A rotary dehumidifier for outdoor electrical cabinets

Abstract

This invention belongs to the field of dehumidification, specifically disclosing a rotary dehumidifier for outdoor electrical cabinets, including a housing, a dehumidification mechanism, a regeneration mechanism, and a controller. The dehumidification mechanism includes a middle frame disposed within the housing, a placement groove on the middle frame, and a dehumidification rotor movably disposed within the placement groove. An exhaust fan is disposed between the cover plate at the front end of the dehumidification rotor and the middle frame. The regeneration mechanism includes a synchronous motor disposed at the input end of the dehumidification rotor. A housing is mounted on the middle frame on one side of the periphery of the dehumidification rotor. A heater is disposed inside the housing at the front end of the dehumidification rotor. A fan is fixedly installed at the air inlet of the housing through an air duct, and an air outlet pipe is fixedly installed at the rear end of the housing. This invention utilizes the principle of rotary dehumidification to expel moisture from inside the cabinet to the outside, is less affected by ambient temperature, and is suitable for use in outdoor electrical cabinets.

Description

Technical Field

[0001] This invention belongs to the field of dehumidification, specifically relating to a rotary dehumidifier for use in outdoor electrical cabinets. Background Technology

[0002] Electrical cabinets are enclosed metal or non-metal enclosures used to house, protect, and manage electrical equipment and wiring. Moisture inside these cabinets can cause various problems, including corrosion and aging of secondary components leading to frequent equipment malfunctions and tripping; reduced insulation performance of internal components causing poor contact or short circuits, even equipment burnout, thus threatening the safe and stable operation of the equipment and the power grid; and increased rust on terminal block screws and connecting plates, leading to poor secondary terminal contact, overheating, or even open circuits. Currently, there are three methods for dehumidifying outdoor electrical cabinets: heaters, semiconductor dehumidifiers, and industrial air conditioners. Due to the harsh working environment of outdoor electrical cabinets, the commonly used dehumidification methods have the following problems and shortcomings:

[0003] First is the heater. The heater reduces relative humidity by raising the temperature, but it cannot reduce the total amount of water vapor. Due to the uneven heating of the heater, condensation is easy to occur on the inner surface of the cabinet away from the heater. Moreover, the presence of the heater increases the risk of electrical fire.

[0004] The second is the semiconductor dehumidifier. The performance of semiconductor dehumidifiers is greatly affected by the ambient temperature. They are suitable for indoor use, but their dehumidification effect is not ideal in high or low outdoor environments. In addition, the dehumidification method of semiconductor dehumidifiers is not effective in removing water from the cabinet.

[0005] Thirdly, there are industrial air conditioners. Functional air conditioners are large in size and can only be used in larger electrical cabinets such as control cabinets. Small electrical cabinets such as terminal boxes cannot be installed. Moreover, industrial air conditioners also have the problems of high failure rate and high maintenance cost. Summary of the Invention

[0006] The purpose of this invention is to provide a rotary dehumidifier for outdoor electrical cabinets. By utilizing the principle of rotary dehumidification, it removes moisture from inside the cabinet to the outside. It is less affected by ambient temperature, has a suitable size for installation in small outdoor electrical cabinets, a simple structure, a low failure rate, and low maintenance costs, thereby solving the problems mentioned in the background art.

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

[0008] A rotary dehumidifier for outdoor electrical cabinets includes a housing, a dehumidification mechanism, a regeneration mechanism, and a controller. The dehumidification mechanism includes a middle frame disposed within the housing, a placement slot on the middle frame, a dehumidification rotor movably disposed within the placement slot, a vent on the middle frame at the bottom of the placement slot, a cover plate installed at the front end of the housing, an exhaust fan disposed between the cover plate at the front end of the dehumidification rotor and the middle frame, and a dry air outlet on the cover plate at the front end of the exhaust fan. The regeneration mechanism includes a synchronous motor disposed at the input end of the dehumidification rotor, an outer casing mounted on the middle frame on one side of the periphery of the dehumidification rotor, a heater disposed within the outer casing at the front end of the dehumidification rotor, a fan fixedly installed at the air inlet of the outer casing via an air duct, and an air outlet pipe fixedly installed at the rear end of the outer casing.

[0009] Preferably, a humid air inlet is provided on the cover plate at the front end of the vent, a filter layer is movably disposed inside the humid air inlet, and a filter screen is movably disposed inside the humid air inlet at the front end of the filter layer.

