Fresh air dehumidification equipment

Abstract

The invention provides fresh air dehumidification equipment. The fresh air dehumidification equipment comprises a dehumidification assembly which comprises a first cooling device and a solution dehumidification assembly; the rotating wheel is provided with a dehumidification area and a regeneration area; the regeneration assembly comprises a condenser, a solution regeneration device and a first evaporator, and the regeneration area is located between the condenser and the solution regeneration device; the heat exchange system comprises a second evaporator, a heating device and a second cooling device, and the heat exchange system has a first heat exchange state in which the heating device and the second evaporator are located on the first heat exchange flow path and a second heat exchange state in which the heating device and the second cooling device are located on the second heat exchange flow path; when the temperature of the fresh air is greater than or equal to a preset temperature value, the heat exchange system is in a first heat exchange state; and when the fresh air temperature is smaller than the preset temperature value, the heat exchange system is in a second heat exchange state. The problems that in the prior art, a rotating wheel dehumidification mode is low in energy efficiency, limited in operation range and too high in energy consumption under specific conditions are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep dehumidification, and in particular to a fresh air dehumidification device. Background Art

[0002] Dehumidification technology plays a vital role in both industrial and residential applications, especially in environments with strict air quality requirements. Deep dehumidification technology involves reducing air humidity to a level lower than that achieved by conventional air conditioning systems to meet specific application requirements.

[0003] At present, rotary dehumidification is a mainstream deep dehumidification method. The rotary wheel is generally divided into a dehumidification zone and a regeneration zone. The core is to use hygroscopic solid materials to adsorb moisture in the air in the dehumidification zone of the rotary wheel to achieve approximately isenthalpic dehumidification, and then desorb the moisture by heating the air in the regeneration zone. Although this process is effective, it also has significant limitations, including the need for a high-temperature heat source (usually steam or electricity) for rotary wheel regeneration, and the dehumidification efficiency is easily reduced due to insufficient heat source under low temperature conditions.

[0004] Solution dehumidification is another deep dehumidification method, which uses the moisture absorption and release characteristics of certain salt solutions to absorb moisture in the air through direct contact between the solution and the air to achieve the dehumidification effect. Compared with rotary dehumidification, solution dehumidification technology can use heat pumps to cool, dehumidify and regenerate solutions, with higher energy efficiency, but its dehumidification depth is relatively limited, mainly determined by the concentration of the salt solution and the specific surface area of ​​the heat and mass transfer unit, which makes the depth of solution dehumidification between refrigeration dehumidification and rotary dehumidification.

[0005] In the rotary dehumidification in the prior art, the dehumidification effect and regeneration process are usually enhanced by adding a heat pump system. The pre-cooled air needs to be cooled and dehumidified by the direct expansion evaporation side of the heat pump system before entering the rotary wheel, which reduces the dehumidification burden of the rotary wheel; and the direct expansion condenser is used as a heat source for the regenerated air to heat the air in the regeneration area of ​​the rotary wheel to desorb moisture. However, this configuration poses a challenge to the operation of the compressor, requiring the compressor to operate under conditions of extremely low evaporation temperature and extremely high condensation temperature, and requiring the compressor to have a large compression ratio, which easily leads to low efficiency of the heat pump and easily exceeds the normal operating range. In particular, in order to prevent frost on the direct expansion evaporation side under low temperature conditions, the evaporation temperature is usually limited to 0°C or above, which further limits the dehumidification capacity.

[0006] In some process occasions with high humidity requirements, corrosion to the rotor and no return air allowed, the use of fresh air rotor dehumidifier becomes the only option, and both dehumidified air and regeneration air come from fresh air. In this case, the above heat pump system shows the disadvantage of poor adaptability to working conditions in the year-round operation, especially in winter, low-temperature fresh air will not only cause the direct expansion evaporator to frost easily, reducing the dehumidification capacity, but also increase the dehumidification load of the rotor and increase the regeneration temperature demand, which is difficult to meet with the heat provided by the direct expansion condenser alone, thereby increasing the demand for auxiliary heat sources and significantly improving the overall energy consumption of the heat pump system.

[0007] In summary, the rotary dehumidification method in the prior art has the problems of low energy efficiency, limited operating range and excessive energy consumption under certain conditions. Summary of the invention

[0008] The main purpose of the present invention is to provide a fresh air dehumidification device to solve the problems of low energy efficiency, limited operating range and excessive energy consumption in the rotary dehumidification method in the prior art under specific conditions.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a fresh air dehumidification equipment, including: a dehumidification component, including a first cooling device, a solution dehumidification component and a first fan arranged in sequence, the first cooling device is used to cool the fresh air, and the solution dehumidification component is used to dehumidify the fresh air; a rotor, having a dehumidification zone and a regeneration zone, the dehumidification zone is located between the solution dehumidification component and the first fan; a regeneration component, including a condenser, a solution regeneration device, a first evaporator and a second fan arranged in sequence, the condenser is connected to the first evaporator through a connecting pipeline, the regeneration zone is located between the condenser and the solution regeneration device, and the solution regeneration device is connected to the solution dehumidification component; the condenser is used to heat the airflow to form a hot airflow, and the hot airflow passes through the regeneration zone And it is in contact with the solution in the solution regeneration device; the heat exchange system includes a second evaporator, a heating device and a second cooling device, the heat exchange system has a first heat exchange state in which the heating device and the second evaporator are located on the first heat exchange flow path, and a second heat exchange state in which the heating device and the second cooling device are located on the second heat exchange flow path; the heating device is used to heat the solution in the solution regeneration device, and the second cooling device is used to cool the circulating solution in at least part of the solution dehumidification component; the second fan is located on the side of the second evaporator away from the solution regeneration device; wherein, when the temperature of the fresh air is greater than or equal to the preset temperature value, the heat exchange system is in the first heat exchange state; when the temperature of the fresh air is less than the preset temperature value, the heat exchange system is in the second heat exchange state.

