A multi-duct air conditioning terminal structure, indoor unit, air conditioning unit and control method

Abstract

This invention discloses a multi-duct air conditioning terminal structure, an indoor unit, an air conditioning unit, and a control method. This structure improves the air conditioning terminal structure, transforming a single-duct air conditioning terminal structure into a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to deliver air according to different user load requirements, achieving fine-tuning of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the refined air volume requirements of different users, and improve the user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning unit technology, specifically to a multi-duct air conditioning terminal structure, indoor unit, air conditioning unit, and control method. Background Technology

[0002] China is the world's largest producer of air conditioners and also the world's largest air conditioner market. With the rapid development of the country, air conditioner products are constantly being upgraded.

[0003] To meet more diverse and complex user needs, air conditioning products have become more varied and specialized. However, most existing air conditioning products are single-duct variable air volume (VAV) systems. A single-duct VAV system consists of single-duct VAV terminal units, air conditioners equipped with inverters, duct systems, and related control systems. During system operation, the air processed by the air conditioner is distributed to each terminal unit via the duct system. The terminal units automatically adjust the airflow according to temperature changes within the controlled temperature zone to adapt to variations in the air conditioning load within that zone.

[0004] The drawback of existing technology is that single-duct cooling capacity regulation cannot achieve precise airflow adjustment and cannot meet the load requirements of different users (including cooling load requirements and heating load requirements). Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a multi-duct air conditioning terminal structure, indoor unit, air conditioning unit and control method to solve the problem that air conditioning units with single ducts cannot achieve precise air volume adjustment and cannot meet the load requirements of different users in related technologies.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] According to a first aspect of the present invention, a multi-duct air conditioning terminal structure is provided, comprising:

[0008] Multiple air ducts are installed indoors, each with a fresh air valve at the air inlet and a supply air valve at the air outlet; a surface cooler and a blower are installed between the air inlet and the air outlet.

[0009] The controller is connected to the fresh air valve, the air supply fan, and the air supply valve in each of the aforementioned air ducts, and is used to control the working status of the fresh air valve, the air supply fan, and the air supply valve according to the operating conditions input by the user.

[0010] Preferably, each of the air ducts is provided with a different number of surface coolers, and the air outlet side of the surface coolers is provided with blowers of different power.

[0011] The power of the blower in each of the aforementioned air ducts is proportional to the number of the surface coolers.

[0012] Preferably, the multiple air ducts are adjacent to each other and share a single air outlet.

[0013] Preferably, the air outlet sections of the multiple air ducts converge into a funnel shape, and the air outlet is located at the end of the funnel-shaped air outlet section.

[0014] Preferably, the air inlet section of each of the air ducts has a different shape, and the air inlet of each of the air ducts is located at the end of the air inlet section and faces a different direction.

[0015] According to a second aspect of the present invention, an indoor unit is provided, comprising:

[0016] The above-mentioned multi-duct air conditioning terminal structure.

[0017] According to a third aspect of the present invention, an air conditioning unit is provided, comprising:

[0018] The outdoor unit and the aforementioned indoor unit;

[0019] The outdoor unit includes an outdoor unit evaporator section and an outdoor unit condenser section that are interconnected.

[0020] The outdoor unit's evaporator section is connected to the surface cooler in each air duct of the indoor unit via the fan coil water inlet pipe and the fan coil water outlet pipe, respectively, for supplying refrigerant to the surface cooler for heat exchange.

[0021] A circulating water pump is installed on the fan coil unit's water inlet pipe and / or water outlet pipe.

[0022] According to a fourth aspect of the present invention, a control method for an air conditioning unit is provided, comprising:

[0023] Obtain user input of operating conditions;

[0024] Based on the user-input operating conditions, the system controls the operating status of the fresh air valve, air supply fan, and air supply valve in different air ducts to adjust the indoor air volume.

[0025] Preferably, the step of controlling the operating status of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the user-input operating conditions to adjust the indoor air volume includes:

[0026] Determine whether the user input condition needs to be valid;

[0027] If the user inputs the operating conditions, the system controls the opening or closing of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the air volume value input by the user, so as to adjust the indoor air volume.

[0028] If the user enters invalid operating conditions, prompt the user to re-enter them.

