Control method, device and dual-duct air conditioning system

Abstract

This application provides a control method, device, and system for a dual-duct air conditioner. The method includes: when the dual-duct air conditioner is in heating mode and receives a single-fan operation command, acquiring the current indoor ambient temperature, set temperature, and evaporator pipe temperature to obtain the current indoor ambient temperature, current set temperature, and current evaporator pipe temperature; when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, waiting until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, controlling the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command, while keeping the other indoor fan running, with the predetermined temperature lower than the current set temperature, thus solving the problem of easy failure when switching between single-fan operation in dual-duct air conditioners in the prior art.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a control method, device, computer program product, and dual-duct air conditioning system for a dual-duct air conditioner. Background Technology

[0002] Dual-duct air conditioners have two fan systems, offering advantages such as large air volume, high cooling / heating output, and rapid temperature rise and fall. However, they also consume relatively more energy during operation. Therefore, current energy-saving solutions involve switching the air conditioner from dual-fan mode to single-fan mode during operation, improving energy efficiency by precisely directing airflow to the user area. However, when operating in heating mode, switching from dual-fan to single-fan operation degrades the evaporator's heat exchange performance, causing drastic fluctuations in refrigerant temperature and pressure, leading to reliability issues such as overload and overcurrent. Summary of the Invention

[0003] The main objective of this application is to provide a control method, device, computer program product, and dual-duct air conditioning system for a dual-duct air conditioner, so as to at least solve the problem of easy failure when switching between single-fan operation and dual-duct air conditioners in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a control method for a dual-duct air conditioner is provided, comprising: when the dual-duct air conditioner is in heating mode and receives a single-fan operation command, acquiring the current indoor ambient temperature, a set temperature, and an evaporator pipe temperature to obtain the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature; when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, waiting until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, controlling the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command, while keeping the other indoor fan running, wherein the predetermined temperature is less than the current set temperature.

[0005] Optionally, when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, waiting until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, and then controlling the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command while keeping the other indoor fan running, includes: when both the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold and less than the second pipe temperature threshold are satisfied, controlling the dual-duct air conditioner to reduce the speed of the target indoor fan corresponding to the single-fan operation command and controlling the air guide plate corresponding to the target indoor fan to be adjusted to the maximum air outlet position, where the maximum air outlet position is the position of the air guide plate when the air outlet is at its maximum; when the target indoor fan runs at the adjusted speed for a first predetermined time, and / or, at all times within a second predetermined time, the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, controlling the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command while keeping the other indoor fan running.

[0006] Optionally, when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, waiting until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, controlling the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keeping the other indoor fan running, further includes: when both the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than or equal to a second pipe temperature threshold are met, reducing the compressor frequency of the dual-duct air conditioner and increasing the opening of the expansion valve of the dual-duct air conditioner until the current evaporator pipe temperature is less than the second pipe temperature threshold.

[0007] Optionally, reducing the compressor frequency of the dual-duct air conditioner and increasing the opening of the expansion valve of the dual-duct air conditioner until the current evaporator pipe temperature is less than the second pipe temperature threshold includes: reducing the compressor frequency of the dual-duct air conditioner to the minimum operating frequency and increasing the opening of the expansion valve of the dual-duct air conditioner to the maximum opening until the current evaporator pipe temperature is less than the second pipe temperature threshold.

[0008] Optionally, after obtaining the current indoor ambient temperature, the set temperature, and the evaporator pipe temperature, and obtaining the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature, the method further includes: when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, controlling the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keeping the other indoor fan running.

[0009] Optionally, after obtaining the current indoor ambient temperature, the set temperature, and the evaporator pipe temperature, and thus obtaining the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature, the method further includes: if the current indoor ambient temperature is less than the current set temperature and the current indoor ambient temperature is less than or equal to a predetermined temperature, the single fan operation command is not executed, so as to maintain the operation of both indoor fans.

[0010] Optionally, the method further includes: when the dual-duct air conditioner is in cooling mode and receives the single fan operation command, controlling the dual-duct air conditioner to shut down the fan corresponding to the single fan operation command, while keeping the other indoor fan running.

