CN110292338B - Drawer type household appliance and door opening and closing control method thereof - Google Patents

Abstract

The invention discloses a drawer type household appliance and a door opening and closing control method thereof, and belongs to the technical field of household appliances. The controller controls the door opening and closing component to act, so that the automatic door opening and closing of the household appliance is realized; the door opening and closing assembly enables the drawer to be automatically closed or opened through attractive force or repulsive force generated by electromagnetic induction, and the current speed of the drawer is detected through the speed sensor in real time to judge whether the drawer acts or not; and the current can be adjusted to change the attractive force or the repulsive force so as to adjust the movement speed of the drawer, so that the drawer cannot be violently bumped when being closed or opened.

Description

A drawer type household appliance and its door opening control method

technical field

The invention relates to the related technical field of household appliances, in particular to a drawer type household appliance and a control method for opening and closing doors thereof.

Background technique

In existing drawer-type household appliances such as a drawer-type dishwasher, when opening and closing the drawer of the dishwasher, the handle on the door body is manually pulled or pushed to close or open the door body.

However, in the drawer type dishwasher, the door body is integrated with the shelf for placing tableware. When placing more tableware, it is time-consuming and laborious to open and close the door; When there are more or less tableware on the shelf, if the force is too high, the shelf will be pulled open or closed suddenly, which will easily cause collision between the tableware, affect the service life of the tableware, and cause a poor user experience.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a drawer-type household appliance and a door opening and closing control method thereof, which can realize automatic closing or opening of the door of the household appliance, and can adjust the strength of closing or opening the door according to the size of the load, so as to improve the user experience.

For this purpose, the present invention adopts the following technical solutions:

A drawer-type household appliance, comprising an appliance body and a drawer that can slide relative to it, and a controller, a speed sensor for detecting the movement speed of the drawer and electrically connected to the controller, and a speed sensor electrically connected to the controller and connected to the controller. A switch door assembly capable of automatically closing or opening the drawer through the attractive or repulsive force generated by electromagnetic induction.

Further, an installation chamber is opened in the electrical appliance body, and the drawer can slide relative to the installation chamber;

The door switch assembly includes a first iron core arranged on the bottom wall of the installation chamber, a first electromagnetic coil wound on the first iron core; arranged on the drawer and opposite to the first iron core The second iron core, and the second electromagnetic coil wound on the second iron core; the first electromagnetic coil and the second electromagnetic coil are both connected to the controller.

Further, the drawer is provided with a limit switch connected to the controller, and the inner wall of the installation chamber is provided with a first limit post capable of closing the limit switch when the drawer is completely closed, and a second limit post capable of closing the limit switch when the drawer is fully opened.

Further, the first electromagnetic coil and the second electromagnetic coil are respectively connected with a first switch and a second switch for controlling power-on and power-off, and both the first switch and the second switch are connected to the controller.

In order to achieve the above object, the present invention also provides a door opening and closing control method for the above drawer-type household appliance. When the drawer is opened or closed, the minimum current that can make the drawer move when the drawer is unloaded is used as the initial current to provide a control method for making the drawer move. Attractive or repulsive force, and judges whether the drawer starts to move according to the speed of the drawer, and gradually increases the current when the drawer does not start to move to provide the attractive or repulsive force to make the drawer move until the drawer moves.

Further, the controller acquires the door closing signal and the door opening signal in real time, and controls both the first electromagnetic coil and the second electromagnetic coil to energize to make the drawer move when the door closing signal or the door opening signal is acquired.

Further, during the working process of the household appliance, the drawer is in a closed state and both the first electromagnetic coil and the second electromagnetic coil are energized so that the drawer is in a locked state.

As a preferred technical solution, after the drawer starts to move, it continues to run at the current current until the speed of the drawer reaches the first preset speed, and then the direction of the current is changed to decelerate the drawer.

As a preferred technical solution, after the drawer moves, the current current increases by a preset current value per unit time and changes until the speed of the drawer reaches the first preset speed, changing the direction of the current to decelerate the drawer.

As a preferred technical solution, during the deceleration movement of the drawer, when the limit switch is closed, the current speed of the drawer is less than or equal to the second preset speed.

