A control method and device of an air conditioner, the air conditioner, and a storage medium

Abstract

This invention discloses a control method, device, air conditioner, and storage medium for an air conditioner. The air conditioner is installed in a suspended ceiling, and a return air vent is provided on the ceiling. A return air filter assembly with a first filter layer and a second filter layer is installed at the return air vent. A first fan is installed on the evaporator side of the air conditioner, and a second fan is installed on the condenser side. The method includes: when the air conditioner is running, controlling the opening and closing states of the first and second filter layers according to the relative air pressure in the room; and controlling the rotational speeds of the first and second fans according to the relative air pressure in the room and the relative air pressure in the suspended ceiling. This solution, by setting two filter layers with different filtration capacities at the return air vent in the indoor suspended ceiling, and combining the control of the opening and closing states of the two filter layers and the rotational speeds of the first and second fans, effectively filters oil fumes while adjusting the air pressure in the suspended ceiling space, ensuring sufficient air intake and exhaust volume for the air conditioner, thus guaranteeing its cooling performance.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to an air conditioning control method, device, air conditioner, and storage medium, and more particularly to a control method, device, ceiling-mounted air conditioner, and storage medium for return air filtration of a ceiling-mounted air conditioner. Background Technology

[0002] Because kitchens become unbearably hot while cooking, cooling equipment in the kitchen space has become a pressing need. There are three main types of kitchen air conditioners on the market: First, portable air conditioners, which can lower the temperature in a limited space. However, portable air conditioners are generally not designed specifically for the kitchen environment. The high oil and humidity in the kitchen can damage portable units. High oil primarily affects the heat exchange efficiency of the unit's fins and causes corrosion, and the oil stains are difficult to clean. High humidity results in more condensation, requiring special treatment. Second, split-type air conditioners are generally designed specifically for the kitchen environment and are somewhat adaptable to high oil and humidity. However, according to research, most homes do not have space for the outdoor unit, requiring a bracket to be fixed to the exterior wall, which compromises safety and stability. Third, air conditioners can be embedded in range hoods. However, due to the limited size of range hoods, complex structural design, and high cost, the market is smaller and less readily accepted by users.

[0003] Therefore, a better solution for cooling needs in kitchens is to use an integrated kitchen air conditioner, placed within the kitchen ceiling space, with return air vents and indoor unit air outlets in the ceiling. However, because both the indoor and outdoor units of the integrated kitchen air conditioner draw air through the return air vents, and due to the high humidity and oily environment of the kitchen, grease and fumes need to be filtered at the return air vents, the airflow resistance at the return air vents is relatively high. Furthermore, the negative pressure environment within the ceiling space results in low airflow at both the evaporator and condenser ends, leading to a small overall air volume from the air conditioner.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a control method, device, air conditioner, and storage medium for an air conditioner, to solve the problem in related solutions where integrated kitchen air conditioners installed in the ceiling have high air resistance at the return air inlet due to the need to filter oil fumes, and the negative pressure environment in the ceiling space, resulting in low air volume at the evaporator and condenser ends, and low air supply volume. This invention achieves this by setting two filter layers with different filtration capabilities at the return air inlet in the indoor ceiling, and by controlling the opening and closing states of the filter layers, the speed of the first fan, and the speed of the second fan, while effectively filtering oil fumes, adjusting the air pressure in the ceiling space to ensure sufficient air intake and exhaust volume for the air conditioner, thus guaranteeing its cooling performance and improving the user experience.

[0006] This invention provides a control method for an air conditioner, wherein the air conditioner is an integrated unit installed in the ceiling of an indoor space; a return air vent is provided on the ceiling for intake air from the indoor space into the ceiling space; the air conditioner includes an evaporator side and a condenser side; a first fan is provided on the evaporator side; a second fan is provided on the condenser side; a return air vent filter assembly is provided at the return air vent; the return air vent filter assembly includes a first filter layer and a second filter layer; the first filter layer and the second filter layer can be closed or opened respectively, and in the closed state, they can filter the air flowing through the return air vent, and in the open state, they do not filter the air flowing through the return air vent; the filtration capacity of the second filter layer is higher than that of the first filter layer; the method includes: acquiring the relative air pressure of the indoor space and the relative air pressure in the ceiling when the air conditioner is running; controlling the opening and closing states of the first filter layer and the second filter layer according to the relative air pressure in the indoor space; and controlling the rotation speed of the first fan and the second fan according to the relative air pressure in the indoor space and the relative air pressure in the ceiling.

[0007] In some embodiments, controlling the opening and closing states of the first filter layer and the second filter layer according to the relative air pressure in the room includes: determining the air pressure range in which the relative air pressure in the room is located; if the relative air pressure in the room is in a first air pressure range, then closing the first filter layer and the second filter layer respectively; if the relative air pressure in the room is in a second air pressure range, then opening the first filter layer and closing the second filter layer; if the relative air pressure in the room is in a third air pressure range, then closing the first filter layer and opening the second filter layer.

[0008] In some embodiments, controlling the rotational speeds of the first fan and the second fan based on the relative air pressure in the room and the relative air pressure in the ceiling includes: determining the air pressure range of the relative air pressure in the room; and determining the air pressure range of the pressure difference between the relative air pressure in the room and the relative air pressure in the ceiling; determining rotational speed control coefficients for the first fan and the second fan respectively based on the air pressure range of the relative air pressure in the room and the air pressure range of the pressure difference; determining the current rotational speed of the first fan and the current rotational speed of the second fan respectively based on the rotational speed control coefficients and the maximum rotational speed of the first fan and the second fan; and controlling the first fan and the second fan to operate at their respective current rotational speeds.

[0009] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioner, wherein the air conditioner is an integrated air conditioner installed in the ceiling of an indoor space; a return air vent is provided on the ceiling for intake air from the indoor space into the ceiling space; the air conditioner includes an evaporator side and a condenser side; a first fan is provided on the evaporator side; a second fan is provided on the condenser side; a return air vent filter assembly is provided at the return air vent; the return air vent filter assembly includes a first filter layer and a second filter layer; the first filter layer and the second filter layer can be closed or opened respectively, and in the closed state, they can refract the airflow. The air at the return air vent is filtered, but when open, the air flowing through the return air vent is not filtered; the second filter layer has a higher filtration capacity than the first filter layer; the device includes: an acquisition unit configured to acquire the relative air pressure of the indoor space and the relative air pressure in the ceiling when the air conditioner is running; a control unit configured to control the opening and closing states of the first filter layer and the second filter layer according to the relative air pressure in the room; and to control the speed of the first fan and the second fan according to the relative air pressure in the room and the relative air pressure in the ceiling.

