Mobile air conditioner and anomaly detection method for water fetching machine of mobile air conditioner

Abstract

The invention discloses a mobile air conditioner and a mobile air conditioner water fetching machine abnormity detection method, and the mobile air conditioner water fetching machine abnormity detection method comprises a refrigeration loop which allows a refrigerant to circulate through a compressor, a condenser, a throttling part and an evaporator in sequence; the water pan is used for receiving and storing condensate water generated during operation of the mobile air conditioner; the water fetching machine is arranged at a preset position on the water pan and is used for spraying water in the water pan to the condenser through a water fetching wheel; and a controller. The operation rotating speed of the water fetching machine during operation and the operation state of the compressor are monitored in real time; and when the running rotating speed, the running state and the starting rotating speed all meet preset foreign matter judgment conditions, the mobile air conditioner is controlled to stop, and a foreign matter alarm prompt is output. According to the scheme, foreign matter obstruction of the water fetching wheel can be detected, and water full shutdown caused by false triggering of the water fetching machine is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, and particularly relates to a mobile air conditioner and an abnormal detection method for a water pump of the mobile air conditioner. BACKGROUND

[0002] Condensate water is generated when the air conditioner is running, and needs to be stored by a water receiving tray arranged internally. In order to avoid overflow of the condensate water, the water level of the water receiving tray needs to be detected. With the maturity of water pump motor technology, a direct current water pump motor is used to replace a water level switch to detect the water level state of the water receiving tray, and the rotation speed of the water pump motor is calculated through a rotation speed feedback signal of the water pump motor. When the water receiving tray is at different water levels, the water resistance experienced by the water pump wheel of the fixedly installed water pump is different, and the rotation speed of the water pump wheel will be different based on the same driving force, so the water level state of the water receiving tray can be monitored in real time through comparison of the rotation speeds.

[0003] When the water level is detected through the rotation speed of the water pump wheel of the water pump, it is easy to be affected by environmental factors. For example, when there is foreign matter in the water receiving tray, it can cause the water pump to be hindered from normal operation, directly causing abnormal detection of water fullness, and easily triggering water fullness alarm shutdown, thereby affecting the normal operation of the air conditioner. SUMMARY

[0004] In view of the above problems of the prior art, the present application provides a mobile air conditioner and an abnormal detection method for a water pump of the mobile air conditioner, which can detect foreign matter hindering of the water pump wheel and avoid false triggering of water fullness shutdown of the water pump.

[0005] The embodiment of the present application provides a mobile air conditioner, comprising:

[0006] a refrigeration circuit, in which refrigerant circulates sequentially through a compressor, a condenser, a throttling component and an evaporator;

[0007] a water receiving tray, configured to receive and store condensate water generated when the mobile air conditioner is running;

[0008] a water pump, configured at a preset position on the water receiving tray, and configured to spray water in the water receiving tray to the condenser through a water pump wheel;

[0009] a controller, configured to:

[0010] record a starting rotation speed of the water pump when the water pump is started after the mobile air conditioner is started;

[0011] monitor a running rotation speed of the water pump and a running state of the compressor in real time;

[0012] when the running rotation speed, the running state and the starting rotation speed all satisfy a preset foreign matter determination condition, control the mobile air conditioner to stop and output a foreign matter alarm prompt.

[0013] Preferably, the controller is further configured to:

[0014] determine an initial water level state at start-up according to the start-up rotating speed;

[0015] determine a current water level state of the water pan according to the running rotating speed;

[0016] determine whether the foreign matter determination condition is met according to the current water level state, the initial water level state, and the running state.

[0017] Further, the controller is further configured to:

[0018] determine that the initial water level state is a waterless state when the start-up rotating speed is not less than a preset waterless rotating speed;

[0019] determine that the current water level state is a water full state when the running rotating speed is not greater than a preset water full rotating speed.

[0020] Preferably, the controller is further configured to:

[0021] determine that the running rotating speed, the running state, and the start-up rotating speed all meet the foreign matter determination condition when the current water level state is a water full state, the running state is a stop state, and the initial water level state is a waterless state.

[0022] As a preferred solution, the controller is further configured to:

[0023] when the running rotating speed is less than a preset lower limit rotating speed, perform a preset number of start-stop cycles on the water hitting machine at preset running intervals and stop intervals, and then detect the current rotating speed of the water hitting machine again;

[0024] when the current rotating speed is less than the lower limit rotating speed, determine that the water hitting wheel of the water hitting machine is stuck by foreign matter, control the mobile air conditioner to stop, and output the foreign matter alarm prompt.

