Air conditioner capable of recycling and purifying condensate water and working method thereof

Abstract

The invention provides an air conditioner capable of recycling and purifying condensate water and a working method thereof.The air conditioner is provided with a purifying assembly, the purifying assembly comprises a membrane distillation device, a first water collecting box, a second water collecting box, a first circulating water pump and a second circulating water pump, and the first water collecting box communicates with a second water collecting tank; the water inlet end of the feeding side of the membrane distillation device is communicated with the first water collecting box through a first circulating water pump, the water outlet end of the feeding side of the membrane distillation device is communicated with the first water collecting box, and the water inlet end of the permeation side of the membrane distillation device is communicated with the second water collecting box through a second circulating water pump; by means of the air conditioner capable of recycling and purifying the condensate water, the condensate water recycling and filtering process can be simplified, meanwhile, energy consumption can be reduced, and energy saving is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner capable of recycling and purifying condensed water, and also to a working method using the air conditioner capable of recycling and purifying condensed water. Background Art

[0002] Air conditioning condensate typically drains along the exterior walls through drainpipes. Long-term air conditioning use can cause moss to grow on the walls, and moisture seeping into the interior can cause dampness. In severe cases, this can lead to cracking and debonding. Currently, various condensate recovery devices and condensate reuse models exist. Most incorporate water storage components to recover condensate, then purify it through multi-stage filtration or adsorption. The condensate is then used for humidification or cooling of air conditioning controller components. For example, activated carbon plates can be used to absorb impurities in the condensate, disinfecting and purifying it. Alternatively, the condenser drain pan outlet can be connected to a filter cartridge, which then purifies and recovers the condensate through the cartridge filter element. The multi-stage filtration system in most condensate recovery devices primarily consists of non-woven fabric sheets, filters, activated carbon plates, and adsorption bags. These involve numerous filter materials, resulting in complex and difficult-to-replace filter devices. Furthermore, similar to the adsorption bag filtration process, the adsorption bag easily becomes saturated, resulting in suboptimal condensate recovery and purification efficiency. Alternatively, some purification devices utilize reverse osmosis to purify condensate. However, the filtration and recovery of condensed water based on reverse osmosis under high pressure consumes a relatively high amount of energy.

[0003] Therefore, it is necessary to consider a more optimized air conditioner structure that can recycle and purify condensed water. Summary of the Invention

[0004] The first object of the present invention is to provide an air conditioner that can simplifies the condensed water recovery and filtration process, reduces energy consumption, and achieves energy saving and can recycle and purify condensed water.

[0005] A second object of the present invention is to provide an operating method for an air conditioner that can simplify the condensed water recovery and filtration process while reducing energy consumption and achieving energy saving.

[0006] In order to achieve the above-mentioned first purpose, the air conditioner provided by the present invention can recycle and purify condensed water, including an indoor unit, an outdoor unit and a spray assembly. The indoor unit is provided with a first water collection tank for recovering condensed water, and the outdoor unit is provided with a second water collection tank. The water inlet end of the spray assembly is connected with the water outlet end of the first water collection tank, the water outlet end of the spray assembly is installed above the outdoor heat exchanger of the outdoor unit, and the second water collection tank is installed below the outdoor heat exchanger; the air conditioner is also provided with a purification assembly, which includes a membrane distillation device, a first water collection box, a second water collection box, a first circulating water pump and a second circulating water pump. The first water collection box is connected with the second water collection tank, the feed side water inlet end of the membrane distillation device is connected with the first water collection box through the first circulating water pump, the feed side water outlet end of the membrane distillation device is connected with the first water collection box, the osmotic side water inlet end of the membrane distillation device is connected with the second water collection box through the second circulating water pump, and the osmotic side water outlet end of the membrane distillation device is connected with the second water collection box.

[0007] It can be seen from the above scheme that the air conditioner of the present invention that can recycle and purify condensed water, by setting up a membrane distillation device, purifies the recovered condensed water based on membrane distillation, which can solve the problem that the multi-stage filtration system in the current condensed water recovery device involves a large amount of filtration materials, the filtration device is complex, and it is not easy to replace. It simplifies the filtration process, and uses membrane distillation for purification, which can reduce energy consumption and achieve energy saving. At the same time, it also solves the problem that the adsorption is easily saturated in similar adsorption bag filtration processes, resulting in low efficiency in the recovery and purification of condensed water.

