KR100224442B1 - Controlling method of lamp for microwave oven - Google Patents

Abstract

The present invention relates to a lamp driving control method for a microwave oven, comprising: a cooking chamber (1) for heating food, a lamp (20) installed on the ceiling of the cooking chamber (1) to illuminate the interior of the cooking chamber (1), Door opening and closing detection unit 50 for detecting the opening and closing of the door installed in the front of the cooking chamber 1, the lamp driver 60 for driving the lamp 20, the door opening and closing detection unit 50 As a result, when the door is opened, a lamp lighting signal is output to the lamp driving unit 60 to turn on the lamp 20, and when the door is closed, the lamp driving unit 60 turns off the lamp when the door is closed. In the lamp driving control method of a microwave oven having a control unit 30 for extinguishing the lamp 20 by outputting a signal, the lamp 20 is turned on unnecessarily because the door is left inadvertently closed or incompletely closed by a user's carelessness. To determine whether the status is Ramp-on time comparison step of comparing the lighting time of the lamp 20 with the reference time of approximately 5 minutes to take out or insert the food in the cooking chamber 1 inside the cooking chamber 1 (S16) ); And when the lighting time of the lamp 20 reaches the reference time of approximately 5 minutes in the lamp lighting time comparison step (S16) to prevent waste of power consumption due to unnecessary lighting of the lamp 20, The control unit 30 is achieved by the lamp off step (S18) for outputting a lamp off signal to the lamp driving unit 60 to forcibly turn off the lamp (20).

Description

Lamp driving control method of microwave oven

The present invention relates to a lamp driving control method of a microwave oven, and in particular, in a microwave oven that turns off and turns off a lamp according to the opening / closing state of the door, the lamp is unnecessarily left open or the door is incompletely closed due to inadvertent closing of the lamp. The present invention relates to a lamp driving control method for a microwave oven, by which it is forcibly turned off while preventing a waste of power consumption.

In general, a microwave oven is a cooker using the principle of heating the food by its own molecular motion by oscillating a high frequency of approximately 2,450MHz, that is, the principle of dielectric heating. In such a microwave oven, a high frequency of approximately 2,450 MHz is oscillated in the magnetron to be introduced into the cooking chamber, and the molecules constituting the food severely collide with each other by the induced high frequency to heat the food.

1 is a longitudinal sectional view showing the configuration of a conventional microwave oven. Referring to this, the inner case 2 and the outer case 3 forming the cooking chamber 1 are coupled to each other at a predetermined interval. In the space between the outer case 3 and the inner case 2 on the side of the cooking chamber 1, the electric compartment 4 is formed by partitioning the cooking chamber 1. An electric heater 5 is installed at the ceiling of the cooking chamber 1 and a tray 6 is installed at the bottom. The electronics compartment 4 is provided with a magnetron 7 for oscillating high frequency and a high voltage transformer 8 for applying a high voltage to the magnetron 7. In the partition 9 partitioning the cooking chamber 1 and the electrical equipment compartment 4, a suction through-hole 10 for guiding the inflow of the outside air into the cooking chamber 1 is formed. A plurality of the suction through-holes 10 are arranged at predetermined intervals.

On the other hand, the partition wall (9) is provided with a lamp cover (11) to cover the suction through hole 10, the lamp cover 11, the air introduced into the electrical equipment compartment 4 through the suction through hole (10) Guide to enter (1). Lamp 12 is installed inside the lamp cover 11, the lamp 12 is to project the light to the suction through-hole 10 to illuminate the inside of the cooking chamber (1).

The conventional lamp 12 is turned on when opening the door (not shown) installed in the front of the cooking chamber 1 or start cooking, the microcomputer is controlled to turn off when the door is closed or cooking is completed, the lamp 12 is In a state in which the cooking chamber 1 illuminates the inside, the user takes out or puts food in the cooking chamber 1.

However, in the conventional microwave oven, when the door is left inadvertently left open by the user or when the door is incompletely closed, since the lamp 12 is constantly unnecessarily lit, there is a problem in that power consumption is wasted.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to turn off the unnecessary lamp by forcibly turning off the lamp when the door is left inadvertently left inadvertently or the door is incompletely closed. The present invention provides a lamp driving control method of a microwave oven to prevent waste of power consumption.

1 is a longitudinal cross-sectional view showing the configuration of a conventional microwave oven,

Figure 2 is a longitudinal cross-sectional view showing the configuration of a microwave oven applied to the present invention,

3 is a control block diagram for a microwave oven applied to the present invention;

4 is a flowchart showing a lamp driving control method of a microwave oven according to the present invention.

