JP6824065B2 - Cooker - Google Patents

Description

The present invention relates to a cooking device having a convection oven function.

As a conventional heating cooker, a fan that rotates on the rear side of the heating chamber by driving a motor, sucks the air in the heating chamber from the intake port and sends it into the heating chamber from the exhaust port, and the air sucked by the fan. Some are provided with a convection unit having a tube-shaped heating source for heating the air (see, for example, Patent Document 1).
Further, as a conventional convection unit, there is a unit including a glass tube heater and a line flow fan arranged below the glass tube heater (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2007-327676 Japanese Unexamined Patent Publication No. 2003-254537

By the way, instead of the line flow fan described in Patent Document 2 described above, a convection unit configured by applying the fan described in Patent Document 1 can be considered. In such a convection unit, the gap between the fan and the glass tube heater becomes narrow, so if the glass tube of the glass tube heater breaks for some reason and the glass tube comes into contact with the fan, the rotating fan There is a problem that the fragments of the glass tube are scattered.

The present invention has been made to solve the above-mentioned problems, and to provide a heating cooker in which the glass tube does not come into contact with the fan even if the glass tube of the glass tube heater is broken. With the goal.

In the heater according to the present invention, hot air is convoluted through a heater in which an object to be heated is stored, an intake port and an exhaust port provided on the wall of the heater, and an intake port and an exhaust port, and the inside of the heater is stored. A heating cooker having a convection unit that heats an object to be heated. The convection unit is a fan that rotates by driving a motor, sucks air in the heating chamber from an intake port, and sends it into the heating chamber from an exhaust port. A glass tube heater whose both ends are supported at a position above the fan to heat the air sucked from the intake port, and a plurality of guard members provided between the fan and the glass tube heater are provided. The guard members of the above are gaps between the fan and the glass tube heater, and are arranged side by side at intervals in the axial direction of the glass tube heater, and each of the plurality of guard members is arranged in the glass tube heater. It has a mounting part that is attached to the rear of the mounting part and an arm part that extends forward from the lower side of the mounting part and is arranged below the glass tube heater, and the arm part is bent upward and is more than a glass tube heater. It has a tip that is placed forward .

According to the present invention, since a plurality of guard members are provided between the fan and the glass tube heater, even if the glass tube is broken at any part of the glass tube heater, the broken glass tube is used as the guard member. Can be supported. As a result, the broken glass tube does not come into contact with the fan, and safety can be improved.

It is sectional drawing which looked at the side view of the cooking apparatus which concerns on embodiment of this invention. It is a perspective view of the convection unit of the cooking apparatus shown in FIG. It is a front view of the convection unit which shows the example of supporting the guard member when the glass tube heater of FIG. 2 is broken.

FIG. 1 is a cross-sectional view of the cooking cooker according to the embodiment of the present invention as viewed from the side, and FIG. 2 is a perspective view of a convection unit of the cooking cooker shown in FIG. Note that in FIG. 1, hatching showing a cross section is omitted in order to make the drawing easier to see.
The cooking cooker 100 according to the present embodiment is, for example, a microwave oven having an oven function. The appearance of the cooking cooker 100 is formed in a rectangular parallelepiped shape by a housing 1 and a door 3 that opens and closes an opening 2 provided on one surface of the housing 1. A rectangular parallelepiped-shaped heating chamber 11 having an opening having an opening having substantially the same size as the opening 2 is arranged in the housing 1.

The side plates 12 in the left-right direction of the heating chamber 11 are provided with a pair of support portions 13 projecting inward from each other. The pair of support portions 13 slidably support a ceramic square plate (not shown) on which an object to be heated is placed. The back plate 14, which is the wall of the heating chamber 11, is provided with an intake port 15 and an exhaust port 16 formed of a plurality of holes, respectively. The intake port 15 is provided at a position facing the fan 42, which will be described later. Although the exhaust port 16 is provided only on the upper side of the intake port 15, the exhaust port 16 may be provided above and below the intake port 15, respectively.

The bottom portion of the heating chamber 11 is formed of, for example, a ceramic plate 20 that transmits high frequencies and a bottom plate 19 provided on the outer peripheral portion of the ceramic plate 20. A flat heater 18 covered with a heater cover 18a is installed on the top plate 17 of the heating chamber 11. The flat heater 18 is configured, for example, by wiring a heating wire made of nichrome on almost the entire surface of an insulating material made of mica and covering the same member on the heating wire made of nichrome. The flat heater 18 generates heat when energized, and radiantly heats the object to be heated in the heating chamber 11 through the top plate 17.

