阅读说明：本技术 一种空调器和导风板的控制方法 (Air conditioner and control method of air deflector ) 是由 苑志超 牛世波 于 2021-06-08 设计创作，主要内容包括：本发明公开了一种空调器和导风板的控制方法,该空调器包括室内风扇和导风板,所述室内风扇用于将气流经进风口引入并经室内热交换器后由至少一个出风口送出,所述导风板设置于所述出风口,用于控制所述出风口处的出风方向,该空调器还包括用于检测所述出风口处的出风温度的出风温度传感器以及控制器,该控制器被配置为：若所述空调器处于制冷模式,基于所述出风温度传感器获取所述出风温度；根据所述出风温度和用户设定的下限出风温度对所述导风板进行控制,通过检测出风温度调整导风板角度,从而可以避免出风温度过低时用户有凉风感,极大地提升了用户使用空调的舒适度。(The invention discloses an air conditioner and a control method of an air deflector, the air conditioner comprises an indoor fan and an air deflector, the indoor fan is used for leading in air flow through an air inlet and sending out the air flow through at least one air outlet after passing through an indoor heat exchanger, the air deflector is arranged at the air outlet and used for controlling the air outlet direction at the air outlet, the air conditioner also comprises an air outlet temperature sensor and a controller, the air outlet temperature sensor is used for detecting the air outlet temperature at the air outlet, and the controller is configured as: if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor; the air deflector is controlled according to the air outlet temperature and the lower limit air outlet temperature set by the user, and the angle of the air deflector is adjusted by detecting the air outlet temperature, so that the cold wind feeling of the user when the air outlet temperature is too low can be avoided, and the comfort level of the user in using the air conditioner is greatly improved.)

1. An air conditioner comprising:

the indoor fan is used for introducing airflow through the air inlet and sending the airflow out through the at least one air outlet after the airflow passes through the indoor heat exchanger;

the air deflector is arranged at the air outlet and used for controlling the air outlet direction at the air outlet;

it is characterized by also comprising:

the air outlet temperature sensor is used for detecting the air outlet temperature at the air outlet;

a controller configured to:

if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor;

and controlling the air deflector according to the air outlet temperature and the lower limit air outlet temperature set by a user.

2. The air conditioner according to claim 1, wherein the control appliance body is configured to:

and if the air outlet temperature is less than the lower limit air outlet temperature, controlling the air deflector to swing to a preset minimum angle, and controlling the air deflector to recover to the current set angle when the air outlet temperature is not less than the lower limit air outlet temperature.

3. The air conditioner according to claim 1, wherein the control appliance body is configured to:

if the difference value of the air outlet temperature minus the lower limit air outlet temperature is larger than a first set value, controlling the air deflector to swing to a first preset angle;

if the difference value is not larger than the first set value and is larger than a second set value, controlling the air deflector to swing to a second preset angle;

if the difference value is not larger than the second set value and is larger than zero, controlling the air deflector to swing to a third preset angle;

if the difference value is not larger than zero, controlling the air deflector to swing to a preset minimum angle;

the first preset angle is larger than the second preset angle, the second preset angle is larger than the third preset angle, and the third preset angle is larger than the preset minimum angle.

4. The air conditioner of claim 1, wherein the controller is further configured to:

and if the forced set angle for the air deflector input by the user is received, swinging the air deflector to the forced set angle and keeping the angle unchanged.

5. The air conditioner according to any one of claims 1 to 5, wherein if the number of the outlets is greater than one, each outlet is provided with the outlet air temperature sensor, and each air deflector is independently controlled according to a control instruction of a user or according to the outlet air temperature and the lower limit outlet air temperature.

6. The air conditioner according to claim 5, wherein the indoor fan is provided on a ceiling in a room, the outlet port includes a first outlet port, a second outlet port, a third outlet port, and a fourth outlet port which are evenly distributed in four directions around the indoor fan, the first outlet port is provided with a first air deflector, the second outlet port is provided with a second air deflector, the third outlet port is provided with a third air deflector, and the fourth outlet port is provided with a fourth air deflector.

