home appliance

Abstract

The application discloses a kind of household appliances, including shell, outlet is formed on shell, air duct is formed in shell and is communicated with outlet;Fan, fan includes fan blade, fan is used to drive the air in air duct to be delivered to outlet;Fan, for driving fan rotation;State detection module, for detecting the outflow state parameter reflecting fan;Controller is connected with state detection module, and controller is configured as: in the case where receiving normal power-on operation instruction, the input power and outflow state parameter when fan is operated at target rotational speed are acquired;According to input power and outflow state parameter, the installation direction of fan blade is determined.The household appliance detects the installation direction of fan blade by combining the input power and outflow state parameter of fan, effectively improves the accuracy of fan blade installation direction detection.

Description

Technical Field

[0001] This invention relates to the field of home appliance technology, and in particular to a home appliance. Background Technology

[0002] In related technologies, the installation direction of air conditioner fan blades directly affects air delivery efficiency, noise level, and energy consumption. If the fan blades are installed backwards, it can lead to problems such as reduced airflow, abnormal vibration causing noise, abnormal motor load, and reduced energy efficiency ratio. Currently, the problem of reversed fan blade installation can be solved by using photoelectric sensors to detect notches on the edge of the fan blades, judging fan blade abnormalities by motor current fluctuations, and image recognition technology. However, all of these methods require additional circuitry or devices.

[0003] Existing technologies can determine the installation direction of fan blades using the current single sampleable parameter power without increasing costs, but this determination method has a high error rate. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a household appliance that effectively improves the accuracy of fan blade installation direction detection by combining the input power and airflow status parameters of the fan.

[0005] A first aspect of the present invention provides a household appliance, comprising: a housing having an air outlet formed thereon, and an air duct communicating with the air outlet formed inside the housing; a fan including fan blades, the fan being used to drive air in the air duct to be delivered to the air outlet; a blower for driving the fan to rotate; a status detection module for detecting air outlet status parameters reflecting the blower; and a controller connected to the status detection module, the controller being configured to: upon receiving a normal power-on operation command, acquire the input power and air outlet status parameters of the blower when it is running at a target speed; and determine the installation direction of the fan blades based on the input power and the air outlet status parameters.

[0006] According to the embodiments of the present invention, the installation direction of the fan blades is determined by controlling the fan to run at a target speed and obtaining the input power and air outlet status parameters of the fan. When the installation direction of the fan blades cannot be determined based on the input power of the fan, the installation direction of the fan blades is further determined by combining the air outlet status parameters, thereby effectively improving the accuracy of the fan blade installation direction detection.

[0007] In some embodiments, the air outlet status parameters include one or more of the indoor unit coil temperature of the home appliance and the air outlet volume of the fan.

[0008] The above technical solution has the following advantages or beneficial effects: the indoor unit coil temperature and the air volume of the fan can both reflect the air outlet status of the fan, and thus be used to detect the installation direction of the fan blades.

[0009] In some embodiments, for obtaining the input power and outlet air status parameters of the fan when it is running at a target speed, the controller is specifically configured to: obtain the first input power and the first outlet air status parameters of the fan when it is running at a target speed in forward rotation; and obtain the second input power and the second outlet air status parameters of the fan when it is running at a target speed in reverse rotation.

[0010] The above technical solution has the following advantages or beneficial effects: by controlling the fan to run at the target speed in both forward and reverse rotation states, and collecting input power and air outlet status parameters, the installation direction of the fan blades can be accurately detected.

[0011] In some embodiments, the home appliance is an air conditioner. For determining the installation direction of the fan blades based on the input power and the air outlet state parameters, the controller is specifically configured to: determine that the fan blades are installed in the opposite direction when it is determined that the fan meets the power difference condition based on the first input power and the second input power, and the fan meets the air volume difference condition based on the first air outlet state parameters and the second air outlet state parameters.