[0011] According to another aspect of this application, a control device for a dual-duct air conditioner is provided, comprising: an acquisition unit, configured to acquire the current indoor ambient temperature, a set temperature, and an evaporator pipe temperature when the dual-duct air conditioner is in heating mode and receives a single-fan operation command, thereby obtaining the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature; and a first control unit, configured to, when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, and control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command, while maintaining the operation of the other indoor fan, wherein the predetermined temperature is less than the current set temperature.

[0012] According to another aspect of this application, a computer program product is provided, comprising a computer program that, when executed by a processor, implements any of the methods described.

[0013] According to another aspect of this application, a dual-duct air conditioning system is provided, comprising: a dual-duct air conditioner, one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include methods for performing any one of the methods described.

[0014] Applying the technical solution of this application, in the above-mentioned control method for a dual-duct air conditioner, when a single-fan operation command is received in the heating mode of the dual-duct air conditioner, the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature are first obtained. If the current indoor ambient temperature is greater than the set temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work simultaneously; a single fan can meet the heating demand. However, if the current evaporator pipe temperature is greater than the first pipe temperature threshold, switching to single-fan operation will cause the evaporator heat exchange performance to deteriorate, leading to air conditioner overload and overcurrent. Therefore, the single-fan operation command is executed only after the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold. That is, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single-fan operation command and keep the other indoor fan running, avoiding air conditioner malfunction caused by directly switching to single-fan operation. This solves the problem of easy malfunction when switching to single-fan operation in the prior art for dual-duct air conditioners. Attached Figure Description

[0015] Figure 1 A hardware structure block diagram of a mobile terminal for implementing a dual-duct air conditioning control method is shown in an embodiment of this application.

[0016] Figure 2 A schematic flowchart of a control method for a dual-duct air conditioner according to an embodiment of this application is shown.

[0017] Figure 3 A schematic flowchart of another control method for a dual-duct air conditioner according to an embodiment of this application is shown;

[0018] Figure 4 A structural block diagram of a control device for a dual-duct air conditioner provided according to an embodiment of this application is shown.

[0019] The above figures include the following reference numerals:

[0020] 102. Processor; 104. Memory; 106. Transmission device; 108. Input / output device. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] As described in the background section, existing dual-duct air conditioners are prone to malfunctions when switching to single-fan operation. To address this technical problem, embodiments of this application provide a control method, apparatus, computer program product, and dual-duct air conditioning system for a dual-duct air conditioner.

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a dual-duct air conditioner control method according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0027] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the dual-duct air conditioning control method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0028] This embodiment provides a control method for a dual-duct air conditioner that runs on a mobile terminal, computer terminal, or similar computing device. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0029] Figure 2 This is a flowchart of a control method for a dual-duct air conditioner according to an embodiment of this application. Figure 2 As shown, the method includes the following steps:

[0030] Step S201: When the dual-duct air conditioner is in heating mode and receives a single fan operation command, obtain the current indoor ambient temperature, set temperature and evaporator pipe temperature to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature.

[0031] Step S202: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0032] In the above-mentioned control method for a dual-duct air conditioner, when a single-fan operation command is received in the heating mode of the dual-duct air conditioner, the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature are first obtained. If the current indoor ambient temperature is greater than the set temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work simultaneously; the heating demand can be met by the operation of a single fan. However, if the current evaporator pipe temperature is greater than the first pipe temperature threshold, switching to single-fan operation will cause the evaporator heat exchange performance to deteriorate, leading to air conditioner overload and overcurrent. Therefore, the single-fan operation command is executed only after the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold. That is, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single-fan operation command, while keeping the other indoor fan running. This avoids air conditioner malfunction caused by directly switching to single-fan operation, and solves the problem of easy malfunction when switching to single-fan operation in the prior art.

[0033] To ensure the reliability of the dual-duct air conditioning system, in one optional implementation, step S202 includes:

[0034] Step S2021: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold and less than the second pipe temperature threshold, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single fan operation command and the air guide plate corresponding to the target indoor fan is controlled to be adjusted to the maximum air outlet position. The maximum air outlet position is the position of the air guide plate when the air outlet is at its maximum.

[0035] Step S2022: When the target indoor fan runs at the adjusted speed for a first predetermined time, and / or when the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold at all times within the second predetermined time, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running.

