Regenerated airflow generating device and rotary dehumidifier

Abstract

The utility model provides a regenerated air flow generating device and a rotary dehumidifier. The regenerated air flow generating device comprises a circulating air flow pipe and a circulating air flow pipe, the heater comprises a heating box connected to one end of the circulating airflow pipe and a heating piece arranged on the heating box, and a regenerated airflow outlet is formed in the rear side of the heating box; the regeneration fan comprises a volute, a wind wheel and a direct-current brushless motor for driving the wind wheel to rotate, the volute is provided with a first end and a second end which are opposite to each other, the first end of the volute is connected and communicated with the other end of the circulating airflow pipe, the direct-current brushless motor and the wind wheel are both arranged in the volute and located at the second end, and a regeneration airflow inlet is formed in the rear side of the second end. According to the regeneration air flow generating device, the direct-current brushless motor is arranged in the volute of the regeneration fan, the wind wheel is driven to rotate through the direct-current brushless motor, the whole regeneration fan is small in occupied space, and the assembling procedure can be simplified; stepless speed regulation can be realized by adopting the direct-current brushless motor, the regulation operation of air flow is facilitated, and the operation is more stable.

Description

Technical Field

[0001] This application belongs to the field of dehumidification equipment technology, and more specifically, relates to a regenerative airflow generating device and a rotary dehumidifier. Background Technology

[0002] Rotary dehumidifiers are an important branch of dehumidification technology, primarily used in industrial projects with specific air quality requirements. A rotary dehumidifier's rotor has a dehumidification zone and a regeneration zone. When the circulating fan in the regeneration airflow generator operates, it drives airflow towards the heating device, which heats the regeneration zone, drying the moisture. After the rotor rotates, the heating device heats a new regeneration zone, and the cycle repeats. Most existing circulating fans are assembled from a shaded-pole motor, fan blades, and a volute. Their assembly is relatively difficult and inefficient. Furthermore, part of the shaded-pole motor is fixed to the outer surface of the circulating air duct, resulting in a large overall space occupied by the regeneration airflow generator. Utility Model Content

[0003] The purpose of this application is to provide a regenerative airflow generating device and a rotary dehumidifier that are easy to assemble and occupy little space.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a regenerative airflow generating device, comprising:

[0005] Circulating airflow pipe;

[0006] The heater includes a heating box connected to one end of the circulating airflow pipe and a heating element disposed in the heating box, wherein a regeneration airflow outlet is provided on the rear side of the heating box;

[0007] A regenerative fan includes a volute, a rotor, and a brushless DC motor that drives the rotor to rotate. The volute has a first end and a second end opposite to each other. The first end of the volute is connected to and communicates with the other end of the circulating airflow pipe. The brushless DC motor and the rotor are both located inside the volute and at the second end. A regenerative airflow inlet is provided on the rear side of the second end.

[0008] In one embodiment, the first end of the volute is inserted into and sleeved within the circulating airflow pipe and is sealed to the circulating airflow pipe.

[0009] In one embodiment, a sealing strip is provided between the first end of the volute and the circulating airflow pipe to form a sealing fit.

[0010] In one embodiment, the first end of the volute and the circulating airflow pipe are interference-fitted and coated with sealant to form a sealed fit.

[0011] In one embodiment, the brushless DC motor includes an outer rotor and an inner stator. The outer rotor and the impeller are integrally formed, and the inner stator is connected and fixed to the volute. The impeller is positioned directly opposite the regenerative airflow inlet.

[0012] In one embodiment, the wind turbine is provided with a bracket, and a fixed cylinder is provided on the bracket, and the outer rotor is fixed in the fixed cylinder; the DC brushless motor also includes a rotating shaft and a fixed base connected and fixed to the volute, one end of the rotating shaft is fixed to the center position of the bottom of the fixed cylinder, and the other end of the rotating shaft passes through the inner stator, and the inner stator is fixed on the fixed base.

[0013] In one embodiment, the inner stator includes an iron core and a winding wound on the iron core, with a first through hole in the middle of the iron core; a positioning post is provided on the fixed base, the iron core is sleeved on the positioning post through the first through hole, a bearing is fixed inside the positioning post, and the other end of the rotating shaft extends into the positioning post and is fixed to the inner ring of the bearing.

[0014] In one embodiment, the brushless DC motor further includes an electronic control board fixed to the positioning post, the electronic control board having a second through hole through which the positioning post passes.

[0015] In one embodiment, the bottom wall of the circulating airflow pipe near the heating box is provided with a flow-guiding slope.

[0016] A rotary dehumidifier includes the aforementioned regenerative airflow generating device.

