Triple co-generation unit adopting heat source tower

Abstract

The triple co-generation unit adopting the heat source tower comprises a refrigerating system, a spraying system, an evaporation cold heat exchange system, an exhaust fan and a shell, and is characterized in that the refrigerating system is a single cold system and comprises a compressor, a double-cold-source condenser, a double-heat-source evaporator and a throttler, and the evaporation cold heat exchange system comprises an evaporation cold heat exchanger and a circulating water pump. The refrigerating system, the spraying system and the evaporation cold heat exchange system are installed in the shell, a supporting frame is arranged in the shell, and the unit can achieve five cooling modes of evaporation cold, air cooling, water cooling, evaporation cold and water cooling mixed cooling and air cooling and water cooling mixed cooling through valve conversion. The air-conditioning chilled water, air-conditioning hot water and domestic hot water can be manufactured independently, various energy sources are fully utilized, the energy-saving and emission-reducing effects are remarkable, a refrigerating system is simplified, the operation reliability is improved, the unit structure is compact, the occupied area is small, a refrigerating machine room is not needed, the cost is reduced, and the air-conditioning chilled water and domestic hot water can be manufactured at the same time. And the frosting risk is also reduced by utilizing the heat source tower.

Description

Technical Field

[0001] The utility model belongs to the field of air conditioning and refrigeration, and in particular relates to a trigeneration unit adopting a heat source tower. Background Art

[0002] Evaporative cooling has high heat exchange efficiency and is widely used in heat source towers. At present, trigeneration units often use heat source towers to improve heat exchange efficiency. However, the refrigeration system of the trigeneration unit often uses a heat pump system, which uses a four-way reversing valve, solenoid valve, and one-way valve to convert the operating conditions. In this way, the refrigeration system has too many valves, is prone to leakage, and has reduced reliability. Summary of the invention

[0003] The utility model aims to provide a trigeneration unit adopting a heat source tower with fewer refrigeration system valves and a simple structure.

[0004] The solution of the utility model is: a trigeneration unit using a heat source tower, which includes a refrigeration system, a spray system, an evaporative cooling heat exchange system, an exhaust fan, and a shell. The refrigeration system is a single cooling system, which includes a compressor, a dual cold source condenser, a dual heat source evaporator, and a throttle. The dual cold source condenser includes a hot water heat exchanger and a cooling water heat exchanger. The dual cold source evaporator includes a chilled water heat exchanger and a heat source water heat exchanger; the spray system includes a circulating water pump, a nozzle, and a water collecting tank; the evaporative cooling heat exchange system includes an evaporative cooling heat exchanger and a circulating water pump. The refrigeration system, the spray system, and the evaporative cooling heat exchange system are installed in the shell, which has a supporting frame inside. The exhaust fan is installed above the shell, the spray pipe and the nozzle are below the exhaust fan, the evaporative cooling heat exchanger is installed below the nozzle, the water collecting tank is installed below the evaporative cooling heat exchanger, and the compressor, the dual cold source condenser, the dual heat source evaporator, and the circulating water pump are installed below the water collecting tank. The cooling water heat exchanger inlet and outlet pipes of the dual cold source condenser, the heat source water heat exchanger inlet and outlet pipes of the dual heat source evaporator, the spray system, the evaporative cooling heat exchange system, and the external water source are connected to each other. The cooling water heat exchanger of the dual cold source condenser is also connected to the air conditioning heating system, its hot water heat exchanger is connected to the domestic hot water system, and the chilled water heat exchanger of the dual cold source evaporator is connected to the air conditioning chilled water system. The hot water heat exchanger, cooling water heat exchanger of the dual cold source condenser and the chilled water heat exchanger and heat source water heat exchanger of the dual cold source evaporator are mixed, parallel, and series connected relative to the refrigerant.

[0005] When the unit produces air-conditioning chilled water alone, the evaporative heat exchanger uses five cooling methods: evaporative cooling, air cooling, water cooling, mixed cooling of evaporative cooling and water cooling, and mixed cooling of air cooling and water cooling to discharge the condensation heat of the refrigerant. The refrigerant circulation process is: compressor → dual cold source condenser → liquid receiver → dry filter → liquid indicator mirror → throttle → dual heat source evaporator → gas-liquid separator → compressor.

[0006] When evaporative cooling is adopted, the exhaust fan, the circulating water pump of the spray system and the circulating water pump of the evaporative heat exchange system are started, and the spray water circulation process is: water collecting tank → circulating water pump → nozzle → evaporative heat exchanger → water collecting tank, and the cooling water circulation process is: cooling water heat exchanger of the dual cold source condenser → circulating water pump → evaporative heat exchanger → cooling water heat exchanger of the dual cold source condenser. The cooling water is heated by the high-temperature and high-pressure gaseous refrigerant in the cooling water heat exchanger of the dual cold source condenser, and then enters the evaporative heat exchanger. The spray water is sprayed on the surface of the evaporative heat exchanger. Through evaporative cooling heat exchange, the cooling water is cooled, and the condensation heat of the refrigerant is finally discharged into the atmosphere by the exhaust fan. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator to provide chilled water for the air conditioning system.

[0007] When air cooling is used, the exhaust fan and the circulating water pump of the evaporative heat exchange system are started, and the spray system does not work. The cooling water circulation process is the same as above. The cooling water is heated by the high-temperature and high-pressure gaseous refrigerant in the cooling water heat exchanger of the dual-cold source condenser, and then enters the evaporative heat exchanger to exchange heat with the air. The cooling water is cooled, and the refrigerant condensation heat is finally discharged into the atmosphere by the exhaust fan. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual-cold source evaporator to provide chilled water for the air-conditioning system.

[0008] When water cooling is used, the exhaust fan, the circulating water pump of the spray system, and the circulating water pump of the evaporative heat exchange system do not work, the external water source is connected to the evaporative heat exchange system, the cooling water enters the cooling water heat exchanger of the dual cold source condenser, exchanges heat with the high-temperature and high-pressure gaseous refrigerant, and discharges the condensation heat of the refrigerant into the external water source. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator to provide chilled water for the air-conditioning system.

[0009] When mixed cooling of evaporative cooling and water cooling is adopted, the exhaust fan, the spray system circulating water pump, and the evaporative cooling heat exchange system circulating water pump are started, and the external water source is connected to the evaporative cooling heat exchange system. The spray water circulation process and the cooling water circulation process are the same as above. The cooling water after heat exchange from the evaporative cooling heat exchanger is mixed with the cooling water from the external water source and enters the cooling water heat exchanger of the dual cold source condenser. The cooling water enters the evaporative cooling heat exchanger after heat exchange with the high-temperature and high-pressure gaseous refrigerant in the dual cold source condenser. The spray water is sprayed on the evaporative cooling heat exchanger. Through evaporative cooling heat exchange, part of the refrigerant condensation heat is finally discharged into the atmosphere by the exhaust fan, and the other part of the refrigerant condensation heat is discharged into the external water source. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator to provide chilled water for the air conditioning system.

[0010] When mixed cooling of air cooling and water cooling is adopted, the exhaust fan and the circulating water pump of the evaporative cooling heat exchange system are started, the spray system is not working, and the external water source is connected to the evaporative cooling heat exchange system. The cooling water circulation process is the same as above. The cooling water after heat exchange from the evaporative cooling heat exchanger is mixed with the cooling water from the external water source and enters the cooling water heat exchanger of the dual cold source condenser. The cooling water exchanges heat with the high-temperature and high-pressure gaseous refrigerant in the dual cold source condenser and then enters the evaporative cooling heat exchanger to exchange heat with the air. Part of the refrigerant condensation heat is eventually discharged into the atmosphere by the exhaust fan, and the other part of the refrigerant condensation heat is discharged into the external water source. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator to provide chilled water for the air conditioning system.

[0011] When the unit produces hot water for air conditioning alone, the evaporative heat exchanger absorbs heat from the air and external heat source water in five heat absorption methods: evaporative cooling, air cooling, water cooling, mixed cooling of evaporative cooling and water cooling, and mixed cooling of air cooling and water cooling. The refrigerant circulation process is: compressor → dual cold source condenser → liquid receiver → dry filter → liquid indicator mirror → throttle → dual heat source evaporator → gas-liquid separator → compressor.

[0012] When evaporative cooling is adopted, the exhaust fan, the circulating water pump of the spray system and the circulating water pump of the evaporative heat exchange system are started, and the circulation process of the spray water is: water collecting tank → circulating water pump → nozzle → evaporative heat exchanger → water collecting tank, and the circulation process of the heat source water is: heat source water heat exchanger of the dual cold source evaporator → circulating water pump → evaporative heat exchanger → heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator, and the heat source water is cooled and then enters the evaporative heat exchanger. The spray water is sprayed on the evaporative heat exchanger, and the heat source water is heated and the air is cooled through the hot air condensation heat exchange, and finally discharged into the atmosphere by the exhaust fan. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser to provide heating hot water for the air-conditioning system.

[0013] When air cooling is used, the exhaust fan and the circulating water pump of the evaporative heat exchange system are started, the spray system does not work, and the heat source water circulation process is the same as above. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual-cold source evaporator, the heat source water is cooled and then enters the evaporative heat exchanger to exchange heat with the hot air. The heat source water is heated and the air is cooled, and finally discharged into the atmosphere by the exhaust fan. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual-cold source condenser to provide cold and heating hot water for the air-conditioning system.

[0014] When water cooling is used, the exhaust fan, the spray system circulating water pump, and the evaporative heat exchange system circulating water pump do not work. The external water source is connected to the evaporative heat exchange system, and the heat source water enters the heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator. The heat source water is cooled and cooled, and finally discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser to provide cold and heating hot water for the air-conditioning system.

[0015] When evaporative cooling and water cooling are mixed, the exhaust fan, the spray system circulating water pump, and the evaporative cooling heat exchange system circulating water pump are started, and the external water source is connected to the evaporative cooling heat exchange system. The spray water circulation process and the heat source water circulation process are the same as above. The heat source water after heat exchange in the evaporative cooling heat exchanger is mixed with the heat source water from the external water source and enters the heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator. The heat source water is cooled and cooled. A part of the heat source water enters the evaporative cooling heat exchanger and condenses with the hot air for heat exchange. The heat source water is heated and the air is cooled. Finally, it is discharged into the atmosphere by the exhaust fan, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser to provide cold and heating hot water for the air-conditioning system.

