Regenerative airflow generating device and rotary dehumidifier

Abstract

The application relates to a regenerative air flow generating device and a rotary dehumidifier. The regenerative air flow generating device comprises a circulating air flow pipe with a first pipe section and a second pipe section in communication, a regenerative air blower arranged at an air inlet end of the first pipe section, a heating element arranged in the second pipe section, and a flow dividing element arranged in the circulating air flow pipe. The regenerative air flow generating device and the rotary dehumidifier designed by the application actively guide part of the air flow generated by the air blower to a proximal end region of the heater close to the air blower by arranging the flow dividing element in the circulating air flow pipe, effectively improve the air flow distribution state in the whole heater region, and solve the problem of low local heat exchange efficiency caused by uneven air flow. Therefore, the device can generate regenerative hot air with more uniform flow and temperature distribution, increase the effective regeneration area of the dehumidification rotor, and finally improve the regeneration efficiency of the rotor and the dehumidification performance of the whole machine.

Description

Technical Field

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

[0002] A rotary dehumidifier is a highly efficient air dehumidification device. Its working principle is based on the cyclic regeneration process of a moisture-absorbing rotor. A rotary dehumidifier typically includes two independent airflow circulation systems: a handling air system and a regeneration air system. The handling air system is responsible for dehumidifying the air to be dehumidified by passing it through the moisture-absorbing rotor; the regeneration air system is responsible for heating and drying the already moisture-absorbing rotor, restoring its moisture-absorbing capacity, thus achieving continuous dehumidification.

[0003] In actual product design, in order to achieve a compact overall structure, the internal space of the regenerative airflow generator is often designed to be relatively flat, and centrifugal fans are usually used because they can provide high air pressure in a limited space. However, the air velocity at the outlet of the centrifugal fan is extremely high and has a strong directionality. When this high-speed airflow enters the subsequent flat heating chamber, due to inertia, most of the airflow will rush directly towards and concentrate at the end of the heating chamber away from the fan along its exit direction. In contrast, the area near the fan becomes a low-velocity area because the airflow is "elevated".

[0004] This severely uneven airflow distribution results in an area near the fan outlet where the excessively low flow velocity prevents the heat generated by the heating elements from being effectively dissipated, leading to localized overheating and wasted energy. Ultimately, the hot air exiting the entire heater outlet exhibits an uneven distribution in both velocity and flow rate. Utility Model Content

[0005] To address the aforementioned issues, this application provides a regenerative airflow generating device and a rotary dehumidifier that optimizes the uniformity of regenerative airflow distribution on the heater, thereby improving the regeneration efficiency of the dehumidifying rotor and the overall dehumidification performance.

[0006] To achieve the above objectives, in a first aspect, embodiments of this application provide a regenerative airflow generating device, comprising:

[0007] The circulating airflow pipe has a first pipe section and a second pipe section that are connected to each other.

[0008] A regenerator fan is installed at the air inlet end of the first pipe section;

[0009] The heating element is installed inside the second pipe section;

[0010] A flow divider is disposed inside the circulating airflow pipe;

[0011] The second pipe section has a near-end region close to the regenerator and a far-end region away from the regenerator. At least a portion of the diverter extends into the second pipe section to change the airflow direction entering the second pipe section, thereby balancing the airflow in the near-end region and the far-end region.

[0012] Preferably, the diverter includes a first baffle, one end of which extends into the second pipe section and is inclined toward the heating element.

[0013] Preferably, the other end of the first partition extends into the first pipe section, and the first partition divides the circulating airflow pipe into a first air duct and a second air duct. The air outlet of the first air duct corresponds to the near-end region, and the air outlet of the second air duct corresponds to the far-end region.

[0014] Preferably, the first partition includes a first segment, a second segment, and an arc-shaped segment connected in sequence. The first segment is housed within the first pipe segment, and the second segment and the arc-shaped segment are housed within the second pipe segment. The arc-shaped segment is bent away from the heating element.

[0015] Preferably, the second pipe section includes a heating box, which includes a bottom shell and a cover connected to each other. The heating element is fixed in the bottom shell, and an airflow outlet is provided on the rear side of the bottom shell. The end of the cover away from the regeneration fan is inclined toward the heating element.

[0016] Preferably, the heating element includes a plurality of PTC heaters arranged side by side; the airflow outlet of the heating box is provided with an inwardly extending mounting eave, the bottom periphery of the plurality of PTC heaters is supported on the mounting eave, and the cover presses the PTC heaters into the bottom shell.