[0036] In the above embodiments, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work simultaneously; a single fan can meet the heating demand. However, if the current evaporator pipe temperature is greater than the first pipe temperature threshold but less than the second pipe temperature threshold, the system temperature and pressure load are high. Directly shutting down one indoor fan would result in poor heat exchange performance, which could easily lead to overshoot in the system's internal temperature and pressure, causing a risk of shutdown. Therefore, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single fan operation command and the air guide plate corresponding to the target indoor fan is adjusted to the maximum air outlet position to improve the evaporator heat exchange efficiency and reduce the evaporator pipe temperature. If the target indoor fan runs at the adjusted speed for a first predetermined time and / or, at all times within the second predetermined time, the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, it indicates that the current evaporator pipe temperature has dropped below the first pipe temperature threshold, and the single fan operation command can be executed, greatly reducing the risk of air conditioner overload and overcurrent, and ensuring the reliability of the dual-duct air conditioner.

[0037] To ensure the reliability of the dual-duct air conditioning system, in one optional implementation, step S202 further includes:

[0038] Step S2023: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than or equal to the second pipe temperature threshold, reduce the compressor frequency of the dual-duct air conditioner and increase the opening of the expansion valve of the dual-duct air conditioner until the current evaporator pipe temperature is less than the second pipe temperature threshold.

[0039] In the above embodiments, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work simultaneously. A single fan can meet the heating demand. However, if the current evaporator pipe temperature is greater than or equal to the second pipe temperature threshold, the system temperature and pressure load are high, and the temperature difference between the evaporator and the incoming air is small, resulting in a low heat transfer coefficient. If the speed of the indoor fan is reduced or one side of the indoor fan is turned off, it will cause the temperature and pressure in the system to overshoot, leading to air conditioner failure and shutdown. Therefore, reducing the compressor frequency of the dual-duct air conditioner and increasing the opening of the expansion valve of the dual-duct air conditioner will first reduce the compressor exhaust temperature and increase the overload protection margin, thereby reducing the evaporator pipe temperature and reducing the risk of air conditioner failure and shutdown. Until the current evaporator pipe temperature is less than the second pipe temperature threshold, the solution of reducing the speed of the indoor fan can be adopted.

[0040] To further improve the stability of air conditioning operation, in one optional implementation, step S2023 includes:

[0041] Step S20231: Reduce the compressor frequency of the dual-duct air conditioner to the minimum operating frequency and increase the opening of the expansion valve of the dual-duct air conditioner to the maximum opening until the current evaporator pipe temperature is less than the second pipe temperature threshold.

[0042] In the above embodiments, the compressor frequency of the dual-duct air conditioner is reduced to the minimum operating frequency and the opening of the expansion valve of the dual-duct air conditioner is increased to the maximum opening, so as to reduce the evaporator tube temperature as soon as possible, avoid air conditioner overload and overcurrent leading to shutdown, and greatly improve the stability of air conditioner operation.

[0043] To save energy, in one optional embodiment, after obtaining the current indoor ambient temperature, the set temperature, and the evaporator tube temperature, the method further includes:

[0044] Step S301: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running.

[0045] In the above embodiments, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work at the same time. The heating demand can be met by the operation of a single fan. If the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, it indicates that the air conditioner load is not high. If the air conditioner is switched to single fan operation, the risk of overload and overcurrent is low. Therefore, the single fan operation command is directly executed, that is, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single fan operation command, and the other indoor fan is kept running to save energy.

[0046] To ensure user comfort, in one optional implementation, after obtaining the current indoor ambient temperature, the set temperature, and the evaporator tube temperature, the method further includes:

[0047] In step S401, if the current indoor ambient temperature is lower than the current set temperature and the current indoor ambient temperature is lower than or equal to the predetermined temperature, the single fan operation command is not executed, so as to keep both indoor fans running.

[0048] In the above implementation, if the current indoor ambient temperature is less than the current set temperature and the current indoor ambient temperature is less than or equal to the predetermined temperature, the single fan operation command will not be executed and the user will be prompted that the current temperature is too low. The current dual fan operation state will be maintained to output heat, ensuring the rate of indoor temperature rise and thus ensuring user comfort.