[0029] Preferably, determining whether the user input condition needs to be valid includes:

[0030] In cooling mode, the user-input target temperature value is higher than the outdoor temperature, and / or,

[0031] In heating mode, the user-input target temperature value is less than the outdoor temperature, and / or,

[0032] The target air volume value entered by the user is less than the minimum air volume value that the unit can provide, and / or

[0033] The target air volume value entered by the user is higher than the maximum air volume value that the unit can provide.

[0034] If any of the above conditions are met, the user input condition is deemed invalid.

[0035] Preferably, if there are two air ducts, the step of controlling the opening or closing of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the air volume value input by the user in the working conditions to adjust the indoor air volume includes:

[0036] If the air volume value entered by the user in the working condition belongs to the first air volume range, then the low-speed air volume mode will be entered, controlling the opening of the fresh air valve, fan and air outlet in the first air duct.

[0037] If the air volume value entered by the user in the working condition belongs to the second air volume range, then the medium air volume mode will be entered, and the fresh air valve, fan and air outlet in the second air duct will be opened.

[0038] If the air volume value entered by the user in the working condition belongs to the third air volume range, then the high-grade high air volume mode will be entered, controlling the opening of the fresh air valve, fan and air outlet in the first air duct, and simultaneously controlling the opening of the fresh air valve, fan and air outlet in the second air duct.

[0039] The ranges of the first air volume interval, the second air volume interval, and the third air volume interval are sequentially from low to high, and are continuous and non-overlapping air volume intervals.

[0040] Preferably, before determining whether the user input condition needs to be valid, the method further includes:

[0041] Obtain the ambient temperature of the outdoor environment where the unit is currently located;

[0042] Calculate the difference between the ambient temperature and the target temperature in the user-input operating conditions;

[0043] Based on the difference and the air volume value in the user-input operating condition, calculate the target heat exchange required to achieve the user-input operating condition.

[0044] Then, after controlling the opening or closing of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the air volume value input by the user to adjust the indoor air volume, it also includes:

[0045] After running for a preset time in the current working mode, read the flow path quality at the circulating water pump, and the inlet and outlet water temperatures of the surface cooler in the air duct with the fresh air valve open;

[0046] Calculate the actual heat exchange under the current operating conditions based on the flow path mass and inlet / outlet water temperature;

[0047] Determine whether the actual heat exchange is within the preset fluctuation range of the target heat exchange. If so, determine that the current working mode meets the user's needs and maintain the current working state unchanged; otherwise, adjust the current working mode until the actual heat exchange is within the preset fluctuation range of the target heat exchange.

[0048] Preferably, adjusting the current operating mode until the actual heat exchange is within the preset fluctuation range of the target heat exchange includes:

[0049] In low-speed, low-volume mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the working mode is switched to medium-speed, medium-volume mode; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the circulating water pump is shut down.

[0050] In the medium-range medium airflow mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to the high-range high airflow mode; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to the low-range low airflow mode.

[0051] In high-speed, high-volume mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the control unit will report an error and remind the user that the set air exchange volume is too high; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to medium-speed, medium-volume mode.

[0052] According to a fifth aspect of the present invention, an air conditioning unit is provided, comprising:

[0053] A processor, and a memory connected to the processor;

[0054] The memory is used to store computer programs;

[0055] The processor is used to call and execute the computer program in the memory to perform the above-described method.

[0056] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0057] By improving the structure of the air conditioning terminal, the single-duct air conditioning terminal structure is changed to a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to deliver air according to different user load requirements, achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the detailed air volume requirements of different users, and improve the user experience.

[0058] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the structure of an air conditioning unit according to an exemplary embodiment;

[0060] Figure 2 This is a flowchart illustrating a control method for an air conditioning unit according to an exemplary embodiment;

[0061] Figure 3 This is a flowchart illustrating a control method for an air conditioning unit according to another exemplary embodiment;

[0062] Figure 4 This is a flowchart illustrating a control method for an air conditioning unit according to another exemplary embodiment. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0064] As described in the background section, the air conditioning units in the related technologies use a single air duct to adjust the cooling capacity, which cannot achieve precise air volume adjustment and cannot meet the load requirements of different users (including cooling load requirements and heating load requirements).

[0065] In order to effectively solve the problems in related technologies, the present invention provides a multi-duct air conditioning terminal structure, an indoor unit, an air conditioning unit and a control method, which are described in detail below.

