A dehumidification device and method for an air source heat pump array having a function of weakening a cold and wet island

Abstract

The application relates to an air exhaust device and method for an air source heat pump array with a function of weakening a cold and wet island, and relates to the technical field of air source heat pump application. Air source heat pump units are arranged in an array to form a unit group, a flow separation plate connects the top end of the unit group, an air exhaust fan array is installed in the center area of the flow separation plate, a start-stop control mode or a rotating speed control mode is adopted, a temperature and humidity monitoring probe monitors the temperature and relative humidity of air below the air exhaust fan in real time, a meteorological detection device collects environmental temperature, environmental relative humidity and environmental wind direction azimuth, a central control module executes logic control on the start-stop or rotating speed adjustment of the air exhaust fan, and the central control module divides main control air exhaust fans and auxiliary air exhaust fans to realize main and auxiliary joint start and cooperative air exhaust. Through cooperative monitoring and control of the air exhaust fan and the surrounding environment, efficient air exhaust of the air source heat pump array is realized, and the operation efficiency and stability of the unit are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of air source heat pump application technology, specifically a dehumidification device and method for air source heat pump arrays that reduces the function of cold and humid islands. Background Technology

[0002] Air source heat pumps, as a clean, efficient, economical, energy-saving, and low-energy-consumption heating technology, are similar to heat pump air conditioners in that they utilize heat from the air for heating, and are of great significance in promoting the low-carbon transformation of heating systems. With the continuous expansion of application scale and the increasing heating area of ​​individual projects, the number of air source heat pumps required has increased accordingly, forming densely arranged air source heat pump arrays.

[0003] Under dense array conditions, airflow and exchange between the central area of ​​the array and the external environment are obstructed, easily leading to the accumulation of cold and humid air and creating a significant cold-humidity island effect. Compared to simple cold air accumulation, if the humid air generated during the defrosting process is not promptly discharged from the array, it will be drawn into neighboring units, significantly accelerating the frosting rate and defrosting frequency of those units, directly resulting in decreased system energy efficiency and reduced operational stability. Therefore, developing efficient humid air discharge technology is crucial for maintaining the performance of air-source heat pump arrays.

[0004] To address the cold and humid island effect, existing technologies primarily employ methods such as increasing the spacing between units or elevating the overall structure. However, these solutions require significant space constraints and high construction costs, making implementation difficult. In recent years, the industry has gradually adopted horizontal baffle technology to mitigate the cold island effect. While this technology effectively blocks the return path of cold air, it cannot solve the humid island effect problem and may even exacerbate the accumulation of humid air below the baffle due to changes in airflow organization. The core reason is that the humid island effect mainly originates from the humid air generated during the defrosting process of air-source heat pump units. This humid air is generated below the baffle and is difficult to effectively control using passive baffle structures.

[0005] In summary, there is an urgent need for an active humid air control solution, especially suitable for air source heat pump array systems with installed baffles, to achieve accurate identification and efficient removal of humid air accumulation. Summary of the Invention

[0006] To address the problem of exacerbated cold and humid island effects and increased defrosting frequency caused by the accumulation of humid air generated during defrosting within air source heat pump arrays, this invention provides a dehumidification device and method for air source heat pump arrays that reduces the cold and humid island effect. Through coordinated monitoring and control of the dehumidification fan and the surrounding environment, it achieves efficient discharge of humid air from the air source heat pump array, ensuring the unit's operating efficiency and stability.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A dehumidification device for an air source heat pump array that reduces the cold and humid island function includes a baffle plate, a dehumidification fan, an air source heat pump unit, a temperature and humidity monitoring probe, a meteorological detection device, and a central control module;

[0009] The air source heat pump unit is equipped with a heat pump axial flow fan on the top. Multiple air source heat pump units are arranged in an array to form a unit group. The baffle plate directly connects and positions the top of all the air source heat pump bodies.

[0010] The dehumidifying fan adopts a start-stop control mode or a speed control mode. In the start-stop control mode, a backflow preventer is configured. Multiple dehumidifying fans are arranged in an array and installed in the central area of ​​the baffle plate. The power supply circuit of each dehumidifying fan is equipped with a current or power monitoring device to monitor the operating status.

[0011] The temperature and humidity monitoring probes are installed below each exhaust fan to monitor the temperature t of the air below the exhaust fan in real time. fi and relative humidity (RH) fi ;

[0012] The meteorological monitoring equipment is located around the unit group and is used to collect ambient temperature data. a Ambient relative humidity (RH) a and environmental wind direction and azimuth angle d a ;

[0013] The central control module is used to receive monitoring parameters collected by temperature and humidity monitoring probes and meteorological detection equipment, as well as the operating status of each dehumidification fan, and execute control logic. It controls the start and stop or speed adjustment of the dehumidification fan according to the monitoring parameters, and divides the main control dehumidification fan and the auxiliary dehumidification fan to achieve coordinated dehumidification by starting the main and auxiliary fans together.

[0014] Furthermore, a rectangular box with open top and bottom is added to the top of the air source heat pump body to enclose the heat pump axial flow fan, and then a baffle plate is used to connect and position the top of all the rectangular boxes.

[0015] Furthermore, the classification logic for the dehumidification fans is as follows: if the relative humidity (RH) of the air below a certain dehumidification fan is... fi Compared to ambient relative humidity (RH) a The temperature of the air below the exhaust fan exceeds the set ratio ε, or the temperature t is higher than the set ratio. fi Above ambient temperature t a When a certain exhaust fan is in use, it is determined that the exhaust fan is the main control exhaust fan. If there is a main control exhaust fan with a spatially adjacent relationship on any side of a certain exhaust fan, the exhaust fan is determined to be an auxiliary exhaust fan.

