Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention discloses an air conditioner, a control method and device of the air conditioner, a storage medium and a computer program product. The opening degree of a main throttling device is controlled to be a first set main opening degree, the opening degree of an auxiliary throttling device is controlled to be a first set auxiliary opening degree, the opening degree of an indoor throttling device is controlled to be a first set indoor opening degree, a fan is started, a compressor is started, and the frequency is increased to a first set frequency; and then the opening degree of at least one throttling device in the outdoor throttling device and the indoor throttling device is adjusted, and according to the inner pipe temperature sensing bulb detection value of the air conditioner and / or the air suction temperature sensing bulb detection value of the air conditioner before and after the opening degree of the at least one throttling device is adjusted, fault detection on whether the load assembly position of the air conditioner exists or not is achieved. According to the scheme, by adjusting the opening degree of the main throttling device and the auxiliary throttling device in the outdoor unit of the air conditioner and / or the opening degree of the indoor throttling device in the indoor unit of the air conditioner, fault detection is achieved according to the change condition of the temperature sensing bulb detection value of the air conditioner, so that faults are accurately removed, and the heat exchange effect of the air conditioner is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to an air conditioner control method and device, an air conditioner, a storage medium, and a computer program product, in particular to an air conditioner fault detection method and device for a double-suction single-row circulation system, an air conditioner, a storage medium, and a computer program product. BACKGROUND

[0002] For an air conditioner of a double-suction single-row circulation system, since more loads are involved, such as more than two electronic expansion valves and more than two temperature sensing bags, the loads are prone to being assembled in wrong positions during assembly, which is difficult to find and affects the heat exchange effect of the air conditioner and user experience.

[0003] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The present application aims to provide an air conditioner control method and device, an air conditioner, a storage medium, and a computer program product to solve the problem that an air conditioner of a double-suction single-row circulation system involves more loads, which are prone to being assembled in wrong positions during assembly and are difficult to find, affecting the heat exchange effect of the air conditioner and user experience. The opening degree of at least one of the main and auxiliary throttling devices in the outdoor unit and the indoor throttling device in the indoor unit of the air conditioner is adjusted, and the change in the temperature sensing bag detection value of the air conditioner is determined to quickly and accurately determine whether the air conditioner has a load assembly fault in the wrong position, so as to accurately eliminate the fault and ensure the heat exchange effect of the air conditioner and improve user experience.

[0005] The application provides a control method of an air conditioner, wherein an outdoor unit of the air conditioner has a compressor, and an outdoor throttling device with a main throttling device and a secondary throttling device; the compressor has a first suction port and a second suction port, a first suction temperature-sensing bulb is arranged at the first suction port, and a second suction temperature-sensing bulb is arranged at the second suction port; an indoor unit of the air conditioner has a first indoor heat exchanger, a second indoor heat exchanger, and an indoor throttling device arranged on a pipeline of the second indoor heat exchanger; a first indoor pipe temperature-sensing bulb is arranged at the first indoor heat exchanger, and a second indoor pipe temperature-sensing bulb is arranged at the second indoor heat exchanger; the control method of the air conditioner comprises the following steps: when the air conditioner enters a detection mode of the air conditioner, the opening degree of the main throttling device is controlled to be a first set main opening degree, the opening degree of the secondary throttling device is controlled to be a first set secondary opening degree, and the opening degree of the indoor throttling device is controlled to be a first set indoor opening degree; a fan of the air conditioner is controlled to be turned on, and the compressor is controlled to be turned on and to be frequency-raised to a first set frequency; wherein the detection mode of the air conditioner is a mode for realizing at least one of the following fault detections of the air conditioner: a first fault, i.e., whether the assembly positions of the main throttling device and the secondary throttling device are abnormal, a second fault, i.e., whether the assembly positions of the first indoor pipe temperature-sensing bulb and the second indoor pipe temperature-sensing bulb are abnormal, and a third fault, i.e., whether the assembly positions of the first suction temperature-sensing bulb and the second suction temperature-sensing bulb are abnormal; a detection value of the first indoor pipe temperature-sensing bulb and a detection value of the second indoor pipe temperature-sensing bulb are obtained, and are recorded as indoor pipe temperature-sensing bulb detection values of the air conditioner; a detection value of the first suction temperature-sensing bulb and a detection value of the second suction temperature-sensing bulb are obtained, and are recorded as suction temperature-sensing bulb detection values of the air conditioner; after a set running time, the opening degree of at least one of the outdoor throttling device and the indoor throttling device is adjusted; according to the indoor pipe temperature-sensing bulb detection values of the air conditioner and / or the suction temperature-sensing bulb detection values of the air conditioner before and after the opening degree of the at least one throttling device is adjusted, detection of at least one of the first fault, the second fault and the third fault is realized; preferably, the control method of the air conditioner further comprises: if the at least one fault is detected, a prompt message that the air conditioner has the at least one fault is initiated.

[0006] In some embodiments, adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device comprises: adjusting the opening degree of the main throttling device, including: adjusting the opening degree of the main throttling device from the first set main opening degree to a second set main opening degree; after a first set interval time, restoring the opening degree of the main throttling device, and adjusting the opening degree of the secondary throttling device, including: adjusting the opening degree of the main throttling device from the second set main opening degree to the first set main opening degree, and adjusting the opening degree of the secondary throttling device from the first set secondary opening degree to a second set secondary opening degree.

[0007] In some embodiments, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, the opening degree of the outdoor throttling device is adjusted, including: adjusting the opening degree of the main throttling device, and adjusting the opening degree of the auxiliary throttling device; and according to the indoor pipe temperature sensing bulb detection value of the air conditioner and / or the suction temperature sensing bulb detection value of the air conditioner before and after adjusting the opening degree of the at least one throttling device, the detection of at least one of the first fault, the second fault and the third fault is realized, including: in the case of adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device, the detection value of the first indoor pipe temperature sensing bulb before adjusting the opening degree of the main throttling device is recorded as the first temperature of the first indoor pipe, the detection value of the first indoor pipe temperature sensing bulb after adjusting the opening degree of the main throttling device is recorded as the second temperature of the first indoor pipe, and the detection value of the first indoor pipe temperature sensing bulb after adjusting the opening degree of the auxiliary throttling device is recorded as the third temperature of the first indoor pipe; it is determined whether the second temperature of the first indoor pipe and the first temperature of the first indoor pipe satisfy the condition that the difference between the second temperature of the first indoor pipe and the first temperature of the first indoor pipe is greater than 0, and the difference between the second temperature of the first indoor pipe and the first temperature of the first indoor pipe is greater than the difference between the third temperature of the first indoor pipe and the first temperature of the first indoor pipe; if it is determined that the condition is satisfied, it is determined that the assembly position of the main throttling device and the auxiliary throttling device is normal; if it is determined that the condition is not satisfied, it is determined that the assembly position of the main throttling device and the auxiliary throttling device is abnormal.

[0008] In some embodiments, adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device further includes: in the case of adjusting the opening degree of the auxiliary throttling device, after the second set interval time, the opening degree of the auxiliary throttling device is restored, and the opening degree of the indoor throttling device is adjusted, including: adjusting the opening degree of the auxiliary throttling device from the second set auxiliary opening degree to the first set auxiliary opening degree, and adjusting the opening degree of the indoor throttling device from the first set indoor opening degree to the second set indoor opening degree.

[0009] In some embodiments, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, the opening degree of the outdoor throttling device is adjusted, including: adjusting the opening degree of the main throttling device, and adjusting the opening degree of the auxiliary throttling device; according to the indoor pipe temperature sensing bulb detection value of the air conditioner and / or the suction temperature sensing bulb detection value of the air conditioner before and after adjusting the opening degree of the at least one throttling device, the detection of at least one of the first fault, the second fault and the third fault is realized, and further including: in the case of adjusting the opening degree of the main throttling device, adjusting the opening degree of the auxiliary throttling device, and adjusting the indoor throttling device, the detection value of the first indoor pipe temperature sensing bulb before adjusting the opening degree of the main throttling device is recorded as the first temperature of the first indoor pipe, the detection value of the first indoor pipe temperature sensing bulb after adjusting the opening degree of the main throttling device is recorded as the second temperature of the first indoor pipe, and the detection value of the first indoor pipe temperature sensing bulb after adjusting the opening degree of the auxiliary throttling device is recorded as the third temperature of the first indoor pipe; the detection value of the first indoor pipe temperature sensing bulb after adjusting the opening degree of the indoor throttling device is recorded as the fourth temperature of the first indoor pipe; and in the case of adjusting the opening degree of the main throttling device and adjusting the indoor throttling device, the detection value of the second indoor pipe temperature sensing bulb before adjusting the opening degree of the main throttling device is recorded as the first temperature of the second indoor pipe, and the detection value of the second indoor pipe temperature sensing bulb after adjusting the opening degree of the indoor throttling device is recorded as the fourth temperature of the second indoor pipe; in the case where the difference between the second temperature of the first indoor pipe and the first temperature of the first indoor pipe is greater than 0, and the difference between the second temperature of the first indoor pipe and the first temperature of the first indoor pipe is greater than the difference between the third temperature of the first indoor pipe and the first temperature of the first indoor pipe, it is determined whether the difference between the first temperature of the first indoor pipe and the fourth temperature of the first indoor pipe is greater than 0, and the difference between the first temperature of the second indoor pipe and the fourth temperature of the second indoor pipe is less than 0; if it is determined that it is satisfied, it is determined that the assembly position of the first indoor pipe temperature sensing bulb and the second indoor pipe temperature sensing bulb is not abnormal; if it is determined that it is not satisfied, it is determined that the assembly position of the first indoor pipe temperature sensing bulb and the second indoor pipe temperature sensing bulb is abnormal.

[0010] In some embodiments, adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device includes: adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device; based on the detection values ​​of the indoor pipe temperature sensor and / or the intake temperature sensor of the air conditioner before and after adjusting the opening degree of the at least one throttling device, detecting at least one of the first fault, the second fault, and the third fault, further includes: when adjusting the opening degree of the main throttling device, adjusting the opening degree of the auxiliary throttling device, and adjusting the indoor throttling device, adjusting the opening degree of the first indoor pipe temperature sensor before adjusting the opening degree of the main throttling device. The temperature reading of the first inner tube is recorded as the first temperature of the first inner tube. The temperature reading of the first inner tube after adjusting the opening of the main throttling device is recorded as the second temperature of the first inner tube. The temperature reading of the first inner tube after adjusting the opening of the auxiliary throttling device is recorded as the third temperature of the first inner tube. The temperature reading of the first inner tube after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the first inner tube. Furthermore, when adjusting both the opening of the main throttling device and the indoor throttling device, the temperature reading of the second inner tube before adjusting the opening of the main throttling device is recorded as the first temperature of the second inner tube, and the temperature reading of the second inner tube after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the first inner tube. The fourth temperature of the second inner tube is recorded as the fourth temperature of the second inner tube; and, when adjusting the indoor throttling device, the detection value of the first inhalation temperature sensor before adjusting the indoor throttling device is recorded as the first temperature of the first inhalation port, and the detection value of the first inhalation temperature sensor after adjusting the indoor throttling device is recorded as the second temperature of the first inhalation port; the detection value of the second inhalation temperature sensor before adjusting the indoor throttling device is recorded as the first temperature of the second inhalation port, and the detection value of the second inhalation temperature sensor after adjusting the indoor throttling device is recorded as the second temperature of the second inhalation port; when it is determined that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is... If the value is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, and it is determined that the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0, then it is determined whether the difference between the second temperature of the first air intake and the first temperature of the first air intake is less than 0, and the difference between the second temperature of the second air intake and the first temperature of the second air intake is greater than 0; if it is determined that the conditions are met, then it is determined that the assembly positions of the first air intake temperature sensor and the second air intake temperature sensor are not abnormal; if it is determined that the conditions are not met, then it is determined that the assembly positions of the first air intake temperature sensor and the second air intake temperature sensor are abnormal.

[0011] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioner. The outdoor unit of the air conditioner has a compressor and an outdoor throttling device having a main throttling device and a secondary throttling device. The compressor has a first intake port and a second intake port. A first intake temperature sensor is provided at the first intake port, and a second intake temperature sensor is provided at the second intake port. The indoor unit of the air conditioner has a first indoor heat exchanger, a second indoor heat exchanger, and an indoor throttling device disposed on the pipeline where the second indoor heat exchanger is located. A first inner pipe temperature sensor is disposed at the first indoor heat exchanger, and a second indoor heat exchanger... A second inner tube temperature sensor is installed at the device; the control device of the air conditioner includes: a control unit configured to, when the air conditioner enters the detection mode, control the opening degree of the main throttling device to a first set main opening degree, the opening degree of the auxiliary throttling device to a first set auxiliary opening degree, and the opening degree of the indoor throttling device to a first set indoor opening degree, control the air conditioner fan to start, and control the compressor to start and increase its frequency to a first set frequency; wherein, the detection mode of the air conditioner is a mode for realizing at least one of the following fault detection modes of the air conditioner: the first fault is the fault of the main throttling device and the auxiliary throttling device. The fault is classified into three types: a fault related to whether the assembly position of the flow device is abnormal; a second fault related to whether the assembly position of the first inner tube temperature sensor and the second inner tube temperature sensor is abnormal; and a third fault related to whether the assembly position of the first intake temperature sensor and the second intake temperature sensor is abnormal. The unit is configured to acquire the detection values ​​of the first inner tube temperature sensor and the second inner tube temperature sensor, and record them as the inner tube temperature sensor detection values ​​of the air conditioner; and to acquire the detection values ​​of the first intake temperature sensor and the second intake temperature sensor, and record them as the intake temperature sensor detection values ​​of the air conditioner. The control unit is further configured to... After setting the operating time, the control unit adjusts the opening degree of at least one of the outdoor throttling device and the indoor throttling device; the control unit is further configured to detect at least one of the first fault, the second fault, and the third fault based on the detection value of the indoor pipe temperature sensor and / or the detection value of the air intake temperature sensor of the air conditioner before and after adjusting the opening degree of the at least one throttling device; preferably, the control device of the air conditioner further includes: the control unit is further configured to initiate a reminder message that the air conditioner has at least one fault if the at least one fault is detected.

