KR20190001876A - Knock on door and cooking appliance therewith - Google Patents

Abstract

The present invention relates to a knock on a door and a cooking appliance therewith. According to the present invention, the knock on the door includes: a door opening and shutting one open side of a cooking space and including an outside glass, an inside glass which faces the outside glass at intervals and is arranged toward the cooking space, and a door frame combined fixedly between the outside glass and the inside glass and having a space inside; a knock on a sensor sensing a knocking input applied through an outer glass; and a control part working a lighting part which lights the inside of the cooking space in order to check the inside of the cooking space from the outside of the door when sensing the knocking input from the knock on the sensor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a knock-

The present invention relates to a knock on door of a door and a cooking device having the knock door. More particularly, the present invention relates to a knock on door which is capable of detecting a knock signal transmitted through a door and illuminating the inside of the cooking chamber, And a cooking appliance having the door.

A cooking device is one of household appliances for cooking food, and is installed in a kitchen space to cook food according to a user's intention. Such cooking devices can be classified into various types according to the heat source or type used and the type of fuel.

Cooking equipment can be classified into open type and closed type cooking equipment depending on the type of space where food is placed. The closed cooking devices include an oven and a microwave oven, and open cooking devices include a cooktop and a hop.

A closed type cooking device is a cooking device that shields a space where food is placed and cooks food by heating a shielded space. The closed type cooking apparatus is provided with a cooking chamber, which is a space that is shielded when the food is placed and food is to be cooked. Such a cooking chamber becomes a space where food is substantially cooked, and is opened and closed by a door installed in front of the cooking chamber. A heat source is provided in the inside or outside space of the cooking chamber to heat the cooking chamber. As such a heat source, a gas burner or an electric heater or the like may be used.

Meanwhile, in recent years, technology has been developed to improve the performance of cooking devices, and technologies for providing various effects to users using cooking devices have been developed.

For example, in order to check the inside of the cooking chamber, it is required to open the door. It is required to develop a technique that can confirm the inside of the cooking chamber through a simple operation of the user (for example, knocking) without opening the door.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a knock on door for a cooking machine capable of confirming the inside of a cooking chamber with only a simple knock operation of a user without opening the door.

In addition, the present invention provides a knock-on door for a cooker that can visually check a cooking chamber from the outside of a door by sensing a knock signal transmitted through a door to illuminate the inside of the cooking chamber.

It is another object of the present invention to provide a cooking appliance having such a knock-on door.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

The knock-on door according to an embodiment of the present invention includes an outer glass, an inner glass disposed facing the outer glass with a gap therebetween, and an inner glass fixedly coupled between the outer glass and the inner glass, A door that opens and closes an open side of the cooking chamber; A knock-on sensor embedded between the outer glass and the inner glass, the knock-on sensor sensing a knock input applied through the outer glass; And a control unit for operating an illumination unit for illuminating the inside of the cooking chamber so that the inside of the cooking chamber can be identified outside the door when a knock input is detected in the knock-on sensor.

On the other hand, the knock-on sensor may be provided on the display combining member, and the knock-on sensor may be disposed on the display combining member, It can be installed through the receiving groove.

Further, the display may be located at an inner center of the display combining member, and the receiving groove may be located at one side of the display.

Also, the knock-on sensor may be installed at an outer portion of the cooking cavity formed along the edge portion of the door, away from the open surface of the cooking chamber.

Also, the knock-on sensor includes a microphone unit, and the microphone unit protrudes toward the outer glass and is arranged to face the outer glass, and the knock input through the outer glass can be received by a sound wave.

Also, the knock-on sensor includes a module micom, and the module micom senses a sound wave received through the microphone unit, determines that a predetermined knock input is applied, and transmits the determination result to the controller.

The knock-on sensor may further include: a filter unit for removing noise from a signal received by the microphone unit; And an amplifier for amplifying a signal output from the filter unit and outputting a signal to the module microcomputer.

