JPWO2020040096A1 - Cooker - Google Patents

Abstract

A heating cooker that sufficiently transmits the driving force to the rotating shaft of the stirring fan and does not leak water vapor and heat through the rotating shaft is realized. In the heating cooker, the through hole (30a) through which the rotation shaft (41) of the drive motor (40) for driving the convection fan (34) that blows air to the heating chamber (2a) penetrates is the heat shield panel (31). It is formed by fitting the burring (31a) and the burring (35a) of the convection panel (35).

Description

The present invention relates to a cooking device, and more particularly to a cooking device that cooks using steam.

As one of the cooking cookers, there is a cooking cooker that cooks using steam. In such a heating cooker, in order to utilize steam and heat without waste, it is necessary to prevent steam and heat in the heating chamber from leaking to the outside. Conventionally, various techniques for preventing water vapor and heat leakage have been proposed. For example, in Patent Document 1, a heating cooking apparatus that completely prevents water vapor and heat from leaking through the rotating shaft by magnetically coupling the rotating shaft of the stirring fan of the blower for stirring the water vapor in the heating chamber. Has been proposed.

Japanese Patent Publication "Japanese Patent Laid-Open No. 2001-355844"

However, in the conventional technique as described above, although it is possible to completely prevent water vapor and heat from leaking from the rotating shaft of the stirring fan to the outside of the refrigerator, the rotating shaft of the stirring fan of the blower is magnetically coupled, so that the stirring fan Compared to the case where the rotating shaft and the motor are directly connected, the driving force from the motor may not be sufficiently transmitted to the rotating shaft. Therefore, the steam and heat in the heating chamber cannot be sufficiently agitated, and cooking using the steam and heat may not be performed properly.

One aspect of the present invention is to realize a heating cooker having a configuration in which a driving force is sufficiently transmitted to a rotating shaft of a stirring fan and preventing water vapor and heat from leaking through the rotating shaft.

In order to solve the above problems, the heating cooker according to one aspect of the present invention is a heating cooker that cooks at least using steam, and is a wind for stirring the steam supplied into the heating chamber. A stirring blower fan, a drive motor that transmits a driving force to the stirring blower fan, a convection panel for arranging the stirring blower fan, and heat from the heating chamber for the drive motor. A heat shield panel for shutting off is provided, and the drive shaft of the drive motor is connected to the drive motor through a through hole penetrating the heat shield panel and the convection panel, and the through hole is connected to the drive motor. It is characterized in that the burrings formed on the convection panel and the heat shield panel are fitted to each other.

The heating cooker according to another aspect of the present invention is a cooking cooker that cooks using at least steam, and includes a stirring blower fan that sends out air for stirring the steam supplied into the heating chamber. A drive motor that transmits driving force to the stirring blower fan, a convection panel for arranging the stirring blower fan, and a heat shield panel for blocking heat from the heating chamber to the driving motor. The drive shaft of the drive motor is connected to the drive motor via a through hole penetrating the heat shield panel and the convection panel, and is driven to the drive motor side of the through hole. It is characterized in that a washer made of a heat-resistant resin is provided through which the shaft penetrates and covers the through hole.

According to one aspect of the present invention, it is possible to realize a cooking cooker having a configuration in which a driving force is sufficiently transmitted to the rotating shaft of the stirring fan and preventing water vapor and heat from leaking through the rotating shaft.

It is a front view of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a functional block diagram of the heating cooker shown in FIG. It is a figure which shows the state which removed the back panel of the heating cooker shown in FIG. It is a figure which shows the state which the left side panel is removed when viewed from the front of the cooking cooker shown in FIG. The heat shield panel provided on the back surface of the heating cooker shown in FIG. 3 is shown, (a) is a plan view, and (b) is a side view on the right side when viewed from the drive motor side. It is a rear view of the heat shield panel shown in FIG. FIG. 5 is a cross-sectional view taken along the line AA shown in FIG. 5A. It is an enlarged view of the main part which enlarged the main part of the cross-sectional view shown in FIG. 7. It is a front view of the heat shield panel which shows the state which fixed the Kapton washer to the heat shield panel. It is a rear view of the heat shield panel shown in FIG. It is schematic cross-sectional view for demonstrating the connection state of the convection panel and the heat shield panel in the heating cooker which concerns on Embodiment 2 of this invention. It is schematic cross-sectional view for demonstrating the connection state of the convection panel and the heat shield panel in the heating cooker which concerns on Embodiment 3 of this invention.

[Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail.

(Outline explanation of cooking cooker)
1A and 1B are front views of the cooking apparatus 1 of the present embodiment, in which FIG. 1A shows a state in which the door (opening / closing door) 3 is closed, and FIG. 1B shows a state in which the door 3 is opened. The cooking cooker 1 includes a microwave oven heating unit 12 (FIG. 2), an oven heating unit 13 (FIG. 2), and a steam generating unit 11 (FIG. 2), which will be described later. In particular, it is a heating cooker that performs water oven cooking using superheated steam heated to a temperature exceeding 100 ° C.

As shown in FIG. 1, the heating cooker 1 includes a rectangular parallelepiped casing 2 and a door 3, and the space surrounded by the casing 2 is a heating chamber 2a for accommodating an object to be heated. The magnetron is provided inside the casing 2 (for example, on the side opposite to the door 3 with the heating chamber 2a in between).

The door 3 is an opening / closing door for opening / closing the opening 2b of the heating chamber 2a, and is a window (window portion) 3a arranged at a position facing the heating chamber 2a and a frame (frame portion) 3b surrounding the window 3a. And. Heat-resistant glass or heat-resistant transparent resin is fitted in the window 3a so that the heating chamber 2a can be seen. The frame 3b is made of a non-metallic material, for example resin.

The door 3 is provided so that the heating chamber 2a can be opened and closed, rotates around the lower end side substantially, and a handle 4 is attached to the upper side as a user aid for opening and closing the door 3. In the present embodiment, the opening and closing of the door 3 is performed by rotating the side on the lower end side of the door 3 substantially as a center, but the present invention is not limited to this, and for example, the left end or right end side of the door 3 is opened and closed. The door 3 may be opened and closed by rotating around the center. Details of the door 3 will be described later.

Further, a shield material (not shown) having a size covering the opening 2b at the entrance of the heating chamber 2a is formed on the surface of the door 3 facing the heating chamber 2a.

The cooking cooker 1 further displays various information and the like related to the cooking cooker 1, and a display operation unit (instruction input unit) 5 for receiving a user's operation on the cooking cooker 1 is provided on the front surface of the door 3. It is provided. The display operation unit 5 is provided with a display panel 8 for displaying various information such as dials 6, buttons 7, and operation information. The display operation unit 5 may be configured as a touch panel, for example, without using physical members such as a dial 6 and a button 7. The display operation unit 5 is connected to a control unit 10 described later, and inputs / outputs information to / from the control unit 10. The cooking device 1 including the control unit 10 will be described below.

(Functional block of cooker 1)
FIG. 2 is a functional block diagram of the cooking device 1. As shown in FIG. 2, the cooking cooker 1 includes a control unit 10. The control unit 10 is connected to a display operation unit 5, a steam generation unit 11, a range heating unit 12, an oven heating unit 13, a cooling unit 14, an antenna rotation drive unit 15, a pump drive unit 16, and a temperature sensor 17. The control unit 10 includes a heating control unit 10a that mainly controls heating and cooking, and a display control unit 10b that controls the display of the display panel 8 of the display operation unit 5. Therefore, the heating control unit 10a includes the dial 6 and the button 7 of the display operation unit 5, the steam generation unit 11, the range heating unit 12, the oven heating unit 13, the cooling unit 14, the antenna rotation drive unit 15, the pump drive unit 16, and the temperature. It is connected to the sensor 17. On the other hand, the display control unit 10b is connected to the display panel 8 of the display operation unit 5.

The steam generating unit 11 is driven when cooking using superheated steam by the heating cooker 1, is supplied with water from a water supply tank (not shown), and heats the water to generate steam. The generated steam is supplied to the heating chamber 2a of the heating cooker 1. The steam generated by the steam generating unit 11 is superheated steam (steam having a temperature higher than 100 ° C.) or steam having a temperature lower than that. The temperature of steam can be adjusted as appropriate. Further, the steam supplied to the inside of the heating chamber 2a heats the food (heated object) arranged inside the heating chamber 2a.

