JP2012009204A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker which can prevent deterioration of cooling efficiency while preventing degradation of designability.SOLUTION: Air channels for cooling heating coils are arranged substantially horizontally on both sides of a roaster. An intake duct 12 constituted by a rectangular pipe which forms an intake port 3 having one end opened to the rear side of a top plate is arranged substantially vertically on the rear side of a main body. An outlet of a cooling fan 11 communicates with one end of the air channel, and an inlet of the cooling fan 11 communicates with the other end of the intake duct 12. Among four side walls F, M, B and M constituting the intake duct 12 (rectangular pipe), an upper portion of the side wall B located on the side opposite to the air channel is cut away by a predetermined length H so as to form a rectangular opening. The intake duct 12 is constituted by fitting, at a predetermined position in a longitudinal direction, two pairs of side walls having a substantially U-shaped cross section perpendicular to the longitudinal direction. The fitting portion is configured to have a thickness B1.

Description

  The present invention relates to a heating cooker, and more particularly to improvement of the structure of an intake section.

In the conventional cooking device, an exhaust port is provided in the vicinity of the intake port because of the necessity of securing an installation space for the heater body and a cooking space. Further, the oil smoke generated in the roaster is discharged by natural convection because the air pressure in the roaster cabinet is slightly higher than the air pressure outside the main body. Therefore, the momentum of the oil smoke from the exhaust port is weak. On the other hand, a suction fan is provided in the air passage communicating with the intake port, and the outside air is forcibly aspirated. As a result, some of the high-temperature exhaust from the roaster enters the intake port together with the air outside the heater body, reducing the cooling effect in the heater body, and oil smoke sticking to each part in the body As a result, there is a problem that the performance is deteriorated or the oil smoke is diffused in the room.
Therefore, as a conventional example to solve this problem, an exhaust fan is installed in the air passage leading from the inside of the roaster cabinet to the outside, and the oil smoke from the roaster is forced to exhaust out of the main body, so that the oil smoke wraps around the intake port. Is known (for example, see Patent Document 1).
Also, in order to prevent a part of the exhaust from the roaster from entering the intake port due to a short circuit inside the intake / exhaust cover, the intake side edge of the intake duct that forms the intake port is A device that blocks the wraparound by contacting the plate portion of the cover is known (for example, see Patent Document 2).

JP 2001-208359 A JP 2001-336760 A

In the conventional cooking device described in Patent Document 1 and Patent Document 2, the cross-sectional shape of the intake duct provided at the rear of the main body and having a substantially rectangular intake port at one end is substantially rectangular. As shown, the right intake duct 71R and the right fan case 72R are integrated, and the left intake duct 71L and the left fan case 72L are integrated to sandwich the fan motor 73. Further, the sirocco fan 72c is inserted from the left direction. After assembly, it is configured by screwing with a plurality of screws.
The intake duct 71 and the cooling fan 72 are integrally formed, and the side wall of the intake duct 71 opposite to the air passage forms at least a part of the rear part of the fan case of the cooling fan 72.
However, of the three side walls F (front wall), M (intermediate wall), and B (back wall) constituting the U-shape of the left intake duct 71L and the right intake duct 71R, the two front surfaces corresponding to the D-shape Since the wall F and the back wall B are open at one end and are not supported, and are composed of a plate surface that is made of resin and is long in the vertical direction, the strength is low. Regarding the direction of warping, the distance between the resins constituting the side surface is closer to the inner side than the outer side of the side wall at the corner of the side wall, and therefore the intermolecular attractive force of the resin is stronger, so that the inner side as shown in FIG. It is easy to warp. Moreover, the part above the side wall is more likely to fall down due to gravity. Therefore, as shown in FIG. 14, the horizontal cross section above the duct has a tendency to warp to the inside of the U-shape before fitting.
Further, warpage increases as the length of the side wall in the vertical direction increases due to the influence of gravity. In FIG. 14, the front wall F is less likely to warp because the distance from the upper surface of the intake port to the bending point FP is short (because there are few flat portions). On the contrary, the back wall B is likely to be warped inward because the distance from the upper surface of the intake port to the bending point BP is long (because the flat portion is long). Thus, when the side wall B warps inward, there is a problem that the intake area is reduced and the cooling efficiency is lowered.
Further, the warp of the left intake duct 71L and the warp of the right intake duct 71R hardly coincide with each other. Therefore, when the left intake duct 71L and the right intake duct 71R are fitted, there is a problem that this warpage promotes the complexity of the fitting work.
In addition, although the intake port is covered by the intake / exhaust cover, when the intake / exhaust cover is removed, it is visible to the cook who is cooking the cooking device. There was also a problem.