* Explanation of symbols for main parts of the drawings

1: cooking room 4: electrical equipment room

5: electric heater 6: tray

7: magnetron 8: high pressure transformer

20: lamp 21: installation worker

22: diffused glass 23: filament

30 control unit 40 key operation unit

50: door opening and closing detection unit 60: lamp driving unit

70: magnetron drive unit 80: display unit

An object of the present invention as described above is a cooking chamber for heating food, a lamp installed on the ceiling of the cooking chamber to illuminate the interior of the cooking chamber, the door opening and closing detection unit for detecting the opening and closing of the door installed in the front of the cooking chamber and And a lamp driver for driving the lamp and a lamp opening signal output to the lamp driver when the door is opened and the lamp opening part is turned on, and the lamp driver is turned on when the door is closed. In the lamp driving control method of a microwave oven having a control unit for extinguishing the lamp by outputting a low lamp off signal, it is possible to determine whether the door is unlit or incompletely closed due to user's inadvertent lighting. So that the control unit turns off the cooking time of the lamp and the inside of the cooking chamber. The lamp lighting time comparing step for comparing the reference time of about 5 minutes, or when the lighting time of the lamp reaches the reference time of approximately 5 minutes in the lamp lighting time comparing step. In order to prevent waste of power consumption due to unnecessary lighting of the lamp, the control unit outputs a lamp power off signal to the lamp driving unit, thereby achieving the lamp by extinguishing the lamp.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a longitudinal cross-sectional view showing the configuration of a microwave oven applied to the present invention, Figure 3 is a control block diagram for a microwave oven applied to the present invention, and the components of the same function as the conventional will be described with the same reference numerals. .

As shown in FIG. 2 and FIG. 3, the cooking chamber 1 is opened forward and is formed by the ceiling 1a, the bottom 1b, and both side surfaces 1c. In the bottom 1b of the cooking chamber 1, a tray 6 for placing food is rotatably installed and rotatable, and is partitioned from the cooking chamber 1 to provide an electric equipment compartment 4. The electric field seal chamber 4 is provided with a magnetron 7 for oscillating high frequency and a high voltage transformer 8 for applying a high voltage to the magnetron 7. In addition, a cooling fan (not shown) for cooling the magnetron 7 and the high pressure transformer 8 is installed in the electrical equipment room 4.

On the other hand, the lamp 20 is provided as a lighting means in the ceiling (1a) of the cooking chamber (1). To this end, an installation hole 21 is formed in the ceiling 1a, and a diffusion glass 22 is installed in the installation hole 21 to be convex toward the cooking chamber 1. The lamp 20 is installed outside the cooking chamber 1 to project light through the diffusion glass 22 to illuminate the cooking chamber 1. The lamp cover 24 for supporting the lamp 20 is installed on the outside of the installation hole 21. At this time, the filament 23 of the lamp 20 is located outside the cooking chamber 1 because the high frequency induced into the cooking chamber 1 may leak to the outside in the roll of the filament 23. .

As shown in Figure 3, the microwave oven applied to the present invention is a key operation unit 40 for receiving the type of cooking, cooking time and start of cooking from the user, and the door opening and closing detection unit 50 for detecting whether the door is opened or closed. And the lamp in response to the detection result of the door opening / closing detecting unit 50 and controlling the overall operation for performing the sound according to the type and the cooking time of the sound input through the key control unit 40. The control unit 30 for controlling the operation of turning on or off 20, the lamp driver 60 for turning on and off the driving of the lamp 20 in accordance with the control signal of the control unit 30 and the control unit 30 According to the control signal of the magnetron driving unit 70 and the control unit 30 that receives the control signal to control the driving of the magnetron 7 and displays the type of cooking, various information on the cooking state and the operation state of the microwave oven, etc. With display part 80 The.

The control unit 30 outputs a lamp lighting signal to the lamp driving unit 60 to illuminate the cooking chamber 1 when detecting the opening of the door through the donor opening / closing detecting unit 50 to open the lamp 20. When the door is closed through the door opening / closing detecting unit 60, the lamp 20 is turned off by outputting a lamp off signal to the lamp driving unit 60.

In addition, the controller 30 is in a state in which the lamp 20 is turned on unnecessarily, i.e., the lamp 20 is turned on unnecessarily due to negligence of the user in the state in which the lamp 20 is turned on, or the door is incompletely closed. When the time reaches approximately 5 minutes, the lamp 20 lit by the door opening is forcibly turned off. Therefore, the lamp 20 is turned off by the control unit 30 even if the lamp 20 is continuously turned on because the user inadvertently closes the door in the process of putting the food into the cooking chamber 1 or removing the food. The waste of power consumption can be prevented.

The lamp driving control method of the microwave oven according to the present invention having the configuration as described above is as follows.

