Air conditioner indoor unit and air conditioner having the same

Abstract

The application belongs to the technical field of air conditioners, and specifically provides an air conditioner indoor unit and an air conditioner with the same. The air conditioner indoor unit comprises a water receiving groove for receiving condensed water left on an evaporator of the air conditioner indoor unit, a sewage groove for receiving sewage flowing down from a filter screen of the air conditioner indoor unit, an air speed sensor for detecting a current air speed at an air inlet of the air conditioner indoor unit, a pump water system, and a controller. The pump water system is configured to be capable of spraying the condensed water in the water receiving groove onto the filter screen and capable of discharging the sewage in the sewage groove outside the air conditioner indoor unit. The controller is configured to control the pump water system to spray the condensed water in the water receiving groove onto the filter screen when the current air speed is less than a preset air speed. The air conditioner indoor unit of the application realizes automatic detection of the contamination degree of the filter screen and automatic cleaning of the filter screen when the filter screen is relatively dirty.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and specifically provides an air conditioner indoor unit and an air conditioner having the same. BACKGROUND

[0002] The existing air conditioner indoor unit is generally provided with a filter screen to filter dust, flocculation and other foreign matters in the air through the filter screen, so as to prevent the evaporator and other components in the air conditioner indoor unit from being contaminated. With the operation of the air conditioner indoor unit, the filter screen will become dirtier and dirtier, which not only affects the air outlet effect of the air conditioner indoor unit, but also easily causes the evaporator to be contaminated.

[0003] In order to overcome the above problems, some air conditioner indoor units regularly remind users to clean the filter screen. However, the operation is relatively cumbersome, and there are certain safety problems, and the user experience is poor. SUMMARY

[0004] The present application aims to provide a new air conditioner indoor unit to realize automatic detection and automatic cleaning of the pollution degree of the filter screen.

[0005] To achieve the above-mentioned purpose, the present application provides an air conditioner indoor unit in a first aspect, comprising:

[0006] A water receiving tank for receiving condensate water left from an evaporator of the air conditioner indoor unit;

[0007] A sewage tank for receiving sewage flowing down from a filter screen of the air conditioner indoor unit;

[0008] A pump water system configured to be capable of spraying the condensate water in the water receiving tank onto the filter screen and capable of discharging the sewage in the sewage tank outside the air conditioner indoor unit;

[0009] A wind speed sensor for detecting a current wind speed at an air inlet of the air conditioner indoor unit;

[0010] A controller configured to control the pump water system to spray the condensate water in the water receiving tank onto the filter screen when the current wind speed is less than a preset wind speed.

[0011] Optionally, the air conditioner indoor unit further comprises a first liquid level sensor for detecting a liquid level in the water receiving tank;

[0012] The step of controlling the pump water system to spray the condensate water in the water receiving tank onto the filter screen when the current wind speed is less than a preset wind speed comprises:

[0013] Detecting a state of the first liquid level sensor when the current wind speed is less than a preset wind speed;

[0014] controlling the pump water system to spray the condensed water in the water collecting tray onto the filter screen when the first liquid level sensor is triggered.

[0015] Optionally, the pump water system comprises a water pump, a nozzle for spraying the filter screen, an upstream control valve configured to communicate an inlet of the water pump with the water collecting tray or the sewage collecting tray, a downstream control valve configured to communicate an outlet of the water pump with the nozzle or the drainage member, and a drainage member.

[0016] The step of controlling the pump water system to spray the condensed water in the water collecting tray onto the filter screen comprises: controlling the upstream control valve to communicate the inlet of the water pump with the water collecting tray, controlling the downstream control valve to communicate the outlet of the water pump with the nozzle, and controlling the water pump to work.

[0017] Optionally, the air conditioner indoor unit further comprises a sewage liquid level sensor for detecting a liquid level in the sewage collecting tray.

[0018] The controller is further configured to, when it is detected that the sewage liquid level sensor is triggered, control the upstream control valve to communicate the inlet of the water pump with the sewage collecting tray, control the downstream control valve to communicate the outlet of the water pump with the drainage member, and control the water pump to work.

[0019] Optionally, the controller is further configured to, when the current air flow rate is greater than or equal to the preset air flow rate, control the upstream control valve to communicate the inlet of the water pump with the water collecting tray, control the downstream control valve to communicate the outlet of the water pump with the drainage member, and control the water pump to stop working.

