KR20110070470A - Microwave oven having hood - Google Patents

Abstract

PURPOSE: A microwave oven having a hood is provided to improve safety by simultaneously sensing the abnormal state of a cooking chamber and a convection device. CONSTITUTION: A microwave oven having a hood comprises a main body, an upper plate(15), a fan(50), a cooking chamber, a heating source, a convection device, and a temperature sensing unit(90). The upper plate divides the inner space of the main body into upper and lower spaces. The fan moves the air in the inner space of the main body. The cooking chamber is located at the lower space. The heating source heats food inside the cooking chamber. The convection device moves the air in the inner space of the cooking chamber. The temperature sensing unit senses the temperature of air passing through an exhaust port, a suction port, and a convection port.

Description

Microwave oven having hood {Microwave oven having hood}

The present invention relates to a microwave oven, and more particularly, to a hood combined microwave oven with improved safety.

Microwave ovens are one of cooking appliances that heat and cook food by heat emitted from a high frequency and / or heater called microwave bra. The microwave oven is provided with a magnetron that oscillates a high frequency by a supplied power source and irradiates the inside space of a cooking chamber, which is a space where food is cooked.

The microwave oven cooks food by shielding the cooking chamber providing a cooking space of the food to be cooked and then heating the food by radiating high frequency generated from the magnetron to the inner space of the shielded cooking chamber.

In addition, in recent years, various heating sources are installed for fast and efficient food cooking. Such a heating source is provided with a magnetron for oscillating and radiating high frequency into the inner space of the cooking chamber, a heater for heating the shielded cooking chamber by dissipating heat by electricity supplied, and installing various heating sources to provide food more quickly. Cooking a lot, has the advantage of being able to cook a variety of food.

As described above, various heating sources are installed to heat the food to be cooked, thereby reducing the cooking time of the food and cooking various foods. However, a plurality of electrical components for the operation of the various heating sources and heating sources are installed. The cooling air must be accompanied by a flow of cooling air.

Even when the cooling air is accompanied by the flow of the food by heating the food at a high temperature by the operation of various heating sources, the food is overheated, or the surrounding space of the heating source may be overheated to a high temperature, such a fire Sometimes problems arise.

In other words, it is possible to shorten the cooking time of the food by being able to heat the food at a high temperature by installing a variety of heating sources, but it is also important to ensure the safety accordingly.

And, the hood function to discharge or purify the air containing the exhaust gas generated in the process of cooking food in the other cooking apparatus installed below the microwave to the indoor space, that is, the kitchen space where the user is located. Microwave ovens are commonly referred to as hooded microwave ovens or over the range type microwave ovens. The hood combined microwave further includes an air flow path for a hood function including a flow of cooling air.

The hood-use microwave oven further includes an air flow path for a hood function, and has an air flow path different from that of a general microwave oven, and an exhaust flow path of exhaust gas generated when food is cooked by a different air flow path than a general microwave oven. The exhaust passage is provided with various parts for cooking food.

In the present invention, it is intended to propose a hood-use microwave oven provided with a temperature sensing unit that can simultaneously recognize the abnormal state of the cooking chamber and the convection device.

Microwave oven according to the present invention, the main body forming the appearance; An upper plate dividing an inner space of the main body into an upper space and a lower space; A blowing fan for flowing air in the main body inner space; A cooking chamber located in the lower space to provide a cooking space for food; A convection device for flowing air in the inner space of the cooking chamber; And a sum of distances between the air moving passages between the cooking chamber and the convection device and the moving passages at one point between the air moving passages between the cooking chamber and the upper space is the smallest. Recognizing temperature sensing unit; Included.

