Drainage device, portable air conditioner and drainage method

Abstract

The invention discloses a drainage device, a portable air conditioner and a drainage method, and relates to the technical field of portable air conditioners, the drainage device comprises a first water pan, a second water pan and a circulating mechanism, the first water pan is provided with a first water outlet and a second water outlet, and therefore condensate water of the first water pan can drip onto a condenser through a first drainage port, and the second water outlet is provided with a second water outlet; the heat dissipation effect of the condenser can be improved. Condensate water can be discharged into a water storage tank of the circulation mechanism from a second water outlet, the condensate water can be sprayed on the condenser through a water pump, the condensate water on the condenser can be further evenly distributed, evaporation of the condensate water can be accelerated, accumulated water is reduced, the frequency of water pouring operation is reduced, and the use experience is improved. The drainage method is applied to the portable air conditioner and comprises the steps of detecting the temperature and humidity of outside air, controlling opening and closing of the first water outlet and starting and stopping of the water pump, and achieving flexible drainage and cooling functions, so that the good refrigeration effect and the good water evaporation effect are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of portable air conditioners, and particularly to a drainage device, a portable air conditioner and a drainage method. Background Art

[0002] In the related art, in order to meet the requirements of lightweight and compact mobile use for current small portable air conditioner products, a highly integrated box structure is generally adopted. The internal space of the compact body is limited, and it is difficult to increase the air flow rate, resulting in difficulty in further improving the heat exchange efficiency of the condenser and the evaporator, and thus the refrigeration effect of the portable air conditioner is limited. On the other hand, since the portable air conditioner can be moved freely, most users do not connect the drain pipe. After long-term operation, a large amount of condensed water is stored in the body, and users need to frequently pour water, resulting in poor user experience. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a drainage device, a portable air conditioner and a drainage method, which can improve the heat exchange efficiency and reduce the water pouring operation.

[0004] A drainage device according to an embodiment of the first aspect of the present invention includes: A first water receiving tray and a second water receiving tray. An evaporator is installed on the first water receiving tray, and a condenser is installed on the second water receiving tray. The first water receiving tray is installed on top of the condenser. The first water receiving tray is provided with a water receiving cavity, and the bottom of the water receiving cavity is provided with a first water outlet and a second water outlet. The first water outlet extends along the width direction of the first water receiving tray and is located on top of the condenser, and condensed water can drip into the condenser. The second water outlet is located on one side of the first water outlet; A circulation mechanism, including a water storage tank, a water pump and a spray pipe. The water pump is installed in the water storage tank, the water storage tank is installed on the second water receiving tray, and the spray pipe is fixed to the bottom of the first water receiving tray. Condensed water can be discharged from the second water outlet to the water storage tank, and the water pump can extract the condensed water and spray the condensed water on the condenser through the spray pipe.

[0005] A drainage device according to an embodiment of the present invention has at least the following beneficial effects: This embodiment is provided with a first water receiving tray, a second water receiving tray and a circulation mechanism. The first water receiving tray is provided with a first water outlet and a second water outlet. Thus, the condensed water in the first water receiving tray can drip onto the condenser through the first drain outlet, which can improve the heat dissipation effect of the condenser and is beneficial to improving the refrigeration effect. At the same time, the condensed water can be discharged from the second water outlet to the water storage tank of the circulation mechanism, and the water storage tank is provided with a water pump. Through the water pump, the condensed water can be sprayed on the condenser, which can further make the condensed water on the condenser evenly distributed, further improve the heat dissipation effect, and can accelerate the evaporation of the condensed water, reduce water accumulation, thereby reducing the frequency of the water pouring operation and being beneficial to improving the user experience.

[0006] According to an embodiment of the first aspect of the present invention, the bottom of the water receiving cavity has a concave water collecting trough, the water collecting trough has two V-shaped guiding surfaces, and the first water outlet is located between the two guiding surfaces.