[0020] Optionally, the air conditioner indoor unit further comprises a second liquid level sensor for detecting a liquid level in the water collecting tray, the liquid level detected by the second liquid level sensor being lower than the liquid level detected by the first liquid level sensor.

[0021] The controller is further configured to, when the current air flow rate is greater than or equal to the preset air flow rate, detect a state of the second liquid level sensor.

[0022] controlling the water pump to work when the second liquid level sensor is triggered.

[0023] Optionally, the upstream control valve comprises a first upstream inlet fluidly connected with the water collecting tray, a second upstream inlet fluidly connected with the sewage collecting tray, and an upstream outlet fluidly connected with the inlet of the water pump; and / or,

[0024] The downstream control valve includes a downstream inlet fluidly connected to an outlet of the water pump, a first downstream outlet fluidly connected to the drain member, and a second downstream outlet fluidly connected to the nozzle.

[0025] Optionally, each speed gear of the fan of the air conditioner indoor unit corresponds to a preset wind speed.

[0026] The controller is further configured to acquire the current speed gear of the fan while acquiring the current wind speed, and determine the current preset wind speed according to the current speed gear.

[0027] Optionally, the controller is further configured to acquire the current wind speed corresponding to each speed gear when the fan is first operated, and determine the preset wind speed corresponding to each speed gear according to the current wind speed.

[0028] The application provides an air conditioner in a second aspect, comprising an air conditioner outdoor unit and the air conditioner indoor unit of any one of the first aspect.

[0029] Based on the foregoing description, those skilled in the art can understand that, in the foregoing technical solutions of the application, the wind speed sensor detects the current wind speed at the air inlet of the air conditioner indoor unit, the pump water system can spray the condensed water in the water collecting tank to the filter screen and drain the sewage in the sewage tank to the outside of the air conditioner indoor unit, and the controller is configured to control the pump water system to spray the condensed water in the water collecting tank to the filter screen when the current wind speed is less than the preset wind speed, so that the air conditioner indoor unit can detect the pollution degree of the filter screen through the wind speed sensor and automatically clean the filter screen through the pump water system. Therefore, the application avoids the cumbersome operation of manually cleaning the filter screen, and improves the user experience.

[0030] Further, the application acquires the current wind speed corresponding to each speed gear when the fan is first operated, and determines the preset wind speed corresponding to each speed gear according to the current wind speed, and then acquires the current speed gear of the fan while acquiring the current wind speed, and determines the current preset wind speed according to the current speed gear, so as to ensure the accuracy of the comparison between the current wind speed and the current preset wind speed.

[0031] Other beneficial effects of the application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improvement purposes, features and advantages of the application. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the present application, hereinafter, some embodiments of the present application will be described with reference to the accompanying drawings. It should be understood by those skilled in the art that the components or parts indicated by the same reference signs in different drawings are the same or similar; the drawings of the present application are not necessarily drawn to scale.

[0033] In the drawings:

[0034] Figure 1 is a schematic view of an air conditioner according to the technical purpose of the present application;

[0035] Figure 2 is a schematic view of a sectional view of an indoor unit of an air conditioner according to the technical purpose of the present application;

[0036] Figure 3 is a schematic view of the internal structure of an indoor unit of an air conditioner in some embodiments of the present application;

[0037] Figure 4 is a schematic view of the structure of a sewage liquid level sensor in some embodiments of the present application. DETAILED DESCRIPTION

[0038] It should be understood by those skilled in the art that the embodiments described below are only some of the embodiments of the present application, rather than all the embodiments of the present application, and are intended to explain the technical principles of the present application, rather than to limit the protection scope of the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should still fall within the protection scope of the present application.

[0039] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] Further, it needs to be explained that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, and can also be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, it needs to be explained that in the description of the present application, the terms "cold" and "heat" are two descriptions of the same physical state. That is, the higher the "cold" of a certain target (such as an evaporator, air, a condenser, etc.), the lower the "heat" it has, and the lower the "cold" it has, the higher the "heat" it has. A certain target absorbs "cold" while releasing "heat", and releases "cold" while absorbing "heat". A certain target saves "cold" or "heat" to keep the target at the current temperature. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, that is, a certain target (such as an evaporator) absorbs heat while refrigerating.

