Condensate water treatment system and control method for a refrigerated extractor hood

Abstract

A condensate water treatment system and control method of a refrigeration type range hood, comprising a compressor, an indoor unit module, an outdoor unit module and a water storage box, the indoor unit module comprising an evaporator and an indoor unit fan, the indoor unit fan having a volute and an impeller, an indoor unit water pan being arranged below the evaporator, a drain opening being formed in the bottom of the indoor unit water pan, the volute being connected to the indoor unit water pan through a water passage hole in the bottom, an inlet of a three-way valve being connected to the drain opening, a first outlet of the three-way valve being connected to a water inlet end of a clean water inlet pipe, a second outlet of the three-way valve being connected to a water inlet end of a sewage inlet pipe, the water storage box being divided into a clean water area and a sewage area, a water outlet end of the clean water inlet pipe being connected to the clean water area, and a water outlet end of the sewage inlet pipe being connected to the sewage area. The condensate water treatment system of the refrigeration type range hood can perform self-cleaning of the evaporator and cleaning of the impeller of the indoor unit fan, and the sewage generated after self-cleaning can flow into the sewage area of the water storage box through the sewage pipe, avoiding mixing with the clean condensate water in the clean water area.

Description

Technical Field

[0001] This invention relates to a refrigerated range hood, and more particularly to a condensate treatment system and control method for a refrigerated range hood. Background Technology

[0002] Existing technologies disclose various refrigeration-type range hoods, which add an air conditioning component to a range hood platform, thus achieving both the functions of a range hood and an air conditioner. The air conditioning component includes an indoor unit module and an outdoor unit module. The indoor unit module includes an evaporator and an indoor fan, while the outdoor unit module includes a condenser and an outdoor fan. Because refrigeration-type range hoods are installed in the oily fume environment of a kitchen, and the return air of the indoor unit module typically uses indoor return air, dust and grease will accumulate on the evaporator surface and the impeller of the indoor fan after prolonged use. Timely cleaning is necessary; otherwise, the air quality of the air supplied by the air conditioner will decrease, affecting the user experience and potentially impacting the normal operation of the refrigeration system. Currently, existing air-conditioning-type range hoods only offer condenser self-cleaning. For example, the Chinese utility model patent with patent number 202220040537.0 (authorized public number CN 217685714 U) discloses "A water pump flow control system and an air-conditioning type range hood". When working in air-conditioning mode (cooling mode), the condensate water condensed on the evaporator flows into the water collection tray. The condensate water in the water collection tray flows into the water box through the water inlet pipe. Under the action of the water pump, the condensate water in the water box is transported to the liquid distributor through the water outlet pipe, and then flows from the liquid distributor to the surface of the condenser. On the one hand, it cools the condenser and further improves its heat exchange effect, realizing the effective utilization of condensate water. On the other hand, after the condensate water is heated and evaporated by the condenser, it is discharged from the first exhaust channel. The condensate water that is not evaporated flows into the water collection box, and then flows back to the water box through the return water pipe for reuse. This air-conditioning type range hood can only perform condenser self-cleaning, and the wastewater from the cleaning process is not discharged separately but accumulates in the water storage box. When the water pump operates again, the wastewater will clog the pump, causing damage. Furthermore, the wastewater accumulation in the water storage box also leads to unpleasant odors. In conclusion, further improvements are needed to the condensate treatment system of the existing refrigeration type range hood. Summary of the Invention

[0003] The first technical problem to be solved by the present invention is to provide a condensate treatment system for a refrigerated range hood that can achieve self-cleaning of the evaporator and the indoor unit fan, in light of the above-mentioned existing technology.

[0004] The second technical problem to be solved by the present invention is to provide a control method for the above-mentioned condensate treatment system in view of the current state of the prior art.