The range heating unit 12 is a magnetron (microwave generator) when performing range cooking by the heating cooker 1, and the oven heating unit 13 is a heater when executing oven cooking by the heating cooker 1. The cooling unit 14 is a drive motor that drives a cooling fan (not shown) for cooling the electronic components in the heating cooker 1 when all the cooking is performed by the heating cooker 1.

The antenna rotation drive unit 15 rotates the antenna 18 that emits microwaves during microwave oven cooking.

When the steam generating unit 11 is operated, the pump driving unit 16 drives the pump 19 for supplying the water in the tank 20 to the steam generating unit 11.

The temperature sensor 17 is composed of, for example, a thermistor, and detects the temperature inside the heating chamber 2a. The control unit 10 controls the operation of the cooking device such as the steam generating unit 11 based on the setting in the display operation unit 5 and the detection temperature of the temperature sensor 17.

In the heating cooker 1 having the above configuration, in order to effectively perform steam cooking, it is necessary to convection (circulate) the steam supplied into the heating chamber 2a. The steam convection (circulation) mechanism will be described below.

(Water vapor convection (circulation) mechanism)
FIG. 3 shows a state in which the panel on the back side of the cooking cooker 1 is removed. FIG. 4 shows a state in which the panel on the left side when viewed from the front is removed in the state shown in FIG. (A) and (b) of FIG. 5 show the appearance of the steam convection (circulation) mechanism 30. FIG. 6 shows a state of the steam convection (circulation) mechanism 30 as viewed from the convection fan (stirring blower fan) 34 side. FIG. 7 shows a cross section taken along the line AA in FIG. 5 (a).

As shown in FIG. 3, the steam convection (circulation) mechanism 30 includes a convection fan 34 (FIG. 6) for sending air for steam convection (circulation) into the heating chamber 2a, a convection panel 35, and a convection fan 34. It is provided with a drive motor 40 for driving the water vapor.

The convection panel 35 is arranged between the convection fan 34 and the drive motor 40, and is attached so as to substantially cover the back surface of the cooking cooker 1. By rotating the convection fan 34, air is blown into the heating chamber 2a from the back side of the cooking cooker 1.

The drive motor 40 is attached to the heat shield panel 31 via the attachment plate 32. The heat shield panel 31 blocks the heat from the heating cabinet 2a of the cooking cooker 1 from being transferred to the driving motor 40.

Further, in order to cool the drive motor 40, a cooling fan 33 is provided on the rotating shaft 41 of the drive motor 40. The cooling fan 33 is provided between the drive motor 40 and the heat shield panel 31, and is adapted to blow wind toward the drive motor 40 by rotating in conjunction with the rotation of the convection fan 34. ..

As shown in FIG. 7, the heat shield panel 31 and the convection panel 35 are arranged at predetermined intervals and function as a heat insulating layer. The space formed by the back surface of the heating chamber 2a and the convection panel 35 is used as a convection duct.

By the way, since the rotary shaft 41 of the drive motor 40 penetrates the heat shield panel 31 and the convection panel 35, water vapor or heat from the heating chamber 2a side may leak to the outside through the rotary shaft 41. Therefore, in the following, a water vapor leakage prevention mechanism for preventing water vapor leakage will be described.

(Water vapor leakage prevention mechanism)
FIG. 8 shows a cross section of the steam convection (circulation) mechanism 30 near the drive motor 40 and the rotating shaft 41. 9 is a front view of the heat shield panel 31, and FIG. 10 is a rear view of the heat shield panel 31.

As shown in FIG. 8A, the steam convection (circulation) mechanism 30 has a cooling fan 33, a heat shield panel 31, a convection panel 35, a convection heater 39, and a convection fan 34 in this order from the drive motor 40 side. It is installed.

The rotating shaft 41 of the drive motor 40 is connected to the convection fan 34 through the through hole 30a penetrating the heat shield panel 31 and the convection panel 35, while being connected to the cooling fan 33 in front of the through hole 30a. As shown in FIG. 8B, the through hole 30a is formed by fitting the burrings 35a and 31a formed on the convection panel 35 and the heat shield panel 31, respectively. Further, in the present embodiment, an example is shown in which the inner diameter of the burring 31a of the heat shield panel 31 forming the through hole 30a is larger than the outer diameter of the burring 35a of the convection panel 35.