[0016] Furthermore, the partitioning logic of the dehumidification fan also includes: based on the environmental wind direction azimuth angle d a Identify the downwind area of ​​the unit group; the exhaust fans in this area are also identified as auxiliary exhaust fans.

[0017] A dehumidification method for an air-source heat pump array with reduced cold and humid island function, for start-stop control mode, includes the following steps:

[0018] S1. Assign a unique number to each exhaust fan, denoted as fi, to represent the i-th fan, and configure the linkage identifier parameter C. fi When C fi When ="main", it indicates that the system is determined to be the main control exhaust fan; when C fi When ="aux", it indicates that it is determined to be an auxiliary dehumidification fan; when C fi The value "none" indicates that the machine is currently in a stopped state, and the dehumidifier fan is initialized to C. fi The value is set to "none", and then uploaded to the central control module for dynamic updates.

[0019] S2. Establish a polar coordinate system consistent with the meteorological wind direction standard, with the geometric center of the unit group as the origin of the polar coordinate system. Under this coordinate system, pre-measure and record the azimuth angle d of each exhaust fan relative to the geometric center of the unit group. fi And upload it to the central control module;

[0020] S3. Real-time acquisition of environmental status parameters of the unit group, including ambient temperature t. a Ambient relative humidity (RH) a and environmental wind direction and azimuth angle d a And upload it to the central control module;

[0021] S4, Based on the environmental wind direction and azimuth angle d a Calculate the azimuth range D of the downwind fan. down-wind ;

[0022] S5. Real-time temperature (t) of the air below each exhaust fan. fi and relative humidity (RH) fi And upload it to the central control module;

[0023] S6. Real-time acquisition of operating status parameters of each exhaust fan. fi When S is in the startup state fi =on, when S is in a stopped state fi =off, and upload to the central control module;

[0024] S7, The central control module controls the operating status parameter S fi Determine each one individually, when S fiWhen =on, the system enters the running time determination phase. If the running time of this dehumidification fan exceeds 30 minutes, it will be turned off; otherwise, it will maintain the current state and continue to run. When S fi =off proceeds to step S8;

[0025] S8, Central control module for relative humidity (RH) fi Make a judgment if RH fi -RH a >ε, where ε is a set ratio, which determines the state parameter S of the dehumidification fan. fi Set it to "on" and set the linkage identifier parameter C. fi Set it to "main" and record the running time; otherwise proceed to step S9.

[0026] S9, Central control module controls temperature t fi Make a judgment if t fi >t a The status parameter S of the dehumidification fan fi Set it to "on" and set the linkage identifier parameter C. fi Set it to "main" and record the running time; otherwise, proceed to step S10.

[0027] S10. The central control module determines whether each exhaust fan is located downwind. If the azimuth angle d of the exhaust fan is... fi Located in the downwind azimuth range D down-wind Inside, the status parameter S of the dehumidification fan is... fi Set it to "on" and set the linkage identifier parameter C. fi Set to "aux" and record the running time; otherwise proceed to step S11.

[0028] S11. The central control module determines whether each exhaust fan is in sync with the linkage indicator parameter C. fi =The main exhaust fan has a spatial adjacency relationship. If so, the state parameter S of the exhaust fan is... fi Set it to "on" and set the linkage identifier parameter C. fi Set it to "aux" to record the runtime.

[0029] A dehumidification method for an air-source heat pump array with reduced cold and humid island function, targeting a speed control mode, includes the following steps:

[0030] S1. Assign a unique number to each exhaust fan, denoted as fi, to represent the i-th fan, and configure the linkage identifier parameter C. fi When C fi When ="main", it indicates that the system is determined to be the main control exhaust fan; when C fi When ="aux", it indicates that it is determined to be an auxiliary dehumidification fan; when C fiThe value "none" indicates that the machine is currently in a stopped state, and the dehumidifier fan is initialized to C. fi The value is set to "none", and then uploaded to the central control module for dynamic updates.

[0031] S2. Establish a polar coordinate system consistent with the meteorological wind direction standard, with the geometric center of the unit group as the origin of the polar coordinate system. Under this coordinate system, pre-measure and record the azimuth angle d of each exhaust fan relative to the geometric center of the unit group. fi And upload it to the central control module;

[0032] S3. Real-time acquisition of environmental status parameters of the unit group, including ambient temperature t. a Ambient relative humidity (RH) a and environmental wind direction and azimuth angle d a And upload it to the central control module;

[0033] S4, Based on the environmental wind direction and azimuth angle d a Calculate the azimuth range D of the downwind fan. down-wind ;

[0034] S5. Real-time temperature (t) of the air below each exhaust fan. fi and relative humidity (RH) fi And upload it to the central control module;

[0035] S6. The central control module collects the speed parameters N of each exhaust fan in real time. fi ;

[0036] S7. If the speed N of the exhaust fan is... fi If the fan speed is 100%, then the running time is judged. If the running time exceeds 30 minutes, the speed of the exhaust fan is reduced to 30%. If the running time does not exceed 30 minutes, the current speed is maintained and the fan continues to run. If the exhaust fan speed N fi If it is not at 100% speed, proceed to step S8;

[0037] S8. The central control module determines the air condition parameters below the exhaust fan. If the RH... fi -RH a >ε or t fi >t a ε is a set ratio, which increases the speed of the dehumidifying fan to 100%, triggering the linkage indicator parameter C. fi Set it to "main" and record the running time; otherwise proceed to step S9.