[0017] Preferably, the first pipe section includes a volute, the volute including a main shell, a front cover plate and a rear cover plate respectively connected to the front and rear sides of the main shell, the rear cover plate having an airflow inlet, the regenerative fan including a fan wheel and a DC brushless motor for driving the fan wheel to rotate, the DC brushless motor being fixed to the outer wall of the front cover plate, the output shaft of the DC brushless motor passing through the front cover plate and connected to the fan wheel, the thickness of the volute being less than the thickness of the heating box, and the rear cover plate having a slope at one end near the heating box.

[0018] Preferably, the first partition has a hollow first protrusion structure protruding forward and / or the cover has a hollow second protrusion structure protruding forward. The end of the first protrusion structure extends to the proximal region near the air inlet of the heating box, and the second protrusion structure extends from the proximal region to the distal region. The width of the second protrusion structure gradually decreases along the airflow direction, and the end of the second protrusion structure is positioned towards the side of the volute with the volute tongue. The depth of the cavity enclosed by the second protrusion structure gradually increases along the airflow direction.

[0019] Preferably, the diverter includes a second baffle plate disposed on the inner wall of the second pipe section, the second baffle plate being spaced apart from the heating element, the second baffle plate being arranged in a direction parallel to the width direction of the heating element, and being vertically arranged or inclined relative to the vertical direction.

[0020] Secondly, embodiments of this application provide a rotary dehumidifier, including the regenerative airflow generating device described in any embodiment of the first aspect.

[0021] The regenerative airflow generator and rotary dehumidifier designed in this application, by installing a flow divider in the circulating airflow pipe, actively guide a portion of the airflow generated by the fan to the near-end region of the heater close to the fan, effectively improving the airflow distribution within the entire heater area and solving the problem of low local heat exchange efficiency caused by uneven airflow. As a result, the device can generate regenerative hot air with a more uniform flow rate and temperature distribution, increasing the effective regeneration area of ​​the dehumidification rotor, and ultimately improving the rotor's regeneration efficiency and the overall dehumidification performance of the machine. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the regenerative airflow generating device provided in the embodiments of this application.

[0023] Figure 2 This is a three-dimensional structural schematic diagram of the regenerative airflow generating device provided in the embodiments of this application from another perspective.

[0024] Figure 3 yes Figure 1 3D exploded view.

[0025] Figure 4 yes Figure 1 A three-dimensional exploded view from another perspective.

[0026] Figure 5 yes Figure 1 The front view.

[0027] Figure 6 yes Figure 5 Three-dimensional cross-sectional view at point AA.

[0028] Figure 7 This is a cross-sectional view of a regenerated airflow generating device provided in another embodiment of this application.

[0029] The components include: circulating airflow pipe 10, first pipe section 11, second pipe section 12, near-end area 12a, far-end area 12b, regenerating fan 20, impeller 21, DC brushless motor 22, heating element 30, wiring terminal 31, diverter 40, first partition 41, first section 41a, second section 41b, arc section 41c, first protruding structure 51, second protruding structure 52, second partition 60, volute 110, main shell 111, front cover 112, rear cover 113, airflow inlet 114, ramp 115, volute tongue 116, heating box 120, bottom shell 121, cover 122, airflow outlet 123, mounting eaves 124, wiring hole 125, first air duct F1, and second air duct F2. Detailed Implementation

[0030] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0031] In a first aspect, embodiments of this application provide a regenerative airflow generating device, which can be applied in a rotary dehumidifier, for example, disposed on one side of the rotor (not shown in the figure) of the rotary dehumidifier to generate regenerative hot air. For ease of description, the side of the regenerative airflow generating device and its components closest to the rotor is defined as the rear side, and the side closest to the rotor is defined as the front side.

[0032] like Figure 1 , Figure 3 , Figure 7 As shown, the regenerative airflow generating device mainly includes a circulating airflow pipe 10, a regenerative fan 20, a heating element 30, and flow dividers 40a and 40b disposed within the circulating airflow pipe 10. The circulating airflow pipe 10 has a generally flat structure, with interconnected airflow channels defined inside. Specifically, the circulating airflow pipe 10 has a first pipe section 11 and a second pipe section 12 that are interconnected. The regenerative fan 20 is disposed at the air inlet end of the first pipe section 11, and its air outlet faces the second pipe section 12, providing airflow and blowing it towards the second pipe section 12. The heating element 30 is disposed within the second pipe section 12 and is used to heat the flowing air.

