Dual temperature heat pump driven hybrid dehumidification system

Abstract

This invention discloses a dual-temperature heat pump driven composite dehumidification system, comprising a dual-temperature heat pump drive subsystem, a dehumidification heat exchanger subsystem, and a dehumidification rotor subsystem. The dehumidification heat exchanger subsystem and the dehumidification rotor subsystem are connected in series in their gas pipelines, respectively achieving primary dehumidification and pre-cooling of the gas and secondary dehumidification of the gas. The evaporator and primary condenser of the dual-temperature heat pump drive subsystem provide dehumidification cooling and regeneration heat to the dehumidification heat exchanger subsystem, respectively. The secondary condenser of the dual-temperature heat pump drive subsystem provides regeneration heat to the dehumidification rotor subsystem. Based on the cold and heat source supply of the dual-temperature heat pump, the chilled and hot water provided by the evaporator and the first condenser provides energy for the adsorption and desorption primary dehumidification of the dehumidification heat exchanger system, and the hot water provided by the second condenser provides energy for rotor regeneration of the dehumidification rotor system. This system not only achieves good energy matching but also enhances dehumidification capacity.

Description

Technical Field

[0001] This invention relates to a heat pump driven two-stage dehumidification system, and more particularly to a dual-temperature heat pump driven composite dehumidification system. Background Technology

[0002] With economic and social development, my country's manufacturing industry has also made significant progress and achievements. Strict humidity control is required in every stage of industrial production, such as product quality control, raw material protection, production environment optimization, and product storage and transportation. By applying appropriate dehumidification technologies, manufacturers can improve production efficiency, reduce costs, and provide higher-quality products. However, industrial dehumidification is a high-energy-consuming process; industrial dehumidification equipment requires substantial energy to operate, posing a challenge to enterprises' energy consumption and costs.

[0003] Traditional dehumidification methods, specifically condensation dehumidification, typically use a refrigeration cycle system to lower the air temperature, causing water vapor to condense into liquid, thus achieving dehumidification. The high energy consumption of this condensation method stems from the fact that it requires lowering the air temperature below the dew point, creating a sufficiently large temperature difference. This temperature difference leads to energy loss during heat transfer, increasing system energy consumption. To address these issues, it is necessary to explore energy-efficient and effective dehumidification solutions.

[0004] Solid adsorption dehumidification, as a low-energy-consumption dehumidification technology, operates on the principle of using the partial pressure difference of water vapor to drive the adsorption and desorption of solid adsorbents. Compared to traditional condensation dehumidification, it avoids the energy loss problem caused by high-temperature differences, and the temperature does not need to be lowered below the dew point temperature during the process. Furthermore, in condensation dehumidification, when the dew point temperature is below 0°C, frost will form on the evaporator, affecting the system's energy efficiency and thus preventing deep dehumidification. Solid adsorption dehumidification, however, is not limited by the dew point temperature and can achieve deep dehumidification.

[0005] Both dehumidifier heat exchangers and dehumidifier rotors are typical dehumidification devices that employ solid adsorption. Their basic dehumidification principles are similar: during adsorption dehumidification, the partial pressure of water vapor in the air inside the adsorbent is lower than that in the external environment, causing water molecules in the air to be absorbed by the adsorbent. In a dehumidifier heat exchanger, cold water is circulated inside, lowering the temperature of the desiccant and thus reducing the temperature of the air inside, thereby lowering its water vapor partial pressure. Similarly, a dehumidifier rotor pre-cools the air entering the processing zone, allowing the air in the processing zone to cool the solid adsorbent on the rotor, thereby reducing the water vapor partial pressure of the air inside the desiccant.

[0006] During regeneration and desorption, heating raises the partial pressure of water vapor inside the desiccant to be higher than that of the external environment, allowing water molecules inside the desiccant to desorb into the air. Here, the dehumidification heat exchanger circulates hot water, raising the temperature of the desiccant and consequently the temperature of the air inside, thus increasing its water vapor partial pressure. The dehumidification rotor heats the regeneration air, causing the air in the regeneration zone to heat the solid adsorbent on the rotor, thereby increasing the water vapor partial pressure of the air inside the desiccant.