[0012] The above technical solution has the following advantages or beneficial effects: the installation direction of the fan blades is determined by combining the input power and outlet air condition parameters of the fan.

[0013] In some embodiments, the power difference condition is that the ratio of the second input power to the first input power is higher than a first preset threshold.

[0014] The above technical solution has the following advantages or beneficial effects: it determines whether the fan blades are installed backwards based on the ratio of the second input power to the first input power.

[0015] In some embodiments, the air volume difference condition includes any one of the following: in cooling mode, the difference between the second air volume state parameter and the first air volume state parameter is higher than a first preset difference; in heating mode, the difference between the first air volume state parameter and the second air volume state parameter is higher than a first preset difference.

[0016] The above technical solution has the following advantages or beneficial effects: by comparing the first air outlet state parameters and the second air outlet state parameters in cooling mode or heating mode, the installation direction of the fan blades can be determined.

[0017] In some embodiments, before determining that the fan meets the power difference condition based on the first input power and the second input power, and before determining that the fan meets the air volume difference condition based on the first air outlet state parameter and the second air outlet state parameter, the controller is further configured to: determine that the ratio of the second input power to the first input power is lower than a second preset threshold, wherein the second preset threshold is greater than the first preset threshold.

[0018] The above technical solution has the following advantages or beneficial effects: when the ratio of the second input power to the first input power is lower than the second preset threshold, the installation direction of the fan blades is determined in combination with the air outlet state parameters.

[0019] In some embodiments, the controller is further configured to: determine that the installation direction of the fan blades is reversed if the ratio of the second input power to the first input power is higher than a second preset threshold.

[0020] The above technical solution has the following advantages or beneficial effects: when the ratio of the second input power to the first input power is higher than the second preset threshold, the installation direction of the fan blade is determined to be reversed.

[0021] In some embodiments, a damper for opening or closing the air outlet is provided at the air outlet, and the controller is further configured to control the opening angle of the damper to the maximum opening angle before acquiring the input power and air outlet status parameters of the fan when it is running at the target speed.

[0022] The above technical solution has the following advantages or beneficial effects: by controlling the opening angle of the damper to the maximum opening angle, the air volume of the fan can reach the maximum air volume at the target speed, which makes it easy to compare the input power and air output parameters of the fan in the forward and reverse rotation states.

[0023] In some embodiments, the controller is further configured to: upon receiving a complete machine inspection operation instruction, acquire the current rotational speed value and the current input power value of the fan during a preset operating time; determine a standard input power value based on the current rotational speed value; and determine the installation direction of the fan blades based on the current input power value and the standard input power value.

[0024] The above technical solution has the following advantages or beneficial effects: by comparing the current input power value of the fan when it has been running for a preset time under the whole machine inspection mode with the standard input power value determined based on the current speed value, the installation direction of the fan blades can be determined.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural block diagram of a household appliance according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the casing of a household appliance according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the casing of another household appliance according to an embodiment of the present invention; Figure 4 This is a schematic diagram of an air outlet equipped with an electric auxiliary heating function according to an embodiment of the present invention; Figure 5 This is a schematic diagram of an air outlet without electric auxiliary heating function according to an embodiment of the present invention; Figure 6 This is a flowchart of a home appliance controller configuration according to an embodiment of the present invention; Figure 7 This is a schematic diagram of a household appliance equipped with a damper according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a household appliance without a damper according to an embodiment of the present invention; Figure 9 This is a flowchart of the configuration of a home appliance controller according to another embodiment of the present invention; Figure 10 This is a flowchart of a control method for a household appliance according to an embodiment of the present invention.

[0027] Figure label: 10 home appliances; 1. Housing; 2. Fan; 3. Status detection module; 4. Blower; 5. Controller. Detailed Implementation

[0028] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0029] When installing fan blades, manufacturers of home appliances may install them backwards. Alternatively, when a home appliance malfunctions while in use at a user's home, and a repair engineer needs to disconnect the power to replace the fan blades or disassemble and reassemble the fan blades for other reasons, the fan blades may be installed backwards during the installation process.

