Multi-pass rotary dehumidification system with heat recovery device and working method thereof

Abstract

The application relates to a multi-channel rotary dehumidifier system with a heat recovery device and a working method thereof, and belongs to the technical field of rotary dehumidifiers, which comprises a rotary body, a dehumidifying unit, a regenerating unit, a heat pump unit one and a heat pump unit two. The rotary body comprises area A, area B, area C and area D arranged in sequence along the clockwise direction. The dehumidifying unit is connected with area A and area B respectively and is used for discharging dry air after converting input humid air. The regenerating unit is connected with area C and area D respectively and is used for recovering the moisture absorption function of the rotary body. The heat pump unit one is connected with the rear end of area C and the rear end of area B respectively, and the heat pump unit two is connected with the front end of area D and the front end of area A respectively. The application increases the dehumidifying channel and the regenerating channel, thereby obtaining dry air which is deeply dehumidified, effectively saving the unit space and reducing the energy consumption.

Description

Technical Field

[0001] This invention relates to a multi-channel rotary dehumidification system with a heat recovery device and its working method, belonging to the technical field of rotary dehumidifiers. Background Technology

[0002] With social development and progress, humidity, as an important air quality indicator, is receiving increasing attention in both industrial and civilian sectors. Commonly used dehumidification systems include cooling dehumidification systems, rotary dehumidification systems, and solution dehumidification systems. Rotary dehumidification systems are widely used in daily life due to their advantages of simple structure and long service life.

[0003] Traditional rotary dehumidifier systems use 2 / 3 to 3 / 4 of the dehumidifier's channels as the fresh air dehumidification zone and 1 / 3 to 1 / 4 of the channels as the air regeneration zone. Although this method can produce relatively dry air, it consumes a lot of energy, is inefficient, and does not fully utilize the cooling and heating capacity of the rotary dehumidifier system.

[0004] A rotary dehumidifier unit and a rotary dehumidifier unit regenerative heat insulation device disclosed in Chinese utility model patent with publication number CN202336283U include: an outer frame, a number of horizontally placed blades arranged in the outer frame, the blade shafts of the blades being connected by an electric lever, and an electric head driving each blade to rotate synchronously through the electric lever.

[0005] The above-mentioned reference example is a two-channel dehumidification scheme, which cannot fully utilize the cooling and heating energy of the rotary dehumidification system, and has high energy consumption and low efficiency, so it urgently needs to be improved. Summary of the Invention

[0006] To overcome the shortcomings of existing rotary dehumidifiers, such as high energy consumption, low efficiency, and inability to fully utilize the heat and cold generated by the rotary dehumidifier system, this invention designs a multi-channel rotary dehumidifier system with a heat recovery device and its working method. It increases the dehumidification channel and regeneration channel to obtain dry air that has undergone deep dehumidification, effectively saving unit space and reducing energy consumption.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Technical Solution 1

[0009] A multi-channel rotary dehumidification system with a heat recovery device includes a rotary body, a dehumidification unit, a regeneration unit, a heat pump unit one, and a heat pump unit two. The rotary body includes regions A, B, C, and D arranged clockwise. The dehumidification unit is connected to regions A and B respectively and is used to convert the input humid air into dry air before discharging it. The regeneration unit is connected to regions C and D respectively and is used to restore the moisture absorption function of the rotary body. The heat pump unit one is connected to the rear end of region C and the rear end of region B respectively, and the heat pump unit two is connected to the front end of region D and the front end of region A respectively.

[0010] Furthermore, the regeneration unit includes a regeneration air inlet channel and a primary regeneration air outlet channel. One end of the regeneration air inlet channel runs from front to back through region D and connects to one end of the primary regeneration air outlet channel. The free end of the primary regeneration air outlet channel runs from back to front through region C. An air heat exchanger is also provided between the regeneration air inlet channel and the primary regeneration air outlet channel located at the front end of the rotor body.

[0011] Furthermore, the dehumidification unit includes a dehumidification air inlet channel and a dehumidification air outlet channel. One end of the dehumidification air inlet channel runs from front to back through region A and connects to one end of the dehumidification air outlet channel. The free end of the dehumidification air outlet channel runs from back to front through region B. A connecting channel 1 is also connected between the dehumidification air inlet channel and the dehumidification air outlet channel located at the front end of the rotor body.

[0012] Furthermore, a secondary regeneration exhaust duct is connected to the primary regeneration exhaust duct at the front end of the air heat exchanger, and an air heat exchanger is installed between the secondary regeneration exhaust duct and the dehumidification exhaust duct.

