JP5094997B1 - Cooker - Google Patents

Abstract

An object of the present invention is to provide a cooking device that can reduce the intrusion of food and the like into an exhaust air passage while ensuring the height of the interior of the cooking chamber, and can easily exhaust air with a high contamination concentration.
A cooking chamber 17 disposed in a housing 2 and having an exhaust opening 30 formed on a part of a wall surface; an upper heating unit 24 disposed in the cooking chamber 17; and cooking as viewed from above. A cooking chamber exhaust duct 10 that is disposed at a position that does not overlap the chamber 17 and communicates the exhaust opening 30 and the outside of the housing 2, and is provided in the cooking chamber 17 so as to face the exhaust opening 30. And a shielding member 40 that forms a cooking chamber exhaust port 28 by providing a gap between the rear wall 17a provided with the opening 30 and the cooking chamber exhaust port 28 is located in the center of the cooking chamber 17 in the height direction. It is formed above.
[Selection] Figure 8

Description

  The present invention relates to a cooking device that performs cooking such as baking and steaming on an object to be heated such as cooking ingredients housed in the cooking chamber by heating the cooking chamber with a heating means.

  DESCRIPTION OF RELATED ART Conventionally, the heating cooker which heat-cooks with respect to to-be-heated objects, such as a foodstuff accommodated in the cooking chamber, by heating a cooking chamber with a heating means is known. In this type of cooking device, when cooking in the cooking chamber, smoke and odor components due to heating of the food material fill the cooking chamber, the smoke and odor components adhere to the cooking material and the cooking finish (appearance) There is a problem that the taste and taste are reduced.

Against the background of the above problems, various means for discharging the air in the cooking chamber to the outside of the cooking chamber have been proposed.
As such a cooking device, “a cooking chamber 1 for storing a cooked product 3 such as seafood placed on the grill net 2, an upper surface heating means 4 such as a sheathed heater for heating the upper surface of the cooked product 3, cooking Lower surface heating means 5 such as a sheathed heater for heating the lower surface of the object 3 from below the grill 2, an exhaust port 6 provided in the vicinity of the upper surface heating means 4 in the upper part of the cooking chamber 1, and the exhaust port 6 connected to the outside And an exhaust passage 7 communicating with the exhaust passage 6, a catalyst body 8 provided at the exhaust port 6, and a tray 9 on which the grill net 2 is placed have been proposed (see, for example, Patent Document 1).
Another heating cooker has been proposed in which an exhaust port is formed in the upper part of the rear plate portion of the cooking chamber, and an exhaust duct is connected to the exhaust port (see, for example, Patent Document 2).

JP 2007-29141 A (page 4, FIG. 1) JP 2006-329456 A (page 3, FIG. 1)

However, in the heating cooker described in Patent Document 1, since the exhaust port is provided on the upper surface of the cooking chamber and the exhaust air passage is arranged above the cooking chamber, the height of the cooking chamber is set to the height of the cooking chamber. The height dimension is added, and the height dimension of the cooking device is increased.
This type of cooking device may be used for a built-in cooking device such as a so-called IH cooking heater or a gas table that is incorporated in a kitchen counter. Generally, the cooking device incorporated in the counter of the kitchen is modularized, and its height dimension is standardized. For example, the height of the cooking device is about 230 mm, and the cooking device is assembled so as to be within a depth of about 220 mm from the upper surface of the kitchen counter. In such a cooking device with limited height dimensions, if the exhaust air channel is arranged above the cooking chamber, the height of the cooking chamber is reduced, and the appearance of relatively large fish such as salmon and pan, sponge cake It becomes impossible to cook an object to be heated having a large thickness (such as a large height). That is, the height of the object to be heated that can be cooked in the cooking chamber is greatly limited, and the cooking range and cooking ability are restricted.

In the heating cooker described in Patent Document 2, the exhaust port is provided on the side wall surface on the rear side of the cooking chamber, and the exhaust air passage is also arranged without overlapping the cooking chamber in the height direction. The exhaust structure is arranged so as not to affect the height of the product and the height of the cooking chamber.
However, in the heating cooker described in Patent Document 2, when moisture or the like contained in the object to be heated is vaporized by heating, a part of the object to be heated bursts and is scattered on the side surface of the cooking chamber. It can enter the exhaust air passage from the provided exhaust port. When scattered objects of the heated object enter the exhaust air passage, the inner surface of the exhaust air passage becomes dirty. In addition, a catalyst body for decomposing and removing pollutants contained in the exhaust gas is provided in the exhaust air passage, and if scattered matter of the heated object adheres to the catalyst body, contact between the catalyst body and the pollutants will occur. There is a possibility of reducing the purification capacity of the catalyst body by reducing the area. Further, if scattered matter of the object to be heated adheres to the catalyst body, the opening of the catalyst body is blocked to block ventilation, and pressure loss is increased to prevent exhaust ventilation, so that sufficient exhaust cannot be performed. If it becomes like this, the finish of cooking may be reduced.

  Further, in the heating cooker described in Patent Document 2, the exhaust opening opens at a relatively low position on the side wall surface on the rear side of the cooking chamber (almost the same height as the grill net on which the object to be heated is placed). Yes. For this reason, not only high-concentration smoke and pollutants that accumulate in the upper part of the cooking chamber, but also mid- and low-layer air with relatively low concentrations of smoke and odor components are exhausted. Due to the discharge of the excess air in the cooking chamber, there is a problem that the air temperature in the cooking chamber is lowered and the heating efficiency of the object to be heated is lowered.

  The present invention has been made to solve the above-described problems, and while ensuring the indoor height of the cooking chamber, it is possible to reduce the intrusion of food and the like into the exhaust air passage, and to reduce the contamination concentration. The present invention provides a cooking device that easily exhausts high air.

A heating cooker according to the present invention is disposed in a casing, a cooking chamber in which an exhaust opening is formed in a part of a wall surface, heating means disposed in the cooking chamber, and the cooking chamber as viewed from above. A cooking chamber exhaust duct that is disposed at a position that does not overlap with the exhaust opening and communicates with the outside of the housing, and is provided in the cooking chamber opposite to the exhaust opening, from the lower portion of the exhaust opening. It has an inclined surface that inclines toward the inside of the cooking chamber toward the top, and a gap is provided between the inclined surface and the wall surface provided with the exhaust opening, and a cooking chamber exhaust port is provided on one end side. And a shielding member that forms a flow path from the cooking chamber exhaust port to the exhaust opening , and the cooking chamber exhaust port is formed above the center in the height direction of the cooking chamber. It is what.

According to the present invention, since the cooking chamber exhaust duct is provided at a position that does not overlap with the cooking chamber when viewed from above, it is possible to suppress an increase in the height of the cooking device. For this reason, even when there is a restriction on the height dimension of the heating cooker, it is possible to ensure the height dimension of the cooking chamber and obtain a heating cooker capable of cooking a heated object having a large height dimension. it can.
In addition, according to the present invention, since the shielding member is provided relative to the exhaust opening provided on the wall surface of the cooking chamber and the cooking chamber exhaust port is provided above the cooking chamber, The generated scattered matter hardly flows into the cooking chamber exhaust duct, and contamination in the cooking chamber exhaust duct can be suppressed. By suppressing the contamination in the cooking chamber exhaust duct, an increase in the pressure loss of the exhaust is also suppressed, and the exhaust with a smaller exhaust air volume becomes possible.
In addition, according to the present invention, the cooking chamber exhaust port is formed above the center in the height direction of the cooking chamber, so that contaminants such as high-concentration smoke and odor components that accumulate in the upper portion of the cooking chamber, Efficient exhaust with a small exhaust air volume. For this reason, the exhaust heat of the cooking room air accompanying exhaust is suppressed, heating efficiency improves, and the heating cooker with a low environmental load can be obtained with energy saving.

1 is a perspective view of induction heating cooker 100 according to Embodiment 1. FIG. It is a perspective view of the main body 1 of the state which removed the top plate 4 and the intake / exhaust port cover 5 of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a perspective view of the main body 1 in a state where the casing upper frame 3, top plate 4, intake / exhaust port cover 5 and induction heating coil unit 11 on the front right side of the induction heating cooker according to Embodiment 1 are removed. FIG. 6 is a perspective view of the right substrate case unit 15 and is shown partially transparently. It is a perspective view which shows the cooking chamber 17 whole which concerns on Embodiment 1. FIG. It is a perspective view of the state which removed the upper board 23a and the cooking chamber door 7 of the cooking chamber 17 which concerns on Embodiment 1. FIG. It is a disassembled perspective view which shows the attachment state of the shielding member 40 of the state which removed the upper plate 23a of the cooking chamber 17, the cooking chamber door 7, the cooking stand 26, and the saucer 27 which concern on Embodiment 1. FIG. 3 is a side cross-sectional view of the cooking chamber exhaust duct 10 portion of the main body 1 according to Embodiment 1. FIG. It is a figure explaining the cooking chamber exhaust port 28 vicinity which concerns on Embodiment 1. FIG. It is an upper perspective view which shows the cooking chamber 17 whole which concerns on Embodiment 2. FIG. It is the perspective view which looked at the cooking chamber 17 whole which concerns on Embodiment 2 from the downward direction. It is a perspective view of the state which removed the upper plate 23a and the cooking chamber door 7 of the cooking chamber 17 which concerns on Embodiment 2. FIG. It is a disassembled perspective view which shows the attachment state of the shielding member 400 of the state which removed the upper board 23a of the cooking chamber 17, the cooking chamber door 7, the cooking stand 26, and the saucer 27 which concern on Embodiment 2. FIG. 6 is an exploded perspective view of a state in which a catalyst body 32 is held on a shielding member 400 according to Embodiment 2. FIG. It is side surface sectional drawing in the cooking chamber exhaust duct 10 part of the main body 1 which concerns on Embodiment 2. FIG. It is a figure explaining the cooking chamber exhaust port 280 vicinity which concerns on Embodiment 2. FIG.

Embodiment 1 FIG.
In this Embodiment 1, the case where the heating cooker of this invention is applied to the induction heating cooker incorporated and used in the counter etc. of a kitchen is demonstrated to an example. The heating cooker according to the first embodiment directly heats an object to be heated which is a food such as meat, fish, vegetables, pizza, and pasta contained in the cooking chamber by heating the cooking chamber with a heating element. Or indirectly cooking such as baking, boiling and steaming.
In the following description, there are cases where terms (for example, “front”, “back”, “up”, “down”, “left”, “right”, etc.) are used to facilitate understanding. However, this is for illustration purposes only and these terms are not intended to limit the invention. Unless otherwise specified, terms indicating these directions mean directions when the cooking device is viewed from the front side. Also, in FIG. 1 and each figure described later, the same reference numerals are the same or equivalent, and this is common throughout the entire specification. Furthermore, the form of the constituent elements appearing in the whole specification is merely an example, and is not limited to these descriptions.

