Air conditioner pipeline anti-oxidation control method and device, air conditioner equipment and storage medium

Abstract

The invention relates to the field of air conditioners, and provides an air conditioner pipeline anti-oxidation control method and device, air conditioner equipment and a storage medium. PMV electronic expansion valve full-open instructions are issued to all the recognized indoor units, and feedback states returned by all the indoor units are received; and on the basis that the feedback states of all the indoor units represent normal opening of the electronic expansion valve, nitrogen charging anti-oxidation operation is controlled to be executed. The defect of air conditioner pipeline welding surface oxidation is overcome, online pipeline access is guaranteed, pipeline breakpoint welding oxidation hidden danger is eliminated, and the working reliability of an air conditioner system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an anti-oxidation control method, device, air conditioner equipment and storage medium for air conditioner pipelines. Background Art

[0002] A multi-connected air conditioner system is usually composed of multiple combined air conditioner outdoor units and several or dozens of air conditioner indoor units with different quantities connected by pipelines. Since the pipelines of the multi-connected air conditioner system are laid relatively long and the rooms are distributed relatively widely, when connecting the pipelines of the air conditioner system, it is necessary to weld the manifold and the connecting pipelines of each air conditioner indoor unit.

[0003] However, when the air in the pipeline is not thoroughly isolated during the welding of the connecting pipe, it will cause oxidation of the welding surface. When the air conditioner system pipeline is evacuated and filled with refrigerant and then operated, the oxide layer falling off in the connecting pipe will be sucked into the compressor along with the circulating refrigerant, causing damage to the compressor of the air conditioner system, affecting the operation reliability of the air conditioner system, and thus leading to compressor damage. Summary of the Invention

[0004] The present invention provides an anti-oxidation control method, device, air conditioner equipment and storage medium for air conditioner pipelines, so as to solve the defect of oxidation of the welding surface of the air conditioner pipeline in the prior art, ensure the passage of the connecting pipeline, eliminate the hidden danger of oxidation at the pipeline break point during welding, and improve the working reliability of the air conditioner system.

[0005] The present invention provides an anti-oxidation control method for air conditioner pipelines, including: identifying indoor units; respectively sending full-open commands for PMV electronic expansion valves to all identified indoor units, and receiving the feedback status returned by each indoor unit; based on the feedback status of all indoor units indicating that the electronic expansion valves are normally opened, controlling the execution of nitrogen filling anti-oxidation operation.

[0006] It should be noted that by accurately identifying the indoor units, it is convenient for precise pairing. Thus, by sending full-open commands for PMV electronic expansion valves, the electronic expansion valves of all indoor units can be centrally controlled, and the real-time feedback of the indoor units can be received to immediately understand the status of the electronic expansion valves of each indoor unit, so as to ensure that all electronic expansion valves are fully opened before nitrogen filling welding, ensure that the multi-connected air conditioner pipeline forms a fully closed conduction loop, completely isolate the welding part in the pipeline from the air, provide an oxygen-free environment for welding, thus eliminating the hidden danger of oxidation at the pipeline break point during welding, preventing oxidation, reducing the subsequent maintenance and replacement costs that may be caused by oxidation, improving the working reliability and stability of the air conditioner system, and reducing the failure rate.

[0007] According to the anti-oxidation control method for air conditioner pipelines provided by the present invention, identifying indoor units includes: establishing a communication connection with the indoor units; based on the established communication connection, identifying the corresponding indoor units.

[0008] It should be noted that by establishing a communication connection to automatically discover and identify the indoor unit, while improving the recognition accuracy, it reduces manual intervention, provides a basis for remotely managing the indoor unit, and improves the flexibility of expanding or updating the indoor unit equipment.

[0009] A method for controlling anti-oxidation of an air-conditioning pipeline according to the present invention, which identifies the corresponding indoor unit, includes: obtaining the device identifier of the indoor unit; based on the device identifier, determining whether the corresponding device identifier exists in the indoor unit data information to verify the identity of the corresponding indoor unit; wherein, the indoor unit data information is previously configured based on the indoor unit to be connected.

