Air conditioners and their control methods, devices, storage media and computer programs

Abstract

This invention discloses a control method, device, air conditioner, storage medium, and computer program product for an air conditioner. The method includes: when the air conditioner is turned on in the current mode, controlling the main valve of the first and second electronic expansion valves to throttle and the pilot valve to be fully open; acquiring the temperature of the controller module, and acquiring the condenser outlet temperatures of the outdoor unit heat exchanger and the indoor unit heat exchanger; determining whether there is a wiring sequence error fault in the controller module and the first and second electronic expansion valves based on the temperature of the controller module and the condenser outlet temperatures; and, if a wiring sequence error fault is determined in the controller module and the first and second electronic expansion valves, issuing a prompt message to prompt reconnection. This solution improves the reliability of components in the electrical box and extends the service life of the air conditioner by detecting whether the wiring sequence of the dual-valve controller of the first and second electronic expansion valves is abnormal.

Description

Technical Field

[0001] This invention belongs to the field of air conditioner technology, specifically relating to an air conditioner control method, device, air conditioner, storage medium, and computer program product, and particularly to an air conditioner dual-valve controller line sequence self-test method, device, air conditioner, storage medium, and computer program product. Background Technology

[0002] In the relevant solutions, when testing whether the electronic expansion valve of the air conditioner is faulty, parameters such as system pressure and temperature are used to determine whether the electronic expansion valve is faulty. However, the solution does not consider that when the wiring sequence of the dual-valve controller is switched, the throttling of the electronic expansion valve will cause the heat pipe to cool down, which will eventually cause the hot surface of the components in the electrical box to condense water, resulting in electrical safety hazards such as board burning.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, air conditioner, storage medium, and computer program product for an air conditioner, in order to solve the problem that in related solutions, the determination of whether the electronic expansion valve is faulty is based on parameters such as system pressure and temperature, without considering that the cooling pipe will cool down due to throttling when the wiring sequence of the dual-valve controller is changed, which may lead to electrical safety hazards for the components in the electrical box. The invention achieves the effect of determining whether the wiring sequence of the dual-valve controller is abnormal by judging whether the temperature of the controller module of the dual-valve controller is abnormal, thereby improving the reliability of the components in the electrical box and extending the service life of the air conditioner.

[0005] This invention provides a control method for an air conditioner, the air conditioner having an outdoor unit and an indoor unit, the outdoor unit having an outdoor heat exchanger, the indoor unit having an indoor heat exchanger, a first electronic expansion valve, a second electronic expansion valve, and an electrical box, the electrical box having a control board, the control board having a controller module; the first electronic expansion valve, the controller module, and the second electronic expansion valve are sequentially disposed between the outdoor heat exchanger and the indoor heat exchanger; the control method for the air conditioner includes: when the air conditioner is powered on and turned on in the current mode, controlling the main valve of the first electronic expansion valve and the second electronic expansion valve to throttle, and the pilot valve to fully open... Turn on; when the air conditioner is running in the current mode, obtain the temperature of the controller module, and obtain the temperature of the condenser outlet of the outdoor unit heat exchanger and the indoor unit heat exchanger; based on the temperature of the controller module and the temperature of the condenser outlet, determine whether there is a wiring sequence error fault in the connection terminals of the controller module and the first electronic expansion valve and the second electronic expansion valve on the control board inside the electrical box; and, if it is determined that there is a wiring sequence error fault in the connection terminals of the controller module and the first electronic expansion valve and the second electronic expansion valve on the control board inside the electrical box, initiate a prompt message to prompt reconnection.

[0006] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. When the air conditioner is powered on and turned on in the current mode, controlling the main valve of the first electronic expansion valve and the second electronic expansion valve to throttle and the pilot valve to fully open includes: after the air conditioner is powered on and turned on in cooling mode, determining the second electronic expansion valve as the main valve and controlling the main valve to throttle according to the throttling method in cooling mode; determining the first electronic expansion valve as the pilot valve and controlling the pilot valve to fully open; after the air conditioner is powered on and turned on in heating mode, determining the first electronic expansion valve as the main valve and controlling the main valve to throttle according to the throttling method in heating mode; determining the second electronic expansion valve as the pilot valve and controlling the pilot valve to fully open.

[0007] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. When the air conditioner is operating in the current mode, acquiring the temperature of the controller module and the condenser outlet temperatures of the outdoor unit heat exchanger and the indoor unit heat exchanger includes: acquiring the temperature of the controller module when the air conditioner is operating in cooling mode; acquiring the refrigerant temperature at the outlet of the outdoor unit heat exchanger as the condenser outlet temperature; and acquiring the temperature of the controller module when the air conditioner is operating in heating mode; and acquiring the refrigerant temperature at the outlet of the indoor unit heat exchanger as the condenser outlet temperature.

[0008] In some embodiments, the current operating mode of the air conditioner is the cooling mode. Determining whether there is a wiring sequence error at the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box, based on the temperature of the controller module and the condenser outlet temperature, includes: when the air conditioner is operating in cooling mode, determining the difference between the temperature of the controller module and the condenser outlet temperature, denoted as the first difference of the air conditioner; determining whether the first difference of the air conditioner is greater than or equal to a preset cooling temperature difference threshold; if the first difference of the air conditioner is greater than or equal to the preset cooling temperature difference threshold, then the wiring sequence of the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box is correct; if the first difference of the air conditioner is less than the preset cooling temperature difference threshold, then the wiring sequence of the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box is incorrect.

[0009] In some embodiments, the current operating mode of the air conditioner is the heating mode. Determining whether there is a wiring sequence error at the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box, based on the temperature of the controller module and the condenser outlet temperature, includes: when the air conditioner is operating in heating mode, determining the difference between the temperature of the controller module and the condenser outlet temperature, denoted as the second difference of the air conditioner; determining whether the second difference of the air conditioner is greater than or equal to a preset heating temperature difference threshold; if the first difference of the air conditioner is determined to be greater than or equal to the preset heating temperature difference threshold, then the wiring sequence of the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box is determined to be correct; if the first difference of the air conditioner is determined to be less than the preset heating temperature difference threshold, then the wiring sequence of the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box is determined to be incorrect.

[0010] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. If a fault is determined to exist in the wiring sequence of the controller module and the first and second electronic expansion valves on the control board inside the electrical box, a prompt message is initiated to prompt for rewiring. This includes: when the air conditioner is operating in cooling mode, if a fault is determined to exist in the wiring sequence of the controller module and the first and second electronic expansion valves on the control board inside the electrical box, a prompt message is initiated to prompt for rewiring; and after rewiring, if it is determined that the difference between the temperature of the controller module and the temperature of the condenser outlet is greater than or equal to... If a preset cooling temperature difference threshold is established, the wiring sequence of the connector terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box is confirmed to be correct. If, when the air conditioner is operating in heating mode, a wiring sequence error is detected at the connector terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box, a prompt message is sent to prompt for reconnection. After reconnection, if the difference between the temperature of the controller module and the temperature at the condenser outlet is greater than or equal to the preset heating temperature difference threshold, the wiring sequence of the connector terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box is confirmed to be correct.

[0011] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioner, the air conditioner having an outdoor unit and an indoor unit, the outdoor unit having an outdoor unit heat exchanger, the indoor unit having an indoor unit heat exchanger, a first electronic expansion valve, a second electronic expansion valve, and an electrical box, the electrical box having a control board, the control board having a controller module; the first electronic expansion valve, the controller module, and the second electronic expansion valve are sequentially disposed between the outdoor unit heat exchanger and the indoor unit heat exchanger; the control device for the air conditioner includes: when the air conditioner is powered on and turned on in the current mode, controlling the main valve section of the first electronic expansion valve and the second electronic expansion valve. The system operates with the pilot valve fully open; when the air conditioner is running in the current mode, it acquires the temperature of the controller module and the condenser outlet temperatures of the outdoor unit heat exchanger and the indoor unit heat exchanger; based on the temperature of the controller module and the condenser outlet temperature, it determines whether there is a wiring sequence error at the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box; and, if it is determined that there is a wiring sequence error at the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box, it initiates a prompt message to prompt for reconnection.