[0007] According to an embodiment of the first aspect of the present invention, the circulation mechanism further includes a sealing plate, which is movably connected to the bottom outer wall of the first water receiving tray facing the condenser, and the first water outlet can be opened and closed when the sealing plate moves.

[0008] According to an embodiment of the first aspect of the present invention, the bottom of the water receiving cavity has a recessed water collecting trough, the second water outlet is located on the side wall of the water collecting trough, and the first water receiving tray is provided with a drainage channel, and the second water outlet is located at the end of the drainage channel.

[0009] According to an embodiment of the first aspect of the present invention, a fan is provided on a side of the condenser facing the outer periphery of the second water receiving tray, and a baffle covering the outer side wall of the condenser is provided on the outer periphery of the fan.

[0010] According to an embodiment of the first aspect of the present invention, the nozzle is arranged on a side of the condenser away from the fan, and the nozzle is provided with a plurality of branches, which are bent and have their ends facing the condenser.

[0011] According to an embodiment of the first aspect of the present invention, an overflow hole is provided on the outer periphery of the water storage tank, and the overflow hole can allow condensed water to overflow from the water storage tank and be discharged into the second water receiving tray.

[0012] According to an embodiment of the first aspect of the present invention, the circulation mechanism further includes a humidity sensor and a temperature sensor capable of detecting the humidity and temperature of the external air.

[0013] According to an embodiment of the second aspect of the present invention, there is provided a portable air conditioner, comprising the above-mentioned drainage device, including: The box body is provided with a first air inlet and a first air outlet, the first air inlet is provided on both sides of the first air outlet, and the fan is provided on the side of the condenser facing the first air outlet.

[0014] The portable air conditioner according to the second embodiment of the present invention has at least the following beneficial effects: The portable air conditioner of this embodiment includes a box body, which is provided with a first air inlet and a first air outlet. A fan is arranged on one side of the condenser facing the first air outlet, which can realize the convective heat exchange of the condenser to ensure that the condenser dissipates heat in time and ensure that the portable air conditioner has a good refrigeration function. The drainage device of the portable air conditioner includes a first water receiving tray, a second water receiving tray and a circulation mechanism. The first water outlet of the first water receiving tray is arranged at the top of the condenser, and the condensed water can drip onto the condenser to improve the heat dissipation effect of the condenser. At the same time, the condensed water can be discharged from the second water outlet to the water storage tank of the circulation mechanism, and the water pump can spray the condensed water on the condenser, which can further make the condensed water on the condenser evenly distributed, further improve the heat dissipation effect, and can accelerate the evaporation of the condensed water, reduce water accumulation, thereby reducing the frequency of pouring water operations, which is beneficial to improving the user experience.

[0015] According to an embodiment of the third aspect of the present invention, a drainage method is provided, which is applied to the above-mentioned portable air conditioner, and includes the following steps: Measure the temperature value T and humidity value H of the external air, judge whether the temperature value T is greater than the temperature threshold T0, and judge whether the humidity value H is greater than the humidity threshold H0; When the temperature value T is not greater than the temperature threshold T0 and the humidity value H is not greater than the humidity threshold H0, open the first water outlet and close the water pump; When the temperature value T is not greater than the temperature threshold T0 and the humidity value H is greater than the humidity threshold H0, close the first water outlet, start the water pump, and spray the condensed water on the condenser; When the temperature value T is greater than the temperature threshold T0 and the humidity value H is not greater than the humidity threshold H0, close the first water outlet, start the water pump, and spray the condensed water on the condenser; When the temperature value T is greater than the temperature threshold T0 and the humidity value H is greater than the humidity threshold H0, open the first water outlet, start the water pump, and spray the condensed water on the condenser.

