Cooking device

Abstract

To provide a heating cooker capable of cooling both an inverter component and a noise countermeasure component.SOLUTION: The cooling device includes an inverter 21, a first fan 22 for cooling the inverter 21, a ground wire 24 and a signal wire 25 extending from the inverter 21, and a ferrite core 23 through which the ground wire 24 passes, and the ferrite core 23 is disposed on a flow passage R of wind generated by the first fan 22 and downstream of the inverter 21. The cooking device includes a discharge port 11b for discharging the wind generated by the first fan 22 to the outside of the cooking device, and the ferrite core 23 is disposed in a projected plane in the front-rear direction of the discharge port 11b.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a cooking device. [Background technology]

[0002] Patent document 1 describes a configuration that includes a power supply unit including an inverter unit, a common mode coil as a noise suppression component arranged near the inverter unit, and a cooling fan, and that cools the common mode coil when the cooling fan cools the power supply unit and magnetron. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-306480 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration described in Patent Document 1, windage loss occurs due to the noise suppression components arranged between the cooling fan and the power supply unit (inverter unit), which poses a problem of not being able to sufficiently cool the inverter unit, which can become hotter than the noise suppression components.

[0005] The present invention is intended to solve the above-mentioned problems of the conventional art, and has an object to provide a cooking device that can simultaneously cool inverter components and noise suppression components. [Means for solving the problem]

[0006] The present invention is characterized in that it comprises an inverter, a first fan that cools the inverter, at least two wires extending from the inverter, and a noise removal unit through which a predetermined wire among the wires passes, and the noise removal unit is arranged on a flow path of air created by the first fan and downstream of the inverter. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a cooking device that can simultaneously cool inverter components and noise suppression components. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an external perspective view of a cooking device according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view showing the cooking device of the present embodiment with the door open. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 2 is a bottom view of the cooking device of the present embodiment. [Figure 5] 1 is a perspective view of the cooking device of the present embodiment when viewed from the bottom side. FIG. [Figure 6] FIG. 2 is a perspective view showing the periphery of a magnetron of the cooking device of the present embodiment. [Figure 7] FIG. 2 is a perspective view showing an inverter unit. [Figure 8] FIG. 2 is a plan view showing an inverter unit. [Figure 9] 10 is a graph showing the relationship between frequency and noise level when a ferrite core is attached to an earth wire. [Figure 10] 10 is a graph showing the relationship between frequency and noise level when a ferrite core is attached to a signal line. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiment, and various modifications and application examples within the technical concept of the present invention are also included within its scope. FIG. 1 is an external perspective view of the cooking device of this embodiment, and FIG. 2 is a perspective view showing the cooking device of this embodiment with the door open. As shown in Fig. 1, the cooking device 100 of the first embodiment includes a housing 10 and a door 1 for opening and closing the front of the housing 10. A handle 2 is provided on the top of the door 1. An operation panel 3 is provided on the bottom of the door 1.

[0010] The housing 10 is a cabinet that forms the outer shell of the cooking appliance 100. The housing 10 is made of sheet metal and includes a top plate 10a facing upward, a left plate 10b facing left, a right plate 10c facing right, a back plate 10d facing rearward (see FIG. 3), and a bottom plate 10e facing downward (see FIG. 3). The left plate 10b is formed with a discharge port 11a (second discharge port). The discharge port 11a is formed near the front of the upper end of the left plate 10b. The position of the discharge port 11a shown in FIG. 1 is an example and can be changed as appropriate.

[0011] As shown in FIG. 2, the housing 10 includes a heating chamber 4 for heating food. A rectangular opening 4s is formed in the front of the housing 10, and the opening 4s is opened and closed by a door 1. The heating chamber 4 is surrounded by a top plate 4a that forms the upper wall of the interior, side plates 4b and 4c that form the left and right side wall surfaces, a rear plate 4d (see FIG. 3) that forms the inner side wall surface in the front-to-rear direction, and a bottom plate 4e that forms the bottom wall surface. The heating chamber 4 is made of sheet metal parts and is located inside the housing 10 (cabinet). Note that FIG. 2 shows a state in which a plate member provided in the center of the bottom plate 4e has been removed.

[0012] An antenna chamber 5 is provided below the bottom plate 4e, and a rotating antenna 6 is housed in the antenna chamber 5. The rotating antenna 6 is rotated by an antenna motor 31 (see FIG. 4) via a shaft (not shown).