Beneficial effects of the present invention: the present invention controls the action of the door switch assembly through the controller to realize automatic door opening and closing of household appliances; and the door switch assembly automatically closes or opens the drawer through the attractive force or repulsive force generated by electromagnetic induction, and passes the speed sensor The current speed of the drawer is detected in real time to determine whether the drawer is moving; and the magnitude of the current can be adjusted to change the size of the attractive or repulsive force, so as to adjust the movement speed of the drawer, so that there will be no violent impact when the drawer is closed or opened.

The invention provides a door opening and closing control method for a drawer-type household appliance. The minimum current that can make the drawer move when the drawer is unloaded is used as the initial current, and whether the drawer starts to move is judged according to the speed of the drawer, and gradually increases when the drawer does not start to move. current until the drawer moves. Using the above method to make the drawer move to realize the automatic closing or opening of the drawer, because the minimum current that can make the drawer move when the drawer is no-load is used as the initial current, the initial movement speed of the drawer can be reduced, and there will be no sudden movement. Violent collision of tableware in the dishwasher is avoided, and user satisfaction is improved.

Description of drawings

Fig. 1 is the structural representation of the drawer type household appliance of the present invention;

2 is a flowchart of a method for controlling a door opening and closing of a drawer-type household appliance according to Embodiment 1 of the present invention;

3 is a flowchart of a method for controlling a door opening and closing of a drawer-type household appliance according to Embodiment 2 of the present invention;

4 is a flowchart of a method for controlling a door opening and closing of a drawer-type household appliance according to Embodiment 3 of the present invention;

FIG. 5 is a flowchart of a method for controlling a door opening and closing of a drawer type household appliance according to Embodiment 4 of the present invention.

In the picture:

1. Electrical appliance body; 2. Drawer; 3. Door switch assembly; 31. First iron core; 32. First electromagnetic coil; 33. Second iron core; 34. Second electromagnetic coil; 41. Limit switch; 42 , the first limit column; 43, the second limit column.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show some but not all of the parts related to the present invention.

Example 1

As shown in FIG. 1 , the present embodiment provides a drawer-type household appliance. The above-mentioned drawer-type household appliance may be a dishwasher or other drawer-type household appliances. In this embodiment, a drawer-type dishwasher is used as an example. Detailed description.

The drawer type dishwasher includes an electrical appliance body 1, a drawer 2 that can slide relative to it, and a controller (not shown in the figure) for detecting the movement speed of the drawer 2 and electrically connected to a speed sensor (in the figure) of the controller. (not shown), and an open/close door assembly 3 electrically connected to the controller and capable of automatically closing or opening the drawer 2 through the attractive or repulsive force generated by electromagnetic induction.

In this embodiment, the controller controls the action of the door switch assembly 3 to realize the automatic door opening and closing of the dishwasher; and the door switch assembly 3 automatically closes or opens the drawer 2 through the attractive force or repulsive force generated by electromagnetic induction, and real-time through the speed sensor Detect the current speed of the drawer 2 to determine whether the drawer 2 is moving; and can adjust the current size to make the size of the attractive or repulsive force change, so as to adjust the movement speed of the drawer 2, so that the drawer 2 will not be violently impacted when it is closed or opened, and The tableware in the drawer 2 can be prevented from colliding.

An installation chamber is opened in the electrical appliance body 1 , and the drawer 2 can slide relative to the installation chamber. The drawer 2 includes a shelf slidably arranged in the installation chamber, and a door connected to the shelf. The door switch assembly 3 includes a first iron core 31 arranged on the bottom wall of the installation chamber, a first electromagnetic coil 32 wound on the first iron core 31; A second iron core 33 opposite to the iron core 31, and a second electromagnetic coil 34 wound on the second iron core 33; the first electromagnetic coil 32 and the second electromagnetic coil 34 are both connected to the control device.

Specifically, the first iron core 31 is arranged on the bottom wall of the installation chamber, and the second iron core 33 is arranged on the side wall of the shelf opposite to the bottom wall of the installation chamber; that is, the first iron core 31 and the second iron core 33 are all located in the dishwasher. When the first electromagnetic coil 32 and the second electromagnetic coil 34 are energized, the user will not accidentally touch the first electromagnetic coil 32 or the second electromagnetic coil 34. safety performance.