[0005] The technical solution adopted by the present invention to solve the first technical problem mentioned above is as follows: a condensate treatment system for a refrigerated range hood, comprising a compressor, an indoor unit module, an outdoor unit module, and a water storage box. The indoor unit module includes an evaporator and an indoor unit fan. The indoor unit fan has a volute and an impeller installed inside the volute. The system is characterized in that: an indoor unit water receiving tray is provided below the evaporator, and a drain outlet is opened at the bottom of the indoor unit water receiving tray. A water passage hole is opened at the bottom of the volute, and the volute is connected to the indoor unit water receiving tray through the water passage hole. The system also includes a clean water inlet pipe, a wastewater inlet pipe, and a three-way valve. The inlet of the three-way valve is connected to the drain outlet, the first outlet of the three-way valve is connected to the inlet end of the clean water inlet pipe, and the second outlet of the three-way valve is connected to the inlet end of the wastewater inlet pipe. The water storage box is divided into a clean water area and a wastewater area. The outlet end of the clean water inlet pipe is connected to the clean water area, and the outlet end of the wastewater inlet pipe is connected to the wastewater area.

[0006] A water level sensor is installed in the indoor unit's water tray to detect whether the water level in the tray has reached the level required for washing.

[0007] In order for the wastewater after cleaning the indoor unit fan impeller to be discharged smoothly from the drain outlet, the drain outlet is lower than the water passage hole.

[0008] Preferably, the indoor unit's water receiving tray is sealed to the volute, or the indoor unit's water receiving tray and the volute are an integral part.

[0009] To prevent clean water and wastewater from mixing, the clean water area and the wastewater area are separated by a dam. The wastewater area is equipped with an overflow outlet. The height of the dam is higher than the height of the overflow outlet and lower than the edge height of the water storage box.

[0010] To facilitate the flow of water overflowing from the clean water area to the sewage area, the depth of the clean water area is less than the depth of the sewage area.

[0011] The indoor unit module can have various assembly structures. Preferably, the indoor unit module includes an indoor unit housing, the evaporator is installed inside the indoor unit housing, the indoor unit water receiving tray is installed at the bottom of the indoor unit housing, and the indoor unit fan is installed on the side of the indoor unit housing.

[0012] To allow unused condensate from the condenser to flow back into the water storage box, the outdoor unit module includes an outdoor unit housing and a condenser and cooling fan mounted on the housing. The bottom of the outdoor unit housing has a condensate return port, and it also includes an outlet pipe and a return pipe. Condensate in the clean water zone is transported to the condenser through the outlet pipe, while condensate flowing from the condensate return port flows into the water storage box through the return pipe. If the condensate is used to cool the condenser, it flows back to the clean water zone; if it is used to clean the condenser, it flows back to the wastewater zone.

[0013] In order to evenly distribute the condensate from the water purification area onto the condenser, a water pump is installed in the water storage box, and a distributor is installed on the top of the condenser to distribute liquid to the condenser. The outlet of the water outlet pipe is connected to the inlet of the distributor. The condensate in the water purification area is transported to the condenser through the water pump, the water outlet pipe, and the distributor.

[0014] The technical solution adopted by the present invention to solve the second technical problem mentioned above is: a control method for the condensate treatment system of the refrigeration range hood, characterized by including the following steps:

[0015] S1, Power on;

[0016] S2. Activate evaporator self-cleaning;

[0017] S3, the three-way valve opens the sewage channel;

[0018] S4. The indoor unit fan is turned off, and the evaporator begins to condense and defrost to perform self-cleaning, producing wastewater after cleaning.

[0019] S5. Wastewater from cleaning the evaporator flows into the wastewater area of ​​the water storage box through the wastewater inlet pipe, and then flows into the oil cup through the overflow outlet.

[0020] S6, the three-way valve is fully closed, both the clean water channel and the sewage channel are closed;

[0021] S7. The indoor unit fan starts at its lowest speed, the evaporator produces condensate, and water begins to accumulate in the indoor unit's drip tray.

