CN101701737B - Heat-pump-driven solution dehumidifying air-conditioning device - Google Patents

Abstract

The invention provides a heat-pump-driven solution dehumidifying air-conditioning device, comprising a solution dehumidifying component, an air processing system component, a refrigerating component and a heat pump component; the solution dehumidifying component is formed by a solution pump, a heat pump condensing pipe, a one-level solution regenerator and a solution dehumidifying device which are connected; the air processing system component comprises an outdoor blower, an exhaust blower, an exhaust valve, a new blower, a new air valve, a water-air heat exchanger and an air conditioning room; in the refrigerating component, a refrigeration evaporator, a freezing water circulating pump and a freezing water adjusting valve are connected with the water-air heat exchanger to form freezing water circulation; a refrigerating compressor, a refrigerating condenser and a refrigerating throttling valve are connected with the refrigeration evaporator to form refrigerating circulation of a cold water unit. The heat pump component is formed by a heat pump compressor, a heat pump condenser, a heat pump throttling valve and a heat pump evaporator which are connected, wherein the heat pump evaporator is connected between the refrigerating compressor and the refrigerating condenser. The air-conditioning device improves the heat adsorption temperature of the heat pump evaporator and improves the heating efficiency.

Description

A solution dehumidification air conditioning device driven by a heat pump

technical field

The invention belongs to the field of air conditioning, and in particular relates to a solution dehumidification air conditioning device driven by a heat pump.

Background technique

With the development of society, the energy consumption of HVAC continues to increase. This depletes fossil energy sources and causes an environmental crisis on a global scale. The development of new high-efficiency refrigeration equipment and system optimization design has become an important direction to solve this problem. At present, air-conditioning devices with independent control of temperature and humidity based on solution dehumidification have been applied in practice.

As shown in Figure 1, such a device includes a solution dehumidification component, an air handling system component, a refrigeration component, and a heat pump component.

Solution dehumidification components include solution pump, heat pump condenser, primary solution regenerator and solution dehumidifier. The output end of the solution pump is connected to the first input end of the heat pump condenser, the first output end of the heat pump condenser is connected to the second input end of the primary solution regenerator, and the second output end of the primary solution regenerator is connected to the solution dehumidification The second input end of the dehumidifier is connected, and the second output end of the solution dehumidifier is connected with the input end of the solution pump.

Air handling system components, including outdoor air system components, exhaust system components and fresh air system components. Among them, the outdoor air system components include outdoor fans; the exhaust system components include exhaust fans and exhaust valves; the fresh air system components include fresh air fans, fresh air valves, water-air heat exchangers and air-conditioned rooms. The output end of the fresh air fan is connected to the input end of the fresh air valve, the output end of the fresh air valve is connected to the first input end of the solution dehumidifier in the solution dehumidification component, the first output end of the solution dehumidifier is connected to the water-air heat exchanger The first input end is connected, the first output end of the water-air heat exchanger is connected to the air-conditioned room, the air-conditioned room is connected to the input end of the exhaust fan at the same time, the output end of the exhaust fan is connected to the input end of the exhaust valve, and the exhaust valve The output terminal communicates with the external environment. The output end of the outdoor fan is connected to the first input end of the primary solution regenerator in the solution dehumidification assembly, and the first output end of the primary solution regenerator communicates with the external environment. Through the outdoor fan, the fresh air valve and the water-air heat exchanger, the air treatment system components are connected with the solution dehumidification components.

Refrigeration components, including refrigeration compressors, refrigeration condensers, refrigeration throttle valves, refrigeration evaporators, chilled water circulation pumps, water-air heat exchangers, and chilled water regulating valves. Wherein, the refrigeration condenser has a cooling water inlet and a cooling water outlet. The water-to-air heat exchanger in the refrigeration component is the same heat exchanger as the water-to-air heat exchanger in the air handling system component. Through water-air heat exchangers, refrigeration components and air handling system components are connected.

The refrigeration component has two working cycles, namely the chilled water cycle and the chiller refrigeration cycle. The chilled water cycle is connected by a refrigeration evaporator, a chilled water circulation pump, a chilled water regulating valve and a water-air heat exchanger. The output end of the chilled water circulation pump is connected to the input end of the chilled water regulating valve, the output end of the chilled water regulating valve is connected to the second input end of the water-air heat exchanger, and the second output end of the water-air heat exchanger is connected to the cooling The first input end of the evaporator is connected, and the first output end of the refrigeration evaporator is connected with the input end of the chilled water circulation pump. The refrigeration cycle of the chiller is composed of a refrigeration compressor, a refrigeration condenser, a refrigeration throttle valve and a refrigeration evaporator. The output end of the refrigeration compressor is connected to the first input end of the refrigeration condenser, the first output end of the refrigeration condenser is connected to the input end of the refrigeration throttle valve, and the output end of the refrigeration throttle valve is connected to the second input end of the refrigeration evaporator The second output end of the refrigeration evaporator is connected to the input end of the refrigeration compressor. Two working cycles share a refrigeration evaporator. The cooling water inlet and cooling water outlet on the refrigeration condenser are connected to the cooling tower.

