Direct steam / direct condensation multifunctional air conditioning system

Abstract

The present invention discloses a multifunctional direct-evaporation / direct-condensation air conditioning system, comprising an air conditioning subsystem, a phase-change heat transfer subsystem, a waste heat recovery subsystem, and an air-energy heat exchanger. The system features fresh air ventilation, exhaust heat recovery, air heating, air cooling heat recovery, fresh air heating, fresh air cooling heat recovery, and air-source heat pump hot water, meeting the practical needs of specialized locations such as kitchens, swimming pools, production workshops, and breeding sheds.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, in particular to a direct evaporation / direct condensation multifunctional air conditioning system. Background Art

[0002] Indoor air in special places such as kitchens, swimming pools, production workshops, and breeding sheds is subject to high temperatures, high humidity, smoke, dust, and corrosiveness. Therefore, indoor air conditioning is necessary for these special places. However, existing air conditioning systems for these places have limited functions and cannot meet actual needs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a direct steam / direct condensation multifunctional air conditioning system, which has working conditions such as fresh air ventilation, exhaust heat recovery, air heating, air cooling heat recovery, fresh air heating, fresh air cooling heat recovery, and air source heat pump hot water, which can meet the actual needs of special places such as kitchens, swimming pools, production workshops, and breeding houses.

[0004] The direct evaporation / direct condensation multifunctional air conditioning system of the present invention comprises an air conditioning subsystem, a phase change heat transfer subsystem, a waste heat recovery subsystem and an air energy heat exchanger.

[0005] The air conditioning subsystem includes an air conditioning unit, an air inlet duct and an air outlet duct, the air conditioning unit includes a sealed box, the sealed box is provided with an air inlet and an air outlet, the sealed box is equipped with a first heat exchanger and an air conditioning fan, the air conditioning fan is arranged close to the air outlet, the air inlet is connected to the middle of the air outlet duct, one end of the air outlet duct is provided with a first damper, the other end of the air outlet duct is provided with a second damper and a ventilation fan, the air outlet is connected to the middle of the air inlet duct, one end of the air inlet duct is provided with a third damper, and the other end of the air inlet duct is provided with a fourth damper.

[0006] The phase-change heat subsystem includes a compressor, a four-way valve, a first expansion valve, and a second expansion valve. The waste heat recovery subsystem includes a condenser and a domestic hot water circulation pipeline. The inlet of the compressor is connected to the first valve port of the four-way valve through a first pipeline, and the outlet of the compressor is connected to the second valve port of the four-way valve through a second pipeline. The third valve port of the four-way valve is connected to the high-temperature side inlet of the condenser through a third pipeline. The high-temperature side outlet of the condenser is connected to the first interface of the first heat exchanger through a fourth pipeline. The first expansion valve and the second expansion valve are arranged in series on the fourth pipeline. A first check valve arranged in parallel with the first expansion valve and a second check valve arranged in parallel with the second expansion valve are also connected to the fourth pipeline. The flow direction of the first check valve is from the first heat exchanger to the condenser, and the flow direction of the second check valve is from the condenser to the first heat exchanger. The second interface of the first heat exchanger is connected to the fourth valve port of the four-way valve through a fifth pipeline. The low-temperature side inlet and low-temperature side outlet of the condenser are connected to the domestic hot water circulation pipeline.

[0007] The third pipeline is connected to a first reversing valve, the fourth pipeline is connected to a second reversing valve, the first reversing valve is connected to a first interface of the air energy heat exchanger through a sixth pipeline, and the second reversing valve is connected to a second interface of the air energy heat exchanger through a seventh pipeline.

[0008] The direct evaporation / direct condensation multifunctional air conditioning system of the present invention, wherein the waste heat recovery subsystem also includes a second heat exchanger, a circulating water pipeline is connected between the high-temperature side of the second heat exchanger and the low-temperature side of the condenser, the low-temperature side inlet and the low-temperature side outlet of the condenser are connected to the circulating water pipeline, the high-temperature side inlet and the high-temperature side outlet of the second heat exchanger are connected to the circulating water pipeline, a circulating pump is connected to the circulating water pipeline, and the domestic hot water circulation pipeline is connected to the low-temperature side of the second heat exchanger.

[0009] The direct steam / direct condensation multifunctional air conditioning system of the present invention, wherein the waste heat recovery subsystem also includes a hot water storage tank, a hot water storage circulation pipeline is connected between the hot water storage tank and the low-temperature side of the second heat exchanger, the low-temperature side inlet and the low-temperature side outlet of the second heat exchanger are connected to the hot water storage circulation pipeline, a heat storage pump is connected to the hot water storage circulation pipeline, the hot water storage tank is connected to the domestic hot water circulation pipeline, the hot water storage tank is also connected to a tap water supply pipe, and the tap water supply pipe is connected to a water processor.

[0010] The direct evaporation / direct condensation multifunctional air conditioning system of the present invention, wherein a liquid distributor / collector and an air distributor / collector pipe are provided in the closed box, a liquid pipe port and an air pipe port are provided on the closed box, the liquid pipe port is connected to the fourth pipeline, the air pipe port is connected to the fifth pipeline, the liquid pipe port is connected to the first interface of the first heat exchanger through the liquid distributor / collector, and the air pipe port is connected to the second interface of the first heat exchanger through the air distributor / collector pipe.

[0011] The direct steam / direct condensation multifunctional air conditioning system of the present invention also includes a cleaning and water supply and drainage subsystem, which includes a drainage pool, a chemical barrel, a cleaning barrel and a softening water tank. A water collector is provided in the closed box, and the water collector is located below the first heat exchanger. A drain outlet is provided on the closed box, and the drain outlet is connected to the water collector. The drain outlet is connected to the drainage pool through a drainage pipe. A cleaner for cleaning the first heat exchanger is provided in the closed box, and a cleaning port connected to the cleaner is provided on the closed box. The cleaning port is connected to the cleaner through an internal cleaning pipe, and an external cleaning pipe is connected to the cleaning port. The chemical barrel is connected to the external cleaning pipe through a chemical pipe, and the cleaning barrel is connected to the external cleaning pipe through a branch cleaning pipe. A chemical pump is connected to the chemical pipe, and a cleaning pump is connected to the branch cleaning pipe. The softened water tank is connected to the circulating water pipe through a softened water pipe, and a water supply pump is connected to the softened water pipe.

[0012] The present invention provides a direct steam / direct condensation multifunctional air conditioning system, wherein the cleaner includes a cylinder, the two ends of the cylinder are respectively an inlet end and an outlet end, the inlet end of the cylinder is connected to the internal cleaning pipeline, a fluid channel is provided in the cylinder wall of the cylinder, the fluid channel passes through the outlet end of the cylinder, a first through hole connected to the fluid channel is provided on the inner cylinder wall of the cylinder, a baffle is fixedly provided in the cylinder cavity of the cylinder, the baffle is arranged near the outlet end of the cylinder, a slide is provided in the cylinder cavity of the cylinder for sliding sealing, the slide is arranged near the inlet end of the cylinder, an elastic member is connected between the slide and the baffle, when the elastic member is in an extended state, the slide is located on the side of the first through hole near the inlet end of the cylinder, and when the elastic member is in a compressed state, the slide is located on the side of the first through hole near the outlet end of the cylinder.