[Configuration of induction heating cooker]
1 is a perspective view of induction heating cooker 100 according to Embodiment 1. FIG.
In FIG. 1, a housing upper frame 3 is detachably disposed above the housing 2 of the main body 1 of the induction heating cooker 100. An intake / exhaust port cover 5 is disposed on the back side of the housing upper frame 3, and a top plate 4 is disposed in the center. A cooking chamber 17 is arranged inside the housing 2.

  On the front side of the housing 2, a cooking chamber door 7 is provided in the center. The cooking chamber door 7 is openable and closable so that an object to be heated cooked in the cooking chamber 17 continuing from the cooking chamber door 7 to the back side can be taken in and out of the cooking chamber 17. Moreover, the cooking chamber door 7 can be attached to and detached from the housing 2 for maintenance such as cleaning of the cooking chamber 17 and the cooking chamber 17 itself. In addition, in this Embodiment 1, although the cooking chamber 17 is arrange | positioned in the center of the housing | casing 2, you may arrange | position near one of the side surfaces. Moreover, it is good also as a structure which does not provide the operation part 6 in the both sides of the cooking chamber door 7. FIG.

  The intake / exhaust port cover 5 is made of a punching metal or a lattice-shaped metal member having air permeability. The intake / exhaust port cover 5 is configured such that cooling air for cooling the inside of the housing 2 and the exhaust flow of the cooking chamber 17 can pass smoothly with less airflow resistance.

  The top plate 4 is provided with an operation unit 6 having visual display means such as a liquid crystal screen and a lamp. In addition, operation units 6 are provided on both sides of the cooking chamber door 7 of the housing 2. The operation unit 6 includes operation buttons, switches, and the like for accepting settings for heating operation in the induction heating cooker 100. The specific configuration of the operation unit 6 is not limited. For example, the operation unit 6 configured by a touch panel may be provided. Moreover, although the example which provides the operation part 6 in the both sides of the cooking chamber door 7 of the top plate 4 and the housing | casing 2 is shown in this Embodiment 1, you may provide the operation part 6 only in one.

  FIG. 2 is a perspective view of main body 1 in a state where top plate 4 and intake / exhaust port cover 5 of the induction heating cooker according to Embodiment 1 are removed.

  A casing exhaust port 9 is provided at the center of the rear side of the casing upper frame 3, and a casing intake port 8 is provided on each of the left and right sides. A cooling air exhaust duct 14 that is an exhaust air passage for cooling air that has cooled the inside of the housing 2 is connected to the housing exhaust port 9. The cooling air sucked from the housing air inlet 8 and passed through the housing 2 is guided by the cooling air exhaust duct 14 and discharged from the housing air outlet 9 to the outside of the main body 1. In addition, a cooking chamber exhaust duct 10 that guides the exhaust from the cooking chamber 17 is disposed in the cooling air exhaust duct 14, and the exhaust from the cooking chamber 17 is also discharged from the housing exhaust port 9 to the outside of the main body 1. The In a normal use state, the housing exhaust port 9 is covered with the intake / exhaust port cover 5 shown in FIG.

  Inside the housing 2, induction heating coil units 11 are arranged on the left and right sides of the front surface as heating means for heating an object to be heated (not shown) placed on the top plate 4. A radiant heater 13 is disposed in the center of the side. The induction heating coil unit 11 performs induction heating of an object to be heated placed thereon, and the radiant heater 13 performs cooking of the object to be heated by heat transfer of heat generated by a heating element provided therein. These heating means are mounted according to the necessity of the cooking function on the top plate 4, and can be combined as necessary. For example, all of the heating means for heating the object to be heated on the top plate 4 may be an induction heater coil unit 11 or an electric heater such as a radiant heater 13 or a so-called gas stove.

  In addition, in this Embodiment 1, although the induction heating cooker 100 which performs heat cooking also on the top plate 4 is shown as an example, the heating means for performing heat cooking on the top plate 4 is as needed. What is necessary is just to mount, and it is good also as a heating cooker which performs only the heating cooking in the cooking chamber 17. FIG. In this case, an exterior covering the outside of the cooking chamber 17 and the cooking chamber exhaust duct 10 may be provided.

  Below the induction heating coil unit 11 and the radiant heater 13, a cooking chamber storage unit 19 is partitioned by sheet metal or the like, and a cooking chamber 17 is disposed inside the cooking chamber storage unit 19. In the space in the cooking chamber 17, cooking such as baking, steaming, and cooking, steam cooking, and the like are performed.

  FIG. 3 is a perspective view of the main body 1 in a state where the casing upper frame 3, the top plate 4, the intake / exhaust port cover 5, and the induction heating coil unit 11 on the right front surface of the induction heating cooker according to the first embodiment are removed. It is. FIG. 4 is a perspective view of the right substrate case unit 15 and is shown partially transparently. In addition, the structure of the board | substrate case unit 15 provided in right and left is substantially symmetrical, and demonstrates here using the board | substrate case unit 15 provided in the right side.

  Substrate case units 15 are respectively arranged on the left and right sides of the cooking chamber storage unit 19. A substrate case unit air inlet 21 is opened in the substrate case unit 15. The substrate case unit air inlet 21 is connected to the housing air inlet 8.

  An electronic circuit board on which electronic components such as a cooling fan 18 and an inverter circuit that supplies high-frequency power to the induction heating coil unit 11 and a control circuit that controls the operation of the induction heating cooker 100 are mounted on the substrate case unit 15. 12 are accommodated. The electronic circuit board 12 also includes components that are to be cooled and generate heat, and may include a heat sink (cooling fin) to increase cooling efficiency.

  A substrate case unit exhaust port 22 is opened in the substrate case unit 15. The substrate case unit 15 is formed as an integral air path from the substrate case unit intake port 21 to the substrate case unit exhaust port 22.

  Below the induction heating coil unit 11, a substantially circular chamber 16 is disposed in plan view. The chamber 16 is formed as an air path that guides air from the cooling fan 18 provided in the substrate case unit 15 to the induction heating coil unit 11, and a plurality of air outlets 16 a are formed on the upper surface thereof. ing. The induction heating coil unit 11, the radiant heater 13, and the chamber 16 are mounted according to the necessity of the cooking function on the top plate 4, and are not mounted when the cooking function is unnecessary.

  By operating the cooling fan 18, a suction force is generated in the substrate case unit intake port 21, and air flows into the substrate case unit 15 from the substrate case unit intake port 21 through the housing intake port 8. The air flowing into the substrate case unit 15 is sucked and sent out by the cooling fan 18, cools the object to be cooled on the electronic circuit board 12 inside as cooling air, and is then exhausted from the substrate case unit exhaust port 22.

  The cooling air that has exited the substrate case unit 15 from the substrate case unit exhaust port 22 flows into the chamber 16, is blown out from the air outlet 16 a provided in the upper surface of the chamber 16, and is blown to the induction heating coil unit 11. The heating coil unit 11 is cooled. The cooling air that has cooled the induction heating coil unit 11 flows backward in the upper part of the cooking chamber storage portion 19, flows into the cooling air exhaust duct 14 from the cooling air exhaust air passage inlet 20, and the housing exhaust port 9. Then, the air is exhausted outside the housing 2. The temperature of the air exhausted from the intake / exhaust port cover 5 is a temperature at which no problem occurs even if a person touches the exhaust. By driving the cooling fan 18 to cool the inside of the housing 2 in this manner, the temperature inside the housing 2 due to cooking increases the function of each component inside the housing 2 and shortens the service life. Is avoiding.

  In the first embodiment, the housing air inlet 8 passes through the substrate case unit 15, the chamber 16, the cooling air exhaust air passage inlet 20, and the cooling air exhaust duct 14 to the housing air outlet 9. The leading air path corresponds to the in-casing cooling air path of the present invention.

[Cooking room and cooking room exhaust structure]
FIG. 5 is a perspective view showing the entire cooking chamber 17 according to the first embodiment. FIG. 6 is a perspective view of the cooking chamber 17 according to Embodiment 1 with the upper plate 23a and the cooking chamber door 7 removed. FIG. 7 is an exploded perspective view showing an attachment state of the shielding member 40 in a state where the upper plate 23a of the cooking chamber 17, the cooking chamber door 7, the cooking table 26, and the tray 27 according to Embodiment 1 are removed.

(Cooking room 17)
The cooking chamber 17 is surrounded by a rear wall 17a, a right side wall 17b, a left side wall 17c, an upper plate 23a, and a bottom plate 23b. The front side of the cooking chamber 17 is open, and the opening is covered by the cooking chamber door 7 so that it can be opened and closed.

  Connected to the rear wall 17a of the cooking chamber 17 is a cooking chamber exhaust duct 10 made of a plate-like member such as a sheet metal and having a ventilation space therein. The cooking chamber exhaust duct 10 communicates with the inside of the cooking chamber 17, and smoke generated during cooking in the cooking chamber 17 is exhausted through the cooking chamber exhaust duct 10.

  At least any of the contact portion / joint portion between the cooking chamber 17 and other members, the cooking chamber door 7, and the walls of the cooking chamber 17 (rear wall 17a, right side wall 17b, left side wall 17c, upper plate 23a, bottom plate 23b). These are provided with openings (not shown) through which air can be sucked. Intake accompanying the exhaust from the cooking chamber 17 is smoothly performed through this opening, and the exhaust is not hindered.

  An upper heating device 24 is disposed above the cooking chamber 17 and a lower heating device 25 is disposed below the interior. A cooking table 26 for placing an object to be heated is disposed below the upper heating device 24, and a tray 27 is disposed below the lower heating device 25.

The upper heating device 24 is a heating unit that heats the cooking chamber 17 from above the object to be heated by radiation or heat transfer. The lower heating device 25 is a heating unit that heats the inside of the cooking chamber 17 from below the object to be heated by radiation or heat transfer.
As the upper heating device 24 and the lower heating device 25, for example, a sheathed heater or a far-infrared heater that is a resistance heating element may be used, the top plate may be heated by a flat heater, or the top plate may be heated by an induction heating coil. A plate or a resistance heating element may be used, and the specific configuration is not limited. In the present embodiment, the upper heating device 24 and the lower heating device 25 are bent in the depth direction and the width direction so that a wide area above the cooking chamber 17 can be heated. The terminals of the upper heating device 24 and the lower heating device 25 pass through the rear wall of the cooking chamber 17 and are exposed to the outside of the cooking chamber 17.