When the first electromagnetic coil 32 and the second electromagnetic coil 34 are energized, the first iron core 31 and the second iron core 33 generate magnetism, and the first iron core 31 and the second iron core 33 attract or repel each other by adjusting the current direction. . When the drawer 2 needs to be closed, the first iron core 31 and the second iron core 33 are attracted to each other by electromagnetic induction to make the drawer 2 move; when the drawer 2 needs to be opened, the first iron core 31 is caused by electromagnetic induction. A repulsive force is generated with the second iron core 33 to move the drawer 2 .

The drawer 2 is provided with a limit switch 41 connected to the controller, and the inner wall of the installation chamber is provided with a first limit post that can close the limit switch 41 when the drawer 2 is completely closed 42, and a second limit post 43 capable of closing the limit switch 41 when the drawer 2 is fully opened. The movement range of the drawer 2 is limited by the cooperation of the limit switch 41 with the first limit post 42 and the second limit post 43 , and when the limit switch 41 is closed, the first electromagnetic coil 32 and the second electromagnetic coil 34 are disconnected Electricity, or reducing the current, makes the generated attractive or repulsive force less than the maximum static friction force that can make the drawer 2 move.

It is also possible to limit the stroke of the drawer 2 by means of one limit post and two limit switches, that is, a limit post is set on the drawer 2, and two limit switches are set on the electrical body 1, and the limit post is set in the middle. When one limit switch is closed, the drawer 2 is fully opened/closed, and when the limit post closes the other limit switch, the drawer 2 is fully closed/opened.

The first electromagnetic coil 32 and the second electromagnetic coil 34 are respectively connected with a first switch and a second switch for controlling power-on and power-off, and the first switch and the second switch are both connected to the controller. The first solenoid coil 32 and the second solenoid coil 34 are de-energized or energized by the simultaneous opening or closing of the first switch and the second switch.

This embodiment also provides a door opening and closing control method for the above drawer-type household appliance. When opening or closing the drawer, the minimum current that can make the drawer 2 move when the drawer 2 is unloaded is used as the initial current to provide the attractive force for making the drawer move. or repulsive force, and judge whether the drawer 2 starts to move according to the speed of the drawer 2, and gradually increase the current when the drawer 2 does not start to move to increase the attraction or repulsion force until the drawer 2 moves.

The drawer 2 is actuated by the above method to realize the automatic closing or opening of the drawer 2. Since the minimum current that can make the drawer 2 act when the drawer 2 is unloaded is used as the initial current, the first electromagnetic coil 32 and the second electromagnetic The electromagnetic coil 34 generates an attractive force or a repulsive force, which can make the initial movement speed of the drawer 2 small, avoid sudden movement, avoid violent collision of tableware in the dishwasher, and improve user satisfaction.

FIG. 2 is a flowchart of the method for controlling the door opening and closing of the drawer type household appliance according to the present embodiment, and the method will be described in detail with reference to FIG. 2 , and the details are as follows.

Step 1. When the drawer is opened or closed, the minimum current that can make the drawer move when the drawer is empty is used as the initial current to provide the attractive or repulsive force to make the drawer move, and determine whether the speed of the drawer is zero.

The minimum current that can make the drawer 2 move when the drawer 2 is unloaded refers to the moment when the drawer 2 is unloaded from not moving to moving, when the attractive or repulsive force generated by the electromagnetic induction that enables the drawer to move is equal to the maximum static friction force the current. The size of the minimum current that can make the drawer 2 move when the drawer 2 is empty is determined according to the model of the dishwasher. Since the weight of the drawer 2 is different for different models of dishwashers, the corresponding drawer 2 can make the drawer 2 move when the drawer 2 is empty. The magnitude of the minimum current is also different. The size of the minimum current that can make the drawer 2 move when the drawer 2 of each model of dishwasher is empty can be determined according to repeated tests.

Step 2. If yes, the drawer does not move; if not, the drawer does not move.

In this embodiment, the maximum static friction force of the drawer 2 when it is not loaded and the sliding friction force of the drawer 2 when it is not loaded are considered to be equal.

Using the minimum current as the initial current can make the drawer 2 start to move slowly, without causing the drawer 2 to suddenly have a large speed, and reducing the shaking of the tableware in the drawer 2 .

Embodiment 2

This embodiment further optimizes the door opening and closing control method of the drawer type household appliance described in the first embodiment on the basis of the first embodiment. FIG. 3 is a flowchart of a method for controlling door opening and closing of a drawer type household appliance according to this embodiment, and the method will be described in detail with reference to FIG. 3 , and the details are as follows.

