KR200217977Y1 - Convection motor assembly device in microwave oven - Google Patents

Abstract

The present invention is to reduce the parts necessary for the assembly of the motor used for the convection of the microwave oven, and the parts of the device for preventing the heat of the convection heater to be discharged to the outside. The present invention is the insulator 142 behind the cooking chamber 110, the motor 120 is directly installed on the protrusion 142 protruding outward so that the cooling fan 150 may be built, the inner surface of the insulator 140 The convection fan 122 and the cooling fan 150 are installed before and after the reflector 132 attached to block the protrusion 142 on the center, and the center of the reflector 132 is separated from the insulator 140. Since no insulation is required, since the motor 120 is directly installed on the insulator 140, a separate bracket can be omitted, thereby reducing the number of parts and improving productivity.

Description

CONVECTION MOTOR ASSEMBLY DEVICE IN MICROWAVE OVEN}

The present invention relates to a convection motor assembling apparatus of a microwave oven, in particular to improve the productivity by reducing the parts necessary for the assembly of the motor used for the convection, and the components to prevent the heat of the convection heater to be released to the outside. It is for.

In general, a microwave oven is a device for cooking food by a high frequency, and is divided into a cooking chamber and an electrical equipment room. In the electrical equipment room, a magnetron, a high pressure transformer, a cooling fan, etc. are installed, and the cooking chamber is provided with a tray on a bottom plate. The high frequency emitted by the magnetron is irradiated on the food.

In addition, in the microwave, since the high frequency oscillated from the magnetron is reflected and irradiated only in a certain direction, the high frequency is not uniformly irradiated on the food in the cooking chamber, so that a part of the food is overcooked and a part is not cooked. The tray rotation method to rotate the food placed on the tray as the tray is rotated by installing the tray motor so that high frequency is irradiated to the food evenly. It adopts the stirrer pan rotation method to be investigated.

In addition, the microwave oven has a single function microwave for cooking food using only high frequency and a grill cooking function for heating food by radiant heat of a heater installed at the upper or lower portion of the cooking chamber in addition to the high frequency or the convection pan installed at one side of the cooking chamber. It is divided into multi-functional microwave oven with oven cooking function that convections hot air by rotation.

An example of a conventional microwave oven having such an oven cooking function is shown in FIG. 1.

As shown in this figure, the convection fan 22 is provided in the rear outer wall of the cooking chamber 10, and the sheath heater 30 is provided in the circumference | surroundings of this convection pan 22 in a circular shape. The sheath heater 30 coats a metal around the hot wire coil, fills therein with magnesium oxide, and generates heat by supplying power to heat the surrounding air.

In addition, an intake hole 12 is formed in the outer wall of the cooking chamber 10 so that air is sucked into the center of the convection fan 22, and the heated air passing the sheath heater 30 by the convection fan 22 is cooked in the cooking chamber ( 10) the exhaust hole 14 is formed on the outer wall of the cooking chamber 10 to be introduced into the.

In addition, a reflector 32 is installed at the rear of the convection fan 22 to reflect the radiant heat generated from the sheath heater 30 to the front, and a heat insulating material 40 for heat dissipation is installed outside the reflector 32. An insulator 42 is provided behind the heat insulating material 40.

In addition, a guide 34 is installed between the heat insulating material 40 and the outer wall of the cooking chamber 10 to guide the blowing air to the exhaust hole 14.

On the other hand, a bracket 52 is provided outside the insulator 42, and a motor 20 for rotating the convection fan 22 is installed in the bracket 52. In order to prevent overheating of the motor 20, a cooling fan 50 that is rotated by the motor 20 is installed between the motor 20 and the bracket 52. Since the cooling fan 50 is blocked by the bracket 52 at the rear, a product that inhales air on the motor 20 side in front and disperses it to the outside.

The operation of the conventional microwave oven having such a configuration will be described.

When the motor 20 is driven to rotate the convection fan 22 and power is supplied to the sheath heater 30 to heat the surrounding heat, the air in the cooking chamber 10 passes through the intake hole 12 to the convection fan ( After being sucked to the center of 22, it moves up and down with reference to FIG. 1 and is heated through the sheath heater 30, and is discharged to the exhaust hole 14 by the guide 34. The heated air circulates in the cooking chamber 10 to heat and cook food, and then enters the intake hole 12.

At this time, the reflector 32 prevents the external separation of the heating air, and the heat insulating material 40 and the insulator 42 prevent the heat around the sheath heater 30 from flowing out or being transferred to the motor 20 side.

The cooling fan 50 is rotated by the rotation of the motor 20 to suck air around the motor 20 and disperse it up and down based on FIG. 1 to prevent the motor 20 from being cooled and overheated.

However, in the conventional microwave oven, the heat insulating material 40 must be used to prevent the heat of the reflector 32 from being transferred to the insulator 42, and the bracket 52 must be used to fix the motor 20. do. Therefore, the conventional microwave oven has a problem in that the productivity is low because the parts necessary for the assembly of the motor 20 and the parts for preventing the heat of the convection heater 30 from being discharged to the outside are excessive.

The present invention has been made to solve the conventional problems as described above, to reduce the parts necessary for the assembly of the motor used for the convection, and to prevent the heat of the convection heater to be discharged to the outside to reduce the productivity It is to improve.

