Energy-saving deep dehumidifier for underground space

Abstract

The utility model provides an energy-saving deep dehumidifier for underground space, which comprises a rotating wheel wind processing module and a rotating wheel wind regeneration module, and a dehumidifying rotating wheel is provided with a dehumidifying rotating wheel processing area and a dehumidifying rotating wheel regeneration area. The rotating wheel air processing module comprises a return air inlet, a return air filter, a dehumidification rotating wheel processing area, a dehumidification rotating wheel bypass ventilation opening, an air supply surface air cooler, an air supply heater, an air supply fan, an air supply filter and an air supply opening. The rotating wheel regeneration air module comprises a regeneration air inlet, a regeneration air inlet filter, a regeneration heater, a dehumidification rotating wheel regeneration area, a regeneration fan and a regeneration air exhaust surface air cooler; the dehumidification device has the advantages that the structure is simple, driving is easy, dehumidification efficiency is high, the temperature and humidity of supplied air can be accurately controlled, physical adsorbents are adopted in the rotating wheel, and continuous and stable dehumidification can be achieved without supplementing the adsorbents.

Description

Technical Field

[0001] This utility model relates to the field of dehumidification technology, and in particular to an energy-saving deep dehumidifier for underground spaces. Background Technology

[0002] The effects of uncontrolled humidity in underground spaces mainly include the following aspects: (1) causing physical discomfort, deterioration of air quality, visual pollution, and humidity imbalance, significantly reducing environmental comfort; (2) causing reduced concrete strength, corrosion of metal components, wall expansion or cracking, affecting foundation stability; (3) causing corrosion of electrical equipment, triggering circuit system failures, and reducing equipment lifespan. Therefore, humidity control in underground spaces is a key issue in ensuring environmental comfort, structural safety, and equipment lifespan.

[0003] Generally, humidity control in underground spaces is achieved through methods such as condensation dehumidification, solution dehumidification, and ventilation dehumidification. However, due to the limitations of traditional humidity control solutions, there is still a need to develop specialized temperature and humidity control solutions for underground spaces, especially suitable for enclosed spaces such as basements, underground garages, storage facilities, tunnels, and air-raid shelters.

[0004] Condensation dehumidification cools air to below the dew point using a compressor, causing moisture to condense and be discharged. It is low-cost, technologically mature, and easy to maintain. However, it is inefficient at low temperatures (<10℃) and may even cause frost formation, leading to operational failure. Solution dehumidification absorbs moisture from the air using solutions such as lithium chloride, and then regenerates and concentrates it through heating, achieving simultaneous cooling and dehumidification. However, these solutions are corrosive, requiring anti-corrosion treatment of the equipment, and the system piping is complex. Ventilation dehumidification introduces dry fresh air naturally or mechanically to replace humid air. It is low-cost, but is greatly affected by external climate and cannot precisely control humidity. Utility Model Content

[0005] To overcome the aforementioned problems in the existing technology, this utility model provides an energy-saving deep dehumidifier for underground spaces.

[0006] This utility model discloses an energy-saving deep dehumidifier for underground spaces, comprising a rotary dehumidifier processing air module and a rotary dehumidifier regeneration air module. The dehumidifier rotary wheel is provided with a dehumidifier processing area and a dehumidifier regeneration area. The rotary dehumidifier processing air module includes a return air inlet, a return air filter, a dehumidifier rotary processing area, a dehumidifier side ventilation outlet, an air supply surface cooler, an air supply heater, an air supply fan, an air supply filter, and an air supply outlet. The rotary dehumidifier regeneration air module includes a regeneration air inlet, a regeneration air inlet filter, a regeneration heater, a dehumidifier rotary regeneration area, a regeneration fan, and a regeneration exhaust air surface cooler.

[0007] Based on this, the return air inlet, return air filter, dehumidification rotor treatment area, supply air surface cooler, supply air heater, supply fan, supply air filter and supply air outlet are connected in sequence, and the ventilation opening next to the dehumidification rotor is set below the dehumidification rotor treatment area.