[0010] It should be noted that the device identifier is the unique identity identifier of the indoor unit. By comparing the device identifier pre-stored in the indoor unit data information, the identity of the indoor unit can be accurately confirmed, effectively preventing illegal devices from accessing, protecting the safe and stable operation of the system, avoiding potential security risks, and quickly completing the identification process. Especially when managing a large number of indoor units, it can quickly locate and verify the identity, reduce the waiting time, and improve the overall operation efficiency. In addition, the indoor unit data information is pre-configured based on the indoor unit to be connected, so as to be flexibly adjusted according to actual needs. When adding a new indoor unit, its device identifier is entered into the indoor unit data information; when removing or replacing a device, the configuration is modified accordingly, thus facilitating system management and maintenance.

[0011] A method for controlling anti-oxidation of an air-conditioning pipeline according to the present invention, based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, controls the execution of the nitrogen filling anti-oxidation operation, including: based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, controls the filling of nitrogen into the pipeline system; wherein, the pipeline system is used to connect each indoor unit; detects the nitrogen filling status of the area to be welded in the pipeline system, and based on the nitrogen filling status meeting the preset conditions, sends a welding notice for the corresponding area to be welded to perform anti-oxidation welding.

[0012] It should be noted that taking the normal opening of the electronic expansion valve of all indoor units as the precondition for the nitrogen filling anti-oxidation operation ensures the coherence of the entire operation process. Only when the relevant instructions of the indoor unit are successfully executed will the nitrogen filling link be started to avoid premature or inappropriate nitrogen filling operations, making the operation of the entire system orderly. And when the nitrogen filling status meets the preset conditions, by filling nitrogen into the pipeline system connecting the indoor units, the oxygen in the area to be welded can be effectively removed before welding, greatly reducing the possibility of metal oxidation during welding, avoiding welding defects caused by oxidation, and ensuring the welding quality.

[0013] According to an anti-oxidation control method for an air-conditioning pipeline provided by the present invention, detecting the nitrogen filling state of the area to be welded in the pipeline system includes: detecting the nitrogen flow rate in the area to be welded in the pipeline system, and determining that the nitrogen filling state meets the preset conditions based on the nitrogen flow rate conforming to the preset flow rate threshold; and / or, detecting the oxygen concentration in the area to be welded in the pipeline system, and determining that the nitrogen filling state meets the preset conditions based on the oxygen concentration being lower than the preset concentration threshold.

[0014] It should be noted that by detecting two key indicators, namely the nitrogen flow rate and the oxygen concentration, the nitrogen filling state is evaluated from different perspectives; detecting the nitrogen flow rate and ensuring that it conforms to the preset flow rate threshold to ensure that there is sufficient nitrogen continuously flushing the area to be welded, isolating the welded part in the pipeline from the air, providing a stable and low-oxygen environment for welding, and preventing oxidation; monitoring the oxygen concentration and making it lower than the preset concentration threshold directly reflects the degree of oxygen replacement by nitrogen in the area to be welded. Only when the oxygen concentration is low enough can the oxidation reaction of the metal at the high temperature of welding be effectively avoided, ensuring the purity and performance of the welded joint and improving the stability of the welding quality.

[0015] According to an anti-oxidation control method for an air-conditioning pipeline provided by the present invention, after receiving the feedback status returned by each indoor unit, it includes: making a logical judgment based on all the feedback statuses to determine whether all the electronic expansion valves are opened; based on determining that all the electronic expansion valves are opened, sending a confirmation request to each indoor unit respectively, and the confirmation request is used to require the indoor unit to report the status of the electronic expansion valve again; receiving the status of the electronic expansion valve returned by the indoor unit based on the confirmation request; if there is at least one indoor unit that does not return the status of the electronic expansion valve based on the confirmation request, or, if there is at least one indoor unit that returns an abnormal status of the electronic expansion valve based on the confirmation request, it is determined that there is at least one indoor unit whose feedback status indicates an abnormal opening of the electronic expansion valve; otherwise, it is determined that the feedback statuses of all indoor units indicate that the electronic expansion valves are normally opened.

[0016] It should be noted that first, a logical judgment is made based on all the feedback statuses to preliminarily confirm whether all the electronic expansion valves are opened, and by sending a confirmation request again to require the indoor unit to report the status of the electronic expansion valve again for secondary confirmation, so as to avoid feedback errors or abnormal situations, greatly improve the accuracy of judging the execution of the judgment instruction, avoid misjudgment due to inaccurate single feedback, and improve the reliability of the system.