[0030] The installation direction of fan blades in home appliances directly affects airflow efficiency, noise levels, and energy consumption. Fan blades in home appliances can be cross-flow, centrifugal, or axial fans. Inverted fan blades can reduce airflow by 20%-30%; they can also cause abnormal vibration, leading to a 5-10 dB increase in noise; furthermore, inverted fan blades can cause abnormal motor load and a decrease in the energy efficiency ratio (EER).

[0031] Traditional inspection methods rely on manual visual inspection or simple tooling positioning. However, manual inspection is inefficient, with a single-piece inspection time typically exceeding 30 seconds, and is susceptible to fatigue, leading to a missed detection rate greater than 3%. Tooling positioning methods can only detect fan blade installation position deviations and cannot identify the fan blade installation direction. Currently, methods to address fan blade reversal in household appliances include using photoelectric sensors to detect notches on the fan blade edges, but this method requires high-precision sensor alignment and cannot distinguish between reversal and angular misalignment; fan blade abnormalities can also be detected through motor current fluctuations, but the sensitivity to current changes caused by reversal is insufficient, and the error is greater than 15%; image recognition technology can also be used, but this method requires industrial cameras and complex algorithms, resulting in high costs, for example, a single system costing more than $5000.

[0032] To address the aforementioned problems, a first aspect of this invention proposes a household appliance that detects the installation direction of the fan blades by combining the input power and airflow status parameters of the fan, thereby effectively improving the accuracy of fan blade installation direction detection.

[0033] like Figure 1 As shown, the household appliance 10 according to an embodiment of the present invention includes a housing 1, a fan 2, a status detection module 3, a blower 4, and a controller 5.

[0034] Among them, reference Figure 2 and Figure 3 As shown, an air outlet is formed on the casing, and an air duct communicating with the air outlet is formed inside the casing; the fan includes fan blades and is used to drive the air in the air duct to be delivered to the air outlet; the fan is used to drive the fan to rotate; the status detection module is used to detect and reflect the air outlet status parameters of the fan; the controller is connected to the status detection module.

[0035] refer to Figure 4 and Figure 5 As shown, the air outlet can be equipped with an electric auxiliary heater. When the outside temperature is too low, the electric auxiliary heater will automatically start, directly converting electrical energy into heat energy to quickly increase the air outlet temperature.

[0036] Based on the architecture of the aforementioned home appliances, and referring to Figure 6 As shown, the controller is configured to execute steps S1-S2, and the specific steps are as follows.

[0037] Step S1: Upon receiving a normal power-on operation command, acquire the input power and outlet air status parameters of the fan when it is running at the target speed.

[0038] The normal power-on operation command can be understood as the command issued by the user to control the operation of the home appliance when the power is turned on. The air outlet status parameters can be understood as the parameters of the state in which the fan drives the air in the air duct to deliver the air to the air outlet when the fan is running, such as wind speed, air volume, air pressure, etc.

[0039] Specifically, after the user connects the power to the home appliance, the controller receives the normal power-on operation command, controls the fan to run at the target speed, and obtains the input power and air outlet status parameters when the fan is running at the target speed.

[0040] For example, users can set different fan speed levels for home appliances via remote control or mobile app. Each fan speed level corresponds to a different target speed range, where the target speed is a specific RPM value, and the fan speed level is a grading standard that divides the target speed into several intervals. The controller converts the user-set fan speed level into the corresponding target speed to control the fan operation. For instance, if the home appliance has three fan speed levels—low, medium, and high—then each fan speed level corresponds to a target speed range. When the fan is running at a higher target speed, the input power of the fan varies significantly depending on the installation direction of the fan blades. However, if the target speed of the fan is too low, the differences in the fan's input power and airflow parameters are not significant regardless of the installation direction of the fan blades. Therefore, when the user sets the fan speed of the home appliance to low, this application can force the fan to operate at the target speed corresponding to medium or high fan speed; if the user sets the fan speed to medium or high, the fan will be controlled to operate at the target speed corresponding to the current fan speed. Specifically, when the fan is running stably, current and voltage can be detected in real time by setting current and voltage sensors. The controller collects the sensor data in real time, calculates the input power of the fan based on the sensor data, and obtains the air outlet status parameters through the status detection module.