[0007] For solid desiccant dehumidification processes, the most energy-intensive part is the supply of heat and cold to drive the adsorption and desorption processes. Based on actual engineering resources, it is essential to fully consider using low-grade energy sources such as waste heat and residual heat to meet the regeneration heating requirements as much as possible. Therefore, combining a heat pump system with a dehumidification system would be a perfect solution. The evaporator and condenser of the heat pump system provide the cold source and heat source respectively, which can significantly reduce the system's energy consumption.

[0008] A patent document, CN 114719459 A, discloses a deep dehumidification system driven by a cascade heat pump and its application. The system includes: a cascade heat pump with low-temperature and high-temperature refrigeration cycles, a primary dehumidification impeller, and a secondary dehumidification impeller. Humid air is condensed and dehumidified at the cold end of the cascade heat pump, then enters the dehumidification zone of the primary dehumidification impeller for primary adsorption dehumidification. After primary adsorption dehumidification, depending on dehumidification requirements, it either exits from the outlet of the primary dehumidification impeller or enters the dehumidification zone of the secondary dehumidification impeller for secondary adsorption dehumidification. Regenerated air is heated at the hot end of the cascade heat pump and flows out from the hot end outlet. Depending on regeneration requirements, it either enters the regeneration zones of both the primary and secondary dehumidification impellers, or only the regeneration zone of the primary dehumidification impeller, to regenerate the desiccant. The number of dehumidification stages of the impeller can be adjusted according to different operating conditions to meet the deep dehumidification requirements of air with different humidity ranges. However, this system still suffers from high energy consumption. For the dehumidifying rotor, the pre-cooling and dehumidification processes are separate. During the rotor adsorption process, the adsorption heat cannot be dissipated in time, resulting in a decrease in dehumidification capacity. Furthermore, the second-stage rotor dehumidification also requires an additional surface cooler for pre-cooling. These drawbacks cause the two-stage dehumidifying rotor system to not only fail to meet the expected dehumidification capacity but also experience high energy consumption on both the pre-cooling and regeneration sides.

[0009] Therefore, there is an urgent need to develop a dehumidification system that can not only deeply dehumidify but also reduce the overall system energy consumption, making it more suitable for the needs of low dew point conditions in industry. Summary of the Invention

[0010] The purpose of this invention is to provide a dual-temperature heat pump driven composite dehumidification system that combines the advantages of a dehumidification heat exchanger, such as large dehumidification capacity and stable moisture content at the dehumidification impeller outlet. At the same time, the heat pump system provides adsorption cooling and regeneration heating respectively, which greatly improves the overall performance of the system and has the characteristics of energy saving, consumption reduction and deep dehumidification.

[0011] To achieve the above objectives, the present invention provides the following technical solution: A dual-temperature heat pump driven composite dehumidification system mainly consists of three parts: a dual-temperature heat pump drive subsystem, a dehumidification heat exchanger subsystem, and a dehumidification rotor subsystem. The dehumidification heat exchanger subsystem and the dehumidification rotor subsystem are connected in series in their gas pipelines to achieve primary dehumidification and pre-cooling of the gas, as well as secondary dehumidification of the gas. The evaporator and primary condenser of the dual-temperature heat pump drive subsystem provide dehumidification cooling capacity and regeneration heat capacity to the dehumidification heat exchanger subsystem, respectively. The secondary condenser of the dual-temperature heat pump drive subsystem provides regeneration heat capacity to the dehumidification rotor subsystem.

[0012] In this invention, the dual-temperature heat pump subsystem provides a heat source for the dehumidifier heat exchanger and dehumidifier impeller, driving the adsorption and desorption processes of the dehumidifier heat exchanger subsystem. The second condenser of the dual-temperature heat pump subsystem serves as a heat source to drive the regeneration process of the dehumidifier impeller subsystem.