[0066] Example 1

[0067] Figure 1 This is a schematic diagram illustrating the structure of an air conditioning unit according to an exemplary embodiment. The air conditioning unit includes a multi-duct air conditioning terminal structure, such as... Figure 1 As shown, the structure includes:

[0068] Multiple air ducts 6 are installed indoors, each with a fresh air valve 7 at its air inlet and a supply air valve 8 at its air outlet; a surface cooler 9 and a blower 10 are installed between the air inlet and the air outlet.

[0069] The controller is connected to the fresh air valve 7, the air supply fan 10 and the air supply valve 8 in each of the air ducts 6, and is used to control the working status of the fresh air valve 7, the air supply fan 10 and the air supply valve 8 according to the user input working conditions.

[0070] It should be noted that the technical solution provided in this embodiment is applicable to air conditioning units. Specifically, it is applicable to the indoor unit of an air conditioning unit. The air conditioning unit is preferably recommended for installation in public buildings (public buildings are generally characterized by: higher pedestrian traffic and population density compared to residential buildings; mostly high-ceilinged spaces with complex overall structures; and varying required cooling and heating loads due to different population densities at different times, with significant differences between the maximum and minimum hourly load values). For buildings with special structures that require frequent adjustment of airflow and cooling capacity to meet the requirements of different time periods, the technical solution provided in this embodiment can also be used.

[0071] It is understood that the technical solution provided in this embodiment improves the air conditioning terminal structure, changing the single-duct air conditioning terminal structure to a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to output air according to different user load requirements, achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the fine air volume requirements of different users, and improve the user experience.

[0072] Preferably, each of the air ducts 6 is provided with a different number of surface coolers 9, and the air outlet side of the surface cooler 9 is provided with a blower 10 of different power.

[0073] The power of the blower 10 in each of the air ducts 6 is proportional to the number of surface coolers 9.

[0074] See Figure 1 , Figure 1 The indoor unit is equipped with two air ducts 6. Two surface coolers 9 are installed in the left air duct 6, and one surface cooler 9 is installed in the right air duct 6. In practice, a high-power supply fan 10 can be configured in the left air duct 6, and a low-power supply fan 10 can be configured in the right air duct 6. This configuration ensures different air volumes in different air ducts 6, allowing the unit to control the opening and closing of the fresh air valve 7, supply air valve 8, and supply fan 10 in different air ducts 6 according to user needs.

[0075] Preferably, see Figure 1 Multiple air ducts 6 are adjacent to each other and share a common air outlet.

[0076] Understandably, multiple air ducts 6 are adjacent and share a common air outlet, which facilitates the integrated installation of air ducts 6 and the water circuit installation of the surface cooler 9 within air ducts 6. In addition, sharing a common air outlet allows for control of the airflow volume at that outlet, enabling precise adjustment of the air volume.

[0077] Preferably, the air outlet sections of the multiple air ducts 6 converge into a funnel shape, and the air outlet is located at the end of the funnel-shaped air outlet section.

[0078] Understandably, the funnel-shaped air outlet section facilitates the gathering of fresh air entering the room, increasing the airflow and thus improving the efficiency of airflow utilization.

[0079] Preferably, see Figure 1 Each of the air ducts 6 has a different shape for its air inlet section, and the air inlet of each air duct 6 is located at the end of the air inlet section and faces a different direction.

[0080] Understandably, when multiple air ducts exist, allowing each duct to collect fresh air from different directions can improve air circulation efficiency and save energy. Multi-duct structures can be applied to building structures with complex fresh and return air systems, allowing for the design of different air intake configurations based on user needs.

[0081] In summary, the technical solution provided in this embodiment improves the air conditioning terminal structure, transforming a single-duct air conditioning terminal structure into a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to deliver air according to different user load requirements, achieving fine-grained adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the refined air volume requirements of different users, and improve the user experience.

[0082] Based on this, the cooling capacity can be adjusted by controlling the air volume, which can meet the different cooling load requirements of users at different times.

[0083] Example 2

[0084] An indoor unit according to an exemplary embodiment includes:

[0085] The above-mentioned multi-duct air conditioning terminal structure.

[0086] It is understood that the technical solution provided in this embodiment includes the above-mentioned multi-duct air conditioning terminal structure. The above-mentioned multi-duct air conditioning terminal structure improves the air conditioning terminal structure, changing the single-duct air conditioning terminal structure into a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to output air according to different user load requirements, thereby achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the fine air volume requirements of different users, and improve the user experience.

