Air conditioner fresh air control method, air conditioner fresh air system, air conditioner and storage medium

Abstract

The application provides an air conditioner fresh air control method, an air conditioner fresh air system, an air conditioner and a storage medium. The method comprises the following steps: the air conditioner enters a working state; an air quality detection value of each subzone return air outlet is acquired; a ventilation ratio of each subzone return air outlet corresponding return air valve to the exhaust air passage and the air inlet is determined according to a pollution degree interval in which the air quality detection value is located; and the opening degree of the fresh air valve is determined according to the ventilation ratio of all return air valves to the exhaust air passage, so that the exhaust air volume of the exhaust air passage and the air inlet volume of the fresh air valve are in a balanced state. The air conditioner fresh air control method provided by the application can realize rapid air exchange of a room, improve comfort, reduce energy consumption, and balance the air pressure of the air inlet and the air outlet.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to an air conditioning fresh air control method, an air conditioning fresh air system, an air conditioner using the air conditioning fresh air control method, and a computer-readable storage medium using the air conditioning fresh air control method. Background Technology

[0002] An air conditioning fresh air system is a comprehensive air conditioning system that integrates air conditioning cooling / heating with fresh air exchange functions, aiming to provide a comfortable, healthy, and clean indoor air environment. Its core principle is to achieve comprehensive optimization of indoor air quality through a combination of temperature regulation and air replacement. Air is drawn in from outdoors through the fresh air unit, undergoes multi-stage filtration to remove pollutants such as dust, pollen, PM2.5, odors, and bacteria, and the filtered clean fresh air is then introduced into the room.

[0003] However, existing air conditioning fresh air functions only support whole-house fresh air circulation. When there is a large temperature difference between outdoor and indoor air, introducing hot and humid outdoor air in summer causes the indoor temperature to rise, increasing the air conditioning cooling load and energy consumption. In winter, introducing cold and dry outdoor air causes the indoor temperature to drop sharply, requiring heating or air conditioning to work extra hours, increasing energy consumption. Furthermore, excessive fresh air volume results in significant heat loss, noticeable indoor temperature fluctuations, and discomfort. Insufficient fresh air volume leads to inadequate ventilation, causing discomfort to users and significant energy waste.

[0004] In one existing fresh air system, the ventilation control parameters are adjusted based on the air pollution index (API) of each zone. Since the API of each zone represents its own air quality status, the ventilation control strategy is determined according to the zone's air quality status, thus adapting the ventilation strategy to the zone's air quality and improving its rationality. However, this approach only controls the supply of fresh air to each zone based on its API, resulting in a mixture of fresh and polluted air. It does not consider the exhaust of polluted air from each zone to the outside, leading to low exhaust efficiency and poor fresh air performance. Furthermore, this approach does not address the pressure imbalance between indoor and outdoor air caused by the fresh air supply.

[0005] Therefore, there is an urgent need for a more optimized method for controlling fresh air in air conditioning systems. Summary of the Invention

[0006] The primary objective of this invention is to provide an air conditioning fresh air control method that enables rapid room ventilation, improves comfort, reduces energy consumption, and balances air pressure in the intake and exhaust ducts.

[0007] The second objective of this invention is to provide an air conditioning fresh air system that can achieve rapid room ventilation, improve comfort, reduce energy consumption, and balance the air pressure in the intake and exhaust channels.

[0008] The third objective of this invention is to provide an air conditioner that can achieve rapid air exchange in a room, improve comfort, reduce energy consumption, and balance the air pressure in the intake and exhaust ducts.

[0009] The fourth objective of this invention is to provide a computer-readable storage medium that enables rapid room ventilation, improves comfort, reduces energy consumption, and balances air pressure in the intake and exhaust channels.

[0010] To achieve the aforementioned first objective, the air conditioning fresh air control method provided by the present invention includes: the air conditioner entering a working state; acquiring the air quality detection value of each zone's return air inlet; determining the ventilation ratio of the return air valve corresponding to each zone's return air inlet to the exhaust duct and air inlet based on the pollution level range of the air quality detection value; determining the opening degree of the fresh air valve based on the ventilation ratio of all return air valves to the exhaust duct, so that the exhaust volume of the exhaust duct and the intake volume of the fresh air valve are in a balanced state.

[0011] As can be seen from the above scheme, in the air conditioning fresh air control method of the present invention, by detecting the air quality at the return air vents of different areas, the exhaust and return air ratios of the corresponding return air valves can be independently adjusted according to the actual pollution level of each area, realizing differentiated air treatment for each zone. This avoids the problem of difficulty in improving the air quality of local polluted areas under a single air volume control mode, and improves the overall indoor air quality. At the same time, the opening of the fresh air valve is adjusted according to the total exhaust air ratio of each return air valve, so that the exhaust air volume and the fresh air intake volume are matched and balanced in real time. This can prevent indoor negative pressure and backflow of polluted outside air due to excessive exhaust air, and also avoid excessive positive pressure and energy waste caused by excessive fresh air, ensuring stable and comfortable indoor air pressure.