[0041] Step S2: Determine the installation direction of the fan blades based on the input power and air outlet status parameters.

[0042] Since the input power and output air parameters of the fan vary greatly when the fan blades are installed in different directions, the installation direction of the fan blades can be determined based on the input power and output air parameters.

[0043] For example, after receiving a normal power-on command, the controller can control the fan to run forward at the target speed, acquiring input power and airflow status parameters. Then, it can control the fan to run in reverse at the same target speed, acquiring the same input power and airflow status parameters again to simulate different fan blade installation directions. The differences in input power and airflow status parameters between the forward and reverse rotations are then compared to determine the fan blade installation direction.

[0044] Compared to existing technologies that determine the fan blade installation direction solely based on input power, this method has limitations. The installation direction can only be determined when the difference in input power between forward and reverse rotation of the fan is sufficiently significant; if the power difference is small, the installation direction cannot be effectively determined, resulting in a large error. In contrast, this application combines input power and outlet airflow parameters to determine the fan blade installation direction. When the installation direction cannot be determined based on input power alone, it can be further accurately determined by combining outlet airflow parameters.

[0045] According to the embodiments of the present invention, the installation direction of the fan blades is determined by controlling the fan to run at a target speed and obtaining the input power and air outlet status parameters of the fan. When the installation direction of the fan blades cannot be determined based on the input power of the fan, the installation direction of the fan blades is further determined by combining the air outlet status parameters, thereby effectively improving the accuracy of the fan blade installation direction detection.

[0046] In some embodiments, the air outlet status parameters include one or more of the indoor unit coil temperature of the home appliance and the air outlet volume of the fan.

[0047] The indoor unit coil, or heat exchanger, such as a condenser or evaporator, is located inside the appliance. It consists of copper tubes and aluminum fins. Refrigerant circulates within the coil, which facilitates heat exchange between the refrigerant and the air, thus cooling or heating the air. The indoor unit coil temperature is the surface temperature of the heat exchanger. Its temperature can be monitored in real time using a temperature sensor installed on the indoor unit coil.

[0048] Specifically, due to the different installation directions of the fan blades, the air volume of the air in the fan drive duct that reaches the air outlet varies greatly. Therefore, the air outlet status parameters can include the air volume of the fan.

[0049] However, when the air inlet filter is clogged, the damper opening angle is too small, or the air outlet duct is too long, the difference in airflow from the fan is small depending on the fan blade installation direction. Therefore, the fan blade installation direction cannot be determined by the fan's airflow. Since different fan blade installation directions lead to significant differences in indoor unit coil temperature, when the fan's airflow cannot determine the fan blade installation direction, the indoor unit coil temperature can be used to determine it. Therefore, the airflow status parameter can include the indoor unit coil temperature of the appliance.

[0050] In some embodiments, for acquiring the input power and outlet air status parameters of the fan when it is running at the target speed, the controller is specifically configured to: acquire the first input power and the first outlet air status parameters of the fan when it is running at the target speed in the forward rotation state; and acquire the second input power and the second outlet air status parameters of the fan when it is running at the target speed in the reverse rotation state.

