Air conditioners and their control methods

Abstract

This invention provides an air conditioner and its control method. The air conditioner includes: a body with a first air outlet and a second air outlet; an air guiding mechanism is respectively provided at the first air outlet and / or the second air outlet, at least a portion of which is rotatably configured to block or avoid airflow at the first air outlet and / or the second air outlet; and a pressure detection module, located within the body and signal-connected to the air guiding mechanism, which calculates the pressure difference between the first and second air outlets and controls the rotation stroke of the air guiding mechanism based on the pressure difference. This application solves the problem in existing reversible air conditioners where filter blockage during operation leads to unstable airflow and surging.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioner and its control method. Background Technology

[0002] With the development of wall-mounted air conditioner technology, the comfort function of air conditioners is receiving increasing attention. Traditional wall-mounted air conditioners use cross-flow fans to achieve bottom airflow, which has problems such as direct airflow onto people, incomplete air circulation, and weak heat exchange capacity. To address these issues, air conditioners with reversible airflow have been designed, allowing air to rise and blow towards the ceiling when cooling, and to sink and blow towards the floor when heating.

[0003] Existing technology achieves two air outlet modes—top air intake and bottom air outlet, and bottom air intake and top air outlet—by regulating the flow field resistance within the cross-flow fan, thereby achieving a large air circulation effect in the room.

[0004] However, the above-mentioned air outlet mode requires a high resistance difference between the two air outlets. When the filter becomes dirty and clogged, it will cause a large change in the resistance on one side, which will make the flow field unstable, causing the air conditioner to surge or the air volume to decrease significantly, which will have an adverse effect on the air circulation in the room. Summary of the Invention

[0005] The main objective of this invention is to provide an air conditioner and its control method to solve the problem of unstable airflow caused by filter blockage in existing reversible air conditioners, which leads to surging in the air conditioner.

[0006] To achieve the above objectives, according to one aspect of the present invention, an air conditioner is provided, comprising: a body, on which a first air vent and a second air vent are provided; an air guiding mechanism is respectively provided at the first air vent and / or the second air vent, at least a portion of the air guiding mechanism being rotatably configured to block or avoid airflow at the first air vent and / or the second air vent; and a pressure detection module, disposed within the body and signal-connected to the air guiding mechanism, for obtaining the pressure difference between the first air vent and the second air vent through the pressure detection module, and controlling the rotation stroke of the air guiding mechanism according to the pressure difference.

[0007] Furthermore, the pressure detection module includes: a first pressure detection component, disposed at the first air outlet, for detecting a first pressure value at the first air outlet; a second pressure detection component, disposed at the second air outlet, for detecting a second pressure value at the second air outlet; and a data processing unit, wherein the first pressure detection component and the second pressure detection component are respectively signal-connected to the data processing unit, and the data processing unit calculates a pressure difference value based on the first pressure value and the second pressure value.

[0008] Furthermore, the air guiding mechanism includes: a first air guiding assembly, disposed at the first air outlet, the first air guiding assembly including a first air guiding component and a second air guiding component, the first air guiding component and the second air guiding component being arranged sequentially along the width direction of the body;

[0009] The first air guide component and the second air guide component are rotatably mounted.

[0010] Furthermore, the body includes a mounting surface and an exterior surface that are arranged opposite to each other; the first air guide component is located on the side of the first air outlet closer to the mounting surface, and the second air guide component is located on the side of the first air guide component closer to the exterior surface;

[0011] At least a portion of the second air guide component extends along the first arcuate trajectory.

[0012] Furthermore, the air guiding mechanism also includes: a second air guiding assembly, which is disposed at the second air outlet. The second air guiding assembly includes a third air guiding component and a fourth air guiding component, which are arranged sequentially along the width direction of the machine body.

[0013] The third and fourth air guide components are rotatably mounted.

[0014] Furthermore, the body includes a mounting surface and an exterior surface that are positioned opposite each other;

[0015] The third air guide component is located on the side of the second air outlet closer to the mounting surface, and the fourth air guide component is located on the side of the third air guide component closer to the exterior surface.

[0016] At least a portion of the fourth air guide component extends along the first arcuate trajectory.

[0017] According to another aspect of the present invention, a control method for an air conditioner is provided, applicable to the aforementioned air conditioner, wherein either a first air vent or a second air vent is an air outlet, an air guiding mechanism is disposed at the air outlet, and the control method includes:

[0018] Establish the pressure difference threshold between the first and second air inlets;

[0019] Detect the actual pressure difference ΔP between the first air outlet and the second air outlet;

[0020] Compare the actual pressure difference ΔP with the pressure difference threshold;

[0021] Based on the comparison results, the air guide mechanism can be controlled to rotate within a predetermined angle range, or the fan speed of the air conditioner can be adjusted, or a warning of filter clogging can be issued.

[0022] Furthermore, establishing the pressure difference threshold between the first and second air inlets includes:

[0023] Construct the fan operating speed threshold for the air conditioner. The fan operating speed threshold includes a first speed threshold R1, a second speed threshold R2, and a third speed threshold R3 that gradually decrease.

[0024] Based on each speed threshold, the pressure difference thresholds include a first pressure difference threshold △P1, a second pressure difference threshold △P2, and a third pressure difference threshold △P3.