[0013] The direct steam / direct condensation multifunctional air conditioning system of the present invention, wherein an inner guide cylinder is fixedly provided on the side of the baffle close to the slide, an outer guide cylinder is fixedly provided on the side of the slide close to the baffle, the inner guide cylinder is slidably connected in the cylinder cavity of the outer guide cylinder, and the elastic member is located in the cylinder cavities of the inner guide cylinder and the outer guide cylinder.

[0014] The direct steam / direct condensation multifunctional air conditioning system of the present invention, wherein the cylinder includes an inner cylinder and an outer cylinder, the inner cylinder is located in the cylinder cavity of the outer cylinder, the inner cylinder and the outer cylinder are sealed by an annular plate, the annular plate is located at the inlet end of the cylinder, the annular gap between the inner cylinder and the outer cylinder forms the fluid channel, the cylinder cavity of the inner cylinder is the cylinder cavity of the cylinder, and the first through hole is provided on the cylinder wall of the inner cylinder.

[0015] In the direct steam / direct condensation multifunctional air conditioning system of the present invention, an annular sealing ring is provided between the slide plate and the cylinder cavity of the inner cylinder, and the annular sealing ring is fixed on the slide plate.

[0016] The direct steam / direct condensation multifunctional air conditioning system of the present invention, wherein the elastic member is a spring, one end of the spring is fixedly connected to the slide plate, and the other end of the spring is fixedly connected to the baffle, and the baffle is provided with a second through hole.

[0017] The difference between the direct steam / direct condensation multifunctional air conditioning system of the present invention and the prior art is that when the direct steam / direct condensation multifunctional air conditioning system of the present invention is in use, the end of the outlet air duct with the first air door and the end of the inlet air duct with the third air door are extended to the indoor space of special places such as kitchens, swimming pools, production workshops, and breeding houses, and the end of the outlet air duct with the second air door / ventilation fan and the end of the inlet air duct with the fourth air door are extended to the outdoors of the above-mentioned special places. Then, by adjusting the opening and closing of the first air door, the second air door, the third air door, the fourth air door, the air conditioning fan, the ventilation fan, the phase change heat recovery subsystem, the waste heat recovery subsystem and the air energy heat exchanger, fresh air ventilation, exhaust heat recovery, air heating, air cooling heat recovery, fresh air heating, fresh air cooling heat recovery, air source heat pump hot water and other working conditions are realized, thereby meeting the actual needs of special places such as kitchens, swimming pools, production workshops, and breeding houses.

[0018] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the direct evaporation / direct condensation multifunctional air conditioning system of the present invention in a cooling and dehumidification state;

[0020] Figure 2 This is a structural schematic diagram of the direct steam / direct condensation multifunctional air conditioning system of the present invention in a heating state;

[0021] Figure 3 This is an air flow diagram of the air conditioning subsystem of the present invention when it is in the fresh air ventilation working condition;

[0022] Figure 4FIG1 is an air flow diagram of the air conditioning subsystem of the present invention when it is in the exhaust heat recovery working condition;

[0023] Figure 5 This is an air flow diagram of the air conditioning subsystem of the present invention when it is in the air heating / air cooling heat recovery working mode;

[0024] Figure 6 This is an air flow diagram of the air conditioning subsystem of the present invention when it is in the fresh air heating / fresh air cooling heat recovery working mode;

[0025] Figure 7 This is an air flow diagram of the air conditioning subsystem of the present invention when the air source heat pump is in hot water operation mode;

[0026] Figure 8 This is a front view of the air conditioning unit of the present invention;

[0027] Figure 9 For the Figure 8 Cross-sectional view along line AA;

[0028] Figure 10 This is a front sectional view of the air conditioning unit of the present invention;

[0029] Figure 11 It is a left side view of the air conditioning unit of the present invention;

[0030] Figure 12 It is a right side view of the air conditioning unit of the present invention;

[0031] Figure 13 It is a front view of the cleaning device of the present invention;

[0032] Figure 14 A top view of the cleaning device of the present invention;

[0033] Figure 15 This is a front cross-sectional view of the washer in the closed state of the present invention;

[0034] Figure 16 This is a front sectional view of the washer in the open state in the present invention. DETAILED DESCRIPTION

[0035] like Figure 1 As shown, combined with Figure 2-16 As shown, the direct evaporation / direct condensation multifunctional air conditioning system of the present invention includes an air conditioning subsystem 1, a phase change heat transfer subsystem 2, a waste heat recovery subsystem 4, and an air energy heat exchanger 3. It should be noted that the air energy heat exchanger 3 is prior art, and its specific structure and operating principle are not described in detail here.

[0036] The air conditioning subsystem 1 includes an air conditioning unit 10, an air inlet duct 7 and an air outlet duct 12. The air conditioning unit 10 includes a sealed box 62. The sealed box 62 is provided with an air inlet 61 and an air outlet 63. A first heat exchanger 67 and an air conditioning fan 9 are installed in the sealed box 62. The air conditioning fan 9 is arranged near the air outlet 63. The air inlet 61 is connected to the middle of the air outlet duct 12. One end of the air outlet duct 12 is provided with a first damper 11. The other end of the air outlet duct 12 is provided with a second damper 13 and a ventilation fan 14. The air outlet 63 is connected to the middle of the air inlet duct 7. One end of the air inlet duct 7 is provided with a third damper 6. The other end of the air inlet duct 7 is provided with a fourth damper 8.

[0037] The phase change heat subsystem 2 includes a compressor 29, a four-way valve 23, a first expansion valve 36, and a second expansion valve 37. The waste heat recovery subsystem 4 includes a condenser 39 and a domestic hot water circulation pipeline. The inlet of the compressor 29 is connected to the first valve port 24 of the four-way valve 23 through a first pipeline 25, and the outlet of the compressor 29 is connected to the second valve port 26 of the four-way valve 23 through a second pipeline 31. The third valve port 27 of the four-way valve 23 is connected to the high-temperature side inlet of the condenser 39 through a third pipeline 28. The high-temperature side outlet of the condenser 39 is connected to the first interface of the first heat exchanger 67 through a fourth pipeline 20. The first expansion valve 36 and the second expansion valve 37 (the first expansion valve 36 and the second expansion valve 37) are arranged in series on the fourth pipeline 20. The expansion valve 36 is arranged near the first heat exchanger 67, and the second expansion valve 37 is arranged near the condenser 39. The fourth pipeline 20 is also connected to a first check valve 34 arranged in parallel with the first expansion valve 36 and a second check valve 35 arranged in parallel with the second expansion valve 37. The flow direction of the first check valve 34 is from the first heat exchanger 67 to the condenser 39, and the flow direction of the second check valve 35 is from the condenser 39 to the first heat exchanger 67. The second interface of the first heat exchanger 67 is connected to the fourth valve port 22 of the four-way valve 23 via the fifth pipeline 21. The low-temperature side inlet and low-temperature side outlet of the condenser 39 are connected to the domestic hot water circulation pipeline (i.e., the domestic hot water flows through the low-temperature side of the condenser 39). It should be noted that the four-way valve 23 is a prior art, and its specific structure and working principle will not be described in detail here.