[0087] Example 3

[0088] Figure 1 This is a schematic diagram of the structure of an air conditioning unit according to an exemplary embodiment, such as... Figure 1 As shown, the air conditioning unit includes:

[0089] The outdoor unit and the aforementioned indoor unit;

[0090] The outdoor unit includes: an outdoor unit evaporator section 1 and an outdoor unit condenser section 2 that are interconnected;

[0091] The outdoor unit evaporator section 1 is connected to the surface cooler 9 in each air duct 6 of the indoor unit through the fan coil water inlet pipe 3 and the fan coil water outlet pipe 4, respectively, for supplying refrigerant to the surface cooler 9 for heat exchange.

[0092] A circulating water pump 5 is installed on the fan coil water inlet pipe 3 and / or the fan coil water outlet pipe 4.

[0093] It is understood that the technical solution provided in this embodiment includes the above-mentioned multi-duct air conditioning terminal structure. The above-mentioned multi-duct air conditioning terminal structure improves the air conditioning terminal structure, changing the single-duct air conditioning terminal structure into a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to output air according to different user load requirements, thereby achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the fine air volume requirements of different users, and improve the user experience.

[0094] Example 4

[0095] Figure 2 This is a flowchart illustrating a control method for an air conditioning unit according to an exemplary embodiment, such as... Figure 2 As shown, the method includes:

[0096] Step S11: Obtain user input of operating conditions;

[0097] Step S12: Based on the user-input working conditions, control the working status of the fresh air valve, air supply fan and air supply valve in different air ducts to adjust the indoor air volume.

[0098] It should be noted that the technical solution provided in this embodiment is applicable to the air conditioning unit of the above embodiment. In specific practice, it is loaded into the controller of the air conditioning unit of the above embodiment to achieve fine adjustment of indoor air volume.

[0099] It is understood that the technical solution provided in this embodiment improves the air conditioning terminal structure, changing the single-duct air conditioning terminal structure to a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to output air according to different user load requirements, achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the fine air volume requirements of different users, and improve the user experience.

[0100] In practice, the user input operating conditions in step S11 can be obtained after the unit has been running for a preset time, such as 120 seconds, the startup process is completed, and the operating conditions are stable.

[0101] In practice, step S12 involves controlling the operating status of the new air conditioning valves, supply fans, and supply air valves in different air ducts according to the user-input operating conditions to adjust the indoor air volume, including:

[0102] Determine whether the user input condition needs to be valid;

[0103] If the user inputs the operating conditions, the system controls the opening or closing of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the air volume value input by the user, so as to adjust the indoor air volume.

[0104] If the user enters invalid operating conditions, prompt the user to re-enter them.

[0105] Understandably, the unit cannot adjust the airflow when the user inputs an invalid operating condition. In this case, the user is prompted to re-enter the condition to avoid erroneous execution caused by invalid operating conditions, which could lead to unit error reports.

[0106] In practice, determining whether user input conditions need to be valid includes:

[0107] In cooling mode, the user-input target temperature value is higher than the outdoor temperature (e.g., the outdoor temperature is 18°C, and the user-input target temperature value is 25°C), and / or,

[0108] In heating mode, the user-inputted target temperature value is lower than the outdoor temperature (e.g., the outdoor temperature is 18°C, and the user-inputted target temperature value is 14°C), and / or,

[0109] The target airflow value entered by the user is less than the minimum airflow value that the unit can provide (for example, the minimum airflow value that the unit can provide is 200, and the target airflow value entered by the user is 100), and / or,

[0110] The target airflow value entered by the user is higher than the maximum airflow value that the unit can provide (for example, the maximum airflow value that the unit can provide is 300, and the target airflow value entered by the user is 400).

[0111] If any of the above conditions are met, the user input condition is deemed invalid.

[0112] It is understandable that if the user-input operating condition is invalid, forcing operation will cause damage to the unit. Therefore, the control method provided in this embodiment determines whether the user-input operating condition needs to be valid before the unit is run, which can ensure the safe and reliable operation of the unit.

[0113] See Figure 1 If there are two air ducts, the step of controlling the opening or closing of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the air volume value M0 input by the user to adjust the indoor air volume includes:

[0114] If the air volume value M0 input by the user in the working condition belongs to the first air volume range (for example, M0∈(Mmin, Ma)), then the low-level low air volume mode is entered, and the fresh air valve, fan and air outlet in the first air duct are controlled to open.