[0008] Based on this, the regeneration air inlet, regeneration air filter, regeneration heater, dehumidification wheel regeneration zone, regeneration fan and regeneration exhaust air cooler are connected in sequence, and the other end of the regeneration exhaust air cooler is connected between the regeneration air inlet and the regeneration air filter.

[0009] Based on this, a temperature and humidity sensor is installed at the return air inlet to detect the temperature and relative humidity of the return air in the underground space; a filter differential pressure switch is installed after the return air filter to detect whether the filter is clogged; differential pressure sensors are installed in the dehumidification rotor treatment area, dehumidification rotor regeneration area, and dehumidification rotor side ventilation outlet to detect the dehumidification rotor treatment air volume, regeneration air volume, and side ventilation volume; a differential pressure switch and an over-temperature switch are installed after the supply air heater for no-airflow detection and over-temperature detection; a differential pressure switch is installed after the supply air filter to detect whether the filter is clogged; and a temperature and humidity sensor is installed at the air outlet. The system includes a filter for detecting supply air temperature and relative humidity; a filter differential pressure switch is installed after the regeneration inlet filter to detect filter blockage; a temperature sensor and over-temperature switch are installed after the regeneration heater to detect regeneration heating temperature and over-temperature; frequency converters are configured for the regeneration fan and supply fan to adjust regeneration air volume and supply air volume; a temperature sensor is installed after the regeneration exhaust air cooler to detect the outlet air temperature of the regeneration exhaust air cooler; a temperature sensor is installed after the regeneration zone of the dehumidifying impeller to detect the regeneration exhaust air temperature; and a speed sensor is configured for the dehumidifying impeller to detect impeller speed.

[0010] In addition, an automatic control system is also included. The automatic control system collects, converts, calculates and transmits the electrical signals of the temperature sensor, humidity sensor, differential pressure sensor, rotor speed sensor, differential pressure switch and over-temperature switch set in the system through a PLC data acquisition module. It monitors and controls the operating status of the blower, the regeneration blower, the rotor geared motor, the dehumidifying rotor, the air supply cooler, the air supply heater, the regeneration heater, the regeneration exhaust cooler, the return air filter, the regeneration inlet air filter and the air supply filter.

[0011] Based on this, the regeneration heating temperature of the dehumidification rotor is 80-120℃, and the regeneration heating method adopts heat pump, hot water, saturated steam, electricity or hot oil.

[0012] Based on this, the dehumidifying impeller regeneration exhaust temperature is 40-60℃. The high-temperature and high-humidity regeneration exhaust is cooled and reused as regeneration intake air. The regeneration exhaust cooling method adopts air cooling, water cooling or direct expansion cooling.

[0013] Based on this, the dehumidifying impeller, driven by the impeller reduction motor, rotates continuously from the dehumidifying impeller regeneration zone to the dehumidifying impeller processing zone at a speed of 5 to 20 rph.

[0014] Based on this, the dehumidification wheel is driven by a belt or a chain.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) The energy-saving deep dehumidifier for underground space of this utility model has a simple structure, simple drive, high dehumidification efficiency, and can achieve precise control of air supply temperature and humidity. The rotor uses physical adsorbent and can achieve continuous and stable dehumidification without the need to replenish adsorbent.

[0017] (2) The energy-saving deep dehumidifier for underground space of this utility model adopts a full return air design, which does not need to bear the heat and humidity load of outdoor fresh air, which can reduce the cooling and heating power of the system and reduce the initial investment cost; it does not need to deal with the temperature and humidity fluctuations brought by fresh air frequently, and the system operates more stably; it avoids outdoor dust and pollutants from entering the system and extends the service life of the air filter; it reduces the amount of air handled by the impeller and reduces the initial investment cost.

[0018] (3) The energy-saving deep dehumidifier for underground space of this utility model adopts the recycling of regenerated exhaust air, which can avoid the space occupation of exhaust duct layout; eliminate the installation steps of regenerated exhaust pipe, reduce construction complexity and material cost; avoid problems such as dust and mold accumulation in exhaust pipe, reduce long-term maintenance costs; avoid the problem of poor ventilation in exhaust system, and ensure the stability of deep dehumidifier operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the working principle of the energy-saving deep dehumidifier for underground spaces.