[0012] In some embodiments, the control unit adjusts the opening degree of at least one of the outdoor throttling device and the indoor throttling device, including: adjusting the opening degree of the main throttling device by reducing the opening degree of the main throttling device from a first preset main opening degree to a second preset main opening degree; after a first preset interval time, restoring the opening degree of the main throttling device, and adjusting the opening degree of the secondary throttling device by restoring the opening degree of the main throttling device from the second preset main opening degree to the first preset main opening degree, and adjusting the opening degree of the secondary throttling device by reducing the opening degree of the secondary throttling device from the first preset secondary opening degree to the second preset secondary opening degree.

[0013] In some embodiments, the control unit, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, adjusts the opening degree of the outdoor throttling device, including: adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device; the control unit, based on the detection values ​​of the air conditioner's indoor pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault, including: when adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device, the detection value of the first indoor pipe temperature sensor before adjusting the opening degree of the main throttling device. The first temperature of the first inner tube is recorded as the first temperature. The detection value of the first inner tube temperature sensor after adjusting the opening of the main throttling device is recorded as the second temperature of the first inner tube. The detection value of the first inner tube temperature sensor after adjusting the opening of the auxiliary throttling device is recorded as the third temperature of the first inner tube. It is determined whether the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube. If it is determined that the conditions are met, it is determined that the assembly positions of the main throttling device and the auxiliary throttling device are not abnormal. If it is determined that the conditions are not met, it is determined that the assembly positions of the main throttling device and the auxiliary throttling device are abnormal.

[0014] In some embodiments, the control unit, which adjusts the opening degree of at least one of the outdoor throttling device and the indoor throttling device, further includes: when adjusting the opening degree of the secondary throttling device, after a second predetermined interval, restoring the opening degree of the secondary throttling device and adjusting the opening degree of the indoor throttling device, including: adjusting the opening degree of the secondary throttling device from a second predetermined secondary opening degree back to a first predetermined secondary opening degree, and adjusting the opening degree of the indoor throttling device from a first predetermined indoor opening degree to a second predetermined indoor opening degree.

[0015] In some embodiments, the control unit, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, adjusts the opening degree of the outdoor throttling device, including: adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device; the control unit, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's suction temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault, further includes: when adjusting the opening degree of the main throttling device, adjusting the opening degree of the auxiliary throttling device, and adjusting the indoor throttling device, recording the detection value of the first inner pipe temperature sensor before adjusting the opening degree of the main throttling device as the first temperature of the first inner pipe, recording the detection value of the first inner pipe temperature sensor after adjusting the opening degree of the main throttling device as the second temperature of the first inner pipe, and recording the detection value of the first inner pipe temperature sensor after adjusting the opening degree of the auxiliary throttling device as the third temperature of the first inner pipe; and recording the detection value of the first inner pipe temperature sensor after adjusting the opening degree of the indoor throttling device... The detection value of the first inner tube temperature sensor is recorded as the fourth temperature of the first inner tube; and, when adjusting the opening of the main throttling device and the indoor throttling device, the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the second inner tube, and the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube; if it is determined that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, it is determined whether the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0; if it is determined that the condition is met, it is determined that the assembly position of the first inner tube temperature sensor and the second inner tube temperature sensor is not abnormal; if it is determined that the condition is not met, it is determined that the assembly position of the first inner tube temperature sensor and the second inner tube temperature sensor is abnormal.

[0016] In some embodiments, the control unit, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, adjusts the opening degree of the outdoor throttling device, including: adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device; the control unit, based on the detection values ​​of the indoor pipe temperature sensor and / or the intake temperature sensor of the air conditioner before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault, further includes: when adjusting the opening degree of the main throttling device, adjusting the opening degree of the auxiliary throttling device, and adjusting the indoor throttling device, adjusting the main throttling device. The temperature reading of the first inner tube sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the first inner tube; the temperature reading of the first inner tube sensor after adjusting the opening of the main throttling device is recorded as the second temperature of the first inner tube; the temperature reading of the first inner tube sensor after adjusting the opening of the auxiliary throttling device is recorded as the third temperature of the first inner tube; the temperature reading of the first inner tube sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the first inner tube; and, when adjusting the opening of the main throttling device and adjusting the indoor throttling device, the temperature reading of the second inner tube sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the second inner tube; the temperature reading of the second inner tube sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the first inner tube. The detection value of the temperature sensor is recorded as the fourth temperature of the second inner tube; and, when adjusting the indoor throttling device, the detection value of the first inhalation temperature sensor before adjusting the indoor throttling device is recorded as the first temperature of the first inhalation port, and the detection value of the first inhalation temperature sensor after adjusting the indoor throttling device is recorded as the second temperature of the first inhalation port; the detection value of the second inhalation temperature sensor before adjusting the indoor throttling device is recorded as the first temperature of the second inhalation port, and the detection value of the second inhalation temperature sensor after adjusting the indoor throttling device is recorded as the second temperature of the second inhalation port; when it is determined that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the second temperature of the first inner tube and the first temperature of the first inner tube are... If the temperature difference is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, and if the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0, then determine whether the conditions are met: the difference between the second temperature of the first air intake port and the first temperature of the first air intake port is less than 0, and the difference between the second temperature of the second air intake port and the first temperature of the second air intake port is greater than 0. If these conditions are met, then the assembly positions of the first and second air intake temperature sensors are determined to be normal. If these conditions are not met, then the assembly positions of the first and second air intake temperature sensors are determined to be abnormal.

[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 air conditioner control method 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 air conditioner control method described above.

[0020] Therefore, the solution of the present invention is for outdoor units with dual-suction single-row compressors and outdoor heat exchangers (such as...). Figure 7 The condenser shown), main throttling device (such as) Figure 7 The electronic expansion valve A and the auxiliary throttling device (as shown) are shown. Figure 7 The electronic expansion valve B shown), and the indoor unit having a first indoor heat exchanger (such as...) Figure 7 The high-temperature evaporator shown), and the second indoor heat exchanger (such as...) Figure 7 The low-temperature evaporator shown) and the indoor throttling device (such as) installed on the pipeline where the second indoor heat exchanger is located Figure 7 The air conditioner with the electronic expansion valve C shown has a first suction temperature sensor (such as...) installed at the first suction port of the compressor. Figure 7 As shown, a high-temperature suction sensor 32 is installed at the high-temperature suction port of the compressor, and a second suction sensor (such as...) is installed at the second suction port of the compressor. Figure 7The diagram shows a low-temperature suction sensor 31 installed at the low-temperature suction port of the compressor, a first inner tube sensor (e.g., a high-temperature evaporator sensor 51 installed at the high-temperature evaporator), and a second inner tube sensor (e.g., a low-temperature evaporator sensor 52 installed at the low-temperature evaporator) installed at the second indoor heat exchanger. In the air conditioning operation detection mode (i.e., a mode that performs at least one of the following detections: detecting whether the assembly positions of the main throttling device and the auxiliary throttling device are abnormal, detecting whether the assembly positions of the first inner tube sensor and the second inner tube sensor are abnormal, and detecting whether the assembly positions of the first suction sensor and the second suction sensor are abnormal), the opening degree of at least one of the main throttling device, the auxiliary throttling device, and the indoor throttling device is adjusted according to the adjustment of the corresponding throttling device. By measuring the detection values ​​of the first and second inner tube temperature sensors before and after installation, and / or the detection values ​​of the first and second intake temperature sensors, the system detects whether at least one of the following assembly positions is abnormal: the main throttling device and the auxiliary throttling device; the first and second inner tube temperature sensors; or the first and second intake temperature sensors. This allows the system to determine if the air conditioning load is incorrectly installed. Furthermore, by adjusting the opening of at least one of the main and auxiliary throttling devices in the outdoor unit and the indoor throttling device in the indoor unit, and based on changes in the temperature sensor detection values, the system can quickly and accurately determine if the air conditioning has a fault due to incorrect load installation. This allows for precise troubleshooting, ensuring efficient heat exchange and improving the user experience.

[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 air conditioner control method of the present invention; Figure 2 This is a schematic flowchart of an embodiment of the method of the present invention for adjusting the opening degree of the outdoor throttling device; Figure 3 This is a flowchart illustrating an embodiment of the process for detecting the first type of fault in the method of the present invention; Figure 4 This is a flowchart illustrating an embodiment of the process for detecting the second type of fault in the method of the present invention; Figure 5 This is a schematic flowchart illustrating an embodiment of the process for detecting the third type of fault in the method of the present invention. Figure 6 This is a schematic diagram of the structure of an embodiment of the air conditioner control device of the present invention; Figure 7 This is a schematic diagram of a dual-suction, single-row, single-cooling air conditioner. Figure 8 A flowchart illustrating the control function of an air conditioner fault detection device; Figure 9 This is a flowchart illustrating the control logic of an air conditioner fault detection device.

[0024] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows: 11-First electronic expansion valve (i.e., electronic expansion valve A); 12-Second electronic expansion valve (i.e., electronic expansion valve B); 13-Third electronic expansion valve (i.e., electronic expansion valve C); 21-First valve (i.e., valve A); 22-Second valve (i.e., valve B); 23-Third valve (i.e., valve C); 31-Low-temperature intake sensor; 32-High-temperature intake sensor; 33-Exhaust sensor; 41-Outdoor ambient temperature sensor; 42-Condenser temperature sensor; 51-High-temperature evaporator temperature sensor; 52-Low-temperature evaporator temperature sensor; 102-Acquisition unit; 104-Control unit. Detailed Implementation

[0025] 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.

[0026] Considering that air conditioners with a dual-suction, single-row circulation system involve a large load, misalignment of loads during assembly is prone to occur and is difficult to detect, affecting the heat exchange efficiency and user experience. For example, to improve cooling efficiency, an air conditioner with a dual-suction, single-row circulation system was developed. The outdoor unit uses a compressor with two suction ports and one discharge port. The outdoor unit uses two electronic expansion valves (e.g., electronic expansion valve A and electronic expansion valve B), two suction temperature sensors (e.g., low-temperature suction temperature sensor 31 and high-temperature suction temperature sensor 32), one discharge temperature sensor 33, and an outdoor ambient temperature sensor 41. The indoor unit uses one electronic expansion valve (e.g., electronic expansion valve C) and two evaporator temperature sensors (e.g., high-temperature evaporator temperature sensor 5). The outdoor unit of this type of air conditioner has a complex structure, a large load, and similar materials (such as electronic expansion valves and temperature sensors of the same type) that are not easily distinguishable. If two electronic expansion valves, two suction temperature sensors (such as low-temperature suction temperature sensor 31 and high-temperature suction temperature sensor 32), or two evaporator temperature sensors (such as high-temperature evaporator temperature sensor 51 and low-temperature evaporator temperature sensor 52) are installed in the wrong position, it will be difficult to detect, resulting in poor user performance and complaints. Because air conditioning control is a feedback regulation, the air conditioning operation status is adjusted according to the value of the temperature sensors. If the load position is incorrect, such as two electronic expansion valves, two suction temperature sensors (such as low-temperature suction temperature sensor 31 and high-temperature suction temperature sensor 32), or two evaporator temperature sensors (such as high-temperature evaporator temperature sensor 51 and low-temperature evaporator temperature sensor 52), the air conditioning control system will be chaotic, unable to achieve the best operating state of the air conditioner, and may even result in poor cooling and heating effects.

[0027] Alternatively, during user operation, if repairs are needed, after-sales engineers may easily confuse the assembly positions of the two electronic expansion valves, the two suction temperature sensors (such as low-temperature suction temperature sensor 31 and high-temperature suction temperature sensor 32), or the two evaporator temperature sensors (such as high-temperature evaporator temperature sensor 51 and low-temperature evaporator temperature sensor 52), which may also cause poor cooling or heating performance. However, it is very difficult for after-sales engineers to troubleshoot and pinpoint the specific problem.

[0028] Figure 7 This is a schematic diagram of a dual-suction, single-row, single-cooling air conditioner. The present invention addresses a dual-suction, single-row air conditioning circulation system, see... Figure 7 The diagram shows a dual-suction, single-row air conditioner. Figure 7The air conditioner shown includes an outdoor unit and an indoor unit. The outdoor unit includes: a compressor (i.e., a dual-suction single-row compressor with a high-temperature suction port, a low-temperature suction port, and a discharge port), a condenser, a first electronic expansion valve 11 (i.e., electronic expansion valve A), a second electronic expansion valve 12 (i.e., electronic expansion valve B), an evaporator, a first valve 21 (i.e., valve A), a second valve 22 (i.e., valve B), and a third valve 23 (i.e., valve C); the indoor unit includes: a high-temperature evaporator, a low-temperature evaporator, and a third electronic expansion valve 13 (i.e., electronic expansion valve C). The compressor's exhaust port, after passing sequentially through the condenser, the first electronic expansion valve 11 (i.e., electronic expansion valve A), the first port of the flash evaporator, the second port of the flash evaporator, the second electronic expansion valve 12 (i.e., electronic expansion valve B), and the first valve 21 (i.e., valve A), splits into two paths (i.e., the first path and the second path): the first path passes through the high-temperature evaporator and the second valve 22 (i.e., valve B) before returning to the compressor's high-temperature suction port; the second path passes through the third electronic expansion valve 13 (i.e., electronic expansion valve C), the low-temperature evaporator, and the third valve 23 (i.e., valve C) before returning to the compressor's low-temperature suction port. A low-temperature suction temperature sensor 31 is installed at the compressor's low-temperature suction port; a high-temperature suction temperature sensor 32 is installed at the compressor's high-temperature suction port; an exhaust temperature sensor 33 is installed at the compressor's exhaust port; an outdoor ambient temperature sensor 41 and a condenser temperature sensor 42 are installed at the condenser; a high-temperature evaporator temperature sensor 51 is installed at the high-temperature evaporator; and a low-temperature evaporator temperature sensor 52 is installed at the low-temperature evaporator. The third port of the flash generator is connected to the compressor's gas supply port. The first valve 21 (i.e., valve A), the second valve 22 (i.e., valve B), and the third valve 23 (i.e., valve C) are used to connect the corresponding pipelines in the outdoor unit and the indoor unit.

