KR20080082848A - A ventilation hooded microwave oven - Google Patents

Abstract

A microwave oven having a hood function is provided to raise spatial efficiency of a kitchen by rotating a lower part of a door in upper/lower directions on an upper part of the door of the microwave oven so that the microwave oven takes up little space in lateral direction. A microwave oven having a hood function of releasing smoke comprises a cavity assembly(100), a door(200) installed on the cavity assembly and at least one cam hinge. A cooking cavity for cooking food is provided inside the cavity assembly. The door is installed on the cavity so that a lower part of the door rotates in upper/lower directions on an upper part of the door to selectively open/close the cooking cavity. The door of open/closing the cooking cavity is supported against the cavity assembly through the cam hinge.

Description

Hooded microwave oven {A ventilation hooded microwave oven}

1 is an exploded perspective view showing a preferred embodiment of the hood combined microwave oven according to the present invention.

Figure 2 is a perspective view showing a combined state of the preferred embodiment of the present invention.

Figure 3 is a longitudinal cross-sectional view showing a latch board constituting a preferred embodiment of the present invention.

Figure 4 is a perspective view showing a door support bracket constituting a preferred embodiment of the present invention.

5 is a perspective view showing an air barrier constituting a preferred embodiment of the present invention.

Figure 6 is a perspective view of the vent grill and lead wire cap constituting a preferred embodiment of the present invention.

Figure 7 is a longitudinal sectional view showing the vent grill and the lead wire cap is installed in the cavity assembly constituting a preferred embodiment of the present invention.

8 is an exploded perspective view showing a door constituting a preferred embodiment of the present invention.

9 is a front view showing a door constituting a preferred embodiment of the present invention.

10a to 10c is an operation state showing a process of installing the door in the cavity assembly in a preferred embodiment of the present invention.

11a to 11e is an operating state showing the process of opening the door in a preferred embodiment of the present invention.

12a to 12c is an air flow diagram showing a state in which air flows according to a preferred embodiment of the present invention.

Figure 13 is a side view showing the main part of another embodiment of a hood-use microwave oven according to the present invention.

14 is a partial perspective view showing the main part of another embodiment of a hood-use microwave oven according to the present invention.

Fig. 15 is a perspective view showing a cam hinge constituting still another embodiment of the hood-use microwave oven according to the present invention.

Figures 16a and 16b is an operating state showing the operation of the cam hinge according to the rotation of the door in another embodiment of a hood-use microwave oven according to the present invention.

Explanation of symbols on the main parts of the drawings

100: cavity assembly 111: cooking chamber

113: suction through hole 115: discharge through hole

121: intake portion 123, 124: exhaust portion

125: terminal opening 127: service opening

129: opening and closing bracket 131: door support bracket

132: fixed rib 133: hinge bracket

134: hinge groove 135: fastening flange

136: fastener 137: hinge cover

138: hinged seating opening 139: through hole

141: spring fixing 143: spring fixing protrusion

145: latch slot 146: latch board

147: drive lever 148: latch switch

149: torsion spring 151: smoke inlet

153: battlefield 154: magnetron

155: capacitor 157: communication opening

159: cooling fan assembly 161: air barrier

162: cold air supply opening 163: guide portion

164: parts installation 165: parts installation

166: Vant Pan Assembly 167,168: Air Guide

169: VENT EUR 171, 172: Air duct

173: Vent Grill 174: Intake Euro

174A, 174B: Intake grill 174C: Intake opening

175, 176: exhaust passage 175A, 176A: exhaust port

175B, 176B: Exhaust opening 177: Compartment rib

178: fixed rib 178A: through hole

179: wire withdrawal opening 181: lead wire cap

182: wire drawing space 183: locking projection

183: handle rib 200: door

201: door cooling path 210: door panel

211: see-through opening 213: display opening

215: interference prevention unit 217: intake hole

219: exhaust hole 220: door frame

221: choke 223: porous part

225: interference prevention portion 227: hinge flange

228: hinge pin 229: spring retaining pin

230: chalk cover 231: see-through opening

233: interference prevention part 235: spring seat

237: latch opening 240: front cover

250: front glass 260: display unit

261: main printed circuit board 262: display device

262A: fixed bracket 263: backlighting printed circuit board

265: reflector 266: button

267: display cover 269: display glass

270: door handle 271: handle cooling path

281: latch projection 300: gas spring

310: cylinder 320: piston rod

S: Screw W: Leadwire

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven with a hood, and more particularly, to a hood microwave with a door that opens and closes a cooking chamber in a pull-up manner.

Microwave ovens are home appliances that cook food using microwaves and heater heat. In general, the microwave oven includes a cavity assembly having a cooking compartment, and a door for selectively opening and closing the cooking compartment, the other end of which is rotatably installed in the cavity assembly in a forward and backward direction.

On the other hand, the microwave oven may be provided with a hood function for guiding the discharge of smoke generated in the process of cooking food in a cooker installed in the interior of the cabinet below. In addition, recently, a display unit for receiving various operation signals for operating the microwave and displaying various information about the operation to the outside may be provided in the door.

However, the microwave oven and the microwave oven according to the prior art has the following problems.

As described above, the other end of the door rotates back and forth about its one end to selectively open and close the cooking chamber. Therefore, since the door is located in front of the cooking chamber in the open state of the cooking chamber, it is difficult to place an article in a space adjacent to both sides of the microwave oven.

In addition, the rotation of the door is not limited in the state in which the cooking chamber is opened. Therefore, in the process of dispensing food into and out of the cooking chamber, there is a fear that the door may be rotated arbitrarily and the dispensing of food may be disturbed.

And in the case of a microwave oven with a hood, it is provided in the inside of a furniture cabinet as mentioned above. However, with the microwave oven installed in the cabinet, the hinge assembly for rotatably supporting the door in the cavity assembly is located in the cabinet. Therefore, in order to separate the door from the cavity assembly, it is inconvenient to separate the microwave oven from the cabinet.

In addition, the hood combined microwave is provided with a flow path for the hood function in the cavity assembly. Therefore, the area where the electric component is provided in the cavity assembly, that is, the electric compartment is relatively reduced in area by the flow path.

In addition, various components including the electric component provided in the cavity assembly are also substantially located in the cabinet. Therefore, in order to repair or replace the electric parts, etc., the inconvenience of having to separate the microwave oven from the furniture cabinet occurs.

The door may be heated by heat generated in the process of cooking food in the cooking chamber. Therefore, the display unit provided in the door may be damaged or may be injured while the user grabs the door to open and close the door.

The present invention is to solve such a conventional problem, it is an object of the present invention to provide a hood-use microwave oven configured to more efficiently use the adjacent space.

Another object of the present invention is to provide a hood combined microwave is configured to facilitate the withdrawal of food for cooking.

Still another object of the present invention is to provide a hood-use microwave oven configured to facilitate the removal of the door.

Still another object of the present invention is to provide a hood-use microwave oven configured to secure an area of an electric compartment.

It is a further object of the present invention to provide a hooded microwave oven configured to facilitate repair or replacement of components.

Still another object of the present invention is to provide a hood-use microwave oven configured to minimize damage to the display unit provided in the door.

Still another object of the present invention is to provide a hood-use microwave oven configured to minimize injury to a user.

According to a feature of the present invention for achieving the above object, the present invention provides a hood for a microwave oven having a hood function for exhausting the smoke generated in the cooker provided below: a cooking chamber for cooking food A cavity assembly provided therein; A door configured to open and close the cooking chamber selectively at a bottom of the cavity assembly so as to be rotatable up and down about an upper end thereof; And at least one cam hinge supporting the door having the upper and lower ends pivoted about the cavity assembly with respect to the upper end to open or shield the cooking chamber. Characterized in that configured to include.

The cam hinge may rotate the door to the cooking chamber in a state in which the door is rotated by an angle larger than the reference position with respect to the upper end of the door based on any position of the rotational trajectory of the door rotating to open and close the cooking chamber. The door is applied with an external force in a rotational direction to open, and the door rotates to shield the cooking chamber in a state in which the door is rotated by an angle smaller than the reference position with respect to the upper end thereof. It is characterized by applying an external force to the door.

