A mobile air conditioner circulating type water pan

CN224887328UActive Publication Date: 2026-10-23NINGBO BAOGONG ELECTRICAL APPLIANCE CO LTD
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Patent Information

Application Number
CN202621399687.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2026-09-07
Publication Date
2026-10-23
Estimated Expiration
2036-09-07

AI Technical Summary

Technical Problem

被甩至冷凝器上的水在完成热交换后,大部分未蒸发的水滴落回打水区,将冷凝器散发的热量带回,导致打水区内的水温逐渐升高,削弱了冷却介质的吸热能力,直接影响冷凝器的换热效率

Benefits of technology

[0015]本实用新型移动空调循环式接水盘,通过设置循环流道,打水轮在转动时不仅承担甩水冷却功能,其旋转产生的推力使打水区内的水具有从第一端向第二端流动的趋势,通过在第一端设置进水口,第二端设置出水口,并配合循环流道与连接流道汇流,将打水轮的机械能转化为水流循环的动力,无需额外增设水泵,即可使打水区内的水进行定向流动,有效解决了传统结构中水体静止导致的局部热量积聚问题,提高了对冷凝器的冷却效果;本实用新型移动空调循环式接水盘,结构简单紧凑、能使打水区内的冷凝水循环流动、有效降低打水区水温,冷却效果好,确保移动空调整体的运行可靠性及稳定性。

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Abstract

The utility model provides a kind of mobile air conditioner circulating type water pan, it is related to mobile air conditioner field, including disc body, water collecting area and water hitting area are equipped on disc body, water collecting area is used to receive condensate, water hitting area is located at the lower end of condenser, water hitting area is strip and has first end and second end, water hitting wheel for hitting water in water hitting area to condenser is equipped in water hitting area, water hitting wheel makes water in water hitting area have the tendency of flowing from first end to second end, the first end of water hitting area is equipped with water inlet, the second end of water hitting area is equipped with water outlet, water collecting area is communicated with water inlet by connecting flow channel and can drain condensate to water hitting area, water outlet is equipped with circulating flow channel, circulating flow channel and connecting flow channel confluence and communicate water inlet, and form circulation;Connecting flow channel is equipped with overflow port.The utility model mobile air conditioner circulating type water pan, structure is simple and compact, can make condensate in water hitting area circulating flow, effectively reduce water temperature in water hitting area, and cooling effect is good.
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Description

Technical Field

[0001] This utility model relates to the field of portable air conditioners, and in particular to a portable air conditioner circulating water receiving tray. Background Technology

[0002] Existing portable air conditioners have a drip tray inside to collect condensate generated during the cooling process. To improve the heat exchange efficiency of the condenser, a water-spraying zone is set up inside the drip tray. A water-spraying wheel throws the condensate in the water-spraying zone onto the condenser fins above it, using the heat absorption of water evaporation to enhance the condenser's heat dissipation effect.

[0003] However, traditional water collection tray structures have several shortcomings in practical use. First, the water in the water-collecting zone is mainly drawn in and thrown out by the water wheel, lacking effective circulation and remaining essentially stagnant. After heat exchange, most of the unevaporated water droplets fall back into the water-collecting zone, carrying back the heat dissipated by the condenser. This causes the water temperature in the water-collecting zone to gradually rise, weakening the heat absorption capacity of the cooling medium and directly affecting the heat exchange efficiency of the condenser. Second, the water collection zone and the water-collecting zone are usually only simply connected. The low-temperature condensate flowing in from the water collection zone and the high-temperature water returning from the water-collecting zone cannot mix sufficiently, easily forming temperature stratification. The low-temperature water may be discharged through the overflow port before fully exerting its cooling effect, resulting in wasted cooling capacity. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a portable air conditioner circulating water tray with a simple and compact structure that enables water circulation in the water dispensing area, fully mixes hot and cold water, and has a good water dispensing effect.