[0010] In some embodiments, the control unit controls the opening and closing states of the first filter layer and the second filter layer according to the relative air pressure in the room, including: determining the air pressure range in which the relative air pressure in the room is located; if the relative air pressure in the room is in a first air pressure range, then closing the first filter layer and the second filter layer respectively; if the relative air pressure in the room is in a second air pressure range, then opening the first filter layer and closing the second filter layer; if the relative air pressure in the room is in a third air pressure range, then closing the first filter layer and opening the second filter layer.

[0011] In some embodiments, the control unit controls the rotational speeds of the first fan and the second fan based on the relative air pressure in the room and the relative air pressure in the ceiling, including: determining the air pressure range of the relative air pressure in the room; and determining the air pressure range of the pressure difference between the relative air pressure in the room and the relative air pressure in the ceiling; determining rotational speed control coefficients for the first fan and the second fan respectively based on the air pressure range of the relative air pressure in the room and the air pressure range of the pressure difference; determining the current rotational speed of the first fan and the current rotational speed of the second fan respectively based on the rotational speed control coefficients and the maximum rotational speed of the first fan and the second fan; and controlling the first fan and the second fan to operate at their respective current rotational speeds.

[0012] In conjunction with the above-described device, the present invention further provides an air conditioner, comprising: the control device for the air conditioner described above.

[0013] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device on which the storage medium is located controls the air conditioner control method described above to be performed.

[0014] The present invention provides a return air vent filter assembly with a first filter layer and a second filter layer having different filtration capabilities at the return air vent in the ceiling. During air conditioning operation, the opening and closing states of the first and second filter layers are controlled according to the relative air pressure in the room. Furthermore, the rotational speeds of the first fan on the evaporator side and the second fan on the condenser side are controlled based on the relative air pressure in the room and within the ceiling. By controlling the opening and closing states of the filter layers and the rotational speeds of the first and second fans, the air pressure within the ceiling space is adjusted while effectively filtering oil fumes. This ensures sufficient air intake and exhaust volume for the air conditioner, guaranteeing its cooling performance and improving the user experience.

[0015] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating an embodiment of the air conditioner control method of the present invention;

[0018] Figure 2 This is a flowchart illustrating an embodiment of the method of the present invention for controlling the opening and closing states of two filter layers.

[0019] Figure 3 This is a schematic flowchart of an embodiment of the method of the present invention for controlling the rotational speed of the first fan and the second fan;

[0020] Figure 4 This is a schematic diagram of the structure of an embodiment of the air conditioner control device of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of an embodiment of the air return vent filter assembly of the air conditioner of the present invention;

[0022] Figure 6 This is a schematic diagram of another embodiment of the air return vent filter assembly of the air conditioner of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of an embodiment of the air return air vent filter assembly of the air conditioner of the present invention, showing the open and closed state of the filter layer.

[0024] Figure 8This is a schematic flowchart of an embodiment of the air return air filtration control method for an air conditioner according to the present invention.

[0025] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0026] 102 - Acquisition unit; 104 - Control unit. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] Generally, return air filtration systems have relatively high intake resistance to ensure filtration effectiveness. This causes the negative pressure in the kitchen ceiling space to increase as the air conditioner fan exhausts air outwards. The airflow can only return through gaps in the ceiling, and this returning air usually carries significant amounts of cooking fumes and is highly humid. The grease and fumes can contaminate the air conditioner itself, corrode structural components, cause structural damage that is difficult to clean, and the high humidity leads to increased condensation. If this exceeds the structure's drainage capacity, leaks will occur.

[0029] Therefore, this invention provides an air conditioner control method. By setting filter layers with different filtration effects and combining the control of the opening and closing state of the filter layers and the air conditioner fan speed, the air pressure in the ceiling space is adjusted under the premise of effectively filtering oil fumes, so as to prevent oil fumes from entering the ceiling space through the ceiling gaps and polluting the air conditioner, and to ensure the normal operation of the air conditioner.

[0030] According to an embodiment of the present invention, a control method for an air conditioner is provided. The air conditioner is an integrated air conditioner installed in the ceiling of an indoor space. A return air vent is provided on the ceiling for intake air from the indoor space into the ceiling space. The air conditioner includes an evaporator side and a condenser side. A first fan is provided on the evaporator side, and a second fan is provided on the condenser side. Each of the evaporator side and the condenser side has an air inlet and an air outlet. The first fan is used for intake air from the ceiling space on the evaporator side and for supplying air to the indoor space; the second fan is used for intake air from the ceiling space on the condenser side and for exhausting air to the outside. A return air vent filter assembly is provided at the return air vent. The return air vent filter assembly includes a first filter layer and a second filter layer. The first filter layer and the second filter layer can be closed or opened respectively. In the closed state, they can filter the air flowing through the return air vent; in the open state, they do not filter the air flowing through the return air vent. The filtration capacity of the second filter layer is higher than that of the first filter layer. Specifically, the structure of the return air vent filter assembly is as follows: Figure 5 and Figure 6 As shown, the outer side of the air vent filter assembly is a return air vent frame. This frame is identical in shape and size to the ceiling-mounted return air vent, ensuring the filter assembly is stably installed on and completely covers it. The filter assembly also contains a first filter and a second filter with different filtration levels for oil fumes. The first filter has a lower filtration level, while the second filter has a higher filtration level. Both filters can be closed or opened. Figure 7 As shown, when the filter screen is fully open, it is filter paper state 1, in which the filter paper does not filter the air passing through the return air vent; when the filter screen is fully closed, it is filter paper state 2, in which the filter paper filters the air passing through the return air vent. The return air vent filter assembly also has a filter screen compartment, which can be stored when the filter screen is fully folded open. The return air vent filter assembly also has two drive rails, which serve as the moving rails for the first and second filters when they are closed or opened. A first gear, specifically driven by the first filter screen, meshes with one side of a positioning double-sided rack between the two drive rails. By controlling the movement of the first gear on the positioning double-sided rack, the first filter screen can be closed or opened. Similarly, a second gear, specifically driven by the second filter screen, meshes with the other side of a positioning double-sided rack between the two drive rails. By controlling the movement of the second gear on the positioning double-sided rack, the second filter screen can be closed or opened.