The cam hinge is hollow cam housing is formed long in the longitudinal direction; A hinge protrusion which protrudes through one end of the cam housing and rotates in association with a rotation of the door; A rotating cam installed inside the cam housing so as to rotate about the hinge protrusion and having a cam portion at one surface corresponding to an opposite side of the hinge protrusion; A movable cam installed in the cam housing so as to be movable in the longitudinal direction of the cam housing and having a cam portion selectively engaged with the cam portion of the rotating cam; And an elastic member for imparting an elastic force in the direction in which the cam portion of the pivoting cam and the cam portion of the movable cam are in close contact with the movable cam; And the cam part of the rotating cam and the cam part of the movable cam are completely engaged with or removed from each other by the elastic force of the elastic member when the door is rotated and the cooking chamber is completely opened and closed. The door is prevented from rotating freely, and in the process of opening and closing the cooking chamber, the cam part of the rotating cam is engaged with the cam part of the mobile cam by the elastic force of the elastic member in accordance with the rotation angle of the door. The door rotates in a direction of opening and closing the cooking chamber by rotating in the direction of removal.

The cam hinge is configured as a pair provided on both sides of the upper portion of the door so that the hinge protrusion protrudes in a direction away from each other.

The cam hinge may be configured as a pair provided on both upper sides of the cavity assembly such that the hinge protrusions protrude in a direction facing each other.

It characterized in that it further comprises a buffer means for absorbing the shock and noise generated in the process of rotating the door to shield the cooking chamber.

The buffer means is characterized in that the buffer member is provided on the lower front end of the cavity assembly or the lower rear surface of the door and having a predetermined elasticity.

It is provided on the upper front of the cavity assembly, characterized in that it further comprises a vent grill for discharging the air flowing in the inside of the cavity assembly to the outside.

The upper part of the door is characterized in that the door is provided with an interference prevention unit for preventing the interference with the vent grille in the process of rotating the lower end up and down about the upper end to open and close the cooking chamber.

The bent grill is formed of a curved surface having a predetermined curvature at the front and bottom thereof, and the interference prevention part is formed by cutting the upper portion of the door into a predetermined shape such that the vent grill is positioned inside.

The anti-interference part is shielded by a front member forming the front appearance of the door.

The front member is characterized in that the front glass.

According to the present invention, the efficient use of the adjacent space of the microwave oven, easy withdrawal of food to and from the inside and outside of the cooking chamber, easy separation of the door, secure sufficient space of the electrical compartment, easy repair / replacement of components, display It is possible to prevent the damage of the parts and the injury of the user.

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

1 is an exploded perspective view showing a preferred embodiment of a combined microwave oven according to the present invention, Figure 2 is a perspective view showing a combined state of a preferred embodiment of the present invention, Figure 3 is a constituting a preferred embodiment of the present invention Figure 4 is a longitudinal sectional view showing a latch board, Figure 4 is a perspective view showing a door support bracket constituting a preferred embodiment of the present invention, Figure 5 is a perspective view showing an air barrier constituting a preferred embodiment of the present invention, Figure 6 A perspective view showing a vent grill and a lead wire cap constituting a preferred embodiment of the present invention, Figure 7 is a longitudinal cross-sectional view showing a state in which the vent grill and lead wire cap is installed in a cavity assembly constituting a preferred embodiment of the present invention, 8 is an exploded perspective view showing a door constituting a preferred embodiment of the present invention, Figure 9 is a view constituting a preferred embodiment of the present invention The front view is shown.

As shown in the drawing, the cooking chamber 111 is provided inside the cavity assembly 100 of the microwave oven (hereinafter referred to as a "microwave oven"). The cooking chamber 111 is a place where food is cooked and is selectively opened and closed by the door 200 to be described below.

A plurality of suction holes 113 (see FIG. 12C) and discharge holes 115 (see FIG. 12C) are formed at one side and one side of the cooking chamber 111, respectively. The suction through-hole 113 is provided on the right side of the drawing of the cooking chamber 111 to serve as an entrance area through which air is introduced into the cooking chamber 111. The discharge hole 115 is provided at the left end of the upper surface of the cooking chamber 111 spaced apart from the suction hole 113 to serve as an outlet for discharging air flowing through the interior of the cooking chamber 111.

An intake part 121 and an exhaust part are provided at an upper end of the front surface of the cavity assembly 100. The intake part 121 is provided at one end of the front upper end of the cavity assembly 100 and at the right end of the drawing. The intake unit 121 is a portion in which air flowing through the inside of the cavity assembly 100 is sucked while the door 200 is cooled. The exhaust part includes a first exhaust part 123 provided at the other end of the front upper end of the cavity assembly 100 corresponding to the opposite side of the intake part 121, that is, the left end of the drawing, and the intake part 121. The first exhaust unit 123 is composed of a second exhaust unit 124 provided in the upper front center portion of the cavity assembly 100 corresponding to. The first exhaust part 123 is a place where the air flowing in the cavity assembly 100 is discharged to the outside. In addition, the second exhaust unit 124 is generated in the process of cooking food in a cooker provided below the microwave oven by driving the vent pan assembly 166 to be described below to the inside of the cavity assembly 100. This is where the incoming smoke is discharged.

A pair of terminal openings 125 are provided at an upper end of the front surface of the cavity assembly 100 corresponding to the first exhaust part 123 and the second exhaust part 124. A terminal housing (not shown) is installed to penetrate through the terminal opening 125 and protrude forward of the cavity assembly 100. The terminal housing is connected to a terminal (not shown) for transmitting power and various electrical signals to the display unit 260 provided in the door 200.

In addition, a service opening 127 is formed at a right end of the cavity assembly 100 corresponding to the opposite side of the exhaust part with respect to the intake part 121. The service opening 127 is for replacement of the capacitor 155 to be described below. Therefore, the size and shape of the service opening 127 is determined in consideration of the size of the capacitor 155. The service opening 127 is selectively opened and closed by the opening and closing bracket 129. The opening and closing bracket 129, that is, the service opening 127 is exposed to the outside only when the door 200 is rotated and the cooking chamber 111 is opened. In other words, the service opening 127 is formed at one side of the cavity assembly 100 in close contact with the rear surface of the door 200 in a state of shielding the cooking chamber 111.

Meanwhile, as shown in FIG. 4, door support brackets 131 are provided at both sides of the front side of the cavity assembly 100, respectively. The door support bracket 131 is for rotatably supporting the door 200 to the cavity assembly 100. The door support bracket 131 is formed to be vertically long and has a substantially L-shaped cross section. The front surface of the door support bracket 131 is in close contact with both ends of the front surface of the cavity assembly 100. The rear surface of the door support bracket 131 is provided with a fixing rib 132 fixed to the upper surface of the cavity assembly 100. The door support bracket 131 is provided with a hinge bracket 133 and a hinge cover 137, respectively.

The hinge bracket 133 is provided at the front end of the door support bracket 131 and protrudes forward through both front and top sides of the cavity assembly 100. The hinge bracket 133 is formed to have a U-shaped longitudinal cross-section that is opened upwardly and protrudes forward from the front surface of the cavity assembly 100. At this time, the hinge bracket 133 is at least a part of the cabinet, such that the fastening hole 136 to be described below is exposed to the outside of the cabinet in a state in which the microwave oven is installed in the cabinet above the cooker. Protrudes forward from the front of the (100).

Hinge grooves 134 are provided on both side surfaces of the hinge bracket 133, respectively. The hinge groove 134 is formed by cutting so that a portion of the upper end of both sides of the hinge bracket 133 is opened upward, the hinge groove 134 has a hinge pin 228 to be described below from above to below. Is inserted.

The hinge bracket 133 is provided with a fastening flange 135. The fastening flange 135 is formed by bending a portion of the bottom surface of the hinge bracket 133 in a rectangular shape that is formed long in the front and rear and has a substantially A-shaped longitudinal section. A fastening hole 136 for fixing the hinge cover 137 to the hinge bracket 133 is formed on the upper surface of the fastening flange 135. The fastening hole 136 of the hinge bracket 133 is formed on the upper surface of the hinge bracket 133 to be exposed to the outside of the furniture cabinet is installed microwave oven.

The hinge cover 137 is provided on an upper portion of the door support bracket 131 corresponding to the hinge bracket 133 and protrudes forward through both sides of the front upper end of the cavity assembly 100. The hinge cover 137 is formed to have a U-shaped longitudinal section that is opened toward the lower side. The hinge cover 137 is provided so that the front end of the hinge cover 137 is rotatable up and down to prevent the hinge pin 228 inserted into the hinge groove 134 from being arbitrarily removed.

To this end, hinge seating openings 138 are formed at lower ends of both sides of the hinge cover 137, respectively. The hinge seating opening 138 is formed by cutting a portion of the lower end of both sides of the hinge cover 137 to open downward. As the hinge cover 137 rotates, the hinge pin 228 inserted into the hinge groove 134 is inserted into the hinge seating opening 138 from below.