[0038] S9. If the speed N of the exhaust fan is... fi If the speed is 80%, then proceed to the running time determination; if the speed N of the dehumidifying fan... fi If it is not at 80% speed, proceed to step S10;

[0039] S10. The central control module determines whether each exhaust fan is located downwind. If the azimuth angle d of the exhaust fan is... fi Located in the downwind azimuth range D down-wind Inside, increase the speed of the dehumidifying fan to 80%, and set the linkage indicator parameter C. fi Set to "aux" and record the running time; otherwise proceed to step S11.

[0040] S11. If the speed N of the dehumidification fan is... fi If the speed is 60%, then proceed to the running time determination; if the speed N of the exhaust fan... fi If it is not 60% speed, proceed to step S12;

[0041] S12, The central control module determines whether each exhaust fan is in sync with the linkage indicator parameter C. fi =main's main exhaust fan has a spatial adjacency relationship. If so, the speed of the exhaust fan will be increased to 60%, and the linkage identifier parameter C will be set. fi Set to "aux" to record the running time; otherwise, keep the speed of the dehumidifier fan at 30%.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] 1. Based on the precise control mechanism of air temperature and humidity parameters below the dehumidification fan, by monitoring the temperature and humidity status of each area below the baffle plate in real time, the start-stop status or operating speed of the dehumidification fan is dynamically adjusted, which can timely and accurately discharge the humid air generated during the defrosting process of the air source heat pump unit, significantly reduce the frosting rate and defrosting frequency of each unit in the array, and improve the overall operating efficiency of the system.

[0044] 2. A coordinated control strategy for main and auxiliary fans is adopted. When the accumulation of humid air in a specific area is detected, not only is the main exhaust fan at that location activated, but the auxiliary exhaust fan that is spatially adjacent to it is also automatically activated to form a local dehumidification network. Through the coordinated action of the fan group, the efficiency of humid air discharge is effectively enhanced, and the continuous accumulation of humid air in the local area of ​​the array is avoided.

[0045] 3. It has the ability to adaptively adjust the ambient wind direction. Based on real-time ambient wind direction data, it can accurately identify the dehumidification fan located in the downwind area of ​​the array and start it (or increase its speed), effectively improving the air intake conditions of the downwind unit. It specifically solves the technical problem that the downwind air source heat pump unit is easily affected by the cold / humid air discharged by the upwind unit, and effectively weakens the overall cold and humid island effect of the array.

[0046] 4. Through multi-parameter collaborative sensing and control strategies, real-time monitoring and precise regulation of the distribution of humid air inside the air source heat pump array are achieved. While reducing the energy consumption of the exhaust fan, the efficiency of humid air exhaust is greatly improved, effectively ensuring the heating performance and operational stability of the air source heat pump array. Attached Figure Description

[0047] Figure 1 This is a flowchart of the fan control process using the start-stop control mode in the dehumidification method of the present invention;

[0048] Figure 2 This is a flowchart of the fan control process using the speed control mode in the dehumidification method of this invention;

[0049] Figure 3 This is a flowchart illustrating the calculation of the azimuth angle of the downwind fan in the dehumidification method of this invention.

[0050] Figure 4 This is a schematic diagram of the overall structure of the dehumidification device of the present invention, which incorporates a rectangular box.

[0051] Figure 5 This is a schematic diagram of the overall structure of the dehumidification device of the present invention without a rectangular box.

[0052] Figure 6 This is a schematic diagram of the dehumidification fan under the start / stop control mode of the dehumidification device of the present invention;

[0053] Figure 7 This is a schematic diagram of the dehumidification fan in the dehumidification device speed control mode of the present invention;

[0054] Figure 8 This is a schematic diagram of the main and auxiliary dehumidification fans in the dehumidification device of the present invention.

[0055] In the diagram: 1. Baffle plate; 2. Exhaust fan; 3. Air source heat pump unit; 4. Check baffle; 5. Temperature and humidity monitoring probe; 2.1. Main exhaust fan; 2.2. Auxiliary exhaust fan. Detailed Implementation

[0056] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0057] like Figures 4-7 As shown, a dehumidification device for an air source heat pump array with reduced cold and humid island function includes a baffle plate 1, a dehumidification fan 2, an air source heat pump unit 3, a backflow preventer 4, and a temperature and humidity monitoring probe 5.

[0058] Multiple air-source heat pump units 3 are arranged in an array to form a unit group, with a heat pump axial flow fan installed on the top of each air-source heat pump body 7. According to operating requirements, baffles 1 are used to directly connect and position the tops of all air-source heat pump bodies 7 (see [reference]). Figure 5 (as shown), or a rectangular box with open top and bottom is added to the top of each air source heat pump body 7 to enclose the heat pump axial flow fan, and then the top of all the rectangular boxes are connected and positioned using baffles 1 (see...). Figure 4 (As shown).