[0029] exist Figure 7 In the dual-suction single-row air conditioning circulation system shown, the outdoor unit uses a dual-suction single-row compressor with two suction ports and one discharge port. The outdoor unit uses two electronic expansion valves (such as electronic expansion valve A and electronic expansion valve B), two suction temperature sensors (such as low-temperature suction temperature sensor 31 and high-temperature suction temperature sensor 32), one discharge temperature sensor 33, and an outdoor ambient temperature sensor 41. The indoor unit uses one electronic expansion valve (such as electronic expansion valve C), two evaporator temperature sensors (such as high-temperature evaporator temperature sensor 51 and low-temperature evaporator temperature sensor 52), and one outdoor ambient temperature sensor 41. The two electronic expansion valves (such as electronic expansion valve A and electronic expansion valve B), the two suction temperature sensors (such as low-temperature suction temperature sensor 31 and high-temperature suction temperature sensor 32) used in the outdoor unit, and the two evaporator temperature sensors (such as high-temperature evaporator temperature sensor 51 and low-temperature evaporator temperature sensor 52) used in the indoor unit have similar functions and are installed in close proximity, which can easily lead to mixed installations.

[0030] Therefore, the present invention proposes an air conditioning control method, specifically a fault detection method for a dual-suction single-row circulation system without adding additional devices. This method involves adjusting the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B), and adjusting the temperature difference before and after electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 to determine if the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly. Similarly, the method involves adjusting the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) and the third electronic expansion valve 13 (i.e., electronic expansion valve C), and adjusting the temperature difference before and after electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 to determine if the high-temperature evaporator temperature sensor 51, the low-temperature evaporator temperature sensor 52, the high-temperature suction temperature sensor 32, and the low-temperature suction temperature sensor 31 are installed incorrectly. This method enables rapid fault detection in air conditioning systems, facilitates quick troubleshooting, ensures efficient heat exchange, and improves user experience.

[0031] According to embodiments of the present invention, an air conditioning control method is provided, such as... Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The outdoor unit of the air conditioner has a compressor and an outdoor throttling device having a main throttling device and a secondary throttling device. The compressor has a first intake port and a second intake port. A first intake temperature sensor is provided at the first intake port, and a second intake temperature sensor is provided at the second intake port. The indoor unit of the air conditioner has a first indoor heat exchanger, a second indoor heat exchanger, and an indoor throttling device disposed on the pipeline where the second indoor heat exchanger is located. A first inner tube temperature sensor is provided at the first indoor heat exchanger, and a second inner tube temperature sensor is provided at the second indoor heat exchanger. The main throttling device is as follows: Figure 7 The electronic expansion valve A shown, the auxiliary throttling device as follows Figure 7 The electronic expansion valve B shown is located at the first suction port of the compressor. Figure 7 The compressor's high-temperature suction port is shown, and the compressor's second suction port is as follows: Figure 7 The compressor's low-temperature suction port is shown, and the first suction temperature sensing bulb is as follows: Figure 7 The high-temperature inhalation temperature sensor 32 shown, the second inhalation temperature sensor as shown Figure 7 The low-temperature suction sensing bulb 31 shown, the first indoor heat exchanger as... Figure 7 The high-temperature evaporator shown, the second indoor heat exchanger as... Figure 7 The low-temperature evaporator shown has an indoor throttling device as described. Figure 7 The electronic expansion valve C shown has a first inner tube temperature sensing bulb as... Figure 7 The high-temperature evaporator temperature sensing bulb 51 shown, and the second inner tube temperature sensing bulb as shown... Figure 1The low-temperature evaporator sensing bulb 52 is shown. In the embodiment of the present invention, as... Figure 2 As shown, the air conditioner control method includes steps S110 to S140, and preferably further includes step S150.

[0032] In step S110, when the air conditioner enters its detection mode, the opening degree of the main throttling device is controlled to a first set main opening degree, the opening degree of the auxiliary throttling device is controlled to a first set auxiliary opening degree, and the opening degree of the indoor throttling device is controlled to a first set indoor opening degree. The air conditioner's fan is then turned on, and the compressor is turned on and its frequency is increased to a first set frequency. The detection mode of the air conditioner is a mode used to detect at least one of the following faults: a first fault is a fault indicating whether the assembly positions of the main throttling device and the auxiliary throttling device are abnormal; a second fault is a fault indicating whether the assembly positions of the first inner tube temperature sensor and the second inner tube temperature sensor are abnormal; and a third fault is a fault indicating whether the assembly positions of the first suction temperature sensor and the second suction temperature sensor are abnormal. The first set main opening degree is, for example, opening degree X1A; the first set auxiliary opening degree is, for example, opening degree X1B; the first set indoor opening degree is, for example, opening degree X1C; and the first set frequency is, for example, frequency f1Hz.

[0033] In step S120, when the air conditioner enters the detection mode, the detection values ​​of the first inner tube temperature sensor and the second inner tube temperature sensor are acquired and recorded as the inner tube temperature sensor detection values ​​of the air conditioner; and the detection values ​​of the first intake temperature sensor and the second intake temperature sensor are acquired and recorded as the intake temperature sensor detection values ​​of the air conditioner; wherein, the detection value of the first inner tube temperature sensor is such as the high temperature evaporation temperature sensor TZH, the detection value of the second inner tube temperature sensor is such as the low temperature evaporation temperature sensor TZL, the detection value of the first intake temperature sensor is such as the high temperature intake temperature sensor TXH, and the detection value of the second intake temperature sensor is such as the low temperature intake temperature sensor TXL.

[0034] In step S130, when the air conditioner enters the detection mode, after setting the running time, that is, after controlling the opening degree of the main throttling device to the first set main opening degree, the opening degree of the auxiliary throttling device to the first set auxiliary opening degree, and the opening degree of the indoor throttling device to the first set indoor opening degree, controlling the air conditioner fan to start, controlling the compressor to start and increase the frequency to the first set frequency, and then controlling the air conditioner to run for the set running time, the opening degree of at least one of the outdoor throttling device and the indoor throttling device is adjusted.

[0035] In step S140, based on the detection values ​​of the inner pipe temperature sensor and / or the air intake temperature sensor of the air conditioner before and after adjusting the opening of the at least one throttling device, at least one of the first fault, the second fault, and the third fault is detected, so as to quickly and accurately determine whether the air conditioner has a fault of incorrect load assembly, which facilitates accurate fault elimination, ensures the heat exchange effect of the air conditioner, and improves the user experience.

[0036] In step S150, if the at least one fault is detected, a reminder message is sent indicating that the air conditioner has at least one fault, so that maintenance personnel can accurately locate and eliminate the fault based on the detected at least one fault, ensuring the heat exchange effect of the air conditioner and improving the user experience.

[0037] This invention proposes a fault detection scheme for air conditioning systems with dual-suction and single-row circulation. The scheme involves adjusting the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B), and adjusting the temperature difference before and after electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 to determine if the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly. Similarly, the scheme involves adjusting the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) and the third electronic expansion valve 13 (i.e., electronic expansion valve C), and adjusting the temperature difference before and after electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 to determine if the high-temperature evaporator temperature sensor 51, the low-temperature evaporator temperature sensor 52, the high-temperature suction temperature sensor 32, and the low-temperature suction temperature sensor 31 are installed incorrectly. This allows for rapid identification of the cause of the abnormality and feedback of the fault, facilitating quick troubleshooting, ensuring the air conditioning's heat exchange effect, and improving the user experience.

[0038] In some embodiments, step S130, adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, includes the process of adjusting the opening degree of the outdoor throttling device.

[0039] The following is combined with Figure 3 The flowchart shown is a schematic diagram of an embodiment of the method of the present invention for adjusting the opening of the outdoor throttling device. It further illustrates the specific process of adjusting the opening of the outdoor throttling device in step S130, including steps S210 to S220.

[0040] Step S210, adjusting the opening of the main throttling device, includes: adjusting the opening of the main throttling device from a first set main opening to a second set main opening; wherein, the second set main opening is opening X2A.

[0041] Step S220, after a first set interval time following the adjustment of the main throttling device opening from a first set main opening to a second set main opening, restores the main throttling device opening and adjusts the secondary throttling device opening, including: restoring the main throttling device opening from the second set main opening to the first set main opening, and adjusting the secondary throttling device opening from the first set secondary opening to the second set secondary opening; so that after a second set interval time, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening of the at least one throttling device, at least one of the first type of fault, the second type of fault, and the third type of fault can be detected: specifically, based on the detection values ​​of the air conditioner's inner pipe temperature sensor before and after adjusting the opening of the main throttling device and the secondary throttling device, the first type of fault can be detected. Wherein, the second set secondary opening is such as opening x 2B. The first set interval time is such as 58s~62s, preferably 60s (seconds). The second set interval time is such as 58s~62s, preferably 60s (seconds).

[0042] The present invention addresses the challenge of troubleshooting after-sales issues in air conditioners with complex dual-suction, single-row circulation systems. It provides a method for detecting faults in such systems without requiring additional equipment. This method enables fault detection of two functionally identical and geographically close components—the electronic expansion valve, the suction temperature sensor, and the evaporator temperature sensor—without disassembling the unit, allowing for the identification of the cause and feedback of the fault, thus shortening after-sales troubleshooting time.

[0043] In some embodiments, step S130, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, adjusting the opening degree of the outdoor throttling device includes: adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device. Step S140, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault. This includes: implementing the process of detecting the first fault, specifically: implementing the process of detecting the first fault based on the detection values ​​of the air conditioner's inner pipe temperature sensor before and after adjusting the opening degrees of the main throttling device and the auxiliary throttling device.

[0044] The following is combined with Figure 8 The flowchart shown is an embodiment of the process of detecting the first type of fault in the method of the present invention. It further illustrates the specific process of detecting the first type of fault in step S140, including steps S310 to S340.

[0045] Step S310: When adjusting the opening of the main throttling device and the opening of the auxiliary throttling device, the detection value of the first inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the first inner tube; the detection value of the first inner tube temperature sensor after adjusting the opening of the main throttling device is recorded as the second temperature of the first inner tube; and the detection value of the first inner tube temperature sensor after adjusting the opening of the auxiliary throttling device is recorded as the third temperature of the first inner tube. The first temperature of the first inner tube is like the temperature TZH1 before adjusting the electronic expansion valve A by the high-temperature evaporator temperature sensor 51; the second temperature of the first inner tube is like the temperature TZH2 after adjusting the electronic expansion valve A by the high-temperature evaporator temperature sensor 51; and the third temperature of the first inner tube is like the temperature TZH3 after adjusting the electronic expansion valve B by the high-temperature evaporator temperature sensor 51.

[0046] Step S320: Determine whether the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and whether the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube.

[0047] Step S330: If the condition is satisfied, then the assembly positions of the main throttling device and the auxiliary throttling device are determined to be normal.

[0048] Step S340: If it is determined that the condition is not met, then the assembly position of the main throttling device and the auxiliary throttling device is determined to be abnormal, and a reminder message indicating that the assembly position of the main throttling device and the auxiliary throttling device is abnormal is issued.

[0049] Figure 8 This is a flowchart illustrating the control function of an air conditioner fault detection device. Figure 9 As shown, the control function flow of the air conditioner fault detection device includes: sending commands, collecting data, analyzing data (i.e., data analysis), fault judgment (i.e., air conditioner anomaly judgment), and outputting detection results (such as fault records, storage, and display lights) through the air conditioner unit's own control device. Figure 9 This is a flowchart illustrating the control logic of an air conditioner fault detection device. (Example:) Figure 4 As shown, the control logic flow of the air conditioner fault detection device includes: Step 1: Turn on the air conditioning unit. The user or testing personnel input the system test signal and open the first electronic expansion valve 11 (i.e., electronic expansion valve A), the second electronic expansion valve 12 (i.e., electronic expansion valve B), and the third electronic expansion valve 13 (i.e., electronic expansion valve C) respectively (X1A, X1B, X1C). The fan (i.e., the outdoor fan) starts, the compressor starts and increases the frequency to f1Hz, and then proceed to step 2.

[0050] In step 1, a detection command is sent to the air conditioning unit via the air conditioning remote control. The air conditioning unit operates in detection mode according to the command (i.e., the entire detection process is called detection mode). The first electronic expansion valve 11 (i.e., electronic expansion valve A), the second electronic expansion valve 12 (i.e., electronic expansion valve B), and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are opened X1A, X1B, and X1C respectively. X1A refers to the opening degree of the first electronic expansion valve 11 (i.e., electronic expansion valve A), X1B refers to the opening degree of the second electronic expansion valve 12 (i.e., electronic expansion valve B), and X1C refers to the opening degree of the third electronic expansion valve 13 (i.e., electronic expansion valve C). The range of X1A, X1B, and X1C is 50B to -400B. The fan starts, the compressor starts and the frequency is increased to a frequency f1Hz, which ranges from 50Hz to -60Hz. After stabilization, step 2 is executed.