In addition, the hood combined microwave oven according to the present invention, the main body forming an appearance; An upper plate dividing an inner space of the main body into an upper space and a lower space; A blowing fan positioned in an inner space of the main body to suck and exhaust air; A cooking chamber located in the lower space to provide a cooking space for food; A convection device located above the cooking chamber and having a convection exhaust port for flowing air from the inside of the cooking chamber to the outside space and a convection suction port for flowing air flowing through the exhaust port into the interior space of the cooking chamber; A gas exhaust port which is a passage through which exhaust gas generated in an inner space of the cooking chamber flows into the upper space; And a temperature sensing unit for detecting an abnormal state of the main body by being located in an inner space of a figure formed when the convection exhaust port, the convection intake port, and the gas exhaust port connect rear ends of the portions facing each other in a virtual straight line. Included.

According to the hood combined microwave oven according to the present invention as described above, the abnormal state of the cooking chamber and the convection device can be detected at the same time it is possible to expect the effect of improving safety.

In addition, by detecting the abnormal state of the cooking chamber and the convection device at the same time, it is possible to simultaneously detect the effect by the one temperature sensing unit can be expected to improve the assembly and productivity, resulting in the production of a microwave oven with a hood The effect of reducing the manufacturing cost can be expected, the production cost of the product is reduced due to the reduction of the manufacturing cost has the advantage of improving the price competitiveness of the product.

Hereinafter, with reference to the accompanying drawings, a hood and microwave oven according to the present invention having the problems and effects as described above will be described an embodiment.

However, the spirit of the present invention may not be limited to the embodiments by the embodiments described below, and those skilled in the art who understand the spirit of the present invention may easily use other embodiments falling within the scope of the same idea. It would be possible to propose, but it will also be included in the spirit of the present invention.

In addition, hereinafter, the hood combines the microwave oven according to the present invention for the convenience of description. However, the present invention is not limited thereto, and the present invention is applicable to both the hood combined microwave oven capable of smoothly moving the air inside the cooking chamber. Let's clarify in advance.

In addition, terms used in the present specification or claims are concepts selected for convenience of description and should be properly interpreted as meanings corresponding to the technical idea of the present invention in grasping the technical contents of the present invention.

 1 is a view showing a state in which the hood combined microwave oven according to an embodiment of the present invention is installed, Figure 2 is a perspective view showing a state in which the door and the control panel of the hood combined microwave oven according to the embodiment of the present invention is removed. 3 is a partial cutaway perspective view showing an upper configuration of a hood-use microwave oven according to an embodiment of the present invention, Figure 4 is a partial enlarged view showing a state in which the exhaust duct of the hood-use microwave oven according to an embodiment of the present invention is removed 5 is a partially enlarged perspective view illustrating a state in which the exhaust duct and the convection device cover of the hood-use microwave oven according to the embodiment of the present invention are removed, and FIG. 6 is a view of the hood-use microwave oven according to the embodiment of the present invention. A partially enlarged perspective view showing a state where a temperature sensing unit is installed.

First, referring to FIG. 1, the exterior of the hood-use microwave oven is formed by the main body 10. The main body 10 is in the form of a rectangular parallelepiped having an internal space. Underneath, other types of cooking appliances are installed.

The main body 10 is installed above the cooking appliance of another form. The reason is to perform a hood function of sucking exhaust gas generated from the lower side into the inner space and exhausting it to the outer space.

The door 20 is rotatably installed on the front surface of the main body 10. The front surface of the door 20 is provided with a handle 21 for holding the user.

The door 20 is formed in the form of a square plate having a predetermined thickness as a whole. The door 20 may selectively open and close a cooking chamber (30 in FIG. 2) located in the inner space of the main body 10.

The cooking chamber 30 selectively opens and closes the door 20 to provide a space where food is cooked. The inner space of the cooking chamber 30 is a space in which food is cooked.

The control panel 41 is located on the right side of the door 20. The control panel 41 is provided with an input unit such as a plurality of switches through which the user inputs an operation signal for cooking food. In addition, the control panel 41 also displays operation information of the main body 10, cooking information of food, and the like.

The control panel 41 is formed in a hexahedral shape long in the vertical direction while having a certain thickness. In the internal space of the control panel 41, a plurality of control parts are fixed and a circuit board on which various circuits are printed is placed on the surface. As the circuit board and the electric component are connected, the electric component is operated by a user's manipulation signal.

