Air conditioning system with double pipe heat exchanger

Abstract

The utility model discloses an air conditioning system with the heat exchanger of bushing includes heat pump system, water heat exchange system, and heat pump system includes condenser, evaporimeter, compressor, expansion throttler, four -way reversing valve, and condenser, evaporimeter is the heat exchanger of bushing, and the inner tube passes cooling water, and the outer tube passes refrigerant, and water heat exchange system includes condenser inner tube, evaporimeter inner tube, water heater, waste heat heat exchanger, circulating water pump, above -mentioned equipment and the inner tube of condenser, evaporimeter intercommunication, constitute water heat exchange system, and waste heat heat exchanger exchanges heat with domestic waste water, waste gas, has one and above, and is connected in water heat exchange system in parallel, and water heater is water -water heat exchanger, and waste heat heat exchanger and water heater are connected in water heat exchange system in parallel, through circulating water pump and heat pump circulation, various waste heat, waste gas in family are used for air conditioning, heating water, defrosting etc., and the comprehensive effective utilization of heat energy is obtained, and the heat exchanger of bushing can be air -cooled also can be water -cooled, and the heat exchange efficiency of wind -cooled heat exchanger is improved greatly, and the energy -conserving effect is remarkable.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning and refrigeration, and specifically relates to an air conditioning system with a shell-and-tube heat exchanger. Background Technology

[0002] Frosting of outdoor air conditioning units in winter is a common problem. Defrost-free operation can affect indoor heating. Electric defrosting consumes electricity, but households generate a lot of waste heat, such as bathing wastewater and high-temperature cooking fumes, which contain a lot of heat energy. This heat energy is not fully recovered and utilized, but is completely discharged, resulting in waste. Summary of the Invention

[0003] The purpose of this utility model is to provide an air conditioning system that can comprehensively utilize various waste heat generated in a household to provide air conditioning hot and cold water, domestic hot water, and defrosting.

[0004] The solution of this utility model is: an air conditioning system with a shell-and-tube heat exchanger, comprising a heat pump system and a water heat exchange system. The heat pump system includes a condenser, evaporator, compressor, expansion valve, and four-way reversing valve. The condenser and evaporator are shell-and-tube heat exchangers; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The refrigerant exchanges heat with the cooling water through the inner tube and with the air through the outer tube. The condenser acts as the outdoor unit, exchanging heat with the outdoor air, and the evaporator acts as the indoor unit, exchanging heat with the indoor air. The water heat exchange system includes an inner tube for the condenser, an inner tube for the evaporator, a water heater, a waste heat exchanger, a circulating water pump, an expansion tank, and valves. The circulating water pumps include a condenser circulating water pump and an evaporator circulating water pump. The above equipment is connected to the inner tubes of the condenser and evaporator to form the water heat exchange system. The inlet and outlet water pipes of the condenser inner tube have two return lines. Each loop has two valves and is connected to the condenser circulating water pump, water heater, and waste heat exchanger. By switching the valves, a heat dissipation loop or a heat absorption loop is formed. The inlet and outlet water pipes of the evaporator inner tube form a hot water loop with the evaporator circulating water pump, water heater, and valves, and are connected to the aforementioned heat absorption and heat dissipation loops through two valves. One or more waste heat exchangers exchange heat with domestic wastewater and exhaust gas, and are connected in parallel to the water heat exchange system. These are either water-to-water or water-to-gas heat exchangers. The water heater is a water-to-water heat exchanger. The waste heat exchangers and water heaters are connected in parallel to the water heat exchange system, each with its own valve. Through circulation by the circulating water pump, wastewater and exhaust gas exchange heat with the water in the water heat exchange system, and the refrigerant exchanges heat in the condenser and evaporator, transferring the heat energy of the wastewater and exhaust gas, as well as the refrigerant's condensation heat, to the condenser, evaporator, and water heater. By switching the valves, the flow direction of cooling water in the condenser inner tube and evaporator inner tube is opposite to the refrigerant flow direction, improving heat exchange efficiency.

[0005] When the heat pump system is in cooling cycle, the refrigerant in the outer tube of the evaporator evaporates and absorbs heat, sending cool air into the room. The evaporator circulating water pump stops, and there is no cooling water flowing through its shell-and-tube heat exchanger. The refrigerant in the outer tube of the condenser condenses and releases heat, and the condenser circulating water pump starts. Through valve switching, the heat dissipation circulation loop starts to operate. Cooling water flows through the inner tube of the condenser and then circulates through the water heater and waste heat exchanger. The heat of refrigerant condensation is used to preferentially heat the domestic hot water in the water heater. The remaining heat of refrigerant condensation is discharged into wastewater and exhaust gas through the waste heat exchanger and dissipated into the outdoor air through the outer tube of the condenser.

[0006] When the heat pump system is in heating cycle, the evaporator transforms into a condenser. The refrigerant in the outer pipe condenses and releases heat, sending hot air into the room. The evaporator circulating water pump starts, and the hot water circulation loop begins to operate. At the same time, the valve connected to the heat absorption circulation loop is closed. Cooling water flows through the inner pipe of the evaporator and then circulates through the water heater, using the heat of refrigerant condensation to heat the domestic hot water in the water heater. The condenser transforms into an evaporator, and the refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. The condenser circulating water pump starts, and the heat absorption circulation loop begins to operate. Cooling water flows through the inner pipe of the condenser and then circulates through the waste heat exchanger. The cooling water absorbs the heat energy from the waste water and waste gas in the waste heat exchanger and transfers it to the condenser.

[0007] When the outdoor condenser frosts up in winter, the heat pump system operates in heating cycle mode. The evaporator transforms into a condenser, and the refrigerant in the outdoor pipes condenses and releases heat, sending hot air into the room. The condenser then transforms into an evaporator, where the refrigerant in the outdoor pipes evaporates and absorbs heat from the outdoor air and cooling water. The condenser circulating water pump starts, while the evaporator circulating water pump stops. The heat absorption circulation loop begins operation and connects to the water heater, forming a defrosting circulation loop. The cooling water absorbs heat energy from the hot water in the water heater and also absorbs heat from wastewater and exhaust gas through the waste heat exchanger. The condenser circulating water pump circulates this heat energy to the condenser, where the refrigerant evaporates and absorbs the heat energy, reducing the amount of heat absorbed from the air. Under the blowing of the condenser fan, the frost will gradually melt. If the heat pump system is shut down, defrosting will be even faster.

[0008] When hot water needs to be produced separately in any season, the heat pump system operates in a heating cycle. The condenser transforms into an evaporator, absorbing heat from outdoor air, wastewater, and exhaust gas. The heat absorption cycle loop starts operating, and the waste heat exchanger absorbs heat from wastewater and exhaust gas, circulating it through the condenser's circulating water pump. This heat energy is then transferred to the condenser, and the evaporator transforms into a condenser, no longer supplying hot air to the room. The evaporator's circulating water pump starts, and the hot water circulation loop begins operating. Simultaneously, the valves connected to the heat absorption cycle loop are closed. All refrigerant condensation heat is used to heat domestic hot water. Various waste heat, exhaust gas, and other cold and heat sources are comprehensively and effectively utilized. The shell-and-tube heat exchanger can be both air-cooled and water-cooled, improving heat exchange efficiency by more than 30% compared to air-cooled heat exchangers, resulting in significant energy savings. Attached Figure Description

[0009] Figure 1 It is a shell-and-tube heat exchanger and air conditioning system. Figure 1 Figure 2 It is a shell-and-tube heat exchanger and air conditioning system. Figure 2 Figure 3 It is a shell-and-tube heat exchanger and air conditioning system. Figure 3 Figure 4 It is a shell-and-tube heat exchanger and air conditioning system. Figure 4 Figure 5 It is a shell-and-tube heat exchanger and air conditioning system. Figure 5 Figure 6 It is a shell-and-tube heat exchanger and air conditioning system. Figure 6 Figure 7 It is a shell-and-tube heat exchanger and air conditioning system. Figure 7 Figure 8 It is an outdoor structure. Figure 1 Figure 9 It is an outdoor structure. Figure 2 Figure 10 It is an outdoor structure. Figure 3 Explanation of reference numerals in the attached figures: 1. Compressor; 2. Four-way reversing valve; 3. Condenser; 4, 34, 35. Expansion valve; 5. Evaporator; 6. Gas-liquid separator; 7. Condenser fan; 8. Evaporator fan; 9, 10. Circulating water pump; 11, 12. Expansion tank; 13, 14. Waste heat exchanger; 15, 31. Water heater; 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30. Solenoid valve; 32. Air-cooled evaporator; 33. Three-way regulating valve; 36, 37. Water-cooled evaporator; 38. Manifold. Detailed Implementation