Heat pump components, including heat pump compressor, heat pump condenser, heat pump throttle, and heat pump evaporator. The output end of the heat pump compressor is connected to the second input end of the heat pump condenser, the second output end of the heat pump condenser is connected to the input end of the heat pump throttle valve, and the output end of the heat pump throttle valve is connected to the second input end of the heat pump evaporator The second output end of the heat pump evaporator is connected to the input end of the heat pump compressor to form a circulation circuit. Wherein, the heat pump condenser in the heat pump component and the heat pump condenser in the solution dehumidification component are the same condenser.

The air conditioner with the above structure uses the hygroscopicity of the concentrated solution to deal with the humidity load of the air-conditioned room, so that the chiller only needs to bear the sensible heat load of the air-conditioned room, which increases the temperature of the chilled water supply; moreover, the solution dehumidification air-conditioning system can be driven by a low-temperature heat source, It can make full use of low-temperature waste heat, and has obvious energy-saving effect. Although the solution dehumidification air-conditioning system has many advantages, the traditional solution dehumidification air-conditioning system has not been widely used. The biggest defect of this device is: due to the limitation of the ambient temperature, the heat pump evaporator in the heat pump component absorbs heat from the environment at a low temperature, and the heat pump cycle efficiency is low.

Contents of the invention

The technical problem to be solved by the present invention is to provide a heat pump-driven solution dehumidification air-conditioning device to increase the temperature of heat absorbed by the heat pump evaporator in the heat pump assembly and improve heating efficiency.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A heat pump-driven solution dehumidification air-conditioning device, comprising a solution dehumidification component, an air handling system component, a refrigeration component and a heat pump component;

The solution dehumidification component is connected by a solution pump, a heat pump condenser, a primary solution regenerator and a solution dehumidifier;

The air handling system assembly includes an outdoor air system assembly, an exhaust system assembly and a fresh air system assembly; the outdoor air system assembly includes an outdoor fan; the exhaust system assembly includes an exhaust fan and an exhaust valve; the fresh air system assembly includes a fresh air blower, The fresh air valve, water-air heat exchanger and air-conditioned room; the connection between the fresh air blower and the solution dehumidifier in the solution dehumidification component, the connection between the outdoor fan and the primary solution regenerator in the solution dehumidification component; the connection between the exhaust fan and the exhaust valve, and The exhaust fan is connected with the air-conditioned room; the water-air heat exchanger is connected between the air-conditioned room and the solution dehumidifier in the solution dehumidification component;

The refrigeration assembly includes a refrigeration compressor, a refrigeration condenser, a refrigeration throttle valve, a refrigeration evaporator, a chilled water circulation pump, a water-air heat exchanger, and a chilled water regulating valve; the refrigeration condenser has a cooling water inlet and a cooling water The outlet, cooling water inlet and cooling water outlet are connected to the cooling tower; the water-air heat exchanger in the refrigeration component is the same heat exchanger as the water-air heat exchanger in the air handling system component; the refrigeration evaporator, refrigeration The water circulation pump, the chilled water regulating valve and the water-air heat exchanger are connected to form a chilled water cycle; the refrigeration compressor, the refrigeration condenser, the refrigeration throttle valve and the refrigeration evaporator are connected to form a chiller refrigeration cycle; the two cycles share a refrigeration evaporator;

The heat pump assembly is formed by connecting a heat pump compressor, a heat pump condenser, a heat pump throttle valve, and a heat pump evaporator; the heat pump assembly and the solution dehumidification assembly share a heat pump condenser; the heat pump evaporator in the heat pump assembly, Located between the refrigeration compressor and the refrigeration condenser in the refrigeration assembly.

As a first improvement: the exhaust system assembly also includes a first air heat exchanger, a second air heat exchanger, a secondary solution regenerator and a solution reheater; the exhaust fan, the exhaust valve, the first The air heat exchanger, the second air heat exchanger, the secondary solution regenerator and the solution reheater are connected in sequence; the solution reheater is also connected to the primary solution regenerator; the first air heat exchanger is also connected to the air Between the fresh air valve in the treatment system component and the solution dehumidifier in the solution dehumidification component; the second air heat exchanger is also connected to the end of the primary solution regenerator.