[0010] Furthermore, the dehumidification component also includes a third cooling device, and the solution dehumidification component includes: a first solution dehumidifier, and the third cooling device is used to cool the circulating solution in the first solution dehumidifier; a second solution dehumidifier, and the second cooling device is used to cool the circulating solution in the second solution dehumidifier; wherein, the first solution dehumidifier and the second solution dehumidifier can be put into use selectively, and when the temperature of the fresh air is greater than or equal to the preset temperature value, the first solution dehumidifier is put into use; when the temperature of the fresh air is less than the preset temperature value, the second solution dehumidifier is put into use.

[0011] Furthermore, the regeneration component also includes a first compressor and a first throttle valve arranged on the connecting pipeline; the fresh air dehumidification equipment also includes: a second compressor; a first main pipeline, the second compressor and the heating device are both arranged on the first main pipeline; a first branch pipeline, the two ends of the first branch pipeline are respectively connected to the first end of the first main pipeline and the liquid inlet of the second evaporator; a second branch pipeline, the two ends of the second branch pipeline are respectively connected to the second end of the first main pipeline and the liquid outlet of the second evaporator; a third branch pipeline, the third branch pipeline passes through the second cooling device, and the two ends of the third branch pipeline are respectively connected to the first end and the second end of the first main pipeline; a second throttle valve is arranged on the first main pipeline.

[0012] Furthermore, the fresh air dehumidification equipment also includes: a first control valve, which is arranged on the first branch pipeline to control the on-off state of the first branch pipeline; and / or, a second control valve, which is arranged on the third branch pipeline to control the on-off state of the third branch pipeline; and / or, a first one-way valve, which is arranged on the second branch pipeline, and the conduction direction of the first one-way valve is from the liquid outlet of the second evaporator to the second end of the first main pipeline; and / or, a second one-way valve, which is arranged on the third branch pipeline, and the conduction direction of the second one-way valve is from the first end to the second end of the first main pipeline.

[0013] Furthermore, the fresh air dehumidification equipment also includes: a second main pipeline, a first end of the second main pipeline is connected to the drain port of the solution regeneration device; a fourth branch pipeline, two ends of the fourth branch pipeline are respectively connected to the second end of the second main pipeline and the liquid replenishment port of the first solution dehumidifier; a fifth branch pipeline, two ends of the fifth branch pipeline are respectively connected to the second end of the second main pipeline and the liquid replenishment port of the second solution dehumidifier.

[0014] Furthermore, the fresh air dehumidification equipment also includes: a third main pipeline, a first end of the third main pipeline is connected to the return liquid port of the solution regeneration device; a sixth branch pipeline, two ends of the sixth branch pipeline are respectively connected to the second end of the third main pipeline and the liquid outlet of the first solution dehumidifier; a seventh branch pipeline, two ends of the seventh branch pipeline are respectively connected to the second end of the third main pipeline and the liquid outlet of the second solution dehumidifier; and / or, a heat recovery device is arranged on the second main pipeline and the third main pipeline.

[0015] Furthermore, the fresh air dehumidification equipment also includes: a fourth main pipeline, the two ends of the fourth main pipeline are respectively connected to the liquid inlet and the liquid outlet of the first solution dehumidifier, and the sixth branch pipeline is connected to the middle part of the fourth main pipeline; a first pump body is arranged on the fourth main pipeline; wherein the third cooling device is arranged on the fourth main pipeline.

[0016] Furthermore, the fresh air dehumidification equipment also includes: a fifth main pipeline, the two ends of the fifth main pipeline are respectively connected to the liquid inlet and the liquid outlet of the second solution dehumidifier, and the seventh branch pipeline is connected to the middle part of the fifth main pipeline; a second pump body is arranged on the fifth main pipeline; wherein the fifth main pipeline passes through the second cooling device.

[0017] Furthermore, the fresh air dehumidification equipment also includes: an auxiliary heating device, which is located between the wheel and the condenser to heat the air entering the regeneration zone; and / or a thermostat, which is located between the dehumidification zone and the first fan.

[0018] Furthermore, the fresh air dehumidification equipment also includes: a control module, which is electrically connected to the first pump body, the second pump body, the first control valve and the second control valve; the fresh air dehumidification equipment has a normal mode and a low temperature mode. When the temperature of the fresh air is greater than or equal to the preset temperature value, the control module is used to control the first pump body to start, the first control valve to open, and the second control valve to close, so that the fresh air dehumidification equipment is in the normal mode; when the temperature of the fresh air is lower than the preset temperature value, the control module is used to control the second pump body to start, the first control valve to close, and the second control valve to open.

