Control method and device of double-air-duct air conditioner and double-air-duct air conditioner system

Abstract

The invention provides a control method and device of a double-air-duct air conditioner and a double-air-duct air conditioning system.The method comprises the steps that under the condition that the double-air-duct air conditioner is in a heating mode and receives a single-fan operation instruction, the indoor environment temperature, the set temperature and the evaporator pipe temperature at the current moment are obtained; the current indoor environment temperature, the current set temperature and the current evaporator pipe temperature are obtained; under the condition that the current indoor environment temperature is larger than the preset temperature and the current evaporator pipe temperature is larger than a first pipe temperature threshold value, waiting till the current evaporator pipe temperature is smaller than or equal to the first pipe temperature threshold value, controlling the double-air-duct air conditioner to close a target indoor fan corresponding to the single-fan operation instruction, and keeping the operation of the other indoor fan, the preset temperature is smaller than the current set temperature, and the problem that in the prior art, faults are prone to occurring when a double-air-duct air conditioner switches single-fan operation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method, device, computer program product and dual-duct air conditioning system for a dual-duct air conditioning. Background Art

[0002] Dual-duct air conditioners have two fan systems, so they have the advantages of large air volume, high cooling / heat output, and fast temperature rise and fall, but at the same time, the energy consumption during use is relatively high. Therefore, the current energy-saving solution is: when the air conditioner is running, the air conditioner is switched from dual-fan mode to single-fan mode, and the energy-saving effect of the air conditioner is improved by accurately supplying air to the user area. However, when running in heating mode, switching from dual-fan operation to single-fan operation will deteriorate the heat exchange performance of the evaporator, resulting in drastic fluctuations in the temperature and pressure of the refrigerant in the system, causing reliability problems such as air conditioner overload and overcurrent. Summary of the invention

[0003] The main purpose of the present 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 in the prior art that dual-duct air-conditioners are prone to malfunction when switching to single-fan operation.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a control method for a dual-duct air conditioner is provided, including: when the dual-duct air conditioner is in heating mode and receives a single-fan operation instruction, obtaining the current indoor ambient temperature, set temperature and evaporator tube temperature, and obtaining the current indoor ambient temperature, current set temperature and current evaporator tube temperature; when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator tube temperature is greater than a first tube temperature threshold, waiting until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, controlling the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keeping the other indoor fan running, and 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 tube temperature is greater than a first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, including: when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold and less than the second tube temperature threshold, control the dual-duct air conditioner to reduce the speed of the target indoor fan corresponding to the single-fan operation instruction and control the air guide plate corresponding to the target indoor fan to adjust to the maximum air outlet position, and the maximum air outlet position is the position of the air guide plate when the air outlet is the largest; when the target indoor fan runs at the adjusted speed for a first predetermined time, and / or, when the current evaporator tube temperature is less than or equal to the first tube temperature threshold at all times within a second predetermined time, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running.

[0006] Optionally, when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator tube temperature is greater than a first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, and also include: when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than or equal to the second tube temperature threshold, reduce the compressor frequency of the dual-duct air conditioner and increase the expansion valve opening of the dual-duct air conditioner until the current evaporator tube temperature is less than the second tube temperature threshold.

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

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

[0009] Optionally, after acquiring the current indoor ambient temperature, set temperature and evaporator tube temperature to obtain the current indoor ambient temperature, current set temperature and current evaporator tube temperature, the method further includes: when 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 instruction is not executed to keep the two indoor fans running.

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

[0011] According to another aspect of the present application, a control device for a dual-duct air conditioner is provided, comprising: an acquisition unit, for acquiring the current indoor ambient temperature, set temperature and evaporator tube temperature when the dual-duct air conditioner is in heating mode and receives a single-fan operation instruction, so as to obtain the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature; a first control unit, for waiting until the current evaporator tube temperature is less than or equal to the first tube temperature threshold when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator tube temperature is greater than a first tube temperature threshold, and controlling the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0012] According to another aspect of the present application, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, any one of the methods described above is implemented.