[0025] Preferably, the controller is further configured to:

[0026] when the current water level state is a water full state, the running state is a stop state, and the initial water level state is not a waterless state, control the mobile air conditioner to stop and output a water full alarm prompt.

[0027] Preferably, the controller is further configured to:

[0028] when the current water level state is a water full state, the initial water level state is a waterless state, and the running state is not a stop state, calculate the running duration of the compressor.

[0029] When the running duration is less than a preset first threshold duration, it is determined that the water spraying wheel of the water dispenser has foreign matter, the mobile air conditioner is controlled to stop, and the foreign matter alarm prompt is output.

[0030] Preferably, the controller is further configured to:

[0031] When the running duration is not less than the first threshold duration, the mobile air conditioner is controlled to stop, and the full water alarm prompt is output.

[0032] Preferably, the controller is further configured to:

[0033] After the mobile air conditioner is powered on, the standby duration of the mobile air conditioner in a standby state is calculated, and the ambient temperature is detected;

[0034] When the standby duration is not less than a preset second threshold duration, and the ambient temperature is within a preset first temperature range, it is determined that the water tray is in a waterless state, and the rotating speed after the water dispenser is started is read as the waterless rotating speed.

[0035] The embodiment of the application also provides a mobile air conditioner water dispenser abnormality detection method, the mobile air conditioner comprising:

[0036] A refrigeration circuit, in which a refrigerant is circulated through a compressor, a condenser, a throttling component, and an evaporator in sequence;

[0037] A water tray for receiving and storing condensate water generated when the mobile air conditioner is running;

[0038] A water dispenser configured at a preset position on the water tray, for spraying water in the water tray to the condenser through a water spraying wheel;

[0039] A controller;

[0040] The method comprises:

[0041] After the mobile air conditioner is powered on, the starting rotating speed of the water dispenser is recorded;

[0042] The running rotating speed of the water dispenser and the running state of the compressor are monitored in real time;

[0043] When the running rotating speed, the running state, and the starting rotating speed all satisfy a preset foreign matter determination condition, the mobile air conditioner is controlled to stop, and a foreign matter alarm prompt is output.

[0044] Compared with the prior art, the mobile air conditioner and the mobile air conditioner water hitting machine abnormality detection method disclosed by the application comprise: a refrigeration circuit, which is used for circulating refrigerant through a compressor, a condenser, a throttling component and an evaporator in sequence; a water pan, which is used for receiving and storing condensate water generated when the mobile air conditioner operates; a water hitting machine, which is arranged at a preset position on the water pan and is used for spraying water in the water pan to the condenser through a water hitting wheel; and a controller. The running speed of the water hitting machine when the water hitting machine operates and the operating state of the compressor are monitored in real time; when the running speed, the operating state and the starting speed all satisfy preset foreign matter determination conditions, the mobile air conditioner is controlled to stop and foreign matter alarm is output. The application scheme can detect foreign matter obstruction of the water hitting wheel and avoid false triggering of the water hitting machine. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is a structural schematic diagram of a mobile air conditioner provided by an embodiment of the application;

[0046] Figure 2 is a partial structural schematic diagram of a refrigeration circuit provided by an embodiment of the application;

[0047] Figure 3 is a control process schematic diagram of water level monitoring of the prior art;

[0048] Figure 4 is a flowchart of work performed by a controller provided by an embodiment of the application;

[0049] Figure 5 is another flowchart of work performed by a controller provided by an embodiment of the application;

[0050] Figure 6 is still another flowchart of work performed by a controller provided by an embodiment of the application;

[0051] Figure 7 is a control flowchart when a controller provided by an embodiment of the application judges foreign matter determination conditions;

[0052] Figure 8 is a control flowchart when a controller provided by an embodiment of the application judges foreign matter alarm;

[0053] Figure 9 is another control flowchart when a controller provided by an embodiment of the application judges foreign matter alarm;

[0054] Figure 10 is a flowchart of a mobile air conditioner water hitting machine abnormality detection method provided by an embodiment of the application. DETAILED DESCRIPTION

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] The air conditioner provided in this embodiment of the invention is specifically a portable air conditioner, which includes:

[0060] The refrigeration circuit circulates the refrigerant sequentially through the compressor, condenser, throttling device, and evaporator;

[0061] A drip tray is used to receive and store the condensate generated during the operation of the portable air conditioner;

[0062] A water pump, configured at a preset position on a water receiving tray, is used to spray water from the water receiving tray to the condenser via a water pumping wheel.

