Heat exchange device, air conditioning unit and air guide angle setting method

Abstract

The invention relates to a heat exchange device, an air conditioning unit and an air guide angle setting method.The heat exchange device comprises a shell, a draught fan, a filter screen and a heat exchanger, the shell is provided with an air inlet side and an air outlet side, and the draught fan, the filter screen and the heat exchanger are sequentially arranged in the shell in the flowing direction of air from the air inlet side to the air outlet side; and a static pressure cavity is formed in an area between the air outlet of the fan and the filter screen. The static pressure cavity is arranged between the air outlet of the fan and the filter screen, so that airflow blown out by the fan is uniformly distributed at the filter screen, and the problems of local blockage of the filter screen, efficiency reduction and insufficient heat exchange caused by airflow concentration or disorder in the traditional design are solved. Meanwhile, the uniform air flow reduces the resistance and the operation noise of the system, reduces the energy consumption of a fan, maintains the efficient and stable heat exchange performance under various working conditions, and prolongs the service life of the heat exchange device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a heat exchange device, an air conditioning unit and a method for setting a wind guide angle. BACKGROUND

[0002] A fresh air dehumidification unit is a special air treatment equipment for indoor air quality control, which functions to filter, dehumidify and temperature regulate the air while introducing outdoor fresh air to meet the comprehensive requirements of indoor humidity, cleanliness and thermal comfort.

[0003] In the existing fresh air dehumidification unit, a fan, a filter screen and an evaporator are arranged in sequence along the air flow direction. In actual operation, the high-speed airflow generated by the fan directly impacts the central area of the filter screen, resulting in a significantly higher airflow speed in this area than in the surrounding area, forming a local high wind speed zone. This non-uniform airflow distribution makes it difficult for the air after passing through the filter screen to make uniform contact with the heat exchange surface when entering the evaporator. Some areas have a shortened heat exchange time between the air and the heat exchange fins due to excessively high wind speed, while other areas have low heat exchange efficiency due to slow airflow, which overall weakens the heat load carrying capacity and condensation dehumidification performance of the evaporator. At the same time, due to the non-uniformity of the airflow at the inlet of the filter screen, particulate matter in the air is more likely to accumulate and deposit in the high wind speed area, causing rapid clogging of the local pores of the filter screen and forming a "preferential channel" effect, further exacerbating the uneven distribution of airflow, causing the airflow to bypass the clogged area, and thus continuously deteriorating the inlet air conditions of the evaporator during system operation, ultimately leading to a decrease in the energy efficiency and operating stability of the unit.

[0004] Invention content The present application provides a heat exchange device, an air conditioning unit and a method for setting a wind guide angle to solve the problem of uneven distribution of air blown by the fan after passing through the filter screen in the prior art.

[0005] In a first aspect, the present application provides a heat exchange device, comprising a shell, a fan, a filter screen and a heat exchanger, wherein: the shell is provided with an air inlet side and an air outlet side, and the fan, the filter screen and the heat exchanger are arranged in sequence along the flow direction of the air from the air inlet side to the air outlet side inside the shell; a static pressure cavity is formed between the air outlet of the fan and the filter screen, allowing the airflow to flow uniformly through the filter screen.

[0006] Further, the air outlet of the fan is provided with a wind guide assembly, which adjusts the wind direction of the fan by changing the wind guide angle.

[0007] In specific embodiments, the wind guide assembly comprises: a plurality of wind guide grilles, and a drive motor connected to each wind guide grille and capable of driving the wind guide grilles to adjust the grille angle. The plurality of air guiding grilles are combined to form an air guiding grille group, and each air guiding grille is independently adjustable in grille angle to adjust the air outlet direction.

[0008] In specific embodiments, the air guiding assembly further comprises a controller. The controller controls the fan to operate at a preset rated speed, monitors the duty cycle data of the fan motor, controls the air guiding grille group to switch from the minimum grille angle to the maximum grille angle or from the maximum grille angle to the minimum grille angle within a first preset time length, captures the duty cycle data set within the first preset time length, and associates each duty cycle data with the grille angle of each air guiding grille group according to the time parameter; and sets the grille angle associated with the lowest duty cycle data in the duty cycle data set as the grille angle of the air guiding grille group.