[0017] According to an anti-oxidation control method for an air-conditioning pipeline provided by the present invention, after receiving the feedback status returned by each indoor unit, it further includes: based on the fact that the feedback status of at least one indoor unit indicates an abnormal opening of the electronic expansion valve, sending an alarm message and notifying the corresponding indoor unit to be checked.

[0018] It should be noted that once it is detected that at least one indoor unit feedbacks an abnormal opening of the electronic expansion valve, an alarm message is sent to promptly notify the inspection of the corresponding indoor unit, so as to facilitate quick positioning and handling of the faulty equipment, prevent the system pipeline from forming a fully closed conduction loop due to the abnormal opening of the electronic expansion valve, being unable to completely isolate the air in the area to be welded, and the abnormal opening of the electronic expansion valve is likely to cause the refrigerant flow to get out of control, affecting the refrigeration or heating effect of the indoor unit, and further ensuring the stable operation of the entire air-conditioning system and avoiding the deterioration of problems affecting the operation of the entire system.

[0019] The present invention also provides an anti-oxidation control device for an air-conditioning pipeline, including: an identification module for identifying indoor units; an instruction control module for sending PMV electronic expansion valve fully open instructions to all identified indoor units respectively and receiving the feedback status returned by each indoor unit; a filling control module for controlling the execution of nitrogen filling anti-oxidation operation based on the feedback status of all indoor units indicating that the electronic expansion valves are normally opened.

[0020] It should be noted that the indoor units are accurately identified by the identification module for precise pairing, so that the PMV electronic expansion valve fully open instructions are sent by the instruction control module to centrally control the electronic expansion valves of all indoor units, and the real-time feedback of the indoor units is received to immediately understand the status of the electronic expansion valves of each indoor unit, ensuring that all electronic expansion valves are fully open before nitrogen filling welding, guaranteeing that the multi-connected unit pipeline forms a fully closed conduction loop, completely isolating the welded parts in the pipeline from the air, providing an oxygen-free environment for the nitrogen filling welding of the filling control module, thus eliminating the hidden danger of oxidation at the pipeline break point welding, preventing oxidation, reducing the subsequent maintenance and replacement costs that may be caused by oxidation, improving the working reliability and stability of the air-conditioning system, and reducing the failure rate.

[0021] The present invention also provides an air-conditioning device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the anti-oxidation control method for an air-conditioning pipeline as described in any one of the above are implemented.

[0022] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the anti-oxidation control method for an air-conditioning pipeline as described in any one of the above are implemented. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic flowchart of the anti-oxidation control method for the air-conditioning pipeline provided by the present invention; Figure 2 It is a schematic structural diagram of the anti-oxidation control device for the air-conditioning pipeline provided by the present invention; Figure 3 It is a schematic structural diagram of the air-conditioning equipment provided by the present invention. Specific embodiments

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0026] Figure 1 Describe a schematic flowchart of an anti-oxidation control method for an air-conditioning pipeline of the present invention, and the method includes: S11, identify the indoor unit; S12, send the full-open command of the PMV electronic expansion valve to each identified indoor unit respectively, and receive the feedback status returned by each indoor unit; S13, based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, control the execution of the nitrogen filling anti-oxidation operation.

[0027] It should be noted that the execution subject of this method is the outdoor unit. The step numbers "S1N" in this specification do not represent the sequence of the anti-oxidation control method for the air-conditioning pipeline. The anti-oxidation control method for the air-conditioning pipeline of the present invention will be specifically described below.

[0028] Step S11, identify the indoor unit.

[0029] In this embodiment, identifying the indoor unit includes: establishing a communication connection with the indoor unit; based on the established communication connection, identifying the corresponding indoor unit.

[0030] It should be noted that by establishing a communication connection to automatically discover and identify the indoor unit, while improving the identification accuracy, it reduces manual intervention, provides a basis for remotely managing the indoor unit, and improves the flexibility of expanding or updating the indoor unit equipment. In addition, the communication connection between the outdoor unit and the indoor unit can be established by wireless or wired means.