[0017] The beneficial effects of the regenerative airflow generating device provided in this application are as follows: Compared with the prior art, the regenerative airflow generating device of this application has a DC brushless motor installed in the volute of the regenerative fan, which drives the impeller to rotate and thus drives the airflow. The regenerative fan occupies less space and simplifies the assembly process. Compared with the shaded pole motor, the DC brushless motor can achieve stepless speed regulation, which facilitates the adjustment of airflow and makes the operation more stable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A perspective view of the regenerative airflow generating device provided in the embodiments of this application;

[0020] Figure 2 for Figure 1 A three-dimensional view of the regenerative airflow generator from another angle;

[0021] Figure 3 for Figure 1 A partial cross-sectional view of the regenerative fan in the regenerative airflow generator shown;

[0022] Figure 4 for Figure 1 A partial exploded view of the regenerative airflow generator shown.

[0023] The following are the labeling elements in the figure:

[0024] 10-Circulating airflow pipe; 20-Heater; 30-Regenerative fan; 11-First housing; 110-Slope; 12-Second housing; 21-Heating box; 22-Heating element; 201-Regenerative airflow outlet; 31-Vortex; 311-First end; 312-Second end; 313-Regenerative airflow inlet; 32-Iron wheel; 320-Fan blade; 321-Fixing ring; 33-DC brushless motor; 330-Outer rotor; 331-Inner stator; 332-Shaft; 333-Iron core; 334-Winding; 335-Electrical control board; 34-Bracket; 340-Fixing cylinder; 341-Connecting part; 342-Mounting base; 35-Fixing base; 350-Positioning column; 351-Bearing. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] Please refer to the following: Figures 1 to 3 The regenerative airflow generating device provided in this application embodiment will now be described. The regenerative airflow generating device includes a circulating airflow pipe 10, a heater 20, and a regenerative fan 30. The circulating airflow pipe 10 can be a flat pipe. The heater 20 includes a heating box 21 and a heating element 22. The heating box 21 is connected to one end of the circulating airflow pipe 10, and the heating element 22 is disposed inside the heating box 21. A regenerative airflow outlet 201 is provided on the rear side of the heating box 21.

[0030] The regenerative fan 30 includes a volute 31, an impeller 32, and a brushless DC motor 33 that drives the impeller 32 to rotate. The volute 31 has a first end 311 and a second end 312. The first end 311 of the volute 31 is connected to and communicates with the other end of the circulating airflow pipe 10. The volute 31 and the circulating airflow pipe 10 can be installed by plugging in. The brushless DC motor 33 and the impeller 32 are both located inside the volute 31 and at the second end 312 of the volute 31. This design eliminates the need for additional space for the regenerative fan 30, significantly reducing space requirements compared to the traditional shaded-pole motor and impeller installation structure. Furthermore, the brushless DC motor 33 offers advantages such as stable operation, high efficiency, and stepless speed regulation. A regenerative airflow inlet 313 is provided on the rear side of the second end 312 of the volute 31. The size of the regenerative airflow inlet 313 is approximately equal to the inner diameter of the impeller 32. When the DC brushless motor 33 drives the impeller 32 to rotate, the airflow flows in from the regeneration airflow inlet 313. The impeller 32 drives the airflow through the volute 31 to the circulating airflow pipe 10, and then discharges it from the regeneration airflow outlet 201 at the rear of the heating box 21. In this way, the high-temperature air passes through the regeneration zone of the impeller, thereby taking away the moisture in the regeneration zone. The evaporated water vapor is cooled down and condensed into water droplets after being condensed by the heat exchanger at the rear. The dry airflow then flows in from the regeneration airflow inlet 313, thus achieving airflow circulation.

[0031] Compared with the prior art, the regenerative airflow generating device provided in this application has a DC brushless motor 33 installed in the volute 31 of the regenerative fan 30. The DC brushless motor 33 drives the impeller 32 to rotate, thereby driving the airflow. The regenerative fan 30 occupies less space and simplifies the assembly process. Compared with the shaded pole motor, the DC brushless motor 33 can achieve stepless speed regulation, which facilitates the adjustment of airflow and makes the operation more stable.

[0032] See Figure 1 , Figure 2 The first end 311 of the volute 31 is inserted into the circulating airflow pipe 10 and is sealed to the circulating airflow pipe 10. The volute 31 and the circulating airflow pipe 10 can be sealed together by means of sealing strips or sealant.

[0033] In one embodiment, a sealing strip is provided between the first end 311 of the volute 31 and the circulating airflow pipe 10 to form a sealed fit. The sealing strip can be fitted onto the first end 311 of the volute 31 before the volute 31 is inserted into the circulating airflow pipe 10. In another embodiment, the first end 311 of the volute 31 and the circulating airflow pipe 10 are press-fitted together, and sealant is applied between them to form a sealed fit. That is, the sealant is applied to the assembly point after the first end 311 of the volute 31 is inserted into the circulating airflow pipe 10, so that a more stable sealed assembly can be formed after the two are assembled.

