KR100792799B1 - Microwave oven with device for installing thermistor - Google Patents

Abstract

A microwave oven with a thermistor installing device is provided to protect a breakdown of the microwave oven due to a spark on the fixed thermistor in a cooking room by installing the thermistor in the cooking room only when a heater is in operation, using a damper able to rotate. A microwave oven with a thermistor installing device comprises a cooking room(110) for cooking food, an electronic component room(115) installed at a side of the cooking room, containing a multi-hole part(120) at a side to flow air inhaled from an outside to the cooking room, a magnetron(130) installed in the electronic component room, a heater(133) installed in the cooking room, a damper(150) opening the multi-hole part when the magnetron operates and closing the multi-hole part when the heater operates, a thermistor(140) installed at a side of the damper to measure temperature of the cooking room, a control part controlling operation of the magnetron, the heater, and the damper, a transfer part(160) connected to the thermistor to transmit an output signal of the thermistor to the control part, and an air guide plate(135) installed in an outer side of the damper from the multi-hole part in the electronic component room to guide the outside air into the multi-hole part.

Description

Microwave oven with thermometer mount {MICROWAVE OVEN WITH DEVICE FOR INSTALLING THERMISTOR}

1 is a perspective view showing a microwave oven according to the prior art.

Figure 2 is a front view showing a microwave oven according to the prior art.

Figure 3 is a plan view showing a state when the magnetron operation as an embodiment of a microwave oven having a thermometer mounting apparatus according to the present invention.

Figure 4 is a plan view showing a state when the heater is operating as an embodiment of a microwave oven having a thermometer mounting apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

110: cooking chamber 112: tray

113: motor 115: battlefield

117: panel portion 120: porous portion

125: cooling fan 130: magnetron

133: heater 135: air guide plate

137: groove 140: thermometer

145: protrusion cap 150: damper

155: rotation axis 160: transmission unit

162: steel wire 163: stranded wire

165: connector

The present invention relates to a microwave oven, and more particularly to a microwave oven having a thermometer mounting apparatus.

In general, a microwave oven is a cooking apparatus that cooks food using microwaves in a short time, and microwaves generated from a magnetron to which high voltage is applied are irradiated to food in the cooking chamber through a waveguide, By vibrating the water molecules contained therein to generate thermal energy, the food is heated and cooked therein.

Such microwave ovens can be used to cook a variety of foods in a variety of ways by appropriately adjusting the microwave output and the time the microwaves are irradiated to the food, and can also be used to heat foods already cooked or to melt frozen food. have.

Moreover, since there is a heater inside the cooking chamber of a microwave oven, a cooking chamber can be heated and cooked by a heater.

1 is a perspective view showing a microwave oven according to the prior art, Figure 2 is a front view showing a microwave oven according to the prior art.

1 and 2, the microwave basically includes a cooking chamber 10 inside the inner case 10a and an electric cabinet 20 between the outer case 20a and the inner case 10a.

In the cooking chamber 10, a tray 15 on which food is placed, a motor (not shown) for rotating the tray 15 at a lower portion of the tray 15, and a food is heated at the side or the upper side of the cooking chamber 10. The heater 18 is installed, the magnetron 40 for generating a microwave, and a high-voltage transformer (not shown) for applying a high voltage to the magnetron 40 is installed in the electric room 20.

Looking at the process of cooking food by the microwave oven, the food is placed on the tray 15 of the cooking chamber 10, and then the operation panel 25 is operated to set cooking conditions and operate the microwave oven.

Thereafter, microwaves generated in the magnetron 40 are generated by the high voltage applied from the high voltage transformer, and the microwaves are guided into the cooking chamber 10 through the waveguide 42.

This microwave is irradiated to the food placed in the tray 15, the tray 15 is rotated by a motor in the lower portion to deliver it evenly to the food.

In addition, by heating the heater 18 installed on the side or the upper portion of the cooking chamber 10, the temperature of the inside of the cooking chamber 10 may be raised to heat the food.