[0012] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. The control unit, when the air conditioner is powered on and turned on in the current mode, controls the main valve of the first electronic expansion valve and the pilot valve of the second electronic expansion valve to throttle and fully open, including: after the air conditioner is powered on and turned on in cooling mode, determining the second electronic expansion valve as the main valve and controlling the main valve to throttle according to the throttling method in cooling mode; determining the first electronic expansion valve as the pilot valve and controlling the pilot valve to fully open; after the air conditioner is powered on and turned on in heating mode, determining the first electronic expansion valve as the main valve and controlling the main valve to throttle according to the throttling method in heating mode; determining the second electronic expansion valve as the pilot valve and controlling the pilot valve to fully open.

[0013] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. The acquisition unit, when the air conditioner is operating in the current mode, acquires the temperature of the controller module and the condenser outlet temperatures of the outdoor unit heat exchanger and the indoor unit heat exchanger, including: when the air conditioner is operating in cooling mode, acquiring the temperature of the controller module; acquiring the refrigerant temperature at the outlet of the outdoor unit heat exchanger as the condenser outlet temperature; when the air conditioner is operating in heating mode, acquiring the temperature of the controller module; and acquiring the refrigerant temperature at the outlet of the indoor unit heat exchanger as the condenser outlet temperature.

[0014] In some embodiments, the current operating mode of the air conditioner is the cooling mode. The control unit determines whether there is a wiring sequence error in the connector terminals of the controller module and the first and second electronic expansion valves on the control board inside the electrical box, based on the temperature of the controller module and the temperature of the condenser outlet. This includes: when the air conditioner is operating in cooling mode, determining the difference between the temperature of the controller module and the temperature of the condenser outlet, denoted as the first difference of the air conditioner; determining whether the first difference of the air conditioner is greater than or equal to a preset cooling temperature difference threshold; if the first difference of the air conditioner is greater than or equal to the preset cooling temperature difference threshold, then the wiring sequence of the connector terminals of the controller module and the first and second electronic expansion valves on the control board inside the electrical box is determined to be correct; if the first difference of the air conditioner is less than the preset cooling temperature difference threshold, then the wiring sequence of the connector terminals of the controller module and the first and second electronic expansion valves on the control board inside the electrical box is determined to be incorrect.

[0015] In some embodiments, the current operating mode of the air conditioner is the heating mode. The control unit determines whether there is a wiring sequence error in the connector terminals of the controller module and the first and second electronic expansion valves on the control board inside the electrical box, based on the temperature of the controller module and the temperature of the condenser outlet. This includes: when the air conditioner is operating in heating mode, determining the difference between the temperature of the controller module and the temperature of the condenser outlet, denoted as the second difference of the air conditioner; determining whether the second difference of the air conditioner is greater than or equal to a preset heating temperature difference threshold; if the first difference of the air conditioner is determined to be greater than or equal to the preset heating temperature difference threshold, then the wiring sequence of the connector terminals of the controller module and the first and second electronic expansion valves on the control board inside the electrical box is determined to be correct; if the first difference of the air conditioner is determined to be less than the preset heating temperature difference threshold, then the wiring sequence of the connector terminals of the controller module and the first and second electronic expansion valves on the control board inside the electrical box is determined to be incorrect.

[0016] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. The control unit, upon determining a wiring sequence error at the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box, initiates a prompt message to prompt rewiring. This includes: when the air conditioner is operating in cooling mode, if a wiring sequence error is determined at the connection terminals of the controller module, the first electronic expansion valve, and the second electronic expansion valve on the control board inside the electrical box, a prompt message is initiated to prompt rewiring; and after rewiring, if it is determined that the temperature difference between the controller module and the condenser outlet temperature is large... If the temperature difference between the controller module and the first and second electronic expansion valves is greater than or equal to the preset cooling temperature difference threshold, then the wiring sequence of the connector terminals on the control board inside the electrical box is determined to be correct. If, when the air conditioner is operating in heating mode, a wiring sequence error is determined at the connector terminals on the control board inside the electrical box, a prompt message is sent to prompt for reconnection. After reconnection, if the temperature difference between the controller module and the condenser outlet is greater than or equal to the preset heating temperature difference threshold, then the wiring sequence of the connector terminals on the control board inside the electrical box is determined to be correct.

[0017] In conjunction with the above-described device, the present invention further provides an air conditioner, comprising: the control device for the air conditioner described above.

[0018] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the steps of the control method for the air conditioner described above.

[0019] In conjunction with the above method, the present invention further provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for the air conditioner described above.

[0020] Therefore, the solution of this invention is for an air conditioner with a compressor, an indoor unit heat exchanger, a first electronic expansion valve, a second electronic expansion valve, and an electrical box on the indoor side, and an outdoor unit heat exchanger on the outdoor side. During cooling operation, the second electronic expansion valve is used as the main valve, and the first electronic expansion valve is used as the pilot valve, controlling the pilot valve to be fully open. The temperature difference between the controller module temperature in the electrical box and the refrigerant temperature at the outlet of the outdoor unit heat exchanger is used to determine if the controller module temperature is abnormal, thereby determining if the first and second electronic expansion valves are wired incorrectly. During heating operation, the first electronic expansion valve is used as the main valve, and the second electronic expansion valve is used as the pilot valve, controlling the pilot valve to be fully open. The temperature difference between the controller module temperature in the electrical box and the refrigerant temperature at the outlet of the indoor unit heat exchanger is used to determine if the controller module temperature is abnormal, thereby determining if the first and second electronic expansion valves are wired incorrectly. Thus, by determining if the temperature of the controller module of the dual-valve controller is abnormal, the wiring sequence of the dual-valve controller is determined to be abnormal, improving the reliability of the components in the electrical box and extending the service life of the air conditioner.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0022] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0024] Figure 2 This is a flowchart illustrating an embodiment of the method of the present invention for determining, in the cooling mode, whether there is a fault in the wiring sequence of the connector terminals of the first electronic expansion valve and the second electronic expansion valve on the control board inside the electrical box;

[0025] Figure 3This is a flowchart illustrating an embodiment of the method of the present invention for determining, in heating mode, whether there is a fault in the wiring sequence of the connector terminals of the first electronic expansion valve and the second electronic expansion valve on the control board inside the electrical box;

[0026] Figure 4 This is a schematic diagram of the structure of an embodiment of the control device for an air conditioner according to the present invention;

[0027] Figure 5 This is a schematic diagram of the air conditioner's structure;

[0028] Figure 6 This is a schematic diagram of the control flow for the self-test method of the dual-valve controller of an air conditioner.

[0029] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0030] 1-Four-way valve; 21-First electronic expansion valve (e.g., electronic expansion valve A); 22-Second electronic expansion valve (e.g., electronic expansion valve B); 3-Controller module; 4-Refrigerant heat dissipation pipe; 51-First temperature sensing device (e.g., external pipe temperature sensing device); 52-Second temperature sensing device (e.g., internal pipe temperature sensing device); 102-Acquisition unit; 104-Control unit. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] Some solutions offer fault detection methods for air conditioners. After the electronic expansion valve opens to the target opening and operates for a period of time, the system pressure and exhaust temperature are monitored. If the changes in pressure and exhaust temperature do not match the target opening, a fault in the electronic expansion valve is determined. Other solutions provide methods for detecting the electronic expansion valve, determining its detection information based on the change in its opening and the exhaust temperature correction. These solutions all determine whether the electronic expansion valve is faulty based on parameters such as system pressure and temperature. However, they do not consider the possibility of switching the wiring sequence of a dual-valve controller. While this may not affect system operation or cause abnormal pressure and exhaust parameters, it can lead to throttling, causing the heat sink to cool down. This can result in condensation on the hot surfaces of components inside the electrical box, potentially causing electrical safety hazards such as circuit board burn-out.