[0031] Based on the structure of this return air vent filter assembly, four different levels of filtration can be achieved for the air passing through the return air vent. When both the first and second filters are open, it is an unfiltered state, and no air is filtered. When the first filter is closed and the second filter is open, it is a coarse filtration state, with a lower degree of air filtration. When the first filter is open and the second filter is closed, it is a fine filtration state, with a higher degree of air filtration, capable of filtering out most of the oil fumes in the air. When both the first and second filters are closed, it is a strong filtration state, with the highest degree of air filtration, capable of filtering out the vast majority of oil fumes in the air, but also with the greatest air resistance.

[0032] like Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The air conditioner control method may include steps S110 and S120.

[0033] In step S110, while the air conditioner is running, the relative air pressure of the indoor space and the relative air pressure inside the ceiling are obtained.

[0034] Two pressure sensors can be installed. The first pressure sensor acquires air pressure data from the kitchen space, representing the relative pressure of the kitchen air conditioner relative to one atmosphere. When the pressure is negative, it indicates that outside air is being drawn into the kitchen space. The larger the absolute value, the stronger the suction. In a residential kitchen, this means that the range hood and kitchen air conditioner are removing more airflow. The second pressure sensor acquires air pressure data from the ceiling space, representing the relative pressure within the ceiling space relative to one atmosphere.

[0035] In step S120, the opening and closing states of the first filter layer and the second filter layer are controlled according to the relative air pressure in the room; and the rotation speeds of the first fan and the second fan are controlled according to the relative air pressure in the room and the relative air pressure in the ceiling.

[0036] When the first or second filter layer is closed, the ability to filter oil fumes in the air is enhanced, but the air intake resistance when the return air vent enters the indoor space is also increased. The air volume obtained by the evaporator and condenser sides of the air conditioner is reduced. Therefore, it is necessary to adjust the speed of the first and second fans accordingly to ensure that the air conditioner obtains enough air for heat exchange and to ensure the normal operation of the air conditioner.

[0037] In some embodiments, the specific process of controlling the opening and closing states of the first filter layer and the second filter layer according to the relative air pressure in the room in step S120 is as follows: Figure 2 As shown, it includes steps S210 to S240.

[0038] Step S210: Determine the pressure range of the relative air pressure in the room.

[0039] Step S220: If the relative air pressure in the room is within the first air pressure range, then close the first filter layer and the second filter layer respectively.

[0040] The first pressure range is defined as a pressure less than -15 Pa. When the indoor relative pressure falls within this range, it indicates significant kitchen fumes, the user has turned on the range hood or kitchen air conditioner, and the range hood or air conditioner is drawing a large amount of air from the room, resulting in substantial airflow loss and low indoor relative pressure. Therefore, to prevent significant fumes from polluting the air conditioner's interior, both the first and second filter layers must be closed simultaneously to effectively filter the fumes entering the ceiling, thus preventing fumes from entering the air conditioner through the evaporator and condenser side inlets.

[0041] Step S230: If the relative air pressure in the room is in the second air pressure range, then open the first filter layer and close the second filter layer.

[0042] The second pressure range is between -15Pa and -10Pa. Within this range, the kitchen range hood is considered to be operating at low power. Although oil fumes are present in the air, their concentration is low. Therefore, the second filter layer is activated while the first filter layer is turned on. This maintains the filtration of oil fumes while preventing excessive resistance when the ceiling draws air from the room.

[0043] Step S240: If the relative air pressure in the room is in the third air pressure range, then close the first filter layer and open the second filter layer.

[0044] The third pressure range is greater than -10Pa. When the relative air pressure in the room is within the third pressure range, the range hood is considered to be on. At this time, only the first filter layer needs to be turned on for filtration, and the air intake from the return air vent is also relatively small.

[0045] Figure 8 This is a schematic flowchart of an embodiment of the air conditioner return air filtration control method of the present invention, as shown below. Figure 8 As shown, the control method of the present invention includes:

[0046] Step 1: After the kitchen air conditioner is turned on, the first air pressure sensor is used to detect the relative air pressure in the kitchen space, and the second air pressure sensor is used to detect the relative air pressure in the ceiling space. Then, steps 2 and 3 are executed respectively.

[0047] Step 2: Determine the relative air pressure range of the kitchen space. If the relative air pressure is less than -15Pa, it is assumed that the range hood is operating at high power and cooking with a lot of smoke is taking place in the kitchen. In this case, the first and second filters are closed simultaneously to activate the strong filtration mode. If the relative air pressure is between -15Pa and -10Pa, it is assumed that the range hood is operating at low power and cooking with a little smoke is taking place in the kitchen. In this case, the first filter is opened and the second filter is closed to activate the second filtration mode. If the relative air pressure is greater than -10Pa, it is assumed that the range hood is off, cooking is not taking place in the kitchen, and no smoke is generated. In this case, the second filter is opened and the first filter is closed to activate the second filtration mode.

[0048] In some embodiments, the specific process of controlling the rotational speeds of the first and second fans in step S120 based on the relative air pressure in the room and the relative air pressure in the ceiling is as follows: Figure 3 As shown, it includes steps S310 to S340.

[0049] Step S310: Determine the air pressure range of the relative air pressure in the room; and determine the air pressure range of the air pressure difference between the relative air pressure in the room and the relative air pressure in the ceiling.

[0050] The relative air pressure range within the room includes a first pressure range of less than -15 Pa, a second pressure range of -15 Pa to -10 Pa, and a third pressure range of greater than -10 Pa. The pressure difference between the relative air pressure inside the room and the relative air pressure within the ceiling includes a fourth pressure range of greater than 10 Pa, a fifth pressure range of 10 Pa to 5 Pa, and a sixth pressure range of less than 5 Pa.

[0051] Integrated ceiling-mounted air conditioners are installed within the ceiling space. The evaporator and condenser sides of the air conditioner draw air from the ceiling space. As the air conditioner operates, it continuously blows air from the ceiling space to the indoor or outdoor environment, creating a negative pressure environment within the ceiling space. Because the air pressure in the kitchen is relatively high, the airflow is forced into the ceiling space through the return air vent. Therefore, the pressure difference between the relative air pressure indoors and the relative air pressure inside the ceiling indicates the pressure of air entering the ceiling space from the indoor space. When the pressure difference is large, it means the air pressure entering the ceiling space from the indoor space is strong. In this case, air will not only flow into the ceiling space through the return air vent but also through gaps in the ceiling. However, since gaps cannot filter cooking fumes, fumes entering the ceiling space through these gaps will contaminate the air conditioner itself, corrode structural components, cause structural damage, and are difficult to clean. If the humidity is high, it will also lead to increased condensation, exceeding the structural drainage capacity and causing leaks. Therefore, it is necessary to adjust the relative air pressure in the ceiling space to avoid an excessively small pressure difference.