Meanwhile, the hinge bracket 133 is substantially inside the hinge cover 137 in a state where the hinge cover 137 is rotated downward, that is, the hinge pin 228 is inserted into the hinge seat opening 138. Is located in. As described above, in the state in which the hinge bracket 133 is positioned inside the hinge cover 137, upper ends of both sides of the hinge bracket 133 are tightly supported inside the upper surface of the hinge cover 137.

A through hole 139 is formed on the upper surface of the hinge cover 137. As the screw S penetrating the through hole 139 of the hinge cover 137 is fastened to the fastening hole 136 of the hinge bracket 133, the hinge cover 137 rotates downward to the hinge groove. It is prevented to rotate arbitrarily in the state which prevented the removal of the hinge pin 228 inserted in 134. As shown in FIG. Therefore, the hinge hole 139 of the hinge cover 137 is the hinge cover 137 is rotated downward, that is, the hinge bracket 137 in the state in which the hinge pin 228 to prevent the removal of the hinge bracket It is formed on one side of the hinge cover 137 so as to communicate with the fastening hole 136 of the (133) up and down. That is, the through hole 139 of the hinge cover 137 is also exposed to the outside of the furniture cabinet in the same way as the fastening hole 136 of the hinge bracket 133.

In addition, a spring fixing part 141 is provided to protrude forward through both front sides of the cavity assembly 100 corresponding to the lower side of the hinge cover 137. The spring fixing part 141 is for fixing the gas spring 300 to be described below. The spring fixing part 141 protrudes forward by a predetermined length through both front surfaces of the cavity assembly 100 in a state of being fixed to the door support bracket 131 in the cavity assembly 100. And the spring fixing part 141 is provided with a spring fixing protrusion 143 which is provided horizontally.

Latch slots 145 are provided on both sides of the front lower end of the cavity assembly 100, respectively. The latch slot 145 is formed by cutting a portion of both front lower ends of the cavity assembly 100 in a rectangular shape that is substantially left and right. The latch slot 145 is a portion through which the latch protrusion 281 to be described below is inserted.

As shown in FIG. 4, a latch board 146 is provided inside the cavity assembly 100 corresponding to the latch slot 145. The latch board 146 is provided with a driving lever 147, a pair of latch switches 148, and a pair of torsion springs 149. The driving lever 147 prevents the latch protrusion 281 inserted into the latch slot 145 from being arbitrarily detached, thereby preventing the door 200 from being arbitrarily rotated to open the cooking chamber 111. . In addition, the driving lever 147 is inclined upwardly by a predetermined inclination toward the rear by the latch protrusion 281 inserted into the latch slot 145 to operate the latch switch 148 on a predetermined direction or toward the front. The latch switch 148 is turned off by inclining downwardly. The latch switch 148 is turned on / off by the driving lever 147 to selectively operate the microwave oven, that is, cooking food by microwaves. In addition, the torsion springs 149 are fixed to one side of the latch board 146 and the driving lever 147, respectively, and the torsion spring 149 drives the elastic force to move the driving lever 147 downward inclined forward. ) Accordingly, when the latch protrusion 281 is removed from the latch slot 145, the driving lever 147 moves downward inclined forward.

On the other hand, the bottom of the cavity assembly 100 is provided with a smoke inlet 151. The smoke inlet 151 is a place where the smoke of the cooker flows into the cavity assembly 100 by driving the vent pan assembly 166. The smoke inlet 151 may be provided with a filter (not shown) for filtering foreign matter contained in the smoke of the cooker.

An electrical equipment chamber 153 is provided on one side of the upper surface of the cavity assembly 100 corresponding to the rear of the intake unit 121, that is, on the right side of the drawing. The electric component chamber 153 is provided with various electric components such as the magnetron 154 and the capacitor 155. Such electrical components serve to oscillate the microwave for cooking food. A communication opening 157 is formed at one side of the bottom surface of the electric compartment 153. The communication opening 157 is for supplying air cooled the electric component to the cooking chamber 111.

In addition, a cooling fan assembly 159 is provided at an upper end of the cavity assembly 100 adjacent to the intake unit 121. The cooling fan assembly 159 substantially removes the flow of air for cooling the door 200 and the moisture, oil, and odor generated in the process of cooling the electrical components and cooking food in the cooking chamber 111. It provides a driving force for forming a flow of air for. The suction part of the cooling fan assembly 159 is adjacent to the intake part 121, and the discharge part of the cooling fan assembly 159 is positioned to face the electric chamber 153, ie, rearward in the drawing.

In addition, an air barrier 161 is provided between the upper surface front end of the cavity assembly 100 and the electrical equipment chamber 153. The air barrier 161 substantially divides the electric component and the cooling fan assembly 159 and serves to guide the air flowing by the driving of the cooling fan assembly 159 toward the electric component. As shown in FIG. 5, the air barrier 161 is formed of a rectangular metal material having a predetermined length.

The air barrier 161 is provided with an air supply opening 162 through which air discharged through the discharge portion of the cooling fan assembly 159 is supplied to the electric compartment 153. In addition, the air barrier 161 is configured to guide air supplied to the electrical equipment chamber 153 through the air supply opening 162 to electrical equipments installed in the electrical equipment chamber 153, in particular the magnetron 154. Guide portion 163 is provided. In the illustrated embodiment, a portion of the air barrier 161 that is cut in a rectangle to form the air supply opening 162 is bent to guide the air toward the magnetron 154 with respect to the air barrier 161. The guide part 163 is formed.

One side of the air barrier 161 is provided with a component installation unit 164. The component installation unit 164 is formed by stepping a portion of the air barrier 161 toward the front surface of the cavity assembly 100 with respect to the rest of the air barrier 161. In addition, a component installation hole 165 is formed in the component installation unit 164. The component installation hole 165 is formed by cutting a part corresponding to the shape of the component 155, that is, a part of the component installation unit 164 corresponding to the position of the service opening 127.

A vent pan assembly 166 is provided at the rear end of the upper surface of the cavity assembly 100 corresponding to the rear of the second exhaust unit 124. The vent pan assembly 166 provides a driving force for forming a flow for discharging the smoke of the cooker to the front of the cavity assembly 100. To this end, the intake portion of the vent pan assembly 166 faces both sides of the cavity assembly 100, and the exhaust portion of the vent pan assembly 166 is the front end of the cavity assembly 100, that is, the second exhaust portion 124. Towards).

First and second guides 167 and 168 are provided on an upper surface of the cavity assembly 100 corresponding to the second exhaust unit 124 and the vent fan assembly 166. The first and second guides 167 and 168 are elongated forward and backward on the upper surface of the cavity assembly 100 and are substantially provided through the second exhaust unit 124 by the vent pan assembly 166. A vent flow path 169 through which the smoke of the cooker discharged to the outside flows is formed.

The first guide 167 is provided between the electric compartment 153 and the vent fan assembly 166 corresponding to the right side of the vent flow path 169 in the drawing. The first guide 167 substantially partitions the electric compartment 153 and the vent flow passage 169, and is formed in an approximately L shape surrounding the side and the rear surface of the electric compartment 153. In addition, the first guide 167 is stepped to the left in the drawing so that the flow cross-sectional area of the vent flow path 169 toward the second exhaust portion 124 is reduced. Accordingly, a part of the electrical chamber 153 is substantially protruded into the vent flow path 169 by the first guide 167.

In addition, a first air duct 171 is provided on one side of the cavity assembly 100. The first air duct 171 is introduced to the inside of the cavity assembly 100 by the cooling fan assembly 159 to guide the air cooling the electric component to the inside of the cooking chamber 111. To this end, the first air duct 171 is provided on the right side of the cavity assembly 100 corresponding to the lower side of the electric chamber 153 and communicates with the suction through hole 113 and the communication opening 157. do.

In addition, a second air duct 172 is provided at one side of the upper surface of the cavity assembly 100. The second air duct 172 is for guiding air flowing through the inside of the cooking chamber 111 to the first exhaust unit 123. Therefore, the second air duct 172 is provided on the left side of the upper surface of the cavity assembly 100 corresponding to the upper side of the cooking chamber 111 so as to communicate with the discharge through-hole 115 and the first exhaust 123. do.

The vent grill 173 is provided on the front surface of the cavity assembly 100 corresponding to the intake part 121 and the first and second exhaust parts 123 and 124. The vent grill 173 guides the air sucked into the cavity assembly 100 through the intake part 121 and is discharged to the outside by the first and second exhaust parts 123 and 124. It serves to guide the air and smoke.