[0033] The wiring sequence for the dual-valve controller refers to the connection between the coil lead of the electronic expansion valve and the terminal on the control board. The dual valve consists of two valves, A and B, with two corresponding terminals. If the terminals are represented by a and b, then the wire for valve A is inserted into terminal a, and the wire for valve B is inserted into terminal b. The wiring sequence swapping refers to the situation where the corresponding terminals are inserted incorrectly, i.e., the wire for valve A is inserted into terminal b, and the wire for valve B is inserted into terminal a. This mainly occurs when wiring is incorrectly connected during the production stage.

[0034] Therefore, the present invention proposes a control method for an air conditioner, specifically a self-test method for the wiring sequence of a dual-valve controller in an air conditioner, which detects the temperature t of the controller module 3 of the dual-valve controller. 模块 The temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the temperature t of controller module 3 will affect the temperature t of the controller module 3. 模块 The temperature t of controller module 3 is determined by comparing the temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference Δt0. 模块 To check for any abnormalities, the dual-valve controller wiring sequence is self-tested. Through this self-testing method, potential electrical safety hazards are avoided at the source, and the reliability of air conditioner components is improved.

[0035] According to embodiments of the present invention, a control method for an air conditioner is provided, such as... Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The air conditioner has an outdoor unit and an indoor unit. The outdoor unit has an outdoor heat exchanger, and the indoor unit has an indoor heat exchanger, a first electronic expansion valve 21, a second electronic expansion valve 22, and an electrical box. The electrical box has a control board, and the control board has a controller module 3. The first electronic expansion valve 21, the controller module 3, and the second electronic expansion valve 22 are sequentially arranged between the outdoor heat exchanger and the indoor heat exchanger. Specifically, the electrical box contains the control board, and the controller module 3 is embedded within the control board. When the air conditioner is running, the controller module 3 generates heat due to the current flowing through it, causing its temperature to rise. The electrical box is in close contact with the refrigerant heat dissipation pipe 4, which is located between the first expansion valve 21 and the second expansion valve 22. After passing through the first expansion valve 21 (pilot valve), the refrigerant temperature remains essentially unchanged, but after passing through the electrical box, the temperature increases. Figure 5 This is a structural diagram of an air conditioner. Figure 5The air conditioner shown includes an indoor side and an outdoor side. The indoor side of the air conditioner mainly consists of a compressor, a four-way valve 1, an electrical box, an indoor unit heat exchanger, and a throttling device. The outdoor side of the air conditioner mainly consists of an outdoor unit heat exchanger and an axial flow fan system. In the present invention, the throttling device is controlled by dual expansion valves, which include a first electronic expansion valve 21 (e.g., electronic expansion valve A) and a second electronic expansion valve 22 (e.g., electronic expansion valve B). The compressor's exhaust port is connected to the first valve port of the four-way valve 1. The second valve port of the four-way valve 1 is connected to the fourth valve port of the four-way valve 1 after passing through the outdoor unit heat exchanger, the first electronic expansion valve 21, the refrigerant heat dissipation pipe 4, the controller module 3, the second electronic expansion valve 22, and the indoor unit heat exchanger. The third valve port of the four-way valve 1 is connected to the compressor's suction port after passing through the liquid receiver tank.

[0036] Specifically, during the refrigeration cycle, the first and second valve ports of the four-way valve 1 are connected, and the third and fourth valve ports are connected; the compressor's discharge port is connected to the first valve port of the four-way valve 1, and the first and second valve ports are connected; the second valve port of the four-way valve 1 is connected to the fourth valve port of the four-way valve 1 after passing through the outdoor unit heat exchanger, the first electronic expansion valve 21, the refrigerant heat dissipation pipe 4, the controller module 3, the second electronic expansion valve 22, and the indoor unit heat exchanger, and the fourth and third valve ports are connected; the third valve port of the four-way valve 1 is connected to the compressor's suction port after passing through the liquid receiver tank.

[0037] During the heating cycle, the first and fourth valve ports of the four-way valve 1 are connected, and the second and third valve ports are connected; the compressor's discharge port is connected to the first valve port of the four-way valve 1, and the first and fourth valve ports are connected; the fourth valve port of the four-way valve 1 is connected to the second valve port of the four-way valve 1 after passing through the indoor unit heat exchanger, the second electronic expansion valve 22, the refrigerant heat dissipation pipe 4, the controller module 3, the first electronic expansion valve 21, and the outdoor unit heat exchanger, and the second and third valve ports are connected; the third valve port of the four-way valve 1 is connected to the compressor's suction port after passing through the liquid receiver tank.

[0038] In the solution of the present invention, such as Figure 1 As shown, the control method of the air conditioner includes steps S110 to S140.

[0039] In step S110, when the air conditioner is powered on and turned on in the current mode, the main valve of the first electronic expansion valve 21 and the second electronic expansion valve 22 is throttled and the pilot valve is fully opened.

[0040] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. In step S110, when the air conditioner is powered on and turned on in the current mode, controlling the main valve of the first electronic expansion valve 21 and the second electronic expansion valve 22 to throttle and the pilot valve to be fully open includes any of the following control scenarios:

[0041] The first control scenario: After the air conditioner is powered on and turned on in cooling mode, the second electronic expansion valve 22 is determined to be the main valve, and the main valve is controlled to throttle in the throttling mode; the first electronic expansion valve 21 is determined to be the pilot valve, and the pilot valve is controlled to be fully open. Figure 6 This is a schematic diagram of the control flow for the self-test method of the dual-valve controller in an air conditioner. (Example:) Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner includes: Step 11, when the air conditioner is running in cooling mode, the main valve is electronic expansion valve B, and the pilot valve A (i.e., the pilot valve is electronic expansion valve A) is fully open and not throttled.

[0042] The second control scenario: After the air conditioner is powered on and turned on in heating mode, the first electronic expansion valve 21 is determined to be the main valve, and the main valve is controlled to throttle according to the throttling method in heating mode; the second electronic expansion valve 22 is determined to be the pilot valve, and the pilot valve is controlled to be fully open. For example... Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner also includes: Step 21, when the air conditioner is in heating mode, the main valve is the electronic expansion valve A, and the pilot valve B is fully open without throttling.

[0043] The solution of the present invention detects the temperature t of the controller module 3. 模块 The temperature difference between the heat exchanger intermediate temperature (i.e., the condenser outlet temperature in the current mode) and the temperature t of controller module 3 will affect the temperature t of the controller module 3. 模块 The temperature t of controller module 3 is determined by comparing the temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference Δt0. 模块 The system checks for abnormalities to enable self-testing of the wiring sequence in the dual-valve controller. Based on the self-test results, if the wiring of valves A and B is found to be incorrect, an alarm prompts the user to reconnect the wires, thus achieving fault self-detection. In this way, the system uses intelligent methods to achieve self-testing of the wiring sequence in the dual-valve controller, eliminating electrical safety hazards caused by abnormal wiring sequences, preventing electrical safety hazards from the source, and improving the reliability of air conditioner components.

[0044] In step S120, when the air conditioner is operating in the current mode, the temperature of the controller module 3 is obtained, and the temperature of the condenser outlet in the outdoor unit heat exchanger and the indoor unit heat exchanger is obtained.

