Steam washing control method for washing equipment and washing equipment

Abstract

The invention discloses a steam washing control method for washing equipment and the washing equipment, and the method comprises the steps: weighing a dry load to be washed before steam washing is executed, and determining the initial water inflow based on the weighing; after water is fed according to the initial water inlet amount, the inner barrel is controlled to rotate forwards and backwards to enable the load to be washed to fully absorb water, the loads made of different materials are different in water absorption performance, water absorption speed and water amount, and therefore the water level frequency difference values obtained after forward and backward rotation are different. Therefore, the standard water level of the to-be-washed load in the steam washing stage can be determined according to the water level frequency difference value, and the standard water level ensures that the heating pipe is not burnt dry on one hand, and ensures that the amount of water heated in the steam washing stage is small on the other hand; when the steam washing procedure is executed, the water level is kept at the standard water level through dynamic water supplementing, and the effects that enough steam can be generated for steam washing, a small amount of water can be kept, and meanwhile dry burning of the heating pipe can be avoided are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of clothes processing equipment, and in particular relates to a steam washing control method for a washing device and the washing device. BACKGROUND

[0002] The background of the single-washing drum steam washing technology stems from the continuous improvement of people's requirements for washing effect and hygiene of household washing machines. Although the traditional water washing method can clean clothes, it has certain limitations in combating bacteria, deep stains and the care of sensitive fabrics.

[0003] The steam washing technology utilizes the high-temperature characteristics of water vapor to generate steam with less water, which not only effectively removes stains but also kills bacteria, viruses and allergens during the cleaning process. This technology requires high control of temperature and humidity to ensure that steam is evenly distributed in the drum and penetrates into every corner of the clothes.

[0004] There are two existing steam washing methods: one is to increase the steam generator to quickly generate high-temperature steam, which has high heating efficiency and controllable steam quantity, but the cost is relatively high; the other is to use the heating pipe of the washing machine to heat the washing water to generate steam. Although this method does not increase the cost of the washing machine as a whole, it has the following problems: to avoid dry burning of the heating pipe, the water inflow is relatively large, resulting in a relatively slow heating speed and excessively wet clothes. SUMMARY

[0005] To overcome the above-mentioned problems of using the existing heating pipe of the washing machine to implement the steam washing function, the present application proposes a steam washing control method for a washing device and the washing device. The water absorption rate of the load in the drum is determined by weighing and water absorption, and a standard water level is determined to avoid dry burning of the heating pipe. During the execution of steam washing, the water level is maintained at the standard water level, ensuring sufficient steam generation while minimizing water usage, thereby avoiding dry burning of the heating pipe and excessively wet clothes.

[0006] The present application is implemented by using the following technical solutions: A steam washing control method for a washing device is proposed, which is applied to a washing device. The washing device includes: An outer drum, which is provided with a heater at the inner bottom; An inner drum, which is installed in the outer drum and is used to hold the load to be washed; A water level sensor, which is installed at the inner bottom of the outer drum and is used to detect the washing water level; A water inlet pipeline, which is provided with a water inlet valve and is used to supply water to the outer drum to implement the washing function; The control method includes: Weighing and determining initial water inflow: after the steam washing procedure is started, the weight information of the load to be washed is obtained, and the initial water inflow is determined based on the weight information; Determining standard water level: water is added with the initial water inflow; after the water addition is completed, the inner drum is controlled to rotate forward and backward; the water level frequency difference before and after the forward and backward rotation is obtained, and the standard water level in the steam washing stage is determined based on the water level frequency difference; Performing steam washing: the heating pipe is started to heat the water and maintain the set evaporation temperature; during this period, the water level is maintained at the standard water level; Cooling: the heating pipe is turned off, and the steam washing is ended when the temperature in the drum reaches the end condition.