The door sensor may further include a proximity sensor provided on the door to sense whether the user approaches the door, wherein the knock-on sensor is activated to detect the knock input after the user's approach is detected from the proximity sensor .

According to another aspect of the present invention, there is provided a cooking apparatus comprising: a main body having a cooking chamber with one side opened; An illumination unit for illuminating the inside of the cooking chamber; An inner glass which opens and closes the opened one face of the cooking chamber and is arranged toward the cooking chamber facing the outer glass with a space therebetween, and an inner glass fixedly coupled between the outer glass and the inner glass, A door including a door frame; A knock-on sensor embedded between the outer glass and the inner glass, the knock-on sensor sensing a knock input applied through the outer glass; And a control unit for operating an illumination unit for illuminating the inside of the cooking chamber so that the inside of the cooking chamber can be identified outside the door when a knock input is detected in the knock-on sensor.

On the other hand, the knock-on sensor may be provided on the display combining member, and the knock-on sensor may be disposed on the display combining member, It can be installed through the receiving groove.

Also, the knock-on sensor may be installed at an outer portion of the cooking cavity formed along the edge portion of the door, away from the open surface of the cooking chamber.

According to the present invention, in the closed type cooking apparatus such as the oven, there is an advantage that the inside of the cooking chamber can be seen only by the simple knocking operation of the user without opening the door.

According to the present invention, in a closed-type cooking apparatus such as an oven, a knocking signal transmitted through a door is sensed, and an illuminating unit illuminating the inside of the cooking chamber is turned on so that a cooking chamber shielded by a door outside the door can be visually confirmed There are advantages.

 The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is a perspective view schematically showing a cooking apparatus according to an embodiment of the present invention.
FIG. 2 is a side cross-sectional view illustrating an internal configuration of a cooking apparatus according to an embodiment of the present invention.
3 is a cross-sectional side view of a knock on door in accordance with an embodiment of the present invention.
4 is a block diagram of a control configuration applied to a knock on door according to an embodiment of the present invention.
FIG. 5 is an exploded perspective view of a door of a cooking device according to an embodiment of the present invention. Referring to FIG.
6 is an enlarged cross-sectional view of the region VI of FIG.
7 is an enlarged perspective view of only the display combining member in the detailed structure of the door shown in Fig.
FIG. 8 is a view schematically showing a front surface shape of a cooking appliance provided with a knock-on door according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification. Further, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, the terms first, second, A, B, (a), (b), and the like can be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening " or that each component may be " connected, " " coupled, " or " connected " through other components.

The present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. As shown in FIG.

The term " cooker " as used herein refers to a device that is installed in a kitchen space and cooks food according to a user's intention, as one of household appliances for cooking food. Cooking appliances can be classified into various categories depending on the heat source or type used and the type of fuel. According to the type of cooking food, it can be classified into open type and closed type cooking type depending on the type of space where food is placed. The closed cooking devices include an oven and a microwave oven, and open cooking devices include a cooktop and a hop.

The knock-on door and the cooking device having the knock-on door according to an embodiment of the present invention will be described with reference to a closed type cooking device, for example, an oven.

A cooking device and its internal construction according to an embodiment of the present invention will be briefly described.

FIG. 1 is a perspective view schematically showing a cooking device according to an embodiment of the present invention, and FIG. 2 is a side sectional view showing an internal configuration of the cooking device.

Referring to FIGS. 1 and 2, a cooking apparatus 1 according to an embodiment of the present invention is formed with an outer appearance by a main body 10.

The main body 10 may have a rectangular parallelepiped shape, but is not limited thereto and may have various other shapes.

In addition, since the main body 10 must have a predetermined strength required to protect a large number of parts installed therein, the main body 10 can be made of various materials compatible therewith.

Further, although not shown separately, the upper portion of the main body 10 may further include an apparatus such as a cooktop for cooking food as an open cooking device, but the present invention is not limited thereto.

The main body 10 may be provided with an oven part 30.

A cooking chamber 31 (see FIG. 2) is located inside the oven portion 30, and this cooking chamber 31 (see FIG. 2) is used as a space into which a container containing food ingredients is put and cooked.