[0051] For example, the controller can first control the fan to run at the target speed in forward rotation. If the outdoor compressor starts, then when the fan and outdoor compressor are running stably, the controller collects and records the current input power of the fan (i.e., the first input power) and the current indoor unit coil temperature (i.e., the first air outlet status parameter). If the outdoor compressor does not start, then when the fan is running stably, the controller collects and records the current input power of the fan (i.e., the first input power). Then, the controller controls the fan to run at the target speed in reverse rotation. If the outdoor compressor starts, then when the fan and outdoor compressor are running stably, the controller collects and records the current input power of the fan (i.e., the second input power) and the current indoor unit coil temperature (i.e., the second air outlet status parameter). If the outdoor compressor does not start, then when the fan is running stably, the controller collects and records the current input power of the fan (i.e., the second input power). After collecting the first input power, the first air outlet status parameter, the second input power, and the second air outlet status parameter, the controller controls the fan to return to forward rotation.

[0052] In some embodiments, the home appliance is an air conditioner. For determining the installation direction of the fan blades based on the input power and the air outlet state parameters, the controller is specifically configured to: determine the installation direction of the fan blades to be reversed when it is determined that the fan meets the power difference condition based on the first input power and the second input power, and the fan meets the air volume difference condition based on the first air outlet state parameters and the second air outlet state parameters.

[0053] Specifically, if the fan only meets the power difference condition, the installation direction of the fan blades cannot be determined. In this case, it is necessary to combine the first and second air outlet state parameters to determine whether the fan meets the air volume difference condition. When the fan meets both the power difference condition and the air volume difference condition, the installation direction of the fan blades can be determined to be reversed.

[0054] In some embodiments, the power difference condition is that the ratio of the second input power to the first input power is higher than a first preset threshold.

[0055] The first preset threshold can be understood as a value pre-set based on actual conditions. Based on this first preset threshold, if the value is exceeded, it indicates that the power difference between the forward and reverse rotation of the fan is relatively significant, and the installation direction of the fan blades may be reversed. For example, the first preset threshold can be 1.1.

[0056] Since the power difference between the fan running at the target speed in forward rotation and the fan running at the target speed in reverse rotation is significant—for example, the power difference between the fan running at the target speed in forward rotation and the fan running at the target speed in reverse rotation is more than 50%—the installation direction of the fan blades can be determined by combining the second input power with the first input power.

[0057] Specifically, if the ratio of the second input power to the first input power is higher than the first preset threshold, that is, if the input power of the fan in the forward rotation state is significantly different from the input power of the fan in the reverse rotation state, it indicates that the installation direction of the fan may be reversed. However, the power difference at this time is not enough to directly determine that the fan blades are installed in reverse. It is necessary to further combine the first air outlet state parameters and the second air outlet state parameters to determine the installation direction of the fan blades.

[0058] In some embodiments, the air volume difference condition includes any one of the following: in cooling mode, the difference between the second air volume state parameter and the first air volume state parameter is higher than a first preset difference; in heating mode, the difference between the first air volume state parameter and the second air volume state parameter is higher than a first preset difference.

[0059] When the air outlet status parameter is the indoor unit coil temperature, the first preset difference can be set according to the actual test value without restriction. For example, the first preset difference can be 3℃.

[0060] Specifically, in cooling mode, the outdoor compressor of the home appliance starts, the indoor unit coil absorbs heat, and the indoor unit coil temperature rises. First, the controller controls the fan to run at the target speed in forward rotation. When the fan and outdoor compressor are running stably, the current indoor unit coil temperature, i.e., the first air outlet state parameter, is recorded. Then, the controller controls the fan to run at the target speed in reverse rotation. When the fan and outdoor compressor are running stably, the current indoor unit coil temperature, i.e., the second air outlet state parameter, is recorded. If the difference between the second air outlet state parameter and the first air outlet state parameter is higher than the first preset difference, it means that the indoor unit coil temperature when the fan is running at the target speed in reverse rotation is higher than the indoor unit coil temperature when the fan is running at the target speed in forward rotation. In other words, the indoor unit coil absorbs more heat in reverse rotation than in forward rotation. Since the more heat the indoor unit coil absorbs in cooling mode, the greater the airflow from the fan, the greater the airflow from the fan in reverse rotation. In this case, the fan blades are installed in the opposite direction.