[0049] To save energy, in one optional implementation, the above method further includes:

[0050] Step S501: When the dual-duct air conditioner is in cooling mode and receives the above-mentioned single fan operation command, control the dual-duct air conditioner to turn off the fan corresponding to the above-mentioned single fan operation command, and keep the other indoor fan running.

[0051] In the above embodiments, since there is no internal temperature and pressure overshoot problem in the cooling mode, the single fan operation command can be executed directly to save energy. In addition, the single fan can be controlled to blow air to a designated area to ensure user comfort.

[0052] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the dual-duct air conditioning control method of this application will be described in detail below with reference to specific embodiments.

[0053] This embodiment relates to a specific control method for a dual-duct air conditioning system, such as... Figure 3 As shown, it includes the following steps:

[0054] When the air conditioner is turned on for heating operation, it detects the indoor ambient temperature T and the evaporator temperature t when it receives a user's command to turn on the single fan.

[0055] ① When T < T0 and T ≤ 16℃, the air conditioner will not execute the single fan operation command and will prompt the user that the current temperature is too low. It will maintain the current dual fan operation state to output heat and ensure the indoor temperature rise rate.

[0056] ② If the temperature T < T0 and T > 16℃ and the evaporator tube temperature t ≤ t1, it is determined that the system load is relatively light at this time, and the system has a large overload protection margin to cope with system fluctuations during mode switching. At this time, after receiving the user's single-fan operation mode command, the air conditioner shuts off the fan on one side of the air outlet in the user's specified direction and closes the air guide plate, only running the fan on the other side to supply air and heat the user;

[0057] ③ If the temperature T < T0 and T > 16℃ and the evaporator tube temperature t1 < t < t2, or T ≥ T0 and t1 < t < t2, it indicates that the system temperature and pressure load are high. Directly shutting down one side of the fan will result in poor heat exchange performance, which may lead to overshoot of internal system temperature and pressure, causing a risk of shutdown. Therefore, after receiving the single-fan operation mode signal, the air guide vane of the designated side to be shut down is set to the smoothest position, and the fan speed is reduced to the silent speed for heat dissipation and runs for 1 minute or continuously for 5 seconds. If the evaporator temperature t ≤ t1, then the fan is shut down and the air guide vane is closed, and the system enters the single-fan operation mode.

[0058] ④ If T > 16℃ and t ≥ t2, it is determined that the system temperature and pressure load are high, and the temperature difference between the evaporator and the air inlet is small, resulting in a low heat transfer coefficient. If the fan speed is reduced or one side of the fan is turned off, it will cause the temperature and pressure in the system to overshoot, leading to the air conditioner failure and shutdown. Therefore, after receiving the user's single fan operation mode signal, the compressor frequency is reduced to the lowest operating frequency and the expansion valve is opened to the maximum opening. The compressor discharge temperature is reduced first and the overload protection margin is increased before the strategy of scheme ③ is executed.

[0059] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0060] This application also provides a control device for a dual-duct air conditioner. It should be noted that the control device for a dual-duct air conditioner in this application can be used to execute the control method for a dual-duct air conditioner provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0061] The control device for a dual-duct air conditioner provided in the embodiments of this application is described below.

[0062] Figure 4 This is a structural block diagram of a control device for a dual-duct air conditioner according to an embodiment of this application. Figure 4 As shown, the device includes:

[0063] The acquisition unit 10 is used to acquire the current indoor ambient temperature, set temperature and evaporator pipe temperature when the dual-duct air conditioner is in heating mode and receives a single fan operation command, so as to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature.

[0064] The first control unit 20 is configured to, when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0065] In the control device of the aforementioned dual-duct air conditioner, when a single-fan operation command is received in the heating mode of the dual-duct air conditioner, the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature are first obtained. If the current indoor ambient temperature is greater than the set temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work simultaneously. The heating demand can be met by the operation of a single fan. However, if the current evaporator pipe temperature is greater than the first pipe temperature threshold, switching to single-fan operation will cause the heat exchange performance of the evaporator to deteriorate, resulting in air conditioner overload and overcurrent. Therefore, the device waits for the current evaporator pipe temperature to be less than or equal to the first pipe temperature threshold before executing the single-fan operation command. That is, it controls the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command and keep the other indoor fan running. This avoids the air conditioner malfunction caused by directly switching to single-fan operation and solves the problem of easy malfunction when switching to single-fan operation in the prior art.

