JP2018100817A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker which can take heat countermeasures of a motor and can be disposed with a back surface of the heating cooker contacting with a wall.SOLUTION: A heating cooker includes an infrared sensor. A hot air unit located behind a heating chamber 28 is provided with: a heater 14 which heats air; a fan which blows the air to the heating chamber 28 to circulate the air; a cover 11a forming an air channel for circulating the air; a motor 13 which rotates the fan from an area behind the hot air cover 11a; and a partition plate to which the motor 13 is fixed. The heating cooker includes a rear plate 10 forming the rear side of a body 1 and includes an air channel part which blows cooling air behind the rear plate 10. A cooling device 150 which suctions cooling air from the lower side is provided at the air channel part.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a heating cooker.

  As a background technology in this technical field, in recent years, the trend toward luxury has increased, and the adoption of a hot air system (convection oven) as a heat source during oven heating in a cooking device has increased, and the maximum temperature during heating is as high as 300 ° C. It is requested.

  The hot-air heating cooker has been around for a long time. For example, Patent Document 1 shown below also has a hot-air unit provided behind the inner surface of the heating chamber, and circulates air between the heating chamber and the hot-air unit. The heated object is heated by heating the air to be heated with a hot air heater. The air is circulated by a hot air motor in which a hot air fan provided substantially at the center of the hot air unit is disposed behind the hot air unit.

  In order to set the maximum temperature at the time of heating to 300 ° C., it is necessary to take measures against the hot air motor disposed behind the hot air unit and measures against the heat of the outer body. As a heat countermeasure for the hot air motor, a cooling duct is provided between the hot air unit and the rear plate so that the low temperature cooling air can be blown directly from the fan device that blows the cooling air to the hot air motor. As a heat countermeasure, cooling air is passed between the hot air unit and the rear plate. In order to blow cooling air over the entire main body and blow cooling air through the cooling duct, a turbo fan capable of blowing high-pressure air is adopted for the fan device.

JP 2009-8298 A

  When diversifying products in consideration of the installation space, it is necessary to incorporate the above-mentioned specifications into a cooking device with a small outer shape. However, since the turbo fan that can blow out the high-pressure air mentioned above cannot be installed in the main body, the temperature of the back plate (rear surface) of the heating cooker becomes high due to the problems that the hot air motor cannot take measures for heat and the heat of the hot air unit. There was a problem that could not be installed in contact with the wall behind. Thereby, when the clearance gap between a wall and a heating cooker was opened widely, the subject which cannot install a heating cooker on the general shelf arrange | positioned in the kitchen occurred.

  The present invention has been made in order to solve the above-described problem, and includes a heating chamber that puts an object to be heated in a main body, an infrared sensor that detects the temperature of the object to be heated above the heating chamber, and the heating A hot air unit for heating the object to be heated is provided on the rear side of the chamber, and the hot air unit includes a heater for heating air, a fan for blowing and circulating the air heated by the heater into the heating chamber, A cover that constitutes an air passage for circulating air, a motor that rotates the fan from the rear of the cover, and a partition plate that fixes the motor are provided, and a rear plate that constitutes the main body is provided behind the hot air unit. An air passage portion for sending cooling air is provided behind the rear plate, and a cooling device for sucking the cooling air from below is provided in the air passage portion.

  According to the present invention, it is possible to take measures against heat of the motor, and to arrange the heating cooker with the back surface in contact with the wall.

The front perspective view of the heating cooker which concerns on the Example of this invention. The front perspective view of the state where a part of outer frame of the heating cooker was cut off. Cross-sectional explanatory drawing of the infrared sensor unit with which the heating chamber of the same heating cooker is equipped. The disassembled perspective view of the heating chamber of the heating cooker, a hot air unit, and a backplate. Sectional drawing of the principal part of the heating cooker. The perspective view which combined the cooling duct and external exhaust duct of the heating cooker. The disassembled perspective view of the cooling duct and external exhaust duct of the heating cooker. Sectional drawing of the heating cooker. The rear perspective view of the heating cooker.