[0051] Step 2: Adjust the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) from X1A to X2A, while keeping other parameters unchanged; record the temperature TZH1 before adjusting electronic expansion valve A and the temperature TZH2 after adjusting electronic expansion valve A by the temperature sensing bulb 51 of the high-temperature evaporator; adjust the temperature TZL1 before adjusting electronic expansion valve A and the temperature TZL2 after adjusting electronic expansion valve A by the temperature sensing bulb 52 of the low-temperature evaporator; then proceed to step 3.

[0052] In step 2, the first electronic expansion valve 11 (i.e., electronic expansion valve A), the second electronic expansion valve 12 (i.e., electronic expansion valve B), and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are opened respectively (X1A, X1B, X1C). The fan is started, the compressor is turned on and the frequency is increased to f1Hz. After stabilization, the first electronic expansion valve 11 (i.e., electronic expansion valve A) is monitored. The opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) is reduced from X1A to X2A, where X2A ranges from 50B to -400B, while other parameters remain unchanged. The temperature before electronic expansion valve A (TZH1) and the temperature after electronic expansion valve A (TZH2) of the high-temperature evaporator temperature sensor 51 are recorded. The temperature before electronic expansion valve A (TZL1) and the temperature after electronic expansion valve A (TZL2) of the low-temperature evaporator temperature sensor 52 are also recorded. Then, step 3 is executed.

[0053] Step 3: Adjust the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) from X2A back to X1A, and adjust the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) from X1B to X2B, while keeping other parameters unchanged; record the temperature TZH3 after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve B, and record the temperature TZL3 after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve B, and then proceed to step 4.

[0054] In step 3, after adjusting the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) from X1A to X2A in step 2, and recording the temperature TZH1 before adjusting electronic expansion valve A by the high-temperature evaporator temperature sensor 51 and the temperature TZH2 after adjusting electronic expansion valve A, and recording the temperature TZL1 before adjusting electronic expansion valve A by the low-temperature evaporator temperature sensor 52 and the temperature TZL2 after adjusting electronic expansion valve A, the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) is adjusted back from X2A to X1A, and the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) is adjusted from X1B to X2B, where X2B ranges from 50B to -400B, and other parameters remain unchanged. After the adjustment is in place, the temperature TZH3 after adjusting electronic expansion valve B by the high-temperature evaporator temperature sensor 51 and the temperature TZL3 after adjusting electronic expansion valve B by the low-temperature evaporator temperature sensor 52 are recorded. Then, step 4 is executed.

[0055] Step 4: Determine if TZH2-TZH1>0 and TZH2-TZH1>TZH3-TZH1: If satisfied, determine that the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are correctly assembled, and then proceed to step 5; if not satisfied, determine that the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are incorrectly assembled, report an abnormal assembly position of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) and record it.

[0056] In step 4, the temperature change of the high-temperature evaporator sensing bulb 51 is compared. Since the first electronic expansion valve 11 (i.e., electronic expansion valve A) is the main throttling valve, the refrigerant flow decreases and the evaporator temperature rises after the opening is reduced. The change value of adjusting the first electronic expansion valve 11 (i.e., electronic expansion valve A) will be greater than the change value of adjusting the second electronic expansion valve 12 (i.e., electronic expansion valve B). Therefore, it is determined whether TZH2-TZH1>0 and TZH2-TZH1>TZH3-TZH1 are satisfied. If so, i.e., TZH2-TZH1>0 and TZH2-TZH1>TZH3-TZH1, then the assembly position of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) is correct, and then step 5 is executed; otherwise, an abnormal assembly position of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) is reported and recorded. Adjusting the temperature TZH1 of the high-temperature evaporator sensing bulb 51 before electronic expansion valve A, adjusting the temperature TZH2 of the high-temperature sensing bulb after electronic expansion valve A, and adjusting the temperature TZH3 after the second electronic expansion valve 12 (i.e., electronic expansion valve B) is to determine whether the positions of electronic expansion valve A and electronic expansion valve B are incorrect by judging the difference in temperature changes of the high-temperature sensing bulb before and after adjusting electronic expansion valve A and electronic expansion valve B.

[0057] In this invention, the opening degrees of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the temperature sensing bulb 51 of the high-temperature evaporator and the temperature sensing bulb 52 of the low-temperature evaporator to determine whether the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly; the opening degrees of the second electronic expansion valve 12 (i.e., electronic expansion valve B) and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the temperature sensing bulb 51 of the high-temperature evaporator and the temperature sensing bulb 52 of the low-temperature evaporator. By adjusting the temperature difference before and after the electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52, the system can determine whether the high-temperature evaporator temperature sensor 51, the low-temperature evaporator temperature sensor 52, the high-temperature suction temperature sensor 32, and the low-temperature suction temperature sensor 31 are installed incorrectly. This solves the problem of insufficient system operating capacity, low efficiency, and difficulty in after-sales troubleshooting caused by incorrect installation of multiple electronic expansion valves and multiple temperature sensors. It enables rapid identification of after-sales fault points, resolves the problems of insufficient system operating capacity and low efficiency, and improves user comfort.

[0058] In some embodiments, step S130, adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, further includes the process of adjusting the opening degree of the outdoor throttling device and adjusting the opening degree of the indoor throttling device, as detailed below: When adjusting the opening of the secondary throttling device, specifically after reducing the opening of the secondary throttling device from a first set secondary opening to a second set secondary opening, preferably after adjusting the opening of the primary throttling device (i.e., after reducing the opening of the primary throttling device from the first set primary opening to the second set primary opening and then restoring the opening of the primary throttling device from the second set primary opening to the first set primary opening), and after adjusting the opening of the secondary throttling device from the first set secondary opening to the second set secondary opening, after a second set interval, restoring the opening of the secondary throttling device and adjusting the opening of the indoor throttling device, includes: adjusting the opening of the secondary throttling device from the second set secondary opening back to the first set primary opening. The system returns to the first set secondary opening degree and adjusts the opening degree of the indoor throttling device from the first set indoor opening degree to the second set indoor opening degree. After a third set interval, it continues to detect at least one of the following faults: the first fault, the second fault, and the third fault, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's suction temperature sensor before and after adjusting the opening degree of the at least one throttling device. Specifically, it detects the second fault and the third fault based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's suction temperature sensor before and after adjusting the opening degrees of the main throttling device, the secondary throttling device, and the indoor throttling device. The second set indoor opening degree is, for example, opening degree x 2C. The third set interval is, for example, 58s~62s, preferably 60s (seconds).

[0059] In some embodiments, step S130, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, includes adjusting the opening degree of the outdoor throttling device, which further includes adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device. Step S140, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault. It also includes the process of detecting the second fault, specifically: based on the detection values ​​of the air conditioner's inner pipe temperature sensor before and after adjusting the opening degrees of the main throttling device, the auxiliary throttling device, and the indoor throttling device, the process of detecting the second fault is achieved.

[0060] The following is combined with Figure 9 The flowchart shown is an embodiment of the process of detecting the second type of fault in the method of the present invention. It further illustrates the specific process of detecting the second type of fault in step S140, including steps S410 to S450.

[0061] Step S410: When adjusting the opening of the main throttling device, adjusting the opening of the auxiliary throttling device, and adjusting the indoor throttling device, the detection value of the first inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the first inner tube; the detection value of the first inner tube temperature sensor after adjusting the opening of the main throttling device is recorded as the second temperature of the first inner tube; and the detection value of the first inner tube temperature sensor after adjusting the opening of the auxiliary throttling device is recorded as the third temperature of the first inner tube; the opening of the indoor throttling device is adjusted... The detected value of the first inner tube temperature sensor after the temperature change is recorded as the fourth temperature of the first inner tube; wherein, the first temperature of the first inner tube is like the temperature before the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH1; the second temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH2; the third temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve B, TZH3; and the fourth temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve C, TZH4.

[0062] And, in step S420, when adjusting the opening of the main throttling device and the indoor throttling device, the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the second inner tube, and the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube; specifically, the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the second inner tube, the detection value of the second inner tube temperature sensor after adjusting the opening of the main throttling device is recorded as the second temperature of the second inner tube, and the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube. The detection value of the second inner tube temperature sensor is recorded as the third temperature of the second inner tube; the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube; wherein, the first temperature of the second inner tube is like the temperature before the adjustment of the electronic expansion valve A by the low-temperature evaporator temperature sensor 52, TZL1; the second temperature of the second inner tube is like the temperature after the adjustment of the electronic expansion valve A by the low-temperature evaporator temperature sensor 52, TZL2; the third temperature of the second inner tube is like the temperature after the adjustment of the electronic expansion valve B by the low-temperature evaporator temperature sensor 52, TZL3; and the fourth temperature of the second inner tube is like the temperature after the adjustment of the electronic expansion valve C by the low-temperature evaporator temperature sensor 52, TZL4.

[0063] Step S430: If it is determined that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, then determine whether the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0.

[0064] Step S440: If the condition is satisfied, then the assembly positions of the first inner tube temperature sensor and the second inner tube temperature sensor are determined to be normal.

[0065] Step S450: If it is determined that the condition is not met, then it is determined that the assembly position of the first inner tube temperature sensor and the second inner tube temperature sensor is abnormal, and a reminder message indicating that the assembly position of the first inner tube temperature sensor and the second inner tube temperature sensor is abnormal is issued.

[0066] like Figure 5 As shown, the control logic flow of the air conditioner fault detection device, after step 4, also includes: Step 5: Adjust the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) from X2B back to X1B, and reduce the opening of the third electronic expansion valve 13 (i.e., electronic expansion valve C) from X1C to X2C, keeping other parameters unchanged; record the temperature TZH4 after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve C, record the temperature TZL4 after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve C, record the temperature TXH1 before the high-temperature suction temperature sensor 32 adjusts the electronic expansion valve C, record the temperature TXL1 before the low-temperature suction temperature sensor 31 adjusts the electronic expansion valve C, record the temperature TXH2 after the high-temperature suction temperature sensor 32 adjusts the electronic expansion valve C, and record the temperature TXL2 after the low-temperature suction temperature sensor 31 adjusts the electronic expansion valve C. Then proceed to step 6. X1A is greater than X2A; X1B is greater than X2B; X1C is greater than X2C.

[0067] In step 5, after verifying electronic expansion valve A or electronic expansion valve B in step 4, the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) is adjusted from X2B back to X1B, and the opening of the third electronic expansion valve 13 (i.e., electronic expansion valve C) is reduced from X1C to X2C. The range of X2C is 50B to -400B. After adjustment, the temperature TZH4 after the high-temperature evaporator temperature sensing bulb 51 adjusts the electronic expansion valve C is recorded, the temperature TZL4 after the low-temperature evaporator temperature sensing bulb 52 adjusts the electronic expansion valve C is recorded, the temperature TXH1 before the high-temperature suction temperature sensing bulb 32 adjusts the electronic expansion valve C is recorded, the temperature TXL1 before the low-temperature suction temperature sensing bulb 31 adjusts the electronic expansion valve C is recorded, the temperature TXH2 after the high-temperature suction temperature sensing bulb 32 adjusts the electronic expansion valve C is recorded, and the temperature TXL2 after the low-temperature suction temperature sensing bulb 31 adjusts the electronic expansion valve C is recorded. Then, step 6 is executed.

[0068] Step 6: Determine if TZH1-TZH4>0 and TZL1-TZL4<0 are satisfied. If satisfied, the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 are correctly assembled, and then proceed to step 7. If not satisfied, the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 are incorrectly assembled, and an abnormal position of the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 is reported and recorded.

[0069] In step 6, the electronic expansion valve C in step 5 is reduced, resulting in a decrease in the amount of refrigerant entering the low-temperature evaporator and an increase in the amount of refrigerant entering the high-temperature evaporator. Consequently, the temperature of the high-temperature evaporator decreases, and the temperature of the low-temperature evaporator increases. Therefore, it is determined whether the conditions TZH1-TZH4>0 and TZL1-TZL4<0 are met. If so, that is, TZH1-TZH4>0 and TZL1-TZL4<0, then the assembly positions of the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 are confirmed to be correct, and then step 7 is executed. Otherwise, an abnormal position of the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 is reported and recorded.

[0070] The present invention uses the temperature sensor value of the air conditioner's inner pipe before and after adjusting the opening of the main throttling device, the secondary throttling device, and the indoor throttling device to detect the second type of fault, thereby improving the efficiency of fault diagnosis and resolution for air conditioners with complex dual-suction and single-row circulation systems.

[0071] In some embodiments, step S130, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, includes adjusting the opening degree of the outdoor throttling device, which further includes adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device. Step S140, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault. It also includes a process for detecting the third fault, specifically: based on the detection values ​​of the air conditioner's inner pipe temperature sensor and the air conditioner's intake temperature sensor before and after adjusting the opening degrees of the main throttling device, the auxiliary throttling device, and the indoor throttling device, the process for detecting the third fault is achieved.

[0072] The following is combined with Figure 9 The flowchart shown is an embodiment of the process of detecting the third type of fault in the method of the present invention. It further illustrates the specific process of detecting the third type of fault in step S140, including steps S510 to S560.

[0073] Step S510: When adjusting the opening of the main throttling device, adjusting the opening of the auxiliary throttling device, and adjusting the indoor throttling device, the detection value of the first inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the first inner tube; the detection value of the first inner tube temperature sensor after adjusting the opening of the main throttling device is recorded as the second temperature of the first inner tube; and the detection value of the first inner tube temperature sensor after adjusting the opening of the auxiliary throttling device is recorded as the third temperature of the first inner tube; the opening of the indoor throttling device is adjusted... The detected value of the first inner tube temperature sensor after the temperature change is recorded as the fourth temperature of the first inner tube; wherein, the first temperature of the first inner tube is like the temperature before the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH1; the second temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH2; the third temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve B, TZH3; and the fourth temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve C, TZH4.