[0007] Compared with the prior art, the steam washing control method for the washing equipment has the following advantages and positive effects: before the steam washing is performed, the dry load to be washed is weighed, and different initial water inflows are determined for different weights of the load to be washed; after the water is added with the initial water inflow, the inner drum is controlled to rotate forward and backward to allow the load to be washed to fully absorb water; the water absorption performance of the load of different materials is different, and the water absorption speed and water amount are also different; therefore, the water absorption speed and water amount of the load to be washed of the same weight but of different materials are different after the forward and backward rotation, and the water level frequency difference before and after the forward and backward rotation is also different; if the water level frequency difference is large, water needs to be added to increase the water level to be above the heating pipe; if the water level frequency difference is small, water does not need to be added; therefore, the standard water level of the load to be washed in the steam washing stage can be determined based on the water level frequency difference; the standard water level can guarantee that the heating pipe can work normally, that is, dry burning is avoided, and that the water amount heated during the steam washing is small; when the steam washing procedure is performed, the water level is maintained at the standard water level through dynamic water addition, which can generate sufficient steam to perform steam washing, maintain a small amount of water, and avoid dry burning of the heating pipe; maintaining a small amount of water can increase the steam generation speed and reduce the heating energy consumption, and can also avoid excessive moisture of the load to be washed to increase the energy consumption of subsequent dehydration, drying and other processes.

[0008] In some embodiments of the present application, the standard water level in the steam washing stage is determined, specifically including: Water absorption washing: after the water addition is completed, the inner drum is controlled to perform the first forward and backward rotation after a first set time; the first water level frequency difference before and after the first forward and backward rotation is obtained; if the first water level frequency difference does not exceed a first set frequency difference, the water level after the first forward and backward rotation is determined as the standard water level; if the first water level frequency difference exceeds the first set frequency difference, water is added for washing; The water replenishing washing is performed according to the second set water amount, and the water level after the water replenishing and water absorbing is determined as the standard water level in the steam washing stage.

[0009] In the embodiment, the standard water level is determined in two stages. In the water absorbing washing stage, a first set frequency difference is set to ensure that the water level is above the heating tube after the water absorbing of the washing load, and the washing load is controlled to absorb water by the forward and reverse rotation. If the water absorbing is more and the water level frequency is high, it indicates that the water absorbing of the washing load is strong, the water level is below the heating tube, and the water absorbing of the washing load is not sufficient. Therefore, the water replenishing washing stage is needed. If the water absorbing is less and the water level frequency is low, it indicates that the water absorbing of the washing load is sufficient, and the water level is above the heating tube. Therefore, the water level after the water absorbing of the washing load is determined as the standard water level in the steam washing stage. In the water replenishing washing stage, a second set frequency difference is set to ensure that the water level is above the heating tube after the further water absorbing of the washing load, and the washing load is controlled to further absorb water by the forward and reverse rotation. If the water absorbing is less and the water level frequency is low, it indicates that the water absorbing of the washing load is sufficient, and the water level is above the heating tube. Therefore, the water level after the water replenishing and water absorbing is determined as the standard water level in the steam washing stage. If the water absorbing is more and the water level frequency is high, the fixed water amount is further replenished, because the water has been replenished for three times, the water absorbing of the washing load is sufficient, and the water level after the fixed water amount is replenished is determined as the standard water level in the steam washing stage. In the steam washing stage, the water level is maintained at the standard water level by the dynamic monitoring and dynamic water replenishing, so that the washing with less water and the dry burning of the heating tube are avoided.

[0010] In some embodiments of the application, the forward and reverse rotation control comprises: performing the forward rotation, the static state, the reverse rotation and the static state according to the set period.

[0011] In the embodiment, the forward rotation, the static state, the reverse rotation and the static state are periodically performed to make the washing load sufficiently and evenly absorb water.

[0012] In some embodiments of the application, the steam washing comprises: Temperature rising: the heating tube is controlled to be turned on for T1 time and turned off for T2 time until the water temperature reaches the set evaporation temperature; Constant temperature: when the water temperature is lower than the lower limit of the constant temperature, the heating tube is controlled to be turned on for T3 time or heated until the water temperature reaches the set evaporation temperature, and then the heating tube is turned off. The above process is repeatedly performed. Evaporation water replenishment: during the temperature rising and constant temperature periods, the inner cylinder rotates according to the set rotation and stop ratio, and water is replenished according to the standard water level.