[0013] As a preferred embodiment, the dual-temperature heat pump drive subsystem includes an evaporator; a primary condenser and a secondary condenser connected in parallel with the evaporator via branches; and a primary compressor, a primary expansion valve, a secondary compressor, and a secondary expansion valve respectively installed on the two parallel branches.

[0014] As a preferred embodiment, the dual-temperature heat pump drive subsystem includes: Evaporator; A primary compressor, a primary condenser, and a primary expansion valve form a primary circulation loop with the evaporator through piping. The evaporator forms a two-stage circulation loop with the primary compressor, secondary compressor, secondary condenser, and secondary expansion valve through pipelines connected in parallel with the primary condenser and arranged sequentially.

[0015] Preferably, both the evaporator and the primary condenser are shell-and-tube heat exchangers, which provide dehumidification cooling and regeneration heating to the dehumidification heat exchanger subsystem through cold water circulation pipes and hot water circulation pipes, respectively.

[0016] As a specific implementation scheme, the dual-temperature heat pump subsystem includes an evaporator, a first compressor (as the primary compressor), a first condenser (as the primary condenser), a first expansion valve (as the primary expansion valve), a second compressor (as the secondary compressor), a second condenser (as the secondary condenser), and a second expansion valve (as the secondary expansion valve). The two-stage refrigerant circuit of the dual-temperature heat pump system includes, in sequence, an evaporator, a first compressor, a first condenser, a second compressor, a second condenser, a second expansion valve, and a first expansion valve.

[0017] In actual connection, the evaporator, first compressor, first condenser, and first expansion valve are connected sequentially via pipelines according to the working fluid flow direction, forming a primary circulation loop. Similarly, the evaporator, first compressor, second compressor, second condenser, second expansion valve, and first expansion valve are connected sequentially via pipelines according to the working fluid flow direction, forming a secondary circulation loop. The inlet pipeline of the second compressor and the working fluid inlet pipeline of the first condenser are simultaneously connected to the outlet pipeline of the first compressor; the outlet pipeline of the second expansion valve and the working fluid outlet pipeline of the first condenser are simultaneously connected to the inlet pipeline of the first expansion valve.

[0018] In actual operation, the refrigerant of the dual-temperature heat pump subsystem is divided into two circuits for two-stage compression. The refrigerant first passes through the evaporator, and the refrigerant that has undergone one-stage compression by the first compressor is divided into two paths. One path of refrigerant enters the first condenser, and the second path enters the second compressor for compression, and then flows into the second condenser and the second expansion valve. The two refrigerant paths then merge and enter the first expansion valve together.

[0019] As a preferred embodiment, the dehumidifier heat exchanger subsystem is a two-stage dehumidifier heat exchanger structure arranged in parallel. The two stages of dehumidifier heat exchangers are respectively connected to the dehumidification cooling capacity and regeneration heat supply pipelines of the heat pump drive subsystem through three-way switching valves.

[0020] As a further optimization, a two-stage dehumidification heat exchanger alternates between dehumidification and regeneration.

[0021] As a further preferred embodiment, the inlets of the gas pipelines within the two dehumidifying heat exchangers are connected to two gas inlet pipes via a four-way inlet switching valve, allowing independent access to the processing gas and regeneration gas for the two-stage dehumidifying heat exchangers; the gas pipeline outlets are connected to the inlet pipeline of the dehumidifying impeller subsystem via a four-way outlet switching valve, which also has a port for connection to the exhaust pipeline; for any dehumidifying heat exchanger, during dehumidification, its internal gas pipeline serves as the processing gas dehumidification pipeline, and during regeneration, it serves as the regeneration exhaust pipeline.

[0022] As a preferred embodiment, the dehumidifier heat exchanger system includes an air inlet valve, a first water inlet valve, a first dehumidifier heat exchanger, a first water outlet valve, a second water inlet valve, a second dehumidifier heat exchanger, a second water outlet valve, and an air outlet valve. The first water inlet valve and the second water outlet valve are generally three-way switching valves. The air inlet valve and the air outlet valve are generally four-way switching valves to switch between regeneration exhaust air and treated air.

