A wind direction adjusting device and a wind direction adjusting method based on ADPI

Abstract

The application discloses a wind direction adjusting device and a wind direction adjusting method based on ADPI, and aims at solving the technical problem of limited adjusting range of the top air supply angle of the existing adjustable angle. The adjusting device comprises a controller, a first wind blocking part, a second wind blocking part, a temperature sensor and a rotary driving mechanism. The first wind blocking part is arranged below the air supply opening of the air supply cavity in a rotatable manner to form a whole air channel with the air supply cavity. The first wind blocking part has a wind blocking surface. The second wind blocking part is arranged between the first wind blocking part and the air supply cavity. The second wind blocking part is used for isolating the whole air channel and the return air channel of the top air supply indoor unit. The rotary driving mechanism is connected with the first wind blocking part and controlled by the controller to drive the first wind blocking part to rotate. The temperature sensor is connected with the controller and arranged in the air supply cavity to detect the temperature of the air supply in the air supply cavity. The application has a large wind direction adjusting range and can ensure that the indoor air has a high air distribution characteristic index.

Description

Technical Field

[0001] This invention relates to the field of multi-split air supply technology, and more specifically, to an airflow direction adjustment device and an ADPI-based airflow direction adjustment method. Background Technology

[0002] The airflow pattern of multi-split indoor units cannot adapt to the different airflow distribution requirements of hot and cold air supply conditions. It cannot meet the timely operation requirements of different operating stages (initial startup, normal operation, and "maintenance" operation), nor the personalized needs of the seating distribution of people in the room and the relative position of the air supply terminals, resulting in a low ADPI (Air Distribution Index) value in the air-conditioned area. Taking a supply air temperature of 12-15℃ during cooling as an example, the cold air felt strong and uncomfortable within the height of the people's activity area, leading to awkward situations where users hang umbrellas or other obstructions below the air supply vents, seriously affecting the cleanliness and aesthetics of the room.

[0003] There are two possible solutions: increasing the supply air temperature and avoiding direct low-temperature supply air to areas where people are active. Under the premise of meeting indoor load requirements, solution 1 (increasing the supply air temperature) means increasing the supply air volume. Increasing the supply air volume can be achieved by increasing the fan volume or using induced draft ventilation. Increasing the fan volume is technically simple and theoretically feasible, but it increases the size of the indoor unit, operating noise, manufacturing costs, and energy consumption. These negative effects are very obvious and significant, greatly reducing the market competitiveness and user acceptance of the modified indoor unit, making widespread application difficult. Induced draft ventilation uses high-speed jets of air to induce the mixing of indoor air with the low-temperature supply air to increase the supply air temperature. This requires the addition of an induction device within the equipment and places higher demands on the fan head, similarly increasing the size of the indoor unit, operating noise, manufacturing costs, and energy consumption. According to the calculation formula of the Predicted Average Thermal Perceived Value (PMV), wind speed and temperature have a coupled effect on human thermal perception. That is, the higher the supply air speed, the higher the supply air temperature that meets comfort requirements. Increasing the supply air volume to raise the supply air temperature will increase the supply air speed in the activity area when the supply air is directly blowing on people, thus having limited improvement on comfort. Based on the above, this invention aims to solve the problem of poor indoor air distribution characteristics index (ADPI) in the use of multi-split air conditioners by means of approach 2 (avoiding low-temperature supply air directly reaching the activity area). Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems mentioned in the background art.

[0005] The technical problem to be solved by the present invention is how to obtain a reasonable air supply angle based on the optimization of indoor ADPI, and adjust the air supply angle of the ceiling-mounted indoor unit of a multi-split air conditioner through structural design, so as to provide a reasonable airflow distribution for both air conditioning cold and warm air. The purpose is to provide an air direction adjustment device and adjustment method for the ceiling-mounted indoor unit of a multi-split air conditioner.

[0006] This invention is achieved through the following technical solution:

[0007] On one hand, the present invention provides an airflow adjustment device for a multi-split air conditioner with overhead air supply, comprising:

[0008] Controller;

[0009] The first wind deflector is rotatably disposed at intervals below the air outlet of the air supply cavity to form an air-regulating channel with the air supply cavity. The first wind deflector has a wind deflector surface that can fully cover the air outlet in the vertical direction.