[0005] This utility model provides a portable air conditioner circulating water receiving tray, including a tray body. The tray body has a water collection area and a water dispensing area. The water collection area is located at the lower end of the evaporator and is used to receive condensate. The water dispensing area is located at the lower end of the condenser and is strip-shaped with a first end and a second end. A water dispensing wheel is provided in the water dispensing area to dispense water towards the condenser. The water dispensing wheel causes the water in the water dispensing area to flow from the first end to the second end. The first end of the water dispensing area has a water inlet, and the second end of the water dispensing area has a water inlet. The system includes an outlet, a circulation channel between the inlet and the outlet, and a circulation path formed between the water pumping area, the outlet, the circulation channel, and the inlet. A connecting channel is provided between the water collection area and the circulation channel. The outlet end of the connecting channel is close to the outlet and faces the inlet, allowing the water discharged from the connecting channel and the water discharged from the outlet to merge and enter the circulation channel, then enter the water pumping area through the inlet and circulate. An overflow outlet is provided in the connecting channel.

[0006] Furthermore, the bottom surface of the connecting channel is inclined from the inlet end to the outlet end, the overflow port is located at the inlet end of the connecting channel, and the circulation channel is connected to the outlet end of the connecting channel.

[0007] Furthermore, a buffer zone is provided between the outlet end of the water collection area and the inlet end of the connecting channel, the overflow port is located on the bottom surface of the buffer zone, and a check valve is provided in the overflow port to allow water to flow through in one direction.

[0008] Furthermore, a buffer zone is provided between the outlet end of the water collection area and the inlet end of the connecting channel. The buffer zone is provided with a cover plate that can cover the entire overflow port. There is a gap between the bottom surface of the cover plate and the upper end of the overflow port, allowing water to pass through.

[0009] Furthermore, the cover plate includes a cover plate body, the two sides of which are bent downward to form support portions. The cover plate body has a strip groove corresponding to the protrusion in the buffer zone. The two sides of the strip groove extend downward to form snap-fit ​​portions. The snap-fit ​​portions can snap onto the protrusion and be fixed. There are two snap-fit ​​portions located on both sides of the overflow port. The lower ends of the snap-fit ​​portions and / or the support portions are in contact with the bottom surface of the buffer zone.

[0010] Furthermore, the water-pumping wheel is connected to the water-pumping motor on the disc via a main shaft, and the main shaft passes through the water inlet.

[0011] Furthermore, the water collection area, the water dispensing area, and the connecting flow channel are all strip-shaped and are respectively located at the three edges of the disc body.

[0012] Furthermore, the bottom surface of the connecting channel is provided with a strip-shaped protrusion along its length, which divides the connecting channel into a first sub-channel and a second sub-channel that are parallel to each other. The inlet end of the first sub-channel faces and is connected to the outlet end of the water collection area. The side wall of the inlet end of the second sub-channel is provided with a bypass water outlet that is connected to the first sub-channel. The outlet ends of both the first sub-channel and the second sub-channel are connected to the circulation channel, and the outlet end of the first sub-channel is located on the side away from the water outlet.

[0013] Furthermore, the circulation channel is strip-shaped and parallel to the length direction of the water-spraying area. The end of the strip-shaped protrusion extends into the circulation channel to form a second protruding section. The second protruding section is located upstream of the water outlet, and the outlet directions of the first sub-channel and the second sub-channel are parallel to the length direction of the circulation channel.

[0014] Furthermore, a second strip-shaped protrusion is provided along the length direction within the water-spraying area, and the second strip-shaped protrusion is located between the second end of the water-spraying area and the water-spraying wheel.

[0015] This utility model features a circulating water tray for portable air conditioners. By incorporating a circulating flow channel, the water impeller, while rotating, not only performs the function of discharging water for cooling, but the thrust generated by its rotation also causes the water in the water-discharging area to flow from the first end to the second end. With an inlet at the first end and an outlet at the second end, and by merging the circulating flow channel with the connecting channel, the mechanical energy of the water impeller is converted into the power for water circulation. This eliminates the need for an additional water pump, enabling directional water flow within the water-discharging area. This effectively solves the problem of localized heat accumulation caused by stagnant water in traditional structures, improving the cooling effect on the condenser. This portable air conditioner circulating water tray has a simple and compact structure, allows for the circulation of condensate within the water-discharging area, effectively reduces the water temperature in the water-discharging area, provides excellent cooling, and ensures the overall reliability and stability of the portable air conditioner. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of the mobile air conditioner circulating water receiving tray of this utility model; Figure 2 This is a schematic diagram of the structure of the mobile air conditioner circulating water receiving tray of this utility model; Figure 3 This is a schematic diagram of the structure of the mobile air conditioner circulating water receiving tray of this utility model; Figure 4 for Figure 3 Enlarged view of section A in the middle; Figure 5 for Figure 3 Enlarged view of section B; Figure 6 This is a cross-sectional view of the mobile air conditioner circulating water receiving tray of this utility model; Figure 7 This is a cross-sectional view of the overflow port of the mobile air conditioner circulating water receiving tray of this utility model; Figure 8 This is a schematic diagram of the structure of the cover plate of the mobile air conditioner circulating water receiving tray of this utility model; Figure 9 This is a schematic diagram of the cover plate of the mobile air conditioner circulating water receiving tray of this utility model from another angle. Figure 10 This is a schematic diagram of the water flow path of the circulating water tray of the portable air conditioner of this utility model.