[0012] In a further embodiment, the degree of pollution at each of the zone return air inlets is positively correlated with the ventilation ratio of the corresponding return air valve to the exhaust duct.

[0013] It can be seen that the degree of pollution is positively correlated with the proportion of return air valve to exhaust air duct. The worse the regional air quality and the more serious the pollution, the greater the proportion of air volume exhausted to the outside, which can quickly exhaust the polluted air and improve local pollution in a targeted manner.

[0014] In a further proposed solution, the step of determining the ventilation ratio of the return air valve corresponding to each zone's return air vent to the exhaust duct and air inlet based on the pollution level range of the air quality detection value includes: if the air quality detection value of the current zone's return air vent is in the first pollution level range, the return air valve corresponding to the current zone's return air vent closes the exhaust duct and fully opens the air inlet for ventilation; if the air quality detection value of the current zone's return air vent is in the second pollution level range, for each parameter index value in the air quality detection value that reaches the parameter index value range corresponding to the second pollution level range, the ventilation ratio of the return air valve corresponding to the current zone's return air vent to the exhaust duct is increased by a preset amount, and the ventilation ratio to the air inlet is decreased by a preset amount; if the air quality detection value of the current zone's return air vent is in the third pollution level range, the return air valve corresponding to the current zone's return air vent fully opens the exhaust duct for ventilation and closes the air inlet for ventilation; the lower limit of the second pollution level range is greater than the upper limit of the first pollution level range, and the lower limit of the third pollution level range is greater than the upper limit of the second pollution level range.

[0015] Therefore, dividing indoor air quality into multiple pollution levels and employing differentiated return air valve control strategies for each level allows for tiered treatment of light, moderate, and heavy pollution, resulting in more precise air quality regulation. In the first pollution level range, exhaust ducts are closed, and all return air enters the indoor air conditioning unit, fully recovering cooling or heating energy and avoiding unnecessary energy loss, significantly reducing air conditioning energy consumption while ensuring clean air. In the second pollution level range, the exhaust ratio is increased in stages based on the number of pollutants exceeding the standard; for each additional pollutant exceeding the standard, the exhaust volume is increased, gradually improving the purification effect without excessive exhaust causing energy waste, achieving a dynamic balance between air quality and energy consumption. In the third pollution level range, exhaust ducts are fully open, cutting off the air conditioning return air and directly expelling all polluted air outdoors, preventing polluted air from circulating indoors, rapidly reducing pollutant concentration, and ensuring safe indoor air quality.

[0016] In a further scheme, the step of determining the ventilation ratio of the return air valve corresponding to each zone's return air vent to the exhaust duct and air inlet based on the pollution level range of the air quality detection value also includes: obtaining the indoor temperature of the area where each zone's return air vent is located; if the absolute value of the difference between the indoor temperature of the area where the current zone's return air vent is located and the set temperature is greater than the first preset temperature value, and the air quality detection value is not in the third pollution level range, then the return air valve corresponding to the current zone's return air vent closes the exhaust duct and fully opens the air inlet for ventilation.

[0017] Therefore, when the indoor temperature in a certain area deviates significantly from the set temperature, even if there is a certain degree of air pollution in that area, the exhaust air will be shut off first, and all return air will be introduced into the indoor unit of the air conditioner for temperature regulation. This prioritizes meeting the human body's temperature comfort needs and avoids slow temperature regulation and discomfort caused by excessive exhaust air.

[0018] In a further proposed solution, the step of determining the opening degree of the fresh air valve based on the ventilation ratio of all return air valves ventilating to the exhaust duct includes: determining the opening degree of the fresh air valve based on the sum of the ventilation ratios of all return air valves ventilating to the exhaust duct.

[0019] Therefore, by adjusting the opening of the fresh air valve by the sum of the exhaust ratios of all return air valves, the fresh air intake can follow the changes in the total exhaust volume in real time, ensuring a basic balance between indoor exhaust and intake, avoiding excessive negative or positive pressure in the room, and maintaining stable indoor air pressure.

[0020] In a further proposed solution, after determining the opening degree of the fresh air valve based on the ventilation ratio of all return air valves to the exhaust air duct, the solution also includes: determining the dwell time of the sweeping plate when sweeping the area where the zoned return air inlet is located based on the ventilation ratio of each return air valve to the exhaust air duct.

[0021] Therefore, by linking the dwell time of the air-sweeping plate with the exhaust ratio of each area, the air-sweeping plate stays longer in areas with a large exhaust ratio and heavy pollution, allowing more fresh air to be applied to the polluted area, thus achieving precise matching of exhaust purification and rapidly improving local air quality.