[0010] The second wind deflector is disposed between the first wind deflector and the air supply cavity, and the second wind deflector is used to isolate the air rectification channel and the return air channel of the indoor unit;

[0011] A rotary drive mechanism is connected to the first windshield and controlled by the controller to drive the first windshield to rotate.

[0012] A temperature sensor connected to the controller is used to be installed in the air supply cavity.

[0013] In one possible design, the first windshield and the second windshield are rotatably connected.

[0014] In one possible design, the rotary drive mechanism has a lifting end connected to the first windshield member, the lifting end being positioned opposite the second windshield member, and the first windshield member rotating relative to the second windshield member under the drive of the lifting end.

[0015] In one possible design, the rotary drive mechanism includes:

[0016] Power source;

[0017] A transmission device that cooperates with the power source to transmit driving torque;

[0018] A connector that cooperates with the transmission and is connected to the lifting end to drive the lifting end to move up and down.

[0019] In one possible design, the connector is a flexible steel wire rope and the transmission device is a guide wheel;

[0020] One end of the connector is connected to the lifting end, and the other end bypasses the transmission and is connected to the power source.

[0021] In one possible design, the power source is configured as an electric motor.

[0022] In one possible design, the second wind deflector is equipped with a lifting mechanism for connecting to the air supply cavity; the second wind deflector is raised and lowered under the action of the lifting mechanism.

[0023] In one possible design, the second windbreak is a windbreak curtain made of micro-permeable fiber fabric with an air permeability velocity of less than 2.5 mm / s.

[0024] In one possible design, the first windshield is constructed as a double-layered hollow structure.

[0025] On the other hand, the present invention provides a wind direction adjustment method based on ADPI, implemented using any of the above-mentioned wind direction adjustment devices, comprising the following steps:

[0026] An air supply angle database is pre-built in the controller. The database includes: installation status parameters, air supply temperature, air supply speed, indoor air conditioning set temperature, and cooling / heating modes. The target set of air supply angle values ​​corresponding to different combinations of the above parameters is optimized with ADPI as the goal.

[0027] Obtain the installation status parameters of this indoor unit, and obtain the supply air temperature, supply air speed, indoor air conditioning set temperature and cooling / heating mode in real time;

[0028] The combination of indoor unit installation status parameters, supply air temperature, supply air speed, indoor air conditioning set temperature and cooling / heating / mode is used as input and compared with the combination in the database to obtain the real-time target value of the supply air angle.

[0029] The controller controls the rotary drive mechanism to rotate the first baffle based on the obtained target value of the air delivery angle.

[0030] When the indoor unit is turned off or there is an unexpected power outage, the airflow adjustment device will reset to the off state.

[0031] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0032] 1. The wind direction adjustment device and ADPI-based wind direction adjustment method provided in this embodiment of the invention can automatically adjust the air supply direction at different air supply temperatures by setting a controller, a rotary drive mechanism, and a first wind deflector. During cooling, it can extend the travel distance of the cold airflow from the air supply cavity to the human activity area, allowing for more thorough mixing of the airflow with the indoor air and avoiding the discomfort of direct cold air blowing into the activity area. During heating, it can deliver hot air to the activity area at a vertical air supply angle, preventing the warm airflow from merely suspending in the upper space due to density differences; ensuring good air distribution characteristics in the room during both cooling and heating conditions.

[0033] 2. The wind direction adjustment device and the wind direction adjustment method based on ADPI provided in the embodiments of the present invention can prevent airflow circulation between the air supply port of the air supply cavity and the return air channel by setting the second wind baffle, thereby preventing the air supply "short circuit".

[0034] 3. The wind direction adjustment device and ADPI-based wind direction adjustment method provided in this embodiment of the invention do not require increasing the fan capacity of the indoor unit or adding an induction device, and therefore have no negative effects such as increased operating noise and energy consumption. Implementation costs are low and convenient. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the wind direction adjustment device provided in an embodiment of the present invention;

[0037] Figure 2 This is a top view of the wind direction adjustment device provided in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the first side cross-sectional structure of the wind direction adjustment device provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the second side cross-sectional structure of the wind direction adjustment device provided in an embodiment of the present invention;

[0040] Figure 5 A schematic diagram illustrating the database establishment process in the ADPI-based wind direction adjustment method provided in this embodiment of the invention;

[0041] Figure 6 This is a schematic diagram of the logic control of the wind direction adjustment method based on ADPI provided in an embodiment of the present invention.

