JP7273750B2 - heating cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heating cooker having a grill chamber.

Grill chambers built into heating cookers are mainly those capable of simultaneously heating both sides of food by heat sources such as sheathed heaters and gas burners installed above and below the heating chamber. In addition to grilling meat, fish, etc. using the radiant heat of the heat source, this grill chamber can also be used for oven cooking to heat pizza, sweets, cakes, etc. by finely controlling the temperature inside the heating chamber. be.

A general grill chamber has an opening of the heating chamber on the front side of the heating cooker, and is provided with a door so as to cover the opening. Therefore, in order for the user to store food in the grill chamber, it is necessary to pull the handle of the door to open the opening of the heating chamber. When cooking in the grill chamber is started, the temperature inside the heating chamber rises due to the heat from the heat source, and the temperature of the door also rises accordingly. During cooking, the outer surface temperature of the door may rise to 100°C or higher, but the handle has a heat-insulating structure, so the temperature will not be dangerous even if the user touches it when opening or closing the door. is kept in

On the other hand, the door needs to be provided with a viewing window for visually checking the cooking status in the heating chamber and abnormalities such as food ignition, and highly transparent heat-resistant glass is often used for this viewing window. Since the heat-resistant glass used for the viewing window becomes hot due to the heat from the heat source, a technology has been proposed to improve safety by installing a structure that prevents the user from coming into contact with the heat-resistant glass. there is

For example, the abstract of Patent Literature 1 states, "The guard body suppresses and prevents the user's hands and fingers from touching the grill door and the viewing window, and when the user touches the guard body, it feels hot. To provide a safe and easy-to-use heating cooker capable of suppressing the occurrence of a fire. To provide a safe and easy-to-use heating cooker capable of suppressing a feeling of heat even when it touches the body", as a means for "providing a guard member 60 covering an observation window, the guard member 60 is provided. The main portion is made of synthetic resin, and a frame 44 having a support portion for supporting the guard member is arranged in front of the peripheral portion of the observation window. The guard member is rotatably supported by a supporting portion provided in the frame body, and is configured to be able to rotate forward and upward from a predetermined position. A rotating shaft is disposed in the left and right regions of the upper portion of the guard member, and the guard member is configured to rotate in a predetermined direction about the rotating shaft."

JP 2019-148345 A

As described above, in Patent Document 1, by providing a synthetic resin guard member so as to cover the glass observation window, the user is prevented from coming into contact with the high-temperature glass. Due to the property of having high thermal emissivity, the heat from the heat source is gradually transmitted to the guard member through the glass that is approximately the same size as the front opening of the grill, and eventually the guard member and the glass There was a risk that the temperature would reach the same level.

Therefore, in the present invention, even if heat transfer from the heat source of the grill chamber to the front of the heating cooker occurs through the glass for viewing, the temperature rise of the part that the user may contact is suppressed. To provide a heating cooker capable of securing the visibility of a heating chamber.

In order to achieve the above object, the cooking device of the present invention is a cooking device comprising a pot rest on the upper surface of a main body and a grill chamber below the pot rest, wherein the grill chamber is a heating chamber having a heater for heating the food; and a front-rear movable door closing the front opening of the heating chamber, the door forming an air passage between the resin front plate and the metal frame. a formed box, an intake opening serving as an inlet of the air passage provided at the bottom of the box, an exhaust opening serving as the outlet of the air passage provided at the top of the box, and the metal frame a window opening provided at the bottom, a glass plate covering the window opening, and a viewing window portion in which a plurality of small-diameter holes penetrating the resin front plate are arranged in a straight line.

According to the heating cooker of the present invention, it is possible to suppress the surface temperature of the front surface of the heating cooker with which the user may come into contact, and to secure the visibility of the heating chamber.