For example, the cooking chamber 31 is formed of a box-shaped space in which the other surface is sealed except for one surface (e.g., a front surface).

The opened one face of the cooking chamber 31 is used as a container for putting a container containing food ingredients or for taking out cooked foods.

Meanwhile, the cooking chamber 31 is heated with respect to the food material introduced into the closed internal space in a state where the internal space is sealed, and the food is cooked for the set time.

To this end, the oven unit 30 may further include various heating means for heating the cooking chamber 31.

For example, as shown in Fig. 2, the upper heater 36, the lower heater 37, and the convection portion 38 may be included in the heating means for heating the cooking chamber 31.

The upper heater 36 is disposed above the cooking chamber 31 to heat the cooking chamber 31 from above.

Further, the lower heater 37 is disposed below the cooking chamber 31 to heat the cooking chamber 31 from below.

The convection part 38 heats the inside of the cooking chamber 31 by using the high temperature air heated to the set temperature from the rear of the cooking chamber 31.

2, the upper heater 36, the lower heater 37, and the convection unit 38 are all shown, but may include various embodiments including at least one of them.

On the other hand, a door 40 for opening and closing the front face of the cooking chamber 31, that is, the front face is provided.

The door 40 may be configured to pivot in a predetermined direction to open or seal the internal space of the cooking chamber 31.

For example, when the upper end of the door 40 is rotated counterclockwise about the lower end of the door 40, the cooking chamber 30 is opened. On the other hand, The cooking chamber 30 is shielded by turning clockwise around the center.

Next, a knock-on door included in the cooking apparatus according to an embodiment of the present invention will be described.

FIG. 3 is a view schematically showing a knock-on door in a cooking apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the door 40 may be installed in front of the main body 10 to open and close one open side (i.e., front side) of the cooking chamber 31.

On the inside of the door 40, a knock-on sensor 100 may be provided. The knock-on sensor 100 refers to a device for sensing a knock input applied through the exterior of the door 40.

4 is a block diagram of a control configuration applied to a knock on door according to an embodiment of the present invention.

Referring to FIG. 4, the knock-on sensor 100 is disposed inside the door 40 (see FIG. 3) to sense a knock input externally applied to the door 40.

In detail, the knock-on sensor 100 is preferably a sensor for sensing a sound wave propagated by the medium. It is possible to detect the user's knock input by detecting that the sound wave to be detected is a specific pattern.

The knock-on sensor 100 means that the distance between the sound wave generating point and the sound wave sensing point can be separated as long as the medium is continuous. In other words, considering the total area of the door 40 (see FIG. 8) of the cooking appliance, it means that the distance between the sound wave generating point and the sound wave sensing point can be maximized as long as continuity of the medium is maintained in the door.

Here, the sound wave generating point may be a point at which a user applies a knock input from the outside of the door, and the sound wave sensing point may be a point at which the knock on sensor 100, and more specifically, .

The knock-on sensor 100 includes a microphone unit 110, a filter unit 120, an amplifier 130, and a module microcomputer 140.

The microphone unit 110 can receive a knock input applied to the outside of the door 40 by sound waves.

The signal received by the microphone unit 110 may include unnecessary noise other than the sound wave due to the knock input, and the filter unit 120 removes such noise.

The signal output after the noise is removed from the filter unit 120 is amplified through the amplifier 130. The amplified signal is output to the module microcomputer 140.

The module microcomputer 140 may be configured separately from the control unit 200. The module microcomputer 140 may sense a sound wave received through the microphone unit 110 and judge whether a predetermined knock input is applied. That is, it can be determined whether or not it is the set knock input signal. The result of the determination by the module microcomputer 140 may be transmitted to the controller 200.

The control unit 200 controls the illumination unit (not shown) to check the inside of the cooking chamber 31 (see FIG. 3) from the outside of the door 40 (see FIG. 3) in response to a determination result transmitted through the module microcomputer 140 300 can be operated.

