CN111364205B - Control method of washing machine and washing machine - Google Patents

Abstract

The invention discloses a washing machine control method and the washing machine. The washing machine is provided with a steam generating device, including a steam washing program. The control method includes: when the washing machine executes the steam washing program, the washing machine starts to perform centrifugal washing after passing steam into the inner tub for a certain period of time. During the centrifugal washing process, the washing machine controls the rotation of the inner tub to change the contact area between the clothes and the steam. After the centrifugal washing process is completed or at the same time, the shaking process is performed. During the shaking process, the washing machine controls the pulsator to rotate to shake the clothes. The control method of the washing machine of the present invention can not only achieve excellent sterilization and mite removal effects, save electric energy and water resources, but also has the characteristics of short time and high efficiency, does not require users to wait for a long time, is convenient for users to use, and greatly improves user experience.

Description

A washing machine control method and washing machine

technical field

The invention belongs to the field of washing machines, and in particular relates to a control method of a washing machine and the washing machine, in particular to a control method of a washing machine with steam washing and the washing machine.

Background technique

With the development of the washing machine industry, consumers have higher and higher requirements for laundry health. Washing bed sheets, pillowcases, blankets, mattress covers, etc. that consumers use daily with hot water at 55°C or above once a week can kill mites and remove most allergens of mites; washing with warm or cold water can remove most allergies Ordinary washing powder can remove most allergens of mites at 25°C for at least 5 minutes; if the temperature is higher than 55°C for 40 minutes, it can kill all mites.

In the related technologies of sterilizing washing machines, ozone, high temperature or silver ions are usually used to sterilize the clothes in the washing machine, but the cost of the high-pressure device used for ozone sterilization is relatively high, and the generated ozone has certain damage to the clothes; High-temperature sterilization needs to heat the water in the washing machine to at least 55°C, which not only requires a lot of heat energy, but also wastes a lot of time for the user during the heating stage; silver ion sterilization also has the problem of high cost.

The Chinese patent with the application number 201621101272.1 discloses a pulsator washing machine, including: a washing tub, a pulsator, a power generation module and an ultraviolet generating module. A washing chamber and a circulating water channel are defined in the washing tub. The water inlet and circulating water outlet, the upper end and the lower end of the circulating water channel are respectively connected with the circulating water inlet and the circulating water outlet; The circulating water outlet flows into the circulating water channel and flows into the washing chamber from the circulating water inlet; the power generation module uses the water flow to generate electric energy; the ultraviolet generating module is connected with the circulating water channel and the power generating module respectively, and the ultraviolet generating module uses electric energy to generate ultraviolet rays to treat the water in the circulating water pipe Sterilization by ultraviolet radiation. The ultraviolet generation module of the above-mentioned patent is installed in the circulating water channel. When the washing machine performs cycle sterilization when there is a lot of water, it takes a long time and the sterilization rate is low.

Therefore, there is a need for a sterilization method and a washing machine with high efficiency, good sterilization effect, and energy and water saving.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a washing machine control method and the washing machine. The washing machine control method of the present invention can not only achieve excellent sterilization and mite removal effects, save electric energy and water resources, but also has The characteristics of short time and high efficiency do not require users to wait for a long time, which is convenient for users to use and greatly improves user experience.

In order to solve the problems of the technologies described above, the present invention adopts the basic idea of technical solution to be:

The first object of the present invention is to provide a control method for a washing machine. The washing machine is provided with a steam generating device, including a steam washing program. The control method includes:

When the washing machine executes the steam washing process, steam is introduced into the inner tub for a certain period of time and then the centrifugal washing process is started. During the centrifugal washing process, the washing machine controls the rotation of the inner tub to change the contact area between the clothes and the steam.

In a further solution, when the washing machine executes the steam washing program, it performs a shaking process after the centrifugal washing process, and during the shaking process, the washing machine controls the pulsator to rotate to shake the clothes; or, the shaking process is performed simultaneously during the centrifugal washing process, The washing machine simultaneously controls the rotation of the pulsator and the inner tub;

Preferably, when the shake-off process is performed simultaneously during the centrifugal washing process, the rotation directions of the inner tub and the pulsator are opposite.

In a further solution, when the washing machine executes the steam washing program, after passing steam into the inner tub for a certain period of time T, it is detected whether the temperature in the inner tub reaches the preset value N, and if it reaches the preset value, the centrifugal washing process is started; Preset value N, then continue to feed steam, and monitor the temperature in the inner barrel in real time;

Preferably, the temperature range of the preset value N is 55°C-90°C;

Preferably, the preset value N is 70°C.