[0016] When using a mixture of air cooling and water cooling, the exhaust fan and the circulating water pump of the evaporative heat exchange system are started, the spray system does not work, and the external water source is connected to the evaporative heat exchange system. The heat source water circulation process is the same as above. The heat source water after heat exchange in the evaporative heat exchanger is mixed with the heat source water from the external water source and enters the heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator, and the heat source water is cooled and cooled. Part of the heat source water enters the evaporative heat exchanger and exchanges heat with the hot air. The heat source water is heated and the air is cooled. Finally, it is discharged into the atmosphere by the exhaust fan, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser to provide cold and heating hot water for the air-conditioning system.

[0017] When the unit produces domestic hot water alone, the evaporative heat exchanger absorbs heat from the air and external heat source water using five heat absorption methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling. The hot water heat exchanger of the dual cold source condenser provides domestic hot water. The refrigerant cycle process is: compressor → dual cold source condenser → liquid receiver → drying filter → liquid indicator mirror → throttle → dual heat source evaporator → gas-liquid separator → compressor.

[0018] When evaporative cooling is adopted, the exhaust fan, the circulating water pump of the spray system and the circulating water pump of the evaporative heat exchange system are started, and the spray water circulation process is: water collecting tank → circulating water pump → nozzle → evaporative heat exchanger → water collecting tank, and the heat source water circulation process is: heat source water heat exchanger of the dual cold source evaporator → circulating water pump → evaporative heat exchanger → heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator, and the heat source water is cooled and then enters the evaporative heat exchanger. The spray water is sprayed on the evaporative heat exchanger, and the heat source water is heated and the air is cooled through the hot air condensation heat exchange, and finally discharged into the atmosphere by the exhaust fan. The high-temperature and high-pressure gaseous refrigerant heats the hot water in the dual cold source condenser to provide domestic hot water for the domestic hot water system.

[0019] When air cooling is used, the exhaust fan and the circulating water pump of the evaporative heat exchange system are started, the spray system does not work, and the heat source water circulation process is the same as above. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual-cold source evaporator. The heat source water is cooled and then enters the evaporative heat exchanger to exchange heat with the hot air. The heat source water is heated and the air is cooled. Finally, it is discharged into the atmosphere by the exhaust fan. The high-temperature and high-pressure gaseous refrigerant heats hot water in the dual-cold source condenser to provide domestic hot water for the domestic hot water system.

[0020] When water cooling is used, the exhaust fan, the circulating water pump of the spray system, and the circulating water pump of the evaporative heat exchange system do not work. The external water source is connected to the evaporative heat exchange system, and the heat source water enters the heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator. The heat source water is cooled and cooled, and finally discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats hot water in the dual cold source condenser to provide domestic hot water for the domestic hot water system.

[0021] When evaporative cooling and water cooling are mixed, the exhaust fan, the spray system circulating water pump, and the evaporative cooling heat exchange system circulating water pump are started, and the external water source is connected to the evaporative cooling heat exchange system. The spray water circulation process and the heat source water circulation process are the same as above. The heat source water after heat exchange in the evaporative cooling heat exchanger is mixed with the heat source water from the external water source and enters the heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator. The heat source water is cooled and cooled. Part of the heat source water enters the evaporative cooling heat exchanger and condenses with the hot air for heat exchange. The heat source water is heated and the air is cooled. Finally, it is discharged into the atmosphere by the exhaust fan, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats hot water in the dual cold source condenser to provide domestic hot water for the domestic hot water system.

[0022] When using a mixture of air cooling and water cooling, the exhaust fan and the circulating water pump of the evaporative heat exchange system are started, the spray system does not work, and the external water source is connected to the evaporative heat exchange system. The heat source water circulation process is the same as above. The heat source water after heat exchange in the evaporative heat exchanger is mixed with the heat source water from the external water source and enters the heat source water heat exchanger of the dual cold source evaporator. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator, and the heat source water is cooled and cooled. Part of the heat source water enters the evaporative heat exchanger and exchanges heat with the hot air. The heat source water is heated and the air is cooled. Finally, it is discharged into the atmosphere by the exhaust fan, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats hot water in the dual cold source condenser to provide domestic hot water for the domestic hot water system.

[0023] When the unit produces air-conditioning chilled water and domestic hot water at the same time, the evaporative heat exchanger uses five cooling methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to discharge heat or absorb heat to the air and external water source. Whether to use the evaporative heat exchanger should be determined according to the matching of the air-conditioning refrigeration load and the hot water load. When the air-conditioning refrigeration load is greater than the hot water load, the evaporative heat exchanger is used to dissipate heat to the air or external water source. The operation mode of the evaporative heat exchanger is the same as the operation mode when the unit produces air-conditioning chilled water alone. At this time, domestic hot water is produced through the hot water heat exchanger of the dual cold source condenser, and heat is dissipated through the cooling water heat exchanger of the dual cold source condenser; when the air-conditioning refrigeration load is less than the hot water load, the evaporative heat exchanger is used to absorb heat from the air or external water source. The heat absorption method is the same as the operation mode when the unit produces domestic hot water alone. At this time, air-conditioning chilled water is produced through the chilled water heat exchanger of the dual cold source evaporator, and heat is absorbed from the air or external water source through the hot source water heat exchanger of the dual cold source evaporator. The refrigerant cycle process is: compressor → dual cold source condenser → liquid receiver → dry filter → liquid indicator mirror → throttle → dual heat source evaporator → gas-liquid separator → compressor.

[0024] When the unit produces hot water for air conditioning and domestic hot water at the same time, the evaporative heat exchanger absorbs heat from the air and external water source using five heat absorption methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling. The hot water heat exchanger of the dual cold source condenser provides domestic hot water, and the cooling water heat exchanger of the dual cold source condenser provides air conditioning hot water. The operation mode of the evaporative heat exchanger is the same as the operation mode when the unit produces hot water for air conditioning and domestic hot water alone. At this time, the heat source water heat exchanger of the dual cold source evaporator absorbs heat from the air or external water source. The refrigerant cycle process is: compressor → dual cold source condenser → liquid storage → drying filter → liquid indicator mirror → throttle → dual heat source evaporator → gas-liquid separator → compressor.

[0025] When the unit produces air-conditioning chilled water and air-conditioning hot water at the same time, the evaporative heat exchanger uses five methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to discharge or absorb heat to the air and external water source. The chilled water heat exchanger of the dual-cold source evaporator provides air-conditioning chilled water, and the cooling water heat exchanger of the dual-cold source condenser provides air-conditioning hot water. When the air conditioning refrigeration load is equal to the air conditioning hot water load, the spray system, evaporative cooling heat exchange system, and exhaust fan do not work; when the air conditioning refrigeration load is greater than the air conditioning hot water load, the evaporative cooling heat exchanger is used to dissipate heat to the air or external water source. The operation mode of the evaporative cooling heat exchanger is the same as the operation mode when the unit produces air conditioning chilled water alone. At this time, the cooling water heat exchanger of the dual cold source condenser provides air conditioning hot water while dissipating heat through the evaporative cooling heat exchanger; when the air conditioning refrigeration load is less than the air conditioning hot water load, the evaporative cooling heat exchanger is used to absorb heat from the air or external water source. The heat absorption method is the same as the operation mode when the unit produces domestic hot water alone. At this time, the air conditioning chilled water is produced through the chilled water heat exchanger of the dual cold source evaporator, and the heat source water heat exchanger of the dual cold source evaporator absorbs heat from the air or external water source. The refrigerant cycle process is: compressor → dual cold source condenser → liquid storage → dry filter → liquid indicator mirror → throttle → dual heat source evaporator → gas-liquid separator → compressor.

[0026] When the unit produces air-conditioning chilled water, air-conditioning hot water and domestic hot water at the same time, the evaporative heat exchanger uses five methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to dissipate or absorb heat to the air and external water source. The chilled water heat exchanger of the dual-cold source evaporator provides air-conditioning chilled water, the cooling water heat exchanger of the dual-cold source condenser provides air-conditioning hot water, and the hot water heat exchanger of the dual-cold source condenser provides domestic hot water. When the air conditioning refrigeration load is equal to the air conditioning hot water and domestic hot water load, the spray system, evaporative cooling heat exchange system, and exhaust fan do not work; when the air conditioning refrigeration load is greater than the air conditioning hot water and domestic hot water load, the evaporative cooling heat exchanger is used to dissipate heat to the air or external water source. The operation mode of the evaporative cooling heat exchanger is the same as the operation mode when the unit produces air conditioning chilled water alone. At this time, the cooling water heat exchanger of the dual cold source condenser provides air conditioning hot water while dissipating heat through the evaporative cooling heat exchanger; when the air conditioning refrigeration load is less than the air conditioning hot water and domestic hot water load, the evaporative cooling heat exchanger is used to absorb heat from the air or external water source. The heat absorption mode is the same as the operation mode when the unit produces domestic hot water alone. At this time, the air conditioning chilled water is produced through the chilled water heat exchanger of the dual cold source evaporator, and the heat source water heat exchanger of the dual cold source evaporator absorbs heat from the air or external water source. The refrigerant cycle process is: compressor → dual cold source condenser → liquid storage → filter dryer → liquid indicator mirror → throttle → dual heat source evaporator → gas-liquid separator → compressor.

[0027] When the unit uses cold air to produce chilled water in winter, the evaporative heat exchanger uses evaporative cooling and air cooling to dissipate heat into the air. The exhaust fan and the circulating water pump of the spray system are started, and the chilled water is connected to the evaporative heat exchanger. The chilled water is cooled by evaporative cooling and air cooling, utilizing the natural cold source. There is no need to start the refrigeration system, thus achieving significant energy saving. It can be used for heat dissipation in the data center in winter.