[0045] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. In step S120, when the air conditioner is operating in the current mode, the temperature of the controller module 3 is obtained, and the temperatures of the condenser outlets of the outdoor unit heat exchanger and the indoor unit heat exchanger are obtained, including any of the following acquisition scenarios:

[0046] The first acquisition scenario: When the air conditioner is operating in cooling mode, the temperature of the controller module 3 is acquired; the refrigerant temperature at the outlet of the outdoor unit heat exchanger is acquired as the temperature at the outlet of the condenser. For example... Figure 6 As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner also includes: In step 11, when the air conditioner is in cooling mode, the main valve is electronic expansion valve B, the pilot valve A (i.e., the pilot valve is electronic expansion valve A) is fully open and not throttling, and the first temperature sensing device (such as the external pipe temperature sensing device) 51 detects the refrigerant temperature T of the outdoor unit heat exchanger after condensation in real time. 外管 Temperature t of controller module 3 模块 The module temperature is the temperature after passing through the first temperature sensing device (such as the external tube temperature sensing device 51), the electronic expansion valve A, and the refrigerant heat dissipation pipe 4.

[0047] The second acquisition scenario: When the air conditioner is operating in heating mode, the temperature of the controller module 3 is acquired; the refrigerant temperature at the outlet of the indoor unit heat exchanger is acquired as the temperature at the outlet of the condenser. For example... Figure 6 As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner also includes: In step 21, when the air conditioner is in heating mode, the main valve is the electronic expansion valve A, the pilot valve B is fully open and not throttling, and the second temperature sensing device (such as the indoor pipe temperature sensing device) 52 detects the refrigerant temperature t of the indoor unit heat exchanger after condensation in real time. 内管 Temperature t of controller module 3 模块 The module temperature is the temperature after passing through the second temperature sensing device (such as the inner tube temperature sensing device) 52, the electronic expansion valve B, and the refrigerant heat dissipation pipe 4.

[0048] The solution of the present invention involves obtaining the temperature of the controller module 3, the temperature of the condenser outlet in the outdoor unit heat exchanger and the indoor unit heat exchanger, and detecting the temperature t of the controller module 3 when the air conditioner is operating in the current mode. 模块 The temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the temperature t of controller module 3 will affect the temperature t of the controller module 3. 模块 The temperature t of controller module 3 is determined by comparing the temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference Δt0. 模块 To check for abnormalities, the system performs a self-test of the wiring sequence in the dual-valve controller. This intelligent method enables the self-test of the wiring sequence of the dual-valve controller, eliminating electrical safety hazards caused by abnormal wiring sequences and preventing such hazards from the source, thereby improving the reliability of the air conditioner's components.

[0049] In step S130, when the air conditioner is operating in the current mode, based on the temperature of the controller module 3 and the temperature of the condenser outlet, it is determined whether there is a fault in the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box.

[0050] In some embodiments, the current operating mode of the air conditioner is the cooling mode. The specific process of determining whether there is a wiring sequence error at the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, based on the temperature of the controller module 3 and the condenser outlet temperature when the air conditioner is operating in the current mode, is described in the following exemplary description.

[0051] The following is combined Figure 2 The schematic diagram illustrates an embodiment of the method of the present invention for determining whether there is a fault in the wiring sequence of the connector terminals of the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box in the cooling mode. It further explains the specific process of determining whether there is a fault in the wiring sequence of the connector terminals of the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box in the cooling mode in step S130, including steps S210 to S240.

[0052] Step S210: When the air conditioner is operating in cooling mode, determine the difference between the temperature of the controller module 3 and the temperature of the condenser outlet, and record it as the first difference of the air conditioner, such as Δt = module temperature t. 模块 -t 外管 .

[0053] Step S220: When the air conditioner is operating in cooling mode, determine whether the first difference of the air conditioner is greater than or equal to a preset cooling temperature difference threshold; wherein, the preset cooling temperature difference threshold is a preset temperature difference Δt. 01 .

[0054] Step S230: When the air conditioner is running in cooling mode, if it is determined that the first difference of the air conditioner is greater than or equal to the preset cooling temperature difference threshold, then it is determined that the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board in the electrical box is correct.

[0055] Step S240: When the air conditioner is running in cooling mode, if it is determined that the first difference of the air conditioner is less than the preset cooling temperature difference threshold, then it is determined that the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board in the electrical box is incorrect.

[0056] like Figure 6 As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner, after step 11, also includes: step 12, calculating Δt = temperature t of controller module 3. 模块 -Refrigerant temperature of outdoor unit heat exchanger t 外管 .

[0057] Step 13: If Δt ≥ preset temperature difference Δt 01 If the value is greater than 0, then the wiring of valves A and B is correct, and the self-test passes. If Δt < preset temperature difference Δt is satisfied... 01 If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm (N). The preset temperature difference Δt... 01 The range is such as 10℃~25℃, which is related to the indoor and outdoor ambient temperature and the system operating frequency.

[0058] In the solution of this invention, in cooling mode, the temperature t of the controller module 3 is first detected. 模块 The temperature difference between the heat exchanger intermediate temperature (i.e., the condenser outlet temperature in the current mode) and the calculated temperature t of controller module 3 are then calculated. 模块 The temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference is compared to determine the temperature t of the controller module 3. 模块 The intelligent fault self-diagnosis method for abnormalities solves the electrical safety problems in related solutions, such as condensation on the hot surfaces of components in the electrical box due to abnormal wiring sequence of the dual-valve controller, which can eventually lead to board burnout. It achieves the effect of intelligent error prevention and correction in production and after-sales service, which can improve the reliability of components and extend the service life of air conditioners.

[0059] In some implementations, the current operating mode of the air conditioner is the heating mode of the air conditioner.

[0060] In step S130, when the air conditioner is operating in the current mode, the specific process of determining whether there is a fault in the wiring sequence of the connector terminals of the controller module 3, the first electronic expansion valve 21, and the second electronic expansion valve 22 on the control board inside the electrical box, based on the temperature of the controller module 3 and the temperature of the condenser outlet, is described in the following exemplary description.

[0061] The following is combined with Figure 3The illustrated flowchart shows an embodiment of the method of the present invention for determining whether there is a fault in the wiring sequence of the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box in the heating mode. The flowchart further illustrates the specific process of determining whether there is a fault in the wiring sequence of the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box in the heating mode in step S130, including steps S310 to S340.

[0062] Step S310: When the air conditioner is operating in heating mode, determine the difference between the temperature of the controller module 3 and the temperature of the condenser outlet, and record it as the second difference of the air conditioner, such as Δt = module temperature t 模块 -t 内管 .

[0063] Step S320: When the air conditioner is operating in heating mode, determine whether the second difference of the air conditioner is greater than or equal to a preset heating temperature difference threshold; wherein, the preset heating temperature difference threshold is a preset temperature difference Δt. 02 .

[0064] Step S330: When the air conditioner is operating in heating mode, if it is determined that the first difference of the air conditioner is greater than or equal to the preset heating temperature difference threshold, then it is determined that the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board in the electrical box is correct.

[0065] Step S340: When the air conditioner is operating in heating mode, if it is determined that the first difference of the air conditioner is less than the preset heating temperature difference threshold, then it is determined that the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box is incorrect.

[0066] like Figure 6 As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner, after step 21, also includes: step 22, calculating Δt = temperature t of controller module 3. 模块 -Refrigerant temperature of indoor unit heat exchanger t 内管 .

[0067] Step 23: If Δt ≥ preset temperature difference Δt 02 If the value is greater than 0, then the wiring of valves A and B is correct, and the self-test passes. If the condition is met that Δt < preset temperature difference Δt... 02 If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm (N). The preset temperature difference Δt... 02The temperature range is such as 5℃~20℃, which is related to the indoor ambient temperature, the outdoor ambient temperature, and the system operating frequency.

