A cold, heat and humidity collaborative control system based on coupling of heat pump technology and solution dehumidification

Abstract

The utility model discloses a cold and hot and wet collaborative control system based on heat pump technology and solution dehumidification coupling belongs to the joint system field of heating and refrigeration, the utility model discloses including cascade heat pump, filler tower, first to third heat exchanger, filter, regenerator, first to seventh three -way valve, first to third electric valve and controller, the present application adopts integrated design, not only has simplified system structure, has reduced equipment redundancy and initial investment cost, and further through energy collaborative optimization, has reduced operation energy consumption greatly, has provided efficient, energy -conserving and highly integrated innovative solution for building environment control, has realized the step -by -step utilization of energy, and overall comprehensive energy efficiency has improved significantly, and has promoted energy -utilization efficiency, can carry out independent cut accurate regulation to temperature and humidity, has improved the stability and comfort of environmental control significantly, the utility model discloses especially be applicable to various to indoor temperature and humidity and air quality have higher requirement large -scale public building and commercial space.

Description

Technical Field

[0001] This utility model relates to a combined heating and cooling system, specifically a coordinated control system for heating, cooling and humidification based on heat pump technology coupled with solution dehumidification. Background Technology

[0002] Traditional building environment control systems have long relied on a separate configuration of equipment based on seasonal needs, resulting in significant energy efficiency shortcomings and system redundancy. In summer, cooling units are needed for temperature control, supplemented by independent dehumidifiers to regulate humidity. In winter, heating systems such as gas boilers, electric heating equipment, or air source heat pumps are required to maintain room temperature, along with additional humidifiers (e.g., steam or ultrasonic) to maintain humidity balance. This separate design not only leads to high initial investment and system complexity but also results in severe energy waste due to a lack of coordination between equipment.

[0003] Traditional building environment control systems have long relied on a model of separately configuring equipment according to seasonal demand, resulting in significant problems of low energy efficiency and system redundancy. Existing cooling, heating, and humidification equipment mainly suffers from the following issues: (1) The system is complex and the initial investment is high: To meet the cooling, heating, and humidity load requirements of the building environment, heating, cooling, and dehumidification equipment usually need to be installed separately, resulting in a complex system structure, large space occupation by equipment and pipes, and high initial investment costs.

[0004] (2) The overall energy efficiency of the system is low: Conventional heating equipment mainly includes boilers, electric heating devices, and air source heat pumps. Boilers rely on burning fossil fuels for heating, with a thermal efficiency generally between 70% and 80%. Electric heating directly converts high-grade electrical energy into low-grade heat energy, resulting in low energy utilization efficiency. Traditional air source heat pumps experience a significant drop in energy efficiency during winter operation. Steam humidification systems require heating water into steam using gas or electricity, leading to substantial energy consumption. Cooling and dehumidification systems require lowering the air temperature below the dew point to achieve dehumidification, and often require reheating to restore the air to a comfortable temperature, resulting in energy waste. This design, where each system operates independently and lacks coordination, makes it difficult to achieve cascaded energy utilization, leading to overall low energy efficiency.

[0005] (3) Unfriendly working environment: Heating boilers use fossil fuels, resulting in significant carbon emissions. Most heat pump products still use Freon-based refrigerants such as R134a and R410A, which have high global warming potential (GWP) and have a significant negative impact on the environment.

[0006] (4) Poor comfort: Freon-based air conditioning systems offer poor comfort during summer cooling, easily leading to "air conditioning sickness," and generally lack effective fresh air handling capabilities. In winter heating, their energy efficiency is low, requiring reliance on energy-intensive electric auxiliary heating. Furthermore, air conditioning systems typically cannot provide humidification in winter, further impacting indoor comfort. Summary of the Invention

[0007] To address the problems existing in the prior art, this utility model proposes a coordinated control system for heating, humidifying, and cooling based on heat pump technology and solution dehumidification. By coupling the efficient energy transfer of the heat pump with the independent temperature and humidity control characteristics of solution dehumidification, the dual needs of heating and humidifying in winter and cooling and dehumidifying in summer can be met simultaneously in a single system, completely eliminating the traditional mode of multiple sets of equipment operating separately. It makes full use of the energy such as condensation heat and evaporation cold generated during the operation of the heat pump, realizing the cascade utilization and recovery of heat, and significantly improving energy utilization efficiency.