  As shown in FIGS. 1 and 2, the main body 1 of the heating cooker includes a door unit A and a heating unit K.

  The door unit A includes a handle 9, a glass window 3, an operation unit 6, a display unit 5, an operation board (not shown), and the door 2. A glass window 3 is provided at the center of the door 2, a handle 9 is provided at the top, and an operation unit 6 and a display unit 5 are provided at the bottom.

  The handle 9 is for opening and closing the door unit A and is easy to grip. The glass window 3 is for confirming the heating state of an object to be heated put in a heating chamber 28 described later. The operation unit 6 indicates a button, a touch panel, or a dial for a user to input an operation. The display unit 5 is for displaying the input of the operation unit 6 and the heating state. The operation board is connected to a control board (described later) provided in the heating unit K, and receives an input from the operation unit 6 and displays it on the display unit 5. The door 2 forms a glass door in a shape surrounding the periphery of the glass window 3 and comes into contact with a heating chamber 28 (to be described later) of the heating unit K, and serves to confine the heat in the heating chamber 28 so that it can be efficiently heated. .

  The heating unit K includes a heating chamber 28, a cabinet 7, a rear plate 10, a bottom plate 21, a machine room 20, a cooling duct 16, a first cooling device 150, and an external exhaust duct 18.

  The heating chamber 28 is for heating an object to be heated (food) inside. On the side surface of the heating chamber 28, there is a shelf 28t for placing an oven dish. The heating chamber inner surface 28b of the heating chamber 28 has a hot air intake hole 31 and a hot air blowing hole 30 for circulating air from the hot air unit 11 described later. A rear portion of the heating chamber top surface 28c of the heating chamber 28 has a window portion 28m that is an opening for detection by an infrared sensor unit 50 described later.

  The cabinet 7, the rear plate 10, and the bottom plate 21 that form the outer shell form the outer shell of the heating unit K of the main body 1. The heating chamber 28 is disposed in front of the rear plate 10 constituting the rear shell, the bottom plate 21 is disposed below the heating chamber 28, and the side and upper side of the heating chamber 28 are covered with the cabinet 7. As shown in FIG. 8, the machine room 20 indicates a space between the cabinet 7, the rear plate 10, the bottom plate 21 and the heating chamber 28. The machine room 20 includes a control board (not shown), an infrared sensor unit 50, an upper heater unit 12, a hot air unit 11, and a second cooling device (not shown).

  The control means mounted on the control board is connected to the upper heater unit 12, the hot air unit 11, the second cooling device, and the first cooling device 150, and controls an output suitable for heating. The said control means is connected with the operation board, receives the input from the operation part 6, and reflects it in control. The control means is connected to the temperature sensor 80 and the infrared sensor unit 50, and controls the optimum heating by feeding back the state of the object to be heated and the state in the heating chamber 28 to the heating control.

  A temperature sensor 80 using the thermistor in FIG. 5 is provided at the rear of the heating chamber top surface 28 c of the heating chamber 28 and detects the temperature in the heating chamber 28. The infrared sensor unit 50 is provided behind the heating chamber top surface 28c of the heating chamber 28 and detects the surface temperature of the object to be heated (food) in a non-contact manner. As shown in FIG. 3, the infrared sensor unit 50 is provided with a shutter structure 51 to open and close a window 28m provided on the heating chamber top surface 28c. When the infrared sensor 50a does not measure, the window portion 28m is closed with the shutter structure, and the window portion 28m is opened with the shutter structure 51 only when measurement is performed, so that scattered matter of the object to be heated (food) generated in the heating chamber 28 can be obtained. This prevents the infrared sensor 50a from sticking to the infrared sensor 50a.

  The upper heater unit 12 is installed on the outer surface side of the heating chamber top surface 28c, and heats the upper surface of the object to be heated (food) from the heating chamber top surface 28c with radiant heat.

  As shown in FIG. 4, the hot air unit 11 includes a hot air cover 11 a, a motor base B, a hot air heater 14, a heat insulating mat D, a hot air motor 13, and a fan 32.