[0019] According to the technical solution of the present invention, the fresh air dehumidification equipment includes a dehumidification component, a rotor, a regeneration component and a heat exchange system. The dehumidification component includes a first cooling device, a solution dehumidification component and a first fan arranged in sequence. The first cooling device is used to cool the fresh air, and the solution dehumidification component is used to dehumidify the fresh air. The rotor has a dehumidification zone and a regeneration zone, and the dehumidification zone is located between the solution dehumidification component and the first fan. The regeneration component includes a condenser, a solution regeneration device, a first evaporator and a second fan arranged in sequence. The condenser is connected to the first evaporator through a connecting pipeline, the regeneration zone is located between the condenser and the solution regeneration device, and the solution regeneration device is connected to the solution dehumidification component. The condenser is used to heat the airflow to form a hot airflow, and the hot airflow passes through the regeneration zone and contacts with the solution in the solution regeneration device. The heat exchange system includes a second evaporator, a heating device and a second cooling device. The heat exchange system has a first heat exchange state in which the heating device and the second evaporator are located on the first heat exchange flow path, and a second heat exchange state in which the heating device and the second cooling device are located on the second heat exchange flow path; the heating device is used to heat the solution in the solution regeneration device, and the second cooling device is used to cool the circulating solution in at least part of the solution dehumidification component. In this way, during the operation of the fresh air dehumidification equipment, part of the fresh air is processed by the first cooling device, the solution dehumidification component, and the dehumidification zone in turn to form dry air supply, and part of the fresh air is heated by the condenser and passes through the regeneration zone and the solution regeneration device in turn to achieve the regeneration of the rotor and the solution. The heat of the rotor regeneration comes from the heat exchange system and the condenser, and the heat of the regenerated solution and the cold of the dehumidified solution are obtained according to the fresh air temperature. Specifically, when the temperature of the fresh air is greater than or equal to the preset temperature value, the heat exchange system is in a first heat exchange state, the first heat exchange flow path is put into use, and the heat of the regeneration solution comes from the first heat exchange flow path; when the temperature of the fresh air is less than the preset temperature value, the heat exchange system is in a second heat exchange state, the second heat exchange flow path is put into use, and the heat of the regeneration solution comes from the second heat exchange flow path, and the cold of the dehumidification solution comes from the second cooling device, so as to reduce the dehumidification load of the rotor through the composite solution dehumidification technology, thereby reducing the regeneration temperature of the rotor, and making full use of the heat in the regeneration solution to achieve rotor regeneration. Since a solution dehumidification method is used instead of a direct expansion evaporator for dehumidification, there is no problem of evaporator frosting, thereby avoiding the evaporator from frosting. It is suitable for fresh air operation conditions throughout the year, has low regeneration energy consumption, and high system efficiency, thereby solving the problems of low energy efficiency, limited operating range and excessive energy consumption of the rotor dehumidification method in the prior art under specific conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1A structural schematic diagram of an embodiment of a fresh air dehumidification device according to the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 1. A first cooling device; 2. A first solution dehumidifier; 3. A second solution dehumidifier;

[0024] 4. Rotor; 41. Dehumidification zone; 42. Regeneration zone;

[0025] 5. Thermostat; 6. First fan;

[0026] 7. Condenser; 8. First evaporator; 9. Auxiliary heating device; 10. Solution regeneration device;

[0027] 11. Second evaporator; 12. Second fan; 13. Third cooling device; 14. Heat recovery device;

[0028] 151, a first compressor; 152, a second compressor;

[0029] 16. Heating device;

[0030] 171, first throttle valve; 172, second throttle valve;

[0031] 181. a first control valve; 182. a second control valve;

[0032] 191. a first one-way valve; 192. a second one-way valve;

[0033] 20. Second cooling device; 211. First pump body; 212. Second pump body; 213. Third pump body;

[0034] 221, first dilute solution valve; 222, second dilute solution valve; 223, first concentrated solution valve; 224, second concentrated solution valve;

[0035] 23. Primary filter; 24. Regeneration filter; 25. Connecting pipeline; 26. First main pipeline; 27. First branch pipeline; 28. Second branch pipeline; 29. ​​Third branch pipeline; 30. Second main pipeline; 31. Fourth branch pipeline; 32. Fifth branch pipeline; 33. Third main pipeline; 34. Sixth branch pipeline; 35. Seventh branch pipeline; 36. Fourth main pipeline; 37. Fifth main pipeline. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] In order to solve the problems of low energy efficiency, limited operating range and excessive energy consumption in the rotary dehumidification method in the prior art under specific conditions, the present application provides a fresh air dehumidification device.

[0038] like Figure 1 As shown, the fresh air dehumidification equipment includes a dehumidification component, a rotor 4, a regeneration component and a heat exchange system. The dehumidification component includes a first cooling device 1, a solution dehumidification component and a first fan 6 arranged in sequence. The first cooling device 1 is used to cool the fresh air, and the solution dehumidification component is used to dehumidify the fresh air. The rotor 4 has a dehumidification zone 41 and a regeneration zone 42, and the dehumidification zone 41 is located between the solution dehumidification component and the first fan 6. The regeneration component includes a condenser 7, a solution regeneration device 10, a first evaporator 8 and a second fan 12 arranged in sequence, the condenser 7 is connected to the first evaporator 8 through a connecting pipe 25, the regeneration zone 42 is located between the condenser 7 and the solution regeneration device 10, and the solution regeneration device 10 is connected to the solution dehumidification component; the condenser 7 is used to heat the airflow to form a hot airflow, and the hot airflow passes through the regeneration zone 42 and contacts with the solution in the solution regeneration device 10. The heat exchange system includes a second evaporator 11, a heating device 16 and a second cooling device 20. The heat exchange system has a first heat exchange state in which the heating device 16 and the second evaporator 11 are located on a first heat exchange flow path, and a second heat exchange state in which the heating device 16 and the second cooling device 20 are located on a second heat exchange flow path. The heating device 16 is used to heat the solution in the solution regeneration device 10, and the second cooling device 20 is used to cool the circulating solution in at least part of the solution dehumidification component. The second fan 12 is located on the side of the second evaporator 11 away from the solution regeneration device 10. When the temperature of the fresh air is greater than or equal to the preset temperature value, the heat exchange system is in the first heat exchange state; when the temperature of the fresh air is less than the preset temperature value, the heat exchange system is in the second heat exchange state.