[0008] The cascade heat pump includes a high-temperature stage cycle and a low-temperature stage cycle. The low-temperature stage cycle outlet of the condenser-evaporator is connected to the first working fluid inlet of the evaporator via a first throttling valve. The first working fluid outlet of the evaporator is connected to the low-pressure side of the first compressor, and the high-pressure side of the first compressor is connected to the low-temperature stage cycle inlet of the condenser-evaporator, thus forming the low-temperature stage cycle. The high-temperature stage cycle outlet of the condenser-evaporator is connected to the low-pressure side of the second compressor, and the high-pressure side of the second compressor is connected to the second working fluid inlet of the condenser. The second working fluid outlet of the condenser is connected to the high-temperature stage cycle inlet of the condenser-evaporator via a second throttling valve, thus forming the high-temperature stage cycle.

[0009] The present invention relates to a cascade heat pump technology and solution dehumidification coupled cold, heat and humidity co-control system, comprising: a cascade heat pump, a packed tower, first to third heat exchangers, a filter, a regenerator, first to seventh three-way valves, first to third electric valves, and a controller; wherein the first to seventh three-way valves and the first to third electric valves are respectively connected to the controller. Fresh air flows into the air inlet of the packed tower, and the air outlet of the packed tower is connected to the first port of the first three-way valve via the third electric valve. The second port of the first three-way valve is connected to the air inlet of the first heat exchanger, and the third port of the first three-way valve is connected to the user end. The air outlet of the first heat exchanger is connected to the user end. The heat exchange medium outlet of the first heat exchanger is connected to the second port of the second three-way valve, the first port of the second three-way valve is connected to the inlet of the low-grade heat source, and the third port of the second three-way valve is connected to the heat exchange medium inlet of the evaporator; the heat exchange medium outlet of the evaporator is connected to the first port of the third three-way valve, the second port of the third three-way valve is connected to the heat exchange medium inlet of the first heat exchanger, and the third port of the third three-way valve is connected to the outlet of the low-grade heat source. The solution outlet of the packed tower is connected to the solution inlet of the condenser-evaporator through a filter. The solution outlet of the condenser-evaporator is connected to the first port of the fourth three-way valve. The third port of the fourth three-way valve is connected to the first port of the seventh three-way valve. The third port of the seventh three-way valve is connected to the solution inlet of the packed tower. The heat exchange medium outlet of the condenser is connected to the first port of the fifth three-way valve, the second port of the fifth three-way valve is connected to the heat exchange medium inlet of the second heat exchanger, and the heat exchange medium outlet of the second heat exchanger is connected to the second port of the sixth three-way valve; after the air outlet of the packed tower and before the third electric valve, it is connected to the air inlet of the second heat exchanger through the second electric valve; the air outlet of the second heat exchanger is connected to the third electric valve through the first electric valve. The third port of the fifth three-way valve is connected to the heat exchanger inlet of the regenerator; the heat exchanger outlet of the regenerator is connected to the first port of the sixth three-way valve; the third port of the sixth three-way valve is connected to the heat exchanger inlet of the condenser. The second port of the fourth three-way valve is connected to the dilute solution inlet of the third heat exchanger, the dilute solution outlet of the third heat exchanger is connected to the solution inlet of the regenerator, the solution outlet of the regenerator is connected to the concentrated solution inlet of the third heat exchanger, and the concentrated solution outlet of the third heat exchanger is connected to the second port of the seventh three-way valve.

[0010] The various structures are connected to each other, as well as to the valves, via pipes.