[0016] The drainage method according to the embodiment of the third aspect of the present invention has at least the following beneficial effects: In this embodiment, by detecting that the external temperature value T and humidity value H are respectively compared with the preset temperature threshold T0 and humidity threshold H0, when the temperature value T is not greater than the temperature threshold T0 and at the same time the humidity value H is not greater than the humidity threshold H0, since the external temperature and humidity are not high, the water pump is turned off and the first water outlet is opened. Through the first water outlet, condensed water can drip onto the condenser and a part of the condensed water can evaporate. The condenser can have a good heat dissipation effect; when the temperature value T is not greater than the temperature threshold T0 and at the same time the humidity value H is greater than the humidity threshold H0, or when the temperature value T is greater than the temperature threshold T0 and at the same time the humidity value H is greater than the humidity threshold H0, at this time the water pump is started and the first water outlet is closed. At this time, the amount of condensed water will increase. Therefore, by starting the water pump to spray the condensed water on the condenser, the contact uniformity between the water and the condenser can be increased, which helps the evaporation of the condensed water and the full utilization of the cold quantity of the condensed water, further improving the refrigeration effect and enhancing the cooling and dehumidification effects of the portable air conditioner; when the temperature value T is greater than the temperature threshold T0 and at the same time the humidity value H is greater than the humidity threshold H0, that is, in a high-temperature and high-humidity environment, by turning on the water pump to spray water and opening the first water outlet to drain water, the condenser is fully contacted with the condensed water, the cold quantity of the condensed water is fully utilized and the evaporation efficiency of the condensed water is further improved, thereby further improving the refrigeration effect.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments, where: Figure 1 is an axonometric view of a drainage device in an embodiment of the present invention; Figure 2 is a first cross-sectional view of a drainage device in an embodiment of the present invention; Figure 3 is Figure 2 the enlarged view of A in Figure 4 is a second cross-sectional view of a drainage device in an embodiment of the present invention; Figure 5 is Figure 4 the enlarged view of B in Figure 6 is an axonometric view of a portable air conditioner in an embodiment of the present invention; Figure 7 is a cross-sectional view of a portable air conditioner in an embodiment of the present invention; Figure 8 is a flowchart of a drainage method in an embodiment of the present invention.

[0019] Reference numerals: Cabinet 100; First air inlet 101; Evaporator 102; Condenser 103; Fan 104; Baffle 105; First air outlet 106; Second air outlet 107; Second air inlet 108; Exhaust fan 109; First water receiving tray 110; Water receiving cavity 111; Water collecting trough 112; First water outlet 113; Second water outlet 114; Guide surface 115; Drainage channel 116; Second water receiving tray 120; Second liquid level gauge 121; Water storage tank 122; Overflow hole 123; Sealing plate 131; Spray pipe 132; Branch pipe 133; First heat exchange cavity 141; Second heat exchange cavity 142. Detailed implementation manners

[0020] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0021] In the description of the present invention, it should be understood that for the orientation description, such as up, down, front, back, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0022] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0024] Refer to Figure 1, A drainage device according to an embodiment of the first aspect of the present invention is applied to a portable air conditioner. It can be understood that the portable air conditioner is provided with a cabinet 100, and the drainage device is installed inside the cabinet 100. The drainage device includes a first water receiving tray 110, a second water receiving tray 120 and a circulation mechanism. An evaporator 102 is installed on the first water receiving tray 110, and a condenser 103 is installed on the second water receiving tray 120. The first water receiving tray 110 is installed on top of the condenser 103. Refer to Figure 6 , It can be understood that the side wall of the cabinet 100 has a first air inlet 101 and a first air outlet 106. The condenser 103 is located inside the cabinet 100 where the first air outlet 106 is provided, and a fan 104 is provided between the condenser 103 and the inner wall of the cabinet 100. When the fan 104 rotates, it can make the outside air enter the cabinet 100 from the first air inlet 101, pass through the condenser 103 and be discharged from the first air outlet 106, taking away the heat of the condenser 103.