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

[0014] By applying the technical solution of the present application, in the control method of the above-mentioned dual-duct air-conditioner, when a single-fan operation instruction 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 tube temperature are first obtained. The current indoor ambient temperature is greater than the predetermined temperature, indicating that the current indoor temperature is not low, and there is no need for two fans to work at the same time. The operation of a single fan can also meet the heating demand. However, if the current evaporator tube temperature is greater than the first tube temperature threshold, switching to single-fan operation will cause the evaporator heat exchange performance to deteriorate, causing the air conditioner to overload and overcurrent. Therefore, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, and then execute the single-fan operation instruction, that is, control the dual-duct air-conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, so as to avoid direct switching to single-fan operation causing air-conditioning failure, thereby solving the problem of prone to failure when the dual-duct air-conditioner switches to single-fan operation in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A hardware structure block diagram of a mobile terminal for executing a control method for a dual-duct air conditioner provided in an embodiment of the present application is shown;

[0016] Figure 2 A schematic flow chart of a control method for a dual-duct air conditioner provided according to an embodiment of the present application is shown;

[0017] Figure 3 A schematic flow chart of another method for controlling a dual-duct air conditioner according to an embodiment of the present 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 the present application is shown.

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

[0020] 102, processor; 104, memory; 106, transmission device; 108, input and output devices. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] As introduced in the background technology, in the prior art, dual-duct air conditioners are prone to malfunction when switching to single-fan operation. To solve this technical problem, the embodiments of the present application provide a control method, device, computer program product and dual-duct air conditioner system for a dual-duct air conditioner.

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

[0026] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 1 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, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0027] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the control method of the dual duct air conditioner in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The above-mentioned specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as 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] In this embodiment, a control method for a dual-duct air conditioner running on a mobile terminal, a computer terminal or a similar computing device is provided. It should be noted that the steps shown in the flowchart of 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 can be executed in an order different from that shown here.

[0029] Figure 2 1 is a flow chart of a control method of a dual duct air conditioner according to an embodiment of the present application. Figure 2 As shown, the method comprises the following steps:

[0030] Step S201, when the dual-duct air conditioner is in heating mode and receives a single-fan operation instruction, the indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment are obtained to obtain the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature;

[0031] Step S202, when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0032] In the control method of the above-mentioned dual-duct air conditioner, when a single-fan operation instruction 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 tube temperature are first obtained. The current indoor ambient temperature is greater than the predetermined temperature, indicating that the current indoor temperature is not low, and there is no need for two fans to work at the same time. The operation of a single fan can also meet the heating demand. However, if the current evaporator tube temperature is greater than the first tube temperature threshold, switching to single-fan operation will cause the evaporator heat exchange performance to deteriorate, causing air conditioning overload and overcurrent. Therefore, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, and then execute the single-fan operation instruction, that is, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, so as to avoid direct switching to single-fan operation causing air conditioning failure, thereby solving the problem of easy failure of dual-duct air conditioner switching to single-fan operation in the prior art.

[0033] In order to ensure the reliability of the dual-duct air conditioner, in an optional implementation, the above step S202 includes:

[0034] Step S2021, when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold and less than the second tube temperature threshold, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single-fan operation instruction 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 being 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 period, and / or when the current evaporator tube temperature is less than or equal to the first tube temperature threshold at all times within a second predetermined time period, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single fan operation instruction, and keep the other indoor fan running.

[0036] In the above implementation, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and there is no need for two fans to work at the same time. A single fan can also meet the heating demand. However, the current evaporator tube temperature is greater than the first tube temperature threshold and less than the second tube temperature threshold. The system temperature and pressure load are relatively high. Directly shutting down one side of the indoor fan deteriorates the heat exchange performance, which can easily lead to an overshoot of the temperature and pressure inside the system, causing a shutdown risk. Therefore, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single-fan operation instruction and the air guide plate corresponding to the target indoor fan is controlled to be adjusted to the maximum air outlet position to improve the evaporator heat exchange efficiency and reduce the evaporator tube temperature. If the target indoor fan runs at the adjusted speed for the first predetermined time, and / or the current evaporator tube temperature is less than or equal to the first tube temperature threshold at all times within the second predetermined time, it indicates that the current evaporator tube temperature has dropped below the first tube temperature threshold, and the single-fan operation instruction can be executed, which greatly reduces the risk of air conditioning overload and overcurrent, and ensures the reliability of the dual-duct air conditioner.