[0063] See Figure 1This is a schematic diagram of the structure of a portable air conditioner provided in an embodiment of the present invention. The portable air conditioner has a controller 140 and a refrigeration circuit 130. By circulating the refrigerant in the refrigeration circuit 130, a vapor compression refrigeration cycle can be executed. It is connected to the indoor and outdoor units using connecting pipes to form a refrigeration circuit for refrigerant circulation, thereby achieving refrigeration.

[0064] The portable air conditioner also includes a water collection tray 30 for collecting condensate produced during condenser operation; and a water sprayer 40 for spraying the condensate in the water collection tray 30 onto the condenser.

[0065] The portable air conditioner also includes a lower fan 50 for directing outside air through the condenser to regulate the condenser temperature.

[0066] See Figure 2 This is a partial structural schematic diagram of the refrigeration circuit provided in an embodiment of the present invention. In this application, the refrigeration circuit executes the refrigeration cycle of an air conditioner using a compressor 131, an indoor heat exchanger 132, a throttling device 133, and an outdoor heat exchanger 134. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, supplying refrigerant to the conditioned and heat-exchanged air. The indoor heat exchanger 132 is typically located in the indoor unit 110, while the compressor 131 and outdoor heat exchanger 134 are typically located in the outdoor unit 120. The throttling device 133 can be located in either the indoor unit 110 or the outdoor unit 120. The indoor heat exchanger 132 and outdoor heat exchanger 134 function as condensers or evaporators. When the indoor heat exchanger 132 functions as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger 132 functions as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0067] Compressor 131 compresses refrigerant gas at high temperature and high pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. Throttling component 133 causes the high-temperature, high-pressure liquid refrigerant condensed in the condenser to expand into a low-pressure liquid refrigerant. Evaporator evaporates the refrigerant that has expanded in throttling component 133 and returns the low-temperature, low-pressure refrigerant gas to compressor 131. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner can regulate the temperature of the indoor space.

[0068] To prevent the water tray from overflowing, the common practice in existing technology is to place a water level switch on the base of the portable air conditioner's water tray to detect the water level. (See [link to relevant documentation]). Figure 3This is a schematic diagram of the control process for water level monitoring using existing technology. Two water level switches are used. These switches detect the water level and have two states: on or off. During machine operation, if the low water level switch is closed, the lower fan operates at low speed, reducing the rate of condensate accumulation and increasing the evaporation rate. If the high water level switch is closed, the entire machine immediately shuts down for protection.

[0069] This technical solution identifies whether the water level has reached a preset height by judging whether the circuit is on or off. If it exceeds the preset value, the system will quickly shut down to prevent condensate from flowing onto the ground and causing damage.

[0070] With the maturation of water pump motor technology, using DC water pump motors to replace water level switches for detecting water levels in the drip tray is gradually becoming an industry trend, significantly reducing overall machine costs. The water pump motor's impeller sprays water from the tank onto the condenser to accelerate heat exchange, improving energy efficiency and preventing rapid condensate buildup that could cause shutdowns. The motor's rotational speed is calculated using a feedback signal; when the water level in the drip tray is high, the motor speed decreases, allowing for real-time monitoring of the drip tray's water level. However, water pump motors are susceptible to environmental factors. For example, foreign objects in the drip tray can interfere with the impeller, directly affecting the accuracy of the full-water detection. In situations where the water level is low or even empty, foreign objects can interfere with the water pump's impeller, creating resistance and affecting its operating speed. This lower speed leads the original water level calculation program to estimate the water level as full based on this lower speed, triggering a full water alarm. In some cases, the foreign object may even damage the impeller. Because users may not easily detect this problem, a jammed water pump will cause the portable air conditioner to continuously issue a full water alarm, severely impacting the use of the water pump and even the portable air conditioner itself.

[0071] To address the aforementioned technical problems, the controller provided in this embodiment of the invention is configured to perform the following steps:

[0072] After the portable air conditioner is turned on and running, the starting speed of the water pump is recorded.

[0073] The operating speed of the water pump and the operating status of the compressor are monitored in real time.

[0074] When the operating speed, the operating status, and the starting speed all meet the preset foreign object detection conditions, the portable air conditioner is controlled to stop and a foreign object alarm is output.

[0075] In the specific implementation of this embodiment, please refer to Figure 4 This is a flowchart illustrating the operation performed by the controller provided in this embodiment of the invention. When the controller monitors the water level, it specifically performs the following steps:

[0076] Step S401: After the machine is started, record the starting speed of the water pump.