Specifically, the cooling fan 33 is fixed to the rotating shaft 41 by the washer 43 and the e-ring 44, and the convection fan 34 is fixed to the rotating shaft 41 by the washer 37 and the nut 38. A collar 42 penetrating the rotating shaft 41 is provided between the cooling fan 33 and the convection fan 34. The collar 42 penetrates through the through hole 30a.

According to the above configuration, in the through hole 30a of the steam convection (circulation) mechanism 30, as shown in FIG. 8B, the heat shield panel 31 and the convection panel 35 are fitted with burrings 31a and 35a, respectively. Since the heat shield panel 31 is formed in a hurry, the gap formed between the heat shield panel 31 and the convection panel 35 is sealed by the burrings 31a and 35a. Therefore, even if water vapor or heat from the convection panel 35 side (heating chamber 2a side) reaches the through hole 30a through the rotating shaft 41, the space formed between the heat shield panel 31 and the convection panel 35 It cannot escape to the outside of the heating cooker 1.

Moreover, since the rotating shaft 41 of the drive motor 40 is directly connected to the convection fan 34, the driving force of the drive motor 40 can be sufficiently transmitted to the convection fan 34.

Therefore, the heating cooker 1 having the above configuration has a configuration in which the driving force is sufficiently transmitted to the rotating shaft 41 of the convection fan 34, and the outer diameter of the collar 42 (including the rotating shaft 41) and the inner diameter of the burring 35a are substantially equal to each other. This is a configuration that can prevent water vapor and heat from leaking through the rotating shaft 41.

Further, as shown in FIG. 8B, a heat-resistant washer (washer) 36 made of a heat-resistant resin through which the rotating shaft 41 penetrates and covers the through hole 30a is provided on the drive motor 40 side of the through hole 30a. ing. Specifically, a collar 42 (including the rotating shaft 41) penetrates the rotating shaft 41 side of the through hole 30a, and a heat-resistant washer 36 made of a heat-resistant resin covering the through hole 30a is provided to provide a collar. Even if the outer diameter of the 42 (including the rotating shaft 41) and the inner diameter of the burring 35a are not substantially equal, it is possible to prevent water vapor and heat from leaking from the gap between the rotating shaft 41 and the through hole 30a.

As the heat-resistant washer 36, a highly heat-resistant resin having a heat-resistant temperature (300 ° C.) such as polyimide is used as a material. Specifically, a Kapton (registered trademark) washer is used as the heat-resistant washer 36.

In the present embodiment, an example in which the inner diameter of the burring 31a of the heat shield panel 31 constituting the through hole 30a is larger than the outer diameter of the burring 35a of the convection panel 35 has been described, but the present invention is limited to this. Instead, the outer diameter of the burring 31a of the heat shield panel 31 may be smaller than the inner diameter of the burring 35a of the convection panel 35. The point is that the burring 31a of the heat shield panel 31 and the burring 35a of the convection panel 35 are fitted together so that water vapor and heat do not escape from the gap formed between the heat shield panel 31 and the convection panel 35. good.

(Heat-resistant washer)
The heat-resistant washer 36 will be described below with reference to FIGS. 9 and 10.

As shown in FIG. 9, the heat-resistant washer 36 has a through hole 36a formed in the center having a diameter substantially the same as the outer shape of the collar 42, and is said to be formed on a surface of the heat shield panel 31 opposite to the burring 31a forming surface. It is supported by four support members 51 formed on the heat shield panel 31. That is, the heat-resistant washer 36 is movably supported by the four support members 51 formed on the heat shield panel 31 within a predetermined range with respect to the heat shield panel 31.

According to the above configuration, since the heat-resistant washer 36 is movably supported within a predetermined range by the four support members 51, the heat-resistant washer 36 fluctuates within the through hole 30a of the rotation shaft 41 of the drive motor 40 (rotation shaft). It can follow the vibration caused by the eccentricity of 41). As a result, even if the rotating shaft 41 fluctuates in the through hole 30a, it is possible to suppress the generation of abnormal noise due to interference with the heat-resistant washer 36, and a gap is formed between the through hole 30a and the rotating shaft 41. Since it does not occur, leakage of water vapor and heat can be reliably suppressed. Further, since the rotating shaft 41 does not come into direct contact with the through hole 30a, no abnormal noise is generated due to the rotating shaft 41 coming into contact with the through hole 30a.