[0037] In order to ensure the reliability of the dual-duct air conditioner, in an optional implementation, the above step S202 further includes:

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

[0039] In the above implementation, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and there is no need for two fans to work at the same time. A single fan can also meet the heating demand. However, the current evaporator tube temperature is greater than or equal to the second tube temperature threshold, the system temperature and pressure load are high, and the temperature difference between the evaporator and the inlet air is small, and the heat transfer coefficient is small. If the speed of the indoor fan is reduced or the indoor fan on one side is closed, the temperature and pressure in the system will overshoot, causing the air conditioner to fail and shut down. Therefore, the compressor frequency of the dual-duct air conditioner is reduced and the expansion valve opening of the dual-duct air conditioner is increased. The compressor exhaust temperature is first reduced and the overload protection margin is increased to reduce the evaporator tube temperature, thereby reducing the risk of air conditioner failure and shutdown. Until the current evaporator tube temperature is less than the second tube temperature threshold, the solution of reducing the speed of the indoor fan can be adopted.

[0040] In order to further improve the operating stability of the air conditioner, in an optional implementation, the above step S2023 includes:

[0041] Step S20231, reducing the compressor frequency of the dual-duct air conditioner to the minimum operating frequency and increasing the expansion valve opening of the dual-duct air conditioner to the maximum opening until the current evaporator tube temperature is lower than the second tube temperature threshold.

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

[0043] In order to save electric energy, in an optional implementation, after obtaining the indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment, and obtaining the current indoor ambient temperature, the current set temperature and the current 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 tube temperature is less than or equal to the first tube temperature threshold, the dual-duct air conditioner is controlled to turn off the target indoor fan corresponding to the single fan operation instruction, and keep the other indoor fan running.

[0045] In the above implementation, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and there is no need for two fans to work at the same time. A single fan can also meet the heating demand. The current evaporator tube temperature is less than or equal to the first tube temperature threshold, indicating that the load of the air conditioner is not high. If the single fan operation is switched, the risk of air conditioning overload and overcurrent is low. Therefore, the single fan operation instruction is directly executed, that is, the dual-duct air conditioner is controlled to turn off the target indoor fan corresponding to the single fan operation instruction, and keep the other indoor fan running to save energy.

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

[0047] Step S401, when 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 instruction is not executed to keep the two indoor fans running.

[0048] In the above embodiment, 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 instruction is not executed and the user is prompted that the current temperature is low. The current dual fan operation state is maintained to output heat to ensure the indoor temperature rise rate, thereby ensuring user comfort.

[0049] In order to save electric energy, in an optional implementation manner, the method further includes:

[0050] Step S501, when the dual-duct air conditioner is in cooling mode and receives the single-fan operation instruction, the dual-duct air conditioner is controlled to turn off the fan corresponding to the single-fan operation instruction and keep the other indoor fan running.

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

[0052] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the control method of the dual-duct air conditioner of the present application will be described in detail below in combination with specific embodiments.

[0053] This embodiment relates to a specific control method for a dual-duct air conditioner. Figure 3 As shown, the following steps are included:

[0054] The air conditioner is turned on for heating operation. When receiving the user's instruction to start the single fan operation, the indoor ambient temperature T and the evaporator temperature t are detected;

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

[0056] ② Detect T<T0 and T>16℃ and the evaporator tube temperature detection temperature t≤t1, and determine that the load in the system is light at this time, and the system has a large overload protection margin to cope with the system fluctuation impact during the mode switching process. At this time, after the air conditioner receives the user's single-fan operation mode instruction, the air conditioner turns off the air outlet fan on one side of the user's specified direction, closes the air guide plate, and only runs the fan on the other side to supply air and heat the user;

[0057] ③ Detect T<T0 and T>16℃ and the evaporator tube temperature detection temperature t1<t<t2, or T≥T0 and t1<t<t2, and judge that the system temperature and pressure load are high. Directly shutting down the fan on one side will cause poor heat exchange performance, which may easily lead to overshoot of temperature and pressure inside the system, resulting in shutdown risk. Therefore, after receiving the single-fan operation mode signal, the air guide plate on the side to be closed 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 5 seconds continuously to detect the evaporator temperature t≤t1, then shut down the fan and close the air guide plate to enter the single-fan operation mode;