[0010] Preferably, an mounting plate is fixedly installed on the periphery of the housing.

[0011] Preferably, an air outlet is provided on the middle frame surrounding the fan, an air inlet is provided on the middle frame at the top of the vent, and a return air duct is provided between the air inlet and the air outlet at the rear end of the middle frame.

[0012] Preferably, a rotating frame is provided at the rear end of the dehumidifying impeller, and a gear ring is fixedly installed on the rotating frame surrounding the dehumidifying impeller. A gear is provided at the output end of the synchronous motor, and the gear meshes with the gear ring.

[0013] Preferably, a humid air outlet is fixedly installed at the rear end of the housing, and the humid air outlet is connected to the air outlet pipe.

[0014] Preferably, the controller is mounted on the middle frame at the top of the exhaust fan, and a wiring port is provided on the cover plate around the controller.

[0015] Preferably, a rear frame is provided inside the housing at the rear end of the middle frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention uses an exhaust fan to create negative pressure, drawing humid air from inside the cabinet into the device. The dehumidifying impeller absorbs moisture from the air, drying it. The exhaust fan then discharges the dried air into the cabinet. The fan also delivers a portion of the dehumidified air to the outer casing, where a heater heats it to evaporate some of the moisture in the impeller. The evaporated moisture is then discharged into the outside air through the impeller. A synchronous motor drives the impeller to rotate, maintaining the moisture content within the impeller within the required range. This allows for continuous dehumidification for extended periods, meeting various needs.

[0018] This invention utilizes the principle of rotary dehumidification to expel moisture from inside the cabinet to the outside, making it less affected by ambient temperature and suitable for outdoor electrical cabinets.

[0019] This invention reduces redundant equipment inside the cabinet by using a cabinet door embedded installation method. Its size is smaller than that of an industrial air conditioner, making it easy to install on a smaller electrical cabinet. Its intelligent controller's automatic control logic and setpoint parameters enable it to adapt to dehumidification needs in different environments and can work in conjunction with other environmental management equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a rear view of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the dehumidifying impeller structure of the present invention;

[0025] Figure 5 This is a partial structural diagram of the frame and cover plate of the present invention;

[0026] Figure 6 This is a partial structural diagram of the middle frame and rear frame of the present invention;

[0027] Figure 7 This is a schematic diagram of the heater structure of the present invention;

[0028] Figure 8 This is a schematic diagram of a partial structure of the toothed ring of the present invention;

[0029] Figure 9 This is a block diagram of the dehumidification and air conditioning linkage function control strategy of the present invention;

[0030] Figure 10 This is a block diagram of the heating function control strategy of the present invention;

[0031] Figure 11 This is a block diagram of the ventilation function control strategy of the present invention.

[0032] In the diagram: 1. Housing; 2. Mounting plate; 3. Cover plate; 4. Wiring port; 5. Dry air outlet; 6. Humid air inlet; 601. Filter screen; 602. Filter layer; 7. Humid air outlet; 8. Middle frame; 9. Rear frame; 10. Ventilation port; 11. Controller; 12. Exhaust fan; 13. Fan; 1301. Air inlet; 1302. Return air duct; 1303. Air outlet; 14. Synchronous motor; 1401. Rotating frame; 1402. Gear ring; 1403. Gear; 15. Housing; 16. Dehumidifying wheel; 17. Air duct; 18. Air outlet duct; 19. Heater; 20. Placement slot. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] As attached Figure 1 , 3 4, 5 to Appendix Figure 7 As shown:

[0037] Example 1: This example provides a rotary dehumidifier for outdoor electrical cabinets, including a housing 1, a dehumidification mechanism, a regeneration mechanism, and a controller 11. The dehumidification mechanism includes a middle frame 8 disposed within the housing 1, a placement groove 20 disposed on the middle frame 8, a dehumidification rotary wheel 16 movably disposed within the placement groove 20, a vent 10 disposed on the middle frame 8 at the bottom of the placement groove 20, a cover plate 3 installed at the front end of the housing 1, an exhaust fan 12 disposed between the cover plate 3 at the front end of the dehumidification rotary wheel 16 and the middle frame 8, and a dry air outlet 5 disposed on the cover plate 3 at the front end of the exhaust fan 12. The regeneration mechanism includes a synchronous motor 14 disposed at the input end of the dehumidification rotary wheel 16, a housing 15 disposed on the middle frame 8 on one side of the periphery of the dehumidification rotary wheel 16, a heater 19 disposed within the housing 15 at the front end of the dehumidification rotary wheel 16, a fan 13 fixedly installed at the air inlet of the housing 15 through an air duct 17, and an air outlet duct 18 fixedly installed at the rear end of the housing 15.