[0013] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 3, a machine chamber M is formed between the bottom plate 4e of the heating chamber 4 and the bottom plate 10e of the housing 10. In this machine chamber M, an inverter unit 20, microwave generating means, etc. are provided.

[0014] The inverter unit 20 includes an inverter 21, a first fan 22 (first fan), a ferrite core 23 (noise removal section, see Figure 4), an earth wire 24 (one of the wiring, see Figure 4), a signal wire 25 (the other wiring, see Figure 4), and an inverter case 26 that houses these (the inverter 21, the first fan 22, the earth wire 24, and the signal wire 25).

[0015] The inverter 21 is configured by mounting components including a transformer, a choke coil, a capacitor, a heat sink, etc. on a printed circuit board.

[0016] A first fan 22 is provided in front of the inverter 21. This first fan 22 cools heat-generating components provided in the inverter 21. Furthermore, a control board 14 is provided in front of the first fan 22. This control board 14 is configured by mounting various components on a rectangular board that is long in the left-right direction.

[0017] Fig. 4 is a bottom view of the cooking device of this embodiment, and Fig. 5 is a perspective view of the cooking device of this embodiment when viewed from the bottom. Note that Figs. 4 and 5 show the cooking device with the bottom plate 10e of the housing 10 removed. In Fig. 4, the flow of cooling air is indicated by outline arrows. As shown in FIGS. 4 and 5 , the inverter unit 20 is located toward the rear of the right end of the housing 10. A first fan 22 is provided in front of the inverter 21. A ferrite core 23 is provided behind the inverter 21. The first fan 22 and the ferrite core 23 are fixed to an inverter case 26. The inverter 21 is housed in the inverter case 26, thereby forming a flow path R within the inverter case 26 through which air generated by the first fan 22 flows. The flow path R includes various components within the inverter case 26, such as a printed circuit board, a transformer, a choke coil, and a capacitor, as well as the entire interior of the inverter case 26. The first fan 22 sends air into the inverter case 26, thereby cooling the entire inverter 21. The flow path R also extends to a position where the ferrite core 23 is located. The ferrite core 23 is located downstream of the inverter 21 on the flow path R.

[0018] Furthermore, a ground wire 24 (one of the wires) and a signal wire 25 (the other of the wires) are connected to the inverter 21. The ground wire 24 extends toward the rear ferrite core 23 (see FIG. 4). The signal wire 25 is made up of three lead wires and extends substantially in the left-right direction. Unlike the ground wire 24, this signal wire 25 is a wire through which an electric signal flows. Note that in FIGS. 4 and 5, the case (cover) provided on the bottom side of the inverter case 26 that covers the inverter 21 and the like is not shown.

[0019] In addition, a branching section 27 that branches the air (cooling air) from the first fan 22 is provided behind the inverter 21. This branching section 27 is plate-shaped and attached to the inverter case 26. As a result, the air from the first fan 22 branches into air that cools the ferrite core 23 and air that cools the magnetron 32 side.

[0020] An outlet 11b (first outlet) is formed in the back plate 10d of the housing 10 at a position facing the ferrite core 23 (see FIG. 5). As a result, the air that has cooled the ferrite core 23 is discharged to the outside of the housing 10 (outside the cooking appliance 100) through the outlet 11b. The outlet 11b is configured by forming a plurality of elongated holes aligned in the vertical and horizontal directions in the back plate 10d. The entire ferrite core 23 is disposed within the projection plane of the outlet 11b in the front-to-rear direction. Note that a configuration in which a portion of the ferrite core 23 is disposed within the projection plane of the outlet 11b in the front-to-rear direction may also be adopted.

[0021] Furthermore, in the housing 10, a branch flow path 28 is formed through which the air branched by the branch portion 27 passes (see FIG. 4). This branch flow path 28 is formed along the back plate 10d. Furthermore, a second fan 34 is provided at the end (downstream) of the branch flow path 28. The rotation axis of this second fan 34 faces approximately in the front-to-rear direction, and it is located at the corner between the left side plate 10b and the back plate 10d.

[0022] In addition, the branch portion 27 is disposed so as to be inclined from rear to front in the front-rear direction toward the ferrite core 23. This makes it difficult for the wind that has cooled the ferrite core 23 to flow toward the branch flow path 28, and the cool air that has cooled the ferrite core 23 can be effectively discharged to the outside of the housing 10.