[0010] Figure 1An air conditioning system with a shell-and-tube heat exchanger includes a heat pump system and a water heat exchanger system. The heat pump system comprises a condenser 3, an evaporator 5, a compressor 1, an expansion valve 4, and a four-way reversing valve 2. The condenser 3 and evaporator 5 are shell-and-tube heat exchangers; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser 3 acts as the outdoor unit, exchanging heat with outdoor air, and the evaporator 5 acts as the indoor unit, exchanging heat with indoor air. The water heat exchanger system includes the inner tubes of the condenser 3 and evaporator 5, and hot water... The system includes condenser 15, waste heat exchangers 13 and 14, circulating water pumps 9 and 10, expansion tanks 11 and 12, and solenoid valves 16, 17, 18, 19, 20, 21, 22, 23, and 24. The circulating water pumps include condenser circulating water pump 9 and evaporator circulating water pump 10. These devices are connected to the inner pipes of condenser 3 and evaporator 5, forming a water heat exchange system. The inlet and outlet water pipes of condenser 3 have two loops, each loop equipped with two solenoid valves 16 and 19 and 17 and 18, which are connected to condenser circulating water pump 9. Water heater 15 and waste heat exchangers 13 and 14 are connected, forming a heat dissipation circulation loop or a heat absorption circulation loop by switching solenoid valves 16, 19 and 17, 18. The inlet and outlet water pipes of the evaporator 5 form a hot water circulation loop with the evaporator circulating water pump 10, water heater 15, and solenoid valve 24, and are connected to the above-mentioned heat absorption circulation loop and heat dissipation circulation loop through solenoid valves 20 and 21. Waste heat exchangers 13 and 14 exchange heat with domestic wastewater and exhaust gas. There are one or more of them connected in parallel in the water heat exchange system. Water heat exchanger, water-gas heat exchanger, waste heat heat exchanger 13 is a water-gas heat exchanger, waste heat heat exchanger 14 is a water-water heat exchanger, water heater 15 is a water-water heat exchanger. Waste heat heat exchangers 13 and 14 and water heater 15 are connected in parallel in the water heat exchange system and each has a solenoid valve. They are circulated by circulating water pumps 9 and 10. Wastewater and waste gas exchange heat with the water in the water heat exchange system. The refrigerant exchanges heat in condenser 3 and evaporator 5. The heat energy of wastewater and waste gas and the condensation heat of refrigerant are transferred to condenser 3, evaporator 5 and water heater 15.

[0011] Waste heat exchanger 14 is a water-to-water heat exchanger. The wastewater comes from bathing, washing, toilet flushing, laundry, etc. The temperature of the bathing wastewater is relatively high, so the heat energy can be recovered from it. The washing and laundry wastewater and toilet flushing water can be used to recover heat energy in winter and can also be used as cooling water in summer. Waste heat exchanger 13 is a water-to-air heat exchanger. The waste gas comes from high-temperature oil fumes and toilet exhaust. The heat energy of the high-temperature oil fumes can be recovered using a water-to-air heat exchanger. The heat energy of the toilet exhaust can be recovered in winter and can also be used for cooling in summer. Waste heat exchangers 13 and 14, and water heater 15 can employ heat exchangers in the form of serpentine tubes, spiral tubes, or shell-and-tube structures. For example, serpentine tubes or spiral tubes can be placed in a toilet tank to heat tap water or absorb heat from it, ultimately used for flushing. Alternatively, serpentine tube, spiral tube, or shell-and-tube heat exchangers can be connected to the drain pipe of a washing machine, allowing the washing wastewater to exchange heat with the cooling water, either releasing heat to the wastewater or absorbing heat from it. A box with a serpentine tube or spiral tube heat exchanger can be placed on the ground below a showerhead, allowing people to stand on it while showering; the wastewater from the shower flows into the box, where the cooling water can absorb the heat energy. Since the high-temperature refrigerant indirectly heats domestic hot water through the cooling water, the hot water temperature is unlikely to reach above 50°C. Therefore, water heater 15 should ideally be equipped with auxiliary electric heating. Water heater 15 can also serve as a preheating device for a gas water heater.

[0012] When the heat pump system is in refrigeration cycle, the refrigerant flow is: compressor 1 → four-way reversing valve 2 → condenser 3 → expansion valve 4 → evaporator 5 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → solenoid valve 16 → condenser 3 → solenoid valve 19, then splits into two paths: one path: solenoid valve 20 → water heater 15 → solenoid valve 21 → circulating water pump 9; the other path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. Finally, the two paths merge back to circulating water pump 9, completing one cycle. At this time, solenoid valves 17, 18, and 24 are closed. The refrigerant in the outer tube of evaporator 5 evaporates and absorbs heat, sending cool air into the room. Evaporator circulating water pump 10 stops, and there is no cooling water flowing through its shell-and-tube heat exchanger. The refrigerant in the outer tube of condenser 3 condenses and releases heat, and condenser circulating water pump 9 starts. Through the switching of the solenoid valve, the heat dissipation circulation loop starts to operate. Cooling water flows through the inner tube of condenser 3, using the heat of refrigerant condensation to preferentially heat the domestic hot water of water heater 15. The remaining heat of refrigerant condensation is discharged into wastewater and waste gas through waste heat exchangers 13 and 14, and dissipates heat to the outdoor air through the outer tube of condenser 3.

[0013] When the heat pump system is in heating cycle, the refrigerant flow is: compressor 1 → four-way reversing valve 2 → evaporator 5 → expansion valve 4 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is a two-way circulation: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9, at which time solenoid valves 16 and 19 are closed; circulating water pump 10 → evaporator 5 → water heater 15 → solenoid valve 24 → circulating water pump 10, at which time solenoid valves 20 and 21 are closed. Evaporator 5 transforms into condenser, the refrigerant in the outer pipe condenses and releases heat, sending hot air into the room. Evaporator circulating water pump 10 starts, and the hot water circulation loop begins to operate. At the same time, solenoid valves 20 and 21 connected to the heat absorption circulation loop are closed. Cooling water circulates through the inner pipe of evaporator 5 and flows through water heater 15, using the heat of refrigerant condensation to heat the domestic hot water in water heater 15. Condenser 3 transforms into evaporator, the refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. Condenser circulating water pump 9 starts, and the heat absorption circulation loop begins to operate. Cooling water circulates through the inner pipe of condenser 3 and then flows through waste heat exchangers 13 and 14. The cooling water absorbs the heat energy from wastewater and waste gas from waste heat exchangers 13 and 14 and transfers it to condenser 3.

[0014] When the outdoor condenser 3 frosts in winter, the heat pump system's heating cycle can defrost without stopping. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → evaporator 5 → expansion throttle 4 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17, then splits into two paths: one path: solenoid valve 20 → water heater 15 → solenoid valve 21 → circulating water pump 9; the other path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. Finally, the two paths merge back into circulating water pump 9, completing one cycle. At this time, solenoid valves 16, 19, and 24 are closed. Condenser 3 transforms into evaporator. The refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. Condenser circulating water pump 9 starts, initiating the heat absorption circulation loop and connecting to water heater 15 to form a defrosting circulation loop. Cooling water absorbs heat energy from domestic hot water in water heater 15 and absorbs heat from wastewater and waste gas through waste heat exchangers 13 and 14. This heat energy is then transferred to condenser 3 via condenser circulating water pump 9, where the refrigerant evaporates and absorbs heat, reducing the heat absorbed from the air. Under the blowing of condenser fan 7, the frost gradually melts. Simultaneously, evaporator circulating water pump 10 stops, and evaporator 5 delivers hot air into the room without affecting indoor heating. If the heat pump system stops operating, the heat energy from waste heat exchangers 13 and 14 and water heater 15 can be used for rapid defrosting.

[0015] When hot water needs to be produced separately in any season, the heat pump system's heating cycle, and the refrigerant flow is: Compressor 1 → Four-way reversing valve 2 → Evaporator 5 → Expansion valve 4 → Condenser 3 → Four-way reversing valve 2 → Gas-liquid separator 6 → Compressor 1. The cooling water flow is a two-way circulation: Circulating water pump 9 → Solenoid valve 18 → Condenser 3 → Solenoid valve 17 → Solenoid valve 22 → Waste heat exchanger 14 (parallel solenoid valve 23 → Waste heat exchanger 13) → Circulating water pump 9, at which time solenoid valves 16 and 19 are closed; Circulating water pump 10 → Evaporator 5 → Water heater 15 → Solenoid valve 24 → Circulating water pump 10, at which time solenoid valves 20 and 21 are closed. Condenser 3 transforms into evaporator, absorbing heat from outdoor air, wastewater, and exhaust gas. The heat absorption circulation loop starts operating. Waste heat exchangers 13 and 14 absorb heat from wastewater and exhaust gas, which is then circulated through condenser circulating water pump 9, transferring the heat energy to condenser 3. Evaporator 5 transforms into condenser, no longer supplying hot air to the room. Evaporator circulating water pump 10 starts, and the hot water circulation loop begins operating. At the same time, solenoid valves 20 and 21 connected to the heat absorption circulation loop are closed. All the refrigerant condensation heat heats the domestic hot water in water heater 15. Therefore, various wastewater and exhaust gas in the household are comprehensively and effectively utilized, resulting in significant energy savings.