[0017] In the diagram: 1. Disc, 12. Overflow port, 14. Strip protrusion, 140. Bypass water inlet, 15. Second strip protrusion, 16. Drain outlet, 101. Water collection area, 102. Buffer zone, 103. Connecting flow channel, 1031. First sub-flow channel, 1032. Second sub-flow channel, 104. Circulation flow channel, 105. Water pumping area, 10a. Inlet, 10b. Outlet, 121. Annular boss, 122. Overflow pipe, 131. Protrusion, 141. Second protrusion section, 1011. Water outlet, 2. Cover plate, 21. Cover plate body, 22. Support part, 23. Reinforcing rib, 24. Snap-fit ​​part, 240. Strip groove, 3. Water pumping motor, 31. Main shaft, 32. Water pumping wheel, 4. Evaporator, 5. Condenser, 6. Check valve, 61. Strip groove. Detailed Implementation

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] See Figures 1-10 This utility model provides a portable air conditioner circulating water receiving tray, including a tray body 1. The tray body 1 has an overall rectangular structure and is provided with a water collection area 101 and a water spraying area 105. The water collection area 101 is located at the lower end of the evaporator 4 and is used to receive the condensate dripping from the evaporator 4. The water spraying area 105 is located at the lower end of the condenser 5. The water spraying area 105 is strip-shaped and has a first end and a second end, that is, the two ends of the strip-shaped water spraying area 105 are the first end and the second end, respectively. A water spraying wheel 32 is provided in the water spraying area 105. The water spraying wheel 32 is used to spray (throw) the water in the water spraying area 105 toward (throw toward) the condenser 5, thereby achieving the cooling of the condenser 5. When the water spraying wheel 32 rotates, the water in the water spraying area 105 tends to flow from the first end to the second end. A water inlet 10a is provided at the first end of the water spraying area 105, and a water outlet 10a is provided at the second end of the water spraying area 105. The outlet 10b is provided with a circulation channel 104 between the inlet 10a and the outlet 10b. The circulation channel 104 is located outside the water pumping area. The water pumping area 105, the outlet 10b, the circulation channel 104 and the inlet 10a form a circulation path, that is, a path that is connected end to end. A connecting channel 103 is provided between the water collection area 101 and the circulation channel 104. The outlet end of the connecting channel 103 is close to the outlet 10b, and the water discharge direction of the outlet end is towards the inlet 10a. This allows the water discharged from the connecting channel 103 and the water discharged from the outlet 10b to merge and enter the circulation channel 104, and then enter the water pumping area 105 through the inlet 10a to achieve circulation. At the same time, an overflow port 12 is provided in the connecting channel 103. The entire disc 1 is formed by injection molding, and each area is separated by partitions. The overall structure is an open structure at the top.

[0020] In this application, the water jet not only performs the function of splashing water for cooling when it rotates, but the thrust generated by its rotation also causes the water in the water jet area to tend to flow from the first end to the second end. By setting an inlet 10a at the first end and an outlet 10b at the second end, and cooperating with the circulation channel and the connecting channel to merge, the mechanical energy of the water jet is converted into the power of water circulation. Without the need for an additional water pump, the water in the water jet area can be directed to flow, effectively solving the problem of local heat accumulation caused by the stillness of the water in the traditional structure.

