KR100924072B1 - A fan and microwave oven comprising the same - Google Patents

Abstract

The present invention relates to a microwave oven. In the present invention, a plurality of parts are cooled by a fan that discharges air in two directions. Therefore, according to this invention, there exists an advantage which can cool a product with a simpler structure.

Microwave, Cooling, Fan, 2-Way

Description

A fan and a microwave oven including the same {A fan and microwave oven comprising the same}

The present invention relates to a microwave oven, and more particularly, to a fan and a microwave oven including the same that can cool the parts more smoothly.

In general, a microwave oven is a cooking apparatus for cooking food using microwaves and / or heater heat. Such microwave ovens are equipped with electrical components for generating microwaves and / or heaters for generating heater heat. And a microwave oven is provided with the cooling system for cooling the said electric component or / and a heater.

However, a cooling system provided in a conventional microwave oven does not efficiently cool the electric component and / or the heater. Therefore, a problem arises in that the operation reliability and efficiency of the microwave oven are deteriorated.

The present invention is to solve the conventional problems as described above, it is an object of the present invention to provide a fan and a microwave oven including the same is configured to cool the components more efficiently.

According to an embodiment of the present invention for achieving the above object, the present invention provides a fan housing having at least one intake unit and at least two exhaust units; And a blower rotatably installed in the fan housing to suck air through the intake unit and to discharge air through the exhaust unit; And a shortest distance (D1) (D3) between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the upstream end of the exhaust portion in the rotational direction of the blower, the inner circumferential surface of the fan housing at each downstream end. And an outer circumferential surface of the fan housing and an inner circumferential surface of the fan housing at an upstream end of any one of the exhaust parts in a rotational direction of the blower and determined as a larger value than the shortest distance D2 (D4) between the blower and the outer circumferential surface of the blower. The shortest distance (D1) (D3) between the shortest distance between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the downstream end of the other one of the exhaust portions adjacent to each other in a direction opposite to the rotational direction of the blower ( It is determined to be larger than D2) (D4).

According to another embodiment of the present invention, the present invention provides a fan housing including at least one intake unit and at least two exhaust units; And a blower rotatably installed in the fan housing to suck air through the intake unit and to discharge air through the exhaust unit; A flow cross-sectional area between an inner circumferential surface of the fan housing and an outer circumferential surface of the blower at an upstream end of the exhaust portion in a rotational direction of the blower, between an inner circumferential surface of the fan housing and an outer circumferential surface of the blower at each downstream end; The flow cross sectional area between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the upstream end of any one of the exhaust parts in the rotational direction of the blower is determined as a larger value than the flow cross sectional area of the blower, respectively. At a downstream end of the other one of the exhaust portions adjacent in the direction opposite to, it is determined to be larger than the flow cross sectional area between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower.

According to another embodiment of the present invention, the present invention is a cavity; A plurality of parts provided in the cavity; And the fan of any one of claims 1 to 12 forming an airflow for cooling the component in at least two directions. It includes.

According to the fan and the microwave oven including the same according to the present invention as described above, there is an advantage that the components can be cooled more efficiently.

Hereinafter, with reference to the accompanying drawings an embodiment of a fan and a microwave oven including the same according to the present invention will be described in more detail.

1 is an exploded perspective view showing an embodiment of a microwave oven according to the present invention, Figure 2 is a perspective view showing a porous portion constituting an embodiment of the present invention, Figure 3 is a rear view showing a back of an embodiment of the present invention. 4 is a front view showing the interior of the convection chamber constituting an embodiment of the present invention, Figure 5 is a cross-sectional view taken along line AA 'of Figure 4, Figure 6 is a side view showing one side of an embodiment of the present invention. 7 is a perspective view showing a part including a latch board constituting an embodiment of the present invention.

Referring to this, the upper plate 110, the bottom plate 120, and the inner plate 130 are respectively formed on the upper and lower surfaces, the bottom surface and both sides of the cavity 100 of the microwave oven. The inner plate 130 is formed in a U-shape that is opened toward the front as a whole and includes a rear portion and a pair of side portions.

The front plate 140 and the back plate 150 are coupled to the front and rear ends of the cavity 100, respectively. The front plate 140 and the back plate 150 substantially form the front and rear appearance of the microwave oven. The front plate 140 and the back plate 150 are formed in a rectangular plate shape extending outward from the upper surface of the upper plate 110, the bottom surface of the bottom plate 120, and the side surface of the inner plate 130, respectively. do.

In addition, the base plate 160 is coupled to the lower portion of the cavity 100. Front and rear ends of the base plate 160 are fixed to the lower end of the front plate 140 and the lower end of the back plate 150. In addition, the base plate 160 is spaced apart from the bottom plate 120 by a predetermined distance in a state coupled to the lower portion of the cavity 100.

The outer case 170 is coupled to the upper and both sides of the cavity 100. The outer case 170 includes an upper surface portion and a pair of side portions, and is formed in a c-shape that is open downward. And while the outer case 170 is coupled to the upper and both sides of the cavity 100, the upper surface portion and the side portion of the outer case 170, respectively, the side portion of the upper plate 110 and the inner plate 130 Spaced apart from the predetermined distance.

Meanwhile, the cooking chamber 101 is provided inside the cavity 100. Substantially, the upper plate 110, the bottom plate 120, and the inner plate 130 and the rear and side portions of the ceiling surface, the bottom surface, the rear surface, and both sides of the cooking chamber 101 are formed. The cooking chamber 101 is a place where food is cooked by microwaves and / or heater heat.

An electrical equipment chamber 103 is provided in the space between the upper plate 110 and the upper surface portion of the outer case 170. The electric component chamber 103 includes an electric heater component 200 for generating microwaves and an upper heater assembly 200 for generating heater heat, and first and second fan assemblies for cooling the electric component and upper heater assembly 200. 300 and 400 are installed. The electric component includes a magnetron 104 and a high voltage transformer 105.

Referring to FIG. 2, a porous portion 111 is provided in the electric field chamber 103 adjacent to the high voltage transformer 105, and substantially on the left side of the upper plate 110. The porous portion 111 of the upper plate 110 is formed in a long rectangular shape in the direction inclined at a predetermined angle with respect to the front and rear axes as a whole. The porous portion 111 of the upper plate 110 is shielded by a heater glass (not shown).

The porous portion 111 is provided with a reinforcement bead 113. The reinforcement bead 113 is formed in a closed linear shape in which a portion of the porous part 111 has a predetermined thickness. This is to prevent the phenomenon that the microwave is concentrated on the edge formed in the reinforcement bead 113. In other words, when the reinforcement bead 113 is formed in an open linear shape, it is to prevent a phenomenon in which microwaves are concentrated at both ends of the reinforcement bead 113. In the present embodiment, the reinforcing beads 113 are formed in a U-shape as a whole, but are not necessarily limited thereto. That is, for example, the reinforcement bead 113 may be formed in an elliptical shape or a track shape.

