor unit controls the temperature control data module to stop signal output, thereby causing the outdoor unit to shut down and preventing further refrigerant leakage. Since the thermostat is not directly connected to the outdoor unit but rather through the temperature control data module, even if the indoor unit is connected to a third-party thermostat, it can still control the outdoor unit to respond in the event of a refrigerant leak. This achieves compatibility with third-party thermostats while enabling the air conditioning system to respond to refrigerant leaks.

[0063] In some embodiments of this application, the data ports of the thermostat include a G port, a Y1 port, a Y2 port, a B port, a W port, a W1 port, an AUX port, and a DH port. The input terminals of the input module include a G port, a Y1 port, a Y2 port, a B port, a W port, a W1 port, an AUX port, and a DH port. The port definitions of the data ports of the thermostat and the port definitions of the signal input terminals correspond one-to-one. Specifically, the G port of the thermostat is connected to the DH port of the input module, the Y1 port of the thermostat is connected to the AUX port of the input module, the Y2 port of the thermostat is connected to the W1 port of the input module, the B port of the thermostat is connected to the W port of the input module, the W port of the thermostat is connected to the B port of the input module, the W1 port of the thermostat is connected to the Y2 port of the input module, the AUX port of the thermostat is connected to the Y1 port of the input module, and the DH port of the thermostat is connected to the G port of the input module. The output modules include ports OY1, OY2, OB, OW, OW1, AUX, and DH. The Y1 port of the input module connects to the OY1 port of the output module; the Y2 port of the input module connects to the OY2 port of the output module; the B port of the input module connects to the OB port of the output module; the W port of the input module connects to the OW port of the output module; the W1 port of the input module connects to the OW1 port of the output module; the AUX port of the input module connects to the AUX port of the output module; and the DH port of the input module connects to the DH port of the output module. By setting a one-to-one correspondence between the port definitions of the signal input terminals, the port definitions of the thermostat's data ports, and the port definitions of the signal output terminals, the signals provided to the outdoor unit through the output terminals of the output module are synchronized with the input signals of the thermostat, ensuring accurate data transmission and reception.

[0064] In some embodiments of this application, the indoor unit further includes a second DIP switch (not shown); the controller is also configured to, in response to a third fault signal, determine to output a third fault indication message based on a third DIP value of the second DIP switch, the third fault signal being a signal triggered by detecting a fault different from the first fault signal and a fault different from the second fault signal.

[0065] The indoor unit also features a second DIP switch, an electronic switch typically used in electronic devices for setting and adjusting parameters, and configuring device status. The second DIP switch consists of a series of small switches, each capable of being either closed or open. Typically, a value of 1 indicates the second DIP switch is closed, and a value of 0 indicates it is open. Therefore, the second DIP switch has two possible values: 1 and 0.

[0066] It should be noted that the third fault signal is a signal triggered by detecting a fault different from the first fault signal and a fault different from the second fault signal. Since the first fault signal is triggered by the refrigerant leak sensor detecting a refrigerant leak, and the second fault signal is triggered by the indoor unit detecting a refrigerant leak sensor malfunction, the third fault signal is a signal triggered by any fault other than either the refrigerant leak sensor detecting a refrigerant leak or the indoor unit detecting a refrigerant leak sensor malfunction. In some embodiments, the third fault signal may be a signal triggered by detecting a heating element malfunction in the indoor unit, a signal triggered by detecting an overheated motor, or a signal triggered by detecting a fan malfunction. This application does not limit the type of the third fault signal.

[0067] When the controller receives a third fault signal, it indicates that the indoor unit has a fault other than refrigerant leakage or refrigerant leakage sensor failure. In response to the third fault signal, the controller determines the current third DIP switch value. When the current third DIP switch value is 1, the controller outputs a third fault prompt message based on the third DIP switch value. The third fault prompt message can be in the form of sound, vision, or text. The purpose of outputting the third fault prompt message is to quickly notify the operator or maintenance personnel of the existence of the fault.

[0068] By setting a second DIP switch in the indoor unit, when a third fault signal is triggered by a fault other than a refrigerant leak sensor detecting a refrigerant leak or a refrigerant leak sensor malfunction in the indoor unit, the second DIP switch outputs a third DIP value. The controller responds to the third fault signal and outputs a third fault prompt message based on the third DIP value of the second DIP switch. This allows operators or maintenance personnel to quickly know the existence of the fault based on the third fault prompt message, improving the visibility of fault occurrences during indoor unit operation.