As the second improvement scheme: the solution dehumidification component also includes a solution heat exchanger, a dilute solution storage tank, a dilute solution pump, a concentrated solution storage tank, a secondary solution regenerator, a solution reheater, a concentrated solution regulating valve and a concentrated solution Solution pump; the solution pump, solution heat exchanger, dilute solution storage tank, dilute solution pump, heat pump condenser, primary solution regenerator, solution reheater, secondary solution regenerator, concentrated solution pump, solution The heat exchanger, concentrated solution storage tank, concentrated solution regulating valve, and solution dehumidifier are connected in sequence.

As a third improvement scheme: the solution dehumidification component also includes a solar photothermal converter and a dilute solution bypass valve; the dilute solution bypass valve is located between the dilute solution pump and the heat pump condenser; the solar photothermal converter is connected to the dilute solution Between the solution bypass valve and the primary solution regenerator.

Adopting a solution dehumidification air-conditioning device of the present invention has the following beneficial effects:

1. The present invention is based on the independent control of the temperature and humidity of the air conditioning system. Since the air treatment process does not need to use chilled water for dehumidification, the temperature of the chilled water can be raised to about 14°C, thereby improving the efficiency of the chiller. The heat pump evaporator is an evaporator in the heat pump assembly, but it is equivalent to a condenser in the refrigeration cycle of the chiller. In this way, two condensers are arranged at the outlet of the refrigeration compressor. The heat pump evaporator transfers the heat of vapor cooling and condensation to the heat pump. This technology increases the temperature of the cold source of the heat pump, thereby improving the energy efficiency ratio of the heat pump.

2. In the air treatment assembly of the present invention, the fresh air assembly can recover the sensible cooling capacity in the exhaust air through the first air heat exchanger, and can reach the required humidity through the two-stage regenerator, and reduce the concentration of the hygroscopic solution; the exhaust air assembly can Recover the full heat of the exhaust air. This helps the system save energy.

3. The solution dehumidification component of the present invention adopts a two-stage regeneration plus reheating method, which can recover the latent heat in the exhaust air. The outdoor air is used to realize the primary regeneration of the dehumidification solution, and the temperature of the exhaust air is raised to increase the concentration of the solution to realize the secondary regeneration. Increase the concentration difference of the dehumidification solution circulation, and after the concentration of the solution increases, increase the storage energy per unit volume;

4. The solution dehumidification component of the present invention adopts a two-stage dehumidification plus intermediate cooling method, which can increase the concentration difference of the solution circulation and increase the energy efficiency ratio of the moisture absorption system.

5. The solution dehumidification component of the present invention is equipped with a solar photothermal converter. When the solar energy is sufficient, store part of the energy in the concentrated solution storage tank; when the solar energy is weak, adjust the opening of the bypass three-way valve to make the regenerated heat meet the requirements.

Description of drawings

Fig. 1 is a system flow diagram of a conventional solution desiccant air-conditioning device described in the background art.

Fig. 2 is a system flow chart of the air conditioner of the present invention.

Fig. 3 is a system flow chart of the improvement scheme I of the air conditioning device of the present invention.

Fig. 4 is a system flow chart of the improvement II of the air conditioning device of the present invention.

Fig. 5 is a system flow chart of improvement III of the air conditioner of the present invention.

Fig. 6 is a working principle diagram of improvement III of the air conditioner of the present invention.

In the figure, 1. Fresh fan; 2. Solution dehumidifier; 3. Water-air heat exchanger; 4. Air-conditioned room; 5. Exhaust fan; 6. Solution pump; 7. Solar thermal converter; 8. Level one Solution regenerator; 9. Outdoor fan; 10. Refrigeration evaporator; 11. Chilled water circulation pump; 12. Chilled water regulating valve; 13. Refrigeration compressor; 14. Refrigeration condenser; 14a. Cooling water inlet; 14b. Cooling water Outlet; 15. Refrigeration throttle valve; 16. Heat pump evaporator; 17. Heat pump compressor; 18. Heat pump condenser; 19. Heat pump throttle valve; 20. Exhaust valve; 21. First air heat exchanger; 22 23. Secondary solution regenerator; 24. Solution reheater; 25. Fresh air valve; 26. Solution heat exchanger; 27. Dilute solution storage tank; 28. Dilute solution pump; 29 , Concentrated solution pump; 30, Concentrated solution storage tank; 31, Concentrated solution regulating valve; 32, Concentrated solution bypass valve; 33, Dilute solution bypass valve.

Detailed ways

As shown in FIG. 2 , the solution dehumidification air-conditioning device of the present invention includes a solution dehumidification component, an air treatment system component, a refrigeration component and a heat pump component.