[0021] Meanwhile, the circulation channel can guide the relatively high-temperature water flowing out from the second end of the water pumping zone back to the water inlet, and mix it with the low-temperature condensate from the water collection zone. This forces the relatively high-temperature water flowing back to be cooled before entering the water pumping zone, ensuring that the water temperature entering the water pumping zone is always kept at a low level. Compared with the existing structure where high-temperature water is repeatedly thrown out and dripped in place, this application improves the heat dissipation effect of the condenser through heat neutralization.

[0022] In this embodiment, the water jet 32 ​​is connected to the water jet motor 3 on the disc body 1 via a main shaft 31. The main shaft 31 passes through the water inlet 10a, eliminating the need for additional holes to accommodate the main shaft. The structure is compact and easy to manufacture.

[0023] In this embodiment, the bottom surface of the connecting channel 103 is inclined from the inlet end to the outlet end, with an inclination angle of approximately 0.1-0.3 degrees. The overflow port 12 is located at the inlet end of the connecting channel 103, and the circulation channel 104 is connected to the outlet end of the connecting channel 103. The slight inclination angle utilizes gravity to form a natural hydraulic slope, ensuring that the condensate collected in the water collection area can flow smoothly and gently to the outlet end, effectively avoiding water accumulation or water level fluctuations at the inlet end. The overflow port is located at the inlet end, and the circulation return port is located at the outlet end, ensuring the water volume in the water pumping area and the circulation channel.

[0024] A buffer zone 102 is provided between the outlet end of the water collection area 101 and the inlet end of the connecting channel 103. An overflow port 12 is provided on the bottom surface of the buffer zone 102. The overflow port 12 includes a vertically arranged overflow pipe 122. The edge of the overflow pipe extends upward to form an annular protrusion 121. When the water level is higher than the annular protrusion 121, it enters the overflow pipe 122 to achieve overflow and thus control the water level.

[0025] A check valve 6 is provided inside the overflow port 12. This check valve 6 allows water to flow in one direction only, preventing air from the lower end of the disc from entering the upper end of the disc through the overflow port 12 and affecting normal overflow due to the negative pressure of the fan. In this embodiment, the check valve 6 is a rubber duckbill check valve. (See reference...) Figure 7It includes a cylindrical valve body made of rubber, with the lower end of the valve body closed in an arc shape. A strip slit 61 is provided at the closed end. When there is water in the valve body, the strip slit can be opened under gravity, allowing water to flow out. When affected by negative pressure, the strip slit closes, preventing air from the lower end from entering the upper end, thus ensuring normal overflow.

[0026] In another embodiment, a cover plate 2 that can cover the entire overflow port 12 can be provided in the buffer zone 102. The cover plate 2 is generally rectangular in structure, and there is a gap between the bottom surface of the cover plate 2 and the upper end of the overflow port to allow water to pass through. The cover plate 2 covers the overflow port. When condensate flows into the buffer zone from the water collection area, the cover plate can effectively buffer the direct impact of the water flow, and prevent the water flow from directly rushing into the overflow port to form vortices or turbulent flow. It can make the water flow more smoothly into the overflow port through the gap, while reducing water flow noise and improving the user experience.

[0027] The check valve and cover plate 2 mentioned above can be installed individually or simultaneously.

[0028] In this embodiment, the cover plate 2 includes a rectangular cover plate body 21. The two sides of the cover plate body 21 are bent downward to form support parts 22. A flow space is formed between the two support parts 22. A strip groove 240 is provided on the cover plate body 21, which corresponds to the protrusion 131 in the buffer zone 102. The two sides of the strip groove 240 extend downward to form a snap-fit ​​part 24. The snap-fit ​​part 24 can snap onto the protrusion 131, thereby fixing the cover plate 2. There are two snap-fit ​​parts 24, which are located on both sides of the overflow port 12. The lower end of the snap-fit ​​part 24 or the support part 22 contacts the bottom surface of the buffer zone 102 to provide support and control the gap distance between the bottom surface of the cover plate 2 and the overflow port. Multiple reinforcing ribs 23 are provided on the bottom surface of the cover plate body 21. The length direction of the reinforcing ribs is perpendicular to the length direction of the support part 22.

