Regenerated airflow generating device and rotary dehumidifier

Abstract

The utility model provides a regenerated air flow generating device and a rotary dehumidifier, and the regenerated air flow generating device comprises a circulating air flow pipe which is provided with a first end and a second end which are opposite to each other, and the first end is provided with a regenerated air flow inlet; the regeneration fan is arranged at the first end of the circulating airflow pipe; and the heater is connected with the circulating airflow pipe and comprises a heating box, a plurality of PTC heating bodies arranged in the heating box side by side and a fixing frame used for fixing the PTC heating bodies in the heating box. According to the regeneration air flow generating device, the PTC heating bodies are arranged in the heating box side by side, the PTC heating bodies are adopted as heating elements, the safety performance is good, heating is uniform, the phenomenon that the surface is reddish like a tungsten filament is avoided, and a shielding part does not need to be arranged in a gap corresponding to the machine shell to shield light emitted by the tungsten filament; the PTC heating bodies are fixedly installed in the heating box through the fixing frames, installation is easy and convenient, and rapid assembly is facilitated.

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. Rotary dehumidifiers require a heating device to heat the regeneration zone of the rotor, drying the moisture there. The heating element in these devices is mostly tungsten filament, which is low-cost and heats up quickly, but has a short lifespan, is prone to aging, and produces uneven heating. The tungsten filament glows red when heated, necessitating additional shielding at the gaps in the dehumidifier's casing to block the emitted light, thus complicating the overall structure of the unit. Utility Model Content

[0003] The purpose of this application is to provide a regenerative airflow generator and a rotary dehumidifier that are simple in structure, have uniform heating, and good safety performance.

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

[0005] A circulating airflow pipe has a first end and a second end, the first end of which is provided with a regeneration airflow inlet, and the inner cavity of the circulating airflow pipe forms an air duct.

[0006] A regenerative fan is disposed at the first end of the circulating airflow duct to provide airflow to the second end;

[0007] A heater is connected to the second end of the circulating airflow pipe. The heater includes a heating box, a plurality of PTC heating elements arranged side by side in the heating box, and a fixing frame for fixing each of the PTC heating elements in the heating box. A regeneration airflow outlet is provided on the rear side of the heating box, and an opening communicating with the air duct is provided on the side of the heating box.

[0008] In one embodiment, the heating box and the circulating airflow pipe are integrally formed.

[0009] In one embodiment, two adjacent PTC heating elements are bonded and fixed together.

[0010] In one embodiment, the mounting bracket includes a mounting plate, an abutment portion connected to a first side of the mounting plate, and a mounting portion connected to a second side of the mounting plate. The abutment portion presses the heater against the heating box, and the mounting portion is connected to the heating box by screws passing through it.

[0011] In one embodiment, the abutting portion includes a plurality of abutting blocks spaced apart on a first side of the fixing plate, and the PTC heating element is pressed against the heating box by the abutting blocks.

[0012] In one embodiment, a stepped hole is provided on one side of the mounting part, and a connecting post adapted to the stepped hole is protruding inside the heating box. The connecting post has a hollow structure and is provided with internal threads. The connecting post is inserted into the stepped hole, and a screw passes through the mounting part and is screwed into the connecting post.

[0013] In one embodiment, the heating box extends inward at the regeneration gas outlet to form a plurality of support blocks, and the periphery of the heater abuts against each of the support blocks; a limiting block is provided on the side wall of the heating box away from the fixing frame, and the limiting block abuts against the heater to prevent the heater from detaching from the heating box.

[0014] In one embodiment, a ramp is provided in the air duct near the second end, and one end of the ramp at its higher point is connected to the side wall of the heating box where the opening is located.

[0015] In one embodiment, the heating box has a rectangular cross-section, and one end of the slope at its higher point is connected to two adjacent sidewalls of the heating box.

[0016] A rotary dehumidifier includes a rotary wheel and the aforementioned regenerative airflow generating device disposed on one side of the axial direction of the rotary wheel.

[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 multiple PTC heating elements arranged side by side in the heating box. The PTC heating elements heat the airflow delivered by the regenerative fan. The heated air flows from the regenerative airflow outlet to the rotor, carrying away the moisture in the regeneration zone of the rotor. Using PTC heating elements as heating elements has better safety performance, uniform heating, and does not produce a red-hot surface phenomenon like tungsten wire. There is no need to set up a shielding part in the corresponding gap of the casing to block the light emitted by the tungsten wire. Each PTC heating element is installed and fixed in the heating box by a fixing bracket, which is simple to install and facilitates rapid assembly. 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 a rotary dehumidifier provided in an embodiment of this application;

[0020] Figure 2 for Figure 1 The exploded view of the rotary dehumidifier shown.