[0011] The first working fluid, carbon dioxide, flows in the low-temperature stage circulation; the second working fluid, HFO or NH3, flows in the high-temperature stage circulation. The heat exchange working fluid, air or water, flows between the heat exchange working fluid inlet and outlet. A dehumidifying solution, using a high-concentration dehumidifying salt, is sprayed inside the packed tower. The first to third heat exchangers each have two sets of inlets and outlets, each set connected by a corresponding independent pipe. The two sets of pipes are not connected; only heat exchange occurs between the working fluids.

[0012] Low-grade heat energy provided by low-grade heat sources flows in from the low-grade heat source inlet and flows out from the low-grade heat source outlet; low-grade heat sources include air sources, water sources and ground sources.

[0013] This utility model discloses a coordinated heating, cooling, and humidification control system based on heat pump technology and solution dehumidification coupling, which has a winter heating and humidification operation mode and a summer cooling and dehumidification operation mode. In the winter heating and humidification operation mode, the controller controls the first to third electric valves and the first to seventh three-way valves to operate as follows: the first and second electric valves are open, and the third electric valve is closed; the first port of the first three-way valve is open, the second port is closed, and the third port is open; the first port of the second three-way valve is open, the second port is closed, and the third port is open; the first port of the third three-way valve is open, the second port is closed, and the third port is open; the first port of the fourth three-way valve is open, the second port is closed, and the third port is open; the first port of the fifth three-way valve is open, the second port is open, and the third port is closed; the first port of the sixth three-way valve is closed, the second port is open, and the third port is open. The first port of the seventh three-way valve is open, the second port is closed, and the third port is open. In summer cooling and dehumidification operation mode, the controller controls the first to third electric valves and the first to seventh three-way valves to the summer operation mode: the first and second electric valves are closed, and the third electric valve is open; the first port of the first three-way valve is open, the second port is open, and the third port is closed; the first port of the second three-way valve is closed, the second port is open, and the third port is open; the first port of the third three-way valve is open, the second port is open, and the third port is closed; the first port of the fourth three-way valve is open, the second port is open, and the third port is closed; the first port of the fifth three-way valve is open, the second port is closed, and the third port is open; the first port of the sixth three-way valve is open, the second port is closed, and the third port is open; the first port of the seventh three-way valve is closed, the second port is open, and the third port is open.

[0014] Advantages of this utility model: (1) System integration and load coordination: Conventional systems require equipment to operate independently or in combination to meet functions such as cooling, heating, dehumidification and fresh air. Inevitably, waste heat is generated during the operation of a single device, resulting in low energy utilization efficiency. This system breaks through the limitations of traditional independent handling of cooling, heating and humidity loads, and incorporates the three types of loads into a unified energy network for overall control. Through integrated system design, cooling, heating and humidity are handled in coordination, which greatly improves energy utilization efficiency. Furthermore, it eliminates the need for traditional chiller units, boilers, independent dehumidifiers and humidifiers and related pipelines. The highly compact integrated design effectively reduces the equipment footprint.

[0015] (2) Cascade heat pump coupling and energy cascade utilization: Traditional condensation dehumidification or solution dehumidification systems generate a large amount of low-grade adsorption heat or condensation heat during the process. Since this grade of heat energy is difficult to use directly, most systems directly discard it into the environment through cooling towers, resulting in huge energy waste. By constructing a cascade heat pump coupled with solution dehumidification, the cascade heat pump can upgrade it to high-grade heat energy for solution regeneration, actively recover low-grade heat, and upgrade its energy level to convert it into usable medium and high temperature heat energy. This avoids relying on high-energy-consuming cooling towers to treat regeneration waste heat and eliminates the need for additional boilers to provide regeneration heat. The system realizes energy cascade utilization, and the overall comprehensive energy efficiency (including refrigeration, heating and dehumidification) is significantly higher than the sum of traditional independent systems, greatly improving energy utilization efficiency.