[0028] Therefore, through five methods of evaporative cooling, air cooling, water cooling, mixed cooling of evaporative cooling and water cooling, and mixed cooling of air cooling and water cooling, eight functions are achieved, including separate production of air-conditioning chilled water, separate production of air-conditioning hot water, separate production of domestic hot water, simultaneous production of air-conditioning chilled water and domestic hot water, simultaneous production of air-conditioning hot water and domestic hot water, simultaneous production of air-conditioning chilled water and air-conditioning hot water, simultaneous production of air-conditioning chilled water, air-conditioning hot water and domestic hot water, and using cold air to produce chilled water in winter. It can be used in all seasons of the year, fully utilizes various waste energy of water bodies, and has significant effects in energy conservation and emission reduction, simplifies the refrigeration system, reduces the failure rate, and improves operational reliability. The unit has a compact structure and occupies a small area. It does not require a refrigeration room and can be placed outdoors or on the roof, reducing costs. The use of a heat source tower also reduces the risk of frost.

[0029] The heat exchange method of the condenser and evaporator of the above-mentioned unit is to exchange heat indirectly with the air or external water source through an evaporative heat exchanger. The water system has many valves and the conversion is relatively complicated. It is also possible to reduce the number of valves in the water system by direct heat exchange. Please refer to the specific implementation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a trigeneration unit structure using a heat source tower Figure 1

[0031] Figure 2 It is a trigeneration unit structure using a heat source tower Figure 2

[0032] Figure 3 It is a trigeneration unit structure using a heat source tower Figure 3

[0033] Figure 4 It is a double cold source condenser and double heat source evaporator structure. Figure 1

[0034] Figure 5 It is a double cold source condenser and double heat source evaporator structure. Figure 2

[0035] Figure 6 Plate and jacket heat exchanger structure diagram

[0036] Description of reference numerals:

[0037] 1. Compressor, 2. Dual cold source condenser, 3. Dual heat source evaporator, 4. Throttle, 5. Liquid indicator, 6. Dry filter, 7. Liquid reservoir, 8. Gas-liquid separator, 9. Hot water inlet pipe, 10. Hot water outlet pipe, 11. Cooling water inlet pipe, 12. Cooling water outlet pipe, 13. Chilled water inlet pipe, 14. Chilled water outlet pipe, 15. Heat source water inlet pipe, 16. Heat source water outlet pipe , 17, 18, 84, 85, 86, circulating water pump, 19, 43, water collecting tank, 20, evaporative heat exchanger, 21, nozzle, 22, exhaust fan, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 87, 88, 89, 90, 91, 92, valve , 44, evaporator, 45, 46, evaporator air inlet, 47, chilled water splitter, 48, chilled water header, 49, 58, 60, 64, 65, insulation baffle, 50, evaporator air outlet, 51, exhaust duct valve, 52, 53, condenser air inlet, 54, condenser, 55, condenser air outlet, 56, cooling water splitter, 57, cooling water header, 59, exhaust Air duct, 61, water heater, 62, hot water distribution tank, 63, hot water collecting tank, 66, water retaining folding plate, 67, outer shell, 68, 76, refrigerant inlet pipe, 69, 77, refrigerant outlet pipe, 70, 72, 74, water inlet pipe, 71, 73, 75, water outlet pipe, 78, flat jacket, 79, inflation plate, 80, inflation tube, 81, welding edge, 82, support, 83, water cavity. DETAILED DESCRIPTION

[0038] Figure 1In the invention, a trigeneration unit using a heat source tower is adopted, which includes a refrigeration system, a spray system, an evaporative cooling heat exchange system, a chilled water circulation pump 84, a heating water circulation pump 85, a hot water circulation pump 86, an exhaust fan 22, and a shell. The refrigeration system is a single cooling system, which includes a compressor 1, a dual cold source condenser 2, a dual heat source evaporator 3, and a throttle 4. The dual cold source condenser 2 includes a hot water heat exchanger and a cooling water heat exchanger. The dual cold source evaporator 3 includes a chilled water heat exchanger and a heat source water heat exchanger; the spray system includes a circulating water pump 17, a nozzle 21, and a water collecting tank 19; the evaporative cooling heat exchange system includes an evaporative cooling heat exchanger 20 and a circulating water pump 18. The refrigeration system, the spray system, and the evaporative cooling heat exchange system are installed in a shell with a supporting frame inside. The exhaust fan 22 is installed on the top of the shell, the spray pipe and the nozzle 21 are below the exhaust fan 22, the evaporative cooling heat exchanger 20 is installed below the nozzle 21, and the water collecting tank 19 is installed below the evaporative cooling heat exchanger 20. The compressor 1, the dual cold source condenser 2, the dual heat source evaporator 3, the chilled water circulating water pump 84, the heating water circulating water pump 85, the hot water circulating water pump 86, the spray system circulating water pump 17, and the evaporative cooling heat exchange system circulating water pump 18 are installed below the water collecting tank 19. The dual cold source condenser 2 is a double water pipe (or double water channel) heat exchanger, which has a hot water inlet pipe 9, a hot water outlet pipe 10, a cooling water inlet pipe 11, and a cooling water outlet pipe 12; the dual heat source evaporator is a double water pipe (or double water channel) heat exchanger, which has a chilled water inlet pipe 13, a chilled water outlet pipe 14, a heat source water inlet pipe 15, and a heat source water outlet pipe 16. The cooling water heat exchanger inlet and outlet pipes of the dual cold source condenser 2, the heat source water heat exchanger inlet and outlet pipes of the dual heat source evaporator, the spray system, the evaporative cooling heat exchange system, and the external water source are connected to each other. The cooling water heat exchanger of the dual cold source condenser 2 is connected to the air conditioning and heating system at the same time, its hot water heat exchanger is connected to the domestic hot water system, and the chilled water heat exchanger of the dual cold source evaporator 3 is connected to the air conditioning chilled water system. The chilled water circulation pump 84 is connected to the chilled water heat exchanger of the dual heat source evaporator 3, the heating water circulation pump 85 is connected to the cooling water heat exchanger of the dual cold source condenser 2, and the hot water circulation pump 86 is connected to the hot water heat exchanger of the dual cold source condenser 2. The hot water heat exchanger and cooling water heat exchanger of the dual cold source condenser 2 and the chilled water heat exchanger and heat source water heat exchanger of the dual cold source evaporator 3 are connected in mixed connection, parallel connection or series connection with respect to the refrigerant.

[0039] Figure 4 , 5 This is the structure diagram of the dual cold source condenser and dual heat source evaporator. Figure 4 The water pipeline is a spiral tube installed in the shell. The refrigerant enters the shell and flows through the outer surface of the spiral tube. It is a double water tube heat exchanger. Figure 5 It is a shell and tube heat exchanger. Water flows through the straight tube and the refrigerant flows through the outer surface of the straight tube. It is a double-channel heat exchanger. Figure 4 , 5In Figure A, the two sets of heat exchangers are mixed with respect to the refrigerant, and the two sets of water sources exchange heat with the same refrigerant at the same time. Figure 4 , 5 In Figure B, the two sets of heat exchangers are located in independent cavities and connected in parallel. The refrigerant enters the two sets of heat exchangers at the same time. A regulating valve can be installed on the refrigerant pipeline to control the refrigerant flow of the two sets of heat exchangers. Figure 4 , 5 In Figure C, the two groups of heat exchangers are located in independent cavities and connected in series. The refrigerant first enters one group of heat exchangers for heat exchange, and then enters the next group of heat exchangers for heat exchange. The above heat exchangers are not limited, and other forms of heat exchangers can also be used.

[0040] When the unit produces air-conditioning chilled water alone, the chilled water heat exchanger of the dual heat source evaporator 3 provides air-conditioning chilled water, the chilled water circulation pump 84 is started, and the cooling water heat exchanger of the dual cold source condenser 2 discharges condensation heat. The evaporative cooling heat exchanger 20 uses five cooling methods, namely evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling, to discharge refrigerant condensation heat. The cooling method to be used should be determined based on factors such as the heat load discharged, climatic conditions, and the temperature of the external water source. The refrigerant circulation process is: compressor 1→dual cold source condenser 2→liquid storage tank 7→drying filter 6→liquid indicator mirror 5→throttle 4→dual heat source evaporator 3→gas-liquid separator 8→compressor 1.

[0041] When evaporative cooling is adopted, the exhaust fan 22 and circulating water pumps 17 and 18 are started, valves 26, 27, 29, 35 and 37 are opened, and the other valves are closed. The spray water circulation process is: water collecting tank 19 → valve 29 → circulating water pump 17 → valve 37 → nozzle 21 → outer surface of evaporative heat exchanger 20 → water collecting tank 19. The cooling water circulation process is: cooling water heat exchanger of dual cold source condenser 2 → valve 27 → circulating water pump 18 → evaporative heat exchanger 20 → valve Door 35 → valve 26 → cooling water heat exchanger of dual cold source condenser 2. The cooling water is heated by the high-temperature and high-pressure gaseous refrigerant in the cooling water heat exchanger of the dual cold source condenser 2, and then enters the evaporative heat exchanger 20. The spray water is sprayed on the evaporative heat exchanger 20. The cooling water is cooled through evaporative cooling and heat exchange. The condensation heat of the refrigerant is finally discharged into the atmosphere by the exhaust fan 22. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3 to provide chilled water for the air-conditioning system. The above-mentioned cooling water is a closed cycle, and the spray system can also be used for open cycle heat dissipation. Valves 26, 27, 28, 30, 32, 31, and 37 are opened, and the remaining valves and the circulating water pump 18 are closed. The spray cooling water circulation process is: water collecting tank 19→valve 30→valve 32→valve 26→cooling water heat exchanger of dual cold source condenser 2→valve 27→valve 31→valve 28→circulating water pump 17→valve 37→sprinkler 21→outer surface of evaporative heat exchanger 20→water collecting tank 19.

[0042] When air cooling is adopted, the exhaust fan 22 and the circulating water pump 18 are started, the spray system does not work, the valves 26, 27, and 35 are opened, and the other valves are closed. The cooling water circulation process is the same as above. The cooling water is heated by the high-temperature and high-pressure gaseous refrigerant in the cooling water heat exchanger of the dual cold source condenser 2, and then enters the evaporative heat exchanger 20 to exchange heat with the air. The cooling water is cooled, and the condensation heat of the refrigerant is finally discharged into the atmosphere by the exhaust fan 22. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3 to provide chilled water for the air conditioning system.