[0031] Specifically, establishing a communication connection with the indoor unit includes: connecting the indoor unit and the outdoor unit through a physical line. It should be noted that wired connection has strong anti-interference ability and stable and reliable communication. By directly establishing a communication connection between the outdoor unit and the indoor unit through a physical line, the identification process is fast and accurate, avoiding external interference or attacks, and is suitable for scenarios with high security requirements.

[0032] Correspondingly, identifying the corresponding indoor unit includes: the outdoor unit detecting signal or voltage changes on the line to confirm the connection status of the indoor unit; the outdoor unit identifying the corresponding indoor unit according to a preset address code or line allocation.

[0033] In addition, establishing a communication connection with the indoor unit includes: sending a communication signal to the indoor unit; receiving a feedback signal returned by the indoor unit based on the communication signal; establishing a communication connection with the corresponding indoor unit based on the feedback signal. Correspondingly, identifying the corresponding indoor unit includes: obtaining the device identifier of the indoor unit; based on the device identifier, determining whether the corresponding device identifier exists in the indoor unit data information to verify the identity of the corresponding indoor unit; where the indoor unit data information is previously configured based on the indoor unit to be connected.

[0034] It should be noted that the device identifier is the unique identity identifier of the indoor unit. By comparing the device identifier pre-stored in the indoor unit data information, the identity of the indoor unit can be accurately confirmed, effectively preventing illegal devices from accessing, protecting the safe and stable operation of the system, avoiding potential security risks, and quickly completing the identification process. Especially when managing a large number of indoor units, it can quickly locate and verify the identity, reduce waiting time, and improve the overall operation efficiency. In addition, the indoor unit data information is pre-configured based on the indoor unit to be connected for flexible adjustment according to actual needs. When adding a new indoor unit, its device identifier is entered into the indoor unit data information; when removing or replacing a device, the configuration is modified accordingly, thus facilitating system management and maintenance.

[0035] It is worth noting that by verifying the identity of the corresponding indoor unit, the indoor unit with the identity verification passed is retained, effectively preventing illegal devices from accessing. In addition, the device identifier of the indoor unit can be obtained from the feedback signal sent by the indoor unit, or, after establishing a communication connection with the indoor unit, obtained from the indoor unit. No further limitation is made here.

[0036] Furthermore, establishing a communication connection with the corresponding indoor unit based on the feedback signal includes: verifying the validity of the feedback signal; based on the feedback signal passing the validity verification, establishing a communication connection with the indoor unit corresponding to the feedback signal.

[0037] Even further, verifying the validity of the feedback signal includes: verifying whether the feedback signal is complete; and / or, using a pre-shared key or a preset encryption algorithm to verify the integrity and authenticity of the feedback signal.

[0038] It should be added that when verifying whether the feedback signal is complete, it can usually be achieved through checksums, cyclic redundancy checks (CRC), or other error detection codes, which are not further limited herein. Additionally, if the signal is encrypted, the outdoor unit can use a pre-shared key or a preset encryption algorithm to decrypt the signal and verify the encrypted signature to ensure that the information has not been tampered with, thereby ensuring the integrity and authenticity of the feedback signal.

[0039] In an alternative embodiment, before identifying the indoor unit, it includes: powering on the outdoor unit and all indoor units.

[0040] Step S12: Send a full-open command for the PMV electronic expansion valve to each identified indoor unit respectively, and receive the feedback status returned by each indoor unit.

[0041] In this embodiment, after receiving the feedback status returned by each indoor unit, it includes: making a logical judgment based on all the feedback statuses to determine whether all the electronic expansion valves have been opened.

[0042] Specifically, determining whether all the electronic expansion valves have been opened includes: determining whether the feedback status of all indoor units indicates that the electronic expansion valves are normally opened. If so, it is determined that all the electronic expansion valves have been opened.

[0043] In addition, after determining that all the electronic expansion valves have been opened, it includes: based on determining that all the electronic expansion valves have been opened, sending a confirmation request to each indoor unit respectively. The confirmation request is used to require the indoor unit to report the status of the electronic expansion valve again; receiving the status of the electronic expansion valve returned by the indoor unit based on the confirmation request; if there is at least one indoor unit that does not return the status of the electronic expansion valve based on the confirmation request, or, if there is at least one indoor unit that returns an abnormal status of the electronic expansion valve based on the confirmation request, it is determined that there is at least one indoor unit whose feedback status indicates an abnormal opening of the electronic expansion valve; otherwise, it is determined that the feedback status of all indoor units indicates that the electronic expansion valves are normally opened.