[0025] Furthermore, when the fan operating speed threshold is at the first speed threshold R1, and ΔP < k*ΔP1; the control method also includes:

[0026] Control the air guide mechanism to rotate at a first preset angle so that the air guide mechanism blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner;

[0027] Where k is a constant.

[0028] Furthermore, the control method also includes controlling the air guide mechanism to rotate at a first preset angle;

[0029] Compare the actual pressure difference ΔP with the first pressure difference threshold ΔP1;

[0030] When △P < k*△P1, a filter clogging warning is issued.

[0031] Furthermore, when the air conditioner fan operates at the second speed threshold R2, and ΔP < k*ΔP2, the control method also includes:

[0032] The operating speed of the air conditioner's fan is increased from the second speed threshold R2 to the first speed threshold R1;

[0033] Where k is a constant.

[0034] Furthermore, when the operating speed of the air conditioner's fan is increased from the second speed threshold R2 to the first speed threshold R1, and ΔP < k*ΔP2, the control method further includes:

[0035] The air guide mechanism is controlled to rotate at a second preset angle, so that the air guide mechanism blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner.

[0036] Furthermore, when the fan operating speed threshold is at the third speed threshold R3, and ΔP < k*ΔP3; the control method also includes:

[0037] The operating speed of the air conditioner's fan is increased from the third speed threshold R3 to the second speed threshold R2.

[0038] Furthermore, when the operating speed of the air conditioner fan is increased from the third speed threshold R3 to the second speed threshold R2, and ΔP < k*ΔP3, the control method further includes: increasing the operating speed of the air conditioner fan from the second speed threshold R2 to the first speed threshold R1;

[0039] Where k is a constant.

[0040] Furthermore, when the operating speed of the air conditioner fan is increased from the second speed threshold R2 to the first speed threshold R1, and △P < k*△P3, the control method further includes: controlling the air guide mechanism to rotate at a third preset angle so that the air guide mechanism blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner.

[0041] According to the technical solution of this invention, an air conditioner includes a body with a first air vent and a second air vent. An air guiding mechanism is respectively provided at the first air vent and / or the second air vent, at least a portion of which is rotatably configured to block or avoid airflow at the first air vent and / or the second air vent. A pressure detection module is located within the body and is signal-connected to the air guiding mechanism. The pressure detection module detects the pressure difference between the first air vent and the second air vent and controls the rotation stroke of the air guiding mechanism based on the pressure difference. By detecting the pressure difference between the first air vent and the second air vent, the air pressure at the first air vent and the second air vent is monitored in real time. When a significant change in the pressure difference between the first air vent and the second air vent affects the normal airflow of the air conditioner, the rotation stroke of the air guiding mechanism is controlled based on the detected pressure difference to adjust the flow cross-sectional area of ​​the airflow at the first air vent and / or the second air vent. This achieves the purpose of adjusting the pressure difference between the first air vent and the second air vent, ensuring a stable airflow field and normal circulation, and avoiding problems such as surge or significant reduction in airflow in the air conditioner. Attached Figure Description

[0042] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0043] Figure 1 A schematic diagram of an embodiment of an air conditioner according to the present invention is shown;

[0044] Figure 2 A schematic diagram of the first air outlet state of the air conditioner according to the present invention is shown;

[0045] Figure 3 A schematic diagram of the second air outlet state of the air conditioner according to the present invention is shown;

[0046] Figure 4A schematic diagram of the first position of the second air guide assembly when the air conditioner according to the present invention is in the first air outlet state is shown;

[0047] Figure 5 A schematic diagram showing the second position of the second air guide assembly when the air conditioner according to the present invention is in the first air outlet state is shown;

[0048] Figure 6 A schematic diagram of the third position of the second air guide assembly when the air conditioner according to the present invention is in the first air outlet state is shown;

[0049] Figure 7 A schematic diagram of the first position of the first air guide assembly when the air conditioner according to the present invention is in the second air outlet state is shown.

[0050] Figure 8 A schematic diagram showing the second position of the first air guide assembly when the air conditioner according to the present invention is in the second air outlet state is shown;

[0051] Figure 9 A schematic diagram of the third position of the first air guide assembly when the air conditioner according to the present invention is in the second air outlet state is shown;

[0052] Figure 10 A first flowchart of a control method for an air conditioner according to the present invention is shown;

[0053] Figure 11 A second flowchart of the control method for an air conditioner according to the present invention is shown.

[0054] The above figures include the following reference numerals:

[0055] 100. Body; 110. First air vent; 120. Second air vent; 130. Mounting surface; 140. Exterior surface; 200. Air guiding mechanism; 210. First air guiding assembly; 211. First air guiding component; 212. Second air guiding component; 220. Second air guiding assembly; 221. Third air guiding component; 222. Fourth air guiding component; 300. Filter screen; 310. First filter screen; 320. Second filter screen; 400. Fan. Detailed Implementation

[0056] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] As mentioned in the background section, existing wall-mounted air conditioners use two reversible air vents (upper and lower) to adapt to different user needs. The condition for reversible airflow from these two vents is that the resistance difference between them must reach a predetermined value. When the air filter becomes clogged, the resistance of the corresponding vent changes, leading to airflow instability. Therefore, the air conditioner provided in this application incorporates a pressure detection module within the unit 100 to detect the pressure difference between the first air vent 110 and the second air vent 120. Based on this pressure difference, the module controls the rotation stroke of the air guide mechanism 200, thereby adjusting the airflow cross-sectional area and changing the inflow or outflow resistance. This regulates the pressure difference between the first air vent 110 and the second air vent 120, preventing surge phenomena caused by pressure difference changes and promoting better indoor airflow circulation.