As shown in FIG. 6, the vent grill 173 is formed in a polyhedron shape that is long in left and right. An intake passage 174 and first and second exhaust passages 175 and 176 are provided in the vent grill 173. The intake flow passage 174 and the first and second exhaust passages 175 and 176 correspond to the intake portion 121 and the first and second exhaust portions 123 and 124, respectively. It is provided inside of. That is, the intake passage 174 and the first exhaust passage 175 are provided at both sides of the vent grill 173, and the second exhaust passage 176 is the intake passage 174 and the first exhaust passage 175. ) Is provided in the center of the vent grill 173 corresponding to. In this case, the terminal housing is positioned substantially inside the first exhaust passage 175 while the vent grill 173 is installed on the front surface of the cavity assembly 100.

The vent grill 173 includes a pair of compartment ribs 177 for partitioning the intake passage 174 and the first and second exhaust passages 175 and 176. That is, the intake passage 174 and the first and second exhaust passages 175 and 176 are formed by the inner surface of the vent grill 173 and both surfaces of the partition rib 177.

The intake passage 174 guides the air sucked into the cavity assembly 100 through the intake unit 121. First and second intake grills 174A communicating with the intake flow passage 174 on the top and one side and the rear surface of the vent grill 173 corresponding to the top and one side and the rear surface of the intake passage 174 ( 174B) and an intake opening 174C. The first intake grill 174A is formed at the right side of the vent grill 173 in the drawing, and the second intake grill 174B of the vent grill 173 is adjacent to the first intake grill 174A. It is formed on the upper right side. The intake opening 174C is formed at the rear right side of the vent grill 173 corresponding to the second intake grill 174B. The first and second intake grills 174A and 174B serve as entrance zones through which the air cooled by the door 200 or the outside air is sucked into the intake passage 174. The intake opening 174C communicates with the intake unit 121 such that air sucked into the intake passage 174 is introduced into the cavity assembly 100 through the intake unit 121.

The first and second exhaust passages 175 and 176 guide air and smoke discharged to the outside of the cavity assembly 100 through the first and second exhaust portions 123 and 124. . At this time, the front of the vent grill 173 is rounded upwardly inclined so that air and smoke guided by the first and second exhaust passages 175 and 176 are guided upwardly of the cavity assembly 100. First and second exhaust openings 175A and first exhaust openings 175B are provided on the upper and rear surfaces of the vent grill 173 corresponding to the upper and rear surfaces of the first exhaust passage 175. The first exhaust opening 175A is formed on the left side of the upper surface of the vent grill 173, and the first exhaust opening 175B is a rear surface of the vent grill 173 corresponding to the first exhaust opening 175A. It is formed on the right side. The first exhaust vent 175A serves as an outlet through which air guided by the first exhaust passage 175 is discharged to the outside, and the first exhaust opening 175B communicates with the first exhaust unit 123. And guides air circulated inside the cavity assembly 100 to the first exhaust passage 175. A second exhaust 176A and a second exhaust opening 176B are provided on the upper and rear surfaces of the vent grill 173 corresponding to the upper and rear surfaces of the second exhaust passage 176. The second exhaust port 176A is formed at the center of the upper surface of the vent grill 173 corresponding to the second intake grill 174B and the first exhaust port 175A. The second exhaust opening 176B corresponds to a center of the rear surface of the vent grill 173 corresponding to the second exhaust opening 176A, that is, between the first intake grill 174A and the first exhaust opening 175B. Is formed in the center of the back of the vent grill (173). The second exhaust 176A serves as an outlet through which the smoke discharged to the outside of the cavity assembly 100 is discharged through the second exhaust 176A. In the illustrated embodiment, the second exhaust 176A is configured as a pair. The second exhaust opening 176B communicates with the second exhaust unit 124 to guide the smoke discharged to the outside of the cavity assembly 100 to the second exhaust passage 176.

On the other hand, a pair of fixed ribs 178 is provided at the rear end of the upper surface of the vent grill 173. The fixing rib 178 protrudes rearward from the rear end of the top grill 173 by a predetermined length. The fixing rib 178 is formed with a through hole 178A through which the screw S fastened to the front surface of the cavity assembly 100 passes.

In addition, a wire drawing opening 179 is formed on the left side of the vent grill 173 corresponding to one side of the first exhaust passage 175. As shown in FIG. 7, the wire lead-out opening 179 has lead wires W connecting the terminals and the display unit 260 coupled to the terminal housings to be drawn out and drawn into the inside of the door 200. Part. Therefore, the wire drawing opening 179 is preferably formed by cutting a portion of the left surface of the vent grill 173 by a predetermined length from the rear end to the front end thereof.

The lead wire cap 181 is detachably installed in the first exhaust passage 175. The lead wire cap 181 divides the first exhaust passage 175 into a portion in which air discharged to the outside of the cavity assembly 100 flows and a portion in which the lead wire W is located. . That is, a space substantially corresponding to the inside of the lead wire cap 181 serves as the first exhaust passage 175 through which air discharged to the outside of the cavity assembly 100 flows, and the vent grill 173 ) And the lead wire cap 181 serves as a wire drawing space 182 in which the lead wire W is located.

The lead wire cap 181 is formed in a polyhedral shape whose upper and rear surfaces are opened, and the front and both sides of the lead wire cap 181 are mounted on the first exhaust passage 175, respectively. And a distance from an inner surface of the vent grill 173 and one surface of the partition rib 177 corresponding to both side surfaces thereof. The lead wire cap 181 is attached to and detached from the inside and the outside of the first exhaust passage 175 through the first exhaust port 175A. The front end of the lead wire cap 181 is provided with a locking projection 183 and the handle rib 184. The locking protrusion 183 protrudes forward from the upper front end of the lead wire cap 181, and the handle rib 184 extends upward from the upper front end of the lead wire cap 181. The locking protrusion 183 is disposed inside the upper surface of the vent grill 173 adjacent to the first exhaust port 175A in a state in which the lead wire cap 181 is mounted inside the first exhaust channel 175. As a result, the lead wire cap 181 prevents the lead wire cap 181 from being arbitrarily removed from the first exhaust passage 175. In addition, the handle rib 184 is a part that the user grasps by hand to detach the lead wire cap 181 into and out of the first exhaust passage 175.

On the other hand, the door 200 for selectively opening and closing the cooking chamber 111 is installed in the cavity assembly 100 so that the lower end is rotated up and down about the upper end. As illustrated in FIG. 8, the door 200 includes a door panel 210, a door frame 220, a choke cover 230, a front cover 240, a front glass 250, and a display unit 260. And a door handle 270.

The door panel 210 is formed in a substantially rectangular shape, and forms the overall shape of the door 200. Perspective opening 211 is formed at the center of the door panel 210. The see-through opening 211 is for the user to identify the inside of the cooking chamber 111 from the outside without opening the door 200. Perspective opening 211 of the door panel 210 is formed by cutting the central portion of the door panel 210 in a substantially rectangular shape.

The display opening 213 is provided inside the door panel 210 corresponding to the lower side of the viewing opening 211 of the door panel 210. The display opening 213 of the door panel 210 is for exposing the display 260 to the outside. The display opening 213 of the door panel 210 is formed by cutting a portion of the door panel 210 corresponding to the lower side of the see-through opening 211 in a rectangular shape.

An interference prevention part 215 is provided at an upper end of the door panel 210. The interference prevention part 215 of the door panel 210 is connected to the vent grill 173 while the door 200 rotates up and down about its upper end to open and close the cooking chamber 111. This is to prevent interference. The interference prevention part 215 of the door panel 210 is formed by cutting a portion of the upper end of the door panel 210 to a size corresponding to the vent grill 173.

An intake hole 217 and an exhaust hole 219 are formed at an upper end of the door panel 210, respectively. The intake hole 217 serves as an entrance area through which the outside air is sucked into the door cooling passage 201 to be described below. The exhaust hole 219 serves as an outlet through which air flowing through the door cooling passage 201 is discharged to the outside. The intake hole 217 is provided at one end of the upper surface of the door 200 adjacent to the first exhaust port 175A while the door 200 is installed in the cavity assembly 100. In addition, the exhaust hole 219 is provided at one end of the interference prevention part 215 of the door panel 210 that is most spaced from the intake hole 217.

The door frame 220 is provided on the rear surface of the door panel 210. A plurality of chokes 221 are provided at the edge of the door frame 220. The choke 221 is for preventing the microwaves irradiated into the cooking chamber 111 from leaking to the outside. The central portion of the door frame 220 is formed with a porous portion 223 corresponding to the see-through opening 211 of the door panel 210.

In addition, the interference prevention part 225 is provided at the upper end of the door frame 220. The interference preventing part 225 of the door frame 220 is cut to a size corresponding to the interference preventing part 215 of the door panel 210, that is, the vent grill 173. It is formed.