[0023] The magnetron 32 is located downstream (downwind) of the second fan 34. A duct 35 is provided downstream (downwind) of the magnetron 32 to discharge the air that has cooled the magnetron 32.

[0024] The second fan 34 is located between the magnetron 32 and the back panel 10d. The rear side of the second fan 34 in the front-to-rear direction is the intake side, and the front side is the exhaust side. The back panel 10d is formed with an air intake port 12a (see FIG. 5) at a position opposite the second fan 34, which draws in air from outside the housing 10. As the second fan 34 rotates, air drawn in through the air intake port 12a and air from the branch flow path 28 are both drawn in and exhausted toward the magnetron 32.

[0025] The machine chamber M is provided with an antenna motor 31, a magnetron 32 (a component to be cooled) that generates microwaves that are the heat source for microwave cooking, and a waveguide 33 that directs the microwaves generated by the magnetron 32 to the underside of the rotating antenna 6. The microwaves are diffused by the rotation of the rotating antenna 6 and are transmitted through the bottom plate 4e before being radiated into the heating chamber 4.

[0026] Furthermore, a branch flow path 28 is formed between the branch portion 27 and the second fan 34 so as to run along the back plate 10d. In this embodiment, a weight sensor 36 (a component to be cooled) is disposed in the branch flow path 28. Furthermore, a second fan 34 is provided on the branch flow path 28. A magnetron 32 is disposed downstream of the second fan 34. The air branched by the branch portion 27 flows through the branch flow path 28 from the right side to the left side and then flows toward the second fan 34. The air that reaches the second fan 34 is sucked in from the rear side of the second fan 34 and blown out toward the magnetron 32. Furthermore, air sucked in through the air intake 12a (see FIG. 5) is blown out from the second fan 34 toward the magnetron 32.

[0027] The weight sensor 36 is a component that is prone to relatively high temperatures, reaching a maximum of approximately 85°C. The magnetron 32 is also a component that is prone to relatively high temperatures, reaching a maximum of approximately 140°C. A ferrite core 23 (maximum temperature of approximately 60°C), which does not experience a large temperature rise, is disposed in the flow path that is discharged from the rear surface (back panel 10d).

[0028] FIG. 6 is a perspective view showing the magnetron and its surroundings of the cooking device of this embodiment. 6, branch flow path 28 is formed with guide plate 28a for guiding the airflow branched at branch portion 27 (see FIG. 4) toward the suction side of second fan 34. Although not shown, branch flow path 28 is also provided with a guide plate (flow path wall) in the region from branch portion 27 to weight sensor 36 for guiding the airflow toward second fan 34.

[0029] However, if all of the warmed air after cooling the inverter 21 is discharged from the outlet 11b (see FIG. 5) on the back panel 10d (rear face), there is a risk of damaging the wall surface of the user's home on which the cooking appliance 100 is installed. Therefore, in this embodiment, by providing the second fan 34, it is possible to draw some of the cooling air after cooling the inverter 21 into the branch flow path 28, thereby reducing the amount of cool air (air volume) discharged from the outlet 11b on the back panel 10d and reducing the impact on the wall surface of the user's home.

[0030] A gap S is formed between the left side plate 10b of the housing 10 and the side plate 4b of the heating chamber 4. Although not shown, a similar gap is also formed between the top plate 10a of the housing 10 and the upper plate 4a of the heating chamber 4. Although not shown, a similar gap is also formed between the right side plate 10c of the housing 10 and the side plate 4c of the heating chamber 4. The gap S on the left side is connected to the upper gap, which is connected to the right gap. This allows air discharged from the duct 35 toward the left side plate 10b to rise through the left gap S. Air that reaches the height of the top plate 10a through the gap S flows from left to right through the gap between the top plate 10a and the upper plate 4a. Air that reaches the right end of the top plate 10a flows from top to bottom through the gap between the right side plate 10c and the side plate 4c.

[0031] A portion of the cooling air that flows into gap S and rises is discharged from outlet 11a (second outlet) formed in the upper part of left side plate 10b. Furthermore, the air that flows from left to right through the gap between top plate 10a and upper plate 4a flows into the gap between right side plate 10c and side plate 4c, and is discharged to the outside of housing 10 (outside of cooking appliance 100) from outlets 11c, 11d (second outlet) formed in right side plate 10c. In this way, the air that has cooled magnetron 32 is cooled as it passes through gap S, etc., and then discharged from outlets 11a, 11c, 11d. This makes it possible to prevent damage to a wall surface even if the cooking appliance 100 is surrounded by such a wall surface.