[0009] In specific embodiments, the air guiding assembly further comprises a controller. The controller obtains a corresponding relationship between a preset grille angle and a historical operation time interval of the fan, different historical operation time intervals of the fan correspond to different grille angles of the plurality of air guiding grilles, determines the different grille angles of the plurality of air guiding grilles according to a historical operation time interval in which the cumulative operation time of the fan is located, and adjusts the plurality of air guiding grilles by using the grille angles.

[0010] Further, a partition plate with a ventilation opening is arranged in the shell to divide the shell into an air inlet area and an air outlet area; the fan is installed in the air inlet area, and the air outlet end faces the ventilation opening and is attached to one side of the partition plate in the air inlet area; and the other side of the partition plate in the air outlet area is provided with the filter screen and the heat exchanger.

[0011] Further, the other side of the partition plate is provided with a mounting groove for mounting the filter screen at a position corresponding to the ventilation opening, and the ventilation cross section of the mounting groove is larger than the area of the ventilation opening, so that a static pressure cavity is formed in the mounting groove.

[0012] Further, the filter screen and the heat exchanger are arranged in parallel and at intervals, and the filtering surface of the filter screen faces the heat exchange surface of the heat exchanger.

[0013] Preferably, the fan is a volute fan, and the filter screen is a high-efficiency filter screen.

[0014] Preferably, the air guiding assembly is an air guiding grille.

[0015] In a second aspect, the application provides a method for setting an air guiding angle, using the heat exchange device described above, comprising the following steps: The fan is controlled to operate at a preset rated speed, and the duty cycle data of the fan motor is monitored. control the air guide assembly to switch from the minimum air guide angle to the maximum air guide angle or from the maximum air guide angle to the minimum air guide angle within a first preset time length; capture the duty cycle data set within the first preset time length, and associate each duty cycle data with the air guide angle of the air guide assembly according to the time parameter; set the air guide angle associated with the lowest duty cycle data in the duty cycle data set as the air guide angle of the air guide assembly.

[0016] Further, after the air guide angle of the air guide assembly is set, the running time length of the unit is re-accumulated, and when the accumulated running time length of the unit reaches a second preset time length, the step of controlling the fan to run at the preset rated speed is re-executed.

[0017] In a third aspect, the present application provides an air conditioning unit, which comprises the heat exchange device described above.

[0018] Preferably, the air conditioning unit is a fresh air dehumidification unit.

[0019] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art: The method provided by the embodiments of the present application designs the area between the air outlet of the fan and the filter screen as a static pressure cavity. The cavity expands the cross-sectional area, so that the high-speed airflow at the air outlet of the fan is diffused and decelerated here, and the pressure distribution tends to be uniform, thereby ensuring that the airflow flows smoothly and without turbulence over the surface of the filter screen, avoiding local blockage of the filter screen. At the same time, the uniform airflow reduces the system resistance and operating noise, reduces the energy consumption of the fan, and the airflow that has passed through the filter screen uniformly can also uniformly exchange heat with the heat exchange fins of the heat exchanger, further ensuring the heat exchange efficiency of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings from these drawings without any creative effort.

[0022] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings do not constitute a proportional limitation.