[0042] As shown in FIG. 1, Figure 1 In the present application, the air conditioner includes an air conditioner indoor unit 100 and an air conditioner outdoor unit 200. Among them, the air conditioner indoor unit 100 can be a hanging machine, can also be a cabinet machine, and can also be an air conditioner in any other feasible form.

[0043] The air conditioner indoor unit 100 of the present application will be described below with reference to Figure 2 and taking a hanging machine as an example.

[0044] As shown in FIG. 1, Figure 2 In some embodiments of the present application, the air conditioner indoor unit 100 includes a casing 110, an evaporator 121, a fan 122, and a filter screen 123. Among them, the casing 110 is provided with an air inlet 111 and an air outlet 112. The evaporator 121 is arranged in the casing 110 and is used to cool the air in the casing 110. The fan 122 is arranged in the casing 110 and is used to drive the air from the outside to enter the casing 110 through the air inlet 111, and to drive the air to flow from the air inlet 111 to the air outlet 112 and then to the outside. The filter screen 123 is arranged between the air inlet 111 and the evaporator 121, and is used to filter dust, flocculation and other foreign matters in the air.

[0045] As shown in FIG. 1, Figure 3 In some embodiments of the present application, the air conditioner indoor unit 100 further includes a water collecting groove 131 arranged below the evaporator 121 and used to collect the condensed water left on the evaporator 121.

[0046] The water receiving groove 131 can be a member with a cavity and a top opening, such as a box, a tray, etc. The water receiving groove 131 is fixedly connected with the casing 110 or integrally formed.

[0047] Alternatively, the water receiving groove 131 can also be a space structure formed inside the casing 110.

[0048] Continuing to refer to Figure 3 , the air conditioner indoor unit 100 further comprises a sewage groove 132, which is arranged below the filter screen 123 and used to receive sewage flowing down from the filter screen 123.

[0049] The sewage groove 132 can be a member with a cavity and a top opening, such as a box, a tray, etc. The sewage groove 132 is fixedly connected with the casing 110 or integrally formed.

[0050] Alternatively, the sewage groove 132 can also be a space structure formed inside the casing 110.

[0051] Optionally, the sewage groove 132 has a sewage outlet (not shown in the figure), and the inner bottom surface of the sewage groove 132 gradually decreases towards the direction close to the sewage outlet, so as to ensure that the sewage in the sewage groove 132 can be discharged through the sewage outlet.

[0052] Continuing to refer to Figure 3 , the air conditioner indoor unit 100 further comprises a pump water system 140, which is configured to be able to spray the condensed water in the water receiving groove 131 onto the filter screen 123 and to be able to discharge the sewage in the sewage groove 132 outside the casing 110.

[0053] Continuing to refer to Figure 3 , the pump water system 140 comprises a water pump 141, a nozzle 142 for spraying the filter screen 123, a drainage member 143, an upstream control valve 144 arranged between the water pump 141 and the water receiving groove 131, and a downstream control valve 145 arranged between the water pump 141 and the nozzle 142. The upstream control valve 144 is further fluidly connected with the sewage groove 132, and the downstream control valve 145 is further fluidly connected with the drainage member 143.

[0054] As can be seen from Figure 3 , the water receiving groove 131, the sewage groove 132 and the water pump 141 are respectively connected with the upstream control valve 144 through water pipes, and in addition, a person skilled in the art can also connect at least one of the water receiving groove 131, the sewage groove 132 and the water pump 141 directly with the upstream control valve 144 according to needs.

[0055] As can be seen from Figure 3It can also be seen that the sewage tank 132 and the water pump 141 are respectively connected to the downstream control valve 145 through water pipes. In addition, those skilled in the art can also connect the sewage tank 132 and / or the water pump 141 directly to the downstream control valve 145 as needed.

[0056] Furthermore, in some embodiments of the present invention, the drainage component 143 is a water pipe directly connected to the downstream control valve 145. Additionally, those skilled in the art can, as needed, configure the drainage component 143 as any other feasible component, such as a connector that can be fluidly connected to the downstream control valve 145 via a water pipe.

[0057] from Figure 3 It is understandable that the water pipe connecting the upstream control valve 144 to the sewage tank 132 is connected to the sewage outlet of the sewage tank 132 to ensure that all sewage in the sewage tank 132 can be discharged.