[0043] When water cooling is adopted, the exhaust fan 22 and the circulating water pumps 17 and 18 do not work, the valves 26, 27, 33 and 34 are opened, and the other valves are closed. The external water source is connected to the evaporative heat exchange system, and the cooling water enters the cooling water heat exchanger of the dual cold source condenser 2, exchanges heat with the high-temperature and high-pressure gaseous refrigerant, and discharges the condensation heat of the refrigerant into the external water source. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 2 to provide chilled water for the air conditioning system.

[0044] When evaporative cooling and water cooling are mixed, the exhaust fan 22, circulating water pumps 17, 18 are started, valves 26, 27, 29, 33, 34, 35, 37 are opened, and the other valves are closed. The external water source is connected to the evaporative cooling heat exchange system, and the spray water circulation process and the cooling water circulation process are the same as above. The cooling water after heat exchange from the evaporative cooling heat exchanger 20 is mixed with the cooling water from the external water source and enters the cooling water heat exchanger of the dual cold source condenser 2. After the cooling water exchanges heat with the high-temperature and high-pressure gaseous refrigerant in the dual cold source condenser 2, a part of the cooling water enters the evaporative cooling heat exchanger 20, and the spray water is sprayed on the evaporative cooling heat exchanger 20. Through evaporative cooling heat exchange, a part of the refrigerant condensation heat is finally discharged into the atmosphere by the exhaust fan 22, and the other part of the refrigerant condensation heat is discharged into the external water source. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3 to provide chilled water for the air conditioning system.

[0045] When mixed cooling of air cooling and water cooling is adopted, the exhaust fan 22 and the circulating water pump 18 are started, the spray system does not work, the valves 26, 27, 33, 34, 35 are opened, and the other valves are closed. The external water source is connected to the evaporative cooling heat exchange system, and the cooling water circulation process is the same as above. The cooling water after heat exchange from the evaporative cooling heat exchanger 20 is mixed with the cooling water from the external water source and enters the cooling water heat exchanger of the dual cold source condenser 2. After the cooling water exchanges heat with the high-temperature and high-pressure gaseous refrigerant in the dual cold source condenser 2, a part of the cooling water enters the evaporative cooling heat exchanger 20 to exchange heat with the air, a part of the refrigerant condensation heat is finally discharged into the atmosphere by the exhaust fan 22, and another part of the refrigerant condensation heat is discharged into the external water source. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3 to provide chilled water for the air conditioning system.

[0046] When the unit produces air-conditioning hot water alone, the cooling water heat exchanger of the dual cold source condenser 2 provides air-conditioning hot water, the heating water circulation pump 85 is started, and heat is absorbed through the heat source water heat exchanger of the dual heat source evaporator 3. The evaporative cooling heat exchanger 20 absorbs heat from the air and external heat source water using five heat absorption methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling. Valves 23 and 25 are opened, and valves 24, 26, and 27 are closed. The refrigerant circulation process is: compressor 1→dual cold source condenser 2→liquid storage tank 7→drying filter 6→liquid indicator mirror 5→throttle 4→dual heat source evaporator 3→gas-liquid separator 8→compressor 1.

[0047] When evaporative cooling is adopted, the exhaust fan 22 and the circulating water pumps 17 and 18 are started, and the valves 29, 31, 32, 35 and 37 are opened. The spray water circulation process is: the water collecting tank 19→valve 29→circulating water pump 17→valve 37→sprinkler 21→evaporative heat exchanger 20→water collecting tank 19, and the heat source water circulation process is: the heat source water heat exchanger of the dual cold source evaporator 3→valve 31→circulating water pump 18→evaporative heat exchanger 20→valve 35→valve 32→heat source water heat exchanger of the dual cold source evaporator 3. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3, and the heat source water is cooled and cooled, and then enters the evaporative heat exchanger 20. The spray water is sprayed on the evaporative heat exchanger 20, and the heat source water is heated and the air is cooled through the hot air condensation heat exchange, and finally discharged into the atmosphere by the exhaust fan. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser 2 to provide cold and heating hot water for the air-conditioning system. The above-mentioned heat source water is a closed cycle, and the spray system can also be used for open cycle heat absorption. Valves 28, 30, and 37 are opened, and the remaining valves and circulating water pump 18 are closed. The spray heat source water circulation process is: water collecting tank 19→valve 30→heat source water heat exchanger of dual cold source evaporator 2→valve 28→circulating water pump 17→valve 37→sprinkler 21→outer surface of evaporative cold heat exchanger 20→water collecting tank 19.

[0048] When air cooling is adopted, the exhaust fan 22 and the circulating water pump 18 are started, the spray system does not work, the valves 31, 32, and 35 are opened, and the other valves and the circulating water pump 17 are closed. The heat source water circulation process is the same as above. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3, the heat source water is cooled and then enters the evaporative heat exchanger 20 to exchange heat with the hot air. The heat source water is heated and the air is cooled, and finally discharged into the atmosphere by the exhaust fan 22. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser 2 to provide cold and heating hot water for the air-conditioning system.

[0049] When water cooling is adopted, the exhaust fan 22 and the circulating water pumps 17 and 18 do not work, the valves 31, 32, 33 and 34 are opened, and the other valves are closed. The external water source is connected to the evaporative heat exchange system, and the heat source water enters the heat source water heat exchanger of the dual cold source evaporator 3. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3. The heat source water is cooled and cooled, and finally discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser 2 to provide cold and heating hot water for the air-conditioning system.

[0050] When evaporative cooling and water cooling are mixed, the exhaust fan 22, circulating water pumps 17, 18 are started, valves 29, 31, 32, 33, 34, 35, 37 are opened, and the other valves are closed. The external water source is connected to the evaporative cooling heat exchange system, and the spray water circulation process and the heat source water circulation process are the same as above. The heat source water after heat exchange from the evaporative cooling heat exchanger 20 is mixed with the heat source water of the external water source and enters the heat source water heat exchanger of the dual cold source evaporator 3. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3, and the heat source water is cooled and cooled. A part of the heat source water enters the evaporative cooling heat exchanger 20, condenses and exchanges heat with the hot air, the heat source water is heated, the air is cooled, and finally discharged into the atmosphere by the exhaust fan 22, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser 2 to provide cold and heating hot water for the air conditioning system. Alternatively, the exhaust fan 22 and the circulating water pump 17 are started, the valves 28, 30, 31, 33, 34, 36, and 37 are opened, the other valves and the circulating water pump 18 are closed, and the external water source is connected to the spray system, mixed with the spray circulating water, absorbs heat from the air on the surface of the evaporative heat exchanger 20 and heats up, and finally enters the heat source water heat exchanger of the dual cold source evaporator 3 for heat exchange.

[0051] When adopting mixed cooling of air cooling and water cooling, the exhaust fan 22 and the circulating water pump 18 are started, the spray system does not work, the valves 31, 32, 33, 34, and 35 are opened, and the other valves are closed. The external water source is connected to the evaporative heat exchange system, and the heat source water circulation process is the same as above. The heat source water after heat exchange in the evaporative heat exchanger 20 is mixed with the heat source water of the external water source and enters the heat source water heat exchanger of the dual cold source evaporator 3. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3, and the heat source water is cooled and cooled. Part of the heat source water enters the evaporative heat exchanger 20, exchanges heat with the hot air, the heat source water is heated, and the air is cooled. Finally, it is discharged into the atmosphere by the exhaust fan 22, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser 2 to provide cold and heating hot water for the air-conditioning system.

[0052] When the unit produces domestic hot water alone, the hot water heat exchanger of the dual cold source condenser 2 provides domestic hot water, and the hot water circulation pump 86 is started to absorb heat through the heat source water heat exchanger of the dual heat source evaporator 3. The evaporative heat exchanger absorbs heat from the air and external heat source water using five heat absorption methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling. The refrigerant cycle process is: compressor 1→dual cold source condenser 2→liquid storage tank 7→drying filter 6→liquid indicator mirror 5→throttle 4→dual heat source evaporator 3→gas-liquid separator 8→compressor 1.

[0053] When evaporative cooling is adopted, exhaust fan 22, circulating water pumps 17 and 18 are started, valves 29, 31, 32, 35 and 37 are opened, and other valves are closed. The spray water circulation process is: water collecting tank 19 → valve 29 → circulating water pump 17 → valve 37 → nozzle 21 → evaporative heat exchanger 20 → water collecting tank 19. The heat source water circulation process is: heat source water heat exchanger of dual cold source evaporator 3 → valve 31 → circulating water pump 18 → evaporative heat exchanger 20 → valve 35 → valve 32 → heat source water heat exchanger of dual cold source evaporator 3, low temperature and low pressure liquid refrigerant evaporates and absorbs heat in dual cold source evaporator 3, heat source water is cooled and then enters evaporative cold heat exchanger 20, spray water is sprayed on evaporative cold heat exchanger 20, through hot air condensation heat exchange, heat source water is heated, air is cooled, and finally discharged into the atmosphere by exhaust fan, high temperature and high pressure gaseous refrigerant heats air conditioning hot water in dual cold source condenser 2, and provides cold domestic hot water for hot water system. The above heat source water is a closed cycle, and the open cycle of the spray system can also be used to absorb heat. Valves 28, 30, and 37 are opened, and the other valves and circulating water pump 18 are closed. The circulation process of spraying heat source water is: water collecting tank 19 → valve 30 → heat source water heat exchanger of dual cold source evaporator 2 → valve 28 → circulating water pump 17 → valve 37 → nozzle 21 → outer surface of evaporative cold heat exchanger 20 → water collecting tank 19.

[0054] When air cooling is adopted, the exhaust fan 22 and the circulating water pump 18 are started, the spray system does not work, and the heat source water circulation process is the same as above. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3, the heat source water is cooled and then enters the evaporative heat exchanger 20 to exchange heat with the hot air. The heat source water is heated and the air is cooled, and finally discharged into the atmosphere by the exhaust fan. The high-temperature and high-pressure gaseous refrigerant heats hot water in the dual cold source condenser 2 to provide domestic hot water for the domestic hot water system.

[0055] When water cooling is adopted, the exhaust fan 22 and the circulating water pumps 17 and 18 do not work, the valves 31, 32, 33 and 34 are opened, and the other valves are closed. The external water source is connected to the evaporative heat exchange system, and the heat source water enters the heat source water heat exchanger of the dual cold source evaporator 3. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3. The heat source water is cooled and cooled, and finally discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the hot water in the dual cold source condenser 2 to provide domestic hot water for the domestic hot water system.