[0022] In a further proposed solution, the physical space is divided into a first zone and a second zone, with the center of the air outlet of the indoor air conditioning unit as the boundary. After determining the opening degree of the fresh air valve based on the ventilation ratio of all return air valves venting to the exhaust duct, the solution further includes: determining the dwell time of the sweeping plate when sweeping the first zone based on the ventilation ratio of all return air valves corresponding to the return air inlets of the first zone venting to the exhaust duct; and / or determining the dwell time of the sweeping plate when sweeping the second zone based on the ventilation ratio of all return air valves corresponding to the return air inlets of the second zone venting to the exhaust duct.

[0023] Therefore, dividing the air conditioner into two zones using the center of the air outlet as the boundary, and independently controlling the corresponding sweeping residence time based on the total exhaust air ratio of each zone, achieves differentiated air supply to the left and right zones. This allows the more polluted side to receive longer directional airflow, making purification more targeted. The higher the exhaust air ratio of a certain zone, the more severe the pollution in that zone, and the longer the sweeping plate stays in that zone. This allows the air conditioner's exhaust air and fresh air to act more concentratedly on the polluted area, quickly diluting pollutants and improving overall air purification efficiency.

[0024] In a further proposed solution, the duration of the sweeping plate's dwell time during sweeping in the first zone is... Obtained from the following formula: The duration of the sweeping plate's stay during sweeping in the second zone. Obtained from the following formula: ;in, This is the sum of the ventilation ratios from the return air valves corresponding to all return air vents in the first zone to the exhaust air duct. This is the sum of the ventilation ratios from the return air valves corresponding to all return air vents in the second zone to the exhaust air duct. This is the sum of the ventilation ratios from the return air valves corresponding to all return air vents in the physical space to the exhaust air ducts. This is the preset total dwell time for the sweeping process.

[0025] Therefore, based on the preset total dwell time for sweeping, the dwell time for sweeping in the first and second zones is proportionally allocated to ensure a stable overall sweeping cycle and a uniform airflow rhythm. This prevents the airflow from becoming too fast or too slow due to changes in the proportion, thus improving the comfort of the user.

[0026] In a further embodiment, the exhaust duct is equipped with an exhaust fan and a first pressure sensor for detecting the exhaust air pressure in the exhaust duct, and the fresh air duct is equipped with a second pressure sensor for detecting the fresh air pressure in the fresh air duct. After determining the opening degree of the fresh air valve based on the ventilation ratio of all return air valves to the exhaust duct, the embodiment further includes: acquiring the exhaust air pressure and the fresh air pressure; and controlling the power of the exhaust fan based on the exhaust air pressure and the fresh air pressure to balance the exhaust air pressure and the fresh air pressure.

[0027] Therefore, by using the first and second pressure sensors to collect exhaust air pressure and fresh air pressure in real time, and adjusting the power of the exhaust fan according to the pressure difference, the error caused by estimating the air volume solely based on the opening of the air valve is avoided, thus ensuring the stability of indoor and outdoor air pressure.

[0028] To achieve the second objective of this invention, the present invention provides an air conditioning fresh air system, including a fresh air duct, a fresh air valve, an exhaust duct, and two or more zoned return air inlets. The fresh air valve is installed in the fresh air duct, and the two or more zoned return air inlets are located in different areas of the physical space where the air conditioning fresh air system is located. Each zoned return air inlet is connected to the exhaust duct and the air inlet of the indoor unit of the air conditioner through a return air valve. The return air valve is used to control the ventilation ratio to the exhaust duct and the air inlet. The controller is used to acquire the air quality detection value of each zoned return air inlet when the air conditioner enters the working state, and determine the ventilation ratio of the return air valve corresponding to each zoned return air inlet to the exhaust duct and the air inlet according to the pollution level range of the air quality detection value. The controller determines the opening degree of the fresh air valve according to the ventilation ratio of all return air valves to the exhaust duct, so that the exhaust volume of the exhaust duct and the intake volume of the fresh air valve are in a balanced state.

[0029] To achieve the third objective of this invention, this invention provides an air conditioner including a processor and a memory, the memory storing a computer program, which, when executed by the processor, implements the steps of the above-described air conditioning fresh air control method.

[0030] To achieve the fourth objective of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a controller, implements the steps of the above-described air conditioning fresh air control method. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an air conditioner using the air conditioning fresh air control method of the present invention.

[0032] Figure 2 This is a circuit diagram of an air conditioner using the air conditioner fresh air control method of the present invention.

[0033] Figure 3 This is a flowchart of an embodiment of the air conditioning fresh air control method of the present invention.

[0034] Figure 4 This is a flowchart illustrating the steps in an embodiment of the air conditioning fresh air control method of the present invention to determine the ventilation ratio of the return air valve corresponding to the return air inlet of each zone to the exhaust air channel and the air inlet based on the pollution level range of the air quality detection value.