Air handling system components, including outdoor air system components, exhaust system components and fresh air system components. Among them, the outdoor air system components include an outdoor fan 9; the exhaust system components include an exhaust fan 5 and an exhaust valve 20; The output end of the fresh air blower 1 is connected to the input end of the fresh air valve 25, the output end of the fresh air valve 25 is connected to the first input end of the solution dehumidifier 2 in the solution dehumidification assembly, and the first output end of the solution dehumidifier 2 is connected to the water- The first input end of the air heat exchanger 3 is connected, the first output end of the water-air heat exchanger 3 is connected with the air-conditioned room 4, and the air-conditioned room 4 is connected with the input end of the exhaust fan 5 at the same time, and the output end of the exhaust fan 5 is connected with the air-conditioned room 4. The input end of the exhaust valve 20 is connected, and the output end of the exhaust valve 20 communicates with the external environment. The output end of the outdoor fan 9 is connected to the first input end of the primary solution regenerator 8 in the solution dehumidification assembly, and the first output end of the primary solution regenerator 8 communicates with the external environment. Through the outdoor fan 9, the fresh air valve 25 and the water-air heat exchanger 3, the air treatment system components are connected with the solution dehumidification components.

As shown in FIG. 2 and FIG. 6 , the working principle of the air treatment system components is: the outdoor fan 9 sends air into the primary solution regenerator 8 . The air absorbs the moisture in the high-temperature dilute solution in the primary solution regenerator 8 . Fresh air blower 1 sends outdoor fresh air into solution dehumidifier 2 . The concentrated solution in the solution dehumidifier 2 absorbs the moisture in the fresh air to reduce the moisture content of the fresh air. The fresh air coming out of the solution dehumidifier 2 enters the water-air heat exchanger 3 and exchanges heat with the low-temperature chilled water in the refrigeration cycle to reduce the air temperature. After the cooled air is discharged from the water-air heat exchanger 3, it enters the air-conditioned room 4.

The refrigeration assembly includes a refrigeration compressor 13 , a heat pump evaporator 16 , a refrigeration condenser 14 , a refrigeration throttle valve 15 , a refrigeration evaporator 10 , a chilled water circulation pump 11 , a water-air heat exchanger 3 and a chilled water regulating valve 12 . Wherein, the refrigeration condenser 14 has a cooling water inlet 14a and a cooling water outlet 14b. The water-air heat exchanger 3 in the refrigeration assembly is the same heat exchanger as the water-air heat exchanger 3 in the air handling system assembly. Through the water-air heat exchanger 3, the refrigeration component and the air handling system component are connected.

The refrigeration component has two working cycles, namely the chilled water cycle and the chiller refrigeration cycle. The chilled water cycle is formed by connecting a refrigeration evaporator 10 , a chilled water circulation pump 11 , a chilled water regulating valve 12 and a water-air heat exchanger 3 . The output end of the chilled water circulation pump 11 is connected to the input end of the chilled water regulating valve 12, the output end of the chilled water regulating valve 12 is connected to the second input end of the water-air heat exchanger 3, and the second input end of the water-air heat exchanger 3 The two output ends are connected to the first input end of the refrigeration evaporator 10 , and the first output end of the refrigeration evaporator 10 is connected to the input end of the chilled water circulation pump 11 . The refrigerating cycle of the chiller is formed by connecting a refrigerating compressor 13 , a heat pump evaporator 16 , a refrigerating condenser 14 , a refrigerating throttle valve 15 and a refrigerating evaporator 10 . The output end of the refrigeration compressor 13 is connected to the first input end of the heat pump evaporator 16, the first output end of the heat pump evaporator 16 is connected to the first input end of the refrigeration condenser 14, and the first output end of the refrigeration condenser 14 is connected to the first input end of the refrigeration condenser 14. The input end of the refrigeration throttle valve 15 is connected, the output end of the refrigeration throttle valve 15 is connected with the second input end of the refrigeration evaporator 10 , the second output end of the refrigeration evaporator 10 is connected with the input end of the refrigeration compressor 13 . Two working cycles share one refrigeration evaporator 10 . The cooling water inlet 14a and cooling water outlet 14b on the refrigeration condenser 14 are connected on the cooling tower.