[0013] In this embodiment, because the step of determining the standard water level in advance maintains the water inflow at a low level, the steam can be generated quickly and efficiently in a fast temperature rising manner. After the temperature rising reaches the set evaporation temperature, the steam washing process is maintained at a stable steam amount in a constant temperature control manner. During this period, the water level is maintained at the standard water level by dynamically monitoring the water level and dynamically replenishing water to the standard water level, so as to avoid dry burning of the heating pipe and maintain a small amount of heating water while not increasing energy consumption too much. Further, a reasonable rotation and stop ratio is adopted to make the steam fully penetrate into the load, so as to achieve energy-saving and efficient washing effect.

[0014] In some embodiments of the present application, the steam washing also includes: Heating protection: when the temperature rising speed of the water exceeds the set rate, the heating pipe is turned off, water is replenished by the third set amount, and then the heating pipe is turned on again after being stationary for the second set time.

[0015] The present application also provides a washing device, which comprises: an outer cylinder, the inner bottom of which is provided with a heater; an inner cylinder, which is installed in the outer cylinder and is used for containing the load to be washed; a water level sensor, which is installed at the inner bottom of the outer cylinder and is used for detecting the washing water level; a water inflow pipeline, which is provided with a water inflow valve and is used for inflowing water to the outer cylinder to implement the washing function; an initial water inflow amount determination module, which is used for obtaining the weight information of the load to be washed after the steam washing program is started, and determining the initial water inflow amount based on the weight information; a standard water level determination module, which is used for inflowing water according to the initial water inflow amount; after the water inflow is completed, the inner cylinder is controlled to rotate forward and backward, the water level frequency difference before and after the forward and backward rotation is obtained, and the standard water level in the steam washing stage is determined based on the water level frequency difference; a steam washing execution module, which is used for starting the heating pipe to make the water rise in temperature and maintain at the set evaporation temperature; during this period, the water level is maintained at the standard water level; a temperature lowering module, which is used for turning off the heating pipe and ending the steam washing when the temperature in the cylinder reaches the end condition.

[0016] Compared with the prior art, the advantages and positive effects of the present application are that: the washing equipment provided by the present application weighs the dry load to be washed before steam washing is performed, and different initial water inflow amounts are determined for different weights of the load to be washed; after water is inflowed at the initial water inflow amount, the inner drum is controlled to be forward and reverse rotated to allow the load to be washed to fully absorb moisture; the water absorption performance of the load of different materials is different, and the water absorption speed and water amount are also different; therefore, after forward and reverse rotation, the water absorption speed and water amount of the load to be washed of the same weight but of different materials are different, and the water level frequency difference before and after forward and reverse rotation is also different; if the water level frequency difference is large, water needs to be supplemented to increase the water level to be above the heating pipe; if the water level frequency difference is small, water does not need to be supplemented; therefore, the water level frequency difference can be used to determine the standard water level of the load to be washed in the steam washing stage; the standard water level can ensure that the heating pipe can work normally, that is, dry burning is avoided, and can also ensure that the water amount heated during steam washing is small; when the steam washing program is performed, the water level is maintained at the standard water level through dynamic water supplementing, so that the steam washing can be performed with sufficient steam amount, the water amount used is small, and dry burning of the heating pipe is avoided; the small amount of water used can improve the steam generation speed and reduce the heating energy consumption, and can also avoid the load to be washed from being too wet to increase the energy consumption of subsequent dehydration, drying and other processes.

[0017] In some embodiments of the present application, the standard water level determination module comprises: a water absorption washing control unit configured to, after water inflow is completed, stand for a first set time, and then control the inner drum to perform first forward and reverse rotation; obtain a first water level frequency difference before and after the first forward and reverse rotation; if the first water level frequency difference does not exceed a first set frequency difference, determine the water level value after the first forward and reverse rotation as the standard water level; if the first water level frequency difference exceeds the first set frequency difference, perform water supplementing washing. a water supplementing washing control unit configured to, according to a first set amount, inflow water; after water inflow is stopped, control the inner drum to perform second forward and reverse rotation, and obtain a second water level frequency difference after the first forward and reverse rotation and the second forward and reverse rotation; if the second water level frequency difference does not exceed a second set frequency difference, determine the water level value after the second forward and reverse rotation as the standard water level; if the second water level frequency difference exceeds the second set frequency difference, according to a second set amount, inflow water, and determine the water level after the water is inflowed according to the second set amount as the standard water level.