[0058] Continue reading Figure 3 The upstream control valve 144 includes a first upstream inlet 1441 fluidly connected to the water receiving tank 131, a second upstream inlet 1442 fluidly connected to the sewage tank 132, and an upstream outlet 1443 fluidly connected to the inlet of the water pump 141. The downstream control valve 145 includes a downstream inlet 1451 fluidly connected to the outlet of the water pump 141, a first downstream outlet 1452 fluidly connected to the drainage component 143, and a second downstream outlet 1453 fluidly connected to the nozzle 142.

[0059] To achieve the above objectives, the upstream control valve 144 and / or the downstream control valve 145 may be three-way valves, and in particular, two-position three-way solenoid valves.

[0060] When the upstream control valve 144 is a two-position three-way solenoid valve, when the upstream control valve 144 is de-energized, the first upstream inlet 1441 is connected to the upstream outlet 1443; when the upstream control valve 144 is energized, the second upstream inlet 1442 is connected to the upstream outlet 1443.

[0061] When the downstream control valve 145 is a two-position three-way solenoid valve, when the downstream control valve 145 is de-energized, the first downstream inlet 1451 is connected to the downstream outlet; when the downstream control valve 145 is energized, the second downstream inlet 1451 is connected to the downstream outlet.

[0062] In addition, those skilled in the art may, as needed, configure the upstream control valve 144 and / or the downstream control valve 145 as two parallel shut-off valves.

[0063] like Figure 3As shown, in some embodiments of the present application, the air conditioner indoor unit 100 further comprises a first water level sensor 151 for detecting the water level in the water collecting tank 131 and a second water level sensor 152 for detecting the water level in the water collecting tank 131. The water level detected by the second water level sensor 152 is lower than the water level detected by the first water level sensor 151.

[0064] In some embodiments of the present application, when the first water level sensor 151 is triggered, it indicates that there is enough condensed water in the water collecting tank 131 for the pump water system 140 to clean the filter screen 123. When the filter screen 123 does not need to be cleaned, the pump water system 140 discharges the condensed water in the water collecting tank 131 to the outside of the air conditioner indoor unit 100 when the second water level sensor 152 is triggered.

[0065] In addition, in other embodiments of the present application, the second water level sensor 152 can be omitted by those skilled in the art as needed, and when the first water level sensor 151 is triggered, if the filter screen 123 needs to be cleaned, the pump water system 140 cleans the filter screen 123; if the filter screen 123 does not need to be cleaned, the pump water system 140 discharges the condensed water in the water collecting tank 131 to the outside of the air conditioner indoor unit 100.

[0066] Continuing to refer to Figure 3 In some embodiments of the present application, the air conditioner indoor unit 100 can further comprise a sewage water level sensor 160 for detecting the water level in the sewage tank 132.

[0067] In some embodiments of the present application, when the sewage water level sensor 160 is triggered, the pump water system 140 discharges the sewage water in the sewage tank 132 to the outside of the air conditioner indoor unit 100.

[0068] Further as Figure 4 shown, the sewage water level sensor 160 comprises a high water level switch 161 for detecting the highest water level in the sewage tank 132 and a low water level switch 162 located below the high water level switch 161 for detecting the lowest water level in the sewage tank 132.

[0069] The high water level switch 161 is used to ensure that the filter screen 123 has enough spraying time, and the low water level switch 162 is used to detect whether the sewage water in the sewage tank 132 is completely discharged.

[0070] As Figure 3 shown, in some embodiments of the present application, the air conditioner indoor unit 100 further comprises a wind speed sensor 170 arranged between the filter screen 123 and the evaporator 121. The wind speed sensor 170 is used to detect the current wind speed at the air inlet 111.

[0071] In addition, the skilled in the art can also set the wind speed sensor 170 at any other feasible position according to the needs, for example, set at the side of the filter screen 123 far away from the evaporator 121.

[0072] With reference to the foregoing Figure 3 In some embodiments of the present application, the air conditioner indoor unit 100 further comprises a controller 180 for controlling the operation of the air conditioner. In addition, the skilled in the art can also install the controller 180 on the air conditioner outdoor unit 200 according to the needs.