[0032] The area of ​​outlet 11b (first outlet, see FIG. 5) is narrower (smaller) than the total area of ​​outlets 11a, 11c, and 11d (second outlet, see FIGS. 1 and 2). The area of ​​outlet 11b is the sum of the opening areas of the elongated holes formed in back panel 10d. The total area of ​​outlets 11a, 11c, and 11d is the sum of the opening areas of the elongated holes formed in outlet 11a (see FIG. 1), the sum of the opening areas of the elongated holes formed in outlet 11c (see FIG. 2), and the sum of the opening areas of the elongated holes formed in outlet 11d (see FIG. 2). It is more preferable that the area of ​​outlet 11b is narrower than the areas of each of outlets 11a, 11c, and 11d. The configuration of the outlets 11a, 11c, and 11d (second outlets) is not limited to this embodiment and can be modified as appropriate. For example, the second outlets may be provided only on the right side plate 10c, or only on the left side plate 10b. The second outlets may also be provided on the top plate 10a.

[0033] Fig. 7 is a perspective view showing the inverter unit, and Fig. 8 is a plan view showing the inverter unit. Figs. 7 and 8 show the inverter case 26 with the lower lid (not shown) removed. The lid covers the components inside the inverter case 26, including the printed circuit board, transformer, choke coil, capacitor, and heat sink. As shown in FIG. 7, a ground wire 24 and a signal wire 25 are connected to the inverter 21. The ground wire 24 extends rearward from the right end of the inverter board 21a. The signal wire 25 is composed of three lead wires and is connected to the inverter board 21a via a connector 25a. The number of signal wires 25 is not limited to that in this embodiment and can be changed as appropriate. The signal wire 25 extends downward in a straight line from the inverter board 21a and then bends to the side opposite the right side plate 10c.

[0034] 8, the ground wire 24 extends in a substantially straight line up to the position of the ferrite core 23 located at the rear end. At the position of the ferrite core 23, the ground wire 24 is inserted from one axial end side (the right side in the figure) to the other axial end side (the other end side in the figure) of the ferrite core 23. The tip of the ground wire 24 protrudes from the other end side of the ferrite core 23. A metal fitting 24a is attached to the tip of the ground wire 24, and is fixed to a sheet metal part such as the bottom plate 10e.

[0035] The branching portion 27 is formed integrally with the inverter case 26. The inverter case 26 also forms a branched flow path 28 immediately after being branched by the branching portion 27.

[0036] Figure 9 is a graph showing the relationship between frequency and noise level when a ferrite core is attached to the earth wire, and Figure 10 is a graph showing the relationship between frequency and noise level when a ferrite core is attached to the signal wire. Note that the horizontal axis in Figures 9 and 10 is frequency (MHz), and the vertical axis is noise level (dBμV). Lines e1 and e10 show the peak value (maximum value) obtained in the experiment, and line t1 shows the peak value (maximum value) standard. Lines e2 and e20 show the average value obtained in the experiment, and line t2 shows the average value standard. Figure 9 shows the case where the noise level is OK, and Figure 10 shows the case where the noise level is NG.

[0037] As shown in Figure 9, when ferrite core 23 was attached to earth wire 24, the noise level was within the standard for both peak value e1 and average value e2. On the other hand, as shown in Figure 10, when ferrite core 23 was attached to signal wire 25, the results showed that the peak value e10 and average value e20 both exceeded the standard in the circled area.

[0038] In this way, by providing the ferrite core 23 on the ground wire 24, it is possible to reduce noise flowing through the ground wire 24. That is, current flows through the coil formed by the ferrite core 23, and part of the current is converted into heat as magnetic loss, thereby eliminating noise. However, while providing the ferrite core 23 on the ground wire 24 can reduce noise flowing through the ground wire 24, there is a risk that the signal flowing through the signal wire 25 may also be reduced. Therefore, the ferrite core 23 needs to be positioned so as not to attenuate the signal of the signal wire 25. Therefore, a specific configuration when the ferrite core 23 is provided on the ground wire 24 will be described below.