[0029] A buffer zone is set between the water collection area and the connecting channel to buffer the condensate dripping from the evaporator before it enters the connecting channel, effectively suppressing water flow fluctuations and ensuring the stability of subsequent overflow and circulating water supply. Simultaneously, impurities such as dust and lint that may be mixed in the water can naturally settle within the buffer zone, preventing them from entering the water pumping area and clogging the pumping wheel or condenser fins, thus improving reliability. The overflow port is located at the bottom of the buffer zone, at the very beginning of the entire water supply path. When there is excess condensate, it overflows first, retaining water in the circulation to ensure that the water pumping cooling effect is not affected. Furthermore, in this embodiment, the check valve utilizes its own elastic structure. Under the influence of water gravity, the strip-shaped slit naturally opens to drain water. When the portable air conditioner's fan generates negative pressure, the lower arc-shaped closed end of the valve body is pressurized and self-sealed, tightly closing the strip-shaped slit. This effectively prevents air from flowing back into the upper part of the plate through the overflow port, ensuring normal overflow drainage function and guaranteeing overall operational stability and reliability.

[0030] A water outlet 1011 is provided at the outlet end of the water collection area to allow water in the water collection area 101 to flow out to the buffer zone.

[0031] In this embodiment, a strip-shaped protrusion 14 is provided on the bottom surface of the connecting channel 103. The strip-shaped protrusion 14 is strip-shaped, and its length direction is parallel to the length direction of the connecting channel 103, that is, it is arranged along the length direction of the connecting channel 103, and divides the connecting channel 103 into a first sub-channel 1031 and a second sub-channel 1032 that are parallel to each other. The inlet end of the first sub-channel 1031 faces and connects to the outlet end of the water collection area 101, that is, the inlet end of the first sub-channel 1031 faces and connects to the water outlet 1011, and the inlet end of the second sub-channel 1032... The end wall is provided with a bypass inlet 140 communicating with the first sub-channel 1031. Water in the collection area is mainly transported through the first sub-channel 1031. When the water volume is excessive, the excess water at the inlet of the first sub-channel 1031 will enter the second sub-channel through the bypass inlet 140. The outlets of both the first sub-channel 1031 and the second sub-channel 1032 are connected to the circulation channel 104. The outlet of the first sub-channel 1031 is located on the side away from the outlet 10b, while the outlet of the second sub-channel 1032 is located on the side closer to the outlet 10b. By setting the strip-shaped protrusion 14, a flow guiding function is provided, so that the water flows along the guiding direction of the strip-shaped protrusion in the connecting channel, avoiding lateral turbulence in the channel, thereby reducing water flow resistance. At the same time, it avoids swaying during movement that causes the water flow to fluctuate in the channel.

[0032] Meanwhile, the strip protrusion 14 divides the connecting channel into a first sub-channel and a second sub-channel. The first sub-channel serves as the main channel for conveying condensate, and its outlet is located on the side away from the outlet 10b. This prevents condensate from directly entering the water pumping area and affecting water circulation, thus improving the overall stability and reliability of use.

[0033] In this embodiment, the water collection area 101, the water pumping area 105, and the connecting channel 103 are all strip-shaped and respectively located at the three edges of the disc body 1, forming an overall U-shaped structure; the circulation channel 104 is strip-shaped, and its length direction is parallel to the length direction of the water pumping area 105. The end of the strip-shaped protrusion 14 extends into the circulation channel 104 to form a second protrusion section 141, and the second protrusion section 141 is located upstream of the inlet 10a, that is, the second protrusion section 141 does not reach the outlet 10b. The outlet directions of the first sub-channel and the second sub-channel are parallel to the length direction of the circulation channel 104, so that the condensate flowing out of the first sub-channel and the water flowing out of the outlet 10b can be merged and then enter the inlet 10a.

[0034] A drain outlet 16 is provided at the first end of the water-spraying area 105. The drain outlet 16 is horizontally arranged, and its axis is parallel to the length direction of the water-spraying area 105. The bottom surface of the drain outlet is lower than or flush with the bottom surface of the water-spraying area 105. A sealing plug is detachably installed on the drain outlet 16.

