KR100745814B1 - A air flow structure for microwave oven - Google Patents

Abstract

The present invention relates to an airflow structure of a microwave oven. The microwave oven of the present invention is installed between the upper plate 60b of the cavity 60 and the outer case 71 to provide a driving force to suck air through the intake port 70 and to be discharged to the exhaust port 94. The first air flow a, which is discharged from the assembly 80, the fan assembly 80 to cool the electrical components provided on the upper surface of the cavity 60, and the cavity 80 is discharged from the fan assembly 80. Second air flow (b) for cooling the convection motor assembly 102 provided at the rear end of the 60, and discharged from the fan assembly 80 is provided on the upper plate (60b) of the cavity 60, cooking chamber 62 It comprises a third air flow (c) for cooling the upper heater assembly 82 for supplying the furnace heat. According to the airflow structure of the microwave oven according to the present invention having such a configuration, the airflow (a, b, c) required for the microwave oven can be formed by one fan assembly 80, the number of parts is reduced, manufacturing cost This is reduced, because only one assembly of the fan assembly 80, the productivity is improved, and since the number of parts is relatively reduced, there is an advantage that the defective rate of the microwave oven is reduced.

Cavity, Airflow, Fan Assembly, Euro

Description

A air flow structure for microwave oven

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

Figure 2 is a partial side cross-sectional view showing the configuration of a microwave oven according to the prior art.

3 is a perspective view showing a microwave oven employing a preferred embodiment of the airflow structure according to the present invention.

Figure 4 is a perspective view showing one of the air flow formed in the microwave oven according to the present invention.

Figure 5 is a side view showing another one of the air flow formed in the microwave oven according to the present invention.

Figure 6 is a perspective view showing another one of the air flow formed in the microwave oven according to the present invention.

Explanation of symbols on the main parts of the drawings

60: cavity 62: cooking chamber

64: turntable 66: door

68: control panel portion 70: intake port

72: upper flow path 74: battlefield

76: high voltage transformer 78: magnetron

80: fan assembly 82: upper heater assembly

84: first euro 86: second euro

88: air duct 90, 90 ': ventilator

91: base plate 92: lower flow path

94: exhaust port 96: drive motor 102: convection motor assembly 104: convection motor chamber

106: cover 108: convection motor

110: convection chamber 112: convection fan

116: inlet 118: outlet

a: first airflow b: second airflow

c: 3rd air flow

The present invention relates to a microwave oven, and more particularly, an airflow of a microwave oven configured such that an airflow for cooling an electric component and a heater installed therein can be introduced into and out of the microwave oven by a single fan assembly. It's about structure.

1 is a perspective view showing a main portion of a microwave oven according to the prior art, and FIG. 2 is a partial side cross-sectional view showing the configuration of the microwave oven according to the prior art.

As shown in the drawing, the cooking chamber 4 is provided inside the cavity 2 of the microwave oven, and the turntable 6 in which the food is seated and cooked on the upper surface of the cooking chamber 4 is provided. An inlet 8 is provided at one side of the upper surface of the front plate 2a of the cavity 2 so that external air can flow into the cavity 2.

An upper flow path 10 through which air can flow is formed between an upper surface plate 2b forming an upper surface of the cavity 2 and an inner surface of an outer case (not shown), and an electron is formed on the upper flow path 10. The electric compartment 16 is equipped with various electric components such as the magnetron 12 and the high voltage transformer 14 for operating the range. The upper passage 10 and the electric compartment 16 are substantially the same space.

The electric component cooling fan assembly 18 is provided at one side of the electric compartment 16, that is, at one side of the part in which the electric component is provided. The electric component cooling fan assembly 18 serves to cool the electric component.

In addition, an upper heater assembly 20 is provided at one side of the electric compartment 16, that is, at one side of the upper plate 2b. The upper heater assembly 20 may be composed of a ceramic heater and a halogen heater, and serves as a heat source for cooking food in the cooking chamber 4. One side of the upper heater assembly 20 is provided with a heater cooling fan assembly (not shown) for cooling the upper heater assembly 20.

In addition, when the left and right side surfaces of the cavity 2 are formed, a first flow path through which the sucked air flows between the flange portion 2d formed by bending both ends of the plate 2c and the inner surface of the outer case ( 24 and a second flow path 26 are formed. An air duct 28 is provided at a portion of the cavity 2 in which the first flow passage 24 is formed. The air duct 28 is configured to allow air to flow from the upper passage 10 to the vent hole 30 formed in the flange portion 2d.