[0013] Furthermore, the heat pump unit includes a condenser, a compressor, an evaporator, and a throttling valve connected in sequence to form a circulation loop. The condenser is located on the primary regeneration exhaust duct at the rear end of zone C, and the evaporator is located on the dehumidification exhaust duct at the rear end of zone B.

[0014] Furthermore, the second heat pump unit includes a second condenser, a second compressor, a second evaporator, and a second throttling valve connected in sequence to form a circulation loop. The second condenser is located on the regeneration air inlet channel at the front end of region D and is located at the rear end of the first air heat exchanger. The second evaporator is located on the dehumidification air inlet channel at the front end of region A and is located at the front end of the first connecting channel.

[0015] Furthermore, a second connecting channel is provided between the regeneration air inlet channel and the dehumidification air inlet channel located at the front end of the rotor body.

[0016] Technical Solution Two

[0017] The working method of the multi-channel rotary dehumidification system with heat recovery device in the above-mentioned technical solution one includes the following process:

[0018] When the system starts working, humid air enters through the dehumidification air inlet channel and undergoes a cooling and dehumidification process through evaporator two to obtain dry air. Then, the automatic control system determines whether the dry air output by evaporator two meets the requirements. If it does, the dry air enters the connection channel one and is discharged outward from the dehumidification exhaust channel outlet.

[0019] If the primary dry air output from evaporator 2 does not meet the requirements, then connection channel 1 is closed. The primary dry air passes through zone A for rotary dehumidification, then enters evaporator 1 for secondary cooling and dehumidification, and then enters the dehumidification exhaust channel. The primary dry air in the dehumidification exhaust channel finally undergoes isenthalpic dehumidification in zone B to obtain secondary dry air, and then is discharged outward from the outlet end of the dehumidification exhaust channel.

[0020] Furthermore, the process also includes the following steps: When the system starts working and the automatic control system determines that the primary dry air output by evaporator 2 does not meet the requirements, fresh air enters through the regeneration air inlet channel and passes through air heat exchanger 1 and condenser 2 in sequence to obtain high-temperature air. The high-temperature air continues to pass through area D and carries away the moisture adsorbed by the rotor body, resulting in low-temperature and humid air. Then, the low-temperature and humid air enters the primary regeneration exhaust channel and continues to pass through condenser 1, where it is heated again and enters area C to continue carrying away the moisture adsorbed by the rotor body. Finally, it is discharged through the outlet end of the primary regeneration exhaust channel.

[0021] Furthermore, the air portion passing through area C from back to front enters the secondary regeneration exhaust duct and is discharged through the secondary regeneration exhaust duct after passing through the second air heat exchanger.

[0022] Compared with the prior art, the present invention has the following features and beneficial effects:

[0023] 1. This invention divides the rotor of the rotary dehumidifier into four parts, adds a dehumidification channel and a regeneration channel, and can perform deep dehumidification of the air using only one rotary dehumidification system, effectively saving unit space. It also makes full use of the heat exchange in the system through the heat pump unit, thus reducing energy consumption.

[0024] 2. This invention utilizes two built-in refrigeration systems, both of which can be used for both cooling and heating simultaneously, thereby effectively improving energy efficiency.

[0025] 3. By setting up two air heat exchangers, the present invention can realize the recovery and utilization of waste heat, further improving the energy utilization rate.

[0026] 4. By setting up the first connection channel, this invention can effectively save energy by only turning on the surface cooling dehumidification when the humidity requirement is not high.

[0027] 5. By setting up the second connection channel 24, when the outdoor air is humid, the regeneration capacity decreases due to the high humidity of the air in the regeneration air intake channel 2. A portion of the dried air can be sacrificed and introduced into the regeneration air intake channel 2, thereby reducing the humidity of the regeneration air and improving the regeneration capacity.

[0028] 6. By setting up multiple channels and combining various working conditions, this invention can maximize energy utilization while saving energy, and can effectively switch between different working states for different environmental conditions, thereby effectively improving applicability. Attached Figure Description

[0029] Figure 1 This is a connection diagram of the present invention;

[0030] Figure 2 This is an enthalpy-humidity diagram of one of the working modes of the present invention;

[0031] Figure 3 This is an enthalpy-humidity diagram for another working mode of the present invention.