[0038] The third pipeline 28 is connected to a first reversing valve 33, and the fourth pipeline 20 is connected to a second reversing valve 38. The first reversing valve 33 is connected to the first interface of the air energy heat exchanger 3 through the sixth pipeline 30, and the second reversing valve 38 is connected to the second interface of the air energy heat exchanger 3 through the seventh pipeline 32.

[0039] When in use, the first damper 11-equipped end of the outlet duct 12 and the third damper 6-equipped end of the inlet duct 7 are both extended indoors to special locations such as kitchens, swimming pools, production workshops, and breeding sheds. The second damper 13 / exhaust fan 14-equipped end of the outlet duct 12 and the fourth damper 8-equipped end of the inlet duct 7 are both extended outdoors to the aforementioned special locations. Air is then allowed to flow through or through the first heat exchanger 67 by adjusting the opening and closing of the first damper 11, second damper 13, third damper 6, fourth damper 8, air conditioning fan 9, and exhaust fan 14. The first heat exchanger 67 is a finned heat exchanger. When air flows through the first heat exchanger 67, the operating mode of the phase change heat subsystem 2 is adjusted to allow the refrigerant flowing through the first heat exchanger 67 to heat or cool the air for dehumidification.

[0040] The various working conditions of the present invention are described in detail below:

[0041] (1) Fresh air ventilation

[0042] like Figure 3 As shown, the first damper 11, the second damper 13, the third damper 6, the fourth damper 8 and the ventilation fan 14 are opened, and the air conditioning fan 9, the phase change heat conversion subsystem 2, the waste heat recovery subsystem 4 and the air energy heat exchanger 3 are closed. Under the action of the ventilation fan 14, the indoor air is discharged to the outside through the air outlet duct 12, and the outdoor air enters the room through the air inlet duct 7 to complete the fresh air ventilation.

[0043] (2) Exhaust heat recovery

[0044] like Figure 4 As shown, combined with Figure 1As shown, the first damper 11, the fourth damper 8, the air conditioning fan 9, the phase change heat subsystem 2 and the waste heat recovery subsystem 4 are opened, and the second damper 13, the third damper 6, the ventilation fan 14 and the air energy heat exchanger 3 are closed. Under the action of the air conditioning fan 9, the indoor air enters the air conditioning unit 10 through the air outlet duct 12, flows through the first heat exchanger 67 in the air conditioning unit 10, and is discharged to the outside through the air inlet duct 7. At this time, the four-way valve 23, the first reversing valve 33 and the second reversing valve 38 are adjusted to connect the first valve port 24 of the four-way valve 23 with the fourth valve port 22, and the second valve port 26 with the third valve port 27. The first reversing valve 33 cuts off the connection between the third pipeline 28 and the sixth pipeline 30, and allows the third pipeline 28 to connect with the four-way valve 23 and the condenser 39. The second reversing valve 38 cuts off the connection between the fourth pipeline 20 and the seventh pipeline 32, and allows the fourth pipeline 20 to connect with the first heat exchanger 67 and the condenser 39. Thus, the refrigerant coming out of the compressor 29 passes through the second pipeline 3 in sequence. 1. The refrigerant enters the condenser 39 through the second valve port 26 and the third valve port 27 of the four-way valve 23, the third pipeline 28, and the high-temperature side inlet of the condenser 39, then flows out from the high-temperature side outlet of the condenser 39, and then flows into the first heat exchanger 67 through the fourth pipeline 20 (at this time, the refrigerant flows into the first interface of the first heat exchanger 67), and then flows out through the second interface of the first heat exchanger 67, and then flows into the compressor 29 through the fifth pipeline 21, the fourth valve port 22 and the first valve port 24 of the four-way valve 23, and the first pipeline 25 in sequence, forming a refrigeration loop.

[0045] When the refrigerant flows through the fourth pipeline 20, since the second expansion valve 37 is arranged close to the condenser 39 and the first expansion valve 36 is arranged close to the first heat exchanger 67, the refrigerant flowing out of the condenser 39 first flows through the second one-way valve 35 (since the flow direction of the second one-way valve 35 is from the condenser 39 to the first heat exchanger 67, the refrigerant flows through the second one-way valve 35 but not through the second expansion valve 37), and then flows through the first expansion valve 36 (since the flow direction of the first one-way valve 34 is from the first heat exchanger 67 to the condenser 39, the refrigerant flows through the first expansion valve 36 but not through the first one-way valve 34), and finally flows into the first heat exchanger 67.

[0046] In summary, compressor 29, condenser 39, first expansion valve 36, and first heat exchanger 67 are connected by piping to form a refrigeration loop. First heat exchanger 67 functions as an evaporator. The operating principle of the refrigeration loop is known from the prior art and will not be further elaborated here. As the refrigerant flows through first heat exchanger 67, it exchanges heat with the air flowing through it, absorbing heat from the air. As the refrigerant flows through the high-temperature side of condenser 39, it exchanges heat with the domestic hot water flowing through the low-temperature side of condenser 39, transferring its own heat to the domestic hot water. Consequently, heat from the air is transferred to the domestic hot water via the refrigerant, achieving heat recovery.

[0047] (3) Air heating

[0048] like Figure 5 As shown, combined with Figure 2 As shown, the first damper 11, the third damper 6, the air conditioning fan 9, the phase change heat subsystem 2 and the air energy heat exchanger 3 are opened, and the second damper 13, the fourth damper 8, the ventilation fan 14 and the waste heat recovery subsystem 4 are closed. Under the action of the air conditioning fan 9, the indoor air enters the air conditioning unit 10 through the air outlet duct 12, flows through the first heat exchanger 67 in the air conditioning unit 10, and then returns to the room through the air inlet duct 7. At this time, the four-way valve 23, the first reversing valve 33 and the second reversing valve 38 are adjusted so that the first valve port 24 of the four-way valve 23 is connected to the third valve port 27, and the second valve port 26 is connected to the fourth valve port 22. The first reversing valve 33 is connected to the third pipeline 28 and the sixth pipeline 30, and the connection between the four-way valve 23 and the condenser 39 through the third pipeline 28 is cut off. The second reversing valve 38 is connected to the fourth pipeline 20 and the seventh pipeline 32, and the connection between the first heat exchanger 67 and the condenser 39 through the fourth pipeline 20 is cut off. Then, the refrigerant coming out of the compressor 29 passes through the second pipeline 31, the second valve port 26 of the four-way valve 23 and the fourth valve port 2 2. The fifth pipeline 21 flows into the first heat exchanger 67 (at this time, the refrigerant flows in from the second interface of the first heat exchanger 67), then flows out through the first interface of the first heat exchanger 67, and then flows into the air energy heat exchanger 3 through the fourth pipeline 20, the second reversing valve 38, and the seventh pipeline 32 in sequence (at this time, the refrigerant flows in from the second interface of the air energy heat exchanger 3), and then flows out from the first interface of the air energy heat exchanger 3, and then flows into the compressor 29 through the sixth pipeline 30, the first reversing valve 33, the third pipeline 28, the third valve port 27 and the first valve port 24 of the four-way valve 23, and the first pipeline 25 in sequence, forming a refrigeration loop.