[0023] In actual connection, the outlet of the evaporator chilled water line in the dual-temperature heat pump subsystem is connected to the inlet of the medium line of the dehumidifier heat exchanger in the dehumidifier heat exchanger subsystem via the first inlet valve; the return (or inlet) of the evaporator chilled water line is connected to the outlet of the medium line of the dehumidifier heat exchanger in the dehumidifier heat exchanger subsystem via the first outlet valve; the hot water line of the first-stage condenser in the dual-temperature heat pump subsystem is connected to the inlet of the medium line of the dehumidifier heat exchanger in the dehumidifier heat exchanger subsystem via the second inlet valve; the return (or inlet) of the hot water line of the first-stage condenser is connected to the outlet of the medium line of the dehumidifier heat exchanger in the dehumidifier heat exchanger subsystem via the second outlet valve. The two dehumidifier heat exchangers alternately perform dehumidification and regeneration, achieving continuous operation.

[0024] In actual operation, the dehumidifier heat exchanger subsystem has two switching modes. In mode one, the first dehumidifier heat exchanger acts as a dehumidifier evaporator, performing adsorption; the second dehumidifier heat exchanger acts as a dehumidifier condenser, performing regeneration. In mode two, the first dehumidifier heat exchanger acts as a dehumidifier condenser, performing regeneration, and the second dehumidifier heat exchanger acts as a dehumidifier evaporator, performing dehumidification.

[0025] In Mode 1, the evaporator of the dual-temperature heat pump provides chilled water as the cold source. The chilled water circuit flows out of the evaporator, first passing through the first inlet valve, the first dehumidifying heat exchanger, and the first outlet valve before returning to the evaporator. The first condenser of the dual-temperature heat pump provides hot water as the heat source. The hot water circuit flows out of the first condenser, first passing through the second inlet valve, the second dehumidifying heat exchanger, and the second outlet valve before returning to the first condenser.

[0026] In Mode 2, the chilled water circuit provided by the evaporator of the dual-temperature heat pump flows out of the evaporator, first through the first inlet valve, the second dehumidifying heat exchanger, and the first outlet valve, before returning to the evaporator. The hot water circuit provided by the dual-temperature heat pump flows out of the first condenser, first through the second inlet valve, the first dehumidifying heat exchanger, and the second outlet valve, before returning to the first condenser.

[0027] Preferably, the dehumidifying impeller subsystem is a structure of one or more dehumidifying impellers connected in series. More preferably, the dehumidifying impeller system is a single dehumidifying impeller structure.

[0028] As a further preferred embodiment, the dehumidification rotary system includes a dehumidification rotary wheel, a processing air fan, and a regeneration air fan. The airflow path of the dehumidification rotary system, on the processing side, sequentially passes through the processing side of the dehumidification rotary wheel, the processing air fan, and the processing air exhaust. The airflow path of the dehumidification rotary system, on the regeneration side, sequentially passes through the regeneration side of the dehumidification rotary wheel, the regeneration air fan, and the regeneration air exhaust.

[0029] In actual connection, the inlet ends of the two gas pipelines of the dehumidifier heat exchanger subsystem are equipped with inlet air valves; the outlets of the two gas pipelines are connected to the dehumidifier rotary wheel processing air pipeline through pipelines equipped with four-way valves to achieve dehumidification of the processed gas. The inlet air valve has two inlet air channels, and the outlet air valve has two outlet air channels, one of which is connected to the condenser exhaust air pipeline, and the other is connected to the dehumidifier rotary wheel processing air pipeline.

[0030] As a preferred embodiment, the air path of the dehumidifying rotor subsystem, based on the two switching modes of the dehumidifying heat exchanger subsystem, also has two different switching modes for the processing air path of the dehumidifying rotor. In mode one, where the first dehumidifying heat exchanger is a dehumidifying evaporator and the second dehumidifying heat exchanger is a dehumidifying condenser, adjusting the inlet and outlet air valves causes the first inlet air to pass through the inlet air valve, the second dehumidifying heat exchanger, and the outlet air valve, i.e., condensed exhaust air is discharged outdoors. The second inlet air first passes through the inlet air valve, the first dehumidifying heat exchanger, the outlet air valve, the dehumidifying rotor processing area, and the processing air fan, i.e., the processing air dehumidification is completed.