The perspective view of the heating cooker of Example 1 1 is an exploded perspective view of the heating cooker of Embodiment 1. FIG. Front cross-sectional view cut along the AA line shown in FIG. Side cross-sectional view cut along the BB line shown in FIG. Schematic diagram of side sectional view of grill storage exploded perspective view of door Schematic diagram of the grill chamber of Example 2 An exploded perspective view of the door of Example 3 An exploded perspective view of the door of Example 4 An exploded perspective view of the door of Example 5

An embodiment of the heating cooker of the present invention will be described in detail with appropriate reference to the drawings. In the following, a built-in type IH cooking heater equipped with a grill chamber is exemplified as an example of a heating cooker. The present invention can also be applied to a type gas stove.

First, the general structure of the heating cooker Z according to Embodiment 1 of the present invention will be outlined, and then the detailed structure of the grill chamber 5 will be described.
<Overall configuration of heating cooker Z>
The heating cooker Z of this embodiment has an IH (Induction Heating) function that generates eddy currents in the bottom of a metal pan placed on the upper surface, and heats the metal pan itself by Joule heat generated by the eddy currents. It is a cooker equipped with a grill function that heats the cooked food with the radiant heat of the heater. As shown in FIG. 1 and the like, hereinafter, front and rear, up and down, and left and right directions are defined with reference to the line of sight of the user facing the heating cooker Z. As shown in FIG.

FIG. 1 is a perspective view of the heating cooker Z, and FIG. 2 is an exploded perspective view of the heating cooker Z. As shown in FIG. As shown in both figures, the heating cooker Z comprises a main body 1, a top plate 2, a heating coil 3, a substrate case 8, and a grill chamber 5 to which the present invention is applied.

The main body 1 is a housing having an outer shell corresponding to the space (predetermined lateral width, front-rear width, and height) in which the heating cooker Z is installed, and has a box shape (concave shape) with an open top. Inside the main body 1, a grill chamber 5 is arranged on the left side, and a substrate case 8 is arranged on the right side. A heating coil 3, a display P1, and the like are installed above the grill chamber 5 and the substrate case 8, and a top plate 2 is installed so as to cover the top opening of the main body 1. As shown in FIG.

The top plate 2 includes three pot mounting portions 21 corresponding to the installation positions of the three heating coils 3, an operation portion P0 for setting the heating condition of the metal pot mounted on the pot mounting portion 21, and an exhaust opening H2. The exhaust opening H2 is an exhaust duct 59 of the grill chamber 5, which will be described later, and an outlet of an air passage originating from the intake opening H1, and is arranged behind the top plate 2 (on the right and left sides).

A door 6 for opening and closing the grill chamber 5 by sliding back and forth is arranged on the front left side of the main body 1.例文帳に追加Details of the door 6 will be described later. Also, on the front right side of the main body 1, an operation panel P2 for mainly setting the heating condition of the grill chamber 5 and a power switch P3 for turning on/off the main power are arranged.

The substrate case 8 is a case in which electrical components such as the substrate 7 are accommodated. A fan device 9 for cooling is provided on the back side of the substrate case 8, and sucks outside air from the intake opening H1 on the back of the main body 1, and the substrates 7 stacked in the substrate case 8 and arranged downstream thereof. It is configured to supply cooling air to the heating coil 3 that is heated.
<Composition of the grill chamber 5>
3 is a front cross-sectional view of the heating cooker Z cut along the line AA shown in FIG. 1, and FIG. 4 is a side cross-sectional view of the heating cooker Z cut along the BB line shown in FIG. It is a diagram. As shown in both figures, the grill chamber 5 of this embodiment includes a box-shaped heating chamber 50 provided at a front opening through which food 57 is taken in and out. The heating chamber 50 is constructed by, for example, assembling a plurality of members formed by pressing an aluminum alloy plate into a predetermined shape and assembling them with screws or the like.

In this heating chamber 50 , food 57 is stored in a deep-plate-like cooking pan 58 placed on a mesh base 54 and cooked. The cooking pan 58 is, for example, a deep plate made of a material such as aluminum and formed into a rectangular shape when viewed from the top, and the surface thereof is coated with a fluorine coating agent or the like.