[0008] In a further solution, a heating device for heating the liquid in the first water collecting box is provided in the first water collecting box.

[0009] It can be seen that by setting a heating device in the first water collecting box, it can be used to heat the liquid in the first water collecting box when the air conditioner is in heating state, so that the feed side and the osmotic side of the membrane distillation device maintain an appropriate temperature difference, thereby realizing membrane distillation purification operation.

[0010] In a further solution, the heating device includes a heating copper tube through which the refrigerant circulates, and the heating copper tube is connected in parallel to the high-temperature side of the refrigerant circuit when the air conditioner is heating.

[0011] It can be seen that by connecting the heating copper tube in parallel to the high-temperature side of the refrigerant circuit when the air conditioner is heating, the refrigerant can be used to heat the liquid in the first water collection box without adding additional heating devices, thereby reducing costs.

[0012] In a further solution, the second water collecting box is provided with a cooling device for cooling the liquid in the second water collecting box.

[0013] It can be seen that by providing a cooling device in the second water collecting box to cool the liquid in the second water collecting box, the feed side and the permeate side of the membrane distillation device are kept at an appropriate temperature difference, thereby achieving membrane distillation purification operation.

[0014] In a further solution, the cooling device includes a condensing copper tube through which refrigerant circulates, and the condensing copper tube is connected in parallel to the low-temperature side of the refrigerant circuit when the air conditioner is in cooling mode.

[0015] It can be seen that by connecting the condensing copper tube in parallel to the low-temperature side of the refrigerant circuit during cooling of the air conditioner, the refrigerant can be used to cool the liquid in the first water collecting box without adding additional cooling devices, thereby reducing costs.

[0016] In a further solution, the indoor unit is further provided with a humidifier, and the liquid inlet end of the humidifier is connected to the second water collecting box.

[0017] It can be seen that by setting up a humidifier and using the purified cooling water in the second water collecting box for humidification, the risk of clogging of the atomizing humidifier is greatly reduced, ensuring the safety of users.

[0018] In a further solution, the second water collecting box is provided with a first chamber and a second chamber, and the first chamber and the second chamber are separated by a partition, and the partition extends from the bottom to the top of the second water collecting box, and the partition and the top of the second water collecting box cooperate to form a channel connecting the first chamber and the second chamber; the liquid inlet end of the humidifier is connected to the first chamber, and the osmotic water inlet end of the membrane distillation device is connected to the second chamber.

[0019] It can be seen that by setting a partition to divide the second water collecting box into a first chamber and a second chamber, the first chamber is connected to the liquid inlet end of the humidifier, and the second chamber is connected to the osmotic water inlet end of the membrane distillation device, which can avoid interference between the water used by the humidifier and the circulating water of the membrane distillation device and ensure the stability of the operation of both.

[0020] In a further solution, the spray assembly includes a spray water tank, a spray head and a spray water pump. The first water collection tank supplies water to the spray water tank. The liquid inlet end of the spray head is connected to the liquid outlet end of the spray water tank through the spray water pump. The spray head is installed above the outdoor heat exchanger.

[0021] It can be seen that the spray assembly is provided with a spray water tank for collecting cooling water from the first water collection tank, so that the spray assembly can ensure that there is enough water in the spray water tank when spraying the outdoor heat exchanger, thereby ensuring stable operation of the spray assembly.

[0022] In order to achieve the second purpose of the present invention, the present invention provides a working method of an air conditioner, including: obtaining the current heat exchange mode of the air conditioner; if the current heat exchange mode is the cooling mode, determining whether the liquid level of the first water collecting box exceeds the first preset liquid level, and if so, when obtaining the membrane distillation purification operation instruction, starting the first circulating water pump and the second circulating water pump to perform the membrane distillation purification operation.

[0023] It can be seen from the above scheme that the working method of the air conditioner of the present invention is to start the first circulating water pump and the second circulating water pump in the cooling mode to perform membrane distillation purification operation, and the recovered condensed water can be purified based on membrane distillation. It can solve the problem that the multi-stage filtration system in the current condensed water recovery device involves a lot of filtration materials, the filtration device is complex, and it is not easy to replace. It simplifies the filtration process, and uses membrane distillation for purification, which can reduce energy consumption and achieve energy saving. At the same time, it also solves the problem that similar adsorption bag filtration processes are easily saturated with adsorption, resulting in low efficiency in the recovery and purification of condensed water.