A pair of hinge flanges 227 are provided at both sides of the upper end of the door frame 220, respectively. The hinge flange 227 is composed of a pair provided to be spaced apart by a predetermined interval to the left and right. In addition, the hinge pins 228 are horizontally provided between the hinge flanges 227. The hinge pin 228 is substantially the center of rotation of the door 200 and is inserted into the hinge seating opening 138 in a state of being seated in the hinge groove 134.

Spring fixing pins 229 are provided at both sides of the door frame 220 corresponding to the lower side of the hinge flange 227, respectively. The spring fixing pin 229 is for fixing the gas spring 300, and is located inside the spring seat 235 through one side of the spring seat 235 to be described below.

The choke cover 230 is provided on the rear surface of the door frame 220, that is, on the opposite side of the door panel 210 around the door frame 220 to form an exterior of the rear surface of the door 200. The choke cover 230 also has a perspective opening 211 of the door panel 210 and a part of its central portion corresponding to the porous portion 223 of the door frame 220 in a rectangular shape, so that the perspective opening 231 is cut. Is formed.

An interference prevention part 233 is also provided at the upper end of the choke cover 230. The interference prevention part 233 of the choke cover 230 is the same as the interference prevention part 215 of the door panel 210 and the interference prevention part 225 of the door frame 220, the upper part of the band Cut to a size corresponding to the grill 173 is formed.

Spring mounting parts 235 are provided at both sides of the choke cover 230, respectively. The gas spring 300 is seated on the spring seat 235 in a state in which the door 200 shields the cooking chamber 111. The spring seating part 235 is formed by recessing toward both sides of the choke cover 230 toward the door frame 220 in the shape of a cube that is vertically long.

In addition, latch openings 237 are provided at both sides of the choke cover 230 corresponding to the latch slot 145. The latch opening 237 is a portion through which the latch protrusion 281 protruding to the rear of the door 200 passes. The latch opening 237 is formed by cutting a portion of the choke cover 230 to have a predetermined length from side to side in a shape corresponding to a longitudinal section of the latch protrusion 281.

The front cover 240 is provided on the front of the door panel 210. The front cover 240 substantially forms the front appearance of the door 200 and may be formed of a metal material. In the illustrated embodiment, the front cover 240 is formed in a U-shape that is opened upwardly to surround the see-through opening 211 and the display opening 213 of the door panel 210.

The front glass 250 forms a front appearance of the door 200 together with the front cover 240. To this end, the front glass 250 is provided in a portion corresponding to the see-through opening 211 and the interference prevention portion 215 of the door panel 210. Therefore, the front glass 250 serves to shield the sight opening 211 and the interference prevention part 215 of the door panel 210.

The display unit 260 receives various operation signals for the operation of the microwave oven and serves to display various information related to the operation of the microwave oven to the outside. The display unit 260 is located inside the door cooling passage 201. The display unit 260 includes a main printed circuit board 261, a backlighting printed circuit board 263, a reflector 265, a display cover 267, and a display glass 269.

The main printed circuit board 261 is provided inside the door 200 corresponding to the display opening 213 of the door panel 210, that is, between the door panel 210 and the door frame 220. The display device 262 is provided on the front surface of the main printed circuit board 261. The display device 262 is exposed to the outside through the display opening 213 of the door panel 210 to display various information related to the operation of the microwave oven to the outside. As the display device 262, a vacuum fluorescence display (VFD) using light emission of a phosphor by a low speed electron beam may be used. The display device 262 is fixed to the main printed circuit board 261 by a fixing bracket 262A. In addition, the main printed circuit board 261 is provided with a plurality of electrical elements (not shown) for the operation of the display unit 260. The lead wire W, which is drawn out through the wire drawing opening 179 and drawn into the door 200, is connected to the main printed circuit board 261.

The backlighting printed circuit board 263 is provided inside the door 200 corresponding to the front of the main printed circuit board 261, that is, between the door panel 210 and the main printed circuit board 261. A plurality of light emitting diodes (not shown) are provided on the front surface of the backlighting printed circuit board 263. The light emitting diodes generate light for identification of the button 266 to be described below. The backlighting printed circuit board 263 is provided with a display opening through which the display device 262 passes.

In addition, the reflector 265 is provided inside the door 200 corresponding to the door panel 210 and the backlighting printed circuit board 263. The reflector 265 reflects light of the light emitting diode. A plurality of buttons 266 are provided on a front surface of the reflector 265, that is, one surface of the reflector 265 exposed to the outside through the display opening 213 of the door panel 210. The button 266 receives an operation signal for operating the microwave oven in a touch screen manner. The reflector 265 is also provided with a display opening corresponding to the display opening of the backlighting printed circuit board 263.

The display cover 267 is provided at the front of the reflector 265. Letters or shapes for identifying the button 266 are printed on the display cover 267. The display cover 267 may be a film coated with a conductive ITO (Indium Tin Oxide) compound so that the button 266 can receive an operation signal in a touch screen manner. Display openings corresponding to the display openings of the backlighting printed circuit board 263 and the reflector 265 are formed in the display cover 267.

The display glass 269 is provided on the front surface of the display cover 267 to form part of the front exterior of the door 200. To this end, the display glass 269 is formed in a rectangular shape corresponding to the display opening 213 of the door panel 210 and is mounted on the display opening 213 of the door panel 210.

In addition, the display unit 260 is configured as one unit and is fixed to the rear surface of the door panel 210. That is, the main printed circuit board 261, the backlighting printed circuit board 263, the reflector 265, the display cover 267, and the display glass 269 constituting the display unit 260 are the door 200. It is composed of one unit separate from other components constituting the fixed to the rear surface of the door panel 210.

In addition, the door handle 270 is a portion that the user grasps by hand to rotate the door 200, is formed in a hollow rod shape having a predetermined length is provided on the front cover 240 long left and right. Both ends of the door handle 270 are fixed to the door panel 210 through the front cover 240.

In addition, a pair of latch protrusions 281 are provided between the door frame 220 and the choke cover 230. The latch protrusion 281 penetrates through the latch opening 237 to protrude to the rear of the door 200. The latch protrusion 281 is for preventing the door 200 from rotating arbitrarily in a state in which the door 200 is shielded from the cooking chamber 111. The latch protrusion 281 is horizontally provided, and the latch protrusion 281 is formed with a latch hole into which the driving lever 147 is selectively inserted.

Meanwhile, a door cooling passage 201 is formed inside the door 200. The door cooling passage 201 is for cooling the door 200, particularly the display unit 260, and is substantially formed by the door panel 210 and the choke cover 230. The door cooling passage 201 is formed in a c-shape which is opened upward in the door 200 so that the upper end thereof communicates with the intake hole 217 and the exhaust hole 219, respectively.

In addition, a handle cooling passage 271 is provided inside the door handle 270. The handle cooling passage 271 is for cooling the door handle 270, and both ends thereof communicate with the door cooling passage 201. Therefore, a part of the air flowing through the door cooling passage 201 flows inside the handle cooling passage 271.

In addition, a pair of gas springs 300 are provided to support the door 200 with respect to the cavity assembly 100 while the cooking chamber 111 is opened. The gas spring 300 is a direction or shielding in which the door 200 rotates to open the cooking chamber 111 based on a position between the state in which the door 200 is completely opened and the state completely shielded. In order to rotate to provide an external force to the door 200 selectively. For example, based on the intermediate position of the state in which the door 200 is completely open and completely shielded (see FIG. 11C), the gas spring (in the state in which the door 200 is rotated upward) is compared. 300 provides an external force to the door 200 in such a manner that the cooking chamber 111 is opened, that is, the door 200 rotates upward. In addition, when the door 200 rotates downward as compared to the intermediate position of the reference, an external force is applied so that the gas spring 300 rotates downward to shield the cooking chamber 111. To 200.

Each of the gas springs 300 includes a cylinder cylinder 310 in which gas is filled therein, and a piston rod 320 inserted in the cylinder 310 so as to be linearly movable in the longitudinal direction by gas pressure. One end of the piston rod 320 is inserted through one end of the cylinder 310. The other end of the cylinder 310 and the other end of the piston rod 320 are rotatably supported on the front surface of the cavity assembly 100 and the rear surface of the door 200, respectively. In more detail, the other end of the cylinder 310 is rotatably supported by the spring fixing protrusion 143, and the other end of the piston rod 320 is rotatable by the spring fixing pin 229. Is supported.

Meanwhile, the gas spring 300 is seated on the spring seat 235 in a state where the door 200 is closed, that is, the cooking chamber 111 is shielded. Therefore, in the state in which the door 200 is closed to shield the cooking chamber 111, the gas spring 300 does not separate between the front surface of the cavity assembly 100 and the rear surface of the door 200. do.