Referring back to FIG. 1, the upper heater assembly 200 is installed in the electric chamber 103 corresponding to the porous portion 111. The upper heater assembly 200 is a portion for generating a heater heat for radiant heating food in the cooking chamber 101. The detailed configuration of the upper heater assembly 200 will be described later.

The first fan assembly 300 is longitudinally installed on the right front end portion of the drawing of the electric compartment 103 corresponding to the front of the electric component. The first fan assembly 300 includes one fan motor 310 and a pair of fans 320 and 330. Hereinafter, among the fans 320 and 330 of the first fan assembly 300, the right side of the drawing is referred to as the first fan 320, and the left side of the drawing is referred to as the second fan 330. The first fan 320 of the first fan assembly 300 sucks indoor air to cool the electric parts including the magnetron 104 and the high-pressure transformer 105 and greases the inside of the cooking chamber 101. It forms an airflow to discharge water vapor. In addition, the second fan 330 of the first fan assembly 300 sucks indoor air to form an air flow for cooling the high pressure transformer 105 and the convection motor 760 to be described below by shielding. To this end, the first fan 320 of the first fan assembly 300 sucks air in the right direction on the drawing of the electric chamber 103 and discharges it toward the magnetron 104. In addition, the second fan 330 of the first fan assembly 300 sucks indoor air in a left direction on the drawing of the electric chamber 103 and discharges it toward the high voltage transformer 105 in the rear of the drawing.

The second fan assembly 400 is installed long in the front and rear at the left end of the electric chamber 103 corresponding to the left side of the drawing of the upper heater assembly 200. The second fan assembly 400 includes one fan motor 410 and a pair of fans 420 and 430 respectively provided at both sides of the fan motor 410. Hereinafter, among the fans 420 and 430 of the second fan assembly 400, the rear fan of the second fan assembly 400 is referred to as the first fan 420, and the front fan of the second fan assembly 400 may be referred to as a second fan 430. The first fan 420 of the second fan assembly 400 forms an air flow for cooling the lower heater 780 and the turntable motor 790 to be described below. To this end, the first fan 420 of the second fan assembly 400 is a part of the air flowing by the indoor air and the second fan 330 of the first fan assembly 300 in the electric field chamber 103 Suction to the rear and discharge it downward on the drawing. The second fan 430 of the second fan assembly 400 forms an air flow for cooling the upper heater assembly 200 and an air flow for cooling the lower heater 780 and the turntable motor 790. . To this end, the second fan 430 of the second fan assembly 400 sucks indoor air to the front of the electric field chamber 103 and discharges the upper heater assembly 200 and the lower side of the drawing. That is, the second fan 430 of the second fan assembly 400 is provided with first and second discharge parts 433 and 434 (see FIGS. 12 and 13) to substantially discharge air in two directions. The second fan assembly 400 forming such an air flow is selectively driven according to whether the upper heater assembly 200 is operated. That is, the second fan assembly 400 is driven when the upper heater assembly 200 is on, and is not driven when the upper heater assembly 200 is off. Detailed configuration of the second fan 430 of the second fan assembly 400 will be described later.

In addition, the electric chamber 103 is provided with a first air barrier 510. The first average 510 serves to prevent the air discharged by the first fan assembly 300 from being resorbed into the first fan assembly 300. In addition, the first air barrier 510 is substantially the right front end portion in the drawing of the electric field chamber 103, the first fan assembly 300 is installed and the electric component and the upper heater assembly 200 is installed It also serves to partition the rest of the battlefield chamber 103.

The first air barrier 510 is provided with a pair of outlets (not shown). The outlet of the first air barrier 510 is to transfer air discharged from the first and second fans 320 and 330 of the first fan assembly 300 to the electric field chamber 103.

In addition, the electric chamber 103 is provided with a second air barrier 520. The second air barrier 520 serves to prevent the air discharged from the second fan assembly 400 from being sucked back into the second fan assembly 400. In the present embodiment, the second air barrier 520 extends from the upper left corner of the cavity 100 toward the corner between the upper surface of the outer case 170 and the side surface of the left of the drawing.

The second air barrier 520 is provided with a pair of outlets 521 and 523 (see FIG. 6). In addition, the air discharged from the first and second fans 420 and 430 of the second fan assembly 400 through the outlets 521 and 523 of the second air barrier 520 is the inner plate 130. ) Is transferred to the space between the side portion on the left side of the drawing and the side portion on the right side of the drawing of the outer case 170. In addition, the second air barrier 520 is provided with a communication opening 525. The communication opening 525 is formed by cutting a portion of the rear end of the second air barrier 520 corresponding to the rear of the first fan 420 of the second fan assembly 400 in the drawing. The communication opening 525 is the first fan 420 of the second fan assembly 400 is stopped (of course the first and second fans 420, 430 of the second fan assembly 400 is one Driven by the motor 410 of the second fan assembly 400, even if the first and second fans 420 and 430 will be stopped at the same time), the second of the first fan assembly 300 A portion of the air flowing by the fan 330 flows into the space between the side portion on the left side of the inner plate 130 drawing and the side portion on the left side of the drawing of the outer case 170. The description of the second air barrier 520 will continue from the detailed description of the second fan assembly 400.

Upper and lower ends of the front plate 140 are provided with a plurality of inlets 141 and outlets 143, respectively. The inlet 141 and the outlet 143 of the front plate 140 are formed by cutting the upper end or the lower end of the front plate 140 into a predetermined shape. The inlet 141 and the outlet 143 of the front plate 140 serve as an inlet or outlet through which the air is intaken and exhausted by the first and second fan assemblies 300 and 400, respectively.

Meanwhile, a suction grill 600 is provided at a front end of the upper plate 110 corresponding to the rear of the suction port 141 of the front plate 140. The suction grill 600 is formed in the shape of a flat hexahedron having an approximately front surface opening. In addition, the suction grill 600 guides the indoor air sucked through the suction port 141 of the front plate 140 to the first and second fan assemblies 300 and 400. In addition, the suction grill 600 prevents a phenomenon in which an external foreign substance is inserted and prevents a phenomenon in which the heater heat of the upper heater assembly 200 is transferred to the room.

To this end, a plurality of suction holes 610 are formed on the front and upper surfaces of the suction grill 600 in the right part of the drawing of the suction grill 600 corresponding to the front of the electric component and the first fan assembly 300. do. In addition, a plurality of suction openings 630 are disposed on an upper surface of the suction grill 600 at a left side of the drawing of the suction grill 600 corresponding to the front of the upper heater assembly 200 and the second fan assembly 400. Is formed. As such, the configuration for the intake of air in the suction grill 600 is different from the position of the upper heater assembly 200 and the positions where the first fan assembly 300 and the second fan assembly 400 are installed. Because. That is, the suction opening 620 is formed only on an upper surface of the suction grill 600 adjacent to the second fan assembly 400 substantially adjacent to the upper heater assembly 200. In addition, since the suction part for sucking air is directed to both sides of the first fan assembly 300, even if the suction hole 610 is formed on the front surface of the suction grill 600, foreign matters are external to the first fan assembly 300. It is not inserted into the suction part of). However, since the suction part of the second fan assembly 400 faces forward and backward, the suction opening 620 is formed only on the upper surface in the left part of the drawing of the suction grill 600.