A high-frequency shielding cover 31 in which the antenna 32 and the sheathed heater 33 are housed is attached to the lower surface of the ceramic plate 20 of the heating chamber 11. A waveguide 35 that propagates a high frequency oscillated from a magnetron (not shown) to the antenna 32 is connected to the high frequency shielding cover 31. An antenna motor 34 for rotating the antenna 32 is installed at the bottom of the housing 1 located below the waveguide 35. While rotating, the antenna 32 transmits the high frequency from the waveguide 35 through the ceramic plate 20 and radiates it into the heating chamber 11, and heats the object to be heated at the high frequency. The sheathed heater 33 is installed around the antenna 32 and is used for radiant heating the object to be heated from below and raising the ambient temperature in the heating chamber 11.

A convection unit 41 is arranged between the back plate 14 of the heating chamber 11 and the back plate 4 of the housing 1. As shown in FIG. 2, the convection unit 41 has a surface facing the back plate 14 of the heating chamber 11 opened, and is screwed to the back plate 14 of the heating chamber 11 via a flange 41c provided at the peripheral edge of the opening. Etc. (see Fig. 1). The top, bottom, left, right, and rear of the convection unit 41 are covered with a unit cover 51.

The convection unit 41 includes a fan 42, a glass tube heater 44 provided at a position above the fan 42, and, for example, two guard members 45 provided in a gap between the tip of the fan 42 and the glass tube heater 44. It has. Although the number of guard members 45 is two, three or four may be used. The fan 42 is attached to a rotating shaft 43 that penetrates the back plate 41a of the convection unit 41 and the back plate 51a of the unit cover 51. A pulley 46 is attached to one end of the rotating shaft 43, and the rotating shaft 43 is rotatably supported by bearing portions 41d and 51b provided on the back plate 41a of the convection unit 41 and the back plate 51a of the unit cover 51, respectively. There is.

A motor 47 for rotating the fan 42 is installed at the bottom of the housing 1 located below the convection unit 41. The motor 47 has a rotating shaft 48 to which a pulley 49 is attached at one end, and a belt (not shown) hung on the pulley 49 of the rotating shaft 48 and the pulley 49 attached to the rotating shaft 43 of the fan 42 (not shown). ) Is transmitted to the fan 42. In the present embodiment, the drive of the motor 47 is transmitted to the fan 42 via the belt, but the present invention is not limited to this. For example, a motor 47 may be installed between the back plate 51a of the unit cover 51 and the back plate 4 of the housing 1 to rotate the fan 42 without using a belt.

Both ends of the glass tube heater 44 are supported by penetrating the side plates 41b of the convection unit 41 and the side plates of the unit cover 51. In the glass tube heater 44, for example, a heating wire 44b wound in a coil shape is provided inside the glass tube, and electrodes 44a connected to the heating wire 44b are provided at both ends of the glass tube. When a current flows through the heating wire 44b by applying a voltage to the electrode 44a, far infrared rays are radiated from the glass tube to heat the air sucked from the intake port 15 by the fan 42.

The two guard members 45 include, for example, a plate-shaped mounting portion 45a formed in a quadrilateral shape and an arm portion 45b extending diagonally forward from one corner portion below the mounting portion 45a and projecting horizontally. It is configured. The tip of the arm 45b is bent upward. The two guard members 45 are arranged in the axial direction of the glass tube heater 44.

That is, the two guard members 45 are located inside the both ends of the fan 42 when the fan 42 is viewed from above, and the glass in the portion between each end of the glass tube heater 44 and the guard member 45. In the tube, when the glass tube near the guard member 45 is broken and lowered downward, the lowered glass tube is arranged at a position where it does not come into contact with the tip of the fan 42. Further, the two guard members 45 have their respective mounting portions 45a screwed on the back plate 41a of the convection unit 41 so that the arm portions 45b in the horizontal state are installed on the lower side of the glass tube heater 44 with a gap. It is fixed with. As shown in FIG. 1, the tips of the arms 45b of the two guard members 45 are in contact with the back plate 14 (corresponding to the wall according to claim 4) of the heating chamber 11.

In the cooking cooker 100 configured as described above, when the fan 42 is rotated by the drive of the motor 47, the air in the heating chamber 11 is sucked into the convection unit 41 through the intake port 15. The sucked air is heated by the glass tube heater 44 to become hot air, which is sent from the exhaust port 16 into the heating chamber 11. The hot air sent into the heating chamber 11 circulates in the heating chamber 11 and is sucked into the convection unit 41 through the intake port 15 while heating the object to be heated on the square plate supported by the support portion 13. In this way, the rotation of the fan 42 forms an air passage that circulates in the heating chamber 11 and the convection unit 41, and heats the object to be heated installed in the heating chamber 11 by hot air convection.

Next, the support of the guard member 45 with respect to the broken glass tube heater 44 will be described with reference to FIG.
FIG. 3 is a front view of the convection unit showing an example of supporting the guard member when the glass tube heater of FIG. 2 is broken.