In a further solution, after passing steam into the inner tub for a certain time T, the washing machine controls and adjusts the temperature of the steam generated by the steam generating device according to whether the temperature of the inner tub reaches the preset value N;

Preferably, if the preset value N is not reached after the steam is injected into the inner tub for a certain period of time T, the washing machine controls the temperature of the steam generated by the steam generating device to increase from a to b, where b is greater than a;

Preferably, after the washing machine controls the temperature of the steam generated by the steam generating device to increase from a to b, the temperature in the inner tub is monitored in real time, and when the temperature reaches the preset value N, the centrifugal washing process is started.

In a further solution, in the steam washing procedure, the centrifugal washing process and the pulsator shaking process are repeatedly performed;

Preferably, in the steam washing procedure, multiple rounds of the centrifugal washing process and the pulsator shaking process are repeatedly performed, and the centrifugal washing process is first performed in each round, and then the pulsator shaking process is performed;

More preferably, there is a certain time interval between the previous round of pulsator shaking process and the subsequent round of centrifugal washing process, or there is no time interval.

In a further scheme, the time of the centrifugal washing process is 1-10 times of the shaking process time;

Preferably, the time of the centrifugal washing process is 2-8 times, preferably 5 times, the time of the shaking process;

Preferably, the total time of the multiple rounds of centrifugal washing process and wave wheel shaking process is not less than 10 minutes.

In a further solution, when performing the centrifugal washing process and the shaking process, the washing machine controls the steam generating device to continuously inject steam into the inner tub;

Preferably, during the centrifugal washing process and the shake-off process, the washing machine monitors the temperature in the inner tub in real time, and when the temperature in the inner tub is lower than or higher than a predetermined value N, adjust the flow rate of the steam generating device into the inner tub. The amount of steam and/or the temperature of the steam.

In a further solution, the washing machine executes the steam washing procedure before the washing procedure, and/or, the washing machine executes the steam washing procedure after completing the washing procedure.

In a further solution, the washing machine is turned on, and after the user puts clothes into the inner tub and selects a steam washing program, the washing machine controls the introduction of steam into the inner tub, and controls the rotation of the inner tub after a certain period of time T, and stops the rotation of the inner tub after T1 time; then controls the wave The wheel stops after turning for T2 time; then controls the rotation of the inner tub and the pulsator in turn, and repeats the aforementioned process for several rounds to complete the steam washing procedure; the washing machine stops or starts to perform the normal washing process.

A second object of the present invention is to provide a washing machine having a steam washing program with a control method as described above.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

1. The washing machine of the present invention has a steam washing program. After the washing machine is turned on, the user only needs to select the steam washing program to sterilize and remove mites on the clothes put in. There is no need to add or replace bactericidal substances, so it is easy to use.

2. The steam washing program of the control method of the present invention can control the temperature in the inner tub by controlling the temperature, amount and time of the steam, and use the centrifugal washing process and the shaking process to increase the contact area between the clothes and the steam, The clothes can be in contact with the steam as completely as possible, so as to achieve a very good effect of sterilization and mite removal, and the sterilization rate can reach more than 99.99%.

3. The user of the present invention can choose the steam washing program to sterilize and remove mites before washing, or after the washing is completed, or even perform a sterilization once before and after washing, which requires short time and high efficiency, and does not require the user to spend a long time Waiting is convenient for users and greatly improves user experience.

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute improper limitations to the present invention. Apparently, the drawings in the following description are only some embodiments, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts. In the attached picture:

FIG. 1 is a schematic flow chart of a control method in Embodiment 2 of the present invention;

FIG. 2 is a schematic flowchart of another control method according to Embodiment 2 of the present invention;

Fig. 3 is a schematic flowchart of a control method according to Embodiment 3 of the present invention.

It should be noted that these drawings and text descriptions are not intended to limit the concept scope of the present invention in any way, but illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Embodiment one

This embodiment provides a control method for a washing machine. The washing machine is provided with a steam generating device, including a steam washing program. The control method includes:

When the washing machine executes the steam washing process, steam is introduced into the inner tub for a certain period of time and then the centrifugal washing process is started. During the centrifugal washing process, the washing machine controls the rotation of the inner tub to change the contact area between the clothes and the steam.