[0039] In the first configuration, the ferrite core 23 (noise removal unit) and the signal line 25 (lead wire) are arranged at a predetermined distance apart. The predetermined distance is set appropriately depending on the product specifications, etc., but in the case of a home cooking appliance such as this embodiment, it is, for example, 1.5 cm or more. In FIG. 8, the distance between the ferrite core 23 and the signal line 25 is indicated by the length indicated by the symbol L. The distance here refers to the length of a straight line connecting the ferrite core 23 with the position (point) that is closest to the ferrite core 23 on the path from the start point (connector 25a) of the signal line 25 to the end point (point where it connects to another component).

[0040] In the second configuration, signal line 25 (lead wire inside inverter case 26) is arranged non-parallel to ground wire 24 passing through ferrite core 23. The direction of signal line 25 is the vertical direction as shown by the dashed-dotted arrow in Fig. 7, and is non-parallel to the horizontal direction in Fig. 8. On the other hand, the direction of ground wire 24 is the horizontal direction as shown by the dashed-dotted arrow in Fig. 8.

[0041] By adopting a configuration that satisfies either or both of the first and second configurations described above, it is possible to prevent the ferrite core 23 from reducing the signal flowing through the signal line 25.

[0042] As described above, the cooking device 100 of this embodiment includes the inverter 21, the first fan 22 that cools the inverter 21, the earth wire 24 and the signal wire 25 (at least two wires) that extend from the inverter 21, and the ferrite core 23 through which the earth wire 24 passes. The ferrite core 23 is disposed on the airflow path R created by the first fan 22 and downstream of the inverter 21 (see FIG. 4). This makes it possible to cool both the parts of the inverter 21 that require more cooling and the ferrite core 23 without providing a new cooling airflow path.

[0043] This embodiment also includes an outlet 11b that discharges the airflow generated by the first fan 22 to the outside of the cooking appliance 100 (housing 10). A part or all of the ferrite core 23 is arranged to overlap the front-to-rear projection plane of the outlet 11b (see FIGS. 4 and 5). This creates an airflow near the outlet 11b, allowing cooling air to be effectively directed toward the ferrite core 23.

[0044] In this embodiment, the wiring passing through the ferrite core 23 is the earth wire 24 of the inverter 21 (see FIG. 9). There are various conduction paths for inverter noise, such as conduction to other electronic devices via a signal line 25 connected to the inverter 21, or conduction from the earth wire 24 of the inverter 21. According to this embodiment, noise conducted via the earth wire 24 can be prevented from being conducted by passing the ferrite core 23 through the earth wire.

[0045] Furthermore, unlike one of the wirings, this embodiment includes a signal line 25 through which an electric signal flows, and the ferrite core 23 is disposed in a position where it does not attenuate the signal of the signal line 25 (see FIGS. 7 and 8). This improves the noise removal performance of the earth wire 24 by cooling the ferrite core 23, while preventing the noise signal attenuation effect from attenuating the signal of the signal line 25.

[0046] In this embodiment, the ferrite core 23 is spaced a predetermined distance from the signal line 25 (the other wiring) (see FIG. 8). This makes it possible to prevent the signal of the signal line 25 from being attenuated.

[0047] This embodiment also includes an inverter 21, a first fan 22, a ferrite core 23, a ground wire 24, a signal wire 25, and an inverter case 26 that houses these, and at least a portion of the signal wire 25 is arranged non-parallel to the ground wire 24 that passes through the ferrite core 23 (see FIGS. 7 and 8). This makes it possible to prevent the signal of the signal wire 25 from being attenuated.

[0048] This embodiment also includes a branching section 27 that branches the airflow after cooling the inverter 21 upstream of the ferrite core 23, a branch flow path 28 through which the airflow branched by the branching section 27 passes, and exhaust ports 11a, 11c, and 11d that discharge the airflow in the branch flow path 28 to the outside of the cooking appliance 100 (housing 10). A magnetron 32 and a weight sensor 36 (a component to be cooled) that may reach a higher temperature than the ferrite core 23 are disposed on the branch flow path 28. Of the exhaust ports 11a to 11d, only the exhaust port 11b is provided on the rear side of the cooking appliance 100 (housing 10). The area of ​​the exhaust port 11b is smaller than that of the exhaust ports 11a, 11c, and 11d (see FIGS. 1, 2, and 5). The cooking appliance 100 (microwave oven) is often installed on a wall of a user's home on the rear side of the microwave oven. If all the warm air after cooling the inverter 21 is discharged to the back side of the microwave oven, there is a risk of damaging the wall of the user's home. Therefore, by branching off some of the air and discharging it from the side (exhaust ports 11a, 11c, 11d), the amount of air discharged from the back side is reduced, and the impact on the wall of the user's home can be reduced.