[0024] In a further solution, the second water collecting box is provided with a cooling device for cooling the liquid in the second water collecting box; after the step of starting the first circulating water pump and the second circulating water pump, it also includes: starting the cooling device to cool the liquid in the second water collecting box.

[0025] It can be seen that by turning on the cooling device to cool the liquid in the second water collecting box, the temperature of the liquid in the second water collecting box can be further reduced, the temperature difference between the feed side and the osmotic pressure side of the membrane distillation device can be increased, and the purification speed of the membrane distillation device can be accelerated.

[0026] In a further scheme, the spray assembly includes a spray water tank, a spray head and a spray water pump. The first water collection tank supplies water to the spray water tank. The liquid inlet end of the spray head is connected to the liquid outlet end of the spray water tank through the spray water pump. The spray head is installed above the outdoor heat exchanger; the method also includes: if the current heat exchange mode is the cooling mode, determine whether the liquid level of the spray water tank exceeds the second preset liquid level. If so, when it is necessary to spray the outdoor heat exchanger, turn on the spray water pump to spray and cool the outdoor heat exchanger.

[0027] It can be seen that the spray water pump is turned on to spray and cool the outdoor heat exchanger only when the liquid level in the spray water tank exceeds the second preset liquid level, which can ensure that there is enough water in the spray water tank for spraying operation.

[0028] In a further solution, a heating device for heating the liquid in the first water collecting box is provided in the first water collecting box; after the step of obtaining the current heat exchange mode of the air conditioner, it also includes: if the current heat exchange mode is the heating mode, judging whether the liquid level of the first water collecting box exceeds the third preset liquid level, and if so, turning on the heating device to heat the liquid in the first water collecting box; when the temperature of the liquid in the first water collecting box is greater than the preset temperature, when the membrane distillation purification operation instruction is obtained, turning on the first circulating water pump and the second circulating water pump to perform the membrane distillation purification operation.

[0029] It can be seen that in the heating mode, the liquid temperature in the first water collecting box is low. Therefore, it is necessary to turn on the heating device for heating to ensure the temperature difference between the feed side and the permeate side of the membrane distillation device, so as to perform purification operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The present invention is an embodiment of an air conditioner capable of recycling and purifying condensed water, and is a structural principle diagram of the air conditioner during heating.

[0031] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0032] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0033] Figure 4 It is a flow chart of an embodiment of the working method of the air conditioner of the present invention.

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0035] Example of an air conditioner capable of recycling and purifying condensed water: like Figure 1 、 Figure 2 and Figure 3 As shown, in this embodiment, the air conditioner that can recycle and purify condensed water includes an indoor unit 1, an outdoor unit 2, a spray assembly and a purification assembly. The indoor unit 1 is provided with an indoor heat exchanger 3, and the outdoor unit 2 is provided with an outdoor heat exchanger 4, a compressor 5, a four-way valve 6 and a first throttle valve 7. The indoor heat exchanger 3, the outdoor heat exchanger 4, the compressor 5, the four-way valve 6 and the first throttle valve 7 are connected through a refrigerant circuit. This is a well-known technology for those skilled in the art and will not be repeated here.

[0036] The indoor unit 1 is equipped with a first sump 8 for recovering condensed water, and the outdoor unit 2 is equipped with a second sump 9. The first sump 8 is located below the indoor heat exchanger 3, while the second sump 9 is mounted below the outdoor heat exchanger 4. The water inlet of the spray assembly is connected to the water outlet of the first sump 8, and the water outlet of the spray assembly is mounted above the outdoor heat exchanger 4 of the outdoor unit 2. In this embodiment, the spray assembly includes a spray water tank 10, a spray water pump 11, and a spray head 12. The first sump 8 supplies water to the spray water tank 10. The liquid inlet of the spray head 12 is connected to the liquid outlet of the spray water tank 10 via the spray water pump 11. The spray head 12 is mounted above the outdoor heat exchanger 4. The spray water tank 10 is used to collect cooling water from the first sump 8. This ensures that the spray assembly has sufficient water in the spray water tank 10 when spraying the outdoor heat exchanger 4, ensuring stable operation of the spray assembly.