[0016] (3) Problems of system redundancy and high initial investment: In order to realize the functions of cooling, heating, dehumidification and fresh air, conventional systems require multiple independent systems such as chiller units, boilers, independent dehumidifiers and fresh air units. The equipment procurement cost is high, the area occupied is large, and the pipeline system is complex and intertwined, resulting in huge initial investment. This utility model significantly reduces the number of equipment and simplifies the pipeline through highly integrated design, thereby reducing the initial equipment investment and installation cost.

[0017] (4) Precise control and improved air quality: Traditional systems use coupled temperature and humidity control, which interferes with each other. Under partial load, especially when humidity changes greatly, it is difficult to control temperature and humidity accurately at the same time, which can easily lead to fluctuations in the indoor environment and a decrease in comfort. This utility model adopts an independent temperature and humidity control strategy. The solution dehumidification unit undertakes the latent heat load (wet load), and the heat pump unit is responsible for the sensible heat load (temperature control). This not only improves the control accuracy, but also completely avoids the energy waste of supercooling and reheating common in conventional systems. It realizes the decoupled control of temperature and humidity, and can independently and accurately adjust temperature and humidity, which significantly improves the stability and comfort of environmental control.

[0018] (5) Improve air quality: The damp surface of the condenser coil of traditional air conditioners is prone to the growth of bacteria and mold, which become a source of indoor air pollution and poses health risks. This utility model adopts solution dehumidification. The high-concentration salt solution has natural bactericidal and bacteriostatic properties, which helps to improve indoor air quality, achieve deep air purification, and provide a healthier indoor environment than traditional air conditioners. It improves energy efficiency while ensuring environmental comfort.

[0019] (6) The system has a modular structure, and the solution treatment module and the heat pump module can operate relatively independently, which enhances the flexibility and maintainability of the system. At the same time, the low-temperature stage of the heat pump has multi-heat source compatibility and can be adapted to various low-grade heat sources such as air source, water source, and ground source.

[0020] (7) Environmental protection and sustainability: The heat pump uses natural working fluid, and the solution dehumidification system uses environmentally friendly water-salt solution, which does not damage the ozone layer (ODP=0) and has an extremely low global warming potential (GWP), which is significantly better than traditional Freon refrigerants and meets the requirements of zero-carbon technology system under the "dual carbon" target.

[0021] The integrated design of this utility model not only simplifies the system structure, reduces equipment redundancy and initial investment costs, but also significantly reduces operating energy consumption through energy synergy optimization, providing an efficient, energy-saving and highly integrated innovative solution for building environment control. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the winter heating and humidification operation mode of the cold, heat and humidity coordinated control system based on heat pump technology and solution dehumidification coupling of this utility model; Figure 2 This is a schematic diagram of the summer cooling and dehumidification operation mode of the cold, heat and humidity coordinated control system based on heat pump technology and solution dehumidification coupling of this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] The cascade heat pump includes a high-temperature stage cycle and a low-temperature stage cycle. The low-temperature stage cycle outlet of the condenser-evaporator is connected to the first working fluid inlet of the evaporator via a first throttling valve. The first working fluid outlet of the evaporator is connected to the low-pressure side of the first compressor, and the high-pressure side of the first compressor is connected to the low-temperature stage cycle inlet of the condenser-evaporator, forming the low-temperature stage cycle. The first working fluid flows in the low-temperature stage cycle. The high-temperature stage cycle outlet of the condenser-evaporator is connected to the low-pressure side of the second compressor, and the high-pressure side of the second compressor is connected to the second working fluid inlet of the condenser. The second working fluid outlet of the condenser is connected to the high-temperature stage cycle inlet of the condenser-evaporator via a second throttling valve, forming the high-temperature stage cycle. The second working fluid flows in the high-temperature stage cycle.