[0042] The attached diagram shows the markings and corresponding component names:

[0043] 1-Air supply cavity, 2-First wind deflector, 3-Lifting mechanism, 31-Second wind deflector, 32-Lifting rod, 33-Inner pull rope, 34-Inner transmission device, 35-Inner driver, 4-Rotary drive mechanism, 41-Pull rope, 42-Transmission device, 43-Power source, 5-Temperature sensor. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0045] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0046] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] In the description of this invention, the terms "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "high," "low," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0048] Multi-split air conditioning systems have become increasingly popular in various buildings in recent years due to their high efficiency under partial load and flexibility of use, especially in low-ceilinged office, conference, and residential spaces. Based on the requirements for dehumidification and cooling in summer, the evaporation temperature of the indoor unit of a multi-split system is typically 7℃, the outlet air temperature is 12℃, and the relative humidity is 90%. When cooling, the discomfort caused by cold air in the activity areas leads to numerous user complaints. Furthermore, during heating, the low density of the hot air often results in it remaining suspended in the upper part of the room, failing to heat the activity areas.

[0049] There are two possible solutions: increasing the supply air temperature and avoiding direct low-temperature supply air to areas where people are active. Under the premise of meeting indoor load requirements, solution 1 (increasing the supply air temperature) means increasing the supply air volume. Increasing the supply air volume can be achieved by increasing the fan airflow and using induced draft ventilation. Increasing the fan airflow is technically simple and theoretically feasible, but it will increase the size of the indoor unit, operating noise, manufacturing costs, and energy consumption. These negative effects are very obvious and significant, greatly reducing the market competitiveness and user acceptance of the modified indoor unit, making widespread application difficult. Induced draft ventilation uses high-speed jets of air to induce the mixing of indoor air with the low-temperature supply air to increase the supply air temperature. This requires the addition of an induction device within the equipment and places higher demands on the fan head, similarly increasing the size of the indoor unit, operating noise, manufacturing costs, and energy consumption. According to the calculation formula of the Predicted Average Thermal Perceived Value (PMV), wind speed and temperature have a coupled effect on human thermal perception. That is, the higher the supply air speed, the higher the supply air temperature that meets comfort requirements. Increasing the supply air volume to raise the supply air temperature will increase the supply air speed in the activity area when the supply air is directly blowing on people, thus having limited improvement on comfort. Based on the above, this invention aims to solve the problem of poor indoor air distribution characteristics index (ADPI) in the use of multi-split air conditioners by means of approach 2 (avoiding low-temperature supply air directly reaching the activity area).

[0050] On the one hand, such as Figures 1-4 As shown, in one embodiment of the wind direction adjustment device provided by the present invention, the wind direction adjustment device includes a controller, a first wind deflector 2, a second wind deflector 31, a temperature sensor 5, and a rotary drive mechanism 4; the first wind deflector 2 is rotatably disposed at intervals below the air outlet of the air supply cavity 1 to form an air-regulating channel with the air supply cavity 1, and the first wind deflector 2 has a wind-blocking surface that can form a full coverage of the air outlet in the vertical direction; the second wind deflector 31 is disposed between the first wind deflector 2 and the air supply cavity 1, and the second wind deflector 31 is used to isolate the air-regulating channel and the return air channel of the top-supply indoor unit; the rotary drive mechanism 4 is connected to the first wind deflector 2 and controlled by the controller to drive the first wind deflector 2 to rotate; the temperature sensor 5 is connected to the controller and is disposed in the air supply cavity 1 to detect the temperature of the air supplied in the air supply cavity 1.