[0025] Refer to Figure 2 and Figure 3 , It can be understood that the first water receiving tray 110 is provided with a water receiving cavity 111 arranged in a concave shape. A first water outlet 113 is provided at the bottom of the water receiving cavity 111. The bottom wall of the water receiving cavity 111 is inclined from the outer periphery of the water receiving cavity 111 towards the first water inlet, which is beneficial to gathering condensed water and discharging it. It can be understood that the condensed water discharged from the first water receiving tray 110 can fall into the second water receiving tray 120. It can be understood that the first water outlet 113 extends along the width direction of the first water receiving tray 110 and is located on top of the condenser 103, and the condensed water can drip into the condenser 103, realizing cooling the condenser 103 by using the cold quantity of the condensed water, which is beneficial to improving the heat dissipation effect and the refrigeration effect of the portable air conditioner. At the same time, it can increase the evaporation of the condensed water, reduce the accumulation of water in the cabinet 100, thereby reducing the frequency of pouring water operations, which is beneficial to improving the user experience.

[0026] Refer to Figure 6 and Figure 7, it can be understood that the box body 100 is also provided with an exhaust fan 109, a second air inlet 108 and a second air outlet 107. The exhaust fan 109 is installed in the first water receiving tray 110. The second air outlet 107 is located at the top of the box body 100. The position of the second air inlet 108 corresponds to that of the evaporator 102, so that the outside air can enter the box body 100 through the second air inlet 108 and contact the evaporator 102 to realize the refrigeration process, and the refrigerated air is discharged to the outside through the second air outlet 107. It can be understood that since the condensed water will evaporate to generate water vapor when contacting the condenser 103, in order to prevent the water vapor from returning to the evaporator 102 again, the first water receiving tray 110 divides the inner cavity of the box body 100 into a first heat exchange cavity 141 and a second heat exchange cavity 142. The first heat exchange cavity 141 is located above the second heat exchange cavity 142. The evaporator 102 is located in the first heat exchange cavity 141, and the condenser 103 is located in the second heat exchange cavity 142, so as to reduce the air circulation between the first heat exchange cavity 141 and the second heat exchange cavity 142 and ensure a good refrigeration effect.

[0027] Further, referring to Figure 2 and Figure 7 , the fan 104 is arranged between the condenser 103 and the inner wall of the box body 100 where the first air outlet 106 is provided. A baffle 105 covering the outer side wall of the condenser 103 is provided on the outer periphery of the fan 104. At the same time, along the length direction of the box body 100, the projected area of the first air outlet 106 is smaller than the projected area of the condenser 103. Therefore, the air in the second heat exchange cavity 142 is mainly discharged through the opening of the box body 100 where the fan 104 is provided under the guidance of the baffle 105, avoiding the outside air from entering the second heat exchange cavity 142 through the gap on the outer periphery of the fan 104 and causing the steam to flow back to the first heat exchange cavity 141.

[0028] It can be understood that the bottom of the water receiving cavity 111 has a sunken water collecting tank 112. The water collecting tank 112 has two guiding surfaces 115 arranged in a V shape. The first water outlet 113 is located between the two guiding surfaces 115. Through the guiding surfaces 115, the condensed water in the water receiving cavity 111 can be quickly gathered in the first water outlet 113, thereby improving the drainage efficiency and avoiding water accumulation. It can be understood that the first water outlet 113 extends along the width direction of the first water receiving tray 110, which can increase the coverage area of the first water outlet 113 on the condenser 103, thereby increasing the contact area between the condenser 103 and the condensed water, improving the uniformity of the arrangement of the condensed water on the condenser 103, and being beneficial to the heat dissipation of the condenser 103 and the evaporation of the condensed water.

[0029] Referring to Figure 3 , Figure 4 and Figure 5It can be understood that a second water outlet 114 is provided at the bottom of the water receiving cavity 111, and the second water outlet 114 is located on one side of the first water outlet 113 along the width direction of the first water receiving tray 110. At the same time, the first water receiving tray 110 has a drainage channel 116, and the drainage channel 116 extends along the width direction of the first water receiving tray 110. The second water outlet 114 is provided at the end of the drainage channel 116, so that the condensed water in the water collecting cavity can enter the second water outlet 114 and flow through the drainage channel 116 to realize the drainage function.