[0022] S8. Determine if the water level in the indoor unit's drip tray has reached the washable level.

[0023] If so, the cooling system will be shut down, the indoor unit fan will continue to run at low speed, and then proceed to step S9;

[0024] If not, return to step S7;

[0025] S9. The indoor unit fan continues to run at the lowest speed to clean the indoor unit fan impeller;

[0026] S10. After the indoor unit fan impeller is cleaned, open the sewage channel with the three-way valve.

[0027] S11. Wastewater from cleaning the indoor unit impeller flows into the wastewater area of ​​the water storage box through the wastewater inlet pipe, and then flows into the oil cup through the overflow outlet.

[0028] S12. Prompt the user to pour oil into the cup.

[0029] A further preferred embodiment of the control method for the condensate treatment system of the refrigerated range hood is characterized by comprising the following steps:

[0030] S1, Power on;

[0031] S2. Activate evaporator self-cleaning;

[0032] S3, the three-way valve opens the sewage channel;

[0033] S4. The indoor unit fan is turned off, and the evaporator begins to condense and defrost to perform self-cleaning, producing wastewater after cleaning.

[0034] S5. Wastewater from cleaning the evaporator flows into the wastewater area of ​​the water storage box through the wastewater inlet pipe, and then flows into the oil cup through the overflow outlet.

[0035] S6, the three-way valve is fully closed, both the clean water channel and the sewage channel are closed;

[0036] S7. The indoor unit fan is off, the evaporator begins to condense and defrost, producing condensate water, which begins to accumulate in the indoor unit's drip tray.

[0037] S8. Determine if the water level in the indoor unit's drip tray has reached the washable level.

[0038] If so, shut down the cooling system and proceed to step S9;

[0039] If not, return to step S7;

[0040] S9. Turn on the indoor unit fan and run at the lowest speed to clean the indoor unit fan impeller;

[0041] S10. After the indoor unit fan impeller is cleaned, open the sewage channel with the three-way valve.

[0042] S11. Wastewater from cleaning the indoor unit impeller flows into the wastewater area of ​​the water storage box through the wastewater inlet pipe, and then flows into the oil cup through the overflow outlet.

[0043] S12. Prompt the user to pour oil into the cup.

[0044] Compared with the prior art, the advantages of the present invention are as follows: the condensate treatment system of the refrigeration range hood can not only perform evaporator self-cleaning, but also the volute of the indoor unit fan is connected to the indoor unit water receiving tray below the evaporator through the water passage. When the water level sensor detects that the water level has reached the cleanable level, the impeller of the indoor unit fan can be cleaned with condensate. By switching the three-way valve, the sewage generated after the evaporator self-cleaning and the sewage generated after the fan self-cleaning flow into the sewage area of ​​the water storage box through the sewage pipe, avoiding mixing with the clean condensate in the clean water area. The water pump delivers the condensate in the clean water area to the condenser. The sewage will not clog the water pump and cause damage to the water pump. Moreover, the sewage in the water storage box can be discharged in time to avoid the water storage box from producing odors. Attached Figure Description

[0045] Figure 1This is a schematic diagram of the condensate treatment system of a refrigerated range hood according to an embodiment of the present invention;

[0046] Figure 2 for Figure 1 A schematic diagram of the condensate treatment system from another angle;

[0047] Figure 3 for Figure 1 The diagram shows a condensate treatment system from another different angle.

[0048] Figure 4 This is a schematic diagram of the water storage box according to an embodiment of the present invention;

[0049] Figure 5 A structural cross-sectional view of the internal unit module of this embodiment of the invention;

[0050] Figure 6 This is a schematic diagram of the normal operating water circulation system of the condensate treatment system according to an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of the process when the evaporator self-cleaning system of the condensate treatment system of this invention is activated according to an embodiment of the invention.