Step 1: The controller acquires the door closing signal and the door opening signal in real time, and controls both the first electromagnetic coil and the second electromagnetic coil to energize to make the drawer move when the door closing signal or the door opening signal is acquired.

The dishwasher in this embodiment is provided with an open button for opening the drawer 2 and a close button for closing the drawer 2. The open button and the close button are both connected to the controller. When the open button or the close button is pressed, the controller will Received door opening signal or door closing signal.

After the dishwasher finishes one wash, the drawer 2 needs to be opened so that the user can take out the dishes. Therefore, the corresponding washing completion signal of the dishwasher can be acquired as the door opening signal after the washing machine finishes washing each time.

When the controller obtains the signal to close the door or to open the door, the first electromagnetic coil 32 and the second electromagnetic coil 34 are energized, so that an attractive force or a repulsive force is generated between the drawer 2 and the electrical appliance body 1, so that the drawer 2 starts to move.

Step 2: Take the minimum current that can make the drawer move when the drawer is unloaded as the initial current to provide the attractive force or repulsive force to make the drawer move, and determine whether the speed of the drawer is zero, if so, the drawer does not move, and step 3 is performed; If not, the dishwasher starts to operate and executes step four.

Step 3: Gradually increase the current to increase the attractive or repulsive force until the drawer moves, and then perform Step 4.

In this embodiment, the initial current is changed by increasing the predetermined current value per unit time, denoting the initial current as I, the predetermined current value as ΔI, and the minimum current as I ₀ , then the initial current value I=I ₀ +N*ΔI, where N=1, 2, 3, . . .

In order to prevent the tableware in the drawer 2 from colliding with the sudden increase in the speed of the drawer 2, the predetermined current value △I should not be too large, so that the drawer will accelerate slowly after starting to move; the predetermined current value △I can be determined according to repeated tests. The specific size of I.

Step 4: Continue to run with the current current until the speed of the drawer reaches the first preset speed, change the direction of the current to make the drawer perform deceleration motion.

Since the maximum static friction force when the drawer 2 is no-load in this embodiment is equal to the sliding friction force when the drawer 2 is running without a load, the attractive or repulsive force on the drawer 2 is equal to the maximum static friction during the continuous operation with the current current. force to make the drawer 2 move at a uniform speed.

The speed of the drawer 2 is detected in real time by the speed sensor. When the speed of the drawer 2 reaches the first preset speed, the direction of the current is changed so that the drawer 2 is acted by the opposite force and starts to decelerate, providing enough distance for the drawer 2 to decelerate. , to prevent the limit switch 41 from touching the first limit post 42 or the second limit post 43 when the movement speed is too large, causing the drawer 2 to stop suddenly and resulting in a violent collision, so that the tableware in the drawer 2 is damaged due to the violent collision. .

Step 5. Determine whether the limit switch is closed, if so, the drawer is fully closed or fully opened.

During the movement of the drawer 2, if the limit switch 41 touches the first limit post 42 or the second limit post 43, the limit switch 41 will be closed, indicating that the drawer 2 is completely closed or fully opened.

During the deceleration movement of the drawer 2, it is necessary to ensure that when the limit switch 41 is closed, the current speed of the drawer 2 is less than or equal to the second preset speed; by setting the second preset speed, when the drawer 2 stops moving, the speed of the drawer 2 The velocity is just zero or less so that it doesn't produce a violent impact. The magnitude of the second preset speed can be determined by repeated experiments.

In this embodiment, during the operation of the dishwasher, if the drawer 2 is in a closed state, both the first electromagnetic coil 32 and the second electromagnetic coil 34 are energized to keep the drawer 2 in a locked state. At this time, there is a mutual attraction force between the drawer 2 and the electrical appliance body 1, but the size of the attraction force is smaller than the current maximum static friction force of the drawer 2, so as to prevent the drawer 2 from moving due to the excessive force caused by the force of the first limit post 42 It can not act, and plays the role of protecting the limit switch 41 and the first limit post 42 .

Moreover, since the dishwasher is in the working state, the drawer 2 is locked due to the attractive attraction between the drawer 2 and the electrical body, so as to avoid the outflow of washing water or the opening of the drawer 2 during the drying process due to the accidental opening of the drawer 2. and scald the user.