[0074] And, in step S520, when adjusting the opening of the main throttling device and the indoor throttling device, the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the second inner tube, and the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube; specifically, the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device is recorded as the first temperature of the second inner tube, the detection value of the second inner tube temperature sensor after adjusting the opening of the main throttling device is recorded as the second temperature of the second inner tube, and the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube. The detection value of the second inner tube temperature sensor is recorded as the third temperature of the second inner tube; the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube; wherein, the first temperature of the second inner tube is like the temperature before the adjustment of the electronic expansion valve A by the low-temperature evaporator temperature sensor 52, TZL1; the second temperature of the second inner tube is like the temperature after the adjustment of the electronic expansion valve A by the low-temperature evaporator temperature sensor 52, TZL2; the third temperature of the second inner tube is like the temperature after the adjustment of the electronic expansion valve B by the low-temperature evaporator temperature sensor 52, TZL3; and the fourth temperature of the second inner tube is like the temperature after the adjustment of the electronic expansion valve C by the low-temperature evaporator temperature sensor 52, TZL4.

[0075] And, in step S530, when adjusting the indoor throttling device, the detection value of the first intake temperature sensor before adjusting the indoor throttling device is recorded as the first temperature of the first intake port, and the detection value of the first intake temperature sensor after adjusting the indoor throttling device is recorded as the second temperature of the first intake port; the detection value of the second intake temperature sensor before adjusting the indoor throttling device is recorded as the first temperature of the second intake port, and the detection value of the second intake temperature sensor after adjusting the indoor throttling device is recorded as the second temperature of the second intake port; wherein, the first temperature of the first intake port is like the temperature before the high-temperature intake temperature sensor 32 adjusts the electronic expansion valve C (TXH1), the second temperature of the first intake port is like the temperature after the high-temperature intake temperature sensor 32 adjusts the electronic expansion valve C (TXH2), the first temperature of the second intake port is like the temperature before the low-temperature intake temperature sensor 31 adjusts the electronic expansion valve C (TXL1), and the second temperature of the second intake port is like the temperature after the low-temperature intake temperature sensor 31 adjusts the electronic expansion valve C (TXL2).

[0076] Step S540: If it is determined that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, and it is determined that the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0, then it is determined whether the conditions are met that the difference between the second temperature of the first air intake port and the first temperature of the first air intake port is less than 0, and the difference between the second temperature of the second air intake port and the first temperature of the second air intake port is greater than 0.

[0077] Step S550: If the condition is satisfied, then the assembly positions of the first and second inhalation temperature sensors are determined to be normal.

[0078] Step S560: If it is determined that the condition is not met, then it is determined that the assembly position of the first inhalation temperature sensor and the second inhalation temperature sensor is abnormal, and a reminder message indicating that the assembly position of the first inhalation temperature sensor and the second inhalation temperature sensor is abnormal is issued.

[0079] like Figure 7 As shown, the control logic flow of the air conditioner fault detection device, after step 6, also includes: Step 7: Determine if TXH2-TXH1<0 and TXL2-TXL1>0 are satisfied: If satisfied, the high-temperature intake temperature sensor 32 and the low-temperature intake temperature sensor 31 are confirmed to be correctly assembled, and the test ends. If a fault is detected during the test, the display will output a fault record; if not satisfied, the high-temperature intake temperature sensor 32 and the low-temperature intake temperature sensor 31 are confirmed to be incorrectly assembled, and an abnormal position of the high-temperature intake temperature sensor 32 and the low-temperature intake temperature sensor 31 will be reported and recorded.

[0080] In step 7, similar to step 6, the refrigerant detected by the high-temperature suction sensor 32 flows from the high-temperature evaporator, and the refrigerant detected by the low-temperature suction sensor 31 flows from the low-temperature evaporator. Therefore, it is determined whether the conditions TXH2-TXH1 < 0 and TXL2-TXL1 > 0 are met. If so, i.e., TXH2-TXH1 < 0 and TXL2-TXL1 > 0, then the high-temperature suction sensor 32 and the low-temperature suction sensor 31 are correctly positioned. Otherwise, an abnormal position of the high-temperature suction sensor 32 and the low-temperature suction sensor 31 is reported and recorded. The test ends. If any abnormal data is recorded during the test, the abnormal data is output. After-sales engineers investigate and repair the abnormal data. After repair, testing can continue until no fault data is output. Specifically, the high-temperature evaporator temperature sensing bulb 51 adjusts the temperature before electronic expansion valve A (TZH1), the temperature after electronic expansion valve A (TZH2), the temperature after electronic expansion valve B (TZH3), and the temperature after electronic expansion valve C (TZH4); the low-temperature evaporator temperature sensing bulb 52 adjusts the temperature before electronic expansion valve A (TZL1), the temperature after electronic expansion valve A (TZL2), the temperature after electronic expansion valve B (TZL3), and the temperature after electronic expansion valve C (TZL4); the high-temperature suction temperature sensing bulb 32 adjusts the temperature before electronic expansion valve C (TXH1), the temperature after electronic expansion valve C (TXH2); and the low-temperature suction temperature sensing bulb 31 adjusts the temperature before electronic expansion valve C (TXL1), the temperature after electronic expansion valve C (TXL2). See Table 1 for details.

[0081]

[0082] In the present invention, the opening degrees of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the high-temperature evaporator sensing bulb 51 and the low-temperature evaporator sensing bulb 52 to determine whether the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly; the opening degrees of the second electronic expansion valve 12 (i.e., electronic expansion valve B) and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the high-temperature evaporator sensing bulb 51 and the low-temperature evaporator sensing bulb 52 to determine whether the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly. The temperature difference before and after the electronic expansion valve A is adjusted by the temperature sensing bulbs 51 and 52 of the high-temperature evaporator and 52 of the low-temperature evaporator to determine whether the temperature sensing bulbs 51, 52, 32, and 31 of the high-temperature suction valve are installed incorrectly. This invention solves the problem of insufficient system performance, low efficiency, and difficulty in after-sales troubleshooting caused by incorrect installation of multiple electronic expansion valves and temperature sensing bulbs. It enables rapid identification of after-sales fault points, resolves insufficient system performance and low efficiency, and improves user comfort.

[0083] In this invention, the outdoor unit operation test utilizes a fault detection method for complex air conditioning outdoor units to achieve comprehensive testing of the outdoor unit's operation. This invention provides a fault detection method for air conditioners with complex dual-suction, single-row circulation systems. Without adding extra devices, it solves the problem of troubleshooting after-sales anomalies in these systems. It enables fault detection of two functionally identical and geographically close components—the electronic expansion valve, the suction temperature sensor, and the evaporator temperature sensor—within the complex circulation system. The cause can be found without disassembling the unit, and the fault can be reported, shortening after-sales troubleshooting time. This invention solves the problem of troubleshooting after-sales anomalies in air conditioning systems with complex dual-suction, single-row circulation systems; and, without adding extra devices, it enables fault detection of two functionally identical and geographically close components—the electronic expansion valve, the suction temperature sensor, and the evaporator temperature sensor—within the complex circulation system. The cause can be found without disassembling the unit, and the fault can be reported.

[0084] The technical solution adopted in this embodiment is designed for outdoor units with dual-suction single-row compressors and outdoor heat exchangers (such as...). Figure 7 The condenser shown), main throttling device (such as) Figure 7 The electronic expansion valve A and the auxiliary throttling device (as shown) are shown. Figure 7 The electronic expansion valve B shown), and the indoor unit having a first indoor heat exchanger (such as...) Figure 7 The high-temperature evaporator shown), and the second indoor heat exchanger (such as...) Figure 7 The low-temperature evaporator shown) and the indoor throttling device (such as) installed on the pipeline where the second indoor heat exchanger is located Figure 7 The air conditioner with the electronic expansion valve C shown has a first suction temperature sensor (such as...) installed at the first suction port of the compressor.Figure 7 As shown, a high-temperature suction sensor 32 is installed at the high-temperature suction port of the compressor, and a second suction sensor (such as...) is installed at the second suction port of the compressor. Figure 6 The diagram shows a low-temperature suction sensor 31 installed at the low-temperature suction port of the compressor, a first inner tube sensor (e.g., a high-temperature evaporator sensor 51 installed at the high-temperature evaporator), and a second inner tube sensor (e.g., a low-temperature evaporator sensor 52 installed at the low-temperature evaporator) installed at the second indoor heat exchanger. In the air conditioning operation detection mode (i.e., a mode that performs at least one of the following detections: detecting whether the assembly positions of the main throttling device and the auxiliary throttling device are abnormal, detecting whether the assembly positions of the first inner tube sensor and the second inner tube sensor are abnormal, and detecting whether the assembly positions of the first suction sensor and the second suction sensor are abnormal), the opening degree of at least one of the main throttling device, the auxiliary throttling device, and the indoor throttling device is adjusted according to the adjustment of the corresponding throttling device. By measuring the detection values ​​of the first and second inner tube temperature sensors before and after installation, and / or the detection values ​​of the first and second intake temperature sensors, the system detects whether at least one of the following assembly positions is abnormal: the main throttling device and the auxiliary throttling device; the first and second inner tube temperature sensors; or the first and second intake temperature sensors. This allows the system to determine if the air conditioning load is incorrectly installed. Furthermore, by adjusting the opening of at least one of the main and auxiliary throttling devices in the outdoor unit and the indoor throttling device in the indoor unit, and based on changes in the temperature sensor detection values, the system can quickly and accurately determine if the air conditioning has a fault due to incorrect load installation. This allows for precise troubleshooting, ensuring efficient heat exchange and improving the user experience.

[0085] According to an embodiment of the present invention, an air conditioner control device corresponding to the air conditioner control method is also provided. See also Figure 7 The diagram shows a structural schematic of an embodiment of the device of the present invention. The outdoor unit of the air conditioner includes a compressor and an outdoor throttling device having a main throttling device and a secondary throttling device. The compressor has a first suction port and a second suction port. A first suction temperature sensor is provided at the first suction port, and a second suction temperature sensor is provided at the second suction port. The indoor unit of the air conditioner includes a first indoor heat exchanger, a second indoor heat exchanger, and an indoor throttling device disposed on the pipeline where the second indoor heat exchanger is located. A first inner tube temperature sensor is provided at the first indoor heat exchanger, and a second inner tube temperature sensor is provided at the second indoor heat exchanger. The main throttling device is as follows: Figure 7 The electronic expansion valve A shown, the auxiliary throttling device as follows Figure 7 The electronic expansion valve B shown is located at the first suction port of the compressor. Figure 7 The compressor's high-temperature suction port is shown, and the compressor's second suction port is as follows:Figure 7 The compressor's low-temperature suction port is shown, and the first suction temperature sensing bulb is as follows: Figure 7 The high-temperature inhalation temperature sensor 32 shown, the second inhalation temperature sensor as shown Figure 7 The low-temperature suction sensing bulb 31 shown, the first indoor heat exchanger as... Figure 7 The high-temperature evaporator shown, the second indoor heat exchanger as... Figure 7 The low-temperature evaporator shown has an indoor throttling device as described. Figure 6 The electronic expansion valve C shown has a first inner tube temperature sensing bulb as... Figure 8 The high-temperature evaporator temperature sensing bulb 51 shown, and the second inner tube temperature sensing bulb as shown... Figure 8 The low-temperature evaporator sensing bulb 52 is shown. In the embodiment of the present invention, as... Figure 9 As shown, the control device of the air conditioner includes: an acquisition unit 102 and a control unit 104.

[0086] The control unit 104 is configured to, when the air conditioner enters its detection mode, control the opening degree of the main throttling device to a first preset main opening degree, the opening degree of the auxiliary throttling device to a first preset auxiliary opening degree, and the opening degree of the indoor throttling device to a first preset indoor opening degree, control the air conditioner's fan to start, and control the compressor to start and increase its frequency to a first preset frequency. The detection mode of the air conditioner is a mode for detecting at least one of the following faults: a first fault is a fault related to whether the assembly positions of the main throttling device and the auxiliary throttling device are abnormal; a second fault is a fault related to whether the assembly positions of the first inner tube temperature sensor and the second inner tube temperature sensor are abnormal; and a third fault is a fault related to whether the assembly positions of the first suction temperature sensor and the second suction temperature sensor are abnormal. The first preset main opening degree is, for example, opening degree X1A; the first preset auxiliary opening degree is, for example, opening degree X1B; the first preset indoor opening degree is, for example, opening degree X1C; and the first preset frequency is, for example, frequency f1Hz. The specific functions and processing of the control unit 104 are described in step S110.

[0087] The acquisition unit 102 is configured to, when the air conditioner enters its detection mode, acquire the detection values ​​of the first inner tube temperature sensor and the second inner tube temperature sensor, and record them as the inner tube temperature sensor detection values ​​of the air conditioner; and to acquire the detection values ​​of the first intake temperature sensor and the second intake temperature sensor, and record them as the intake temperature sensor detection values ​​of the air conditioner; wherein, the detection value of the first inner tube temperature sensor is, for example, the temperature of the high-temperature evaporation temperature sensor (TZH), the detection value of the second inner tube temperature sensor is, for example, the temperature of the low-temperature evaporation temperature sensor (TZL), the detection value of the first intake temperature sensor is, for example, the temperature of the high-temperature intake temperature sensor (TXH), and the detection value of the second intake temperature sensor is, for example, the temperature of the low-temperature intake temperature sensor (TXL). For the specific functions and processing of this acquisition unit 102, please refer to step S120.

[0088] The control unit 104 is further configured to, when the air conditioner enters its detection mode, after setting an operating time, that is, after controlling the opening degree of the main throttling device to a first set main opening degree, the opening degree of the auxiliary throttling device to a first set auxiliary opening degree, and the opening degree of the indoor throttling device to a first set indoor opening degree, control the air conditioner's fan to start, control the compressor to start and increase its frequency to a first set frequency, and after controlling the air conditioner to run for a set operating time, adjust the opening degree of at least one of the outdoor throttling device and the indoor throttling device. The specific functions and processing of this control unit 104 are further described in step S130.