The silver ion sterilizers used in the market now need to be replaced or added with silver ion sterilizers after a period of use. In this solution, a steam washing program is set on the washing machine. When the user needs to sterilize the clothes, the user turns on the washing machine and selects the steam washing program to steam sterilize the clothes. No other operations are required, so it is convenient and simple to use.

In this solution, the washing machine may be a drum washing machine, a wave-wheel washing machine, a double-tub washing machine, or the like. The steam generating device includes a heating device, water is fed into the heating device, and water vapor is generated after the heating device starts to work. The setting method and installation method of the steam generating device can adopt the scheme in the prior art, and can also be an improved scheme, which can realize steam generation and input into the inner barrel, and the steam can pass between the inner barrel and the outer barrel. It can be directly passed into the inner barrel.

In this program, after the user selects the steam washing program, the washing machine first passes steam into the inner tub for a certain period of time. purpose of bacteria. In this solution, the temperature, flow and time of steam can be preset, and the washing machine controls the steam generating device to generate steam at a certain temperature according to the preset value, and controls the flow and time of steam entering the inner tub, so that the inner tub can be used in a short time. reach the desired temperature. For example, the temperature of the water vapor can be set in the range of 50-100°C.

In this solution, steam is introduced into the inner tub for a certain period of time to start the centrifugal washing process. The centrifugal washing process is that the washing machine controls the inner tub to rotate at a certain speed. During the centrifugal washing process, the clothes in the inner tub will be distributed on the inner wall of the inner tub under the action of centrifugal force, stick to the inner wall or climb up along the inner wall. Compared with the situation where the clothes are piled up at the bottom of the inner tub, during the centrifugal washing process, when the clothes are distributed along the inner wall of the inner tub, the contact area with the steam will be greatly increased, so that all clothes and all parts of each clothes can be sterilized and removed The effect of improving the sterilization rate.

In a further solution, when performing the centrifugal washing process, the washing machine controls the inner tub to rotate forward and/or reverse at a certain speed, so as to change the contact area between the clothes and the steam.

In the centrifugal washing process of this solution, the inner tub can only be rotated forward, reversed only, or rotated forward and reversed alternately, so that the clothes can be turned over better, so that all parts of the clothes are fully in contact with the steam, and the sterilization is improved. Effect. When forward rotation and reverse rotation are performed alternately, the rotational speeds of forward rotation and reverse rotation may be the same or different.

Further, when performing the centrifugal washing process, the washing machine controls the inner tub to rotate for a certain period of time, then pauses for a certain period of time, and then rotates again at such intervals. When the inner tub stops rotating, the clothing will change its position under the action of inertia and gravity, thereby changing the contact area with the steam, which is beneficial to improve the sterilization rate.

If the inner barrel only performs forward rotation or only reverse rotation, it will pause for a certain period of time after forward rotation/reverse rotation for a certain period of time, and then perform forward rotation/reverse rotation at such intervals. If the inner barrel performs forward rotation and reverse rotation, then the forward rotation and reverse rotation are performed at intervals of a certain period of time.

In a further solution, the washing machine executes the steam washing procedure before the washing procedure, and/or, the washing machine executes the steam washing procedure after completing the washing procedure.

Users can choose the steam washing program to sterilize and remove mites before washing according to their needs, and can also perform sterilization and mite removal after washing. Users can even choose to perform sterilization and mite removal twice before washing and after washing to achieve more thorough cleaning Bactericidal and mite-removing effect.

Embodiment two

As shown in Figure 1 and Figure 2, this embodiment is a further limitation of Embodiment 1. In this embodiment, when the washing machine executes the steam washing program, the centrifugal washing process is started after passing steam into the inner tub for a certain period of time. During the centrifugal washing process, the washing machine controls the rotation of the inner tub to change the contact area between the clothes and the steam. After the centrifugal washing process, the shaking process is performed. During the shaking process, the washing machine controls the pulsator to rotate to shake the clothes.

In this embodiment, the washing machine is a washing machine with a pulsator, for example, may be a pulsator washing machine. After the centrifugal washing process is over, the clothes will fall from the wall of the bucket under the action of gravity. At this time, the wave wheel is controlled to rotate and stir to shake the clothes, change the position of the clothes, change the contact area between the clothes and the steam, or affect the re-centrifugation The distribution during washing and the contact area with steam can improve the sterilization rate.

In a further solution, when performing the shaking process of the pulsator, the washing machine controls the pulsator to rotate forward and/or reverse at a certain speed, so as to change the position of the clothes and the contact area with the steam.