[0031] In Mode 2, when the first dehumidifying heat exchanger acts as a dehumidifying condenser and the second dehumidifying heat exchanger acts as an evaporator, adjusting the inlet and outlet air valves causes the first inlet air to pass through the inlet air valve, the second dehumidifying heat exchanger, the outlet air valve, the dehumidifying impeller, and the processing air fan, thus completing the dehumidification process. The second inlet air then passes through the inlet air valve, the first dehumidifying heat exchanger, and the outlet air valve, resulting in the condensate being discharged.

[0032] The regeneration air path between the dual-temperature heat pump and the dehumidifier rotor passes sequentially through the second condenser, the regeneration side of the dehumidifier rotor, and the regeneration air fan to obtain the regeneration air exhaust. That is, in the regeneration side air path of the dehumidifier rotor system, the regeneration air intake passes sequentially through the second condenser, the regeneration zone of the dehumidifier rotor, and the regeneration air fan, and then the regeneration air is discharged.

[0033] This invention features a two-stage dehumidification system, enabling humidity control in low dew point environments. Simultaneously, based on the cold and heat source supply from a dual-temperature heat pump, the chilled and hot water provided by the evaporator and the first condenser provides energy for the adsorption and desorption stages of the dehumidification heat exchanger system, while the hot water provided by the system's second condenser provides energy for the dehumidification rotor system's regeneration. This system not only achieves excellent energy matching but also enhances dehumidification capacity.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a primary dehumidification heat exchanger as the dehumidification method. Since it has cold water flowing inside as an internal cooling source, the cooling and dehumidification processes can be carried out simultaneously, which can improve the dehumidification capacity of the entire system.

[0035] 2. This invention employs alternating refrigerant reversal between cold and hot water, achieving adsorption and regeneration of two dehumidifying heat exchangers. Compared to dehumidifying heat pump systems, the refrigerant in this invention does not need to be reversed, making the corresponding dual-temperature heat pump system more stable and extending its lifespan.

[0036] 3. This system uses a secondary dehumidification rotor as an auxiliary component, making the outlet air of the processing zone more stable. The original dehumidification heat exchanger had an issue with unstable moisture content in the outlet air. However, by using the auxiliary secondary dehumidification rotor, not only can the outlet moisture content be stabilized, but deep dehumidification can also be achieved.

[0037] In summary, this invention combines a heat pump system, a dehumidifying heat exchanger system, and a dehumidifying rotor system, which solves the problem of high energy consumption in traditional condensation dehumidification. It also solves the technical problems of unstable outlet moisture content when using a dehumidifying heat exchanger system alone and limited dehumidification capacity when using a dehumidifying rotor system alone. The result is a composite dehumidification system with large dehumidification capacity, stable outlet moisture content, and deep dehumidification capability. Attached Figure Description

[0038] Figure 1 This is a flowchart of a composite dehumidification system provided in the embodiments section.

[0039] Figure 2 They are respectively Figure 1 The diagram shows the operation of the dehumidification system under two operating modes (flow diagrams of Mode 1 and Mode 2).

[0040] In the diagram: 1. Evaporator; 2. First compressor; 3. First condenser; 4. First expansion valve; 5. Second compressor; 6. Second condenser; 7. Second expansion valve; 8. First water inlet valve; 9. First dehumidifying heat exchanger; 10. First water outlet valve; 11. Second water inlet valve; 12. Second dehumidifying heat exchanger; 13. Second water outlet valve; 14. First air inlet; 15. Air inlet valve; 16. Air outlet valve; 17. Dehumidifying impeller; 18. Processing air fan; 19. Processing air exhaust; 20. Second air inlet; 21. Condenser exhaust; 22. Regeneration air inlet; 23. Regeneration air fan; 24. Regeneration air exhaust. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] in Figure 1 , Figure 2 In the diagram, the thin solid line represents the cooling medium circulation loop in the dual-temperature heat pump subsystem; the thick solid line represents the (cold / hot) water circulation loop; and the dashed line represents the (treatment / discharge) gas pipeline.