[0058] ④ Detect T>16℃ and t≥t2, and judge that the system temperature and pressure load are high, the temperature difference between the evaporator and the inlet air is small, and the heat transfer coefficient is small. If the fan speed is reduced or the fan on one side is turned off, the temperature and pressure in the system will overshoot, causing the air conditioner to fail and shut down; so after receiving the user's single fan operation mode signal, the compressor is reduced to the lowest operating frequency and the expansion valve is opened to the maximum opening, so as to first reduce the compressor exhaust temperature and increase the overload protection margin, and then execute the plan ③ strategy.

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

[0060] The embodiment of the present application also provides a control device for a dual duct air conditioner. It should be noted that the control device for the dual duct air conditioner in the embodiment of the present application can be used to execute the control method for the dual duct air conditioner provided in the embodiment of the present application. The device is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0061] The following is an introduction to the control device of the dual-duct air conditioner provided in the embodiment of the present application.

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

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

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

[0065] In the control device of the above-mentioned dual-duct air-conditioner, when a single-fan operation instruction 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 tube temperature are first obtained. The current indoor ambient temperature is greater than the predetermined temperature, indicating that the current indoor temperature is not low, and there is no need for two fans to work at the same time. The operation of a single fan can also meet the heating demand. However, if the current evaporator tube temperature is greater than the first tube temperature threshold, switching to single-fan operation will cause the evaporator heat exchange performance to deteriorate, causing air conditioning overload and overcurrent. Therefore, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, and then execute the single-fan operation instruction, that is, control the dual-duct air-conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, so as to avoid direct switching to single-fan operation causing air conditioning failure, thereby solving the problem of dual-duct air-conditioning switching to single-fan operation being prone to failure in the prior art.

[0066] In order to ensure the reliability of the dual-duct air conditioner, in an 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 instruction and control the air guide plate corresponding to the target indoor fan to adjust to the maximum air outlet position when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold and less than the second tube temperature threshold.

[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 instruction and keep the other indoor fan running when the target indoor fan runs at the adjusted speed for a first predetermined time period and / or when the current evaporator tube temperature is less than or equal to the first tube temperature threshold at all times within the second predetermined time period.

[0069] In the above implementation, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and there is no need for two fans to work at the same time. A single fan can also meet the heating demand. However, the current evaporator tube temperature is greater than the first tube temperature threshold and less than the second tube temperature threshold. The system temperature and pressure load are relatively high. Directly shutting down one side of the indoor fan deteriorates the heat exchange performance, which can easily lead to an overshoot of the temperature and pressure inside the system, causing a shutdown risk. Therefore, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single-fan operation instruction and the air guide plate corresponding to the target indoor fan is controlled to be adjusted to the maximum air outlet position to improve the evaporator heat exchange efficiency and reduce the evaporator tube temperature. If the target indoor fan runs at the adjusted speed for the first predetermined time, and / or the current evaporator tube temperature is less than or equal to the first tube temperature threshold at all times within the second predetermined time, it indicates that the current evaporator tube temperature has dropped below the first tube temperature threshold, and the single-fan operation instruction can be executed, which greatly reduces the risk of air conditioning overload and overcurrent, and ensures the reliability of the dual-duct air conditioner.

[0070] In order to ensure the reliability of the dual-duct air conditioner, in an optional implementation manner, 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 expansion valve opening of the dual-duct air conditioner when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than or equal to the second tube temperature threshold, until the current evaporator tube temperature is less than the second tube temperature threshold.

[0072] In the above implementation, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and there is no need for two fans to work at the same time. A single fan can also meet the heating demand. However, the current evaporator tube temperature is greater than or equal to the second tube temperature threshold, the system temperature and pressure load are high, and the temperature difference between the evaporator and the inlet air is small, and the heat transfer coefficient is small. If the speed of the indoor fan is reduced or the indoor fan on one side is closed, the temperature and pressure in the system will overshoot, causing the air conditioner to fail and shut down. Therefore, the compressor frequency of the dual-duct air conditioner is reduced and the expansion valve opening of the dual-duct air conditioner is increased. The compressor exhaust temperature is first reduced and the overload protection margin is increased to reduce the evaporator tube temperature, thereby reducing the risk of air conditioner failure and shutdown. Until the current evaporator tube temperature is less than the second tube temperature threshold, the solution of reducing the speed of the indoor fan can be adopted.