  In the present first embodiment, the upper heating device 24 and the lower heating device 25 are used to heat the object to be heated placed on the cooking table 26 from the upper and lower directions at a time. However, the configuration of the number and arrangement of the heating devices for heating the inside of the cooking chamber 17 is not limited to this, and for example, a heating means may be provided only in the upper direction. By doing so, it is possible to heat cook the upper and lower surfaces of the object to be heated.

  The cooking table 26 is a table for placing an object to be heated, and is disposed between the upper heating device 24 and the lower heating device 25. In this Embodiment 1, the mounting surface of the to-be-heated object of the cooking table 26 has illustrated the so-called straight type grille which comprised the bar-shaped stainless steel extended in the front-back direction, for example. The material of the cooking table 26 may be other than stainless steel as long as it is a heat-resistant material and suitable for cooking, and the surface of the material is non-adhesive and antifouling. Etc. may be applied.

The tray 27 is a tray for receiving a part of the oil to be heated and the oil dropped from the heated object, and is disposed below the lower heating device 25.
The cooking table 26 and the tray 27 are pulled out of the cooking chamber 17 or accommodated in the cooking chamber 17 as the cooking chamber door 7 is opened and closed.

(Cooking room exhaust structure)
The rear wall 17a of the cooking chamber 17 has an exhaust opening 30 that allows the inside and outside of the cooking chamber 17 to communicate with each other. The exhaust opening 30 is substantially rectangular when viewed from the front.

  A shielding member 40 is attached to the rear wall 17 a of the cooking chamber 17 at a position facing the exhaust opening 30. The shielding member 40 forms a cooking chamber exhaust port 28 by providing a gap with the rear wall 17a. The cooking chamber exhaust port 28 is located above the center of the cooking chamber 17 in the height direction, and opens upward from the cooking chamber 17. The shielding member 40 includes a front portion 41a (inclined surface) that constitutes an inclined surface that is inclined so as to protrude in the inner direction (front direction) of the cooking chamber 17 from below to above, and a side end portion of the front portion 41a. A shielding wall 41 including a side portion 41b extending rearward from the rear side is provided. A shielding member 40 is relatively disposed on the front side of the exhaust opening 30, and most of the exhaust opening 30 is covered with the shielding member 40 when viewed from the front.

  A plurality of partition plates 42 extending substantially parallel to the air flow direction are provided inside the upper portion of the shielding member 40. By the partition plate 42, the cooking chamber exhaust port 28 is partitioned into a plurality of slit-shaped openings. A surface partitioned into a plurality of openings in the cooking chamber exhaust port 28 is referred to as a selective transmission surface 29. Solid matter such as debris that the heated object ruptured and scattered when the moisture contained in the heated object is vaporized in the heated object, or dust that has been carbonized by cooking, such as a slit in the selectively permeable surface 29 What cannot pass through the opening of the shape cannot enter the cooking chamber exhaust duct 10 from the cooking chamber exhaust port 28.

  In the first embodiment, the selective transmission surface 29 is configured by the slit-shaped openings partitioned by the partition plate 42. For example, the cooking chamber exhaust port 28 has a circular shape, a square shape, a hexagonal shape, etc. in plan view. The selective transmission surface 29 may be configured by partitioning into a plurality of openings. The shape of the selectively permeable surface 29 is not limited to the illustrated one, and a plurality of openings of any shape and size can be used as long as the solid material can be prevented from entering the cooking chamber exhaust duct 10 and the exhaust can pass therethrough. The part can be formed. Further, an oil smoke filter using a net or a fine slit may be attached to the cooking chamber exhaust port 28 and used as the selective transmission surface 29. In this way, oil is removed from the exhaust gas at the permselective surface 29, and the recovered oil component flows and descends along the slope of the permselective surface 29 by gravity, and is guided to the cooking chamber 17, and the cooking chamber exhaust duct 10 is removed. The load of decomposition / removal of oil in the catalyst body 32 (described later) provided inside can be reduced. In the first embodiment, the partition plate 42 is integrally attached to the shielding member 40 to form the selective transmission surface 29. However, another member constituting the selective transmission surface 29 may be attached to the shielding member 40. .

(Cooking room exhaust duct 10)
A cooking chamber exhaust duct 10 is connected to the exhaust side of the exhaust opening 30. The cooking chamber exhaust duct 10 extends substantially horizontally from the back side of the exhaust opening 30 and then extends substantially vertically, and has a three-dimensional shape that is substantially L-shaped. For convenience, a portion extending substantially horizontally in the cooking chamber exhaust duct 10 is referred to as a depth portion 10A, and a portion extending substantially vertically is referred to as a rising portion 10B.

  Further, in the depth portion 10A, the pipe having a predetermined length from the connection position with the exhaust opening 30 has a larger channel cross-sectional area than the pipe downstream, and this portion is connected. This will be referred to as part 10C. That is, the depth portion 10A and the rising portion 10B of the cooking chamber exhaust duct 10 are configured so that the air passage width is smaller than that of the connection portion 10C, and the cooking chamber exhaust duct 10 is located on the upstream side of the exhaust flow (connection portion 10C). On the other hand, the channel cross-sectional area is smaller on the downstream side (depth portion 10A, ascending portion 10B). The depth portion 10A and the ascending portion 10B are arranged within the range of the width of the connecting portion 10C when viewed from the front.

  The upper surface 10a of the depth portion 10A is inclined so as to become higher toward the back side from the connection portion with the connection portion 10C, and is connected to the vertical portion front surface 10b of the rising portion 10B. The upper surface of the rising portion 10B is open, and this opening is referred to as an upper surface opening 10c.

  On the bottom surface 10d of the cooking chamber exhaust duct 10, a nozzle 34 is provided at a position generally facing the upper surface opening 10c. In a state where the cooking chamber 17 and the cooking chamber exhaust duct 10 are housed in the housing 2, the nozzle 34 communicates with the cooling air exhaust air passage inlet 20.

  The cooling air sent out by the cooling fan 18 flows into the cooling air exhaust air passage inlet 20, and a part of the cooling air is blown out from the nozzle 34 into the cooking chamber exhaust duct 10, thereby causing an ejector effect. The air in the cooking chamber 17 can be sucked (attracted) and exhausted. The nozzle 34 according to the first embodiment is formed in a slit shape extending in the width direction of the cooking chamber exhaust duct 10. In the first embodiment, the cooling fan 18 corresponds to the blower according to the present invention.

  In addition, the rear side of the upper surface 10a of the depth portion 10A is configured to be higher, and can assist by using the rising airflow (draft) generated from the temperature rise of the air due to cooking for exhaust and attracting by the ejector ( The exhaust capacity is increased by reducing the (suction) load (increasing air flow and static pressure). By doing in this way, the air inflow amount to the nozzle 34 required for suction of the exhaust in the cooking chamber 17, that is, the capacity of the cooling fan 18 can be suppressed, and the effect of low noise and energy saving can be obtained.

  In the first embodiment, the ejector is mainly used for suction / exhaust in the cooking chamber 17, but the suction / exhaust mechanism in the cooking chamber 17 is not limited to this. For example, the nozzle 34 may not be provided, and the cooking chamber 17 may be exhausted using only the rising airflow generated by heating in the cooking chamber 17. Further, an exhaust fan may be provided separately, and the air in the cooking chamber 17 may be directly sucked by the action of the fan.

(Catalyst body 32)
A rectangular catalyst body 32 having substantially the same width as the cooking chamber exhaust port 28 is accommodated in the connection portion 10C. A catalyst heating device 33 is disposed in front of the catalyst body 32 in the connecting portion 10C. The connection terminal portion of the catalyst heating device 33 is exposed from the side of the cooking chamber exhaust duct 10.

An oxidation catalyst such as palladium or platinum is attached to the catalyst body 32.
For the catalyst heating device 33, for example, an electric heater such as a sheathed heater is used. The catalyst body 32 is heated to 300 ° C. or higher by the catalyst heating device 33, thereby increasing the catalytic activity of the catalyst body 32, and oxidizing and purifying indoor air pollutants such as oil smoke and odor components contained in the exhaust gas. ing.

  The catalyst body 32 is fitted to the connection portion 10C and has substantially the same width as the connection portion 10C. That is, the width of the catalyst body 32 is larger than the air passage width of the depth portion 10A and the rising portion 10B. When viewed from the front (front), the depth portion 10 </ b> A and the ascending portion 10 </ b> B are disposed within the range of the width of the catalyst body 32.

(Mounting structure of shielding member 40)
On both sides of the exhaust opening 30 of the rear wall 17a of the cooking chamber 17, screw holes are provided as fastening portions 51 for attaching the shielding member 40 to the rear wall 17a. Further, on both the left and right sides of the shielding member 40, attachment portions 43 provided with attachment holes are provided. By fastening the fastening member 50 such as a screw to the fastening portion 51 through the attachment hole of the attachment portion 43, the shielding member 40 can be detachably attached to the rear wall 17a. The fastening member 50 can be fastened and unfastened from the inside of the cooking chamber 17, and the shielding member 40 can be attached and detached from the inside of the cooking chamber 17. By doing in this way, the user can open the cooking chamber door 7 and take out the shielding member 40 out of the cooking chamber 17, and remove and maintain dirt adhered to the shielding member 40 and the partition plate 42. It can be carried out. The attachment structure of the shielding member 40 is not limited to this, and any structure can be adopted as long as the shielding member 40 can be attached and detached from the inside of the cooking chamber 17.

(Cooking room exhaust port 28, shielding member 40)
FIG. 8 is a side cross-sectional view of the cooking chamber exhaust duct 10 portion of the main body 1 according to the first embodiment. 9A and 9B are diagrams for explaining the vicinity of the cooking chamber exhaust port 28 according to the first embodiment, where FIG. 9A is a schematic cross-sectional view, and FIG. 9B is a diagram of the cooking chamber exhaust port 28 viewed obliquely from above.