The control bracket 180 is provided at the top of the front plate 140. The control bracket 180 is formed in a plate shape having a width corresponding to the left and right widths of the front plate 140. At this time, the front surface of the control bracket 180 is located on the same plane as the front surface of the front plate 140.

And the control panel 190 is provided on the front of the control bracket 180. The control panel 190 receives various operation signals for the operation of the microwave oven and displays various information regarding the operation of the microwave oven. The control panel 190 shields the upper portion of the suction port 141 of the front plate 140 and the suction hole 610 of the suction grill 600 in a state in which the control bracket 180 is installed.

In addition, the control panel 190 is cooled by the indoor air sucked through the suction hole 610 and the suction opening 620 of the suction port 141 and the suction grill 600 of the front plate 140. The control panel In order to further increase the cooling efficiency of the 190, a heat sink (not shown) may be provided on the rear surface of the control panel 190 adjacent to the suction hole 610 and the suction opening 620 of the suction grill 600. Can be.

1 and 3, suction openings 151 and discharge openings 157 are provided at upper and lower ends of the back plate 150. The suction opening 151 and the discharge opening 157 of the back plate 150 are partially cut off of the back plate 150 corresponding to an upper portion of the upper plate 110 or a lower portion of the bottom plate 120. Is formed. The suction opening 151 of the back plate 150 serves as an entrance area through which the air cooled by the upper heater assembly 200 and the air cooled by the high pressure transformer 105 are sucked. Hereinafter, a part of the suction opening 151 of the back plate 150 which communicates with the electric chamber 103 corresponding to immediately after the high voltage transformer 105 is referred to as the electric chamber suction opening 153, and the upper portion A part of the suction opening 151 of the back plate 150 that communicates with the heater assembly 200 is called a heater suction opening 155. And the discharge opening 157 of the back plate 150 is in communication with the space between the bottom plate 120 and the base plate 160 is the air sucked through the suction opening 151 of the back plate 150 It acts as an exit outlet.

Referring back to FIG. 1, a convection chamber 710 is provided at the rear of the back plate 150 corresponding to the rear surface of the cooking chamber 101. The convection chamber 710 is in communication with the cooking chamber 101. The convection chamber 710 is formed by the back plate 150 and a convection cover 720 provided on the back surface of the back plate 150. The convection cover 720 is formed in the shape of a flat hexahedron having an approximately front surface opening.

3 and 4, a convection heater 730 and a convection fan 740 are installed in the convection chamber 710. As the convection heater 730, a sheath heater that is bent in a ring shape as a whole may be used. The convection fan 740 is located inside the convection heater 730 and rotates about a horizontal axis horizontally in front and rear of the convection heater 730. The convection fan 740 sucks air into its central portion and discharges it in the radial direction.

The convection heater 730 and the convection fan 740 are for convection heating of food in the cooking chamber 101. That is, when the convection fan 740 is driven, the food in the cooking chamber 101 is convection by air circulating in the cooking chamber 101 and the convection chamber 710 in a state that includes the heater heat of the convection heater 730. Heated.

A first air guide 750 is formed inside the convection chamber 710 so that the heater heat of the convection heater 730 is more evenly transmitted to the inside of the cooking chamber 101 by the driving of the convection fan 740. Is provided. The first air guide 750 guides the air discharged by the driving of the convection fan 740 toward the corner of the cooking chamber 101. Referring to FIG. 6, for this purpose, the first air guide 750 is inclined at a predetermined angle toward the front side, that is, toward the cooking chamber 101 toward the diameter direction of the convection fan 740. In addition, the first air guide 750 is positioned to be asymmetrical with respect to the center of rotation of the convection fan 740. Therefore, the air including the heat of the heater of the convection heater 730 is not only delivered to a specific portion of the cooking chamber 101 can be convection evenly as a whole.

A convection motor 760 is installed on the rear surface of the convection cover 720 corresponding to the outside of the convection chamber 710. The convection motor 760 drives the convection fan 740. The convection motor 760 cools the electric component and is cooled by the air sucked through the suction opening 151 of the back plate 150.

1 and 3, the back plate 150 is provided with a back cover 770. The back cover 770 is formed to have a size capable of shielding the suction opening 151 and the discharge opening 157 of the convection cover 720 and the back plate 150. Accordingly, the air sucked through the suction opening 151 of the back plate 150 is discharged through the discharge opening 157 of the back plate 150 between the back plate 150 and the back cover 770. The flow path of is formed.

A third air barrier 530 is provided between the back plate 150 and the back cover 770. The third air barrier 530 cools a flow path through which air that cools the upper heater assembly 200 flows in the space between the back plate 150 and the back cover 770 and the high pressure transformer 105. It serves to partition the flow path through which air flows. At this time, the convection motor 760 is located on a flow path through which air cooled the high-pressure transformer 105 flows.

Meanwhile, referring back to FIG. 1, the wave guide 540 is provided at the right side of the inner plate 130. The wave guide 540 guides the air cooled in the magnetron 104 and the microwaves generated from the magnetron 104 to the inside of the cooking chamber 101. To this end, both ends of the waveguide 540 are in communication with the cooking chamber 101 and the magnetron 104, respectively.

6, the discharge duct 550 is provided at a side portion on the left side of the inner plate 130 corresponding to the opposite side of the wave guide 540. The discharge duct 550 is guided into the cooking chamber 101 by the wave guide 540 to guide the air passing through the cooking chamber 101 downward. To this end, the discharge duct 550 may be formed in a hexahedral shape whose bottom surface is opened.

Although not shown, the discharge duct 550 is provided with a temperature sensor and a humidity sensor. The temperature sensor and the humidity sensor serve to detect the temperature and humidity of the air guided by the discharge duct 550 through the cooking chamber 101.

Meanwhile, a lower heater 780 is provided in the space between the bottom plate 120 and the base plate 160. The lower heater 780 generates a heater heat for radiant heating of food in the cooking chamber 101. As the lower heater 780, a ceramic heater may be used. The lower heater 780 is cooled by air flowing downward by the first and second fan assemblies 300 and 400.

A turntable motor 790 is provided in a space between the bottom plate 120 and the base plate 160 corresponding to the front of the lower heater 780. The turntable motor 790 serves to provide a driving force for rotation of a turntable (not shown) rotatably installed on the bottom surface of the cooking chamber 101. Like the lower heater 780, the turntable motor 790 is also cooled by air flowing downward by the first and second fan assemblies 300 and 400.