In this process, water vapor generated in the cooking chamber 10 enters the battlefield chamber 20 through the porous part 30 installed at the interface between the cooking chamber 10 and the battlefield chamber 20, and is located at the rear of the battlefield chamber 20. It is discharged to the outside through the cooling fan 35 is installed.

The thermometer 50 is generally fixed to the upper side of the inside of the cooking chamber 10, and the heater cooking and the convection cooking are performed by calculating the ratio of the value read by the thermometer 50.

However, when cooking by the magnetron 40, the microwave is not completely dispersed in the cooking chamber 10, and the temperature of the food on the tray 15 to which the microwave is directly irradiated and the temperature of the edge portion of the cooking chamber 10 It is meaningless to measure the temperature because of the large deviation.

In addition, when the thermometer 50 protrudes in the cooking chamber 10, and microwaves are applied, sparks may occur and cause microwave oven failure, and also cause malfunction of the thermometer 50.

Therefore, there is a need for improvement.

The present invention has been created by the necessity as described above, the microwave oven having a thermometer mounting device when the thermometer is fixed inside the cooking chamber is installed by a spark generated by the microwave to cause failure of the microwave oven or thermometer element It is an object of the present invention to provide a microwave oven which can prevent a defect from occurring.

A microwave oven having a thermometer mounting apparatus according to the present invention comprises: a cooking chamber in which food is cooked; An electrical equipment chamber formed at one side of the cooking chamber and having a porous portion at one surface thereof so that air introduced from the outside flows into the cooking chamber; A magnetron installed inside the electric room; A heater installed inside the cooking chamber; A damper that opens the porous portion when the magnetron is operated and closes the porous portion when the heater is operated; A thermometer installed on one surface of the damper to measure the temperature of the cooking chamber; A controller for controlling operations of the magnetron, the heater, and the damper; And a transmission unit connected to the thermometer to transfer an output value of the thermometer to the controller.

It is preferable to further include an air guide plate formed on the outside of the damper on the basis of the porous portion in the electric chamber to guide the air introduced from the outside into the porous portion.

The transmission unit is connected to one side of the thermometer, the steel wire having a predetermined length to move through the groove formed in the air guide plate; A connector connected to the steel wire and spanning a groove formed in the air guide plate; And one side is more preferably connected to the connector, the other side further comprises a twisted pair connected to the control unit.

It is more preferable that the predetermined length of the steel wire corresponds to the operating range of the damper in the porous portion and the air guide plate.

It is preferable to further include a protruding cap on the interior wall of the cooking chamber in which the porous portion is formed and the electrical equipment chamber to protect the external shape of the thermometer.

The protruding cap is more preferably manufactured using a stainless material so as to accurately measure the temperature of the cooking chamber by the thermometer.

Microwave oven having a thermometer mounting apparatus according to the present invention having the configuration as described above is installed by adding a thermometer to the damper to rotate in accordance with the present invention, by installing the thermometer in the cooking chamber only when the heater operates in accordance with the operation of the damper It is possible to prevent the cause of the malfunction of the microwave oven, such as the spark generated by the operation of the microwave on the thermometer and the failure of the thermometer element.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a microwave oven having a thermometer mounting apparatus according to the present invention. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

The cooking method of the multi-function microwave oven includes a method of cooking food by radiating microwaves in a cooking chamber using a magnetron, and a method of cooking food by a heater by installing a heater at an upper or lower portion of the cooking chamber.

Figure 3 is a plan view showing a state when the magnetron operation as an embodiment of a microwave oven having a thermometer mounting apparatus according to the present invention, Figure 4 is a heater as an embodiment of the microwave oven having a thermometer mounting apparatus according to the present invention This is a plan view showing the state of operation.

3 and 4, the microwave oven having a thermometer mounting apparatus includes a cooking chamber 110, an electric chamber 115, a cooling fan 125, a porous part 120, an air guide plate 135, and a damper 150. ), The thermometer 140, the protruding cap 145 and the like.

The cooking chamber 110 is formed inside the inner case, and a tray 112 is installed at the bottom thereof, and a motor 113 is installed at the bottom thereof.