[0018] In some embodiments of the present application, the forward and reverse rotation control of the standard water level determination module comprises: performing forward rotation, standing, reverse rotation and standing according to a set period.

[0019] In some embodiments of the present application, the steam washing execution module comprises: a temperature rising control unit configured to control the heating pipe to be turned on for T1 time and turned off for T2 time until the water temperature reaches a set evaporation temperature. The constant temperature control unit is used to control the opening of the heating pipe for T3 time or heating to the water temperature reaching the set evaporation temperature when the water temperature is lower than the constant temperature lower limit value, and then closing the heating pipe; and repeatedly executing the above steps. The evaporation water replenishment control unit is used to control the rotation of the inner cylinder according to the set rotation and stop ratio and replenishing water according to the standard water level during the temperature rising and constant temperature.

[0020] In some embodiments of the present application, the steam washing execution module further comprises: The heating protection unit is used to close the heating pipe when the temperature rising speed of the water temperature exceeds the set speed, and then opening the heating pipe after the water is added by the third set amount and standing for the second set time.

[0021] Other features and advantages of the present application will become more apparent after reading the detailed description of the embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 The execution steps of the steam washing control method for the washing equipment proposed by the present application; Figure 2 The execution steps of the steam washing control method given in the embodiments of the present application; Figure 3 The control flow of the water adding washing in the method of the present application; Figure 4 The control flow of the water replenishment washing in the method of the present application; Figure 5 The functional structure diagram of the washing equipment proposed by the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] In the description of the present application, it is to be understood by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0026] In the description of the present application, it is to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0027] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0028] The steam washing control method given in the embodiment is applied to a washing device provided with a heating pipe, which includes an outer cylinder, a heater placed at the bottom of the outer cylinder, an inner cylinder installed in the outer cylinder for containing a load to be washed, a water level sensor installed at the bottom of the outer cylinder for detecting the water level, and a water inlet pipeline provided with a water inlet valve for water inlet to the outer cylinder to implement the washing function. In the embodiment of the present application, the heating pipe is the existing device for the washing device to perform heating washing. The washing device of the present embodiment is provided with a steam washing program, and the existing device is applied to implement the steam washing function, as shown in the figure, including the following steps: Figure 1 S1: Weighing and determining the initial water inlet amount.

[0029] Taking a washing machine as an example, after the user starts the steam washing function, the washing machine detects the weight of the dry load to be washed, and determines the initial water inlet amount according to the weight.

[0030] The way to obtain the weight of the load to be washed is, for example, obtained by a pressure sensor placed at the bottom of the inner cylinder, for example, by rotating the inner cylinder to obtain the motor current, by analyzing the motor current to calculate, etc. The present embodiment is not limited specifically.

[0031] ​The initial water inflow is different according to the weight of the load to be washed, the heavier the load, the more the initial water inflow, and the lighter the load, the less the initial water inflow, which can be determined according to statistical experience values.

[0032] S2: Determine the standard water level.

[0033] Turn on the electromagnetic valve on the water inflow pipeline to inflow water into the drum at the initial water inflow, and after the water inflow is completed, control the forward and reverse rotation of the inner drum to allow the load to be washed to fully absorb water.

[0034] Obtain the water level frequency values before and after the forward and reverse rotation, calculate the water level frequency difference, and set a water level frequency difference limit value according to the height of the heating pipe. If the water absorption of the load to be washed is high, the water absorption speed is fast, and the water absorption amount is also high, then the water level frequency difference before and after water absorption is large, which causes the water level after water absorption to be lower than the heating pipe, and then the water level needs to be above the heating pipe through water replenishment. If the water absorption of the load to be washed is weak, the water absorption amount is small, and the water level frequency difference before and after water absorption is small, then the water level after water absorption can be kept above the heating pipe.