  Specifically, the hot air unit 11 is provided on the machine chamber 20 side of the heating chamber inner surface 28 b of the heating chamber 28. Air is heated by the hot air heater 14 of the hot air unit 11, and the heated air is blown from the hot air blowing hole 30 to the heating chamber 28 by the fan 32 provided in the hot air motor 13, and the air in the hot heating chamber 28 is blown into the wind intake hole. The object to be heated (food) is heated by convection heat transfer by sucking from 31 and reheating and blowing air from the hot air blowing hole 30 to the heating chamber 28.

  The air passage for sucking the air in the heating chamber 28 from the hot air intake hole 31 and circulating the air fed into the heating chamber 28 from the hot air ejection hole 30 is formed between the heating chamber inner surface 28b and the hot air cover 11a. . The hot air cover 11a heats the air circulating in the vicinity of the hot air blowing hole 30 and a fan 32 driven by a hot air motor 13 (to be described later) that sucks air from the heating chamber 28 through the hot air intake hole 31 and circulates the air. A hot air heater 14 is provided.

  The motor base B is held on the rear surface of the hot air cover 11a. The holding method is to fix the hot air cover 11a and the motor base B to the throttle part 11e with a small contact area, reduce the heat transfer of the hot air cover 11a to the motor base B, and fix the hot air motor 13 to the rear surface of the motor base B. doing.

  The heat insulating mat D is disposed in contact with the machine room 20 side of the hot air cover 11a to prevent the heat of the air heated by the hot air heater 14 from being transferred to the rear plate 10 side.

  As shown in FIG. 5, the shaft 13a of the hot air motor 13 passes through a hole provided in the motor base B, passes through the shaft hole 11b of the hot air cover 11a, and penetrates to the heating chamber 28 side, thereby heating the hot air cover 11a. A fan 32 is fixed to the front end facing the chamber 28 side. The hot air motor 13 drives the fan 32.

  The motor base B is a partition plate that partitions the air path through which the cooling air 39a and the cooling air 39b flow, and is also a partition plate that blocks a motor protruding hole 10a described later. The motor base B, which is a partition plate, has a substantially quadrangular shape and has partitioning portions B1 projecting toward the rear plate 10 on four sides. The partitioning portion B1 is formed on the front surface of the outer periphery of the motor projecting hole 10a provided at the substantially central portion of the rear plate 10. The abutting partition B1 and the rear plate 10 are connected in a substantially sealed manner to suppress air leakage from the outer periphery of the partition B1.

  The hot air motor 13 protrudes from the motor protrusion hole 10 a of the rear plate 10 to the outside of the rear plate 10.

  A notch B2 is provided on one side of the partition B1 of the motor base B, and an electric wire of the hot air motor 13 passes through the notch B2. The hot air motor 13 is connected to the control means.

  The second cooling device is disposed in the machine room 20 below the heating chamber 28, and sucks air from the main body air intake hole 10f of the rear plate 10 or the hole (not shown) of the bottom plate 21, and is mounted on the control board. Cooling air 39b is blown and cooled focusing on parts with low heat resistance in the machine room 20.

  The temperature above the hot air unit 11 is high. The cooling duct 16 and the external exhaust duct 18 of FIG. 6 are provided on the rear plate 10. The positions of the hot air heater 14 provided on the upper side of the hot air unit 11 are in the vicinity of the substantially central portion of the hot air heater 14 and in the vicinity of the substantially central portion of the hot air heater 14 provided on the lower side and on the hot air cover 11a through the shaft 13a of the hot air motor 13. It is installed so as to cover the vicinity of the provided through hole 11b. The external exhaust duct 18 is provided so as to substantially cover the upper side of the hot air unit 11.

  As shown in FIG. 9, the cooling duct 16 and the external exhaust duct 18 are formed in a substantially Y shape when the main body 1 is viewed from the rear side. As shown in FIG. 7, the cooling duct 16 has an outer intake hole 16 b for taking in air directly from the outside of the main body 1 at the lower part. The cooling duct 16 is open at the top, and is connected to the external exhaust duct 18 at the joint 16m and the joint 18m, and is joined by a screw at the screw receiving portion 16n and the screw portion 18n.