[0023] Figure 1 Figure 1 is a structural schematic diagram of the device in the embodiment of the present application; Figure 2 Figure 2 is a structural schematic diagram of the air guide assembly in the first embodiment of the present application at a regular air guide angle; Figure 3 Figure 3 is a structural schematic diagram of the air guide assembly in the first embodiment of the present application at a minimum air guide angle; Figure 4 Figure 4 is a structural schematic diagram of the air guide assembly in the first embodiment of the present application at a maximum air guide angle; Figure 5 Figure 5 is a top view of the device in the embodiment of the present application; Figure 6 Figure 6 is a side view of the device in the embodiment of the present application; Figure 7 Figure 7 is a front view of the device in the embodiment of the present application; Figure 8 Figure 8 is a flow chart of the embodiment of the present application; Figure 9 Figure 9 is a schematic diagram of the transmission structure of the air guide assembly in the second embodiment of the present application; Figure 10 Figure 10 is a structural schematic diagram of the air guide assembly in the second embodiment of the present application at a regular air guide angle; Figure 11 Figure 11 is a structural schematic diagram of the air guide assembly in the second embodiment of the present application at a minimum air guide angle; Figure 12 Figure 12 is a structural schematic diagram of the air guide assembly in the second embodiment of the present application at a maximum air guide angle; Explanation of reference signs: 1, housing; 11, air inlet flange; 12, air outlet flange; 13, partition plate; 2, fan; 3, filter screen; 4, heat exchanger; 5, air guide assembly; 51, electric drive unit; 52, air guide grid; 53, main shaft; 54, drive gear; 55, rack. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0025] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For purposes of explanation and ease of understanding, specific examples of components and arrangements are described herein. Of course, they are merely examples and are not intended to limit the present application. Also, the present application can be repeated with variations and / or modifications in different examples. Such repetition is for the purpose of simplification and clarity and does not indicate a relationship between the various embodiments and / or arrangements discussed.

[0026] For ease of description, spatial relative terms can be used herein to describe the relative position relationship or movement of one element or feature with respect to another element or feature as shown in the drawings, such as "internal", "external", "inner", "outer", "under", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the up and down positions. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0027] In order to solve the technical problem that the fan directly blows the filter screen in the prior art, causing uneven distribution of air after passing through the filter screen, affecting the heat exchange efficiency of the heat exchanger, the present application provides a heat exchange device, which can realize that the air can uniformly pass through the filter screen to reach the heat exchanger after being introduced by the fan, avoiding local blockage of the filter screen.

[0028] Figure 1A heat exchange device provided in this application embodiment includes: a housing 1, a fan 2, a filter 3, and a heat exchanger 4. Air vents are opened on the same or different sides of the housing 1, forming an air inlet side and an air outlet side, providing inlet and outlet paths for external air. The fan 2, filter 3, and heat exchanger 4 are sequentially arranged inside the housing 1 along the air flow direction from the air inlet side to the air outlet side. The fan 2 is installed inside the housing 1 near the air inlet side (or it can be installed outside the housing, with the air outlet facing the filter inside the housing), used to draw in external air and accelerate the airflow, with its air outlet facing the filter 3. The filter 3 is located downstream of the fan 2, used to intercept dust, particulate matter, and other impurities in the air, ensuring the cleanliness of the air entering the heat exchanger 4 and flowing out of the housing 1 from the air outlet side. The heat exchanger 4 is positioned after the filter 3 to exchange heat with the air, regulating the air temperature through internal fluid circulation. The area between the air outlet of fan 2 and filter 3 is designed as a static pressure chamber. This chamber has a larger cross-sectional area than the air outlet of fan 2, allowing the high-speed airflow from the fan 2 outlet to diffuse and slow down, resulting in a more uniform pressure distribution. This ensures that the airflow passes smoothly and without turbulence over the surface of filter 3. Furthermore, the size of this static pressure chamber can be flexibly adjusted according to the actual installation space to accommodate different airflow and pressure requirements.

[0029] By setting a static pressure chamber between the air outlet of fan 2 and filter screen 3, the airflow is evenly distributed at filter screen 3, avoiding the problems of local blockage, efficiency reduction, and insufficient heat exchange caused by concentrated or turbulent airflow in traditional designs. At the same time, the uniform airflow reduces system resistance and operating noise, reduces the energy consumption of fan 2, and maintains efficient and stable heat exchange performance under various operating conditions, extending the service life of the heat exchange device.

