Energy-saving low-dew-point rotating wheel dehumidification device
By introducing a water-cooled direct expansion device and a silicon controlled rectifier electric heater into the low dew point rotary dehumidifier, and combining the front and rear rotary wheels and heat exchangers, the problems of unrecovered heat from regenerated air and inaccurate temperature control are solved, achieving lower dew point dehumidification and energy savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SINOKING AIR CONDITIONING & REFRIGERATION CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-05-08
AI Technical Summary
Existing low dew point rotary dehumidifiers do not effectively recover and utilize heat during the regeneration air heating process, and the regeneration temperature control is inaccurate, resulting in energy waste and poor humidity control.
It employs a water-cooled direct expansion device and a silicon controlled rectifier electric heater, combined with front and rear impellers and heat exchangers, to achieve pre-dehumidification and deep dehumidification of humid air. The regeneration temperature is precisely regulated by the silicon controlled rectifier electric heater, and the heat from the regeneration exhaust air is recycled.
It achieves a lower dew point dehumidification effect, saves heater energy consumption, avoids heat waste, and improves humidity control accuracy and environmental friendliness.
Smart Images
Figure CN224215470U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of air conditioning dehumidification technology, and in particular relates to an energy-saving low dew point rotary dehumidification device. Background Technology
[0002] Currently, air dehumidification mainly includes cooling dehumidification and rotary dehumidification. Cooling dehumidification is quite effective in high-temperature and high-humidity environments where humidity requirements are not very strict. However, in places where both humidity and temperature requirements are high, cooling dehumidification struggles to achieve the desired humidity levels and consumes a significant amount of energy. Rotary dehumidifiers, on the other hand, are unaffected by the air's dew point and have a large dehumidification capacity. A rotary dehumidifier is a device that uses a rotating wheel made of solid desiccant for dehumidification. The core structure of a rotary dehumidifier is a continuously rotating honeycomb-shaped drying wheel, which is the most crucial component for moisture absorption. Its honeycomb structure not only maximizes the adhesion of the desiccant, increasing the surface area of contact between the humid air and the desiccant and improving the dehumidifier's efficiency, but also possesses high strength, making it well-suited for various complex working environments.
[0003] Currently used low dew point rotary dehumidifiers can produce low dew point dry air, but their drawbacks are that the regenerated air is heated by a proportional electric heater, and the moisture adsorbed on the rotor is vaporized and discharged through the regeneration zone of the rotor. The heat generated by the vaporization of moisture is discharged into the atmosphere along with the regenerated air by the regeneration fan, resulting in a great waste of resources and failing to achieve reasonable heat recovery and utilization. In addition, the electric heater is proportional and cannot precisely control the regeneration temperature, thus failing to achieve the required dew point. In contrast, the silicon controlled rectifier electric heater can achieve stepless adjustment. Utility Model Content
[0004] The purpose of this invention is to provide an energy-saving low dew point rotary dehumidifier to solve the above problems.
[0005] This utility model achieves the above objectives through the following technical solutions:
[0006] An energy-saving low dew point rotary dehumidifier includes a humid air inlet, a water-cooled direct expansion device, a pre-stage rotary dehumidifier, a fan, a post-stage rotary dehumidifier, a heat exchanger, and a regeneration exhaust fan. The outlet of the humid air inlet is connected to the inlet of the water-cooled direct expansion device, the outlet of the water-cooled direct expansion device is connected to the inlet of the lower part of the pre-stage rotary dehumidifier, the outlet of the lower part of the pre-stage rotary dehumidifier is connected to the inlet of the fan, the outlet of the fan is connected to the inlet of the post-stage rotary dehumidifier, the outlet of the lower part of the post-stage rotary dehumidifier is connected to the workshop, the outlet of the middle part of the post-stage rotary dehumidifier is connected to the inlet of the unheated regeneration air of the heat exchanger, the outlet of the heated regeneration air of the heat exchanger is connected to the inlet of the regeneration exhaust fan, and the outlet of the regeneration exhaust fan is connected to the high-temperature humid air inlet of the heat exchanger.
[0007] Preferably, a filter and a primary water coil are installed sequentially between the humid air inlet and the pipeline of the water-cooled direct expansion device.
[0008] Preferably, a filter and a secondary water coil are installed sequentially on the pipeline between the fan and the subsequent impeller.