[0058] Please refer to Figures 1 to 9 This application provides an air conditioner, including: a body 100, on which a first air vent 110 and a second air vent 120 are provided; an air guiding mechanism 200 is respectively provided at the first air vent 110 and / or the second air vent 120, at least a portion of the air guiding mechanism 200 is rotatably arranged to block or avoid the airflow at the first air vent 110 and / or the second air vent 120; a pressure detection module is disposed in the body 100 and is signal-connected to the air guiding mechanism 200, the pressure detection module obtains the pressure difference between the first air vent 110 and the second air vent 120, and controls the rotation stroke of the air guiding mechanism 200 according to the pressure difference.

[0059] The air conditioner provided in this application includes a body 100, on which a first air vent 110 and a second air vent 120 are provided; an air guiding mechanism 200 is respectively provided at the first air vent 110 and / or the second air vent 120, at least a portion of the air guiding mechanism 200 is rotatably provided to block or avoid the airflow at the first air vent 110 and / or the second air vent 120; a pressure detection module is provided inside the body 100 and is signal-connected to the air guiding mechanism 200, the pressure detection module detects the pressure difference between the first air vent 110 and the second air vent 120, and controls the rotation stroke of the air guiding mechanism 200 according to the pressure difference. The pressure difference between the first air vent 110 and the second air vent 120 is detected by the pressure detection module to monitor the air pressure at the first air vent 110 and the second air vent 120 in real time. When the pressure difference between the first air vent 110 and the second air vent 120 changes significantly and affects the normal air output of the air conditioner, the rotation stroke of the air guide mechanism 200 is controlled according to the detected pressure difference to adjust the flow cross-sectional area of ​​the airflow at the first air vent 110 and / or the second air vent 120. This achieves the purpose of adjusting the pressure difference between the first air vent 110 and the second air vent 120, so as to ensure the stability of the airflow field and normal circulation, and avoid problems such as surge or significant reduction in air volume in the air conditioner.

[0060] Specifically, the pressure detection module includes: a first pressure detection component, disposed at the first air outlet 110, to detect a first pressure value at the first air outlet 110; a second pressure detection component, disposed at the second air outlet 120, to detect a second pressure value at the second air outlet 120; and a data processing unit, wherein the first and second pressure detection components are respectively signal-connected to the data processing unit, and the data processing unit calculates the pressure difference based on the first pressure value P1 and the second pressure value P2. △P=|P1-P2| Preferably, the first and second pressure detection components are wind pressure sensors.

[0061] In the specific implementation process, such as Figures 1 to 3 As shown, the air guiding mechanism 200 includes a first air guiding assembly 210, disposed at the first air outlet 110. The first air guiding assembly 210 includes a first air guiding component 211 and a second air guiding component 212, which are arranged sequentially along the width direction of the body 100. The first air guiding component 211 and the second air guiding component 212 are rotatably disposed. By rotating the first air guiding component 211 and the second air guiding component 212 respectively, the airflow at the first air outlet 110 is blocked or avoided, thereby adjusting the cross-sectional area of ​​the airflow at the first air outlet 110.

[0062] Furthermore, the body 100 includes a mounting surface 130 and an exterior surface 140 disposed opposite to each other; a first air guide component 211 is located on the side of the first air outlet 110 near the mounting surface 130, and a second air guide component 212 is located on the side of the first air guide component 211 near the exterior surface 140; at least a portion of the second air guide component 212 extends along a first arcuate trajectory. In actual use, in order to make the second air guide component 212 fit more tightly with the exterior surface 140 when closed, and at the same time optimize the appearance of the body 100, at least a portion of the second air guide component 212 extends along the first arcuate trajectory.

[0063] In the embodiments provided in this application, the air guiding mechanism 200 further includes a second air guiding assembly 220, disposed at the second air outlet 120. The second air guiding assembly 220 includes a third air guiding component 221 and a fourth air guiding component 222, which are sequentially arranged along the width direction of the body 100. The third air guiding component 221 and the fourth air guiding component 222 are rotatably disposed. By rotating the third air guiding component 221 and the fourth air guiding component 222 respectively, the airflow at the second air outlet 120 is blocked or avoided, thereby adjusting the cross-sectional area of ​​the airflow at the second air outlet 120.

[0064] Furthermore, the body 100 includes a mounting surface 130 and an exterior surface 140 disposed opposite to each other; a third air guide component 221 is located on the side of the second air outlet 120 near the mounting surface 130, and a fourth air guide component 222 is located on the side of the third air guide component 221 near the exterior surface 140; at least a portion of the fourth air guide component 222 extends along a first arcuate trajectory. In actual use, in order to make the fourth air guide component 222 fit more tightly with the exterior surface 140 when closed, and at the same time optimize the appearance of the body 100, at least a portion of the fourth air guide component 222 extends along a second arcuate trajectory.