[0089] The control unit 104 is further configured to detect at least one of the first type of fault, the second type of fault, and the third type of fault based on the detection values ​​of the inner pipe temperature sensor and / or the intake temperature sensor of the air conditioner before and after adjusting the opening of the at least one throttling device. This allows for quick and accurate determination of whether the air conditioner has a fault due to incorrect load assembly, facilitating precise fault removal, ensuring the air conditioner's heat exchange effect, and improving the user experience. The specific functions and processing of this control unit 104 are further described in step S140.

[0090] Preferably, the control unit 104 is further configured to initiate an alert message indicating that the air conditioner has at least one fault if the at least one fault is detected, so that maintenance personnel can accurately locate and troubleshoot the fault based on the detected at least one fault, ensuring the heat exchange effect of the air conditioner and improving the user experience. The specific functions and processing of the control unit 104 are further described in step S150.

[0091] This invention proposes a fault detection scheme for air conditioning systems with dual-suction and single-row circulation. The scheme involves adjusting the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B), and adjusting the temperature difference before and after electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 to determine if the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly. Similarly, the scheme involves adjusting the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) and the third electronic expansion valve 13 (i.e., electronic expansion valve C), and adjusting the temperature difference before and after electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 to determine if the high-temperature evaporator temperature sensor 51, the low-temperature evaporator temperature sensor 52, the high-temperature suction temperature sensor 32, and the low-temperature suction temperature sensor 31 are installed incorrectly. This allows for rapid identification of the cause of the abnormality and feedback of the fault, facilitating quick troubleshooting, ensuring the air conditioning's heat exchange effect, and improving the user experience.

[0092] In some embodiments, the control unit 104 adjusts the opening degree of at least one of the outdoor throttling device and the indoor throttling device, including: adjusting the opening degree of the outdoor throttling device, specifically as follows: The control unit 104 is further configured to adjust the opening of the main throttling device, including: adjusting the opening of the main throttling device from a first set main opening to a second set main opening; wherein the second set main opening is as shown in opening x2A. The specific functions and processing of the control unit 104 are further described in step S210.

[0093] The control unit 104 is further configured to, after a first predetermined interval following the reduction of the main throttling device's opening from a first predetermined main opening to a second predetermined main opening, restore the opening of the main throttling device and adjust the opening of the secondary throttling device, including: restoring the main throttling device's opening from the second predetermined main opening to the first predetermined main opening, and reducing the secondary throttling device's opening from the first predetermined secondary opening to the second predetermined secondary opening; so that after a second predetermined interval, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening of the at least one throttling device, at least one of the first fault, the second fault, and the third fault can be detected: specifically, based on the detection values ​​of the air conditioner's inner pipe temperature sensor before and after adjusting the opening of the main throttling device and the secondary throttling device, the first fault can be detected. The second predetermined secondary opening is, for example, opening x2B. The specific functions and processing of this control unit 104 are further described in step S220.

[0094] The present invention addresses the challenge of troubleshooting after-sales issues in air conditioners with complex dual-suction, single-row circulation systems. It provides a method for detecting faults in such systems without requiring additional equipment. This method enables fault detection of two functionally identical and geographically close components—the electronic expansion valve, the suction temperature sensor, and the evaporator temperature sensor—without disassembling the unit, allowing for the identification of the cause and feedback of the fault, thus shortening after-sales troubleshooting time.

[0095] In some embodiments, the control unit 104, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, adjusts the opening degree of the outdoor throttling device, including: the control unit 104 is further configured to adjust the opening degree of the main throttling device and adjust the opening degree of the auxiliary throttling device. The control unit 104, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault, including: the process of detecting the first fault specifically involves: based on the detection values ​​of the air conditioner's inner pipe temperature sensor before and after adjusting the opening degrees of the main throttling device and the auxiliary throttling device, the process of detecting the first fault is as follows: The control unit 104 is further configured to, when adjusting the opening of the main throttling device and the opening of the auxiliary throttling device, record the detection value of the first inner tube temperature sensor before adjusting the opening of the main throttling device as the first temperature of the first inner tube, record the detection value of the first inner tube temperature sensor after adjusting the opening of the main throttling device as the second temperature of the first inner tube, and record the detection value of the first inner tube temperature sensor after adjusting the opening of the auxiliary throttling device as the third temperature of the first inner tube; wherein, the first temperature of the first inner tube is like the temperature TZH1 before the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, the second temperature of the first inner tube is like the temperature TZH2 after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, and the third temperature of the first inner tube is like the temperature TZH3 after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve B. The specific functions and processing of this control unit 104 are further described in step S310.

[0096] The control unit 104 is further configured to determine whether the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and whether the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube. The specific functions and processing of this control unit 104 are further described in step S320.

[0097] The control unit 104 is further configured to determine that the assembly positions of the main throttling device and the auxiliary throttling device are not abnormal if the condition is satisfied. The specific functions and processing of the control unit 104 are further described in step S330.

[0098] The control unit 104 is further configured to, if it is determined that the assembly positions of the main throttling device and the auxiliary throttling device are abnormal, issue a warning message indicating that the assembly positions of the main throttling device and the auxiliary throttling device are abnormal if the condition is not met. The specific functions and processing of this control unit 104 are further described in step S340.

[0099] Figure 9 This is a flowchart illustrating the control function of an air conditioner fault detection device. Figure 9 As shown, the control function flow of the air conditioner fault detection device includes: sending commands, collecting data, analyzing data (i.e., data analysis), fault judgment (i.e., air conditioner anomaly judgment), and outputting detection results (such as fault records, storage, and display lights) through the air conditioner unit's own control device. Figure 9 This is a flowchart illustrating the control logic of an air conditioner fault detection device. (Example:) ​ As shown, the control logic flow of the air conditioner fault detection device includes: Step 1: Turn on the air conditioning unit. The user or testing personnel input the system test signal and open the first electronic expansion valve 11 (i.e., electronic expansion valve A), the second electronic expansion valve 12 (i.e., electronic expansion valve B), and the third electronic expansion valve 13 (i.e., electronic expansion valve C) respectively (X1A, X1B, X1C). The fan starts, the compressor starts and the frequency is increased to f1Hz. Then proceed to step 2.

[0100] In step 1, a detection command is sent to the air conditioning unit via the air conditioning remote control. The air conditioning unit operates in detection mode according to the command (i.e., the entire detection process is called detection mode). The first electronic expansion valve 11 (i.e., electronic expansion valve A), the second electronic expansion valve 12 (i.e., electronic expansion valve B), and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are opened X1A, X1B, and X1C respectively. X1A refers to the opening degree of the first electronic expansion valve 11 (i.e., electronic expansion valve A), X1B refers to the opening degree of the second electronic expansion valve 12 (i.e., electronic expansion valve B), and X1C refers to the opening degree of the third electronic expansion valve 13 (i.e., electronic expansion valve C). The range of X1A, X1B, and X1C is 50B to -400B. The fan starts, the compressor starts and the frequency is increased to a frequency f1Hz, which ranges from 50Hz to -60Hz. After stabilization, step 2 is executed.

[0101] Step 2: Adjust the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) from X1A to X2A, while keeping other parameters unchanged; record the temperature TZH1 before adjusting electronic expansion valve A and the temperature TZH2 after adjusting electronic expansion valve A by the temperature sensing bulb 51 of the high-temperature evaporator; adjust the temperature TZL1 before adjusting electronic expansion valve A and the temperature TZL2 after adjusting electronic expansion valve A by the temperature sensing bulb 52 of the low-temperature evaporator; then proceed to step 3.

[0102] In step 2, the first electronic expansion valve 11 (i.e., electronic expansion valve A), the second electronic expansion valve 12 (i.e., electronic expansion valve B), and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are opened respectively (X1A, X1B, X1C). The fan is started, the compressor is turned on and the frequency is increased to f1Hz. After stabilization, the first electronic expansion valve 11 (i.e., electronic expansion valve A) is monitored. The opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) is reduced from X1A to X2A, where X2A ranges from 50B to -400B, while other parameters remain unchanged. The temperature before electronic expansion valve A (TZH1) and the temperature after electronic expansion valve A (TZH2) of the high-temperature evaporator temperature sensor 51 are recorded. The temperature before electronic expansion valve A (TZL1) and the temperature after electronic expansion valve A (TZL2) of the low-temperature evaporator temperature sensor 52 are also recorded. Then, step 3 is executed.

[0103] Step 3: Adjust the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) from X2A back to X1A, and adjust the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) from X1B to X2B, while keeping other parameters unchanged; record the temperature TZH3 after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve B, and record the temperature TZL3 after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve B, and then proceed to step 4.

[0104] In step 3, after adjusting the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) from X1A to X2A in step 2, and recording the temperature TZH1 before adjusting electronic expansion valve A by the high-temperature evaporator temperature sensor 51 and the temperature TZH2 after adjusting electronic expansion valve A, and recording the temperature TZL1 before adjusting electronic expansion valve A by the low-temperature evaporator temperature sensor 52 and the temperature TZL2 after adjusting electronic expansion valve A, the opening of the first electronic expansion valve 11 (i.e., electronic expansion valve A) is adjusted back from X2A to X1A, and the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) is adjusted from X1B to X2B, where X2B ranges from 50B to -400B, and other parameters remain unchanged. After the adjustment is in place, the temperature TZH3 after adjusting electronic expansion valve B by the high-temperature evaporator temperature sensor 51 and the temperature TZL3 after adjusting electronic expansion valve B by the low-temperature evaporator temperature sensor 52 are recorded. Then, step 4 is executed.

[0105] Step 4: Determine if TZH2-TZH1>0 and TZH2-TZH1>TZH3-TZH1: If satisfied, determine that the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are correctly assembled, and then proceed to step 5; if not satisfied, determine that the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are incorrectly assembled, report an abnormal assembly position of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) and record it.

[0106] In step 4, the temperature change of the high-temperature evaporator sensing bulb 51 is compared. Since the first electronic expansion valve 11 (i.e., electronic expansion valve A) is the main throttling valve, the refrigerant flow decreases and the evaporator temperature rises after the opening is reduced. The change value of adjusting the first electronic expansion valve 11 (i.e., electronic expansion valve A) will be greater than the change value of adjusting the second electronic expansion valve 12 (i.e., electronic expansion valve B). Therefore, it is determined whether TZH2-TZH1>0 and TZH2-TZH1>TZH3-TZH1 are satisfied. If so, i.e., TZH2-TZH1>0 and TZH2-TZH1>TZH3-TZH1, then the assembly position of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) is correct, and then step 5 is executed; otherwise, an abnormal assembly position of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) is reported and recorded. Adjusting the temperature TZH1 of the high-temperature evaporator sensing bulb 51 before electronic expansion valve A, adjusting the temperature TZH2 of the high-temperature sensing bulb after electronic expansion valve A, and adjusting the temperature TZH3 after the second electronic expansion valve 12 (i.e., electronic expansion valve B) is to determine whether the positions of electronic expansion valve A and electronic expansion valve B are incorrect by judging the difference in temperature changes of the high-temperature sensing bulb before and after adjusting electronic expansion valve A and electronic expansion valve B.

[0107] In this invention, the opening degrees of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the temperature sensing bulb 51 of the high-temperature evaporator and the temperature sensing bulb 52 of the low-temperature evaporator to determine whether the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly; the opening degrees of the second electronic expansion valve 12 (i.e., electronic expansion valve B) and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the temperature sensing bulb 51 of the high-temperature evaporator and the temperature sensing bulb 52 of the low-temperature evaporator. By adjusting the temperature difference before and after the electronic expansion valve A using the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52, the system can determine whether the high-temperature evaporator temperature sensor 51, the low-temperature evaporator temperature sensor 52, the high-temperature suction temperature sensor 32, and the low-temperature suction temperature sensor 31 are installed incorrectly. This solves the problem of insufficient system operating capacity, low efficiency, and difficulty in after-sales troubleshooting caused by incorrect installation of multiple electronic expansion valves and multiple temperature sensors. It enables rapid identification of after-sales fault points, resolves the problems of insufficient system operating capacity and low efficiency, and improves user comfort.

[0108] In some embodiments, the control unit 104, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, further includes the process of adjusting the opening degree of the outdoor throttling device and adjusting the opening degree of the indoor throttling device, as detailed below: The control unit 104 is further configured to, when adjusting the opening of the secondary throttling device—that is, after adjusting the opening of the secondary throttling device from a first set secondary opening to a second set secondary opening, preferably after adjusting the opening of the primary throttling device (that is, after adjusting the opening of the primary throttling device from a first set primary opening to a second set primary opening, and adjusting the opening of the primary throttling device back from the second set primary opening to the first set primary opening), and after adjusting the opening of the secondary throttling device from the first set secondary opening to the second set secondary opening, after a second set interval time, restore the opening of the secondary throttling device and adjust the opening of the indoor throttling device, including: adjusting the opening of the secondary throttling device from... The second set secondary opening degree is restored to the first set secondary opening degree, and the opening degree of the indoor throttling device is adjusted from the first set indoor opening degree to the second set indoor opening degree; so that after a third set interval time, the detection of at least one of the first fault, the second fault, and the third fault can continue based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's suction temperature sensor before and after adjusting the opening degree of the at least one throttling device: specifically, the detection of the second fault and the third fault can be achieved based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's suction temperature sensor before and after adjusting the opening degree of the main throttling device, the secondary throttling device, and the indoor throttling device. The second set indoor opening degree is, for example, opening degree x 2C. The third set interval time is, for example, 58s~62s, preferably 60s (seconds).