Meanwhile, a convection pan assembly 32 is provided at one side of the back plate 2e forming the rear surface of the cavity 2. The convection pan assembly 32 is installed to communicate with the cooking chamber 4, the convection chamber 36 provided with a convection pan 34 therein, and is shielded from the convection chamber 36 to convection motors therein. Consists of a convection motor chamber 40, 38 is installed.

One side of the convection motor chamber 40 is formed with a suction hole 42 to allow the outside air to flow to the inside. One side of the convection motor 38 is provided with a convection motor cooling fan assembly 44 for cooling the convection motor 38. In addition, a discharge hole 46 is formed at one side such that the airflow cooling the convection motor 38 is discharged to the outside of the convection motor chamber 40.

The lower surface plate 2c forming the lower surface of the cavity 2 is provided with a lower flow passage 48 through which the air flows in communication with the first flow passage 24 and the second flow passage 26. An exhaust port 50 is provided at the front end of the lower passage 48, that is, at the lower side of the front plate 2a to allow the internal air of the cavity 2 to flow to the outside. The drive motor 52 is provided on the lower passage 48. The drive motor 52 serves to provide power for rotating the turntable 6.

However, the airflow structure of the microwave oven according to the prior art as described above has the following problems.

In a conventional microwave oven, an electric component cooling fan assembly 18 for cooling the electric components, a heater cooling fan assembly for cooling the upper heater assembly 20, and a convection motor cooling fan for cooling the convection motor 38 are provided. Since a plurality of cooling fan assemblies such as the assembly 44 are required, there is a problem that the manufacturing cost of the microwave oven is increased.

In addition, since a plurality of cooling fan assemblies are separately assembled in the microwave oven, a large amount of installation space is required, resulting in a low design freedom of the microwave oven.

In addition, since the parts related to each of the plurality of cooling fan assemblies are separately required, the number of parts increases, so that the defect of the product increases.

Accordingly, the present invention is to solve the problems of the prior art as described above, an object of the present invention is to provide an air flow of the microwave oven configured to form a flow of air to heat dissipation inside by one cooling fan assembly To provide a structure.

It is another object of the present invention to provide an airflow structure of a microwave oven, in which only one cooling fan assembly is installed to simplify the assembly structure.

It is still another object of the present invention to provide an airflow structure of a microwave oven in which only one cooling fan assembly is installed to reduce the number of parts.

According to a feature of the present invention for achieving the above object, the present invention provides a microwave oven in which an air flow is formed between a cavity having a cooking chamber therein and an outer case constituting the exterior surrounding the cavity; A fan assembly positioned between the cavity and the outer case to provide a driving force for forming an air flow through the inside of the microwave oven, and cooling of the electrical component provided between the upper surface of the cavity and the outer case discharged from the fan assembly; And a second airflow configured to cool the convection motor assembly provided on the rear surface of the back plate which is discharged from the fan assembly and forms the rear surface of the cavity and forms convection inside the cooking chamber. Is discharged from the assembly is provided on the upper surface of the cavity to supply heat to the cooking chamber It is constituted by a third air flow for cooling the upper heater assembly; The first air flow and the second air flow is discharged through any one of the two discharge ports provided in the fan assembly, the third air flow is discharged through the other one of the two discharge holes provided in the fan assembly do.

The fan assembly is preferably installed between the front end of the upper plate and the outer case forming the upper surface of the cavity.

An inlet is formed at a position corresponding to the fan assembly on the front plate forming the front surface of the cavity, and an exhaust port for discharging air to the outside of the microwave oven is formed at the lower end of the front plate.

An upper flow path is formed between the upper surface of the cavity and the inner surface of the outer case, and first and second flow paths are formed between both side surfaces of the cavity and the inner surface of the outer case, respectively, and the lower surface of the cavity and the lower surface of the microwave oven are formed. Preferably, a lower flow path is formed between the base plates.

The first airflow flows from the upper flow passage to the lower flow passage through the first flow passage, and a part of the airflow is supplied into the cooking chamber to remove water vapor in the cooking chamber and is transferred to the lower flow passage through the second flow passage to exhaust. It is preferable to be discharged to the outside through.