In the heating chamber 50, an upper heater 51 and a lower heater 52 are installed so as to sandwich the cooking pan 58. By controlling the on/off of both heaters, the upper and lower surfaces of the food 57 in the cooking pan 58 can be heated at the same time. , or can be alternately heated. The upper heater 51 and the lower heater 52 are heat sources using radiant heat, such as sheathed heaters and electric heaters.

In this grilling chamber 5, a pair of door rails 56 provided on the left and right lower sides of the heating chamber 50 allows the door 6 for closing the front opening of the heating chamber 50 to slide in the front-rear direction. The width and height of the door 6 are greater than the front opening of the heating chamber 50, and the front side of the heating chamber 50 is provided with a vertically extending flange portion 50a (see FIG. 2). The front opening of the heating chamber 50 can be made airtight by bringing the flange portion 50a into contact with the flange portion 50a. A rubber packing or the like may be provided on the contact surface between the door 6 and the flange portion 50a to further improve the airtightness of the front opening of the heating chamber 50. FIG. In conjunction with the sliding of the door 6 using the door rail 56, the mesh base 54 on which the cooking pan 58 is placed also slides in the front-rear direction. Moreover, the door 6 is detachable, and when it becomes dirty, it can be removed from the grill chamber 5 and washed.

An exhaust duct 59 is provided above the back side of the heating chamber 50 to exhaust oily smoke, steam, etc., from the heating chamber 50, and the exhaust is exhausted from an exhaust opening H2 provided behind the top plate 2 (see FIG. 2). It has become. A catalyst 55 for removing smoke and deodorizing is provided in an exhaust duct 59 communicating with the exhaust opening H2.
<Configuration of door 6>
Next, the detailed structure of the door 6 of this embodiment will be described with reference to FIG. In the schematic diagram of FIG. 5, the distance between the rear surface of the door 6 and the front surface of the heating chamber 50 is expanded from the actual distance in order to illustrate the rising air current 98 generated at the boundary between the door 6 and the heating chamber 50. However, the actual distance between them is a gap of about 1 to 2 mm that remains due to the effect of airtight packing and the like.

As shown in both figures, the door 6 is a box formed by a front plate 60 and a door base 61 forming the front surface of the door 6, and a frame 62 forming the rear surface and the upper, lower, left and right surfaces of the door 6. A substantially flat plate-shaped internal space formed in the box can be used as the air passage 6a. The front plate 60 and the door base 61, which may come into contact with the user during cooking, are made of heat-resistant resin, and the frame 62 facing the high-temperature heating chamber 50 is made of thin metal plate such as stainless steel. Since the front plate 60 and the door base 61 are made of a resin material, any shape can be easily molded, so that the assembly and design of the door 6 can be easily improved.

A plurality of small-diameter holes 66b penetrate through a narrow area (for example, a rectangular area of about 2 to 3 cm in both vertical and horizontal directions) in the approximate center of the front plate 60 so that the inside of the heating chamber 50 can be visually recognized by the user. The upper end of the door base 61 is provided with a rib 61d for fixing the lower end of the front plate 60, and the front surface of the door base 61 is provided with a handle 61a that the user grips when opening and closing the door 6. is provided.

The frame 62 is formed into a box shape having a predetermined thickness in the front-rear direction, with the front side open and the rear side and the top, bottom, left, and right sides closed by bending the top, bottom, left, and right ends of a thin metal plate. Exhaust openings 62a are formed at the upper ends of the left and right sides of the frame 62, and air intake openings 62b are formed at the lower surface of the frame 62, which are the inlets of the air passage 6a. In order to improve the flow of air in the air passage 6a, it is desirable to increase the opening areas of the exhaust opening 62a and the intake opening 62b as much as possible.