4 is a flowchart showing a lamp driving control method of a microwave oven according to the present invention. First, when power is applied to the microwave oven by turning on the power switch in step S10, driving power is applied to the door opening detecting unit 50 and the key manipulation unit 40. Accordingly, the door opening detecting unit 50 winds the opening / closing state of the door installed in the front of the cooking chamber 1, that is, the opening and closing of the door, and outputs the detection signal to the controller 30, and the key input unit 40. Receives a cooking type and cooking time from the user and outputs to the control unit (30). Accordingly, the control unit 30 can perform cooking according to the cooking type and the cooking time received through the key operation unit 40.

Subsequently, in step S12, the controller 30 determines an open / closed state of the door according to a detection signal input through the door open / close detection unit 30.

When the user opens the door to insert or remove food into the cooking chamber 1 as a result of the pin disconnection in step S12, the control unit 30 sends a lamp signal to the lamp driving unit 60 in step S14. The lamp 20 is turned on by outputting the lamp.

After the lamp 20 is turned on by opening the door as described above, in step S16, the control unit 30 turns on the lighting time of the lamp 20 lit by the door opening and the food in the cooking chamber 1. Compare the reference time for removal or insertion. Here, the reference time is about 5 minutes and is stored in advance in the control unit 30, which is necessary for the user to open the door and take out food from the inside of the cooking chamber 1 or put the food into the cooking chamber 1. Considering the time it takes, since it takes about 5 minutes without elapsed, it rarely occurs.

When the lighting time of the lamp 20 lit by the door opening in step S16 does not reach 5 minutes, the reference time, the user normally removes or inserts food from the cooking chamber 1 and closes the door. Return to step S12 to determine the recognition. If the door is closed in this step (S12) it is to perform normal cooking.

On the other hand, as a result of comparing the lighting time of the lamp 20 lit by the door opening in step (S16) and the reference time 5 minutes, the user put the food in or out of the cooking chamber 1 and left the door open or Alternatively, when the door is incompletely closed and its lighting time reaches 5 minutes as the reference time, the lamp 20 is judged to be turned on unnecessarily and the process proceeds to step S18.

In operation S18, the controller 30 outputs a lamp off signal to the lamp driver 60 to force the lamp 20 to prevent waste of power consumption due to unnecessary lighting of the lamp 20. Turned off.

On the other hand, when the door is closed as a result of the detection of step S12 in step S20 the control unit 30 outputs a lamp off signal to the lamp driving unit 60 to turn off the lamp 20. Subsequently, in step S22, the control unit 30 outputs a driving signal to the magnetron driving unit 70 to perform cooking at the type and cooking time of the cooking input from the user through the key manipulation unit 40. Accordingly, the magnetron driving unit 70 drives the magnetron to induce high frequency into the cooking chamber 1 to perform cooking.

After performing step S18 and step S22, the process returns to the start step and the lamp 20 is turned on and off according to the opening / closing state of the door as described above. Let's go.

As described above, when the lamp is turned on by detecting the door opening through the door opening / closing detection unit, and the lamp lighting time reaches about 5 minutes, which is a standard time for removing or inserting food from the cooking chamber, Since the lit lamp is forcibly turned off, there is an effect of preventing the waste of power consumption due to the lamp being unnecessarily lit while the door is left inadvertently left unattended or the door is incompletely closed.

Claims (1)

Whether to open or close the cooking chamber 1 for heating food, the lamp 20 installed on the ceiling of the cooking chamber 1, and the door installed in front of the cooking chamber 1 to illuminate the interior of the cooking chamber 1. Detection of the door opening and closing detection unit 50, the lamp driving unit 60 driving the lamp 20, and the door opening and closing detection unit 50 as a result of the detection of the lamp opening signal to the lamp driving unit 60 when the door is opened. The controller 20 turns on the lamp 20 by turning off the lamp 20 by outputting a lamp off signal to the lamp driver 60 when the door is closed, and detecting the door opening / closing detection unit 50 as a result. 30. In the lamp driving control method of the microwave oven having the control panel 30, the control unit 30 may determine whether the lamp 20 is unnecessarily lit due to the user's inadvertent opening or incomplete closing of the door. Is a lighting time of the lamp 20 and the cooking chamber (1) Ramp-on time comparison step (S16) for comparing the reference time of approximately 5 minutes to take out the food or put the food inside, and in the lamp-lighting time comparison step (S16) of the lamp 20 When the lighting time reaches a reference time of approximately 5 minutes, the control unit 30 sends a lamp off signal to the lamp driving unit 60 to prevent waste of power consumption due to unnecessary lighting of the lamp 20. The lamp driving control method of a microwave oven, characterized in that it comprises a lamp to turn off the lamp (20) to forcibly turn off the lamp (20).