[0049] When the refrigerant flows through the fourth pipeline 20, since the first expansion valve 36 is arranged close to the first heat exchanger 67 and the second expansion valve 37 is arranged close to the condenser 39, the refrigerant flowing out of the first heat exchanger 67 first flows through the first one-way valve 34 (since the flow direction of the first one-way valve 34 is from the first heat exchanger 67 to the condenser 39, the refrigerant flows through the first one-way valve 34 but not through the first expansion valve 36), then flows through the second expansion valve 37 (since the flow direction of the second one-way valve 35 is from the condenser 39 to the first heat exchanger 67, the refrigerant flows through the second expansion valve 37 but not through the second one-way valve 35), and finally flows into the air energy heat exchanger 3 through the second reversing valve 38 and the seventh pipeline 32.

[0050] In summary, the compressor 29, the first heat exchanger 67, the second expansion valve 37 and the air-to-energy heat exchanger 3 are connected through pipelines to form a refrigeration loop, wherein the first heat exchanger 67 functions as the condenser 39, and the air-to-energy heat exchanger 3 functions as the evaporator. As for the working principle of the refrigeration loop, it belongs to the existing technology and will not be described in detail here. When the refrigerant flows through the first heat exchanger 67, the refrigerant exchanges heat with the air flowing through the first heat exchanger 67 (the air is recorded as the first air), that is, the refrigerant transfers its own heat to the first air to heat it; when the refrigerant flows through the air-to-energy heat exchanger 3, the refrigerant exchanges heat with the air flowing through the air-to-energy heat exchanger 3 (the air is recorded as the second air), that is, the refrigerant absorbs the heat in the second air. It can be seen that the refrigerant first absorbs the heat in the second air, and then the refrigerant transfers the heat to the first air. Therefore, under the action of the above-mentioned refrigeration loop, the present invention can heat the air flowing through the first heat exchanger 67.

[0051] (4) Air cooling heat recovery

[0052] like Figure 5 As shown, combined with Figure 1 As shown, the first damper 11, third damper 6, air conditioning fan 9, phase-change heat transfer subsystem 2, and waste heat recovery subsystem 4 are opened, and the second damper 13, fourth damper 8, ventilation fan 14, and air-energy heat exchanger 3 are closed. Under the action of the air conditioning fan 9, indoor air enters the air conditioning unit 10 through the outlet duct 12, flows through the first heat exchanger 67 within the air conditioning unit 10, and then returns to the room through the inlet duct 7. Regarding the operating conditions of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in this operating condition, refer to the "Exhaust Heat Recovery" operating condition described above. The operating conditions of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in both operating conditions are the same.

[0053] (5) Fresh air heating

[0054] like Figure 6As shown, combined with Figure 2 As shown, the second damper 13, third damper 6, air conditioning fan 9, phase-change heat transfer subsystem 2, and air-energy heat exchanger 3 are opened, and the first damper 11, fourth damper 8, ventilation fan 14, and waste heat recovery subsystem 4 are closed. Under the action of air conditioning fan 9, outdoor air enters the air conditioning unit 10 through the outlet duct 12, flows through the first heat exchanger 67 within the air conditioning unit 10, and then enters the room through the inlet duct 7. Regarding the operating status of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in this operating condition, refer to the "Air Heating" operating condition above. The operating status of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in both operating conditions is the same.

[0055] (6) Fresh air cooling heat recovery

[0056] like Figure 6 As shown, combined with Figure 1 As shown, the second damper 13, third damper 6, air conditioning fan 9, phase-change heat transfer subsystem 2, and waste heat recovery subsystem 4 are opened, and the first damper 11, fourth damper 8, ventilation fan 14, and air-energy heat exchanger 3 are closed. Under the action of air conditioning fan 9, outdoor air enters the air conditioning unit 10 through the outlet duct 12, flows through the first heat exchanger 67 within the air conditioning unit 10, and then enters the room through the inlet duct 7. Regarding the operating conditions of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in this operating condition, refer to the "Exhaust Heat Recovery" operating condition described above. The operating conditions of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in both operating conditions are the same.

[0057] (7) Air source heat pump hot water

[0058] like Figure 7 As shown, combined with Figure 1As shown, the second damper 13, fourth damper 8, air conditioning fan 9, phase-change heat transfer subsystem 2, and waste heat recovery subsystem 4 are opened, and the first damper 11, third damper 6, ventilation fan 14, and air-energy heat exchanger 3 are closed. Under the action of the air conditioning fan 9, outdoor air enters the air conditioning unit 10 through the outlet duct 12, flows through the first heat exchanger 67 within the air conditioning unit 10, and is then discharged to the outside through the inlet duct 7. Regarding the operating conditions of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in this operating condition, refer to the "Exhaust Heat Recovery" operating condition described above. The operating conditions of the phase-change heat transfer subsystem 2, waste heat recovery subsystem 4, and air-energy heat exchanger 3 in both operating conditions are the same. In this operating mode, as the refrigerant flows through the first heat exchanger 67, it exchanges heat with the outdoor air flowing through it, absorbing heat from the outdoor air. As the refrigerant flows through the condenser 39, it transfers its own heat to the domestic hot water. The compressor 29, condenser 39, first expansion valve 36, and first heat exchanger 67 (which functions as an evaporator) are connected via piping to form an air-source heat pump, which produces domestic hot water.

[0059] like Figure 1 、 2 As shown, the direct steam / direct condensation multifunctional air conditioning system of the present invention, wherein the waste heat recovery subsystem 4 also includes a second heat exchanger 42, a circulating water pipeline 40 is connected between the high temperature side of the second heat exchanger 42 and the low temperature side of the condenser 39, the low temperature side inlet and the low temperature side outlet of the condenser 39 are connected to the circulating water pipeline 40, the high temperature side inlet and the high temperature side outlet of the second heat exchanger 42 are connected to the circulating water pipeline 40, a circulating pump 41 is connected to the circulating water pipeline 40, and the domestic hot water circulation pipeline is connected to the low temperature side of the second heat exchanger 42.

[0060] The present invention's direct steam / condensation multifunctional air conditioning system includes the waste heat recovery subsystem 4 further comprising a hot water tank 45. A hot water circulation pipeline 43 is connected between the hot water tank 45 and the low-temperature side of the second heat exchanger 42. The low-temperature side inlet and outlet of the second heat exchanger 42 are connected to the hot water circulation pipeline 43. A heat storage pump 44 is connected to the hot water circulation pipeline 43. The hot water tank 45 is connected to a domestic hot water circulation pipeline, namely, the domestic hot water circulation pipeline includes a domestic hot water supply pipe 46 and a domestic hot water return pipe 47, both of which are connected to the hot water tank 45. The hot water tank 45 is also connected to a tap water supply pipe 49, which is connected to a water treatment unit 48. The water treatment unit 48 is conventional technology, and tap water treated by the water treatment unit 48 can provide replenishment water for the hot water tank 45.