Further, the frame 62 is provided with a window opening 62c of several centimeters in length and breadth at a position where the inside of the heating chamber 50 can be visually recognized, that is, at a position facing the small-diameter hole 66b of the front plate 60. As shown in FIG. By covering the window opening 62c with a heat-resistant glass plate 66a, air is prevented from entering and exiting between the air passage 6a of the door 6 and the heating chamber 50. As shown in FIG.

By using the door 6 composed of the front plate 60, the door base 61, the frame 62, and the glass plate 66a described above, the user can make the small-diameter hole 66b, the glass plate 66a, The situation inside the heating chamber 50 can be observed through the viewing window portion 66 consisting of three parts of the window opening 62c.

Here, the advantages of the structure in which the window opening 62c of the door 6 is made small will be described. It is known that the surface emissivity of glass is as high as 0.8 or more, while the surface emissivity of metal is as low as about 0.1 to 0.2. For this reason, in the configuration of this embodiment shown in FIGS. Compared to a configuration in which most of the front opening of the heating chamber is covered with a glass plate, forward heat radiation can be greatly suppressed. That is, according to the configuration of this embodiment, heat transfer from the frame 62 on the back of the door 6 to the front plate 60 on the front of the door 6 can be greatly suppressed, so the front plate 60 has a relatively low heat resistance temperature. A resin material can also be used.

However, even if the size of the glass plate 66a is reduced, the heat radiation from the glass plate 66a is sufficiently large. There is also a risk of burns if touched.

Therefore, in this embodiment, by continuously supplying low-temperature outside air into the air passage 6a of the door 6, the temperature rise of the front plate 60 can be suppressed. Hereinafter, a method of cooling the front plate 60 in the vicinity of the small-diameter hole 66b, which becomes particularly hot, intensively, and a method of cooling the front plate 60 as a whole will be described separately.

<Method for cooling the vicinity of the small-diameter hole 66b of the front plate 60>
As described above, since glass has a higher surface emissivity than metal, the front plate 60 locally has a higher temperature around the small-diameter hole 66b facing the glass plate 66a than the portion facing the metal surface of the frame 62. becomes. Therefore, in the present embodiment, the small-diameter hole 66b provided for visual recognition also has a function of sucking in low-temperature outside air, so that the front plate 60 heated by the radiant heat of the glass plate 66a can be efficiently cooled. there is

Although the details will be described later, the inside of the air passage 6a of the door 6 has a negative pressure because an air flow 99 is formed that flows from the lower intake opening 62b toward the upper exhaust opening 62a. Since the small-diameter hole 66b is provided in the middle of the airflow 99 rising in the air passage 6a, the low-temperature outside air in front of the front plate 60 is attracted into the air passage 6a through the small-diameter hole 66b. Heat is taken from the front plate 60 when passing through 66b. Therefore, in the configuration of this embodiment, the heat energy reaching the vicinity of the small-diameter hole 66b of the front plate 60 via the glass plate 66a can be directly cooled by the outside air passing through the small-diameter hole 66b. A temperature rise of the entire front plate 60 can be suppressed.

The small-diameter hole 66b may have any shape such as circular or rectangular. For example, a hole with a diameter of about 1 to 3 mm is less likely to be clogged with dust and has good visibility. In addition, it is desirable that the air inlet formed by the plurality of small-diameter holes 66b has a higher ventilation resistance than the air intake opening 62b so that the air flow 99, which is the main stream in the air passage 6a, can easily flow in the vertical direction.

<Overall Cooling Method for Front Plate 60>
Next, a method for cooling the front plate 60 as a whole will be described. First, the flow of air around the door 6 will be described.

In the induction heating cooker Z of this embodiment, as shown in FIG. 1, when the door 6 of the grill chamber 5 is closed, the front plate 60 and the operation panel P2 have a positional relationship in which the front position is substantially planar. ing. In other words, the door 6 slides in the front-rear direction and is fitted into the main body. For this reason, in order to smoothly open and close the door 6, it is necessary to provide a gap of at least about 1 to 3 mm on the top, bottom, left, and right of the door 6. FIG.