  The present invention has been made to solve such problems, and a main object of the present invention is to provide a cooking device that prevents a decrease in design efficiency and a decrease in cooling efficiency. It is said.

  A cooking device according to the present invention includes a top plate and a main body provided below the top plate, and the main body has a heating coil for heating an object to be heated placed on the top plate, and a rear portion. A square pipe that is provided vertically and has an air inlet opening at one end that opens to the rear of the top plate, and one end that communicates with the other end of the square pipe, and cooling the heating coil by sucking air from the air inlet A cooling fan that blows air and an air passage that is arranged substantially horizontally and through which the cooling air blown from the cooling fan passes, and of the four side walls constituting the rectangular tube, the side wall opposite to the air passage Constitutes at least a part of the rear part of the fan case for accommodating the cooling fan, and is cut out from the upper part of the side wall.

  According to the present invention, since the upper part of the side wall opposite to the air passage is cut out of the four side walls constituting the rectangular pipe, the back wall of the four side walls constituting the intake duct Since the distance from the upper surface to the bending point is shortened (because the flat surface portion is short), it is difficult to warp inward, and the reduction of the intake area is suppressed, so that the cooling efficiency can be prevented from being lowered. In addition, since the upper portion of the side wall opposite to the air passage is cut out by a predetermined length, even if the intake / exhaust cover is removed, the warp of the intake port is not visible to the cooker, thereby improving the design and enabling.

It is a perspective view which partially decomposes and shows the whole induction heating cooking appliance. It is a perspective view which shows the whole main-body part in the state which removed the top plate part of the induction heating cooking appliance. It is a top view of the whole main-body part. It is a perspective view of the state which removed main components, such as an up-and-down partition plate. It is the VV line longitudinal cross-sectional view of FIG. It is the VI-VI line longitudinal cross-sectional view of FIG. It is a principal part perspective view which fractures | ruptures and shows a part case and a part of cooling duct. It is a perspective view which shows the structure of the inlet port and suction fan of the induction heating cooking appliance in Embodiment 1 of this invention. It is a disassembled assembly perspective view of the inlet port and suction fan of the induction heating cooking appliance in Embodiment 1 of this invention. FIG. 4 is a plan view of the intake duct 9 configured by fitting the right intake duct 9a and the left intake duct 9b of FIG. 3. It is a perspective view which shows another structure of the inlet port and suction fan of the induction heating cooking appliance in Embodiment 1 of this invention. It is a perspective view which shows another structure of the inlet port and suction fan of the induction heating cooking appliance in Embodiment 1 of this invention. It is a disassembled assembly perspective view of an air inlet and a suction fan of a conventional induction heating cooker. It is explanatory drawing which shows the mode of the curvature which generate | occur | produces in the inlet port of the conventional induction heating cooking appliance.