The second air flow is preferably passed through the interior of the convection motor chamber in the upper flow passage to cool the convection motor and transferred to the lower flow passage to be discharged to the outside through the exhaust port.

The third airflow cools the upper heater assembly between the cavity and the outer case while flowing the upper flow passage, and flows into the lower flow passage along the second flow passage and is discharged to the outside through the exhaust port.

According to the airflow structure of the microwave oven according to the present invention having such a configuration, the airflow required for the microwave oven can be formed by one fan assembly, so that the number of parts is reduced, so that the manufacturing cost is reduced, and only one fan assembly is assembled. Therefore, productivity is improved, and since the number of parts is relatively reduced, there is an advantage in that the defective rate of the microwave oven is reduced.

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

3 is a perspective view showing a microwave oven employing a preferred embodiment of the airflow structure according to the present invention, Figure 4 is a perspective view showing one of the airflow formed in the microwave oven according to the present invention, Figure 5 is a side view showing another one of the air flow formed in the microwave oven according to the present invention. And, Figure 6 is a perspective view showing another one of the air flow formed in the microwave oven according to the present invention.

As shown in these figures, a cavity 60 is provided which forms a frame of a microwave oven. The cavity 60 forms a front plate 60a that forms a front surface, an upper plate 60b that forms an upper surface, a back plate 60c that forms a rear surface, and forms side and bottom surfaces of the cavity 60. It consists of a lower surface plate 60d.

Then, both sides of the bottom plate 60d are bent in the same direction to form a flange portion 60e, which forms the side surface of the cavity 60. Inside the cavity 60, a cooking chamber 62, which is a space for heating food, is provided. Inside the cooking chamber 62, a turntable 64 is installed on which food is placed and cooked on an upper surface thereof.

The cooking chamber 62 is selectively opened and closed by the door 66. The door 66 is rotatably installed on one side of the front surface of the microwave oven, and opens and closes the cooking chamber 62. The front of the microwave oven corresponding to the upper portion of the cooking chamber 62 is provided with a control panel 68 for operating the microwave oven. In addition, an inlet 70 is provided at one end of the front plate 60a to allow external air to flow into the microwave oven. For reference, an outer case 71 is provided to surround an upper surface and both sides of the cavity 60 to form an appearance.

An upper flow path 72 through which air flows is formed between the upper plate 60a and the inner surface of the outer case 71. In addition, the upper plate 60a, that is, one side of the upper flow passage 72 is provided with an electrical equipment chamber 74 in which various electrical components for oscillating microwaves are installed. The upper flow passage 72 and the electric compartment 74 are substantially the same space.

The electric field chamber 74 is provided with a high voltage transformer 76 for amplifying the applied power to a high voltage, and a magnetron 78 for oscillating the microwave using a high voltage voltage supplied from the high voltage transformer 76. This is installed. In addition, a fan assembly 80 is installed at one side of the electric compartment 74, that is, adjacent to the intake port 70. The fan assembly 80 forms the overall air flow inside the microwave oven. As shown in FIG. 4, the fan assembly 80 may include one motor and a sirocco fan provided at both sides thereof. The sirocco fan constituting the fan assembly 80 is provided with a discharge port, respectively. That is, the fan assembly 80 is provided with two discharge ports. Since the configuration of the fan assembly 80 is known, a detailed description thereof will be omitted.

On one side of the upper plate (60b), the upper heater assembly 82 for providing heat for heating the food seated in the cooking chamber 62 is provided. The upper heater assembly 82 may be composed of a ceramic heater and a halogen heater.

In addition, a first flow path 84 and a second flow path 86 through which the sucked air may flow between the flange part 60e forming the left and right side surfaces of the cavity 60 and the inner surface of the outer case 71. (See Fig. 6) are formed respectively. An air duct 88 is provided at a portion of the flange portion 60e in which the first flow path 84 is formed. The air duct 88 guides the air cooled in the electric component to the cooking chamber 62. A vent hole 90 is formed at one side of the flange portion 60e to form an upper flow path along the air duct 88. In operation 72, air may flow into the cooking chamber 62.

A vent hole 90 '(see Fig. 6) is also formed in the flange portion 60e of the cavity 60 in the portion where the second flow passage 86 is formed. The vent hole 90 ′ serves to discharge air from the cooking chamber 62 to the second flow path 86.