[0020] Figure 2 This is a schematic diagram of the partitioned structure of the dehumidifying rotor of this utility model.

[0021] In the diagram: 1. Return air inlet, 2. Return air filter, 3. Dehumidifier impeller, 4. Ventilation outlet beside the dehumidifier impeller, 5. Supply air cooler, 6. Supply air heater, 7. Supply fan, 8. Supply air filter, 9. Supply air outlet, 10. Regeneration air inlet, 11. Regeneration air inlet filter, 12. Regeneration heater, 13. Regeneration fan, 14. Regeneration exhaust air cooler, 15. Dehumidifier impeller processing area, 16. Dehumidifier impeller regeneration area. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0023] This utility model discloses an energy-saving deep dehumidifier for underground spaces, including a rotary processing air module and a rotary regeneration air module. The dehumidifying rotary wheel 3 is provided with a dehumidifying rotary processing area 15 and a dehumidifying rotary regeneration area 16. The rotary processing air module includes a return air inlet 1, a return air filter 2, a dehumidifying rotary processing area 15, a dehumidifying rotary side ventilation outlet 4, an air supply surface cooler 5, an air supply heater 6, an air supply fan 7, an air supply filter 8, and an air supply outlet 9. The return air inlet 1, return air filter 2, dehumidifying rotary processing area 15, air supply surface cooler 5, air supply heater 6, air supply fan 7, air supply filter 8, and air supply outlet 9 are connected in sequence. The dehumidifying rotary side ventilation outlet 4 is located below the dehumidifying rotary processing area 15.

[0024] In the rotary dehumidifier air handling module, the return air from the underground space is drawn by the supply fan 7 to the return air inlet 1, where a return air filter 2 is installed to filter out pollutants and prevent dust accumulation on the dehumidifier rotor 3, which would lead to a decrease in dehumidification performance. 10%–20% of the filtered return air flows through the dehumidifier rotor 3 located after the return air filter 2, and is then adsorbed by the dehumidifier rotor treatment zone 15 to obtain high-temperature dry air. 80%–90% of the filtered return air flows through the ventilation vent 4 located below the dehumidifier rotor treatment zone 15, mixing with the high-temperature dry air obtained after adsorption in the dehumidifier rotor treatment zone 15. If the temperature of the mixed air is higher than the target temperature of the underground space, the automatic control system controls the supply air surface cooler 5 to operate. When the air supply heater 6 is not in operation, the mixed air enters the air supply surface cooler 5 and exchanges heat with the cold fluid inside to obtain low-temperature dry air. If the obtained mixed air temperature is lower than the target temperature of the underground space, the automatic control system controls the air supply surface cooler 5 to be in operation and the air supply heater 6 to be in operation. The mixed air passes through the air supply surface cooler 5 and enters the air supply heater 6, where it exchanges heat with the hot fluid inside to obtain high-temperature dry air. The air supply fan 7, located after the air supply heater 6, sends the low-temperature dry air or high-temperature dry air into the air supply filter 8 to filter pollutants in the air supply and ensure the cleanliness of the underground space environment. Subsequently, the filtered air is sent into the underground space through the air supply outlet 9.

[0025] The rotary regeneration air module includes a regeneration air inlet 10, a regeneration air inlet filter 11, a regeneration heater 12, a dehumidifying rotary regeneration zone 16, a regeneration fan 13, and a regeneration exhaust air surface cooler 14. The regeneration air inlet 10, the regeneration air inlet filter 11, the regeneration heater 12, the dehumidifying rotary regeneration zone 16, the regeneration fan 13, and the regeneration exhaust air surface cooler 14 are connected in sequence, and the other end of the regeneration exhaust air surface cooler 14 is connected between the regeneration air inlet 10 and the regeneration air inlet filter 11.