[0035] Figure 5 This is a flowchart following the step of determining the opening degree of the fresh air valve based on the ventilation ratio of all return air valves ventilating to the exhaust air duct in an embodiment of the air conditioning fresh air control method of the present invention.

[0036] Figure 6 This is a flowchart following the step of determining the opening degree of the fresh air valve based on the ventilation ratio of all return air valves ventilating to the exhaust air duct in an embodiment of the air conditioning fresh air control method of the present invention.

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0038] Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the invention or its application or use. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0039] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, without excluding the possibility of encompassing other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0041] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0042] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0043] Example of air conditioning fresh air control method: The air conditioning fresh air control method of the present invention is an application program used in air conditioning fresh air systems to control the fresh air intake of these systems. In this embodiment, see... Figure 1 and Figure 2 The air conditioning fresh air system includes an indoor air conditioning unit 1, a fresh air duct 2, a fresh air valve 3, an exhaust duct 4, and two or more zoned return air vents 5. The fresh air valve 3 is installed inside the fresh air duct 2, and the two or more zoned return air vents 5 are located in different areas of the physical space A where the air conditioning fresh air system is located. The number of zoned return air vents 5 can be set as needed; in this embodiment, there are four zoned return air vents 5. Each zoned return air vent 5 is connected to the exhaust duct 4 and the air inlet 1A of the indoor air conditioning unit 1 through a return air valve 6. The return air valve 6 is used to control the ventilation ratio to the exhaust duct 4 and the air inlet 1A.

[0044] Each zone return air vent 5 is equipped with an air quality sensor 7 and a temperature sensor 8. The air quality sensor 7 is used to detect the air quality of the area where each zone return air vent 5 is located, and the temperature sensor 8 is used to detect the indoor temperature of the area where each zone return air vent 5 is located.

[0045] The exhaust duct 4 is equipped with an exhaust fan 12 and a first pressure sensor 10 for detecting the exhaust air pressure of the exhaust duct 4, and the fresh air duct 2 is equipped with a second pressure sensor 11 for detecting the fresh air pressure of the fresh air duct 2.

[0046] An air sweeping plate 9 and a controller 13 are also installed at the air outlet of the indoor unit 1. The air sweeping plate 9 is installed at the air outlet of the indoor unit 1 and is used for air sweeping. The fresh air valve 3, return air valve 6, air quality sensor 7, temperature sensor 8, air sweeping plate 9, first pressure sensor 10, second pressure sensor 11 and exhaust fan 12 are all electrically connected to the controller 13.

[0047] In this embodiment, a heat exchange device 14 is provided at the intersection of the fresh air duct 2 and the exhaust fan 12. The heat exchange device 14 is used to recover and reuse the energy in the exhaust gas, preheat or precool the fresh air, reduce energy consumption and improve user comfort. The heat exchange device 14 can be a known heat exchange device, which will not be described in detail here.

[0048] See Figure 3 In this embodiment, the air conditioning fresh air control method first executes step S1, and the air conditioner enters the working state. When the air conditioner is turned on, it can perform cooling or heating according to the user-set temperature.

[0049] After the air conditioner enters the working state, step S2 is executed to obtain the air quality detection value of each zone's return air vent 5. Based on the pollution level range of the air quality detection value, the ventilation ratio of the return air valve 6 to the exhaust air channel 4 and the air inlet 1A corresponding to each zone's return air vent 5 is determined. The air quality detection value can be obtained through the air quality sensor 7. By detecting the air quality detection values ​​of each area, the actual ventilation demand of each area can be determined. In this embodiment, the pollution level is positively correlated with the ventilation ratio of the return air valve 6 to the exhaust air channel 4. The pollution level of each zone's return air vent is positively correlated with the corresponding ventilation ratio of the return air valve 6 to the exhaust air channel 4. The worse the air quality and the more severe the pollution in the area, the greater the proportion of airflow exhausted outdoors, which can quickly expel polluted air and specifically improve local pollution.

[0050] The parameters in air quality monitoring values ​​can be set as needed. For example, parameters may include PM2.5, CO2, and TVOC. A range of values ​​corresponding to different pollution levels can be set for each parameter to determine its pollution level. The relationship between pollution level ranges and air quality monitoring values ​​is shown in the table below as an example:

[0051] In this embodiment, the step of determining the ventilation ratio of the return air valve 6 corresponding to each zone return air inlet 5 to the exhaust air channel 4 and the air inlet 1A according to the pollution level range of the air quality detection value includes: if the air quality detection value of the current zone return air inlet is in the first pollution level range, the return air valve 6 corresponding to the current zone return air inlet closes the exhaust air channel 4 and fully opens the air inlet 1A for ventilation; if the air quality detection value of the current zone return air inlet is in the second pollution level range, according to each parameter index value in the air quality detection value that reaches the parameter index value range corresponding to the second pollution level range, the ventilation ratio of the return air valve 6 corresponding to the current zone return air inlet to the exhaust air channel 4 is increased by a preset amount, and the ventilation ratio to the air inlet 1A is decreased by a preset amount; if the air quality detection value of the current zone return air inlet is in the third pollution level range, the return air valve 6 corresponding to the current zone return air inlet fully opens the exhaust air channel 4 for ventilation and closes the air inlet 1A for ventilation. The lower limit of the second pollution level range is greater than the upper limit of the first pollution level range, and the lower limit of the third pollution level range is greater than the upper limit of the third pollution level range. The preset range can be pre-set based on experimental data; for example, the preset range could be one-third of the total airflow when the return air valve 6 is fully open.