As shown in Fig. 2 and Fig. 6, the working principle of the refrigeration assembly is as follows: firstly, in the refrigeration cycle of the water chiller, the high-temperature refrigerant vapor from the refrigeration compressor 13 is cooled in the heat pump evaporator 16 and partially condensed. In the heat pump evaporator 16, the refrigerant transfers heat to the refrigerant in the heat pump assembly, and then enters the refrigeration condenser 14 for complete cooling. At this time, through the cooling water inlet 14a, the cooling liquid in the cooling tower flows into the refrigeration condenser 14, absorbs the heat of the refrigerant, and then flows back into the cooling tower through the cooling water outlet 14b. The refrigerant is completely cooled in the refrigeration condenser 14 and a certain degree of subcooling is generated. The subcooled refrigerant enters the refrigeration evaporator 10 through the refrigeration throttling valve 15 . In the refrigeration evaporator 10 , the refrigerant evaporates by absorbing the heat of the chilled water in the chilled water cycle, and the completely evaporated refrigerant returns to the refrigeration compressor 13 . This is how the refrigerant circulates in the refrigeration cycle of the chiller. In the refrigeration evaporator 10 , the chilled water is absorbed by the refrigerant, the temperature drops to about 14° C., and then enters the chilled water circulating pump 11 . Adjusted by the chilled water regulating valve 12, the air-conditioning chilled water is delivered from the chilled water circulation pump 11 to the water-air heat exchanger 3, so that the fresh air flowing through the water-air heat exchanger 3 in the fresh air component cools down, while the chilled water temperature rises. The heated chilled water flows into the refrigeration evaporator 10 again. The chilled water circulates in this way to reduce the fresh air temperature.

The solution dehumidification component includes a solution pump 6 , a heat pump condenser 18 , a primary solution regenerator 8 and a solution dehumidifier 2 . The output end of the solution pump 6 is connected to the first input end of the heat pump condenser 18, the first output end of the heat pump condenser 18 is connected to the second input end of the primary solution regenerator 8, and the second input end of the primary solution regenerator 8 The output end is connected to the second input end of the solution dehumidifier 2 , and the second output end of the solution dehumidifier 2 is connected to the input end of the solution pump 6 .

As shown in Figure 2 and Figure 6, the working principle of the solution dehumidification component is: the concentrated solution absorbs moisture in the fresh air in the solution dehumidifier 2, and the concentration of the solution decreases. Through the solution pump 6, the solution is sent to the heat pump condenser 18 for heating. After the temperature of the solution rises, it enters the primary solution regenerator 8 . In the primary solution regenerator 8, the outdoor air takes away the moisture in the solution, so that the solution is concentrated. The concentrated solution enters the solution dehumidifier 2. This is how the solution circulates through the solution dehumidification system.

The heat pump assembly includes a heat pump compressor 17 , a heat pump condenser 18 , a heat pump throttle valve 19 and a heat pump evaporator 16 . The output end of the heat pump compressor 17 is connected to the second input end of the heat pump condenser 18, the second output end of the heat pump condenser 18 is connected to the input end of the heat pump throttle valve 19, and the output end of the heat pump throttle valve 19 is connected to the heat pump evaporation The second input end of the heat pump evaporator 16 is connected, and the second output end of the heat pump evaporator 16 is connected with the input end of the heat pump compressor 17 to form a circulation circuit. Wherein, the heat pump condenser 18 in the heat pump assembly and the heat pump condenser 18 in the solution dehumidification assembly are the same condenser. The heat pump evaporator 16 in the heat pump assembly and the heat pump evaporator 16 in the refrigeration cycle of the chiller are the same evaporator.

As shown in Fig. 2 and Fig. 6, the working principle of the heat pump assembly is: the high-temperature refrigerant coming out of the heat pump compressor 17 is condensed in the heat pump condenser 18, and the condenser adopts a reverse flow form. At this time, the refrigerant heats the low-temperature dilute solution flowing through the heat pump condenser 18 in the solution dehumidification component, raising the temperature of the dilute solution to 70-80°C. The condensed refrigerant passes through the heat pump throttle valve 19 and enters the heat pump evaporator 16 after decompression, absorbs the heat of the refrigerant flowing through the heat pump evaporator 16 in the refrigeration cycle of the chiller, and enters the heat pump compressor 17 after evaporation. In the heat pump assembly, the heat pump evaporator 16 is equivalent to the cold source of the heat pump assembly, and its temperature is 45-55°C. This is how the refrigerant circulates through the heat pump components, raising the temperature of the dilute solution and lowering the temperature of the refrigerant in the chiller's refrigeration cycle.

In a traditional chiller refrigeration cycle, a cooling tower rejects the heat of condensation to the environment. The temperature of this part of the discharged heat is higher than that of the environment, so the part of heat can be fully utilized by connecting the heat pump evaporator 16 in the refrigeration cycle of the water chiller to absorb this part of heat and transfer it to the heat pump system. Compared with the traditional heat pump system, the temperature of the heat pump cold source in the heat pump system of the present invention is higher, so the heating efficiency of the system is high, and the excess heat in the chiller can be recycled to avoid discharge to the environment.