[0056] When evaporative cooling and water cooling are mixed, the exhaust fan 22, circulating water pumps 17, 18 are started, valves 29, 31, 32, 33, 34, 35, 37 are opened, and the other valves are closed. The external water source is connected to the evaporative cooling heat exchange system, and the spray water circulation process and the heat source water circulation process are the same as above. The heat source water after heat exchange from the evaporative cooling heat exchanger 20 is mixed with the heat source water of the external water source and enters the heat source water heat exchanger of the dual cold source evaporator 3. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3, and the heat source water is cooled and cooled. A part of the heat source water enters the evaporative cooling heat exchanger 20, condenses and exchanges heat with the hot air, the heat source water is heated, the air is cooled, and finally discharged into the atmosphere by the exhaust fan 22, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats hot water in the dual cold source condenser 2 to provide cold domestic hot water for the hot water system. Alternatively, the exhaust fan 22 and the circulating water pump 17 are started, the valves 28, 30, 31, 33, 34, 36, and 37 are opened, the other valves and the circulating water pump 18 are closed, and the external water source is connected to the spray system, mixed with the spray circulating water, absorbs heat from the air on the surface of the evaporative heat exchanger 20 and heats up, and finally enters the heat source water heat exchanger of the dual cold source evaporator 3 for heat exchange.

[0057] When adopting mixed cooling of air cooling and water cooling, the exhaust fan 22 and the circulating water pump 18 are started, the spray system does not work, the valves 31, 32, 33, 34, and 35 are opened, and the other valves are closed. The external water source is connected to the evaporative heat exchange system, and the heat source water circulation process is the same as above. The heat source water after heat exchange in the evaporative heat exchanger 20 is mixed with the heat source water of the external water source and enters the heat source water heat exchanger of the dual cold source evaporator 3. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the dual cold source evaporator 3, and the heat source water is cooled and cooled. Part of the heat source water enters the evaporative heat exchanger 20, exchanges heat with the hot air, the heat source water is heated, and the air is cooled. Finally, it is discharged into the atmosphere by the exhaust fan 22, and the other part of the heat source water is discharged into the external water source. The high-temperature and high-pressure gaseous refrigerant heats the air-conditioning hot water in the dual cold source condenser 2 to provide cold and heating hot water for the air-conditioning system.

[0058] When the unit produces air-conditioning chilled water and domestic hot water at the same time, the chilled water circulation pump 84 and the hot water circulation pump 86 are started, and the evaporative heat exchanger 20 uses five cooling methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to discharge heat or absorb heat to the air and external water source. Whether to use the evaporative heat exchanger 20 should be determined according to the matching of the air-conditioning refrigeration load and the hot water load.

[0059] When the air conditioning refrigeration load is equal to the hot water load, the spray system and evaporative cooling heat exchange system will not work.

[0060] When the air conditioning refrigeration load is greater than the hot water load, the evaporative heat exchanger 20 is used to dissipate heat to the air or external water source. The operation mode of the evaporative heat exchanger 20 is the same as the operation mode when the unit produces air conditioning chilled water alone. At this time, domestic hot water is produced through the hot water heat exchanger of the dual cold source condenser 2, and heat is dissipated through the cooling water heat exchanger of the dual cold source condenser 2. Valves 26, 27, 29, 35, and 37 are opened, and the remaining valves are closed. The spray water circulation process is: water collecting tank 19→valve 29→circulating water pump 17→valve 37→sprinkler 21→outer surface of evaporative heat exchanger 20→water collecting tank 19, and the cooling water circulation process is: cooling water heat exchanger of dual cold source condenser 2→valve 27→circulating water pump 18→evaporative heat exchanger 20→valve 35→valve 26→cooling water heat exchanger of dual cold source condenser 2.

[0061] When the air conditioning refrigeration load is less than the hot water load, the evaporative heat exchanger 20 is used to absorb heat from the air or the external water source. The heat absorption method is the same as the operation method when the unit produces domestic hot water alone. At this time, the air conditioning chilled water is produced through the chilled water heat exchanger of the dual cold source evaporator 3, and the heat source water heat exchanger of the dual cold source evaporator 3 absorbs heat from the air or the external water source.

[0062] When the unit produces air-conditioning hot water and domestic hot water at the same time, the heating water circulation pump 85 and the hot water circulation pump 86 are started, and the evaporative heat exchanger 20 absorbs heat from the air and external water source in five heat absorption modes: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling. The hot water heat exchanger of the dual cold source condenser provides domestic hot water, and the cooling water heat exchanger of the dual cold source condenser provides air-conditioning hot water. The operation mode of the evaporative heat exchanger 20 is the same as the operation mode when the unit produces air-conditioning hot water and domestic hot water alone. At this time, the heat source water heat exchanger of the dual cold source evaporator absorbs heat from the air or the external water source.

[0063] When the unit produces air-conditioning chilled water and air-conditioning hot water at the same time, the chilled water circulation pump 84 and the heating water circulation pump 85 are started, and the evaporative heat exchanger 20 uses five methods of evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to discharge or absorb heat to the air and external water source water. The chilled water heat exchanger of the dual cold source evaporator 3 provides air-conditioning chilled water, and the cooling water heat exchanger of the dual cold source condenser 2 provides air-conditioning hot water. When the air-conditioning refrigeration load is equal to the air-conditioning hot water load, the spray system, the evaporative cooling heat exchange system and the exhaust fan do not work; when the air-conditioning refrigeration load is greater than the air-conditioning hot water load, the evaporative cooling heat exchanger 20 is used to dissipate heat to the air or an external water source, and the operation mode of the evaporative cooling heat exchanger 20 is the same as the operation mode when the unit produces air-conditioning chilled water alone. At this time, the cooling water heat exchanger of the dual cold source condenser 2 provides air-conditioning hot water while also dissipating heat through the evaporative cooling heat exchanger; when the air-conditioning refrigeration load is less than the air-conditioning hot water load, the evaporative cooling heat exchanger 20 is used to absorb heat from the air or an external water source, and the heat absorption mode is the same as the operation mode when the unit produces domestic hot water alone. At this time, the chilled water heat exchanger of the dual cold source evaporator 3 is used to produce air-conditioning chilled water, and the heat source water heat exchanger of the dual cold source evaporator 3 is used to absorb heat from the air or an external water source.

[0064] When the unit produces air-conditioning chilled water, air-conditioning hot water and domestic hot water at the same time, the chilled water circulation pump 84, the heating water circulation pump 85 and the hot water circulation pump 86 are started, and the evaporative heat exchanger 20 discharges or absorbs heat to the air and the external water source in five ways: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling. The chilled water heat exchanger of the dual cold source evaporator 3 provides air-conditioning chilled water, the cooling water heat exchanger of the dual cold source condenser 2 provides air-conditioning hot water, and the hot water heat exchanger of the dual cold source condenser 2 provides domestic hot water. When the air-conditioning refrigeration load is equal to the air-conditioning hot water and domestic hot water loads, the spray system, the evaporative cooling heat exchange system, and the exhaust fan do not work; when the air-conditioning refrigeration load is greater than the air-conditioning hot water and domestic hot water loads, the evaporative cooling heat exchanger 20 is used to dissipate heat to the air or an external water source, and the operation mode of the evaporative cooling heat exchanger is the same as the operation mode when the unit produces air-conditioning chilled water alone. At this time, the cooling water heat exchanger of the dual cold source condenser 2 provides air-conditioning hot water while dissipating heat through the evaporative cooling heat exchanger 20; when the air-conditioning refrigeration load is less than the air-conditioning hot water and domestic hot water loads, the evaporative cooling heat exchanger 20 is used to absorb heat from the air or an external water source, and the heat absorption mode is the same as the operation mode when the unit produces domestic hot water alone. At this time, the chilled water heat exchanger of the dual cold source evaporator 3 is used to produce air-conditioning chilled water, and the heat source water heat exchanger of the dual cold source evaporator 3 is used to absorb heat from the air or an external water source.

[0065] When the unit uses cold air to produce chilled water in winter, the evaporative heat exchanger uses evaporative cooling and air cooling to discharge heat into the air. The exhaust fan 22 and the spray system circulating water pump 17 are started, and the chilled water is connected to the evaporative heat exchanger 20. The chilled water is cooled by evaporative cooling and air cooling. The natural cold source is used, and there is no need to start the refrigeration system, which achieves significant energy saving. It can be used for heat dissipation in the data center in winter.

[0066] In order to adapt to the change of refrigeration system load, the exhaust fan 22 should adopt variable frequency fan, the circulating water pump 17 of the spray system and the circulating water pump 18 of the evaporative cooling heat exchange system should adopt variable frequency water pump, and the valve for controlling the water volume should adopt electric regulating valve. The evaporative cooling heat exchanger 20 can adopt serpentine coil, spiral tube, plate type and other forms of heat exchangers, and can be equipped with ribs and fins to enhance heat exchange. It is suitable to be made of stainless steel to improve corrosion resistance. The unit can be made into a modular unit to achieve rapid splicing, or it can be made into an integrated cabinet, which can be hoisted as a whole on site and can be used after connecting the pipes.

[0067] Figure 2 In the embodiment, the double cold source condenser 2 and the double cold source evaporator 3 adopt a single water pipe (or single water channel) heat exchanger, the hot water inlet pipe 9, the hot water outlet pipe 10, the cooling water inlet pipe 11 and the cooling water outlet pipe 12 of the double cold source condenser 2 share an inlet and outlet pipe; the chilled water inlet pipe 13, the chilled water outlet pipe 14, the heat source water inlet pipe 15 and the heat source water outlet pipe 16 of the double heat source evaporator share an inlet and outlet pipe, the air-conditioning chilled water, the air-conditioning hot water, the domestic hot water and the heat source water exchange heat with the refrigerant through one pipe in the heat exchanger, the heat exchanger structure is greatly simplified, the disadvantage is that the mixing of various water sources is easy to cause pollution, in order to prevent pollution, the hot water inlet pipe 9 and the hot water outlet pipe 10 of the double cold source condenser 2 are connected to the heat exchanger of the domestic water tank as the heating source of the domestic water tank, but the heat exchange efficiency is reduced. Therefore, in order to improve the heat exchange efficiency of hot water, the double cold source condenser 2 should adopt Figure 1 Double water tube (or double water channel) heat exchanger, double cold source evaporator 3 adopts Figure 2 In the figure, the double cold source condenser 2 and the double cold source evaporator 3 adopt heat exchangers in the form of shell and tube type, spiral tube type, etc. In the shell, the refrigerant flows inside or outside the tube, and the water flows outside or inside the tube.