[0059] Multiple dehumidifying fans 2 are arranged in an array in the central area of ​​the baffle plate 1. The dehumidifying fans 2 have two modes: start-stop control and speed control. In the start-stop control mode, a check baffle 4 is required to isolate the fan mounting holes when the dehumidifying fans 2 are stopped, preventing cold air above the baffle plate 1 from sinking down through the fan mounting holes and entering the unit group. The check baffle 4 can be installed above the dehumidifying fans 2 according to space requirements (see [reference]). Figure 6 (as shown in section b) or below (see section b) Figure 6 (As shown in Part a); In the speed control mode, the exhaust fan 2 can run continuously and is not affected by the shutdown of the air source heat pump unit 3, so there is no need to configure the check baffle 4 (see Part a). Figure 7 (As shown).

[0060] Install a temperature and humidity monitoring probe 5 below each exhaust fan 2 (see below). Figures 6-7 As shown, the device monitors the temperature and relative humidity of the air below each exhaust fan 2 in real time. At the same time, meteorological detection equipment is configured around the unit group to collect ambient temperature, ambient relative humidity and ambient wind direction and azimuth parameters. Each exhaust fan 2 is equipped with a current or power monitoring device in its power supply circuit to monitor the fan's operating status. In addition, the device also includes a central control module to receive various monitoring parameters and execute control logic.

[0061] Through comparative analysis, when the relative humidity of the air below the exhaust fan 2 exceeds the ambient relative humidity by 15 percentage points, or when the temperature of the air below the exhaust fan 2 is higher than the ambient temperature, it is determined that the air source heat pump unit 3 in that area is in defrost mode, indicating the accumulation of humid air. Figure 8As shown, at this time, the corresponding dehumidifying fan 2 is started or its speed is increased, and this dehumidifying fan 2 is marked as the main control dehumidifying fan 2.1. Further analysis of the spatial adjacency relationship of each dehumidifying fan 2 in the unit group reveals that if a main control dehumidifying fan 2.1 exists on any side of a certain dehumidifying fan 2, then that dehumidifying fan 2 is started or its speed is increased, and it is marked as the auxiliary dehumidifying fan 2.2. Additionally, based on the environmental wind direction and azimuth, the downwind area of ​​the unit group is identified, and the dehumidifying fans 2 in this area are started or their speeds are increased, also marked as auxiliary dehumidifying fans 2.2. Through the above marking method, the dehumidifying fans 2 are divided into main control dehumidifying fans 2.1 and auxiliary dehumidifying fans 2.2, and dehumidification is coordinated through the simultaneous start-up of the main and auxiliary fans. Finally, the cumulative running time of each dehumidifying fan 2 since its most recent start-up or speed increase is counted. When the running time of any dehumidifying fan 2 exceeds 30 minutes, that dehumidifying fan 2 is shut down or its speed is reduced.

[0062] Example 1

[0063] like Figure 1 , Figures 3-8 As shown, a dehumidification method for an air-source heat pump array with reduced cold and humid island function is provided. This method is applicable to start-stop control mode and includes the following steps:

[0064] S1. Initialize the exhaust fan number and linkage identifier parameters;

[0065] Each exhaust fan 2 is uniquely numbered, with fi representing the i-th fan, where i is a positive integer. For example, f1, f2, f3, f4, f5... correspond to fans 1, 2, 3, 4, 5, and so on.

[0066] Configure a linkage identification parameter C for each dehumidification fan 2. fi This characterizes its operational role in the current control cycle: when C fi When "="main is displayed, it indicates that the fan is designated as the main dehumidification fan 2.1, undertaking the main dehumidification task; when C... fi When ="aux", it indicates that the fan is identified as an auxiliary dehumidification fan 2.2 for collaborative dehumidification; when C fi When ="none", it indicates that the fan is currently in a stopped state and is not participating in dehumidification operation. Linkage indicator parameter C fi The value is dynamically updated based on the temperature and relative humidity of the air below the exhaust fan 2 and its actual start / stop status.

[0067] During the initial, pre-start phase of the device, all exhaust fans 2 are in a stopped state. At this time, the system will set the linkage indicator parameter C for each fan. fi Initialize all values ​​to "none". Then, assign each exhaust fan 2 its number fi and its corresponding linkage identifier parameter C. fiIt is uploaded to the central control module as the basis for subsequent control logic execution.

[0068] S2. Obtain the azimuth angle d of the dehumidification fan in the air source heat pump array. f ;

[0069] To identify the exhaust fans 2 located downwind of the ambient wind direction and implement targeted control strategies, the spatial orientation of each exhaust fan 2 within the array needs to be determined. Specifically, a polar coordinate system consistent with meteorological wind direction standards is established, with the geometric center of the unit group as the origin: North (N) is defined as 0°, and clockwise directions are defined as East as 90°, South as 180°, and West as 270°. The angle definition method of this coordinate system is consistent with the subsequent ambient wind direction azimuth angle d. a The measurement standards are kept consistent to ensure that the orientation comparisons are physically comparable.

[0070] In this coordinate system, the azimuth angle d of each exhaust fan 2 relative to the geometric center of the unit group is measured and recorded in advance. fi (Unit: °), then, number each exhaust fan 2 fi and its corresponding azimuth angle d. fi Upload to the central control module.

[0071] S3. Real-time acquisition of ambient air state parameters near the air source heat pump array;

[0072] Meteorological monitoring equipment was installed at suitable locations around the unit group as an environmental condition parameter acquisition module. This module acquires the environmental condition parameters of the unit group in real time, including the ambient temperature t. a (Unit: °C), Ambient relative humidity RH a (Unit: %) and environmental wind direction and azimuth angle d a (Unit: °), the collected data is uploaded to the central control module in real time through the communication interface.