The vent grill 77 is positioned at the upper front end of the main body 10. The vent grill 77 provides a passage through which air enters and exits the inner and outer spaces of the main body 10.

Referring to FIG. 2, the electric compartment 40 is located on the right side of the cooking compartment 30. In the interior of the electric compartment 40, a plurality of electric components are installed. Inside the electric chamber 40, a magnetron 42 for generating a high frequency, a high voltage converter 43 for converting a current supplied to provide a high voltage current to the magnetron 42, and the high voltage converter ( 43, a capacitor 44 for supplying a constant voltage current is provided. In addition, the control panel 41 is substantially positioned in front of the electric compartment 40.

Meanwhile, the front panel 11 forms the front surface of the main body 10. The rear panel 12 forms the rear surface of the main body 10, and the upper panel 13 forms the upper surface and both side surfaces of the main body 10. The front panel 11, the rear panel 12, and the upper panel 13 are fixed to each other to form an outer shape of the main body 10.

The front panel 11 is made of a material having a predetermined thickness and strength, for example, a metal material as a whole. A portion of the front panel 11 corresponding to the control panel 41 and the vent grill 77 is cut away.

The upper panel 13 is formed with an outdoor discharge port 131 through which air in the internal space of the main body 10 is discharged to the outdoor space.

In addition, the upper plate 15 is provided inside the main body 10. The upper plate 15 substantially forms an upper surface of the cooking chamber 30 and the electric chamber 40. In addition, the upper plate 15 may be referred to as partitioning the cooking chamber 30 and the electric chamber 40, the exhaust space 71 and the second suction space 73 to be described later.

The upper plate 15 is provided with an exhaust port (19 of Figure 4). The exhaust port 19 serves as an outlet through which the air sucked into the cooking chamber 30 is discharged to the outside.

In addition, a side plate 17 and a lower plate 18 are provided inside the main body 10. The side plates 17 form both side surfaces of the cooking chamber 30. The left side of the drawing of the side plate 17 forms a flow path through which the combustion gas of another cooking appliance flows between the upper panel 13. In addition, the right side of the drawing of the side plate 17 substantially divides the cooking chamber 30 and the electric chamber 40.

The lower plate 18 forms bottom surfaces of the cooking chamber 30 and the electric chamber 40. The lower plate 18 is parallel to the upper plate 15. The lower end of the side plate 17 is fixed to the upper surface of the lower plate 18. In addition, the lower plate 18 and the cooking chamber 30 and the electric chamber 40 and the flow path through which the combustion gas sucked into the inside of the main body 10 by the driving of the blower fan 50 to be described later and It acts as a compartment.

A partition plate 46 is positioned at the rear end of the electric compartment 40. The partition plate 46 is positioned to be spaced apart from the front of the rear panel 12 by a predetermined distance forward. Accordingly, a flow path through which the combustion gas sucked into the main body 10 flows is formed between the partition plate 46 and the rear panel 12 by driving the blower fan 50. In addition, it may be said that the flow path between the compartment 40 and the second suction space 73 to be described later, the compartment plate 46 and the rear panel 12 is substantially partitioned by the compartment plate 46. .

On the other hand, the upper end of the front panel 11 is formed with an indoor discharge port 74, the first indoor suction port 75, the second indoor suction port 76. The indoor outlet 74, the first indoor suction port 75, and the second indoor suction port 76 are formed by cutting a portion of the upper end of the front panel 11. The indoor outlet 74 is located in the center of the upper end of the front panel (11). The first indoor suction port 75 and the second indoor suction port 76 are located at the left and right sides of the indoor discharge port 74.

The indoor outlet 74 serves as an outlet through which air is discharged from the inside of the main body 10 to the outside. In addition, the first and second indoor outlets 75 and 76 serve as inlets through which air is sucked from the outside of the main body 10.