[0052] Figure 8 This is a schematic diagram of the process when the condensate treatment system of this invention starts the condenser self-cleaning function. Detailed Implementation

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0054] like Figures 1 to 5 As shown, the condensate treatment system of the refrigerated range hood in this embodiment includes main components such as compressor 1, indoor unit module 2, outdoor unit module 3, water storage box 4, clean water inlet pipe 51, sewage inlet pipe 52, three-way valve 53, water outlet pipe 54, water return pipe 55, water pump 56, and liquid distributor 6.

[0055] The indoor unit module 2 includes an indoor unit housing 21, an evaporator 22, and an indoor unit fan 23. The outdoor unit module 3 includes an outdoor unit housing 31, a condenser 32, and a cooling fan 33. The indoor unit module 2 and the outdoor unit module 3 are arranged adjacent to each other. Along the airflow direction, the indoor unit fan 23 is located downstream of the evaporator 22, and the cooling fan 33 is located downstream of the condenser 32. The compressor 1, condenser 32, and evaporator 22 are connected by refrigerant piping. The compressor 1, condenser 32, and evaporator 22 constitute an air conditioning assembly. After the compressor 1 starts, condensate will condense on the surface of the evaporator 22, producing condensate. Its working principle is the same as that of existing air conditioners and will not be described in detail here.

[0056] The evaporator 22 is installed inside the indoor unit housing 21. An indoor unit condensate tray 24 is installed at the bottom of the indoor unit housing 21, located below the evaporator 22. Condensate condensing on the surface of the evaporator 22 flows into the indoor unit condensate tray 24. A water level sensor 25 is installed inside the indoor unit condensate tray 24 to detect the water level. A drain outlet 241 is located at the bottom of the indoor unit condensate tray 24. The indoor unit fan 23 is located on the side of the indoor unit housing 21. The indoor unit fan 23 is a centrifugal fan, consisting of a volute 231 and an impeller 232 installed inside the volute 231. A water passage hole 233 is located at the bottom of the volute 231, connecting the volute 231 to the indoor unit condensate tray 24. The drain outlet 241 is lower than the water passage hole 233. The indoor unit condensate tray 24 can be sealed to the volute 231 or integrated with it as a single piece.

[0057] The water storage box 4 is divided into a clean water zone 41 and a wastewater zone 42. The depth of the clean water zone 41 is less than the depth of the wastewater zone 42. The clean water zone 41 and the wastewater zone 42 are separated by a dam 43. The wastewater zone 42 is equipped with an overflow outlet 44. The height of the dam 43 is higher than the height of the overflow outlet 44, and the height of the dam 43 is lower than the edge height of the water storage box 4, which effectively prevents the clean water and wastewater from mixing and facilitates the smooth flow of wastewater.

[0058] The inlet of the three-way valve 53 is connected to the drain outlet 241. The first outlet of the three-way valve 53 is connected to the inlet of the clean water inlet pipe 51. The second outlet of the three-way valve 53 is connected to the inlet of the sewage inlet pipe 52. The outlet of the clean water inlet pipe 51 is connected to the clean water area 41. The outlet of the sewage inlet pipe 52 is connected to the sewage area 42.

[0059] The outdoor unit module 3 includes an outdoor unit housing 31 and a condenser 32 and a cooling fan 33 mounted on the outdoor unit housing 31. A condensate return inlet 311 is located at the bottom of the outdoor unit housing 31. A water pump 56 is installed inside the water storage box 4. A distributor 6 is installed on top of the condenser 32 to distribute liquid to the condenser 32. The outlet of the water outlet pipe 54 is connected to the inlet of the distributor 6. Condensate in the clean water zone is transported to the condenser 32 via the water pump 56, the outlet pipe 54, and the distributor. Unused condensate from the condenser 32 flows back from the condensate return inlet 311 and into the water storage box 4 via the return pipe 55. In this embodiment, the return pipe 55 is connected to the clean water zone of the water storage box 4, allowing a portion of the condensate used to cool the condenser 32 to flow back to the clean water zone 41 for recycling. In addition, the return water pipe 55 can also be connected to the sewage area 42 of the water storage box 4, so that when cleaning the condenser 32, the returned sewage can flow into the sewage area 42.