In the shaking process of the pulsator in this scheme, the pulsator can only perform forward rotation, or only reverse rotation, or forward rotation and reverse rotation alternately, so that the clothes can be turned over and shaken better, the position of the clothes can be changed, and each part of the clothes Some of them are in full contact with steam to improve the sterilization effect. When forward rotation and reverse rotation are performed alternately, the rotational speeds of forward rotation and reverse rotation may be the same or different.

Preferably, the rotation speed of the pulsator is low to prevent damage to the clothes.

Further, when performing the shaking process of the pulsator, the washing machine controls the pulsator to rotate for a certain period of time, pause for a certain period of time, and then rotate again, at such intervals. When the pulsator stops rotating, the clothes will change their position under the action of inertia, thereby changing the contact area with the steam, or it can affect the distribution and the contact area with the steam during centrifugal washing, which is conducive to improving the sterilization rate. It is good for protecting clothes and preventing them from being overwound.

If the pulsator only performs forward rotation or only reverse rotation, it will pause for a certain period of time after forward rotation/reverse rotation for a certain period of time, and then perform forward rotation/reverse rotation at such intervals. If the pulsator performs both forward rotation and reverse rotation, the interval between forward rotation and reverse rotation is executed at a certain time.

In a further solution, when the washing machine executes the steam washing program, after passing steam into the inner tub for a certain period of time T, it is detected whether the temperature in the inner tub reaches the preset value N, and if it reaches the preset value, the centrifugal washing process is started; Preset value N, then continue to feed steam, and monitor the temperature in the inner barrel in real time.

In this solution, the washing machine performs a centrifugal washing process when the temperature in the inner tub reaches the preset value N, which can ensure that most of the mites and bacteria can be killed when the temperature is maintained for a certain period of time, thereby ensuring the sterilization effect. After the steam is supplied for a certain period of time T, if the detected temperature in the inner bucket does not reach the preset value N, it is necessary to continue to supply steam and continue to increase the temperature of the inner bucket. After the temperature in the inner bucket reaches the preset value N, perform centrifugation Washing process, so as to ensure the sterilization effect.

In a preferred solution, the temperature range of the preset value N is 55°C-90°C;

Preferably, the preset value N is 70°C.

In a further solution, in the steam washing procedure, the centrifugal washing process and the pulsator shaking process are repeatedly performed; thereby changing the area and position of the clothes in contact with the steam for many times to ensure that all parts of the clothes are sterilized and de-mite, Guaranteed to kill more than 99.99% of bacteria.

Preferably, in the steam washing procedure, multiple rounds of the centrifugal washing process and the pulsator shaking process are repeatedly performed, and the centrifugal washing process is first performed in each round, and then the pulsator shaking process is performed;

More preferably, there is a certain time interval between the previous round of pulsator shaking process and the subsequent round of centrifugal washing process, or there is no time interval.

In a further scheme, the time of the centrifugal washing process is 1-10 times of the shaking process time;

Preferably, the time of the centrifugal washing process is 2-8 times, preferably 5 times, the time of the shaking process. This scheme allocates the time reasonably, which is conducive to improving the sterilization rate and achieving the purpose of saving time.

Preferably, the total time of the multiple rounds of centrifugal washing process and wave wheel shaking process is not less than 10 minutes, so that the sterilization rate can be guaranteed.

In a further solution, when performing the centrifugal washing process and the shaking process, the washing machine controls the steam generating device to continuously inject steam into the inner tub;

Preferably, during the centrifugal washing process and the shake-off process, the washing machine monitors the temperature in the inner tub in real time, and when the temperature in the inner tub is lower than or higher than a predetermined value N, adjust the flow rate of the steam generating device into the inner tub. The amount of steam and/or the temperature of the steam.

In this solution, during the centrifugal washing process and the shaking process, the temperature in the inner tub can always be maintained at about the preset value N, so as to ensure that the best sterilization and mite removal effect can be achieved.

Further, as a specific control method implementation, it is as follows:

When the washing machine is turned on, after the user puts clothes into the inner tub and selects the steam washing program, the washing machine controls the introduction of steam into the inner tub, and controls the rotation of the inner tub after a certain period of time T, and stops after the inner tub rotates for T1 time; then controls the pulsator to rotate for T2 time Then stop; then control the rotation of the inner tub and the pulsator in turn, and repeat the aforementioned process for several rounds to complete the steam washing process; the washing machine stops or starts to perform the normal washing process.