[0061] In this embodiment, the domestic hot water circulation pipeline is not directly connected to the low-temperature side of the condenser 39, but is connected to the low-temperature side of the condenser 39 in sequence through the hot water tank 45, the hot water circulation pipeline 43, the second heat exchanger 42 and the circulating water pipeline 40. The heat exchange principle is as follows: under the action of the circulation pump 41, the circulating water in the circulating water pipeline 40 circulates between the low-temperature side of the condenser 39 and the high-temperature side of the second heat exchanger 42; under the action of the heat storage pump 44, the hot water in the hot water circulation pipeline 43 circulates between the low-temperature side of the second heat exchanger 42 and the hot water tank 45. When the circulating water flows through the low-temperature side of the condenser 39, the circulating water exchanges heat with the refrigerant flowing through the high-temperature side of the condenser 39, that is, the circulating water absorbs the heat of the refrigerant, and the circulating water after absorbing heat continues to flow through the high-temperature side of the second heat exchanger 42 and exchanges heat with the stored water flowing through the low-temperature side of the second heat exchanger 42, that is, the circulating water transfers its own heat to the stored water, and then the circulating water flows through the low-temperature side of the condenser 39 again, so that the circulating water completes a circulation flow, and the stored water after absorbing heat (that is, the stored water flowing through the low-temperature side of the second heat exchanger 42) continues to flow to the hot water storage tank 45, in the hot water storage tank 45, the stored water transfers heat to the domestic hot water circulation pipeline connected to the hot water storage tank 45, completing heat recovery, and the stored water after releasing heat flows through the low-temperature side of the second heat exchanger 42 again, so that the stored water completes a circulation flow. In summary, the heat exchange principle can be briefly described as follows: the refrigerant transfers heat to the circulating water through the condenser 39, and then the circulating water transfers heat to the stored water through the second heat exchanger 42, and finally the stored water transfers heat to the domestic hot water in the hot water storage tank 45.

[0062] like Figure 8 As shown, combined with Figure 9-12 As shown in 1-2, the direct evaporation / direct condensation multifunctional air conditioning system of the present invention, wherein the sealed box 62 is provided with a liquid distributor / collector 69 and a gas distributor / collector pipe 68, and the sealed box 62 is provided with a liquid pipe port 19 and a gas pipe port 18, the liquid pipe port 19 is connected to the fourth pipeline 20, and the gas pipe port 18 is connected to the fifth pipeline 21, the liquid pipe port 19 is connected to the first interface of the first heat exchanger 67 through the liquid distributor / collector 69, and the gas pipe port 18 is connected to the second interface of the first heat exchanger 67 through the gas distributor / collector pipe 68.

[0063] When the refrigerant heats the air flowing through the first heat exchanger 67, the function of the first heat exchanger 67 is equivalent to that of the condenser 39. The gaseous refrigerant flowing out of the fifth pipeline 21 flows into the distribution / collection pipe 68 through the air pipe port 18, and then the gaseous refrigerant flowing out of the distribution / collection pipe 68 flows into the first heat exchanger 67 through the second interface of the first heat exchanger 67. In the first heat exchanger 67, the gaseous refrigerant transfers its own heat to the air flowing through the first heat exchanger 67, so that the air is heated and the gaseous refrigerant releases heat to become liquid refrigerant. Then, the liquid refrigerant flows out from the first interface of the first heat exchanger 67 and enters the distribution / collection pipe 69. Then, the liquid refrigerant in the distribution / collection pipe 69 flows into the fourth pipeline 20 through the liquid pipe port 19.

[0064] When the refrigerant cools the air flowing through the first heat exchanger 67, the first heat exchanger 67 acts as an evaporator, and the liquid refrigerant flowing out of the fourth pipeline 20 flows into the distributor / collector 69 through the liquid pipe port 19, and then the liquid refrigerant flowing out of the distributor / collector 69 flows into the first heat exchanger 67 through the first interface of the first heat exchanger 67. In the first heat exchanger 67, the liquid refrigerant absorbs the heat of the air flowing through the first heat exchanger 67, so that the air is cooled, and the liquid refrigerant absorbs heat and becomes gaseous refrigerant. Then, the gaseous refrigerant flows out from the second interface of the first heat exchanger 67 and enters the distributor / collector pipe 68. Then, the gaseous refrigerant in the distributor / collector pipe 68 flows into the fifth pipeline 21 through the gas pipe port 18.

[0065] As the refrigerant circulates within the refrigeration loop, it switches back and forth between liquid and gas states. This is prior art and will not be further elaborated upon here. As can be seen from the above discussion, the fourth pipeline 20 is not directly connected to the first interface of the first heat exchanger 67. Instead, the fourth pipeline 20 is first connected to the liquid distributor / collector 69 through the liquid pipe port 19, and then the liquid distributor / collector 69 is connected to the first interface of the first heat exchanger 67. The fifth pipeline 21 is also not directly connected to the second interface of the first heat exchanger 67. Instead, the fifth pipeline 21 is first connected to the gas distributor / collector 68 through the gas pipe port 18, and then the gas distributor / collector 68 is connected to the second interface of the first heat exchanger 67.

[0066] like Figure 1 、 2As shown, the direct steam / direct condensation multifunctional air conditioning system of the present invention also includes a cleaning and draining subsystem 5, which includes a drainage tank 60, a reagent barrel 59, a cleaning barrel 58 and a softening water tank 57. A water collector 70 is provided in the closed box 62, and the water collector 70 is located below the first heat exchanger 67. A drain port 16 is provided on the closed box 62, and the drain port 16 is connected to the water collector 70. The drain port 16 is connected to the drainage tank 60 through a drainage pipe 15. A cleaner 66 for cleaning the first heat exchanger 67 is provided in the closed box 62. A cleaning port 17 connected to the cleaning device 66 is provided on 62. The cleaning port 17 is connected to the cleaning device 66 through an internal cleaning pipe 65. The cleaning port 17 is connected to an external cleaning pipe 50. The chemical barrel 59 is connected to the external cleaning pipe 50 through a chemical pipe 52. The cleaning barrel 58 is connected to the external cleaning pipe 50 through a branch cleaning pipe 54. The chemical pipe 52 is connected to a chemical pump 51. The branch cleaning pipe 54 is connected to a cleaning pump 53. The softened water tank 57 is connected to the circulating water pipe 40 through a softened water pipe 56. The softened water pipe 56 is connected to a water supply pump 55.