[0035] The embodiment sets a water level frequency difference before and after water absorption of the load to be washed. Below the water level frequency difference, the water level drops from the water level corresponding to the initial water inflow to the standard water level, which is above the heating pipe and has a height less than the set value. The set value is a tolerance value, which is used to limit the standard water level to be above the heating pipe and have a small amount of water, so as to limit the amount of water heated during steam washing as small as possible and avoid dry burning of the heating pipe.

[0036] S3: Perform steam washing.

[0037] After the standard water level is determined, the steam washing function is started: the heating pipe is started to heat the water to a set evaporation temperature and maintain the set evaporation temperature. During the execution, the water level is detected in real time by the water level sensor. When the water level is lower than the standard water level, the electromagnetic valve of the water inflow pipeline is opened to inflow water to the standard water level, and the washing water level is dynamically maintained at the standard water level.

[0038] Since the standard water level is the lowest water level that just covers the heating pipe, the steam washing program of the present application can heat as little water as possible during execution to improve the heating speed and evaporation effect, thereby improving the steam washing effect, and the maintenance of low water amount can avoid the load to be washed from being too wet.

[0039] S4: Cooling: turn off the heating pipe, and end the steam washing when the temperature in the drum reaches the end condition.

[0040] The heating pipe is turned off during the cooling stage, and the temperature in the drum is obtained. When the temperature in the drum reaches the end condition (the temperature is lower than the set temperature), the steam washing is ended.

[0041] After the cooling is ended, the existing washing functions can be executed to perform the processes of draining and dehydrating until the entire washing program is ended.

[0042] The steam washing control method of the present application is described in detail below with specific embodiments.

[0043] As shown in the embodiment, the method comprises the following steps: Figure 2 S21: After starting the steam washing function, the weight of the dry load to be washed is acquired, and the initial water inflow is determined based on the weight. S22: Suction washing to determine the standard water level.

[0044] As shown in the embodiment, after the water inflow is completed, a period of time (e.g., 10S) is allowed for standing, the water level is continuously detected during the standing period, the water level frequency WLA is calculated, and then the inner drum is controlled to rotate forward (clockwise) at a speed of 40 rpm for 10S, stand for 10S, rotate reverse (counterclockwise) for 10S, stand for 10S, run for three cycles, the combination of forward and reverse rotation and standing allows the load to be washed to fully absorb water, and then stand for 10S, during which the water level frequency WLB is detected and calculated, and the water level frequency difference a = WLA-WLB is calculated.

[0045] Figure 3 A first set frequency difference is set, for example, 0.03khz, when a≤0.03khz, it indicates that the load to be washed has a fast water absorption speed and a large water absorption amount, resulting in the water level falling below the heating pipe, and S23 needs to be further executed, when a>0.03khz, it indicates that the load to be washed has a slow water absorption speed and a small water absorption amount, and the water level after the forward and reverse rotation and standing is taken as the standard water level, and step S24 is executed.

[0046] S23: Suction washing to determine the standard water level.

[0047] As shown in the embodiment, when the water level frequency difference a calculated in the suction washing stage is ≤0.03khz, water is continuously inflowed according to the first set amount (or inflowed for a set time period, e.g., 2S), so that the water level is above the heating pipe, and a second forward and reverse rotation is executed: the inner drum is controlled to rotate forward (clockwise) at a speed of 40 rpm for 10S, stand for 10S, rotate reverse (counterclockwise) for 10S, stand for 10S, run for three cycles; during which the water level is detected and the water level frequency WLC is calculated.