When the dishwasher is not in operation, both the first switch and the second switch are turned on, that is, the first electromagnetic coil 32 and the second electromagnetic coil 34 are both in a power-off state, which saves electricity and avoids human touch. The first electromagnetic coil 32 and the second electromagnetic coil 34 are electrocuted.

Embodiment 2

The difference between this embodiment and the first embodiment is that, as shown in FIG. 4 , after the drawer moves, the current current increases by the preset current value per unit time and changes until the speed of the drawer reaches the first preset speed, changing the current direction to make The drawer does a deceleration movement.

For different models of dishwashers, due to the different strokes of the drawer movement, the method described in this embodiment can be used for a dishwasher with a larger stroke of the drawer movement, which can effectively reduce the time for closing or opening the drawer and improve work efficiency .

Embodiment 3

The difference between this embodiment and the first embodiment is that after the drawer moves, the drawer can also move according to the changing trend of acceleration, uniform speed and deceleration. Specifically, referring to the flowchart shown in FIG. 5 , that is, after the drawer moves, the current current increases by a preset current value per unit time, moves for a preset time, and then runs at a stable current until the speed of the drawer reaches the first preset speed. When , change the current direction to make the drawer decelerate. The preset time is determined according to multiple tests, and the preset time corresponding to different models of dishwashers may be different.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (7)

1. A door opening and closing control method for a drawer-type household appliance, the drawer-type household appliance comprising an electrical appliance body (1) and a drawer (2) capable of relative sliding with it, characterized in that it also includes a controller for detecting the drawer (2). ) a speed sensor that is electrically connected to the controller and electrically connected to the controller, and a door switch assembly that is electrically connected to the controller and capable of automatically closing or opening the drawer (2) through the attractive or repulsive force generated by electromagnetic induction (3); The door-opening control method includes the following steps: When opening or closing the drawer, the minimum current that can make the drawer move when the drawer is unloaded is used as the initial current to provide the attractive or repulsive force to make the drawer move, and judge whether the drawer starts to move according to the speed of the drawer, and if the drawer does not start to move Gradually increase the current to increase the attractive or repulsive force until the drawer moves; When the speed of the drawer is zero, the drawer does not move; when the speed of the drawer is not zero, the drawer has moved; after the drawer starts to move, it continues to run at the current current until the speed of the drawer reaches the first preset speed, and the current direction is changed Make the drawer do a deceleration motion. 2 . The door opening and closing control method for a drawer-type household appliance according to claim 1 , wherein an installation cavity is opened in the electric appliance body ( 1 ), and the drawer ( 2 ) can be relative to the installation cavity. 3 . chamber sliding; The door switch assembly (3) comprises a first iron core (31) arranged on the bottom wall of the installation chamber, a first electromagnetic coil (32) wound on the first iron core (31); a second iron core (33) on the drawer (2) and opposite to the first iron core (31), and a second electromagnetic coil (34) wound on the second iron core (33); The first electromagnetic coil (32) and the second electromagnetic coil (34) are both connected to the controller. 3 . The door opening and closing control method of a drawer type household appliance according to claim 2 , wherein the drawer ( 2 ) is provided with a limit switch ( 41 ) connected to the controller, and the installation cavity The inner wall is provided with a first limit post (42) that can make the limit switch (41) close when the drawer (2) is completely closed, and can make the limit switch (41) close when the drawer (2) is completely opened A second limit post (43) with the limit switch (41) closed. 4. The door-opening control method of a drawer-type household appliance according to claim 2, wherein the first electromagnetic coil (32) and the second electromagnetic coil (34) are respectively connected with a power-on and power-off control device. A first switch and a second switch, both of which are connected to the controller. 5. The door opening and closing control method of a drawer type household appliance according to claim 2, wherein the controller acquires the door closing signal and the door opening signal in real time and controls the first electromagnetic coil and the first electromagnetic coil when the door closing signal or the door opening signal is obtained. The two electromagnetic coils are energized to make the drawer move. 6 . The door opening and closing control method for a drawer-type household appliance according to claim 1 , wherein during the operation of the household appliance, the drawer is in a closed state and the first electromagnetic coil and the second electromagnetic coil are both energized to lock the drawer. 7 . state. 7. The door opening and closing control method for a drawer-type household appliance according to claim 1, characterized in that, during the deceleration movement of the drawer, when the limit switch is closed, the current speed of the drawer is less than or equal to the second preset speed.

Images