The space formed at the rear of the indoor discharge port 74 becomes the exhaust space 71. The exhaust space 71 is a space in which air discharged from the internal space of the main body 10 to the kitchen space flows through the indoor discharge port 74.

Spaces formed at both sides of the exhaust space 71, that is, the rear of the first and second indoor suction ports 75 and 76, are the first and second suction spaces 72 and 73. The first and second suction spaces 72 and 73 are spaces through which air sucked into the internal space from the external space of the main body 10 through the first and second indoor suction ports 75 and 76. to be.

A blowing fan 50 is installed in the exhaust space 71. The blowing fan 50 may be a cross flow fan. Of course, another type of fan may be used as the blower fan 50, but a crossflow fan is most preferable in consideration of utilization of space and flow space of air.

The blowing fan 50 generates air flow for the hood function and air flow for cooling the components provided in the inner space of the main body 10. In other words, the blowing fan 50 generates a flow of air for the hood function, and a flow of air for the cooling function.

More specifically, the blowing fan 50 sucks the exhaust gas generated from the cooking appliance into the internal space of the main body 10. In addition, the blower fan 50 is sucked into the main body 10 so that the flow path inside the main body 10 (that is, the space between the lower plate 18 and the lower panel 14 and the partition plate). The space between the 46 and the rear panel 12 and the space between the side plate 17 and the upper panel 13 are sequentially flowed, and the exhaust space 71 is further flown to allow the indoor outlet 74 to flow. Or through the outdoor discharge port 131 to form a flow of air discharged to the outdoor.

In addition, the blower fan 50 is sucked through the first indoor suction port 75, cools a part while flowing the first suction space 72, and then flows the exhaust space 71 to the indoor discharge port. It is discharged through the 74, or forms a flow of air discharged through the outdoor discharge port 131.

A cooling fan 45 is installed at one side of the upper plate 15 corresponding to the upper side of the electric compartment 40. The cooling fan 45 forms an air flow for cooling the electrical components installed in the electrical equipment chamber 40.

More specifically, the cooling fan 45 is sucked through the second indoor suction port 76 and flows through the second suction space 73 to cool the electrical components inside the electric compartment 40. To form a stream of air. In addition, the cooling fan 45, after cooling the electric components inside the electric compartment 40, is delivered to the cooking compartment 30 and discharged to the outside of the cooking compartment 30 through the exhaust port 19. To form a flow.

Referring to FIG. 3, an exhaust duct 80 is installed in the exhaust space 71. The exhaust duct 80 substantially divides the exhaust space 71 into a space in which air flows and a space in which components are installed.

The exhaust duct 80 is made of a material having heat resistance, for example, a material of a heat resistant polymer compound. The exhaust duct 80 may be formed in a polyhedron shape having a longitudinal cross-section having an approximately "H" shape.

Thus, the exhaust duct 80 allows the exhaust space 71 to be divided into two spaces, that is, the space between the upper plate 15 and the exhaust duct 80 and the exhaust duct 80 and the upper panel 13. It is partitioned into the space between.

In addition, a part is installed in a space corresponding to the upper plate 15 and the exhaust duct 80, and a space corresponding to the exhaust duct 80 and the upper panel 13 is formed in a flow path through which air flows. Play a role.

In addition, an installation opening 80a is formed at the bottom of the exhaust duct 80. The installation opening 80a is formed by cutting a portion of the bottom surface of the exhaust duct 80. This installation opening (80a) is for the installation of the lamp 85 to be described later. The installation opening 80a may be selectively opened and closed by the duct cover 81.

On the other hand, the exhaust duct 80 is provided with a separating member 87. The separating member 87 divides the space between the upper plate 15 and the exhaust duct 80 into two spaces. At this time, two spaces partitioned by the separating member 87 communicate with the installation opening 80a.

On the other hand, a plurality of components are installed in the space between the upper plate 15 and the exhaust duct 80, the upper plate 15 substantially corresponding to the lower side of the exhaust duct 80. In this embodiment, the stirrer and the lamp 85 are located in the space between the upper plate 15 and the exhaust duct 80.