  A cooking chamber exhaust port 28 formed between the rear wall 17 a of the cooking chamber 17 and the shielding member 40 opens toward the upper plate 23 a side of the cooking chamber 17. In this Embodiment 1, the cooking chamber exhaust port 28 has an opening surface which inclines downward toward the inside of the cooking chamber 17 from the rear wall 17a. Since the opening surface of the cooking chamber exhaust port 28 is inclined, even if the scattered matter from the object to be heated is placed on the periphery of the opening surface of the cooking chamber exhaust port 28, the scattered matter is caused by the gravity in the cooking chamber opening 28. Slid down along and falls into the cooking chamber 17. For this reason, it can reduce that such a solid substance penetrate | invades into the cooking chamber exhaust duct 10 from the cooking chamber exhaust port 28. FIG.

  The front part 41 a of the shielding wall 41 of the shielding member 40 is connected to the lower end of the exhaust opening 30, and is inclined so that the upper part protrudes toward the inside of the cooking chamber 17. In other words, the shielding wall 41 of the shielding member 40 is configured such that the protrusion from the rear wall 17a is smaller in the lower direction than in the upper direction.

(Dimensions related to cooking chamber exhaust 28)
Here, the dimensional relationship related to the cooking chamber exhaust port 28 will be described. In FIG. 9A, the upper end portion of the cooking chamber exhaust port 28 is referred to as X1, and the lower end portion of the cooking chamber exhaust port 28 (that is, the upper end portion of the front portion 41a of the shielding wall 41) is referred to as Y1.

  As shown in FIG. 9, the upper end portion X1 of the cooking chamber exhaust port 28 is the same height as the upper end portion of the exhaust opening 30 provided on the rear wall 17a. And the lower end part Y1 of the cooking chamber exhaust port 28 exists in a position lower than the upper end part Y1. With such a configuration, an opening surface of the cooking chamber exhaust port 28 that is inclined downward from the rear wall 17a toward the inside of the cooking chamber 17 is configured.

Further, the protruding dimension from the rear wall 17a at the upper end portion of the front portion 41a of the shielding wall 41 (lower end portion Y1 of the cooking chamber exhaust port 28) is W1, and the upper end portion of the front portion 41a of the shielding wall 41 (cooking chamber exhaust port). Assuming that the distance between the lower end portion Y1 of 28 and the upper plate 23a is W0, in the first embodiment, W0 and W1 are approximately equal or less than W0 (W1 ≦ W0). This is a configuration for exhausting the air in the cooking chamber 17 with a small increase in pressure loss and performing a smooth exhaust.
For example, unlike the first embodiment, when W0 <W1, when the air in the cooking chamber 17 flows into the cooking chamber exhaust port 28, the air path is once reduced (W0) and enlarged (W1). As a result, the increase in pressure loss is large.

  Further, the distance W3 from the bottom surface of the cooking chamber 17 to the lower end Y1 of the cooking chamber exhaust port 28 is larger than ½ of the height in the cooking chamber 17, and the cooking chamber exhaust port 28 is located above the cooking chamber 17. Is open. By disposing the cooking chamber exhaust port 28 above the cooking chamber 17, the exhaust gas containing a large amount of pollutants such as smoke and odor components accumulated above the cooking chamber 17 due to the rising airflow caused by heating during cooking can be used. It is easy to inhale through the mouth 28. In other words, the lower air that has less contaminants such as smoke and odor components than the air above the cooking chamber 17 is less likely to be sucked from the cooking chamber exhaust port 28.

  Note that the cooking chamber exhaust port 28 is preferably provided as high as possible in the cooking chamber 17 in terms of facilitating the intake of exhaust gas containing more contaminants accumulated above the cooking chamber 17. In this case, however, the cooking chamber exhaust port is provided. The distance W0 between the lower end of 28 and the upper plate 23a is reduced. Then, in order to satisfy the relationship of W1 ≦ W0, the projecting dimension W1 from the rear wall 17a of the shielding member 40 is also reduced, leading to a reduction in the opening area of the cooking chamber exhaust port 28 and affecting the exhaust efficiency. Therefore, the height of the cooking chamber exhaust port 28 is set in consideration of setting the opening area of the cooking chamber exhaust port 28 so as to ensure appropriate exhaust efficiency and facilitating the intake of exhaust gas having a high contaminant concentration. Set.

  In addition, an angle θ formed by the bottom surface 10d of the cooking chamber exhaust duct 10 (connecting portion 10C) and the bottom surface of the shielding member 40 is an obtuse angle. Thus, by making the angle θ an obtuse angle, it is possible to moderate the bending of the airflow when the exhaust in the shielding member 40 proceeds to the connecting portion 10C, and to reduce the increase in pressure loss due to the bending of the airflow. Yes.

  Further, the area of the front surface side of the catalyst body 32 is a surface surrounded by the upper end side of the exhaust opening 30 and the upper end side of the shielding member 40 (shielding wall 41) (surface to be shaded in FIG. 9B). In the first embodiment, the area is equal to the cross-sectional area of the cooking chamber exhaust port 28). Therefore, in the first embodiment, the width of the catalyst body 32 is substantially the same as the width of the cooking chamber exhaust port 28 (width in the left-right direction), and the height of the catalyst body 32 is set to the exhaust opening. The distance from the upper end of the part 30 to the upper end of the shielding member 40 (W2 in FIG. 9) is made larger. Due to the dimensional relationship of the catalyst body 32, the pressure loss when passing through the catalyst body 32 by slowing the passing air speed of the exhaust gas in the catalyst body 32 is reduced. In addition, by reducing the passing speed of exhaust gas in the catalyst body 32, the contact rate with the catalyst adhering to the surface of the catalyst body 32 is increased, and the indoor air pollutants such as oil smoke and odor components are removed by the catalyst body 32. Is increasing.

[Operation of cooking device]
Next, the operation of the cooking device will be described.
(Cooking on the top plate)
When receiving an operation such as a heating start instruction for the operation unit 6, the heating device in the induction heating coil unit 11, the radiant heater 13, or the cooking chamber 17 is driven from the electronic circuit board 12, and cooking by these heating devices is performed.
In addition to the cooking chamber 17, the induction heating coil unit 11 and the radial heater 13 are provided to enable cooking on the top plate 4, so that cooking can be performed outside the cooking chamber 17 and a wide range of cooking is possible.

(Cooking in the cooking room)
Next, the operation when the cooking in the cooking chamber 17 mainly related to the present invention is instructed will be described.
Here, in the cooking chamber 17, the object to be heated is placed on the cooking table 26 and cooked. The object to be heated may be a food such as fish as it is, or may be wrapped or stored in a cooking container or the like.

  When cooking in the cooking chamber 17 is selected / instructed by an operation on the operation unit 6 by the user, heating by the upper heating device 24, the lower heating device 25, and the catalyst heating device 33 is started. The article to be heated is heated by driving the upper heating device 24 and the lower heating device 25. Further, the catalyst body 32 is heated by driving the catalyst heating device 33. Note that the heating start / stop timing and the heating power change timing by these heating devices are the temperature detected by the operation instruction and cooking menu set in the operation unit 6 and the temperature sensor (not shown) in the cooking chamber 17. Control based on data.

When heating by the heating device is started, the cooling fan 18 is also driven.
Next, the intake / exhaust operation of the cooking chamber 17 will be described.

(Cooking room intake and exhaust operation)
When heating in the cooking chamber 17 is started, depending on the cooking menu, the upper heating device 24 and the lower heating device 25 generate heat to 500 to 800 ° C as an example, and the temperature in the cooking chamber 17 is 200 to 350 ° C. It becomes. For this reason, even if a certain heat insulating means is provided on the wall surface of the cooking chamber 17, the temperature in the housing 2 rises due to radiation and heat transfer. Therefore, when the cooking chamber 17 is used, the cooling fan 18 is driven to prevent the components inside the housing 2 from functioning and the life from being shortened due to the temperature rise in the housing 2. Each component in 2 is cooled so as to be a heat resistant temperature or lower.

  When the cooling fan 18 operates, external air passes through the intake / exhaust port cover 5, flows from the housing intake port 8 into the substrate case unit intake port 21 of the substrate case unit 15, and is sucked and sent out to the cooling fan 18. The The air flowing through the substrate case unit 15 cools the self-heating caused by the operation of components mounted on the electronic circuit board 12 in the substrate case unit 15, and then is sent from the substrate case unit exhaust port 22 and flows into the chamber 16. . The cooling air flowing into the chamber 16 is blown out from the air outlet 16a on the upper surface of the chamber 16, cools the induction heating coil unit 11 disposed above, and then enters the cooling air exhaust air passage inlet 20 on the rear surface side. Inflow.

  A part of the cooling air flowing into the cooling air exhaust air passage inlet 20 enters the cooling air exhaust duct 14 and passes through it, and is exhausted from the housing exhaust port 9 through the intake / exhaust port cover 5 to the outside of the housing. Is done.

Further, part of the cooling air flowing into the cooling air exhaust air passage inlet 20 enters the cooking chamber exhaust duct 10 from the nozzle 34 and passes through the rising portion 10B, exits from the upper surface opening 10c, and is The air is exhausted outside the housing through the exhaust port 9 and the intake / exhaust port cover 5. The air blown out from the nozzle 34 functions as a driving fluid and generates an ejector in the cooking chamber exhaust duct 10. As a result, suction force is generated in the exhaust opening 30 and the cooking chamber exhaust port 28, and the air in the cooking chamber 17 is sucked.
The control of the operation timing and operation time of the cooling fan 18 can be applied as long as the operation and quality of the product are not impaired. For example, the cooling fan 18 is not operated for a predetermined time from the start of cooking or until a temperature detected by a temperature detecting means (not shown) provided in the cooking chamber 17 or the housing 2 reaches a predetermined temperature. can do. By doing in this way, the cooking chamber 17 is not exhausted while the cooling fan 18 is stopped, the temperature rise in the cooking chamber 17 is accelerated, the heating efficiency is improved, and the cooking time can be shortened. In addition, it is possible to accelerate the temperature rise of the catalyst body 32 by heating from the catalyst heating means 33 and to improve the purification performance of contaminants at the beginning of cooking.

Next, contamination factors and behaviors that occur during cooking in the cooking chamber 17 will be described.
When cooking is performed in the cooking chamber 17, the surface portion of the food that is the object to be heated can be burnt and carbonized, and can be scattered as dust due to the rising air current inside the cooking chamber 17. Moreover, when the water | moisture content etc. in a foodstuff evaporate, the foodstuff inside bursts, and the solid substance which comprises a foodstuff, a part of steamed oil and oil can be scattered. These scattered substances collide and adhere to the wall surface and upper surface in the cooking chamber 17 as contaminants. However, if contaminants adhere to the inside of the cooking chamber exhaust duct 10 and the catalyst body 32, the exhaust efficiency decreases and the catalyst body. The function of decomposing oil smoke and odor components due to 32 can be reduced.