[0068] Figure 3In the embodiment, a trigeneration unit using a heat source tower is used, which includes a refrigeration system, a spray system, a chilled water circulation pump 84, a heating water circulation pump 85, a hot water circulation pump 86, an exhaust fan 22, and a casing 67. The refrigeration system is a single cooling system, which includes a compressor 1, a condenser 54, a water heater 61, an evaporator 44, and a throttle 4. The condenser 54 and the water heater 61 are connected in parallel or in series in the refrigeration system. In the figure, the two are connected in series. The condenser 54, the water heater 61, and the evaporator 44 are multi-media heat exchangers with five heat exchange modes, namely, evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling, such as a casing. The heat exchanger is a plate-and-tube heat exchanger, which is composed of a plurality of tube-and-tube heat exchangers and plate-and-tube heat exchangers. The outlet pipe of the condenser 54 is connected to the cooling water collecting tank 57, and the inlet pipe is connected to the cooling water distribution tank 56. The outlet pipe of the water heater 61 is connected to the hot water collecting tank 63, and the inlet pipe is connected to the hot water distribution tank 62. The outlet pipe of the evaporator 44 is connected to the chilled water collecting tank 48, and the inlet pipe is connected to the chilled water distribution tank 47. To enhance heat exchange, fins and ribs may be installed on the surface of the heat exchanger. Insulation partitions are installed around the condenser 54, the water heater 61, the evaporator 44, and the collecting tanks 19 and 43 to prevent heat transfer loss. For ventilation needs, the insulation partitions 60 and 65 are movable partitions and can be removed. The spray system includes a circulating water pump 17, a nozzle 21, and a water collecting tank 19, 43. The nozzle 21 is installed above the condenser 54, the water heater 61, and the evaporator 44, and they share a circulating water pump 17 and an exhaust fan 22, or the condenser 54, the water heater 61 and the evaporator 44 respectively use their own circulating water pumps and exhaust fans. In order to adapt to changes in the refrigeration load, the circulating water pump 17 and the exhaust fan 22 should preferably use variable frequency motors.

[0069] The refrigeration system, the spray system, and the exhaust fan 22 are installed in the shell 67 and supported by the frame. The exhaust fan 22 is installed above the shell 67. A water retaining folding plate 66 and a nozzle 21 are installed below the exhaust fan 22. A water heater 61 is installed below it, and insulation partitions 60, 64, and 65 are installed around it to form a heat exchange channel for the water heater 61; a nozzle 21 is installed below the water heater 61, and a condenser 54 is installed below it, and insulation partitions 58 are installed around it to form a heat exchange channel for the condenser 54, which has a condenser air inlet 53 and a condenser air outlet 55, and is connected to the condenser air inlet 52 on the shell 67. A water collecting tank 43 is installed below 54, and the spray water flows into it, and the box body is insulated; a nozzle 21 is installed below the water collecting tank 43, and an evaporator 44 is installed below it, and a heat-insulating baffle 49 is installed around it to form a heat exchange channel for the evaporator 44, which has an evaporator air inlet 45 and an evaporator air outlet 50, and is connected to the evaporator air inlet 46 on the shell 67. A water collecting tank 19 is installed below the evaporator 44, and the spray water flows into it, and the box body is insulated; a compressor 1, a spray system circulating water pump 17, a chilled water circulating water pump 84, a heating water circulating water pump 85, and a hot water circulating water pump 86 are installed below the water collecting tank 19. An exhaust duct 59 is installed around the shell 67, and its upper part is connected to the exhaust fan 22 air intake, and its lower part is connected to the condenser air outlet 55 and the evaporator air outlet 50. The chilled water circulation pump 84 is connected to the evaporator 44, the heating water circulation pump 85 is connected to the condenser 54, the hot water circulation pump 86 is connected to the water heater 61, and the external water source and the spray system are connected to the evaporator 44, the condenser 54, and the water heater 61.

[0070] Figure 6 There are two methods for the middle plate jacket heat exchanger. In the figure, the expansion plate 79 in B blows out the expansion tube 80, in which the refrigerant flows. The expansion plate 79 has a refrigerant inlet pipe 76 and a refrigerant outlet pipe 77, which are installed in two flat jackets 78. Two sealed water chambers 83 are formed between the expansion plate 79 and the two flat jackets 78. Cooling water passes through them to exchange heat with the refrigerant. The expansion plate 79 is fixed in the water chamber 83 by a support 82. The two flat jackets 78 are movably connected by bolts or welded around the periphery. The movably connected connection is easy to remove scale. The water chamber 83 is connected with a water inlet pipe 74 and a water outlet pipe 75. The refrigerant inlet pipe 76 and the refrigerant outlet pipe 77 pass through the welding edge 81 and are led out of the flat jacket 78. In the figure, C uses two expansion plates 79, and a water chamber 83 is formed between them. Cooling water passes through them to exchange heat with the refrigerant. The two expansion plates 79 are movably connected by bolts or welded around the periphery.

[0071] When the unit produces air-conditioning chilled water alone, the chilled water circulation pump 84 is started, and the low-temperature and low-pressure liquid refrigerant evaporates in the evaporator 44 to absorb heat and provide chilled water for the air-conditioning system. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat in the water heater 61 and the condenser 54. Five cooling methods, namely evaporative cooling, air cooling, water cooling, mixed cooling of evaporative cooling and water cooling, and mixed cooling of air cooling and water cooling, are used to discharge the condensation heat of the refrigerant. The cooling method to be used should be determined based on factors such as the heat load discharged, climatic conditions, and the temperature of the external water source. The refrigerant circulation process is: compressor 1→water heater 61→condenser 54→liquid storage tank 7→drying filter 6→liquid indicator mirror 5→throttle 4→evaporator 44→gas-liquid separator 8→compressor 1.

[0072] When evaporative cooling is adopted, the exhaust fan 22 and the circulating water pump 17 are started, the valves 38 and 42 are opened, the valves 39, 40 and 41 are closed, the heat-insulating baffles 60 and 65 are removed, the exhaust duct valve 51, the evaporator air inlet 46, the evaporator air outlet 50 and the condenser air outlet 55 are closed, and the condenser air inlet 52 is opened. The spray water circulation process is: water collecting tank 43→valve 38→circulating water pump 17→valve 42→sprinkler 21→outer surface of water heater 61→outer surface of condenser 54→water collecting tank 43, and the wind flow is: condenser air inlet 52→condenser air inlet 53→condenser 54→water heater 61→sprinkler 21→water retaining folding plate 66→exhaust fan 22. The spray water evaporates and absorbs heat on the outer surfaces of water heater 61 and condenser 54, and the high-temperature and high-pressure gaseous refrigerant condenses and cools down in the tube, and the condensation heat is discharged into the atmosphere by the exhaust fan 22.

[0073] When air cooling is adopted, the exhaust fan 22 is started, the spray system is not working, the heat preservation partitions 60 and 65 are removed, the exhaust duct valve 51, the evaporator air inlet 46, the evaporator air outlet 50, and the condenser air outlet 55 are closed, and the condenser air inlet 52 is opened. The air flow is the same as above. The cold air blows through the outer surface of the water heater 61 and the condenser 54, and exchanges heat with the high-temperature and high-pressure gaseous refrigerant in the tube. The refrigerant condenses and cools down, and the condensation heat is discharged into the atmosphere by the exhaust fan 22.

[0074] When water cooling is adopted, the exhaust fan 22 and the circulating water pump 17 do not work, valves 87, 88, 89, 91, 33 and 34 are opened, and the other valves are closed. The external water source enters the condenser 54 and the water heater 61, exchanges heat with the high-temperature and high-pressure gaseous refrigerant, and discharges the condensation heat of the refrigerant into the external water source. The flow of cooling water is: valve 34→valve 91→hot water distribution tank 62→water heater 61→hot water collecting tank 63→valve 87→valve 33, valve 34→valve 89→cooling water distribution tank 56→condenser 54→cooling water collecting tank 57→valve 88→valve 33.

[0075] When evaporative cooling and water cooling are mixed, the exhaust fan 22 and circulating water pump 17 are started, valves 38, 42, 87, 88, 89, 91, 33, and 34 are opened, the other valves are closed, the heat-insulating baffles 60 and 65 are removed, the exhaust duct valve 51, the evaporator air inlet 46, the evaporator air outlet 50, and the condenser air outlet 55 are closed, and the condenser air inlet 52 is opened. The spray water circulation process, the wind process, and the cooling water process are the same as above. The spray water evaporates and absorbs heat on the outer surface of the water heater 61 and the condenser 54, and the high-temperature and high-pressure gaseous refrigerant condenses and cools down in the tube. A part of the condensation heat is discharged into the atmosphere by the exhaust fan 22; the external water source enters the condenser 54 and the water heater 61, exchanges heat with the high-temperature and high-pressure gaseous refrigerant, and discharges another part of the refrigerant condensation heat into the external water source.

[0076] When mixed cooling of air cooling and water cooling is adopted, the exhaust fan 22 is started, the circulating water pump 17 does not work, valves 87, 88, 89, 91, 33, 34 are opened, the other valves are closed, the heat preservation partitions 60, 65 are removed, the exhaust duct valve 51, the evaporator air inlet 46, the evaporator air outlet 50, and the condenser air outlet 55 are closed, and the condenser air inlet 52 is opened. The flow of wind and the flow of cooling water are the same as above. The cold wind blows through the outer surface of the water heater 61 and the condenser 54, and exchanges heat with the high-temperature and high-pressure gaseous refrigerant in the tube. The refrigerant condenses and cools down, and a part of the condensation heat is discharged into the atmosphere by the exhaust fan 22; the external water source enters the condenser 54 and the water heater 61, exchanges heat with the high-temperature and high-pressure gaseous refrigerant, and discharges another part of the refrigerant condensation heat into the external water source.