[0052] By dividing indoor air quality into multiple pollution levels and employing differentiated return air valve 6 control strategies for each level, the system achieves graded treatment of light, moderate, and heavy pollution, resulting in more precise air quality regulation. In the first pollution level range, the exhaust duct 4 is closed, and all return air enters the indoor air conditioning unit 1, fully recovering cooling or heating energy and avoiding unnecessary energy loss. This significantly reduces air conditioning energy consumption while ensuring clean air. In the second pollution level range, the exhaust ratio is increased in stages based on the number of parameters exceeding the standard. Each additional parameter exceeding the standard increases the exhaust volume, gradually improving the purification effect without excessive exhaust causing energy waste, achieving a dynamic balance between air quality and energy consumption. In the third pollution level range, the exhaust duct 4 is fully open, cutting off the air conditioning return air and directly exhausting all polluted air outdoors, preventing polluted air from circulating indoors, rapidly reducing pollutant concentration, and ensuring safe indoor air quality.

[0053] In this embodiment, see Figure 4When determining the ventilation ratio of each zone's return air vent 5 to the exhaust duct 4 and air inlet 1A via the return air valve 6, based on the pollution level range of the air quality detection value, step S11 is also executed to obtain the indoor temperature of the area where each zone's return air vent 5 is located. The indoor temperature of the area where the zone's return air vent 5 is located can be obtained by detecting the temperature sensor 8. Detecting the ambient temperature of the area where each zone's return air vent 5 is located is to confirm the actual cooling or heating demand of each area.

[0054] After obtaining the indoor temperature of the area where each zone's return air vent 5 is located, step S12 is executed to determine that the absolute value of the difference between the indoor temperature of the current zone's return air vent area and the set temperature is greater than a first preset temperature value. The first preset temperature value can be preset based on experimental data; for example, the first preset temperature value is 3℃.

[0055] If the absolute value of the difference between the indoor temperature and the set temperature in the area where the current zone's return air vent is located is greater than the first preset temperature value, then step S13 is executed to determine whether the air quality detection value is not within the third pollution level range. If the absolute value of the difference between the indoor temperature and the set temperature in the area where the current zone's return air vent is located is greater than the first preset temperature value, it indicates that the current temperature demand is high, and the user's temperature demand needs to be prioritized. Since the priority of the air quality detection value is higher than the temperature demand, it is also necessary to determine whether the air quality detection value is not within the third pollution level range.

[0056] If the air quality detection value is not in the third pollution level range, then step S14 is executed: the return air valve 6 corresponding to the current zone's return air vent closes the exhaust air passage 4 and fully opens the air inlet 1A for ventilation. If the air quality detection value is not in the third pollution level range, it indicates that the air pollution is relatively low. When the indoor temperature in a certain area deviates significantly from the set temperature, even if there is a certain degree of air pollution in that area, the exhaust air is preferentially shut off, and all return air enters the indoor unit 1 of the air conditioner for temperature adjustment, prioritizing the satisfaction of human body temperature comfort and avoiding slow temperature adjustment and discomfort due to excessive exhaust air.

[0057] After determining the ventilation ratio of each zone's return air inlet 5 to the exhaust duct 4 and air inlet 1A via the return air valve 6, based on the pollution level range of the air quality monitoring values, step S3 is executed. The opening degree of the fresh air valve 3 is determined according to the ventilation ratio of all return air valves 6 to the exhaust duct 4, ensuring a balance between the exhaust volume of the exhaust duct 4 and the intake volume of the fresh air valve 3. To match the intake volume of the fresh air valve 3 with the exhaust volume of the exhaust duct 4, the opening degree of the fresh air valve 3 needs to be adjusted according to the ventilation ratio of all return air valves 6 to the exhaust duct 4.