When cooking in the grill chamber 5 is started, the temperature of the air in the heating chamber 50 rises to 200° C. or higher by the upper heater 51 and the lower heater 52 heated to 500° C. or higher. The molded flange portion 50a and the frame 62 of the door 6 covering the front opening of the heating chamber 50 also reach a high temperature of 100° C. or higher. Since the frame 62 is made of metal with high thermal conductivity, it receives heat from the high-temperature air in the heating chamber 50 and heat via the flange portion 50a, and not only the plane on the heating chamber 50 side but also the left and right sides. The entire area including the sides becomes hot.

When both the flange portion 50a and the frame 62 become hot, the air in the gap between them and the air in the lateral gap of the frame 62 are warmed, and natural convection occurs due to the large temperature difference from the low-temperature outside air around the door 6. Due to the so-called chimney effect, an updraft 98 as shown in FIGS. 5 and 6 is generated.

As shown in FIG. 6, the frame 62 has an exhaust opening 62a communicating with the air passage 6a in the upper portion of the side surface thereof. Air is drawn outside through the exhaust opening 62a. In addition, an air intake opening 62b is provided below the door 6, and a plurality of small diameter holes 66b are provided in the front, so that the amount of air corresponding to the amount of air flowing out from the exhaust opening 62a is increased by the intake air. Air is supplied to the air passage 6a from the opening 62b and the small-diameter hole 66b. That is, when an ascending airflow 98 is generated on the side of the frame 62, an airflow 99 is generated in the air passage 6a toward the exhaust opening 62a from the intake opening 62b and the small-diameter hole 66b. is continuously taken in, and the entire front plate 60 is cooled.

Natural convection occurs to some extent due to the temperature difference between the front plate 60 and the frame 62, which are the front and rear wall surfaces of the air passage 6a. Therefore, it is difficult to generate sufficient airflow 99 for cooling the front plate 60 in the air passage 6a with a configuration that uses only the temperature difference between the frame 62 and the front plate 60. FIG.

On the other hand, in the configuration of this embodiment, the temperature difference between the flange portion 50a and the outside air is a factor that determines the strength of the rising air flow 98 around the frame 62. Therefore, if the temperature difference between the flange portion 50a and the outside air is large, , or as shown in FIG. 6, the front plate 60 can be lifted by the inducing action of the rising air current 98 without relying on the natural convection caused by the temperature difference between the front and back surfaces of the door 6. An air flow 99 sufficient for cooling can be generated in the air passage 6a.

Therefore, in this embodiment, the low-temperature outside air is efficiently drawn into the air passage 6a through the air intake opening 62b and the plurality of small-diameter holes 66b by the induction action of the exhaust opening 62a, and the front wall surface of the air passage 6a is formed. The plate 60 and the handle 61a of the door base 61 can be cooled.

<Grilling operation>
Next, cooling of the door 6 during actual grill cooking will be specifically described with reference to FIGS. 1 to 6. FIG. Here, a case where the food 57 placed on the cooking pan 58 of the heating chamber 50 is heated and cooked will be described as an example.

First, the user pulls the door 6 forward to open the front opening of the heating chamber 50, puts the cooking pan 58 with the food 57 placed thereon into the heating chamber 50, and then changes the cooking temperature and time using the operation panel P2. After setting or setting a preset automatic cooking menu, the cooking button on the operation panel P2 is pressed to start grill cooking. Then, when cooking starts, the upper heater 51 or the lower heater 52 is energized, and the food 57 is heated.

During heating, the wall surface temperature of the heating chamber 50 rises, and the temperature of the flange portion 50a of the heating chamber and the frame 62 of the door 6 also rises due to the hot air. This hot air creates a strong updraft 98 around the door 6 . The updraft 98 flows through the outer gap of the frame 62 . The frame 62 is provided with an exhaust opening 62a corresponding to a gap through which the ascending air current 98 flows, and a fast flow is generated in the vicinity of the exhaust opening 62a. As a result, the inside of the exhaust opening 62a (the air passage 6a) becomes negative pressure, and the ascending air current 98 induces the air in the air passage 6a to the outside. Therefore, the outside air is sucked through the intake opening 62b below the door base 61 and the small-diameter hole 66b of the front plate 60 by the induction action of the exhaust opening 62a, cooling the front plate 60, and exhausting the air through the air passage 6a. Air flows toward the opening 62a.