When the microwave oven is operated, the tray 112 is rotated by the motor 113, and the tray 112 is operated by operating the magnetron 130 of the heater 133 or the electric chamber 115 of the upper side and the side of the cooking chamber 110. ) Cook the food placed on top evenly.

The electrical equipment room 115 is formed on the surface between the outer case and the inner case, the accessory is responsible for the operation function, such as the magnetron 130 and the panel unit 117 is installed.

The cooling fan 125 is disposed at the rear of the battlefield chamber 115, and serves to suck external air into the battlefield chamber 115 and discharges hot air from the cooking chamber 110 after cooking to the outside via the battlefield chamber 115. It plays a role.

The porous part 120 is installed at the interface between the electric battle chamber 115 and the cooking chamber 110, through which air in the electric battle chamber 115 moves to the cooking chamber 110 and cools the inside of the cooking chamber 110.

In addition, after cooking, the hot air in the cooking chamber 110 is discharged to the outside through the electrical equipment chamber 115.

The air guide plate 135 is installed at the front of the porous part 120 toward the battlefield chamber 115 so that air in the battlefield chamber 115 can smoothly flow into the cooking chamber 110.

The damper 150 is installed on the battlefield chamber 115 side, and rotates using a boundary surface between the cooking chamber 110 and the battlefield chamber 115 as the rotation shaft 155. The damper 150 may be cooked by maximizing thermal efficiency by closing the porous part 120 when cooking the heater 133 so that the heat inside the cooking chamber 110 does not escape to the outside, and when cooking the magnetron 130, The porous part 120 is opened by touching the guide plate 135.

A driving unit (not shown) is installed on the upper side of the rotating shaft 155 at the boundary between the cooking chamber 110 and the electric compartment 115 where the damper 150 is installed to allow the damper 150 to rotate. This is operated by the user operating a button of the panel unit 117 provided in the front of the battle room 115.

The thermometer 140 is installed on one side of the damper 150, and protrudes from the surface of the damper 150, which is not installed, to be combined with the protruding cap 145 installed on the interface between the cooking chamber 110 and the electric chamber 115. Protrude from the cooking chamber 110 surface.

The protruding cap 145 protects the thermometer 140 from the microwaves of the magnetron 130, and the thermometer 140 is made of a stainless material having good heat transfer to effectively measure the temperature inside the cooking chamber 110.

In addition, the protruding cap 145 protrudes from the surface of the cooking chamber 110 to effectively measure the temperature inside the cooking chamber 110, and is vulnerable to microwaves emitted from the magnetron 130. It is preferable to install on the side adjacent to the waveguide (not shown) which is a rectangular area.

The transmission unit 160 is connected to one side of the thermometer 140 and transmits the value measured by the thermometer 140 to the controller (not shown), and displays it on the panel unit 117 or through the heater 133 or the like. Make it adjustable.

The transmission unit 160 is composed of a steel wire 162, a connector 165, a stranded wire 163, and is connected to the controller through the groove 137 of the air guide plate 135.

The transmission unit 160 is a steel wire 162, the wire portion 162, the connector 165 and the stranded wire 163 to enter the air guide plate 135 in order to prevent tangling with each other by the rotation of the damper 150 is a steel wire 162 Install it.

The steel wire 162 is a portion connected to the end of the thermometer 140, the moving distance while the portion where the thermometer 140 of the damper 150 is installed to rotate from the air guide plate 135 to the porous portion 120 Install to have length.

The connector 165 is a portion connecting the steel wire 162 and the stranded wire 163. When the damper 150 rotates to contact the porous part 120, the connector 165 is caught by the groove 137 of the air guide plate 135. It is designed not to move anymore.

The stranded wire 163 is a portion connecting the connector 165 and the control unit.

The controller controls the operations of the cooling fan 125, the magnetron 130, the heater 133, and the damper 150, and also displays the temperature value measured by the thermometer 140 on the panel unit 117. .

The panel unit 117 displays whether the user operates the cooling fan 125, whether the magnetron 130 and the heater 133 operate, whether the damper 150 rotates, and the measured temperature value in the thermometer 140. The above items may be selectively adjusted by touching a button.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the microwave oven having a thermometer mounting apparatus according to an embodiment of the present invention.