A fourth air barrier 560 is provided in the space between the bottom plate 120 and the base plate 160 corresponding to the right side of the lower heater 780 and the turntable motor 790 in the drawing. The fourth air barrier 560 is elongated in front and rear, and is transferred to the space between the bottom plate 120 and the base plate 160 to cool the lower heater 780 and the turntable motor 790. The inner plate 130 serves to prevent flow to the space between the side portion on the right side of the drawing and the side portion on the right side of the drawing of the outer case 170.

Meanwhile, referring to FIG. 7, the cavity 100 includes a pair of latch boards 810. The latch board 810 serves to prevent the door 820, which will be described below, from rotating arbitrarily in a state in which the cooking chamber 101 is shielded. The latch board 810 is fixed by a fastener such as a screw in close contact with the upper end of both side end portions of the front plate 140 and the upper end of the side portion of the inner plate 130. Accordingly, the latch board 810 is fixed to the cavity 100 in two directions orthogonal to each other, thereby preventing the position of the latch board 810 from being moved by an external force generated during the opening and closing of the door 820.

Referring back to FIG. 1, a door 820 is provided to selectively open and close the cooking chamber 101. The door 820 opens and closes the cooking chamber 101 in a pull-down manner in which an upper end rotates up and down about a hinge 821 provided at a lower end of the rear surface of the door 820. The upper end of the door 820 is spaced apart from the lower end of the control panel 190 by a predetermined distance. The front surface of the door 820 is located on the same plane as the front surface of the control panel 190.

The door 820 is provided with a pair of latch hooks 823. The latch hook 823 is fastened to the latch board 810 while the door 820 shields the cooking chamber 101. To this end, the latch hook 823 is provided at the upper end of both side ends of the rear surface of the door 820 corresponding to the latch board 810.

Next, a flow path constituting an embodiment of the microwave oven according to the present invention will be described.

Referring back to FIG. 1, a first passage P1 is provided at an upper portion of the cavity 100. The first flow path P1 is provided between the upper plate 110, the back plate 150, and one of an upper surface portion and a side portion of the outer case 170. Therefore, the first flow path P1 includes a part of the electric compartment 103 where the electric component including the magnetron 104 and the high voltage transformer 105 is located. In addition, the first flow path P1 is suction port 141 of the front plate 140 and the suction hole 600 of the suction grill 600 by driving the first and second fan assemblies 300 and 400. The air is sucked through 610 and is delivered to the sixth flow path P6 to be described below through the electric chamber suction opening 143 of the back plate 140.

The second passage P2 is provided at an upper portion of the cavity 100. The second flow path P2 includes a part of the electric chamber 103 where the upper heater assembly 200 is installed. A portion of the air cooled by the high pressure transformer 105 flows in the second flow path P2 while the first flow path P1 flows. The air flowing through the second flow path P2 is transferred to the first fan 420 of the second fan assembly 400.

Meanwhile, a third passage P3 is provided inside the upper heater assembly 200. Therefore, the third passage P3 is partitioned from the first passage P1, and the upper heater assembly 200 is cooled by air flowing through the third passage P3. The air flowing through the third passage P3 is transferred to the seventh passage P7 to be described below through the heater suction opening 145 of the back plate 150.

The fourth passage P4 is provided on the right side of the cavity 100 in the drawing. The fourth flow path P4 is substantially formed by the side portion on the right side of the drawing of the inner plate 130 and the wave guide 540. The fourth flow path P4 is a portion of air flowing through the first flow path P1 by the driving of the first fan assembly 300, that is, the first fan 320 of the first fan assembly 300. Wherein the air flowing through the first flow path (P1) by the drive of the flow. That is, the air passing through the cooking chamber 101 flows in the fourth flow path P4 while cooling the magnetron 104 and including microwaves. To this end, both ends of the fourth channel P4 communicate with the first channel P1 and the cooking chamber 101, respectively.

On the left side of the drawing of the cavity 100, a fifth flow path P5 formed by a side portion on the left side of the drawing of the inner plate 130 and a side portion on the left side of the drawing of the outer case 170 (see FIG. 6). ) Is provided. The second passage P2 flows in the fifth passage P5, and the air that indirectly cools the upper heater assembly 200 and the fourth passage P4 flows through the cooking chamber 101. Flows. The fifth flow path P5 is entirely partitioned from the first and second flow paths P1 and P2 by the second air barrier 520, but is substantially in communication with the second air barrier 520. A portion of 525 communicates with the second flow path P2.

In addition, a sixth flow path P6 is provided between the back plate 150, the convection cover 720, and the back cover 770 corresponding to the rear part of the cavity 100. The sixth flow path P6 is a portion of the air flowing through the first flow path P1, in detail, a place where air cooled by the high pressure transformer 105 flows. To this end, the sixth flow path P6 communicates with the full length chamber 103, that is, the first flow path P1, by the full length chamber suction opening 153 of the back plate 150. The convection motor 760 is positioned on the sixth flow path P6.

A seventh flow path P7 is also provided at the rear of the cavity 100. The seventh flow path P7 is provided between the back plate 150, the convection cover 720, and the back cover 770 substantially the same as the sixth flow path P6, and the third air barrier 530. ) Is partitioned from the sixth flow path P6. In addition, the seventh flow path P7 communicates with the inside of the upper heater assembly 200, that is, the third flow path P3, through the heater suction opening 155 of the back plate 150.

An eighth flow path P8 (see FIG. 6) is provided below the cavity 100. The eighth flow path P8 is provided between the bottom plate 120 and the base plate 160. The left end of the eighth flow path P8 communicates with the lower end of the fifth flow path P5 in the drawing. In addition, the eighth flow path P8 communicates with the sixth flow path P6 and the seventh flow path P7 by the discharge opening 157 of the back plate 150. In addition, the eighth flow path P8 is also in communication with the room by the outlet 143 of the front plate 140. However, the eighth flow path P8 is substantially partitioned from the first flow path P1 by the fourth air barrier 560. The lower heater 780 and the turntable motor 790 are positioned on the eighth flow path P8.

Next, the upper heater assembly constituting the embodiment of the microwave oven according to the present invention will be described in more detail with reference to the accompanying drawings.

8 is an exploded perspective view showing an upper heater assembly constituting an embodiment of the present invention, Figure 9 is a plan view showing a reflector constituting an embodiment of the present invention, Figure 10 is a first view constituting an embodiment of the present invention A perspective view showing a part of the heater cover.

Referring to this, the upper heater assembly 200 constituting the embodiment of the present invention is a heater supporter 210, a pair of heaters 220A (220B), a reflector 230, the first heater cover 240, the second The heater cover 250250 and the connection duct 260 are included.