The bottom plate 60d of the cavity 60 is shielded by the base plate 91 and has a lower flow path through which air can flow between the bottom surface of the bottom plate 60d and the top surface of the base plate 91. 92 is formed. An exhaust port 94 may be provided at a front surface of the lower channel 92, that is, at a lower side of the front plate 60a so that the outer channel and the lower channel 92 communicate with each other.

A driving motor 96 (see FIG. 5) for driving the turntable 64 is provided below the bottom plate 60d. Of course, the drive motor 96 is installed on the lower passage (92). The lower plate 60d may include a lower heater assembly (not shown) for providing thermal energy to the cooking chamber 62.

And, as shown in Figure 5, one side of the back plate 60c is provided with a convection motor assembly 102. The convection motor assembly 102 is provided with a convection motor chamber 104. The convection motor chamber 104 is a space formed between the outer surface of the back plate 60c and the inner surface of the cover portion 106 by having a cover portion 106 disposed outside the back plate 60c.

The convection motor 108 for driving the convection fan 112 to be described below is provided in the convection motor chamber 104. In front of the convection motor chamber 104 is provided a convection chamber 110 in communication with the cooking chamber 62. The convection fan 112, which is driven by the convection motor 108 and forms a convection airflow in the cooking chamber 62, is installed inside the convection chamber 110. In addition, a convection heater assembly (not shown) may be provided in front of the convection pan 112 as another heat source in the cooking chamber 62.

An inlet 116 is formed to allow air to flow between the convection motor chamber 104 and the upper flow passage 72. In addition, an outlet 118 is formed to allow air to flow between the convection motor chamber 104 and the lower flow path 92.

Hereinafter, the operation of the airflow structure of the microwave oven according to the present invention having the configuration as described above in detail.

When the operation unit of the control panel 68 is operated, power is applied to the microwave oven, the high voltage transformer 76 is operated, and the applied voltage is amplified to high voltage and then supplied to the magnetron 78. The magnetron 78 applied with the high voltage oscillates the microwave into the cooking chamber 62.

In addition, according to the cooking mode, a part of the voltage is transmitted to the upper heater assembly 82. The upper heater assembly 82 that receives the voltage generates heat and transfers heat to the cooking chamber 62.

Then, power is applied to the drive motor 96 installed on the bottom plate 60d to rotate the turntable 64. In some cooking modes, power is also applied to the lower heater assembly to provide heat to the cooking chamber 62 while generating heat.

When the convection cooking mode is selected, power is applied to the convection heater assembly installed at the rear of the back plate 60c and generates heat. As the power is applied to the convection motor 108, the convection fan 112 is driven, and convection occurs in the cooking chamber 62.

In the meantime, a cooling fan (not shown) is driven while power is applied to the fan assembly 80 provided on one side of the upper plate 60b according to various cooking modes. As the cooling fan is driven, external air flows into the upper flow passage 72 through the intake port 70. The air introduced into the upper flow passage 72 by the cooling fan 80 forms a large air flow (a, b, c) in three directions. In this case, the first and second airflows a and b are discharged through one of the discharge holes of the fan assembly 80, that is, through the discharge hole on the right side of the drawing in FIG. 4, and the third airflow c is The discharge holes of the fan assembly 80 are discharged through the discharge holes on the left side of the drawing in FIG. 4.

As shown in FIG. 4, the first airflow a allows a part of the air introduced through the intake port 70 to cool electric components such as a high pressure transformer 76 and a magnetron 78 that generate heat. will be. Part of the air flow (a ') of the first air flow (a) to cool the electrical component is through the air vent 90 formed in the flange portion 60e of the cavity 60 through the air duct 88 It flows into the inside of the cooking chamber 62. The airflow a 'introduced into the cooking chamber 62 absorbs moisture from the cooking chamber 62 and is formed along the air vent 90' formed at the other flange portion 60e of the cavity 60. 2 flows into 86.

Meanwhile, the remaining airflow a '' of the airflow of the first airflow a flows into the first flow path 84. The air flow a '' flowing into the first flow path 84 flows into the lower flow path 92 under the cavity 60.

The airflow a 'flowing into the second flow path 86 is guided to the lower flow path 92 provided below the cavity 60, and the airflow a flows along the first flow path 84. ''), The driving motor 96 and the lower heater assembly provided on the lower passage 92 are cooled. The airflow (a) cooling the driving motor 96 and the lower heater assembly is discharged to the outside of the microwave oven through an exhaust port 94 provided at the lower end of the front plate 60a.