[0016] Since evaporator 5 is a shell-and-tube heat exchanger, it is suitable for use in larger indoor cabinet air conditioners. By adjusting the valves, the flow direction of cooling water in the inner tubes of condenser 3 and evaporator 5 is opposite to the refrigerant flow direction, improving heat exchange efficiency. Variable frequency pumps are recommended for circulating water pumps 9 and 10. The cooling water for the hot water exchange system is pure water, which does not scale; antifreeze should be added to prevent the outdoor unit condenser 3 from freezing in winter. Expansion tanks 11 and 12 should be higher than the system level to replenish pure water to the hot water exchange system. Solenoid valves 21, 22, 23, and 24 can be electrically or manually adjustable to regulate the cooling water flow according to the heating and cooling load. Because waste heat and waste gas are not continuous but randomly generated, sensors are needed to control the opening and closing of the solenoid valves, and an intelligent control device is required to control the effective operation of the system.

[0017] Figure 2The air conditioning system with a shell-and-tube heat exchanger includes a refrigeration system and a water heat exchange system. The refrigeration system is a single-cooling system with unidirectional refrigerant circulation. It includes a condenser 3, an evaporator 5, a compressor 1, and an expansion valve 4. The condenser 3 and evaporator 5 are shell-and-tube heat exchangers; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser 3 acts as the outdoor unit, exchanging heat with outdoor air, while the evaporator 5 acts as the indoor unit, exchanging heat with indoor air. The water heat exchange system includes the inner tubes of the condenser 3 and evaporator 5, a water heater 15, waste heat exchangers 13 and 14, circulating water pumps 9 and 10, an expansion tank 11 and 12, and solenoid valves 22, 23, 25, 26, 27, 28, and 29. The circulating water pumps include a condenser circulating water pump 9 and an evaporator circulating water pump 10. All of the above equipment is connected to the inner tubes of the condenser 3 and evaporator 5, forming the water heat exchange system. The condenser 3's inner pipe inlet and outlet water pipes, water heater 15, waste heat exchangers 13 and 14, circulating water pump 9, expansion tank 11, and solenoid valves 22, 23, 25, 28, and 29 form a heat dissipation circulation loop to release condensation heat. The condenser 3's inner pipe inlet and outlet water pipes, water heater 15, circulating water pump 9, expansion tank 11, and solenoid valve 29 form a hot water circulation loop. Simultaneously, the evaporator 5's inner pipe inlet and outlet water pipes, waste heat exchangers 13 and 14, circulating water pump 10, expansion tank 12, and solenoid valves 22, 23, 26, and 27 form a heat absorption circulation loop. The hot water circulation loop and the heat absorption circulation loop are disconnected by solenoid valves 25 and 28, using condensation heat to heat the domestic hot water in water heater 15. There is one or more waste heat exchangers 13 and 14 connected in parallel in the water heat exchange system. They are water-to-water heat exchangers and water-to-gas heat exchangers. Waste heat exchanger 13 is a water-to-gas heat exchanger, waste heat exchanger 14 is a water-to-water heat exchanger, and water heater 15 is a water-to-water heat exchanger. Waste heat exchangers 13 and 14 and water heater 15 are connected in parallel in the water heat exchange system and each has a solenoid valve. They are circulated by circulating water pumps 9 and 10. Wastewater and waste gas exchange heat with the water in the water heat exchange system. The refrigerant exchanges heat in condenser 3 and evaporator 5. The heat energy of wastewater and waste gas and the condensation heat of refrigerant are transferred to condenser 3, evaporator 5 and water heater 15.

[0018] Because the refrigeration system is a single-cooling system with a year-round refrigeration cycle, the refrigerant flow is: compressor 1 → condenser 3 → expansion valve 4 → evaporator 5 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → condenser 3, then splits into two paths: one path: solenoid valve 29 → water heater 15 → circulating water pump 9; the other path: solenoid valve 25 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → solenoid valve 28 → circulating water pump 9. Finally, the two paths merge back into circulating water pump 9, completing one cycle. At this point, solenoid valves 26 and 27 are closed. The refrigerant in the outer tube of evaporator 5 evaporates and absorbs heat, sending cool air into the room. The circulating water pump 10 stops, and there is no cooling water flowing through its shell-and-tube heat exchanger. The refrigerant in the outer tube of condenser 3 condenses and releases heat, and the circulating water pump 9 starts. Cooling water passes through the inner tube of condenser 3, using the heat of refrigerant condensation to preferentially heat the domestic hot water in water heater 15. The remaining heat of refrigerant condensation is discharged into wastewater and waste gas through waste heat exchangers 13 and 14, and dissipates heat to the outdoor air through the outer tube of condenser 3.

[0019] When hot water needs to be produced separately in any season, the refrigerant circulation process remains unchanged. The cooling water circulation is two-way: one is from circulating water pump 9 to condenser 3, then to solenoid valve 29, water heater 15, and finally back to circulating water pump 9; the other is from circulating water pump 10 to solenoid valve 26, solenoid valve 22, waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) to solenoid valve 27, then back to evaporator 5, and finally back to circulating water pump 10. Solenoid valves 25 and 28 are closed, and the refrigerant in the outer pipe of evaporator 5 evaporates and absorbs heat. Cool air is supplied to the room. Cooling water absorbs heat energy from wastewater and exhaust gas in waste heat exchangers 13 and 14 and transfers it to evaporator 5. Evaporator 5 absorbs heat from indoor air and cooling water, and through the refrigeration cycle, the refrigerant condensation heat is transferred to condenser 3. Then, through the circulating water pump 9, all the refrigerant condensation heat heats the domestic hot water in water heater 15. At this time, condenser fan 8 stops. To prevent condenser 3 from dissipating heat to the outside, the outdoor unit can be equipped with an electric air inlet, which is closed at this time. This single-cooling air conditioning system is suitable for use in southern regions that require cooling all year round.

[0020] Figure 3The air conditioning system with a shell-and-tube heat exchanger includes a heat pump system and a water heat exchange system. The heat pump system comprises a condenser 3, a water heater 31, an air-cooled evaporator 32, a compressor 1, an expansion valve 4, a four-way reversing valve 2, and a three-way regulating valve 33. The condenser 3 is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser 3 serves as the outdoor unit for heat exchange with outdoor air, and the air-cooled evaporator 32 serves as the indoor unit for heat exchange with indoor air. The water heat exchange system includes the inner tube of the condenser 3, the water heater 31, waste heat exchangers 13 and 14, a circulating water pump 9, an expansion tank 11, and solenoid valves 16, 17, and 18. The above-mentioned devices 16, 19, 22, 23, and 30 are connected to the inner tube of condenser 3 to form a water heat exchange system. The inlet and outlet water pipes of the inner tube of condenser 3 have two loops, each loop having two solenoid valves 16, 19 and 17, 18. The inlet and outlet water pipes of the inner tube of condenser 3, condenser circulating water pump 9, water heater 31, waste heat exchangers 13, 14, and solenoid valves 16, 19, 22, 23, and 30 form a heat dissipation circulation loop to discharge condensation heat and heat domestic hot water; the inlet and outlet water pipes of the inner tube of condenser 3, condenser circulating water pump 9, waste heat exchangers 13, 14, and solenoid valves 17, 18, 22, and 23 form a heat absorption circulation loop to heat domestic hot water. There is one or more waste heat exchangers 13 and 14 connected in parallel in the water heat exchange system. These are water-to-water heat exchangers and water-to-air heat exchangers. Waste heat exchanger 13 is a water-to-air heat exchanger, and waste heat exchanger 14 is a water-to-water heat exchanger. The water heater 31 is a combination of a water-to-water heat exchanger and a water-to-refrigerant heat exchanger, and can use heat exchangers in the form of serpentine tubes, spiral tubes, shell and tubes, etc. Its water-to-water heat exchanger is connected to the water heat exchange system, and its water-to-refrigerant heat exchanger is connected to the heat pump system. The waste heat exchangers 13 and 14 are connected in parallel with the air-cooled evaporator 32 in the heat pump system via a three-way regulating valve 33. The waste heat exchangers 13 and 14 are connected in parallel with the water heater 31 in the water heat exchange system, and each has a solenoid valve. The waste water and waste gas are circulated by the circulating water pump 9. The waste water and waste gas exchange heat with the water in the water heat exchange system. The refrigerant exchanges heat in the condenser 3, the air-cooled evaporator 32, and the water heater 31, transferring the heat energy of the waste water and waste gas and the condensation heat of the refrigerant to the condenser 3, the air-cooled evaporator 32, and the water heater 31.