The heater supporter 210 is for supporting the heaters 220A and 220B. The heater supporter 210 is formed in a substantially rectangular frame shape. In addition, the heater supporter 210 is fixed to an upper surface of the upper plate 110 adjacent to the porous portion 111 of the upper plate 110 while the heaters 220A and 220B are supported.

The heaters 220A and 220B substantially generate heater heat. In addition, the food inside the cooking chamber 101 is radiantly heated by the heater heat generated by the heaters 220A and 220B. In this embodiment, a halogen heater is used as the heaters 220A and 220B. Since the halogen heater has a relatively high heat generation amount as compared to other types of heaters such as a sheath heater and a ceramic heater, food can be cooked more efficiently. Hereinafter, a diagram in which the left side of the heater 220A and 220B is relatively adjacent to the second fan assembly 400 is relatively spaced apart from the first heater 220A and the second fan assembly 400. The one on the upper right is called the second heater 220B. In the state where the upper heater assembly 200 is installed on the upper plate 110, that is, the heater supporter 210 is fixed to the upper plate 110, the heaters 220A and 220B are elongated forward and backward. Is located. In this case, the heaters 220A and 220B may be inclined by a predetermined angle with respect to the axis in the front-back direction, similarly to the porous portion 111.

The reflector 230 reflects the heater heat of the heaters 220A and 220B to the cooking chamber 101. The reflector 230 is provided with a pair of concave portions 231 respectively surrounding the outer circumferential surfaces of the heaters 220A and 220B. The recess 231 is formed by recessing a portion of the reflector 230 spaced apart from the left and right in a substantially trapezoidal cross section.

The concave inlet 231 is provided with a plurality of cooling holes 233. The cooling hole 233 is for cooling the heaters 220A and 220B. 9, the cooling hole 233 is provided only on the surface and the upper surface of the concave inlet 231 spaced from each other. In other words, the cooling holes 233 are not formed on the surfaces of the concave portion 231 facing each other. This is a phenomenon in which one of the heaters 220A and 220B, that is, the air cooling the first heater 220A, is transferred to the other one of the heaters 220A and 220B, that is, the second heater 220B. It is to prevent. In addition, the cooling holes 233 are formed to have different diameters along the flow paths of air for cooling the heaters 220A and 220B. In other words, the cooling holes 233 located on the upstream side are formed with a relatively large diameter compared to the cooling holes 233 located on the downstream side. This is to allow the air for cooling the heaters 220A and 220B to cool down the heaters 220A and 220B while flowing along the flow path.

The first heater cover 240 shields the first and second heaters 220A, 220B and the reflector 230 supported by the heater supporter 210. The first heater cover 240 also serves to form a flow path through which air for cooling the first and second heaters 220A and 220B flows. That is, a third flow path P3 is formed between the upper surface of the upper plate 110 and the inner surface of the first heater cover 240 to cool the first and second heaters 220A and 220B. .

In the present embodiment, the first heater cover 240 is formed in a hexahedral shape having a rectangular cross section. In addition, an inlet part 241 and an outlet part 243 are provided at the front left side and the rear side in the longitudinal direction of the first heater cover 240, respectively. The inlet portion 241 of the first heater cover 240 passes through the second exhaust port 434 of the second fan 430 of the second fan assembly 400 to cool the heaters 220A and 220B. Enter the inlet area where the discharged air is sucked in. The outlet portion 243 of the first heater cover 240 serves as an outlet through which air sucked through the inlet portion 241 of the first heater cover 240 cools and discharges the heaters 220A and 220B. Do it. The inlet 241 of the first heater cover 240 communicates with the connection duct 260. The outlet portion 245 of the first heater cover 240 communicates with the suction opening 151 of the back plate 150. Positions of the inlet part 241 and the outlet part 243 of the first heater cover 240 may include a second exhaust port 434 and a back plate of the second fan 430 of the second fan assembly 400. It will be determined according to the relative position of the upper heater assembly 200 with respect to the suction opening 151 of 150.

In addition, referring to FIG. 10, a second air guide 245 is provided on the first heater cover 240. The second air guide 245 partitions and guides the air sucked through the inlet 241 of the first heater cover 240 toward the first heater 220A and the second heater 220B, respectively. It plays a role. To this end, the second air guide 245 includes a first guide part 246 and the first extending from the inlet 241 of the first heater cover 240 to the inside of the first heater cover 240. The second guide part 247 extending in the longitudinal direction of the first heater cover 240 to partition the air for cooling the first and second heaters 220A, 220B at one end of the first guide part 246. ). In this case, the first guide part 246 is bisected such that the inlet part 241 of the first heater cover 240 has the same flow cross-sectional area. In addition, the second guide portion 247 has a flow cross section in which air flows toward the second heater 220B to have a relatively large value compared to a flow cross section in which air flows toward the first heater 220A. It is located between the first and second heaters 220A and 220B. Therefore, regardless of the distance from the second fan assembly 400, the air flowing through the inlet 241 of the heater cover 240 flows equally toward the first and second heaters 220A. It becomes possible.

The second heater cover 250 serves to prevent the heater heat of the first and second heaters 220A and 220B from being transmitted to the electric component. To this end, the second heater cover 250 shields a part of the first heater cover 240 adjacent to the high voltage transformer 105.

The connection duct 260 connects the second fan 430 of the second fan assembly 400 and the first heater cover 240. To this end, both ends of the connection duct 260 are respectively the first and second discharge parts 433 and 434 and the first heater cover 240 of the second fan 430 of the second fan assembly 400. In communication with the inlet portion 241 of the.

Referring to FIG. 8 again, the first heater cover 240 is provided with a pair of thermostats 270. The thermostat 270 is to sense the temperature of the upper heater assembly 200, that is, the heaters 220A and 220B when the second fan assembly 400 is not driven. Therefore, when the second fan assembly 400 is driven, the temperature measurement of the heaters 220A and 220B by the thermostat 270 is not performed.

Next, a second fan assembly and a second air barrier constituting an embodiment of the microwave oven according to the present invention will be described in more detail with reference to the accompanying drawings.

11 is a perspective view illustrating a second fan assembly and a second air barrier constituting an embodiment of the present invention, and FIG. 12 is a perspective view illustrating a second fan of the second fan assembly constituting an embodiment of the present invention. 13 is a cross-sectional view showing a second fan of the second fan assembly constituting the embodiment of the present invention.

Referring to this, the second fan assembly 400 is fixed to the cavity 100 while being substantially mounted to the second air barrier 520. That is, as described above, the second air barrier 520 partitions the first flow path P1 and the fifth flow path P5 and at the same time the fan mounting bracket for mounting the second fan assembly 400. It also plays a role.