The lighting unit 300 is provided outside the cooking chamber 31 (see FIG. 3) to provide illumination toward the inside of the cooking chamber 31 (see FIG. 3) or to be provided inside the cooking chamber 31 Structure, and is not limited to any one form. The light emitting unit 300 may use various light emitting devices and may be constructed in various forms without limitation as long as it is a known light emitting device.

Herein, the controller 200 may be referred to as a 'main microcomputer' that controls the overall operation of the cooking appliance by distinguishing it from the module microcomputer 140. That is, the operation of various cooking apparatuses such as operating the cooking chamber 31 (see FIG. 3) at a set temperature or turning on / off the illumination unit 300 and visually outputting various information through the display 46d Can be controlled.

FIG. 5 is an exploded perspective view of a door of a cooking device according to an embodiment of the present invention. Referring to FIG.

5, the door 40 includes an outer glass 41, an inner glass 42, a door frame 45, and a display engaging member 46.

The outer glass 41 is a glass member disposed on the outermost side of the door 40 to provide an exterior surface of the door 40.

The external glass 41 is a member to which a knock input is applied by a user and is disposed at the outermost side of the door 40 so as to act as a medium in which a sound wave propagates when a knock is input, I will. Accordingly, it is preferable that the microphone unit 110 is directly connected to the external glass 41 or through another medium.

The inner glass 42 is a member made of a glass material which is opposite to the outer glass 41, that is, the inner surface of the door 40 and is disposed toward the cooking chamber 31 (see FIG. 3).

The inner glass 42 is arranged to face the outer glass 41 with a predetermined gap therebetween. A door frame 45 is coupled between the outer glass 41 and the inner glass 42.

The door frame 45 is a rectangular frame member interposed between the outer glass 41 and the inner glass 42 and fixedly coupled thereto.

For example, the door frame 45 includes an upper frame 45a disposed at an upper portion of the door 40, a lower frame 45d disposed at a lower portion of the door 40, And both ends frames 45b and 45c.

The display engaging member 46 is a plate-like member which is coupled to the inner upper portion of the door frame 45 (i.e., the lower side of the upper frame 45a).

Specifically, a display 46d may be provided at an inner center of the display engaging member 46 to output various operations of the cooking apparatus as time information.

One side of the display 46d may be provided with a receiving recess 46a which is recessed in a predetermined size and shape. The knock-on sensor 100 and the microphone unit 110 may be accommodated in the receiving groove 46a.

The door 40 may further include a proximity sensor 400. The proximity sensor 400 is configured to detect whether or not the user approaches the door 40. At least one proximity sensor 400 may be provided. If it is detected by the proximity sensor 400 that the user is approaching the door 40, the knock-on sensor 100 may be activated to receive a knock input from the user.

For example, as shown in Fig. 8, the display engaging member 46 may be disposed above the open side of the cooking chamber 31, and more specifically, the cooking chamber 31. As shown in Fig.

The knock-on sensor 100 and the microphone unit 100 received through the receiving groove 46a in the display engaging member 46 are separated from the cooking chamber 31 by the high temperature Lt; / RTI >

On the other hand, the knock-on sensor 100 and the microphone unit 110 are disposed at the edge of the door 40 spaced apart from the display coupling member 46, for example, the cooking chamber 31 (see FIG. 8) (E.g., including the areas A1, A2, and A3) provided along the outer circumferential surface thereof. When such an installation form is provided, a supporting member such as a separate supporter may be further provided, and the supporting member may be provided in various forms.

The proximity sensor 400 may also be installed at the lower left of the display coupling member 46. The proximity sensor 400 may be a sensor that detects a user within a predetermined distance from the door 40, that is, a movement of a human body, or a sensor that can measure a distance to an object in front of the proximity sensor 400. In other words, the proximity sensor can be applied to various types of sensors if it can recognize that there is a person in front of the cooking device.