[0021] When the heat pump system is in cooling cycle, the valve port connected to the three-way regulating valve 33 and the water heater 31 is closed, while the valve port connected to the air-cooled evaporator 32 is fully open. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → condenser 3 → expansion throttle 4 → air-cooled evaporator 32 → three-way regulating valve 33 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → solenoid valve 16 → condenser 3 → solenoid valve 19, then splits into two paths: one path: water heater 31 → solenoid valve 30 → circulating water pump 9, and the other path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. Finally, the two paths merge back to circulating water pump 9, completing one cycle of the heat dissipation circulation loop. The cooling water heats the domestic hot water in the water heater 31, at which point solenoid valves 17 and 18 are closed. All the refrigerant evaporates and absorbs heat in the air-cooled evaporator 32, sending cool air into the room. The refrigerant in the outer tube of the condenser 3 condenses and releases heat, and the circulating water pump 9 starts. Cooling water passes through the inner tube of the condenser 3, using the heat of refrigerant condensation to preferentially heat the domestic hot water in the water heater 31. The remaining heat of refrigerant condensation is discharged into wastewater and waste gas through waste heat exchangers 13 and 14, and dissipates heat to the outdoor air through the outer tube of the condenser 3.

[0022] When the heat pump system is in heating cycle, the valve port of the three-way regulating valve 33 connected to the water heater 31 and the valve port connected to the air-cooled evaporator 32 are in the regulating state. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → three-way regulating valve 33 → air-cooled evaporator 32 (parallel to water heater 31) → expansion throttle 4 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. The heat absorption cycle completes one cycle, at which time solenoid valves 16, 19, and 30 are closed. The air-cooled evaporator 32 is converted into a condenser. A portion of the high-temperature refrigerant flows through the air-cooled evaporator 32 to deliver hot air to the room, while another portion of the high-temperature refrigerant flows through the water heater 31 to heat the domestic hot water in the water heater 31 using the heat of refrigerant condensation. The condenser 3 is converted into an evaporator. The refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. The circulating water pump 9 is started, and the cooling water absorbs the heat energy of wastewater and waste gas from the waste heat exchangers 13 and 14 and transfers it to the condenser 3.

[0023] When the outdoor condenser 3 frosts up in winter, the heat pump system can defrost without stopping the heating cycle. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → three-way regulating valve 33 → air-cooled evaporator 32 → expansion throttle 4 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is as follows: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17, then splits into two paths: one path: water heater 31 → solenoid valve 30 → circulating water pump 9, and the other path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. Finally, the two paths merge back into circulating water pump 9, completing one cycle of the defrosting heat absorption loop. At this time, solenoid valves 16 and 19 are closed. The cooling water absorbs heat energy from the domestic hot water in water heater 31 and absorbs heat from wastewater and waste gas through waste heat exchangers 13 and 14. It circulates through circulating water pump 9, transferring the heat energy to condenser 3. The refrigerant evaporates and absorbs the heat energy, reducing the heat absorbed from the air. Under the blowing of condenser fan 7, the frost will gradually melt. At the same time, the air-cooled evaporator 32 sends hot air into the room without affecting indoor heating. If the heat pump system stops operating, the heat energy from waste heat exchangers 13 and 14 and water heater 31 can be used to quickly defrost.

[0024] When hot water needs to be produced separately in any season, the heat pump system heats the water. The valve port of the three-way regulating valve 33 connected to the water heater 31 is fully open, and the valve port connected to the air-cooled evaporator 32 is closed. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → three-way regulating valve 33 → water heater 31 → expansion throttle 4 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is as follows: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. The heat absorption circulation loop completes one cycle. At this time, solenoid valves 16, 19, and 30 are closed. Water heater 31 uses all the condensation heat of the refrigerant to heat the domestic hot water. Condenser 3 is converted into an evaporator. The refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. Circulating water pump 9 is started. Cooling water absorbs the heat energy of wastewater and waste gas from waste heat exchangers 13 and 14 and transfers it to condenser 3.

[0025] Figure 4 China canceled Figure 3 The three-way regulating valve 33 is equipped with two expansion valves 34 and 35 connected in parallel in the heat pump system. One expansion valve 34 is connected in series with the water heater 31 and the air-cooled evaporator 32 in the heat pump system, and the other expansion valve 35 is connected in parallel with the expansion valve 34 and the water heater 31. The other expansion valve 35 is connected in series with the air-cooled evaporator 32 in the heat pump system and in parallel with the water heater 31.

[0026] When the heat pump system is in refrigeration cycle, expansion valve 35 is fully open and expansion valve 34 is closed. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → expansion valve 35 → air-cooled evaporator 32 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → solenoid valve 16 → condenser 3 → solenoid valve 19, then splits into two paths: one path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9; the other path: water heater 31 → solenoid valve 30 → circulating water pump 9. The heat dissipation circulation loop completes one cycle, and the cooling water heats the domestic hot water in water heater 31. At this time, solenoid valves 17 and 18 are closed. All the refrigerant evaporates and absorbs heat in the air-cooled evaporator 32, sending cool air into the room. The refrigerant in the outer tube of the condenser 3 condenses and releases heat, and the circulating water pump 9 starts. Cooling water passes through the inner tube of the condenser 3, using the heat of refrigerant condensation to preferentially heat the domestic hot water in the water heater 31. The remaining heat of refrigerant condensation is discharged into wastewater and waste gas through waste heat exchangers 13 and 14, and dissipates heat to the outdoor air through the outer tube of the condenser 3.

[0027] When the heat pump system is in heating cycle, the expansion valve 35 is closed and the expansion valve 34 is fully open. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → air-cooled evaporator 32 → water heater 31 → expansion valve 34 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is as follows: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. The heat absorption circulation loop completes one cycle. At this time, solenoid valves 16, 19, and 30 are closed, and the air-cooled evaporator 32 is converted into a condenser. The high-temperature refrigerant first dissipates some heat in the air-cooled evaporator 32 to send hot air to the room. The remaining heat is used to heat domestic hot water in the water heater 31. The condenser 3 is converted into an evaporator. The refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. The circulating water pump 9 is started, and the cooling water absorbs the heat energy of wastewater and waste gas from the waste heat exchangers 13 and 14 and transfers it to the condenser 3.

[0028] When the outdoor condenser 3 frosts in winter, the expansion valve 35 is fully open and the expansion valve 34 is closed. The heat pump system can defrost without stopping the heating cycle. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → air-cooled evaporator 32 → expansion valve 35 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is as follows: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17, then splits into two paths: one path: water heater 31 → solenoid valve 30 → circulating water pump 9, and the other path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. Finally, the two paths merge back into circulating water pump 9, completing one cycle of the defrosting heat absorption loop. At this time, solenoid valves 16 and 19 are closed. The cooling water absorbs heat energy from the domestic hot water in water heater 31 and absorbs heat from wastewater and waste gas through waste heat exchangers 13 and 14. It circulates through circulating water pump 9, transferring the heat energy to condenser 3. The refrigerant evaporates and absorbs the heat energy, reducing the heat absorbed from the air. Under the blowing of condenser fan 7, the frost will gradually melt. At the same time, the air-cooled evaporator 32 sends hot air into the room without affecting indoor heating. If the heat pump system stops operating, the heat energy from waste heat exchangers 13 and 14 and water heater 32 can be used to quickly defrost.

[0029] When hot water needs to be produced separately in any season, the heat pump system heats the cycle, with expansion valve 35 closed, expansion valve 34 fully open, solenoid valve 30 closed, and evaporator fan 8 shut down. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → air-cooled evaporator 32 → water heater 31 → expansion valve 34 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is as follows: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. The heat absorption circulation loop completes one cycle. At this time, solenoid valves 16, 19, and 30 are closed. Water heater 31 uses all the condensation heat of the refrigerant to heat the domestic hot water. Condenser 3 is converted into an evaporator. The refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. Circulating water pump 9 is started. Cooling water absorbs the heat energy of wastewater and waste gas from waste heat exchangers 13 and 14 and transfers it to condenser 3.