[0033] like Figure 1 , Figure 6 , Figure 7As shown, the second pipe section 12 has a near-end region 12a close to the regeneration fan 20 and a far-end region 12b far from the regeneration fan 20. At least a portion of the diverter components 40a and 40b extend into the second pipe section 12, that is, the diverter components 40a and 40b are arranged between the regeneration fan 20 and the heating element 30 to change the airflow direction entering the second pipe section 12, actively intercept a portion of the high-speed airflow blown out from the regeneration fan 20, and guide and distribute it to the near-end region 12a, which originally has a smaller flow rate, so that the airflow distribution in the entire second pipe section 12 tends to be uniform, thereby balancing the air volume of the near-end region 12a and the far-end region 12b.

[0034] like Figure 2 , Figure 4 As shown, the first pipe section 11 includes a volute 110, and the second pipe section 12 includes a heating box 120. The heating box 120 and the volute 110 are joined to form a complete circulating airflow pipe 10. Specifically, the two can be fixed by flange connection, bolt connection, or snap-fit ​​structure to ensure the airtightness of the connection. In this embodiment, the volute 110 is the main outer shell structure of the regenerative fan 20, while the heating box 120 serves as the heating channel for the airflow. Its internal space is relatively large to accommodate the heating element 30 and provide sufficient space for heating the airflow.

[0035] Furthermore, such as Figure 2 , Figure 3 As shown, the heating box 120 includes a bottom shell 121 and a cover 122 connected together. The heating element 30 is fixed in the bottom shell 121, and an airflow outlet 123 is provided on the rear side of the bottom shell 121. When assembled in a rotary dehumidifier, the bottom shell 121 is located on the side closer to the regeneration zone of the rotor. The airflow generated by the regeneration fan 20 enters the heating box 120, is heated by the heating element 30 to form hot air, and flows out from the airflow outlet 123 and blows towards the rotor to remove moisture from the regeneration zone of the rotor. In addition, in order to optimize airflow in coordination with the diverter 40a, the cover 122 can be tilted towards the heating element 30 at the end away from the regeneration fan 20. The cover 122 forms an inclined surface at this end. When the airflow reaches the inclined surface of the cover 122, it is blocked, causing the airflow to change direction and flow to the far end region 12b. This avoids the airflow flowing directly to the side wall of the heating box 120 near the far end region 12b and then flowing back. In this way, the airflow to the far end region 12b is more uniform and the airflow velocity is more stable.

[0036] In one embodiment, such as Figure 3 , Figure 6 As shown, the flow divider 40a includes a first baffle 41, one end of which extends into the second pipe section 12 and is inclined toward the heating element 30. In a specific implementation, the first baffle 41 can be set only in the second pipe section 12, i.e., the heating box 120, to change the airflow direction entering the second pipe section 12, thereby balancing the air volume of the near-end region 12a and the far-end region 12b.

[0037] like Figure 3 , Figure 6 As shown, the other end of the first baffle 41 extends into the first pipe section 11 and extends close to the regeneration fan 20; the first baffle 41 divides the circulating airflow pipe 10 into a first air duct F1 and a second air duct F2, the air outlet of the first air duct F1 corresponds to the near-end region 12a, and the air outlet of the second air duct F2 corresponds to the far-end region 12b. This achieves forced and precise distribution of airflow.

[0038] Furthermore, such as Figure 3 , Figure 6 As shown, the first partition 41 includes a first segment 41a, a second segment 41b, and an arc-shaped segment 41c connected in sequence. The first segment 41a is housed within the first pipe segment 11, and the second segment 41b and the arc-shaped segment 41c are housed within the second pipe segment 12. The arc-shaped segment 41c bends away from the heating element 30. The arc-shaped segment 41c further optimizes the airflow guidance effect, allowing the airflow to change direction more smoothly when passing through the arc-shaped segment 41c, reducing flow separation and pressure loss. In specific implementation, the first segment 41a of the first partition 41 is integrally formed with the volute 110, the first segment 41a and the second segment 41b are connected to each other, the second segment 41b and the arc-shaped segment 41c can be integrally formed, and the second segment 41b and the arc-shaped segment 41c can also be inserted and fixedly assembled in the heating box 120. This saves manufacturing steps, and the integral forming method also eliminates the need for docking and installation, as well as the need for a sealing structure at the docking point after docking and installation. Understandably, the number of first baffles 41 inside the circulating airflow pipe 10 is not limited to one, and its number can be increased according to the actual thickness of the circulating airflow pipe.