[0051] In this embodiment, the control of the airflow adjustment device can be incorporated into the existing control system of the multi-split air conditioner indoor unit. The first wind deflector 2 can be square plate-shaped to adapt to the shape of the air outlet, but it is not limited to this. In other embodiments, it can be constructed in any shape, as long as it has a wind deflector surface that can completely cover the air outlet. In the initial installation state, the wind deflector surface of the first wind deflector 2 is horizontal, with one side of the wind deflector surface close to the return air duct. The rotation axis of the first wind deflector 2 can be located at any position on the first wind deflector 2 according to the air supply direction requirements. In this embodiment, in order to send the airflow in the air supply cavity 1 out from the side of the first wind deflector 2 away from the return air duct and to make that side have a large angle adjustment range, the rotation axis is located on the side of the wind deflector surface close to the return air duct and the axis of the rotation axis is parallel to that side. The rotation axis can be connected to the air supply cavity 1 through a connector, for example, the second wind deflector 31 can be used as the connector, and the first wind deflector... The side structure of the first baffle 2 near the return air duct is rotatably connected to the second baffle 31, wherein the rotation axis of the first baffle 2 is parallel to this side. The shape of the second baffle 31 can be constructed as a rectangle, with one side of the second baffle 31 rotatably connected to the first baffle 2 and the opposite side connected to the air supply cavity 1. The rotary drive mechanism 4 can be installed in the air supply cavity 1. The rotary drive mechanism 4 can have a lifting end, which is located on the side structure of the first baffle 2 away from the return air duct. When the rotary drive mechanism 4 is activated, the lifting end lifts and lowers so that the first baffle 2 rotates around the rotation axis. The temperature sensor 5 can be installed inside the air supply cavity 1. Depending on the size of the indoor unit's air supply cavity, the number of temperature sensors 5 can be one or more, taking into account both the accuracy of the temperature detection results and manufacturing cost factors.

[0052] In the application of the airflow adjustment device provided in this embodiment, the controller acquires the temperature parameters fed back by the temperature sensor 5 in real time. When the number of temperature sensors 5 is configured to be multiple, the controller acquires multiple temperature parameters and calculates the average value of the multiple temperature parameters as the airflow temperature in the air supply cavity 1. When the controller receives a manual adjustment command, the controller responds to the manual adjustment command by controlling the rotary drive mechanism 4 to rotate the first wind deflector 2. During the rotation, the wind deflector surface on the first wind deflector 2 forms different angles with the horizontal plane, and the airflow in the air supply cavity 1 flows out of the air rectifier channel through the guide of the wind deflector surface. When the controller receives an automatic adjustment command, it controls the rotary drive mechanism 4 to rotate the first baffle 2 based on the airflow temperature. Specifically, taking the cooling mode as an example, when the temperature sensor 5 detects that the temperature inside the air supply cavity 1 is too low, the controller controls the rotary drive mechanism 4 to rotate the first baffle 2 clockwise. At this time, the side of the first baffle 2 furthest from the return air channel moves closer to the air supply cavity 1. The airflow inside the air supply cavity 1, guided by the upper baffle surface of the first baffle 2, increases the angle of upward airflow, extending the travel distance of the airflow to the human activity area, thus improving the mixing of the supplied air with the indoor air. Sufficient airflow is provided to ensure that the temperature rises when the air reaches the activity area, preventing the discomfort of cold air blowing directly into the area. When the temperature sensor 5 detects a high temperature inside the air supply cavity, the controller activates the rotary drive mechanism 4 to rotate the first baffle 2 counterclockwise. At this time, the side of the first baffle 2 furthest from the return air channel is further away from the air supply cavity 1. The airflow inside the air supply cavity 1, guided by the baffle surface of the first baffle 2, reduces the angle of upward airflow, shortening the journey of the airflow to the activity area. This means the contact time between the supplied air and the indoor air is shorter, resulting in a more comfortable temperature when the air reaches the activity area. In heating mode, the rotation direction of the first baffle 2 is opposite to that in cooling mode.

[0053] It should be noted that the above-mentioned low and high temperatures refer to relative temperatures in cooling mode. That is, in cooling mode, the airflow temperature in the air supply cavity 1 is always lower than the indoor temperature, while in heating mode, the airflow temperature in the air supply cavity 1 is always higher than the indoor temperature.

[0054] It should be noted that the manual adjustment command and the automatic adjustment command in the embodiments of this application can be selected by the user using a remote control, as long as the communication module is configured in the controller.

[0055] In this embodiment, the rotating shaft can also be connected to the air supply cavity 1 via connecting rods. Specifically, one end of each connecting rod is rotatably connected to both ends of the rotating shaft, and the other end is connected to the air supply cavity 1. When the rotating shaft is in other positions on the first baffle 2, a movable seal can be formed between the first baffle 2 and the second baffle 31 to prevent the airflow from the air supply cavity 1 from directly entering the return air channel, while allowing relative movement between the first baffle 2 and the second baffle 31.