[0032] The attached diagrams are labeled as follows: 1. Rotor body; 101. Area A; 102. Area B; 103. Area C; 104. Area D; 2. Regeneration air inlet channel; 3. Primary regeneration exhaust channel; 4. Secondary regeneration exhaust channel; 5. Dehumidification air inlet channel; 6. Dehumidification exhaust channel; 7. Air heat exchanger one; 8. Condenser one; 9. Compressor one; 10. Throttling valve one; 11. Air valve one; 12. Air valve two; 13. Evaporator one; 14. Air valve three; 15. Air valve four; 16. Evaporator two; 17. Condenser two; 18. Compressor two; 19. Throttling valve two; 20. Air valve five; 21. Air valve six; 22. Air heat exchanger two; 23. Connecting channel one; 24. Connecting channel two. Detailed Implementation

[0033] The present invention will now be described in more detail with reference to the embodiments.

[0034] Example 1

[0035] like Figure 1As shown, the multi-channel rotary dehumidification system with heat recovery device in this embodiment includes a rotary body 1, a dehumidification unit, a regeneration unit, a heat pump unit one, and a heat pump unit two. The rotary body 1 includes regions A101, B102, C103, and D104 arranged clockwise. The dehumidification unit is connected to regions A101 and B102 respectively and is used to convert the input humid air into dry air and then discharge it. The regeneration unit is connected to regions C103 and D104 respectively and is used to restore the moisture absorption function of the rotary body 1. The heat pump unit one is connected to the rear end of region C103 and the rear end of region B102 respectively, and the heat pump unit two is connected to the front end of region D104 and the front end of region A101 respectively.

[0036] Furthermore, the regeneration unit includes a regeneration air inlet channel 2 and a primary regeneration air outlet channel 3. One end of the regeneration air inlet channel 2 runs from front to back through region D104 and connects to one end of the primary regeneration air outlet channel 3. The free end of the primary regeneration air outlet channel 3 runs from back to front through region C103. An air heat exchanger 7 is also provided between the regeneration air inlet channel 2 and the primary regeneration air outlet channel 3 at the front end of the rotor body 1.

[0037] Furthermore, the dehumidification unit includes a dehumidification air inlet channel 5 and a dehumidification air outlet channel 6. One end of the dehumidification air inlet channel 5 runs from front to back through area A101 and is connected to one end of the dehumidification air outlet channel 6. The free end of the dehumidification air outlet channel 6 runs from back to front through area B102. A connecting channel 23 is also connected between the dehumidification air inlet channel 5 and the dehumidification air outlet channel 6 located at the front end of the rotor body 1.

[0038] Furthermore, a secondary regeneration exhaust duct 4 is connected to the primary regeneration exhaust duct 3 at the front end of the air heat exchanger 7, and an air heat exchanger 22 is installed between the secondary regeneration exhaust duct 4 and the dehumidification exhaust duct 6.

[0039] Furthermore, the heat pump unit includes a condenser 8, a compressor 9, an evaporator 13, and a throttle valve 10 connected in sequence to form a circulation loop. The condenser 8 is located on the primary regeneration exhaust duct 3 at the rear end of zone C103, and the evaporator 13 is located on the dehumidification exhaust duct 6 at the rear end of zone B102.

[0040] Furthermore, the second heat pump unit includes a second condenser 17, a second compressor 18, a second evaporator 16, and a second throttle valve 19 connected in sequence to form a circulation loop. The second condenser 17 is located on the regeneration air inlet channel 2 at the front end of region D104 and is located at the rear end of the first air heat exchanger 7. The second evaporator 16 is located on the dehumidification air inlet channel 5 at the front end of region A101 and is located at the front end of the first connecting channel 23.

[0041] Furthermore, a connecting channel 24 connects the regeneration air inlet channel 2 and the dehumidification air inlet channel 5 located at the front end of the rotor body 1.

[0042] In this embodiment, a second air valve 12 is provided on the second connecting channel 24, and a first air valve 11 is provided between the input end of the second connecting channel 24 and the first evaporator 13.

[0043] A third air valve 14 is installed on the connecting channel 1 23, and a fourth air valve 15 is installed between the input end of the connecting channel 1 23 and the front end of area A101.

[0044] A damper 20 is installed on the secondary regeneration exhaust duct 4, and a damper 21 is installed on the primary regeneration exhaust duct 3 downstream of the input end of the secondary regeneration exhaust duct 4.