Accordingly, the position of the proximity sensor 400 is not limited to the position shown in the drawing, and the positional change is also possible if the sensing region of the sensor is a region representative of the front of the cooking appliance. According to the cooking apparatus of the embodiment, the display 46d is provided at the front center portion of the display engaging member 46, and a knock-on sensor 100 is provided on one side of the display combining member 46. The proximity sensor 400 includes a knock- To the one end of the display engaging member 46. As shown in Fig.

Referring to FIG. 5 again, the inner glass 42 is formed in a relatively small size as compared with the outer glass 41, and the lower end is supported by a separate holder 44, unlike the outer glass 41.

A cover 43 is provided on the upper portion of the inner glass 42. The cover 43 fixes and supports the rear surface of the display engaging member 46. [

 A plurality of reflective glasses 48 are interposed between the outer glass 41 and the inner glass 42 on the lower side of the display coupling member 46 and further include various components such as a plurality of hinge brackets 49 .

6 is an enlarged cross-sectional view of the region VI of FIG.

Referring to FIG. 6, an outer glass 41 is provided on the outer side of the door 40, and a cover 43 and an inner glass 42 are provided on the opposite side. A plurality of reflection glasses 48 are interposed between the outer glass 41 and the inner glass.

The display engaging member 46 is provided at the upper inside of the door frame 45.

Further, the display engaging member 46 has the receiving groove 46a in the direction toward the outer glass 41. [

The receiving groove 46a is provided with a predetermined receiving space 46b for receiving the knock-on sensor 100 and the microphone unit 110. [ At this time, the microphone unit 110 may be disposed in a structure that is in contact with or directly or indirectly connected to the external glass 41 so that it can receive sound waves through the external glass 41 when the user knocks it.

A cover 43 is coupled to the inside of the display engaging member 46 and an inner glass 42 is disposed below the cover 43. A plurality of reflection glasses 48 may be interposed between the outer glass 41 and the inner glass 42.

7 is an enlarged view of only the display engaging member.

7, the display engaging member 46 is a plate-shaped member having a predetermined thickness and having left and right lengths corresponding to the door 40 (see Fig. 5). A display window 46d for visually outputting the set information is provided inside the display combining member 46. [

The display engaging member 46 is provided with a receiving groove 46a for receiving the knock-on sensor 100 and the microphone unit 110. The receiving groove 46a is formed on one side of the display 46d, Or on the right side).

The proximity sensor 400 is further provided on the display coupling member 46. The proximity sensor 400 can sense whether the user approaches the door 40 or not. If the proximity sensor 400 detects that the user approaches the door 40, the knock-on sensor 100 may be activated to receive a knock input from the user.

FIG. 8 is a view schematically showing a front surface shape of a cooking appliance provided with a knock-on door according to an embodiment of the present invention.

Referring to Fig. 8, the display engaging member 46 is disposed upwardly from the cooking chamber 31. Fig. The knock-on sensor 100 and the microphone unit 110 are received and coupled through a receiving groove 46a formed on one side of the display 46d.

In this way, since the knock-on sensor 100 and the microphone unit 110 are arranged in the display engaging member 46 disposed apart from the cooking chamber 31 heated at a high temperature, they are less affected by high temperature heat, Can be improved.

On the other hand, the knock-on sensor 100 and the microphone unit 110 may be fixed to various fixed positions through the edge regions of the door 40, that is, the outer portions A1, A2, and A3, Structure. ≪ / RTI >

Specifically, in the case of the outer glass 41 (see FIG. 6) constituting the door 40, since the flat glass rather than the curved surface is used, there is no positional limitation with respect to the sensing ability of the knock-on sensor 100, You can select the installation location if you are in a position where you can receive less heat.

As described above, according to the structure and operation of the present invention, in the closed type cooking apparatus such as the oven, the inside of the cooking chamber can be seen only by the simple knocking operation of the user without opening the door.

