KR100680987B1 - Microwave oven swithing control system and the method - Google Patents

Abstract

A multifunctional microwave switching control system and method, the microwave oven comprising: first switching means connected to operate a magnetron in an electronic part of a microwave oven in a predetermined operation cycle, and a second for turning on and off a vent motor of the microwave oven And a microprocessor for performing a control command to turn on and off the switching means, the first switching means and the second switching means, respectively. When the second switching means is connected in an on state, the first switching means is delayed for a predetermined time, characterized in that the microprocessor controls two or more switching means at the same time PCB (Printed Circuit Board) It is to prevent the noise generated from.

Microwave OTR, Switching

Description

MICROWAVE OVEN SWITHING CONTROL SYSTEM AND THE METHOD}

1 is a perspective view showing an installation state of a microwave oven according to an embodiment of the present invention;

2 is a block diagram showing the internal structure of the microwave oven shown in FIG. 1;

3 is a block diagram showing the internal structure of a microwave oven according to another embodiment of the present invention;

FIG. 4 is a flow chart generally showing how the first switching means of the microwave oven of FIG. 1 is switched;

FIG. 5 is a flowchart illustrating that the magnetron relay is switched when the hood mode is executed among the subcyclically switching modes of FIG. 4; and

FIG. 6 is a flowchart illustrating that a magnetron relay is switched when a write mode is executed among the subcyclically switching modes of FIG. 4.

<Description of Symbols for Main Parts of Drawings>

100: microwave oven 110: display means

120: vent pen 122: vent motor

124: second switching means 130: keypad

140: microprocessor 150: magnetron

152: first switching means 154: rectifier circuit

156: high voltage transformer 158: microwave

160: turntable 162: tray motor

170: third switching means 172: light

200: kitchen furniture 300: gas oven range

The present invention relates to a switching control system and method for a multi-functional microwave oven, and more particularly to a switching control system and method for a multi-functional microwave oven for preventing noise generated while another switching means is operated during the execution of the periodically operating switching means. It is about.

In general, a microwave oven is a kitchen appliance that heats the inside and the outside of the microwave by irradiating the microwaves with microwaves at the same time, and greatly shortens the cooking time according to the high thermal efficiency, and reduces the nutritional value during cooking, thawing and warming of the food. It is also widely used because of the advantages of cooking directly while the food is stored in a container.

In addition, in recent years, the hood function that allows ventilation in the kitchen and the lighting function that adjusts the lighting of the cooking space are merged into the microwave oven to minimize the installation space of the microwave oven and to cook food more conveniently and efficiently. A hooded microwave oven (OTR) has been disclosed.

This conventional hood-only microwave oven is located in the external housing to control the ventilation or the brightness of the cooking space when the magnetron relay for switching the magnetron according to the cooking cycle set by the user during operation is in operation. When switching to change the on-off period with a button there was a problem that two or more relays work together to generate noise from the PCB.

Accordingly, an object of the present invention is to solve the above problems, and provides a switching control system and method for a multifunctional microwave oven to prevent noise generated while another switching means is operating during execution of a periodically operating switching means. There is.

Technical means of the present invention for achieving the above object is, in the multi-function microwave switching control system, the first switching means connected to operate the magnetron in the electronic device of the microwave oven in a predetermined operating cycle, the vent of the microwave oven Second switching means for turning the motor on and off, and a microprocessor for performing a control command to turn on and off the first switching means and the second switching means, respectively, wherein the microprocessor is a predetermined operation of the first switching means. When the second switching means is connected to the on state when connected from the off state to the on state when operating in a cycle, characterized in that for delaying the connection of the first switching means for a predetermined time.

The first switching means is a magnetron relay for switching the magnetron for irradiating high frequency to the cooking chamber inside the microwave oven.

The second switching means is connected to the microprocessor, characterized in that the vent relay for switching the power supply of the exhaust device.

The predetermined time is checked 0.1 to 1 second before the first switching means is turned on, and the second switching means is operated, and 0.1 to 1 second after the operation control signal is received by the second switching means. The first switching means is turned on.

The switching control system of the multi-functional microwave oven further comprises third switching means for turning on and off the light lamp of the microwave oven, wherein the microprocessor is configured to be in an off state when the first switching means is operated at a predetermined operating period. When the third switching means is connected in the on state when connected in the on state, the connection of the first switching means is delayed for a predetermined time.