[0034] See Figure 2 and Figure 3 The brushless DC motor 33 includes an outer rotor 330 and an inner stator 331. The inner stator 331 includes an iron core 333 and windings 334 wound on the iron core 333. The inner stator 331 is connected and fixed to the volute 31, and is located within the inner space enclosed by the outer rotor 330. The outer rotor 330 and the impeller 32 are integrated, which eliminates the complex assembly operation between the impeller 32 and the brushless DC motor 33, improving production efficiency. The impeller 32 is positioned directly opposite the regenerative airflow inlet 313, and the rotation axis of the impeller 32 coincides with the center of the regenerative airflow inlet 313.

[0035] The impeller 32 includes multiple circumferentially arranged blades 320 and two fixing rings 321 connected to each blade 320. One fixing ring 321 is located at one end of a blade 320, and the other fixing ring 321 is located at the other end of a blade 320. A bracket 34 is provided inside the impeller 32, and a fixing cylinder 340 is mounted on the bracket 34, in which the outer rotor 330 is fixed. The brushless DC motor 33 also includes a rotating shaft 332 and a fixing seat 35 connected and fixed to the volute 31. One end of the rotating shaft 332 is fixed to the center of the bottom of the fixing cylinder 340, i.e., the central axis of the rotating shaft 332 coincides with the central axis of the fixing cylinder 340. The other end of the rotating shaft 332 passes through an inner stator 331, which is fixed to the fixing seat 35.

[0036] The fixed base 35 can be specifically connected and fixed to the volute 31 with screws. The inner stator 331 has a first through hole in the center of its iron core 333. The fixed base 35 has a positioning post 350, the size of which is adapted to the first through hole. The iron core 333 is fitted onto the positioning post 350 through the first through hole, i.e., the positioning post 350 and the wall of the first through hole are interference-fitted, thus fixing the inner stator 331 relative to the fixed base 35. A positioning structure can also be provided between the positioning post 350 and the iron core 333, such as a positioning strip and a positioning groove that cooperate between them, forming a positioning structure. A bearing 351 is fixed inside the positioning post 350, and the other end of the rotating shaft 332 extends into the positioning post 350 and is fixed to the inner ring of the bearing 351. The bearing 351 can be an oil-impregnated bearing 351. The outer ring of the bearing 351 and the locating pin 350 are interference-fitted. The end faces of the bearing 351, the locating pin 350 and the iron core 333 on the same side can be set to be flush.

[0037] Specifically, the support 34 and the impeller 32 are integrally formed. The fixing cylinder 340 on the support 34 is a cylinder with one end open and the other end closed. The size of the cavity of the fixing cylinder 340 is adapted to the size of the outer rotor 330, and the outer rotor 330 is fixed in the fixing cylinder 340. The outer rotor 330 can be a magnetic ring, with the outer peripheral wall of the magnetic ring and the fixing cylinder 340 having an interference fit, thus forming an integral structure; the outer rotor 330 can also be a structure with multiple magnets arranged in a ring, each magnet being fixed on the inner peripheral wall of the fixing cylinder 340. The fixing cylinder 340 extends radially outward at the end near the opening to form a connecting part 341. The connecting part 341 has a hollow structure, and the fixing cylinder 340 is connected to each blade 320 of the impeller 32 through the connecting part 341. At the center of the bottom of the cavity of the fixing cylinder 340, there is a mounting seat 342 for inserting and fixing one end of the rotating shaft 332. In this way, the rotating shaft 332, the outer rotor 330 and the impeller 32 are integrated into one unit, simplifying the assembly process.

[0038] See Figure 2 , Figure 3 The DC brushless motor 33 also includes an electronic control board 335 fixed on the positioning post 350, which is electrically connected to the winding 334 of the inner stator 331. The electronic control board 335 has a second through hole through which the positioning post 350 passes, the diameter of which is adapted to the outer diameter of the positioning post 350. A cable outlet hole may be provided on the volute 31 for cables connected to the electronic control board 335 to be led out from the volute 31. The electronic control board 335 is equipped with a speed monitoring mechanism (not shown) for monitoring the speed of the outer rotor 330, thus enabling real-time monitoring of the motor speed and whether the motor rotation is abnormal.

[0039] See Figure 1 , Figure 4The heating box 21 has an opening on its side wall near the circulating airflow pipe 10, which connects the heating box 21 to the circulating airflow pipe 10. The circulating airflow pipe 10 has a guide ramp 110 at its bottom near the heating box 21. The higher end of the ramp 110 connects to the side wall of the heating box 21 with the opening. This ramp 110 reduces the amount of backflow air, allowing more airflow to flow smoothly into the heating box 21.