Embodiment 1 FIG.
Here, a three-mouth induction heating cooker having three heating ports will be described as an example.
FIGS. 1-14 shows the induction heating cooking appliance which concerns on Embodiment 1 of this invention, Comprising: The example of the built-in (built-in) type induction heating cooking appliance is shown.
FIG. 1 is a partially exploded perspective view showing the entire induction heating cooker.
FIG. 2 is a perspective view showing the entire main body with the top plate of the induction heating cooker removed.
FIG. 3 is a plan view of the entire main body.
FIG. 4 is a perspective view of a state where main components such as the upper and lower partition plates are removed.
FIG. 5 is a vertical cross-sectional view taken along line VV in FIG.
6 is a longitudinal sectional view taken along line VI-VI in FIG.
FIG. 7 is a perspective view of the main part of the part case and a part of the cooling duct broken away.
FIG. 8 is a perspective view showing the configuration of the air inlet and the suction fan of the induction heating cooker in Embodiment 1 of the present invention. FIG. 8A is a perspective view of the air inlet and the cooling fan as seen from the front upper right, and FIG. 8B is a perspective view of the air from the upper left as viewed from the rear.
FIG. 9 is an exploded perspective view of the intake port and the suction fan of the induction heating cooker according to the first embodiment of the present invention.
FIG. 10 is a plan view of the intake duct 9 formed by fitting the right intake duct 9a and the left intake duct 9b of FIG.
FIG. 11 is a perspective view showing another configuration of the air inlet and the suction fan of the induction heating cooker according to the first embodiment of the present invention.
FIG. 12 is a perspective view showing still another configuration of the air inlet and the suction fan of the induction heating cooker according to Embodiment 1 of the present invention.
FIG. 13 is an exploded perspective view of an intake port and a suction fan of a conventional induction heating cooker.
FIG. 14 is an explanatory view showing the state of warpage occurring at the air inlet of a conventional induction heating cooker.

As shown in FIG. 1, the induction heating cooker 100 is mounted on the main body 10 and the main body 10, and is comprised from the top plate 20 containing a heat resistant ceramic. On the front surface of the main body 10 (on the lower side in FIGS. 1 and 2), there is provided an operation unit 1 for performing setting of heating power, operation of various cooking start commands, and the like, as shown in FIG. The operation unit 2 is also provided on the front side of the surroundings (in FIG. 3, the front side is the lower side of the page). As shown in FIGS. 1 and 2, the upper frame 30 at the rear of the main body 10 is provided with one intake port 3 for intake of air from the outside of the main body 10. An exhaust port 5 for exhausting the exhaust gas from the roaster 4 and an exhaust port 6 for cooling the heating coil and the like are provided between the exhaust port 5 and the left and right intake ports 3. The intake port 3 and the exhaust ports 5 and 6 are covered with an intake / exhaust cover 40. As shown in FIG. 2, heating coils 7 </ b> L and 7 </ b> R are provided in the middle part of the main body 10 (the middle part in the vertical direction and located below the top plate 20), as shown in FIG. 2. A radiant heater 7 </ b> C is provided substantially in the center and rearward in the left-right direction.
On the surface of the top plate 20, marks 7LM, 7RM, and 7CM indicating the positions of the left and right heating coils 7L and 7R and the radiant heater 7C are printed. In addition, a display unit 21 is provided in front of the surface of the top plate 20.

  Below the middle part of the main body 10, a roaster 4 is arranged at the approximate center in the left-right direction, and is provided so as to be freely drawn out, so that cooking of grilled dishes such as fish is possible. Further, in the empty spaces on both sides of the roaster 4, as shown in FIG. 4, an air passage 8 is provided substantially horizontally from the rear to the front, as shown in FIG. 7. The control board 9 having many electronic components (for example, a microcomputer, an inverter circuit, a temperature detection sensor, etc.) for controlling the heating coil 7 and the radiant heater 7C is housed in the cooling air flowing in the air passage 8 Thus, the heat generated from the control board 9 is efficiently cooled. In addition, among the components mounted on the control board 9, the cooling efficiency is further enhanced by attaching heat radiation fins to components that generate a large amount of heat, such as IGBTs for inverter circuits. Further, one end of the rear side of the air passage 8 communicates with the air outlet of the cooling fan 11. In addition, an intake duct 12 formed of a square pipe is provided substantially vertically at the rear part of the main body 10, and as shown in FIG. 8, the intake port 3 opens to the rear of the top plate 20 at one end of the intake duct 12. The other end communicates with the suction port of the cooling fan 11. Further, the front of the air passage 8 is closed, and a hole is formed in the upper part so that the air flow is increased. A cooling duct 81 having a large number of ejection holes 82 formed on the top surface is provided between the upper hole of the air passage 8 and the heating coil 7.