[0077] Step S402: Monitor the operating speed of the water pump;

[0078] Step S403: Monitor the operating status of the compressor;

[0079] Step S404: Determine whether the operating speed, operating status, and starting speed all meet the foreign object determination conditions.

[0080] If so, proceed to step S405;

[0081] If not, return to step S402.

[0082] Step S405: It is determined that a foreign object has appeared in the water jet of the water pump.

[0083] Step S406: Control the portable air conditioner to stop and output a foreign object alarm.

[0084] It should be noted that, in this embodiment, the foreign object determination conditions include conditions set for the operating speed, operating state, and starting speed. To determine whether the foreign object determination conditions are met, the operating speed, the operating state, and the starting speed must simultaneously or partially meet certain conditions.

[0085] Specifically, the operating speed can monitor the current operation of the water pump and determine the water level detected by the water pump at this time. The starting speed can determine the water level position when the water pump starts. By combining the water level in the initial state, the water level during operation, and the operating state of the compressor, it is possible to determine whether the detected water level is abnormal at this time, and thus determine the current speed of the water pump, thereby realizing the detection of foreign object interference.

[0086] This invention determines whether there is foreign object interference by measuring the starting speed of the water pump, the operating status of the compressor, and the operating speed of the water pump during operation, and formulates corresponding control strategies to avoid continuous reduction of the detection speed due to foreign object interference, which would lead to continuous false judgments of full water.

[0087] In yet another embodiment provided by the present invention, the controller is further configured to:

[0088] The initial water level at startup is determined based on the aforementioned startup speed.

[0089] The current water level of the water receiving tray is determined based on the operating speed.

[0090] Based on the current water level, the initial water level, and the operating status, determine whether the foreign object detection conditions are met.

[0091] In the specific implementation of this embodiment, when determining the foreign object detection conditions, a corresponding control process needs to be executed, see [link to relevant documentation]. Figure 5 This is another flowchart illustrating the operation performed by the controller provided in this embodiment of the invention. When the controller monitors the water level, it specifically performs the following steps:

[0092] Step S501: After the machine is started, record the starting speed of the water pump.

[0093] Step S502: Determine the initial water level status during startup.

[0094] Step S503: Monitor the operating speed of the water pump.

[0095] Step S504: Determine the current water level status;

[0096] Step S505: Monitor the operating status of the compressor.

[0097] It should be noted that the water level detected by the water pump can be determined based on the pump's rotational speed. Specifically, when determining the water level based on the operating speed, a pre-defined matching relationship between rotational speed and water level can be used. The corresponding water level is matched against a preset water level matching database based on the operating speed. Alternatively, the water level can be calculated using a simulation model of rotational speed versus water level.

[0098] Step S506: Determine whether the current water level, initial water level, and operating status all meet the corresponding conditions in the foreign object determination criteria.

[0099] If so, proceed to step S507;

[0100] If not, return to step S503.

[0101] Step S507: It is determined that a foreign object has appeared in the water jet of the water pump.

[0102] Step S508: Control the portable air conditioner to stop and output a foreign object alarm.

[0103] It should be noted that in this embodiment, the foreign object determination conditions include the conditions set for the operating speed, operating status, and starting speed. To determine whether the foreign object determination conditions are met, it is necessary to first determine the detected water level status based on the operating speed and starting speed, determine the water level change in the receiving pan after operation, and combine the operating status of the compressor during the water level change process to determine whether the detected water level is abnormal at this time, thereby determining the current speed of the water pump and achieving accurate detection of foreign object interference.

[0104] In yet another embodiment provided by the present invention, the controller is further configured to:

[0105] When the starting speed is not less than the preset waterless speed, the initial water level is determined to be in a waterless state.

[0106] When the operating speed is not greater than the preset full water speed, the current water level is determined to be in a full water state.

[0107] In the specific implementation of this embodiment, please refer to Figure 6 This is another flowchart illustrating the operation performed by the controller provided in this embodiment of the invention. Specifically, when determining the water level status, the following steps are executed:

[0108] Step S601: After the machine is started, record the starting speed V0 of the water pump.

[0109] Step S602, determine the starting speed V0 ≥ V SK Whether it is valid or not.

[0110] It should be noted that V SK The dry rotation speed is the rotational speed monitored when the water dispenser is dry in the water collection tray; it represents the maximum operating speed of the water dispenser. This can be determined experimentally or through statistical methods.

[0111] If so, proceed to step S603;

[0112] If not, proceed to step S604.