At this time, the stirrer device and the lamp 85 are located in the space partitioned by the separating member 87, respectively. That is, the stirrer device is located in a space on the right side of the drawing among the space partitioned by the separating member 87, and the lamp 85 is a left space on the drawing among the space partitioned by the separating member 87. Is located in. Therefore, the lamp 85 may be exposed upward of the exhaust duct 80 through the installation opening 80a.

On the other hand, the exhaust duct 80 is provided with an exhaust guide 84. The exhaust guide 84 guides the air discharged to the outside of the cooking chamber 30 through the exhaust port 19 to be discharged through the indoor exhaust port 74.

Therefore, the exhaust guide 84 may be said to partition the air flowing through the space substantially above the exhaust duct 80 and the air discharged through the exhaust port 19. The exhaust guide 84 may be integrally formed with, for example, an exhaust duct 80 corresponding to an upper side of the exhaust port 19.

On the other hand, a plurality of components are installed in the space between the upper plate 15 and the exhaust duct 80, the upper plate 15 substantially corresponding to the lower side of the exhaust duct 80. In this embodiment, the stirrer and the lamp 85 are located in the space between the upper plate 15 and the exhaust duct 80.

At this time, the stirrer device and the lamp 85 are located in the space partitioned by the separating member 87, respectively. That is, the stirrer device is located in the space on the right side of the figure partitioned by the separating member 87, and the lamp 85 is located in the left space on the figure among the space partitioned by the separating member 87. . Therefore, the lamp 85 may be exposed upward of the exhaust duct 80 through the installation opening 80a.

In more detail, the stirrer serves to diffuse the high frequency radiation irradiated into the cooking chamber 30. Such a stirrer includes a stirrer cover 83 forming a predetermined space communicating with the cooking chamber 30 and a stirrer pan installed inside the stirrer cover 83 to rotate for diffuse reflection of high frequency (not shown). And a stirrer fan motor 82 installed outside the stirrer cover 83 to provide a driving force for driving the stirrer fan. Substantially the stirrer fan motor 82 is exposed to the space between the upper plate 15 and the exhaust duct 80.

In addition, a convection device 60 is installed in the first suction space 72. The convection device 60 serves to heat and circulate the air inside the cooking chamber 30. 4 to 6, the convection device 60 includes a convection cover 62, a convection fan 63, a convection motor 61, and a convection heater 64.

The convection cover 62 is fixed to the upper surface of the upper plate 15. The convection cover 62 is formed in the shape of a polyhedron having a bottom surface opened. The convection chamber 62 shields the convection exhaust port 65 and the convection intake port 66 formed on the upper surface of the upper plate 15.

The convection suction port 65 and the convection exhaust port 66 are spaced apart from each other by a predetermined distance. The convection suction port 65 is an entrance area in which air in the cooking chamber 30 is sucked into a space between the convection cover 62 and substantially the upper plate 15 and the convection cover 62. Do it.

The convection exhaust port 66 serves as an outlet through which the air inside the convection cover 62 is discharged into the cooking chamber 30.

The convection fan 63 is located inside the convection cover 62 corresponding to the upper portion of the convection suction port 65. The convection fan 63 is sucked into the convection cover 62 from the interior of the cooking chamber 30 through the convection suction port 65, and again through the convection exhaust port 66. In the inside of the cooking chamber 30 forms a flow of air discharged into the interior.

The convection motor 61 provides a driving force for the rotation of the convection fan (63). The convection motor 61 is installed outside the convection cover 62, that is, the upper surface of the convection cover 62, and is exposed on the first suction space 72.

The convection heater 64 serves to heat the air sucked into the convection chamber 62 from the inside of the cooking chamber 30 by the driving of the convection fan 63. For example, the convection heater 64 may be installed along the edge of the convection fan 63.

On the other hand, the upper plate 15 is provided with a temperature sensing unit 90. The temperature sensing unit 90 is for detecting whether the microwave oven is abnormal, for example, whether the heating source such as the magnetron 42 or the convection device 60 is overheated.