[0030] like Figure 2 As shown in the embodiment of this application, an air guide component 5 is provided at the air outlet of the fan 2. This air guide component 5 can specifically be a structure such as an air guide grille or louvers, directly integrated at the air outlet of the fan 2, used to control the direction of high-speed airflow. The air guide angle of the air guide component 5 can be dynamically adjusted by an electric actuator, thereby changing the airflow direction of the fan 2. When a certain area of ​​the filter 3 becomes partially blocked, the air guide angle can be adjusted to redirect the airflow to the unblocked area of ​​the filter 3, ensuring uniform airflow dispersion and avoiding concentrated impact or stagnation. By dynamically adjusting the air guide angle, the air guide component 5 effectively solves the problem of unbalanced airflow distribution caused by partial blockage of the filter 3, preventing a sudden drop in filtration efficiency, increased system resistance, and fluctuations in heat exchange performance caused by local airflow overload. Simultaneously, this mechanism extends the service life of the filter 3, reduces maintenance costs, and maintains efficient and stable operation of the device under various operating conditions, further improving the overall system reliability and energy efficiency.

[0031] In the first embodiment, the air guiding component 5 can specifically be an air guiding grille. The air guiding grille is arranged at the air outlet of the fan 2, and its grille structure can divide and guide the airflow. The airflow direction can be controlled by the arrangement and angle adjustment of the grille blades.

[0032] The air guide grille comprises multiple parallel grille blades, which can be rectangular or arc-shaped and fixed to the air outlet of the fan 2 by a grille frame. Appropriate spacing is maintained between the grille blades to ensure that the airflow is segmented and evenly dispersed as it passes through the grille. The grille blades are designed to be adjustable to dynamically adjust the airflow direction. Specifically, the grille blades can be hinged to the grille frame via a rotating shaft, with both ends of the shaft extending out of the grille frame and connecting to a drive mechanism. The drive mechanism can be an electric drive unit 51, such as a micro motor or stepper motor, which drives the grille blades to rotate synchronously via gears, connecting rods, or racks, thereby changing the air guide angle.

[0033] The air guide grille not only evenly disperses the high-speed airflow generated by the fan 2 into the static pressure chamber, but also effectively improves the flow field state when the airflow enters the filter screen 3, avoiding local turbulence or excessively high wind speeds. In addition, by setting or adjusting the angle of the grille blades, the fan 2 blows air into the unblocked area of ​​the filter screen 3, thereby reducing the resistance of the fan 2 during operation and improving the stability and comfort of the equipment operation.

[0034] In the second embodiment, as Figures 9 to 12 As shown, the air guiding assembly includes: multiple air guiding grilles 52 and two electric drive units 51. The multiple air guiding grilles 52 are combined to form an air guiding grille group. The electric drive units 51 are connected to each air guiding grille and can drive the air guiding grille to adjust the grille angle. At the same time, each air guiding grille can independently adjust the grille angle to adjust the airflow direction.

[0035] Specifically, Figure 9The system consists of four vertical columns of air guide grilles. The transmission structure of the two columns on the left is shown in the figure (the transmission structures of the two columns on the right are the same, only the rotation direction of the air guide grilles is opposite). An electric drive unit 51 is connected to a main shaft 53. Each column of air guide grilles 52 is equipped with a drive gear 54 on the main shaft 53, and the drive gear 54 corresponding to the air guide grille 52 closer to the center of the air guide grille group has more teeth. Each air guide grille is connected to the drive gear via a rack 55. The shaft of the air guide grille 52 is equipped with a rotating shaft gear that meshes with the rack (because the driving meshing direction may be different, teeth can be set on different sides of the rack, or additional meshing gears can be added). When the electric drive unit drives the main shaft to rotate forward, the drive gear 54 corresponding to each row of air guide grilles 52 rotates. Since the drive gear 54 corresponding to the air guide grille 52 closer to the center has more teeth, it drives the rack to move a longer distance, thus changing the grille angle of the air guide grille in the middle. The drive gears of the air guide grilles closer to the outer edge have fewer teeth (specifically, the number of teeth is smaller closer to the ends), thus changing the grille angle of the air guide grilles closer to the outer edge less, so that the air blown by the fan can avoid the middle position of the filter and concentrate around or on both sides. This independent adjustment allows the air guide grille to change its angle, ensuring that the air blown by the fan avoids the easily clogged areas in the middle of the filter. Compared to traditional air guide grilles with uniformly adjustable angles, this method provides better airflow and is more suitable for the heat exchange device, thereby improving heat exchange efficiency.