[0058] In this embodiment, the step of determining the opening degree of the fresh air valve 3 based on the ventilation ratio of all return air valves 6 to exhaust air channel 4 includes: determining the opening degree of the fresh air valve 3 based on the sum of the ventilation ratios of all return air valves 6 to exhaust air channel 4. The opening degree of the fresh air valve 3 is adjusted by the sum of the exhaust ratios of all return air valves 6, so that the fresh air intake can follow the changes in the total exhaust air volume in real time, ensuring a basic balance between indoor exhaust and intake air, avoiding excessive negative or positive pressure in the room, and maintaining stable indoor air pressure. The ventilation ratio of return air valves 6 to exhaust air channel 4 can be achieved by adjusting the opening degree of return air valves 6 to exhaust air channel 4, for example... Figure 1 There are four return air inlets. The full opening degree of a single return air valve 6 to the exhaust air channel 4 is 1. The fresh air introduction speed of the fully opened fresh air valve 3 is equivalent to the air exhaust speed of the outdoor exhaust direction when all return air valves 6 are fully opened. The corresponding opening degree of the fresh air valve 3 is 1 / 4. Then, the opening degree of the return air valve 6 to the exhaust air channel 4 in one area is 1 / 3, and the opening degree of the return air valve 6 in other areas is 0. At this time, the opening degree of the fresh air valve 3 is 1 / 12.

[0059] In one embodiment, see Figure 5 After determining the opening degree of the fresh air valve 3 based on the ventilation ratio of all return air valves 6 to exhaust air duct 4, step S4 is executed to determine the dwell time of the sweeping plate 9 when sweeping the area where the zoned return air inlet 5 is located, based on the ventilation ratio of each return air valve 6 to exhaust air duct 4. By linking the dwell time of the sweeping plate 9 with the exhaust ratio of each area, areas with a large exhaust ratio and heavy pollution can have a longer dwell time of the sweeping plate 9, allowing more fresh air to act on the polluted area. This achieves precise matching of exhaust air purification and quickly improves local air quality.

[0060] In another embodiment, the center Z of the air outlet of the indoor unit 1 of the air conditioner (see...) Figure 1 Using [a certain boundary] as the dividing line, physical space A is divided into the first region and the second region. See also... Figure 6After determining the opening degree of the fresh air valve 3 based on the ventilation ratio of all return air valves 6 to exhaust air duct 4, step S5 is further executed. This involves determining the dwell time of the sweeping plate 9 when sweeping the first area based on the ventilation ratio of all zone return air inlets 5 corresponding to the return air valves 6 to exhaust air duct 4; and / or determining the dwell time of the sweeping plate 9 when sweeping the second area based on the ventilation ratio of all zone return air inlets 5 corresponding to the return air valves 6 to exhaust air duct 4. The first and second areas are divided with the center of the air conditioning outlet as the boundary. The dwell time of the sweeping plate 9 is independently controlled according to the total exhaust air ratio of each area, achieving differentiated air supply to the left and right zones. This allows the more polluted side to receive longer directional air supply, making purification more targeted. The higher the exhaust air ratio of a certain area, the more severe the pollution in that area, and the longer the sweeping plate 9 stays in that area. This allows the air conditioning outlet and fresh air to act more concentratedly on the polluted area, quickly diluting pollutants and improving overall air purification efficiency.

[0061] In this embodiment, the duration of the sweeping motion of the sweeping plate 9 during sweeping of the first area is as follows: Obtained from the following formula: The duration of the sweeping plate 9 during the second zone sweeping process. Obtained from the following formula: ;in, This is the sum of the ventilation ratios of all return air vents 5 in the first zone corresponding to the return air valves 6 venting to the exhaust air ducts 4. This is the sum of the ventilation ratios of all return air vents 5 in the second region corresponding to the return air valves 6 venting to the exhaust air ducts 4. This is the sum of the ventilation ratios of all return air vents 5 in physical space A, corresponding to the return air valves 6, which ventilate to the exhaust air duct 4. The preset total dwell time for the sweeping cycle is used as a baseline. The dwell time for the sweeping cycle in the first and second zones is proportionally allocated based on the preset total dwell time for the sweeping cycle, ensuring a stable overall sweeping cycle and a uniform airflow rhythm. This prevents the airflow from fluctuating due to changes in the proportion, thus improving the comfort of the user.

[0062] In this embodiment, after determining the opening degree of the fresh air valve 3 based on the ventilation ratio of all return air valves 6 to exhaust air duct 4, the method further includes: obtaining the exhaust air pressure and fresh air pressure; controlling the power of the exhaust fan 12 based on the exhaust air pressure and fresh air pressure to balance the exhaust air pressure and fresh air pressure. When controlling the power of the exhaust fan 12 based on the exhaust air pressure and fresh air pressure, the exhaust air pressure and fresh air pressure can be compared. If the exhaust air pressure is less than the fresh air pressure, the power of the exhaust fan 12 is increased; if the exhaust air pressure is greater than the fresh air pressure, the power of the exhaust fan 12 is decreased, so that the exhaust air pressure and fresh air pressure are close to equal. When introducing fresh air, if the fresh air volume is too large and does not match the exhaust air volume, it can easily cause system imbalance, resulting in indoor air pressure being higher than outdoor air pressure. This makes it difficult to close doors and windows, and air can leak out through gaps. In severe cases, windows and door frames may make a "humming" noise or vibrate due to the air pressure difference. It can also prevent fresh air from effectively replacing indoor air, reducing ventilation efficiency and causing serious energy waste. By using the first pressure sensor 10 and the second pressure sensor 11 to collect exhaust air pressure and fresh air pressure in real time, the power of the exhaust fan 12 is adjusted according to the pressure difference, avoiding errors caused by estimating air volume solely based on the opening of the damper, and ensuring the stability of indoor and outdoor air pressure.