[0073] S4. Calculate the azimuth range of the downwind fan;

[0074] According to the environmental wind direction and azimuth angle d a , combined Figure 3 As shown, the azimuth range of the downwind wind turbine position is calculated as follows:

[0075] Calculate the center position d of the azimuth angle range of the downwind wind turbine. center =(d a +180°) mod 360°;

[0076] Minimum value d of the azimuth angle range of downwind wind turbines min =(d center –45°+360°)mod360°;

[0077] The maximum value of the azimuth angle range of downwind wind turbines d max =(d center +45°) mod 360°;

[0078] If d min <d max Then the azimuth range D of the downwind fan down-wind For: [d min ,d max ];

[0079] If d min ≥d max Then the azimuth range D of the downwind fan down-wind For: [d min [360°] and [0°, d] max ];

[0080] Here, mod represents the modulo operation, which is the remainder after division.

[0081] S5. Real-time collection of air status parameters below each exhaust fan;

[0082] The air condition parameters below the dehumidifying fan 2 are the same as those below the baffle plate 1. The temperature t of the air below the dehumidifying fan 2 is obtained in real time through the temperature and humidity monitoring probe 5. fi and relative humidity (RH) fi And upload it to the central control module.

[0083] S6. Real-time collection of operating status parameters of each exhaust fan;

[0084] To accurately monitor the current operating status of each dehumidifier fan 2, a current or power monitoring device is installed in the power supply circuit. When the dehumidifier fan 2 is in the start-up state, its current or power signal exceeds a preset threshold, and the central control module determines its operating status parameter S based on this. fi =on; When the dehumidifying fan 2 is in the off state, its current or power signal is lower than the preset threshold, and the central control module determines its operating status parameter S accordingly. fi =off, the running status parameter S fi Uploaded to the central control module in real time.

[0085] S7, The central control module controls the status parameter S. fi Judge one by one;

[0086] If the determination result is the start state, i.e., S fiIf the value is on, the running time determination will be entered. If the running time Time(fi) of this dehumidifier fan 2 is greater than 30 minutes, then this dehumidifier fan 2 will be turned off. If the running time Time(fi) of this dehumidifier fan 2 is less than or equal to 30 minutes, then this dehumidifier fan 2 will continue to run in the current state.

[0087] If the determination result is a shutdown state, i.e., S fi If the value is off, proceed to step S8.

[0088] S8, Central control module for relative humidity (RH) fi Make a judgment;

[0089] If the relative humidity (RH) of the air below the dehumidifier fan 2 fi Compared to ambient relative humidity (RH) a 15 percentage points higher (i.e., meeting RH) fi -RH a If the humidity level is >15%, it is determined that the area corresponding to the exhaust fan 2 is in the unit defrosting state, and the local accumulation of humid air is already quite significant, posing a risk of exacerbating the cold and humidity island effect. In this situation, the central control module starts the exhaust fan 2 to accelerate the discharge of humid air, thereby suppressing the accumulation of local humidity. At the same time, the status parameter S of the exhaust fan 2 is adjusted. fi Setting it to "on" indicates that the fan is in operation, and the linkage identifier parameter C will be set accordingly. fi Set it to "main" and start recording the running time of the dehumidification fan 2, Time(fi).

[0090] If the relative humidity (RH) of the air below the dehumidifier fan 2 fi Not compared with ambient relative humidity (RH) a 15 percentage points higher (i.e., meeting RH) fi -RH a If the percentage is ≤15%, proceed to step S9.

[0091] S9, Central control module controls temperature t fi Make a judgment;

[0092] If the temperature of the air below the exhaust fan 2 is t fi Above ambient temperature t a The system determines that the area corresponding to the exhaust fan 2 is currently in the defrosting state, and the hot and humid airflow generated during defrosting has diffused into this area, causing a local increase in air temperature. The presence of this hot and humid airflow may exacerbate the risk of frost formation. In this situation, the central control module activates the exhaust fan 2 to accelerate the discharge of hot and humid air, thereby suppressing the accumulation of local humidity. Simultaneously, the status parameter S of the exhaust fan 2 is updated. fi Setting it to "on" indicates that the fan is in operation, and the linkage identifier parameter C will be set accordingly. fiSet it to "main" and start recording the running time of the dehumidification fan 2, Time(fi).

[0093] Steps S8 and S9 compare the relative humidity and temperature of the air below the exhaust fan 2 with the ambient air. This is to address the situation where one of the temperature and humidity monitoring probes 5 is damaged, and to address the situation where the temperature and humidity monitoring probes 5 have different sensitivities and fail to identify the situation where the relative humidity below the exhaust fan 2 is high in time.

[0094] If the relative humidity and temperature of the air below the dehumidifier 2 meet the above requirements, then the linkage indicator parameter C of this dehumidifier 2 will be activated. fi Setting it to "main" is intended to identify that the exhaust fan 2 is currently participating in the system's coordinated control as the main exhaust fan 2.1, providing a logical basis for subsequent multi-fan coordinated operation strategies.

[0095] If the temperature of the air below the exhaust fan 2 is t fi Not higher than the ambient temperature t a Then proceed to step S10.

[0096] S10. The central control module determines whether each exhaust fan is located downwind.

[0097] If the azimuth angle of the exhaust fan 2 is d fi Within the azimuth range D of the downwind wind turbine down-wind If the exhaust fan 2 is located downwind of the array, then the exhaust fan 2 is considered to be in this position. At this time, the exhaust fan 2 is started, and the state parameter S... fi Set to "on", linking the flag parameter C fi Set it to "aux" and start recording runtime (Times(fi)).