[0052] Step S320: Determine the speed control coefficients of the first fan and the second fan respectively based on the pressure range of the relative air pressure in the room and the pressure range of the pressure difference.

[0053] Specifically, the speed control coefficients of the first fan and the second fan can be determined based on the data given in Table 1.

[0054] A1 A2 A3 A4 A5 A6 A7 A8 A9 1 0.9 0.85 0.85 0.7 0.6 0.75 0.63 0.5 B1 B2 B3 B4 B5 B6 B7 B8 B9 1 0.95 0.9 0.9 0.86 0.8 0.85 0.8 0.76

[0055] Table 1 Speed ​​Control Coefficients

[0056] When the relative air pressure in the room is in the first air pressure range and the air pressure difference is in the fourth air pressure range, the speed control coefficient of the first fan is A1 and the speed control coefficient of the second fan is B1; when the relative air pressure in the room is in the first air pressure range and the air pressure difference is in the fifth air pressure range, the speed control coefficient of the first fan is A2 and the speed control coefficient of the second fan is B2; when the relative air pressure in the room is in the first air pressure range and the air pressure difference is in the sixth air pressure range, the speed control coefficient of the first fan is A3 and the speed control coefficient of the second fan is B3. When the relative air pressure in the room is in the second pressure range and the pressure difference is in the fourth pressure range, the speed control coefficient of the first fan is A4 and the speed control coefficient of the second fan is B4; when the relative air pressure in the room is in the second pressure range and the pressure difference is in the fifth pressure range, the speed control coefficient of the first fan is A5 and the speed control coefficient of the second fan is B5; when the relative air pressure in the room is in the second pressure range and the pressure difference is in the sixth pressure range, the speed control coefficient of the first fan is A6 and the speed control coefficient of the second fan is B6. When the relative air pressure in the room is in the third air pressure range and the air pressure difference is in the fourth air pressure range, the speed control coefficient of the first fan is A7 and the speed control coefficient of the second fan is B7; when the relative air pressure in the room is in the third air pressure range and the air pressure difference is in the fifth air pressure range, the speed control coefficient of the first fan is A8 and the speed control coefficient of the second fan is B8; when the relative air pressure in the room is in the third air pressure range and the air pressure difference is in the sixth air pressure range, the speed control coefficient of the first fan is A9 and the speed control coefficient of the second fan is B9.

[0057] Step S330: Determine the current speed of the first fan and the current speed of the second fan based on the speed control coefficient and maximum speed of the first fan and the second fan, respectively.

[0058] After determining the speed control coefficient of the first fan, the maximum speed R1 of the first fan is... MAXBased on this, multiply by the speed control coefficient of the first fan to obtain the current speed of the first fan. For example, if the speed control coefficient of the first fan is A1, then the current speed of the first fan = A1 * R1 MAX After determining the speed control coefficient of the second fan, the maximum speed R2 of the second fan is... MAX Based on the first fan speed, multiply by the speed control coefficient of the second fan to obtain the current speed of the second fan. For example, if the speed control coefficient of the second fan is B1, then the current speed of the first fan = B1 * R2 MAX .

[0059] When the relative air pressure indoors is in the first pressure range, both the first and second filter layers are closed, and the air intake resistance at the return air vent is at its maximum. Therefore, to ensure sufficient air intake for the air conditioner, the corresponding speed control coefficients A1, A2, A3, B1, B2, and B3 are all relatively large, resulting in relatively large speed values. This allows more air to enter the ceiling space through the return air vent, preventing prolonged large pressure differences from causing cooking fumes to enter the ceiling space through gaps. Similarly, when the relative air pressure indoors is in the second or third pressure range, the air intake resistance at the return air vent gradually decreases due to the operation of the first and second filter layers, thus the corresponding speed control coefficients also gradually decrease.

[0060] When the air pressure difference is in the fourth pressure range, the pressure difference is relatively large, and cooking fumes can enter the ceiling space through the gaps in the ceiling. Therefore, to avoid this and to ensure sufficient air intake for the air conditioner, the speed control coefficient is relatively large, and the fan runs at a higher speed to reduce the air pressure difference as quickly as possible. For example, when the indoor relative air pressure is in the first pressure range, if the air pressure difference is in the fourth pressure range, the control coefficient of the first fan is the maximum A1, where A1 corresponds to a coefficient of 1, and the corresponding speed of the first fan is the maximum speed R1. MAX Similarly, when the pressure difference is in the fifth or sixth pressure range, the pressure difference gradually decreases, so the corresponding speed control coefficient also gradually decreases.

[0061] Step S340: Control the first fan and the second fan to run at their respective current speeds.

[0062] This solution combines the control of the opening and closing of the filter layer with the control of the fan speed. While effectively filtering oil fumes, it also adjusts the air pressure in the ceiling space to avoid an excessive pressure difference between the ceiling space and the indoor space. This prevents oil fumes from entering the ceiling space through gaps, while ensuring the air intake of the air conditioner so that it can cool normally.

[0063] like Figure 8 As shown, the control method of the present invention further includes:

[0064] Step 3: Calculate the pressure difference between the relative air pressure in the kitchen space and the relative air pressure in the ceiling space, and determine the range of the relative air pressure in the kitchen space. If the relative air pressure is less than -15 Pa, proceed to step 4; if the relative air pressure is between -15 Pa and -10 Pa, proceed to step 5; if the relative air pressure is greater than -10 Pa, proceed to step 6.

[0065] Step 4: Determine the range of the pressure difference. If the pressure difference is greater than 10 Pa, control the speed of the internal fan on the evaporator side to R1 = A1 * R1. MAX Control the speed of the external fan on the condenser side: R2 = B1 * R2 MAX If the pressure difference is between 5 Pa and 10 Pa, then the speed of the internal fan on the evaporator side should be controlled as R1 = A2 * R1. MAX Control the speed of the external fan on the condenser side: R2 = B2 * R2 MAX If the pressure difference is less than 5 Pa, then control the speed of the internal fan on the evaporator side to R1 = A3 * R1 MAX Control the speed of the external fan on the condenser side: R2 = B3 * R2 MAX .