[0077] When the unit produces hot water for air conditioning alone, the heating water circulation pump 85 is started, the high-temperature and high-pressure gaseous refrigerant condenses and releases heat in the condenser 54 to provide hot water for air conditioning, and the low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 44, using five heat absorption methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to absorb heat from the air or external water source. The refrigerant cycle process is: compressor 1 → water heater 61 → condenser 54 → liquid storage tank 7 → filter drying 6 → liquid indicator 5 → throttle 4 → evaporator 44 → gas-liquid separator 8 → compressor 1.

[0078] When evaporative cooling is used to absorb heat, the exhaust fan 22 and the circulating water pump 17 are started, the valves 39 and 40 are opened, and the rest are closed. The evaporator air inlet 46, the evaporator air outlet 50, and the exhaust duct valve 51 are opened, and the condenser air inlet 52 and the condenser air outlet 55 are closed. The spray water circulation process is: water collecting tank 19→valve 39→circulating water pump 17→valve 40→sprinkler 21→outer surface of evaporator 44→water collecting tank 19, and the wind process is: evaporator air inlet 46→evaporator air inlet 45→outer surface of evaporator 44→evaporator air outlet 50→exhaust duct valve 51→water retaining flap 66→exhaust fan 22. The spray water is sprayed on the outer surface of the evaporator 44, and heat is released through hot air condensation, the refrigerant absorbs heat, the air is cooled, and finally discharged into the atmosphere by the exhaust fan 22. The above-mentioned spray water exchanges heat on the outer surface of the evaporator 44. When the evaporator 44 adopts a shell-and-tube heat exchanger, when the refrigerant runs in the inner tube, it also needs to exchange heat with the outer surface through the water in the outer tube, and the heat exchange efficiency is low. The spray water can be passed into the outer tube to directly exchange heat with the refrigerant in the inner tube. The spray water circulation process is: water collecting tank 19→valve 39→circulating water pump 17→valve 93→frozen water water collecting tank 47→inside evaporator 44→frozen water collecting tank 48→valve 93→spray head 21→outer surface of evaporator 44→water collecting tank 19, so that the heat exchange is more sufficient. Similarly, the spray pipe is connected to the cooling water collecting tank 57, and the spray water can also enter the inside of the condenser 54 to exchange heat with the high-temperature and high-pressure gaseous refrigerant.

[0079] When air cooling is used to absorb heat, the exhaust fan 22 is started, the spray system does not work, the evaporator air inlet 46, the evaporator air outlet 50, and the exhaust duct valve 51 are opened, the condenser air inlet 52 and the condenser air outlet 55 are closed, and the wind flow is the same as above. The hot air exchanges heat with the surface of the evaporator 44, and the low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 44. The air is cooled and finally discharged into the atmosphere by the exhaust fan 22.

[0080] When water cooling is used to absorb heat, the exhaust fan 22 and the circulating water pump 17 do not work, valves 33, 34, 90, and 92 are opened, and the remaining valves are closed. The external water source is connected to the evaporator 44, and the heat source water exchanges heat with the low-temperature and low-pressure liquid refrigerant. The refrigerant evaporates and absorbs heat, and the heat source water is cooled and finally discharged into the external water source. The heat source water flow is: valve 34→valve 90→chilled water water tank 47→evaporator 44→chilled water collecting tank 48→valve 92→valve 33.

[0081] When evaporative cooling and water cooling are used to absorb heat, the exhaust fan 22 and circulating water pump 17 are started, valves 33, 34, 39, 40, 90, 92 are opened, and the rest are closed, the evaporator air inlet 46, the evaporator air outlet 50, and the exhaust duct valve 51 are opened, the condenser air inlet 52, and the condenser air outlet 55 are closed, and the spray water circulation process, wind process, and heat source water process are the same as above. The spray water is sprayed on the outer surface of the evaporator 44, and the heat is released by condensation of the hot air. The refrigerant absorbs part of the heat, the air is cooled, and finally discharged into the atmosphere by the exhaust fan 22. The heat source water of the external water source enters the inside of the evaporator 44, and the refrigerant absorbs part of the heat again.

[0082] When a mixed cooling method of air cooling and water cooling is adopted, the exhaust fan 22 is started, the spray system does not work, valves 33, 34, 90, and 92 are opened, and the other valves are closed. The evaporator air inlet 46, the evaporator air outlet 50, and the exhaust duct valve 51 are opened, and the condenser air inlet 52 and the condenser air outlet 55 are closed. The external water source is connected to the inside of the evaporator 44, and the hot air blows over the surface of the evaporator 44. The wind flow and the heat source water flow are the same as above. The low-temperature and low-pressure liquid refrigerant exchanges heat with the hot air and the heat source water at the same time, and evaporates and absorbs heat.

[0083] When the unit is used to produce domestic hot water alone, the hot water circulation pump 86 is started, the high-temperature and high-pressure gaseous refrigerant condenses and releases heat in the water heater 61 to provide domestic hot water, and the low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 44, using five heat absorption methods: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to absorb heat from the air or external water source. The refrigerant cycle process is: compressor 1 → water heater 61 → condenser 54 → liquid storage tank 7 → filter drying 6 → liquid indicator 5 → throttle 4 → evaporator 44 → gas-liquid separator 8 → compressor 1. The unit's operating conditions are the same as those when it produces air-conditioning hot water alone.

[0084] When the unit produces air-conditioning chilled water and domestic hot water at the same time, the chilled water circulation pump 84 and the hot water circulation pump 86 are started, and the low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 44 to provide chilled water for the air-conditioning system. The high-temperature and high-pressure gaseous refrigerant condenses and releases heat in the water heater 61 to provide domestic hot water. Five methods of evaporative cooling, air cooling, water cooling, mixed cooling of evaporative cooling and water cooling, and mixed cooling of air cooling and water cooling are used to discharge heat or absorb heat to the air and external water source. Whether to use the condenser 54 should be determined according to the matching of the air-conditioning refrigeration load and the hot water load.

[0085] When the air conditioning refrigeration load is equal to the hot water load, the spray system and the condenser 54 do not work.

[0086] When the air conditioning refrigeration load is greater than the hot water load, the condenser 54 is used to dissipate heat to the air or external water source using the above five heat dissipation methods. At this time, domestic hot water is produced through the water heater 61 while heat is dissipated through the condenser 54.

[0087] When the air conditioning refrigeration load is less than the hot water load, the evaporator 44 is used to absorb heat from the air or the external water source. The low-temperature and low-pressure liquid refrigerant in the evaporator 44 absorbs heat through evaporation of the chilled water while absorbing heat from the air or the external water source through the above five heat absorption methods.

[0088] When the unit produces hot water for air conditioning and domestic hot water at the same time, the heating water circulation pump 85 and the hot water circulation pump 86 are started, and the high-temperature and high-pressure gaseous refrigerant condenses and releases heat in the condenser 54 and the water heater 61 to provide hot water for air conditioning and domestic hot water. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 44, and absorbs heat from the air and external water source in five ways: evaporative cooling, air cooling, water cooling, mixed cooling of evaporative cooling and water cooling, and mixed cooling of air cooling and water cooling.

[0089] When the unit produces air-conditioning chilled water and air-conditioning hot water at the same time, the chilled water circulation pump 84 and the heating water circulation pump 85 are started, the high-temperature and high-pressure gaseous refrigerant condenses and releases heat in the water heater 61 to provide domestic hot water, and the low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 44 to provide air-conditioning chilled hot water. The evaporator 44 and the condenser 54 use five methods of evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to dissipate or absorb heat to the air and external water source. When the air-conditioning refrigeration load is equal to the air-conditioning hot water load, the exhaust fan 22 and the spray system do not work; when the air-conditioning refrigeration load is greater than the air-conditioning hot water load, the condenser 54 is used to dissipate heat to the air or external water source in the above five ways; when the air-conditioning refrigeration load is less than the air-conditioning hot water load, the evaporator 44 is used to absorb heat from the air or external water source, and the low-temperature and low-pressure liquid refrigerant of the evaporator 44 absorbs heat through the evaporation of chilled water while absorbing heat from the air or external water source through the above five heat absorption methods.

[0090] When the unit produces air-conditioning chilled water, air-conditioning hot water and domestic hot water at the same time, the chilled water circulation pump 84, the heating water circulation pump 85 and the hot water circulation pump 86 are started, and the high-temperature and high-pressure gaseous refrigerant condenses and releases heat in the condenser 54 and the water heater 61 to provide air-conditioning hot water and domestic hot water. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 44 to provide air-conditioning chilled hot water. The evaporator 44 and the condenser 54 use five methods of evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling to dissipate or absorb heat to the air and external water source. When the air-conditioning cooling load is equal to the air-conditioning hot water load and the domestic hot water load, the exhaust fan 22 and the spray system do not work; when the air-conditioning cooling load is greater than the air-conditioning hot water load and the domestic hot water load, the condenser 54 is used to dissipate heat to the air or the external water source in the above five ways; when the air-conditioning cooling load is less than the air-conditioning hot water load and the domestic hot water load, the evaporator 44 is used to absorb heat from the air or the external water source, and the low-temperature and low-pressure liquid refrigerant of the evaporator 44 absorbs heat through the evaporation of the chilled water while absorbing heat from the air or the external water source through the above five heat absorption methods.

[0091] When the unit uses cold air to produce chilled water in winter, valves 33 and 34 are opened, or the chilled water circulation pump 84 is started, and the external water source is connected to the condenser 54, the water heater 61, and the evaporator 44. Evaporative cooling and air cooling are used to discharge heat into the air. The exhaust fan 22 and the circulating water pump 17 are started, and the water is cooled by the natural cold source. There is no need to start the refrigeration system, which achieves significant energy saving. It can be used for heat dissipation in the data center in winter.

[0092] The above is only the preferred implementation method of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change and modification made to the above implementation method based on the technical essence of the utility model shall fall within the protection scope of the utility model.