[0044] It should be noted that first, a logical judgment is made based on all the feedback statuses to preliminarily confirm whether all the electronic expansion valves are opened, and by sending a confirmation request again to require the indoor unit to report the status of the electronic expansion valve again for secondary confirmation, it can avoid feedback errors or abnormal situations, greatly improve the accuracy of judging the execution of the instruction, avoid misjudgment caused by inaccurate single feedback, and improve the reliability of the system.

[0045] Step S13: Based on the fact that the feedback status of all indoor units indicates that the electronic expansion valves are normally opened, control the execution of the nitrogen filling anti-oxidation operation.

[0046] In this embodiment, based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, the nitrogen filling and anti-oxidation operation is controlled, including: based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, controlling the filling of nitrogen into the pipeline system; wherein, the pipeline system is used to connect each indoor unit; detecting the nitrogen filling status of the area to be welded in the pipeline system, and based on the nitrogen filling status meeting the preset conditions, sending a welding notice for the corresponding area to be welded for anti-oxidation welding.

[0047] It should be noted that taking the normal opening of the electronic expansion valves of all indoor units as the prerequisite for the nitrogen filling and anti-oxidation operation ensures the coherence of the entire operation process. Only when the relevant instructions of the indoor units are successfully executed will the nitrogen filling link be started to avoid premature or inappropriate nitrogen filling operations, making the operation of the entire system orderly. And when the nitrogen filling status meets the preset conditions, by filling nitrogen into the pipeline system connecting the indoor units, the oxygen in the area to be welded can be effectively removed before welding, greatly reducing the possibility of metal oxidation during welding, avoiding welding defects caused by oxidation, and ensuring the welding quality.

[0048] Specifically, detecting the nitrogen filling status of the area to be welded in the pipeline system includes: detecting the nitrogen flow rate in the area to be welded in the pipeline system, and based on the nitrogen flow rate meeting the preset flow rate threshold, determining that the nitrogen filling status meets the preset conditions; and / or, detecting the oxygen concentration in the area to be welded in the pipeline system, and based on the oxygen concentration being lower than the preset concentration threshold, determining that the nitrogen filling status meets the preset conditions.

[0049] It should be noted that by detecting two key indicators, namely the nitrogen flow rate and the oxygen concentration, the nitrogen filling status is evaluated from different perspectives; detecting the nitrogen flow rate and ensuring that it meets the preset flow rate threshold to ensure that there is sufficient nitrogen continuously flushing the area to be welded, isolating the welded part in the pipeline from the air, providing a stable and low-oxygen environment for welding, and preventing oxidation; monitoring the oxygen concentration and making it lower than the preset concentration threshold directly reflects the degree of oxygen replacement by nitrogen in the area to be welded. Only when the oxygen concentration is low enough can the metal be effectively prevented from undergoing oxidation reactions at the high temperature of welding, ensuring the purity and performance of the welded joint and improving the stability of the welding quality.

[0050] It should be added that in order to ensure that nitrogen fully covers the area to be welded to isolate the air in the area to be welded, it is also possible to: set a visual nitrogen discharge port near the welding area and observe the nitrogen discharge situation. If continuous and stable nitrogen flow is seen, it indicates that nitrogen has covered the welding area; and / or, set a nitrogen tent around the welding area or surround the welding area with a nitrogen curtain to ensure that nitrogen fully covers the welding point; and / or, during the welding process, if the surface of the weld remains metallic in luster and no oxidation color (such as blue or black) appears, it indicates that nitrogen has covered the welding area.

[0051] In an optional embodiment, after receiving the feedback status returned by each indoor unit, it further includes: based on the fact that the feedback status of at least one indoor unit indicates that the electronic expansion valve is abnormally opened, sending an alarm message and notifying to check the corresponding indoor unit.