[0039] By applying the technical solution of this embodiment, during the operation of the fresh air dehumidification device, part of the fresh air is processed by the first cooling device 1, the solution dehumidification component, and the dehumidification zone 41 in sequence to form dry air supply, and part of the fresh air is heated by the condenser 7 and passes through the regeneration zone 42 and the solution regeneration device 10 in sequence to achieve the regeneration of the rotor 4 and the solution. The heat of the rotor regeneration comes from the heat exchange system and the condenser 7, and the heat of the regenerated solution and the cold of the dehumidified solution are obtained according to the fresh air temperature. Specifically, when the temperature of the fresh air is greater than or equal to the preset temperature value, the heat exchange system is in the first heat exchange state, the first heat exchange flow path is put into use, and the heat of the regenerated solution comes from the first heat exchange flow path; when the temperature of the fresh air is less than the preset temperature value, the heat exchange system is in the second heat exchange state, the second heat exchange flow path is put into use, and the heat of the regenerated solution comes from the second heat exchange flow path, and the cold of the dehumidification solution comes from the second cooling device, so as to reduce the dehumidification load of the wheel 4 through the composite solution dehumidification technology, thereby reducing the regeneration temperature of the wheel 4, and making full use of the heat in the regeneration solution to achieve wheel regeneration. Since the solution dehumidification method is used instead of the direct expansion evaporator for dehumidification, there is no problem of evaporator frosting, thereby avoiding the evaporator from frosting. It is suitable for fresh air operation conditions throughout the year, with low regeneration energy consumption and high system efficiency, thereby solving the problems of low energy efficiency, limited operating range and excessive energy consumption of the wheel dehumidification method in the prior art under specific conditions.

[0040] In this embodiment, the first cooling device 1 is a precooler, which is used for preliminary cooling and dehumidification of fresh air.

[0041] In this embodiment, the solution regeneration device 10 is used to concentrate the solution and provide a concentrated solution to the solution dehumidification component to maintain the dehumidification capacity.

[0042] In this embodiment, the dehumidification zone 41 is used to perform final dehumidification treatment on the air after the solution is dehumidified, and the regeneration zone 42 is used to desorb and absorb moisture.

[0043] In this embodiment, the condenser 7 is a direct expansion condenser. The first evaporator 8 is a direct expansion evaporator, which is used to cool the air after the solution is regenerated.

[0044] like Figure 1As shown, the dehumidification component also includes a third cooling device 13, and the solution dehumidification component includes a first solution dehumidifier 2 and a second solution dehumidifier 3. The third cooling device 13 is used to cool the circulating solution in the first solution dehumidifier 2, and the second cooling device 20 is used to cool the circulating solution in the second solution dehumidifier 3. The first solution dehumidifier 2 and the second solution dehumidifier 3 can be put into use selectively. When the temperature of the fresh air is greater than or equal to the preset temperature value, the first solution dehumidifier 2 is put into use; when the temperature of the fresh air is less than the preset temperature value, the second solution dehumidifier 3 is put into use. In this way, the above-mentioned setting enables the fresh air dehumidification equipment to adapt to a wider range of temperature changes, ensuring that a good dehumidification effect can be maintained even in a low temperature environment.

[0045] Specifically, the third cooling device 13 is used to cool the dehumidification solution by low-temperature cold water. In cold climate conditions, by automatically switching to the second solution dehumidifier 3, since the freezing point of the solution is much lower than that of water, there is no risk of freezing during operation, ensuring trouble-free operation of the fresh air dehumidification equipment throughout the year.

[0046] like Figure 1 As shown, the regeneration component also includes a first compressor 151 and a first throttle valve 171 arranged on the connecting pipeline 25; the fresh air dehumidification equipment also includes a second compressor 152, a first main pipeline 26, a first branch pipeline 27, a second branch pipeline 28 and a third branch pipeline 29. Among them, the second compressor 152 and the heating device 16 are both arranged on the first main pipeline 26. The two ends of the first branch pipeline 27 are respectively connected to the first end of the first main pipeline 26 and the liquid inlet of the second evaporator 11. The two ends of the second branch pipeline 28 are respectively connected to the second end of the first main pipeline 26 and the liquid outlet of the second evaporator 11. The third branch pipeline 29 passes through the second cooling device 20, and the two ends of the third branch pipeline 29 are respectively connected to the first end and the second end of the first main pipeline 26. In this way, by adding the first compressor 151 and the first throttle valve 171, the fresh air dehumidification equipment can more effectively control the temperature and pressure in the solution regeneration process, thereby improving the regeneration efficiency. At the same time, the above settings improve the flow smoothness of the medium in the heat exchange system to ensure the normal operation of the fresh air dehumidification equipment.

[0047] Optionally, the fresh air dehumidification device further includes a first control valve 181, which is arranged on the first branch pipeline 27 to control the on-off state of the first branch pipeline 27; and / or, the fresh air dehumidification device further includes a second control valve 182, which is arranged on the third branch pipeline 29 to control the on-off state of the third branch pipeline 29; and / or, the fresh air dehumidification device further includes a first check valve 191, which is arranged on the second branch pipeline 28, and the conduction direction of the first check valve 191 is from the liquid outlet of the second evaporator 11 to the second end of the first main pipeline 26. In this way, through the arrangement of the first control valve 181, the second control valve 182 and the first check valve 191, the fresh air dehumidification device can accurately adjust the direction of the refrigerant and realize accurate control of the heating and cooling process.

[0048] In this embodiment, the fresh air dehumidification equipment also includes a first control valve 181, a second control valve 182 and a first non-return valve 191. The first control valve 181 is arranged on the first branch pipeline 27 to control the on-off state of the first branch pipeline 27. The second control valve 182 is arranged on the third branch pipeline 29 to control the on-off state of the third branch pipeline 29. The first non-return valve 191 is arranged on the second branch pipeline 28, and the conduction direction of the first non-return valve 191 is from the liquid outlet of the second evaporator 11 to the second end of the first main pipeline 26. In this way, the above-mentioned setting, on the one hand, improves the intelligence level of the fresh air dehumidification equipment to realize automatic control; on the other hand, when the heat exchange system is in the first heat exchange state or the second heat exchange state, the above-mentioned setting of the first non-return valve 191 can prevent the refrigerant from being back-charged into another heat exchange flow path.

[0049] Optionally, the first control valve 181 is a solenoid valve.

[0050] Optionally, the second control valve 182 is a solenoid valve.