[0045] Example 2

[0046] like Figure 1 As shown, the working method of the multi-channel rotary dehumidifier system with heat recovery device in Embodiment 1 above specifically includes the following process:

[0047] Operating mode 1: When the system starts working, humid air enters through the dehumidification air inlet channel 5 and passes through the evaporator 2 16 for one cooling and dehumidification to obtain one dry air. Then, the automatic control system judges whether the one dry air output by the evaporator 2 16 meets the requirements. If it does, the one dry air enters the connection channel 1 23 and is discharged outward from the outlet end of the dehumidification exhaust channel 6.

[0048] If the primary dry air output from evaporator 16 does not meet the requirements, then connection channel 23 is closed. The primary dry air passes through area A101 for rotary dehumidification, then enters evaporator 13 for secondary cooling and dehumidification, and then enters dehumidification exhaust channel 6. The primary dry air in dehumidification exhaust channel 6 finally undergoes isenthalpic dehumidification in area B102 to obtain secondary dry air, and then is discharged outward from the outlet end of dehumidification exhaust channel 6.

[0049] The enthalpy-humidity diagram for working mode one is as follows: Figure 2 As shown, black dots 2 / 6 / 7 represent the required air temperature and humidity.

[0050] Furthermore, it also includes the following processes:

[0051] Operating mode 2: When the system starts working and the automatic control system determines that the primary dry air output by evaporator 2 16 does not meet the requirements, fresh air enters through regeneration air inlet channel 2 and passes through air heat exchanger 1 7 and condenser 2 17 in sequence to obtain high-temperature air. The high-temperature air continues to pass through zone D104 and carries away the moisture adsorbed by the rotor body 1, resulting in low-temperature and humid air. Then, the low-temperature and humid air enters the primary regeneration exhaust channel 3 and continues to pass through condenser 1 8, where it is heated again and enters zone C103 to continue carrying away the moisture adsorbed by the rotor body 1. Finally, it is discharged through the outlet end of the primary regeneration exhaust channel 3.

[0052] The enthalpy-humidity diagram for working mode two is as follows: Figure 3 As shown, black dot 7 represents the required air temperature and humidity.

[0053] Furthermore, the air passing through region C103 from back to front enters the secondary regeneration exhaust duct 4 and passes through the air heat exchanger 22 before being discharged through the secondary regeneration exhaust duct 4.

[0054] Working principle of the invention:

[0055] When the system starts working, humid air enters through the dehumidification air inlet channel 5 and passes through the evaporator 2 16 for a first cooling and dehumidification to obtain primary dry air. Then, the automatic control system judges whether the primary dry air output by the evaporator 2 16 meets the temperature and humidity requirements. If it does, the primary dry air enters the connection channel 1 23 and is discharged outward from the outlet end of the dehumidification exhaust channel 6.

[0056] If the primary dry air output from evaporator 16 does not meet the requirements, then connection channel 23 is closed. The primary dry air passes through area A101 for rotary dehumidification, then enters evaporator 13 for secondary cooling and dehumidification, and then enters dehumidification exhaust channel 6. The primary dry air in dehumidification exhaust channel 6 finally undergoes isenthalpic dehumidification in area B102 to obtain secondary dry air, and then is discharged outward from the outlet end of dehumidification exhaust channel 6.

[0057] The process also includes the following steps: when the system starts working and the automatic control system determines that the primary dry air output by evaporator 16 does not meet the requirements, fresh air enters through regeneration air inlet channel 2 and passes through air heat exchanger 7 and condenser 17 in sequence to obtain high-temperature air. The high-temperature air continues to pass through area D104 and carries away the moisture adsorbed by the rotor body 1 to obtain low-temperature and humid air. Then, the low-temperature and humid air enters the primary regeneration exhaust channel 3 and continues to pass through condenser 8 to be heated again and enters area C103 to continue to carry away the moisture adsorbed by the rotor body 1. Finally, it is discharged through the outlet end of the primary regeneration exhaust channel 3.

[0058] The air passing through area C103 from back to front enters the secondary regeneration exhaust duct 4 and passes through the air heat exchanger 22 before being discharged through the secondary regeneration exhaust duct 4.

[0059] Among them, the setting of connecting channel 24 can reduce the humidity of the regeneration air and improve the regeneration capacity when the outdoor air is humid. This is because the air humidity in the regeneration air intake channel 2 is high. A portion of the dried air can be sacrificed and introduced into the regeneration air intake channel 2, thereby reducing the humidity of the regeneration air and improving the regeneration capacity.