[0038] When in use, the device is embedded in the door or outer shell of an outdoor electrical cabinet, with its cover plate 3 inside the cabinet and the shell 1 outside the cabinet, and power is drawn from the AC220V terminal inside the cabinet.

[0039] After the device is powered on, the controller 11 starts working first, monitoring the temperature and humidity inside the cabinet and the temperature and humidity of the external environment in real time, executing program function logic, and automatically controlling the start and stop of related functions.

[0040] When the dehumidification function of the device is activated, the exhaust fan 12, the blower 13, the synchronous motor 14, and the heater 19 are started. The exhaust fan 12 blows the air between the cover plate 3 and the middle frame 8 into the cabinet, forming a negative pressure. The negative pressure then draws the humid air in the cabinet into the device. The humid air enters the device at the rear end of the middle frame 8 through the vent 10, and then is drawn into the space between the cover plate 3 and the middle frame 8 by the exhaust fan 12 through the dehumidification wheel 16. The dehumidification wheel 16 is made of a porous material, which absorbs the moisture in the air as it passes through, making it dry. The air passing through the dehumidification wheel 16 becomes dry, and then the dry air is discharged into the cabinet by the exhaust fan 12. This cycle repeats to complete the dehumidification of the air inside the cabinet.

[0041] When the dehumidifying impeller 16 operates for an extended period, its porous structure becomes clogged with moisture, affecting subsequent dehumidification efficiency. During this process, the synchronous motor 14 continuously drives the impeller 16 to rotate. The fan 13 draws in a portion of the dehumidified air from the impeller 16 and delivers it through the duct 17 to the outer casing 15. The outer casing 15 is fitted onto one side of the impeller 16, partially obscuring it. This results in the impeller 16 being functionally divided into two parts: the portion covered by the outer casing 15 is the regeneration zone, and the remaining portion is the normal dehumidification zone. The device 19 heats the dry air delivered to the housing 15 by the fan 13, and then evaporates the moisture in the dehumidifying wheel 16 in the regeneration zone through the hot air. The evaporated moisture is then carried away by the dehumidifying wheel 16 and discharged into the outside air through the air outlet 18. Since the synchronous motor 14 always drives the dehumidifying wheel 16 to rotate, the dehumidifying wheel 16 part after dehumidification and regeneration is moved out of the regeneration zone and returned to the normal dehumidification zone for normal dehumidification. The subsequent dehumidifying wheel 16 part to be regenerated is moved into the regeneration zone to continue the drying and regeneration work. The operation stops as soon as the humidity inside the cabinet reaches the required level, thus meeting the requirements.

[0042] As attached Figure 1 , 3 4, 5 and appendix Figure 7 As shown:

[0043] Example 2: This example provides a rotary dehumidifier for outdoor electrical cabinets, including a housing 1, a dehumidification mechanism, a regeneration mechanism, and a controller 11. The dehumidification mechanism includes a middle frame 8 disposed within the housing 1, a placement groove 20 disposed on the middle frame 8, a dehumidification rotary wheel 16 movably disposed within the placement groove 20, a vent 10 disposed on the middle frame 8 at the bottom of the placement groove 20, a cover plate 3 installed at the front end of the housing 1, an exhaust fan 12 disposed between the cover plate 3 at the front end of the dehumidification rotary wheel 16 and the middle frame 8, and a dry air outlet 5 disposed on the cover plate 3 at the front end of the exhaust fan 12. The regeneration mechanism includes a synchronous motor 14 disposed at the input end of the dehumidification rotary wheel 16, a housing 15 disposed on the middle frame 8 on one side of the periphery of the dehumidification rotary wheel 16, a heater 19 disposed within the housing 15 at the front end of the dehumidification rotary wheel 16, a fan 13 fixedly installed at the air inlet of the housing 15 through an air duct 17, and an air outlet duct 18 fixedly installed at the rear end of the housing 15.