Next, the flow of cooling air will be described. 2, 5, and 7 and the dashed-dotted arrow in FIG. 3 indicate the flow of cooling air.
When the cooling fan 11 rotates, relatively cool air outside the main body 10 is drawn down from the left and right intake ports 3 by the suction force of the cooling fan 11 and descends to become cooling air, which sequentially passes through the intake duct 12 and the cooling fan 11. After passing, it enters the air passage 8. Here, the cooling air is bent in the horizontal direction and advances forward. After the cooling air advances forward, the control board 9 upstream of the air passage 8 is cooled, and then the direction is changed from directly below the left and right heating coils 7L and 7R to the upper side. Thereafter, the cooling air rises, passes through the hole in the upper part of the air passage 8 and enters the cooling duct 81, and is ejected from a large number of ejection holes formed in the top surface of the cooling duct 81, and the left and right heating coils 7L, The left and right heating coils 7L and 7R are efficiently cooled by hitting 7Rb almost equally. The cooling air that has cooled the left and right heating coils 7L and 7R then gathers from the front to the rear while gathering almost to the left and right, and after cooling the radiant heater 7C, the two exhaust ports adjacent to the exhaust port 5 of the roaster 4 6 is discharged to the outside of the main body 10.
For reference, the flow of the roaster 4 and its exhaust flow are shown. As shown in FIG. 6, the oil smoke generated in the roaster 4 is drawn into the flow of air in the housing forcedly exhausted by the fan provided at the rear, and from the exhaust port 5 through the exhaust duct 42 from the rear exhaust port 41. It is discharged outside.

The intake duct 12 and the cooling fan 11 are integrally formed, and the side wall B on the opposite side of the air duct 8 of the intake duct 12 constitutes at least a part of the rear portion of the fan case of the cooling fan 11. 9, the right intake duct 12L and the right fan case 11L are integrated, and the left intake duct 12L and the left fan case 11L are integrated to sandwich the fan motor 111, and further to the left After assembling the sirocco fan 11c, it is configured by screwing with a plurality of screws. In this case, the fitting portion of the intake duct 12 has a thickness. Thereby, the intensity | strength of the fitted side wall can be increased.
FIG. 10 is a plan view of the intake duct 12 configured as described above. FIG. 10A shows the intake duct 9 itself, and FIG. In FIG. 10B, reference numeral 41 denotes a case-side plate of the main body 10.

As shown in FIGS. 8 to 10, the upper portion of the back wall B on the opposite side of the air passage among the four side walls F, M, B, and M of the intake duct 12 formed of a rectangular pipe is set to a predetermined length H. Only cut out. The shape of the opening K formed by this notch is a substantially rectangular shape that is substantially symmetric with respect to the central axis of the side wall in the short direction. Thereby, since the plane part of the back wall B decreases and the curvature of the back wall B can be suppressed, the reduction | decrease in an intake area can be suppressed and, as a result, the fall of cooling efficiency can be suppressed.
Further, the fitting portions of the rear wall B of the left intake duct 12L and the right intake duct 12R are directed downward from the intake port 3, and even if warpage occurs due to variations during molding, it is not visible to the user or Since the position is difficult to see, it is possible to prevent the deterioration of the design.