[0049] In the present embodiment, a second fan 34 is provided on the branch flow path 28. This cools the ferrite core 23 exiting from the rear surface of the cooking appliance 100 (housing 10), thereby reducing the amount of cool air discharged from the outlet 11b and preventing damage to the wall surface of the user's home.

[0050] Furthermore, this embodiment is provided with an intake port 12a that draws air into the cooking appliance 100 (housing 10) at a position opposite the second fan 34, and the magnetron 32 as the component to be cooled is disposed downstream of the second fan 34. With this, unheated air can be taken in through the intake port 12a and blown onto the magnetron 32, which becomes hot, so that the magnetron 32 can be cooled effectively.

[0051] The present invention is not limited to the above-described embodiment, and includes various modifications. For example, in the above-described embodiment, an example was given in which both the first and second configurations were provided as a configuration that does not attenuate the signal of the signal line 25 when the ground wire 24 is provided on the ferrite core 23, but a configuration that includes either the first or second configuration may also be provided.

[0052] Furthermore, although the present invention has described an example of a cooking device 100 having a heating function using microwaves from the magnetron 32, the cooking device 100 may also have a heating function that generates superheated steam, infrared rays, or hot air in addition to microwaves. [Explanation of symbols]

[0053] 1 door 4 Heating chamber 4a Upper board 4b,4c side plate 4d rear plate 10. Cabinet 10a Top plate 10b Left side board 10c Right side plate 10d backboard 11b Discharge port (first discharge port) 11a, 11c, 11d outlet (second outlet) 12a Air intake 21 Inverter 21a inverter board 22 First Fan (First Fan) 23 Ferrite core (noise removal part) 24 Ground wire (prescribed wiring) 25 Signal line (other wiring) 26 Inverter case 27 Branch 28 Branch Channel 32 Magnetron (cooled part) 34 Second Fan (Second Fan) 36 Weight sensor (cooled parts) 100 Cooker M Machine room R flow path S Gap

Claims

1. An inverter; a first fan for cooling the inverter; At least two wires extending from the inverter; a noise removal unit that passes predetermined wirings among the wirings; The cooking device according to claim 1, wherein the noise removal unit is disposed downstream of the inverter in a flow path of airflow generated by the first fan.

2. a first exhaust port for exhausting the wind generated by the first fan to the outside of the cooking appliance; The cooking device according to claim 1 , wherein at least a part of the noise removal unit is disposed within a projection plane in the front-rear direction of the first outlet.

3. 3. The cooking device according to claim 2, wherein the predetermined wiring passing through the noise removal unit is a ground wire of the inverter.

4. the at least two wirings include a signal line through which an electric signal flows as another wiring different from the predetermined wiring, The cooking device according to claim 3 , wherein the noise removal unit is disposed at a position where it does not attenuate the signal on the signal line.

5. The cooking device according to claim 4, wherein the noise removal unit is spaced a predetermined distance from the signal line.

6. 5. The cooking device according to claim 4, further comprising the inverter, the first fan, the noise elimination unit, a portion of the wiring, and an inverter case that houses these, wherein at least a portion of the signal line is arranged non-parallel to the earth wire that passes through the noise elimination unit.

7. a branching unit that branches the airflow after cooling the inverter upstream of the noise removal unit; a branch flow path through which the air branched by the branching portion passes; a second exhaust port that exhausts the airflow from the branch flow path to the outside of the cooking device, a cooled component that may reach a temperature higher than that of the noise removal unit is disposed on the branch flow path; Of the first outlet and the second outlet, only the first outlet is provided on the back side of the cooking appliance, 7. The cooking device according to claim 2, wherein the first outlet has an area smaller than that of the second outlet.

8. 8. The cooking device according to claim 7, wherein a second fan is provided on the branch flow path.

9. an air intake port for drawing air into the cooking appliance at a position opposite the second fan; 9. The cooking device according to claim 8, wherein a magnetron as the component to be cooled is disposed downstream of the second fan.

Images