  In the first embodiment, a shielding member 40 is arranged on the inner side of the cooking chamber 17 of the exhaust opening 30 that is an entrance to the cooking chamber exhaust duct 10. For this reason, most of the contaminants generated from the object to be heated on the cooking table 26 are blocked by the shielding member 40 and are difficult to enter the cooking chamber exhaust duct 10 from the exhaust opening 30. In addition, the cooking chamber exhaust port 28 formed between the shielding member 40 and the rear wall 17a is generally open toward the upper plate 23a of the cooking chamber 17, so that contamination occurs via the cooking chamber exhaust port 28. It is less likely that objects will enter the cooking chamber exhaust duct 10. Further, since the selective permeation surface 29 is provided in the cooking chamber exhaust port 28, solid matter that cannot pass through the opening of the selective permeation surface 29 does not enter the cooking chamber exhaust duct 10.

  Fine solids that have passed through the opening of the permselective surface 29 can enter the cooking chamber exhaust duct 10 through the cooking chamber exhaust port 28, but the main body along with the exhaust gas flows due to the flow of air in the cooking chamber exhaust duct 10. 1 is sent to the outside. Further, even if fine solids that have not been discharged together with the exhaust remain in the cooking chamber exhaust duct 10 or the catalyst body 32, the exhaust opening 30 is exposed by removing the shielding member 40 from the rear wall 17a. Can clean and remove the fine solid matter adhering to the inside of the catalyst body 32 and the cooking chamber exhaust duct 10 and the contaminants such as the oil and fat condensed and fixed, and the maintenance is easy.

  Moreover, since the shielding member 40 can be removed and taken out of the cooking chamber 17, the shielding member 40 itself and the partition plate 42 provided on the shielding member 40 can be easily cleaned and maintained. Easy to clean and maintain, users can easily maintain selective permeation performance on the selective permeation surface 29 over a long period of time, and can easily replace and restore selective permeation performance when performance deteriorates.・ Can be maintained.

Next, an exhaust route from the cooking chamber 17 will be described.
During the cooking process, steam, oily smoke, odor components, etc. are generated from the object to be heated. Moreover, steam and oily smoke, odor components, etc. generate | occur | produce, when the steam and oil which scattered from the foodstuff volatilize in contact with the saucer 27 and the downward heating apparatus 25. FIG. These steam, oily smoke, odor components and the like are diffused into the cooking chamber 17 and then sucked from the cooking chamber exhaust port 28 by a suction action mainly based on the ejector effect by driving the cooling fan 18 described above.

  The protrusion dimension W1 from the rear wall 17a at the upper end portion of the front portion 41a of the shielding wall 41 is substantially equal to the distance W0 between the upper end portion of the front portion 41a of the shielding wall 41 and the upper plate 23a. In the exhaust inflow path from the upper end portion of the front portion 41a to the cooking chamber exhaust port 28, the change in the area of the channel cross section can be reduced. Thereby, the increase in the pressure loss of the airflow to the cooking chamber exhaust port 28 is suppressed.

  The exhaust sucked from the cooking chamber exhaust port 28 is partially purified by the catalyst body 32. A catalyst heating device 33 is provided in the vicinity of the catalyst body 32, and the catalyst activity is increased and the purification performance is improved by raising the temperature of the catalyst body 32.

  Further, the area of the front surface side of the catalyst body 32 is configured to be larger than the area of the surface surrounded by the upper end side of the exhaust opening 30 and the upper end side of the shielding member 40. Therefore, in the first embodiment, the width of the catalyst body 32 is approximately the same width as the cooking chamber exhaust port 28, and the height dimension of the catalyst body 32 is set to the upper end side of the exhaust opening 30. The distance W2 is larger than the distance W2 connecting the upper end side of the shielding member 40. Thereby, the front surface area of the catalyst body 32 is made larger than the inflow area at the cooking chamber exhaust port 28, and the inflow wind speed of the exhaust gas to the catalyst body 32 is made slower. For this reason, an increase in pressure loss when exhaust gas passes through the catalyst body 32 is reduced. Further, by reducing the wind speed of the exhaust gas passing through the catalyst body 32, the contact time of the exhaust gas with the catalyst attached to the catalyst body 32 is lengthened, and more pollutants can be purified, and the cleanliness of the exhaust gas is increased. Can do.

  The exhaust gas that has passed through the catalyst body 32 passes through the connecting portion 10C and the depth portion 10A of the cooking chamber exhaust duct 10 and proceeds to the ascending portion 10B. Since the upper surface 10a of the depth portion 10A is composed of an inclined surface that rises in the rear direction, the rising airflow (draft) of the high-temperature exhaust can be used for the flow of the exhaust, and suction (attraction) by the ejector of the nozzle 34 ) Assists the exhaust by raising the exhaust capacity.

  The exhaust in the cooking chamber exhaust duct 10 exits the cooking chamber exhaust duct 10 from the upper surface opening 10 c and is exhausted from the housing exhaust port 9 to the outside of the main body 1. Here, the cooking chamber exhaust duct 10 is disposed in the cooling air exhaust duct 14. In the cooling air exhaust duct 14, cooling air after cooling the substrate case unit 15 and the induction heating coil unit 11 flows, whereas the exhaust gas flowing through the cooking chamber exhaust duct 10 is heated in the cooking chamber 17. The exhaust gas is hot and is hotter than the cooling air after cooling the substrate case unit 15 and the induction heating coil unit 11. For this reason, the relatively low temperature cooling air flowing in the cooling air exhaust duct 14 cools the relatively high temperature cooking chamber exhaust duct 10, and the exhaust in the cooking chamber exhaust duct 10 is cooled. Further, the exhaust from the cooking chamber exhaust duct 10 is mixed with the cooling air from the cooling air exhaust duct 14 and flows out of the housing 2 from the housing exhaust port 9 at a low temperature.

  In the first embodiment, the cooling air sent out by the cooling fan 18 cools various components (the induction heating coil unit 11 and the like) of the induction heating cooker 100 and induces exhaust of the cooking chamber 17. It functions as a driving flow. Therefore, it is necessary to distribute the cooling air to both so that both of these functions can be appropriately realized. In the first embodiment, the distribution of the cooling air is controlled by the occupation ratio of the cooking chamber exhaust duct 10 with respect to the cross section of the cooling air exhaust duct 14. In setting the occupation ratio of the cooking chamber exhaust duct 10 with respect to the air passage cross-sectional area of the cooling air exhaust duct 14, the following matters are taken into consideration.

(1) Increase in pressure loss due to exhaust of cooling air in the cooling air exhaust duct 14 When this increase in pressure loss increases, it is necessary to increase the capacity of the cooling fan 18 in order to cool various components in the housing 2. If this happens, noise and power consumption by the cooling fan 18 will increase. For this reason, in consideration of the balance between the cooling capacity of the cooling fan 18 and the amount of increase in pressure loss caused by the cooling air exhaust in the cooling air exhaust duct 14, the cooking chamber exhaust duct with respect to the cross section of the cooling air exhaust duct 14. An occupancy of 10 is set.

(2) Inflow amount of cooling air into nozzle 34 of cooking chamber exhaust duct 10 In connection with (1), when the pressure loss accompanying the exhaust of cooling air in the cooling air exhaust duct 14 is extremely low, cooling air exhaust A lot of cooling air flows through the duct 14, and the amount of cooling air flowing into the nozzle 34 of the cooking chamber exhaust duct 10 decreases, thereby reducing the ejector effect. If this happens, the cooking chamber 17 will not be sufficiently exhausted. For this reason, in this Embodiment 1, the amount of cooling air flowing into the nozzle 34 that enables appropriate exhaust from the cooking chamber 17 is ensured. Considering that the pressure loss due to the exhaust does not become extremely low, the occupation ratio of the cooking chamber exhaust duct 10 with respect to the cross section of the cooling air exhaust duct 14 is set.

  And in this Embodiment 1, in order to reduce the occupation rate of the cooking chamber exhaust duct 10 which occupies for the cross-section of the cooling air exhaust duct 14, the wind of the depth part 10A and the ascending part 10B of the cooking chamber exhaust duct 10 is reduced. The path width is configured to be narrower than the width of the catalyst body 32. In this case, by providing the cooking chamber exhaust duct 10 within the width of the catalyst body 32, an increase in pressure loss due to reduction in the flow path width occurs, but by increasing the pressure loss by not providing a crank-shaped bend or the like. Suppressed. Thereby, the attraction performance by the ejector can be reduced, and the effect of low noise and energy saving can be obtained by not increasing the capacity of the cooling fan that generates the driving airflow.

  The occupation ratio of the cooking chamber exhaust duct 10 with respect to the air passage cross-sectional area of the cooling air exhaust duct 14 takes into consideration the above-mentioned items (1) and (2) as well as the capacity of the cooling fan 18 and each air passage cross-sectional area. For example, in the induction heating cooker 100 shown in the first embodiment, it is preferably 50% or less. Further, in the case of the induction heating cooker 100 shown in the first embodiment, the exhaust gas flowing through the cooking chamber exhaust duct 10 has an air volume of 1/5 to 1/10 of the cooling air flowing through the cooling air exhaust duct 14. Thus, by making the air path cross section of the cooking chamber exhaust duct 10 smaller than the cooling air exhaust duct 14, the pressure balance of the exhaust gas as the whole of the induction heating cooker 100 is optimized, and the ventilation load of the cooling fan 18 is increased. The noise of the cooling fan 18 can be reduced.

  As described above, in the first embodiment, the cooking chamber exhaust port 28 is provided above the cooking chamber 17. More specifically, the cooking chamber exhaust port 28 was opened above the center in the height direction in the cooking chamber 17. Thereby, the pollutants such as smoke and odor components accumulated above the cooking chamber 17 due to the rising airflow due to heating accompanying cooking can be efficiently exhausted with a small exhaust air volume. By exhausting the pollutant, the contact of the pollutant with the object to be heated is reduced, and a good cooking effect / finish is obtained. Further, since the air below the cooking chamber 17 having a low concentration of pollutants is difficult to exhaust, it is possible to reduce excess exhaust with a low pollutant removal efficiency, thereby reducing exhaust heat from the cooking chamber 17. By reducing the exhaust heat in the cooking chamber 17, the temperature drop in the cooking chamber 17 can be suppressed, so that the heating efficiency is increased, and heat cooking can be performed in an energy saving and short time. Thus, it can be set as the heating cooker with high cooking performance and low environmental load.