[0060] like Figure 6 As shown, the control method for the condensate treatment system of this refrigerated range hood includes the following steps:

[0061] A1. Power is on;

[0062] A2. Turn on the cooling system;

[0063] A3. Three-way valve 53 opens the clean water channel;

[0064] A4. Evaporator 22 produces condensate;

[0065] A5. Condensate flows into the clean water inlet pipe 51, and then into the clean water area 41 of the water storage box 4;

[0066] A6. Turn on the water pump 56 and pump the condensate in the clean water area 41 to the condenser 32 through the water outlet pipe 54 for evaporative heat dissipation.

[0067] A7. The condensate that cannot be evaporated by the condenser 32 flows back to the clean water area 41 of the water storage box 4 through the return water pipe for recycling.

[0068] The above process describes the condensate circulation process during normal operation of the refrigeration system.

[0069] like Figure 7 As shown, when the system activates the evaporator self-cleaning and indoor unit impeller self-cleaning functions, a control method for the condensate treatment system of this refrigeration range hood includes the following steps:

[0070] S1, Power on;

[0071] S2, activate evaporator 22 self-cleaning;

[0072] S3, Three-way valve 53 opens the sewage channel;

[0073] S4. The indoor unit fan 23 is turned off, and the evaporator 22 begins to condense and defrost to perform self-cleaning of the evaporator 22, producing clean wastewater.

[0074] S5. Wastewater after cleaning evaporator 22 flows into wastewater area 42 of water storage box 4 through wastewater inlet pipe 52, and then into oil cup through overflow outlet 44.

[0075] S6, Three-way valve 53 is fully closed, both the clean water channel and the sewage channel are closed;

[0076] S7. The indoor unit fan 23 starts at the lowest speed, the evaporator 22 produces condensate, and water begins to be stored in the indoor unit drip tray 24.

[0077] S8. Determine whether the water level in the indoor unit's water tray 24 has reached the washable water level.

[0078] If so, the cooling system is turned off, and the indoor unit fan 23 continues to run at low speed. Then proceed to step S9.

[0079] If not, return to step S7;

[0080] S9. The indoor unit fan 23 continues to run at the lowest speed to clean the impeller 232 of the indoor unit fan 23.

[0081] After cleaning of S10 and indoor unit fan 23 impeller 232, open the sewage channel with three-way valve 53.

[0082] S11. Wastewater after cleaning the indoor unit impeller 232 flows into the wastewater area 42 of the water storage box 4 through the wastewater inlet pipe 52, and then flows into the oil cup through the overflow outlet 44.

[0083] S12. Prompt the user to pour oil into the cup.

[0084] In this control method, before detecting whether the water level in the indoor unit's water tray 24 has reached the cleaning water level, the indoor unit's fan 23 runs at its lowest speed, and the evaporator 22 produces condensate. The indoor unit's fan 23 always maintains its lowest speed until the impeller of the indoor unit's fan 23 is cleaned.

[0085] like Figure 8 As shown, when the system activates the evaporator self-cleaning and indoor unit impeller self-cleaning functions, another control method for the condensate treatment system of this refrigeration range hood includes the following steps:

[0086] S1, Power on;

[0087] S2, activate evaporator 22 self-cleaning;

[0088] S3, Three-way valve 53 opens the sewage channel;

[0089] S4. The indoor unit fan 23 is turned off, and the evaporator 22 begins to condense and defrost to perform self-cleaning of the evaporator 22, producing clean wastewater.

[0090] S5. Wastewater after cleaning evaporator 22 flows into wastewater area 42 of water storage box 4 through wastewater inlet pipe 52, and then into oil cup through overflow outlet 44.