The heat-resistant washer 36 may be any resin as long as it is made of a resin having high heat resistance such as polyimide. That is, the heat-resistant washer 36 preferably has heat resistance and flexibility. Utilizing this flexibility, the heat-resistant washer 36 can be attached to and detached from the support member 51. That is, when the heat-resistant washer 36 is supported by the support member 51, the heat-resistant washer 36 is slightly bent with a finger and inserted into the gap between the support members 51, and the fingers are released. On the other hand, when removing the heat-resistant washer 36 supported by the support member 51, the heat-resistant washer 36 is taken out from the gap between the support members 51 while being slightly bent with a finger.

As described above, since the heat-resistant washer 36 is made flexible and can be freely moved within a predetermined range when supported by the support member 51, the heat-resistant washer 36 can be easily attached and detached as described above. Become. The number of support members 51 that support the heat-resistant washer 36 is not limited to four, and may be at least three or more.

[Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated.

In the first embodiment, in order to prevent water vapor and heat from leaking, the burring 31a formed on the heat shield panel 31 and the burring 35a formed on the convection panel 35 are fitted together and penetrate the heat-resistant washer 36. An example provided in the hole 30a has been described. As shown in FIG. 11, from FIG. 8B, even if there is no heat-resistant washer 36, that is, a configuration having only burring 31a and 35a, at least a heat shield panel is provided. It has the effect of preventing water vapor and heat from leaking from the gap formed between the 31 and the convection panel 35.

[Embodiment 3]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated.

In the second embodiment, the configuration without the heat-resistant washer 36, that is, the configuration with only burring has been described with respect to the first embodiment, but as shown in FIG. 12, the configuration with only the heat-resistant washer 36, that is, the heat shield panel. Even if the burring 31a is not formed on the 31 and the burring 35a is not formed on the convection panel 35, water vapor and heat leak into the gap formed between the heat shield panel 31 and the convection panel 35. It has the effect of preventing water vapor and heat from leaking from the through hole 30a.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1 Heat cooker 2 Casing 2a Heating cabinet 2b Opening 3 Door 3b Frame 4 Handle 5 Display operation unit 6 Dial 7 Button 8 Display panel 10 Control unit 10a Heating control unit 10b Display control unit 11 Steam generation unit 12 Range heating unit 13 Oven Heating unit 14 Cooling unit 15 Antenna rotation drive unit 16 Pump drive unit 17 Temperature sensor 18 Antenna 19 Pump 20 Tank 30 Steam convection (circulation) mechanism 30a Through hole 31 Heat shield panel 31a Burling 33 Cooling fan 34 Convection fan (blower fan)
35 Convection panel 35a Burling 36 Heat resistant washer 36a Through hole 37 Washer 38 Nut 39 Convection heater 40 Drive motor 41 Rotating shaft (drive shaft)
42 Color 43 Washer 44 e-ring 51 Support member

Claims (5)

It is a cooking device that cooks with at least steam.
A blower fan for convection of water vapor supplied in the heating chamber,
A drive motor that transmits the driving force to the blower fan,
With the convection panel for arranging the above blower fan,
A heat shield panel for blocking heat from the heating chamber to the drive motor, and
With
The drive shaft of the drive motor is connected to the blower fan through a through hole penetrating the heat shield panel and the convection panel.
The through hole is a heating cooker characterized in that the burrings formed in the convection panel and the heat shield panel are fitted to each other. The heating cooker according to claim 1, wherein a washer is provided on the drive motor side of the through hole through which the drive shaft penetrates and covers the through hole. The cooker according to claim 2, wherein the washer contains polyimide. The cooker according to claim 2 or 3, wherein the washer is flexible. The heating according to claim 4, wherein the washer is movably supported by at least three support portions formed on the heat shield panel with respect to the heat shield panel within a predetermined range. Cooking device.

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