[0056] In this embodiment, when the rotary drive mechanism 4 is installed in the air supply cavity 1, the space below the air outlet can be avoided from being occupied, thereby preventing the airflow from being blocked when it flows out of the air supply cavity 1. Of course, in other embodiments, if the problem of obstruction is not considered, the rotary drive mechanism 4 can be placed outside the air supply cavity 1.

[0057] In this embodiment, the rotary drive mechanism 4 can be directly connected to the rotating shaft. The rotary drive mechanism 4 drives the rotating shaft to rotate, thereby driving the first windshield 2 to rotate. At this time, the rotary drive mechanism 4 can serve as a connector between the first windshield 2 and the air supply cavity 1.

[0058] In one possible embodiment, the rotary drive mechanism 4 may specifically include a power source 43, a transmission device 42, and a connector; the transmission device 42 cooperates with the power source 43 to transmit driving torque; the connector cooperates with the transmission device 42 and is connected to the lifting end to drive the lifting end to move up and down.

[0059] In this embodiment, the power source 43 can be configured as a rotary power source, such as an electric motor, or as a telescopic power source, such as a cylinder or hydraulic cylinder. When the power source 43 is configured as an electric motor, the transmission device 42 is configured as a steering mechanism, such as a gear rack, worm gear, or lead screw slide. When the power source 43 is configured as a cylinder or hydraulic cylinder, the transmission device 42 can simply be an intermediate transmission device between the moving end of the power source 43 and the connecting member.

[0060] In one possible embodiment, taking a motor as an example of a power source 43, the connector is a flexible steel wire rope and the transmission device 42 is a guide wheel; one end of the connector is connected to the lifting end, and the other end passes around the transmission device 42 and is connected to the power source 43.

[0061] In this embodiment, the guide wheel can be installed inside the air supply cavity 1 at a position corresponding to the center of the air supply port. This allows the connector, after engaging with the guide wheel, to connect via the lifting end to the center of the side of the first windshield 2 away from the return air channel. Consequently, the first windshield 2 can maintain a relatively stable posture during the pulling process of the connector. A spool can be mounted on the output shaft of the power source 43 to wind up the connector, reducing its space occupation. By setting the connector as a flexible steel wire rope, in conjunction with the guide wheel and motor, the rotary drive mechanism 4 can provide a large lifting range for the lifting end with a small space occupation, thereby allowing the first windshield 2 to have a large rotation range.

[0062] In one possible embodiment, the second wind deflector 31 is equipped with a lifting mechanism 3, which is used to connect with the air supply cavity 1; the second wind deflector 31 is raised and lowered under the drive of the lifting mechanism 3.

[0063] In this embodiment, the height of the second baffle 31 is variable, driven by the lifting mechanism 3. The lifting mechanism 3 is installed inside the air supply cavity 1 to reduce the space occupied below the air outlet and avoid obstructing the air duct or return air duct. A clearance hole can be provided on the air supply cavity 1 for the second baffle 31 to pass through. When the first baffle 2 and the second baffle 31 are connected by a rotating shaft, the height of the first baffle 2 can be adjusted by adjusting the height of the second baffle 31. Thus, when the multi-split air conditioner is stopped, the first baffle 2 can block the air outlet under the action of the rotary drive mechanism 4 and the lifting mechanism 3, thereby preventing dust from entering the air supply cavity 1.

[0064] The lifting mechanism 3 may specifically include inner pull ropes 33, a lifting rod 32, an inner transmission device 34, and an inner driver 35. Two inner pull ropes 33 are respectively connected to opposite ends of the lifting rod 32, which is connected to the windbreak curtain. The inner transmission device 34 is configured as a guide wheel, and two inner transmission devices 34 are respectively connected to the air supply cavity 1, their positions corresponding to the two inner pull ropes 33. The inner driver 35 may be configured as a motor and installed in the air supply cavity 1. The two inner pull ropes 33 pass around two corresponding inner transmission devices 34 and are connected to the inner driver 35. Two reels may be mounted on the inner driver 35 to wind up the two inner pull ropes 33 respectively, thereby ensuring that the opposite ends of the lifting rod 32 have the same rising or falling speed.

[0065] In one possible embodiment, the second windbreak 31 may be configured as a windbreak curtain made of a micro-permeable fiber fabric with an air permeability of less than 2.5 mm / s.