[0044] As attached Figure 1 and attached Figure 5 As shown:

[0045] Specifically, a humid air inlet 6 is provided on the cover plate 3 at the front end of the vent 10, a filter layer 602 is movably installed inside the humid air inlet 6, and a filter screen 601 is movably installed inside the humid air inlet 6 at the front end of the filter layer 602.

[0046] As attached Figure 2 , 5 and attached Figure 6 As shown:

[0047] Specifically, a humid air outlet 7 is fixedly installed at the rear end of the housing 1, and the humid air outlet 7 is connected to the air outlet pipe 18.

[0048] As attached Figure 1 and attached Figure 3 As shown:

[0049] Specifically, the controller 11 is mounted on the middle frame 8 at the top of the exhaust fan 12, and the cover plate 3 around the controller 11 is provided with a wiring port 4.

[0050] As can be seen from the above, when the exhaust fan 12 is working, the humid air inside the cabinet will enter the device through the humid air inlet 6, and then enter the rear end of the middle frame 8 through the ventilation port 10 for dehumidification. During the process of the humid air passing through the humid air inlet 6, the filter screen 601 will filter out large particulate impurities in the air, and the filter layer 602 will filter out small particulate impurities in the air, so as to prevent the air from directly entering the device and affecting the structural life of the device. In addition, the filter screen 601 and the filter layer 602 adopt a detachable structure, which makes it convenient for personnel to remove, replace and maintain them.

[0051] After being processed by the regeneration mechanism, the humid air will move through the air outlet 18 to the humid air outlet 7, and then be discharged into the outside air through the humid air outlet 7. During the process, the humid air will change its discharge direction and be discharged downwards to avoid backflow or the entry of external air impurities after discharge.

[0052] The controller 11 is connected to the AC220V terminal inside the cabinet via the wiring port 4, and is electrically connected to the exhaust fan 12, the blower 13, and the synchronous motor 14. It draws power from the AC220V terminal inside the cabinet to power the device, and collects the temperature and humidity inside the cabinet and the ambient temperature and humidity outside the cabinet. According to the preset execution logic, it automatically controls the start and stop of the device function based on the preset value parameters.

[0053] As attached Figure 1 , 3 4, 5 and appendix Figure 7 As shown:

[0054] Example 3: This example provides a rotary dehumidifier for outdoor electrical cabinets, including a housing 1, a dehumidification mechanism, a regeneration mechanism, and a controller 11. The dehumidification mechanism includes a middle frame 8 disposed within the housing 1, a placement groove 20 disposed on the middle frame 8, a dehumidification rotary wheel 16 movably disposed within the placement groove 20, a vent 10 disposed on the middle frame 8 at the bottom of the placement groove 20, a cover plate 3 installed at the front end of the housing 1, an exhaust fan 12 disposed between the cover plate 3 at the front end of the dehumidification rotary wheel 16 and the middle frame 8, and a dry air outlet 5 disposed on the cover plate 3 at the front end of the exhaust fan 12. The regeneration mechanism includes a synchronous motor 14 disposed at the input end of the dehumidification rotary wheel 16, a housing 15 disposed on the middle frame 8 on one side of the periphery of the dehumidification rotary wheel 16, a heater 19 disposed within the housing 15 at the front end of the dehumidification rotary wheel 16, a fan 13 fixedly installed at the air inlet of the housing 15 through an air duct 17, and an air outlet duct 18 fixedly installed at the rear end of the housing 15.

[0055] As attached Figure 1 and attached Figure 5 As shown:

[0056] Specifically, a humid air inlet 6 is provided on the cover plate 3 at the front end of the vent 10, a filter layer 602 is movably installed inside the humid air inlet 6, and a filter screen 601 is movably installed inside the humid air inlet 6 at the front end of the filter layer 602.

[0057] As attached Figure 1 , 2 3 and appendix Figure 4 As shown:

[0058] Specifically, a mounting plate 2 is fixedly installed on the outer periphery of the housing 1.

[0059] As attached Figure 4 , 5 and attached Figure 6 As shown:

[0060] Specifically, an air outlet 1303 is provided on the middle frame 8 surrounding the fan 13, an air inlet 1301 is provided on the middle frame 8 at the top of the ventilation opening 10, and a return air duct 1302 is provided between the air inlet 1301 and the air outlet 1303 at the rear end of the middle frame 8.