[0025] like Figure 1 and 2 As shown, the cold, heat and humidity coordinated control system based on heat pump technology and solution dehumidification coupling in this embodiment includes: a cascade heat pump, a packed tower, first to third heat exchangers, a filter, a regenerator, first to seventh three-way valves, first to third electric valves, and a controller; wherein, the first to seventh three-way valves and the first to third electric valves are electrically connected to the controller. Fresh air flows into the air inlet of the packed tower, and the air outlet of the packed tower is connected to the first port of the first three-way valve via the third electric valve. The second port of the first three-way valve is connected to the air inlet of the first heat exchanger, and the third port of the first three-way valve is connected to the user end. The air outlet of the first heat exchanger is connected to the user end. The heat exchange medium outlet of the first heat exchanger is connected to the second port of the second three-way valve, the first port of the second three-way valve is connected to the low-grade heat source inlet, and the third port of the second three-way valve is connected to the heat exchange medium inlet of the evaporator; the heat exchange medium outlet of the evaporator is connected to the first port of the third three-way valve, the second port of the third three-way valve is connected to the heat exchange medium inlet of the first heat exchanger, and the third port of the third three-way valve is connected to the low-grade heat source outlet. The solution is sprayed inside the packed tower. The solution outlet of the packed tower is connected to the solution inlet of the condenser-evaporator through a filter. The solution outlet of the condenser-evaporator is connected to the first port of the fourth three-way valve. The third port of the fourth three-way valve is connected to the first port of the seventh three-way valve. The third port of the seventh three-way valve is connected to the solution inlet of the packed tower. The heat exchange medium outlet of the condenser is connected to the first port of the fifth three-way valve, the second port of the fifth three-way valve is connected to the heat exchange medium inlet of the second heat exchanger, and the heat exchange medium outlet of the second heat exchanger is connected to the second port of the sixth three-way valve; before the third electric valve, it is connected to the air inlet of the second heat exchanger through the second electric valve; the air outlet of the second heat exchanger is connected to the third electric valve after the first electric valve. The third port of the fifth three-way valve is connected to the heat exchanger inlet of the regenerator; the heat exchanger outlet of the regenerator is connected to the first port of the sixth three-way valve; the third port of the sixth three-way valve is connected to the heat exchanger inlet of the condenser. The second port of the fourth three-way valve is connected to the dilute solution inlet of the third heat exchanger, the dilute solution outlet of the third heat exchanger is connected to the solution inlet of the regenerator, the solution outlet of the regenerator is connected to the concentrated solution inlet of the third heat exchanger, and the concentrated solution outlet of the third heat exchanger is connected to the second port of the seventh three-way valve.

[0026] The various structures and the structures and valves are connected by pipes. In this embodiment, the first working fluid is carbon dioxide, and the second working fluid is HFO; the heat exchange working fluid is air or water; the solution is a high-concentration salt solution with a concentration of 40% to 45%; the first to third heat exchangers each have two sets of inlets and outlets, and the inlet and outlet of each set are connected by corresponding independent pipes. The two sets of pipes are not connected to each other, and only heat is exchanged between the working fluids; the low-grade heat sources include air sources, water sources, and ground sources.

[0027] Figure 1 and Figure 2 In the diagram, valves marked "Winter" indicate they are open in winter and closed in summer, while those marked "Summer" indicate they are open in summer and closed in winter. The flow of the primary working fluid, the secondary working fluid, the heat exchange fluid, and the low-grade heat source all fall under the category of energy flow.