Claims

1. A trigeneration unit using a heat source tower, which includes a refrigeration system, a spray system, an evaporative cooling heat exchange system, a chilled water circulation pump, a heating water circulation pump, a hot water circulation pump, an exhaust fan, and a shell, and is characterized in that: The refrigeration system is a single cooling system, which includes a compressor, a dual-cold source condenser, a dual-heat source evaporator, and a throttle. The dual-cold source condenser includes a hot water heat exchanger and a cooling water heat exchanger. The dual-cold source evaporator includes a chilled water heat exchanger and a heat source water heat exchanger; the spray system includes a circulating water pump, a nozzle, and a water collecting tank; the evaporative cooling heat exchange system includes an evaporative cooling heat exchanger and a circulating water pump; the refrigeration system, the spray system, and the evaporative cooling heat exchange system are installed in a shell with a supporting frame inside. The exhaust fan is installed above the shell, the spray pipe and the nozzle are below the exhaust fan, the evaporative cooling heat exchanger is installed below the nozzle, and the water collecting tank is installed below the evaporative cooling heat exchanger. The compressor, the dual-cold source condenser, the dual-heat source evaporator, the chilled water circulating water pump, the heating water circulating water pump, the hot water circulating water pump, the spray system circulating water pump, and the evaporative cooling heat exchange system circulating water pump are installed below the water collecting tank; the dual-cold source condenser is a double-pipe or double-channel heat exchanger with a hot water inlet pipe, a hot water outlet pipe, and a cooling water inlet pipe. The double heat source evaporator is a double water pipe or double water channel heat exchanger, which is provided with a chilled water inlet pipe, a chilled water outlet pipe, a heat source water inlet pipe and a heat source water outlet pipe; the cooling water heat exchanger inlet and outlet pipes of the double cold source condenser, the heat source water heat exchanger inlet and outlet pipes of the double heat source evaporator, the spray system, the evaporative cooling heat exchange system and the external water source are connected to each other, the cooling water heat exchanger of the double cold source condenser is also connected to the air conditioning heating system, its hot water heat exchanger is connected to the domestic hot water system, the chilled water heat exchanger of the double cold source evaporator is connected to the air conditioning chilled water system, the chilled water circulating water pump is connected to the chilled water heat exchanger of the double heat source evaporator, the heating water circulating water pump is connected to the cooling water heat exchanger of the double cold source condenser, the hot water circulating water pump is connected to the hot water heat exchanger of the double cold source condenser, the hot water heat exchanger of the double cold source condenser, the chilled water heat exchanger and the heat source water heat exchanger of the double cold source evaporator are mixed, connected in parallel or connected in series with respect to the refrigerant.

2. A trigeneration unit using a heat source tower, which includes a refrigeration system, a spray system, an evaporative cooling heat exchange system, a chilled water circulation pump, a heating water circulation pump, a hot water circulation pump, an exhaust fan, and a shell, and is characterized in that: The refrigeration system is a single cooling system, which includes a compressor, a dual-cold source condenser, a dual-heat source evaporator, and a throttle; the spray system includes a circulating water pump, a nozzle, and a water collecting tank; the evaporative cooling heat exchange system includes an evaporative cooling heat exchanger and a circulating water pump; the refrigeration system, the spray system, and the evaporative cooling heat exchange system are installed in a shell with a supporting frame inside. The exhaust fan is installed above the shell, the spray pipe and the nozzle are below the exhaust fan, the evaporative cooling heat exchanger is installed below the nozzle, and the water collecting tank is installed below the evaporative cooling heat exchanger. The compressor, the dual-cold source condenser, the dual-heat source evaporator, the chilled water circulating water pump, the heating water circulating water pump, the hot water circulating water pump, the spray system circulating water pump, and the evaporative cooling heat exchange system circulating water pump are installed in the water collecting The double cold source condenser and double cold source evaporator adopt single water pipe or single water channel heat exchanger, the hot water inlet pipe, hot water outlet pipe, cooling water inlet pipe and cooling water outlet pipe of the double cold source condenser share one inlet and outlet pipe; the chilled water inlet pipe, chilled water outlet pipe, heat source water inlet pipe and heat source water outlet pipe of the double heat source evaporator share one inlet and outlet pipe; the inlet and outlet pipes of the double cold source condenser, the inlet and outlet pipes of the double heat source evaporator, the spray system, the evaporative cooling heat exchange system and the external water source are connected to each other, the double cold source condenser is also connected to the air conditioning heating system and the domestic hot water system, the chilled water circulation pump is connected to the double heat source evaporator, and the heating water circulation pump and the hot water circulation pump are connected to the double cold source condenser.

3. A trigeneration unit using a heat source tower, which includes a refrigeration system, a spray system, an evaporative cooling heat exchange system, a chilled water circulation pump, a heating water circulation pump, a hot water circulation pump, an exhaust fan, and a shell, and is characterized in that: The refrigeration system is a single cooling system, which includes a compressor, a dual-cold source condenser, a dual-heat source evaporator, and a throttle. The dual-cold source condenser includes a hot water heat exchanger and a cooling water heat exchanger; the spray system includes a circulating water pump, a nozzle, and a water collecting tank; the evaporative cooling heat exchange system includes an evaporative cooling heat exchanger and a circulating water pump; the refrigeration system, the spray system, and the evaporative cooling heat exchange system are installed in a shell with a supporting frame inside. The exhaust fan is installed above the shell, the spray pipe and the nozzle are below the exhaust fan, the evaporative cooling heat exchanger is installed below the nozzle, and the water collecting tank is installed below the evaporative cooling heat exchanger. The compressor, the dual-cold source condenser, the dual-heat source evaporator, the chilled water circulating water pump, the heating water circulating water pump, the hot water circulating water pump, the spray system circulating water pump, and the evaporative cooling heat exchange system circulating water pump are installed below the water collecting tank; the dual-cold source condenser is a double-pipe or double-channel heat exchanger, which has a hot water inlet pipe, a hot water outlet pipe, Cooling water inlet pipe and cooling water outlet pipe; the dual heat source evaporator is a single water pipe or a single water channel heat exchanger, and the chilled water inlet pipe, chilled water outlet pipe, heat source water inlet pipe and heat source water outlet pipe of the dual heat source evaporator share an inlet and outlet pipe; the cooling water heat exchanger inlet and outlet pipes of the dual cold source condenser, the inlet and outlet pipes of the dual heat source evaporator, the spray system, the evaporative cooling heat exchange system and the external water source are connected to each other, the cooling water heat exchanger of the dual cold source condenser is also connected to the air conditioning and heating system, its hot water heat exchanger is connected to the domestic hot water system, the dual cold source evaporator is connected to the air conditioning chilled water system, the chilled water circulating pump is connected to the dual heat source evaporator, the heating water circulating pump is connected to the cooling water heat exchanger of the dual cold source condenser, and the hot water circulating pump is connected to the hot water heat exchanger of the dual cold source condenser. The hot water heat exchanger and the cooling water heat exchanger of the dual cold source condenser are connected in mixed, parallel and series manners relative to the refrigerant.

4. A trigeneration unit using a heat source tower, which includes a refrigeration system, a spray system, a chilled water circulation pump, a heating water circulation pump, a hot water circulation pump, an exhaust fan, and a casing, and is characterized in that: The refrigeration system is a single cooling system, which includes a compressor, a condenser, a water heater, an evaporator, and a throttle. The condenser and the water heater are connected in parallel or in series in the refrigeration system. The condenser, the water heater, and the evaporator are multi-media heat exchangers with five heat exchange modes: evaporative cooling, air cooling, water cooling, evaporative cooling and water cooling mixed cooling, and air cooling and water cooling mixed cooling. The condenser outlet pipe is connected to the cooling water header tank, and the water inlet pipe is connected to the cooling water distribution tank. The water heater outlet pipe is connected to the hot water header tank, and the water inlet pipe is connected to the hot water distribution tank. The evaporator outlet pipe is connected to the chilled water header tank, and the water inlet pipe is connected to the chilled water distribution tank. The condenser, water heater, evaporator and water collection tank are surrounded by heat-insulating baffles; the spray system includes a circulating water pump, a nozzle and a water collection tank. The condenser, water heater and evaporator are all equipped with nozzles above, and share a circulating water pump and an exhaust fan, or the condenser, water heater and evaporator use their own circulating water pump and exhaust fan respectively; the refrigeration system, spray system and exhaust fan are installed in the shell and supported by the frame, the exhaust fan is installed above the shell, a water retaining folding plate and a nozzle are installed below the exhaust fan, and a water heater is installed below it, and a heat-insulating baffle is installed around it to form a heat exchange channel for the water heater; A nozzle is installed below the water heater, and a condenser is installed below it. A heat-insulating baffle is installed around it to form a condenser heat exchange channel. It has a condenser air inlet and an condenser air outlet, and is connected to the condenser air inlet on the shell. A water collecting tank is installed below the condenser, and the spray water flows into it. The box body is insulated; a nozzle is installed below the water collecting tank, and an evaporator is installed below it. A heat-insulating baffle is installed around it to form an evaporator heat exchange channel. It has an evaporator air inlet and an evaporator air outlet, and is connected to the evaporator air inlet on the shell. A water collecting tank is installed under the heater, and the spray water flows into it, and the box body is insulated; a compressor, a spray system circulating water pump, a chilled water circulating water pump, a heating water circulating water pump, and a hot water circulating water pump are installed under the water collecting tank; an exhaust duct is installed around the outer shell, the upper part of which is connected to the exhaust fan suction port, and the lower part is connected to the condenser outlet and the evaporator outlet; the chilled water circulating water pump is connected to the evaporator, the heating water circulating water pump is connected to the condenser, the hot water circulating water pump is connected to the water heater, and the external water source and the spray system are connected to the evaporator, the condenser and the water heater.

5. The trigeneration unit using a heat source tower according to claim 4 is characterized in that: The condenser, water heater and evaporator are plate-and-jacket heat exchangers, which include two flat jackets and a blown plate. The blown plate has a blown tube, in which the refrigerant flows. The blown plate has a refrigerant inlet tube and a refrigerant outlet tube, which are installed in the two flat jackets. Two sealed water chambers are formed between the blown plate and the two flat jackets, and cooling water passes through them to exchange heat with the refrigerant. The blown plate is fixed in the water chamber by a support. The two flat jackets are movably connected with bolts or welded around the periphery. The water chamber is connected with a water inlet tube and a water outlet tube. The refrigerant inlet tube and the refrigerant outlet tube pass through the weld edge and are led out of the flat jackets. Alternatively, two blown plates are used to form a water chamber between the two, and cooling water passes through it to exchange heat with the refrigerant. The two blown plates are movably connected with bolts or welded around the periphery.

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