[0068] In the solution of this invention, in heating mode, the temperature t of the controller module 3 is first detected. 模块 The temperature difference between the heat exchanger intermediate temperature (i.e., the condenser outlet temperature in the current mode) and the calculated temperature t of controller module 3 are then calculated. 模块 The temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference is compared to determine the temperature t of the controller module 3. 模块 The intelligent fault self-diagnosis method for abnormalities solves the electrical safety problems in related solutions, such as condensation on the hot surfaces of components in the electrical box due to abnormal wiring sequence of the dual-valve controller, which can eventually lead to board burnout. It achieves the effect of intelligent error prevention and correction in production and after-sales service, which can improve the reliability of components and extend the service life of air conditioners.

[0069] In step S140, when the air conditioner is operating in the current mode, if it is determined that there is a wiring sequence error at the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, a prompt message is initiated to prompt for reconnection.

[0070] See Figure 5 In the example shown, a first temperature sensing device (such as an external pipe temperature sensing device) 51 is installed after the outdoor unit heat exchanger to detect the refrigerant temperature flowing through the outdoor unit heat exchanger in real time. A second temperature sensing device (such as an internal pipe temperature sensing device) 52 is installed after the indoor unit heat exchanger to detect the refrigerant temperature flowing through the indoor unit heat exchanger in real time. The electrical box contains a control board, and a controller module 3 is embedded in the control board. When the air conditioner is running, the controller module 3 generates heat due to the current flowing through it, and the temperature of the controller module 3 changes with temperature. 模块 The temperature rises. Of the first electronic expansion valve 21 and the second electronic expansion valve 22, one is a pilot valve, and the other is the main valve. When the pilot valve is fully open, the throttling and pressure reduction of the main valve meets the preset target exhaust temperature, achieving rapid cooling or heating. The temperature t of the controller module 3, located after the pilot valve and before the main valve, is detected. 模块 The temperature difference Δt between the intermediate temperature of the corresponding heat exchanger and the intermediate temperature of the corresponding heat exchanger, where the intermediate temperature of the corresponding heat exchanger during cooling is the intermediate temperature t of the outdoor heat exchanger. 外管 During heating, the intermediate temperature t of the heat exchanger on the indoor side is... 内管 The temperature t of controller module 3 模块 The temperature t of controller module 3 is determined by comparing the temperature difference Δt between the intermediate temperature of the corresponding heat exchanger and the preset temperature difference Δt0. 模块The system checks for abnormalities to determine if valves A and B are wired incorrectly. During the air conditioner production stage, self-testing and alarms indicate wiring errors and prompt reconnection. This prevents electrical safety hazards caused by condensation on the hot surfaces of components inside the electrical box due to throttling and cooling of the pilot valve.

[0071] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. In step S140, if the air conditioner is operating in the current mode and a fault is determined to exist in the wiring sequence of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, a prompt message is initiated to prompt for reconnection, including any of the following prompt scenarios:

[0072] The first prompt scenario: When the air conditioner is operating in cooling mode, if it is determined that there is a wiring sequence error at the connection terminals of the controller module 3, the first electronic expansion valve 21, and the second electronic expansion valve 22 on the control board inside the electrical box, a prompt message is issued to prompt for reconnection; and after reconnection, if it is determined that the difference between the temperature of the controller module 3 and the temperature of the condenser outlet is greater than or equal to a preset cooling temperature difference threshold, then it is determined that the wiring sequence of the connection terminals of the controller module 3, the first electronic expansion valve 21, and the second electronic expansion valve 22 on the control board inside the electrical box is correct. Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner further includes: in step 13, if Δt < preset temperature difference Δt 01 If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm (N). The wiring must be reconnected and the self-test repeated until the preset temperature difference Δt is met. 01 If the value is greater than 0, the self-test passes.

[0073] The second prompt scenario: When the air conditioner is operating in heating mode, if it is determined that there is a wiring sequence error at the connection terminals of the controller module 3, the first electronic expansion valve 21, and the second electronic expansion valve 22 on the control board inside the electrical box, a prompt message is issued to prompt for reconnection; and after reconnection, if it is determined that the difference between the temperature of the controller module 3 and the temperature of the condenser outlet is greater than or equal to a preset heating temperature difference threshold, then it is determined that the wiring sequence of the connection terminals of the controller module 3, the first electronic expansion valve 21, and the second electronic expansion valve 22 on the control board inside the electrical box is correct. Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner further includes: in step 23, if the condition is met that Δt < preset temperature difference Δt 02If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm (N). The wiring must be reconnected and the self-test repeated until the preset temperature difference Δt is met. 02 If the value is greater than 0, the self-test passes.

[0074] The solution of this invention involves detecting the temperature t of the controller module 3 of the dual-valve controller. 模块 The temperature difference between the controller module 3 and the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) is compared with the preset temperature difference Δt0 to determine whether the temperature of the controller module 3 is abnormal, thereby determining whether the wiring of valves A and B is incorrect, and realizing self-testing. The solution of this invention is mainly used in the production stage, but it is also applicable in the after-sales stage (the reason for its main use in the production stage is that after error prevention and correction in the production stage, there is no such problem in the after-sales stage). Error prevention and correction are achieved through intelligent fault self-testing. Thus, through self-testing, electrical safety hazards are avoided from the source, and the reliability of components in the electrical box of the air conditioner is improved.

[0075] Using the technical solution of this embodiment, for an air conditioner having a compressor, indoor unit heat exchanger, first electronic expansion valve 21, second electronic expansion valve 22, and electrical box on the indoor side, and an outdoor unit heat exchanger on the outdoor side, the second electronic expansion valve is used as the main valve and the first electronic expansion valve is used as the pilot valve to control the pilot valve to be fully open during the cooling operation of the air conditioner. The temperature t of the controller module 3 is determined based on the difference between the temperature of the controller module in the electrical box and the refrigerant temperature at the outlet of the outdoor unit heat exchanger. 模块 To determine if there is an abnormality, it is necessary to identify whether valves A and B are wired incorrectly. During air conditioner heating operation, the first electronic expansion valve acts as the main valve, and the second electronic expansion valve acts as the pilot valve, controlling it to be fully open. The temperature t of controller module 3 is determined based on the difference between the temperature of the controller module in the electrical box and the refrigerant temperature at the outlet of the indoor unit's heat exchanger. 模块 By checking for abnormalities, it can be determined whether valves A and B are wired incorrectly; thus, by checking whether the temperature of the controller module 3 of the dual-valve controller is abnormal, it can be determined whether the wiring sequence of the dual-valve controller is abnormal, thereby improving the reliability of the components in the electrical box and extending the service life of the air conditioner.

[0076] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method for an air conditioner is also provided. See also Figure 4 The diagram shows a structural schematic of an embodiment of the device of the present invention. The air conditioner has an outdoor unit and an indoor unit. The outdoor unit has an outdoor unit heat exchanger, and the indoor unit has an indoor unit heat exchanger, a first electronic expansion valve 21, a second electronic expansion valve 22, and an electrical box. The electrical box has a control board, and the control board has a controller module 3. The first electronic expansion valve 21, the controller module 3, and the second electronic expansion valve 22 are sequentially disposed between the outdoor unit heat exchanger and the indoor unit heat exchanger. Figure 5 This is a structural diagram of an air conditioner. Figure 5 The air conditioner shown includes an indoor side and an outdoor side. The indoor side of the air conditioner mainly consists of a compressor, a four-way valve 1, an electrical box, an indoor unit heat exchanger, and a throttling device. The outdoor side of the air conditioner mainly consists of an outdoor unit heat exchanger and an axial flow fan system. In the present invention, the throttling device is controlled by dual expansion valves, which include a first electronic expansion valve 21 (e.g., electronic expansion valve A) and a second electronic expansion valve 22 (e.g., electronic expansion valve B). The compressor's exhaust port is connected to the first port of the four-way valve 1. The second port of the four-way valve 1 is connected to the fourth port of the four-way valve 1 after passing through the outdoor unit heat exchanger, the first electronic expansion valve 21, the refrigerant heat dissipation pipe 4, the controller module 3, the second electronic expansion valve 22, and the indoor unit heat exchanger. The third port of the four-way valve 1 is connected to the compressor's suction port after passing through a liquid receiver. In the present invention, as shown... Figure 4 As shown, the control device of the air conditioner includes: an acquisition unit 102 and a control unit 104.