[0115] If the air volume value M0 in the user-input operating condition belongs to the second air volume range (for example, M0∈(M...), then...) a M b If the fan speed is turned on, the system will enter the medium-speed, medium-volume mode, controlling the opening of the fresh air valve, fan, and air outlet in the second air duct.

[0116] If the air volume value M0 in the user-input operating condition belongs to the third air volume range (for example, M0∈(M...), then...) b M max If the airflow is turned on, it will enter the high-speed, high-volume mode, controlling the opening of the fresh air valve, fan, and air outlet in the first air duct, and simultaneously controlling the opening of the fresh air valve, fan, and air outlet in the second air duct.

[0117] The ranges of the first air volume interval, the second air volume interval, and the third air volume interval are sequentially from low to high, and are continuous and non-overlapping air volume intervals.

[0118] It should be noted that in practice, the first air volume range can be set to Mmin~Ma, where Mmin is the minimum air volume delivered by the low-power fan in the right-side duct, which is also the minimum air volume delivered by the system; Ma is the maximum air volume delivered by the low-power fan in the right-side duct. In this setting, both air volume and cooling capacity are at their minimum, meeting user needs under low-load conditions.

[0119] The second airflow range can be set to Ma to Mb, where Mb is the minimum airflow required for the fans in the left and right ducts to operate simultaneously (therefore, when selecting fans, it is necessary to ensure that the operating airflow of the high-power fan in the left duct covers the Ma to Mb range). The purpose of setting this level is to fill the performance gap between the low and high levels and ensure full coverage of airflow in the Mmin to Mmax range.

[0120] The third air volume range can be set from Mb to Mmax, where Mmax is the maximum air volume delivered by the fans in the left and right ducts simultaneously, and is also the maximum air volume of the system. In this range, both air volume and cooling capacity are at their maximum, meeting user needs under high-load conditions.

[0121] It is understood that the technical solution provided in this embodiment can automatically enter different working modes according to the air volume value in the user's input working conditions, ensuring that the user's needs are met, and realizing fine adjustment of indoor air volume according to the user's load requirements.

[0122] In practice, before determining whether the user input condition needs to be valid, the following may also be included:

[0123] Obtain the ambient temperature of the outdoor environment where the unit is currently located;

[0124] Calculate the difference between the ambient temperature and the target temperature in the user-input operating conditions;

[0125] Based on the difference and the airflow value in the user-input operating condition, calculate the target heat exchange required to achieve the user-input operating condition (calculated using the formula Q=C×M×△T, where Q is the heat exchange, C is the specific heat capacity, a property of the heat transfer medium, an objective constant at a specified temperature, which changes with temperature; M is the air mass, calculated by multiplying the airflow value in the user-input operating condition by the air density; △T is the difference between the ambient temperature and the target temperature in the user-input operating condition, a positive value represents an exothermic process, changing from high temperature to low temperature; conversely, a negative value represents an endothermic process).

[0126] Then, after controlling the opening or closing of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the air volume value input by the user to adjust the indoor air volume, it also includes:

[0127] After running for a preset time in the current working mode, read the flow path quality at the circulating water pump, and the inlet and outlet water temperatures of the surface cooler in the air duct with the fresh air valve open;

[0128] Based on the flow path mass and inlet / outlet water temperature, calculate the actual heat exchange under the current operating conditions (calculated using the formula Q=C×M×△T, where Q is the heat exchange, C is the specific heat capacity, a property of the heat transfer medium, an objective constant at a specified temperature, which changes with temperature; M is the flow path mass, obtained through the mass flow meter at the circulating water pump; △T is the temperature difference between the inlet and outlet water of the surface cooler in the air duct with the fresh air valve open, and when there are multiple air ducts with the fresh air valve open, △T is the cumulative value of the multiple air ducts).

[0129] Determine whether the actual heat exchange is within the preset fluctuation range of the target heat exchange. If so, determine that the current working mode meets the user's needs and maintain the current working state unchanged; otherwise, adjust the current working mode until the actual heat exchange is within the preset fluctuation range of the target heat exchange.