[0109] In some embodiments, the control unit 104, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, adjusts the opening degree of the outdoor throttling device, including: the control unit 104 is further configured to adjust the opening degree of the main throttling device and adjust the opening degree of the auxiliary throttling device. The control unit 104, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault. The detection process for the second fault specifically involves: based on the detection values ​​of the air conditioner's inner pipe temperature sensor before and after adjusting the opening degrees of the main throttling device, the auxiliary throttling device, and the indoor throttling device, the detection process for the second fault is as follows: The control unit 104 is further configured to, when adjusting the opening of the main throttling device, adjusting the opening of the secondary throttling device, and adjusting the indoor throttling device, record the detection value of the first inner tube temperature sensor before adjusting the opening of the main throttling device as the first temperature of the first inner tube, record the detection value of the first inner tube temperature sensor after adjusting the opening of the main throttling device as the second temperature of the first inner tube, and record the detection value of the first inner tube temperature sensor after adjusting the opening of the secondary throttling device as the third temperature of the first inner tube; and record the detection value of the first inner tube temperature sensor after adjusting the opening of the secondary throttling device as the third temperature of the first inner tube; and to record the detection value of the first inner tube temperature sensor after adjusting the opening of the indoor throttling device. The detection value of the first inner tube temperature sensor after the opening of the flow device is recorded as the fourth temperature of the first inner tube; wherein, the first temperature of the first inner tube is like the temperature before the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH1; the second temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH2; the third temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve B, TZH3; and the fourth temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve C, TZH4. The specific functions and processing of this control unit 104 are further described in step S410.

[0110] Furthermore, the control unit 104 is specifically configured to, when adjusting the opening of the main throttling device and adjusting the indoor throttling device, record the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device as the first temperature of the second inner tube, and record the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device as the fourth temperature of the second inner tube; specifically, record the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device as the first temperature of the second inner tube, record the detection value of the second inner tube temperature sensor after adjusting the opening of the main throttling device as the second temperature of the second inner tube, and adjust the secondary throttling device... The detection value of the second inner tube temperature sensor after the opening is adjusted is recorded as the third temperature of the second inner tube; the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube; wherein, the first temperature of the second inner tube is like the temperature before the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve A, TZL1; the second temperature of the second inner tube is like the temperature after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve A, TZL2; the third temperature of the second inner tube is like the temperature after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve B, TZL3; and the fourth temperature of the second inner tube is like the temperature after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve C, TZL4. The specific functions and processing of this control unit 104 are further described in step S420.

[0111] The control unit 104 is further configured to, when determining that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, determine whether the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0. The specific functions and processing of this control unit 104 are further described in step S430.

[0112] The control unit 104 is further configured to determine, if the condition is satisfied, that the assembly positions of the first inner tube temperature sensor and the second inner tube temperature sensor are not abnormal. The specific functions and processing of this control unit 104 are further described in step S440.

[0113] The control unit 104 is further configured to, if it is determined that the assembly position of the first inner tube temperature sensor and the second inner tube temperature sensor is abnormal, issue a warning message indicating that the assembly position of the first inner tube temperature sensor and the second inner tube temperature sensor is abnormal if the condition is not met. The specific functions and processing of this control unit 104 are further described in step S450.

[0114] like ​ As shown, the control logic flow of the air conditioner fault detection device, after step 4, also includes: Step 5: Adjust the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) from X2B back to X1B, and adjust the opening of the third electronic expansion valve 13 (i.e., electronic expansion valve C) from X1C to X2C, while keeping other parameters unchanged; record the temperature TZH4 after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve C, record the temperature TZL4 after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve C, record the temperature TXH1 before the high-temperature suction temperature sensor 32 adjusts the electronic expansion valve C, record the temperature TXL1 before the low-temperature suction temperature sensor 31 adjusts the electronic expansion valve C, record the temperature TXH2 after the high-temperature suction temperature sensor 32 adjusts the electronic expansion valve C, and record the temperature TXL2 after the low-temperature suction temperature sensor 31 adjusts the electronic expansion valve C, then proceed to step 6.

[0115] In step 5, after verifying electronic expansion valve A or electronic expansion valve B in step 4, the opening of the second electronic expansion valve 12 (i.e., electronic expansion valve B) is adjusted from X2B back to X1B, and the opening of the third electronic expansion valve 13 (i.e., electronic expansion valve C) is reduced from X1C to X2C. The range of X2C is 50B to -400B. After adjustment, the temperature TZH4 after the high-temperature evaporator temperature sensing bulb 51 adjusts the electronic expansion valve C is recorded, the temperature TZL4 after the low-temperature evaporator temperature sensing bulb 52 adjusts the electronic expansion valve C is recorded, the temperature TXH1 before the high-temperature suction temperature sensing bulb 32 adjusts the electronic expansion valve C is recorded, the temperature TXL1 before the low-temperature suction temperature sensing bulb 31 adjusts the electronic expansion valve C is recorded, the temperature TXH2 after the high-temperature suction temperature sensing bulb 32 adjusts the electronic expansion valve C is recorded, and the temperature TXL2 after the low-temperature suction temperature sensing bulb 31 adjusts the electronic expansion valve C is recorded. Then, step 6 is executed.

[0116] Step 6: Determine if TZH1-TZH4>0 and TZL1-TZL4<0 are satisfied. If satisfied, the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 are correctly assembled, and then proceed to step 7. If not satisfied, the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 are incorrectly assembled, and an abnormal position of the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 is reported and recorded.

[0117] In step 6, the electronic expansion valve C in step 5 is reduced, resulting in a decrease in the amount of refrigerant entering the low-temperature evaporator and an increase in the amount of refrigerant entering the high-temperature evaporator. Consequently, the temperature of the high-temperature evaporator decreases, and the temperature of the low-temperature evaporator increases. Therefore, it is determined whether the conditions TZH1-TZH4>0 and TZL1-TZL4<0 are met. If so, that is, TZH1-TZH4>0 and TZL1-TZL4<0, then the assembly positions of the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 are confirmed to be correct, and then step 7 is executed. Otherwise, an abnormal position of the high-temperature evaporator temperature sensor 51 and the low-temperature evaporator temperature sensor 52 is reported and recorded.

[0118] The present invention uses the temperature sensor value of the air conditioner's inner pipe before and after adjusting the opening of the main throttling device, the secondary throttling device, and the indoor throttling device to detect the second type of fault, thereby improving the efficiency of fault diagnosis and resolution for air conditioners with complex dual-suction and single-row circulation systems.

[0119] In some embodiments, the control unit 104, in adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, adjusts the opening degree of the outdoor throttling device, including: the control unit 104 is further configured to adjust the opening degree of the main throttling device and adjust the opening degree of the auxiliary throttling device. The control unit 104, based on the detection values ​​of the air conditioner's inner pipe temperature sensor and / or the air conditioner's intake temperature sensor before and after adjusting the opening degree of the at least one throttling device, detects at least one of the first fault, the second fault, and the third fault. The detection process for the third fault specifically involves: based on the detection values ​​of the air conditioner's inner pipe temperature sensor and the air conditioner's intake temperature sensor before and after adjusting the opening degrees of the main throttling device, the auxiliary throttling device, and the indoor throttling device, the detection process for the third fault is as follows: The control unit 104 is further configured to, when adjusting the opening of the main throttling device, adjusting the opening of the secondary throttling device, and adjusting the indoor throttling device, record the detection value of the first inner tube temperature sensor before adjusting the opening of the main throttling device as the first temperature of the first inner tube, record the detection value of the first inner tube temperature sensor after adjusting the opening of the main throttling device as the second temperature of the first inner tube, and record the detection value of the first inner tube temperature sensor after adjusting the opening of the secondary throttling device as the third temperature of the first inner tube; and record the detection value of the first inner tube temperature sensor after adjusting the opening of the secondary throttling device as the third temperature of the first inner tube; and to record the detection value of the first inner tube temperature sensor after adjusting the opening of the indoor throttling device. The detection value of the first inner tube temperature sensor after the opening of the flow device is recorded as the fourth temperature of the first inner tube; wherein, the first temperature of the first inner tube is like the temperature before the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH1; the second temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve A, TZH2; the third temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve B, TZH3; and the fourth temperature of the first inner tube is like the temperature after the high-temperature evaporator temperature sensor 51 adjusts the electronic expansion valve C, TZH4. The specific functions and processing of this control unit 104 are further described in step S510.

[0120] Furthermore, the control unit 104 is specifically configured to, when adjusting the opening of the main throttling device and adjusting the indoor throttling device, record the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device as the first temperature of the second inner tube, and record the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device as the fourth temperature of the second inner tube; specifically, record the detection value of the second inner tube temperature sensor before adjusting the opening of the main throttling device as the first temperature of the second inner tube, record the detection value of the second inner tube temperature sensor after adjusting the opening of the main throttling device as the second temperature of the second inner tube, and adjust the secondary throttling device... The detection value of the second inner tube temperature sensor after the opening is adjusted is recorded as the third temperature of the second inner tube; the detection value of the second inner tube temperature sensor after adjusting the opening of the indoor throttling device is recorded as the fourth temperature of the second inner tube; wherein, the first temperature of the second inner tube is like the temperature before the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve A, TZL1; the second temperature of the second inner tube is like the temperature after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve A, TZL2; the third temperature of the second inner tube is like the temperature after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve B, TZL3; and the fourth temperature of the second inner tube is like the temperature after the low-temperature evaporator temperature sensor 52 adjusts the electronic expansion valve C, TZL4. The specific functions and processing of this control unit 104 are further described in step S520.

[0121] Furthermore, the control unit 104 is specifically configured to, when adjusting the indoor throttling device, record the detection value of the first intake temperature sensor before adjusting the indoor throttling device as the first temperature of the first intake port, and record the detection value of the first intake temperature sensor after adjusting the indoor throttling device as the second temperature of the first intake port; record the detection value of the second intake temperature sensor before adjusting the indoor throttling device as the first temperature of the second intake port, and record the detection value of the second intake temperature sensor after adjusting the indoor throttling device as the second temperature of the second intake port; wherein, the first temperature of the first intake port is such as the temperature before the electronic expansion valve C adjusted by the high-temperature intake temperature sensor 32 (TXH1), the second temperature of the first intake port is such as the temperature after the electronic expansion valve C adjusted by the high-temperature intake temperature sensor 32 (TXH2), the first temperature of the second intake port is such as the temperature before the electronic expansion valve C adjusted by the low-temperature intake temperature sensor 31 (TXL1), and the second temperature of the second intake port is such as the temperature after the electronic expansion valve C adjusted by the low-temperature intake temperature sensor 31 (TXL2). For details on the specific functions and processing of the control unit 104, please refer to step S530.

[0122] The control unit 104 is further configured to, when determining that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, and determining that the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0, determine whether the difference between the second temperature of the first air intake and the first temperature of the first air intake is less than 0, and the difference between the second temperature of the second air intake and the first temperature of the second air intake is greater than 0. The specific functions and processing of this control unit 104 are further described in step S540.

[0123] The control unit 104 is further configured to determine that the assembly positions of the first and second inhalation temperature sensors are not abnormal if the condition is satisfied. The specific functions and processing of the control unit 104 are further described in step S550.

[0124] The control unit 104 is further configured to, if it is determined that the assembly position of the first and second inhalation temperature sensors is abnormal, issue a warning message indicating an abnormal assembly position of the first and second inhalation temperature sensors if the condition is not met. The specific functions and processing of this control unit 104 are further described in step S560.

[0125] like ​ As shown, the control logic flow of the air conditioner fault detection device, after step 6, also includes: Step 7: Determine if TXH2-TXH1<0 and TXL2-TXL1>0 are satisfied: If satisfied, the high-temperature intake temperature sensor 32 and the low-temperature intake temperature sensor 31 are confirmed to be correctly assembled, and the test ends. If a fault is detected during the test, the display will output a fault record; if not satisfied, the high-temperature intake temperature sensor 32 and the low-temperature intake temperature sensor 31 are confirmed to be incorrectly assembled, and an abnormal position of the high-temperature intake temperature sensor 32 and the low-temperature intake temperature sensor 31 will be reported and recorded.

[0126] In step 7, similar to step 6, the refrigerant detected by the high-temperature suction sensor 32 flows from the high-temperature evaporator, and the refrigerant detected by the low-temperature suction sensor 31 flows from the low-temperature evaporator. Therefore, it is determined whether the conditions TXH2-TXH1 < 0 and TXL2-TXL1 > 0 are met. If so, i.e., TXH2-TXH1 < 0 and TXL2-TXL1 > 0, then the high-temperature suction sensor 32 and the low-temperature suction sensor 31 are correctly positioned. Otherwise, an abnormal position of the high-temperature suction sensor 32 and the low-temperature suction sensor 31 is reported and recorded. The test ends. If any abnormal data is recorded during the test, the abnormal data is output. After-sales engineers investigate and repair the abnormal data. After repair, testing can continue until no fault data is output. Specifically, the high-temperature evaporator temperature sensing bulb 51 adjusts the temperature before electronic expansion valve A (TZH1), the temperature after electronic expansion valve A (TZH2), the temperature after electronic expansion valve B (TZH3), and the temperature after electronic expansion valve C (TZH4); the low-temperature evaporator temperature sensing bulb 52 adjusts the temperature before electronic expansion valve A (TZL1), the temperature after electronic expansion valve A (TZL2), the temperature after electronic expansion valve B (TZL3), and the temperature after electronic expansion valve C (TZL4); the high-temperature suction temperature sensing bulb 32 adjusts the temperature before electronic expansion valve C (TXH1), the temperature after electronic expansion valve C (TXH2); and the low-temperature suction temperature sensing bulb 31 adjusts the temperature before electronic expansion valve C (TXL1), the temperature after electronic expansion valve C (TXL2). See Table 1 for details.