[0069] This application also provides a method for controlling refrigerant leakage faults, applied to an indoor unit. The indoor unit is connected to an outdoor unit via a thermostat. The indoor unit includes a DC power supply port for connecting to the power interface of the thermostat; a temperature control data module for outputting control signals from the thermostat to the outdoor unit; the signal input terminal of the temperature control data module is connected to the data port of the thermostat; and the signal output terminal of the temperature control data module is connected to the data port of the outdoor unit.

[0070] In some embodiments of this application, the method for controlling refrigerant leakage faults includes, but is not limited to, step S100. Specifically,

[0071] Step S100: In response to the first fault signal, stop the signal output of the temperature control data module, and / or, in response to the second fault signal, stop the signal output of the temperature control data module.

[0072] The indoor unit is equipped with a refrigerant leak sensor that continuously monitors the refrigerant status. When a refrigerant leak is detected, or when the indoor unit detects a refrigerant leak sensor malfunction, a first fault signal is triggered. The controller responds to this first fault signal by stopping the signal output of the temperature control data module. Since the signal input terminal of the temperature control data module is connected to the data port of the thermostat, and the signal output terminal is connected to the data port of the outdoor unit, the temperature control data module acts as a control signal intermediary, outputting the received control data from the thermostat to the outdoor unit. When a refrigerant leak is detected, or when a refrigerant leak sensor malfunction is detected, the indoor unit responds to the first fault signal, controlling the temperature control data module to stop signal output, thereby causing the outdoor unit to shut down and preventing further refrigerant leakage.

[0073] Since the thermostat is not directly connected to the outdoor unit, but rather through a temperature control data module, even if the indoor unit is connected to a third-party thermostat, the outdoor unit can still be controlled to respond in the event of a refrigerant leak. This means that the air conditioning system can respond to refrigerant leaks while remaining compatible with third-party thermostats.

[0074] In some embodiments of this application, the indoor unit further includes a fault output module, which is communicatively connected to the controller. The fault output module is used to promptly output a fault warning message to provide feedback when a fault is detected. The method for controlling refrigerant leakage faults also includes, but is not limited to, step S200. Specifically,

[0075] Step S200: In response to the first fault signal, output a first fault prompt message through the fault output module, and / or, in response to the second fault signal, output a second fault prompt message through the fault output module.

[0076] In this application, a refrigerant leak sensor continuously monitors for refrigerant leaks. When the sensor detects a leak, it generates a first fault signal; conversely, when the indoor unit detects a refrigerant leak, it generates a second fault signal. Upon receiving either the first or second fault signal, the controller stops the temperature control data module's signal output and outputs a first fault warning message via the fault output module. The first and second fault warning messages can be in audio, visual, or text format. The purpose of outputting these messages via the fault output module is to quickly notify operators or maintenance personnel of the fault. Maintenance personnel can then perform corresponding repair or shutdown operations based on the first fault warning message output by the fault output module, ensuring the indoor unit operates normally.

[0077] Reference Figure 3 As shown, Figure 3This is a flowchart illustrating a method for stopping the signal output of a temperature control data module in response to a first fault signal and a second fault signal, according to an embodiment of this application. The method for stopping the signal output of the temperature control data module includes, but is not limited to, steps S110 to S130. Specifically,

[0078] Step S110: Determine the DIP switch value of the first DIP switch;

[0079] Step S120: If the DIP switch value is the first DIP value, send an enable signal to the temperature control data module and control the switch module to open. The enable signal is used to trigger the temperature control data module to stop signal output.

[0080] Step S130: If the DIP switch value of the first DIP switch is the second DIP switch value, send an enable signal to the temperature control data module and keep the switch module closed.

[0081] In some embodiments of this application, the indoor unit further includes a DC voltage source, a switch module, and a first DIP switch. The DC voltage source is connected to the DC power supply port through the switch module. The first DIP switch is an electronic switch, typically represented by a value of 1 indicating a closed state and a value of 0 indicating an open state. In response to a first fault signal, the DIP switch value is determined, and a corresponding operation is performed based on the DIP switch value. When the DIP switch value is the first DIP switch value (i.e., DIP switch value 0), an enable signal is sent to the temperature control data module, and the switch module is controlled to open. The enable signal is used to trigger the temperature control data module to stop signal output. When the DIP switch value is the second DIP switch value (i.e., DIP switch value 1), an enable signal is sent to the temperature control data module, and the switch module remains closed.