Improvement plan I:

The air conditioner of the above technical solution connects the heat pump evaporator 16 in the common heat pump assembly to the refrigeration cycle of the water chiller to increase the condensation heat temperature in the refrigeration assembly, thereby improving the overall efficiency of the air conditioner. In addition, improving the exhaust system components can further improve the overall efficiency of the air conditioning unit.

As shown in Figure 3, the exhaust system assembly, in addition to comprising the exhaust fan 5 and the exhaust valve 20, also includes a first air heat exchanger 21, a second air heat exchanger 22, a secondary solution regenerator 23 and a solution reheating device 24. Wherein, the first air heat exchanger 21 is simultaneously connected between the fresh air valve 25 in the air treatment system component and the solution dehumidifier 2 in the solution dehumidification component. The second air heat exchanger 22 is connected to the end of the primary solution regenerator 8 . The output end of the exhaust fan 5 is connected to the input end of the exhaust valve 20, the output end of the exhaust valve 20 is connected to the first input end of the first air heat exchanger 21, and the first output end of the first air heat exchanger 21 It is connected with the first input end of the second air heat exchanger 22, the first output end of the second air heat exchanger 22 is connected with the first input end of the secondary solution regenerator 23, and the first input end of the secondary solution regenerator 23 The output end communicates with the external environment. The input end of the solution reheater 24 is connected with the second output end of the primary solution regenerator 8, the output end of the solution reheater 24 is connected with the second input end of the secondary solution regenerator 23, and the secondary solution regenerator 23 The second output end of is connected with the second input end of solution dehumidifier 2. The second input end of the first air heat exchanger 21 is connected to the output end of the fresh air valve 25 , and the second output end of the first air heat exchanger 21 is connected to the first input end of the solution dehumidifier 2 . The second input end of the second air heat exchanger 22 is connected to the first output end of the primary solution regenerator 8 . The second output end of the second air heat exchanger 22 communicates with the external environment.

As shown in Figure 3 and Figure 6, the working principle of the improved exhaust system assembly is: in the exhaust system assembly, after the exhaust air flows through the exhaust fan 5 and the exhaust valve 20, it is combined with the exhaust air in the first air heat exchanger 21 The fresh air input by the fresh air blower 1 in the fresh air system component exchanges heat, and then enters the second air heat exchanger 22, and the temperature rises after heat exchange with the high-temperature outdoor air input from the outdoor blower 9 and passed through the primary solution regenerator 8, At this time, the exhaust air has strong hygroscopicity, and the water vapor in the solution is absorbed by the secondary solution regenerator 23 and discharged into the atmosphere.

The exhaust air temperature and moisture content of the air conditioner are small, and the improvement plan I realizes the recovery of sensible cooling through fresh air, and at the same time increases the temperature of the exhaust air. The recovery of latent heat is realized through the secondary solution regenerator 23 , that is, the high dehumidification capacity of the exhaust air is used to further concentrate the concentrated solution after the primary regeneration. At the same time, the outdoor air transfers heat to the exhaust air by exchanging heat with the exhaust air, increasing the exhaust air temperature, enhancing the moisture absorption capacity of the exhaust air, and helping to improve the energy efficiency ratio of the solution dehumidification cycle.

Improvement plan II:

While improving the exhaust system components in the improvement scheme I, the liquid storage tank can be added to enhance the practicability of the solution dehumidification components.

As shown in Figure 4, the solution dehumidification assembly, in addition to including the primary solution regenerator 8, heat pump condenser 18, solution pump 6 and solution dehumidifier 2, also includes a solution heat exchanger 26, a diluted solution storage tank 27, a diluted solution Pump 28 , solution reheater 24 , concentrated solution storage tank 30 , secondary solution regenerator 23 , concentrated solution regulating valve 31 and concentrated solution pump 29 . The output end of the solution pump 6 is connected with the first input end of the solution heat exchanger 26, the first output end of the solution heat exchanger 26 is connected with the input end of the dilute solution liquid storage tank 27, and the output end of the dilute solution liquid storage tank 27 It is connected with the input end of the dilute solution pump 28, the output end of the dilute solution pump 28 is connected with the first input end of the heat pump condenser 18, the first output end of the heat pump condenser 18 is connected with the second input end of the primary solution regenerator 8 connection, the second output of the primary solution regenerator 8 is connected to the input of the solution reheater 24, the output of the solution reheater 24 is connected to the second input of the secondary solution regenerator 23, and the secondary solution is regenerated The second output end of the device 23 is connected with the input end of the concentrated solution pump 29, the output end of the concentrated solution pump 29 is connected with the second input end of the solution heat exchanger 26, and the second output end of the solution heat exchanger 26 is connected with the concentrated solution The input end of the liquid storage tank 30 is connected, the output end of the concentrated solution liquid storage tank 30 is connected with the input end of the concentrated solution regulating valve 31, the output end of the concentrated solution regulating valve 31 is connected with the second input end of the solution dehumidifier 2, and the solution The second output end of the dehumidifier 2 is connected to the input end of the solution pump 6 to form a circulation circuit.