[0040] The heating box 21 has a rectangular cross-section, and one end of the ramp 110 is connected to the two adjacent side walls of the heating box 21. That is, most of the higher part of the ramp 110 is connected to one side wall of the heating box 21, and the remaining part is connected to the other adjacent side wall of the heating box 21. This increases the air intake area and thus increases the air volume.

[0041] See Figure 1 and Figure 4 The heating box 21 and the circulating airflow pipe 10 are integrated, which saves manufacturing steps. The one-piece molding method also eliminates the need for docking and installation, and also eliminates the need for a sealing structure at the docking point. Specifically, the circulating airflow pipe 10 and the heating box 21 can be formed by two connected first housings 11 and second housings 12. A mutually cooperating positioning structure can be provided between the first housing 11 and the second housing 12 to facilitate positioning and assembly.

[0042] The rotary dehumidifier provided in this application includes the regenerative airflow generating device described in the above embodiments. The rotary dehumidifier also includes a rotary wheel, a processing airflow generating device, and a heat exchanger. The regenerative airflow generating device and the processing airflow generating device are located on the same side of the rotary wheel, and the heat exchanger is located on the other side of the rotary wheel. The processing airflow generating device provides a first airflow through the rotary wheel. That is, after the processing airflow generating device is activated, the external airflow flows to the rotary wheel through the gaps between the heat exchange tubes of the heat exchanger. The airflow dehumidified by the rotary wheel is then drawn out of the rotary dehumidifier by the processing airflow generating device. The regenerative airflow generating device provides a second airflow. The second airflow is heated by the heating element in the heating box before passing through the rotary wheel, and then enters the heat exchanger through the regenerative airflow outlet. After being condensed and cooled by the heat exchanger, it flows to the regenerative airflow generating device through the regenerative airflow inlet, thus circulating in a cycle.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A regenerative airflow generating device, characterized in that: include: Circulating airflow pipe; The heater includes a heating box connected to one end of the circulating airflow pipe and a heating element disposed in the heating box, wherein a regeneration airflow outlet is provided on the rear side of the heating box; A regenerative fan includes a volute, a rotor, and a brushless DC motor that drives the rotor to rotate. The volute has a first end and a second end opposite to each other. The first end of the volute is connected to and communicates with the other end of the circulating airflow pipe. The brushless DC motor and the rotor are both located inside the volute and at the second end. A regenerative airflow inlet is provided on the rear side of the second end.

2. The regenerative airflow generating device as described in claim 1, characterized in that: The first end of the volute is inserted into and sleeved inside the circulating airflow pipe and is sealed to the circulating airflow pipe.

3. The regenerative airflow generating device as described in claim 2, characterized in that: A sealing strip is provided between the first end of the volute and the circulating airflow pipe to form a sealed fit.

4. The regenerative airflow generating device as described in claim 2, characterized in that: The first end of the volute is press-fitted with the circulating airflow pipe, and a sealant is applied between them to form a sealed fit.

5. The regenerative airflow generating device as described in claim 1, characterized in that: The brushless DC motor includes an outer rotor and an inner stator. The outer rotor and the impeller are an integral structure. The inner stator is connected and fixed to the volute. The impeller is positioned directly opposite the regenerative airflow inlet.

6. The regenerative airflow generating device as described in claim 5, characterized in that: The wind turbine is equipped with a support frame, and a fixed cylinder is provided on the support frame. The outer rotor is fixed in the fixed cylinder. The DC brushless motor also includes a rotating shaft and a fixed base connected and fixed to the volute. One end of the rotating shaft is fixed to the center of the bottom of the fixed cylinder, and the other end of the rotating shaft passes through the inner stator. The inner stator is fixed on the fixed base.

7. The regenerative airflow generating device as described in claim 6, characterized in that: The inner stator includes an iron core and a winding wound on the iron core. A first through hole is provided in the middle of the iron core. A positioning post is provided on the fixed base. The iron core is sleeved on the positioning post through the first through hole. A bearing is fixed inside the positioning post. The other end of the rotating shaft extends into the positioning post and is fixed to the inner ring of the bearing.

8. The regenerative airflow generating device as described in claim 7, characterized in that: The brushless DC motor also includes an electronic control board fixed on the positioning post, and the electronic control board has a second through hole through which the positioning post passes.

9. The regenerative airflow generating device according to any one of claims 1-8, characterized in that: The bottom wall of the circulating airflow pipe near the heating box is provided with a flow-guiding slope.

10. A rotary dehumidifier, characterized in that: Includes the regenerative airflow generating device according to any one of claims 1-9.

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