[0066] Step 5: Determine the range of the pressure difference. If the pressure difference is greater than 10 Pa, control the speed of the internal fan on the evaporator side to R1 = A4 * R1. MAX Control the speed of the outdoor fan on the condenser side: R2 = B4 * R2 MAX If the pressure difference is between 5 Pa and 10 Pa, then control the internal fan speed on the evaporator side as R1 = A5 * R1 MAX Control the speed of the outdoor fan on the condenser side: R2 = B5 * R2 MAX If the pressure difference is less than 5 Pa, then control the speed of the internal fan on the evaporator side to R1 = A6 * R1 MAX Control the speed of the outdoor fan on the condenser side: R2 = B6 * R2 MAX .

[0067] Step 6: Determine the range of the pressure difference. If the pressure difference is greater than 10 Pa, control the speed of the internal fan on the evaporator side to R1 = A7 * R1. MAX Control the speed of the outdoor fan on the condenser side: R2 = B7 * R2 MAX If the pressure difference is between 5 Pa and 10 Pa, then the speed of the internal fan on the evaporator side should be controlled as R1 = A8 * R1. MAX Control the speed of the outdoor fan on the condenser side: R2 = B8 * R2 MAX If the pressure difference is less than 5 Pa, then control the speed of the internal fan on the evaporator side to R1 = A9 * R1 MAX Control the speed of the outdoor fan on the condenser side: R2 = B9 * R2 MAX .

[0068] The technical solution of this embodiment involves installing a return air vent filter assembly with a first filter layer and a second filter layer having different filtration capabilities at the return air vent in the ceiling. During air conditioning operation, the opening and closing states of the first and second filter layers are controlled according to the relative air pressure in the room. Furthermore, the speed of the first fan on the evaporator side and the speed of the second fan on the condenser side are controlled based on the relative air pressure in the room and the relative air pressure within the ceiling. By controlling the opening and closing states of the filter layers and the speeds of the first and second fans, the air pressure within the ceiling space is adjusted while effectively filtering oil fumes, ensuring sufficient air intake and exhaust volume for the air conditioner, guaranteeing its cooling performance, and improving the user experience.

[0069] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method of the air conditioner is also provided. The air conditioner is an integrated air conditioner installed in the ceiling of an indoor unit; a return air vent is provided on the ceiling for intake air from the indoor space into the ceiling space; the air conditioner includes an evaporator side and a condenser side; a first fan is provided on the evaporator side; a second fan is provided on the condenser side; each of the evaporator side and the condenser side has an air inlet and an air outlet. The first fan is used for intake air from the ceiling space on the evaporator side and for supplying air to the indoor space; the second fan is used for intake air from the ceiling space on the condenser side and for exhausting air to the outside. A return air vent filter assembly is provided at the return air vent; the return air vent filter assembly includes a first filter layer and a second filter layer; the first filter layer and the second filter layer can be closed or opened respectively, filtering the air flowing through the return air vent when closed, and not filtering the air flowing through the return air vent when open; the filtration capacity of the second filter layer is higher than that of the first filter layer. Specifically, the structure of the return air vent filter assembly is as follows: Figure 5 and Figure 6 As shown, the outer side of the air vent filter assembly is a return air vent frame. This frame is identical in shape and size to the ceiling-mounted return air vent, ensuring the filter assembly is stably installed on and completely covers it. The filter assembly also contains a first filter and a second filter with different filtration levels for oil fumes. The first filter has a lower filtration level, while the second filter has a higher filtration level. Both filters can be closed or opened. Figure 7As shown, when the filter screen is fully open, it is filter paper state 1, in which the filter paper does not filter the air passing through the return air vent; when the filter screen is fully closed, it is filter paper state 2, in which the filter paper filters the air passing through the return air vent. The return air vent filter assembly also has a filter screen compartment, which can be stored when the filter screen is fully folded open. The return air vent filter assembly also has two drive rails, which serve as the moving rails for the first and second filters when they are closed or opened. A first gear, specifically driven by the first filter screen, meshes with one side of a positioning double-sided rack between the two drive rails. By controlling the movement of the first gear on the positioning double-sided rack, the first filter screen can be closed or opened. Similarly, a second gear, specifically driven by the second filter screen, meshes with the other side of a positioning double-sided rack between the two drive rails. By controlling the movement of the second gear on the positioning double-sided rack, the second filter screen can be closed or opened.

[0070] Based on the structure of this return air vent filter assembly, four different levels of filtration can be achieved for the air passing through the return air vent. When both the first and second filters are open, it is an unfiltered state, and no air is filtered. When the first filter is closed and the second filter is open, it is a coarse filtration state, with a lower degree of air filtration. When the first filter is open and the second filter is closed, it is a fine filtration state, with a higher degree of air filtration, capable of filtering out most of the oil fumes in the air. When both the first and second filters are closed, it is a strong filtration state, with the highest degree of air filtration, capable of filtering out the vast majority of oil fumes in the air, but also with the greatest air resistance.

[0071] See Figure 4 The diagram shows a structural schematic of an embodiment of the device of the present invention. The control device for the air conditioner may include: an acquisition unit 102 and a control unit 104.

[0072] The acquisition unit 102 is configured to acquire the relative air pressure of the indoor space and the relative air pressure within the ceiling when the air conditioner is running. The specific functions and processing of the acquisition unit 102 are described in step S110.

[0073] Two pressure sensors can be installed. The first pressure sensor acquires air pressure data from the kitchen space, representing the relative pressure of the kitchen air conditioner relative to one atmosphere. When the pressure is negative, it indicates that outside air is being drawn into the kitchen space. The larger the absolute value, the stronger the suction. In a residential kitchen, this means that the range hood and kitchen air conditioner are removing more airflow. The second pressure sensor acquires air pressure data from the ceiling space, representing the relative pressure within the ceiling space relative to one atmosphere.

[0074] Control unit 104 is configured to control the opening and closing states of the first filter layer and the second filter layer respectively according to the relative air pressure in the room; and to control the speed of the first fan and the second fan according to the relative air pressure in the room and the relative air pressure in the ceiling. The specific functions and processing of this control unit 104 are described in step S120.

[0075] When the first or second filter layer is closed, the ability to filter oil fumes in the air is enhanced, but the air intake resistance when the return air vent enters the indoor space is also increased. The air volume obtained by the evaporator and condenser sides of the air conditioner is reduced. Therefore, it is necessary to adjust the speed of the first and second fans accordingly to ensure that the air conditioner obtains enough air for heat exchange and to ensure the normal operation of the air conditioner.

[0076] In some embodiments, the control unit 104 controls the opening and closing states of the first filter layer and the second filter layer respectively according to the relative air pressure in the room, including:

[0077] The control unit 104 is further configured to determine the relative air pressure range of the room. The specific functions and processing of the control unit 104 are described in step S210.