[0082] Because the signal input terminals of the thermostat and the temperature control data module are connected, and the signal output terminal of the temperature control data module is connected to the data port of the outdoor unit, the temperature control data module acts as an intermediary for control signals. Therefore, when the switch module is open, the temperature control data module is de-energized, thereby stopping signal output and causing the outdoor unit to shut down, thus preventing further refrigerant leakage. When the switch module remains closed, the power supply circuit from the DC voltage source to the thermostat's power interface is activated, and the temperature control data module outputs the control data received from the thermostat at its signal input terminal to the outdoor unit through its signal output terminal.

[0083] Reference Figure 4 As shown, Figure 4 This is a flowchart of a refrigerant leakage fault control method provided in an embodiment of this application. The refrigerant leakage fault control method includes, but is not limited to, steps S300 to S320. Specifically,

[0084] Step S300: In response to the third fault signal, determine the DIP switch value of the second DIP switch, wherein the fault corresponding to the third fault signal is different from the fault corresponding to the first fault signal and the fault corresponding to the second fault signal.

[0085] Step S310: If the DIP switch value of the second DIP switch is the third DIP switch value, output the third fault prompt message;

[0086] Step S320: If the DIP switch of the second DIP switch is set to the fourth DIP switch value, the third fault message will not be output.

[0087] In some embodiments of this application, the indoor unit further includes a second DIP switch. This second DIP switch is an electronic switch, typically represented by a value of 1 indicating a closed state and a value of 0 indicating an open state. Since the first fault signal is triggered by the refrigerant leak sensor detecting a refrigerant leak, and the second fault signal is triggered by the indoor unit detecting a fault in the refrigerant leak sensor, a third fault signal is triggered when a fault other than the refrigerant leak sensor detecting a refrigerant leak or the indoor unit detecting a fault in the refrigerant leak sensor is detected. The controller responds to the third fault signal, determines the current DIP switch value, and then performs the corresponding operation based on the current DIP switch value. When the second DIP switch value is the third DIP switch value (i.e., a value of 1), a third fault indication message is output, notifying the operator or maintenance personnel of the existence of the fault. This allows the operator or maintenance personnel to quickly understand the existence of the fault based on the third fault indication message, improving the visibility of fault occurrences during indoor unit operation. When the second DIP switch value is the fourth DIP switch value (i.e., a value of 0), no third fault indication message is output.

[0088] The following example illustrates in detail the refrigerant leakage control method of this application.

[0089] Reference Figure 5 As shown, Figure 5This is a flowchart of a refrigerant leakage fault control method provided in another embodiment of this application. The refrigerant leakage fault control method includes: firstly, determining whether the air conditioning system has malfunctioned; if the air conditioning system has malfunctioned, and the malfunction is refrigerant leakage or a refrigerant leakage sensor malfunction is detected, the controller stops the signal output of the temperature control data module, thereby causing the outdoor unit to stop. Furthermore, the controller outputs a first fault warning message or a second fault warning message through the fault output module according to the fault type, enabling operators or maintenance personnel to quickly know the existence of the fault based on the first and second fault warning messages, improving the visibility of fault occurrence during indoor unit operation. The controller also determines the DIP switch value and selects whether to disconnect the output of the temperature control data module based on the DIP switch value. When the current DIP switch value is the first DIP switch value, an enable signal is sent to the temperature control data module to trigger the temperature control data module to stop signal output. Additionally, the control switch module is disconnected, and the power supply circuit of the DC voltage source supplying power to the temperature controller's power interface through the switch module is disconnected, thereby disconnecting the power supply to the temperature controller. When the current DIP switch value of the first DIP switch is the second DIP switch value, an enable signal is sent to the temperature control data module, and the switch module remains closed. The power supply circuit of the DC voltage source to the power interface of the temperature controller is turned on through the switch module. The DC voltage source still provides voltage to the temperature controller to ensure that the temperature controller works normally. The temperature control data module outputs the control data of the temperature controller received at the signal input terminal to the outdoor unit through the signal output terminal.