[0061] Specifically, in heating mode, the outdoor compressor starts, the indoor unit coil releases heat, and the indoor unit coil temperature drops. First, the controller controls the fan to run at the target speed in forward rotation. When the fan and outdoor compressor are running stably, the current indoor unit coil temperature, i.e., the first air outlet state parameter, is recorded. Then, the controller controls the fan to run at the target speed in reverse rotation. When the fan and outdoor compressor are running stably, the current indoor unit coil temperature, i.e., the second air outlet state parameter, is recorded. If the difference between the first and second air outlet state parameters is higher than a preset difference, it indicates that the indoor unit coil temperature when the fan is running at the target speed in forward rotation is higher than the indoor unit coil temperature when the fan is running at the target speed in reverse rotation. In other words, the heat released by the indoor unit coil in forward rotation is less than the heat released in reverse rotation. Since the more heat released by the indoor unit coil in heating mode, the greater the airflow from the fan, the greater the airflow in reverse rotation, where the fan blades are installed in the opposite direction.

[0062] In some embodiments, before determining that the fan meets the power difference condition based on the first input power and the second input power, and before determining that the fan meets the air volume difference condition based on the first air outlet state parameter and the second air outlet state parameter, the controller is further configured to: determine that the ratio of the second input power to the first input power is lower than a second preset threshold, wherein the second preset threshold is greater than the first preset threshold.

[0063] The second preset threshold can be understood as a value pre-set based on actual conditions. Based on this second preset threshold, if the value is exceeded, it indicates that the power difference between the forward and reverse rotation of the fan is significant, and it can be determined that the installation direction of the fan blades is reversed. For example, the second preset threshold can be 1.5.

[0064] Specifically, if the ratio of the second input power to the first input power is lower than the second preset threshold, it is not possible to directly confirm that the installation direction of the fan blades is reversed. In this case, it is necessary to combine the first air outlet state parameter and the second air outlet state parameter to confirm the installation direction of the fan blades.

[0065] In some embodiments, the controller is further configured to determine that the installation direction of the fan blades is reverse if the ratio of the second input power to the first input power is higher than a second preset threshold.

[0066] Specifically, if the ratio of the second input power to the first input power is higher than the second preset threshold, it indicates that the difference in input power between the forward and reverse rotation states of the fan is significant. In this case, the installation direction of the fan blades can be directly determined to be reverse.

[0067] In some embodiments, a damper for opening or closing the air outlet is provided at the air outlet, and the controller is further configured to control the opening angle of the damper to the maximum opening angle before acquiring the input power and air outlet status parameters when the fan is running at the target speed.

[0068] For details, please refer to Figure 7 As shown, for household appliances equipped with dampers, open the damper to its maximum opening angle; refer to... Figure 8 As shown, for household appliances without dampers, they operate in an open state because they are not connected to the air duct. Controlling the damper's opening angle to the maximum opening angle allows the fan's output airflow to reach the maximum output airflow at the target speed. This facilitates the collection and comparison of the input power and output airflow parameters of the fan at the target speed, thereby determining the installation direction of the fan blades.

[0069] In some embodiments, reference Figure 9 As shown, the controller is specifically configured to execute steps S3-S5, and the specific steps are as follows.

[0070] Step S3: Upon receiving the complete machine inspection operation instruction, obtain the current speed value and current input power value of the fan during the preset operating time.

[0071] Step S4: Determine the standard input power value based on the current speed value.

[0072] Step S5: Determine the installation direction of the fan blades based on the current input power value and the standard input power value.

[0073] Among them, the whole machine commercial inspection operation instruction can be understood as the instruction to control the operation of the fan to carry out the whole machine factory inspection before the home appliance is taken off the production line at the manufacturer, so as to check whether the home appliance can operate normally and whether each function is normal.