7. A control method of an air deflector is applied to an air conditioner comprising an indoor fan and the air deflector, wherein the indoor fan is used for leading in air flow through an air inlet and sending out the air flow through at least one air outlet after passing through an indoor heat exchanger, the air deflector is arranged at the air outlet and used for controlling the air outlet direction at the air outlet, the air conditioner is characterized by further comprising an air outlet temperature sensor and a controller, the air outlet temperature sensor is used for detecting the air outlet temperature at the air outlet, and the method is applied to the controller and comprises the following steps:

if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor;

and controlling the air deflector according to the air outlet temperature and the lower limit air outlet temperature set by a user.

8. The method according to claim 7, wherein the air deflector is controlled according to the outlet air temperature and a lower limit outlet air temperature set by a user, specifically:

and if the air outlet temperature is less than the lower limit air outlet temperature, controlling the air deflector to swing to a preset minimum angle, and controlling the air deflector to recover to the current set angle when the air outlet temperature is not less than the lower limit air outlet temperature.

9. The method according to claim 7, wherein the air deflector is controlled according to the outlet air temperature and a lower limit outlet air temperature set by a user, specifically:

if the difference value of the air outlet temperature minus the lower limit air outlet temperature is larger than a first set value, controlling the air deflector to swing to a first preset angle;

if the difference value is not larger than the first set value and is larger than a second set value, controlling the air deflector to swing to a second preset angle;

if the difference value is not larger than the second set value and is larger than zero, controlling the air deflector to swing to a third preset angle;

if the difference value is not larger than zero, controlling the air deflector to swing to a preset minimum angle;

the first preset angle is larger than the second preset angle, the second preset angle is larger than the third preset angle, and the third preset angle is larger than the preset minimum angle.

10. The method of claim 7, wherein the method further comprises:

and if the forced set angle for the air deflector input by the user is received, swinging the air deflector to the forced set angle and keeping the angle unchanged.

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioner and a control method of an air deflector.

Background

Air conditioners are used in various applications, such as in the home, in vehicles, and in work environments, to greatly improve the comfort of people.

In the prior art, the temperature set by a user through a controller (including a wire controller, a remote controller and the like) is the temperature which can be reached in a desired room, namely, the temperature of an air outlet of an indoor fan is not controlled by taking the room temperature as a target for the operation of an air conditioner. In the process of refrigeration, in order to enable the room temperature to reach the temperature set by the user as soon as possible, the temperature of the air outlet is often very low, and the air outlet with the very low temperature blows on the user and causes the user to feel very uncomfortable.

Therefore, how to provide an air conditioner capable of preventing the air with too low temperature from being blown directly to the user during refrigeration is a technical problem to be solved at present.

Disclosure of Invention

The invention provides an air conditioner, which is used for solving the technical problem that the air conditioner in the prior art is easy to blow air with too low temperature directly to a user when refrigerating, so that the user is uncomfortable.

This air conditioner includes:

the indoor fan is used for introducing airflow through the air inlet and sending the airflow out through the at least one air outlet after the airflow passes through the indoor heat exchanger;

the air deflector is arranged at the air outlet and used for controlling the air outlet direction at the air outlet;

further comprising:

the air outlet temperature sensor is used for detecting the air outlet temperature at the air outlet;

a controller configured to:

if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor;

and controlling the air deflector according to the air outlet temperature and the lower limit air outlet temperature set by a user.

In some embodiments of the present application, the control appliance is configured to:

and if the air outlet temperature is less than the lower limit air outlet temperature, controlling the air deflector to swing to a preset minimum angle, and controlling the air deflector to recover to the current set angle when the air outlet temperature is not less than the lower limit air outlet temperature.

In some embodiments of the present application, the control appliance is configured to:

if the difference value of the air outlet temperature minus the lower limit air outlet temperature is larger than a first set value, controlling the air deflector to swing to a first preset angle;

if the difference value is not larger than the first set value and is larger than a second set value, controlling the air deflector to swing to a second preset angle;

if the difference value is not larger than the second set value and is larger than zero, controlling the air deflector to swing to a third preset angle;

if the difference value is not larger than zero, controlling the air deflector to swing to a preset minimum angle;

the first preset angle is larger than the second preset angle, the second preset angle is larger than the third preset angle, and the third preset angle is larger than the preset minimum angle.

In some embodiments of the present application, the controller is further configured to:

and if the forced set angle for the air deflector input by the user is received, swinging the air deflector to the forced set angle and keeping the angle unchanged.

In some embodiments of the present application, if the number of the air outlets is greater than one, each of the air outlets is provided with the air outlet temperature sensor, and each of the air deflectors is independently controlled according to a control instruction of a user or according to the air outlet temperature and the lower limit air outlet temperature.