As shown in Figure 4 and Figure 6, the working principle of the solution dehumidification component is: the low-temperature dilute solution flows out of the dilute solution storage tank 27, passes through the dilute solution pump 28, and enters the heat pump condenser 18 to absorb the condensation heat of the refrigerant , become a high-temperature dilute solution, and then enter the primary solution regenerator 8. At this time, the dilute solution and outdoor air perform heat and mass exchange in the primary solution regenerator 8, and the regenerated concentrated solution is heated by the solution reheater 24 , into the secondary solution regenerator 23. In the secondary solution regenerator 23, the concentrated solution utilizes high-temperature exhaust to further increase the concentration of the dehumidification solution. The high-temperature and high-concentration dehumidification solution passes through the solution heat exchanger 26 to transfer heat to the low-temperature dilute solution, and then enters the concentrated solution storage tank 30 . Through the adjustment of the concentrated solution regulating valve 31, the low-temperature concentrated solution enters the solution dehumidifier 2 and absorbs water vapor in the fresh air to achieve the purpose of dehumidification. The dehumidification solution after moisture absorption is heated by the solution heat exchanger 26, then enters the dilute solution storage tank 27, and then is sent to the heat pump condenser 18 by the dilute solution pump 28 to heat up, and thus circulates.

In the improvement scheme II, the solution concentrated by the secondary solution regenerator 29 can also be directly supplied to the solution dehumidifier 2 . A concentrated solution bypass valve 32 is installed between the solution heat exchanger 26 and the concentrated solution storage tank 30 . The input end of the concentrated solution bypass valve 32 is connected with the second output end of the solution heat exchanger 26; the first output end of the concentrated solution bypass valve 32 is connected with the input end of the concentrated solution liquid storage tank 30; the concentrated solution bypass valve The second output end of 32 is connected with the second input end of solution dehumidifier 2 . In this way, when there is too much concentrated solution, adjust the concentrated solution bypass valve 32 to connect the pipeline to the concentrated solution liquid storage tank 30 , and the concentrated solution flows into the concentrated solution liquid storage tank 30 . When needed, the concentrated solution regulating valve 31 is opened, and the concentrated solution flows from the concentrated solution storage tank 30 to the solution dehumidifier 2 . When the concentrated solution is in an appropriate amount, adjust the concentrated solution bypass valve 32 to connect the pipeline to the solution dehumidifier 2 . In this way, the concentrated solution flows directly to the solution dehumidifier 2 , saving the intermediate steps of the concentrated solution flowing through the concentrated solution storage tank 30 and the concentrated solution regulating valve 31 .

Technical solution III

In the technical scheme II, the solution regeneration energy of the component is provided by a high-temperature heat pump, and the solar light-to-heat converter 7 can be used to heat the solution when the sun is sufficient.

As shown in FIG. 5 , a dilute solution bypass valve 33 is installed between the dilute solution pump 28 and the heat pump condenser 18 . Dilute solution bypass valve 33 is a bypass three-way valve. The input end of the dilute solution bypass valve 33 is connected with the output end of the dilute solution pump 28 . The first output end of the dilute solution bypass valve 33 is connected to the input end of the solar photothermal converter 7 , and the output end of the solar photothermal converter 7 is connected to the second input end of the primary solution regenerator 8 . The second output end of the dilute solution bypass valve 33 is connected to the first input end of the heat pump condenser 18 , and the first output end of the heat pump condenser 18 is connected to the second input end of the primary solution regenerator 8 . In this way, the solar photothermal converter 7 and the heat pump condenser 18 are connected in parallel. By adjusting the dilute solution bypass valve 33, the flow direction of the dilute solution can be controlled. When the outdoor solar energy is sufficient, the dilute solution bypass valve 33 is adjusted to allow the dilute solution to flow through the solar photothermal converter 7 . In this way, all the low-temperature dilute solution passes through the solar photothermal converter 7 to raise the temperature of the solution to 70-80° C., and then enters the primary solution regenerator 8 . When the outdoor solar energy is insufficient, adjust the dilute solution bypass valve 33 to make the dilute solution flow into the heat pump condenser 18, be heated to 70-80°C by the high-temperature heat pump assembly, and then enter the primary solution regenerator 8 .