[0043] Please see Figure 1 The present invention discloses a dual-temperature heat pump driven composite dehumidification heat pump, which mainly consists of three parts: a dual-temperature heat pump subsystem, a dehumidification heat exchanger subsystem, and a dehumidification rotor system.

[0044] The dual-temperature heat pump subsystem includes an evaporator 1, a first compressor 2, a first condenser 3, a first expansion valve 4, a second compressor 5, a second condenser 6, and a second expansion valve 7. The dehumidification heat exchanger subsystem includes a first inlet valve 8, a first dehumidification heat exchanger 9, a first outlet valve 10, a second inlet valve 11, a second dehumidification heat exchanger 12, a second outlet valve 13, an inlet air valve 15, and an outlet air valve 16. The dehumidification rotor subsystem includes a dehumidification rotor 17, a processing air fan 18, and a regeneration air fan 23.

[0045] The dehumidified air first undergoes primary dehumidification through the dehumidification heat exchanger subsystem. Simultaneously, the dehumidification rotary dehumidification subsystem also pre-cools the air through the dehumidification heat exchanger subsystem. Next, the air undergoes secondary dehumidification through the dehumidification rotary system, completing the deep dehumidification process.

[0046] In the specific connection, in the dual-temperature heat pump subsystem, according to the refrigerant flow direction, evaporator 1, first compressor 2, first condenser 3, and first expansion valve 4 are connected sequentially through pipelines to form a primary circulation loop. Similarly, according to the refrigerant flow direction, evaporator 1, first compressor 2, second compressor 5, second condenser 6, second expansion valve 7, and first expansion valve 4 are connected sequentially through pipelines to form a secondary circulation loop. The inlet pipeline of the second compressor 5 and the refrigerant inlet pipeline of the first condenser 3 are simultaneously connected to the outlet pipeline of the first compressor 2; the outlet pipeline of the second expansion valve 7 and the refrigerant outlet pipeline of the first condenser 3 are simultaneously connected to the inlet pipeline of the first expansion valve 4. In actual operation, the refrigerant in the dual-temperature heat pump subsystem is divided into two loops for two-stage compression. The refrigerant first passes through the evaporator, and the refrigerant that has undergone primary compression by the first compressor is divided into two paths. One path enters the first condenser, and the second path enters the second compressor for further compression, then flows into the second condenser and the second expansion valve. The two refrigerant paths then merge and enter the first expansion valve together.

[0047] In the dual-temperature heat pump subsystem, a parallel two-stage dehumidification heat exchanger structure is adopted. The two dehumidification heat exchangers are connected to the dehumidification cooling capacity and regeneration heat supply pipelines of the heat pump drive subsystem via three-way switching valves. In actual connection, the cold water outlet of evaporator 1 in the dual-temperature heat pump subsystem is connected to the medium pipeline inlet of the dehumidification heat exchanger in the dehumidification heat exchanger subsystem via the first inlet valve 8; the cold water return port of evaporator 1 is connected to the medium pipeline outlet of the dehumidification heat exchanger in the dehumidification heat exchanger subsystem via the first outlet valve 10; the hot water pipeline of the first condenser 3 in the dual-temperature heat pump subsystem is connected to the medium pipeline inlet of the dehumidification heat exchanger in the dehumidification heat exchanger subsystem via the second inlet valve 11; and the hot water return port of the first condenser is connected to the medium pipeline outlet of the dehumidification heat exchanger in the dehumidification heat exchanger subsystem via the second outlet valve 13. The two dehumidification heat exchangers alternately perform dehumidification and regeneration, achieving continuous operation.