[0066] In this embodiment, the windbreak curtain made of fabric fibers allows airflow to permeate to a certain extent, thereby creating a slight positive pressure on the side of the windbreak curtain near the return air channel, preventing indoor return air from contacting the second windbreak 31 and preventing condensation.

[0067] The structure on the side opposite to the windproof surface of the first windproof component 2 always needs to be in contact with the indoor air. If the temperature difference between the first windproof component 2 and the indoor air is large, condensation is likely to form on the first windproof component 2. Therefore, in one possible embodiment, the first windproof component 2 is constructed as a double-layer hollow structure.

[0068] In this embodiment, the material of the first windbreak 2 can be configured as PVC material to ensure good heat insulation.

[0069] On the other hand, such as Figures 5-6 As shown, in one embodiment of the ADPI-based wind direction adjustment method provided by the present invention, the wind direction adjustment is implemented based on any of the wind direction adjustment devices provided in the above embodiments. The air supply angle adjustment based on user manual selection can be divided into two types: calculation recommendation mode and user autonomous mode. The adjustment method of calculation recommendation mode includes the following steps:

[0070] S1. A supply air angle database is pre-built in the controller. The database includes: a set of installation status parameters, cooling / heating modes, indoor air conditioning set temperature, supply air temperature and supply air speed, with the goal of optimizing ADPI and the solution set of supply air angle target values ​​corresponding to different combinations of the above parameters.

[0071] The installation status parameters include installation height and installation form, which can be further divided into two types: with ceiling and without ceiling.

[0072] The cooling / heating mode can be a specific code with a check bit.

[0073] In this embodiment, the optimal ADPI and air supply angle solution sets are obtained based on experimental tests and CFD (Computational Fluid Dynamics) simulations under typical operating conditions. The specific steps are as follows:

[0074] Under typical operating conditions in the experimental test, the installation parameters and cooling / heating mode of the airflow adjustment device are first determined. In this installation state and cooling / heating mode, the indoor unit is adjusted to the set air supply temperature and speed, and the first deflector 2 is controlled to rotate to the first angle. Multiple measuring points are determined in the active area, and the air temperature and air speed at each point are measured. Combined with the indoor air conditioning set temperature, the ADPI value at the first angle is calculated according to the following formula:

[0075] ΔET=(t i -t n )-7.66(u i -0.15)

[0076]

[0077] Where ΔET is the effective temperature difference, in °C; t i t n These are the air temperature at a certain point in the activity area and the given indoor air conditioning set temperature, respectively, in °C; u i Let be the air velocity at a point in the activity area, in m / s.

[0078] Control the first air deflector 2 to rotate to the second angle, and test the air temperature and velocity at each measuring point again. Calculate the ADPI value at the second angle according to the formula mentioned above. Repeat the above steps until multiple ADPI values ​​that meet the required number are obtained. Compare the obtained ADPI values ​​and take the largest ADPI value as the optimal ADPI. The air supply angle corresponding to this optimal ADPI is the optimal air supply angle under the aforementioned installation parameters, cooling / heating mode, indoor air conditioning set temperature, set air supply temperature, and air supply velocity conditions.

[0079] Change the experimental conditions and repeat the above test process to complete all the preset typical operating condition tests.

[0080] Using typical experimental test conditions as input, an indoor airflow organization calculation model was established using CFD. The optimal ADPI and corresponding air supply angle for each typical test condition were simulated and calculated, and the results were verified with the experimental test results. The calculation model was then debugged.

[0081] Using a calculation model validated by measured data, we simulate and analyze the optimal ADPI corresponding to any combination of parameters within the set of installation status parameters, cooling / heating mode, indoor air conditioning set temperature, supply air temperature, and supply air velocity, as well as the corresponding supply air angle solution set.

[0082] The aforementioned optimal ADPI and air supply angle, along with the corresponding installation status parameters, cooling / heating mode, indoor air conditioning set temperature, air supply temperature, and air supply speed, are entered into the air supply angle database.

[0083] S2. Obtain the installation status parameters and cooling / heating / mode of the indoor unit, and obtain in real time the supply air temperature detected by the temperature sensor, the supply air speed determined by the indoor unit's air volume setting, the indoor air conditioning set temperature, and the cooling / heating / mode.

[0084] S3. Based on the parameters obtained from S2, match the installation status parameters, cooling / heating mode, indoor air conditioning set temperature, indoor unit air supply temperature and air supply speed in the database to obtain the optimal air supply angle.