[0021] Figure 3 for Figure 2 A perspective view of the regeneration airflow generating device in the rotary dehumidifier shown;

[0022] Figure 4 for Figure 3 A three-dimensional view of the regenerative airflow generator from another angle;

[0023] Figure 5 for Figure 3 Exploded view of the regenerative airflow generator shown;

[0024] Figure 6 for Figure 3 A partial explosion diagram of the regenerative airflow generator shown;

[0025] Figure 7 for Figure 5 The diagram shows the structure of the mounting frame in the regenerative airflow generator.

[0026] Figure 8 This is a partial sectional view of the heater;

[0027] Figure 9 for Figure 3 A partial structural schematic diagram of the regenerative airflow generator shown.

[0028] Figure 10 This is a schematic diagram of the PTC heating element.

[0029] The following are the labeling elements in the figure:

[0030] 10-Rotator; 20-Regenerative airflow generator; 30-Processing airflow generator; 40-Heat exchanger; 201-First housing; 202-Second housing; 21-Circulating airflow pipe; 22-Regenerative fan; 23-Heater; 210-Regenerative airflow inlet; 211-First end; 212-Second end; 213-Ramp; 220-Regenerative motor; 221-Fan; 230-Regenerative airflow outlet; 231 - Heating box; 232-PTC heating element; 233- Fixing bracket; 2310- Connecting post; 2311- Support block; 2312- Limiting block; 2313- Wiring hole; 2314- Positioning strip; 2320- Terminal block; 2330- Fixing plate; 2331- Abutting part; 2332- Mounting part; 2333- Abutting block; 2334- Stepped hole; 2335- Notch; 41- Inlet; 42- Outlet. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Please refer to the following: Figures 1 to 4 The regenerative airflow generating device 20 provided in this application embodiment will now be described. The regenerative airflow generating device 20 is disposed on one side of the axial direction of the rotor 10 of the rotary dehumidifier, and the rotor 10 is rotatably mounted on the frame via a shaft assembly. The regenerative airflow generating device 20 includes a circulating airflow pipe 21, a regenerative fan 22, and a heater 23. The circulating airflow pipe 21 has a generally flat structure, and its inner cavity forms an air duct. The circulating airflow pipe 21 has a first end 211 and a second end 212 opposite to each other. A regenerative airflow inlet 210 is provided on the rear side of the first end 211, that is, a regenerative airflow inlet 210 is provided on the side of the first end 211 closest to the rotor 10. The regenerative fan 22 is disposed at the first end 211 of the circulating airflow pipe 21 and provides airflow to the second end 212. (See reference...) Figure 4 , Figure 5The regeneration fan 22 includes a regeneration motor 220 and a fan 221. The regeneration motor 220 is fixed on the front side wall of the circulating airflow pipe 21. The fan 221 is located inside the first end 211 of the circulating airflow pipe 21. The fan 221 is connected to the output shaft of the regeneration motor 220. The position of the fan 221 is set directly opposite the regeneration airflow inlet 210.

[0036] See Figures 4 to 6 The heater 23 includes a heating box 231, multiple PTC heating elements 232, and a mounting bracket 233. The rotor 10 has a dehumidification zone and a regeneration zone, with the heating box 231 located on one side of the regeneration zone. The heating box 231 is connected to the second end 212 of the circulating airflow pipe 21, and the heating box 231 communicates with the inner cavity of the circulating airflow pipe 21. A regeneration airflow outlet 230 is provided on the rear side of the heating box 231, and an opening communicating with the air duct is provided on the side of the heating box 231. Multiple PTC heating elements 232 are arranged side by side inside the heating box 231, and the multiple PTC heating elements 232 are fixed inside the heating box 231 by the mounting bracket 233. Each PTC heating element 232 is fixed in the heating box 231 by a fixing bracket 233. That is, the PTC heating elements 232 are indirectly fixed in the heating box 231. After placing each PTC heating element 232 in the heating box 231, the fixing bracket 233 clamps each PTC heating element 232 in the heating box 231. The fixing bracket 233 can be connected to the heating box 231 by fasteners or snap-fit.

[0037] The airflow provided by the regeneration fan 22 flows into the heating box 231, is heated by the PTC heater 232 to form hot air, and flows from the regeneration airflow outlet 230 to the rotor 10, thereby carrying away the moisture in the regeneration zone of the rotor 10.

[0038] Compared with the prior art, the regenerative airflow generating device 20 provided in this application has multiple PTC heating elements 232 arranged side by side in the heating box 231. The PTC heating elements 232 heat the airflow delivered by the regenerative fan 22. The heated air flows from the regenerative airflow outlet 230 to the rotor 10, carrying away the moisture in the regeneration zone of the rotor 10. Using PTC heating elements 232 as heating elements has better safety performance, uniform heating, and does not produce a red-hot surface phenomenon like tungsten wire. There is no need to set up 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 heating elements 232 have a long service life, reducing maintenance costs. Each PTC heating element 232 is installed and fixed in the heating box 231 by a fixing bracket 233, which is simple to install and facilitates quick assembly.