[0037] In this embodiment, the purification assembly includes a membrane distillation apparatus 13, a first water collection box 14, a second water collection box 15, a first circulating water pump 16, and a second circulating water pump 17. The first water collection box 14 is connected to the second water collection tank 9. The feed-side water inlet of the membrane distillation apparatus 13 is connected to the first water collection box 14 via the first circulating water pump 16, and the feed-side water outlet of the membrane distillation apparatus 13 is connected to the first water collection box 14. The osmotic side water inlet of the membrane distillation apparatus 13 is connected to the second water collection box 15 via the second circulating water pump 17, and the osmotic side water outlet of the membrane distillation apparatus 13 is connected to the second water collection box 15. The membrane distillation apparatus 13 uses direct membrane distillation. The principle of direct membrane distillation is to form a vapor pressure difference based on the temperature difference between the feed side and the osmotic side. Water vapor on the high-temperature side passes through the hydrophobic porous membrane material in the membrane distillation apparatus 13 and enters the low-temperature side to be condensed, thereby achieving purification of the condensed water.

[0038] The first water collection box 14 is provided with a heating device for heating the liquid in the first water collection box 14. The heating device in the first water collection box 14 can be used to heat the liquid in the first water collection box 14 when the air conditioner is in the heating mode, maintaining an appropriate temperature difference between the feed side and the permeate side of the membrane distillation device 13, thereby achieving membrane distillation purification. In this embodiment, the heating device includes a heating copper tube 18 through which refrigerant flows, and a first control valve 19. The heating copper tube 18 is connected in parallel to the high-temperature side of the refrigerant circuit when the air conditioner is in the heating mode. The input end of the heating copper tube 18 is connected to the refrigerant circuit via the first control valve 19. The first control valve 19 is used to control the flow of refrigerant in the heating copper tube 18. When the first control valve 19 is open, refrigerant in the refrigerant circuit enters the heating copper tube 18, thereby causing the heating copper tube 18 to heat the liquid in the first water collection box 14. When the first control valve 19 is closed, refrigerant in the refrigerant circuit stops entering the heating copper tube 18, thereby stopping heating the liquid in the first water collection box 14. By connecting the heating copper tube 18 in parallel to the high temperature side of the refrigerant circuit when the air conditioner is heating, the liquid in the first water collecting box 14 can be heated by the refrigerant without adding an additional heating device, thereby reducing costs. Of course, the heating device can also be an electric heater.

[0039] In this embodiment, the second water collection box 15 is provided with a cooling device for cooling the liquid therein. By providing the cooling device in the second water collection box 15, the liquid therein is cooled, maintaining an appropriate temperature difference between the feed side and the permeate side of the membrane distillation apparatus 13, thereby achieving membrane distillation purification. In this embodiment, the cooling device includes a condensing copper tube 20 through which refrigerant flows, and a second control valve 21. The condensing copper tube 20 is connected in parallel to the low-temperature side of the refrigerant circuit during cooling in the air conditioner. The input end of the condensing copper tube 20 is connected to the refrigerant circuit via the second control valve 21. The second control valve 21 controls the flow of refrigerant in the condensing copper tube 20. When the second control valve 21 is open, refrigerant in the refrigerant circuit enters the condensing copper tube 20, thereby cooling the liquid in the second water collection box 15. When the second control valve 21 is closed, refrigerant in the refrigerant circuit stops entering the condensing copper tube 20, thereby stopping cooling the liquid in the second water collection box 15. By connecting the condensing copper tube 20 in parallel to the low-temperature side of the refrigerant circuit during cooling of the air conditioner, the refrigerant can be used to cool the liquid in the first water collecting box 14 without adding additional cooling devices, thereby reducing costs.

[0040] In this embodiment, the cooling device also includes a second throttle valve 22 and a one-way valve 23. The second throttle valve 22 is arranged between the second control valve 21 and the input end of the condensing copper tube 20 to control the amount of refrigerant entering the condensing copper tube 20. The one-way valve 23 is arranged at the output end of the condensing copper tube 20 to prevent backflow.

[0041] In this embodiment, the indoor unit 1 is further equipped with a humidifier 24. The liquid inlet of the humidifier 24 is connected to the second water collection box 15 via a third control valve 25, and the water outlet of the humidifier 24 is connected to the input of a spray nozzle 26. The humidifier 24 can be a well-known atomizing humidifier. By providing the humidifier 24, the purified cooling water in the second water collection box 15 is used for humidification, which greatly reduces the risk of clogging of the atomizing humidifier 24 and ensures user safety.