As shown in FIG. 3, when the convection unit 41 is viewed from the front, the glass tube near the guard member 45 located on the left side of the glass tube heater 44 is broken, and the left end of the glass tube heater 44 is used as a fulcrum. When the broken glass tube is lowered downward, the guard member 45 located on the left side prevents the glass tube lowered downward from coming into contact with the tip of the fan 42. On the other hand, the glass tube of the glass tube heater 44 whose right end is supported is supported by the guard member 45 located on the left side of the two guard members 45.

When the glass tube between the two guard members 45 of the glass tube heater 44 is broken, the broken glass tube is supported by the guard member 45, although not shown. Further, when the glass tube at one end of both ends of the glass tube heater 44 is cracked and cracked, the glass tube of the glass tube heater 44 in which the other end is supported has the other end. As a fulcrum, it is supported by a guard member 45 near a broken glass tube.

As described above, according to the present embodiment, the two guard members 45 are located inside both ends of the fan 42 when the fan 42 is viewed from above, and the ends and guards at both ends of the glass tube heater 44. In the glass tube in the portion between the member 45 and the member 45, when the glass tube near the guard member 45 is broken and lowered downward, the lowered glass tube is arranged at a position where it does not come into contact with the tip of the fan 42.

With the two guard members 45 arranged in this way, even if the glass tube is broken at any part of the glass tube heater 44, the broken glass tube does not come into contact with the tip of the fan, which is safe. Can be improved.
Further, the tips of the arms 45b of the two guard members 45 are in contact with the back plate 14 of the heating chamber 11. As a result, the back plate 14 of the heating chamber 11 is heated and expanded, and even when the back plate 14 expands toward the convection unit 41 due to this expansion, the back plate 14 of the heating chamber 11 comes into contact with the convection unit 41. Can be prevented.

In the present embodiment, the back plate 14 of the heating chamber 11 is provided with an intake port 15 and an exhaust port 16, and a convection unit 41 is provided between the back plate 14 and the back plate 4 of the housing 1. However, it is not limited to this. For example, the intake port 15 and the exhaust port 16 may be provided on one side plate 12 which is the wall of the heating chamber 11, and the convection unit 41 may be provided between the side plate 12 and the side plate of the housing 1.

Further, in the present embodiment, one fan 42 is provided in the convection unit 41, but two fans 42 may be arranged in the axial direction of the glass tube heater 44. In this case, two guard members 45 are arranged at the positions as described above for each fan 42.

1 housing, 2 openings, 3 doors, 4 back plates, 11 heating cabinets, 12 side plates, 13 supports, 14 back plates, 15 intake ports, 16 exhaust ports, 17 top plates, 18 flat heaters, 18a heater covers, 19 bottom plate, 20 ceramic plate, 31 high frequency shielding cover, 32 antenna, 33 seeds heater, 34 antenna motor, 35 waveguide, 41 convection unit, 41a back plate, 41b side plate, 41c flange, 41d bearing, 42 fan, 43 Rotating shaft, 44 glass tube heater, 44a electrode, 44b heating wire, 45 guard member, 45a mounting part, 45b arm, 46 pulley, 47 fan motor, 48 rotating shaft, 49 pulley, 51 unit cover, 51a back plate, 51b Bearing part, 100 cooker.

Claims (4)

Hot air is convected through the heating chamber in which the heated object is stored, the intake port and the exhaust port provided on the wall of the heating chamber, and the intake port and the exhaust port to heat the heated object in the heating chamber. It is a heating cooker having a convection unit and
The convection unit is
A fan that rotates by driving a motor, sucks air in the heating chamber from the intake port, and sends it into the heating chamber from the exhaust port.
A glass tube heater whose both ends are supported at a position above the fan and which heats the air sucked from the intake port,
A plurality of guard members provided between the fan and the glass tube heater are provided.
The plurality of guard members are gaps between the fan and the glass tube heater, and are arranged side by side at intervals in the axial direction of the glass tube heater .
Each of the plurality of guard members
A mounting portion mounted behind the glass tube heater and
It has an arm portion that extends forward from the lower side of the mounting portion and is arranged below the glass tube heater.
A cooker characterized in that the arm portion is bent upward and has a tip arranged in front of the glass tube heater . The plurality of guard members are two, and the two guard members are located inside the both ends of the fan when the fan is viewed from above, and the ends of both ends of the glass tube heater and the guard. The claim is characterized in that, in the glass tube in the portion between the member and the member, when the glass tube near the guard member is broken and lowered downward, the lowered glass tube is arranged at a position where it does not come into contact with the fan. cooker placing serial to claim 1. The cooking cooker according to claim 1 or 2 , wherein the tip portions of the plurality of guard members are in contact with the wall of the heating chamber. The cooker according to any one of claims 1 to 3 , wherein two fans are arranged in the axial direction of the glass tube heater.

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