[0048] A second set frequency difference is set, and in this embodiment, 0.03khz is still taken as an example, the water level frequency difference b = WLB-WLC is calculated, when b≤0.03khz, water is again inflowed (by a second set amount, e.g., for 1S), and the water level after the water inflow is taken as the standard water level, when b>0.03khz, the water level after the second forward and reverse rotation is taken as the standard water level. Figure 4

[0049]

[0050] ​​​S24: Temperature rising control: control the heating tube to be turned on for T1 time and turned off for T2 time until the water temperature reaches the set evaporation temperature, during which the inner cylinder is controlled to rotate at a set rotation-stop ratio and the water level is detected, and when the water level is lower than the standard water level, water supplement is implemented.

[0051] Since the water level is dynamically maintained at the standard water level, the amount of water heated by the heating tube is small, and the water level can be quickly heated to the set evaporation temperature. In the embodiment, the set evaporation temperature is 63℃.

[0052] The inner cylinder rotates at a set rotation-stop ratio, so that the to-be-washed load is fully and evenly contacted with water vapor.

[0053] S25: Constant temperature control: when the water temperature is lower than the lower limit of the constant temperature, control the heating tube to be turned on for T3 time or heated to the set evaporation temperature, and then turned off; repeat the execution; during which the inner cylinder is controlled to rotate at a set rotation-stop ratio and the water level is detected, and when the water level is lower than the standard water level, water supplement is implemented.

[0054] The lower limit of the constant temperature is, for example, 59℃. When the water temperature is lower than 59℃, the heating tube is controlled to be turned on for 70S or heated to 63℃ and then turned off. The step is repeatedly executed to realize constant temperature control, so as to realize continuous and stable steam generation and reduce energy consumption as much as possible.

[0055] S26: Heating protection: when the water temperature rising speed exceeds the set speed, the heating tube is turned off, and then water is added by a third set amount, and the heating tube is turned on again after being kept still for a second set time.

[0056] When the water temperature rising speed exceeds 15℃ per minute in the temperature rising and constant temperature control stages, the heating tube is turned off, water is added for 2S, and then the heating tube is turned on again after being kept still for 5S.

[0057] S27: Temperature falling: the heating tube is turned off, and the inner cylinder continues to rotate until the temperature in the cylinder is lower than the end temperature.

[0058] S28: execute the drainage and dehydration process until the washing program ends.

[0059] After the temperature falling, the normal washing program is continued to execute the drainage and dehydration process.

[0060] The application also provides a washing device, as shown in the drawings, comprising: Figure 5 An outer cylinder, the inner bottom of which is provided with a heater; An inner cylinder, which is installed in the outer cylinder and is used for containing the to-be-washed load; A water level sensor, which is installed at the inner bottom of the outer cylinder and is used for detecting the washing water level; A water inlet pipeline, which is provided with a water inlet valve and is used for adding water to the outer cylinder to implement the washing function; ​An initial water inflow determining module is configured to acquire weight information of the load to be washed after the steam washing program is started, and determine an initial water inflow based on the weight information; A standard water level determining module is configured to control the inner drum to rotate forward and reverse, acquire a water level frequency difference before and after the rotation, and determine a standard water level of the steam washing stage based on the water level frequency difference after the water inflow is completed; A steam washing executing module is configured to start the heating pipe to heat the water and maintain the water at a set evaporation temperature, and maintain the water level at the standard water level during the heating. A cooling module is configured to stop the heating pipe, and end the steam washing when the temperature in the drum reaches an end condition.

[0061] In some embodiments of the present application, the standard water level determining module comprises: A water absorption washing control unit is configured to control the inner drum to rotate forward and reverse for a first time after the water inflow is completed, acquire a first water level frequency difference before and after the first rotation, and determine a water level value after the first rotation as the standard water level if the first water level frequency difference does not exceed a first set frequency difference, or perform water supplement washing if the first water level frequency difference exceeds the first set frequency difference. A water supplement washing control unit is configured to control the inner drum to rotate forward and reverse for a second time after the water inflow is stopped, acquire a second water level frequency difference after the first rotation and the second rotation, and determine a water level value after the second rotation as the standard water level if the second water level frequency difference does not exceed a second set frequency difference, or perform water inflow according to a second set amount and determine a water level after the water inflow according to the second set amount as the standard water level if the second water level frequency difference exceeds the second set frequency difference.