More specifically, the process of the steam washing program includes:

After the user puts clothes into the empty inner tub of the washing machine, select the steam washing program and start it. The washing machine controls the steam generating device to start running to generate steam. After running for 180s, when the temperature in the inner tub is detected to reach 70°C, centrifugal washing starts for 50s. , to change the contact surface between the clothes and the steam. During the centrifugal washing process, the clothes will stick to the barrel wall. After the end, they will fall from the barrel wall to the pulsator under the action of gravity. Fully sterilize in a high-temperature environment, and cycle through this program 10 times for a total of 10 minutes, and the sterilizing rate can reach more than 99.99%. The specific timing is shown in Table 1.

Table 1 Sequence table of washing process of washing machine

Embodiment Three

As shown in Figure 3, this embodiment is a further limitation of Embodiment 1. In this embodiment, when the washing machine executes the steam washing procedure, steam is passed into the inner tub for a certain period of time T, and then the centrifugal washing process and shaking off are started at the same time. During the process, the washing machine controls the rotation of the pulsator and the inner tub at the same time to change the contact area between the clothes and the steam, which is beneficial to improve the sterilization rate.

After the user selects the steam washing program, the washing machine controls the steam generating device to start, and starts to spray water vapor at about 100°C. The inner tub rotates at a lower speed, and the agitation of the pulsator makes the clothes fully soaked in the water vapor. The temperature in the tub can reach When the temperature reaches above 70°C, keep the temperature running for 10 minutes, then the program will stop, and the effect of sterilization and mite removal will be completed, and the sterilization rate can reach more than 99.9%.

In the preferred solution, when the shake-off process is performed simultaneously during the centrifugal washing process, the rotation direction of the inner tub and the pulsator is opposite, which not only can change the contact area between the clothes and the steam, but also helps to improve the sterilization rate, and can also prevent the clothes from being entangled and protect them. The role of clothing.

Embodiment Four

This embodiment is a further limitation of embodiment two, and the difference between this embodiment and embodiment one is:

After passing steam into the inner tub for a certain time T, the washing machine controls and adjusts the temperature of the steam generated by the steam generating device according to whether the temperature of the inner tub reaches the preset value N.

Further, if the preset value N is not reached after the steam is injected into the inner tub for a certain period of time T, the washing machine controls the temperature of the steam generated by the steam generating device to increase from a to b, where b is greater than a.

In this solution, within the time T, the steam introduced does not make the temperature of the inner barrel reach the preset value N, indicating that the sterilization efficiency of steam at this temperature is low due to factors such as low ambient temperature. The control device of the washing machine controls the steam generating device to increase the temperature of the generated steam, so as to speed up the time, ensure the effect and efficiency of sterilization, and better adapt to different scenes and environments.

Preferably, after the washing machine controls the temperature of the steam generated by the steam generating device from a to b, the temperature in the inner tub is monitored in real time, and when the temperature reaches the preset value N, the centrifugal washing process is started.

In a further solution, if steam is introduced into the inner barrel for a certain period of time T, if the temperature in the inner barrel is greater than the preset value N and exceeds a certain value, the washing machine controls the temperature of the steam generated by the steam generating device to decrease from a to c, and the c less than a.

In this case, the temperature of the incoming steam is too high, which may adversely affect the components of the washing machine, so the control device of the washing machine adjusts the temperature of the steam generated by the steam generating device in time, which not only ensures the sterilization rate, but also protects the safe operation of the washing machine.

In this solution, the washing machine controls the temperature of the steam generated by the steam generating device according to whether the temperature of the inner barrel reaches the preset value N within a certain period of time, which is more conducive to adapting to different environments and scenarios, such as winter, summer, colder regions, hotter regions, etc. , which has wider applicability.

Embodiment five

This embodiment provides a washing machine. The washing machine in this embodiment is provided with a steam generating device, and the steam outlet of the steam generating device communicates with the inner tub.

The steam generating device can be arranged on the housing and/or the disc seat, and the washing machine has a steam washing program, and adopts any one of the schemes or several combination schemes as in Embodiment 1 to Embodiment 4 to perform steam washing to achieve purpose of sterilization.