Figure 1 is a side cross-sectional view showing a typical multifunctional microwave.

Figure 2 is a side cross-sectional view showing a portion of the microwave oven according to the present invention.

<Explanation of symbols for main parts of drawing>

110: cooking chamber 112: intake air

114: exhaust hole 120: motor

122: shaft 124: screw

126: convection fan 130: heater

132: reflector 134: coupling hole

140: insulator 142: protrusion

144: through hole 146: screw hole

148: vent 150: cooling fan

The present invention for achieving the above object, the protrusion projecting outwardly so as to incorporate a cooling fan, the screw hole is formed in the center of the protrusion and the through hole is inserted into the shaft of the motor and the screw fixing the motor And an insulator having air inflowing into the cooling fan and exhausting air from the cooling fan. It is achieved by providing a convection motor assembly apparatus for a microwave oven comprising a; reflector attached to the inner surface of the insulator to block the protrusion, the reflector having a coupling hole into which the shaft is inserted.

Hereinafter, the configuration and operation of the present invention as described above. 2 is a rear side cross-sectional view of the microwave oven according to the present invention.

As shown in this figure, the insulator 142 behind the cooking chamber 110 is formed with a protrusion 142 protruding outward so that the cooling fan 150 can be built therein, and a motor is formed at the center of the protrusion 142. The through hole 144 into which the shaft 122 of the 120 is inserted and the screw hole 146 to which the screw 124 to fix the motor 120 are fastened, and the ventilation hole 148 through which air of the cooling fan 150 passes. ) Is formed.

In addition, a reflector 132 is attached to an inner surface of the insulator 140 to block the protrusion 142, and a coupling hole 134 is formed in the center of the reflector 132.

The motor 120 is fixed to the insulator 140 by the screw 124, and the shaft 122 of the motor 120 is coupled to the reflector 132 through the through hole 140 of the insulator 140. 134). The shaft 122 is provided with a convection fan 126 on the inside with respect to the reflector 132, and a sheath heater 130 is provided in a circle around the convection fan 126.

In addition, an intake hole 112 is formed in the outer wall of the cooking chamber 110 to allow air to be sucked into the center of the convection fan 126, and the heated air passing the sheath heater 130 by the convection fan 126 is cooked in the cooking chamber ( An exhaust hole 114 is formed on an outer wall of the cooking chamber 110 to be introduced into the 110.

On the other hand, a cooling fan 150 for preventing overheating of the motor 120 is installed on the shaft 122 on the outside of the reflector 132.

The operation of the microwave oven having such a configuration will be described.

When the motor 120 is driven to rotate the convection fan 126 and power is supplied to the sheath heater 130 to heat the surrounding heat, the air in the cooking chamber 110 passes through the intake hole 112. 126 is sucked into the center of the center and moved up and down with reference to Figure 2 is heated through the sheath heater 130, and is discharged to the exhaust hole (114). The heated air circulates in the cooking chamber 110 to heat and cook food, and then enters the intake air 112 again.

At this time, the reflector 132 reflects the radiant heat of the sheath heater 130 toward the cooking chamber 110, and prevents heat around the sheath heater 130 from leaking out or being transferred to the motor 120.

In addition, the cooling fan 150 rotates by the rotation of the motor 120 to suck the air around the motor 120 into the ventilation hole 148 of the insulator 140, and disperses it up and down based on FIG. 2 to form another ventilation hole 148. By discharging), the motor 120 is cooled to prevent overheating.

As described above, since the center of the reflector 132 is separated from the insulator 140, the heat of the heated reflector 132 is prevented from being transferred to the insulator 140, thereby preventing heat transfer as in a conventional microwave oven. There is no need for a separate insulating material, and since the motor 120 is directly installed on the insulator 140, a separate bracket for assembling the motor 120 can be omitted.

As described above, the present invention, the insulator 142 behind the cooking chamber 110, the motor 120 is directly installed on the protrusion 142 protruding outward so that the cooling fan 150 may be built, the insulator 140 A convection motor assembly device in which a convection fan 122 and a cooling fan 150 are respectively installed before and after the reflector 132 attached to the inner side of the cover 142 to block the protrusion 142. The center of the reflector 132 is an insulator ( Since it is separated from the 140), a separate heat insulating material is not required, and since the motor 120 is directly installed on the insulator 140, a separate bracket can be omitted, thereby reducing the number of parts and improving productivity.

The invention has been shown and described with respect to a specific preferred embodiment, but the invention is not limited to the embodiment described above, the field to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims Anyone of ordinary skill in the art would be able to make various variations.

Claims (1)

Protruding portion 142 protruding outward so that the cooling fan 150 may be embedded, a through hole 144 and a motor 120 formed at the center of the protruding portion 142 and into which the shaft 122 of the motor 120 is inserted. Insulator 140 having a screw hole 146 to which the screw 124 is fixed and a ventilation hole 148 through which air is introduced into the cooling fan 150 and the air blown from the cooling fan 150 is discharged. ); A reflector 132 attached to an inner surface of the insulator 140 to block the protrusion 142 and having a coupling hole 134 into which the shaft 122 is inserted. Convection motor assembly.