[0065] It should be noted here that the width direction of the body 100 is from the mounting surface 130 to the outer surface 140. The flow cross-sectional area in this application refers to the projected area of ​​the first air vent 110 or the second air vent 120 on the horizontal plane.

[0066] like Figure 10 and Figure 11 As shown, this application also provides a control method for an air conditioner, applicable to the air conditioner of the above embodiments, wherein either the first air outlet 110 or the second air outlet 120 is an air outlet, and the air guiding mechanism 200 is disposed at the air outlet. The control method includes:

[0067] Establish the pressure difference threshold between the first air outlet 110 and the second air outlet 120;

[0068] Detect the actual pressure difference ΔP between the first air outlet 110 and the second air outlet 120;

[0069] Compare the actual pressure difference ΔP with the pressure difference threshold;

[0070] Based on the comparison results, the air guide mechanism 200 is controlled to rotate within a predetermined angle range, or the fan speed of the air conditioner is adjusted, or a warning of filter clogging is issued.

[0071] According to the control method of the air conditioner provided in this application, the actual pressure difference ΔP is compared with a pressure difference threshold. Based on the comparison result, the rotation angle of the air guide mechanism 200 is controlled within a predetermined angle range, or the fan speed of the air conditioner is adjusted, or a filter clogging warning is issued. That is, after the filter becomes clogged, the rotation angle of the air guide mechanism 200 can be selectively controlled or the fan speed of the air conditioner can be adjusted to achieve normal air supply. In this way, even if the filter 300 is clogged to a certain extent, the air conditioner can still operate normally. Compared with the prior art, the control method of this application not only issues a filter clogging warning after detecting that the filter 300 is clogged, but also judges the degree of clogging based on the actual pressure difference ΔP between the first air outlet 110 and the second air outlet 120. By controlling the rotation angle of the air guide mechanism 200 or adjusting the fan speed of the air conditioner, the actual pressure difference ΔP between the first air outlet 110 and the second air outlet 120 can be adjusted, thus solving the problem of filter clogging affecting the air supply effect and avoiding the air conditioner from surging or a significant decrease in air volume.

[0072] The data processing unit contains a built-in program for calculating the differential pressure threshold, where the differential pressure threshold is Kρv. 2 / 2. Where ρ is the air density, v is the air velocity, v = Q / A, Q is the airflow rate, and A is the airflow area. Where v is the average air velocity under ideal pressure difference.

[0073] Specifically, constructing the pressure difference threshold between the first air outlet 110 and the second air outlet 120 includes: constructing the operating speed threshold of the air conditioner's fan 400, which includes a gradually decreasing first speed threshold R1, a second speed threshold R2, and a third speed threshold R3; based on each speed threshold, the corresponding pressure difference thresholds include a first pressure difference threshold ΔP1, a second pressure difference threshold ΔP2, and a third pressure difference threshold ΔP3. The first speed threshold R1 corresponds to the high fan speed, the second speed threshold R2 corresponds to the medium fan speed, and the third speed threshold R3 corresponds to the low fan speed. Different pressure difference thresholds are constructed according to different fan speeds to ensure the accuracy of air conditioner control. Since the airflow velocity v is different for high, medium, and low fan speeds, the pressure difference threshold = Kρv is used. 2 / 2, to obtain the first differential pressure threshold △P1, the second differential pressure threshold △P2 and the third differential pressure threshold △P3 corresponding to different windshields.

[0074] In this application, the actual pressure value P1 at the first air outlet 110 is detected by the first pressure detection component, and the actual pressure value P2 at the second air outlet 120 is detected by the second pressure detection component, where △P=∣P1-P2∣.

[0075] Specifically, when the fan operating speed threshold is at the first speed threshold R1, and ΔP < k*ΔP1, the control method further includes: controlling the air guide mechanism 200 to rotate at a first preset angle, so that the air guide mechanism 200 blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner. This setting increases the air pressure at the air outlet, while the pressure at the air inlet remains unchanged, thereby adjusting the actual pressure difference ΔP.

[0076] The control method also includes: controlling the air guide mechanism 200 to rotate at a first preset angle; comparing the actual pressure difference ΔP with the first pressure difference threshold ΔP1; and issuing a filter clogging warning when ΔP < k*ΔP1.

[0077] Furthermore, the actual pressure difference ΔP is compared with the first pressure difference threshold ΔP1; when ΔP < k*ΔP1, the second or fourth air guide component is controlled to be in a closed state, such as... Figure 6 and Figure 9 As shown, under this air outlet condition, if △P < k*△P1, a filter clogging warning will be issued.

[0078] In this application, when the air conditioner fan operates at a second speed threshold R2 and ΔP < k*ΔP2, the control method further includes: controlling the air conditioner fan speed to increase from the second speed threshold R2 to a first speed threshold R1. When the air conditioner fan operates at the second speed threshold R2 and ΔP < k*ΔP2, the fan speed is first adjusted to increase the airflow, thereby adjusting the actual pressure difference ΔP.