[0073] In order to further improve the operating stability of the air conditioner, in an 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 expansion valve opening of the dual-duct air conditioner to the maximum opening until the current evaporator tube temperature is lower than the second tube temperature threshold.

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

[0076] In order to save electric energy, in an optional implementation manner, the above device further includes:

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

[0078] In the above implementation, if the current indoor ambient temperature is greater than the predetermined temperature, it indicates that the current indoor temperature is not low, and there is no need for two fans to work at the same time. A single fan can also meet the heating demand. The current evaporator tube temperature is less than or equal to the first tube temperature threshold, indicating that the load of the air conditioner is not high. If the single fan operation is switched, the risk of air conditioning overload and overcurrent is low. Therefore, the single fan operation instruction is directly executed, that is, the dual-duct air conditioner is controlled to turn off the target indoor fan corresponding to the single fan operation instruction, and keep the other indoor fan running to save energy.

[0079] In order to ensure user comfort, in an optional implementation, the device further includes:

[0080] The third control unit is used to obtain the current indoor ambient temperature, set temperature and evaporator tube temperature, and after obtaining the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature, when 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, not execute the single fan operation instruction to keep the two indoor fans running.

[0081] In the above embodiment, 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 instruction is not executed and the user is prompted that the current temperature is low. The current dual fan operation state is maintained to output heat to ensure the indoor temperature rise rate, thereby ensuring user comfort.

[0082] In order to save electric energy, in an optional implementation manner, the above 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 instruction and keep the other indoor fan running when the dual-duct air conditioner is in cooling mode and receives the single-fan operation instruction.

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

[0085] The control device of the dual-duct air conditioner includes a processor and a memory. The acquisition unit and the first control unit are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions. The modules are all located in the same processor; or, the modules are located in different processors in any combination.

[0086] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the problem of the dual-duct air conditioner switching to single-fan operation being prone to failure in the prior art can be solved by adjusting kernel parameters.

[0087] The memory may include non-permanent memory in a computer-readable medium, 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] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the control method of the dual-duct air conditioner.

[0089] Specifically, the control method of the dual-duct air conditioner includes:

[0090] Step S201, when the dual-duct air conditioner is in heating mode and receives a single-fan operation instruction, the indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment are obtained to obtain the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature;

[0091] Step S202, when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0092] An embodiment of the present invention provides a processor, and the processor is used to run a program, wherein the control method of the dual-duct air conditioner is executed when the program is run.

[0093] Specifically, the control method of the dual-duct air conditioner includes:

[0094] Step S201, when the dual-duct air conditioner is in heating mode and receives a single-fan operation instruction, the indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment are obtained to obtain the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature;

[0095] Step S202, when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0096] An embodiment of the present invention provides a dual-duct air conditioning system, the dual-duct air conditioning system comprising a dual-duct air conditioner, a processor, a memory, and a program stored in the memory and executable on the processor, wherein the processor implements at least the following steps when executing the program:

[0097] Step S201, when the dual-duct air conditioner is in heating mode and receives a single-fan operation instruction, the indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment are obtained to obtain the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature;

[0098] Step S202, when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0099] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program for initializing 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 instruction, the indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment are obtained to obtain the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature;

[0101] Step S202, when the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, and the predetermined temperature is less than the current set temperature.

[0102] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0103] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0104] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0105] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0106] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions 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] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0109] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules 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 technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0110] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0111] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0112] 1) In the control method of the dual-duct air conditioner of the present application, when a single-fan operation instruction 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 tube temperature are first obtained. The current indoor ambient temperature is greater than the predetermined temperature, indicating that the current indoor temperature is not low, and there is no need for two fans to work at the same time. The operation of a single fan can also meet the heating demand. However, if the current evaporator tube temperature is greater than the first tube temperature threshold, switching to single-fan operation will cause the evaporator heat exchange performance to deteriorate, causing air conditioning overload and overcurrent. Therefore, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, and then execute the single-fan operation instruction, that is, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, so as to avoid direct switching to single-fan operation causing air conditioning failure, thereby solving the problem of dual-duct air conditioning switching to single-fan operation being prone to failure in the prior art.