[0035] In this embodiment, a second strip-shaped protrusion 15 is provided in the water-spraying area. The length direction of the second strip-shaped protrusion 15 is parallel to the length direction of the water-spraying area, and the second strip-shaped protrusion 15 is located between the second end of the water-spraying area and the water-spraying wheel. The second strip-shaped protrusion is located between the water outlet and the water-spraying wheel, which plays a role in guiding and rectifying the flow, eliminating possible turbulence or deflection, making the water flow in the water-spraying area more stable and orderly, reducing the flow resistance, and providing good hydraulic conditions for the entire water cycle.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A portable air conditioner circulating water receiving tray, characterized in that: The device includes a disc body with a water collection area and a water spraying area. The water collection area is located at the lower end of the evaporator and is used to receive condensate. The water spraying area is located at the lower end of the condenser and is strip-shaped with a first end and a second end. A water spraying wheel is provided within the water spraying area to spray water towards the condenser. The water spraying wheel causes the water in the water spraying area to flow from the first end to the second end. The first end of the water spraying area has a water inlet, and the second end has a water outlet. A circulation channel is provided between the inlet and the outlet, forming a circulation path between the water pumping area, the outlet, the circulation channel, and the inlet; a connecting channel is provided between the water collection area and the circulation channel, with the outlet end of the connecting channel close to the outlet and facing the inlet, allowing the water discharged from the connecting channel and the water discharged from the outlet to merge and enter the circulation channel, then enter the water pumping area through the inlet and circulate; an overflow port is provided in the connecting channel.

2. The portable air conditioner circulating water receiving tray as described in claim 1, characterized in that: The bottom surface of the connecting channel slopes from the inlet end to the outlet end, the overflow port is located at the inlet end of the connecting channel, and the circulation channel is connected to the outlet end of the connecting channel.

3. The portable air conditioner circulating water tray as described in claim 1, characterized in that: The water-spraying area is provided with a second strip-shaped protrusion along its length, and the second strip-shaped protrusion is located between the second end of the water-spraying area and the water-spraying wheel.

4. The portable air conditioner circulating water tray as described in claim 1, characterized in that: A buffer zone is provided between the outlet end of the water collection area and the inlet end of the connecting channel. The overflow port is located on the bottom surface of the buffer zone. A check valve is provided in the overflow port, which allows water to flow through in one direction.

5. The portable air conditioner circulating water tray as described in claim 1, characterized in that: A buffer zone is provided between the outlet end of the water collection area and the inlet end of the connecting channel. A cover plate that can cover the entire overflow port is provided in the buffer zone. There is a gap between the bottom surface of the cover plate and the upper end of the overflow port, which allows water to pass through.

6. The portable air conditioner circulating water receiving tray as described in claim 5, characterized in that: The cover plate includes a cover plate body, the two sides of which are bent downward to form a support portion. The cover plate body has a strip groove corresponding to the protrusion in the buffer zone. The two sides of the strip groove extend downward to form a snap-fit ​​portion. The snap-fit ​​portion can snap onto the protrusion and be fixed. There are two snap-fit ​​portions located on both sides of the overflow port. The lower ends of the snap-fit ​​portion and / or the support portion are in contact with the bottom surface of the buffer zone.

7. The portable air conditioner circulating water tray as described in claim 1, characterized in that: The water-pumping wheel is connected to the water-pumping motor on the disc via a main shaft, which passes through the water inlet.

8. The portable air conditioner circulating water tray as described in claim 1, characterized in that: The bottom surface of the connecting channel has a strip-shaped protrusion along its length, which divides the connecting channel into a first sub-channel and a second sub-channel that are parallel to each other. The inlet end of the first sub-channel faces and is connected to the outlet end of the water collection area. The side wall of the inlet end of the second sub-channel has a bypass port that is connected to the first sub-channel. The outlet ends of the first sub-channel and the second sub-channel are both connected to the circulation channel, and the outlet end of the first sub-channel is located on the side away from the outlet.

9. The portable air conditioner circulating water tray as described in claim 8, characterized in that: The circulation channel is strip-shaped and parallel to the length direction of the water-spraying area. The end of the strip-shaped protrusion extends into the circulation channel to form a second protruding section. The second protruding section is located upstream of the water outlet, and the outlet directions of the first sub-channel and the second sub-channel are parallel to the length direction of the circulation channel.