[0048] In the dehumidification rotary subsystem, the inlet ends of the two gas pipelines of the dehumidification heat exchanger subsystem are equipped with inlet air valves 15; the outlets of the two gas pipelines are connected to the dehumidification rotary processing air pipeline through pipelines equipped with outlet air valves 16, thereby achieving dehumidification of the processed air. The inlet air valve 14 has two inlet channels, connected to the first inlet air 14 and the second inlet air 20 pipelines respectively. The outlet air valve 16 has two outlet channels, one connected to the condenser exhaust pipeline and the other connected to the dehumidification rotary processing air pipeline. The first water inlet valve 8, the first water outlet valve 10, the second water inlet valve 11, and the second water outlet valve 13 are all three-way valves. The inlet air valve 15 and the outlet air valve 16 are all four-way valves. In actual connection, the first inlet valve 8 and the first outlet valve 10 are installed in the cold water circulation loop connected to the evaporator. The first end of the first inlet valve 8 is connected to the cold water outlet of the evaporator, the second end is connected to the medium inlet of the first dehumidifying heat exchanger 9, and the third end is connected to the medium inlet of the second dehumidifying heat exchanger 12. The first outlet valve 10 is connected to the medium outlet of the first dehumidifying heat exchanger 9, the second end is connected to the cold water inlet of the evaporator 1, and the third end is connected to the medium outlet of the second dehumidifying heat exchanger 12. The second inlet valve 11 and the second outlet valve 13 are installed in the hot water circulation loop connected to the first condenser 3. The first end of the second inlet valve 11 is connected to the hot water pipeline outlet of the first condenser 3, the second end is connected to the medium pipeline inlet of the second dehumidifying heat exchanger 12, and the third end is connected to the medium pipeline inlet of the first dehumidifying heat exchanger 9. The first end of the second outlet valve 13 is connected to the medium pipeline outlet of the second dehumidifying heat exchanger 12, the second end is connected to the medium outlet of the first dehumidifying heat exchanger 9, and the third end is connected to the hot water pipeline inlet of the first condenser 3.

[0049] like Figure 2 As shown, evaporator 1 and first condenser 3 produce cold water and hot water respectively, which are supplied to first dehumidifying heat exchanger 9 and second dehumidifying heat exchanger 12 for dehumidification and regeneration. First dehumidifying heat exchanger 9 and second dehumidifying heat exchanger 12 have two combination switching modes, alternating as dehumidifying evaporator and dehumidifying condenser during actual operation. Similarly, based on the switching of first dehumidifying heat exchanger 9 and second dehumidifying heat exchanger 12, the air path also has a synchronous switching process, mainly achieved by switching the inlet air valve 15 and outlet air valve 16.

[0050] The secondary dehumidified air exiting from the air outlet valve 16 first passes through the dehumidification impeller 17 and the handling air fan 18 to complete the secondary dehumidification. As for the regenerated air, the regenerated air inlet 22 passes through the secondary condenser 6, the regeneration zone of the dehumidification impeller 17, and the regenerated air fan 23 in sequence.

[0051] Switch to Mode 1: At this time, the first dehumidifying heat exchanger 9 is a dehumidifying evaporator, and the second dehumidifying heat exchanger 12 is a dehumidifying condenser. The cold water circuit passes sequentially through the evaporator 1, the first inlet valve 8, the first dehumidifying heat exchanger 9, and the first outlet valve 10. The hot water circuit passes sequentially through the first condenser 3, the second inlet valve 11, the second dehumidifying heat exchanger 12, and the second outlet valve 13.

[0052] At this time, the first intake air 14 passes through the second dehumidifying heat exchanger 12, the outlet air valve 16, and the condenser exhaust 21 sequentially, thus regenerating the second dehumidifying heat exchanger 12. The second intake air 20 undergoes two-stage dehumidification treatment, passing through the inlet air valve 15, the first dehumidifying heat exchanger 9, the outlet air valve 16, the processing area of ​​the dehumidifying impeller 17, the processing air fan 18, and the processing air exhaust 19. The regenerated air intake 22 passes through the second condenser 6, the regeneration area of ​​the dehumidifying impeller 17, the regeneration air fan 23, and the regeneration air exhaust 24 sequentially, thus being discharged from the system.