[0042] In this embodiment, the second water collection box 15 is provided with a first chamber 151 and a second chamber 152, separated by a partition 153 extending from the bottom to the top of the second water collection box 15. The partition 153 and the top of the second water collection box 15 cooperate to form a channel connecting the first and second chambers 151, 152. Once the liquid level in the second chamber 152 exceeds the partition 153, it can flow into the first chamber 151 through the channel formed by the partition 153 and the top of the second water collection box 15. The liquid inlet of the humidifier 24 is connected to the first chamber 151, and the osmotic water inlet of the membrane distillation apparatus 13 is connected to the second chamber 152. By setting a partition 153, the second water collecting box 15 is divided into a first chamber 151 and a second chamber 152. The first chamber 151 is connected to the liquid inlet end of the humidifier 24, and the second chamber 152 is connected to the osmotic water inlet end of the membrane distillation device 13. This can avoid interference between the water used by the humidifier 24 and the circulating water of the membrane distillation device 13, thereby ensuring the stability of the operation of both.

[0043] In addition, the humidifier 24 is provided with a drain port 27, which can drain the water in the first chamber 151 to the outside for storage when the water level in the first chamber 151 is too high. A water inlet 28 is also provided in the passage between the second circulating water pump 17 and the second water collection box 15. The water inlet 28 is equipped with a water inlet control valve 29. The water inlet 28 is used to connect to an external water source. When the water level in the first chamber 151 is insufficient to support the operation of the humidifier 24, the water inlet control valve 29 is opened to allow the external water source to replenish the second chamber 152 and then the first chamber 151.

[0044] See also Figure 4 When the air conditioner capable of recycling and purifying condensed water in this embodiment is in operation, step S1 is first performed to obtain the current heat exchange mode of the air conditioner. The current heat exchange mode can be obtained by reading the operating status data of the air conditioner. The heat exchange mode includes cooling mode or heating mode.

[0045] After obtaining the current heat exchange mode of the air conditioner, step S2 is executed to determine whether the current heat exchange mode is cooling mode. If the current heat exchange mode is cooling mode, step S3 is executed to determine whether the liquid level in the first water collection box 14 exceeds a first preset liquid level. The first preset liquid level can be pre-set based on experimental data.

[0046] If the liquid level of the first water collecting box 14 does not exceed the first preset liquid level, continue to execute step S3 and perform continuous detection. If the liquid level of the first water collecting box 14 exceeds the first preset liquid level, execute step S4, and when the membrane distillation purification operation instruction is obtained, turn on the first circulating water pump 16 and the second circulating water pump 17 to perform the membrane distillation purification operation. If the liquid level of the first water collecting box 14 exceeds the first preset liquid level, the requirements for performing the membrane distillation purification operation are met. Therefore, when the membrane distillation purification operation instruction is obtained, the first circulating water pump 16 and the second circulating water pump 17 can be turned on to perform the distillation work. The membrane distillation purification operation instruction can be obtained when it is determined that the liquid level of the first water collecting box 14 exceeds the first preset liquid level.

[0047] In this embodiment, in the cooling mode, after starting the first circulating water pump 16 and the second circulating water pump 17, the further step includes starting a cooling device to cool the liquid in the second water collection box 15. By starting the cooling device to cool the liquid in the second water collection box 15, the temperature of the liquid in the second water collection box 15 is further reduced, thereby increasing the temperature difference between the feed side and the permeate side of the membrane distillation apparatus 13, and accelerating the purification speed of the membrane distillation apparatus 13.

[0048] In this embodiment, if the current heat exchange mode is cooling mode, a determination is made as to whether the liquid level in the spray water tank 10 exceeds a second preset liquid level. If so, the spray water pump 12 is activated to spray and cool the outdoor heat exchanger 4 when spraying is required. The second preset liquid level can be pre-set based on experimental data. The spray water pump 12 is activated to spray and cool the outdoor heat exchanger 4 only when the liquid level in the spray water tank 10 exceeds the second preset liquid level, ensuring that the spray water tank 10 has sufficient water for the spraying operation. In this embodiment, when the temperature of the outdoor heat exchanger 4 exceeds the preset temperature value, it is determined that the outdoor heat exchanger 4 requires spraying.

[0049] When executing step S2, if the current heat exchange mode is not the cooling mode, step S5 is executed to determine whether the current heat exchange mode is the heating mode. If the current heat exchange mode is not the heating mode, step S1 is returned to re-acquire the current heat exchange mode.