[0051] like Figure 1 As shown, the fresh air dehumidification equipment also includes a second one-way valve 192, which is arranged on the third branch pipeline 29. The conduction direction of the second one-way valve 192 is from the first end to the second end of the first main pipeline 26 to prevent backflow in the first main pipeline 26.

[0052] like Figure 1As shown, the fresh air dehumidification equipment also includes a second main pipeline 30, a fourth branch pipeline 31 and a fifth branch pipeline 32. Among them, the first end of the second main pipeline 30 is connected to the drain port of the solution regeneration device 10. The two ends of the fourth branch pipeline 31 are respectively connected to the second end of the second main pipeline 30 and the liquid replenishment port of the first solution dehumidifier 2. The two ends of the fifth branch pipeline 32 are respectively connected to the second end of the second main pipeline 30 and the liquid replenishment port of the second solution dehumidifier 3. In this way, the above improves the flow smoothness of the solution in the fresh air dehumidification equipment to ensure that the solution regeneration device 10 can replenish liquid to the first solution dehumidifier 2 and the second solution dehumidifier 3, so as to ensure that the first solution dehumidifier 2 and the second solution dehumidifier 3 can dehumidify the fresh air.

[0053] Optionally, the fresh air dehumidification device further includes a heat recovery device 14, which is arranged on the second main pipeline 30 and the third main pipeline 33. In this way, the heat recovery device 14 is used to recover the heat between the dilute solution and the concentrated solution exchanged by dehumidification and regeneration, thereby reducing mixing losses.

[0054] like Figure 1 As shown, the fresh air dehumidification equipment also includes a third main pipeline 33, a sixth branch pipeline 34 and a seventh branch pipeline 35. Among them, the first end of the third main pipeline 33 is connected to the liquid return port of the solution regeneration device 10. The two ends of the sixth branch pipeline 34 are respectively connected to the second end of the third main pipeline 33 and the liquid outlet of the first solution dehumidifier 2. The two ends of the seventh branch pipeline 35 are respectively connected to the second end of the third main pipeline 33 and the liquid outlet of the second solution dehumidifier 3. In this way, the above-mentioned arrangement improves the flow smoothness of the solution between the first solution dehumidifier 2, the second solution dehumidifier 3 and the solution regeneration device 10, so as to ensure that the solution regeneration device 10 can regenerate the dehumidification solution.

[0055] In this embodiment, the heat recovery device 14 is used to recover heat when the dehumidified dilute solution and the regenerated concentrated solution are exchanged.

[0056] like Figure 1 As shown, the fresh air dehumidification device further includes a first dilute solution valve 221, a second dilute solution valve 222, a first concentrated solution valve 223 and a second concentrated solution valve 224. The first dilute solution valve 221 is arranged on the sixth branch pipeline 34, the second dilute solution valve 222 is arranged on the seventh branch pipeline 35, the first concentrated solution valve 223 is arranged on the fourth branch pipeline 31, and the second concentrated solution valve 224 is arranged on the fifth branch pipeline 32. In this way, the above solution valves are used for flow path switching of interstage flow solutions.

[0057] like Figure 1 As shown, the fresh air dehumidification device further includes a first throttle valve 171 and a second throttle valve 172. The first throttle valve 171 is arranged on the connecting pipeline 25, and the second throttle valve 172 is arranged on the first main pipeline 26.

[0058] like Figure 1 As shown, the fresh air dehumidification equipment also includes a fourth main pipeline 36, the two ends of the fourth main pipeline 36 are respectively connected to the liquid inlet and the liquid outlet of the first solution dehumidifier 2, and the sixth branch pipeline 34 is connected to the middle of the fourth main pipeline 36. The first pump body 211 is arranged on the fourth main pipeline 36. Among them, the third cooling device 13 is arranged on the fourth main pipeline 36. In this way, through the above-mentioned arrangement of the first pump body 211, the smooth circulation of the solution is guaranteed, and the stable operation and efficient dehumidification of the fresh air dehumidification equipment under high air volume conditions are ensured. At the same time, the above-mentioned arrangement improves the flow smoothness of the solution in the first solution dehumidifier 2.

[0059] It should be noted that the middle portion of the fourth main pipeline 36 refers to a position on the fourth main pipeline 36 that is located after the first pump body 211 and before the third cooling device 13 .

[0060] like Figure 1 As shown, the fresh air dehumidification equipment also includes a fifth main pipeline 37 and a second pump body 212, the two ends of the fifth main pipeline 37 are respectively connected to the liquid inlet and the liquid outlet of the second solution dehumidifier 3, and the seventh branch pipeline 35 is connected to the middle of the fifth main pipeline 37. The second pump body 212 is arranged on the fifth main pipeline 37. Among them, the fifth main pipeline 37 passes through the second cooling device 20. In this way, through the above-mentioned arrangement of the second pump body 212, the smooth circulation of the solution is guaranteed, and the stable operation and efficient dehumidification of the fresh air dehumidification equipment under high air volume conditions are ensured. At the same time, the above-mentioned arrangement improves the flow smoothness of the solution in the second solution dehumidifier 3.

[0061] It should be noted that the middle portion of the fifth main pipeline 37 refers to a position on the fifth main pipeline 37 that is located after the second pump body 212 and before the second cooling device 20 .

[0062] Optionally, the fresh air dehumidification equipment further includes an auxiliary heating device 9, which is located between the rotor 4 and the condenser 7 to heat the air entering the regeneration zone 42; and / or, the fresh air dehumidification equipment further includes a thermostat 5, which is located between the dehumidification zone 41 and the first fan 6; and / or, the fresh air dehumidification equipment further includes a second fan 12, which is located on the side of the second evaporator 11 away from the solution regeneration device 10. In this way, by adding the auxiliary heating device 9 and the thermostat 5, the fresh air dehumidification equipment can better adapt to complex and changeable environmental conditions. The setting of the second fan 12 can provide air delivery power for the entire regeneration side, from regeneration fresh air to exhaust air, further improving the dehumidification efficiency and stability of the fresh air dehumidification equipment.