[0036] In a specific embodiment of this application, the air guide assembly further includes a controller, which may be part of a heat exchange device or an air conditioning unit control module, for controlling the air guide angle, i.e., the grille angle.

[0037] The controller controls the fan to run at a preset rated speed and monitors the duty cycle data of the fan motor; The system controls the air guide grille group to switch from the minimum grille angle to the maximum grille angle, or from the maximum grille angle to the minimum grille angle, within a first preset time period (since the actual adjustment angle of each air guide grille is different, this switching can be based on the adjustment of the angle of one air guide grille, for example, using the angle of the air guide grille located in the middle position as the grille angle for adjustment); it captures the duty cycle data group within the first preset time period and associates each duty cycle data with the grille angle of the air guide grille group according to the time parameter; it sets the grille angle associated with the lowest duty cycle data in the duty cycle data group as the grille angle of each air guide grille group.

[0038] This method quickly locates low-resistance areas by angular scanning, adjusts the airflow direction to avoid blockages, and ensures uniform airflow distribution. It requires no manual intervention or additional sensors, relying solely on motor operating parameters for precise optimization, significantly reducing fan energy consumption.

[0039] Since the clogging of the filter varies with different usage times when it is not replaced, that is, the clogging in the middle of the filter will become more and more serious as the usage time increases, in contrast, this application also proposes an embodiment in which the air guide assembly further includes: a controller, which may be part of the heat exchange device or the air conditioning unit control module, for controlling the air guide angle, that is, the grille angle.

[0040] The controller obtains the correspondence between the preset grille angle and the historical start-up time range of the fan. Different historical start-up time ranges of the fan correspond to different grille angles of multiple air guide grilles. Based on the historical operating time range of the cumulative operating time of the wind turbine, the different grid angles of multiple air guide grids are determined, and the grid angles are used to adjust the multiple air guide grids.

[0041] For example, three sequential historical operating time intervals can be set: 15 to 45 days, 45 to 60 days, and over 60 days. The earlier the interval, the smaller the angle of the multiple air guide grilles should be. In actual operation, within one filter replacement cycle, as the fan runs, the air guide grilles will gradually adjust their angles to ensure that the blown air avoids the easily clogged parts in the middle of the filter. Moreover, because the accumulation rate of blockages is different—the filter clogs slowly at the beginning, but once blockage occurs in the middle, the blockage will become more severe—by differentiating the historical operating time of the fan, the air guide grilles can be slightly adjusted in the early stages of blockage, directing airflow slightly to both sides of the filter with a small grille angle adjustment. In the middle and later stages, the air guide grilles can be directed more significantly to both sides of the filter with a larger grille angle adjustment. This extends the service life of the filter while ensuring the air guiding efficiency of the filter during long-term use.

[0042] Based on the historical operating time interval of the cumulative operating time of the wind turbine, the different grid angles of each of the multiple air guide grids are determined, and the multiple air guide grids are adjusted using the grid angles.

[0043] In the embodiments of this application, such as Figure 1 , 5 As shown in Figure 7, the shell 1 is generally box-shaped, and its... Figure 1The upper side of the housing 1 is the air outlet side, with two air outlets equipped with air outlet flanges 12 for easy connection to the duct. The lower side is the air inlet side, with two air outlets equipped with air inlet flanges 11 for easy connection to the duct. A partition 13 with ventilation openings is horizontally arranged in the middle of the housing 1 to divide the housing 1 into a lower air inlet area and an upper air outlet area. The ventilation openings on the partition 13 can be a single opening or several openings arranged in a concentrated manner (or multiple openings and multiple fans 2 can be provided, with one opening corresponding to one fan 2). The shape of the openings can be selected as circular, rectangular, or strip-shaped, depending on the air outlet form of the fan 2. The fan 2 is installed in the lower air inlet area, with the air outlet end of the fan 2 directly aligned with the ventilation opening and attached to the side of the partition 13 in the air inlet area, thus forming a directional airflow channel. In the air outlet area on the other side of the partition 13, a filter screen 3 and a heat exchanger 4 are arranged in sequence.