Hereinafter will be described in more detail with reference to the accompanying drawings, the operation of the preferred embodiment of the combined microwave oven according to the present invention.

First, a process of installing a door in a cavity according to a preferred embodiment of a combined microwave oven according to the present invention will be described.

10A to 10C are operation state diagrams illustrating a process of installing a door to a cavity assembly in a preferred embodiment of a microwave oven according to the present invention.

In the state where the cavity assembly 100 is installed in a cabinet installed above the cooker, as shown in FIG. 10A, the door 200 is inserted such that the hinge pin 228 is inserted upward and downward from the hinge groove 134. It moves with respect to the cavity assembly 100. At this time, the fastening hole 136 of the hinge bracket 133 is exposed to the outside of the furniture cabinet.

In this state, as shown in FIG. 10B, the hinge cover 137 is rotated downward so that the hinge pin 228 inserted into the hinge groove 134 is not detached. At this time, the hinge pin 228 is inserted into the hinge seating opening 138 from below. In addition, the through hole 139 of the hinge cover 137 is in communication with the fastening hole 136 of the hinge bracket 133 up and down.

As shown in FIG. 10C, the screw S passes through the through hole 139 of the hinge cover 137 to prevent the hinge pin 228 from being removed. To be fastened to the fastening hole 136. As such, the screw S passes through the through hole 139 of the hinge cover 137 and is fastened to the fastening hole 136 of the hinge bracket 133, whereby the hinge cover 137 has the hinge pin ( 228) does not rotate arbitrarily in a state of preventing the removal of.

Meanwhile, as described above, the fastening hole 136 of the hinge bracket 133 and the through hole 139 of the hinge cover 137 are exposed to the outside of the furniture cabinet. Therefore, the worker can perform the operation of installing the door 200 in the cavity assembly 100 without separating the cavity assembly 100 to the outside of the furniture cabinet.

Next, a process of opening the door in the preferred embodiment of the combined microwave oven according to the present invention will be described.

11a to 11e is an operating state diagram showing a process of opening the door in a preferred embodiment of the present invention.

First, as shown in FIG. 11A, in the state in which the door 200 is closed, that is, the cooking chamber 111 is shielded, the rear surface of the door 200 is in close contact with the front surface of the cavity assembly 100. As such, the latch protrusion 281 is inserted into the latch slot 145 while the door 200 shields the cooking chamber 111. In addition, a driving lever 147 is inserted into the latch protrusion 281 inserted into the latch slot 145 to prevent the latch protrusion 281 from being arbitrarily removed from the latch slot 145.

In addition, the driving lever 147 is moved by the latch protrusion 281 inserted into the latch slot 145 to turn on the latch switch 148. In such a state, when an operation signal for operating the microwave oven is input through the button 266 of the display unit 260, the microwave oven operates according to the input operation signal to cook the food stored in the cooking chamber 111. do.

Meanwhile, when cooking of food is completed in the cooking chamber 111, the door 200 is opened to open the cooking chamber 111. To this end, when the user grabs the door handle 270 and pulls it upward inclined toward the front, as illustrated in FIG. 11B, the lower portion of the door 200 rotates upwardly with respect to the hinge pin 228 so that the cooking chamber ( 111) begins to open. By the rotation of the door 200 as described above, the latch protrusion 281 is removed from the latch slot 145. In addition, when the latch protrusion 281 is removed, the driving lever 147 is restored to the original position by the elastic force applied from the torsion spring 149.

The door 200 rotated in this way is given an external force to rotate in a direction of shielding the cooking chamber 111 from the gas spring 300, that is, the lower end pivots downwardly around the upper end thereof. Therefore, when the user does not continue to pull the door handle 270 upward inclined toward the front, the door 200 is rotated downward with respect to the hinge pin 228 to shield the cooking chamber 111. Let's go.

However, if the user continues to pull the door handle 270 upward inclined toward the front, the door 200 is rotated upward with respect to the hinge pin 228. As shown in FIG. 11C, when the door 200 is rotated upward relative to the intermediate position of the fully open state and the completely shielded state, the door 200 is connected to the gas spring ( External force from 300 to the lower end is rotated upward, that is, the external force in the direction to rotate to open the cooking chamber 111 is given.

Therefore, as shown in FIG. 11D, even if the door handle is not pulled upward and inclined upward, the door 200 rotates at the lower end of the door 200 upward to open the cooking chamber 111. As illustrated in FIG. 11E, the lower side of the door 200 is completely rotated upwardly around the hinge pin 228 so that the cooking chamber 111 is opened.

In this state, the food which has been cooked in the cooking chamber 111 may be taken out or the food to be cooked in the cooking chamber 111. By the way, the door 200 is given an external force to rotate the lower end upward with respect to the hinge pin 228 in order to open the cooking chamber 111 from the gas spring 300. Therefore, the door 200 is rotated arbitrarily so that the entrance and exit of food to and from the cooking chamber 111 is not disturbed.

On the other hand, when the withdrawal of food to and from the interior and exterior of the cooking chamber 111 is completed, the user grabs the door handle 270 by hand and slides downward toward the rear to shield the cooking chamber 111. As described above, the process of shielding the cooking chamber 111 is performed in the reverse order of the process of opening the cooking chamber 111. That is, when the user grabs the door handle 270 and pushes it downward inclined backward, the door 200 starts to rotate downward with respect to the hinge pin 228. And when the door 200 is rotated downward as compared to the position shown in Figure 11c, in order to open the cooking chamber 111 from the gas spring 300, the lower end around the upper end to rotate downward Granted. Therefore, even if the door handle 270 is not inclined downward toward the rear, the door 200 is rotated downward with respect to the hinge pin 228 to shield the cooking chamber 111.

Next, a state in which air flows according to a preferred embodiment of the hood-use microwave oven according to the present invention will be described.

12A to 12C are air flow diagrams showing a state in which air flows according to a preferred embodiment of the present invention.

First, when the microwave oven is operated, the cooling fan assembly 159 is driven to suck air into the door cooling passage 201 through the intake hole 217 of the door 200. As such, the air sucked into the door cooling passage 201 flows through the inside of the door cooling passage 201 by the continuous driving of the cooling fan assembly 159. 260 is cooled.

A portion of the air flowing inside the door cooling passage 201 is transferred to the handle cooling passage 271 to cool the door handle 270. As such, the air that cools the door handle 270 while flowing in the handle cooling channel 271 is transferred to the door cooling channel 201 again. In addition, air that cools the door 200 and the door handle 270 while flowing in the door cooling path 201 is discharged to the outside of the door cooling path 201 through the exhaust hole 219 of the door 200. do.

As shown in FIG. 12B, the air discharged to the outside of the door cooling flow path 201 through the exhaust hole 219 is discharged through the first intake grill 174A of the vent grill 173. It is delivered to the intake passage 174 of 173. And the air delivered to the intake flow path 174 of the vent grill 173 is inside the cavity assembly 100 through the intake opening 174C of the vent grill 173 and the intake portion 121 of the cavity assembly 100. Is inhaled. Of course, not only the air cooled by the door 200 through the first intake grill 174A of the vent grill 173, but also the outside air through the second intake grill 174B of the vent grill 173. It is introduced into the assembly 100.

The air sucked into the cavity assembly 100 is transferred to the electric chamber 153 through the air supply opening 162 of the air barrier 161 to cool the electric parts such as the magnetron 154 and the capacitor 155. Let's do it. At this time, the air delivered to the electric compartment 153 through the air supply opening 162 is guided toward the electric component by the guide part 163 of the air barrier 161. The air cooled by the electric component is guided to the first air duct 171 through the communication opening 157.

The air guided to the first air duct 171 is introduced into the cooking chamber 111 through the suction hole 113 of the cooking chamber 111, as shown in FIG. 12C. The air introduced into the cooking chamber 111 opens the discharge hole 115 of the cooking chamber 111 in a state that includes water, oil, and odor generated in the process of cooking food seated inside the cooking chamber 111. Guided to the second air duct 172 through. In addition, the air guided to the second air duct 172 is guided to the first exhaust passage 175 of the vent grill 173 through the first exhaust unit 123, so that the first exhaust port of the vent grill 173 ( It is discharged to the outside of the cavity assembly 100 through 175A. At this time, the first exhaust passage 175 of the vent grill 173 guides the air discharged to the outside of the cavity assembly 100 through the first exhaust mechanism 175A of the vent grill 173 upward.