[0030] Figure 5An air conditioning system with a shell-and-tube heat exchanger includes a refrigeration system and a water heat exchange system. The refrigeration system is a single-cooling system with unidirectional refrigerant circulation. It includes a condenser 3, an air-cooled evaporator 32, a water-cooled evaporator 36, a compressor 1, and an expansion joint 4. The condenser 3 is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser 3 acts as the outdoor unit, exchanging heat with the outdoor air. The air-cooled evaporator 32 acts as the indoor unit, exchanging heat with the indoor air. The water-cooled evaporator 36 exchanges heat with the cooling water. The water heat exchange system includes the inner tube of the condenser 3, the water-cooled evaporator 36, and the expansion joint 4. The system includes a condenser 36, a water heater 15, waste heat exchangers 13 and 14, circulating water pumps 9 and 10, expansion tanks 11 and 12, and solenoid valves 22, 23, 25, 26, 27, 28, and 29. The circulating water pumps include a condenser circulating water pump 9 and an evaporator circulating water pump 10. The above equipment is connected to the inner pipe of the condenser 3 and the water-cooled evaporator 36 to form a water heat exchange system. The inlet and outlet water pipes of the inner pipe of the condenser 3, the water heater 15, the waste heat exchangers 13 and 14, the circulating water pump 9, the expansion tank 11, and the solenoid valves 22, 23, 25, 28, and 29 form a heat dissipation circulation loop to discharge condensation heat. The condenser 3 inner pipe inlet and outlet water pipes, water heater 15, circulating water pump 9, expansion tank 11, and solenoid valve 29 form a hot water circulation loop. At the same time, the water-cooled evaporator 36, waste heat exchangers 13 and 14, circulating water pump 10, expansion tank 12, and solenoid valves 22, 23, 26, and 27 form a heat absorption circulation loop. The hot water circulation loop and the heat absorption circulation loop are disconnected by solenoid valves 25 and 28, and the condensation heat is used to heat the domestic hot water of water heater 15. There is one or more waste heat exchangers 13 and 14 connected in parallel in the water heat exchange system. They are water-to-water heat exchangers and water-to-gas heat exchangers. Waste heat exchanger 13 is a water-to-gas heat exchanger, waste heat exchanger 14 is a water-to-water heat exchanger, and water heater 15 is a water-to-water heat exchanger. Waste heat exchangers 13 and 14 and water heater 15 are connected in parallel in the water heat exchange system and each has a solenoid valve. They are circulated by circulating water pumps 9 and 10. Wastewater and waste gas exchange heat with the water in the water heat exchange system. The refrigerant exchanges heat in condenser 3, air-cooled evaporator 32, and water-cooled evaporator 36. The heat energy of wastewater and waste gas and the condensation heat of refrigerant are transferred to condenser 3, air-cooled evaporator 32, water-cooled evaporator 36, and water heater 15.

[0031] Because the refrigeration system is a single-cooling system with a year-round refrigeration cycle, the refrigerant flow is: compressor 1 → condenser 3 → expansion valve 4 → water-cooled evaporator 36 → air-cooled evaporator 32 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → condenser 3, then splits into two paths: one path: solenoid valve 29 → water heater 15 → circulating water pump 9; the other path: solenoid valve 25 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → solenoid valve 28 → circulating water pump 9. Finally, the two paths merge back into circulating water pump 9, completing one cycle. At this point, solenoid valves 26 and 27 are closed. The refrigerant in the air-cooled evaporator 32 evaporates and absorbs heat, sending cool air into the room. The circulating water pump 10 stops, and there is no cooling water flowing in the water-cooled evaporator 36. The refrigerant does not evaporate and absorb heat in it. The refrigerant in the outer tube of the condenser 3 condenses and releases heat. The circulating water pump 9 starts, and the cooling water passes through the inner tube of the condenser 3. The heat of refrigerant condensation is used to preferentially heat the domestic hot water in the water heater 15. The remaining heat of refrigerant condensation is discharged into wastewater and waste gas through the waste heat exchangers 13 and 14, and dissipates heat to the outdoor air through the outer tube of the condenser 3.

[0032] When hot water needs to be produced separately in any season, the refrigerant circulation process remains unchanged. The cooling water circulation is two-way: one is from circulating water pump 9 to condenser 3, then to solenoid valve 29, water heater 15, and finally back to circulating water pump 9; the other is from circulating water pump 10 to solenoid valve 26, solenoid valve 22, waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) to solenoid valve 27, then to water-cooled evaporator 36, and finally back to circulating water pump 10. Solenoid valves 25 and 28 are closed. The refrigerant in water-cooled evaporator 36 first evaporates and absorbs heat, while the remaining refrigerant... The refrigerant absorbs heat again in the air-cooled evaporator 32 and sends cool air to the room. The cooling water absorbs the heat energy of the waste water and exhaust gas from the waste heat exchangers 13 and 14 and transfers it to the water-cooled evaporator 36. In this way, the air-cooled evaporator 32 absorbs heat from the indoor air, and the water-cooled evaporator 36 absorbs heat from the waste water and exhaust gas. Through the refrigeration cycle, the heat of refrigerant condensation is transferred to the condenser 3. The condenser fan 7 does not run, and the condenser 3 does not dissipate heat to the outdoor air. The refrigerant condensation heat is circulated by the circulating water pump 9, and all the heat of refrigerant condensation heats the domestic hot water of the water heater 15.

[0033] Figure 6An air conditioning system with a shell-and-tube heat exchanger includes a heat pump system and a water heat exchange system. The heat pump system comprises a condenser 3, a water-cooled evaporator 37, a compressor 1, an expansion valve 4, and a four-way reversing valve 2. The condenser 3 is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser 3 serves as the outdoor unit for heat exchange with the outdoor air. The water-cooled evaporator 37 is a combination of a water-to-water heat exchanger and a water-to-refrigerant heat exchanger, and can employ heat exchangers in the form of serpentine tubes, spiral tubes, shell-and-tubes, etc. Its water-to-water heat exchanger is connected to the water heat exchange system. The refrigerant heat exchanger is connected to the heat pump system to provide chilled and hot water for the air conditioning terminals, and is connected to the water heater 15 to provide a heat source. The water heat exchange system includes the inner tube of the condenser 3, the water-to-water heat exchanger of the water-cooled evaporator 37, the water heater 15, waste heat exchangers 13 and 14, circulating water pumps 9 and 10, expansion tanks 11 and 12, and solenoid valves 16, 17, 18, 19, 20, 21, 22, 23, and 24. The circulating water pumps include the condenser circulating water pump 9 and the evaporator circulating water pump 10. The above equipment is connected to the inner tube of the condenser 3 and the water-to-water heat exchanger of the water-cooled evaporator 37 to form a water heat exchange system. The system has two loops in the inlet and outlet water pipes of the condenser 3. Each loop has two solenoid valves 16, 19 and 17, 18, which are connected to the condenser circulating water pump 9, the water heater 15, and the waste heat exchangers 13, 14. By switching the solenoid valves 16, 19 and 17, 18, a heat dissipation loop or a heat absorption loop is formed. The water-to-water heat exchanger of the water-cooled evaporator 37 forms a hot water circulation loop with the evaporator circulating water pump 10, the water heater 15, and the solenoid valve 24, and is connected to the aforementioned heat absorption loop and heat dissipation loop through solenoid valves 20, 21. The waste heat exchangers 13, 14 have... One or more are connected in parallel in the water heat exchange system. They are water-to-water heat exchangers and water-to-gas heat exchangers. Waste heat exchanger 13 is a water-to-gas heat exchanger, waste heat exchanger 14 is a water-to-water heat exchanger, and water heater 15 is a water-to-water heat exchanger. Waste heat exchangers 13 and 14 and water heater 15 are connected in parallel in the water heat exchange system and each has a solenoid valve. They are circulated by circulating water pumps 9 and 10. Wastewater and waste gas exchange heat with the water in the water heat exchange system. The refrigerant exchanges heat in condenser 3 and water-cooled evaporator 37. The heat energy of wastewater and waste gas and the condensation heat of refrigerant are transferred to condenser 3, water-cooled evaporator 37 and water heater 15.