[0044] The partition 13's regional separation design physically isolates the air inlet and outlet areas, effectively blocking the bypass path of unfiltered air. This forces all airflow to pass through the static pressure chamber for uniform flow before reaching the filter 3 for purification and then entering the heat exchanger 4. The tight fit between the fan 2's outlet and the partition 13 eliminates airflow short-circuiting, improving the filter 3's interception efficiency and the heat exchanger 4's heat exchange uniformity. Furthermore, this structure simplifies airflow direction during operation, avoiding performance fluctuations caused by regional mixing, further reducing system energy consumption and noise levels, while enhancing the device's stability and long-term reliability under complex operating conditions.

[0045] In addition, a sealing or pressing structure can be provided at the joint between the baffle 13 and the fan 2 to ensure that the airflow is guided to the outlet area through the vents without leakage. The number, size and distribution of the vents of the baffle 13 can be optimized according to parameters such as the required system air volume, the number of fans 2, the air velocity and the filter area, so as to balance pressure drop, filtration efficiency and heat exchange performance under different operating conditions.

[0046] In a specific embodiment, a mounting groove for installing the filter screen 3 is provided on the other side of the partition 13 at the position corresponding to the vent. The bottom surface of the mounting groove is the partition 13, that is, the bottom surface is connected to the vent. The filter screen 3 is installed at the top opening of the mounting groove, and its ventilation cross-sectional area is designed to be larger than the area of ​​the vent. Due to the enlarged ventilation cross-section of the mounting groove, the airflow velocity decreases after entering the mounting groove, thereby forming a static pressure cavity in the mounting groove. The structure of the mounting groove can be a rectangular frame or an annular groove, and a sealing strip or limiting structure can be provided on the groove wall to facilitate the stable installation of the filter screen 3 and subsequent replacement and maintenance.

[0047] The static pressure chamber acts as a buffer and equalizes pressure, allowing the high-speed airflow from the vents to diffuse and redistribute before passing evenly across the entire air-receiving surface of the filter screen 3. This avoids uneven pressure and reduced efficiency caused by concentrated airflow impacting localized areas of the filter screen 3, effectively reduces operating noise and vibration, and improves the heat exchange efficiency of the heat exchanger 4.

[0048] In the specific structure, the filter surface of the filter screen 3 is parallel to the partition plate 13, and the heat exchanger 4 is parallel to the filter screen 3 at intervals. The filter screen 3 and the heat exchanger 4 are directly opposite each other, that is, the vent is directly opposite the filter surface of the filter screen 3, and the filter surface of the filter screen 3 is directly opposite the heat exchange surface of the heat exchanger 4. This makes it convenient for the air after passing through the filter screen 3 to reach the heat exchange surface of the heat exchanger 4 evenly, reducing the energy loss of the air changing direction in the middle, thereby improving the heat exchange effect of the heat exchanger.

[0049] In a preferred embodiment, the fan 2 is a volute fan, and the filter 3 is a high-efficiency filter. The volute fan adopts a volute-shaped structure with an internal impeller cavity, which can form a stable centrifugal airflow during rotation, providing high static pressure output and good airflow guidance performance. The volute structure concentrates the airflow at the outlet of the fan 2, facilitating connection with the ventilation opening on the partition 13. The filter 3 is a high-efficiency filter, which can effectively trap fine particulate matter and suspended impurities in the air, ensuring air cleanliness while making it easier to form and maintain a uniform pressure distribution in the static pressure chamber.