[0066] To ensure the reliability of the dual-duct air conditioning system, in one optional implementation, the first control unit includes:

[0067] The first control module is used to control the dual-duct air conditioner to reduce the speed of the target indoor fan corresponding to the single fan operation command and to control the air guide plate corresponding to the target indoor fan to be adjusted to the maximum air outlet position when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold and less than the second pipe temperature threshold. The maximum air outlet position is the position of the air guide plate when the air outlet is at its maximum.

[0068] The second control module is used to control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command and keep the other indoor fan running when the target indoor fan runs at the adjusted speed for a first predetermined time and / or when the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold at all times within the second predetermined time.

[0069] In the above embodiments, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work simultaneously; a single fan can meet the heating demand. However, if the current evaporator pipe temperature is greater than the first pipe temperature threshold but less than the second pipe temperature threshold, the system temperature and pressure load are high. Directly shutting down one indoor fan would result in poor heat exchange performance, which could easily lead to overshoot in the system's internal temperature and pressure, causing a risk of shutdown. Therefore, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single fan operation command and the air guide plate corresponding to the target indoor fan is adjusted to the maximum air outlet position to improve the evaporator heat exchange efficiency and reduce the evaporator pipe temperature. If the target indoor fan runs at the adjusted speed for a first predetermined time and / or, at all times within the second predetermined time, the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, it indicates that the current evaporator pipe temperature has dropped below the first pipe temperature threshold, and the single fan operation command can be executed, greatly reducing the risk of air conditioner overload and overcurrent, and ensuring the reliability of the dual-duct air conditioner.

[0070] To ensure the reliability of the dual-duct air conditioning system, in one optional implementation, the first control unit further includes:

[0071] The third control module is used to reduce the compressor frequency of the dual-duct air conditioner and increase the opening of the expansion valve of the dual-duct air conditioner when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than or equal to the second pipe temperature threshold, until the current evaporator pipe temperature is less than the second pipe temperature threshold.

[0072] In the above embodiments, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work simultaneously. A single fan can meet the heating demand. However, if the current evaporator pipe temperature is greater than or equal to the second pipe temperature threshold, the system temperature and pressure load are high, and the temperature difference between the evaporator and the incoming air is small, resulting in a low heat transfer coefficient. If the speed of the indoor fan is reduced or one side of the indoor fan is turned off, it will cause the temperature and pressure in the system to overshoot, leading to air conditioner failure and shutdown. Therefore, reducing the compressor frequency of the dual-duct air conditioner and increasing the opening of the expansion valve of the dual-duct air conditioner will first reduce the compressor exhaust temperature and increase the overload protection margin, thereby reducing the evaporator pipe temperature and reducing the risk of air conditioner failure and shutdown. Until the current evaporator pipe temperature is less than the second pipe temperature threshold, the solution of reducing the speed of the indoor fan can be adopted.

[0073] To further improve the stability of air conditioner operation, in one optional implementation, the third control module includes:

[0074] The control submodule is used to reduce the compressor frequency of the dual-duct air conditioner to the minimum operating frequency and increase the opening of the expansion valve of the dual-duct air conditioner to the maximum opening until the current evaporator pipe temperature is less than the second pipe temperature threshold.

[0075] In the above embodiments, the compressor frequency of the dual-duct air conditioner is reduced to the minimum operating frequency and the opening of the expansion valve of the dual-duct air conditioner is increased to the maximum opening, so as to reduce the evaporator tube temperature as soon as possible, avoid air conditioner overload and overcurrent leading to shutdown, and greatly improve the stability of air conditioner operation.

[0076] To save energy, in one optional embodiment, the above-mentioned device further includes:

[0077] The second control unit is used to, after acquiring the current indoor ambient temperature, set temperature and evaporator pipe temperature, and obtaining the current indoor ambient temperature, current set temperature and current evaporator pipe temperature, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command and keep the other indoor fan running when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold.

[0078] In the above embodiments, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work at the same time. The heating demand can be met by the operation of a single fan. If the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, it indicates that the air conditioner load is not high. If the air conditioner is switched to single fan operation, the risk of overload and overcurrent is low. Therefore, the single fan operation command is directly executed, that is, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single fan operation command, and the other indoor fan is kept running to save energy.