[0009] Preferably, a three-stage water coil and an electric heater are installed sequentially on the pipeline between the rear impeller and the workshop.
[0010] Preferred configuration: The workshop is equipped with a return air vent, which is connected to the pipeline between the front impeller and the fan.
[0011] Preferably, the pipeline between the outlet of the heat exchanger's heated regenerated air and the inlet of the regenerated exhaust fan passes sequentially through the upper part of the rear impeller and the upper part of the front impeller. A silicon controlled rectifier (SCR) electric heater is installed between the pipeline of the heat exchanger's heated regenerated air and the upper part of the rear impeller, and a SCR electric heater is installed between the pipeline of the upper part of the rear impeller and the upper part of the front impeller.
[0012] Compared with existing technologies, the beneficial effects are as follows:
[0013] By sequentially connecting the humid air inlet, water-cooled direct expansion device, lower part of the pre-stage impeller, lower part of the post-stage impeller, and workshop, humid air can be pre-dehumidified by the air-cooled direct expansion device, and then the pre- and post-stage impellers can absorb moisture to achieve a lower dew point. The water coil and water-cooled direct expansion device can reduce the temperature of the treated air. The regenerated air is heated by a silicon controlled rectifier electric heater, which can be infinitely adjusted according to requirements, avoiding the fluctuations caused by excessive or insufficient proportional electric heating. A heat exchanger is installed in the regeneration air duct of the post-stage impeller, which can exchange heat with the high-temperature humid air discharged by the regeneration exhaust fan. The heat is recycled and does not affect the humidity of the regenerated air, which can better remove the humid air. The regenerated exhaust fan discharged air after heat exchange is at a lower temperature and is discharged into the environment, which is both safe and does not cause environmental damage. It effectively saves the energy consumption of the heater and has the advantages of being green, environmentally friendly and energy-saving. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure of an energy-saving low dew point rotary dehumidifier according to the present invention.
[0016] The annotations in the attached figures are explained as follows:
[0017] 1. Humid air inlet; 2. Filter; 3. Primary water coil; 4. Water-cooled direct expansion device; 5. Pre-stage impeller; 6. Fan; 7. Secondary water coil; 8. Post-stage impeller; 9. Tertiary water coil; 10. Electric heater; 11. Return air vent; 12. Heat exchanger; 13. Thyristor electric heater; 14. Regenerative exhaust fan. Detailed Implementation
[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.
[0019] The present invention will be further described below with reference to the accompanying drawings:
[0020] like Figure 1As shown, an energy-saving low dew point rotary dehumidifier includes a humid air inlet 1, a water-cooled direct expansion device 4, a pre-stage rotary dehumidifier 5, a fan 6, a post-stage rotary dehumidifier 8, a heat exchanger 12, and a regeneration exhaust fan 14. The outlet of the humid air inlet 1 is connected to the inlet of the water-cooled direct expansion device 4. A filter 2 and a primary water coil 3 are sequentially installed between the humid air inlet 1 and the water-cooled direct expansion device 4. The outlet of the water-cooled direct expansion device 4 is connected to the inlet of the lower part of the pre-stage rotary dehumidifier 5. The outlet of the lower part of the pre-stage rotary dehumidifier 5 is connected to the air inlet of the fan 6. The air outlet of the fan 6 is connected to the inlet of the post-stage rotary dehumidifier 8. A filter 2 and a secondary water coil 7 are sequentially installed on the pipeline between the fan 6 and the post-stage rotary dehumidifier 8. The outlet of the lower part of the post-stage rotary dehumidifier 8 is connected to the workshop. A tertiary water coil 9 and an electric heater 10 are sequentially installed on the pipeline between the post-stage rotary dehumidifier 8 and the workshop. The workshop is equipped with a return air inlet 11, which is connected to the pre-stage rotary dehumidifier 5. On the pipeline between the fan 6 and the rear impeller 8, the outlet of the middle part is connected to the inlet of the unheated regenerated air of the heat exchanger 12. The outlet of the heated regenerated air of the heat exchanger 12 is connected to the air inlet of the regeneration exhaust fan 14. The heat exchanger 12 exchanges heat with the high-temperature humid air discharged by the regeneration exhaust fan 14 and recycles the heat. The pipeline between the outlet of the heated regenerated air of the heat exchanger 12 and the air inlet of the regeneration exhaust fan 14 passes through the upper part of the rear impeller 8 and the upper part of the front impeller 5 in sequence. A silicon controlled rectifier electric heater 13 is installed between the pipeline of the heated regenerated air of the heat exchanger 12 and the upper part of the rear impeller 8. A silicon controlled rectifier electric heater 13 is installed between the pipeline of the upper part of the rear impeller 8 and the upper part of the front impeller 5. The silicon controlled rectifier electric heater 13 can be infinitely adjusted as required to control the regeneration temperature. The air outlet of the regeneration exhaust fan 14 is connected to the high-temperature humid air inlet 1 of the heat exchanger 12.