[0060] In the description of this invention, it should be noted that the terms "inner", "outer", "upper", 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 invention 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 limiting this invention.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A multi-channel rotary dehumidification system with a heat recovery device, characterized in that: The device includes a rotor body, a dehumidification unit, a regeneration unit, a heat pump unit one, and a heat pump unit two. The rotor body includes regions A, B, C, and D arranged clockwise. The dehumidification unit is connected to regions A and B respectively and is used to convert the input humid air into dry air before discharging it. The regeneration unit is connected to regions C and D respectively and is used to restore the moisture absorption function of the rotor body. The heat pump unit one is connected to the rear end of region C and the rear end of region B respectively, and the heat pump unit two is connected to the front end of region D and the front end of region A respectively. The regeneration unit includes a regeneration air inlet channel and a primary regeneration air outlet channel. One end of the regeneration air inlet channel runs from front to back through region D and connects to one end of the primary regeneration air outlet channel. The free end of the primary regeneration air outlet channel runs from back to front through region C. An air heat exchanger is also provided between the regeneration air inlet channel and the primary regeneration air outlet channel located at the front end of the rotor body. The dehumidification unit includes a dehumidification air inlet channel and a dehumidification air outlet channel. One end of the dehumidification air inlet channel runs from front to back through area A and connects to one end of the dehumidification air outlet channel. The free end of the dehumidification air outlet channel runs from back to front through area B. A connecting channel 1 is also connected between the dehumidification air inlet channel and the dehumidification air outlet channel located at the front end of the rotor body. The heat pump unit includes a condenser, a compressor, an evaporator, and a throttling valve connected in sequence to form a circulation loop. The condenser is located on the primary regeneration exhaust duct at the rear end of zone C, and the evaporator is located on the dehumidification exhaust duct at the rear end of zone B. The second heat pump unit includes a second condenser, a second compressor, a second evaporator, and a second throttling valve connected in sequence to form a circulation loop. The second condenser is located on the regeneration air inlet channel at the front end of area D and is located at the rear end of the first air heat exchanger. The second evaporator is located on the dehumidification air inlet channel at the front end of area A and is located at the front end of the first connecting channel.

2. The multi-channel rotary dehumidification system with heat recovery device according to claim 1, characterized in that: A secondary regeneration exhaust duct is also connected to the primary regeneration exhaust duct at the front end of the air heat exchanger, and an air heat exchanger is installed between the secondary regeneration exhaust duct and the dehumidification exhaust duct.

3. The multi-channel rotary dehumidification system with heat recovery device according to claim 2, characterized in that: A second connecting channel is provided between the regeneration air inlet channel and the dehumidification air inlet channel located at the front end of the rotor body.

4. The operating method of the multi-channel rotary dehumidification system with heat recovery device according to any one of claims 1-3: specifically including the following process: When the system starts working, humid air enters through the dehumidification air inlet channel and undergoes a cooling and dehumidification process through evaporator two to obtain dry air. Then, the automatic control system determines whether the dry air output by evaporator two meets the requirements. If it does, the dry air enters the connection channel one and is discharged outward from the dehumidification exhaust channel outlet. If the primary dry air output from evaporator 2 does not meet the requirements, then connection channel 1 is closed. The primary dry air passes through zone A for rotary dehumidification, then enters evaporator 1 for secondary cooling and dehumidification, and then enters the dehumidification exhaust channel. The primary dry air in the dehumidification exhaust channel finally undergoes isenthalpic dehumidification in zone B to obtain secondary dry air, and then is discharged outward from the outlet end of the dehumidification exhaust channel.

5. The operating method of the multi-channel rotary dehumidification system with heat recovery device according to claim 4, characterized in that: It also includes the following processes: When the system starts working and the automatic control system determines that the primary dry air output from evaporator 2 does not meet the requirements, fresh air enters through the regeneration air inlet channel and passes through air heat exchanger 1 and condenser 2 in sequence to obtain high-temperature air. The high-temperature air continues to pass through zone D and carries away the moisture adsorbed by the rotor body, resulting in low-temperature and humid air. Then, the low-temperature and humid air enters the primary regeneration exhaust channel and continues to pass through condenser 1, where it is heated again and enters zone C to continue carrying away the moisture adsorbed by the rotor body. Finally, it is discharged through the outlet end of the primary regeneration exhaust channel.

6. The operating method of the multi-channel rotary dehumidification system with heat recovery device according to claim 5, characterized in that: The air passing through area C from back to front enters the secondary regeneration exhaust duct and is discharged through the secondary regeneration exhaust duct after passing through the second air heat exchanger.

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