[0063] In this embodiment, the fresh air dehumidification device further includes an auxiliary heating device 9, a thermostat 5 and a second fan 12. The auxiliary heating device 9 is located between the rotor 4 and the condenser 7 to heat the air so as to better desorb moisture from the regeneration zone 42. The thermostat 5 is located between the dehumidification zone 41 and the first fan 6, and the second fan 12 is located on the side of the second evaporator 11 away from the solution regeneration device 10.

[0064] Specifically, the thermostat 5 is used to adjust the final air temperature by cold water or hot water.

[0065] In this embodiment, the fresh air dehumidification device also includes a control module, and the control module is electrically connected to the first pump body 211, the second pump body 212, the first control valve 181 and the second control valve 182. The fresh air dehumidification device has a normal mode and a low temperature mode. When the temperature of the fresh air is greater than or equal to the preset temperature value, the control module controls the first pump body 211 to start, the first control valve 181 to open, and the second control valve 182 to close, so that the fresh air dehumidification device is in the normal mode; when the temperature of the fresh air is less than the preset temperature value, the control module controls the second pump body 212 to start, the first control valve 181 to close, and the second control valve 182 to open. In this way, through the integration of the intelligent control module, the automation and intelligent operation of the fresh air dehumidification device is realized, and through the precise control strategy, the efficient and stable operation of the equipment under various environmental conditions is ensured, while reducing the need for manual intervention and improving the overall intelligence level of the system.

[0066] Specifically, when the temperature of the fresh air is greater than or equal to the preset temperature value, the normal mode is started, which is usually used in summer and transition seasons. After being filtered, the fresh air on the dehumidification side is initially cooled and dehumidified by cold water through the first cooling device 1, and then enters the first solution dehumidifier 2 for further cooling and dehumidification through the low-temperature dehumidification solution. At this time, the second solution dehumidifier 3 is not started, the first pump body 211, the first dilute solution valve 221 and the first concentrated solution valve 223 are opened, and the second pump body 212, the second dilute solution valve 222 and the second concentrated solution valve 224 are closed. The air after solution dehumidification is finally dehumidified by the rotor 4. When the humidity reaches the requirement, the thermostat 5 further adjusts the air temperature and sends it into the room. After being filtered, the fresh air on the regeneration side is first heated by the condenser 7 to regenerate the rotor 4. At this time, the air temperature is reduced and the humidity is increased. Then it enters the solution regeneration device 10 to contact with the regeneration solution, the air is heated and humidified, and the solution is concentrated. The regenerated air continues to pass through the first evaporator 8, recovers the heat of the air after the solution is regenerated, and transfers it to the condenser 7. At this time, the evaporation temperature of the fresh air dehumidification equipment is high and the heat pump efficiency is high. Finally, it passes through the second evaporator 11, further recovers the exhaust heat and transfers it to the heating device 16, and finally is discharged through the second fan 12. At this time, the first control valve 181 is opened, the second control valve 182 is closed, and the second cooling device 20 does not participate in heat exchange.

[0067] When the temperature of the fresh air is lower than the preset temperature value, the low temperature mode is activated, which is usually used in winter. Different from the conventional mode, the solution dehumidification is carried out in the second solution dehumidifier 3, the second pump body 212 is started, the second dilute solution valve 222 and the second concentrated solution valve 224 are opened, and the first pump body 211, the first dilute solution valve 221 and the first concentrated solution valve 223 are closed. At this time, the first control valve 181 is closed and the second control valve 182 is opened. The cold capacity of the second cooling device 20 is used to cool the dehumidification solution in the second solution dehumidifier 3, and the second evaporator 11 does not participate in heat exchange.

[0068] like Figure 1 As shown, the fresh air dehumidification device also includes a primary filter 23 and a regeneration filter 24. The primary filter 23 is located at the fresh air inlet of the dehumidification component to filter large particles and foreign matter in the fresh air. The regeneration filter 24 is located at the fresh air inlet of the regeneration component to filter impurities in the gas entering the air inlet.

[0069] like Figure 1 As shown, the fresh air dehumidification equipment also includes a sixth main pipeline and a third pump body 213. The two ends of the sixth main pipeline are respectively connected to the liquid outlet and the liquid inlet of the solution regeneration device, and the third pump body 213 is arranged on the sixth main pipeline.

[0070] In this embodiment, the working principle of the fresh air dehumidification equipment is as follows:

[0071] When the fresh air is higher than or equal to the preset temperature value such as 10°C, the normal mode is started, which is generally used in summer and transition seasons. After being filtered, the fresh air on the dehumidification side is initially cooled and dehumidified by cold water through the first cooling device 1, and then enters the first solution dehumidifier 2 for further cooling and dehumidification through the low-temperature dehumidification solution. At this time, the second solution dehumidifier 3 is not started, the first pump body 211, the first dilute solution valve 221 and the first concentrated solution valve 223 are opened, and the second pump body 212, the second dilute solution valve 222 and the second concentrated solution valve 224 are closed. The air after solution dehumidification is finally dehumidified by the rotor 4, and the humidity reaches the requirement. The thermostat 5 further adjusts the air temperature and sends it into the room. After being filtered, the fresh air on the regeneration side is first heated by the condenser 7 to regenerate the rotor 4, the air temperature is reduced, the humidity is increased, and then it enters the solution regeneration device 10 to contact with the regeneration solution, the air is heated and humidified, and the solution is concentrated. The regenerated air continues to pass through the first evaporator 8, recovers the heat of the air after the solution regeneration and transfers it to the condenser 7, and finally passes through the second evaporator 11, further recovers the exhaust heat and transfers it to the heating device 16, and finally is discharged through the second fan 12. At this time, the first control valve 181 is opened, the second control valve 182 is closed, and the second cooling device 20 does not participate in the heat exchange.