[0061] As attached Figure 4 and attached Figure 8 As shown:

[0062] Specifically, a rotating frame 1401 is provided at the rear end of the dehumidifying rotor 16, and a gear ring 1402 is fixedly installed on the rotating frame 1401 around the dehumidifying rotor 16. A gear 1403 is provided at the output end of the synchronous motor 14, and the gear 1403 meshes with the gear ring 1402.

[0063] As attached Figure 2 , 5 and attached Figure 6 As shown:

[0064] Specifically, a humid air outlet 7 is fixedly installed at the rear end of the housing 1, and the humid air outlet 7 is connected to the air outlet pipe 18.

[0065] As attached Figure 1 and attached Figure 3 As shown:

[0066] Specifically, the controller 11 is mounted on the middle frame 8 at the top of the exhaust fan 12, and the cover plate 3 around the controller 11 is provided with a wiring port 4.

[0067] As attached Figure 5 and attached Figure 6 As shown:

[0068] Specifically, a rear frame 9 is provided inside the shell 1 at the rear end of the middle frame 8.

[0069] As can be seen from the above, when installing and using the device, firstly, a mounting groove is pre-set on the cabinet door, and then the housing 1 is inserted into the mounting groove from the inside of the cabinet to the outside. After the mounting plate 2 is attached to the cabinet door, it is connected and fixed to complete the installation of the device. The cabinet door embedded installation reduces the redundancy of the equipment inside the cabinet, is suitable for the structural characteristics of electrical cabinets, and can be used for smaller outdoor electrical cabinets.

[0070] Moist air drawn in by the negative pressure of the exhaust fan 12 enters the rear frame 9 through the vent 10. A space is formed between the rear frame 9 and the middle frame 8 for the humid air to flow and contact the dehumidifying impeller 16 for dehumidification. When the fan 13 draws in treated dry air, the dry air enters the rear frame 9 through the air inlet 1301, then moves to the air outlet 1303 through the return air duct 1302, and finally is drawn into the dehumidifying impeller 16 through the air outlet 1303 for drying and regeneration. The return air duct 1302 is located in the rear frame 9. When the synchronous motor 14 is working, it drives the gear 1403 to rotate. The gear 1403 will drive the dehumidification wheel 16 to rotate by meshing with the gear ring 1402. The meshing and speed reduction transmission of the gear 1403 and the gear ring 1402 improves the rotation accuracy of the dehumidification wheel 16 and makes the synchronous motor 14 located on one side of the dehumidification wheel 16. Through the above measures, the overall thickness and area occupied by the device are greatly reduced. The size is small and it is easy to install on a smaller electrical cabinet, increasing the applicability of the device.

[0071] This application designs four control strategies for outdoor electrical cabinets: dehumidification, air conditioning linkage, heating, and ventilation.

[0072] The dehumidification and air conditioning linkage control strategy is as follows: Figure 9 As shown: "Start Dehumidification Setpoint" and "Stop Dehumidification Setpoint" are preset parameters, and the controller 11 can modify these parameters;

[0073] Air conditioning linkage is an auxiliary function of dehumidification. When used in an electrical cabinet equipped with an industrial air conditioner, the air conditioning linkage function is activated so that the rotary dehumidifier can work in conjunction with the industrial air conditioner.

[0074] Logical description: When the humidity inside the cabinet is higher than the dehumidification start setting, dehumidification is started. If the air conditioning linkage function is activated, the air conditioning is turned off. When the humidity inside the cabinet drops below the dehumidification stop setting, dehumidification is stopped, and the air conditioning is restarted (if the air conditioning is turned off).

[0075] The heating function control strategy is as follows: Figure 10 As shown: "Start heating setpoint" and "Stop heating setpoint" are preset parameters, and the controller 11 can modify these parameters;

[0076] The prerequisite for heating to start is that the heating function is activated and the air conditioning linkage function is deactivated.

[0077] Logical description: There are two triggering conditions for heating to start, and the heating function can be started if either one is met: First, the internal and external temperature difference is lower than the start heating set value, and the internal temperature is lower than 40℃; Second, the internal temperature is not higher than 0℃. During heating, there are two triggering conditions for stopping heating: First, the internal and external temperature difference is higher than the stop heating set value, and the internal temperature is not lower than 0℃; Second, the internal temperature is higher than 42℃.

[0078] Ventilation function control strategy is attached. Figure 11 As shown: The prerequisite for heating to start is that the ventilation function is activated and the air conditioning linkage function is deactivated.