[0034] When the heat pump system is in refrigeration cycle, the refrigerant flow is: compressor 1 → four-way reversing valve 2 → condenser 3 → expansion valve 4 → water-cooled evaporator 37 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → solenoid valve 16 → condenser 3 → solenoid valve 19, then splits into two paths: one path: solenoid valve 20 → water heater 15 → solenoid valve 21 → circulating water pump 9; the other path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. Finally, the two paths merge back to circulating water pump 9, completing one cycle. At this time, solenoid valves 17, 18, and 24 are closed. The refrigerant in the water-cooled evaporator 37 evaporates and absorbs heat to provide chilled water for the air conditioning terminal. The circulating water pump 10 stops, and there is no cooling water flowing in the pipe. The refrigerant in the outer pipe of the condenser 3 condenses and releases heat. The circulating water pump 9 starts, and the heat dissipation circulation loop starts to operate. The cooling water passes through the inner pipe of the condenser 3 and uses the heat of refrigerant condensation to preferentially heat the domestic hot water of the water heater 15. The remaining heat of refrigerant condensation is discharged into wastewater and waste gas through the waste heat exchangers 13 and 14, and dissipates heat to the outdoor air through the outer pipe of the condenser 3.

[0035] When the heat pump system is in heating cycle, the refrigerant flow is: compressor 1 → four-way reversing valve 2 → water-cooled evaporator 37 → expansion throttle 4 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is a two-way circulation: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9, at which time solenoid valves 16 and 19 are closed; circulating water pump 10 → solenoid valve 24 → water heater 15 → water-cooled evaporator 37 → circulating water pump 10, at which time solenoid valves 20 and 21 are closed. The water-cooled evaporator 37 is converted into a condenser, and the refrigerant in the pipe condenses and releases heat to provide hot water for the air conditioning terminal. At the same time, the circulating water pump 10 starts and the hot water circulation loop starts to operate, using the heat of refrigerant condensation to heat the domestic hot water of the water heater 15. The condenser 3 is converted into an evaporator, and the refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. The circulating water pump 9 starts and the heat absorption circulation loop starts to operate. The cooling water absorbs the heat energy of wastewater and waste gas from the waste heat exchangers 13 and 14 and transfers it to the condenser 3.

[0036] When the outdoor condenser 3 frosts during winter, the heat pump system's heating cycle can defrost without stopping. The refrigerant flow is: compressor 1 → four-way reversing valve 2 → water-cooled evaporator 37 → expansion throttle 4 → condenser 3 → four-way reversing valve 2 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → solenoid valve 18 → condenser 3 → solenoid valve 17, then splits into two paths: one path: solenoid valve 20 → water heater 15 → solenoid valve 21 → circulating water pump 9; the other path: solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → circulating water pump 9. Finally, the two paths merge back to circulating water pump 9, completing one cycle. At this time, solenoid valves 16, 19, and 24 are closed. Condenser 3 transforms into evaporator. The refrigerant in the outer pipe evaporates and absorbs heat from the outdoor air and cooling water. Condenser circulating water pump 9 starts, initiating the heat absorption circulation loop and connecting to water heater 15 to form a defrosting circulation loop. Cooling water absorbs heat energy from domestic hot water in water heater 15 and absorbs heat from wastewater and exhaust gas through waste heat exchangers 13 and 14. This heat energy is then transferred to condenser 3 via condenser circulating water pump 9, where the refrigerant evaporates and absorbs heat, reducing the heat absorbed from the air. Under the blowing of condenser fan 7, the frost gradually melts. Simultaneously, evaporator circulating water pump 10 stops, and water-cooled evaporator 37 provides hot water to the air conditioning terminals without affecting indoor heating. If the heat pump system stops operating, the heat energy from waste heat exchangers 13 and 14 and water heater 15 can be used for rapid defrosting.

[0037] When hot water needs to be produced separately in any season, the heat pump system's heating cycle, and the refrigerant flow is: Compressor 1 → Four-way reversing valve 2 → Water-cooled evaporator 37 → Expansion throttle 4 → Condenser 3 → Four-way reversing valve 2 → Gas-liquid separator 6 → Compressor 1. The cooling water flow is a two-way circulation: Circulating water pump 9 → Solenoid valve 18 → Condenser 3 → Solenoid valve 17 → Solenoid valve 22 → Waste heat exchanger 14 (parallel solenoid valve 23 → Waste heat exchanger 13) → Circulating water pump 9, at which time solenoid valves 16 and 19 are closed; Circulating water pump 10 → Solenoid valve 24 → Water heater 15 → Water-cooled evaporator 37 → Circulating water pump 10, at which time solenoid valves 20 and 21 are closed. Condenser 3 transforms into evaporator, absorbing heat from outdoor air, wastewater, and exhaust gas. The heat absorption circulation loop starts operating. Waste heat exchangers 13 and 14 absorb heat from wastewater and exhaust gas, which is then circulated through condenser circulating water pump 9, transferring the heat energy to condenser 3. Water-cooled evaporator 37 transforms into condenser, and the refrigerant in the pipes condenses and releases heat, stopping the supply of hot water for air conditioning. Evaporator circulating water pump 10 starts, and the hot water circulation loop starts operating. At the same time, solenoid valves 20 and 21 connected to the heat absorption circulation loop are closed, and all the refrigerant condensation heats the domestic hot water in water heater 15.

[0038] Figure 7An air conditioning system with a shell-and-tube heat exchanger includes a refrigeration system and a water heat exchange system. The refrigeration system is a single-cooling system with unidirectional refrigerant circulation. It includes a condenser 3, a water-cooled evaporator 37, a compressor 1, and an expansion valve 4. The condenser 3 is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser 3 serves as the outdoor unit for heat exchange with the outdoor air. The water-cooled evaporator 37 is a combination of a water-to-water heat exchanger and a water-to-refrigerant heat exchanger. It can use heat exchangers in the form of serpentine tubes, spiral tubes, shell-and-tubes, etc. The water-to-water heat exchanger is connected to the water heat exchange system, and the water-to-refrigerant heat exchanger is connected to the refrigeration system, providing cooling to the air conditioning terminals. The water heat exchange system includes the inner tube of condenser 3, the water-to-water heat exchanger of water-cooled evaporator 37, water heater 15, waste heat exchangers 13 and 14, circulating water pumps 9 and 10, expansion tanks 11 and 12, and solenoid valves 22, 23, 25, 26, 27, 28, and 29. The circulating water pumps include condenser circulating water pump 9 and evaporator circulating water pump 10. The above equipment is connected to the inner tube of condenser 3 and the water-to-water heat exchanger of water-cooled evaporator 37 to form a water heat exchange system. The inlet and outlet water pipes of the inner tube of condenser 3, water heater 15, waste heat exchangers 13 and 14, circulating water pump 9, expansion tank 11, and solenoid valves 22, 23, 25, 28, and 29 form a heat dissipation circulation loop to discharge condensation heat. The inlet and outlet water pipes of the condenser 3, the water heater 15, the circulating water pump 9, the expansion tank 11, and the solenoid valve 29 form a hot water circulation loop. At the same time, the water-to-water heat exchanger of the water-cooled evaporator 37, the waste heat heat exchangers 13 and 14, the circulating water pump 10, the expansion tank 12, and the solenoid valves 22, 23, 26, and 27 form a heat absorption circulation loop. The hot water circulation loop and the heat absorption circulation loop are disconnected by solenoid valves 25 and 28, and the domestic hot water of the water heater 15 is heated by the condensation heat. There is one or more waste heat exchangers 13 and 14 connected in parallel in the water heat exchange system. They are water-to-water heat exchangers and water-to-gas heat exchangers. Waste heat exchanger 13 is a water-to-gas heat exchanger, waste heat exchanger 14 is a water-to-water heat exchanger, and water heater 15 is a water-to-water heat exchanger. Waste heat exchangers 13 and 14 and water heater 15 are connected in parallel in the water heat exchange system and each has a solenoid valve. They are circulated by circulating water pumps 9 and 10. Wastewater and waste gas exchange heat with the water in the water heat exchange system. The refrigerant exchanges heat in condenser 3 and water-cooled evaporator 37. The heat energy of wastewater and waste gas and the condensation heat of refrigerant are transferred to condenser 3, water-cooled evaporator 37 and water heater 15.