[0039] See Figures 4 to 6Each PTC heating element 232 is fixed together by adhesive bonding. This allows the PTC heating elements 232 to be bonded together as a side-by-side heating module before the heater 23 is installed in the heating box 231, eliminating the need to install each PTC heating element 232 individually. One end of each PTC heating element 232 has a terminal block 2320, which is connected to the power supply of the dehumidifier 10 via a cable. The side wall of the heating box 231 has a cable routing hole 2313 for the cable to extend from.

[0040] The circulating airflow pipe 21 and the heating box 231 are integrally molded, which saves manufacturing steps. This integral molding 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 21 and the heating box 231 can be composed of two connected first housings 201 and second housings 202. A mutually cooperating positioning structure can be provided between the two housings to facilitate positioning and assembly.

[0041] See Figures 5 to 7 The mounting bracket 233 includes an integrally formed mounting plate 2330, an abutment portion 2331, and a mounting portion 2332. The length of the mounting plate 2330 is adapted to the heating box 231. The mounting plate 2330 has a notch 2335 to avoid the wiring terminals 2320 of the PTC heating element 232. When the wiring terminals 2320 of the PTC heating element 232 are installed in the heating box 231, they pass through the notch 2335. The abutment portion 2331 is connected to the first side of the mounting plate 2330, and the mounting portion 2332 is connected to the second side of the mounting plate 2330. The first and second sides of the mounting plate 2330 are opposite sides. The abutment portion 2331 is used to press each PTC heating element 232 of the heater 23 against the heating box 231. Screws are used to pass through the mounting portion 2332 and connect it to the heating box 231, thus fixing the PTC heating element 232 in the heating box 231 through the mounting bracket 233. The mounting section 2332 can be provided with multiple sections spaced apart, such as... Figure 7 As shown, two mounting parts 2332 are provided. Understandably, the mounting parts 2332 can also be installed and fixed to the heating box 231 by other means, such as fastening or other connection structures.

[0042] See Figures 5 to 8 The abutment portion 2331 on the fixing frame 233 includes a plurality of abutment blocks 2333, which are spaced apart on the first side of the fixing plate 2330. The PTC heating element 232 is pressed against the heating box 231 by the abutment blocks 2333. Specifically, one or more abutment blocks 2333 can be selected to press against the PTC heating element 232 according to its width, that is, each PTC heating element 232 is pressed against by at least one abutment block 2333.

[0043] A stepped hole 2334 is provided on one side of the mounting part 2332. A connecting post 2310 adapted to the stepped hole 2334 is provided inside the heating box 231. The connecting post 2310 has a hollow structure and internal threads. The connecting post 2310 is inserted into the stepped hole 2334, and a screw is used to screw the mounting part 2332 to the connecting post 2310. In this way, the fixing bracket 233 and the heating box 231 are connected and fixed. The fixing bracket 233 fixes the heater 23 in the heating box 231, and each PTC heating element 232 is fixed relative to the heating box 231.

[0044] See Figure 6 , Figure 8 and Figure 9 A limiting block 2312 is provided on the side wall of the heating box 231 away from the fixing frame 233. This limiting block 2312 abuts against the PTC heating element 232, thus preventing the PTC heating element 232 from detaching from the heating box 231. There are two limiting blocks 2312, and each limiting block 2312 abuts against a different PTC heating element 232. Understandably, the number of limiting blocks 2312 can also be set to more than two. Multiple support blocks 2311 are provided at the regeneration gas outlet 230 of the heating box 231. The support blocks 2311 extend inward into the area of ​​the regeneration gas outlet 230, and the periphery of the heater 23 abuts against each support block 2311.

[0045] See Figure 5 , Figure 6 and Figure 9 The support block 2311 is also provided with a positioning strip 2314 at the end away from the regeneration gas outlet 230. The support block 2311, the positioning strip 2314 and the heating box 231 are integrally formed. The positioning strip 2314 is formed on the inner side wall of the heating box 231. In this way, when the fixing bracket 233 is not placed in the heating box 231, the PTC heating element 232 is first placed into the heating box 231. At this time, the three sides of the heater 23 abut against the corresponding positioning strips 2314. Then the fixing bracket 233 is placed into the heating box 231 and fixed with screws. The positioning and installation of the heater 23 is completed. The operation is simple and convenient.

[0046] Please see Figure 3 , Figure 5 , Figure 6 The circulating air duct has a ramp 213 located near the second end 212 inside the air duct. The higher end of the ramp 213 is connected to the side wall of the heating box 231 with an opening. In this way, by setting the ramp 213, the amount of backflow air can be reduced, allowing more airflow to flow smoothly into the heating box 231.