[0072] When the fresh air is lower than a preset temperature value such as 10°C, the low temperature mode is activated, which is generally used in winter. Different from the conventional mode, solution dehumidification is performed in the second solution dehumidifier 3, the second pump body 212 is started, the second dilute solution valve 222 and the second concentrated solution valve 224 are opened, and the first pump body 211, the first dilute solution valve 221 and the first concentrated solution valve 223 are closed. The first control valve 181 is closed and the second control valve 182 is opened. The cold capacity of the second cooling device 20 is used to cool the dehumidification solution in the second solution dehumidifier 3, and the second evaporator 11 does not participate in heat exchange.

[0073] Specifically, the fresh air dehumidification equipment reduces the dehumidification load of the rotor through precooling and solution dehumidification, thereby reducing the regeneration temperature and regeneration heat, and recovering the heat in the air after solution regeneration to achieve regeneration of the rotor. Moreover, according to the different fresh air temperatures, it can operate in normal mode and low temperature mode. Especially in low temperature mode, there is no frost problem in the solution, which is suitable for the operation of fresh air throughout the year.

[0074] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0075] The fresh air dehumidification equipment includes a dehumidification component, a rotor, a regeneration component and a heat exchange system. The dehumidification component includes a first cooling device, a solution dehumidification component and a first fan arranged in sequence. The first cooling device is used to cool the fresh air, and the solution dehumidification component is used to dehumidify the fresh air. The rotor has a dehumidification zone and a regeneration zone. The dehumidification zone is located between the solution dehumidification component and the first fan. The regeneration component includes a condenser, a solution regeneration device, a first evaporator and a second fan arranged in sequence. The condenser is connected to the first evaporator through a connecting pipeline. The regeneration zone is located between the condenser and the solution regeneration device. The solution regeneration device is connected to the solution dehumidification component. The condenser is used to heat the airflow to form a hot airflow. The hot airflow passes through the regeneration zone and contacts with the solution in the solution regeneration device. The heat exchange system includes a second evaporator, a heating device and a second cooling device. The heat exchange system has a first heat exchange state in which the heating device and the second evaporator are located on the first heat exchange flow path, and a second heat exchange state in which the heating device and the second cooling device are located on the second heat exchange flow path; the heating device is used to heat the solution in the solution regeneration device, and the second cooling device is used to cool the circulating solution in at least part of the solution dehumidification component. In this way, during the operation of the fresh air dehumidification equipment, part of the fresh air is processed by the first cooling device, the solution dehumidification component, and the dehumidification zone in turn to form dry air supply, and part of the fresh air is heated by the condenser and passes through the regeneration zone and the solution regeneration device in turn to achieve the regeneration of the rotor and the solution. The heat of the rotor regeneration comes from the heat exchange system and the condenser, and the heat of the regenerated solution and the cold of the dehumidified solution are obtained according to the fresh air temperature. Specifically, when the temperature of the fresh air is greater than or equal to the preset temperature value, the heat exchange system is in a first heat exchange state, the first heat exchange flow path is put into use, and the heat of the regeneration solution comes from the first heat exchange flow path; when the temperature of the fresh air is less than the preset temperature value, the heat exchange system is in a second heat exchange state, the second heat exchange flow path is put into use, and the heat of the regeneration solution comes from the second heat exchange flow path, and the cold of the dehumidification solution comes from the second cooling device, so as to reduce the dehumidification load of the rotor through the composite solution dehumidification technology, thereby reducing the regeneration temperature of the rotor, and making full use of the heat in the regeneration solution to achieve rotor regeneration. Since a solution dehumidification method is used instead of a direct expansion evaporator for dehumidification, there is no problem of evaporator frosting, thereby avoiding the evaporator from frosting. It is suitable for fresh air operation conditions throughout the year, has low regeneration energy consumption, and high system efficiency, thereby solving the problems of low energy efficiency, limited operating range and excessive energy consumption of the rotor dehumidification method in the prior art under specific conditions.

[0076] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0077] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0078] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0079] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0080] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fresh air dehumidification device, characterized in that: include: A dehumidification component, comprising a first cooling device (1), a solution dehumidification component and a first fan (6) which are arranged in sequence, wherein the first cooling device (1) is used to cool down the fresh air, and the solution dehumidification component is used to dehumidify the fresh air; A rotor (4) having a dehumidification zone (41) and a regeneration zone (42), wherein the dehumidification zone (41) is located between the solution dehumidification component and the first fan (6); A regeneration component, comprising a condenser (7), a solution regeneration device (10), a first evaporator (8) and a second fan (12) which are arranged in sequence, the condenser (7) and the first evaporator (8) being connected via a connecting pipe (25), the regeneration zone (42) being located between the condenser (7) and the solution regeneration device (10), and the solution regeneration device (10) being connected to the solution dehumidification component; the condenser (7) being used to heat an airflow to form a hot airflow, the hot airflow passing through the regeneration zone (42) and contacting the solution in the solution regeneration device (10); A heat exchange system, comprising a second evaporator (11), a heating device (16) and a second cooling device (20), wherein the heat exchange system has a first heat exchange state in which the heating device (16) and the second evaporator (11) are located on a first heat exchange flow path, and a second heat exchange state in which the heating device (16) and the second cooling device (20) are located on a second heat exchange flow path; the heating device (16) is used to heat the solution in the solution regeneration device (10), and the second cooling device (20) is used to cool at least part of the circulating solution in the solution dehumidification component; the second fan (12) is located on a side of the second evaporator (11) away from the solution regeneration device (10); Wherein, when the temperature of the fresh air is greater than or equal to the preset temperature value, the heat exchange system is in the first heat exchange state; when the temperature of the fresh air is less than the preset temperature value, the heat exchange system is in the second heat exchange state.