[0074] The preset duration can be understood as a value pre-set based on actual conditions. When the fan runs for the preset duration, it can be considered that the fan has reached a stable operating state. For example, the preset duration can be set to 20 seconds.

[0075] If the controller receives the whole machine inspection operation command, it means that the home appliance is on the production line and is undergoing the final inspection process before leaving the production line. At this time, the home appliance enters the whole machine inspection mode to quickly check whether the home appliance can operate normally and whether each function is normal. The quick detection time of the whole machine inspection mode is about 30 seconds.

[0076] Specifically, after the home appliance enters the whole-machine inspection mode, the controller controls the fan to run at a higher target speed to maximize the fan's airflow and input power. After the fan runs in the whole-machine inspection mode for a preset period, the fan speed and input power values ​​tend to stabilize. At this point, the current fan speed and current input power values ​​can be collected. Since the home appliance's controller program has a pre-stored preset relationship between the input power value and speed value in the whole-machine inspection mode when the fan blades are correctly installed, the standard input power value corresponding to the current speed value is calculated using the preset relationship. Then, the current input power value and the standard input power value are compared. If the ratio of the current input power value to the standard input power value is greater than a third preset threshold, it indicates that the fan blades are installed backwards. The home appliance can display a fault code on the screen, sound a buzzer, and prompt the user via a mobile app that the fan blades are installed in the wrong direction. The third preset threshold can be set based on actual test values ​​and is not limited. For example, the third preset threshold can be 1.5.

[0077] It should be noted that, since the air ducts of home appliances are free of dirt and blockages, and the opening angles of the dampers are consistent and all are at the position of maximum airflow, the input power of the fans of the home appliances at the same target speed is basically the same. Therefore, in the whole-machine inspection mode, the installation direction of the fan blades can be determined by comparing the current input power value with the standard input power value.

[0078] Based on the above, this application can quickly and accurately determine the installation direction of the fan blades during the factory testing process of the entire machine, and can also determine the installation direction of the fan blades when the home appliance is powered on normally. Specifically, the fan blade installation direction is only checked once after the home appliance is powered on, without affecting normal user operation. The fan blade installation direction detection method of this application basically covers various user scenarios.

[0079] like Figure 10 As shown, the control method for home appliances according to an embodiment of the present invention may include steps S6-S25, and the specific steps are as follows.

[0080] Step S6, Begin.

[0081] Step S7: After power-on initialization, enter normal control mode.

[0082] Step S8: Determine whether a complete machine inspection operation command has been received. If yes, proceed to step S9; otherwise, proceed to step S10.

[0083] Step S9: Obtain the current speed value and current input power value of the fan during the preset operating time.

[0084] Step S10: Obtain the first input power and the first air outlet status parameter T1.

[0085] Step S11: Determine the standard input power value based on the current speed value.

[0086] Step S12: Determine if the ratio of the current input power value to the standard input power value is greater than the third preset threshold. If so, proceed to step S13; otherwise, proceed to step S25.

[0087] Step S13: Reverse the fan blades.

[0088] Step S14, fan blades installed backwards prompt.

[0089] Step S15: Obtain the second input power and the second air outlet status parameter T2.

[0090] Step S16: Determine whether the ratio of the second input power to the first input power is greater than the second preset threshold. If yes, proceed to step S20; otherwise, proceed to step S17, step S18, or step S19.

[0091] Step S17: Run the cooling mode and the compressor is running.

[0092] Step S18: Run the heating mode and start the compressor.

[0093] Step S19, other operating modes.

[0094] Step S20: Reverse the fan blades.

[0095] Step S21: Determine whether T2-T1 is greater than the first preset difference. If yes, proceed to step S23; otherwise, proceed to step S25.

[0096] Step S22: Determine whether T1-T2 is greater than the first preset difference. If yes, proceed to step S24; otherwise, proceed to step S25.