[0039] like Figure 2 , Figure 6 As shown, the heating element 30 includes multiple PTC heaters arranged side by side; the airflow outlet 123 of the heating box 120 is provided with an inwardly extending mounting eave 124, and the bottom periphery of the multiple PTC heaters is supported on the mounting eave 124. The cover 122 presses the PTC heaters into the bottom shell 121. Installation is simple and facilitates rapid assembly. In this embodiment, a PTC heater is used as the heating element, which has good safety performance, uniform heating, and does not produce a surface reddening phenomenon like tungsten wire. There is no need to set a shielding part in the corresponding gap of the casing to block the light emitted by the tungsten wire. The overall structure of the product is simple, and the PTC heater has a long service life, reducing maintenance costs.

[0040] In specific implementation, such as Figure 3 , Figure 4 , Figure 6As shown, adjacent PTC heaters in each PTC heater are fixed together by adhesive bonding. This allows the PTC heaters to be bonded together as a side-by-side heating module before installing the heating element 30 into the heating box 120, eliminating the need to install each PTC heater individually. One end of each PTC heater has a terminal 31, which is connected to the power supply of the rotary dehumidifier via a cable. The side wall of the heating box 120 has a cable routing hole 125 for the cable to extend out.

[0041] like Figure 3 , Figure 4 , Figure 6 As shown, the volute 110 includes a main shell 111, a front cover plate 112 and a rear cover plate 113 respectively connected to the front and rear sides of the main shell 111. The main shell 111, the front cover plate 112 and the rear cover plate 113 together define a first pipe section 11. The first section 41a of the first partition plate 41 is arranged parallel to the front cover plate 112, and the first section 41a can be located in the middle of the main shell 111. The rear cover plate 113 has an airflow inlet 114. The regenerative fan 20 includes a fan wheel 21 and a DC brushless motor 22 that drives the fan wheel 21 to rotate. The DC brushless motor 22 is fixed to the outer wall of the front cover plate 112, and the output shaft of the DC brushless motor 22 passes through the front cover plate 112 and is connected to the fan wheel 21. In this embodiment, as Figure 6 As shown, the thickness of the volute 110 is less than the thickness of the heating box 120, and the rear cover plate 113 has a ramp 115 near the heating box 120. Furthermore, the thickness at the entrance of the heating box 120 connecting to the volute 110 is smaller than that of other areas. Combined with the ramp 115 on the rear cover plate 113 of the volute 110, a smooth transition surface can be formed, effectively guiding airflow and preventing impact, rebound, or unnecessary turbulence when the airflow encounters steps or right-angle structures upon entering the heating box 120 entrance, thus ensuring smooth airflow delivery. In this embodiment, the first section 41a of the first partition plate 41 is integrally formed with the main shell 111.

[0042] like Figures 3 to 5As shown, the cover 122 and / or the first partition 41 of the heating box 120 are provided with a protruding structure. The protruding structure is a hollow structure that protrudes forward, and its smooth surface helps to reduce airflow resistance. Specifically, the first partition 41 is provided with a first protruding structure 51. The width of the first protruding structure 51 can be designed to gradually decrease along the airflow direction, that is, from the first pipe section 11 to the second pipe section 12. The first protruding structure 51 extends from the first section 41a to the second section 41b. The starting end of the first protruding structure 51 is located away from the side of the volute 110 with the volute tongue 116. The end of the first protruding structure 51 extends to the proximal region 12a near the air inlet of the heating box 120. The depth of the cavity enclosed by the first protruding structure 51 gradually increases along the airflow direction, which can increase the airflow rate in the proximal region 12a near the air inlet of the heating box 120. A second protruding structure 52 is provided on the cover 122. Its width can also be designed to gradually decrease along the airflow direction. The end of the second protruding structure 52 is positioned near the side of the volute 110 with the volute tongue 116, and the end of the second protruding structure 52 can extend to the position corresponding to the distal region 12b near the heating box 120 to enhance the airflow in that region. The depth of the chamber enclosed by the second protruding structure 52 gradually increases along the airflow direction.

[0043] In another embodiment, such as Figure 7 As shown, the flow divider 40b includes a second baffle 60 disposed on the inner wall of the second pipe section 12. The second baffle 60 is spaced apart from the heating element 30, and the second baffle 60 is arranged in a direction parallel to the width direction of the heating element 30. In this embodiment, the second baffle 60 can be arranged vertically or inclined relative to the vertical direction. By forming a physical obstruction in the airflow channel, it forces a portion of the airflow that would originally flow to the far end region 12b to change its flow path and turn to the near end region 12a with a smaller flow rate, thereby achieving the purpose of improving the uniformity of airflow distribution.