[0079] Furthermore, when the operating speed of the air conditioner's fan is increased from the second speed threshold R2 to the first speed threshold R1, and ΔP < k*ΔP2, the control method further includes: controlling the air guide mechanism 200 to rotate a second preset angle (e.g., Figure 5 and Figure 8 As shown, the air guide mechanism 200 blocks the air outlet to reduce the cross-sectional area of ​​the airflow from the air conditioner. By reducing the cross-sectional area of ​​the airflow, the pressure at the air outlet is increased.

[0080] Specifically, when the air guide mechanism 200 rotates to the second preset angle, and ΔP < k*ΔP2, the rotation angle of the air guide mechanism 200 is further adjusted to control the second or fourth air guide component to be in a closed state, such as... Figure 6 and Figure 9As shown, under this air outlet condition, if △P < k*△P2, a filter clogging warning will be issued.

[0081] In this application, when the fan operating speed threshold is at the third speed threshold R3, and ΔP < k*ΔP3, the control method further includes: controlling the air conditioner's fan operating speed to increase from the third speed threshold R3 to the second speed threshold R2. First, the fan speed is adjusted to increase the airflow, thereby regulating the actual pressure difference ΔP.

[0082] When the operating speed of the air conditioner's fan is increased from the third speed threshold R3 to the second speed threshold R2, and ΔP < k*ΔP3, the control method further includes: increasing the operating speed of the air conditioner's fan from the second speed threshold R2 to the first speed threshold R1. During this process, the air conditioner's fan speed is continuously adjusted, and the increasing fan speed leads to a continuous increase in airflow, thereby regulating the actual pressure difference ΔP.

[0083] Furthermore, when the operating speed of the air conditioner fan is increased from the second speed threshold R2 to the first speed threshold R1, and △P < k*△P3, the control method further includes: controlling the air guide mechanism 200 to rotate at a third preset angle so that the air guide mechanism 200 blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner.

[0084] Specifically, after controlling the air guide mechanism 200 to rotate by the third preset angle, if △P < k*△P3, then first control the air guide mechanism 200 to rotate by the fourth preset angle (e.g., Figure 5 and Figure 8 As shown), after the air conditioner has been running for a period of time, if ΔP is still less than k*ΔP3, then the second or fourth air guide component in the air guide mechanism 200 will close, as shown. Figure 6 and Figure 9 As shown, under this air outlet condition, if △P < k*△P3, a filter clogging warning will be issued.

[0085] In the embodiments provided in this application, such as Figure 11 As shown, the air conditioner includes a first air outlet mode and a second air outlet mode. In the first air outlet mode, air is introduced through the first air vent and discharged through the second air vent (air intake at the top and air discharge at the bottom). In the second air outlet mode, air is discharged through the first air vent and introduced through the second air vent (air discharge at the top and air intake at the bottom). The above control method can be used to control the air conditioner when it is running in either the first or second air outlet mode.

[0086] Specifically, in the theoretical design, the high wind speed R1 needs to satisfy △P≥△P1; the medium wind speed R2 needs to satisfy △P≥△P2; and the low wind speed R3 needs to satisfy △P≥△P3 in order to meet the flow requirements.

[0087] Existing technology achieves two airflow modes—top inlet and bottom outlet, and bottom inlet and top outlet—by controlling the flow field resistance within a cross-flow fan, thus achieving a large-scale air circulation effect in the room. However, this solution has high requirements for the resistance of the two air outlets. When the filter becomes clogged, it causes a significant change in resistance on one side, resulting in an unstable flow field, leading to problems such as surging or a substantial decrease in airflow, and also adversely affecting the organization and circulation of airflow in the room. Therefore, a filter clogging reminder and resistance control method for wall-mounted air conditioners with reversible top and bottom outlets is proposed. By installing air pressure monitoring sensors at both the top and bottom air outlets, it is determined whether the resistance of the top and bottom air outlets is within a reasonable range. When the resistance change reaches a certain critical range, a clogging reminder is sent to the user, and the fan speed (400 rpm) and the air guide plate are adjusted according to the pressure difference to regulate the air outlet resistance value. The specific implementation method is as follows:

[0088] In the top-intake, bottom-outtake mode, the first filter 310 is in operation, and the second filter 320 is retracted. At this time, the resistance of the second vent 120 must be greater than the resistance of the first vent 110, i.e., P2 ≤ P1, for airflow to flow from the top vent to the bottom vent. After a certain period of use, when the filter becomes clogged, the resistance coefficient of the first vent 110 increases, and the pressure P1 decreases. As the degree of clogging increases, ΔP gradually becomes insufficient to meet the design requirements of each wind deflector. Therefore, at the high wind deflector, when ΔP < kΔP1, a filter clogging warning is issued to the user; at the medium wind deflector, when ΔP < kΔP2, a filter clogging warning is issued; and at the low wind deflector, when ΔP < kΔP3, a filter clogging warning is issued.