  Further, an exhaust opening 30 is provided in the rear wall 17 a of the cooking chamber 17, the cooking chamber exhaust duct 10 is connected to the exhaust opening 30, and the cooking chamber exhaust duct 10 is not disposed above the cooking chamber 17. It was set as the structure which both do not overlap in a height direction. For this reason, even when the overall height dimension of the induction heating cooker 100 is defined by standardization or the like, the induction heating coil unit 11 and the radiant heater 13 are incorporated without reducing the height of the cooking chamber 17. Easy to secure space. Moreover, since the indoor height of the cooking chamber 17 can be ensured, the height dimension limitation of the to-be-heated object in the cooking chamber 17 is small, and it can be set as the highly functional heating cooker with a wide cooking range and easy to use.

  Moreover, the protrusion dimension W1 from the rear wall 17a of the shielding member 40 at the lower end portion of the cooking chamber exhaust port 28 is substantially equal to the distance W0 between the upper plate 23a and the lower end of the cooking chamber exhaust port 28, or W1 is less than W0. Dimension. Thereby, the increase in the pressure loss accompanying inflow of the exhaust_gas | exhaustion from the cooking chamber 17 to the cooking chamber exhaust port 28 is reduced, and it can exhaust by low suction (attraction) performance. For this reason, the fan load of the cooling fan 18 can be reduced, and an energy-saving and low-noise heating cooker can be obtained.

  Further, the cooking chamber exhaust duct 10 is provided with a catalyst body 32, the width of the catalyst body 32 is substantially the same as the width of the cooking chamber exhaust port 28, and the height of the catalyst body 32 is the upper end side of the exhaust opening 30 and the shielding member. It was made larger than the distance W2 connecting the upper end side of 40. In this way, the width of the air passage from the cooking chamber exhaust port 28 to the catalyst body 32 is not reduced, so that pressure loss due to the reduction of the air passage width does not occur. Moreover, since the height dimension of the catalyst body 32 is expanded to reduce the front wind speed and the pressure loss is reduced, the load on the fan of the cooling fan 18 can be reduced, and an energy-saving and low-noise heating cooker is obtained. Can do. Further, by making the flow path cross-sectional area in the catalyst body 32 larger than the flow path cross-sectional area in the cooking chamber exhaust port 28, the exhaust air passing speed in the catalyst body 32 can be reduced and the purification performance can be improved. For this reason, the cleanliness of the exhaust discharged from the cooking chamber exhaust duct 10 to the outside is high, and there is little smoke and odor, and the cooking environment / working environment in which the heating cooker is installed can be kept good.

  Moreover, since the opening surface of the cooking chamber exhaust port 28 is an inclined surface that descends from the rear wall 17 a toward the inside of the cooking chamber 17, foreign substances and liquids placed on the cooking chamber exhaust port 28 are moved into the cooking chamber 17. It is possible to reduce the entry of foreign matter or liquid into the cooking chamber exhaust duct 10. Further, by providing the selective permeation surface 29 at the cooking chamber exhaust port 28, relatively large foreign objects are prevented from entering the cooking chamber exhaust duct 10 from the cooking chamber exhaust port 28. In this way, the entry of foreign matter and liquid into the cooking chamber exhaust duct 10 can be reduced, and the adhesion and accumulation of contaminants in the cooking chamber exhaust duct 10 can also be reduced. Since the adherence of contaminants to the catalyst body 32 is also reduced, it is possible to suppress a reduction in exhaust air volume due to the adherence of contaminants to the catalyst body 32 and an increase in pressure loss, and the contaminants attached to the catalyst body 32 The user's discomfort due to the generation of odor can be suppressed. Moreover, since the fall of the purification performance of the catalyst body 32 can be delayed, it is possible to maintain a stable exhaust / purification performance for a long period of time, and a cooking device having a long product life and a low environmental load can be obtained.

  Further, a cooling fan 18 is provided, and the cooling fan 18 sends out cooling air for various components constituting the induction heating cooker 100 such as the electronic circuit board 12 and the induction heating coil unit 11 in the board case unit 15. This contributes to the maintenance of product functions and longer service life by suppressing the temperature rise. Further, the cooling air generated in the housing 2 by the operation of the cooling fan 18 is caused to flow from the nozzle 34 into the cooking chamber exhaust duct 10, thereby causing an ejector effect to induce exhaust from the cooking chamber 17. . That is, the cooling fan 18 is caused to function as a driving airflow for attracting exhaust from the cooking chamber 17. By doing in this way, the air in the cooking chamber 17 can be exhausted, the attachment of smoke and odor to the food material to be heated is reduced, and a good cooking effect / finish can be obtained. Thus, the cooling fan 18 realizes a cooling function of various components of the induction heating cooker 100 and a function of inducing exhaust of the cooking chamber 17. Compared to a case where a blower that induces exhaust of the cooking chamber 17 is separately provided, the number of parts can be reduced, and the induction heating cooker 100 can be downsized.

  In addition, the cooking chamber exhaust duct 10 is provided in the substrate case unit 15 and the cooling air exhaust duct 14 through which the cooling air after cooling the induction heating coil unit 11 flows. By doing in this way, the comparatively low temperature cooling air flowing through the cooling air exhaust duct 14 can lower the temperature of the relatively high temperature exhaust flowing through the cooking chamber exhaust duct 10. Furthermore, since the cooling air from the cooling air exhaust duct 14 and the exhaust from the cooking chamber exhaust duct 10 are mixed and flow out to the outside from the housing exhaust port 9, the temperature of the exhaust from the housing 2 Can be reduced. Thus, by lowering the temperature of the exhaust from the housing 2, the safety when the exhaust contacts the user can be improved.

  Further, the shielding member 40 is configured to be detachable from the cooking chamber 17. The shield member 40 can be attached and detached from the inside of the cooking chamber 17 so that the shield member 40 can be carried out of the cooking chamber 17 from the front side of the cooking chamber 17. Thereby, the user can clean and maintain the inside of the cooking chamber exhaust duct 10 and the catalyst body 32 from the inside of the cooking chamber 17 by removing the shielding member 40. Moreover, since the shielding member 40 can be removed and taken out of the cooking chamber 17, the shielding plate 40 and the partition plate 42 constituting the selective transmission surface 29 can be easily maintained. An object to be heated adheres to a small opening that constitutes the selective transmission surface 29, and the exhaust air volume at the selective transmission surface 29 may be reduced. However, exhausting the selective transmission surface 29 by removing the shielding member 40 for maintenance can be performed. It is easy to recover and maintain the performance, and it is also easy to replace the shielding member 40. Thus, it is possible to maintain an appropriate exhaust air volume and exhaust cleanliness, and to provide a cooking device having a long product life and a low environmental load.

Embodiment 2. FIG.
In the first embodiment described above, the exhaust is sucked from the cooking chamber 17 by the operation of the cooling fan 18. However, in the second embodiment, another configuration for sucking the exhaust from the cooking chamber 17 is provided. ing.
In the first embodiment, the catalyst body 32 is disposed in the connection portion 10 </ b> C connected to the exhaust opening 30 provided on the rear wall 17 a of the cooking chamber 17, and is shielded in front of the exhaust opening 30. Although the configuration is such that the member 40 is attached, the catalyst body 32 is provided on the shielding member 400 in the second embodiment. In the second embodiment, the catalyst heating device 33 in the first embodiment is not provided.
The rest is the same as in the first embodiment, and in the following, the parts of the second embodiment different from the first embodiment will be mainly described.

  The heating cooker according to the second embodiment has the same configuration as shown in FIGS.

(Drive airflow duct 35)
FIG. 10 is an upper perspective view showing the entire cooking chamber 17 according to the second embodiment. FIG. 11 is a perspective view of the entire cooking chamber 17 according to Embodiment 2 as viewed from below.
In the first embodiment, the catalyst heating device 33 is provided in the cooking chamber exhaust duct 10, and the connection terminal of the catalyst heating device 33 is exposed to the side of the cooking chamber exhaust duct 10. 2 does not include the catalyst heating device 33.

A driving airflow duct 35 is provided below the cooking chamber exhaust duct 10.
The driving airflow duct 35 is a pipe line connecting the nozzle 34 provided on the bottom surface 10 d of the cooking chamber exhaust duct 10 and a space below the nozzle 34. The nozzle 34 communicates with the internal cooling air passage via the cooling air exhaust air passage inlet 20 in the above-described first embodiment, but communicates with the inside of the driving air flow duct 35 in this second embodiment. . The bottom surface of the driving airflow duct 35 is open, and this opening is referred to as an inlet side opening 37.
The drive airflow duct 35 is detachably joined to the cooking chamber exhaust duct 10 by a fastening member 50.

A driving airflow fan 36 is provided in the driving airflow duct 35.
A driving airflow inlet 38 is opened on the bottom surface of the housing 2, and the driving airflow duct 35 is disposed so that the driving airflow inlet 38 and the inlet side opening 37 face each other (described later). FIG. 15). By operating the driving airflow fan 36, air outside the housing 2 is sucked into the driving airflow duct 35 through the driving airflow suction port 38 and the inlet side opening 37. The sucked air is blown out as a driving fluid from the nozzle 34 on the bottom surface 10 d of the cooking chamber exhaust duct 10 into the cooking chamber exhaust duct 10. The ejector effect is generated by blowing out the driving airflow from the nozzle 34, and the air in the cooking chamber 17 is sucked (attracted) into the cooking chamber exhaust duct 10. In the second embodiment, the driving airflow fan 36 corresponds to the blower according to the present invention. The housing 2 is placed on a kitchen or the like so as to secure a space for sucking air below the driving airflow suction port 38.

  The bottom surface of the cooking chamber exhaust duct 10 and the top opening of the driving airflow duct 35 are connected with high sealing properties, and the airflow sent from the driving airflow fan 36 is generally ejected from the nozzle 34. By providing the dedicated driving airflow fan 36 for blowing air from the nozzle 34 into the cooking chamber exhaust duct 10, a higher ejector effect can be obtained and higher suction (attraction) performance from the cooking chamber 17 can be obtained. Can do. Thereby, the freedom degree of selection of the catalyst body 32 increases. That is, as the catalyst body 32, those having a fine opening and a small opening through which the exhaust passes, and those having a large thickness and a long flow path, such as those having a large contact area with the exhaust and high purification performance, but also having a large pressure loss. However, such a catalyst body 32 can be employed due to the high suction (attraction) performance by the driving airflow fan 36. By using the catalyst body 32 having such a high purification performance, the cleanliness of the exhaust can be increased.