[0039] Because the refrigeration system is a single-cooling system with year-round refrigeration cycle, the refrigerant flow is: compressor 1 → condenser 3 → expansion valve 4 → water-cooled evaporator 37 → gas-liquid separator 6 → compressor 1. The cooling water flow is: circulating water pump 9 → condenser 3, then splits into two paths: one path: solenoid valve 29 → water heater 15 → circulating water pump 9; the other path: solenoid valve 25 → solenoid valve 22 → waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → solenoid valve 28 → circulating water pump 9. Finally, the two paths merge back into circulating water pump 9, completing one cycle. At this point, solenoid valves 26 and 27 are closed. The refrigerant in the water-cooled evaporator 37 evaporates and absorbs heat to provide chilled water for the air conditioning terminal. When the circulating water pump 10 stops, there is no cooling water flow. The refrigerant in the outer tube of the condenser 3 condenses and releases heat. The circulating water pump 9 starts, and the cooling water passes through the inner tube of the condenser 3. The heat of refrigerant condensation is used to preferentially heat the domestic hot water in the water heater 15. The remaining heat of refrigerant condensation is discharged into wastewater and waste gas through the waste heat exchangers 13 and 14, and dissipates heat to the outdoor air through the outer tube of the condenser 3.

[0040] When hot water needs to be produced separately in any season, the refrigerant circulation process remains unchanged. The cooling water circulation is two-way: one is from the circulating water pump 9 to the condenser 3, then to the solenoid valve 29, then to the water heater 15, and finally to the circulating water pump 9; the other is from the circulating water pump 10 to the solenoid valve 26, then to the solenoid valve 22, then to the waste heat exchanger 14 (parallel solenoid valve 23 → waste heat exchanger 13) → solenoid valve 27, then to the water-cooled evaporator 37, and finally to the circulating water pump 10. Solenoid valves 25 and 28 are closed. The refrigerant in the water-cooled evaporator 37 evaporates and absorbs heat, providing chilled water to the air conditioning terminal. It absorbs heat from the room air. The cooling water absorbs heat energy from the waste water and waste gas in the waste heat exchangers 13 and 14 and transfers it to the water-cooled evaporator 37. In this way, the water-cooled evaporator 37 absorbs heat from the indoor air and the cooling water. Through the refrigeration cycle, the heat of refrigerant condensation is transferred to the condenser 3, and then circulated through the circulating water pump 9. All the heat of refrigerant condensation heats the domestic hot water in the water heater 15. When the heat energy from wastewater and exhaust gas is sufficient to heat tap water, the water-cooled evaporator 37 does not provide chilled water to the air conditioning terminal; when there is no wastewater or exhaust gas or its heat is insufficient, chilled water is still required to be provided to the air conditioning terminal to obtain heat energy from the indoor air.

[0041] Figure 8 In the outdoor unit, the condenser 3 is L-shaped, and the sleeve is made into a single-pass straight pipe to facilitate fin installation. There are manifolds 38 at both ends. Alternatively, it can be made into a double-pass U-shaped sleeve by bending a straight pipe into a U-shaped pipe, which also facilitates fin installation. The manifold 38 is installed at one end of the sleeve. The condenser fan 7 is an axial flow fan with front air outlet. This outdoor unit is suitable for wall mounting. The circulating water pumps 9 and 10 and other equipment can be centrally placed indoors.

[0042] Figure 9In the outdoor unit, the condenser 3 is U-shaped, and the sleeve is made into a single-pass straight pipe or a double-pass U-shaped pipe. The sleeve is finned and bent into a U-shape. The condenser fan 7 is installed at the top of the outdoor unit, with air entering from the side and exiting from the top. The condenser fan 7 adopts an axial flow fan, a centrifugal fan, or an external rotor EC fan. This outdoor unit has a large power and is suitable for floor placement or placement on balconies or roofs. Circulating water pumps 9, 10, and other equipment can be centrally placed at the bottom of the outdoor unit to form an integrated unit, ensuring that the expansion tank is higher than the system.

[0043] Figure 10 In the outdoor unit, the condenser 3 is V-shaped, and the sleeve is made into a single-pass straight pipe or a double-pass U-shaped pipe. If it is made into a serpentine coil, it is advisable to use a bare tube or to insert discontinuous fins. After inserting the fins, it is then bent into a serpentine coil. The condenser fan 7 is installed at the top of the outdoor unit, with air entering from the side and exiting from the top. The condenser fan 7 uses an axial flow fan, a centrifugal fan, or an external rotor EC fan. This outdoor unit has a large power and is suitable for floor placement or placement on balconies or roofs. The circulating water pumps 9, 10, and other equipment can be placed in the lower part of the outdoor unit to form an integrated unit, ensuring that the expansion tank is higher than the system.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. An air conditioning system with a shell-and-tube heat exchanger, comprising a heat pump system and a water heat exchange system, characterized in that, The heat pump system includes a condenser, evaporator, compressor, expansion valve, and four-way reversing valve. The condenser and evaporator are shell-and-tube heat exchangers, with cooling water flowing through the inner tubes and refrigerant flowing through the outer tubes. The outer walls of the shell and tubes are either smooth or finned. The condenser acts as the outdoor unit, exchanging heat with the outdoor air, while the evaporator acts as the indoor unit, exchanging heat with the indoor air. The water heat exchange system includes the inner tubes of the condenser and evaporator, a water heater, a waste heat exchanger, a circulating water pump, an expansion tank, and valves. The circulating water pumps include a condenser circulating water pump and an evaporator circulating water pump. The water heater, waste heat exchanger, circulating water pump, expansion tank, and valves are connected to the inner tubes of the condenser and evaporator, forming the water heat exchange system. The inlet and outlet water pipes of the condenser inner tubes have two loops, each loop having... Two valves are connected to the condenser circulating water pump, water heater, and waste heat exchanger. By switching the valves, a heat dissipation circulation loop or a heat absorption circulation loop is formed. The inlet and outlet water pipes of the evaporator inner tube form a hot water circulation loop with the evaporator circulating water pump, water heater, and valves, and are connected to the above-mentioned heat absorption circulation loop and heat dissipation circulation loop through two valves. The waste heat exchanger exchanges heat with domestic wastewater and exhaust gas. There is one or more waste heat exchangers connected in parallel in the water heat exchange system. They are water-to-water heat exchangers and water-to-gas heat exchangers. The water heater is a water-to-water heat exchanger. The waste heat exchanger and the water heater are connected in parallel in the water heat exchange system, and each has a valve. By switching the valves, the flow direction of cooling water in the condenser inner tube and the evaporator inner tube is opposite to the flow direction of refrigerant.

2. An air conditioning system with a shell-and-tube heat exchanger, comprising a refrigeration system and a water heat exchange system, characterized in that... The refrigeration system is a single-cooling system with unidirectional refrigerant circulation. It includes a condenser, evaporator, compressor, and expansion valve. The condenser and evaporator are shell-and-tube heat exchangers; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser acts as the outdoor unit, exchanging heat with the outdoor air, while the evaporator acts as the indoor unit, exchanging heat with the indoor air. The water heat exchange system includes the inner tubes of the condenser and evaporator, a water heater, a waste heat exchanger, a circulating water pump, an expansion tank, and valves. The circulating water pumps include condenser and evaporator circulating water pumps. The water heater, waste heat exchanger, circulating water pump, expansion tank, and valves are connected to the inner tubes of the condenser and evaporator, forming the water heat exchange system. The condenser inner tube inlet and outlet water pipes, water heater, and waste heat exchanger... The heat exchanger, circulating water pump, expansion tank, and valves form a heat dissipation circulation loop; the condenser inner tube inlet and outlet water pipes, water heater, circulating water pump, expansion tank, and valves form a hot water circulation loop, while the evaporator inner tube inlet and outlet water pipes, waste heat exchanger, circulating water pump, expansion tank, and valves form a heat absorption circulation loop. The hot water circulation loop and the heat absorption circulation loop are disconnected by two valves; there is one or more waste heat exchangers connected in parallel in the water heat exchange system, which are water-to-water heat exchangers and water-to-air heat exchangers. The water heater is a water-to-water heat exchanger. The waste heat exchanger and the water heater are connected in parallel in the water heat exchange system and each has a valve. By switching the valves, the flow direction of the cooling water in the condenser inner tube and the evaporator inner tube is opposite to the flow direction of the refrigerant.

3. An air conditioning system with a shell-and-tube heat exchanger, including a heat pump system and a water heat exchange system, characterized in that... The heat pump system includes a condenser, water heater, air-cooled evaporator, compressor, expansion valve, four-way reversing valve, and three-way regulating valve. The condenser is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser acts as the outdoor unit, exchanging heat with the outdoor air, while the air-cooled evaporator acts as the indoor unit, exchanging heat with the indoor air. The water heat exchange system includes the condenser inner tube, water heater, waste heat exchanger, circulating water pump, expansion tank, and valves. The water heater, waste heat exchanger, circulating water pump, expansion tank, and valves are connected to the condenser inner tube, forming the water heat exchange system. The condenser inner tube inlet and outlet water pipes have two loops, each with two valves. The condenser inner tube inlet and outlet water pipes and the condenser circulation... The water pump, water heater, waste heat exchanger, and valves form a heat dissipation circulation loop; the condenser inner tube inlet and outlet water pipes, condenser circulating water pump, waste heat exchanger, and valves form a heat absorption circulation loop; there is one or more waste heat exchangers connected in parallel in the water heat exchange system, which are water-to-water heat exchangers and water-to-air heat exchangers; the water heater is a combination of a water-to-water heat exchanger and a water-to-refrigerant heat exchanger, with its water-to-water heat exchanger connected to the water heat exchange system and its water-to-refrigerant heat exchanger connected to the heat pump system, and connected in parallel with the air-cooled evaporator in the heat pump system through a three-way regulating valve; the waste heat exchanger and the water heater are connected in parallel in the water heat exchange system, and each has a valve, which switches the flow direction of cooling water in the condenser inner tube to the opposite direction of refrigerant flow.