[0021] Working principle:
[0022] Pre-dehumidification: Humid air enters from humid air inlet 1 and passes through filter 2, primary water coil 3 for cooling, water-cooled direct expansion device 4 for further cooling and pre-dehumidification. If the ambient temperature is not high, primary water coil 3 and water-cooled direct expansion device 4 may not be working.
[0023] Re-dehumidification: The pre-dehumidified air comes into contact with silica gel and molecular sieve desiccant through the honeycomb-shaped small channels in the front rotor 5 and is dehumidified again;
[0024] Deep dehumidification: The air dehumidified by the pre-stage impeller 5 is mixed with the air in the workshop and enters the deep dehumidification channel. The humidity of the mixed air is reduced. It is drawn in by the fan 6 and discharged, filtered by the filter 2, cooled by the secondary water coil 7, and sent to the post-stage impeller 8 for deep dehumidification.
[0025] Regeneration heat exchange: A portion of the deeply dehumidified air exchanges heat with the high-temperature humid air discharged by the regeneration exhaust fan 14 in the heat exchanger 12, and then is heated by the silicon controlled rectifier electric heater 13. It then passes through the rear impeller 8 and the front impeller 5 in sequence, using high temperature to vaporize the moisture adsorbed on the impeller and discharge it with the regeneration air.
[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. An energy-saving low dew point rotary dehumidifier, characterized in that: The system includes a humid air inlet (1), a water-cooled direct expansion device (4), a pre-stage impeller (5), a fan (6), a post-stage impeller (8), a heat exchanger (12), and a regeneration exhaust fan (14). The outlet of the humid air inlet (1) is connected to the inlet of the water-cooled direct expansion device (4), the outlet of the water-cooled direct expansion device (4) is connected to the inlet of the lower part of the pre-stage impeller (5), and the outlet of the lower part of the pre-stage impeller (5) is connected to the air inlet of the fan (6). The air outlet of (6) is connected to the inlet of the rear impeller (8). The outlet of the lower part of the rear impeller (8) is connected to the workshop. The outlet of the middle part of the rear impeller (8) is connected to the inlet of the heat exchanger (12) for unheated regenerated air. The outlet of the heat exchanger (12) for heated regenerated air is connected to the air inlet of the regenerated exhaust fan (14). The air outlet of the regenerated exhaust fan (14) is connected to the high-temperature humid air inlet (1) of the heat exchanger (12).
2. The energy-saving low dew point rotary dehumidifier according to claim 1, characterized in that: A filter (2) and a primary water coil (3) are sequentially installed between the humid air inlet (1) and the water-cooled direct expansion device (4).
3. The energy-saving low dew point rotary dehumidifier according to claim 1, characterized in that: A filter (2) and a secondary water coil (7) are sequentially installed on the pipeline between the fan (6) and the subsequent impeller (8).
4. The energy-saving low dew point rotary dehumidifier according to claim 1, characterized in that: A three-stage water coil (9) and an electric heater (10) are sequentially installed on the pipeline between the rear impeller (8) and the workshop.
5. The energy-saving low dew point rotary dehumidifier according to claim 1, characterized in that: The workshop is equipped with a return air inlet (11), which is connected to the pipeline between the front impeller (5) and the fan (6).
6. The energy-saving low dew point rotary dehumidifier according to claim 1, characterized in that: The pipe between the outlet of the heat exchanger (12) where the regenerated air is heated and the inlet of the regenerated exhaust fan (14) passes sequentially through the upper part of the rear impeller (8) and the upper part of the front impeller (5). A thyristor electric heater (13) is provided between the pipe between the heat exchanger (12) where the regenerated air is heated and the upper part of the rear impeller (8). A thyristor electric heater (13) is provided between the pipe between the upper part of the rear impeller (8) and the upper part of the front impeller (5).