[0030] It can be understood that the circulation mechanism includes a water storage tank 122, a water pump (not shown in the figure), and a spray pipe 132. The water pump is installed in the water storage tank 122, the water storage tank 122 is installed on the second water receiving tray 120, the spray pipe 132 is fixed to the bottom of the first water receiving tray 110 and is located on the side of the condenser 103 facing away from the fan 104. The drainage channel 116 is communicated with the water storage tank 122, and the condensed water can be discharged from the second water outlet 114 through the drainage channel 116 to the water storage tank 122. The water pump can extract the condensed water and spray the condensed water on the condenser 103 through the spray pipe 132, which can increase the contact area between the condensed water and the condenser 103 while increasing the drainage efficiency of the condensed water, thereby increasing the heat dissipation efficiency of the condenser 103 and the evaporation efficiency of the condensed water.

[0031] It can be understood that the circulation mechanism is provided with a movable sealing plate 131. The sealing plate 131 is slidably connected to the bottom outer wall of the first water receiving tray 110 facing the condenser 103. The first water receiving tray 110 is provided with a driver (not shown in the figure) capable of driving the sealing plate 131 to move. The driver drives the sealing plate 131 to move by means of a motor and a gear-rack transmission. When the sealing plate 131 moves, it can open and close the first water outlet 113. Further, the spray pipe 132 extends along the width direction of the first water receiving tray 110, and the spray pipe 132 has a plurality of branch pipes 133 arranged at intervals along its length direction. The branch pipes 133 are bent and their ends face the condenser 103, and the ends of the branch pipes 133 are provided with atomizing ports (not shown in the figure), which can make the sprayed condensed water contact the surface of the condenser 103 in a larger range, thereby increasing the heat dissipation efficiency of the condenser 103 and the evaporation efficiency of the condensed water.

[0032] Further, an overflow hole 123 is provided on the outer periphery of the water storage tank 122. The overflow hole 123 is located at the upper part of the water storage tank 122 and can allow the condensed water to overflow from the water storage tank 122 and drain into the second water receiving tray 120. It can be understood that, on the one hand, the water storage tank 122 can hold a part of the condensed water, which can increase the total volume of the condensed water accommodated in the box body 100 and reduce the accumulation of the condensed water in the second water receiving tray 120, which is beneficial to reducing the operation frequency of the user pouring water. Further, a first liquid level gauge (not shown in the figure) is provided in the water storage tank 122, and a second liquid level gauge 121 is provided in the second water receiving tray 120. The liquid level gauge in the water storage tank 122 can detect the lowest liquid level value in the water storage tank 122. When the condensed water in the water storage tank 122 is lower than the lowest liquid level value, the water pump stops working.

[0033] It can be understood that the circulation mechanism further includes a controller, a humidity sensor and a temperature sensor. The controller is electrically connected to the humidity sensor, the temperature sensor, the water pump and the driver. The humidity sensor and the temperature sensor are arranged on the outer wall of the box body 100, so as to be able to detect the humidity and temperature of the external air.

[0034] Referring to Figure 6 , according to the embodiment of the second aspect of the present invention, a portable air conditioner is provided, including the above-mentioned drainage device. It can be understood that the portable air conditioner includes all the technical features of a drainage device, so the portable air conditioner at least includes all the beneficial effects of a drainage device.

[0035] Referring to Figure 8 , according to the embodiment of the third aspect of the present invention, a drainage method is provided, which is applied to a portable air conditioner and includes the following steps: First, when the portable air conditioner is running, the temperature value T and the humidity value H outside the box body 100 are respectively measured by the temperature sensor and the humidity sensor, and the controller receives the current temperature value T and humidity value H; and, it is judged whether the temperature value T is greater than the temperature threshold T0, and it is judged whether the humidity value H is greater than the humidity threshold H0. In this embodiment, the temperature threshold T0 satisfies: 26°C ≤ T0 ≤ 28°C, and the humidity threshold H0 satisfies: 50% ≤ H0 ≤ 55%.