On the other hand, since the temperature of the frame 62 also gradually rises during cooking, natural convection due to the temperature difference gradually appears in the gap (air passage 6a) between the frame 62 and the front plate 60, and the intake opening 62b and the exhaust opening 62a are gradually generated. assist air flow 99 to The ascending airflow 98 and the airflow 99 caused by natural convection inside and outside the frame 62 generate a strong flow in the air passage 6a, and the temperature rise of the front plate 60 can be reduced. The front plate 60, which faces the glass plate 66a, which easily conducts heat by heat radiation, is provided with a small-diameter hole 66b for sucking outside air, thereby suppressing temperature rise.

That is, since the use of the heating chamber 50 causes the heating chamber 50 and the above-mentioned rising air current to be generated in association with each other, the temperature of the front plate 60 is difficult to rise unless the heating chamber 50 is at a high temperature, and the heating chamber 50 is at a high temperature. The temperature of the front plate 60 is lowered by the stronger ascending airflow 98 and airflow 99 .

Since these phenomena continue even after the completion of cooking in the heating chamber 50, the door 6 can be efficiently cooled.

As described above, according to the heating cooker of the present embodiment, a sufficient airflow 99 is generated in the air passage 6a of the door 6 by utilizing the ascending airflow 98 generated in the gap around the door 6. can be generated and the temperature of the front plate 60 can be efficiently cooled.

Next, the heating cooker of Example 2 is demonstrated. Duplicate descriptions of common points with the first embodiment will be omitted.

FIG. 7 is a diagram showing the door 6 of this embodiment, which differs from that of the first embodiment in the arrangement of the intake openings. That is, in this embodiment, the intake opening 61b is provided below the handle 61a in front of the door base 61. As shown in FIG.

As a result, the handle 61a can be effectively cooled by the flow of outside air toward the intake opening 61b. In addition, since the air intake opening 61b is provided near the base of the handle 61a, which is not visible to the user during normal use, the influence of the presence of the air intake opening 61b on the design of the heating cooker Z can be suppressed. Furthermore, since the air intake opening 61b is arranged so as to extend from the flange portion 50a, which becomes hot, outside air at a lower temperature is supplied to the air passage 6a compared to the configuration of the first embodiment in which the air intake opening 62b and the flange portion 50a are close to each other. be able to.

Next, the heating cooker of Example 3 is demonstrated. Duplicate descriptions of common points with the first embodiment will be omitted.

FIG. 8 is a perspective view of the front panel 60 of this embodiment, which differs from the first embodiment in that ribs 60b are provided on the rear surface of the front panel 60 to hold the glass plate 66a. That is, in this embodiment, when the front plate 60 made of heat-resistant resin is molded, the ribs 60b for holding the glass plate 66a are integrally molded. Also, since the rib 60b serves as a spacer between the front plate 60 and the frame 62, the strength of the door 6 as a whole is improved. Furthermore, when assembling the door 6, the position of the glass plate 66a and the window opening 62c of the frame 62 can be easily aligned, resulting in good workability.

Next, the heating cooker of Example 4 is demonstrated. Duplicate descriptions of common points with the first embodiment will be omitted.

FIG. 9 is a perspective view of the front panel 60 of this embodiment, which differs from the first embodiment in that a flat plate fin 60c is provided on the rear surface of the front panel 60 to increase the surface area. That is, in this embodiment, since a plurality of flat plate fins 60c extending in the vertical direction are provided on the back surface of the front plate 60, the low-temperature outside air flows as the airflow 99 in the air passage 6a from the lower air intake openings 62b to the upper air. Since heat can be exchanged efficiently while moving the exhaust opening 62a upward, the front plate 60 can be efficiently cooled compared to the first embodiment in which the flat plate fins 60c are not provided.