[0067] In this embodiment, pressure sensors are respectively provided on both sides of the air inlet and outlet of the air conditioning unit 10, so that the air pressure on both sides of the air conditioning unit 10 can be automatically detected. When the pressure difference is greater than or equal to the design value, it means that a lot of dirt is attached to the fins of the first heat exchanger 67 and it needs to be cleaned. At this time, the cleaning function in the cleaning and drainage subsystem 5 is activated. According to different air properties and the properties of dirt on the fins of the air conditioning unit 10, cleaning agents are configured and placed in the agent barrel 59. Then, the agent pump 51 is started, and the agent passes through the agent pipeline 52, the external The cleaning line 50, cleaning port 17, and internal cleaning line 65 enter the cleaning chamber 66, and then are sprayed out from the cleaning chamber 66 to clean the dirt attached to the fins. The cleaning time is determined after actual measurement. After the chemical cleaning is completed, the cleaning pump 53 is started. The cleaning bucket 58 is filled with clean water. The clean water then enters the cleaning chamber 66 through the sub-cleaning line 54, the external cleaning line 50, the cleaning port 17, and the internal cleaning line 65. It is then sprayed out from the cleaning chamber 66 to clean the chemical remaining on the fins, thereby keeping the fins clean and preventing residual chemical from contaminating the air. The purpose of cleaning the first heat exchanger 67 is to ensure its high heat exchange efficiency.

[0068] The water collector 70 belongs to the existing technology and has two functions: first, when the air flows through the first heat exchanger 67 and is cooled, condensed water will be precipitated. The condensed water can be collected by the water collector 70 and then flow to the drainage pool 60 through the drain port 16 and the drain pipe 15; second, when the first heat exchanger 67 is cleaned, the cleaning agent and clean water (i.e., cleaning wastewater) are collected by the water collector 70 and then flow to the drainage pool 60 through the drain port 16 and the drain pipe 15.

[0069] The purpose of setting the softened water tank 57 is to provide make-up water to the circulating water pipeline 40. When it is necessary to provide make-up water to the circulating water pipeline 40, the make-up water pump 55 is started, and softened water starts from the softened water tank 57 and enters the circulating water pipeline 40 through the softened water pipeline 56.

[0070] like Figure 13-16 As shown, the direct steam / direct condensation multifunctional air conditioning system of the present invention, wherein the washer 66 includes a cylinder, the two ends of the cylinder are respectively an inlet end 71 and an outlet end 73, the inlet end 71 of the cylinder is connected to the internal cleaning pipeline 65, a fluid channel 79 is provided in the cylinder wall of the cylinder, the fluid channel 79 passes through the outlet end 73 of the cylinder, and a first through hole 77 communicating with the fluid channel 79 is provided on the inner cylinder wall of the cylinder, a baffle 81 is fixedly provided in the cylinder cavity of the cylinder, the baffle 81 is arranged near the outlet end 73 of the cylinder, a slide plate 76 is provided in the cylinder cavity of the cylinder for sliding sealing, the slide plate 76 is arranged near the inlet end 71 of the cylinder, an elastic member is connected between the slide plate 76 and the baffle 81, when the elastic member is in an extended state, the slide plate 76 is located on the side of the first through hole 77 near the inlet end 71 of the cylinder, and when the elastic member is in a compressed state, the slide plate 76 is located on the side of the first through hole 77 near the outlet end 73 of the cylinder.

[0071] In the direct evaporation / direct condensation multifunctional air conditioning system of the present invention, an inner guide cylinder 82 is fixedly provided on the side of the baffle 81 close to the slide plate 76, and an outer guide cylinder 84 is fixedly provided on the side of the slide plate 76 close to the baffle 81. The inner guide cylinder 82 is slidably connected in the cylinder cavity of the outer guide cylinder 84, and the elastic member is located in the cylinder cavities of the inner guide cylinder 82 and the outer guide cylinder 84.

[0072] The direct evaporation / direct condensation multifunctional air conditioning system of the present invention, wherein the cylinder includes an inner cylinder 78 and an outer cylinder 72, the inner cylinder 78 is located in the cylinder cavity of the outer cylinder 72, the inner cylinder 78 and the outer cylinder 72 are sealed by an annular plate 74, the annular plate 74 is located at the inlet end 71 of the cylinder, the annular gap between the inner cylinder 78 and the outer cylinder 72 forms the fluid channel 79, the cylinder cavity of the inner cylinder 78 is the cylinder cavity of the cylinder, and the first through hole 77 is provided on the cylinder wall of the inner cylinder 78.

[0073] In the direct evaporation / direct condensation multifunctional air conditioning system of the present invention, an annular sealing ring 75 is provided between the slide plate 76 and the cylinder cavity of the inner cylinder 78 , and the annular sealing ring 75 is fixed on the slide plate 76 .

[0074] In the direct steam / direct condensation multifunctional air conditioning system of the present invention, the elastic member is a spring 83, one end of the spring 83 is fixedly connected to the slide plate 76, and the other end of the spring 83 is fixedly connected to the baffle 81, and the baffle 81 is provided with a second through hole 80.

[0075] In the initial state, that is, when the cleaner 66 does not clean the first heat exchanger 67, the spring 83 is in an extended state. At this time, the slide 76 is located on the side of the first through hole 77 close to the inlet end 71 of the cylinder, and the cleaner 66 is in a closed state. When the agent / clean water enters the inlet end 71 of the cylinder from the inner cleaning pipe 65, under the action of water pressure, the agent / clean water will push the slide plate 76 to slide toward the outlet end 73 of the cylinder. During this process, the outer guide cylinder 84 moves with the slide plate 76, that is, the outer guide cylinder 84 moves toward the baffle 81, so that the inner guide cylinder 82 gradually enters the cylinder cavity of the outer guide cylinder 84, and at the same time the spring 83 is compressed until the slide plate 76 slides to the side of the first through hole 77 close to the outlet end 73 of the cylinder. At this time, the washer 66 is in the open state, so the agent / clean water enters the fluid channel 79 (that is, the annular gap between the inner cylinder 78 and the outer cylinder 72) from the first through hole 77, and then the agent / clean water is sprayed out from the outlet end 73 of the cylinder to clean the first heat exchanger 67. After cleaning is completed, the chemical pump 51 / cleaning pump 53 is turned off, the water pressure disappears, and the compressed spring 83 returns to its original state and becomes extended again. During this process, the slide plate 76 slides toward the inlet end 71 of the cylinder body until it slides to the side of the first through hole 77 close to the inlet end 71 of the cylinder body. At the same time, the outer guide cylinder 84 moves along with the slide plate 76, and the inner guide cylinder 82 gradually slides out of the outer guide cylinder 84. Of course, whether the spring 83 is in the extended state or the compressed state, the inner guide cylinder 82 and the outer guide cylinder 84 will not completely separate. The inner guide cylinder 82 and the outer guide cylinder 84 can play a guiding role to prevent the spring 83 from abnormal deformation.

[0076] When cleaning is completed, the slide plate 76 slides back to the side of the first through hole 77 near the inlet end 71 of the cylinder. At this time, the washer 66 is in a closed state. The outside air can only enter the cylinder cavity of the inner cylinder 78 between the slide plate 76 and the baffle 81 through the fluid channel 79. Due to the obstruction of the slide plate 76, the outside air cannot enter the inner cleaning pipeline 65 through the inlet end 71 of the cylinder. This can prevent foreign matter (such as dust) in the outside air from entering the entire cleaning pipeline, thereby preventing the entire cleaning pipeline from being blocked. In this way, the worst case is that the foreign matter in the outside air will only block the washer 66. The staff only needs to dredge the washer 66, which can greatly reduce the workload of dredging the cleaning pipeline.