[0063] As described above, in the air conditioning fresh air control method of the present invention, by detecting the air quality at the return air inlets 5 of different areas, the exhaust and return air ratios of the corresponding return air valves 6 can be independently adjusted according to the actual pollution level of each area, thereby achieving differentiated air treatment for each zone. This avoids the problem of difficulty in improving the air quality of locally polluted areas under a single air volume control mode, and improves the overall indoor air quality. At the same time, the opening of the fresh air valves 3 is adjusted according to the total exhaust air ratio of each return air valve 6, so that the exhaust air volume and the fresh air intake air volume are matched and balanced in real time. This prevents indoor negative pressure and backflow of polluted outside air due to excessive exhaust air, and also avoids excessive positive pressure and energy waste caused by excessive fresh air, ensuring stable and comfortable indoor air pressure.

[0064] Air conditioner example: The air conditioner in this embodiment includes a controller, which executes the steps in the above-described air conditioning fresh air control method embodiment when executing a computer program.

[0065] For example, a computer program can be divided into one or more modules, one or more of which are stored in memory and executed by a controller to complete the present invention. One or more modules can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in an air conditioner.

[0066] An air conditioner may include, but is not limited to, a controller and a memory. Those skilled in the art will understand that an air conditioner may include more or fewer components, or a combination of certain components, or different components; for example, an air conditioner may also include input / output devices, network access devices, buses, etc.

[0067] For example, the controller can be a Central Processing Unit (CPU), or other general-purpose controllers, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose controller can be a microcontroller or any conventional controller. The controller is the control center of the air conditioner, connecting all parts of the air conditioner through various interfaces and lines.

[0068] The memory can be used to store computer programs and / or modules. The controller implements various functions of the air conditioner by running or executing the computer programs and / or modules stored in the memory, and by calling the data stored in the memory. For example, the memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound receiving function, sound-to-text function, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, text data, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0069] Examples of computer-readable storage media: If the modules integrated into the air conditioner in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above air conditioning fresh air control method embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a controller, it can implement the steps of the above air conditioning fresh air control method embodiments. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The storage medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0070] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A method for controlling fresh air in an air conditioning system, applied to an air conditioning fresh air system, the air conditioning fresh air system comprising a fresh air duct, a fresh air valve, an exhaust air duct, and two or more zoned return air vents, wherein the fresh air valve is installed in the fresh air duct, and the two or more zoned return air vents are respectively located in different areas of the physical space where the air conditioning fresh air system is located; characterized in that: Each of the aforementioned zone return air vents is connected to the exhaust duct and the air inlet of the indoor unit of the air conditioner via a return air valve. The return air valve is used to control the ventilation ratio to the exhaust duct and the air inlet. The method includes: The air conditioner is now in operation. Obtain the air quality detection value of each of the partition return air vents, and determine the ventilation ratio of the return air valve corresponding to each of the partition return air vents to the exhaust air channel and the air inlet based on the pollution level range of the air quality detection value; The opening degree of the fresh air valve is determined based on the ventilation ratio of all the return air valves to the exhaust air duct, so that the exhaust volume of the exhaust air duct and the intake volume of the fresh air valve are in a balanced state.

2. The air conditioning fresh air control method according to claim 1, characterized in that: The degree of pollution at each of the zone return air inlets is positively correlated with the ventilation ratio of the corresponding return air valve to the exhaust duct.

3. The air conditioning fresh air control method according to claim 1, characterized in that: The steps for determining the ventilation ratio of the return air valve corresponding to each zone's return air inlet to the exhaust duct and the air inlet based on the pollution level range of the air quality detection value include: If the air quality detection value of the current zone return air vent is in the first pollution level range, the return air valve corresponding to the current zone return air vent closes the exhaust channel and opens the air inlet for full ventilation; If the air quality detection value of the current zone return air vent is in the second pollution level range, according to the fact that each parameter index value in the air quality detection value reaches the parameter index value range corresponding to the second pollution level range, the ventilation ratio of the return air valve corresponding to the current zone return air vent to the exhaust air channel is increased by a preset amount, and the ventilation ratio of the return air valve to the air inlet is decreased by the preset amount. If the air quality detection value of the current zone return air vent is in the third pollution level range, the return air valve corresponding to the current zone return air vent will be fully opened to the exhaust air channel and closed to the air inlet. The lower limit of the second pollution level range is greater than the upper limit of the first pollution level range, and the lower limit of the third pollution level range is greater than the upper limit of the second pollution level range.