[0089] In the current top-intake / top-outtake mode, the second filter 320 is active, while the first filter 310 is retracted. At this time, the resistance of the first vent 110 must be greater than the resistance of the second vent 120, i.e., P1 ≤ P2, for airflow to flow from the lower vent to the upper vent. After a certain period of use, when the filter becomes clogged, the resistance coefficient of the second vent 120 increases, and the pressure P2 decreases. As the degree of clogging increases, ΔP gradually fails to meet the design requirements of each wind deflector. Therefore, at the high wind deflector, when ΔP < kΔP1, a filter clogging warning is issued to the user; at the medium wind deflector, when ΔP < kΔP2, a filter clogging warning is issued; and at the low wind deflector, when ΔP < kΔP3, a filter clogging warning is issued.

[0090] The parameter values ​​are as follows: k≥1.1; preferably, △P1=[45pa,50pa]; △P2=[30pa,45pa]; △P3=[10pa,30pa].

[0091] For high windshield R1, ΔP ≥ ΔP1; for medium windshield R2, ΔP ≥ ΔP2; and for low windshield R3, ΔP ≥ ΔP3, to meet the flow requirements. When ΔP < kΔP1 at high windshield, ΔP < kΔP2 at medium windshield, and ΔP < kΔP3 at low windshield, the user is already alerted to filter clogging, but the user may not have replaced or cleaned the filter in time. Therefore, to address this issue, the pressure difference between the upper and lower air outlets is controlled by adjusting the air guide vane (changing the air outlet cross-sectional area) and the fan speed (changing the flow velocity), thereby ensuring stable switching of the upper and lower air outlet fan duct system.

[0092] The data processing unit is configured with P = Kρv 2 / 2, v=Q / A.

[0093] In the top-inlet, bottom-outlet mode, the first filter 310 is active, and the second filter 320 is retracted. At this time, P2 ≤ P1 must be satisfied for airflow to flow from the upper vent to the lower vent. When the first filter 310 is clogged, the resistance coefficient on the first vent 110 side increases, the pressure P1 decreases, and ΔP decreases. Therefore, the resistance coefficient on the second vent 120 side needs to be increased to maintain resistance balance. To increase ΔP, the resistance coefficient needs to be adjusted by increasing the flow velocity or decreasing the flow area.

[0094] First, the balance of ΔP is achieved by increasing the fan speed. However, there is a threshold for the fan speed, which cannot be exceeded. Therefore, the outlet area is adjusted by opening and closing the air guide vanes.

[0095] like Figures 4 to 6 As shown, the area of ​​air outlet Bb1 is Ab1, the area of ​​air outlet Bb2 is Ab2, and the area of ​​air outlet Bb3 is Ab3. Among them, Ab1>Ab2>Ab3, and Ab1≥nAb3, n=[0.4-0.6].

[0096] At low fan speed, when ΔP < k*ΔP3, first slowly increase the fan speed from R3 to R2. During this process, the flow velocity V gradually increases, and ΔP increases accordingly. If ΔP is still < k*ΔP3, continue increasing the speed to R1 until ΔP ≥ k*ΔP3.

[0097] At medium speed, when ΔP < k*ΔP2, first slowly increase the fan speed from R2 to R1. At this time, the flow velocity V gradually increases, and ΔP increases accordingly until ΔP ≥ k*ΔP3.

[0098] At high fan speed, when ΔP < k*ΔP1, the fan speed has reached the set threshold. Therefore, it is necessary to reduce the flow area of ​​the downdraft outlet to increase the downdraft resistance coefficient. First, adjust the air guide plate from Bb1 to Bb2. At this time, the outlet area A decreases, and ΔP increases accordingly. If ΔP is still < k*ΔP3, continue to adjust the air guide plate to Bb3 until ΔP ≥ k*ΔP3.

[0099] In the current top-intake / top-outtake mode, the second filter 320 is in operation, while the first filter 310 is retracted. At this time, P1 ≤ P2 must be satisfied for airflow to flow from the downwind vent to the upwind vent. When the first filter is clogged, the resistance coefficient on the first vent 110 side increases, and the pressure P2 decreases. Therefore, the resistance coefficient on the second vent 120 side needs to be increased to maintain resistance balance.

[0100] First, the balance of ΔP is achieved by increasing the fan speed. However, there is a threshold for the fan speed, which cannot be exceeded. Therefore, the outlet area is adjusted by opening and closing the air guide vanes.

[0101] like Figures 7 to 9 As shown, the area of ​​air outlet Aa1 is Aa1, the area of ​​air outlet Aa2 is Aa2, and the area of ​​air outlet Aa3 is Aa3. Where Aa1>Aa2>Aa3, and Aa1≥nAa3, n=[0.4-0.6].

[0102] At low fan speed, when ΔP < k*ΔP3, first slowly increase the fan speed from R3 to R2. During this process, the flow velocity V gradually increases, and ΔP increases accordingly. If ΔP is still < k*ΔP3, continue increasing the speed to R1 until ΔP ≥ k*ΔP3.

[0103] At medium speed, when ΔP < k*ΔP2, first slowly increase the fan speed from R2 to R1. At this time, the flow velocity V gradually increases, and ΔP increases accordingly until ΔP ≥ k*ΔP3.