[0062] In some embodiments of the present application, the forward and reverse rotation control of the standard water level determining module comprises: performing forward rotation, standing, reverse rotation, and standing according to a set period.

[0063] In some embodiments of the present application, the steam washing executing module comprises: A temperature rising control unit is configured to control the heating pipe to be turned on for a T1 time and turned off for a T2 time until the water temperature reaches the set evaporation temperature. A constant temperature control unit is configured to control the heating pipe to be turned on for a T3 time or heat the water until the water temperature reaches the set evaporation temperature, and turn off the heating pipe when the water temperature is lower than a lower limit value of the constant temperature, and repeatedly perform the control. An evaporation water supplement control unit is configured to control the inner drum to rotate according to a set rotation and stop ratio, and supplement water according to the standard water level during the temperature rising and the constant temperature.

[0064] In some embodiments of the present application, the steam washing executing module further comprises: The heating protection unit is used to close the heating pipe when the temperature rising speed of the water exceeds a set rate, and to open the heating pipe after the water is added by a third set amount and is left for a second set time.

[0065] It should be noted that in the specific implementation process, the control part described above can be realized by a processor in the form of hardware executing computer execution instructions in the form of software stored in the memory, which is not described here, and the programs corresponding to the actions performed by the control circuit can be stored in the computer readable storage medium of the system in the form of software, so that the processor calls and executes the operations corresponding to each module.

[0066] The computer readable storage medium mentioned above can include a volatile memory such as a random access memory, and can also include a non-volatile memory such as a read-only memory, a flash memory, a hard disk or a solid state disk, and can also include a combination of the above kinds of memories.

[0067] The processor mentioned above can also be a general term for a plurality of processing elements. For example, the processor can be a central processing unit, and can also be other general-purpose processors, digital signal processors, application-specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc., and can also be a special-purpose processor.

[0068] It should be noted that the above description is not a limitation of the present application, and the present application is also not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present application should also be within the scope of the present application.

Claims

1. A steam washing control method for a washing apparatus, applied in a washing apparatus, the washing apparatus comprising: an outer tub, an inner bottom of which is provided with a heater; an inner tub, installed in the outer tub, for containing a load to be washed; a water level sensor, installed on the inner bottom of the outer tub, for detecting a washing water level; a water inlet pipeline, provided with a water inlet valve, for supplying water to the outer tub to implement a washing function; characterized in that the control method comprises: weighing and determining an initial water inlet amount: obtaining weight information of the load to be washed after a steam washing program is started, and determining the initial water inlet amount based on the weight information; determining a standard water level: supplying water in the initial water inlet amount; after the water supply is completed, controlling the inner tub to perform forward and reverse rotation; obtaining a water level frequency difference before and after the forward and reverse rotation, and determining the standard water level of the steam washing stage based on the water level frequency difference; the standard water level exceeds the heating pipe and exceeds a height less than a set value; performing steam washing: starting the heating pipe to heat the water and maintain it at a set evaporation temperature; during this period, the water level is maintained at the standard water level; cooling down: closing the heating pipe, and ending the steam washing when the temperature in the tub reaches an end condition.

2. The steam wash control method for a washing apparatus according to claim 1 or 2, characterized in that, determining the standard water level of the steam washing stage specifically comprises: water absorption washing: after the water supply is completed, standing for a first set time, and then controlling the inner tub to perform a first forward and reverse rotation; obtaining a first water level frequency difference before and after the first forward and reverse rotation, and if the first water level frequency difference does not exceed a first set frequency difference, determining the water level value after the first forward and reverse rotation as the standard water level; if the first water level frequency difference exceeds the first set frequency difference, performing water replenishment washing; water replenishment washing: supplying water in a first set amount; after stopping the water supply, controlling the inner tub to perform a second forward and reverse rotation, and obtaining a second water level frequency difference after the first forward and reverse rotation and the second forward and reverse rotation; if the second water level frequency difference does not exceed a second set frequency difference, determining the water level value after the second forward and reverse rotation as the standard water level; if the second water level frequency difference exceeds the second set frequency difference, supplying water in a second set amount, and determining the water level after the water supply in the second set amount as the standard water level.