[0078] The control unit 104 is further configured to close the first filter layer and the second filter layer respectively if the relative air pressure in the room is within a first air pressure range. The specific functions and processing of the control unit 104 are described in step S220.

[0079] The first pressure range is defined as a pressure less than -15 Pa. When the indoor relative pressure falls within this range, it indicates significant kitchen fumes, the user has turned on the range hood or kitchen air conditioner, and the range hood or air conditioner is drawing a large amount of air from the room, resulting in substantial airflow loss and low indoor relative pressure. Therefore, to prevent significant fumes from polluting the air conditioner's interior, both the first and second filter layers must be closed simultaneously to effectively filter the fumes entering the ceiling, thus preventing fumes from entering the air conditioner through the evaporator and condenser side inlets.

[0080] The control unit 104 is further configured to open the first filter layer and close the second filter layer if the relative air pressure in the room is within the second air pressure range. The specific functions and processing of the control unit 104 are described in step S230.

[0081] The second pressure range is between -15Pa and -10Pa. Within this range, the kitchen range hood is considered to be operating at low power. Although oil fumes are present in the air, their concentration is low. Therefore, the second filter layer is activated while the first filter layer is turned on. This maintains the filtration of oil fumes while preventing excessive resistance when the ceiling draws air from the room.

[0082] The control unit 104 is further configured to close the first filter layer and open the second filter layer if the relative air pressure in the room is within the third air pressure range. The specific functions and processing of the control unit 104 are described in step S240.

[0083] The third pressure range is greater than -10Pa. When the relative air pressure in the room is within the third pressure range, the range hood is considered to be on. At this time, only the first filter layer needs to be turned on for filtration, and the air intake from the return air vent is also relatively small.

[0084] Figure 8 This is a schematic flowchart of an embodiment of the air conditioner return air filtration control method of the present invention, as shown below. Figure 8 As shown, the control method of the present invention includes:

[0085] Step 1: After the kitchen air conditioner is turned on, the first air pressure sensor is used to detect the relative air pressure in the kitchen space, and the second air pressure sensor is used to detect the relative air pressure in the ceiling space. Then, steps 2 and 3 are executed respectively.

[0086] Step 2: Determine the relative air pressure range of the kitchen space. If the relative air pressure is less than -15Pa, it is assumed that the range hood is operating at high power and cooking with a lot of smoke is taking place in the kitchen. In this case, the first and second filters are closed simultaneously to activate the strong filtration mode. If the relative air pressure is between -15Pa and -10Pa, it is assumed that the range hood is operating at low power and cooking with a little smoke is taking place in the kitchen. In this case, the first filter is opened and the second filter is closed to activate the second filtration mode. If the relative air pressure is greater than -10Pa, it is assumed that the range hood is off, cooking is not taking place in the kitchen, and no smoke is generated. In this case, the second filter is opened and the first filter is closed to activate the second filtration mode.

[0087] In some embodiments, the control unit 104 controls the rotational speeds of the first fan and the second fan based on the relative air pressure in the room and the relative air pressure in the ceiling, including:

[0088] The control unit 104 is further configured to determine the pressure range of the relative air pressure in the room; and to determine the pressure range of the pressure difference between the relative air pressure in the room and the relative air pressure in the ceiling. The specific functions and processing of the control unit 104 are described in step S310.

[0089] The relative air pressure range within the room includes a first pressure range of less than -15 Pa, a second pressure range of -15 Pa to -10 Pa, and a third pressure range of greater than -10 Pa. The pressure difference between the relative air pressure inside the room and the relative air pressure within the ceiling includes a fourth pressure range of greater than 10 Pa, a fifth pressure range of 10 Pa to 5 Pa, and a sixth pressure range of less than 5 Pa.

[0090] Integrated ceiling-mounted air conditioners are installed within the ceiling space. The evaporator and condenser sides of the air conditioner draw air from the ceiling space. As the air conditioner operates, it continuously blows air from the ceiling space to the indoor or outdoor environment, creating a negative pressure environment within the ceiling space. Because the air pressure in the kitchen is relatively high, the airflow is forced into the ceiling space through the return air vent. Therefore, the pressure difference between the relative air pressure indoors and the relative air pressure inside the ceiling indicates the pressure of air entering the ceiling space from the indoor space. When the pressure difference is large, it means the air pressure entering the ceiling space from the indoor space is strong. In this case, air will not only flow into the ceiling space through the return air vent but also through gaps in the ceiling. However, since gaps cannot filter cooking fumes, fumes entering the ceiling space through these gaps will contaminate the air conditioner itself, corrode structural components, cause structural damage, and are difficult to clean. If the humidity is high, it will also lead to increased condensation, exceeding the structural drainage capacity and causing leaks. Therefore, it is necessary to adjust the relative air pressure in the ceiling space to avoid an excessively small pressure difference.

[0091] The control unit 104 is further configured to determine the speed control coefficients of the first fan and the second fan based on the pressure range of the relative air pressure in the room and the pressure range of the pressure difference. The specific functions and processing of this control unit 104 are described in step S320.

[0092] Specifically, the speed control coefficients of the first fan and the second fan can be determined based on the data given in Table 1.

[0093] A1 A2 A3 A4 A5 A6 A7 A8 A9 1 0.9 0.85 0.85 0.7 0.6 0.75 0.63 0.5 B1 B2 B3 B4 B5 B6 B7 B8 B9 1 0.95 0.9 0.9 0.86 0.8 0.85 0.8 0.76

[0094] Table 1 Speed ​​Control Coefficients

[0095] When the relative air pressure in the room is in the first air pressure range and the air pressure difference is in the fourth air pressure range, the speed control coefficient of the first fan is A1 and the speed control coefficient of the second fan is B1; when the relative air pressure in the room is in the first air pressure range and the air pressure difference is in the fifth air pressure range, the speed control coefficient of the first fan is A2 and the speed control coefficient of the second fan is B2; when the relative air pressure in the room is in the first air pressure range and the air pressure difference is in the sixth air pressure range, the speed control coefficient of the first fan is A3 and the speed control coefficient of the second fan is B3. When the relative air pressure in the room is in the second pressure range and the pressure difference is in the fourth pressure range, the speed control coefficient of the first fan is A4 and the speed control coefficient of the second fan is B4; when the relative air pressure in the room is in the second pressure range and the pressure difference is in the fifth pressure range, the speed control coefficient of the first fan is A5 and the speed control coefficient of the second fan is B5; when the relative air pressure in the room is in the second pressure range and the pressure difference is in the sixth pressure range, the speed control coefficient of the first fan is A6 and the speed control coefficient of the second fan is B6. When the relative air pressure in the room is in the third air pressure range and the air pressure difference is in the fourth air pressure range, the speed control coefficient of the first fan is A7 and the speed control coefficient of the second fan is B7; when the relative air pressure in the room is in the third air pressure range and the air pressure difference is in the fifth air pressure range, the speed control coefficient of the first fan is A8 and the speed control coefficient of the second fan is B8; when the relative air pressure in the room is in the third air pressure range and the air pressure difference is in the sixth air pressure range, the speed control coefficient of the first fan is A9 and the speed control coefficient of the second fan is B9.