[0077] In this embodiment, the baffle 81 is provided with a second through hole 80. Thus, even if the medicine / clean water seeps into the barrel cavity between the slide plate 76 and the baffle 81, the medicine / clean water will flow out from the outlet end 73 of the barrel through the second through hole 80. In other words, after the washer 66 completes its cleaning work, no medicine / clean water will be stored inside it.

[0078] When the direct steam / direct condensation multifunctional air conditioning system of the present invention is in use, the end of the outlet air duct 12 where the first air damper 11 is set and the end of the air inlet air duct 7 where the third air damper 6 is set are extended to the indoor space of special places such as kitchens, swimming pools, production workshops, and breeding houses, and the end of the outlet air duct 12 where the second air damper 13 / ventilation fan 14 is set and the end of the air inlet air duct 7 where the fourth air damper 8 is set are extended to the outdoors of the above-mentioned special places. Then, by adjusting the opening and closing of the first air damper 11, the second air damper 13, the third air damper 6, the fourth air damper 8, the air conditioning fan 9, the ventilation fan 14, the phase change heat recovery subsystem 2, the waste heat recovery subsystem 4 and the air energy heat exchanger 3, fresh air ventilation, exhaust heat recovery, air heating, air cooling heat recovery, fresh air heating, fresh air cooling heat recovery, air source heat pump hot water and other working conditions are realized, thereby meeting the actual needs of special places such as kitchens, swimming pools, production workshops, and breeding houses.

[0079] The present invention is an indoor multifunctional air conditioning system developed based on the special indoor air treatment requirements of special places such as kitchens, swimming pools, production workshops, and breeding houses, which have high heat, high humidity, oil smoke, dust, corrosiveness, etc. The system has the functions of fresh air ventilation, air conditioning, waste heat recovery, air dehumidification, and hot water production; it has a dust-proof and oil-proof design and a fully automatic self-cleaning function; it is energy-saving and environmentally friendly, and has high efficiency; it does not occupy indoor space, occupies a small area, has low noise, and can operate all year round.

[0080] When the air needs to be cooled and dehumidified, the refrigerant in the phase change heat subsystem 2 evaporates directly in the air conditioning unit 10 to absorb heat, thereby cooling and dehumidifying the air flowing through the unit, and sending the heat to the phase change heat subsystem 2, where the compressor 29 works to release heat in the condenser 39 in the waste heat recovery subsystem 4, and the heat is used to produce hot water to achieve heat recovery; when heat recovery is not required, the system is switched to the air energy heat exchanger 3 through the first reversing valve 33 and the second reversing valve 38, whereupon the refrigerant in the phase change heat subsystem 2 condenses and releases heat in the air energy heat exchanger 3 (at this time, the function of the air energy heat exchanger 3 is equivalent to that of the condenser 39), releasing heat into the atmosphere, thereby achieving stable operation of the system.

[0081] When the air needs to be heated, the phase change heat subsystem 2 is switched to the heating function through the four-way valve 23. The refrigerant condenses and releases heat directly in the air conditioning unit 10, heats the air flowing through the unit, and sends the cold energy to the phase change heat subsystem 2. The air then enters the air energy heat exchanger 3 to evaporate and cool, absorbing heat from the air. The compressor 29 then performs work to send the high-temperature and high-pressure refrigerant gas into the air conditioning unit 10 to condense and release heat.

[0082] The air conditioning subsystem 1 consists of a three-way outlet duct 12, an air conditioning unit 10, and a three-way inlet duct 7, forming an "I" shape. The "┃" represents the air conditioning unit 10, and the two "━"s represent the outlet duct 12 and the inlet duct 7, respectively. The outlet duct 12 bypasses the air conditioning unit 10's air inlet 61, directly connecting to the indoor end where a first damper 11 is installed, and directly connecting to the outdoor end where a second damper 13 and ventilation fan 14 are installed. The inlet duct 7 bypasses the air conditioning unit 10's air outlet 63, directly connecting to the indoor end where a third damper 6 is installed, and directly connecting to the outdoor end where a fourth damper 8 is installed. The multifunctional air conditioning system switches between various operating modes by opening and closing these four dampers, the ventilation fan 14, and the air conditioning fan 9.

[0083] Air conditioning unit 10 achieves cooling / dehumidification (heat recovery) or heating functions by changing the phase of the refrigerant delivered by phase-change heat transfer subsystem 2. To facilitate installation of air conditioning unit 10, a bracket 64 is fixed to the bottom of the unit's sealed housing 62. Bracket 64 is used to mount the unit to the desired location.

[0084] During cooling / dehumidification (heat recovery), the refrigerant liquid flows into the liquid distributor / collector 69, and the refrigerant is sent to the first heat exchanger 67 to evaporate and absorb heat, and exchange heat with the air to be conditioned to cool it down. The vaporized refrigerant flows into the gas distributor / collector pipe 68 and then flows back to the phase change heat subsystem 2.

[0085] During the heating function, the high-pressure and high-temperature refrigerant gas passes through the gas distribution / collection pipe 68 and enters the first heat exchanger 67, where it liquefies and releases heat to heat the air to be conditioned. The refrigerant liquid is collected by the liquid distribution / collection device 69 and then flows back to the phase change heat subsystem 2.

[0086] The present invention is applicable to special locations such as kitchens, swimming pools, production workshops, and breeding sheds. Indoor air in these locations is characterized by high heat, high humidity, oil smoke, dust, and corrosiveness. Consequently, dust, oil, and other contaminants easily adhere to the surface of the first heat exchanger 67, causing blockage. This increases wind resistance, reduces ventilation, and reduces both heat exchange and efficiency. Pressure sensors are installed on both the inlet and outlet sides of the first heat exchanger 67 within the air conditioning unit 10. Pressure differential changes are used to determine blockage status, collect contaminant composition, and prepare a cleaning agent. When the pressure differential reaches a designed value, the agent pump 51 is activated to deliver the agent to the washer 66, which evenly sprays the agent onto the first heat exchanger 67 to clean it. After cleaning, the cleaning pump 53 is activated to rinse any remaining agent with clean water, maintaining a clean, sanitary, and pollution-free first heat exchanger 67. The cleaning wastewater is collected by a water collector 70 and discharged into a drainage tank 60.

[0087] The technical points of the present invention are as follows:

[0088] (1) It has functions such as fresh air ventilation, air conditioning, waste heat recovery, air dehumidification, and hot water production;

[0089] (2) The air conditioning unit 10 is designed to be dust-proof and oil-proof and has a fully automatic self-cleaning function; it does not occupy indoor space, has a small footprint, is quiet, and can operate year-round;

[0090] (3) The air conditioning subsystem 1 is in the shape of an “I”. The “┃” represents the air conditioning unit 10, and the two “━” represent the air outlet duct 12 and the air inlet duct 7 respectively.

[0091] (4) The air conditioning subsystem 1 adopts a four-port design with four dampers to adjust the system to various working conditions. It is easy to switch and suitable for use in all seasons, keeping the indoor air fresh and comfortable;

[0092] (5) Energy saving and environmental protection, high efficiency, multi-function in one machine, easy to choose.