[0113] Step S603: Determine that the initial water level is in a state of no water, and proceed to step S605;

[0114] Step S604: Determine that the initial water level is not in a waterless state, and proceed to step S605.

[0115] Step S605: Monitor the operating speed V of the water pump. t .

[0116] Step S606, determine the operating speed V t ≤V SG Whether it is valid or not.

[0117] It should be noted that V SG This refers to the rotational speed of the water pump when it is full of water; the specific speed can be determined through experiments or statistical methods.

[0118] If so, proceed to step S607;

[0119] If not, proceed to step S608.

[0120] Step S607: Determine that the current water level is full.

[0121] Step S608: Determine that the initial water level is not full.

[0122] Determine if the current operating speed is not greater than the full water speed V. SG If this condition is met, it means that the water level in the current water receiving tray has reached the preset height for full water, i.e., the water is full.

[0123] By comparing the rotation speed of the water pump with the predetermined empty rotation speed and full rotation speed, it is determined whether the initial water level is empty and whether the current water level is full, which serves as the basis for subsequent foreign object identification.

[0124] In yet another embodiment provided by the present invention, the controller is further configured to:

[0125] When the current water level is full, the operating state is stopped, and the initial water level is empty, it is determined that the operating speed, the operating state, and the starting speed all meet the foreign object determination conditions.

[0126] In the specific implementation of this embodiment, please refer to Figure 7 This is a schematic diagram of the control flow when the controller performs foreign object detection condition judgment according to the embodiment of the present invention. The specific steps are as follows:

[0127] Step S701: After the machine is started, record the starting speed V0 of the water pump.

[0128] Step S702, determine the starting speed V0 ≥ V SK Whether it is valid or not.

[0129] It should be noted that V SK The dry rotation speed is the rotational speed monitored when the water dispenser is dry in the water collection tray; it represents the maximum operating speed of the water dispenser. This can be determined experimentally or through statistical methods.

[0130] If so, proceed to step S703;

[0131] If not, execute other control processes.

[0132] Step S703: Determine the initial water level status as a waterless state;

[0133] Step S704: Monitor the operating speed V of the water pump. t .

[0134] Step S705, determine the operating speed V t ≤V SG Whether it is valid or not.

[0135] It should be noted that V SG This refers to the rotational speed of the water pump when it is full of water; the specific speed can be determined through experiments or statistical methods.

[0136] If so, proceed to step S706;

[0137] If not, execute other control processes.

[0138] Step S706: Determine that the current water level is full.

[0139] Step S707: Monitor the operating status of the compressor.

[0140] Step S708: Determine whether the running status is a stopped state.

[0141] If so, proceed to step S709.

[0142] If not, execute other control processes.

[0143] Step S709: Determine if the foreign object determination condition is met.

[0144] Step S710: Control the portable air conditioner to stop and output a foreign object alarm.

[0145] The above judgment process indicates that the water tray is empty when the machine is turned on, but the water pump speed detects that the water tray is full during actual operation. However, the compressor is not turned on and no condensate is produced. It can be determined that there is interference from a foreign object, so the fault code EE is displayed and the whole machine is forced to shut down for protection.

[0146] In yet another embodiment provided by the present invention, the controller is further configured to:

[0147] When the operating speed is less than the preset lower limit speed, the water pump is subjected to a preset number of start-stop cycles with preset operating intervals and stop intervals, and then the current speed of the water pump is detected again.

[0148] When the current rotational speed is less than the lower limit rotational speed, it is determined that the water pump impeller is jammed by a foreign object, the portable air conditioner is controlled to stop, and a foreign object alarm is output.

[0149] In yet another embodiment provided by the present invention, see Figure 8 This is a schematic diagram of the control flow when the controller performs foreign object alarm judgment according to an embodiment of the present invention. The specific steps are as follows:

[0150] Step S801: After the machine is started, record the starting speed V0 of the water pump.

[0151] Step S802: Monitor the operating speed V of the water pump. t .

[0152] Step S803, determine the operating speed Vt ≤V th Whether it is valid or not.

[0153] If not, execute other control processes.

[0154] If so, proceed to step S804.

[0155] Step S804: Perform three start-stop cycles on the water pump. That is, force the water pump motor to start for 5 seconds and stop for 5 seconds in sequence, performing a total of three cycles.

[0156] It should be noted that in this embodiment, the start-stop cycle is executed with a 5-second start and a 5-second stop interval, and the number of executions is set to 3. In other embodiments, other parameters can be set to execute the start-stop cycle.