[0090] If the air conditioning system malfunctions, and the malfunction is other than a refrigerant leak or a faulty refrigerant leak sensor, the switch module remains closed. The power supply circuit of the DC voltage source, which supplies power to the thermostat's power interface through the switch module, remains open, ensuring the thermostat continues to operate normally. The temperature control data module includes an input module and an output module. The signal input module and the signal output module are interconnected. The port definitions of the signal input terminals of the input module, the data ports of the thermostat, and the signal output terminals correspond one-to-one, ensuring accurate data transmission and reception. This allows the temperature control data module to output the control data received from the thermostat at the signal input terminals to the outdoor unit through the signal output terminals. While the switch module remains closed, a third fault signal is sent. The controller responds to the third fault signal, determines the DIP switch value, and selects whether to output a third fault warning message based on the DIP switch value. When the current DIP switch value of the second switch is the third DIP switch value, a third fault message is output, thereby notifying the operator or maintenance personnel of the existence of the fault. This allows the operator or maintenance personnel to quickly identify the fault based on the third fault message, improving the visibility of fault occurrences during indoor unit operation. When the current DIP switch value of the second switch is the fourth DIP switch value, no third fault message is output. In essence, the DIP switch value determines whether the air conditioner can only output alarms related to refrigerant leaks (i.e., the first and second fault messages). When the third DIP switch value is active, the air conditioner is allowed to issue alarms not related to refrigerant leaks (i.e., the third fault message). When the fourth DIP switch value is active, even if a fault not related to refrigerant leaks occurs, the air conditioner will not issue an alarm. In other words, the setting of the second DIP switch provides the user with options for the alarm output method.

[0091] If the air conditioning system is not malfunctioning, the switch module remains closed. The power supply circuit of the DC voltage source, which supplies power to the thermostat's power interface through the switch module, is open, ensuring the thermostat continues to provide voltage and operate normally. The temperature control data module includes an input module and an output module. The signal input module and the signal output module are interconnected. The port definitions of the signal input terminal of the input module, the data port definitions of the thermostat, and the signal output terminal correspond one-to-one, ensuring accurate data transmission and reception. This allows the temperature control data module to output the control data received from the thermostat at the signal input terminal to the outdoor unit through the signal output terminal.

[0092] In this embodiment, when a refrigerant leak or a refrigerant leak sensor malfunction is detected, the indoor unit responds to the first or second fault signal of the fault by controlling the temperature control data module to stop signal output, thereby causing the outdoor unit to shut down, thus preventing further refrigerant leakage. The indoor unit also outputs a first or second fault warning message through the fault output module. In response to a third fault signal triggered by detecting a fault different from the first fault signal, the indoor unit determines the DIP switch value and selects whether to output the third fault signal based on that value. In this embodiment, a temperature control data module is added to the indoor unit. The indoor unit supplies power to the temperature control data module, and the signal input terminal of the temperature control data module is connected to the thermostat. The signal output terminal of the temperature control data module is connected to the data port of the outdoor unit. The temperature control data module acts as a control signal intermediary, outputting the control data received from the thermostat at its signal input terminal to the outdoor unit through its signal output terminal. Since the thermostat is not directly connected to the outdoor unit, but rather through a temperature control data module, even if the indoor unit is connected to a third-party thermostat, the outdoor unit can still be controlled to respond in the event of a refrigerant leak. This means that the air conditioning system can respond to refrigerant leaks while remaining compatible with third-party thermostats.

[0093] Embodiments of this application also provide a controller, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform a refrigerant leakage fault control method as described above.

[0094] Embodiments of this application also provide an air conditioning system, including the controller described in the above embodiments.

[0095] like Figure 6 As shown, Figure 6 This is a schematic diagram of a controller 1000 provided in one embodiment of this application.

[0096] The controller 1000 in this embodiment includes one or more processors 1001 and a memory 1002. Figure 6 The example uses a processor 1001 and a memory 1002.

[0097] Processor 1001 and memory 1002 can be connected via a bus or other means. Figure 6 Taking the example of a connection between China and Israel via a bus.

[0098] Memory 1002, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 1002 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 1002 may optionally include memory 1002 remotely located relative to processor 1001, and these remote memories can be connected to controller 1000 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0099] Those skilled in the art will understand that Figure 6 The device structure shown does not constitute a limitation on the controller 1000 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0100] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0101] The non-transient software program and instructions required to implement the lighting control method of the above embodiments are stored in memory and executed by the processor, thus executing the above embodiments.