In this embodiment, the temperature sensing unit 90 senses the temperature of the air entering and exiting through the exhaust port 19, the convection intake port 65, and the convection exhaust port 66. For example, as the temperature detector 90, a thermostat for detecting whether the sensed temperature exceeds the safe temperature may be used.

To this end, the temperature sensing unit 90 is installed to contact the upper plate 15. Therefore, the temperature sensing unit 90 is sucked into the convection cover 62 through the convection inlet 65 and the temperature of the air discharged to the outside of the cooking chamber 30 through the exhaust port 19. The temperature of the air and the temperature of the air discharged into the cooking chamber 30 through the convection exhaust 66 are sensed by being conducted through the upper plate 15.

The temperature sensing unit 90 is fixed to the upper surface of the upper plate 15 by the bracket 91. In this case, the temperature sensing unit 90 may be coupled by fitting coupling to the bracket 91.

Meanwhile, referring to FIG. 6, the temperature sensing unit 90 is positioned to satisfy all of the following conditions.

(1) A <B + C

(2) B <C + A

(3) C <A + B

Where A is the shortest distance from the temperature sensing unit 90 to the exhaust port 19, B is the shortest distance from the temperature sensing unit 90 to the convection intake port 65, and C is the temperature sensing unit. It is the shortest distance from 90 to the convection exhaust 66.

That is, the temperature sensing unit 90 may be located such that the shortest distance to any one of the exhaust port 19, the convection intake port 65, and the convection exhaust port 66 is less than the sum of the shortest distances to the rest. .

This is because if the temperature of the air entering and exiting through any one of the exhaust port 19, the convection intake 65 and the convection exhaust 66, the temperature detection unit 90 exceeds the safe temperature, the microwave oven is abnormal To judge.

For example, the temperature sensing unit 90 may be positioned to be excessively spaced apart from the convection intake port 65 as compared with the exhaust port 19 and the convection exhaust port 66. In this case, even if the temperature of the air entering and exiting through the convection suction port 65 exceeds the safety temperature, the temperature detecting unit 90 cannot detect this.

Therefore, although an error has occurred in the actual microwave oven, since the temperature detecting unit 90 does not detect this, the microwave oven may overheat or a fire may occur in the microwave oven.

Accordingly, in the present embodiment, the temperature sensing unit 90 is positioned to satisfy the inequality as described above, so that the air entering and exiting through the exhaust port 19, the convection suction port 65, and the convection exhaust port 66 is reduced. It is possible to detect whether any one of the temperatures exceeds the set safety temperature.

Hereinafter, the operation of the embodiment of the hood-use microwave oven according to the present invention will be described in more detail.

First, the magnetron 42 operates to cook food in the cooking chamber 30. On the other hand, when the magnetron 42 is operated, the cooling fan 45 is also operated to cool the electrical component including the magnetron 42. The air cooled by the electric component is delivered to the inside of the cooking chamber 30 and discharged to the outside of the cooking chamber 30 through the exhaust port 19.

Meanwhile, the convection device 60 may be operated together with the operation of the magnetron 42. Therefore, when the convection fan 63 is rotated in the convection motor 61, the inflow and outflow of air between the cooking chamber 30 and the convection cover 62 through the convection suction port 65 and the convection exhaust port 66 is reduced. Is done.

The temperature sensing unit 90 detects an abnormality of the microwave oven through the temperature of the air introduced through the intake port 19, the convection intake port 65, and the convection exhaust port 66.

However, as described above, in the present embodiment, the temperature of any one of the air entering the temperature sensing unit 90 through the exhaust port 19, the convection suction port 65 and the convection exhaust port 66 is the safety temperature. Even if it exceeds, it can be detected. Therefore, it is possible to more accurately detect the abnormality of the microwave oven by the temperature sensing unit 90.