[0026] In the rotary regeneration air module, the regeneration air intake is directly drawn from the underground space. When the system starts, the regeneration fan 13, located after the dehumidifying rotary regeneration zone 16, draws the return air from the underground space into the regeneration air intake 10. A regeneration air intake filter 11 is then installed to filter pollutants in the regeneration air intake, preventing dust accumulation on the dehumidifying rotary wheel 3 and thus reducing its dehumidification performance. The filtered regeneration airflow is heated by the regeneration heater 12, located after the regeneration air intake filter 11, to obtain high-temperature hot air. It then enters the dehumidifying rotary regeneration zone 16, located after the regeneration heater 12, and passes through the dehumidifying rotary wheel... After desorption in regeneration zone 16, high-temperature and high-humidity regeneration exhaust air is obtained. The high-temperature and high-humidity regeneration exhaust air enters the regeneration exhaust air surface cooler 14, which is set before the regeneration heater 12, and exchanges heat with the cold fluid inside to obtain low-temperature and low-humidity air. When the system is running stably, the low-temperature and low-humidity air flows through the regeneration heater 12, which is set after the regeneration inlet filter 11, and is heated to obtain high-temperature hot air. Then it enters the dehumidification rotary regeneration zone 16, which is set after the regeneration heater 12. After desorption in the dehumidification rotary regeneration zone 16, high-temperature and high-humidity regeneration exhaust air is obtained, and this cycle repeats.

[0027] A temperature and humidity sensor is installed at the return air inlet 1. A filter differential pressure switch is installed after the return air filter 2. Differential pressure sensors are installed in the dehumidification rotor treatment area 15 and the dehumidification rotor regeneration area 16 respectively. A differential pressure switch and an over-temperature switch are installed after the supply air heater 6. A differential pressure switch is installed after the supply air filter 8. A temperature and humidity sensor is installed at the supply air outlet 9. A filter differential pressure switch is installed after the regeneration inlet filter 11. A temperature sensor and an over-temperature switch are installed after the regeneration heater 12. Inverters are configured for the regeneration fan 13 and the supply fan 7. A temperature sensor is installed after the regeneration exhaust air surface cooler 14. A temperature sensor is installed in the dehumidification rotor regeneration area 16. A speed sensor is configured for the dehumidification rotor 3.

[0028] The basic working principle of the energy-saving deep dehumidifier is as follows: the blower 7 draws return air from the underground space into the unit. 10% to 20% of the return air flows through the dehumidification impeller 3 for adsorption and dehumidification, while 80% to 90% of the return air is directly mixed with the dehumidified air from the dehumidification impeller 3. After being conditioned by the air supply surface cooler 5 and the air supply heater 6, the dry air is then sent back to the underground space. The air supply surface cooling method can be water cooling (chilled water and ethylene glycol ice water, etc.) or direct expansion cooling, etc., and the air supply heating method can be hot water, heat pump, saturated steam, and electricity, etc. At the same time, the regeneration blower 13 draws regenerated air into the regeneration heater 12. After obtaining regenerated hot air, it flows through the dehumidified dehumidification impeller 3 to achieve desorption, thereby restoring and improving the dehumidification capacity of the dehumidification impeller 3.

[0029] The regeneration heating temperature of dehumidifier rotor 3 is 80-120℃, and the regeneration heating method can be heat pump, hot water, saturated steam, electricity, or thermal oil. The regeneration exhaust temperature of dehumidifier rotor 3 is 40-60℃. The high-temperature and high-humidity regeneration exhaust air can be cooled and reused as regeneration intake air. The regeneration exhaust air cooling method can be air cooling, water cooling groundwater, chilled water, ethylene glycol ice water, or direct expansion cooling. The dehumidifier's treatment-side air inlet, treatment-side air outlet, and regeneration-side air inlet are all equipped with filters for dust prevention. The air outlet filter can be a pre-filter, bag filter, or electrostatic precipitator filter, etc. The air outlet filter on the treatment side can be a medium-efficiency bag filter, a sub-high-efficiency bag filter, or a high-efficiency V-type filter, etc. The air inlet on the regeneration side can be a pre-filter with high temperature resistance. The dehumidifying rotor 3 is driven by a rotor reduction motor and rotates continuously from the rotor regeneration zone to the rotor treatment zone at a speed of 5-20 rph to achieve continuous and stable dehumidification. The dehumidifying rotor 3 can be driven by a belt drive or a chain drive.