[0050] like Figure 3 , 4 As shown in Figure 8, embodiments of this application also propose a method for setting the airflow guide angle, using a heat exchange device. This method automatically sets the airflow guide angle by combining wind resistance and the adjustment state of the airflow guide component, thereby optimizing airflow distribution and energy efficiency. Specifically, it includes the following steps: The fan is controlled to run at a preset rated speed, and the duty cycle data of the fan motor is monitored in real time during operation; the duty cycle data can reflect the load of the fan under different airflow resistance and flow field conditions. The air guide assembly is controlled (either via the unit's controller or a dedicated controller for the air guide assembly) to complete the full range of air guide angle switching within a first preset time period, i.e., gradually switching from the minimum air guide angle to the maximum air guide angle, or gradually switching from the maximum air guide angle to the minimum air guide angle. This ensures that operational data covering all air guide angles is collected within a limited time. During the switching of the air guide component, the duty cycle data group within the first preset time period is captured, and each duty cycle data is associated with the air guide angle at the corresponding time according to the time parameter, thereby forming a one-to-one correspondence between the duty cycle and the air guide angle.

[0051] The air guide angle associated with the lowest duty cycle in the duty cycle data set is set as the final air guide angle of the air guide component. The lowest duty cycle reflects the operating point where the motor load is minimal and the airflow resistance is optimal, and therefore can be used as the preferred value for the air guide angle. This setting method automatically identifies the optimal operating point where system resistance is minimized based on duty cycle data. A lower duty cycle indicates a lighter fan load, reflecting reduced resistance as airflow passes through the filter. Low-resistance areas are quickly located through angle scanning, and the airflow direction is adjusted to avoid blockages, ensuring even airflow distribution. This method requires no manual intervention or additional sensors, relying solely on motor operating parameters for precise optimization, significantly reducing fan energy consumption and improving filtration efficiency and heat exchange stability.

[0052] In a further embodiment of this application, after the air guide angle of the air guide assembly is set, the system begins to re-accumulate the unit's running time. When the accumulated running time reaches a second preset duration, the step of controlling the fan to run at a preset rated speed is executed again, thereby re-calibrating the air guide angle.

[0053] By setting a second preset duration in the runtime dimension, the air guide angle setting can be made periodic and adaptive. As the unit operates for a long time, dust gradually accumulates on the filter screen, the surface condition of the heat exchanger changes, or the fan performance deviates due to environmental factors, all of which can cause the optimal air guide angle to change. By re-executing the air guide angle setting step after the cumulative runtime reaches a predetermined value, the angle setting value of the air guide component can be dynamically corrected, ensuring that the system maintains a low-energy consumption and high-efficiency operating state throughout different operating cycles.

[0054] The second preset duration can be adjusted based on the unit's operating characteristics, air quality, or maintenance cycle. For example, in environments with high dust levels or heavy operating loads, the second preset duration can be appropriately shortened to ensure the system quickly adapts to changes in operating conditions; in environments with clean air or relatively stable loads, the duration can be extended to reduce unnecessary adjustment frequency.

[0055] An embodiment of this application also proposes an air conditioning unit, including the aforementioned heat exchange device, wherein the air conditioning unit determines the optimal air guiding angle of the air guiding component through the aforementioned air guiding angle setting method. By combining the heat exchange device with the air guiding angle setting method, the air conditioning unit can achieve uniform airflow distribution, reduce fan load, improve filtration efficiency and heat exchange efficiency under different operating conditions, while ensuring automatic adjustment and energy efficiency optimization during long-term operation.

[0056] In addition, the air conditioning unit also includes heat exchange main units such as compressors and condensers, which are used in conjunction with heat exchange devices. This is not the focus of this application, so it will not be described in detail.

[0057] Preferably, the air conditioning unit is a fresh air dehumidification unit, meaning the heat exchanger in the heat exchange device is an evaporator. During operation, the fan draws in fresh air from outside into the intake area, passes through the static pressure chamber into the outlet area, where particulate matter is intercepted by a high-efficiency filter, and then flows through the heat exchanger for temperature and humidity regulation, thus achieving the functions of fresh air purification and dehumidification. The air guide assembly adjusts the air guide angle to ensure that the airflow is evenly distributed on the surface of the filter and heat exchanger, reducing pressure loss caused by excessive local wind speed and improving the overall heat exchange efficiency and dehumidification effect of the system.