In some embodiments of the present application, the indoor fan is disposed on an indoor ceiling, the air outlets include a first air outlet, a second air outlet, a third air outlet, and a fourth air outlet that are uniformly distributed around the indoor fan in four directions, the first air outlet is provided with a first air deflector, the second air outlet is provided with a second air deflector, the third air outlet is provided with a third air deflector, and the fourth air outlet is provided with a fourth air deflector.

Correspondingly, the invention also provides a control method of the air deflector, which is applied to an air conditioner comprising an indoor fan and the air deflector, wherein the indoor fan is used for introducing airflow through an air inlet and sending the airflow out through at least one air outlet after the airflow passes through an indoor heat exchanger, the air deflector is arranged at the air outlet and is used for controlling the air outlet direction at the air outlet, the air conditioner further comprises an air outlet temperature sensor and a controller, the air outlet temperature sensor is used for detecting the air outlet temperature at the air outlet, and the method is applied to the controller and comprises the following steps:

if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor;

and controlling the air deflector according to the air outlet temperature and the lower limit air outlet temperature set by a user.

In some embodiments of the present application, the air deflector is controlled according to the air outlet temperature and a lower limit air outlet temperature set by a user, specifically:

and if the air outlet temperature is less than the lower limit air outlet temperature, controlling the air deflector to swing to a preset minimum angle, and controlling the air deflector to recover to the current set angle when the air outlet temperature is not less than the lower limit air outlet temperature.

In some embodiments of the present application, the air deflector is controlled according to the air outlet temperature and a lower limit air outlet temperature set by a user, specifically:

if the difference value of the air outlet temperature minus the lower limit air outlet temperature is larger than a first set value, controlling the air deflector to swing to a first preset angle;

if the difference value is not larger than the first set value and is larger than a second set value, controlling the air deflector to swing to a second preset angle;

if the difference value is not larger than the second set value and is larger than zero, controlling the air deflector to swing to a third preset angle;

if the difference value is not larger than zero, controlling the air deflector to swing to a preset minimum angle;

the first preset angle is larger than the second preset angle, the second preset angle is larger than the third preset angle, and the third preset angle is larger than the preset minimum angle.

In some embodiments of the present application, the method further comprises:

if the forced set angle of the air deflector input by the user is received, the air deflector is swung to the forced set angle and is kept unchanged

Compared with the prior art, the invention has the following beneficial effects:

by applying the technical scheme, in the air conditioner comprising the indoor fan and the air deflector, the indoor fan is used for introducing air flow through the air inlet and sending the air flow out of the air outlet through the indoor heat exchanger, the air deflector is arranged at the air outlet and used for controlling the air outlet direction at the air outlet, the air conditioner further comprises an air outlet temperature sensor and a controller, the air outlet temperature sensor is used for detecting the air outlet temperature at the air outlet, and the controller is configured to: if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor; the air deflector is controlled according to the air outlet temperature and the lower limit air outlet temperature set by the user, and the angle of the air deflector is adjusted by detecting the air outlet temperature, so that the cold wind feeling of the user when the air outlet temperature is too low can be avoided, and the comfort level of the user in using the air conditioner is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;

FIG. 2 is a schematic view of the position of the air deflector in an embodiment of the invention;

FIG. 3 is a schematic view of an angle of the air deflector in an embodiment of the invention;

fig. 4 is a schematic flow chart illustrating a control method of an air deflector according to an embodiment of the present invention;

in fig. 2: the air conditioner comprises a first air guide plate 1, a second air guide plate 2, a third air guide plate 3, a fourth air guide plate 4 and an indoor fan 5.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The air conditioner performs a refrigeration cycle by using a compressor, a condenser, an expansion valve, and an evaporator in the present application. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas, the discharged refrigerant gas flows into a condenser, the condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through a condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

As shown in fig. 1, the air conditioner includes:

an indoor fan 100 for introducing an air flow through an air inlet and sending out the air flow through at least one air outlet after passing through an indoor heat exchanger;

the air deflector 200 is arranged at the air outlet and used for controlling the air outlet direction at the air outlet;

further comprising:

an air outlet temperature sensor 300 for detecting the air outlet temperature at the air outlet;

a controller 400 configured to:

if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor;

and controlling the air deflector according to the air outlet temperature and the lower limit air outlet temperature set by a user.