[0096] The control unit 104 is further configured to determine the current speed of the first fan and the current speed of the second fan based on the speed control coefficients and maximum speeds of the first fan and the second fan, respectively. The specific functions and processing of the control unit 104 are described in step S330.

[0097] After determining the speed control coefficient of the first fan, the maximum speed R1 of the first fan is... MAX Based on this, multiply by the speed control coefficient of the first fan to obtain the current speed of the first fan. For example, if the speed control coefficient of the first fan is A1, then the current speed of the first fan = A1 * R1 MAX After determining the speed control coefficient of the second fan, the maximum speed R2 of the second fan is... MAX Based on the first fan speed, multiply by the speed control coefficient of the second fan to obtain the current speed of the second fan. For example, if the speed control coefficient of the second fan is B1, then the current speed of the first fan = B1 * R2 MAX .

[0098] When the relative air pressure indoors is in the first pressure range, both the first and second filter layers are closed, and the air intake resistance at the return air vent is at its maximum. Therefore, to ensure sufficient air intake for the air conditioner, the corresponding speed control coefficients A1, A2, A3, B1, B2, and B3 are all relatively large, resulting in relatively large speed values. This allows more air to enter the ceiling space through the return air vent, preventing prolonged large pressure differences from causing cooking fumes to enter the ceiling space through gaps. Similarly, when the relative air pressure indoors is in the second or third pressure range, the air intake resistance at the return air vent gradually decreases due to the operation of the first and second filter layers, thus the corresponding speed control coefficients also gradually decrease.

[0099] When the air pressure difference is in the fourth pressure range, the pressure difference is relatively large, and cooking fumes can enter the ceiling space through the gaps in the ceiling. Therefore, to avoid this and to ensure sufficient air intake for the air conditioner, the speed control coefficient is relatively large, and the fan runs at a higher speed to reduce the air pressure difference as quickly as possible. For example, when the indoor relative air pressure is in the first pressure range, if the air pressure difference is in the fourth pressure range, the control coefficient of the first fan is the maximum A1, where A1 corresponds to a coefficient of 1, and the corresponding speed of the first fan is the maximum speed R1. MAX Similarly, when the pressure difference is in the fifth or sixth pressure range, the pressure difference gradually decreases, so the corresponding speed control coefficient also gradually decreases.

[0100] The control unit 104 is further configured to control the first fan and the second fan to operate at their respective current speeds. The specific functions and processing of the control unit 104 are described in step S340.

[0101] This solution combines the control of the opening and closing of the filter layer with the control of the fan speed. While effectively filtering oil fumes, it also adjusts the air pressure in the ceiling space to avoid an excessive pressure difference between the ceiling space and the indoor space. This prevents oil fumes from entering the ceiling space through gaps, while ensuring the air intake of the air conditioner so that it can cool normally.

[0102] like Figure 8 As shown, the control method of the present invention further includes:

[0103] Step 3: Calculate the pressure difference between the relative air pressure in the kitchen space and the relative air pressure in the ceiling space, and determine the range of the relative air pressure in the kitchen space. If the relative air pressure is less than -15 Pa, proceed to step 4; if the relative air pressure is between -15 Pa and -10 Pa, proceed to step 5; if the relative air pressure is greater than -10 Pa, proceed to step 6.

[0104] Step 4: Determine the range of the pressure difference. If the pressure difference is greater than 10 Pa, control the speed of the internal fan on the evaporator side to R1 = A1 * R1.MAX Control the speed of the external fan on the condenser side: R2 = B1 * R2 MAX If the pressure difference is between 5 Pa and 10 Pa, then the speed of the internal fan on the evaporator side should be controlled as R1 = A2 * R1. MAX Control the speed of the external fan on the condenser side: R2 = B2 * R2 MAX If the pressure difference is less than 5 Pa, then control the speed of the internal fan on the evaporator side to R1 = A3 * R1 MAX Control the speed of the external fan on the condenser side: R2 = B3 * R2 MAX .

[0105] Step 5: Determine the range of the pressure difference. If the pressure difference is greater than 10 Pa, control the speed of the internal fan on the evaporator side to R1 = A4 * R1. MAX Control the speed of the outdoor fan on the condenser side: R2 = B4 * R2 MAX If the pressure difference is between 5 Pa and 10 Pa, then control the internal fan speed on the evaporator side as R1 = A5 * R1 MAX Control the speed of the outdoor fan on the condenser side: R2 = B5 * R2 MAX If the pressure difference is less than 5 Pa, then control the speed of the internal fan on the evaporator side to R1 = A6 * R1 MAX Control the speed of the outdoor fan on the condenser side: R2 = B6 * R2 MAX .

[0106] Step 6: Determine the range of the pressure difference. If the pressure difference is greater than 10 Pa, control the speed of the internal fan on the evaporator side to R1 = A7 * R1. MAX Control the speed of the outdoor fan on the condenser side: R2 = B7 * R2 MAX If the pressure difference is between 5 Pa and 10 Pa, then the speed of the internal fan on the evaporator side should be controlled as R1 = A8 * R1. MAX Control the speed of the outdoor fan on the condenser side: R2 = B8 * R2 MAX If the pressure difference is less than 5 Pa, then control the speed of the internal fan on the evaporator side to R1 = A9 * R1 MAX Control the speed of the outdoor fan on the condenser side: R2 = B9 * R2 MAX .

[0107] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0108] The technical solution of this invention involves installing a return air vent filter assembly with a first filter layer and a second filter layer having different filtration capabilities at the return air vent in the ceiling. During air conditioning operation, the opening and closing states of the first and second filter layers are controlled according to the relative air pressure in the room. Furthermore, the speed of the first fan on the evaporator side and the speed of the second fan on the condenser side are controlled based on the relative air pressure in the room and the relative air pressure within the ceiling. By controlling the opening and closing states of the filter layers and the speeds of the first and second fans, the air pressure within the ceiling space is adjusted while effectively filtering oil fumes, ensuring sufficient air intake and exhaust volume for the air conditioner, guaranteeing its cooling performance, and improving the user experience.