[0157] Step S805: Read the current rotation speed V of the water pump. t+1 .

[0158] Step S806, determine the operating speed V t ≤V th Whether it is valid or not.

[0159] If not, execute other control processes.

[0160] If so, proceed to step S807.

[0161] It should be noted that the lower limit speed V th It can be set to a speed value that is less than the full rotation speed of the water, but in actual implementation, it can be set directly to 0.

[0162] Step S807: It is determined that a foreign object has jammed the water jet of the water pump.

[0163] Step S808: Control the portable air conditioner to stop and output a foreign object alarm.

[0164] If the water pump's rotation speed is detected to be 0, it is initially determined that the water pump impeller is jammed by a foreign object or the water pump motor itself is damaged. The water pump is then forcibly started for 5 seconds and stopped for 5 seconds, and the SC value is checked again. This cycle is repeated 3 times. If the SC value is still 0 after 3 cycles, it is determined that the water pump impeller is jammed by a foreign object or the motor itself is damaged. Fault code EE is displayed, and the entire machine is forcibly shut down for protection.

[0165] In yet another embodiment provided by the present invention, the controller is further configured to:

[0166] When the current water level is full, the operating state is stopped, and the initial water level is not empty, the portable air conditioner is controlled to stop and a full water alarm is output.

[0167] In this specific implementation, when the water pump starts and the rotation speed is less than the no-water speed, some condensate has already accumulated in the water tray. Then, it is determined that the water level is full when the water pump is running, and the compressor is in a stopped state, so no condensate can be generated. This indicates that there is a probability of foreign object interference, so a full water alarm is triggered directly. If foreign object interference occurs, even if the pump has not reached the non-jammed state, the full water alarm will still be triggered. Although it cannot identify all foreign object interference states 100%, this scheme can increase the probability of identifying foreign object interference and avoid water pump malfunctions caused by foreign object interference.

[0168] In yet another embodiment provided by the present invention, the controller is further configured to:

[0169] When the current water level is full, the initial water level is empty, and the operating state is not stopped, calculate the operating time of the compressor.

[0170] When the running time is less than a preset first threshold time, it is determined that there is a foreign object in the water pumping wheel of the water pump, the portable air conditioner is controlled to stop, and the foreign object alarm prompt is output.

[0171] In the specific implementation of this embodiment, please refer to Figure 9 This is another control flow diagram of the controller providing the embodiment of the present invention when performing foreign object alarm judgment, specifically executing the following steps:

[0172] Step S901: After the machine is started, record the starting speed V0 of the water pump.

[0173] Step S902, determine the starting speed V0 ≥ V SK Whether it is valid or not.

[0174] It should be noted that V SK The dry rotation speed is the rotational speed monitored when the water dispenser is dry in the water collection tray; it represents the maximum operating speed of the water dispenser. This can be determined experimentally or through statistical methods.

[0175] If so, proceed to step S903;

[0176] If not, execute other control processes.

[0177] Step S903: Determine the initial water level as a waterless state;

[0178] Step S904: Monitor the operating speed V of the water pump. t .

[0179] Step S905, determine the operating speed V t ≤V SG Whether it is valid or not.

[0180] It should be noted that V SG This refers to the rotational speed of the water pump when it is full of water; the specific speed can be determined through experiments or statistical methods.

[0181] If so, proceed to step S906;

[0182] If not, execute other control processes.

[0183] Step S906: Determine that the current water level is full.

[0184] Step S907: Monitor the operating status of the compressor.

[0185] Step S908: Determine whether the running status is a stopped state.

[0186] If so, execute other control processes.

[0187] If not, proceed to step S909.

[0188] Step S909: Calculate the operating time T of the compressor.

[0189] When calculating the compressor's runtime, the counter starts to increment if the compressor is running, and immediately resets to zero if the compressor stops running.

[0190] Step S910: Determine if runtime T < T TH Whether it is valid or not.

[0191] If so, proceed to step S911;

[0192] If not, execute other control processes.

[0193] It should be noted that, in this embodiment, the first threshold duration T TH It can be set to 180 mins. In other embodiments, the first threshold duration can be set to other values. The first threshold duration can be determined based on the normal operating time of the water receiving tray from a waterless state to a full water state and a preset proportional coefficient to ensure that abnormal interference can be identified.

[0194] Step S911: It is determined that a foreign object has appeared in the water jet of the water pump;

[0195] Step S912: Control the portable air conditioner to stop and output a foreign object alarm.