  As shown in FIG. 6, the lower air passage portion 16 a of the cooling duct 16 and the upper air passage portion 18 a of the external exhaust duct 18 constitute an air passage portion F, and the hot air motor 13 exposed inside the air passage portion F is cooled. Then, the infrared sensor unit 50 is cooled by the cooling air 39a that has passed through the air passage portion F. Since one surface of the air passage portion F is constituted by the rear plate 10, the rear plate 10 and the partition plate (the motor base B) that closes the motor protruding hole 10a provided in the rear plate 10 are also cooled at the same time. Since the partition plate (motor base B) can be cooled, the heat from the hot air unit 11 can be poorly transmitted to the hot air motor 13, so that the hot air motor 13 is efficiently cooled.

  In the present embodiment, the structure of the air passage portion F is configured to cool the infrared sensor unit 50 with the cooling air after the hot air motor 13 is cooled. However, the air passage portion F is divided into two air passages and the hot air motor is divided. 13 may be divided into an air path for cooling and an air path through which cooling air for cooling the infrared sensor unit 50 flows. Only one of the hot air motor 13 and the infrared sensor unit 50 may be cooled.

  As shown in FIG. 7, partitioned air insulation layers 16 s are provided on the left and right sides of the lower air passage portion 16 a of the cooling duct 16. Further, an air layer (air heat insulating layer 16s) is provided between the double side walls so that the cooling air 39a flowing through the lower air passage portion 16a (air passage portion F) does not easily escape to the left and right. Furthermore, since the cooling duct 16 is substantially rectangular in the horizontal cross section, the outer surface is inclined in consideration of the design of the back surface of the main body 1.

  An outer intake hole 16b is provided in the lower portion of the lower air passage portion 16a, and a first cooling device 150 is provided in the lower portion of the lower air passage portion 16a. The first cooling device 150 takes in air from the outer intake hole 16b, and the cooling air 39a To blow.

  The cooling duct 16 is provided so as to cover the motor projecting hole 10a provided at the substantially central portion of the rear plate 10 and the hot air motor 13 projecting outward from the motor projecting hole 10a to form the lower air passage 16a.

  The first cooling device 150 causes the cooling air 39 a to flow in the air passage portion F formed by the cooling duct 16 and the external exhaust duct 18, cools the hot air motor 13 accommodated in the cooling duct 16, and The infrared sensor unit 50 provided in the rear part of the heating chamber top surface 28c is cooled.

  The external exhaust duct 18 has an external exhaust port 8 through which the exhaust from the heating chamber 28 and the machine chamber 20 passes to the outside of the main body 1. An air passage portion F is formed by the upper air passage portion 18a and the left and right exhaust portions 18c. The air path portion F is partitioned from the upper flow path 18g.

  The exhaust part 18c is provided with an exhaust receiving part 18c2 on the right side and an exhaust part discharge part 18c1 on the left side when the main body 1 is viewed from the front. The right exhaust receiving part 18c2 and the exhaust part discharging part 18c1 are connected by an upper flow path 18g.

  The exhaust receiving portion 18c2 is a portion that receives exhaust heat exhausted from a heating chamber 28 described later. The exhaust from the heating chamber 28 is exhausted directly from the heating chamber 28 and is at a high temperature. When exhausted upward, the temperature is high, so the air flows from the lower part of the closed part 18d through the upper flow path 18g to the exhaust part discharge part 18c1, and is exhausted together with the cooling air 39b of the machine room 20 from the external exhaust hole 18b.

  The rear plate 10 may be provided with a duct inlet hole 10b for allowing the cooling duct 16 to suck air into the cooling air 39a.

  The rear plate 10 has a duct exhaust hole 10c through which the cooling air 39a for cooling the infrared sensor unit 50 flows through the upper air passage 18a of the external exhaust duct 18 connected to the substantially upper center.