[0130] In practice, the preset fluctuation range of the target heat exchanger can be set according to specific operating conditions or user needs. For example, assuming the target heat exchanger is Q0, the preset fluctuation range of the target heat exchanger can be set to (K). min Q0, K max Q0), K min K max These are the preset minimum and maximum heat transfer coefficients, which can be set according to user needs. For example, if the user requires the heat transfer to reach 95% to 110% of the target load value, then K... min K max They are 0.95 and 1.1 respectively.

[0131] The preset duration can be set according to the user's needs, for example, set to 300 seconds.

[0132] In practice, adjusting the current working mode until the actual heat exchange is within the preset fluctuation range of the target heat exchange includes:

[0133] In low-speed, low-volume mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to medium-speed, medium-volume mode (indicating that the actual heat exchange does not meet the user's needs at this time); if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the circulating water pump will be shut down (indicating that the heat exchange exceeds the user's needs at this time and causes energy waste; shutting down the circulating water pump can reduce the heat exchange).

[0134] In the medium-range medium airflow mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to the high-range high airflow mode (indicating that the actual heat exchange does not meet the user's needs at this time); if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to the low-range low airflow mode (indicating that the heat exchange exceeds the user's needs at this time and causes energy waste, so the heat exchange needs to be reduced).

[0135] In high-speed, high-volume mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the control unit will report an error, reminding the user that the set air exchange volume is too high (indicating that the actual heat exchange does not meet the user's needs); if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to medium-speed, medium-volume mode (indicating that the heat exchange exceeds the user's needs and causes energy waste, so the heat exchange needs to be reduced).

[0136] In summary, the technical solution provided in this embodiment meets the load requirements of different users through precise variable air volume control. At the same time, it achieves intelligent control by switching and adjusting between various working modes, thereby satisfying comfort, reducing user operation, and reducing energy waste.

[0137] Example 5

[0138] Figure 3 This is a flowchart illustrating a control method for an air conditioning unit according to another exemplary embodiment, such as... Figure 3 As shown, the method includes:

[0139] Step S21: Start the unit and read the outdoor temperature of the current environment where the unit is located;

[0140] Step S22: After the unit starts for a preset time, such as 120 seconds, obtain the user-input operating conditions;

[0141] Step S23: Enter different working modes according to the air volume range to which the air volume value in the user-input working condition belongs;

[0142] Step S24: After running for a preset time in the current working mode, check whether the current actual heat exchange is within the preset fluctuation range of the target heat exchange. If not, adjust the working mode.

[0143] Step S25: Unit shutdown (first shut down the compressor, water pump and other components, then shut down the blower, then close the blower valve, and finally disconnect the power supply to complete the shutdown).

[0144] It should be noted that the technical solution provided in this embodiment is applicable to... Figure 1 In the air conditioning unit shown, in specific practice, it is loaded into the controller of the air conditioning unit in the above embodiment to achieve fine adjustment of indoor air volume.

[0145] It is understood that the technical solution provided in this embodiment improves the air conditioning terminal structure, changing the single-duct air conditioning terminal structure to a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to output air according to different user load requirements, achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the fine air volume requirements of different users, and improve the user experience.

[0146] Example 6

[0147] Figure 4 This is a flowchart illustrating a control method for an air conditioning unit according to another exemplary embodiment, such as... Figure 4 As shown, the method includes:

[0148] Step S31: Start the unit and read the outdoor temperature of the current environment where the unit is located;

[0149] Step S32: After the unit starts for a preset time, such as 120 seconds, obtain the user-input operating conditions;

[0150] Step S33: Calculate the difference between the ambient temperature and the target temperature in the user-input operating conditions;

[0151] Step S34: Calculate the target heat exchange required to achieve the user-input working condition based on the difference and the air volume value in the user-input working condition.

[0152] Step S35: Determine whether the user input condition needs to be valid;

[0153] Step S36: If the user-inputted operating condition is valid, enter different operating modes based on the air volume value input by the user, including:

[0154] Step S361: If the air volume value in the user-input working condition belongs to the first air volume range, then enter the low-level small air volume mode and control the opening of the fresh air valve, fan and air outlet in the first air duct.

[0155] Step S362: After running for a preset time in the current working mode, read the flow path mass at the circulating water pump and the inlet and outlet water temperatures of the surface cooler in the air duct with the fresh air valve open; calculate the actual heat exchange under the current working condition based on the flow path mass and the inlet and outlet water temperatures.

[0156] Step S363: If the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, switch the working mode to medium-speed medium airflow mode; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, control the circulating water pump to shut down.