[0047] The heating box 231 has a rectangular cross-section, and one end of the higher part of the ramp 213 is connected to the two adjacent side walls of the heating box 231. That is to say, most of the higher part of the ramp 213 is connected to one side wall of the heating box 231, and the remaining part is connected to the other adjacent side wall of the heating box 231. This increases the air intake area and thus increases the air volume.

[0048] Please see Figure 1 , Figure 2 , Figure 4 The rotary dehumidifier provided in this application includes a rotary wheel 10 and a regenerative airflow generating device 20 as described in the above embodiments. The regenerative airflow generating device 20 is disposed on one side of the axial direction of the rotary wheel 10. The rotary dehumidifier also includes a heat exchanger 40 and a processing airflow generating device 30. The processing airflow generating device 30 and the regenerative airflow generating device 20 are disposed on the same side of the rotary wheel 10, and the heat exchanger 40 is disposed on the other side of the rotary wheel 10. The processing airflow generating device 30 is used to provide processing airflow through the rotary wheel 10 to complete dehumidification and discharge the dehumidified airflow outside the rotary dehumidifier. The regenerative airflow inlet 210 is connected to the outlet 42 of the heat exchanger 40, and the regenerative airflow outlet 230 is connected to the inlet 41 of the heat exchanger 40.

[0049] It should be noted that the PTC heating element shown in each figure has a block-like structure, but it does have a heat dissipation structure, which is not shown. Specifically, refer to... Figure 10 The PTC heating element 232 includes a PTC heating element 2321, a fixing frame 2322, and heat dissipation strips 2323. The PTC heating element 2321 is fixed to the fixing frame 2322. The wiring terminals 2320 of the PTC heating element 2321 extend from one end of the fixing frame 2322. Two heat dissipation strips 2323 are provided in the fixing frame 2322. The heat dissipation strips 2323 are bent into a wavy structure, thus forming a channel for airflow within the fixing frame 2322. The heat dissipation strips 2323 can be made of a material with good thermal conductivity, such as bent aluminum strips. The number of heat dissipation strips 2323 in the PTC heating element 2322 can be increased or decreased according to actual needs.

[0050] 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: A circulating airflow pipe has a first end and a second end, the first end of which is provided with a regeneration airflow inlet, and the inner cavity of the circulating airflow pipe forms an air duct. A regenerative fan is disposed at the first end of the circulating airflow duct to provide airflow to the second end; A heater is connected to the second end of the circulating airflow pipe. The heater includes a heating box, a plurality of PTC heating elements arranged side by side in the heating box, and a fixing frame for fixing each of the PTC heating elements in the heating box. A regeneration airflow outlet is provided on the rear side of the heating box, and an opening communicating with the air duct is provided on the side of the heating box.

2. The regenerative airflow generating device as described in claim 1, characterized in that: The heating box and the circulating airflow pipe are integrally formed.

3. The regenerative airflow generating device as described in claim 1, characterized in that: Two adjacent PTC heating elements are bonded and fixed together.

4. The regenerative airflow generating device as described in claim 3, characterized in that: The fixing frame includes a fixing plate, an abutment portion connected to a first side of the fixing plate, and a mounting portion connected to a second side of the fixing plate. The abutment portion presses the heater against the heating box, and the mounting portion is connected to the heating box by screws passing through it.

5. The regenerative airflow generating device as described in claim 4, characterized in that: The abutting part includes a plurality of abutting blocks spaced apart on the first side of the fixing plate, and the PTC heating element is pressed against the heating box by the abutting blocks.

6. The regenerative airflow generating device as described in claim 4, characterized in that: A stepped hole is provided on one side of the mounting part, and a connecting post adapted to the stepped hole is protruding inside the heating box. The connecting post has a hollow structure and internal threads. The connecting post is inserted into the stepped hole, and a screw passes through the mounting part and is screwed into the connecting post.

7. The regenerative airflow generating device according to any one of claims 1-6, characterized in that: The heating box extends inward at the regeneration gas outlet to form multiple support blocks, and the periphery of the heater abuts against each of the support blocks; a limiting block is provided on the side wall of the heating box away from the fixing frame, and the limiting block abuts against the heater to prevent the heater from detaching from the heating box.

8. The regenerative airflow generating device according to any one of claims 1-6, characterized in that: A ramp is provided inside the air duct near the second end, and one end of the ramp at its higher point is connected to the side wall of the heating box where the opening is located.

9. The regenerative airflow generating device as described in claim 8, characterized in that: The heating box has a rectangular cross-section, and one end of the slope at the higher point is connected to two adjacent side walls in the heating box.

10. A rotary dehumidifier, characterized in that: It includes a rotor and a regenerative airflow generating device as described in any one of claims 1-9, disposed on one side of the rotor's axial direction.

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