[0098] This control measure is based on the physical characteristic that the downwind air source heat pump unit 3 has difficulty drawing in high-temperature ambient air. By starting the dehumidification fan 2 in the downwind area, the suction force on the ambient air is enhanced, prompting the air source heat pump unit 3 to draw in more high-temperature ambient air from the upwind direction. At the same time, due to the obstruction effect of the baffle plate 1, even if the dehumidification fan 2 is started, the cold air discharged above the air source heat pump unit 3 cannot directly settle back into the array, thereby effectively mitigating the cold and humid island effect.

[0099] S11. Wind turbine group control strategy based on linkage identifier;

[0100] The central control module determines whether each exhaust fan 2 is in sync with the linkage indicator parameter C. fi =The main control exhaust fan 2.1 has a spatial adjacency relationship, that is, this exhaust fan 2 is located around the main control exhaust fan 2.1. If a spatial adjacency relationship exists, this exhaust fan 2 will be started, and the state parameter S fiSet to "on", linking the flag parameter C fi Set it to "aux" and start recording runtime (Times(fi)).

[0101] This strategy aims to enhance the efficiency of humid air exhaust by activating the auxiliary exhaust fan 2.2 adjacent to the main exhaust fan 2.1, forming a local exhaust network. This enables multiple fans to work together, effectively preventing humid air from accumulating in local areas of the array and improving the overall exhaust effect.

[0102] S12. Repeat all the above processes for each of the exhaust fans every 1 minute.

[0103] This measure aims to monitor the air condition below the exhaust fan 2 in real time so that the hot and humid air generated during defrosting can be discharged in a timely manner, preventing it from accumulating below the baffle plate.

[0104] Example 2

[0105] like Figures 2-8 As shown, a dehumidification method for an air-source heat pump array with reduced cold and humid island function is provided. This method is applicable to speed control mode and includes the following steps:

[0106] In speed control mode, steps S1-S5 are the same as in start-stop control mode, and subsequent steps are as follows:

[0107] S6. Real-time acquisition of the rotational speed parameters of each exhaust fan;

[0108] Each exhaust fan 2 is a variable frequency fan, and the speed N of each exhaust fan 2 is monitored in real time through a variable frequency control module. fi .

[0109] S7, The central control module determines the speed N of the exhaust fan. fi Is it 100% speed?

[0110] The central control module controls the rotational speed N of the exhaust fan 2. fi Make a judgment; if the judgment result is 100% rotational speed (i.e., N), fi =N 100% If the running time of the exhaust fan 2 (Time(fi)) is greater than 30 minutes, then the speed of the exhaust fan 2 will be reduced to 30% (i.e., N). fi =N 30% If the running time Time(fi) of this dehumidification fan 2 is less than or equal to 30 minutes, then this dehumidification fan 2 will continue to run at the current speed.

[0111] If the result is not 100% rotation speed, proceed to step S8.

[0112] S8. The central control module determines the air condition parameters below the exhaust fan;

[0113] If the relative humidity (RH) of the air below the dehumidifier fan 2 fi Compared to ambient relative humidity (RH) a 15 percentage points higher (i.e., meeting RH) fi -RH a >15%), or the temperature of the air below the exhaust fan 2 (t) fi Above ambient temperature t a If the area below the exhaust fan 2 is severely affected by the defrosting of the air source heat pump unit 3, becoming a high-humidity area, it will further reduce the heating performance of the air source heat pump unit 3. In this case, the central control module increases the speed of the exhaust fan 2 to 100% to expel the high-humidity air as quickly as possible to weaken the humidity island effect, and adjusts the linkage indicator parameter C. fi Set to "main" to start recording the running time (Times(fi)) of this dehumidification fan 2 at the current speed.

[0114] If the relative humidity (RH) of the air below the dehumidifier fan 2 fi Not compared with ambient relative humidity (RH) a 15 percentage points higher (i.e., meeting RH) fi -RH a ≤15%), or the temperature t of the air below the exhaust fan 2 fi Not higher than the ambient temperature t a Then proceed to step S9.

[0115] S9, The central control module determines the speed N of the exhaust fan. fi Is it 80% speed?

[0116] The central control module controls the rotational speed N of the exhaust fan 2. fi Make a judgment; if the judgment result is 80% speed (i.e., N) fi =N 80% If the result is not 80% speed, then proceed to step S10.

[0117] S10. The central control module determines whether each exhaust fan is located downwind.

[0118] If the azimuth angle of the exhaust fan 2 is d fi Within the azimuth range D of the downwind wind turbine down-wind If the location is within the array, then the dehumidification fan 2 is considered to be downwind. At this point, the speed of the dehumidification fan 2 is increased to 80%, and the linkage parameter C is activated. fi Set it to "aux" and start recording runtime (Times(fi)).

[0119] If the azimuth angle of the exhaust fan 2 is d fi Not within the azimuth range of the downwind fan (D) down-wind If the process continues, proceed to step S11.

[0120] S11, The central control module determines the speed N of the exhaust fan. fi Is it 60% speed?

[0121] The central control module controls the rotational speed N of the exhaust fan 2. fi Make a judgment; if the judgment result is 60% rotational speed (i.e., N... fi =N 60% If the result is not 60% speed, then proceed to step S12.