[0157] Step S371: If the air volume value entered by the user in the working condition belongs to the second air volume range, then enter the medium air volume mode and control the opening of the fresh air valve, fan and air outlet in the second air duct.

[0158] Step S372: After running for a preset time in the current working mode, read the flow path mass at the circulating water pump and the inlet and outlet water temperatures of the surface cooler in the air duct with the fresh air valve open; calculate the actual heat exchange under the current working condition based on the flow path mass and the inlet and outlet water temperatures.

[0159] Step S373: If the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, switch the working mode to high-speed high-volume mode; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, switch the working mode to low-speed low-volume mode.

[0160] Step S381: If the air volume value entered by the user in the working condition belongs to the third air volume range, then enter the high-grade high air volume mode, control the opening of the fresh air valve, fan and air outlet in the first air duct, and at the same time control the opening of the fresh air valve, fan and air outlet in the second air duct.

[0161] Step S382: After running for a preset time in the current working mode, read the flow path mass at the circulating water pump and the inlet and outlet water temperatures of the surface cooler in the air duct with the fresh air valve open; calculate the actual heat exchange under the current working condition based on the flow path mass and the inlet and outlet water temperatures.

[0162] Step S383: If the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the control unit reports an error and reminds the user that the set air exchange volume is too high; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the working mode is switched to medium-range medium air volume mode.

[0163] It should be noted that the technical solution provided in this embodiment is applicable to... Figure 1 In the air conditioning unit shown, in specific practice, it is loaded into the controller of the air conditioning unit in the above embodiment to achieve fine adjustment of indoor air volume.

[0164] The steps S361 to S363 are executed sequentially; the steps S371 to S373 are executed sequentially; the steps S381 to S383 are executed sequentially; however, S361 to S363, S371 to S373, and S381 to S383 are executed in parallel. Due to space limitations in the drawing, S361 to S363, S371 to S373, and S381 to S383 are shown in... Figure 4 It is not shown in the document.

[0165] It is understood that the technical solution provided in this embodiment improves the air conditioning terminal structure, changing the single-duct air conditioning terminal structure to a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to output air according to different user load requirements, achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the fine air volume requirements of different users, and improve the user experience.

[0166] Example 7

[0167] An air conditioning unit according to an exemplary embodiment includes:

[0168] A processor, and a memory connected to the processor;

[0169] The memory is used to store computer programs;

[0170] The processor is used to call and execute the computer program in the memory to perform the above-described method.

[0171] It is understood that the technical solution provided in this embodiment improves the air conditioning terminal structure, changing the single-duct air conditioning terminal structure to a multi-duct air conditioning terminal structure. This allows the air conditioning unit to control different ducts to output air according to different user load requirements, achieving fine adjustment of indoor air volume. Compared with the single-duct control method, it can respond to user needs more quickly, meet the fine air volume requirements of different users, and improve the user experience.

[0172] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware (such as a processor, controller, etc.). The program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The storage medium can be a memory, magnetic disk, optical disk, etc.