[0058] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0059] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0060] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A heat exchange device, characterized in that, The device includes a housing, a fan, a filter, and a heat exchanger. The housing has an air inlet side and an air outlet side. Inside the housing, the fan, the filter, and the heat exchanger are arranged sequentially along the air flow direction from the air inlet side to the air outlet side. The area between the air outlet of the fan and the filter forms a static pressure cavity, allowing the airflow to flow evenly through the filter.

2. The heat exchange device according to claim 1, characterized in that, The fan outlet is equipped with an air guide component, which adjusts the airflow direction of the fan towards the filter screen by changing the air guide angle.

3. The heat exchange device according to claim 2, characterized in that, The air guiding assembly includes: a plurality of air guiding grilles, and an electric drive unit connected to each air guiding grille and capable of driving the air guiding grille to adjust the grille angle; Multiple air guide grilles are combined to form an air guide grille group. The angle of each air guide grille can be adjusted independently to adjust the airflow direction.

4. The heat exchange device according to claim 3, characterized in that, The air guide assembly also includes: a controller; The controller controls the fan to operate at a preset rated speed and monitors the duty cycle data of the fan motor; it controls the air guide grille group to switch from the minimum grille angle to the maximum grille angle, or from the maximum grille angle to the minimum grille angle, within a first preset time period; it captures the duty cycle data group within the first preset time period and associates each duty cycle data with the grille angle of the air guide grille group according to the time parameter; it sets the grille angle associated with the lowest duty cycle data in the duty cycle data group as the grille angle of the air guide grille group.

5. The heat exchange device according to claim 3, characterized in that, The air guiding assembly also includes: a controller. The controller obtains the correspondence between the preset grille angle and the historical start-up time interval of the fan. Different historical start-up time intervals of the fan correspond to different grille angles of multiple air guide grilles. Based on the historical start-up time interval in which the cumulative start-up time of the fan is located, the controller determines the different grille angles of multiple air guide grilles and adjusts the multiple air guide grilles using the grille angles.

6. The heat exchange device according to claim 2, characterized in that, The housing is equipped with a partition with a vent, which divides the housing into an air inlet area and an air outlet area. The fan is installed in the air inlet area, and the air outlet is directly opposite the vent and is attached to the side of the partition located in the air inlet area. The filter and heat exchanger are installed in the air outlet area on the other side of the partition.

7. The heat exchange device according to claim 6, characterized in that, On the other side of the partition, corresponding to the position of the vent, there is a mounting groove for installing the filter screen. The ventilation cross-section of the mounting groove is larger than the area of ​​the vent, so that a static pressure cavity is formed in the mounting groove.

8. The heat exchange device according to claim 2, characterized in that, The filter screen is arranged parallel to and spaced apart from the heat exchanger, and the filter surface of the filter screen faces the heat exchange surface of the heat exchanger.

9. A method for setting the air guide angle, characterized in that, Using the heat exchange device as described in any one of claims 2 to 4, 6 to 8, includes the following steps: The fan is controlled to operate at a preset rated speed, and the duty cycle data of the fan motor is monitored; The air guiding component is controlled to switch from the minimum air guiding angle to the maximum air guiding angle, or from the maximum air guiding angle to the minimum air guiding angle, within a first preset time period. Capture the duty cycle data set within the first preset time period, and associate each duty cycle data with the air guiding angle of the air guiding component according to the time parameter; Set the air guide angle associated with the lowest duty cycle data in the duty cycle data group as the air guide angle of the air guide component.

10. The method for setting the air guide angle as described in claim 9, characterized in that, After the air guide angle of the air guide assembly is set, the running time of the unit is re-accumulated, and when the accumulated running time of the unit reaches the second preset time, the step of controlling the fan to run at the preset rated speed is re-executed.

11. An air conditioning unit, characterized in that, The air conditioning unit includes the heat exchange device as described in any one of claims 1 to 8.

12. The air conditioning unit according to claim 11, characterized in that, The air conditioning unit is a fresh air dehumidification unit.

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