The second air barrier 520 is provided with a pair of outlets 521 and 523. Hereinafter, among the outlets 521 and 523 of the second air barrier 520, the rear end of the drawing will be referred to as a first outlet 521, and the front end of the second air barrier 520 will be referred to as a second outlet 523. First and second outlets 521 and 523 of the second air barrier 520 are formed by cutting a portion of the second air barrier 520. The first and second outlets 521 and 523 of the second air barrier 520 are formed to have different areas. That is, the second outlet 523 of the second air barrier 520 is formed with a relatively smaller area than the first outlet 521 of the second air barrier 520.

The first fan 420 (hereinafter referred to as a “first fan”) of the second fan assembly 400 is fixed to the rear surface of the fan motor 410 of the second fan assembly 400. The first fan 420 includes a fan housing 421 and a blower (not shown). An intake unit (not shown) is provided on a rear surface of the fan housing 421 of the first fan 420. The intake portion of the first fan 420 is a place where the air is sucked. In addition, an exhaust unit 423 is provided at one side of the outer circumferential surface of the fan housing 421 of the first fan 420. The exhaust part 423 of the first fan 420 is a place where air is discharged, and is formed in a rectangle having an area corresponding to the first outlet 521 of the second air barrier 520.

A second fan 430 (hereinafter referred to as a “second fan”) of the second fan assembly 400 is provided on the front surface of the fan motor 410 of the second fan assembly 400. The second fan 430 also includes a fan housing 431 and a blower 437 similarly to the first fan 420. The fan housing 431 of the second fan 430 is formed in a substantially horizontal cylindrical shape that is the same as the fan housing 421 of the first fan 420. The blower 437 of the second fan 430 is rotatably installed in the fan housing 431 of the second fan 430 in a counterclockwise direction about a horizontal axis.

Meanwhile, referring to FIG. 12, the fan housing 431 of the second fan 430 includes an intake part 432 and first and second exhaust parts 433 and 434. The intake portion 432 of the second fan 430 is provided on the front surface of the fan housing 431 of the second fan 430, and through the intake portion 432 of the second fan 430 Air is inhaled. The first exhaust part 433 of the second fan 430 is formed in a rectangle having an area substantially corresponding to the second outlet 434 of the second air barrier 520. The second exhaust part 434 of the second fan 430 is the second fan 430 corresponding to a position spaced apart from the first exhaust part 433 of the second fan 430 by a predetermined angle. The outer peripheral surface of the fan housing 431 is provided on one side. Therefore, the second fan 430 may be referred to as a two-way fan that can discharge air in different directions through the first and second exhaust parts 433 and 434 of the second fan 430, respectively.

Referring to FIG. 13, in order for the second fan 430 to discharge air in two directions, the first and second exhaust parts 433 and 434 of the second fan 430 may be divided into three types. The conditions must be met.

(1) The shortest distances D1 and D3 between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the upstream ends of the first and second exhaust portions in the rotational direction of the blower, that is, the air flow direction, It should be determined to be larger than the shortest distance D2 (D4) between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the downstream ends of the first and second exhaust portions.

(2) The shortest distance D1 (D3) between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the upstream end of the first or second exhaust portion in the rotational direction of the blower is the second or first, respectively. At a downstream end of the exhaust portion, it should be determined to be large compared to the shortest distance D4 (D2) between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower.

(3) The center angle A4 between the upstream end of the first exhaust portion and the downstream end of the second exhaust portion in the rotational direction of the blower is equal to or more than the center angle A1 relative to the rotation center of the blower of the first exhaust portion. And a center angle A2 between the downstream end of the first exhaust portion and the upstream end of the second exhaust portion should be determined to be a value greater than or equal to the center angle A3 relative to the center of rotation of the blower of the second exhaust portion. do.

In summary, the first exhaust portion 433 and the second exhaust portion 434 must satisfy the following inequality.

(1) D1> D2 and D3> D4

(2) D1> D4 and D3> D2

(3) A4> = A1 and A2> = A3

The above conditions (1) and (2) are conditions that must be satisfied in order to discharge air through the first and second exhaust parts 433 and 434. And condition (3) is a condition that must be satisfied in order to substantially secure the amount of air discharged through the first and second exhaust parts (433, 434).

Meanwhile, the ratio of air discharged to the first and second exhaust parts 433 and 434 may be adjusted by changing various conditions. That is, the center angle A4 between the upstream end of the first exhaust portion 433 and the downstream end of the second exhaust portion 434 or the downstream end and the second displacement of the first exhaust portion 433. By adjusting the center angle A2 between the upstream ends of the base 434, the proportion of air discharged to the first and second exhaust portions 433 and 434 is adjusted. In addition, by adjusting the area of the first exhaust portion 433 or the second exhaust portion 434, it is possible to substantially adjust the ratio of the amount of air discharged to the first and second exhaust portion 433,434. have. And a difference in the shortest distance between the upstream end portion and the downstream end portion of the first exhaust portion 433 and the outer circumferential surface of the blower 437 and / or the upstream end portion and the downstream end portion of the second exhaust portion 434. And by controlling the difference in the shortest distance between the outer peripheral surface of the blower 437, it is possible to adjust the ratio of the amount of air discharged to the first and second exhaust portion (433) (434). In addition, the difference between the shortest distance between the upstream end of the first exhaust portion 433 and the downstream end of the second exhaust portion 434 and the outer circumferential surface of the blower 437 and / or the second exhaust portion By adjusting the difference in the shortest distance between the upstream end of 434 and the downstream end of the first exhaust part 433 and the outer peripheral surface of the blower 437, the first and second exhaust parts 433 ( 434, the ratio of the amount of air discharged can be adjusted.

delete

Hereinafter, the flow of air in an embodiment of the microwave oven according to the present invention will be described in more detail with reference to the accompanying drawings.

First, when the first fan 320 of the first fan assembly 300 is driven, the first fan assembly through the inlet 141 of the front plate 140 and the inlet hole 610 of the suction grill 600. Indoor air is sucked into the intake portion of the first fan 320 of 300. The indoor air sucked in this way is discharged into the first flow path P1 through the exhaust of the first fan 320 of the first fan assembly 300 to cool the magnetron 104. At this time, the air discharged to the exhaust portion of the first fan 320 of the first fan assembly 300 to the intake portion of the first fan 320 of the first fan assembly 300 by the first air barrier 510. The phenomenon of resorption is prevented. The air cooled by the magnetron 104 flows through the fourth flow path P4, that is, the waveguide 540, in the state including the microwave generated from the magnetron 104, and is delivered into the cooking chamber 101. In addition, the air delivered to the inside of the cooking chamber 101 flows through the fifth flow path P5 in a state of containing oil and water vapor generated in the process of cooking food and is transferred to the eighth flow path P8.