[0077] The control unit 104 is configured to, when the air conditioner is powered on and turned on in the current mode, control the main valve of the first electronic expansion valve 21 and the second electronic expansion valve 22 to throttle and the pilot valve to fully open. The specific functions and processing of the control unit 104 are described in step S110.

[0078] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. When the air conditioner is powered on and turned on in the current mode, the control unit 104 controls the main valve of the first electronic expansion valve 21 and the second electronic expansion valve 22 to throttle and the pilot valve to fully open, including any of the following control scenarios:

[0079] The first control scenario: The control unit 104 is further configured to, after the air conditioner is powered on and turned on in cooling mode, determine the second electronic expansion valve 22 as the main valve and control the main valve to throttle in the throttling mode; determine the first electronic expansion valve 21 as the pilot valve and control the pilot valve to fully open. Figure 6 This is a schematic diagram of the control flow for the self-test method of the dual-valve controller in an air conditioner. (Example:) Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner includes: Step 11, when the air conditioner is running in cooling mode, the main valve is electronic expansion valve B, and the pilot valve A (i.e., the pilot valve is electronic expansion valve A) is fully open and not throttled.

[0080] The second control scenario: The control unit 104 is further configured to, after the air conditioner is powered on and turned on in heating mode, determine that the first electronic expansion valve 21 is the main valve and control the main valve to throttle according to the throttling method in heating mode; determine that the second electronic expansion valve 22 is the pilot valve and control the pilot valve to fully open. For example... Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner also includes: Step 21, when the air conditioner is in heating mode, the main valve is the electronic expansion valve A, and the pilot valve B is fully open without throttling.

[0081] The solution of the present invention detects the temperature t of the controller module 3. 模块 The temperature difference between the heat exchanger intermediate temperature (i.e., the condenser outlet temperature in the current mode) and the temperature t of controller module 3 will affect the temperature t of the controller module 3. 模块 The temperature t of controller module 3 is determined by comparing the temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference Δt0. 模块 The system checks for abnormalities to enable self-testing of the wiring sequence in the dual-valve controller. Based on the self-test results, if the wiring of valves A and B is found to be incorrect, an alarm prompts the user to reconnect the wires, thus achieving fault self-detection. In this way, the system uses intelligent methods to achieve self-testing of the wiring sequence in the dual-valve controller, eliminating electrical safety hazards caused by abnormal wiring sequences, preventing electrical safety hazards from the source, and improving the reliability of air conditioner components.

[0082] The acquisition unit 102 is configured to acquire the temperature of the controller module 3 and the condenser outlet temperatures of the outdoor unit heat exchanger and the indoor unit heat exchanger when the air conditioner is operating in the current mode. For the specific functions and processing of the acquisition unit 102, please refer to step S120.

[0083] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. The acquisition unit 102, when the air conditioner is operating in the current mode, acquires the temperature of the controller module 3, and acquires the temperatures of the condenser outlets of the outdoor unit heat exchanger and the indoor unit heat exchanger, including any of the following acquisition scenarios:

[0084] The first acquisition scenario: The acquisition unit 102 is further configured to acquire the temperature of the controller module 3 when the air conditioner is operating in cooling mode; and to acquire the refrigerant temperature at the outlet of the outdoor unit heat exchanger as the temperature at the outlet of the condenser. Figure 6As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner also includes: In step 11, when the air conditioner is in cooling mode, the main valve is electronic expansion valve B, the pilot valve A (i.e., the pilot valve is electronic expansion valve A) is fully open and not throttling, and the first temperature sensing device (such as the external pipe temperature sensing device) 51 detects the refrigerant temperature T of the outdoor unit heat exchanger after condensation in real time. 外管 Temperature t of controller module 3 模块 The module temperature is the temperature after passing through the first temperature sensing device (such as the external tube temperature sensing device 51), the electronic expansion valve A, and the refrigerant heat dissipation pipe 4.

[0085] The second acquisition scenario: Specifically, the acquisition unit 102 is further configured to acquire the temperature of the controller module 3 when the air conditioner is operating in heating mode; and to acquire the refrigerant temperature at the outlet of the indoor unit heat exchanger as the temperature at the outlet of the condenser. Figure 6 As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner also includes: In step 21, when the air conditioner is in heating mode, the main valve is the electronic expansion valve A, the pilot valve B is fully open and not throttling, and the second temperature sensing device (such as the indoor pipe temperature sensing device) 52 detects the refrigerant temperature t of the indoor unit heat exchanger after condensation in real time. 内管 Temperature t of controller module 3 模块 The module temperature is the temperature after passing through the second temperature sensing device (such as the inner tube temperature sensing device) 52, the electronic expansion valve B, and the refrigerant heat dissipation pipe 4.

[0086] The solution of the present invention involves obtaining the temperature of the controller module 3, the temperature of the condenser outlet in the outdoor unit heat exchanger and the indoor unit heat exchanger, and detecting the temperature t of the controller module 3 when the air conditioner is operating in the current mode. 模块 The temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the temperature t of controller module 3 will affect the temperature t of the controller module 3. 模块 The temperature t of controller module 3 is determined by comparing the temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference Δt0. 模块 To check for abnormalities, the system performs a self-test of the wiring sequence in the dual-valve controller. This intelligent method enables the self-test of the wiring sequence of the dual-valve controller, eliminating electrical safety hazards caused by abnormal wiring sequences and preventing such hazards from the source, thereby improving the reliability of the air conditioner's components.

[0087] The control unit 104 is further configured to, when the air conditioner is operating in the current mode, determine whether there is a wiring sequence error in the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, based on the temperature of the controller module 3 and the temperature of the condenser outlet. The specific functions and processing of this control unit 104 are further described in step S130.

[0088] In some embodiments, the current operating mode of the air conditioner is the cooling mode. When the air conditioner is operating in the current mode, the control unit 104 determines, based on the temperature of the controller module 3 and the condenser outlet temperature, whether there is a wiring sequence error at the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, including:

[0089] The control unit 104 is further configured to, when the air conditioner is operating in cooling mode, determine the difference between the temperature of the controller module 3 and the temperature of the condenser outlet, and record it as the first difference of the air conditioner, such as Δt = module temperature t 模块 -t 外管 For details on the specific functions and processing of the control unit 104, please refer to step S210.

[0090] The control unit 104 is further configured to determine, when the air conditioner is operating in cooling mode, whether a first difference value of the air conditioner is greater than or equal to a preset cooling temperature difference threshold. The specific functions and processing of the control unit 104 are further described in step S220. The preset cooling temperature difference threshold is, for example, a preset temperature difference Δt. 01 .

[0091] The control unit 104 is further configured to, when the air conditioner is operating in cooling mode, determine that the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box is correct if the first difference of the air conditioner is determined to be greater than or equal to a preset cooling temperature difference threshold. The specific functions and processing of this control unit 104 are further described in step S230.

[0092] The control unit 104 is further configured to, when the air conditioner is operating in cooling mode, determine that if the first difference of the air conditioner is less than a preset cooling temperature difference threshold, the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box is incorrect. The specific functions and processing of this control unit 104 are further described in step S240.

[0093] like Figure 6 As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner, after step 11, also includes: step 12, calculating Δt = temperature t of controller module 3. 模块 -Refrigerant temperature of outdoor unit heat exchanger t 外管 .