[0073] From Figure 3 As can be seen from the above, the first liquid level sensor 151, the second liquid level sensor 152, the sewage liquid level sensor 160 and the wind speed sensor 170 are respectively electrically connected with the controller 180, so that the controller 180 collects the signals of the first liquid level sensor 151, the second liquid level sensor 152, the sewage liquid level sensor 160 and the wind speed sensor 170, to determine whether the first liquid level sensor 151, the second liquid level sensor 152 and the sewage liquid level sensor 160 are triggered, and to determine the current wind speed at the air inlet 111.

[0074] Further, the water pump 141, the upstream control valve 144 and the downstream control valve 145 are respectively electrically connected with the controller 180, so that the controller 180 controls the operation of the water pump 141, the upstream control valve 144 and the downstream control valve 145.

[0075] Further, the air fan 122 can also be electrically connected with the controller 180, so that the controller 180 controls the operation of the air fan 122.

[0076] In some embodiments of the present application, the controller 180 is configured to, when the wind speed sensor 170 detects that the current wind speed is less than the preset wind speed, control the pump water system 140 to spray the condensed water in the water collecting tank 131 onto the filter screen 123.

[0077] In some embodiments of the present application, the controller 180 is configured to, when the wind speed sensor 170 detects that the current wind speed is less than the preset wind speed, control the pump water system 140 to spray the condensed water in the water collecting tank 131 onto the filter screen 123.

[0078] Step S101, detecting the state of the first liquid level sensor 151 when the current wind speed is less than the preset wind speed.

[0079] Step S102, when the first liquid level sensor 151 is triggered, controlling the pump water system 140 to spray the condensed water in the water collecting tank 131 onto the filter screen 123. In this way, it can be ensured that the water collecting tank 131 has sufficient condensed water for the pump water system 140 to flush the filter screen 123.

[0080] Further, the "controlling the pump water system 140 to spray the condensed water in the water collecting groove 131 to the filter screen 123" further comprises: controlling the upstream control valve 144 to connect the inlet of the water pump 141 with the water collecting groove 131, controlling the downstream control valve 145 to connect the outlet of the water pump 141 with the nozzle 142, and controlling the water pump 141 to work to spray the filter screen 123.

[0081] Specifically, the first upstream inlet 1441 of the upstream control valve 144 is connected with the upstream outlet 1443, so that the water collecting groove 131 is connected with the water pump 141 through the upstream control valve 144. The downstream inlet 1451 of the downstream control valve 145 is connected with the second downstream outlet 1453, so that the water pump 141 is connected with the nozzle 142. Then the water pump 141 is controlled to work.

[0082] In some embodiments of the present application, the controller 180 is further configured to, when it is detected that the sewage liquid level sensor 160 is triggered, control the upstream control valve 144 to connect the inlet of the water pump 141 with the sewage collecting groove 132, control the downstream control valve 145 to connect the outlet of the water pump 141 with the drainage member 143, and control the water pump 141 to work to drain the sewage in the sewage collecting groove 132.

[0083] Specifically, when the high liquid level switch 161 of the sewage liquid level sensor 160 is triggered, it indicates that the sewage in the sewage collecting groove 132 is enough. At this time, the water pump 141 can be paused first, and then the second upstream inlet 1442 of the upstream control valve 144 is connected with the upstream outlet 1443, so that the sewage collecting groove 132 is connected with the water pump 141 through the upstream control valve 144. The downstream inlet 1451 of the downstream control valve 145 is connected with the first downstream outlet 1452, so that the water pump 141 is connected with the drainage member 143. Then the water pump 141 is controlled to work.

[0084] When the low liquid level switch 162 is no longer triggered (or the water pump 141 can also be controlled to work for a period of time (for example, 30S, 1min, 3min, etc.)), it indicates that the sewage in the sewage collecting groove 132 has been drained clean. Then the first upstream inlet 1441 of the upstream control valve 144 is connected with the upstream outlet 1443, so that the water collecting groove 131 is connected with the water pump 141 through the upstream control valve 144. The downstream inlet 1451 of the downstream control valve 145 is connected with the second downstream outlet 1453, so that the water pump 141 is connected with the nozzle 142. The water pump 141 is controlled to work again to flush the filter screen 123.

[0085] In some embodiments of the present application, the controller 180 is further configured to, when the current wind speed is greater than or equal to the preset wind speed, control the upstream control valve 144 to communicate the inlet of the water pump 141 with the water collecting groove 131, control the downstream control valve 145 to communicate the outlet of the water pump 141 with the drainage member 143, and control the water pump 141 to stop working.