On the other hand, as shown in Figure 12a, when the vent pan assembly 166 is driven, the smoke generated in the process of cooking food in the cooker through the smoke inlet 151 of the cavity assembly 100 cavity assembly 100 Flows into). In addition, the smoke of the cooker introduced into the cavity assembly 100 flows through the vent channel 169 by the continuous operation of the vent pan assembly 166, and thus the second exhaust unit 124 of the cavity assembly 100 is used. Guides to the second exhaust passage 176 of the vent grill 173. As described above, the smoke of the cooker guided to the second exhaust passage 176 of the vent grill 173 is discharged upward through the second exhaust mechanism 176A of the vent grill 173.

On the other hand, if the capacitor 155 is damaged in the process of using a microwave oven can be replaced without separating the cavity assembly 100 to the outside of the cabinet. That is, when the door 200 is rotated around the hinge pin 228 to open the cooking chamber 111, the service opening 127, that is, the opening and closing bracket 129 is exposed to the outside. In this state, the opening and closing bracket 129 is separated from the cavity assembly 100 to open the service opening 127. When the service opening 127 is opened, the capacitor 155 installed in the component installation hole 165 of the air barrier 161 is separated through this, and a new capacitor is installed. As described above, after replacing the capacitor 155, the opening and closing bracket 129 is fixed to the front surface of the cavity assembly 100 to shield the service opening 127, thereby completing the replacement operation.

Hereinafter, with reference to the accompanying drawings another embodiment of a hood-use microwave oven according to the present invention will be described in more detail.

Figure 13 is a side view showing the main part of another embodiment of a hood-use microwave oven according to the present invention, Figure 14 is a partial perspective view showing the main part of another embodiment of a hood-use microwave oven according to the present invention.

First, in the embodiment shown in FIG. 13, the hinge brackets 410 on both sides of the upper front side of the cavity assembly in order to support the door (not shown) in the cavity assembly (not shown) so that the lower end can be rotated up and down about the upper end thereof. Are respectively provided. A hinge groove 420 is formed at the tip of the hinge bracket 410. The hinge groove 420 is formed to be opened rearward. To this end, the front end of the hinge bracket 410 is formed in a U-shaped opening toward the rear.

In addition, the opening and closing members 430 are installed on both sides of the upper end of the cavity assembly adjacent to the hinge bracket 410 so as to be movable up and down. The opening and closing member 430 serves to selectively open and close the hinge groove 420. To this end, the opening and closing member 430 moves up and down in a state in which one side thereof is in close contact with one surface of the hinge bracket 410, and the front and rear thereof selectively opens and closes the hinge groove 420. At this time, the opening and closing member 430 is provided on both sides of the upper end of the cavity assembly so as not to overlap the hinge groove 420 forward and backward.

And both sides of the upper end of the cavity assembly is provided with an elastic member (not shown) for imparting an elastic force to move the opening and closing member 430 upward. For example, a coil spring installed up and down may be used as the elastic member. Therefore, the opening / closing member 430 does not move arbitrarily in the direction of opening the hinge groove 420 in the state in which the opening and closing member 430 shields the hinge groove 420 by the elastic force applied from the elastic member.

In addition, hinge flanges 440 configured as a pair are provided on both sides of the upper rear surface of the door to be spaced apart from each other by a predetermined interval. At this time, the distance between the hinge flange 440 should be at least equal to the sum of the left and right thickness of the hinge bracket 410 and the shielding member 430.

The hinge flange 440 protrudes rearward from both sides of the upper rear surface of the door, and the hinge pins 450 are horizontally provided between the hinge flanges 440. The hinge pin 450 is inserted into the hinge groove 420 from the rear to the front to become a pivot center of the door that is rotatably installed in the cavity assembly.

Referring to the process of rotatably installing the door in the cavity assembly according to the present embodiment configured as described above, the hinge pin 450 is positioned above the shielding member 430 by first moving the door. . When the door is moved downward in this state, the hinge pin 450 is also moved downward.

The hinge pin 450 is seated on one side of the hinge bracket 410 while moving the shielding member 430 downward. When the door is moved forward in such a state, the hinge pin 450 is also moved forward to be inserted into the hinge groove 420. At the same time, the hinge pin 450 is spaced apart from the shielding member 430 so that the shielding member 430 moves upward by the elastic force of the elastic member to shield the hinge groove 420. Therefore, the hinge pin 450 is prevented from being removed from the hinge groove 420 by moving backward in the state seated in the hinge groove 420.

In the embodiment shown in Figure 14, the hinge brackets 510 are provided on both sides of the front upper end of the cavity assembly (not shown). The hinge bracket 510 protrudes forward from a front upper side of the cavity assembly by a predetermined length. A hinge hole (not shown) is formed in the hinge bracket 510 so as to communicate left and right.

On the other hand, the hinge assembly 520 is formed on the upper surface of the rear surface of the door (not shown) which is installed to be rotated up and down about the upper end of the cavity assembly. do. The hinge flange 520 protrudes rearward from the top of the rear surface of the door.

A hinge pin 530 is provided on one surface of the hinge flange 520. The hinge pin 530 is horizontally provided at one end of one of the hinge flanges 510 so as to be spaced apart from one surface of the other of the hinge flanges 510 by a predetermined interval. The hinge pin 530 is inserted into the hinge hole in the horizontal direction.

In addition, the shielding member 540 is inserted between any one of the hinge flange 520 and the tip of the hinge pin 530 while the hinge pin 530 is inserted into the hinge hole. The shielding member 540 prevents the hinge pin 530 from being removed from the hinge hole by moving left and right in the state in which the hinge pin 530 is inserted into the hinge hole.

Hereinafter, another embodiment of a hood-use microwave oven according to the present invention will be described in more detail with reference to the accompanying drawings.

15 is a perspective view showing a cam hinge constituting still another embodiment of a hood-use microwave oven according to the present invention.

In this embodiment, the cooking chamber (not shown) provided inside the cavity assembly (not shown) is selectively opened and closed by a door (not shown). In addition, a pair of cam hinges 600 are provided to support the door in the cavity assembly so that the lower end thereof is rotatable upwardly.

The cam hinge 600 applies an external force to the door to cause the door to rotate in a direction of opening or shielding the cooking chamber according to the rotation angle of the door. That is, the cam hinge 600 has the door rotated by an angle larger than the reference position with respect to the upper end of the door based on any position of the rotational trajectory of the door rotating to open and close the cooking chamber. Imparts external force to the door in a rotational direction to open the cooking chamber, and the door rotates to shield the cooking chamber when the door is rotated by an angle smaller than a reference position about the upper end of the door. The external force in the direction to apply is applied to the door.

To this end, the cam hinge 600 has a cam housing 610 which is formed to extend in the longitudinal direction, a hinge protrusion 620 protruding from one end of the cam housing 610, and the cam housing 610. A rotary cam 630 rotatably installed around the hinge protrusion 620, a mobile cam 640 movably installed in a longitudinal direction of the cam housing 610 in the cam housing 610, and It is configured to include an elastic member 650 to impart an elastic force to the mobile cam 640. The cam hinge 600 is provided on both sides of the upper part of the door so that the hinge protrusion 620 protrudes away from each other.

The cam housing 610 forms an outer appearance of the cam hinge 600 and is formed in a hollow cylindrical shape having a predetermined length. A hinge hole 611 through which the hinge protrusion 620 penetrates is formed at one end of the cam housing 610.

The hinge protrusion 620 penetrates through the hinge hole 611, a part of which protrudes out of the cam housing 610, and a part of the hinge protrusion 620 is positioned inside the cam housing 610. The hinge protrusion 620 penetrates through the hinge hole 611 and protrudes out of the cam housing 610 to be inserted into a hinge hole (not shown) which is formed in the cavity assembly, thereby substantially eliminating the door. Become a center of meeting. The hinge protrusion 620 rotates relative to the cam housing 610 when the door rotates with respect to the cavity assembly.

The rotary cam 630 is provided on one of the hinge protrusions 620 located inside the cam housing 610. Therefore, when the hinge protrusion 620 is rotated by the rotation of the door, the rotary cam 630 rotates around the hinge protrusion 620 in the cam housing 610. A cam groove 631 is provided on one surface of the rotary cam 630 corresponding to the opposite side of the hinge protrusion 620. The cam groove 631 is formed by recessing a part of the rotary cam 630 into a predetermined shape.

Meanwhile, the mobile cam 640 moves in the longitudinal direction of the cam housing 610 by the rotation of the rotary cam 630. A cam protrusion 641 is provided on one surface of the mobile cam 640 facing the rotary cam 630, that is, one surface of the mobile cam 640 facing the cam groove 631. The cam protrusion 641 is formed to protrude in a shape in which a part of the rotary cam 630 is joined to the cam groove 631.