In addition, when the microwave detector is detected by the temperature detector 90, the microcomputer (not shown) cuts off the power supplied to the microwave oven. Therefore, it is possible to prevent overheating of the microwave oven or fire generated in the microwave oven.

According to the microwave oven with a hood according to the present invention having the configuration as described above, it is possible to detect the abnormal state of the cooking chamber and the abnormal state of the convection device at the most suitable position to ensure the safety of the user safety by using the product This improved effect can be expected.

According to the hood-use microwave oven according to the present invention having such an effect, the applicability in the cooking appliance industry will be great.

 1 is an installation diagram showing a state in which the hood combined microwave oven according to an embodiment of the present invention is installed.

Figure 2 is a perspective view showing a state in which the door and the control panel of the hood microwave oven according to the embodiment of the present invention is removed.

3 is a partial cutaway perspective view showing an upper configuration of a hood-use microwave oven according to an embodiment of the present invention.

Figure 4 is a partially enlarged perspective view showing a state in which the exhaust duct of the hood combined microwave oven according to an embodiment of the present invention is removed.

5 is a partially enlarged perspective view illustrating a state in which an exhaust duct and a convection device cover of a microwave oven according to an embodiment of the present invention are removed.

6 is a partially enlarged perspective view illustrating a state in which a temperature sensing unit of a microwave oven according to an embodiment of the present invention is installed;

7 is a partially enlarged perspective view illustrating a state in which a temperature sensing unit of a microwave oven according to another embodiment of the present invention is installed.

Claims (9)

A main body forming an appearance; An upper plate dividing an inner space of the main body into an upper space and a lower space; A blowing fan for flowing air in the main body inner space; A cooking chamber located in the lower space to provide a cooking space for food; A heating source for heating food in the cooking chamber; A convection device for flowing air in the inner space of the cooking chamber; And A temperature sensing unit for sensing an air outlet through which the air is discharged to the outside of the cooking chamber, and a temperature of the air entering through the convection suction port and the convection exhaust port through which the air between the cooking chamber and the convection device is introduced; Including, The temperature sensing unit is a hood-use microwave oven is installed on one side of the upper plate so that the shortest distance with any one of the exhaust port, the convection suction port and the convection exhaust port is less than the sum of the shortest distance with the rest. The method of claim 1, And the temperature sensing unit detects the temperature of the air entering and exiting through the exhaust port, the convection intake port, and the convection exhaust port conducted by the upper plate. The method of claim 1, The temperature sensing unit is a hood-use microwave oven is installed to contact the upper plate. The method of claim 1, The temperature detection unit is a microwave oven for detecting both the overheating by the heating source and the overheating by the convection device at the same time. The method of claim 1, The hood combined microwave when the temperature sensed by the temperature sensing unit exceeds a predetermined safety temperature, the power supplied to the main body is cut off. A main body forming an appearance; An upper plate dividing an inner space of the main body into an upper space and a lower space; A blowing fan positioned in an inner space of the main body to suck and exhaust air; A cooking chamber located in the lower space to provide a cooking space for food; A convection device located above the cooking chamber and having a convection exhaust port for flowing air from the inside of the cooking chamber to the outside space and a convection suction port for flowing air flowing through the exhaust port into the interior space of the cooking chamber; A gas exhaust port which is a passage through which exhaust gas generated in an inner space of the cooking chamber flows into the upper space; A temperature sensing unit configured to detect an abnormal state of the main body by at least a part of which is formed in an inner space of a figure formed when the convection exhaust port, the convection intake port, and the gas exhaust port face each other in a virtual straight line; Hooded microwave oven included. The method of claim 6, The temperature detection unit is installed in contact with the upper plate, the hood combined microwave oven to determine the abnormal state of the main body by sensing the temperature caused by heat conducted to the upper plate. The method of claim 6, The temperature detection unit is a hood combined microwave oven for recognizing an abnormal state of the convection device and the cooking chamber at the same time. The method of claim 6, The hood combined microwave controlled to cut off the power of the main body when the abnormal state of the main body is recognized by the temperature sensing unit.

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