In this embodiment, if the air conditioner is in the cooling mode, the air outlet of the indoor fan blows out cold air, the user can send a lower-limit air outlet temperature to the controller through the remote controller, the line controller, or the user terminal, the controller obtains the air outlet temperature based on the air outlet temperature sensor, and the air deflector is controlled according to the air outlet temperature and the lower-limit air outlet temperature.

In order to accurately control the air deflector, in some embodiments of the present application, the control device is configured to:

and if the air outlet temperature is less than the lower limit air outlet temperature, controlling the air deflector to swing to a preset minimum angle, and controlling the air deflector to recover to the current set angle when the air outlet temperature is not less than the lower limit air outlet temperature.

In this embodiment, the controller may swing the air deflector to the current setting angle according to an angle preset by a user, and if the outlet air temperature is less than the lower limit outlet air temperature, it indicates that the outlet air temperature is too low at this time, and the direct-blowing user may feel discomfort, so that the air deflector is controlled to swing to the preset minimum angle, and the user may not feel a blowing feeling at the preset minimum angle. When the air outlet temperature is not less than the lower limit air outlet temperature, the air deflector can be restored to the current set angle.

In order to accurately control the air deflector, in some embodiments of the present application, the control device is configured to:

if the difference value of the air outlet temperature minus the lower limit air outlet temperature is larger than a first set value, controlling the air deflector to swing to a first preset angle;

if the difference value is not larger than the first set value and is larger than a second set value, controlling the air deflector to swing to a second preset angle;

if the difference value is not larger than the second set value and is larger than zero, controlling the air deflector to swing to a third preset angle;

if the difference value is not larger than zero, controlling the air deflector to swing to a preset minimum angle;

the first preset angle is larger than the second preset angle, the second preset angle is larger than the third preset angle, and the third preset angle is larger than the preset minimum angle.

In this implementation, the user can adjust the control mode of the air deflector to the automatic mode, that is, a specific set angle does not need to be output, and the controller can automatically control the air deflector according to the difference value obtained by subtracting the lower limit air outlet temperature from the air outlet temperature. The air deflector comprises a plurality of adjustable angles, the larger the difference value is, the larger the angle of the air deflector is, when the difference value is zero, the air deflector is controlled to swing to a preset minimum angle, and a user cannot feel a blowing feeling under the preset minimum angle.

In the concrete application scene of this application, including four aviation baffles, set up the angle of aviation baffle to ^ A,. sub-B,. sub-C,. sub-D to stipulate: the angle A is less than the angle B is less than the angle C is less than the angle D, and each angle is shown in fig. 3.

When the delta T is larger than m, the angle wind of the air deflector is < D;

when n is more than delta T and less than or equal to m, the angle wind of the air deflector is less than C;

when delta T is more than 0 and less than or equal to n, the angle wind of the air deflector is < B;

when the delta T is less than or equal to 0, the angle wind of the air deflector is < A.

And the delta T is Tno-Tso, the Tso is the lower limit air outlet temperature set by the user, and the Tno is the detection value of the air outlet temperature.

The skilled person can also flexibly set other preset angles without affecting the scope of protection of the present application.

To enhance the user experience, in some embodiments of the present application, the controller is further configured to:

and if the forced set angle for the air deflector input by the user is received, swinging the air deflector to the forced set angle and keeping the angle unchanged.

In this embodiment, in some cases, the user wants to maintain the air deflector at a specific angle, and if the user inputs a forced setting angle for the air deflector, the controller will not control the air deflector according to the air outlet temperature and the lower limit air outlet temperature, and will directly swing the air deflector to the forced setting angle and keep the angle unchanged.

In order to further improve the flexibility of controlling the air deflectors, in some embodiments of the present disclosure, if the number of the air outlets is greater than one, each of the air outlets is provided with the air outlet temperature sensor, and each of the air deflectors is independently controlled according to a control instruction of a user or according to the air outlet temperature and the lower limit air outlet temperature.