In addition, when the second fan 330 of the first fan assembly 300 is driven at the same time as the first fan 320 of the first fan assembly 300, the suction port 141 and the suction of the front plate 140 are driven. Indoor air is sucked into the intake portion of the second fan 330 of the first fan assembly 300 through the suction hole 610 of the grill 600. The indoor air sucked into the intake portion of the second fan 330 of the first fan assembly 300 passes through the exhaust portion of the first fan 320 of the first fan assembly 300 to the first flow path P1. It is discharged to cool the high pressure transformer 105. Most of the air cooled by the high-pressure transformer 105 is transmitted to the sixth flow path P6 through the electric chamber suction opening 153 of the back plate 150. The air delivered to the sixth flow path P6 cools the convection motor 760 and is delivered to the eighth flow path P8 through the discharge opening 157 of the back plate 150.

When the upper heater assembly 200 is on, the second fan assembly 400 is also driven. When the first fan 420 of the second fan assembly 400 is driven, the second fan assembly is provided through the suction port 141 of the front plate 140 and the suction opening 620 of the suction grill 600. Indoor air is sucked into the intake portion of the first fan 420 of 400. In addition, a part of the air from which the second fan 330 of the first fan assembly 300 is discharged to the first flow path P1 through the exhaust part to cool the high pressure transformer 105 is also the second fan assembly 400. Suction into the intake portion of the first fan 420. As described above, the upper heater assembly 200 is indirectly cooled by the air sucked into the intake portion of the first fan 420 of the second fan assembly 400. In addition, the air sucked into the intake part of the first fan 420 of the second fan assembly 400 is discharged through the exhaust part 423 of the first fan 420 of the second fan assembly 400 to be discharged. 5 euros P5 is flowed and delivered to the 8th euro P8. At this time, the air discharged through the exhaust part 423 of the first fan 420 of the second fan assembly 400 is first or second of the second fan assembly 400 by the second air barrier 520. Re-absorption into the intake portions of the two fans 420 and 430 is prevented.

In addition, when the second fan 430 of the second fan assembly 400 is driven at the same time as the driving of the first fan 420 of the second fan assembly 400, the suction port 141 of the front plate 140 and Air is sucked into the intake part 432 of the second fan 430 of the second fan assembly 400 through the suction opening 620 of the suction grill 600. Part of the air sucked into the intake portion 432 of the second fan 430 of the second fan assembly 400 is the first exhaust portion 433 of the second fan 430 of the second fan assembly 400. ) Is discharged to the fifth flow path P5 and transferred to the eighth flow path P8. At this time, the air discharged into the fifth flow path P5 through the first exhaust portion 433 of the second fan 430 of the second fan assembly 400 is the first of the second fan assembly 400. Intake of the second fan 430 of the second fan assembly 400 by the second air barrier 520 is the same as the air discharged into the fifth flow path P5 through the exhaust of the fan 420. Re-absorption to the unit 432 is prevented.

Meanwhile, a part of the air sucked into the intake part 432 of the second fan 430 of the second fan assembly 400 may be a second exhaust part of the second fan 430 of the second fan assembly 400. 434 is transferred to the third passage P3, that is, the connection duct 260 and the first heater cover 240. The air delivered to the third flow path P3 cools the upper heater assembly 200, specifically, the first and second heaters 220B constituting the upper heater assembly 200. At this time, the air to cool the upper heater assembly 200 is divided into the first heater 220A and the second heater 220B by the second air guide 245 to guide the first and second heaters. The 220A and 220B can be cooled more efficiently. The air cooled by the upper heater assembly 200 is transferred to the seventh flow path P7 through the heater suction opening 155 of the back plate 150 and flows to the eighth flow path P8. . The air flowing through the seventh flow path P7 is partitioned and flows with the air flowing through the sixth flow path P6 by the third air barrier 530. Therefore, the phenomenon in which the convection motor 760 is heated by the air flowing in the seventh flow path P7 while the temperature is increased in the process of cooling the upper heater assembly 200 is prevented.

The air delivered to the eighth flow path P8 through the fourth to seventh flow paths P7 is discharged to the room through the discharge port 143 of the front plate 140. At this time, the lower heater 780 and the turntable motor 790 located on the eighth flow path P8 are cooled by the air flowing through the eighth flow path P8. Of course, the air delivered through the seventh flow path P7 in the state in which the upper heater assembly 200 is cooled among the air delivered to the eighth flow path P8 is hot air, but the temperature is significantly lower than that of the air transferred to the eighth flow path P8. The overall temperature of the air flowing through the eighth flow path P8 by the air transferred through the fourth and sixth flow paths P6 is relatively higher than the temperatures of the lower heater 780 and the turntable motor 790. Will be low. Therefore, the lower heater 780 and the turntable motor 790 may be cooled by the air flowing in the eighth flow path P8. And the air flowing through the eighth flow path (P8) is the side surface of the right side and the outer case 170 of the inner plate 130 is provided with the third flow path (P3) by the fourth air barrier (560). In the drawing, the phenomenon of being re-inhaled into the intake portion of the first or second fan 430 of the first fan assembly 300 through the space between the side portions of the right side is prevented.

On the other hand, when the upper heater assembly 200 is off, for example, in the case of cooking by the microwave and / or cooking by the convection heater, the first fan assembly 300 is driven, and the second The fan assembly 400 is not driven. More specifically, even when the upper heater assembly 200 is off, the first fan assembly 300 is driven in the same manner as described above. However, since the second fan assembly 400 is not driven, part of the air cooled by the second fan 330 of the first fan assembly 300 by the second fan 330 is the fifth channel ( It does not flow to P5). However, since the communication opening 525 is formed in the second air barrier 520, the second fan assembly 400 may be driven by the first fan 320 of the first fan assembly 300 even if the second fan assembly 400 is not driven. A portion of the air cooled by the high pressure transformer 105 may be transferred to the fifth flow path P5 through the communication opening 525 of the second air barrier 520.

In the case of cooking using the convection heater, the convection motor 760 is driven while the convection heater 730 is turned on. Therefore, the convection fan 740 is driven, so that the food in the cooking chamber 101 is convection heated by the heat of the convection heater 730. At this time, the air delivered to the inside of the cooking chamber 101 with the heater heat of the convection heater 730 by the driving of the convection fan 740 is evenly guided by the first air guide 750. More specifically, the first air guide 750 flows toward the edge of the cooking chamber 101 including air of the convection heater 730 discharged in the circumferential direction of the convection fan 740. To guide. Therefore, the food inside the cooking chamber 101 may be heated convection more efficiently by the heater heat of the convection heater 730.

Within the scope of the basic technical idea of the present invention, many modifications are possible to those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. will be.

According to the fan and the microwave oven including the same according to the present invention as described above can be expected the following effects.

First, in the present invention, the components constituting the microwave oven, the electrical components for generating microwaves, and the heaters for generating heater heat are more efficiently cooled by the first and second fan assemblies. Therefore, overheating of the parts can be prevented, thereby improving the operation reliability of the microwave oven.