[0050] If the current heat exchange mode is the heating mode, step S6 is executed to determine whether the liquid level of the first water collecting box 14 exceeds the third preset liquid level. The third preset liquid level can be pre-set according to experimental data. Preferably, the third preset liquid level is equal to the first preset liquid level. If the liquid level of the first water collecting box 14 does not exceed the third preset liquid level, step S6 is continued to be executed for continuous detection. If the liquid level of the first water collecting box 14 exceeds the third preset liquid level, step S7 is executed to turn on the heating device to heat the liquid in the first water collecting box 14. In the heating mode, the temperature of the liquid in the first water collecting box 14 is relatively low. Therefore, it is necessary to turn on the heating device for heating to ensure the temperature difference between the feed side and the osmotic pressure measurement of the membrane distillation device 13, so as to perform purification operations.

[0051] After the heating device is turned on to heat the liquid in the first water collecting box 14, step S8 is executed to determine whether the temperature of the liquid in the first water collecting box 14 is greater than a preset temperature. The preset temperature can be pre-set according to experimental data.

[0052] If the temperature of the liquid in the first water collecting box 14 is not greater than the preset temperature, continue to execute step S8 for continuous detection. When the temperature of the liquid in the first water collecting box 14 is greater than the preset temperature, execute step S4, and when the membrane distillation purification operation instruction is obtained, turn on the first circulating water pump 16 and the second circulating water pump 17 to perform the membrane distillation purification operation. If the temperature of the liquid in the first water collecting box 14 is greater than the preset temperature, it means that the temperature of the liquid in the first water collecting box 14 meets the temperature requirement and the membrane distillation purification operation can be performed. In the heating state, the membrane distillation purification operation instruction can be obtained when it is confirmed that the temperature of the liquid in the first water collecting box 14 is greater than the preset temperature.

[0053] In addition, when the air conditioner is running, the indoor environment humidity of the indoor unit 1 can also be obtained. When the indoor environment humidity is lower than the preset humidity, the humidifier 24 is turned on to perform a humidification operation.

[0054] From the above, it can be seen that the air conditioner of the present invention that can recycle and purify condensed water, by setting a membrane distillation device 13, purifies the recovered condensed water based on membrane distillation, which can solve the problem that the multi-stage filtration system in the current condensed water recovery device involves a lot of filtration materials, the filtration device is complex, and it is not easy to replace. It simplifies the filtration process, and uses membrane distillation for purification, which can reduce energy consumption and achieve energy saving. At the same time, it also solves the problem that similar adsorption bag filtration processes are easily saturated with adsorption, resulting in low efficiency in the recovery and purification of condensed water.

[0055] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept also fall within the scope of protection of the present invention.

Claims

1. An air conditioner capable of recovering and purifying condensed water, comprising an indoor unit, an outdoor unit, and a spray assembly, wherein the indoor unit is provided with a first water collection tank for recovering condensed water, the outdoor unit is provided with a second water collection tank, a water inlet of the spray assembly is connected to a water outlet of the first water collection tank, the water outlet of the spray assembly is mounted above an outdoor heat exchanger of the outdoor unit, and the second water collection tank is mounted below the outdoor heat exchanger; Its characteristics are: The air conditioner is also provided with a purification component, which includes a membrane distillation device, a first water collecting box, a second water collecting box, a first circulating water pump and a second circulating water pump. The first water collecting box is connected to the second water collecting tank, the feed side water inlet end of the membrane distillation device is connected to the first water collecting box through the first circulating water pump, the feed side water outlet end of the membrane distillation device is connected to the first water collecting box, the osmotic side water inlet end of the membrane distillation device is connected to the second water collecting box through the second circulating water pump, and the osmotic side water outlet end of the membrane distillation device is connected to the second water collecting box.

2. The air conditioner capable of recycling and purifying condensed water according to claim 1, characterized in that: The first water collecting box is provided with a heating device for heating the liquid in the first water collecting box.

3. The air conditioner capable of recycling and purifying condensed water according to claim 2, characterized in that: The heating device includes a heating copper tube for circulating refrigerant, and the heating copper tube is connected in parallel to the high-temperature side of the refrigerant circuit when the air conditioner is heating.

4. The air conditioner capable of recycling and purifying condensed water according to claim 1, characterized in that: The second water collecting box is provided with a cooling device for cooling the liquid in the second water collecting box.