[0030] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", "pad", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An energy-saving deep dehumidifier for underground spaces, characterized in that: The dehumidifier includes a dehumidifier processing air module and a dehumidifier regeneration air module. The dehumidifier (3) is provided with a dehumidifier processing area (15) and a dehumidifier regeneration area (16). The dehumidifier processing air module includes a return air inlet (1), a return air filter (2), a dehumidifier processing area (15), a dehumidifier side ventilation outlet (4), an air supply surface cooler (5), an air supply heater (6), an air supply fan (7), an air supply filter (8), and an air supply outlet (9). The dehumidifier regeneration air module includes a regeneration air inlet (10), a regeneration air inlet filter (11), a regeneration heater (12), a dehumidifier regeneration area (16), a regeneration fan (13), and a regeneration exhaust air surface cooler (14).

2. The energy-efficient deep dehumidifier for underground spaces according to claim 1, characterized by: The return air inlet (1), return air filter (2), dehumidification rotor treatment area (15), air supply surface cooler (5), air supply heater (6), air supply fan (7), air supply filter (8) and air supply outlet (9) are connected in sequence, and the ventilation outlet (4) next to the dehumidification rotor is located below the dehumidification rotor treatment area (15).

3. The energy-saving deep dehumidifier for underground spaces according to claim 2, characterized in that: The regeneration air inlet (10), regeneration air filter (11), regeneration heater (12), dehumidification rotor regeneration zone (16), regeneration fan (13) and regeneration exhaust air cooler (14) are connected in sequence, and the other end of the regeneration exhaust air cooler (14) is connected between the regeneration air inlet (10) and the regeneration air filter (11).

4. The energy-saving type deep dehumidifier for underground space according to claim 3, characterized by: A temperature and humidity sensor is installed at the return air inlet (1), a filter differential pressure switch is installed after the return air filter (2), differential pressure sensors are installed at the dehumidification rotor processing area (15), the dehumidification rotor regeneration area (16) and the ventilation outlet (4) next to the dehumidification rotor, a differential pressure switch and an over-temperature switch are installed after the supply air heater (6), a differential pressure switch is installed after the supply air filter (8), a temperature and humidity sensor is installed at the supply air outlet (9), a filter differential pressure switch is installed after the regeneration air inlet filter (11), a temperature sensor and an over-temperature switch are installed after the regeneration heater (12), frequency converters are configured for the regeneration fan (13) and the supply fan (7), a temperature sensor is installed after the regeneration exhaust air surface cooler (14), a temperature sensor is installed after the dehumidification rotor regeneration area (16), and a speed sensor is configured for the dehumidification rotor (3).

5. The energy-efficient deep dehumidifier for underground spaces according to claim 1, characterized by: The dehumidification impeller (3) has a regeneration heating temperature of 80-120℃, and the regeneration heating method is heat pump, hot water, saturated steam, electricity or hot oil.

6. The energy-efficient deep dehumidifier for underground spaces according to claim 1, characterized by: The dehumidifying impeller (3) has a regeneration exhaust temperature of 40-60°C. The high-temperature and high-humidity regeneration exhaust is cooled and then used as regeneration intake air. The regeneration exhaust cooling method is air cooling, water cooling or direct expansion cooling.

7. The energy-efficient deep dehumidifier for underground spaces according to claim 4, characterized by: Driven by a dehumidifying wheel reducer motor, the dehumidifying wheel (3) rotates continuously from the dehumidifying wheel regeneration zone (16) to the dehumidifying wheel processing zone (15) at a speed of 5 to 20 rph.

8. The energy-saving deep dehumidifier for underground spaces according to claim 2, characterized in that: The dehumidifying impeller (3) is driven by a belt or a chain.

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