Claims (5)

1. a heat pump driven solution dehumidifying air-conditioning device comprises solution dehumidification assembly, air treatment system assembly, cooling assembly and heat pump components;

Described solution dehumidification assembly is formed by connecting by solution pump (6), heat pump condenser (18), one-level solution regenerator (8) and solution moisture removing device (2);

Described air treatment system assembly comprises outdoor air system component, exhaust system assembly and VMC assembly; The outdoor air system component comprises outdoor fan (9); The exhaust system assembly comprises exhaust blower (5) and exhaust valve (20); The VMC assembly comprises new blower fan (1), new air-valve (25), water-air heat exchanger (3) and air-conditioned room (4); New blower fan (1) is connected with solution moisture removing device (2) in the solution dehumidification assembly, and outdoor fan (9) is connected with one-level solution regenerator (8) in the solution dehumidification assembly; Exhaust blower (5) is connected with exhaust valve (20), and this exhaust blower (5) is connected with air-conditioned room (4); Water-air heat exchanger (3) is connected in air-conditioned room (4) and the solution dehumidification assembly between the solution moisture removing device (2);

Described cooling assembly comprises refrigeration compressor (13), refrigerant condenser (14), refrigeration choke valve (15), refrigerating evaporator (10), chilled water circulating pump (11), water-air heat exchanger (3) and chilled water control valve (12); Refrigerant condenser (14) has cooling water inlet (14a) and coolant outlet (14b), and cooling water inlet (14a) and coolant outlet (14b) are connected on the cooling tower; Water-air heat exchanger (3) in water-air heat exchanger in the cooling assembly (3) and the air treatment system assembly is same heat exchanger; Refrigerating evaporator (10), chilled water circulating pump (11), chilled water control valve (12) and water-air heat exchanger (3) are connected, and form the chilled water circulation; Refrigeration compressor (13), refrigerant condenser (14), refrigeration choke valve (15) are connected with refrigerating evaporator (10), form the handpiece Water Chilling Units kind of refrigeration cycle; Described refrigerating evaporators of two cycle sharings (10);

Described heat pump components is formed by connecting by heat pump compressor (17), heat pump condenser (18), heat pump choke valve (19) and evaporator with heat pump (16); The shared heat pump condenser of heat pump components and solution dehumidification assembly (18);

It is characterized in that the evaporator with heat pump in the described heat pump components (16) is arranged between the refrigeration compressor (13) and refrigerant condenser (14) of cooling assembly.

2. according to the described solution dehumidifying air-conditioning device of claim 1, it is characterized in that described exhaust system assembly also comprises first air heat exchanger (21), second air heat exchanger (22), secondary solution regenerator (23); Described exhaust blower (5), exhaust valve (20), first air heat exchanger (21), second air heat exchanger (22), secondary solution regenerator (23) connect successively; Wherein, first air heat exchanger (21) also is connected between the new air-valve (25) and the solution moisture removing device (2) in the solution dehumidification assembly in the air treatment system assembly; Second air heat exchanger (22) also is connected the end of one-level solution regenerator (8).

3. according to the described solution dehumidifying air-conditioning device of claim 2, it is characterized in that, described solution dehumidification assembly also comprises solution heat exchanger (26), weak solution fluid reservoir (27), weak solution pump (28), concentrated solution fluid reservoir (30), secondary solution regenerator (23), solution reheater (24), concentrated solution control valve (31) and concentrated solution pump (29); Described solution pump (6), solution heat exchanger (26), weak solution fluid reservoir (27), weak solution pump (28), heat pump condenser (18), one-level solution regenerator (8), solution reheater (24), secondary solution regenerator (23), concentrated solution pump (29), solution heat exchanger (26), concentrated solution fluid reservoir (30), concentrated solution control valve (31), solution moisture removing device (2) connect successively.

4. according to the described solution dehumidifying air-conditioning device of claim 3, it is characterized in that described solution dehumidification assembly also comprises concentrated solution by-passing valve (32); This concentrated solution by-passing valve (32) is positioned between solution heat exchanger (26) and the concentrated solution fluid reservoir (30), and is connected with the output of concentrated solution control valve (31).

5. according to each described solution dehumidifying air-conditioning device in the claim 1 to 4, it is characterized in that described solution dehumidification assembly also comprises solar energy photothermal converter (7) and weak solution by-passing valve (33); This weak solution by-passing valve (33) is positioned between weak solution pump (28) and the heat pump condenser (18); This solar energy photothermal converter (7) is connected between weak solution by-passing valve (33) and the one-level solution regenerator (8).

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