[0052] It should be noted that once it is monitored that at least one indoor unit feedbacks that the electronic expansion valve is abnormally opened, an alarm message is sent to timely notify to check the corresponding indoor unit, so as to facilitate quickly locating and processing the faulty equipment, prevent the system pipeline from being unable to form a fully closed conduction loop due to the abnormal opening of the electronic expansion valve, unable to completely isolate the air in the area to be welded, and the abnormal opening of the electronic expansion valve is likely to cause the refrigerant flow rate to get out of control, affecting the refrigeration or heating effect of the indoor unit, and further ensuring the stable operation of the entire air-conditioning system and avoiding the problem from deteriorating and affecting the operation of the entire system.

[0053] In summary, the embodiment of the present invention accurately identifies the indoor units for accurate pairing, and thus by sending a PMV electronic expansion valve fully open command, centrally controls the electronic expansion valves of all indoor units, and receives the real-time feedback of the indoor units to immediately understand the status of the electronic expansion valves of each indoor unit, so as to ensure that all electronic expansion valves are fully open before nitrogen filling welding, ensure that the multi-connected unit pipeline forms a fully closed conduction loop, completely isolate the welded part in the pipeline from the air, provide an oxygen-free environment for welding, thereby eliminating the hidden danger of oxidation at the pipeline breakpoint welding, preventing oxidation, reducing the subsequent maintenance and replacement costs that may be caused by oxidation, improving the working reliability and stability of the air-conditioning system, and reducing the failure rate.

[0054] The air-conditioning pipeline anti-oxidation control device provided by the present invention is described below, and the air-conditioning pipeline anti-oxidation control device described below can be mutually corresponding and referred to the air-conditioning pipeline anti-oxidation control method described above.

[0055] Figure 2 The structural schematic diagram of an air-conditioning pipeline anti-oxidation control device is shown, and the device includes: An identification module 21, which identifies the indoor unit; An instruction control module 22, which respectively sends a PMV electronic expansion valve fully open command to all the identified indoor units and receives the feedback status returned by each indoor unit; A charging control module 23, which controls the execution of nitrogen filling anti-oxidation operation based on the fact that the feedback status of all indoor units indicates that the electronic expansion valve is normally opened.

[0056] In this embodiment, the identification module 21 includes: a connection establishment unit, which establishes a communication connection with the indoor unit; an identification unit, which identifies the corresponding indoor unit based on the established communication connection.

[0057] Specifically, the connection establishment unit is used to connect the indoor unit and the outdoor unit through a physical line. Correspondingly, the identification unit includes: a detection subunit, where the outdoor unit detects signal or voltage changes on the line to confirm the connection status of the indoor unit; an identification subunit, where the outdoor unit identifies the corresponding indoor unit according to a preset address code or line allocation.

[0058] In addition, the connection establishment unit includes: a signal sending subunit, which sends a communication signal to the indoor unit; a signal receiving subunit, which receives a feedback signal returned by the indoor unit based on the communication signal; a connection establishment subunit, which establishes a communication connection with the corresponding indoor unit based on the feedback signal. Correspondingly, the identification unit further includes: an identification acquisition subunit, which acquires the device identification of the indoor unit; an identity authentication subunit, which determines whether the corresponding device identification exists in the indoor unit data information based on the device identification to verify the identity of the corresponding indoor unit; where the indoor unit data information is previously configured based on the indoor unit to be connected.

[0059] Further, the connection establishment unit further includes: a verification subunit, which verifies the validity of the feedback signal; a connection establishment subunit, which establishes a communication connection with the indoor unit corresponding to the feedback signal based on the feedback signal passing the validity verification.

[0060] Even further, the verification subunit is used to: verify whether the feedback signal is complete; and / or, use a pre-shared key or a preset encryption algorithm to verify the integrity and authenticity of the feedback signal.

[0061] In an alternative embodiment, the device further includes: a power-on module, which powers on the outdoor unit and all indoor units before identifying the indoor unit.

[0062] In an alternative embodiment, the device further includes: a logical judgment module, which makes a logical judgment based on all feedback states after receiving the feedback states returned by each indoor unit to determine whether all electronic expansion valves have been opened.

[0063] Specifically, the logical judgment module is used to: determine whether the feedback states of all indoor units all indicate that the electronic expansion valves are normally opened. If so, it is determined that all electronic expansion valves have been opened.