Although FIG. 9 illustrates the configuration in which the flat plate fins 60c are provided on the rear surface of the front plate 60, the surface area of the front plate 60 may be increased by providing a large number of pin fins on the rear surface of the front plate 60.

Next, the heating cooker of Example 5 is demonstrated. Duplicate descriptions of common points with the first embodiment will be omitted.

FIG. 10 is a diagram showing the door 6 of this embodiment, which is different from that of the first embodiment in that the front plate 60 and the door base are integrated, and that the viewing window portion 66 is moved to the upper right side. different. That is, according to the present embodiment, the visibility in the heating chamber 50 can be further improved, and the number of component parts of the door 6 can be reduced, thereby facilitating the assembly work.

The present invention is not limited to the embodiments described above, but includes various modifications. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the described configurations. In addition, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Also, other configurations can be added, deleted, or replaced with respect to the configuration of each embodiment.

1... body,
2 ... top plate,
3 ... heating coil,
5 ... grill storage,
6 door,
6a ... wind path,
7 ... substrate,
8... Board case,
50 ... heating chamber,
50a... flange portion,
50b... vent,
51 ... upper heater,
52 ... lower heater,
53... saucer,
54... Net stand,
57 food,
58 ... cooking bread,
59 ... exhaust duct,
60... Front plate,
60b... rib,
60c... flat plate fin,
61 ... door base,
61a ... handle,
61b ... intake opening,
61d ... rib,
62 Frame,
62a ... exhaust opening,
62b ... intake opening,
66 ... peephole,
66a ... glass plate,
66b ... small diameter hole,
98 ... updraft,
99 air flow

Claims (9)

A heating cooker comprising a pot rest on the upper surface of the main body and a grill chamber below the pot rest,
The grilling chamber includes a heating chamber having a heater for heating food, and a front-rearward movable door that closes the front opening of the heating chamber,
The door is a box body in which an air passage is formed between a resin front plate and a metal frame,
an intake opening serving as an entrance of the air passage provided at the bottom of the box;
an exhaust opening serving as an exit of the air passage provided in the upper part of the box;
a viewing window portion in which a window opening provided in the metal frame, a glass plate covering the window opening, and a plurality of small-diameter holes penetrating the resin front plate are arranged in a straight line;
A heating cooker characterized by comprising: In the heating cooker according to claim 1,
When the grilling chamber is in use, an upward air current generated near the door draws the air in the air passage to the outside through the exhaust opening, and through the intake opening and the plurality of small-diameter holes, A heating cooker, wherein outside air is taken into the air passage. In the heating cooker according to claim 1 or claim 2,
The exhaust opening is provided at the upper end of the side surface of the metal frame,
A heating cooker, wherein the intake opening is provided in the bottom surface of the metal frame. In the heating cooker according to claim 1 or claim 2,
The exhaust opening is provided at the upper end of the side surface of the metal frame,
A heating cooker, wherein the intake opening is provided below the handle portion on the front surface of the box. In the heating cooker according to claim 1 or claim 2,
A heating cooker, wherein a rib for supporting the glass plate is provided on the rear surface of the resin front plate. In the heating cooker according to claim 1 or claim 2,
A heating cooker, wherein fins for enlarging the surface area of the resin front plate are provided on the rear surface of the resin front plate. In the heating cooker according to claim 1 or claim 2,
The heating cooker, wherein the ventilation resistance of the small-diameter hole is greater than the ventilation resistance of the intake opening. In the heating cooker according to claim 1 or claim 2,
The heating cooker, wherein the observation window portion is rectangular with a length and width of about several centimeters. In the heating cooker according to claim 1 or claim 2,
The heating cooker, wherein the small diameter hole has a diameter of 1 mm to 3 mm.

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