[0028] The present invention provides a combined cold, heat and humidity control system based on heat pump technology and solution dehumidification coupling, which has a winter heating and humidification operation mode and a summer cooling and dehumidification operation mode. I. Winter heating and humidification operation mode: The controller controls the first to third electric valves and the first to seventh three-way valves to the winter operation mode: the first and second electric valves are open, and the third electric valve is closed; the first port of the first three-way valve is open, the second port is closed, and the third port is open; the first port of the second three-way valve is open, the second port is closed, and the third port is open; the first port of the third three-way valve is open, the second port is closed, and the third port is open; the first port of the fourth three-way valve is open, the second port is closed, and the third port is open; the first port of the fifth three-way valve is open, the second port is open, and the third port is closed; the first port of the sixth three-way valve is closed, the second port is open, and the third port is open; the first port of the seventh three-way valve is open, the second port is closed, and the third port is open. a) Airflow path: In winter, when indoor heating and humidification are required, the solution concentration in the packed tower is manually adjusted to zero, and the solution is sprayed inside the packed tower. The air in the packed tower comes into contact with the solution, humidifying the air. Outdoor fresh air or return air passes through the packed tower to absorb water vapor, then passes through the second electric valve and enters the second heat exchanger to absorb heat, raising the temperature to 35~45℃. The heated air passes through the first electric valve and then through the first three-way valve to be delivered to the user end to provide indoor heating. When indoor air does not require humidification, a bypass is set up next to the packed tower, and fresh air / return air passes directly through the bypass without entering the packed tower, or the packed tower is not filled with solution, thus the air is not humidified. Fresh air or return air is referred to as air. b) Humidification solution circulation path: The solution passes through the packed tower to transfer water vapor to the air, while the fresh air transfers some of the cooling energy to the solution, causing the solution temperature to drop by 5~10℃; after passing through the filter to remove impurities and dust, the solution enters the condenser-evaporator, where it absorbs the heat generated by the first compressor and its temperature rises by about 5~10℃; subsequently, the solution passes through the fourth three-way valve and the seventh three-way valve in sequence before returning to the packed tower, completing the solution circulation; c) Heat flow path within the system: Low-grade heat energy provided by the low-grade heat source enters the evaporator through the second three-way valve from the low-grade heat source inlet, transferring heat to the first working fluid. The low-grade heat energy, with its temperature reduced, is discharged from the low-grade heat source outlet. After being heated to 20~25℃ by the first compressor, it enters the condenser-evaporator. Through the condenser-evaporator, part of the heat is transferred to the solution to raise the solution temperature by 5~10℃, and another part of the heat is transferred to the high-temperature stage circulation. After being heated to above 70~80℃ by the second compressor, the second working fluid flows to the condenser. In the condenser, the second working fluid exchanges heat with the heat exchange working fluid. The heat exchange working fluid passes through the fifth three-way valve to the second heat exchanger, transferring heat to the air for heating, thus completing the heat flow. II. Summer Cooling and Dehumidification Operation Modes: The controller controls the first to third electric valves and the first to seventh three-way valves to the summer operating mode: the first and second electric valves are closed, and the third electric valve is open; the first port of the first three-way valve is open, the second port is open, and the third port is closed; the first port of the second three-way valve is closed, the second port is open, and the third port is open; the first port of the third three-way valve is open, the second port is open, and the third port is closed; the first port of the fourth three-way valve is open, the second port is open, and the third port is closed; the first port of the fifth three-way valve is open, the second port is closed, and the third port is open; the first port of the sixth three-way valve is open, the second port is closed, and the third port is open; the first port of the seventh three-way valve is closed, the second port is open, and the third port is open. a) Airflow path: Close the first and second electric valves and open the third electric valve; When indoor cooling and dehumidification are required in summer, fresh air / return air enters the packed tower to transfer the water vapor in the air to the solution, and then passes through the third electric valve to the first three-way valve and enters the first heat exchanger to transfer heat to the chilled water. The air temperature drops to 10~15℃ to meet the user's cooling load requirements. b) Humidifying solution circulation path: In summer, the solution concentration is adjusted to 35%~40% to form a concentrated solution as a dehumidifying solution to meet indoor dehumidification needs; the concentrated solution absorbs moisture from the air after passing through the packed tower, becoming a dilute solution of 30%~35%, while generating low-grade hygroscopic heat; the dilute solution passes through a filter to remove impurities and dust and then enters the condenser-evaporator, transferring the low-grade hygroscopic heat to the high-temperature stage circulation, reducing the solution temperature by 5~10℃; the lower-temperature dilute solution passes through the fourth three-way valve to the third heat exchanger to absorb the heat from the regenerated concentrated solution, increasing the temperature by 10~15℃; the higher-temperature dilute solution enters the regenerator to remove excess water, increasing the solution concentration to 40%~45%, becoming a high-temperature concentrated solution; the high-temperature concentrated solution enters the third heat exchanger, where the temperature drops to about 25℃, and then returns to the packed tower after passing through the seventh three-way valve, completing the circulation of the hygroscopic solution; c) Heat flow path within the system: Air passes through the first heat exchanger, transferring heat to the chilled water, which serves as the heat exchange medium. The chilled water temperature rises by 5-7°C. The heated chilled water flows through the second three-way valve to the evaporator in the low-temperature stage circulation, where it transfers heat to the first working medium. The first working medium is heated by the first compressor and enters the condenser-evaporator. The condenser-evaporator simultaneously transfers the heat from the first working medium and the low-grade hygroscopic heat from the dilute solution to the high-temperature stage circulation. After being compressed by the second compressor, the second working medium temperature is raised to 70-80°C before entering the condenser. The heat in the condenser passes through the fifth three-way valve to the regenerator for dilute solution regeneration. The regenerated high-temperature concentrated solution passes through the third heat exchanger, transferring heat to the dilute solution, thus completing the heat flow.