4. The air conditioning fresh air control method according to claim 3, characterized in that: The step of determining the ventilation ratio of the return air valve corresponding to each zone's return air inlet to the exhaust duct and the air inlet based on the pollution level range of the air quality detection value further includes: Obtain the indoor temperature of the area where each of the partition return air vents is located; If the absolute value of the difference between the indoor temperature and the set temperature in the area where the current zone return air vent is located is greater than the first preset temperature value, and the air quality detection value is not in the third pollution level range, then the return air valve corresponding to the current zone return air vent closes the exhaust channel and fully opens the air inlet for ventilation.

5. The air conditioning fresh air control method according to any one of claims 1 to 4, characterized in that: The step of determining the opening degree of the fresh air valve based on the ventilation ratio of all the return air valves to the exhaust air duct includes: The opening degree of the fresh air valve is determined based on the sum of the ventilation ratios of all the return air valves ventilating to the exhaust air duct.

6. The air conditioning fresh air control method according to any one of claims 1 to 4, characterized in that: After determining the opening degree of the fresh air valve based on the ventilation ratio of all the aforementioned return air valves to the exhaust air duct, the method further includes: The duration of the sweeping plate's stay when sweeping the area where the zoned return air inlet is located is determined based on the ventilation ratio of each of the return air valves to the exhaust air duct.

7. The air conditioning fresh air control method according to any one of claims 1 to 4, characterized in that: The physical space is divided into a first area and a second area, with the center of the air outlet of the indoor unit of the air conditioner as the boundary. After determining the opening degree of the fresh air valve based on the ventilation ratio of all the aforementioned return air valves to the exhaust air duct, the method further includes: The duration of the sweeping plate when sweeping the first area is determined based on the ventilation ratio of the return air valves corresponding to all the return air vents in the first area to the exhaust duct. and / or The duration of the sweeping plate's stay during sweeping the second area is determined based on the ventilation ratio of the return air valves corresponding to all the partition return air vents in the second area to the exhaust air duct.

8. The air conditioning fresh air control method according to claim 7, characterized in that: The duration of the sweeping plate's sweeping motion over the first area Obtained from the following formula: ； The duration of the sweeping plate's dwell time when sweeping the second area Obtained from the following formula: ； in, This is the sum of the ventilation ratios of all return air valves corresponding to the return air vents in the first region, which ventilate the exhaust duct. This is the sum of the ventilation ratios of all return air valves corresponding to the return air vents in the second region, which ventilate into the exhaust duct. This refers to the sum of the ventilation ratios of all return air valves corresponding to the return air vents of the various zones in the physical space, which ventilate into the exhaust duct. This is the preset total dwell time for the sweeping process.

9. The air conditioning fresh air control method according to any one of claims 1 to 4, characterized in that: The exhaust duct is equipped with an exhaust fan and a first pressure sensor for detecting the exhaust air pressure of the exhaust duct, and the fresh air duct is equipped with a second pressure sensor for detecting the fresh air pressure of the fresh air duct. After determining the opening degree of the fresh air valve based on the ventilation ratio of all the aforementioned return air valves to the exhaust air duct, the method further includes: Obtain the exhaust air pressure and the fresh air pressure; The power of the exhaust fan is controlled according to the exhaust air pressure and the fresh air pressure to balance the exhaust air pressure and the fresh air pressure.

10. An air conditioning fresh air system, comprising a fresh air duct, a fresh air valve, an exhaust air duct, and two or more zoned return air vents, wherein the fresh air valve is installed within the fresh air duct, and the two or more zoned return air vents are respectively located in different areas of the physical space where the air conditioning fresh air system is located; characterized in that: Each of the aforementioned zone return air vents is connected to the exhaust duct and the air inlet of the indoor unit of the air conditioner via a return air valve. The return air valve is used to control the ventilation ratio to the exhaust duct and the air inlet. The controller is used to acquire the air quality detection value of each of the zone return air vents when the air conditioner enters the working state, and determine the ventilation ratio of the return air valve corresponding to each of the zone return air vents to the exhaust air channel and the air inlet according to the pollution level range of the air quality detection value; The opening degree of the fresh air valve is determined based on the ventilation ratio of all the return air valves to the exhaust air duct, so that the exhaust volume of the exhaust air duct and the intake volume of the fresh air valve are in a balanced state.

11. An air conditioner, comprising a processor and a memory, characterized in that: The memory stores a computer program, which, when executed by the processor, implements the steps of the air conditioning fresh air control method as described in any one of claims 1 to 9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the controller, it implements the steps of the air conditioning fresh air control method as described in any one of claims 1 to 9.

Images