Especially, in a closed type cooking apparatus such as an oven, there is an advantageous technical effect that a knocking signal transmitted through a door is sensed and an illuminating unit illuminating the inside of the cooking chamber is turned on so that the cooking chamber shielded by the door outside the door can be visually confirmed .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments. It is obvious that a transformation can be made. Although the embodiments of the present invention have been described in detail above, the effects of the present invention are not explicitly described and described, but it is needless to say that the effects that can be predicted by the configurations should also be recognized.

1: Cooking equipment
10: Body
30: oven part
31: Cooking room
36: upper heater
37: Lower heater
38: Convection part
40: Door
41: Outer glass
42: Interior glass
43: cover
44: Holder
45: Door frame
45a: upper frame
45b, 45c: Both ends frame
45d: lower frame
46: display coupling member
46a: receiving groove
46d: Display
48: Reflective Glass
100: Knock-on sensor
110: microphone section
120:
130: Amplifier
140: Module microcomputer
200:
300:
400: proximity sensor

Claims (12)

And a door frame fixedly coupled between the outer glass and the inner glass and having an inner space, wherein the outer glass and the outer glass are separated from each other, A door that opens and closes one side;
A knock-on sensor embedded between the outer glass and the inner glass, the knock-on sensor sensing a knock input applied through the outer glass; And
A control unit for operating an illumination unit for illuminating the inside of the cooking chamber so that the inside of the cooking chamber can be recognized outside the door when a knock input is detected by the knock-on sensor;
A knock-on door.
The method according to claim 1,
A display coupling member having a display is coupled to an upper space of the door frame,
Wherein the display combining member is disposed upwardly spaced apart from an open side of the cooking chamber,
The knock-on sensor is installed through a receiving groove provided in the display combining member
Knock on door.
3. The method of claim 2,
Wherein the display comprises:
A display coupling member located at an inner center of the display coupling member,
Wherein,
And a display unit
Knock on door.
The method according to claim 1,
The knock-
And is installed in an outer portion of a cooking cavity formed along an edge portion of the door beyond an open side of the cooking chamber
Knock on door.
The method according to claim 1,
The knock-on sensor includes a microphone portion,
The microphone unit includes:
And a knock input through the external glass is received by a sound wave
Knock on door.
6. The method of claim 5,
The knock-on sensor includes a module microcomputer,
The module micom senses a sound wave received through the microphone unit, determines that a predetermined knock input is applied, and transmits a determination result to the controller
Knock on door.
The method according to claim 6,
The knock-
A filter unit for removing noise from a signal received by the microphone unit; And
An amplifier for amplifying a signal output from the filter unit and outputting a signal to the module microcomputer;
Further comprising a knock-on door.
The method according to claim 1,
Further comprising a proximity sensor provided on the door to sense whether the user is approaching the door,
The knock-on sensor is activated to sense the knock input after the user's access from the proximity sensor is sensed
Knock on door.
A main body having a cooking cavity whose one surface is opened;
An illumination unit for illuminating the inside of the cooking chamber;
An inner glass which opens and closes the opened one face of the cooking chamber and is arranged toward the cooking chamber facing the outer glass with a space therebetween, and an inner glass fixedly coupled between the outer glass and the inner glass, A door including a door frame;
A knock-on sensor embedded between the outer glass and the inner glass, the knock-on sensor sensing a knock input applied through the outer glass; And
A control unit for operating an illumination unit for illuminating the inside of the cooking chamber so that the inside of the cooking chamber can be recognized outside the door when a knock input is detected by the knock-on sensor;
.
10. The method of claim 9,
A display coupling member having a display is coupled to an upper space of the door frame,
Wherein the display combining member is disposed upwardly spaced apart from an open side of the cooking chamber,
The knock-on sensor is installed through a receiving groove provided in the display combining member
Cooking equipment.
10. The method of claim 9,
The knock-
And is installed in an outer portion of a cooking cavity formed along an edge portion of the door beyond an open side of the cooking chamber
Cooking equipment.
The method according to claim 1,
Further comprising a proximity sensor provided on the door to sense whether the user is approaching the door,
The knock-on sensor is activated to sense the knock input after the user's access from the proximity sensor is sensed
Cooking equipment.

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