[0029] Finally, it should be noted that the purpose of disclosing the embodiments is to help further understand this utility model. However, those skilled in the art will understand that various substitutions and modifications are possible without departing from the spirit and scope of this utility model and the appended claims. Therefore, this utility model should not be limited to the content disclosed in the embodiments, and the scope of protection of this utility model is defined by the scope of the claims.

Claims

1. A coordinated control system for heat pump technology coupled with solution dehumidification, comprising a cascade heat pump, wherein the cascade heat pump includes a high-temperature stage cycle and a low-temperature stage cycle; wherein, The low-temperature stage circulation outlet of the condenser-evaporator is connected to the first working fluid inlet of the evaporator through a first throttling valve. The first working fluid outlet of the evaporator is connected to the low-pressure side of the first compressor, and the high-pressure side of the first compressor is connected to the low-temperature stage circulation inlet of the condenser-evaporator, forming a low-temperature stage circulation. The high-temperature stage circulation outlet of the condenser-evaporator is connected to the low-pressure side of the second compressor, and the high-pressure side of the second compressor is connected to the second working fluid inlet of the condenser. The second working fluid outlet of the condenser is connected to the high-temperature stage circulation inlet of the condenser-evaporator through a second throttling valve, forming a high-temperature stage circulation. The system is characterized in that the cold, heat, and humidity coordinated control system further includes: a packed tower, first to third heat exchangers, a filter, a regenerator, first to seventh three-way valves, first to third electric valves, and a controller; wherein the first to seventh three-way valves and the first to third electric valves are respectively connected to the controller. Fresh air flows into the air inlet of the packed tower, and the air outlet of the packed tower is connected to the first port of the first three-way valve via the third electric valve. The second port of the first three-way valve is connected to the air inlet of the first heat exchanger, and the third port of the first three-way valve is connected to the user end. The air outlet of the first heat exchanger is connected to the user end. The heat exchange medium outlet of the first heat exchanger is connected to the second port of the second three-way valve, the first port of the second three-way valve is connected to the inlet of the low-grade heat source, and the third port of the second three-way valve is connected to the heat exchange medium inlet of the evaporator; the heat exchange medium outlet of the evaporator is connected to the first port of the third three-way valve, the second port of the third three-way valve is connected to the heat exchange medium inlet of the first heat exchanger, and the third port of the third three-way valve is connected to the outlet of the low-grade heat source. The solution outlet of the packed tower is connected to the solution inlet of the condenser-evaporator through a filter. The solution outlet of the condenser-evaporator is connected to the first port of the fourth three-way valve. The third port of the fourth three-way valve is connected to the first port of the seventh three-way valve. The third port of the seventh three-way valve is connected to the solution inlet of the packed tower. The heat exchange medium outlet of the condenser is connected to the first port of the fifth three-way valve, the second port of the fifth three-way valve is connected to the heat exchange medium inlet of the second heat exchanger, and the heat exchange medium outlet of the second heat exchanger is connected to the second port of the sixth three-way valve; after the air outlet of the packed tower and before the third electric valve, it is connected to the air inlet of the second heat exchanger through the second electric valve; the air outlet of the second heat exchanger is connected to the third electric valve through the first electric valve. The third port of the fifth three-way valve is connected to the heat exchanger inlet of the regenerator; the heat exchanger outlet of the regenerator is connected to the first port of the sixth three-way valve; the third port of the sixth three-way valve is connected to the heat exchanger inlet of the condenser. The second port of the fourth three-way valve is connected to the dilute solution inlet of the third heat exchanger, the dilute solution outlet of the third heat exchanger is connected to the solution inlet of the regenerator, the solution outlet of the regenerator is connected to the concentrated solution inlet of the third heat exchanger, and the concentrated solution outlet of the third heat exchanger is connected to the second port of the seventh three-way valve.