  FIG. 12 is a perspective view of the cooking chamber 17 according to Embodiment 2 with the upper plate 23a and the cooking chamber door 7 removed. FIG. 13 is an exploded perspective view showing an attachment state of the shielding member 400 in a state where the upper plate 23a of the cooking chamber 17, the cooking chamber door 7, the cooking table 26, and the saucer 27 are removed according to the second embodiment. FIG. 14 is an exploded perspective view of a state in which the catalyst body 32 is held on the shielding member 400 according to the second embodiment. FIG. 15 is a side sectional view of the cooking chamber exhaust duct 10 portion of the main body 1 according to the second embodiment. FIGS. 16A and 16B are diagrams for explaining the vicinity of the cooking chamber exhaust port 280 according to the second embodiment, wherein FIG. 16A is a schematic cross-sectional view, and FIG. 16B is a diagram of the cooking chamber exhaust port 280 viewed obliquely from above.

(Shielding member 400)
The rear wall 17a of the cooking chamber 17 is provided with a shielding member 400 that forms a cooking chamber exhaust port 280 with a gap between the rear wall 17a and the rear wall 17a.
The shielding member 400 includes a shielding wall 401 and catalyst body holding portions 402 and 403 that hold the catalyst body 32. The shielding wall 401 includes a front portion 401a that is inclined so as to protrude from the lower side to the upper side toward the inside of the cooking chamber 17 (front direction), and a side portion 401b that extends rearward from a side end portion of the front portion 401a. It is a wall structure consisting of The shielding wall 401 shields at least a part of the exhaust opening 30 provided on the rear wall 17 a of the cooking chamber 17 from the inside of the cooking chamber 17.

  The catalyst body holding portion 402 has a pair of front and rear guide portions 402a and 402b extending in the height direction, and holds the left and right end portions of the plate-like catalyst body 32 between the pair of guide portions 402a and 402b. The catalyst body holding part 403 includes a bottom part 403a extending from the lower end of the shielding wall 401 toward the back side, and a guide part 403b rising from the back side end part of the bottom part 403a. The catalyst body holding part 403 according to the second embodiment is provided along the width direction of the shielding wall 401, and the lower part of the plate-like catalyst body 32 is provided between the guide part 403 b and the lower end part of the shielding wall 401. Hold. The catalyst body 32 can be attached to the shielding member 400 by sliding the catalyst body 32 downward along the catalyst body holding portion 402 from above the shielding member 400. The catalyst body 32 is detachable from the shielding member 400. The structure of the catalyst body holding portions 402 and 403 shown in the second embodiment is an example, and the catalyst body 32 can be attached and detached, and the catalyst body 32 can be fitted to the exhaust opening 30 with almost no gap. Any configuration can be adopted as long as it can be combined.

  When the shielding member 400 to which the catalyst body 32 is attached is attached to the cooking chamber 17, the catalyst body holding portions 402 and 403 of the shielding member 400 are inserted into the exhaust opening 30 of the rear wall 17a. The opening shape of the exhaust opening 30 and the shape viewed from the front of the catalyst body 32 are substantially the same, and the catalyst body 32 is fitted into the exhaust opening 30. A screw hole is provided as a fastening portion 51 for attaching a fastening member 50 such as a screw to the lower portion of the exhaust opening 30 of the rear wall 17a. In addition, an attachment portion 404 in which an attachment hole into which the fastening member 50 is inserted is formed at the lower portion of the shielding member 400, and the fastening member 50 is fastened to the fastening portion 51 through the attachment hole of the attachment portion 404. The shielding member 400 can be detachably attached to the rear wall 17a. The fastening member 50 can be fastened and unfastened from the inside of the cooking chamber 17, and the shielding member 400 can be attached and detached from the inside of the cooking chamber 17. The user can take out the shielding member 400 outside the cooking chamber 17 with the cooking chamber door 7 opened, and perform cleaning to remove contaminants that may increase pressure loss and reduce purification performance, It is possible to restore the purification performance by exchanging the shielding member 400 and the catalyst body 32. The attachment structure of the shielding member 400 is not limited to this, and any structure can be adopted as long as the shielding member 400 can be attached and detached from the inside of the cooking chamber 17.

(Cooking room exhaust 280)
A gap is provided between the shielding wall 401 of the shielding member 400 and the rear wall 17a, and a cooking chamber exhaust port 280 is formed. The cooking chamber exhaust port 280 has an opening surface that is inclined downward from the rear wall 17 a toward the inside of the cooking chamber 17. Although the upper end portion X1 of the opening surface of the cooking chamber exhaust port 28 of the first embodiment is provided at the same height as the upper end portion of the exhaust opening portion 30, the cooking chamber exhaust port 280 of the second embodiment The upper end portion X2 (see FIG. 16) of the opening surface is provided at a position lower than the upper end portion of the exhaust opening portion 30. Further, the lower end portion Y <b> 2 of the opening surface of the cooking chamber exhaust port 280 is located below the upper heating device 24. When the exhaust opening 30 is viewed from the front (front side), the catalyst body 32 is shielded so that a part of the catalyst body 32 is disposed at a position higher than the upper end of the inclined wall 401 of the shielding member 400. It is inserted into the cooking chamber exhaust port 10 via the member 400.

  In this way, the radiant heat from the upper heating device 24 can easily reach a wider portion directly with respect to the catalyst body 32 fitted into the exhaust opening 30. As a result, even if the catalyst heating device 33 is not provided as in the first embodiment, the catalyst body 32 is heated and heated to increase the catalytic activity, thereby enabling the oxidative decomposition and purification of the pollutants contained in the exhaust gas. . For example, as compared with the case where the dedicated catalyst heating device 33 is provided as in the first embodiment, the temperature of the catalyst body 32 may decrease in the configuration of the second embodiment. However, an oxidation catalyst that can obtain catalytic activity at a relatively low temperature, such as platinum or manganese, is used as the catalyst to be attached to the catalyst body 32, the amount of catalyst addition is increased, the contact area between the catalyst body 32 and the exhaust is increased, etc. Thus, good purification performance can be obtained.

  In addition, although the cooking chamber exhaust port 280 of the second embodiment does not include the selective transmission surface 29 shown in the first embodiment, this is more radiant heat without blocking the radiant heat from the upper heating device 24. This is because priority is given to reaching the catalyst body 32. The selective transmission surface 29 may be provided in the cooking chamber exhaust port 280 according to the required purification performance. In this case, the non-opening portion (partition plate 42 in the first embodiment) of the selective transmission surface 29 is formed of an infrared transmission member, so that both reachability of radiant heat and prevention of entry of contaminants can be achieved. it can.

  In the second embodiment, as in the first embodiment, the distance W3 from the bottom surface of the cooking chamber 17 to the lower end Y2 of the cooking chamber exhaust port 280 is less than 1/2 of the height in the cooking chamber 17. The cooking chamber exhaust port 280 is open upward in the cooking chamber 17. Thereby, the exhaust containing a large amount of pollutants such as smoke and odor components accumulated in the upward airflow due to heating accompanying cooking is made easy to be sucked from the cooking chamber exhaust port 280 above the cooking chamber 17.

  Further, the protruding dimension from the rear wall 17a at the upper end portion of the front portion 401a of the shielding wall 401 (lower end portion Y2 of the cooking chamber exhaust port 280) is W1, and the upper end portion of the front portion 401a of the shielding wall 401 (cooking chamber exhaust port). Assuming that the distance between the lower end Y2) of the 280 and the upper plate 23a is W0, W0 and W1 (projection dimension of the shielding member 40) are substantially the same as in the first embodiment, or W1 is smaller than W0. (W1 ≦ W0). As described in the first embodiment, this is a configuration for exhausting the air in the cooking chamber 17 with less increase in pressure loss and performing smooth exhaust.

  Further, the area on the front surface side of the catalyst body 32 is larger than the area of the surface surrounded by the upper end side of the exhaust opening 30 and the upper end side of the shielding member 400 (the surface shaded in FIG. 16B). It is configured to be large. Therefore, in the second embodiment, the width of the catalyst body 32 is approximately the same width as the cooking chamber exhaust port 280, and the height dimension of the catalyst body 32 is set to the upper end side of the exhaust opening 30. The distance W2 is larger than the distance W2 connecting the upper end side of the shielding member 400. Due to the dimensional relationship of the catalyst body 32, as described in the first embodiment, the pressure loss when passing through the catalyst body 32 by slowing the passing air speed of the exhaust gas in the catalyst body 32 is reduced. In addition, by reducing the passing speed of exhaust gas in the catalyst body 32, the contact rate with the catalyst adhering to the surface of the catalyst body 32 is increased, and the indoor air pollutants such as oil smoke and odor components are removed by the catalyst body 32. Is increasing.

  In addition, an angle θ formed by the bottom surface 10d of the cooking chamber exhaust duct 10 (connecting portion 10C) and the bottom surface of the shielding member 40 is an obtuse angle. As described in the first embodiment, by setting the angle θ to an obtuse angle as described above, the bending of the airflow when the exhaust in the shielding member 400 proceeds to the connecting portion 10C can be made gentle, and the bending of the airflow The increase in pressure loss due to is reduced.

(Cooking room intake and exhaust operation)
Along with the start of heating in the cooking chamber 17, the driving airflow fan 36 also starts to operate. When the driving airflow fan 36 operates, external air flows into the driving airflow duct 35 from the driving airflow suction port 38 and the inlet side opening 37, and is sucked and sent out to the driving airflow fan 36, and exhausted from the nozzle 34 to the cooking chamber. It flows into the duct 10. And the air which flowed in into the cooking chamber exhaust duct 10 from the nozzle 34 is jetted in the rising part 10B of the cooking chamber exhaust duct 10 toward the upper surface opening 10c as a driving airflow, and thus into the cooking chamber exhaust duct 10. A jet is formed and functions as an ejector. Thereby, a suction force is generated in the exhaust opening 30 and the cooking chamber exhaust port 280, and the air in the cooking chamber 17 is sucked.