In this embodiment, if the number of the air outlets is greater than one, the air outlet temperature at each air outlet may not be uniform, each air outlet is provided with an air outlet temperature sensor, the air deflectors at each air outlet may be independently controlled according to the requirements of the user, the user may set different set angles or different forced set angles for each air deflector, or independently control each air deflector according to the air outlet temperature and the lower limit air outlet temperature, for example, when the lower limit air outlet temperature is set by the user to 12 ℃, when the air outlet temperature detected by the No. 1 air outlet is lower than 12 ℃ and the air outlet temperature detected by the other air outlets is higher than 12 ℃, only the air deflector at the No. 1 air outlet is adjusted to the non-wind-sensing position (i.e., the preset minimum angle) while the other air deflectors are unchanged.

In order to ensure a good air outlet effect, in some embodiments of the present application, the indoor fan is disposed on an indoor ceiling, the air outlet includes a first air outlet, a second air outlet, a third air outlet, and a fourth air outlet, which are uniformly distributed around the indoor fan in four directions, the first air outlet is provided with a first air deflector, the second air outlet is provided with a second air deflector, the third air outlet is provided with a third air deflector, and the fourth air outlet is provided with a fourth air deflector.

In this embodiment, the indoor fan is disposed on an indoor ceiling, four air outlets are disposed at four positions uniformly distributed around the indoor fan, and each air outlet is provided with an air deflector. In a specific application scenario of the present application, as shown in fig. 2, a position schematic diagram of the air deflectors is shown, in the middle portion of the diagram, an indoor fan 1 is provided, and the first air deflector 1, the second air deflector 2, the third air deflector 3, and the fourth air deflector 4 are located at four air outlets uniformly distributed around an indoor fan 5.

By applying the technical scheme, in the air conditioner comprising the indoor fan and the air deflector, the indoor fan is used for introducing air flow through the air inlet and sending the air flow out of the air outlet through the indoor heat exchanger, the air deflector is arranged at the air outlet and used for controlling the air outlet direction at the air outlet, the air conditioner further comprises an air outlet temperature sensor and a controller, the air outlet temperature sensor is used for detecting the air outlet temperature at the air outlet, and the controller is configured to: if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor; the air deflector is controlled according to the air outlet temperature and the lower limit air outlet temperature set by the user, and the angle of the air deflector is adjusted by detecting the air outlet temperature, so that the cold wind feeling of the user when the air outlet temperature is too low can be avoided, and the comfort level of the user in using the air conditioner is greatly improved.

Corresponding to the air conditioner in the embodiment of the present application, the embodiment of the present application further provides a control method of an air deflector, which is applied to an air conditioner including an indoor fan and an air deflector, wherein the indoor fan is configured to introduce an air flow through an air inlet and send the air flow out through at least one air outlet after passing through an indoor heat exchanger, the air deflector is disposed at the air outlet and is configured to control an air outlet direction at the air outlet, the air conditioner further includes an air outlet temperature sensor and a controller, the air outlet temperature sensor is configured to detect an air outlet temperature at the air outlet, and the method is applied to the controller, and includes the following steps, as shown in fig. 4:

step S101, if the air conditioner is in a refrigeration mode, acquiring the air outlet temperature based on the air outlet temperature sensor;

and S102, controlling the air deflector according to the air outlet temperature and the lower limit air outlet temperature set by a user.

In order to accurately control the air deflector, in some embodiments of the present application, the air deflector is controlled according to the air outlet temperature and a lower limit air outlet temperature set by a user, specifically:

and if the air outlet temperature is less than the lower limit air outlet temperature, controlling the air deflector to swing to a preset minimum angle, and controlling the air deflector to recover to the current set angle when the air outlet temperature is not less than the lower limit air outlet temperature.

In order to accurately control the air deflector, in some embodiments of the present application, the air deflector is controlled according to the air outlet temperature and a lower limit air outlet temperature set by a user, specifically:

if the difference value of the air outlet temperature minus the lower limit air outlet temperature is larger than a first set value, controlling the air deflector to swing to a first preset angle;

if the difference value is not larger than the first set value and is larger than a second set value, controlling the air deflector to swing to a second preset angle;

if the difference value is not larger than the second set value and is larger than zero, controlling the air deflector to swing to a third preset angle;

if the difference value is not larger than zero, controlling the air deflector to swing to a preset minimum angle;

the first preset angle is larger than the second preset angle, the second preset angle is larger than the third preset angle, and the third preset angle is larger than the preset minimum angle.

To improve the user experience, in some embodiments of the present application, the method further comprises:

and if the forced set angle for the air deflector input by the user is received, swinging the air deflector to the forced set angle and keeping the angle unchanged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.