2. The cold, heat, and humidity coordinated control system according to claim 1, characterized in that, The first working fluid flows in the cryogenic stage cycle, and the first working fluid is carbon dioxide.

3. The cold, heat, and humidity coordinated control system according to claim 1 or 2, characterized in that, The second working fluid flows in a high-temperature cycle, and the second working fluid is HFO or NH3.

4. The cold, heat, and humidity coordinated control system according to claim 1, characterized in that, A dehumidifying solution is sprayed inside the packed tower.

5. The cold, heat, and humidity coordinated control system according to claim 1, characterized in that, The heat exchange medium flows between the heat exchange medium inlet and the heat exchange medium outlet, and the heat exchange medium is air or water.

6. The cold, heat, and humidity coordinated control system according to claim 1, characterized in that, Low-grade heat energy provided by a low-grade heat source flows in from the low-grade heat source inlet and flows out from the low-grade heat source outlet; the low-grade heat source includes air source, water source and ground source.

7. The cold, heat, and humidity coordinated control system according to claim 1, characterized in that, The cold, heat and humidity coordinated control system has a winter heating and humidification operation mode and a summer cooling and dehumidification operation mode. In the winter heating and humidification operation mode, the controller controls the first to third electric valves and the first to seventh three-way valves to the winter operation mode. In the summer cooling and dehumidification operation mode, the controller controls the first to third electric valves and the first to seventh three-way valves to the summer operation mode.

8. The cold, heat, and humidity coordinated control system according to claim 7, characterized in that, The winter operation mode is as follows: the first and second electric valves are open, and the third electric valve is closed; the first port of the first three-way valve is open, the second port is closed, and the third port is open; the first port of the second three-way valve is open, the second port is closed, and the third port is open; the first port of the third three-way valve is open, the second port is closed, and the third port is open; the first port of the fourth three-way valve is open, the second port is closed, and the third port is open. The first port of the fifth three-way valve is open, the second port is open, and the third port is closed; the first port of the sixth three-way valve is closed, the second port is open, and the third port is open. The first port of the seventh three-way valve is open, the second port is closed, and the third port is open.

9. The cold, heat, and humidity coordinated control system according to claim 7, characterized in that, The summer operating mode is as follows: the first and second electric valves are closed, and the third electric valve is open; the first port of the first three-way valve is open, the second port is open, and the third port is closed; the first port of the second three-way valve is closed, the second port is open, and the third port is open; the first port of the third three-way valve is open, the second port is open, and the third port is closed; the first port of the fourth three-way valve is open, the second port is open, and the third port is closed; the first port of the fifth three-way valve is open, the second port is closed, and the third port is open; the first port of the sixth three-way valve is open, the second port is closed, and the third port is open. The first port of the seventh three-way valve is closed, the second port is open, and the third port is open.

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