Referring to FIG. 4, when the user cooks the heater 133, the heater 133 at the rear of the cooking chamber 110 is operated, and after a predetermined time, the inside of the cooking chamber 110 has a uniform temperature.

When the porous part 120 is opened in this state, heat inside the cooking chamber 110 is discharged to the outside, which is disadvantageous in terms of energy efficiency, so that the damper 150 is rotated to contact the porous part 120.

The thermometer 140 installed at one side of the damper 150 enters into the protruding cap 145 installed at the boundary between the cooking chamber 110 and the electric battle chamber 115, and the protruding cap 145 has a good heat transfer. Produced using the bar, the thermometer 140 may measure the temperature inside the cooking chamber 110 in the cooking chamber 110 side.

At this time, the steel wire 162 of the transmission unit 160 is connected between the damper 150 and the air guide plate 135, the connector 165 is caught in the groove portion 137 of the air guide plate 135, stranded wire 163 transmits the value measured by the thermometer 140 to the controller (not shown).

Referring to FIG. 3, in contrast to the above, when cooking the magnetron 130, it is not significant to measure the temperature inside the cooking chamber 110 due to a large temperature deviation inside the cooking chamber 110 by microwaves.

In addition, when a microwave generated by the magnetron 130 is applied to the thermometer 140, the microwave 140 may cause a failure of the microwave oven, such as sparks, and the like. It is necessary to remove from).

The damper 150 is rotated clockwise with respect to the rotation shaft 155 by the signal of the control unit and the rotation of the driving unit to reach the air guide plate 135, the thermometer 140 is located in the electric chamber 115. .

Therefore, it is possible to prevent the spark that may occur due to the microwave actuating the thermometer 140.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. In addition, the thermometer mounting apparatus of the microwave oven and a control method thereof have been described as an example, but this is merely exemplary, and the thermometer mounting apparatus of the present invention may be used in a thermometer mounting apparatus other than the thermometer mounting apparatus used in the microwave oven. . Therefore, the true technical protection scope of the present invention will be defined by the claims below.

As described above, the microwave oven having a thermometer mounting apparatus according to the present invention, unlike the conventional invention, by installing a thermometer in the rotatable damper to install the thermometer in the cooking chamber only when the heater is operated in accordance with the operation of the damper. By doing so, it is possible to prevent the cause of the failure of the microwave oven such as sparking caused by the operation of the microwave in the thermometer and the cause of the failure of the thermometer element.

Claims (6)

A cooking chamber in which food is cooked; An electrical equipment chamber formed at one side of the cooking chamber and having a porous portion at one surface thereof so that air introduced from the outside flows into the cooking chamber; A magnetron installed inside the electric room; A heater installed inside the cooking chamber; A damper that opens the porous portion when the magnetron is operated and closes the porous portion when the heater is operated; A thermometer installed on one surface of the damper to measure the temperature of the cooking chamber; A controller for controlling operations of the magnetron, the heater, and the damper; A transmission unit connected to the thermometer and transferring an output value of the thermometer to the controller; And And an air guide plate formed at an outer side of the damper on the basis of the porous portion in the electric compartment to guide air introduced from the outside into the porous portion. delete The method of claim 1, wherein the delivery unit, A steel wire connected to one side of the thermometer and having a predetermined length to move through the groove formed in the air guide plate; A connector connected to the steel wire and spanning a groove formed in the air guide plate; And One side is connected to the connector, the other side is a microwave oven having a thermometer mounting device, characterized in that it comprises a stranded wire connected to the control unit. The method of claim 3, And a predetermined length of the steel wire corresponds to an operating range of the damper in the porous portion and the air guide plate. The method of claim 1, Microwave oven having a thermometer mounting apparatus further comprises a protruding cap to the outer wall of the cooking chamber and the electrical equipment chamber in which the porous part is formed to protect the external shape of the thermometer. The method of claim 5, The protruding cap is a microwave oven having a thermometer mounting device, characterized in that made using a stainless material so as to accurately measure the temperature of the cooking chamber by the thermometer.

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