3. The steam wash control method for a washing apparatus according to claim 1 or 2, characterized in that, forward and reverse rotation control comprises: performing forward rotation, standing, reverse rotation, and standing according to a set period.

4. The steam washing control method for a washing apparatus according to claim 1, characterized by, performing steam washing comprises: warming up: controlling the heating pipe to be on for T1 time and off for T2 time until the water temperature reaches the set evaporation temperature; constant temperature: when the water temperature is lower than a lower limit value of the constant temperature, controlling the heating pipe to be on for T3 time or heating until the water temperature reaches the set evaporation temperature, and closing the heating pipe; repeatedly performing; evaporation water replenishment: during the warming up and the constant temperature, controlling the inner tub to rotate according to a set rotation and stop ratio, and replenishing water according to the standard water level.

5. The steam wash control method for a washing apparatus according to claim 4, characterized by, performing steam washing further comprises: heating protection: when the warming up speed of the water temperature exceeds a set rate, closing the heating pipe, supplying water in a third set amount, standing for a second set time, and then opening the heating pipe. 6.A washing apparatus, comprising: an outer tub, an inner bottom of which is provided with a heater; an inner tub, installed in the outer tub, for containing a load to be washed; a water level sensor, installed on the inner bottom of the outer tub, for detecting a washing water level; a water inlet pipeline, provided with a water inlet valve, for supplying water to the outer tub to implement a washing function; characterized in that it further comprises: The initial water intake determining module is configured to acquire weight information of the load to be washed after the steam washing program is started, and determine the initial water intake based on the weight information. The standard water level determining module is configured to fill water in the initial water intake, and control the inner drum to rotate forward and backward after the water filling is completed, acquire a water level frequency difference before and after the forward and backward rotation, and determine a standard water level of the steam washing stage based on the water level frequency difference. The steam washing executing module is configured to start the heating pipe to heat and maintain the water at a set evaporation temperature, and maintain the water level at the standard water level during the heating. The cooling module is configured to stop the heating pipe, and end the steam washing when the temperature in the drum reaches an end condition.

7. The washing apparatus according to claim 6, characterized by The standard water level determining module includes: The water absorption washing control unit is configured to control the inner drum to rotate forward and backward for a first time after the water filling is completed, acquire a first water level difference before and after the first forward and backward rotation, and determine the water level after the first forward and backward rotation as the standard water level if the first water level difference does not exceed a first set difference, or perform water supplement washing if the first water level difference exceeds the first set difference. The water supplement washing control unit is configured to fill water in a first set amount, control the inner drum to rotate forward and backward for a second time after the water filling is stopped, acquire a second water level difference after the first forward and backward rotation and the second forward and backward rotation, and determine the water level after the second forward and backward rotation as the standard water level if the second water level difference does not exceed a second set difference, or fill water in a second set amount and determine the water level after the water filling in the second set amount as the standard water level if the second water level difference exceeds the second set difference.

8. The washing apparatus according to claim 6 or 7, characterized by, The forward and backward rotation control of the standard water level determining module includes: performing forward rotation, standing, backward rotation, and standing in a set period.

9. The washing apparatus according to claim 6, wherein The steam washing executing module includes: The temperature rising control unit is configured to control the heating pipe to be turned on for a T1 time and turned off for a T2 time until the water temperature reaches the set evaporation temperature. The constant temperature control unit is configured to control the heating pipe to be turned on for a T3 time or heated until the water temperature reaches the set evaporation temperature, and turned off when the water temperature is lower than a lower limit value of the constant temperature, and repeatedly perform the control. The evaporation water supplement control unit is configured to control the inner drum to rotate according to a set rotation and stop ratio during the temperature rising and the constant temperature, and supplement water according to the standard water level.

10. The washing apparatus according to claim 9, wherein The steam washing executing module further includes: The heating protection unit is configured to turn off the heating pipe when the temperature rising speed of the water exceeds a set speed, fill water in a third set amount, stand for a second set time, and then turn on the heating pipe.

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