The washing machine of this embodiment can not only achieve excellent sterilization and mite removal effects, save electric energy and water resources, but also has the characteristics of short time and high efficiency, does not require users to wait for a long time, is convenient for users to use, and greatly improves user experience.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Without departing from the scope of the technical solution of the present invention, personnel can use the technical content of the above prompts to make some changes or modify them into equivalent embodiments with equivalent changes. In essence, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (15)

1. A control method for a washing machine, the washing machine is provided with a steam generating device, which is characterized in that it includes a steam washing program, and the control method includes: when the washing machine executes the steam washing program, it starts to perform centrifugal washing after passing steam into the inner tub for a certain period of time During the centrifugal washing process, the washing machine controls the rotation of the inner tub to change the contact area between the clothes and the steam; during the centrifugal washing process, the washing machine controls the inner tub to rotate for a certain period of time, then pauses for a certain period of time, and then rotates again, at such intervals; After the centrifugal washing process, the shaking process is performed. During the shaking process, the washing machine controls the rotation of the pulsator to shake the clothes; Alternatively, during the centrifugal washing process, the shaking process is performed simultaneously, and the washing machine controls the rotation of the pulsator and the inner tub at the same time, and the rotation direction of the inner tub and the pulsator is opposite; When the washing machine executes the steam washing program, after passing steam into the inner tub for a certain time T, the washing machine controls and adjusts the temperature of the steam generated by the steam generating device according to whether the temperature of the inner tub reaches the preset value N; If steam is passed into the inner barrel for a certain period of time T, and the preset value N is not reached, the temperature of the steam generated by the washing machine is controlled by the steam generating device to increase from a to b, and b is greater than a; the temperature of the steam generated by the washing machine is controlled by the steam generating device After the temperature changes from a to b, the temperature in the inner barrel is monitored in real time, and when the temperature reaches the preset value N, the centrifugal washing process is started; If steam is passed into the inner barrel for a certain time T, if the temperature in the inner barrel is greater than the preset value N and exceeds a certain value, the washing machine controls the temperature of the steam generated by the steam generating device to decrease from a to c, where c is less than a. 2. The control method of a washing machine according to claim 1, wherein the temperature range of the preset value N is 55°C-90°C. 3. The control method of a washing machine according to claim 2, wherein the preset value N is 70°C. 4. The control method of a washing machine according to any one of claims 1-3, characterized in that, in the steam washing procedure, the centrifugal washing process and the pulsator shaking process are repeatedly executed. 5. The control method of a washing machine according to claim 4, characterized in that, in the steam washing program, multiple rounds of centrifugal washing process and pulsator shaking process are repeatedly performed, and the centrifugal washing process is first performed in each round, and then the The wave wheel chattering process. 6 . The control method of a washing machine according to claim 4 , characterized in that there is a certain time interval between the previous round of pulsator shaking process and the subsequent round of centrifugal washing process, or there is no time interval. 7 . 7. The control method of a washing machine according to claim 4, characterized in that, the time of the centrifugal washing process is 1-10 times of the shaking process time. 8. The control method of a washing machine according to claim 4, characterized in that, the time of the centrifugal washing process is 2-8 times of the shaking process time. 9. The control method of a washing machine according to claim 4, characterized in that, the time of the centrifugal washing process is 5 times of the shaking process time. 10. A washing machine control method according to claim 4, characterized in that the total time of the multi-round centrifugal washing process and the pulsator shaking process is not less than 10 minutes. 11. The control method of a washing machine according to any one of claims 1-3, characterized in that, when performing the centrifugal washing process and shaking off process, the washing machine controls the steam generating device to continuously feed into the inner tub steam. 12. The control method of a washing machine according to any one of claims 1-3, characterized in that, during the centrifugal washing process and shaking process, the washing machine monitors the temperature in the inner tub in real time, and when the temperature in the inner tub is lower than Or when it is higher than the preset value N by a certain value, then adjust the amount of steam and/or the temperature of the steam introduced into the inner barrel by the steam generating device. 13. A washing machine control method according to any one of claims 1-3, characterized in that, the washing machine executes the steam washing program before the washing program, and/or, the washing machine executes the steam washing program after completing the washing program. Steam wash program as described. 14. The control method of a washing machine according to any one of claims 1-3, wherein the washing machine is turned on, and after the user puts clothes into the inner tub and selects a steam washing program, the washing machine controls to feed steam into the inner tub, Control the rotation of the inner tub after a certain period of time T of steam, and stop after the rotation of the inner tub for T1 time; then control the rotation of the pulsator to stop after T2 time; then control the rotation of the inner tub and the pulsator in turn, and repeat the aforementioned process for several rounds to complete the steam washing procedure; the washing machine stops or Start the normal wash cycle. 15. A washing machine having the control method according to any one of claims 1-14, said washing machine having a steam washing program.

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