[0102] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network nodes. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0103] Furthermore, one embodiment of this application provides a computer-readable storage medium storing computer-executable instructions that are executed by a processor or controller 1000.

[0104] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0105] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed systems, instruments, and methods can be implemented in other ways. For example, the instrument embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between instruments or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0107] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0108] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An indoor unit, characterized in that, The indoor unit is connected to the outdoor unit via a thermostat; the indoor unit includes: A DC power supply port is used to connect to the power interface of the temperature controller; The temperature control data module is used to output the control signal of the temperature controller to the outdoor unit. The signal input terminal of the temperature control data module is used to connect to the data port of the temperature controller, and the signal output terminal of the temperature control data module is used to connect to the data port of the outdoor unit. The controller is configured as at least one of the following: In response to the first fault signal, the signal output of the temperature control data module is stopped. The first fault signal is a signal triggered by the refrigerant leak sensor detecting a refrigerant leak. In response to the second fault signal, the signal output of the temperature control data module is stopped. The second fault signal is a signal triggered by the indoor unit detecting a fault in the refrigerant leak sensor.

2. The indoor unit according to claim 1, characterized in that, The indoor unit also includes a fault output module, and the controller is further configured to output a first fault prompt message through the fault output module in response to the first fault signal, and is further configured to output a second fault prompt message through the fault output module in response to the second fault signal.

3. The indoor unit according to claim 1, characterized in that, The indoor unit also includes a DC voltage source, a switch module, and a first DIP switch. The DC voltage source is connected to the DC power supply port through the switch module. The controller is also configured to control the switch module to disconnect according to a first DIP switch value.

4. The indoor unit according to claim 1, characterized in that, The temperature control data module includes a signal input module and a signal output module. The signal input module includes a signal input terminal, and the signal output module includes a signal output terminal. The port definitions of the signal input terminal, the data port of the temperature controller, and the port definitions of the signal output terminal are in one-to-one correspondence. The signal input module and the signal output module are connected in communication.

5. The indoor unit according to claim 1, characterized in that, The indoor unit also includes a second DIP switch; the controller is further configured to respond to a third fault signal and determine, based on the third DIP switch value, to output a third fault indication message, wherein the fault corresponding to the third fault signal is different from the fault corresponding to the first fault signal and the fault corresponding to the second fault signal.

6. A method for controlling refrigerant leakage faults, characterized in that, Applied to an indoor unit as described in any one of claims 1 to 5; the control method includes at least one of the following: In response to the first fault signal, the signal output of the temperature control data module is stopped; In response to the second fault signal, the signal output of the temperature control data module is stopped.

7. The method according to claim 6, characterized in that, The indoor unit also includes a fault output module; the control method further includes: In response to the first fault signal, a first fault prompt message is output through the fault output module; In response to the second fault signal, a second fault prompt message is output through the fault output module.

8. The method according to claim 6, characterized in that, The indoor unit also includes a DC voltage source, a switch module and a first DIP switch, wherein the DC voltage source is connected to the DC power supply port through the switch module; The step of stopping the signal output of the temperature control data module includes: Determine the DIP switch value of the first DIP switch; If the DIP switch is set to the first DIP value, an enable signal is sent to the temperature control data module, and the switch module is controlled to open. The enable signal is used to trigger the temperature control data module to stop signal output. If the DIP switch value of the first DIP switch is the second DIP switch value, an enable signal is sent to the temperature control data module, and the switch module remains closed.

9. The method according to claim 6, characterized in that, The indoor unit also includes a second DIP switch; the control method further includes: In response to a third fault signal, the DIP switch value of the second DIP switch is determined, wherein the fault corresponding to the third fault signal is different from the fault corresponding to the first fault signal and the fault corresponding to the second fault signal. If the DIP switch value of the second DIP switch is the third DIP switch value, output a third fault prompt message; If the second DIP switch is set to the fourth DIP switch value, the third fault message will not be output.

10. A controller, characterized in that, It includes at least one processor and a memory for communicatively connecting with said at least one processor; The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the refrigerant leakage fault control method as described in any one of claims 6 to 9.

11. An air conditioning system, characterized in that, Includes the indoor unit as described in any one of claims 1 to 5 or the controller as described in claim 10.

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