The third switching means is connected to the microprocessor, characterized in that the light relay for switching the power of the light lamp to brighten the cooking space.

A switching control method of a multifunctional microwave oven comprising a first switching means for switching a magnetron at a predetermined operating cycle and a second switching means for executing a hood mode, wherein the user controls the keypad of the external housing in a mode for cooking food. A first step of setting an operation period and an intensity of the first switching means suitable for food using the second step; a second step of switching the first switching means by applying a control signal set to the keypad to a microprocessor; A third step of applying the drive signal of the second switching means to the microprocessor in the on state of the means, wherein the microprocessor delays the control signal applied to the first switching means for a predetermined time and the second switching means A fourth step of transmitting a drive signal to the mobile station; After the lapse characterized by comprising a fifth step in which the first control signal applied to the remainder of the operating cycle set by the first switching means material.

The third step further includes the step of applying a driving signal of the third switching means for turning the light on and off in the on state of the first switching means to the microprocessor, the control signal applied to the first switching means Is delayed for a predetermined time and a predetermined time elapses after the driving signal is transmitted to the third switching means, and the remaining control signal of the operation period set as the first switching means is reapplied.

Hereinafter, a preferred embodiment of the switching control system of the microwave oven 100 according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the installation state of the multi-function microwave oven 100 in the cooking space, Figure 2 is a block diagram showing the interrelation of the internal components of FIG.

The multi-functional microwave oven 100 operates a gas oven range 300 for warming food (not shown) between kitchen furnitures 200 used for storing and the like in a cooking space. There is a hood for discharging to the outside, the light 172 for adjusting the brightness in the kitchen may be installed together.

As shown in FIG. 2, the multifunction microwave oven 100 includes a heating source, a first switching means 152, a second switching means 124, a hood part, a keypad 130, and a microprocessor 140. .

The general heating source of the microwave oven 100 is a dielectric heating method, and microwave 158, which is a high frequency band, is used to cook by heat generated while rotating water molecules in a food (not shown). The magnetron 150 is disposed to generate a microwave 158 that becomes.

In addition, the magnetron 150 generates a high voltage by the high voltage transformer 156, and receives the switched power through the rectifier circuit 154 to implement the high voltage as a smooth DC power.

The magnetron 150 irradiates the microwave 158 into the cooking chamber of the microwave oven 100 to generate heat to the food (not shown), and according to the operating cycle of the microwave 158, the food (not shown). ), The cooking state is different.

Therefore, the operation period of the magnetron 150 is determined according to the first switching means 152 for supplying power to the magnetron 150, and by operating the keypad 130 located in the external housing of the microwave oven 100. By setting the interval and time of the periodic on and off operation of the first switching means 152, the cooking state of the food (not shown) desired by the user is made.

The first switching means 152, it is preferable to use a device capable of continuous switching, such as a magnetic relay device because of the characteristics that the application of the power supply must be changed periodically. In the above description, such a device is referred to as a magnetron relay.

When the magnetron relay is being switched at the operation cycle set by the keypad 130, when the second switching means 124 is operated, a switching signal is preferentially transmitted to the second switching means 124 with a time difference between the respective switching operations. do.

The second switching means 124 is connected to the microprocessor 140 is made of a vent relay for switching the power of the exhaust device, which is generated when cooking food (not shown) in the gas oven range 300 When the vent relay is operated to discharge the smell and the smoke, the microprocessor 140 temporarily applies the control command to the magnetron relay which is being executed at a constant operation cycle, and the remaining operation cycle of the magnetron relay is executed after the vent relay is first executed. Configured to execute.

The microprocessor 140 receives the control signal input to the keypad 130 and transmits an on-off signal that is switched at a predetermined operating cycle to the first switching means 152 and the first switching means 152 is turned on. When the second switching means 124 is connected to the on state when connected to the state, the switching signal applied to the first switching means 152 is delayed for a predetermined time.

When the predetermined time elapses, the microprocessor 140 operates the second switching means 124 while the cooking mode input and set by the keypad 130 is switched and executed by the first switching means 152. The first switching means 152 for executing the remaining process of the cooking mode to be operated afterwards from the time when it is temporarily suspended.