[0091] S6, Three-way valve 53 is fully closed, both the clean water channel and the sewage channel are closed;

[0092] S7. The indoor unit fan 23 is turned off, and the evaporator 22 begins to condense and defrost, producing condensate water, which begins to accumulate in the indoor unit drip tray 24.

[0093] S8. Determine whether the water level in the indoor unit's water tray 24 has reached the washable water level.

[0094] If so, shut down the cooling system and proceed to step S9;

[0095] If not, return to step S7;

[0096] S9. The indoor unit fan 23 is turned on and runs at the lowest speed to clean the impeller 232 of the indoor unit fan 23.

[0097] After cleaning of S10 and indoor unit fan 23 impeller 232, open the sewage channel with three-way valve 53.

[0098] S11. Wastewater after cleaning the indoor unit impeller 232 flows into the wastewater area 42 of the water storage box 4 through the wastewater inlet pipe 52, and then flows into the oil cup through the overflow outlet 44.

[0099] S12. Prompt the user to pour oil into the cup.

[0100] In this control method, before detecting whether the water level in the indoor unit's water tray 24 has reached the cleaning water level, the indoor unit's fan 23 is turned off, and the evaporator 22 begins to condense and defrost to produce condensate. The indoor unit's fan 23 only starts to run at its lowest speed after the impeller of the indoor unit's fan 23 is cleaned.

[0101] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A condensate treatment system for a refrigerated range hood, comprising a compressor (1), an indoor unit module (2), an outdoor unit module (3), and a water storage box (4), wherein the indoor unit module (2) comprises an evaporator (22) and an indoor unit fan (23), the indoor unit fan (23) having a volute (231) and an impeller (232) installed inside the volute (231), characterized in that: The evaporator (22) is provided with an indoor unit water receiving tray (24) below it. The bottom of the indoor unit water receiving tray (24) has a drain outlet (241). The bottom of the volute (231) has a water passage hole (233). The volute (231) is connected to the indoor unit water receiving tray (24) through the water passage hole (233). It also includes a clean water inlet pipe (51), a sewage inlet pipe (52), and a three-way valve (53). The inlet of the three-way valve is connected to the drain outlet (241). The three-way valve (53) is connected to the first outlet of the clean water inlet pipe (51) and the second outlet of the three-way valve (53) is connected to the inlet of the sewage inlet pipe (52). The water storage box (4) is divided into a clean water area (41) and a sewage area (42). The outlet of the clean water inlet pipe (51) is connected to the clean water area (41) and the outlet of the sewage inlet pipe (52) is connected to the sewage area (42).

2. The condensate treatment system of the refrigerated range hood according to claim 1, characterized in that: A water level sensor (25) is installed in the water receiving pan (24) of the indoor unit.

3. The condensate treatment system of the refrigerated range hood according to claim 1, characterized in that: The drain outlet (241) is lower than the water passage hole (233).

4. The condensate treatment system of the refrigerated range hood according to claim 1, characterized in that: The indoor unit water receiving tray (24) is sealed to the volute (231), or the indoor unit water receiving tray (24) and the volute (231) are an integral part.

5. The condensate treatment system of the refrigerated range hood according to claim 1, characterized in that: The clean water area (41) and the sewage area (42) are separated by a dam (43). The sewage area (42) is provided with an overflow outlet (44). The height of the dam (43) is higher than the height of the overflow outlet (44), and the height of the dam (43) is lower than the edge height of the water storage box (4).

6. The condensate treatment system of the refrigerated range hood according to claim 1, characterized in that: The indoor unit module (2) includes an indoor unit housing (21), the evaporator (22) is installed inside the indoor unit housing (21), the indoor unit water receiving tray (24) is installed at the bottom of the indoor unit housing (21), and the indoor unit fan (23) is installed on the side of the indoor unit housing (21).