[0196] When the water level condition is met, the compressor has been running continuously. The initial water level is determined to be in a state of no water, and the compressor has been running for less than 180 minutes. At this time, it is difficult to achieve a full water level in the water tray under normal operation. Therefore, it is determined that the water pumping machine is interfering. It is directly determined that the water pumping impeller of the water pumping motor is being interfered with, and the fault code EE is displayed. The whole machine is forced to shut down for protection.

[0197] In yet another embodiment provided by the present invention, the controller is further configured to:

[0198] When the running time is not less than the first threshold time, the portable air conditioner is controlled to stop and a water full alarm is output.

[0199] In the specific implementation of this embodiment, please refer to Figure 9 In step S910, it is determined that the running time T < T T If the condition is not met, i.e., the result is negative, proceed to step S913.

[0200] Step S913: Control the portable air conditioner to stop and output a water full alarm.

[0201] Specifically, the current water level is full, and the initial water level is empty. That is, the initial water level is empty. After 180 minutes, the air conditioner will run until the water is full. At this time, the air conditioner may be in normal working condition, but the water tray is full. The water full alarm will be output to prevent water from overflowing.

[0202] In yet another embodiment provided by the present invention, the controller is further configured to:

[0203] After the portable air conditioner is powered on, calculate the standby time of the portable air conditioner in standby mode and detect the ambient temperature;

[0204] When the standby time is not less than the preset second threshold time and the ambient temperature is within the preset first temperature range, it is determined that the water receiving tray is in a waterless state, and the rotation speed after the water dispenser is started is read as the waterless rotation speed.

[0205] In the specific implementation of this embodiment, when determining the speed of the water pump without water, the speed value of the water pump in the state without water can be determined by experiment.

[0206] In addition, the operating status of the water dispenser in the portable air conditioner can be combined with real-time monitoring of the waterless rotation speed, specifically:

[0207] When the controller performs waterless speed detection, it specifically executes the following steps:

[0208] Power on the entire machine;

[0209] The standby time t1 is calculated starting from 0;

[0210] Periodically acquire the operating status of the compressor;

[0211] Determine whether the running status is in a working state;

[0212] If not, then t1 = t1 + 1. That is, when the air conditioner compressor is not running, the portable air conditioner is in standby mode during this testing cycle, and the standby time is accumulated.

[0213] Determine if standby time t1 ≥ T th1 Whether it is valid or not.

[0214] If so, then detect the current ambient temperature W;

[0215] Determine the current ambient temperature W ≥ W th1 Whether it is valid or not.

[0216] If so, the water receiving tray is determined to be in a dry state.

[0217] The rotational speed of the water pump after it starts is taken as the waterless rotational speed.

[0218] It should be noted that when the device is in standby mode for an extended period of time, the water in the drip tray will continue to evaporate, especially when the ambient temperature reaches a certain value. After a preset evaporation period, the water in the drip tray will evaporate completely.

[0219] It should be noted that when the standby time is determined to have reached the first time threshold, if the ambient temperature is below the first temperature range, the first time threshold can be extended (i.e., the first time threshold is increased) to continue the time determination. The amount of increase in the first time threshold can be based on the ambient temperature and the first temperature threshold W. th1 The difference is determined by the fact that the lower the temperature, the longer the extension time.

[0220] When the ambient temperature is low, the water tray will naturally evaporate completely after being left for more than 600 minutes. When the machine is turned on again, the water pump motor will run without resistance. That is, by detecting the standby time, under the preset temperature conditions, the water in the water tray is considered to have evaporated completely after a certain standby time, and this is determined to be a waterless state. Without the need for a water level sensor, the machine can accurately identify the waterless speed of the water tray in the waterless state, eliminating the influence of changes in the water pump speed caused by the aging of the water pump or changes in the mass of the water pump wheel during operation on the detection of foreign objects, thus ensuring the accuracy of the waterless speed detection.

[0221] This invention also provides a method for detecting abnormalities in the water dispenser of a portable air conditioner, applicable to a portable air conditioner, the air conditioner comprising:

[0222] The refrigeration circuit circulates the refrigerant sequentially through the compressor, condenser, throttling device, and evaporator;

[0223] A drip tray is used to receive and store the condensate generated during the operation of the portable air conditioner;

[0224] A water pump, configured at a preset position on a water receiving tray, is used to spray water from the water receiving tray to the condenser via a water pumping wheel.

[0225] Controller;

[0226] See Figure 10 This is a flowchart illustrating the abnormal detection method for the water dispenser of a portable air conditioner provided in an embodiment of the present invention. The method includes the following steps:

[0227] Step S1: After the portable air conditioner is turned on, record the starting speed of the water pump when it starts.