[0044] Secondly, embodiments of this application provide a rotary dehumidifier, including a regenerative airflow generating device according to any embodiment of the first aspect. Due to the use of the aforementioned regenerative airflow generating device, the rotary dehumidifier has the advantages of high regeneration efficiency and good overall dehumidification performance.

[0045] The regenerative airflow generating device and rotary dehumidifier provided in this application embodiment, by setting a flow divider in the circulating airflow pipe, actively guides part of the airflow generated by the fan to the near-end area of ​​the heater close to the fan, effectively improving the airflow distribution in the entire heater area and solving the problem of low local heat exchange efficiency caused by uneven airflow. Therefore, the device can generate regenerative hot air with more uniform flow and temperature distribution, increasing the effective regeneration area of ​​the dehumidification rotor, and ultimately improving the regeneration efficiency of the rotor and the overall dehumidification performance of the machine.

[0046] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", 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.

[0047] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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: The circulating airflow pipe has a first pipe section and a second pipe section that are connected to each other. A regenerator fan is installed at the air inlet end of the first pipe section; The heating element is installed inside the second pipe section; A flow divider is disposed within the circulating airflow duct; wherein the second duct section has a proximal region close to the regenerator and a distal region away from the regenerator, and at least a portion of the flow divider extends into the second duct section to change the airflow direction entering the second duct section, thereby balancing the airflow in the proximal region and the distal region.

2. The regenerative airflow generating device according to claim 1, characterized in that, The diversion component includes a first partition, one end of which extends into the second pipe section and is inclined toward the heating element.

3. The regenerative airflow generating device according to claim 2, characterized in that, The other end of the first partition extends into the first pipe section. The first partition divides the circulating airflow pipe into a first air duct and a second air duct. The air outlet of the first air duct corresponds to the near-end region, and the air outlet of the second air duct corresponds to the far-end region.

4. The regenerative airflow generating device according to claim 3, characterized in that, The first partition includes a first segment, a second segment, and an arc-shaped segment connected in sequence. The first segment is housed within the first pipe segment, and the second segment and the arc-shaped segment are housed within the second pipe segment. The arc-shaped segment is bent away from the heating element.

5. The regenerative airflow generating device according to any one of claims 2-4, characterized in that, The second pipe section includes a heating box, which includes a bottom shell and a cover connected to each other. The heating element is fixed in the bottom shell, and an airflow outlet is provided on the rear side of the bottom shell. The end of the cover away from the regeneration fan is inclined toward the heating element.

6. The regenerative airflow generating device according to claim 5, characterized in that, The heating element includes multiple PTC heaters arranged side by side; the airflow outlet of the heating box is provided with an inwardly extending mounting eave, the bottom periphery of the multiple PTC heaters is supported on the mounting eave, and the cover presses the PTC heaters into the bottom shell.

7. The regenerative airflow generating device according to claim 5, characterized in that, The first pipe section includes a volute, which includes a main shell, a front cover plate and a rear cover plate connected to the front and rear sides of the main shell respectively. The rear cover plate has an airflow inlet. The regenerative fan includes a fan wheel and a DC brushless motor that drives the fan wheel to rotate. The DC brushless motor is fixed to the outer wall of the front cover plate. The output shaft of the DC brushless motor passes through the front cover plate and is connected to the fan wheel. The thickness of the volute is less than the thickness of the heating box. The rear cover plate has a slope at one end near the heating box.

8. The regenerative airflow generating device according to claim 7, characterized in that, The first partition has a hollow first protrusion structure protruding forward and / or the cover has a hollow second protrusion structure protruding forward. The end of the first protrusion structure extends to the proximal region near the air inlet of the heating box. The second protrusion structure extends from the proximal region to the distal region. The width of the second protrusion structure gradually decreases along the airflow direction. The end of the second protrusion structure is positioned towards the side of the volute with the volute tongue. The depth of the cavity enclosed by the second protrusion structure gradually increases along the airflow direction.

9. The regenerative airflow generating device according to claim 1, characterized in that, The diversion component includes a second baffle plate disposed on the inner wall of the second pipe section. The second baffle plate is spaced apart from the heating element. The second baffle plate is arranged in a direction parallel to the width direction of the heating element and is vertically arranged or inclined relative to the vertical direction.

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

Images