The air sucked from the cooking chamber 17 is partially purified by the catalyst body 32 in the process of passing through the catalyst body 32 provided in the exhaust opening 30. The catalyst body 32 is heated as the high-temperature exhaust gas passes through (utilizing exhaust heat from the exhaust gas), and is heated by receiving radiation from the upper heating device 24, thereby increasing the catalytic activity. Thereby, the reaction rate of the oxidative decomposition of the contaminants contained in the exhaust gas is increased, and the purification ability can be improved. Therefore, it can be set as the heating cooker with high purity of exhaust, and a favorable cooking work environment can be obtained.
The control of the operation timing and operation time of the driving airflow fan 36 can be applied within a range that does not impair the operation and quality of the product. For example, it is possible to prevent the driving airflow fan 36 from operating until a predetermined time from the start of cooking or until a temperature detected by a temperature detecting means (not shown) provided in the cooking chamber 17 reaches a predetermined temperature. By doing in this way, the cooking chamber 17 is not exhausted while the driving airflow fan 36 is stopped, the temperature rise in the cooking chamber 17 is accelerated, the heating efficiency is improved, and the cooking time can be shortened. Moreover, the temperature rise of the catalyst body 32 due to radiation from the upper heating device 24 can be accelerated to improve the purification performance of contaminants at the beginning of cooking.

  In addition, since the catalyst heating device 33 in the first embodiment is not provided, the power consumption (for example, about 300 W) of the catalyst heating device 33 is not required, energy saving is achieved, and a heating cooker with a low environmental load can be obtained. In addition, since the catalyst heating device 33 is not provided, the parts cost and assembly cost can be reduced, and an inexpensive cooking device can be obtained.

  In addition, since the driving airflow fan 36 is provided, the flow rate of air blown from the nozzle 34 can be increased, and a high ejector effect can be obtained. For this reason, the suction (attraction) performance of the exhaust in the cooking chamber 17 can be enhanced. Accordingly, the degree of freedom in selecting the catalyst body 32 is increased. That is, as the catalyst body 32, those having a fine opening and a small opening through which the exhaust passes, and those having a large thickness and a long flow path, such as those having a large contact area with the exhaust and high purification performance, but also having a large pressure loss. However, such a catalyst body 32 can be employed due to the high suction (attraction) performance by the driving airflow fan 36. By using the catalyst body 32 having such a high purification performance, the cleanliness of the exhaust can be increased.

  Similarly to the first embodiment, the cooking chamber exhaust duct 10 is provided in a part of the space of the cooling air exhaust duct 14, and the occupation ratio of the cooking chamber exhaust duct 10 in the cross section of the cooling air exhaust duct 14 is as follows. It is determined in consideration of the balance of pressure loss between the cooling air exhaust duct 14 and the cooking chamber exhaust duct 10. More specifically, it is set so that the sum of the noise of the operating point of the cooling fan 18 and the noise of the driving airflow fan 36 becomes low. By doing in this way, a cooking-by-heating machine with low operation noise can be obtained. For example, in the induction heating cooker 100 shown in the second embodiment, the occupation ratio of the cooking chamber exhaust duct 10 in the cross section of the cooling air exhaust duct 14 is preferably 50% or less.

  In addition, the catalyst body 32 is held and integrally attached to the shielding member 400, and the shielding member 400 and the catalyst body 32 can be carried in and out of the cooking chamber 17 through the opening of the cooking chamber door 7. For this reason, the cleaning / maintenance of the catalyst body 32 is facilitated, and the performance of the catalyst body 32 can be maintained. When the purification function deteriorates due to the catalyst life of the catalyst body 32, the catalyst body 32 can be replaced, so that a stable purification performance can be maintained over a long period of time, and the cooking device has a high reliability and a long product life. be able to.

  As described above, according to the second embodiment, the same operational effects as those of the first embodiment can be obtained, and the above-described operational effects can be obtained by the components different from the first embodiment.

  DESCRIPTION OF SYMBOLS 1 Main body, 2 housing | casing, 3 housing | casing upper frame, 4 top plate, 5 intake / exhaust port cover, 6 operation part, 7 cooking chamber door, 8 housing intake port, 9 housing exhaust port, 10 cooking chamber exhaust duct, 10A depth part, 10B ascending part, 10C connection part, 10a upper surface, 10b vertical part front surface, 10c upper surface opening, 10d bottom surface, 11 induction heating coil unit, 12 electronic circuit board, 13 radiant heater, 14 cooling air exhaust air passage, DESCRIPTION OF SYMBOLS 15 Board | substrate case unit, 16 chamber, 16a blower outlet, 17 cooking chamber, 17a rear wall, 17b right side wall, 17c left side wall, 18 cooling fan, 19 cooking chamber storage part, 20 cooling wind exhaust air path inlet, 21 board case Unit intake port, 22 Substrate case unit exhaust port, 23a Top plate, 23b Bottom plate, 24 Upper heating device, 25 Lower heating device, 2 Cooking table, 27 saucer, 28 cooking chamber exhaust port, 29 selective permeation surface, 30 exhaust opening, 32 catalyst body, 33 catalyst heating device, 34 nozzle, 35 driving airflow duct, 36 driving airflow fan, 37 inlet side opening , 38 Drive airflow inlet, 40 Shielding member, 41 Shielding wall, 42 Partition plate, 43 Mounting portion, 50 Fastening member, 51 Fastening portion, 100 Induction heating cooker, 280 Cooking chamber exhaust port, 400 Shielding member, 401 Shielding wall 402 catalyst body holding part, 402a guide part, 402b guide part, 403 catalyst body holding part, 403a bottom part, 403b guide part, 404 mounting part.

Claims (20)

A cooking chamber disposed in the housing and having an exhaust opening formed in a part of the wall;
Heating means disposed in the cooking chamber;
A cooking chamber exhaust duct that is disposed at a position that does not overlap the cooking chamber as viewed from above, and that communicates the exhaust opening with the outside of the housing;
There is an inclined surface provided in the cooking chamber opposite to the exhaust opening, and inclined in the inner direction of the cooking chamber from the lower part to the upper part of the exhaust opening, the inclined surface and the exhaust A shielding member which forms a cooking chamber exhaust port on one end side and forms a flow path from the cooking chamber exhaust port to the exhaust opening, with a gap between the wall surface provided with the opening and the wall. ,
The cooking chamber exhaust port is formed above the center in the height direction of the cooking chamber. The projecting dimension from the wall in which the exhaust opening is provided at the upper end of the front Symbol inclined surface, distance or substantially equal to the ceiling surface of the upper portion and the cooking chamber of the inclined surface, or small The heating cooker according to claim 1, characterized in that: Comprising a catalyst body fitted in the cooking chamber exhaust duct;
The cooking device according to claim 1 or 2, wherein a front surface area of the catalyst body is larger than an area surrounded by an upper end side of the exhaust opening and an upper end side of the shielding member. Both the front surface of the catalyst body and the surface connecting the upper end edge of the exhaust opening and the upper end edge of the shielding member are substantially rectangular,
The width of the front surface of the catalyst body is substantially the same width as a surface connecting the upper end edge of the exhaust opening and the upper end edge of the shielding member,
The cooking device according to claim 3, wherein the height of the front surface of the catalyst body is higher than a surface connecting the upper end edge of the exhaust opening and the upper end edge of the shielding member. The opening surface of the cooking chamber exhaust port is inclined so as to descend toward the cooking chamber from the wall surface where the exhaust opening is provided. The heating cooker as described in any one of Claims. The cooking device according to any one of claims 1 to 5, further comprising a partition member that partitions the cooking chamber exhaust port into a plurality of openings. The heating means is disposed above the cooking chamber,
The cooking device according to any one of claims 1 to 6, wherein a lower end portion of an opening surface of the cooking chamber exhaust port is provided at a position lower than the heating unit. The upper end portion of the cooking chamber exhaust port is positioned lower than the upper end portion of the exhaust opening,
Dependent on claim 3 or claim 3, characterized in that a portion of said catalyst body at a position higher than the upper end of the inclined surface of the shielding member when viewed the exhaust opening from the front The cooking device according to any one of claims 4 to 7. A blower that sends out an air flow for jetting air into the cooking chamber exhaust duct from a nozzle that is open at the bottom of the cooking chamber exhaust duct;
The heating according to any one of claims 1 to 8, wherein air in the cooking chamber is attracted into the cooking chamber exhaust duct by an ejection flow ejected into the cooking chamber exhaust duct. Cooking device. The subordinate to claim 3 or claim 3, wherein the air passage width of the cooking chamber exhaust duct on the downstream side of the catalyst body is narrower than the air passage width of the cooling air in the catalyst body. The cooking device according to any one of claims 4 to 9. The cooking device according to claim 10, wherein the cooking chamber exhaust duct is arranged such that a width of the cooking chamber exhaust duct is within a range of the width of the catalyst body when viewed from the front. The cooking chamber exhaust duct is configured in a substantially L shape in a side view,
The cooking device according to any one of claims 1 to 11, wherein an upper surface of the cooking chamber exhaust duct is configured such that a downstream side is higher than an upstream side of an exhaust flow. The housing is
A housing inlet and a housing outlet for communicating the inside of the housing with the outside;
A cooling air passage in the casing from the casing inlet to the casing exhaust,
Providing the blower in the cooling air passage in the housing;
The air flow sent out from the blower is a cooling air that flows through the cooling air passage in the housing, and an ejection flow that is jetted from the nozzle into the cooking chamber exhaust duct. Or the heating cooker as described in any one of Claims 10-12 which depend on Claim 9. A driving airflow duct disposed below the cooking chamber exhaust duct for communicating the nozzle and the outside of the housing;
The said air blower was provided in the said drive airflow duct. The heating cooker as described in any one of Claims 10-10 dependent on Claim 9 or Claim 9. The housing is
A housing inlet and a housing outlet for communicating the inside of the housing with the outside;
The cooking device according to claim 14, further comprising: an air passage extending from the housing intake port to the housing exhaust port, and an internal cooling air passage through which cooling air flows. The housing forms a part of the body cooling air path includes a housing an exhaust duct connected to the housing exhaust port,
The cooking device according to claim 13 or 15, wherein the cooking chamber exhaust duct is disposed in the housing exhaust duct. The cooking device according to claim 16, wherein the occupation ratio of the flow passage cross section of the cooking chamber exhaust duct occupying in the flow passage cross section of the casing exhaust duct is 50% or less. The cooking device according to any one of claims 1 to 17, wherein the shielding member is detachable from the cooking chamber. The dependent body according to claim 3 or claim 3, wherein the catalyst body is detachably held by the shielding member and is detachably fitted into the exhaust opening through the shielding member. The cooking device according to any one of claims 4 to 18 . The blower does not operate for a predetermined time from the start of cooking or until the temperature detected by the temperature detecting means provided in the cooking chamber or the casing reaches a predetermined temperature. The cooking device according to any one of claims 10 to 19, which is dependent on item 9.