4. An air conditioning system with a shell-and-tube heat exchanger, comprising a heat pump system and a water heat exchange system, characterized in that... The heat pump system includes a condenser, water heater, air-cooled evaporator, compressor, expansion valve, and four-way reversing valve. The condenser is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser acts as the outdoor unit, exchanging heat with the outdoor air, while the air-cooled evaporator acts as the indoor unit, exchanging heat with the indoor air. Two expansion valves are connected in parallel in the heat pump system. One expansion valve is connected in series with the water heater and air-cooled evaporator, and the other expansion valve is connected in parallel with the first expansion valve and the water heater. The third expansion valve is connected in series with the air-cooled evaporator and in parallel with the water heater. The water heat exchange system includes the condenser inner tube, water heater, waste heat exchanger, circulating water pump, expansion tank, and valves. The water heater, waste heat exchanger, circulating water pump, expansion tank, and valves are connected to the condenser inner tube. The pipes are connected to form a water heat exchange system. The inlet and outlet water pipes of the condenser have two loops, each with two valves. The inlet and outlet water pipes of the condenser, the condenser circulating water pump, the water heater, the waste heat exchanger, and the valves form a heat dissipation loop. The inlet and outlet water pipes of the condenser, the condenser circulating water pump, the waste heat exchanger, and the valves form a heat absorption loop. There is one or more waste heat exchangers connected in parallel in the water heat exchange system. These are water-to-water heat exchangers and water-to-air heat exchangers. The water heater is a combination of a water-to-water heat exchanger and a water-to-refrigerant heat exchanger. The water-to-water heat exchanger is connected to the water heat exchange system, and the water-to-refrigerant heat exchanger is connected to the heat pump system. The waste heat exchanger and the water heater are connected in parallel in the water heat exchange system and each has a valve. By switching the valves, the flow direction of the cooling water in the condenser's inner pipe is opposite to the flow direction of the refrigerant.

5. An air conditioning system with a shell-and-tube heat exchanger, comprising a refrigeration system and a water heat exchange system, characterized in that... The refrigeration system is a single-cooling system with unidirectional refrigerant circulation. It includes a condenser, an air-cooled evaporator, a water-cooled evaporator, a compressor, and an expansion valve. The condenser is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser acts as the outdoor unit, exchanging heat with the outdoor air; the air-cooled evaporator acts as the indoor unit, exchanging heat with the indoor air; and the water-cooled evaporator exchanges heat with the cooling water. The water heat exchange system includes the condenser inner tubes, the water-cooled evaporator, the water heater, the waste heat exchanger, a circulating water pump, an expansion tank, and valves. The circulating water pumps include a condenser circulating water pump and an evaporator circulating water pump. The water heater, waste heat exchanger, circulating water pump, expansion tank, valves, and the condenser inner tubes and water-cooled evaporator... The components are connected to form a water heat exchange system. The condenser inner tube inlet and outlet water pipes, water heater, waste heat exchanger, circulating water pump, expansion tank, and valves form a heat dissipation circulation loop, while the condenser inner tube inlet and outlet water pipes, water heater, circulating water pump, expansion tank, and valves form a hot water circulation loop. At the same time, the water-cooled evaporator, waste heat exchanger, circulating water pump, expansion tank, and valves form a heat absorption circulation loop. The hot water circulation loop and the heat absorption circulation loop are disconnected by two valves. There is one or more waste heat exchangers connected in parallel in the water heat exchange system. These are water-to-water heat exchangers and water-to-air heat exchangers. The water heater is a water-to-water heat exchanger. The waste heat exchanger and the water heater are connected in parallel in the water heat exchange system, and each has a solenoid valve.

6. An air conditioning system with a shell-and-tube heat exchanger, comprising a heat pump system and a water heat exchange system, characterized in that... The heat pump system includes a condenser, a water-cooled evaporator, a compressor, an expansion valve, and a four-way reversing valve. The condenser is a shell-and-tube heat exchanger, with cooling water flowing through the inner tube and refrigerant flowing through the outer tube. The outer wall of the shell-and-tube system is either smooth or finned. The condenser acts as the outdoor unit, exchanging heat with the outdoor air. The water-cooled evaporator is a combination of a water-to-water heat exchanger and a water-to-refrigerant heat exchanger. The water-to-water heat exchanger is connected to the water heat exchange system, and the water-to-refrigerant heat exchanger is connected to the heat pump system. The water heat exchange system includes the condenser inner tube, the water-to-water heat exchanger of the water-cooled evaporator, a water heater, a waste heat exchanger, a circulating water pump, an expansion tank, and valves. The circulating water pumps include a condenser circulating water pump and an evaporator circulating water pump. The water heater, waste heat exchanger, circulating water pump, expansion tank, and valves are connected to the condenser inner tube and the water-to-water heat exchanger of the water-cooled evaporator. The system consists of a condenser and a water-cooled evaporator. The condenser's inner tube inlet and outlet water pipes have two loops, each with two valves, and are connected to the condenser circulating water pump, water heater, and waste heat exchanger. By switching the valves, a heat dissipation loop or a heat absorption loop is formed. The water-to-water heat exchanger of the water-cooled evaporator forms a hot water loop with the evaporator circulating water pump, water heater, and valves, and is connected to the aforementioned heat absorption loop and heat dissipation loop through two valves. There is one or more waste heat exchangers connected in parallel in the water-cooled evaporator system. These are either water-to-water or water-to-air heat exchangers. The water heater is a water-to-water heat exchanger. The waste heat exchangers and water heaters are connected in parallel in the water-cooled evaporator system, and each has its own valve. By switching the valves, the flow direction of the cooling water in the condenser inner tube and the water-cooled evaporator is opposite to the flow direction of the refrigerant.

7. An air conditioning system with a shell-and-tube heat exchanger, comprising a refrigeration system and a water heat exchange system, characterized in that... The refrigeration system is a single-cooling system with unidirectional refrigerant circulation. It includes a condenser, a water-cooled evaporator, a compressor, and an expansion valve. The condenser is a shell-and-tube heat exchanger; the inner tube carries cooling water, and the outer tube carries refrigerant. The outer wall of the shell-and-tube system is either smooth or finned. The condenser serves as the outdoor unit for heat exchange with the outdoor air. The water-cooled evaporator is a combination of a water-to-water heat exchanger and a water-to-refrigerant heat exchanger. The water-to-water heat exchanger is connected to the water heat exchange system, and the water-to-refrigerant heat exchanger is connected to the refrigeration system. The water heat exchange system includes the condenser inner tube, the water-to-water heat exchanger of the water-cooled evaporator, a water heater, a waste heat exchanger, a circulating water pump, an expansion tank, and valves. The circulating water pumps include a condenser circulating water pump and an evaporator circulating water pump. The water heater, waste heat exchanger, circulating water pump, expansion tank, and valves are connected to the condenser. The inner tubes of the condenser and the water-to-water heat exchanger of the water-cooled evaporator are connected to form a water heat exchange system. The inlet and outlet water pipes of the condenser inner tube, the water heater, the waste heat exchanger, the circulating water pump, the expansion tank, and the valves form a heat dissipation circulation loop. The inlet and outlet water pipes of the condenser inner tube, the water heater, the circulating water pump, the expansion tank, and the valves form a hot water circulation loop. At the same time, the water-to-water heat exchanger, the waste heat exchanger, the circulating water pump, the expansion tank, and the valves of the water-cooled evaporator form a heat absorption circulation loop. The hot water circulation loop and the heat absorption circulation loop are disconnected by two valves. There is one or more waste heat exchangers connected in parallel in the water heat exchange system. These are water-to-water heat exchangers and water-to-air heat exchangers. The water heater is a water-to-water heat exchanger. The waste heat exchangers and the water heater are connected in parallel in the water heat exchange system and each has its own valve.

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