[0079] To ensure user comfort, in one optional embodiment, the above-mentioned device further includes:

[0080] The third control unit is used to obtain the current indoor ambient temperature, the set temperature, and the evaporator tube temperature. After obtaining the current indoor ambient temperature, the current set temperature, and the current evaporator tube temperature, if the current indoor ambient temperature is less than the current set temperature and the current indoor ambient temperature is less than or equal to the predetermined temperature, it will not execute the single fan operation command, so as to keep both indoor fans running.

[0081] In the above implementation, if the current indoor ambient temperature is less than the current set temperature and the current indoor ambient temperature is less than or equal to the predetermined temperature, the single fan operation command will not be executed and the user will be prompted that the current temperature is too low. The current dual fan operation state will be maintained to output heat, ensuring the rate of indoor temperature rise and thus ensuring user comfort.

[0082] To save energy, in one optional embodiment, the above-mentioned device further includes:

[0083] The fourth control unit is used to control the dual-duct air conditioner to shut down the fan corresponding to the single fan operation command and keep the other indoor fan running when the dual-duct air conditioner is in cooling mode and receives the single fan operation command.

[0084] In the above embodiments, since there is no internal temperature and pressure overshoot problem in the cooling mode, the single fan operation command can be executed directly to save energy. In addition, the single fan can be controlled to blow air to a designated area to ensure user comfort.

[0085] The control device for the aforementioned dual-duct air conditioner includes a processor and a memory. The acquisition unit and the first control unit, among others, are stored as program units in the memory. The processor executes these program units stored in the memory to achieve the corresponding functions. All of the above modules reside in the same processor; alternatively, the modules may be located in different processors in any combination.

[0086] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters can address the common problem of malfunctions when switching from dual-duct air conditioning to single-fan operation in existing technologies.

[0087] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0088] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the control method for the dual-duct air conditioner.

[0089] Specifically, the control methods for dual-duct air conditioning include:

[0090] Step S201: When the dual-duct air conditioner is in heating mode and receives a single fan operation command, obtain the current indoor ambient temperature, set temperature and evaporator pipe temperature to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature.

[0091] Step S202: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0092] This invention provides a processor for running a program, wherein the program executes the control method for the dual-duct air conditioner.

[0093] Specifically, the control methods for dual-duct air conditioning include:

[0094] Step S201: When the dual-duct air conditioner is in heating mode and receives a single fan operation command, obtain the current indoor ambient temperature, set temperature and evaporator pipe temperature to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature.

[0095] Step S202: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0096] This invention provides a dual-duct air conditioning system, which includes a dual-duct air conditioner, a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0097] Step S201: When the dual-duct air conditioner is in heating mode and receives a single fan operation command, obtain the current indoor ambient temperature, set temperature and evaporator pipe temperature to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature.

[0098] Step S202: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0099] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0100] Step S201: When the dual-duct air conditioner is in heating mode and receives a single fan operation command, obtain the current indoor ambient temperature, set temperature and evaporator pipe temperature to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature.

[0101] Step S202: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0102] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0103] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0104] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0105] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0106] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0107] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0108] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0109] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0110] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0111] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0112] 1) In the control method of the dual-duct air conditioner of this application, when a single fan operation command is received in the heating mode of the dual-duct air conditioner, the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature are first obtained. If the current indoor ambient temperature is greater than the set temperature, it indicates that the current indoor temperature is not low and there is no need for both fans to work at the same time. The heating demand can be met by the operation of a single fan. However, if the current evaporator pipe temperature is greater than the first pipe temperature threshold, switching to single fan operation will cause the heat exchange performance of the evaporator to deteriorate, resulting in air conditioner overload and overcurrent. Therefore, the single fan operation command is executed only after the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold. That is, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single fan operation command and keep the other indoor fan running. This avoids the air conditioner failure caused by directly switching to single fan operation and solves the problem of easy failure when switching to single fan operation in the prior art.