[0113] 2) In the control device of the dual-duct air conditioner of the present application, when a single-fan operation instruction 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 tube temperature are first obtained. The current indoor ambient temperature is greater than the predetermined temperature, indicating that the current indoor temperature is not low, and there is no need for two fans to work at the same time. The operation of a single fan can also meet the heating demand. However, if the current evaporator tube temperature is greater than the first tube temperature threshold, switching to single-fan operation will cause the evaporator heat exchange performance to deteriorate, causing air conditioning overload and overcurrent. Therefore, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, and then execute the single-fan operation instruction, that is, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, so as to avoid direct switching to single-fan operation causing air conditioning failure, thereby solving the problem of prone to failure when dual-duct air conditioners switch to single-fan operation in the prior art.

[0114] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present 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 indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment are obtained to obtain the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature; When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep 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 tube temperature is greater than a first tube temperature threshold, waiting until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, controlling the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keeping the other indoor fan running, includes: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than the first tube temperature threshold and less than the second tube temperature threshold, the dual-duct air conditioner is controlled to reduce the speed of the target indoor fan corresponding to the single-fan operation instruction 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 largest; When the target indoor fan runs at the adjusted speed for a first predetermined period of time, and / or when the current evaporator tube temperature is less than or equal to the first tube temperature threshold at all moments within a second predetermined period of time, the dual-duct air conditioner is controlled to shut down the target indoor fan corresponding to the single-fan operation instruction, and keep 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 tube temperature is greater than a first tube temperature threshold, waiting until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, controlling the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keeping the other indoor fan running, further comprising: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is greater than or equal to the second tube temperature threshold, the compressor frequency of the dual-duct air conditioner is reduced and the expansion valve opening of the dual-duct air conditioner is increased until the current evaporator tube temperature is less than the second tube 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 expansion valve opening of the dual-duct air conditioner until the current evaporator tube temperature is less than the second tube temperature threshold, including: The compressor frequency of the dual-duct air conditioner is reduced to a minimum operating frequency and the expansion valve opening of the dual-duct air conditioner is increased to a maximum opening until the current evaporator tube temperature is less than the second tube temperature threshold.

5. The method according to any one of claims 1 to 4, characterized in that After obtaining the indoor environment temperature, the set temperature and the evaporator tube temperature at the current moment, and obtaining the current indoor environment temperature, the current set temperature and the current evaporator tube temperature, the method further includes: When the current indoor ambient temperature is greater than the predetermined temperature and the current evaporator tube temperature is less than or equal to the first tube temperature threshold, the dual-duct air conditioner is controlled to turn off the target indoor fan corresponding to the single-fan operation instruction and keep the other indoor fan running.

6. The method according to any one of claims 1 to 4, characterized in that After obtaining the indoor environment temperature, the set temperature and the evaporator tube temperature at the current moment, and obtaining the current indoor environment temperature, the current set temperature and the current evaporator tube temperature, the method further includes: When both 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 instruction is not executed to keep the two indoor fans running.

7. The method according to any one of claims 1 to 4, characterized in that The method further comprises: When the dual-duct air conditioner is in cooling mode and receives the single-fan operation instruction, the dual-duct air conditioner is controlled to turn off the fan corresponding to the single-fan operation instruction and keep the other indoor fan running.

8. A control device for a dual-duct air conditioner, characterized in that: include: an acquisition unit, for acquiring the indoor ambient temperature, the set temperature and the evaporator tube temperature at the current moment when the dual-duct air conditioner is in a heating mode and receives a single-fan operation instruction, and obtaining the current indoor ambient temperature, the current set temperature and the current evaporator tube temperature; A first control unit is used to, when the current indoor ambient temperature is greater than a predetermined temperature and the current evaporator tube temperature is greater than a first tube temperature threshold, wait until the current evaporator tube temperature is less than or equal to the first tube temperature threshold, control the dual-duct air conditioner to turn off the target indoor fan corresponding to the single-fan operation instruction, and keep the other indoor fan running, and 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, the method according to any one of claims 1 to 7 is implemented.

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

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