[0127] In the present invention, the opening degrees of the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the high-temperature evaporator sensing bulb 51 and the low-temperature evaporator sensing bulb 52 to determine whether the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly; the opening degrees of the second electronic expansion valve 12 (i.e., electronic expansion valve B) and the third electronic expansion valve 13 (i.e., electronic expansion valve C) are adjusted, and the temperature difference before and after electronic expansion valve A is adjusted by the high-temperature evaporator sensing bulb 51 and the low-temperature evaporator sensing bulb 52 to determine whether the first electronic expansion valve 11 (i.e., electronic expansion valve A) and the second electronic expansion valve 12 (i.e., electronic expansion valve B) are installed incorrectly. The temperature difference before and after the electronic expansion valve A is adjusted by the temperature sensing bulbs 51 and 52 of the high-temperature evaporator and 52 of the low-temperature evaporator to determine whether the temperature sensing bulbs 51, 52, 32, and 31 of the high-temperature suction valve are installed incorrectly. This invention solves the problem of insufficient system performance, low efficiency, and difficulty in after-sales troubleshooting caused by incorrect installation of multiple electronic expansion valves and temperature sensing bulbs. It enables rapid identification of after-sales fault points, resolves insufficient system performance and low efficiency, and improves user comfort.

[0128] 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.

[0129] According to an embodiment of the present invention, an air conditioner corresponding to an air conditioner control device is also provided. This air conditioner may include the air conditioner control device described above.

[0130] 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 device, 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.

[0131] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided, including a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0132] Since the processing and functions implemented by the product 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.

[0133] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, the storage medium including a stored program, wherein, when the program is executed, the device where the storage medium is located controls the execution of the steps of the air conditioner control method described above.

[0134] 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.

[0135] 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.

[0136] 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 of an air conditioner, characterized by, The outdoor unit of the air conditioner has a compressor, and an outdoor throttling device with a main throttling device and a secondary throttling device, the compressor has a first suction port and a second suction port, a first suction temperature sensing bulb is arranged at the first suction port, and a second suction temperature sensing bulb is arranged at the second suction port; the indoor unit of the air conditioner has a first indoor heat exchanger, a second indoor heat exchanger, and an indoor throttling device arranged on a pipeline where the second indoor heat exchanger is located, a first inner tube temperature sensing bulb is arranged at the first indoor heat exchanger, and a second inner tube temperature sensing bulb is arranged at the second indoor heat exchanger; the control method of the air conditioner comprises: In the case that the air conditioner enters a detection mode of the air conditioner, the opening degree of the main throttling device is controlled to be a first set main opening degree, the opening degree of the secondary throttling device is controlled to be a first set secondary opening degree, and the opening degree of the indoor throttling device is controlled to be a first set indoor opening degree, the fan of the air conditioner is controlled to be turned on, and the compressor is controlled to be turned on and frequency-raised to a first set frequency; wherein the detection mode of the air conditioner is a mode for realizing at least one of the following fault detections of the air conditioner: a first fault, i.e., whether the assembly positions of the main throttling device and the secondary throttling device are abnormal, a second fault, i.e., whether the assembly positions of the first inner tube temperature sensing bulb and the second inner tube temperature sensing bulb are abnormal, and a third fault, i.e., whether the assembly positions of the first suction temperature sensing bulb and the second suction temperature sensing bulb are abnormal; The detection values of the first inner tube temperature sensing bulb and the second inner tube temperature sensing bulb are obtained, which are recorded as the inner tube temperature sensing bulb detection values of the air conditioner; and the detection values of the first suction temperature sensing bulb and the second suction temperature sensing bulb are obtained, which are recorded as the suction temperature sensing bulb detection values of the air conditioner; After a set running time, the opening degree of at least one of the outdoor throttling device and the indoor throttling device is adjusted; According to the inner tube temperature sensing bulb detection values of the air conditioner and / or the suction temperature sensing bulb detection values of the air conditioner before and after the opening degree of the at least one throttling device is adjusted, detection of at least one of the first fault, the second fault, and the third fault is realized.

2. The control method of the air conditioner according to claim 1, characterized by, The adjustment of the opening degree of at least one of the outdoor throttling device and the indoor throttling device comprises: The adjustment of the opening degree of the main throttling device comprises: reducing the opening degree of the main throttling device from the first set main opening degree to a second set main opening degree; After a first set interval time, the opening degree of the main throttling device is restored, and the opening degree of the secondary throttling device is adjusted, which comprises: restoring the opening degree of the main throttling device from the second set main opening degree to the first set main opening degree, and reducing the opening degree of the secondary throttling device from the first set secondary opening degree to a second set secondary opening degree.

3. The control method of the air conditioner according to claim 1 or 2, characterized by, In the adjustment of the opening degree of at least one of the outdoor throttling device and the indoor throttling device, the adjustment of the opening degree of the outdoor throttling device comprises: the adjustment of the opening degree of the main throttling device, and the adjustment of the opening degree of the secondary throttling device; According to the detection values of the inner tube temperature sensor of the air conditioner and / or the suction temperature sensor of the air conditioner before and after adjusting the opening degree of the at least one throttling device, detection of at least one of the first fault, the second fault and the third fault is realized, comprising: In the case of adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device, the detection value of the first inner tube temperature sensor before adjusting the opening degree of the main throttling device is recorded as the first temperature of the first inner tube, the detection value of the first inner tube temperature sensor after adjusting the opening degree of the main throttling device is recorded as the second temperature of the first inner tube, and the detection value of the first inner tube temperature sensor after adjusting the opening degree of the auxiliary throttling device is recorded as the third temperature of the first inner tube; It is determined whether the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube; If it is determined that it is satisfied, it is determined that the assembly position of the main throttling device and the auxiliary throttling device is not abnormal; If it is determined that it is not satisfied, it is determined that the assembly position of the main throttling device and the auxiliary throttling device is abnormal.

4. The control method of the air conditioner according to any one of claims 1 to 3, characterized by, Adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device further comprises: In the case of adjusting the opening degree of the auxiliary throttling device, after the second set interval time, the opening degree of the auxiliary throttling device is restored, and the opening degree of the indoor throttling device is adjusted, comprising: adjusting the opening degree of the auxiliary throttling device from the second set auxiliary opening degree to the first set auxiliary opening degree, and adjusting the opening degree of the indoor throttling device from the first set indoor opening degree to the second set indoor opening degree.

5. The control method of the air conditioner according to any one of claims 1 to 4, characterized by, In the case of adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, the opening degree of the outdoor throttling device is adjusted, comprising: adjusting the opening degree of the main throttling device, and adjusting the opening degree of the auxiliary throttling device; According to the detection values of the inner tube temperature sensor of the air conditioner and / or the suction temperature sensor of the air conditioner before and after adjusting the opening degree of the at least one throttling device, detection of at least one of the first fault, the second fault and the third fault is realized, further comprising: In the case of adjusting the opening degree of the main throttling device, adjusting the opening degree of the auxiliary throttling device, and adjusting the indoor throttling device, the detection value of the first inner tube temperature sensor before adjusting the opening degree of the main throttling device is recorded as the first temperature of the first inner tube, the detection value of the first inner tube temperature sensor after adjusting the opening degree of the main throttling device is recorded as the second temperature of the first inner tube, and the detection value of the first inner tube temperature sensor after adjusting the opening degree of the auxiliary throttling device is recorded as the third temperature of the first inner tube; the detection value of the first inner tube temperature sensor after adjusting the opening degree of the indoor throttling device is recorded as the fourth temperature of the first inner tube; In the case of adjusting the opening degree of the main throttling device and adjusting the indoor throttling device, the detected value of the second inner tube temperature sensing bulb before the opening degree of the main throttling device is adjusted is recorded as the first temperature of the second inner tube, and the detected value of the second inner tube temperature sensing bulb after the opening degree of the indoor throttling device is adjusted is recorded as the fourth temperature of the second inner tube; In the case that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, it is determined whether the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0; If it is determined that the conditions are met, it is determined that the assembly positions of the first inner tube temperature sensing bulb and the second inner tube temperature sensing bulb are normal; If it is determined that the conditions are not met, it is determined that the assembly positions of the first inner tube temperature sensing bulb and the second inner tube temperature sensing bulb are abnormal.

6. The control method of the air conditioner according to any one of claims 1 to 5, characterized by, In the case of adjusting the opening degree of at least one of the outdoor throttling device and the indoor throttling device, the opening degree of the outdoor throttling device is adjusted, including adjusting the opening degree of the main throttling device and adjusting the opening degree of the auxiliary throttling device; According to the detected values of the inner tube temperature sensing bulb of the air conditioner and / or the suction temperature sensing bulb of the air conditioner before and after adjusting the opening degree of the at least one throttling device, the detection of at least one of the first fault, the second fault and the third fault is realized, and further comprising: In the case of adjusting the opening degree of the main throttling device, adjusting the opening degree of the auxiliary throttling device, and adjusting the indoor throttling device, the detected value of the first inner tube temperature sensing bulb before the opening degree of the main throttling device is adjusted is recorded as the first temperature of the first inner tube, the detected value of the first inner tube temperature sensing bulb after the opening degree of the main throttling device is adjusted is recorded as the second temperature of the first inner tube, the detected value of the first inner tube temperature sensing bulb after the opening degree of the auxiliary throttling device is adjusted is recorded as the third temperature of the first inner tube, and the detected value of the first inner tube temperature sensing bulb after the opening degree of the indoor throttling device is adjusted is recorded as the fourth temperature of the first inner tube; In the case of adjusting the opening degree of the main throttling device and adjusting the indoor throttling device, the detected value of the second inner tube temperature sensing bulb before the opening degree of the main throttling device is adjusted is recorded as the first temperature of the second inner tube, and the detected value of the second inner tube temperature sensing bulb after the opening degree of the indoor throttling device is adjusted is recorded as the fourth temperature of the second inner tube; And, in the case of adjusting the indoor throttling device, the detection value of the first suction temperature sensor before the adjustment of the indoor throttling device is recorded as a first temperature of the first suction port, and the detection value of the first suction temperature sensor after the adjustment of the indoor throttling device is recorded as a second temperature of the first suction port; the detection value of the second suction temperature sensor before the adjustment of the indoor throttling device is recorded as a first temperature of the second suction port, and the detection value of the second suction temperature sensor after the adjustment of the indoor throttling device is recorded as a second temperature of the second suction port; In the case where it is determined that the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than 0, and the difference between the second temperature of the first inner tube and the first temperature of the first inner tube is greater than the difference between the third temperature of the first inner tube and the first temperature of the first inner tube, and it is determined that the difference between the first temperature of the first inner tube and the fourth temperature of the first inner tube is greater than 0, and the difference between the first temperature of the second inner tube and the fourth temperature of the second inner tube is less than 0, it is determined whether the second temperature of the first suction port is less than 0, and the difference between the second temperature of the second suction port and the first temperature of the second suction port is greater than 0; If it is determined that it is satisfied, it is determined that the assembly positions of the first suction temperature sensor and the second suction temperature sensor are not abnormal; If it is determined that it is not satisfied, it is determined that the assembly positions of the first suction temperature sensor and the second suction temperature sensor are abnormal.

7. A control device of an air conditioner, characterized by comprising: The outdoor unit of the air conditioner has a compressor, and an outdoor throttling device having a main throttling device and a secondary throttling device, the compressor has a first suction port and a second suction port, a first suction temperature sensor is arranged at the first suction port, and a second suction temperature sensor is arranged at the second suction port; the indoor unit of the air conditioner has a first indoor heat exchanger, a second indoor heat exchanger, and an indoor throttling device arranged on the pipeline where the second indoor heat exchanger is located, a first inner tube temperature sensor is arranged at the first indoor heat exchanger, and a second inner tube temperature sensor is arranged at the second indoor heat exchanger; the control device of the air conditioner comprises: The control unit is configured to, in the case where the air conditioner enters a detection mode of the air conditioner, control the opening degree of the main throttling device to be a first set main opening degree, the opening degree of the secondary throttling device to be a first set secondary opening degree, and the opening degree of the indoor throttling device to be a first set indoor opening degree, control the fan of the air conditioner to be turned on, and control the compressor to be turned on and frequency-raised to a first set frequency; wherein the detection mode of the air conditioner is a mode for realizing at least one of the following fault detections of the air conditioner: a first fault, i.e., whether the assembly positions of the main throttling device and the secondary throttling device are abnormal, a second fault, i.e., whether the assembly positions of the first inner tube temperature sensor and the second inner tube temperature sensor are abnormal, and a third fault, i.e., whether the assembly positions of the first suction temperature sensor and the second suction temperature sensor are abnormal. The acquisition unit is configured to acquire the detection value of the first inner tube temperature-sensing bulb and the detection value of the second inner tube temperature-sensing bulb, which are recorded as the inner tube temperature-sensing bulb detection value of the air conditioner; and acquire the detection value of the first suction temperature-sensing bulb and the detection value of the second suction temperature-sensing bulb, which are recorded as the suction temperature-sensing bulb detection value of the air conditioner. The control unit is further configured to adjust the opening degree of at least one of the outdoor throttling device and the indoor throttling device after the running time is set; The control unit is further configured to detect at least one of the first fault, the second fault and the third fault according to the inner tube temperature-sensing bulb detection value of the air conditioner and / or the suction temperature-sensing bulb detection value of the air conditioner before and after the opening degree of the at least one throttling device is adjusted.

8. An air conditioner characterized by comprising: The air conditioner comprises: The control device of the air conditioner according to claim 7.

9. A storage medium, characterized by The storage medium comprises a stored program, wherein the program controls the device where the storage medium is located to execute the control method of the air conditioner according to any one of claims 1 to 6 when the program is executed.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by a processor to implement the steps of the control method of the air conditioner according to any one of claims 1 to 6.

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