[0094] Step 13: If Δt ≥ preset temperature difference Δt 01 If the value is greater than 0, then the wiring of valves A and B is correct, and the self-test passes. If Δt < preset temperature difference Δt is satisfied... 01 If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm indicating N.

[0095] In the solution of this invention, in cooling mode, the temperature t of the controller module 3 is first detected. 模块 The temperature difference between the heat exchanger intermediate temperature (i.e., the condenser outlet temperature in the current mode) and the calculated temperature t of controller module 3 are then calculated. 模块 The temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference is compared to determine the temperature t of the controller module 3. 模块 The intelligent fault self-diagnosis method for abnormalities solves the electrical safety problems in related solutions, such as condensation on the hot surfaces of components in the electrical box due to abnormal wiring sequence of the dual-valve controller, which can eventually lead to board burnout. It achieves the effect of intelligent error prevention and correction in production and after-sales service, which can improve the reliability of components and extend the service life of air conditioners.

[0096] In some embodiments, the current operating mode of the air conditioner is its heating mode. When the air conditioner is operating in the current mode, the control unit 104 determines, based on the temperature of the controller module 3 and the condenser outlet temperature, whether there is a wiring sequence error at the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box. This includes:

[0097] The control unit 104 is further configured to, when the air conditioner is operating in heating mode, determine the difference between the temperature of the controller module 3 and the temperature of the condenser outlet, and record it as the second difference of the air conditioner, such as Δt = module temperature t 模块 -t 内管 For details on the specific functions and processing of the control unit 104, please refer to step S310.

[0098] The control unit 104 is further configured to determine, when the air conditioner is operating in heating mode, whether the second difference value of the air conditioner is greater than or equal to a preset heating temperature difference threshold. The specific functions and processing of the control unit 104 are further described in step S320. The preset heating temperature difference threshold is, for example, a preset temperature difference Δt. 02 .

[0099] The control unit 104 is further configured to, when the air conditioner is operating in heating mode, determine that the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box is correct if the first difference of the air conditioner is determined to be greater than or equal to a preset heating temperature difference threshold. The specific functions and processing of this control unit 104 are further described in step S330.

[0100] The control unit 104 is further configured to, when the air conditioner is operating in heating mode, determine that if the first difference of the air conditioner is less than a preset heating temperature difference threshold, the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box is incorrect. The specific functions and processing of this control unit 104 are further described in step S340.

[0101] like Figure 6 As shown, the self-test method for the dual-valve controller wiring sequence of the air conditioner, after step 21, also includes: step 22, calculating Δt = temperature t of controller module 3. 模块 -Refrigerant temperature of indoor unit heat exchanger t 内管 .

[0102] Step 23: If Δt ≥ preset temperature difference Δt 02 If the value is greater than 0, then the wiring of valves A and B is correct, and the self-test passes. If the condition is met that Δt < preset temperature difference Δt... 02 If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm indicating N.

[0103] In the solution of this invention, in heating mode, the temperature t of the controller module 3 is first detected. 模块 The temperature difference between the heat exchanger intermediate temperature (i.e., the condenser outlet temperature in the current mode) and the calculated temperature t of controller module 3 are then calculated. 模块 The temperature difference between the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) and the preset temperature difference is compared to determine the temperature t of the controller module 3. 模块 The intelligent fault self-diagnosis method for abnormalities solves the electrical safety problems in related solutions, such as condensation on the hot surfaces of components in the electrical box due to abnormal wiring sequence of the dual-valve controller, which can eventually lead to board burnout. It achieves the effect of intelligent error prevention and correction in production and after-sales service, which can improve the reliability of components and extend the service life of air conditioners.

[0104] The control unit 104 is further configured to, when the air conditioner is operating in the current mode, if a fault is determined to exist in the wiring sequence of the connector terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, to prompt for reconnection. The specific functions and processing of this control unit 104 are further described in step S140.

[0105] See Figure 5 In the example shown, a first temperature sensing device (such as an external pipe temperature sensing device) 51 is installed after the outdoor unit heat exchanger to detect the refrigerant temperature flowing through the outdoor unit heat exchanger in real time. A second temperature sensing device (such as an internal pipe temperature sensing device) 52 is installed after the indoor unit heat exchanger to detect the refrigerant temperature flowing through the indoor unit heat exchanger in real time. The electrical box contains a control board, and a controller module 3 is embedded in the control board. When the air conditioner is running, the controller module 3 generates heat due to the current flowing through it, and the temperature of the controller module 3 changes with temperature. 模块 The temperature rises. Of the first electronic expansion valve 21 and the second electronic expansion valve 22, one is a pilot valve, and the other is the main valve. When the pilot valve is fully open, the throttling and pressure reduction of the main valve meets the preset target exhaust temperature, achieving rapid cooling or heating. The temperature t of the controller module 3, located after the pilot valve and before the main valve, is detected. 模块 The temperature difference Δt between the intermediate temperature of the corresponding heat exchanger and the intermediate temperature of the corresponding heat exchanger, where the intermediate temperature of the corresponding heat exchanger during cooling is the intermediate temperature t of the outdoor heat exchanger. 外管 During heating, the intermediate temperature t of the heat exchanger on the indoor side is... 内管 The temperature t of controller module 3 模块 The temperature t of controller module 3 is determined by comparing the temperature difference Δt between the intermediate temperature of the corresponding heat exchanger and the preset temperature difference Δt0. 模块 The system checks for abnormalities to determine if valves A and B are wired incorrectly. During the air conditioner production stage, self-testing and alarms indicate wiring errors and prompt reconnection. This prevents electrical safety hazards caused by condensation on the hot surfaces of components inside the electrical box due to throttling and cooling of the pilot valve.

[0106] In some embodiments, the current operating mode of the air conditioner is either the cooling mode or the heating mode. When the air conditioner is operating in the current mode, if the control unit 104 determines that there is a wiring sequence error at the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, it initiates a prompt message to prompt for reconnection, including any of the following prompt scenarios:

[0107] The first prompt scenario: Specifically, the control unit 104 is further configured to, when the air conditioner is operating in cooling mode, if it is determined that there is a wiring sequence error at the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, initiate a prompt message to prompt for reconnection; and after reconnection, if it is determined that the difference between the temperature of the controller module 3 and the temperature of the condenser outlet is greater than or equal to a preset cooling temperature difference threshold, then it is determined that the wiring sequence of the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box is correct. Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner further includes: in step 13, if Δt < preset temperature difference Δt 01 If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm (N). The wiring must be reconnected and the self-test repeated until the preset temperature difference Δt is met. 01 If the value is greater than 0, the self-test passes.

[0108] The second prompt scenario: Specifically, the control unit 104 is further configured to, when the air conditioner is operating in heating mode, if it is determined that there is a wiring sequence error at the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box, initiate a prompt message to prompt for reconnection; and after reconnection, if it is determined that the difference between the temperature of the controller module 3 and the temperature of the condenser outlet is greater than or equal to a preset heating temperature difference threshold, then it is determined that the wiring sequence of the connection terminals of the controller module 3 and the first electronic expansion valve 21 and the second electronic expansion valve 22 on the control board inside the electrical box is correct. Figure 6 As shown, the self-test method for the dual-valve controller of the air conditioner further includes: in step 23, if the condition is met that Δt < preset temperature difference Δt 02 If the wiring of valves A and B is incorrect, the self-test will fail, and the buzzer will sound an alarm (N). The wiring must be reconnected and the self-test repeated until the preset temperature difference Δt is met. 02 If the value is greater than 0, the self-test passes.