[0173] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A control method for an air conditioning unit, characterized in that, include: The air conditioning unit includes an outdoor unit and an indoor unit; The indoor unit includes a multi-duct air conditioning terminal structure; The multi-duct air conditioning terminal structure includes: Multiple air ducts are installed indoors, each with a fresh air valve at the air inlet and a supply air valve at the air outlet; a surface cooler and a blower are installed between the air inlet and the air outlet. The controller is connected to the fresh air valve, the air supply fan and the air supply valve in each of the aforementioned air ducts, and is used to control the working status of the fresh air valve, the air supply fan and the air supply valve according to the user input working conditions; Each of the aforementioned air ducts is equipped with a different number of surface coolers, and the air outlet side of each surface cooler is equipped with a blower of different power. The power of the blower in each of the aforementioned air ducts is proportional to the number of the aforementioned surface coolers; The outdoor unit includes an evaporator section and a condenser section that are interconnected. The outdoor unit's evaporator section is connected to the surface cooler in each air duct of the indoor unit via the fan coil water inlet pipe and the fan coil water outlet pipe, respectively, for supplying refrigerant to the surface cooler for heat exchange. A circulating water pump is installed on the fan coil water inlet pipe and / or the fan coil water outlet pipe; The control method includes: Obtain the user-input operating conditions and the ambient temperature of the current outdoor environment where the unit is located; Calculate the difference between the ambient temperature and the target temperature in the user-input operating conditions; Based on the difference and the air volume value in the user-input operating condition, calculate the target heat exchange required to achieve the user-input operating condition. Based on the user-input operating conditions, the system controls the opening or closing of fresh air valves, air supply fans, and air supply valves in different air ducts to regulate the indoor air volume. The air ducts are two in number. Based on the air volume value input by the user under the operating conditions, the opening or closing of the fresh air valve, supply fan, and supply air valve in different air ducts is controlled to regulate the indoor air volume, including: If the air volume value entered by the user in the working condition belongs to the first air volume range, then the low-speed air volume mode will be entered, controlling the opening of the fresh air valve, fan and air outlet in the first air duct. If the air volume value entered by the user in the working condition belongs to the second air volume range, then the medium air volume mode will be entered, and the fresh air valve, fan and air outlet in the second air duct will be opened. If the air volume value entered by the user in the working condition belongs to the third air volume range, then the high-grade high air volume mode will be entered, controlling the opening of the fresh air valve, fan and air outlet in the first air duct, and simultaneously controlling the opening of the fresh air valve, fan and air outlet in the second air duct. The ranges of the first air volume interval, the second air volume interval, and the third air volume interval are sequentially from low to high, and are continuous and non-overlapping air volume intervals. After controlling the opening or closing of fresh air valves, supply fans, and supply air valves in different air ducts according to the air volume value input by the user to adjust the indoor air volume, the method further includes: After running for a preset time in the current working mode, read the flow path quality at the circulating water pump, and the inlet and outlet water temperatures of the surface cooler in the air duct with the fresh air valve open; Calculate the actual heat exchange under the current operating conditions based on the flow path mass and inlet / outlet water temperature; Determine whether the actual heat exchange is within the preset fluctuation range of the target heat exchange. If so, determine that the current working mode meets the user's needs and maintain the current working state unchanged; otherwise, adjust the current working mode until the actual heat exchange is within the preset fluctuation range of the target heat exchange. The adjustment of the current working mode until the actual heat exchange is within the preset fluctuation range of the target heat exchange includes: In low-speed, low-volume mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the working mode is switched to medium-speed, medium-volume mode; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the circulating water pump is shut down. In the medium-range medium airflow mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to the high-range high airflow mode; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to the low-range low airflow mode. In high-speed, high-volume mode, if the actual heat exchange is less than the minimum value of the preset fluctuation range of the target heat exchange, the control unit will report an error and remind the user that the set air exchange volume is too high; if the actual heat exchange is greater than the maximum value of the preset fluctuation range of the target heat exchange, the working mode will be switched to medium-speed, medium-volume mode.

2. The method according to claim 1, characterized in that, After obtaining the user-input operating conditions and the ambient temperature of the current outdoor environment where the unit is located, the process includes: Determine whether the user-input working condition is valid; If the user inputs the operating conditions, the system controls the opening or closing of the fresh air valve, air supply fan, and air supply valve in different air ducts according to the air volume value input by the user, so as to adjust the indoor air volume. If the user enters invalid operating conditions, prompt the user to re-enter them.

3. The method according to claim 2, characterized in that, The determination of whether the user input condition is valid includes: In cooling mode, the user-input target temperature value is higher than the outdoor temperature, and / or, In heating mode, the user-input target temperature value is less than the outdoor temperature, and / or, The target air volume value entered by the user is less than the minimum air volume value that the unit can provide, and / or The target air volume value entered by the user is higher than the maximum air volume value that the unit can provide. If any of the above conditions are met, the user input condition is deemed invalid.

4. The method according to claim 1, characterized in that, Also includes: Multiple air ducts are adjacent to each other and share a single air outlet.

5. The method according to claim 4, characterized in that, The air outlets of the multiple air ducts converge into a funnel shape, and the air outlet is located at the end of the funnel-shaped air outlet section.

6. The method according to claim 5, characterized in that, The shape of the air inlet section of each of the aforementioned air ducts is different, and the air inlet of each of the aforementioned air ducts is located at the end of the air inlet section and faces different directions.

7. An air conditioning unit, characterized in that, include: A processor, and a memory connected to the processor; The memory is used to store computer programs; The processor is used to call and execute the computer program in the memory to perform the method according to any one of claims 1 to 6.

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