[0086] Specifically, when the current wind speed detected by the wind speed sensor 170 is greater than or equal to the current preset wind speed, it indicates that the filter screen 123 has been cleaned. At this time, the water pump 141 is immediately (or after a period of time) paused, the second upstream inlet 1442 of the upstream control valve 144 is communicated with the upstream outlet 1443, so that the sewage groove 132 is communicated with the water pump 141 through the upstream control valve 144. The downstream inlet 1451 of the downstream control valve 145 is communicated with the first downstream outlet 1452, so that the water pump 141 is communicated with the drainage member 143. Then the water pump 141 is controlled to work again. When the low liquid level switch 162 is no longer triggered, the first upstream inlet 1441 of the upstream control valve 144 is communicated with the upstream outlet 1443, so that the water collecting groove 131 is communicated with the water pump 141 through the upstream control valve 144. The downstream inlet 1451 of the downstream control valve 145 is communicated with the first downstream outlet 1452, so that the water pump 141 is communicated with the drainage member 143. At the same time, the water pump 141 is controlled to stop working.

[0087] In some embodiments of the present application, the water pump system 140 provides clean condensate water for the sewage groove 132, flushes the sewage groove 132, and prevents dirt from adhering to the sewage groove 132.

[0088] It should be noted that in some embodiments of the present application, the preset wind speed can be a specific value or a range value.

[0089] It can be understood by those skilled in the art that when the preset wind speed is a range value, it can ensure that the filter screen 123 is cleaned and reduce the cleaning frequency of the filter screen 123. Specifically, when the current wind speed is less than the minimum value of the range, the water pump system 140 is controlled to spray the condensate water in the water collecting groove 131 onto the filter screen 123. During the cleaning of the filter screen 123 by the water pump system 140, when the current wind speed is greater than or equal to the maximum value of the range, it is determined that the filter screen 123 is cleaned, and the cleaning of the filter screen 123 by the water pump system 140 is stopped.

[0090] In some embodiments of the present application, the controller 180 is further configured to, when the current wind speed is greater than or equal to the preset wind speed, detect the state of the second liquid level sensor 152. When the second liquid level sensor 152 is triggered, the water pump 141 is controlled to work.

[0091] The water pump 141 can stop working when the second liquid level sensor 152 is no longer triggered, or can stop working after working for a preset time length (for example, 30 seconds, 1 minute, 90 seconds, 2 minutes, or any feasible time length).

[0092] Further, in the present application, each speed gear of the fan 122 can correspond to a preset wind speed, so as to determine the current preset wind speed by obtaining the current speed gear of the fan 122. The preset wind speed can be stored in the air conditioner indoor unit 100 in advance before the air conditioner indoor unit 100 is shipped, or can be obtained by the air conditioner indoor unit 100 from a cloud server or a background server through the Internet, or can be determined by obtaining the current wind speed corresponding to each speed gear and determining the preset wind speed corresponding to each speed gear according to the current wind speed when the fan 122 is first operated after the air conditioner indoor unit 100 is installed in the user's home.

[0093] The preset wind speed can be smaller than the current wind speed by a certain value, for example, 80%, 75%, or 60% of the current wind speed. If the preset wind speed is a numerical range, the preset wind speed can be 85% to 90%, 70% to 85%, or 60% to 90% of the current wind speed.

[0094] In some embodiments of the present application, the controller 180 is further configured to obtain the current speed gear of the fan 122 while obtaining the current wind speed, and determine the current preset wind speed according to the current speed gear, so as to ensure the reliability and accuracy of the comparison between the current wind speed and the current preset wind speed.

[0095] In this way, the error judgment that the current wind speed is always greater (or for a long time) than the preset wind speed when the speed gear of the fan 122 is high is avoided, which increases the energy consumption of the air conditioner. When the speed gear of the fan 122 is low, the error judgment that the current wind speed is easily less than the preset wind speed is avoided, which increases the cleaning frequency of the filter screen 123.

[0096] Based on the foregoing description, those skilled in the art can understand that the air conditioner and the air conditioner indoor unit 100 thereof can automatically detect the contamination degree of the filter screen 123, automatically clean the filter screen 123 when the filter screen 123 is dirty, automatically drain the condensate water in the water collecting tank 131, and automatically drain the sewage in the sewage tank 132, which releases the hands of the user and improves the user experience.