  The rear plate 10 has a heating chamber exhaust hole 10d for exhausting air from the heating chamber 28 on the upper right side. The exhaust from the heating chamber exhaust hole 10d is received by the exhaust receiving portion 18c2 on the right side of the external exhaust duct 18. It flows from the exhaust receiving part 18c2 through the upper flow path 18g to the exhaust part discharging part 18c1, and is exhausted from the external exhaust hole 18b.

  The rear plate 10 has a machine room exhaust hole 10e for exhausting air from the machine room 20 on the upper left side. The exhaust from the machine room exhaust hole 10e is received by the exhaust part exhaust part 18c1 on the left side of the external exhaust duct 18 and exhausted from the external exhaust hole 18b.

  The cooling air 39a that has cooled the infrared sensor unit 50 turns to the rear plate 10 side in the machine chamber 20 above the heating chamber 28, and exhausts from the machine chamber exhaust hole 10e of the rear plate 10 to the exhaust portion discharge portion 18c1 of the external exhaust duct 18. And exhausted from the external exhaust hole 18b.

  According to the above embodiment, even in a small heating cooker, the maximum temperature during heating is 300 ° C., it is possible to adopt a hot air system as a heat source, and the rear surface of the heating cooker can be arranged in contact with the wall. .

  A duct inlet hole 10 b may be provided in the rear plate 10, and air may be sent to the cooling duct 16 from a second cooling device provided in the machine room 20. In that case, the outer intake hole 16b below the cooling duct 16 may be eliminated. The temperature of the rear surface of the main body 1 that comes into contact with the wall at the time of installation can be lowered by arranging the air passage portion F for flowing the cooling air on the outside (rear) of the rear plate 10 of the main body 1.

  Since the depth dimension of the cabinet 7 on the left and right sides does not include the depth dimension of the cooling duct 16, it is possible to improve the design so that the user does not feel the depth of the main body 1 when the main body 1 is viewed obliquely from the front. it can.

  The external exhaust duct 18 is a part that requires high heat resistance, and the cooling duct 16 is a part that does not require high heat resistance, and the material is divided according to the heat resistance needs of individual parts, so that it does not become excessive performance. Thus, the cost can be reduced.

  Even when the rear surface of the cooling duct 16, which is the rearmost surface of the main body 1, is installed close to the wall behind the installation location, spaces are formed on the left and right behind the cooling duct 16, and the main body intake holes 10 f of the rear plate 10 The air intake space can be secured around the outer intake hole 16b of the cooling duct 16, and the main body 1 can be cooled.

10 Rear plate 10a Motor projection hole 11 Hot air unit 11a Hot air cover 13 Hot air motor 14 Hot air heater 16 Cooling duct 28 Heating chamber 28b Heating chamber inner surface 32 Fan 150 First cooling device B Motor stand B1 Screening section

Claims (2)

It has a heating chamber that puts the object to be heated in
An infrared sensor for detecting the temperature of the object to be heated is provided above the heating chamber,
A hot air unit for heating the object to be heated is provided behind the inner surface of the heating chamber.
In the hot air unit,
A heater for heating the air;
A fan for blowing and circulating air heated by the heater into the heating chamber;
A cover constituting an air passage for circulating the air;
A motor for rotating the fan from the rear of the hot air cover;
A partition plate for fixing the motor;
A rear plate constituting the rear of the main body behind the hot air unit;
Provided behind the rear plate is an air passage section for sending cooling air,
In the air passage part,
A heating cooker provided with a cooling device for sucking cooling air from below. Above the air passage portion, an external exhaust duct that exhausts exhaust heat after cooling the cooling air is provided,
The external exhaust duct includes
An exhaust receiver that receives exhaust heat exhausted from the heating chamber;
An exhaust section discharge section that receives exhaust heat after cooling the infrared sensor, an upper flow path that connects the exhaust reception section and the exhaust discharge section with a passage;
The cooking device according to claim 1, further comprising an external exhaust hole for exhausting exhaust heat on the exhaust unit exhaust unit side.

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