In the above example, the shape of the opening formed by cutting out the upper part of the back wall B opposite to the air passage by a predetermined length H is substantially left and right with respect to the central axis in the short direction of the side wall. Although it is a symmetrical, substantially rectangular shape, it is not necessary to be limited to this. For example, as shown in FIG. 11, it may be substantially V-shaped substantially symmetrical with respect to the center axis in the short direction of the back wall B, or may be in the center axis in the short direction of the back wall B as shown in FIG. On the other hand, it may be a substantially U-shape that is substantially symmetrical. In this case, since the uppermost part of the back wall B is continuously connected to the uppermost part of the adjacent side wall, in addition to the above effects, the shape of the opening is stronger than the substantially rectangular shape.
Further, as shown in FIG. 2, the upper end portion of the back wall B of the intake duct 12 has a thickness B1. Thereby, the intensity | strength of the back wall B increases.
Further, as shown in FIGS. 11 and 12, reinforcing ribs 51 perpendicular to the longitudinal direction are provided on the outer surface of the back wall B. Thereby, the intensity | strength of the back wall B increases.
Moreover, in said example, although the induction heating cooking appliance was demonstrated, it is not necessary to restrict to this and it can apply also to a heating cooking appliance in general.

  B side wall (back wall), B1 thickness, F side wall (front wall), K opening (by notch), M side wall (intermediate wall), BP bending point, 1 operation part, 2 operation part, 3 intake port, 4 Roaster, 5 Exhaust port (for roaster), 6 Exhaust port (for heating coil, etc.), 7 Heating coil, 7L Left heating coil, 7R, Right heating coil, 7C Radiant heater, 8 Air path, 9 Control board, 10 Main body, 11 Cooling Fan, 11C Sirocco Fan, 11L Left Fan Case, 11R Right Fan Case, 12 Intake Duct, 12L Left Intake Duct, 12R Right Intake Duct, 20 Top Plate, 21 Display Unit, 30 Upper Frame, 40 Intake / Exhaust Cover, 41 Exhaust port, 42 Exhaust duct, 51 Rib, 71 Intake duct, 71L Left intake duct, 71R Right intake duct, 72 Fan, 72 Sirocco fan, 72L left fan case, 72R right fan case 73 fan motor 81 cooling duct 82 injection holes, 111 fan motor, 100 an induction heating cooker.

Claims (8)

A top plate and a main body provided below the top plate,
The main body is a heating coil for heating an object to be heated placed on the top plate,
A square pipe provided substantially vertically at the rear, and formed with an air inlet opening at one end behind the top plate;
One end communicates with the other end of the rectangular tube, and a cooling fan that blows out cooling air for sucking air from the intake port and cooling the heating coil,
An air passage through which the cooling air blown from the cooling fan passes, and of the four side walls constituting the rectangular tube, the side wall opposite to the air passage accommodates the cooling fan. A heating cooker comprising at least a part of a rear portion of a fan casing and having an upper portion of the side wall cut away.   The rectangular tube is formed by fitting two sets of side walls having a substantially U-shaped cross section perpendicular to the longitudinal direction at a predetermined position in the longitudinal direction, and the fitting portion has a thickness. The cooking device according to claim 1, wherein the cooking device is a cooking device.   The shape of the opening formed by cutting out the upper part of the side wall opposite to the air passage of the rectangular pipe is a substantially rectangular shape that is substantially symmetrical with respect to the central axis in the short direction of the side wall. The heating cooker according to claim 1 or 2.   The shape of the opening formed by cutting out the upper part of the side wall on the side opposite to the air passage is substantially V-shaped substantially symmetric with respect to the central axis in the lateral direction of the side wall. The cooking device according to claim 1 or 2.   The shape of the opening formed by cutting out the upper part of the side wall opposite to the air passage is substantially U-shaped substantially symmetrical with respect to the central axis in the short direction of the side wall. The cooking device according to claim 1 or 2.   The cooking device according to claim 4 or 5, wherein the uppermost portion of the side wall of the rectangular pipe opposite to the air passage is continuously connected to the uppermost portion of the adjacent side wall.   The cooking device according to any one of claims 1 to 6, wherein a thickness is given to an upper end portion of a side wall of the rectangular pipe opposite to the air passage.   The cooking device according to any one of claims 1 to 7, wherein an outer surface of the side wall of the rectangular pipe opposite to the air passage is provided with a reinforcing rib perpendicular to the longitudinal direction.

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