[0122] S12. Wind turbine group control strategy based on linkage identifier;

[0123] The central control module determines whether each exhaust fan 2 is in sync with the linkage indicator parameter C. fi =The main control exhaust fan 2.1 has a spatial adjacency relationship, meaning this exhaust fan 2 is located around the main control exhaust fan 2.1. If a spatial adjacency relationship exists, the speed of this exhaust fan 2 will be increased to 60%, and the linkage indicator parameter C will be activated. fi Set it to "aux" and start recording runtime (Times(fi)).

[0124] If there is no spatial adjacency, the speed of this dehumidification fan 2 shall be kept at 30%.

[0125] S13. Repeat the above process for each of the exhaust fans every 1 minute.

[0126] The aforementioned control method, based on the dehumidifying fan 2 system integrated on the baffle plate 1, implements precise fan start / stop or speed control strategies by real-time monitoring of the temperature and humidity parameters of the air below each dehumidifying fan 2, as well as the ambient temperature, humidity, and wind direction parameters. When humid air accumulation is detected in a specific area, the system activates the main dehumidifying fan 2.1 at the corresponding location, simultaneously activating the auxiliary dehumidifying fan 2.2 adjacent to it, forming a local dehumidification network to accelerate the discharge of humid air. In addition, the system dynamically identifies the downwind area of ​​the array based on the ambient wind direction and activates the dehumidifying fan 2 in that area, effectively improving the air intake conditions of the downwind units and mitigating the cold and humid island effect exacerbated by the cold and humid air discharged from the upwind units being blown downwind by the ambient wind.

[0127] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0128] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dehumidification device for an air-source heat pump array that reduces the cold and humid island effect, characterized in that: Includes baffle plate (1), dehumidification fan (2), air source heat pump unit (3), temperature and humidity monitoring probe (5), meteorological detection equipment and central control module; The air source heat pump unit (3) is equipped with a heat pump axial flow fan on the top. Multiple air source heat pump units (3) are arranged in an array to form a unit group. The baffle plate (1) directly connects and positions the top of all air source heat pump bodies (7). The dehumidifying fan (2) adopts a start-stop control mode or a speed control mode. In the start-stop control mode, a backflow preventer (4) is configured. Multiple dehumidifying fans (2) are arranged in an array and installed in the central area of ​​the baffle plate (1). The power supply circuit of each dehumidifying fan (2) is equipped with a current or power monitoring device to monitor the operating status. The temperature and humidity monitoring probe (5) is installed below each exhaust fan (2) to monitor the temperature t of the air below the exhaust fan (2) in real time. fi and relative humidity (RH) fi ; The meteorological monitoring equipment is located around the unit group and is used to collect ambient temperature data. a Ambient relative humidity (RH) a and environmental wind direction and azimuth angle d a ; The central control module is used to receive the monitoring parameters collected by the temperature and humidity monitoring probe (5) and the meteorological detection equipment, as well as the operating status of each dehumidification fan (2) and execute the control logic. It controls the start and stop or speed adjustment of the dehumidification fan (2) according to the monitoring parameters, and divides the main control dehumidification fan (2.1) and the auxiliary dehumidification fan (2.2) to achieve coordinated dehumidification by starting the main and auxiliary fans together.

2. A dehumidification device for an air source heat pump array with reduced cold and humid island function according to claim 1, characterized in that: The air source heat pump body (7) is equipped with a rectangular box with open top and bottom to enclose the heat pump axial flow fan. Then, a baffle plate (1) is used to connect and position the top of all the rectangular boxes.

3. A dehumidification device for an air-source heat pump array with reduced cold and humid island function as described in claim 1 or 2, characterized in that: The division logic of the dehumidification fan (2) is as follows: if the relative humidity RH of the air below a certain dehumidification fan (2) is... fi Compared to ambient relative humidity (RH) a The temperature of the air below the dehumidifier (2) is higher than the set ratio ε, or the temperature t is higher than the set ratio ε. fi Above ambient temperature t a When the exhaust fan (2) is determined to be the main exhaust fan (2.1), if there is a main exhaust fan (2.1) with spatial adjacency on any side of a certain exhaust fan (2), the exhaust fan (2) is determined to be the auxiliary exhaust fan (2.2).

4. A dehumidification device for an air source heat pump array with reduced cold and humid island function according to claim 3, characterized in that: The partitioning logic of the dehumidifying fan (2) also includes: based on the environmental wind direction azimuth angle d a Identify the downwind area of ​​the unit group, and the dehumidification fan (2) in this area is also identified as an auxiliary dehumidification fan (2.2).