[0085] S4. The controller controls the rotary drive mechanism to work according to the obtained standard air supply angle so as to drive the first wind deflector 2 to rotate.

[0086] User-defined mode allows users to manually set the air delivery angle based on their preferences for wind speed and airflow distribution in the activity area, or based on different scenarios.

[0087] In this embodiment, the cooling / heating mode of the indoor unit is usually determined based on the indoor unit's set value. Alternatively, it can be determined by the supply air temperature. When the supply air temperature is less than 25°C, the default is cooling mode, and the controller controls the rotary drive mechanism 4 to rotate the first baffle 2 clockwise so that the first baffle 2 is closer to the air supply cavity 1. When the supply air temperature of the multi-split unit is greater than 25°C, the default is heating mode, and the controller controls the rotary drive mechanism 4 to rotate the first baffle 2 counterclockwise so that the first baffle 2 is further away from the air supply cavity 1.

[0088] In this embodiment, the air supply temperature can be detected by the temperature sensor 5 in the air supply cavity 1 to ensure the accuracy of the air supply temperature. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. 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 airflow direction adjustment device for a multi-split air conditioning unit with overhead air supply, characterized in that, include: Controller; The first wind deflector (2) is rotatably disposed at intervals below the air outlet of the air supply cavity (1) to form an air-regulating channel with the air supply cavity (1). The first wind deflector (2) has a wind deflector surface that can form a full coverage of the air outlet in the vertical direction. The second wind deflector (31) is disposed between the first wind deflector (2) and the air supply cavity (1). The first wind deflector (2) and the second wind deflector (31) are rotatably connected. The second wind deflector (31) is used to isolate the air rectifier channel and the return air channel of the indoor unit. A rotary drive mechanism (4) is connected to the first windshield (2) and controlled by the controller to drive the first windshield (2) to rotate. The rotary drive mechanism (4) has a lifting end connected to the first windshield (2). The lifting end is positioned opposite to the second windshield (31). The first windshield (2) rotates relative to the second windshield (31) under the drive of the lifting end. A temperature sensor (5) connected to the controller is used to be installed in the air supply cavity (1); The second wind deflector (31) is equipped with a lifting mechanism (3), which is used to connect with the air supply cavity (1); the second wind deflector (31) is lifted and lowered under the drive of the lifting mechanism (3).

2. The wind direction adjustment device according to claim 1, characterized in that, The rotary drive mechanism (4) includes: Power source (43); Transmission device (42), which cooperates with the power source (43) to transmit driving torque; A connector that cooperates with the transmission (42) and is connected to the lifting end to drive the lifting end to move up and down.

3. The wind direction adjustment device according to claim 2, characterized in that, The connector is a flexible steel wire rope and the transmission device (42) is a guide wheel; One end of the connector is connected to the lifting end, and the other end is connected to the power source (43) by bypassing the transmission device (42).

4. The wind direction adjustment device according to claim 2, characterized in that, The power source (43) is configured as an electric motor.

5. The wind direction adjustment device according to claim 1, characterized in that, The second windbreak (31) is a windbreak curtain made of micro-permeable fiber fabric with a wind velocity of less than 2.5 mm / s.

6. The wind direction adjustment device according to claim 1, characterized in that, The first windshield (2) is constructed as a double-layer hollow structure.

7. An ADPI-based airflow direction adjustment method, implemented using the airflow direction adjustment device for an indoor unit as described in any one of claims 1 to 6, characterized in that, Includes the following steps: An air supply angle database is pre-built in the controller. The database includes: installation status parameters, air supply temperature, air supply speed, indoor air conditioning set temperature, and cooling / heating modes. The target set of air supply angle values ​​corresponding to different combinations of the aforementioned parameters is optimized with ADPI as the objective. Obtain the installation status parameters of the indoor unit, and obtain the supply air temperature, supply air speed, indoor air conditioning set temperature and cooling / heating mode in real time; The combination of indoor unit installation status parameters, supply air temperature, supply air speed, indoor air conditioning set temperature and cooling / heating / mode is used as input and compared with the combination in the database to obtain the real-time target value of the supply air angle. The controller controls the rotary drive mechanism (4) to work to drive the first wind deflector (2) to rotate based on the obtained target value of the air delivery angle. When the indoor unit is turned off or there is an unexpected power outage, the airflow adjustment device will reset to the off state.

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