Next, as shown in FIG. 5, the second airflow b is introduced through the intake port 70 by the fan assembly 80, and flows along the upper flow path 72. It flows to the convection motor chamber 104 through the inlet 116 installed in the plate (60c). The second airflow b flowed into the convection motor chamber 104 cools the convection motor 108 and flows to the lower flow path 92 through the outlet 118.

The second airflow b flowing into the lower passage 92 cools the driving motor 96 and the lower heater assembly installed on the lower passage 92. While cooling the driving motor 96 and the lower heater assembly, the second airflow b flowing along the lower flow path 92 is discharged to the outside of the microwave oven through the exhaust port 94.

Next, as shown in FIG. 6, the third airflow c flows through the intake port 70 to cool the upper heater assembly 82 provided at the upper portion of the cavity 60. The third airflow (c) cooling the upper heater assembly 82 flows along the upper passage 72 to the second passage 86. The third airflow (c) guided to the second flow passage 86 flows along the lower flow passage 92.

The third airflow c flowing into the lower passage 92 cools the driving motor 96 and the lower heater assembly installed on the lower passage 92. The third airflow c flowing along the lower flow path 92 while cooling the driving motor 96 and the lower heater assembly is discharged to the outside of the microwave oven through the exhaust port 94.

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

In the airflow structure of the microwave oven according to the present invention as described in detail above, the following effects can be expected.

That is, since all the airflow required for the microwave oven is formed by one fan assembly, the number of parts is reduced, so that the microwave oven can be manufactured at low cost.

In addition, since only one fan assembly needs to be assembled, the assembly structure is simple, thereby improving productivity and increasing design freedom for arranging parts of a microwave oven.

And, since the number of parts is reduced, there is an effect that the defective rate of the microwave oven is reduced.

Claims (7)

In the microwave oven is formed between the cavity provided with a cooking chamber therein and the outer case surrounding the cavity constituting the exterior, A fan assembly positioned between the cavity and the outer case to provide a driving force for forming an airflow through the inside of the microwave oven; A first airflow discharged from the fan assembly and cooling the electrical component provided between the upper surface of the cavity and the outer case; A second air flow provided on the back surface of the back plate which is discharged from the fan assembly and forms the rear surface of the cavity and cools the convection motor assembly that forms convection in the cooking chamber; A third air flow discharged from the fan assembly and provided on an upper surface of the cavity to cool the upper heater assembly to supply heat to the cooking chamber; The first air flow and the second air flow is discharged through any one of the two discharge ports provided in the fan assembly, the third air flow is discharged through the other one of the two discharge holes provided in the fan assembly The airflow structure of the microwave oven. The method of claim 1, The fan assembly is an air flow structure of the microwave oven, characterized in that installed between the outer case and the front end of the upper plate forming the upper surface of the cavity. The method of claim 2, An air inlet is formed at a position corresponding to the fan assembly on the front plate forming the front surface of the cavity, and an exhaust port for discharging air to the outside of the microwave oven is formed at the lower end of the front plate. rescue. The method according to any one of claims 1 to 3, An upper flow path is formed between the upper surface of the cavity and the inner surface of the outer case, and first and second flow paths are formed between both side surfaces of the cavity and the inner surface of the outer case, respectively, and the lower surface of the cavity and the lower surface of the microwave oven are formed. The air flow structure of the microwave oven, characterized in that the lower flow path is formed between the base. The method of claim 4, wherein The first airflow flows from the upper flow passage to the lower flow passage through the first flow passage, and a part of the airflow is supplied into the cooking chamber to remove water vapor in the cooking chamber and is transferred to the lower flow passage through the second flow passage to exhaust. Air flow structure of the microwave oven, characterized in that discharged to the outside through. The method of claim 5, The second air flow is cooled in the convection motor while passing through the interior of the convection motor chamber in the upper flow passage is delivered to the lower flow path is characterized in that the air flow structure of the microwave oven characterized in that discharged to the outside through the exhaust port. The method of claim 6, The third airflow cools the upper heater assembly between the cavity and the outer case while flowing the upper flow passage, and flows into the lower flow passage along the second flow passage and is discharged to the outside through the exhaust port. Airflow structure.

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