[0064] In addition, the logic judgment module further includes: a request sending unit, after determining that all electronic expansion valves are opened, based on the determination that all electronic expansion valves are opened, sends a confirmation request to each indoor unit respectively, and the confirmation request is used to require the indoor unit to report the status of the electronic expansion valve again; a status receiving unit, receives the status of the electronic expansion valve returned by the indoor unit based on the confirmation request; a logic judgment unit, if there is at least one indoor unit that does not return the status of the electronic expansion valve based on the confirmation request, or there is at least one indoor unit that returns an abnormal status of the electronic expansion valve based on the confirmation request, then determines that there is at least one indoor unit whose feedback status indicates that the electronic expansion valve is abnormally opened; otherwise, determines that the feedback status of all indoor units indicates that the electronic expansion valve is normally opened.

[0065] The charging control module 23 includes: a charging control unit, based on the fact that the feedback status of all indoor units indicates that the electronic expansion valve is normally opened, controls the charging of nitrogen into the pipeline system; wherein, the pipeline system is used to connect each indoor unit; a detection unit, detects the nitrogen charging status of the area to be welded in the pipeline system; a welding notification unit, based on the fact that the nitrogen charging status meets the preset conditions, sends a welding notification corresponding to the area to be welded for anti-oxidation welding.

[0066] Specifically, the detection unit is used for: detecting the nitrogen flow rate in the area to be welded in the pipeline system, and based on the nitrogen flow rate meeting the preset flow rate threshold, determining that the nitrogen charging status meets the preset conditions; and / or, detecting the oxygen concentration in the area to be welded in the pipeline system, and based on the oxygen concentration being lower than the preset concentration threshold, determining that the nitrogen charging status meets the preset conditions.

[0067] In an alternative embodiment, the device further includes: an alarm module, after receiving the feedback status returned by each indoor unit, based on the fact that the feedback status of at least one indoor unit indicates that the electronic expansion valve is abnormally opened, sends an alarm message and notifies to check the corresponding indoor unit.

[0068] In summary, the embodiment of the present invention accurately identifies the indoor unit through the identification module to facilitate precise pairing, thereby sending the full-open command of the PMV electronic expansion valve through the command control module to centrally control the electronic expansion valves of all indoor units, and receiving the real-time feedback of the indoor unit to immediately understand the status of the electronic expansion valve of each indoor unit, so as to ensure that all electronic expansion valves are fully opened before nitrogen filling welding, ensure that the multi-connected unit pipeline forms a fully closed conduction loop, completely isolate the welded part in the pipeline from the air, provide an oxygen-free environment for the nitrogen filling welding of the charging control module, thereby eliminating the hidden danger of oxidation at the pipeline break point welding, preventing oxidation, reducing the subsequent maintenance and replacement costs that may be caused by oxidation, improving the working reliability and stability of the air-conditioning system, and reducing the failure rate.

[0069] Figure 3 Illustrates a schematic diagram of the physical structure of an air-conditioning device, as Figure 3As shown in the figure, the air conditioning device may include: a processor 310, a communications interface 320, a memory 330, and a communication bus 340. Among them, the processor 310, the communications interface 320, and the memory 330 complete mutual communication through the communication bus 340. The processor 310 can call the logic instructions in the memory 330 to execute the anti-oxidation control method for the air conditioning pipeline. The method includes: identifying the indoor unit; separately sending a full-open instruction for the PMV electronic expansion valve to all the identified indoor units, and receiving the feedback status returned by each indoor unit; based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, controlling the execution of the nitrogen filling anti-oxidation operation.

[0070] In addition, when the logic instructions in the above-mentioned memory 330 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0071] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the anti-oxidation control method for the air conditioning pipeline provided by the above-mentioned various methods. The method includes: identifying the indoor unit; separately sending a full-open instruction for the PMV electronic expansion valve to all the identified indoor units, and receiving the feedback status returned by each indoor unit; based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, controlling the execution of the nitrogen filling anti-oxidation operation.

[0072] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the air-conditioning pipeline anti-oxidation control method provided above. The method includes: identifying the indoor unit; separately sending a full-open instruction for the PMV electronic expansion valve to all identified indoor units, and receiving the feedback status returned by each indoor unit; based on the feedback status of all indoor units indicating that the electronic expansion valve is normally opened, controlling the execution of the nitrogen filling anti-oxidation operation.