[0104] At high speed, when ΔP < k*ΔP1, the fan speed has reached the set threshold. Therefore, it is necessary to reduce the flow area of ​​the upper air outlet to increase the resistance coefficient. First, adjust the air guide plate from Aa1 to Aa2. At this time, the air outlet area A decreases, and ΔP increases accordingly. If ΔP is still < k*ΔP3, continue to adjust the air guide plate to Aa3 until ΔP ≥ k*ΔP3.

[0105] Patent application CN114234364A proposes a method for determining air conditioner filter clogging. This patent determines whether the filter is clogged by monitoring the temperature difference within the inner pipe, the coil heating rate, and the compressor operating frequency. It comprehensively considers multiple operating indicators of the air conditioner to minimize misjudgments of filter clogging and improve the accuracy of filter clogging detection. Patent application CN117433107A provides a filter clogging alert method. This method uses two photosensitive sensors—one inside the air conditioner filter and one on the air conditioner panel—to detect light intensity. The difference is used to verify the correspondence, thereby detecting filter clogging. The method monitors filter clogging in real time during air conditioner operation and proactively reminds the user to clean the filter when it becomes clogged, ensuring air conditioner operating efficiency, minimizing odor generation, and protecting user health. Patent application CN207584923U discloses a fan coil unit filter clogging alarm device. The filter has differential pressure acquisition modules on both sides for collecting air pressure difference signals. When the air pressure difference signal from the differential pressure acquisition modules indicates that the pressure difference between the inside and outside of the filter exceeds a preset value, an alarm module issues an alarm signal, automatically reminding the user to clean the filter. While the above methods for monitoring and alerting users about filter clogging primarily consider whether the filter is clogged, they do not implement resistance adjustment or subsequent solutions based on the degree of clogging.

[0106] Patent CN207584923U determines whether the filter is clogged by measuring the pressure difference across the filter. This application also requires air pressure detection, but the main difference is that the device for collecting air pressure in this application is not installed on both sides of the filter. Instead of simply judging whether the filter is clogged by measuring the pressure difference across the filter, the monitoring device is installed at the top and bottom air inlets. The clog warning and subsequent adjustment of the air guide plate and fan speed are determined by the resistance changes at the top and bottom air inlets.

[0107] Based on this, this application proposes a control method for a wall-mounted air conditioner with reversible airflow. The air conditioner has two air supply modes: top inlet and bottom outlet, and bottom inlet and top outlet, maintaining the airflow based on the resistance coefficient relationship. Air inlet filters are installed at both the top and bottom air outlets. Since filter clogging affects resistance, the air pressure at the top and bottom air outlets is monitored to determine if the resistance is within a reasonable range. As the filters become increasingly clogged, their resistance increases, causing a change in the pressure difference between the top and bottom air outlets. When the resistance change reaches a certain critical range, a clog warning is sent to the user, and the fan speed and air guide vane are adjusted according to the pressure difference to regulate the air outlet resistance, thereby ensuring the normal operation of both air supply modes.

[0108] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0109] The air conditioner provided in this application includes a body 100, on which a first air vent 110 and a second air vent 120 are provided; an air guiding mechanism 200 is respectively provided at the first air vent 110 and / or the second air vent 120, at least a portion of the air guiding mechanism 200 is rotatably provided to block or avoid the airflow at the first air vent 110 and / or the second air vent 120; a pressure detection module is provided inside the body 100 and is signal-connected to the air guiding mechanism 200, the pressure detection module detects the pressure difference between the first air vent 110 and the second air vent 120, and controls the rotation stroke of the air guiding mechanism 200 according to the pressure difference. The pressure difference between the first air vent 110 and the second air vent 120 is detected by the pressure detection module to monitor the air pressure at the first air vent 110 and the second air vent 120 in real time. When the pressure difference between the first air vent 110 and the second air vent 120 changes significantly and affects the normal air output of the air conditioner, the rotation stroke of the air guide mechanism 200 is controlled according to the detected pressure difference to adjust the flow cross-sectional area of ​​the airflow at the first air vent 110 and / or the second air vent 120. This achieves the purpose of adjusting the pressure difference between the first air vent 110 and the second air vent 120, so as to ensure the stability of the airflow field and normal circulation, and avoid problems such as surge or significant reduction in air volume in the air conditioner.

[0110] The above description is merely a preferred 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 protection of the present invention.

Claims

1. An air conditioner, characterized in that, include: The body (100) is provided with a first air vent (110) and a second air vent (120); A guide mechanism (200) is provided at the first air vent (110) and / or the second air vent (120), and at least a portion of the guide mechanism (200) is rotatably provided to block or avoid the airflow at the first air vent (110) and / or the second air vent (120). A pressure detection module is installed inside the body (100) and connected to the air guide mechanism (200) via a signal. The pressure difference between the first air outlet (110) and the second air outlet (120) is obtained through the pressure detection module, and the rotation stroke of the air guide mechanism (200) is controlled according to the pressure difference.

2. The air conditioner according to claim 1, characterized in that, The pressure detection module includes: A first pressure detection component is installed at the first air outlet (110) to detect the first pressure value of the first air outlet (110); The second pressure detection component is installed at the second air outlet (120) to detect the second pressure value of the second air outlet (120); The data processing unit is connected to the first pressure detection component and the second pressure detection component respectively. The data processing unit calculates the pressure difference based on the first pressure value and the second pressure value.