In addition to such a configuration, when the display means 170 for notifying the execution state and the microwave 158 generated from the magnetron 150 go straight and are reflected from the surrounding metal surface, the traveling wave and the reflected wave are combined to form a strong and weak electric field. There is a place, which further includes a tray motor 162 to block the heating car to rotate the turntable 160 to allow electromagnetic waves to evenly reach the food (not shown).

In addition to the hood for multi-functional microwave oven 100 is a number of advanced functions are added, the components not mentioned in the present invention is further included in the present invention that the microwave oven switching control system of the present embodiment is applied It is self-evident in.

3 is a block diagram showing the internal structure of a microwave oven according to another embodiment of the present invention.

As shown in FIG. 3, a third switching means 170 is added to the configurations shown in FIG. 2.

The third switching means 170 is further included in the first switching means 170 and the second switching means 170, the fourth switching means (not shown) according to the function and performance of the multi-function microwave oven 100 ) Or a fifth switching means (not shown) may additionally be added.

Here, the third switching means 170 is an embodiment of the light relay 172 element.

The microprocessor 140 may include the first switching means 152 when the third switching means 170 is connected to the on state when the first switching means 152 is connected from the off state to the on state when the first switching means 152 operates in a predetermined operation period. Delay the switching signal is applied for a predetermined time.

In addition, when the second switching means 124 and the third switching means 170 are operated at the same time, the microprocessor 140 similarly performs the second switching means 124 when the first switching means 152 is connected in an on state. ) And the third switching means 170 preferentially operate for a predetermined time.

The predetermined time means that whether the second switching means 124 or the third switching means 170 is operated one second before the first switching means 152 is switched on, and the second switching means is determined. After one second has elapsed after the operation control signal is transmitted to the third or third switching means 170, the first switching means 152 is operated again to set the remaining period of the set execution mode to be executed.

In addition, the one second set to the predetermined time is set to a minute time that does not affect the cooking of the food located in the cooking chamber even if the operation of the first switching means 152 is temporarily held, It is obvious that the present invention is not limited to this, and it is preferable to set the finer time.

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

4 is a flowchart showing a method for controlling the first switching means 152 of the multifunctional microwave oven 100.

As shown in FIG. 4, the user selects a desired execution mode using the keypad 130 in the external housing of the microwave oven 100 (S3).

The user selects a mode for cooking food (not shown) in the cooking chamber of the microwave oven 100, and an operation period and intensity of the first switching means 152 to obtain a desired cooking state of the food (not shown). (S5)

The control signal containing information on the operation period and the intensity of the first switching means 152 set by the keypad 130 is applied to the microprocessor 140 so that the first switching means 152 is switched to the magnetron 150. (S7)

Here, the second switching means 124 to operate only the on-off aperiodic by operating the keypad 130 of the external housing while the first switching means 152 is in the on state or during the switching to the on state. The driving signal is applied to the microprocessor 140. (S9)

When the execution control signal is delivered to the microprocessor 140 and the operation time of the first switching means 152 that is switched at a predetermined operation cycle is detected, the cooking state of the food (not shown) is not affected. The control signal of the operation period to the first switching means 152 is delayed for a minute time which is not enough, and a driving signal is applied to the second switching means 124. (S11 to S13)

After the set minute time has elapsed, the operation cycle of the non-executed magnetron relay 152 after the identified time of operation is restarted.

In addition, the switching means for aperiodic on-off operation is not limited to the second switching means 124, it may be configured by adding as the third switching means 170, the fourth switching means (not shown) and the like. Do.

According to an embodiment of the present invention, the first switching means 152 is a magnetron relay, the second switching means 124 is a vent relay for driving the vent motor 122 for ventilating the air of the kitchen, The three switching means 170 is symmetrical to the light relay for adjusting the brightness of the kitchen.

In addition, even when the second switching means 124 and the third switching means 170 operate simultaneously, the first switching means 152 does not transmit a control signal of an operation period for a predetermined time and preferentially the first switching means. The driving signal is transmitted to the second switching means 124 and the third switching means 170.

Fig. 5 is a flowchart showing a method for controlling the magnetron relay when executing the hood mode for ventilation.

The food in the cooking chamber (not shown) is executed by the user in a set operation cycle (S101 and S103).