[0093] It should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "front", "back", "left", "right", and "middle" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0094] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0095] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A direct evaporation / direct condensation multifunctional air conditioning system, characterized by: Including air conditioning subsystem, phase change heat transfer subsystem, waste heat recovery subsystem and air energy heat exchanger, The air conditioning subsystem includes an air conditioning unit, an air inlet duct and an air outlet duct, the air conditioning unit includes a sealed box, the sealed box is provided with an air inlet and an air outlet, the sealed box is equipped with a first heat exchanger and an air conditioning fan, the air conditioning fan is arranged close to the air outlet, the air inlet is connected to the middle of the air outlet duct, one end of the air outlet duct is provided with a first damper, the other end of the air outlet duct is provided with a second damper and a ventilation fan, the air outlet is connected to the middle of the air inlet duct, one end of the air inlet duct is provided with a third damper, and the other end of the air inlet duct is provided with a fourth damper. The phase-change heat subsystem includes a compressor, a four-way valve, a first expansion valve, and a second expansion valve. The waste heat recovery subsystem includes a condenser and a domestic hot water circulation pipeline. The inlet of the compressor is connected to the first valve port of the four-way valve through a first pipeline, and the outlet of the compressor is connected to the second valve port of the four-way valve through a second pipeline. The third valve port of the four-way valve is connected to the high-temperature side inlet of the condenser through a third pipeline. The high-temperature side outlet of the condenser is connected to the first interface of the first heat exchanger through a fourth pipeline. The first expansion valve and the second expansion valve are arranged in series on the fourth pipeline. A first check valve arranged in parallel with the first expansion valve and a second check valve arranged in parallel with the second expansion valve are also connected to the fourth pipeline. The flow direction of the first check valve is from the first heat exchanger to the condenser, and the flow direction of the second check valve is from the condenser to the first heat exchanger. The second interface of the first heat exchanger is connected to the fourth valve port of the four-way valve through a fifth pipeline. The low-temperature side inlet and low-temperature side outlet of the condenser are connected to the domestic hot water circulation pipeline. The third pipeline is connected to a first reversing valve, the fourth pipeline is connected to a second reversing valve, the first reversing valve is connected to a first interface of the air energy heat exchanger through a sixth pipeline, and the second reversing valve is connected to a second interface of the air energy heat exchanger through a seventh pipeline.

2. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 1, characterized in that: The waste heat recovery subsystem also includes a second heat exchanger, a circulating water pipeline is connected between the high-temperature side of the second heat exchanger and the low-temperature side of the condenser, the low-temperature side inlet and the low-temperature side outlet of the condenser are connected to the circulating water pipeline, the high-temperature side inlet and the high-temperature side outlet of the second heat exchanger are connected to the circulating water pipeline, a circulating pump is connected to the circulating water pipeline, and the domestic hot water circulation pipeline is connected to the low-temperature side of the second heat exchanger.

3. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 2, characterized in that: The waste heat recovery subsystem also includes a hot water storage tank. A hot water storage circulation pipeline is connected between the hot water storage tank and the low-temperature side of the second heat exchanger. The low-temperature side inlet and the low-temperature side outlet of the second heat exchanger are connected to the hot water storage circulation pipeline. A heat storage pump is connected to the hot water storage circulation pipeline. The hot water storage tank is connected to the domestic hot water circulation pipeline. The hot water storage tank is also connected to a tap water supply pipe, and the tap water supply pipe is connected to a water processor.

4. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 3, characterized in that: A liquid distributor / collector and an air distributor / collector pipe are provided in the sealed box, and a liquid pipe port and an air pipe port are provided on the sealed box. The liquid pipe port is connected to the fourth pipeline, and the air pipe port is connected to the fifth pipeline. The liquid pipe port is connected to the first interface of the first heat exchanger through the liquid distributor / collector, and the air pipe port is connected to the second interface of the first heat exchanger through the air distributor / collector pipe.

5. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 4, characterized in that: It also includes a cleaning and water replenishment subsystem, which includes a drainage pool, a chemical barrel, a cleaning barrel and a softened water tank. A water collector is provided in the closed box, and the water collector is located below the first heat exchanger. A drain outlet is provided on the closed box, and the drain outlet is connected to the water collector. The drain outlet is connected to the drainage pool through a drainage pipeline. A cleaner for cleaning the first heat exchanger is provided in the closed box, and a cleaning port connected to the cleaner is provided on the closed box. The cleaning port is connected to the cleaner through an internal cleaning pipeline, and an external cleaning pipeline is connected to the cleaning port. The chemical barrel is connected to the external cleaning pipeline through a chemical pipeline, and the cleaning barrel is connected to the external cleaning pipeline through a branch cleaning pipeline. A chemical pump is connected to the chemical pipeline, and a cleaning pump is connected to the branch cleaning pipeline. The softened water tank is connected to the circulating water pipeline through a softened water pipeline, and a water replenishment pump is connected to the softened water pipeline.

6. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 5, characterized in that: The cleaner includes a cylinder, wherein the two ends of the cylinder are respectively an inlet end and an outlet end, the inlet end of the cylinder is connected to the internal cleaning pipeline, a fluid channel is provided in the cylinder wall of the cylinder, the fluid channel runs through the outlet end of the cylinder, and a first through hole connected to the fluid channel is provided on the inner cylinder wall of the cylinder, a baffle is fixedly provided in the cylinder cavity of the cylinder, the baffle is arranged near the outlet end of the cylinder, a slide is provided in the cylinder cavity of the cylinder for sliding sealing, the slide is arranged near the inlet end of the cylinder, an elastic member is connected between the slide and the baffle, when the elastic member is in an extended state, the slide is located on the side of the first through hole close to the inlet end of the cylinder, and when the elastic member is in a compressed state, the slide is located on the side of the first through hole close to the outlet end of the cylinder.

7. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 6, characterized in that: An inner guide cylinder is fixedly provided on one side of the baffle close to the slide plate, and an outer guide cylinder is fixedly provided on one side of the slide plate close to the baffle plate. The inner guide cylinder is slidably connected in the cylinder cavity of the outer guide cylinder, and the elastic member is located in the cylinder cavities of the inner guide cylinder and the outer guide cylinder.

8. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 7, characterized in that: The cylinder includes an inner cylinder and an outer cylinder. The inner cylinder is located in the cylinder cavity of the outer cylinder. The inner cylinder and the outer cylinder are sealed by an annular plate. The annular plate is located at the inlet end of the cylinder. The annular gap between the inner cylinder and the outer cylinder forms the fluid channel. The cylinder cavity of the inner cylinder is the cylinder cavity of the cylinder. The first through hole is provided on the cylinder wall of the inner cylinder.

9. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 8, characterized in that: An annular sealing ring is provided between the slide plate and the cylinder cavity of the inner cylinder, and the annular sealing ring is fixed on the slide plate.

10. The direct evaporation / direct condensation multifunctional air conditioning system according to claim 9, characterized in that: The elastic member is a spring, one end of the spring is fixedly connected to the slide plate, and the other end of the spring is fixedly connected to the baffle, and the baffle is provided with a second through hole.

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