[0079] Logical description: The ventilation start-up trigger condition is: the internal temperature exceeds 42℃, the external temperature is below 37℃, and the external humidity value is below the dehumidification start-up set value; the ventilation stop-up condition is: the internal temperature is below 40℃, or the external temperature is above 39℃, or the external humidity is above the dehumidification start-up set value.

[0080] The above "putting on" means that a certain function is put into use and will start when the start conditions are met. "Exiting" means that the function is not used and will not work even when the start conditions are met. By manually putting on or taking off a function through the controller 11, the temperature and humidity environment inside the outdoor electrical cabinet can be optimized.

[0081] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0082] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0083] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A rotary dehumidifier for use in outdoor electrical cabinets, characterized in that: It includes a housing (1), a dehumidification mechanism, a regeneration mechanism, and a controller (11); The dehumidification mechanism includes a middle frame (8) disposed within the housing (1), a placement groove (20) disposed on the middle frame (8), a dehumidification wheel (16) movably disposed within the placement groove (20), a vent (10) disposed on the middle frame (8) at the bottom of the placement groove (20), a cover plate (3) installed at the front end of the housing (1), an exhaust fan (12) disposed between the cover plate (3) at the front end of the dehumidification wheel (16) and the middle frame (8), and a dry air outlet (5) disposed on the cover plate (3) at the front end of the exhaust fan (12). The regeneration mechanism includes a synchronous motor (14) located at the input end of the dehumidifying impeller (16). A housing (15) is installed on the middle frame (8) on one side of the periphery of the dehumidifying impeller (16). A heater (19) is installed inside the housing (15) at the front end of the dehumidifying impeller (16). A fan (13) is fixedly installed at the air inlet of the housing (15) through the air duct (17). An air outlet pipe (18) is fixedly installed at the rear end of the housing (15). An mounting plate (2) is fixedly installed on the periphery of the housing (1); An air outlet (1303) is provided on the middle frame (8) around the fan (13), an air inlet (1301) is provided on the middle frame (8) at the top of the ventilation opening (10), and a return air pipe (1302) is provided between the air inlet (1301) and the air outlet (1303) at the rear end of the middle frame (8). A humid air outlet (7) is fixedly installed at the rear end of the housing (1), and the humid air outlet (7) is connected to the air outlet pipe (18); A rear frame (9) is provided inside the shell (1) at the rear end of the middle frame (8); Control strategies include: Dehumidification starts when the humidity level inside the cabinet is higher than the start dehumidification setpoint, and stops when it is lower than the stop dehumidification setpoint. There are two trigger conditions for heating to start; the heating function can be started if either one is met: First, the temperature difference between the inside and outside is lower than the heating start-up value, and the internal temperature is lower than 40℃; Second, the internal temperature is not higher than 0℃. During heating operation, there are two triggering conditions for stopping heating: First, the temperature difference between the inside and outside is higher than the heating stop set value, and the internal temperature is not lower than 0℃; Second, the internal temperature is higher than 42℃. The conditions for starting ventilation are: the internal temperature exceeds 42℃, the external temperature is below 37℃, and the external humidity is below the dehumidification start-up setpoint. Ventilation will stop when: the internal temperature is below 40°C, or the external temperature is above 39°C, or the external humidity is above the dehumidification setpoint. When dehumidification is started, if the air conditioning linkage function is engaged, the air conditioning will be turned off and will be restored when dehumidification stops; when heating or ventilation is started, this function must be engaged and the air conditioning linkage function must be disengaged.

2. A rotary dehumidifier for outdoor electrical cabinets according to claim 1, characterized in that: A humid air inlet (6) is provided on the cover plate (3) at the front end of the vent (10). A filter layer (602) is movably disposed inside the humid air inlet (6). A filter screen (601) is movably disposed inside the humid air inlet (6) at the front end of the filter layer (602).

3. A rotary dehumidifier for outdoor electrical cabinets according to claim 1, characterized in that: The rear end of the dehumidifying wheel (16) is provided with a rotating frame (1401), and a gear ring (1402) is fixedly installed on the rotating frame (1401) around the dehumidifying wheel (16). The output end of the synchronous motor (14) is provided with a gear (1403), and the gear (1403) meshes with the gear ring (1402).

4. A rotary dehumidifier for outdoor electrical cabinets according to claim 1, characterized in that: The controller (11) is mounted on the middle frame (8) at the top of the exhaust fan (12), and a wiring port (4) is provided on the cover plate (3) around the controller (11).

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