The switching of the magnetron relay is operated by the control command of the microprocessor 140 by the operation cycle set by the keypad 130, and the microwave 158 generated by the magnetron 150 is operated in the cooking chamber according to the operation cycle of the switching. (S105 and S107)

During this process, the user receives the control signal by the hood control button of the external housing to the microprocessor 140 and senses it, and the execution of the operation cycle of the magnetron relay is suspended for a minute time from the detected time. In addition, the microprocessor 140 transmits a driving signal to the vent relay within the temporary holding time, and the vent motor 122 is operated. (S109 and S113)

The driving signal is transmitted and the remaining operation cycle of the magnetron relay 152 that has not been executed is executed again (S115).

FIG. 5 is a flowchart illustrating a method for controlling the magnetron relay when executing the light 172 control mode.

The user selects a mode for cooking food (not shown) in the cooking chamber to set an operation period of the magnetron 150 suitable for the food (not shown) (S201 and S203).

By this setting, the microprocessor 140 issues a control command to switch the magnetron relay, and the microwave 158 generated by operating the magnetron 150 is irradiated into the cooking chamber according to the switching operation (S205 and S207). )

In addition, the control signal by the control button of the light housing 172 of the external housing is transmitted to the microprocessor 140, and the execution of the operation cycle of the magnetron relay 152 is suspended for a minute time from the transmission point (S209 and S211).

Within the delayed time, the microprocessor 140 transmits a control signal for preferentially operating to the write relay, and after the transmission, the remaining operation cycle of the non-executed magnetron relay is executed again (S213 and S215).

While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be understood individually from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

Accordingly, in the present invention, when another switching means is operated during the periodic operation of the switching means, a switching variation time difference is provided between the switching means, thereby preventing noise generated while temporarily switching without time difference. .

Claims (8)

In the multifunctional microwave switching control system, First switching means connected to operate the magnetron in the electronic device of the microwave oven in a predetermined operation cycle; Second switching means for turning on and off the vent motor of the microwave oven; And a microprocessor for performing a control command to turn on and off the first switching means and the second switching means, respectively. When the second switching means is connected to the on state when the microprocessor is connected from the off state to the on state in the operation of the predetermined operating cycle of the first switching means, the connection of the first switching means is disconnected for a predetermined time. Switching control system of a multifunctional microwave, characterized in that the delay. The method according to claim 1, wherein the first switching means, And a magnetron relay for switching the magnetron for irradiating high frequency to the cooking chamber inside the microwave oven. The method according to claim 1, wherein the second switching means, And a vent relay for switching the power supply of the exhaust device in connection with the microprocessor. The method according to claim 1, wherein the predetermined time, 0.1 to 1 second before the first switching means is turned on, and confirms whether the second switching means is operated. An operation control signal is transmitted to the second switching means, and the first switching means is turned on after 0.1 to 1 second. A switching control system for a multifunctional microwave oven characterized by being in a state. The switching control system of the multifunctional microwave oven according to claim 1, And third switching means for turning on and off the light lamp of the microwave oven, wherein the microprocessor is configured to switch the third switching means when the first switching means is connected from an off state to an on state in operation in a predetermined operation period. And the connection of the first switching means is delayed for a predetermined time when connected to the on state. The method according to claim 5, wherein the third switching means, And a light relay connected to the microprocessor for switching a power of a light lamp to brighten a cooking space. In the switching control method of the multi-functional microwave oven comprising a first switching means for switching the magnetron in a predetermined operating cycle and a second switching means for executing the hood mode, A first step of setting, by the user in the mode for cooking food, an operation period and intensity of the first switching means suitable for food by using a keypad of an external housing; A second step of switching the first switching means by applying a control signal set by the keypad to a microprocessor; A third step of applying a driving signal of the second switching means to the microprocessor in an on state of the first switching means; The microprocessor may further include: a fourth step of delaying a control signal applied to the first switching means for a predetermined time and transmitting a driving signal to the second switching means; And And a fifth step of reapplying the remaining control signal of the operating period set by the first switching means after a predetermined time has elapsed after the driving signal is transmitted. The method of claim 7, wherein the third step, The driving signal of the third switching means for turning the light on and off in the on state of the first switching means further comprises the step of applying to the microprocessor, the control signal applied to the first switching means for a predetermined time And a predetermined time elapses after the drive signal is transmitted to the third switching means due to a delay, and the remaining control signal of the operation period set as the first switching means is reapplied.

Images