5. A dehumidification method for an air-source heat pump array that reduces the function of a cold and humid island, characterized in that: According to claim 1, a dehumidification device for an air source heat pump array with reduced cold and humid island function, the dehumidification method for the start-stop control mode includes the following steps: S1. Assign a unique number to each exhaust fan (2), with fi representing the i-th fan, and configure the linkage identification parameter C. fi When C fi When ="main", it indicates that the system is determined to be the main control exhaust fan (2.1); when C fi When ="aux", it indicates that it is determined to be an auxiliary dehumidification fan (2.2); when C fi When "none" is displayed, it indicates that the machine is currently in a stopped state. The initialization of the exhaust fan (2) is C. fi The value is set to "none", and then uploaded to the central control module for dynamic updates. S2. Establish a polar coordinate system consistent with the meteorological wind direction standard, with the geometric center of the unit group as the origin of the polar coordinate system. Under this coordinate system, measure and record the azimuth angle d of each exhaust fan (2) relative to the geometric center of the unit group. fi And upload it to the central control module; S3. Real-time acquisition of environmental status parameters of the unit group, including ambient temperature t. a Ambient relative humidity (RH) a and environmental wind direction and azimuth angle d a And upload it to the central control module; S4, Based on the environmental wind direction and azimuth angle d a Calculate the azimuth range D of the downwind fan. down-wind ; S5. Real-time collection of the air temperature t below each exhaust fan (2) fi and relative humidity (RH) fi And upload it to the central control module; S6. Real-time acquisition of operating status parameters of each exhaust fan (2) fi When S is in the startup state fi =on, when S is in a stopped state fi =off, and upload to the central control module; S7, The central control module controls the operating status parameter S fi Determine each one individually, when S fi =On enters the running time determination. If the running time of this dehumidifying fan (2) is greater than 30 minutes, it will be turned off; otherwise, it will continue to run in the current state. When S fi =off Proceed to step S8; S8, Central control module for relative humidity (RH) fi Make a judgment if RH fi -RH a >ε, ε is the set ratio, which determines the state parameter S of the dehumidification fan (2). fi Set it to "on" and set the linkage identifier parameter C. fi Set it to "main" and record the running time; otherwise proceed to step S9. S9, Central control module controls temperature t fi Make a judgment if t fi >t a The status parameter S of the dehumidification fan (2) fi Set it to "on" and set the linkage identifier parameter C. fi Set it to "main" and record the running time; otherwise, proceed to step S10. S10. The central control module determines whether each exhaust fan (2) is located downwind. If the azimuth angle d of the exhaust fan (2) is... fi Located in the downwind azimuth range D down-wind Inside, the status parameter S of the dehumidification fan (2) is determined. fi Set it to "on" and set the linkage identifier parameter C. fi Set to "aux" and record the running time; otherwise proceed to step S11. S11, The central control module determines whether each exhaust fan (2) is in sync with the linkage indicator parameter C. fi =The main control exhaust fan (2.1) has a spatial adjacency relationship. If so, the exhaust fan (2) state parameter S fi Set it to "on" and set the linkage identifier parameter C. fi Set it to "aux" to record the runtime.

6. A dehumidification method for an air-source heat pump array that reduces the function of a cold and humid island, characterized in that: According to claim 1, a dehumidification device for an air source heat pump array with reduced cold and humid island function, for the speed control mode, the dehumidification method includes the following steps: S1. Assign a unique number to each exhaust fan (2), with fi representing the i-th fan, and configure the linkage identification parameter C. fi When C fi When ="main", it indicates that the system is determined to be the main control exhaust fan (2.1); when C fi When ="aux", it indicates that it is determined to be an auxiliary dehumidification fan (2.2); when C fi When "none" is displayed, it indicates that the machine is currently in a stopped state. The initialization of the exhaust fan (2) is C. fi The value is set to "none", and then uploaded to the central control module for dynamic updates. S2. Establish a polar coordinate system consistent with the meteorological wind direction standard, with the geometric center of the unit group as the origin of the polar coordinate system. Under this coordinate system, measure and record the azimuth angle d of each exhaust fan (2) relative to the geometric center of the unit group. fi And upload it to the central control module; S3. Real-time acquisition of environmental status parameters of the unit group, including ambient temperature t. a Ambient relative humidity (RH) a and environmental wind direction and azimuth angle d a And upload it to the central control module; S4, Based on the environmental wind direction and azimuth angle d a Calculate the azimuth range D of the downwind fan. down-wind ; S5. Real-time collection of the air temperature t below each exhaust fan (2) fi and relative humidity (RH) fi And upload it to the central control module; S6. The central control module collects the speed parameters N of each exhaust fan (2) in real time. fi ; S7. If the rotational speed N of the exhaust fan (2) is... fi If the speed is 100%, then the running time is judged. If the running time exceeds 30 minutes, the speed of the dehumidifying fan (2) is reduced to 30%. If the running time does not exceed 30 minutes, the current speed is maintained and the fan continues to run. If the speed of the dehumidifying fan (2) is N fi If it is not at 100% speed, proceed to step S8; S8. The central control module determines the air condition parameters below the exhaust fan (2). If the RH fi -RH a >ε or t fi >t a ε is a set ratio, which increases the speed of the dehumidifying fan (2) to 100%, and the linkage indicator parameter C fi Set it to "main" and record the running time; otherwise proceed to step S9. S9. If the rotational speed N of the exhaust fan (2) is... fi If the rotation speed is 80%, then the running time determination begins; if the rotation speed N of the exhaust fan (2) is... fi If it is not at 80% speed, proceed to step S10; S10. The central control module determines whether each exhaust fan (2) is located downwind. If the azimuth angle d of the exhaust fan (2) is... fi Located in the downwind azimuth range D down-wind Inside, the speed of the dehumidifying fan (2) is increased to 80%, and the linkage indicator parameter C is set. fi Set to "aux" and record the running time; otherwise proceed to step S11. S11, If ​​the rotational speed N of the exhaust fan (2) is... fi If the rotation speed is 60%, then the running time determination begins; if the rotation speed N of the exhaust fan (2) is... fi If it is not 60% speed, proceed to step S12; S12, The central control module determines whether each exhaust fan (2) is in sync with the linkage indicator parameter C. fi =The main control exhaust fan (2.1) has a spatial adjacency relationship. If so, the speed of the exhaust fan (2) is increased to 60%, and the linkage identifier parameter C is set. fi Set to "aux" to record the running time; otherwise, keep the speed of the dehumidifier (2) at 30%.

Images