[0097] Meanwhile, the pump water system 140 is arranged to include a water pump 141, a nozzle 142 for spraying the filter screen 123, an upstream control valve 144 arranged between the water pump 141 and the water receiving groove 131, and a downstream control valve 145 arranged between the water pump 141 and the nozzle 142, the upstream control valve 144 is further connected with the sewage groove 132 in a fluid manner, and the downstream control valve 145 is further connected with a drainage member 143, so that the air conditioner indoor unit 100 can realize the discharge of condensed water, the cleaning of the filter screen 123 and the discharge of sewage through only one water pump 141, and the cost is low.

[0098] So far, the technical solutions of the present application have been described in combination with the foregoing embodiments, but those skilled in the art can easily understand that the protection scope of the present application is not limited to these specific embodiments. Those skilled in the art can split and combine the technical solutions in the above-mentioned embodiments, or make equivalent changes or replacements to the related technical features, without deviating from the technical principles of the present application. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. An air conditioner indoor unit, comprising: a water receiving tank configured to receive condensed water left from an evaporator of the air conditioner indoor unit; a sewage receiving tank configured to receive sewage flowed from a filter screen of the air conditioner indoor unit; a pump water system comprising a water pump, a nozzle configured to spray the filter screen, an upstream control valve, a downstream control valve, and a drainage member, the upstream control valve comprising a first upstream inlet fluidly connected to the water receiving tank, a second upstream inlet fluidly connected to the sewage receiving tank, and an upstream outlet fluidly connected to an inlet of the water pump, the downstream control valve comprising a downstream inlet fluidly connected to an outlet of the water pump, a first downstream outlet fluidly connected to the drainage member, and a second downstream outlet fluidly connected to the nozzle, the drainage member configured to drain the sewage in the sewage receiving tank out of the air conditioner indoor unit; a wind speed sensor configured to detect a current wind speed at an air inlet of the air conditioner indoor unit; a first liquid level sensor configured to detect a liquid level in the water receiving tank; a controller configured to, when the current wind speed is less than a preset wind speed, detect a state of the first liquid level sensor, and when the first liquid level sensor is triggered, control the upstream control valve to communicate the inlet of the water pump with the water receiving tank, control the downstream control valve to communicate the outlet of the water pump with the nozzle, and control the water pump to work. 2.The air conditioner indoor unit of claim 1, wherein the air conditioner indoor unit further comprises a sewage liquid level sensor configured to detect a liquid level in the sewage receiving tank, and the controller is further configured to, when it is detected that the sewage liquid level sensor is triggered, control the upstream control valve to communicate the inlet of the water pump with the sewage receiving tank, control the downstream control valve to communicate the outlet of the water pump with the drainage member, and control the water pump to work. 3.The air conditioner indoor unit of claim 1, wherein the controller is further configured to, when the current wind speed is greater than or equal to the preset wind speed, control the upstream control valve to communicate the inlet of the water pump with the water receiving tank, control the downstream control valve to communicate the outlet of the water pump with the drainage member, and control the water pump to stop working. 4.The air conditioner indoor unit of claim 3, wherein the air conditioner indoor unit further comprises a second liquid level sensor configured to detect a liquid level in the water receiving tank, the liquid level detected by the second liquid level sensor being lower than the liquid level detected by the first liquid level sensor, and the controller is further configured to, when the current wind speed is greater than or equal to the preset wind speed, detect a state of the second liquid level sensor, and when the second liquid level sensor is triggered, control the water pump to work. 5.The air conditioner indoor unit of claim 1, wherein each rotational speed gear of a fan of the air conditioner indoor unit corresponds to a preset wind speed, and the controller is further configured to, when the current wind speed is acquired, acquire a current rotational speed gear of the fan, and determine a current preset wind speed according to the current rotational speed gear. 6.The air conditioner indoor unit of claim 5, wherein ​ The controller is further configured to, when the fan is first operated, acquire a current wind speed corresponding to each rotating speed gear, and determine a preset wind speed corresponding to each rotating speed gear according to the current wind speed.

7. An air conditioner comprising an air conditioner outdoor unit and the air conditioner indoor unit according to any one of claims 1 to 6.

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