2. The fresh air dehumidification equipment according to claim 1, characterized in that: The dehumidification component further comprises a third cooling device (13), and the solution dehumidification component comprises: A first solution dehumidifier (2), wherein the third cooling device (13) is used to cool the circulating solution in the first solution dehumidifier (2); A second solution dehumidifier (3), wherein the second cooling device (20) is used to cool the circulating solution in the second solution dehumidifier (3); The first solution dehumidifier (2) and the second solution dehumidifier (3) can be selectively put into use. When the temperature of the fresh air is greater than or equal to a preset temperature value, the first solution dehumidifier (2) is put into use; when the temperature of the fresh air is less than the preset temperature value, the second solution dehumidifier (3) is put into use.

3. The fresh air dehumidification equipment according to claim 2, characterized in that: The regeneration component further includes a first compressor (151) and a first throttle valve (171) arranged on the connecting pipeline (25); the fresh air dehumidification equipment further includes: a second compressor (152); A first main pipeline (26), wherein the second compressor (152) and the heating device (16) are both arranged on the first main pipeline (26); a first branch pipeline (27), wherein two ends of the first branch pipeline (27) are respectively connected to a first end of the first main pipeline (26) and a liquid inlet of the second evaporator (11); a second branch pipeline (28), wherein two ends of the second branch pipeline (28) are respectively connected to the second end of the first main pipeline (26) and the liquid outlet of the second evaporator (11); a third branch pipeline (29), the third branch pipeline (29) passing through the second cooling device (20), and the two ends of the third branch pipeline (29) being respectively connected to the first end and the second end of the first main pipeline (26); The second throttle valve (172) is arranged on the first main pipeline (26).

4. The fresh air dehumidification equipment according to claim 3 is characterized in that: The fresh air dehumidification equipment also includes: a first control valve (181), the first control valve (181) being arranged on the first branch pipeline (27) to control the on-off state of the first branch pipeline (27); and / or, a second control valve (182), the second control valve (182) being arranged on the third branch pipeline (29) to control the on-off state of the third branch pipeline (29); and / or, a first one-way valve (191), the first one-way valve (191) being arranged on the second branch pipeline (28), the conducting direction of the first one-way valve (191) being the direction from the liquid outlet of the second evaporator (11) to the second end of the first main pipeline (26); and / or A second one-way valve (192), wherein the second one-way valve (192) is arranged on the third branch pipeline (29), and the conducting direction of the second one-way valve (192) is from the first end to the second end of the first main pipeline (26).

5. The fresh air dehumidification equipment according to claim 4, characterized in that: The fresh air dehumidification equipment also includes: a second main pipeline (30), wherein a first end of the second main pipeline (30) is connected to a liquid discharge port of the solution regeneration device (10); a fourth branch pipeline (31), wherein two ends of the fourth branch pipeline (31) are respectively connected to the second end of the second main pipeline (30) and the liquid replenishing port of the first solution dehumidifier (2); A fifth branch pipeline (32), the two ends of which are respectively connected to the second end of the second main pipeline (30) and the liquid replenishing port of the second solution dehumidifier (3).

6. The fresh air dehumidification equipment according to claim 5, characterized in that: The fresh air dehumidification equipment also includes: a third main pipeline (33), wherein a first end of the third main pipeline (33) is connected to a liquid return port of the solution regeneration device (10); a sixth branch pipeline (34), wherein two ends of the sixth branch pipeline (34) are respectively connected to the second end of the third main pipeline (33) and the liquid outlet of the first solution dehumidifier (2); a seventh branch pipeline (35), wherein both ends of the seventh branch pipeline (35) are respectively connected to the second end of the third main pipeline (33) and the liquid outlet of the second solution dehumidifier (3); and / or, A heat recovery device (14) is arranged on the second main pipeline (30) and the third main pipeline (33).

7. The fresh air dehumidification equipment according to claim 6, characterized in that: The fresh air dehumidification equipment also includes: a fourth main pipeline (36), wherein two ends of the fourth main pipeline (36) are respectively connected to the liquid inlet and the liquid outlet of the first solution dehumidifier (2), and the sixth branch pipeline (34) is connected to the middle part of the fourth main pipeline (36); A first pump body (211) is arranged on the fourth main pipeline (36); Wherein, the third cooling device (13) is arranged on the fourth main pipeline (36).

8. The fresh air dehumidification equipment according to claim 7, characterized in that: The fresh air dehumidification equipment also includes: a fifth main pipeline (37), wherein both ends of the fifth main pipeline (37) are respectively connected to the liquid inlet and the liquid outlet of the second solution dehumidifier (3), and the seventh branch pipeline (35) is connected to the middle part of the fifth main pipeline (37); A second pump body (212) is arranged on the fifth main pipeline (37); Wherein, the fifth main pipeline (37) passes through the second cooling device (20).

9. The fresh air dehumidification equipment according to claim 1, characterized in that: The fresh air dehumidification equipment also includes: an auxiliary heating device (9), the auxiliary heating device (9) being located between the rotor (4) and the condenser (7) for heating the air entering the regeneration zone (42); and / or, The thermostat (5) is located between the dehumidification zone (41) and the first fan (6).

10. The fresh air dehumidification equipment according to claim 8, characterized in that: The fresh air dehumidification equipment also includes: a control module electrically connected to the first pump body (211), the second pump body (212), the first control valve (181), and the second control valve (182); The fresh air dehumidification device has a normal mode and a low temperature mode. When the temperature of the fresh air is greater than or equal to a preset temperature value, the control module is used to control the first pump body (211) to start, the first control valve (181) to open, and the second control valve (182) and the second pump body (212) to close, so that the fresh air dehumidification device is in the normal mode. When the temperature of the fresh air is less than the preset temperature value, the control module is used to control the second pump body (212) to start, the first control valve (181) and the first pump body (211) to close, and the second control valve (182) to open.

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