5. The air conditioner capable of recycling and purifying condensed water according to claim 4, characterized in that: The cooling device includes a condensing copper tube for circulating refrigerant, and the condensing copper tube is connected in parallel to the low-temperature side of the refrigerant circuit when the air conditioner is cooling.

6. The air conditioner capable of recovering and purifying condensed water according to any one of claims 1 to 5, characterized in that: The indoor unit is further provided with a humidifier, and the liquid inlet end of the humidifier is communicated with the second water collecting box.

7. The air conditioner capable of recovering and purifying condensed water according to claim 6, characterized in that: The second water collecting box is provided with a first chamber and a second chamber, the first chamber and the second chamber are separated by a partition, the partition extends from the bottom to the top of the second water collecting box, and the partition and the top of the second water collecting box cooperate to form a channel connecting the first chamber and the second chamber; The liquid inlet end of the humidifier is communicated with the first chamber, and the osmotic water inlet end of the membrane distillation device is communicated with the second chamber.

8. The air conditioner capable of recovering and purifying condensed water according to any one of claims 1 to 5, characterized in that: The spray assembly includes a spray water tank, a spray head and a spray water pump. The first water collecting tank supplies water to the spray water tank. The liquid inlet end of the spray head is connected to the liquid outlet end of the spray water tank through the spray water pump. The spray head is installed above the outdoor heat exchanger.

9. An operating method for an air conditioner, the method being applied to an air conditioner comprising an indoor unit, an outdoor unit, and a spray assembly, the indoor unit being provided with a first water collection tank for recovering condensed water, the outdoor unit being provided with a second water collection tank, the water inlet of the spray assembly being connected to the water outlet of the first water collection tank, the water outlet of the spray assembly being mounted above an outdoor heat exchanger of the outdoor unit, and the second water collection tank being mounted below the outdoor heat exchanger; Its characteristics are: The air conditioner is further provided with a purification component, which includes a membrane distillation device, a first water collecting box, a second water collecting box, a first circulating water pump and a second circulating water pump, the first water collecting box is connected to the second water collecting tank, the feed side water inlet of the membrane distillation device is connected to the first water collecting box through the first circulating water pump, the feed side water outlet of the membrane distillation device is connected to the first water collecting box, the osmotic side water inlet of the membrane distillation device is connected to the second water collecting box through the second circulating water pump, and the osmotic side water outlet of the membrane distillation device is connected to the second water collecting box; The method comprises: Obtaining a current heat exchange mode of the air conditioner; If the current heat exchange mode is the cooling mode, determine whether the liquid level of the first water collecting box exceeds the first preset liquid level. If so, when the membrane distillation purification operation instruction is obtained, turn on the first circulating water pump and the second circulating water pump to perform the membrane distillation purification operation.

10. The operating method of the air conditioner according to claim 9, characterized in that: The second water collecting box is provided with a cooling device for cooling the liquid in the second water collecting box; After the step of starting the first circulating water pump and the second circulating water pump, the method further includes: The cooling device is turned on to cool the liquid in the second water collecting box.

11. The operating method of the air conditioner according to claim 9, characterized in that: The spray assembly includes a spray water tank, a spray head and a spray water pump. The first water collecting tank supplies water to the spray water tank. The liquid inlet end of the spray head is connected to the liquid outlet end of the spray water tank through the spray water pump. The spray head is installed above the outdoor heat exchanger. The method further comprises: If the current heat exchange mode is the cooling mode, determine whether the liquid level of the spray water tank exceeds the second preset liquid level. If so, when it is necessary to spray the outdoor heat exchanger, turn on the spray water pump to spray and cool the outdoor heat exchanger.

12. The operating method of an air conditioner according to any one of claims 9 to 11, characterized in that: The first water collecting box is provided with a heating device for heating the liquid in the first water collecting box; After the step of obtaining the current heat exchange mode of the air conditioner, the method further includes: If the current heat exchange mode is the heating mode, determining whether the liquid level of the first water collecting box exceeds a third preset liquid level, and if so, turning on the heating device to heat the liquid in the first water collecting box; When the temperature of the liquid in the first water collecting box is greater than a preset temperature, upon obtaining an instruction to perform a membrane distillation purification operation, the first circulating water pump and the second circulating water pump are turned on to perform a membrane distillation purification operation.

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