[0053] Switch to Mode 2: At this time, the first dehumidifying heat exchanger 9 is a dehumidifying condenser, and the second dehumidifying heat exchanger 12 is a dehumidifying evaporator. The cold water circuit passes sequentially through the evaporator 1, the first inlet valve 8, the second dehumidifying heat exchanger 12, and the first outlet valve 10. The hot water circuit passes sequentially through the first condenser 3, the second inlet valve 11, the first dehumidifying heat exchanger 9, and the second outlet valve 13.

[0054] At this point, the first air intake 14 undergoes two stages of dehumidification: passing through the inlet air valve 15, the second dehumidifying heat exchanger 12, the outlet air valve 16, the processing area of ​​the dehumidifying impeller 17, the processing air fan 18, and the processing air exhaust 19. The second air intake 20 is discharged outdoors after passing through the inlet air valve 15, the first dehumidifying heat exchanger 9, the outlet air valve 16, and the condensate exhaust 21. The regenerated air intake 22 is discharged from the system after passing through the second condenser 6, the regeneration area of ​​the dehumidifying impeller 17, the regeneration air fan 23, and the regeneration air exhaust 24.

Claims

1. A dual temperature heat pump driven hybrid dehumidification system, characterized in that, The system includes a dual-temperature heat pump drive subsystem, a dehumidifier heat exchanger subsystem, and a dehumidifier rotor subsystem. The dehumidifier heat exchanger subsystem and the dehumidifier rotor system are connected in series in their gas pipelines to achieve primary dehumidification and pre-cooling of the gas, as well as secondary dehumidification of the gas. The evaporator and primary condenser of the dual-temperature heat pump drive subsystem provide dehumidification cooling and regeneration heat to the dehumidifier heat exchanger subsystem, respectively. The secondary condenser of the dual-temperature heat pump drive subsystem provides regeneration heat to the dehumidifier rotor system.

2. The dual-temperature heat pump driven composite dehumidification system according to claim 1, characterized in that, The dual-temperature heat pump drive subsystem includes: Evaporator; A primary compressor, a primary condenser, and a primary expansion valve form a primary circulation loop with the evaporator through piping. The evaporator forms a two-stage circulation loop with the primary compressor, the secondary compressor, the secondary condenser, and the secondary expansion valve, which are connected in parallel with the primary condenser and arranged sequentially through pipelines.

3. The dual-temperature heat pump driven composite dehumidification system according to claim 1 or 2, characterized in that, Both the evaporator and the primary condenser are shell-and-tube heat exchangers, which provide dehumidification cooling and regeneration heating to the dehumidification heat exchanger subsystem through cold water circulation loop and hot water circulation loop, respectively.

4. The dual-temperature heat pump driven composite dehumidification system according to claim 1, characterized in that, The dehumidifier heat exchanger subsystem is a two-stage dehumidifier heat exchanger structure arranged in parallel. The two stages of dehumidifier heat exchangers are respectively connected to the dehumidification cooling capacity and regeneration heat supply pipelines of the heat pump drive subsystem through three-way switching valves.

5. The dual-temperature heat pump driven composite dehumidification system according to claim 4, characterized in that, Two-stage dehumidification heat exchangers alternately perform dehumidification and regeneration.

6. The dual-temperature heat pump driven composite dehumidification system according to claim 5, characterized in that, The gas pipeline inlets of the two dehumidifying heat exchangers are connected to the two gas inlet pipes through a four-way inlet switching valve, and the gas pipeline outlets are connected to the inlet pipe of the dehumidifying impeller subsystem through a four-way outlet switching valve. The four-way outlet switching valve also has a port connected to the exhaust pipe. For any dehumidifying heat exchanger, when dehumidifying, its gas pipeline is the processing gas dehumidification pipeline, and when regenerating, the gas pipeline is the regeneration exhaust pipeline.

7. The dual-temperature heat pump driven composite dehumidification system according to claim 1, characterized in that, The dehumidification impeller subsystem is a structure consisting of one or more dehumidification impellers connected in series.

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