7. The condensate treatment system of the refrigerated range hood according to claim 1, characterized in that: The outdoor unit module (3) includes an outdoor unit housing (31) and a condenser (32) and a cooling fan (33) installed on the outdoor unit housing (31). The bottom of the outdoor unit housing (31) is provided with a condensate return port (311), and also includes a water outlet pipe (54) and a water return pipe (55). The condensate in the clean water area is transported to the condenser (32) through the water outlet pipe (54), and the condensate flowing out from the condensate return port (311) flows into the water storage box (4) through the water return pipe (55).

8. The condensate treatment system of the refrigerated range hood according to claim 7, characterized in that: A water pump (56) is installed inside the water storage box (4). A liquid distributor (6) is installed on the top of the condenser (32) to distribute liquid to the condenser (32). The outlet of the water outlet pipe (54) is connected to the inlet of the liquid distributor (6). The condensate in the clean water area is transported to the condenser (32) through the water pump (56), the water outlet pipe (54) and the liquid distributor.

9. A control method for a condensate treatment system of a refrigerated range hood, characterized in that... Includes the following steps: S1, Power on; S2. Turn on the evaporator (22) self-cleaning function; S3, the three-way valve (53) opens the sewage channel; S4. The indoor unit fan (23) is turned off, and the evaporator (22) begins to condense and defrost to perform self-cleaning of the evaporator (22), producing clean wastewater. S5. Wastewater after cleaning the evaporator (22) flows into the wastewater area (42) of the water storage box (4) through the wastewater inlet pipe (52), and then flows into the oil cup through the overflow outlet (44). S6, the three-way valve (53) is fully closed, and both the clean water channel and the sewage channel are closed; S7. The indoor unit fan (23) starts at the lowest speed, the evaporator (22) produces condensate, and water begins to be stored in the indoor unit drip tray (24). S8. Determine whether the water level in the indoor unit's water tray (24) has reached the washable water level; If so, the refrigeration system is shut down, the indoor unit fan (23) continues to run at low speed, and then proceed to step S9; If not, return to step S7; S9. The indoor unit fan (23) continues to run at the lowest speed to clean the impeller (232) of the indoor unit fan (23); S10. After the impeller (232) of the indoor unit fan (23) is cleaned, the three-way valve (53) opens the sewage channel; S11. The wastewater after cleaning the indoor unit impeller (232) flows into the wastewater area (42) of the water storage box (4) through the wastewater inlet pipe (52), and then flows into the oil cup through the overflow outlet (44). S12. Prompt the user to pour oil into the cup.

10. A control method for a condensate treatment system of a refrigerated range hood, characterized in that... Includes the following steps: S1, Power on; S2. Turn on the evaporator (22) self-cleaning function; S3, the three-way valve (53) opens the sewage channel; S4. The indoor unit fan (23) is turned off, and the evaporator (22) begins to condense and defrost to perform self-cleaning of the evaporator (22), producing clean wastewater. S5. Wastewater after cleaning the evaporator (22) flows into the wastewater area (42) of the water storage box (4) through the wastewater inlet pipe (52), and then flows into the oil cup through the overflow outlet (44). S6, the three-way valve (53) is fully closed, and both the clean water channel and the sewage channel are closed; S7. The indoor unit fan (23) is turned off, the evaporator (22) begins to condense and defrost to produce condensate water, and water begins to accumulate in the indoor unit drip tray (24); S8. Determine whether the water level in the indoor unit's water tray (24) has reached the washable water level; If so, shut down the cooling system and proceed to step S9; If not, return to step S7; S9. The indoor unit fan (23) is turned on and runs at the lowest speed to clean the impeller (232) of the indoor unit fan (23); S10. After the impeller (232) of the indoor unit fan (23) is cleaned, the three-way valve (53) opens the sewage channel; S11. The wastewater after cleaning the indoor unit impeller (232) flows into the wastewater area (42) of the water storage box (4) through the wastewater inlet pipe (52), and then flows into the oil cup through the overflow outlet (44). S12. Prompt the user to pour oil into the cup.

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