The elastic member 650 imparts an elastic force in the direction in which the mobile cam 640 is in close contact with the rotary cam 630 to the mobile cam 640. The elastic member 650 is installed inside the cam housing 610 in the longitudinal direction of the cam housing 610, both ends of the cam housing 610 corresponding to the opposite side of the hinge protrusion 620. A coil spring having both ends supported on one end of the mobile cam 640 is used.

Hereinafter will be described in more detail with reference to the accompanying drawings, the operation of another embodiment of a combined microwave oven according to the present invention.

Figures 16a and 16b is an operation state diagram showing the operation of the cam hinge according to the rotation of the door in another embodiment of a microwave oven with a hood according to the present invention.

First, in a state in which the door shields the cooking chamber, that is, the door does not rotate with respect to the cavity assembly, as shown in FIG. 15, the cam protrusion 641 is inserted into the cam groove 631 to rotate the cam 630. The surfaces facing each other of the mobile cam 640 are in close contact. Therefore, since the rotation cam 630 is prevented from rotating about the hinge protrusion 620, the door does not rotate to arbitrarily open the cooking chamber.

In such a state, when the user pulls the door upwardly inclined, the lower end of the door rotates upward with respect to the hinge protrusion 620. Therefore, as illustrated in FIG. 16A, when the hinge protrusion 620 rotates clockwise in the drawing by the rotation of the door, the cam protrusion 641 starts to be removed in the state of being inserted into the cam groove 631. do.

However, the mobile cam 640 is in a state of being given an elastic force in the direction in close contact with the rotary cam 630 from the elastic member 650. Therefore, the elastic member 650 in the state where the cam protrusion 641 is not completely removed from the cam groove 631, that is, the door is not rotated by a predetermined angle with respect to the hinge protrusion 620. A direction in which the door shields the cooking chamber about the hinge protrusion 620 by moving the cam 640 in the direction in which the cam protrusion 641 is inserted into the cam groove 631 by an elastic force of the cam protrusion 641. That is, the lower end rotates downward.

However, when the door is rotated at a lower end by a predetermined angle around the hinge protrusion 620, as shown in FIG. 16B, the cam protrusion 641 is completely removed from the cam groove 631, and one surface thereof. The state is in close contact with one surface of the rotary cam 630. Therefore, even if the elastic member 650 imparts an elastic force to the mobile cam 640, the hinge cam 630 by the rotary cam 630 by the friction force between the rotary cam 630 and the mobile cam 640. It does not rotate arbitrarily around. That is, the door is freely rotated downward with respect to the hinge protrusion 620 so as not to shield the cooking chamber.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

In the above-described embodiments, the spring seating groove in which the gas spring is seated is formed on the rear surface of the door, but the spring seating recesses may be formed on both sides of the front surface of the cavity assembly. In addition, a buffer member may be provided at any one side of a lower front surface of the cavity assembly and a lower surface of the rear surface of the door. Such a buffer member serves to absorb shock and noise between the cavity assembly and the door in the process of rotating the door to open and close the cooking chamber.

According to the hood-use microwave oven according to the present invention configured as described above, the following effects can be expected.

In the present invention, the door for selectively opening and closing the cooking chamber is configured to open and close by rotating the lower end up and down about the upper end. Therefore, even when the door is opened, the left and right spaces of the microwave oven can be freely used even when the cooking chamber is opened, thereby enabling the space of the kitchen where the microwave oven is installed to be used more efficiently.

In the present invention, the door is supported by the gas spring or the cam hinge in the open state the cooking chamber. Therefore, since the door is not disturbed by the door in the process of dispensing food into and out of the cooking chamber, the microwave oven can be used more conveniently.

In the present invention, the hinge assembly for rotatably supporting the door to the cavity assembly is exposed to the outside of the cabinet where the microwave oven is installed. Thus, the door can be separated from the cavity assembly without removing the microwave oven from the cabinet.

In addition, according to the present invention, the interference prevention portion is provided at the upper end of the door corresponding to the vent grill for guiding the air discharged from the inside of the cavity assembly to the outside. Therefore, it is possible to prevent the interference between the door and the vent grill in the process of opening and closing the cooking chamber by rotating the door.

On the other hand, according to the present invention, through the service opening provided on one side of the front surface of the cavity assembly, it is possible to repair or replace the electrical components installed in the electrical equipment room. This allows for simpler and faster maintenance of the product.

In the present invention, the flow guide area of the vane flow path is substantially reduced by the air guide so that the area of the electric compartment is increased. Therefore, while sufficiently securing the area of the electric compartment, it is possible to guide the air discharged to the outside of the cavity assembly by flowing through the vent channel.

In addition, in the present invention, the lead wire is drawn out / retracted through a space formed between the vent grill and the wire protection cap in order to connect various components provided in the cavity assembly and the display unit provided in the door. Therefore, damage to the lead wires is prevented, thereby ensuring operational reliability of the product.

According to the present invention, the display unit provided in the door is composed of one unit. Therefore, since the replacement and repair of the display unit is made more simple, maintenance and repair of the product becomes easier.

In addition, in the present invention, the door and the door handle are cooled by the air flowing therein. Therefore, a phenomenon in which the user is injured or damaged by the door or the door handle in the process of using the product is prevented.

Claims (12)

In a microwave oven with a hood function to exhaust the smoke generated in the cooker provided below to the outside: A cavity assembly having a cooking chamber for cooking food therein; A door configured to open and close the cooking chamber selectively at a bottom of the cavity assembly so as to be rotatable up and down about an upper end thereof; And At least one cam hinge for supporting the cavity assembly with the upper and lower doors pivoted about its upper end to open or shield the cooking compartment; Combined microwave oven, characterized in that configured to include. The method of claim 1, The cam hinge may rotate the door to the cooking chamber in a state in which the door is rotated by an angle larger than the reference position with respect to the upper end of the door based on any position of the rotational trajectory of the door rotating to open and close the cooking chamber. The door is applied with an external force in a rotational direction to open, and the door rotates to shield the cooking chamber in a state in which the door is rotated by an angle smaller than the reference position with respect to the upper end thereof. A hood-use microwave oven, characterized by imparting external force to the door. The method of claim 2, The cam hinge, Hollow cam housing is formed long in the longitudinal direction; A hinge protrusion which protrudes through one end of the cam housing and rotates in association with a rotation of the door; A rotating cam installed inside the cam housing so as to rotate about the hinge protrusion and having a cam portion at one surface corresponding to an opposite side of the hinge protrusion; A movable cam installed in the cam housing so as to be movable in the longitudinal direction of the cam housing and having a cam portion selectively engaged with the cam portion of the rotating cam; And An elastic member for imparting an elastic force in the direction in which the cam portion of the pivoting cam and the cam portion of the movable cam are in close contact; It is configured to include, When the door is rotated and the cooking chamber is completely opened and closed, the cam part of the rotating cam and the cam part of the mobile cam are completely engaged or removed by the elastic force of the elastic member, thereby allowing the door to be arbitrarily rotated. In the process of opening and closing the cooking chamber by the door, the cam part of the rotating cam rotates in a direction in which the cam part of the rotating cam is engaged with or removed from the cam part of the mobile cam by the elastic force of the elastic member. A hood-use microwave oven, characterized in that the door rotates in a direction to open and close the cooking chamber. The method of claim 3, wherein The cam hinge is a hood for a microwave oven, characterized in that composed of a pair provided on both sides of the upper portion of the door so that the hinge projection protrudes away from each other. The method of claim 3, wherein The cam hinge is a hood for a microwave oven, characterized in that composed of a pair provided on both sides of the upper portion of the cavity assembly so that the hinge protrusion is projected in a direction facing each other. The method according to any one of claims 1 to 5, And a shock absorbing means for absorbing shock and noise generated during the rotation of the door to shield the cooking compartment. The method of claim 6, The shock absorbing means is a hood and microwave oven, characterized in that provided in the lower end of the front of the cavity assembly or the bottom of the rear surface of the door and has a predetermined elasticity. The method of claim 7, wherein The microwave oven is provided on the upper front of the cavity assembly, further comprising a vent grill for discharging the air flowing in the inside of the cavity assembly to the outside. The method of claim 8, The upper portion of the door is a hood combined microwave, characterized in that the door is provided with an interference prevention unit for preventing the interference with the vent grille in the process of rotating the bottom up and down around the top to open and close the cooking chamber. The method of claim 9, The bent grill is formed of a curved surface having a predetermined curvature at the front and bottom thereof, The interference preventing unit is a microwave oven, characterized in that the upper part of the door is formed by cutting in a predetermined shape so that the vent grill is located inside. The method of claim 10, And the interference prevention part is shielded by a front member forming a front appearance of the door. The method of claim 11, The front member is a microwave oven, characterized in that the front glass.

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