In addition, in the present invention, one fan is used to discharge air in two directions. Therefore, it is possible to reduce the number of parts used for the cooling of the parts relatively at the same time, even when using a limited number of fans can be designed in a variety of positions of the parts.

In the present invention, the latch board is fixed by the respective fasteners on the side portions of the front plate and the inner plate. Therefore, the latch board is moved in the correct position by the external force generated during the opening and closing of the door, so that the latch board can be more accurately fastened.

In addition, according to the present invention, the size of the cooling hole for supplying air to the heater is formed differently according to the flow path through which the air flow formed by the fan assembly flows. Thus, the heater can be cooled more efficiently.

In the present invention, the convection motor is cooled by air cooled by low-temperature parts and cooled air by high-temperature parts by the third air barrier to cool the low-temperature parts, that is, low-temperature air. Therefore, the convection motor can be cooled more efficiently.

In the present invention, the phenomenon that the intake portion of the fan assembly is exposed to the outside through the suction grill is prevented. Therefore, the user can use the microwave more safely.

Meanwhile, in the present invention, the air including the heater heat of the convection heater is more efficiently transmitted to the inside of the cooking chamber by the first air guide. Therefore, the cooking using the convection device can be made more efficiently.

In the present invention, the air flow is evenly transmitted to the two heaters by the second air guide. Therefore, a plurality of heaters can be cooled uniformly.

In the present invention, a reinforcing bead formed in a closed linear form to prevent the formation of the end portion is provided in the porous portion for transmitting the heater heat to the cooking chamber. Therefore, the concentration of the microwave in the porous part is prevented, and even if a high output heater such as a halogen lamp is used, the phenomenon of thermal deformation of the porous part is prevented.

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

Figure 2 is a perspective view showing a porous portion constituting an embodiment of the present invention.

Figure 3 is a rear view showing the back of the embodiment of the present invention.

Figure 4 is a front view showing the interior of the convection chamber constituting an embodiment of the present invention.

5 is a cross-sectional view taken along the line A-A 'of FIG.

Figure 6 is a side view showing one side of an embodiment of the present invention.

7 is a perspective view showing a part including a latch board constituting an embodiment of the present invention.

8 is an exploded perspective view showing the upper heater assembly constituting an embodiment of the present invention.

9 is a plan view showing a reflector constituting an embodiment of the present invention.

10 is a perspective view showing a part of a first heater cover constituting an embodiment of the present invention.

11 is a perspective view illustrating a second fan assembly and a second air barrier constituting an embodiment of the present invention.

12 is a perspective view illustrating a second fan of a second fan assembly constituting an embodiment of the present invention.

FIG. 13 is a cross-sectional view showing a second fan of a second fan assembly constituting an embodiment of the present invention; FIG.

Claims (13)

A fan housing having at least one intake unit and at least two exhaust units; And A blower rotatably installed in the fan housing to suck air through the intake unit and to discharge air through the exhaust unit; Including, The shortest distance D1 (D3) between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the upstream end of the exhaust part in the rotational direction of the blower is the inner circumferential surface of the fan housing and the blower at each downstream end. It is determined to be larger than the shortest distance between the outer circumferential surfaces D2 and D4, The shortest distances D1 and D3 between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the upstream end of any one of the exhaust parts in the rotational direction of the blower are respectively opposite to the rotational direction of the blower. And a fan determined at a lower value than the shortest distance (D2) (D4) between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the downstream end of the other one of the adjacent exhaust sections. The method of claim 1, In the rotational direction of the blower, the center angles A1 and A3 with respect to the rotational center of the blower of any of the exhaust parts are adjacent to each of the upstream end portions in the direction opposite to the rotational direction of the blower. A fan determined to be less than or equal to the center angle A4 (A2) between the downstream ends of the other one of the bases. The method of claim 1, Adjusting the ratio of the air discharged through the exhaust port is a fan made by adjusting the difference of the shortest distance between the inner peripheral surface of the fan housing and the outer peripheral surface of the blower at the upstream end portion or the downstream end portion of the exhaust portion. The method of claim 1, The adjustment of the ratio of the air discharged through the exhaust port is adjacent to the direction opposite to the rotational direction of the blower and the shortest distance between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the downstream end of any one of the exhaust portions. And a fan formed by adjusting a difference in the shortest distance between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at an upstream end of the other one of the exhaust portions. The method of claim 1, The control of the ratio of the air discharged through the exhaust port, the fan is made by adjusting the center angle with respect to the rotation center of any one of the exhaust in the rotation direction of the blower. The method of claim 1, The adjustment of the ratio of the air discharged through the exhaust port adjusts the center angle between the upstream end of any one of the exhaust ports and the downstream end of the other one of the exhaust parts adjacent in the direction opposite to the rotational direction of the blower. Fan. A fan housing having at least one intake unit and at least two exhaust units; And A blower rotatably installed in the fan housing to suck air through the intake unit and to discharge air through the exhaust unit; Including, The flow cross sectional area between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the upstream end of the exhaust portion in the rotational direction of the blower is the flow cross sectional area between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at each downstream end. Determined by a large value, The flow cross-sectional area between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at an upstream end of any one of the exhaust portions in the rotational direction of the blower is different from each of the exhaust portions adjacent to each other in a direction opposite to the rotational direction of the blower. A fan determined at a downstream end with a larger value than the flow cross sectional area between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower. The method of claim 7, wherein In the rotational direction of the blower, the center angles A1 and A3 with respect to the rotational center of the blower of any of the exhaust parts are adjacent to each of the upstream end portions in the direction opposite to the rotational direction of the blower. A fan determined to be less than or equal to the center angle A4 (A2) between the downstream ends of the other one of the bases. The method of claim 7, wherein Adjusting the ratio of the air discharged through the exhaust port is a fan by adjusting the difference in the flow cross-sectional area between the inner peripheral surface of the fan housing and the outer peripheral surface of the blower at the upstream end or downstream end of the exhaust. The method of claim 7, wherein The adjustment of the ratio of the air discharged through the exhaust port is adjacent to a direction opposite to the direction of rotation of the blower and the cross section between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at the downstream end of any one of the exhaust portions. And a difference in flow section area between the inner circumferential surface of the fan housing and the outer circumferential surface of the blower at an upstream end of the other one of the exhaust portions. The method of claim 7, wherein The control of the ratio of the air discharged through the exhaust port, the fan is made by adjusting the center angle with respect to the rotation center of any one of the exhaust in the rotation direction of the blower. The method of claim 7, wherein The adjustment of the ratio of the air discharged through the exhaust port adjusts the center angle between the upstream end of any one of the exhaust ports and the downstream end of the other one of the exhaust parts adjacent in the direction opposite to the rotational direction of the blower. Fan. Cavity; A plurality of parts provided in the cavity; And 13. The fan of any one of claims 1 to 12, forming an airflow for cooling the component in at least two directions; Microwave including a.

Images