[0228] Step S2: Monitor the operating speed of the water pump and the operating status of the compressor in real time.

[0229] Step S3: When the operating speed, the operating status, and the starting speed all meet the preset foreign object determination conditions, control the portable air conditioner to stop and output a foreign object alarm prompt.

[0230] It should be noted that the abnormal detection method for the water dispenser of a portable air conditioner provided in this embodiment of the invention is identical to all the process steps executed by the controller of an air conditioner in the above embodiment. The working principles and beneficial effects of the two are one-to-one, so they will not be described again.

[0231] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0232] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A portable air conditioner, characterized in that, include: The refrigeration circuit circulates the refrigerant sequentially through the compressor, condenser, throttling device, and evaporator; A drip tray is used to receive and store the condensate generated during the operation of the portable air conditioner; A water pump, configured at a preset position on a water receiving tray, is used to spray water from the water receiving tray to the condenser via a water pumping wheel. The controller is configured as follows: After the portable air conditioner is turned on and running, the starting speed of the water pump is recorded. The operating speed of the water pump and the operating status of the compressor are monitored in real time. When the operating speed, the operating status, and the starting speed all meet the preset foreign object detection conditions, the portable air conditioner is controlled to stop and a foreign object alarm is output.

2. The air conditioner as described in claim 1, characterized in that, The controller is also configured to: The initial water level at startup is determined based on the aforementioned startup speed. The current water level of the water receiving tray is determined based on the operating speed. Based on the current water level, the initial water level, and the operating status, determine whether the foreign object detection conditions are met.

3. The air conditioner as described in claim 2, characterized in that, The controller is also configured to: When the starting speed is not less than the preset waterless speed, the initial water level is determined to be in a waterless state. When the operating speed is not greater than the preset full water speed, the current water level is determined to be in a full water state.

4. The air conditioner as described in claim 2, characterized in that, The controller is also configured to: When the current water level is full, the operating state is stopped, and the initial water level is empty, it is determined that the operating speed, the operating state, and the starting speed all meet the foreign object determination conditions.

5. The air conditioner as described in claim 1, characterized in that, The controller is also configured to: When the operating speed is less than the preset lower limit speed, the water pump is subjected to a preset number of start-stop cycles with preset operating intervals and stop intervals, and then the current speed of the water pump is detected again. When the current rotational speed is less than the lower limit rotational speed, it is determined that the water pump impeller is jammed by a foreign object, the portable air conditioner is controlled to stop, and a foreign object alarm is output.

6. The portable air conditioner as described in claim 2, characterized in that, The controller is also configured to: When the current water level is full, the operating state is stopped, and the initial water level is not empty, the portable air conditioner is controlled to stop and a full water alarm is output.

7. The portable air conditioner as described in claim 2, characterized in that, The controller is also configured to: When the current water level is full, the initial water level is empty, and the operating state is not stopped, calculate the operating time of the compressor. When the running time is less than a preset first threshold time, it is determined that there is a foreign object in the water pumping wheel of the water pump, the portable air conditioner is controlled to stop, and the foreign object alarm prompt is output.

8. The portable air conditioner as described in claim 7, characterized in that, The controller is also configured to: When the running time is not less than the first threshold time, the portable air conditioner is controlled to stop and a water full alarm is output.

9. The portable air conditioner as described in claim 3, characterized in that, The controller is also configured to: After the portable air conditioner is powered on, calculate the standby time of the portable air conditioner in standby mode and detect the ambient temperature; When the standby time is not less than the preset second threshold time and the ambient temperature is within the preset first temperature range, it is determined that the water receiving tray is in a waterless state, and the rotation speed after the water dispenser is started is read as the waterless rotation speed.

10. A method for detecting abnormalities in the water dispenser of a portable air conditioner, characterized in that, The portable air conditioner includes: The refrigeration circuit circulates the refrigerant sequentially through the compressor, condenser, throttling device, and evaporator; A drip tray is used to receive and store the condensate generated during the operation of the portable air conditioner; A water pump, configured at a preset position on a water receiving tray, is used to spray water from the water receiving tray to the condenser via a water pumping wheel. Controller; The method includes: After the portable air conditioner is turned on and running, the starting speed of the water pump is recorded. The operating speed of the water pump and the operating status of the compressor are monitored in real time. When the operating speed, the operating status, and the starting speed all meet the preset foreign object detection conditions, the portable air conditioner is controlled to stop and a foreign object alarm is output.

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