[0036] When the temperature value T is not greater than the temperature threshold T0, and at the same time the humidity value H is not greater than the humidity threshold H0, that is: T < 26°C, and H < 50%, the controller opens the first water outlet 113 and closes the water pump. At this time, the condensed water in the first water receiving tray 110 is discharged to the condenser 103 through the first water outlet 113. Since the temperature and humidity of the external air are relatively low, less condensed water is generated during the operation of the portable air conditioner. Draining water through the first water outlet 113 can ensure that the condenser 103 is cooled and the evaporation of the condensed water is realized.

[0037] When the temperature value T is not greater than the temperature threshold T0, and at the same time the humidity value H is greater than the humidity threshold H0, that is, T < 26°C and H > 55%. Since the humidity in the environment is relatively high, a large amount of condensed water is generated during the refrigeration process. The amount of water discharged through the first water outlet 113 is large and it is difficult to fully contact the surface of the condenser 103. Therefore, the controller drives the sealing plate 131 to move and close the first water outlet 113, starts the water pump, sprays the condensed water onto the condenser 103. While draining the water, the condensed water can fully contact the condenser 103, so as to improve the heat dissipation effect of the condenser 103 and the evaporation effect of the condensed water. It can be understood that the first level gauge in the water storage tank 122 can detect the liquid level in the water storage tank 122. When the liquid level is lower than the preset value, the water pump stops running. At this time, the first water outlet 113 remains closed, and the condensed water can enter the water storage tank 122 through the second water outlet 114 and the drainage channel 116. When the liquid level in the water storage tank 122 is higher than the preset value, the water pump starts to achieve the spraying function, avoiding the water pump from idling.

[0038] When the temperature value T is greater than the temperature threshold T0, and at the same time the humidity value H is not greater than the humidity threshold H0, that is, T > 28°C and H < 50%. Since the temperature in the environment is relatively high, a large amount of condensed water is generated during the refrigeration process. The amount of water discharged through the first water outlet 113 is large and it is difficult to fully contact the surface of the condenser 103. Therefore, the controller drives the sealing plate 131 to move and close the first water outlet 113, starts the water pump, sprays the condensed water onto the condenser 103. While draining the water, the condensed water can fully contact the condenser 103, so as to improve the heat dissipation effect of the condenser 103 and the evaporation effect of the condensed water. It can be understood that the first level gauge in the water storage tank 122 can detect the liquid level in the water storage tank 122. When the liquid level is lower than the preset value, the water pump stops running. At this time, the first water outlet 113 remains closed, and the condensed water can enter the water storage tank 122 through the second water outlet 114 and the drainage channel 116. When the liquid level in the water storage tank 122 is higher than the preset value, the water pump starts to achieve the spraying function, avoiding the water pump from idling.

[0039] When the temperature value T is greater than the temperature threshold T0, and at the same time the humidity value H is greater than the humidity threshold H0, that is, T > 28°C and H > 55%. The temperature and humidity in the environment are relatively high, and a large amount of condensed water is generated during the refrigeration process. To avoid water accumulation or even overflow in the first water receiving tray 110, at this time, the first water outlet 113 is opened, the water pump is started, and the condensed water is sprayed onto the condenser 103. The first water outlet 113 and the second water outlet 114 both achieve the drainage function at the same time. The condensed water can contact the condenser 103 in the form of dripping and spraying, enabling the condensed water to fully contact the surface of the condenser 103, making full use of the cold quantity of the condensed water, thereby producing a good refrigeration effect and condensed water evaporation effect.

[0040] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the relevant art.