[0113] 2) In the control device of the dual-duct air conditioner of this application, when a single fan operation command is received in the heating mode of the dual-duct air conditioner, the current indoor ambient temperature, the current set temperature, and the current evaporator pipe temperature are first obtained. If the current indoor ambient temperature is greater than the set temperature, it indicates that the current indoor temperature is not low, and it is not necessary for both fans to work at the same time. The heating demand can be met by the operation of a single fan. However, if the current evaporator pipe temperature is greater than the first pipe temperature threshold, switching to single fan operation will cause the heat exchange performance of the evaporator to deteriorate, resulting in air conditioner overload and overcurrent. Therefore, the single fan operation command is executed only after the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold. That is, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single fan operation command and keep the other indoor fan running. This avoids the air conditioner failure caused by directly switching to single fan operation and solves the problem of easy failure when switching to single fan operation in the prior art.

[0114] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method for a dual-duct air conditioner, characterized in that, include: When the dual-duct air conditioner is in heating mode and receives a single fan operation command, the current indoor ambient temperature, set temperature and evaporator pipe temperature are obtained to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature. If the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, then control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, while keeping the other indoor fan running, and the predetermined temperature is less than the current set temperature.

2. The method according to claim 1, characterized in that, When the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, the system waits until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, then controls the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command, while keeping the other indoor fan running, including: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than the first pipe temperature threshold and less than the second pipe temperature threshold, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single fan operation command and the air guide plate corresponding to the target indoor fan is controlled to be adjusted to the maximum air outlet position, where the maximum air outlet position is the position of the air guide plate when the air outlet is at its maximum. When the target indoor fan operates at the adjusted speed for a first predetermined time, and / or when the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold at all times within a second predetermined time, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single fan operation command, while keeping the other indoor fan running.

3. The method according to claim 1, characterized in that, When the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, the system waits until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, then controls the dual-duct air conditioner to shut down the target indoor fan corresponding to the single-fan operation command, while keeping the other indoor fan running. The system further includes: If both the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is greater than or equal to the second pipe temperature threshold, the compressor frequency of the dual-duct air conditioner is reduced and the opening of the expansion valve of the dual-duct air conditioner is increased until the current evaporator pipe temperature is less than the second pipe temperature threshold.

4. The method according to claim 3, characterized in that, Reducing the compressor frequency of the dual-duct air conditioner and increasing the opening of the expansion valve of the dual-duct air conditioner until the current evaporator pipe temperature is lower than the second pipe temperature threshold includes: The compressor frequency of the dual-duct air conditioner is reduced to the minimum operating frequency, and the opening of the expansion valve of the dual-duct air conditioner is increased to the maximum opening, until the current evaporator pipe temperature is less than the second pipe temperature threshold.

5. The method according to any one of claims 1 to 4, characterized in that, After obtaining the current indoor ambient temperature, set temperature, and evaporator tube temperature, the method further includes: If the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single fan operation command, while keeping the other indoor fan running.

6. The method according to any one of claims 1 to 4, characterized in that, After obtaining the current indoor ambient temperature, set temperature, and evaporator tube temperature, the method further includes: If both the current indoor ambient temperature and the current indoor ambient temperature are less than the current set temperature and less than or equal to the predetermined temperature, the single fan operation command will not be executed, so as to keep both indoor fans running.

7. The method according to any one of claims 1 to 4, characterized in that, The method further includes: When the dual-duct air conditioner is in cooling mode and receives the single fan operation command, the dual-duct air conditioner is controlled to shut down the fan corresponding to the single fan operation command, while keeping the other indoor fan running.

8. A control device for a dual-duct air conditioner, characterized in that, include: The acquisition unit is used to acquire the current indoor ambient temperature, set temperature and evaporator pipe temperature when the dual-duct air conditioner is in heating mode and receives a single fan operation command, so as to obtain the current indoor ambient temperature, current set temperature and current evaporator pipe temperature. The first control unit is configured to, when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator pipe temperature is greater than a first pipe temperature threshold, wait until the current evaporator pipe temperature is less than or equal to the first pipe temperature threshold, control the dual-duct air conditioner to shut down the target indoor fan corresponding to the single fan operation command, and keep the other indoor fan running, wherein the predetermined temperature is less than the current set temperature.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 1 to 7.

10. A dual-duct air conditioning system, characterized in that, include: A dual-duct air conditioner, one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including methods for performing any one of claims 1 to 7.

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