[0109] The solution of this invention involves detecting the temperature t of the controller module 3 of the dual-valve controller. 模块The temperature difference between the controller module 3 and the intermediate temperature of the heat exchanger (i.e., the condenser outlet temperature in the current mode) is compared with the preset temperature difference Δt0 to determine whether the temperature of the controller module 3 is abnormal, thereby determining whether the wiring of valves A and B is incorrect, and realizing self-testing. The solution of this invention is mainly used in the production stage, but it is also applicable in the after-sales stage (the reason for its main use in the production stage is that after error prevention and correction in the production stage, there is no such problem in the after-sales stage). Error prevention and correction are achieved through intelligent fault self-testing. Thus, through self-testing, electrical safety hazards are avoided from the source, and the reliability of components in the electrical box of the air conditioner is improved.

[0110] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0111] According to an embodiment of the present invention, an air conditioner corresponding to a control device for an air conditioner is also provided. This air conditioner may include the control device for an air conditioner described above.

[0112] Since the processing and functions implemented by the air conditioner in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned devices, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0113] According to an embodiment of the present invention, a computer program product corresponding to an air conditioner is also provided, comprising a computer program that, when executed by a processor, implements the steps of the control method for the air conditioner described above.

[0114] Since the processing and functions implemented by the product in this embodiment are basically the same as those of the aforementioned air conditioner embodiments, principles and examples, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0115] According to an embodiment of the present invention, a storage medium corresponding to a control method for an air conditioner is also provided, the storage medium including a stored program, wherein, when the program is executed, the device where the storage medium is located executes the steps of the control method for the air conditioner described above.

[0116] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0117] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0118] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner has an outdoor unit and an indoor unit. The outdoor unit has an outdoor heat exchanger, and the indoor unit has an indoor heat exchanger, a first electronic expansion valve (21), a second electronic expansion valve (22), and an electrical box. The electrical box has a control board, and the control board has a controller module (3). The first electronic expansion valve (21), the controller module (3), and the second electronic expansion valve (22) are sequentially arranged between the outdoor heat exchanger and the indoor heat exchanger. The control method of the air conditioner includes: When the air conditioner is powered on and turned on in the current mode, controlling the main valve of the first electronic expansion valve (21) and the second electronic expansion valve (22) to throttle and the pilot valve to be fully open includes: after the air conditioner is powered on and turned on in cooling mode, determining that the second electronic expansion valve (22) is the main valve and controlling the main valve to throttle in the throttling mode; determining that the first electronic expansion valve (21) is the pilot valve and controlling the pilot valve to be fully open; after the air conditioner is powered on and turned on in heating mode, determining that the first electronic expansion valve (21) is the main valve and controlling the main valve to throttle in the throttling mode; determining that the second electronic expansion valve (22) is the pilot valve and controlling the pilot valve to be fully open; the current operating mode of the air conditioner is either the cooling mode or the heating mode of the air conditioner. When the air conditioner is running in the current mode, the temperature of the controller module (3) is obtained, and the temperature of the condenser outlet in the outdoor unit heat exchanger and the indoor unit heat exchanger is obtained; Based on the temperature of the controller module (3) and the temperature of the condenser outlet, determine whether there is a wiring sequence error in the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box; and, If a fault is found in the wiring sequence of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box, a prompt message is sent to prompt for reconnection.

2. The control method for an air conditioner according to claim 1, characterized in that, The current operating mode of the air conditioner is either the cooling mode or the heating mode. When the air conditioner is operating in the current mode, the temperature of the controller module (3) is obtained, and the temperature of the condenser outlet in the outdoor unit heat exchanger and the indoor unit heat exchanger is obtained, including: When the air conditioner is running in cooling mode, the temperature of the controller module (3) is obtained; the refrigerant temperature at the outlet of the outdoor unit heat exchanger is obtained as the temperature at the outlet of the condenser. When the air conditioner is operating in heating mode, the temperature of the controller module (3) is obtained; the refrigerant temperature at the outlet of the indoor unit heat exchanger is obtained as the temperature at the outlet of the condenser.

3. The control method for an air conditioner according to claim 1, characterized in that, The current operating mode of the air conditioner is the cooling mode. Based on the temperature of the controller module (3) and the temperature of the condenser outlet, determine whether there is a wiring sequence error in the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box, including: When the air conditioner is running in cooling mode, the difference between the temperature of the controller module (3) and the temperature of the condenser outlet is determined and recorded as the first difference of the air conditioner. Determine whether the first difference of the air conditioner is greater than or equal to the preset cooling temperature difference threshold; If it is determined that the first difference of the air conditioner is greater than or equal to the preset cooling temperature difference threshold, then it is determined that the wiring sequence of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board in the electrical box is correct; If it is determined that the first difference of the air conditioner is less than the preset cooling temperature difference threshold, then it is determined that the wiring sequence of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box is incorrect.

4. The control method for an air conditioner according to claim 1, characterized in that, The current operating mode of the air conditioner is the heating mode. Based on the temperature of the controller module (3) and the temperature of the condenser outlet, determine whether there is a wiring sequence error in the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box, including: When the air conditioner is operating in heating mode, the difference between the temperature of the controller module (3) and the temperature of the condenser outlet is determined and recorded as the second difference of the air conditioner. Determine whether the second difference of the air conditioner is greater than or equal to the preset heating temperature difference threshold; If it is determined that the first difference of the air conditioner is greater than or equal to the preset heating temperature difference threshold, then it is determined that the wiring sequence of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board in the electrical box is correct; If it is determined that the first difference of the air conditioner is less than the preset heating temperature difference threshold, then it is determined that the wiring sequence of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board in the electrical box is incorrect.

5. The control method for an air conditioner according to any one of claims 1 to 4, characterized in that, The current operating mode of the air conditioner is either the cooling mode or the heating mode. If a fault is determined to exist in the wiring sequence of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box, a prompt message is initiated to prompt for reconnection, including: When the air conditioner is running in cooling mode, if it is determined that there is a wiring sequence error in the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box, a prompt message is initiated to prompt for reconnection; and after reconnection, if it is determined that the difference between the temperature of the controller module (3) and the temperature of the condenser outlet is greater than or equal to the preset cooling temperature difference threshold, then it is determined that the wiring sequence of the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box is correct; When the air conditioner is operating in heating mode, if it is determined that there is a wiring sequence error in the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box, a prompt message is initiated to prompt for reconnection; and after reconnection, if it is determined that the difference between the temperature of the controller module (3) and the temperature of the condenser outlet is greater than or equal to the preset heating temperature difference threshold, then it is determined that the wiring sequence of the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box is correct.

6. A control device for an air conditioner that uses the control method for an air conditioner as described in claim 1 to control the air conditioner, characterized in that, The air conditioner has an outdoor unit and an indoor unit. The outdoor unit has an outdoor heat exchanger, and the indoor unit has an indoor heat exchanger, a first electronic expansion valve (21), a second electronic expansion valve (22), and an electrical box. The electrical box has a control board, and the control board has a controller module (3). The first electronic expansion valve (21), the controller module (3), and the second electronic expansion valve (22) are sequentially arranged between the outdoor heat exchanger and the indoor heat exchanger. The control device of the air conditioner includes: When the air conditioner is powered on and turned on in the current mode, the main valve of the first electronic expansion valve (21) and the second electronic expansion valve (22) is throttled and the pilot valve is fully opened. When the air conditioner is running in the current mode, the temperature of the controller module (3) is obtained, and the temperature of the condenser outlet in the outdoor unit heat exchanger and the indoor unit heat exchanger is obtained; Based on the temperature of the controller module (3) and the temperature of the condenser outlet, determine whether there is a wiring sequence error in the connection terminals of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box; and, If a fault is found in the wiring sequence of the controller module (3) and the first electronic expansion valve (21) and the second electronic expansion valve (22) on the control board inside the electrical box, a prompt message is sent to prompt for reconnection.

7. An air conditioner, characterized in that, include: The control device for an air conditioner as described in claim 6.

8. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the control method of the air conditioner according to any one of claims 1 to 5.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the control method for the air conditioner according to any one of claims 1 to 5.

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