Claims

1. A drainage device, characterized in that, include: a first water receiving pan and a second water receiving pan, wherein an evaporator is mounted on the first water receiving pan, and a condenser is mounted on the second water receiving pan, the first water receiving pan being mounted on top of the condenser, the first water receiving pan being provided with a water receiving chamber, a first water outlet and a second water outlet being provided at the bottom of the water receiving chamber, the first water outlet extending along the width direction of the first water receiving pan and being located at the top of the condenser, so that condensed water can drip into the condenser, and the second water outlet being located on one side of the first water outlet; The circulation mechanism includes a water tank, a water pump and a nozzle. The water pump is installed in the water tank, the water tank is installed on the second water receiving tray, and the nozzle is fixed to the bottom of the first water receiving tray. The condensed water can be discharged from the second water outlet to the water tank. The water pump can extract the condensed water and spray the condensed water on the condenser through the nozzle.

2. The drainage device according to claim 1, characterized in that, The bottom of the water receiving cavity is provided with a concave water collecting trough, the water collecting trough has two V-shaped guiding surfaces, and the first water outlet is located between the two guiding surfaces.

3. A drainage device according to claim 1, characterized in that, The circulation mechanism further includes a sealing plate, which is movably connected to the bottom outer wall of the first water receiving tray facing the condenser, and the first water outlet can be opened and closed when the sealing plate moves.

4. A drainage device according to claim 1, characterized in that, The bottom of the water receiving cavity is provided with a concave water collecting trough, the second water outlet is located on the side wall of the water collecting trough, and the first water receiving tray is provided with a drainage channel, the second water outlet is located at the end of the drainage channel.

5. A drainage device according to claim 1, characterized in that, A fan is provided on one side of the condenser facing the outer periphery of the second water receiving tray, and a baffle covering the outer side wall of the condenser is provided on the outer periphery of the fan.

6. The drainage device according to claim 5, characterized in that, The nozzle is arranged on a side of the condenser away from the fan, and the nozzle is provided with a plurality of branch pipes. The branch pipes are bent and the ends thereof face the condenser.

7. A drainage device according to claim 1, characterized in that, An overflow hole is provided on the outer periphery of the water storage tank, and the overflow hole can allow the condensed water to overflow from the water storage tank and be discharged into the second water receiving tray.

8. A drainage device according to claim 1, characterized in that, The circulation mechanism also includes a humidity sensor and a temperature sensor, which can detect the humidity and temperature of the external air.

9. Portable air conditioner, characterized in that, A drainage device according to any one of claims 1 to 8, wherein the drainage device is provided with a fan and a condenser, comprising: The box body is provided with a first air inlet and a first air outlet, the first air inlet is provided on both sides of the first air outlet, and the fan is provided on the side of the condenser facing the first air outlet.

10. A drainage method, characterized in that, The portable air conditioner as claimed in claim 9, comprising a drainage device and a condenser, wherein the drainage device comprises a water pump and a first water receiving tray, wherein the first water receiving tray has a first water outlet, comprising the following steps: Measuring the temperature value T and humidity value H of the outside air, and determining whether the temperature value T is greater than the temperature threshold T0, and determining whether the humidity value H is greater than the humidity threshold H0; When the temperature value T is not greater than the temperature threshold T0 and the humidity value H is not greater than the humidity threshold H0, the first water outlet is opened and the water pump is turned off; When the temperature value T is not greater than the temperature threshold T0, and at the same time the humidity value H is greater than the humidity threshold H0, close the first water outlet, start the water pump, and spray the condensed water onto the condenser; When the temperature value T is greater than the temperature threshold T0, and at the same time the humidity value H is not greater than the humidity threshold H0, close the first water outlet, start the water pump, and spray the condensed water onto the condenser; When the temperature value T is greater than the temperature threshold T0, and at the same time the humidity value H is greater than the humidity threshold H0, open the first water outlet, start the water pump, and spray the condensed water onto the condenser; The temperature threshold T0 satisfies: 26°C ≤ T0 ≤ 28°C, and the humidity threshold H0 satisfies: 50% ≤ H0 ≤ 55%.

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