[0109] According to an embodiment of the present invention, an air conditioner corresponding to an air conditioner control device is also provided. This air conditioner may include the air conditioner control device described above.

[0110] Since the processing and functions implemented by the air conditioner in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned device, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0111] The technical solution of this invention involves installing a return air vent filter assembly with a first filter layer and a second filter layer having different filtration capabilities at the return air vent in the ceiling. During air conditioning operation, the opening and closing states of the first and second filter layers are controlled according to the relative air pressure in the room. Furthermore, the speed of the first fan on the evaporator side and the speed of the second fan on the condenser side are controlled based on the relative air pressure in the room and the relative air pressure within the ceiling. By controlling the opening and closing states of the filter layers and the speeds of the first and second fans, the air pressure within the ceiling space is adjusted while effectively filtering oil fumes, ensuring sufficient air intake and exhaust volume for the air conditioner, guaranteeing its cooling performance, and improving the user experience.

[0112] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, the storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the air conditioner control method described above when it is executed.

[0113] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0114] The technical solution of this invention involves installing a return air vent filter assembly with a first filter layer and a second filter layer having different filtration capabilities at the return air vent in the ceiling. During air conditioning operation, the opening and closing states of the first and second filter layers are controlled according to the relative air pressure in the room. Furthermore, the speed of the first fan on the evaporator side and the speed of the second fan on the condenser side are controlled based on the relative air pressure in the room and the relative air pressure within the ceiling. By controlling the opening and closing states of the filter layers and the speeds of the first and second fans, the air pressure within the ceiling space is adjusted while effectively filtering oil fumes, ensuring sufficient air intake and exhaust volume for the air conditioner, guaranteeing its cooling performance, and improving the user experience.

[0115] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0116] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that, The air conditioner is an integrated unit installed in the ceiling. A return air vent is provided on the ceiling for drawing air from the indoor space into the ceiling space. The air conditioner includes an evaporator side and a condenser side. A first fan is installed on the evaporator side, and a second fan is installed on the condenser side. A return air vent filter assembly is provided at the return air vent. The return air vent filter assembly includes a first filter layer and a second filter layer. The first and second filter layers can be closed or opened respectively. When closed, they can filter the air flowing through the return air vent; when open, they do not filter the air flowing through the return air vent. The second filter layer has a higher filtration capacity than the first filter layer. The method includes: When the air conditioner is running, the relative air pressure of the indoor space and the relative air pressure inside the ceiling are obtained; The opening and closing states of the first filter layer and the second filter layer are controlled according to the relative air pressure in the room; and the rotation speeds of the first fan and the second fan are controlled according to the relative air pressure in the room and the relative air pressure in the ceiling.

2. The air conditioning control method according to claim 1, characterized in that, Controlling the opening and closing states of the first filter layer and the second filter layer according to the relative air pressure in the room includes: Determine the air pressure range within which the relative air pressure of the room falls; If the relative air pressure in the room is within the first air pressure range, then the first filter layer and the second filter layer are closed respectively. If the relative air pressure in the room is within the second air pressure range, then the first filter layer is opened and the second filter layer is closed. If the relative air pressure in the room is in the third air pressure range, then the first filter layer is closed and the second filter layer is opened.

3. The control method of the air conditioner according to claim 1, characterized by, Controlling the rotational speeds of the first and second fans based on the relative air pressure inside the room and the relative air pressure within the ceiling includes: Determine the air pressure range in which the relative air pressure in the room is located; and determine the air pressure range in which the air pressure difference between the relative air pressure in the room and the relative air pressure in the ceiling is located; Based on the pressure range of the relative air pressure in the room and the pressure range of the pressure difference, the speed control coefficients of the first fan and the second fan are determined respectively. The current speed of the first fan and the current speed of the second fan are determined based on the speed control coefficient and maximum speed of the first fan and the second fan, respectively. The first fan and the second fan are respectively controlled to operate at their respective current speeds.

4. A control device of an air conditioner, characterized by comprising: The air conditioner is an integrated unit installed in the ceiling. A return air vent is provided on the ceiling for drawing air from the indoor space into the ceiling space. The air conditioner includes an evaporator side and a condenser side. A first fan is installed on the evaporator side, and a second fan is installed on the condenser side. A return air vent filter assembly is provided at the return air vent. The return air vent filter assembly includes a first filter layer and a second filter layer. The first and second filter layers can be closed or opened respectively. When closed, they can filter the air flowing through the return air vent; when open, they do not filter the air flowing through the return air vent. The second filter layer has a higher filtration capacity than the first filter layer. The device includes: The acquisition unit is configured to acquire the relative air pressure of the indoor space and the relative air pressure inside the ceiling when the air conditioner is running; The control unit is configured to control the opening and closing states of the first filter layer and the second filter layer respectively according to the relative air pressure in the room; and to control the speed of the first fan and the second fan according to the relative air pressure in the room and the relative air pressure in the ceiling.

5. The control apparatus of the air conditioner according to claim 4, wherein The control unit controls the opening and closing states of the first filter layer and the second filter layer respectively according to the relative air pressure in the room, including: Determine the air pressure range within which the relative air pressure of the room falls; If the relative air pressure in the room is within the first air pressure range, then the first filter layer and the second filter layer are closed respectively. If the relative air pressure in the room is in the second air pressure range, then the first filter layer is opened and the second filter layer is closed. If the relative air pressure in the room is in the third air pressure range, then the first filter layer is closed and the second filter layer is opened.

6. The control apparatus of the air conditioner according to claim 4, wherein The control unit controls the rotational speeds of the first and second fans based on the relative air pressure inside the room and the relative air pressure within the ceiling, including: Determine the air pressure range in which the relative air pressure in the room is located; and determine the air pressure range in which the air pressure difference between the relative air pressure in the room and the relative air pressure in the ceiling is located; Based on the pressure range of the relative air pressure in the room and the pressure range of the pressure difference, the speed control coefficients of the first fan and the second fan are determined respectively. The current speed of the first fan and the current speed of the second fan are determined based on the speed control coefficient and maximum speed of the first fan and the second fan, respectively. The first fan and the second fan are respectively controlled to operate at their respective current speeds.

7. An air conditioner characterized by comprising: include: The control device for an air conditioner as described in any one of claims 4 to 6.

8. A storage medium, characterized by The storage medium includes a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the air conditioning control method according to any one of claims 1 to 3.

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