3. The air conditioner according to claim 1, characterized in that, The air guiding mechanism (200) includes: The first air guide assembly (210) is disposed at the first air outlet (110). The first air guide assembly (210) includes a first air guide component (211) and a second air guide component (212). The first air guide component (211) and the second air guide component (212) are arranged sequentially along the width direction of the body (100). The first air guide component (211) and the second air guide component (212) are rotatably disposed.

4. The air conditioner according to claim 3, characterized in that, The body (100) includes a mounting surface (130) and an exterior surface (140) that are disposed opposite to each other; The first air guide component (211) is located on the side of the first air outlet (110) near the mounting surface (130), and the second air guide component (212) is located on the side of the first air guide component (211) near the outer surface (140); At least a portion of the second air guide component (212) extends along the first arcuate trajectory.

5. The air conditioner according to claim 1, characterized in that, The air guide mechanism (200) also includes: The second air guide assembly (220) is disposed at the second air outlet (120). The second air guide assembly (220) includes a third air guide component (221) and a fourth air guide component (222). The third air guide component (221) and the fourth air guide component (222) are arranged sequentially along the width direction of the body (100). The third air guide component (221) and the fourth air guide component (222) are respectively rotatably arranged.

6. The air conditioner according to claim 5, characterized in that, The body (100) includes a mounting surface (130) and an exterior surface (140) that are disposed opposite to each other; The third air guide component (221) is located on the side of the second air outlet (120) near the mounting surface (130), and the fourth air guide component (222) is located on the side of the third air guide component (221) near the outer surface (140); At least a portion of the fourth air guide component (222) extends along the first arcuate trajectory.

7. A control method for an air conditioner, applicable to the air conditioner according to any one of claims 1 to 6, characterized in that, Either the first air vent (110) or the second air vent (120) is an air outlet, the air guiding mechanism (200) is disposed at the air outlet, and the control method includes: Construct a pressure difference threshold between the first air outlet (110) and the second air outlet (120); The actual pressure difference ΔP between the first air outlet (110) and the second air outlet (120) is detected; Compare the actual pressure difference ΔP with the pressure difference threshold; Based on the comparison results, the air guide mechanism (200) is controlled to rotate within a predetermined angle range, or the fan speed of the air conditioner is adjusted, or a filter clogging warning is issued.

8. The control method for an air conditioner according to claim 7, characterized in that, The threshold for constructing the pressure difference between the first air outlet (110) and the second air outlet (120) includes: The fan operating speed threshold of the air conditioner is constructed, and the fan operating speed threshold includes a first speed threshold R1, a second speed threshold R2, and a third speed threshold R3 that gradually decrease. According to each of the aforementioned rotational speed thresholds, the differential pressure thresholds include a first differential pressure threshold △P1, a second differential pressure threshold △P2, and a third differential pressure threshold △P3.

9. The control method for an air conditioner according to claim 8, characterized in that, When the fan operating speed threshold is at the first speed threshold R1, and ΔP < k*ΔP1; the control method further includes: Control the air guide mechanism (200) to rotate at a first preset angle so that the air guide mechanism (200) blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner; Where k is a constant.

10. The control method for an air conditioner according to claim 9, characterized in that, The control method also includes After controlling the air guide mechanism (200) to rotate by a first preset angle; The actual pressure difference ΔP is compared with the first pressure difference threshold ΔP1; When △P < k*△P1, a filter clogging warning is issued.

11. The control method for an air conditioner according to claim 8, characterized in that, When the air conditioner's fan operates at the second speed threshold R2, and ΔP < k*ΔP2, the control method further includes: The fan speed of the air conditioner is increased from the second speed threshold R2 to the first speed threshold R1; Where k is a constant.

12. The control method for an air conditioner according to claim 11, characterized in that, When the operating speed of the air conditioner's fan is increased from the second speed threshold R2 to the first speed threshold R1, and ΔP < k*ΔP2, the control method further includes: The air guide mechanism (200) is controlled to rotate at a second preset angle so that the air guide mechanism (200) blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner.

13. The control method for an air conditioner according to claim 8, characterized in that, When the fan operating speed threshold is at the third speed threshold R3, and ΔP < k*ΔP3; the control method further includes: The operating speed of the air conditioner's fan is increased from the third speed threshold R3 to the second speed threshold R2; Where k is a constant.

14. The control method for an air conditioner according to claim 13, characterized in that, When the operating speed of the air conditioner's fan is increased from the third speed threshold R3 to the second speed threshold R2, and ΔP < k*ΔP3, the control method further includes: The fan speed of the air conditioner is controlled to be increased from the second speed threshold R2 to the first speed threshold R1.

15. The control method for an air conditioner according to claim 14, characterized in that, When the operating speed of the air conditioner's fan is increased from the second speed threshold R2 to the first speed threshold R1, and ΔP < k*ΔP3, the control method further includes: The air guide mechanism (200) is controlled to rotate at a third preset angle so that the air guide mechanism (200) blocks the air outlet, thereby reducing the cross-sectional area of ​​the airflow blown out by the air conditioner.

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