[0097] Step S23: Reverse the fan blades.

[0098] Step S24: Reverse the fan blades.

[0099] Step S25, End.

[0100] Furthermore, the home appliances covered by this application can include residential wall-mounted air conditioners, floor-standing air conditioners, and commercial ducted air conditioners, floor-standing air conditioners, ceiling-mounted air conditioners, etc. Additionally, the home appliances covered by this application are applicable to scenarios such as split-type air conditioners, central air conditioners, and vehicle air conditioners. Moreover, in scenarios such as fresh air control systems, air purifiers, and range hoods, the installation direction of the fan blades can be determined by combining the input power and airflow parameters of the fan.

[0101] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0102] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A household appliance, characterized in that, include: A housing, on which an air outlet is formed, and inside which an air duct is formed that communicates with the air outlet; A fan, the fan including blades, the fan being used to drive air in the air duct to deliver it to the air outlet; A fan is used to drive the fan to rotate; The status detection module is used to detect the air outlet status parameters that reflect the fan. The controller, connected to the state detection module, is configured to: Upon receiving a normal power-on operation command, the system acquires the input power and air outlet status parameters of the fan when it is running at the target speed. The air outlet status parameters are at least one of the indoor unit coil temperature of the home appliance and the air outlet volume of the fan. The installation direction of the fan blades is determined based on the input power and the air outlet status parameters. Specifically, the installation direction of the fan blades is determined based on the input power, the indoor unit coil temperature of the home appliance, and / or the air outlet volume of the fan.

2. The household appliance according to claim 1, characterized in that, The controller is specifically configured to acquire the input power and outlet air status parameters of the fan when it is running at the target speed as follows: The first input power and the first outlet air state parameters of the fan when it is running at the target speed in the forward rotation state are obtained; The second input power and the second outlet air state parameters are obtained when the fan is running at the target speed in reverse state.

3. The household appliance according to claim 2, characterized in that, The household appliance is an air conditioner. To determine the installation direction of the fan blades based on the input power and the airflow status parameters, the controller is specifically configured as follows: If the fan meets the power difference condition based on the first input power and the second input power, and meets the air volume difference condition based on the first air outlet state parameter and the second air outlet state parameter, then the installation direction of the fan blades is determined to be reversed.

4. The household appliance according to claim 3, characterized in that, The power difference condition is that the ratio of the second input power to the first input power is higher than a first preset threshold.

5. The household appliance according to claim 3, characterized in that, The air volume difference condition includes any one of the following: In cooling mode, the difference between the second air outlet state parameter and the first air outlet state parameter is higher than the first preset difference. In heating mode, the difference between the first air outlet state parameter and the second air outlet state parameter is higher than the first preset difference.

6. The household appliance according to claim 4, characterized in that, Before determining that the fan meets the power difference condition based on the first input power and the second input power, and before determining that the fan meets the air volume difference condition based on the first air outlet state parameter and the second air outlet state parameter, the controller is further configured to: It is determined that the ratio of the second input power to the first input power is lower than a second preset threshold, wherein the second preset threshold is greater than the first preset threshold.

7. The household appliance according to claim 6, characterized in that, The controller is also configured to: If the ratio of the second input power to the first input power is higher than the second preset threshold, then the installation direction of the fan blades is determined to be reversed.

8. The household appliance according to claim 1, characterized in that, The air outlet is provided with a damper for opening or closing the air outlet, and the controller is further configured to: Before acquiring the input power and outlet air status parameters of the fan when it is running at the target speed, the opening angle of the damper is controlled to the maximum opening angle.

9. The household appliance according to claim 1, characterized in that, The controller is also configured to: Upon receiving the complete machine inspection operation instruction, the current speed value and current input power value of the fan are obtained when the fan has been running for a preset time. Determine the standard input power value based on the current rotational speed value; The installation direction of the fan blades is determined based on the current input power value and the standard input power value.

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