[0073] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0074] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0075] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. An anti-oxidation control method for an air-conditioning pipeline, characterized in that, Including: Identifying the indoor units; Sending the fully open commands of the PMV electronic expansion valves to all the identified indoor units respectively, and receiving the feedback status returned by each of the indoor units; Based on the feedback status of all the indoor units indicating that the electronic expansion valves are normally opened, controlling the execution of the nitrogen filling anti-oxidation operation.

2. The anti-oxidation control method for the air-conditioning pipeline according to claim 1, wherein Identifying the indoor units, including: Establishing a communication connection with the indoor units; Based on the established communication connection, identifying the corresponding indoor units.

3. The anti-oxidation control method for an air-conditioning pipeline according to claim 2, wherein Identifying the corresponding indoor units, including: Obtaining the device identifier of the indoor unit; Based on the device identifier, determining whether there is a corresponding device identifier in the indoor unit data information to verify the identity of the corresponding indoor unit; wherein, the indoor unit data information is previously configured based on the indoor units to be connected.

4. The anti-oxidation control method for the air-conditioning pipeline according to claim 1, wherein Based on the feedback status of all the indoor units indicating that the electronic expansion valves are normally opened, controlling the execution of the nitrogen filling anti-oxidation operation, including: Based on the feedback status of all the indoor units indicating that the electronic expansion valves are normally opened, controlling the filling of nitrogen into the pipeline system; wherein, the pipeline system is used to connect each of the indoor units; Detecting the nitrogen filling status of the area to be welded in the pipeline system, and based on the nitrogen filling status meeting the preset conditions, sending a welding notice for the corresponding area to be welded for anti-oxidation welding.

5. The air-conditioning pipeline anti-oxidation control method according to claim 4, characterized in that, Detecting the nitrogen filling status of the area to be welded in the pipeline system, including: Detecting the nitrogen flow rate of the area to be welded in the pipeline system, and based on the nitrogen flow rate meeting the preset flow rate threshold, determining that the nitrogen filling status meets the preset conditions; and / or, Detecting the oxygen concentration of the area to be welded in the pipeline system, and based on the oxygen concentration being lower than the preset concentration threshold, determining that the nitrogen filling status meets the preset conditions.

6. The anti-oxidation control method for the air-conditioning pipeline according to claim 1, characterized in that After receiving the feedback status returned by each of the indoor units, including: Based on all the feedback statuses for logical judgment to determine whether all the electronic expansion valves have been opened; Based on determining that all the electronic expansion valves have been opened, sending a confirmation request to each of the indoor units respectively, and the confirmation request is used to require the indoor unit to report the status of the electronic expansion valve again; Receiving the status of the electronic expansion valve returned by the indoor unit based on the confirmation request; If there is at least one indoor unit that does not return the status of the electronic expansion valve based on the confirmation request, or, there is at least one indoor unit that returns an abnormal status of the electronic expansion valve based on the confirmation request, it is determined that there is at least one indoor unit whose feedback status indicates an abnormal opening of the electronic expansion valve; otherwise, it is determined that the feedback status of all the indoor units indicates that the electronic expansion valves are normally opened.

7. The anti-oxidation control method for the air-conditioning pipeline according to any one of claims 1-6, characterized in that, After receiving the feedback status returned by each of the indoor units, further including: Based on the feedback status of at least one indoor unit indicating an abnormal opening of the electronic expansion valve, sending an alarm message and notifying the inspection of the corresponding indoor unit.

8. An anti-oxidation control device for an air-conditioning pipeline, characterized in that, Including: An identification module for identifying the indoor units; An instruction control module for sending the fully open commands of the PMV electronic expansion valves to all the identified indoor units respectively, and receiving the feedback status returned by each of the indoor units; A filling control module for controlling the execution of the nitrogen filling anti-oxidation operation based on the feedback status of all the indoor units indicating that the electronic expansion valves are normally opened.

9. An air conditioning device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the air-conditioning pipeline anti-oxidation control method according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the air-conditioning pipeline anti-oxidation control method according to any one of claims 1 to 7.

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