JP6530973B2 - High frequency heating cooker - Google Patents

Description

  The present invention relates to a high frequency heating cooker for heating food in a heating chamber.

  In the heating cooker disclosed in Patent Document 1, the heating chamber is illuminated using an LED that is more directional than an incandescent lamp so that the heating state of the food being cooked can be viewed.

WO2014 / 136389A1 gazette

  In the heating cooker shown in Patent Document 1, when the heating chamber is illuminated using a highly directional LED, the light emitted from the LED is heated by the light reflected by the wall and the direct light from the LED. It is something to illuminate.

  Moreover, in the case of a heating cooker having a microwave oven function, the window for looking at the food being heated is provided with a mechanism for preventing microwave leakage, so the visibility in the heating chamber seen through the window is Challenges to decline are known. Moreover, in a heating cooker, the heating cooker provided with the function which illuminates a heating chamber not only during heating but also when a door is opened is known. Therefore, when the illuminance in the heating chamber is increased to compensate for the visibility through the window, when the door is opened, the light emitted by the above-described highly directional LED is the light reflected by the wall and the direct light from the LED There is a problem that the light goes directly into your eyes and you feel dazzling.

  The present invention has been made to solve the above-mentioned problems, and includes a heating chamber for putting and heating a food to be cooked, and a glass window having a radio wave leakage structure which is opened and closed when the food is put in and out. , Heating means for heating the food, door opening / closing detection means for detecting the opening / closing of the door, LED illumination means for illuminating the heating chamber, and changing the illuminance in the heating chamber A light control means for changing the power supplied to the LED lighting means, and a control means for detecting the open / close state of the door open / close detection means to control the light control means.

  The present invention makes it possible to provide a high frequency heating cooker that can be used comfortably.

It is the perspective view which looked at the main part of the cooking-by-heating machine of the present invention from the front side. It is AA sectional drawing of FIG. It is the perspective view which looked at the state which removed the outer frame from the main body of the heating cooker of this invention from the front side. It is the perspective view seen from the back side in the state which removed the outer frame from the main body of the heating cooker. It is the longitudinal cross-sectional view which cut the heating chamber of the heating cooker by the irradiation part. It is the perspective view seen from the left front upper part of the heating chamber of the heating cooker. It is a block diagram showing control means of a cooking-by-heating machine of the present invention.

  Hereinafter, specific contents of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 7 described above.

  In FIG. 1 to FIG. 4, the main body 1 of the heating cooker puts the food to be heated into the heating chamber 28 provided with the wall at the top, bottom, left and right and back and uses the heat of microwave, heater and steam to Cook the food.

  The door 2 is opened and closed in order to put the food in and out of the heating chamber 28, and closing the door 2 makes the heating chamber 28 closed and leaks microwaves used when heating the food. Prevent heat, and make it possible to heat efficiently.

  The handle 9 is attached to the door 2 to facilitate opening and closing of the door 2 and has a shape that can be easily grasped by hand.

  The glass window 3 is attached to the door 2 so that the state of the food being cooked can be confirmed, and double glass of outer glass and inner glass is used to endure high temperature due to heat generation such as a heater. A structure (for example, an iron plate or an iron wire braided with an infinite number of holes) that prevents microwave leakage is used between them.

  The input means 71 is provided on the operation panel 4 on the lower front side of the door 2 and provided on the outside of the range heating means 77 (FIG. 7) for heating the food with microwaves and the heating chamber upper surface 28e of the heating chamber 28 It is generated by the grill heating means 12 which heats the food with the heater, the steam generation means 43 which heats the food with steam, and the hot air unit 11 provided with hot air heaters 14a and 14b on the heating chamber back wall surface 28b Select heating means such as oven heating means for heating the heating chamber 28 with the hot air to be operated, the operation unit 6 for inputting cooking conditions such as heating time and the automatic menu, and the contents and cooking inputted from the operation unit 6 And a display unit 5 for displaying the progress status of the

  The water tank 42 is a container for storing water necessary for producing water vapor, and is provided on the lower front side of the main body 1 so that water can be easily supplied to and drained from the front surface of the main body 1. It can be done.

  The outer frame 7 is a cabinet that covers the upper surface and the left and right sides of the main body 1 of the heating cooker.

  The rear plate 10 forms the rear face of the cabinet described above, and an outer exhaust duct 18 is attached to the upper portion, and the steam discharged from the object to be cooked and the inside of the main body 1 are attached to the inner side where the outer exhaust duct 18 is attached. The exhaust hole 36 for discharging the cooling air (waste heat) 39 after cooling the parts of the above is provided.

  Further, the external exhaust duct 18 exhausts the cooling air 39 having passed through the exhaust hole 36 to the outside of the main body 1, and exhausts the exhaust air from the external exhaust port 8 of the external exhaust duct 18. Exhaust in the upper direction of the and to the front side. By directing the discharge direction of the exhaust gas upward and to the front side, the exhaust gas does not contaminate the wall surface even when the back surface is brought close to the wall surface.

  The machine room 20 is provided in the space between the heating room bottom surface 28 a and the bottom plate 21 of the main body 1, and on the bottom plate 21 a magnetron 33 for heating food and a waveguide 47 connected to the magnetron 33, A control board 23, other parts, various parts to be described later, and cooling means 50 (FIG. 7) for cooling the various parts are attached.

  A shelf 27 comprising an upper shelf 27a, a middle shelf 27b, and a lower shelf 27c is provided on the heating chamber left side surface 28c and the heating chamber right side surface 28d (FIG. 5) of the heating chamber 28, and various heating dishes used for cooking are placed.

  The bottom surface 28a of the heating chamber is recessed at a substantially central portion, and the rotary antenna 26 is installed therein, and the microwaves radiated from the magnetron 33 are output from the waveguide 47 and the output shaft 46a of the rotary antenna driving means 46. Flows into the lower surface of the rotary antenna 26 through the coupling hole 47a through which it passes, and is diffused by the rotary antenna 26 and radiated into the heating chamber 28. The rotary antenna 26 is connected to the output shaft 46 a of the rotary antenna driving means 46.

  The cooling means 50 is a fan unit 15 in which a fan is connected to a cooling motor attached to the bottom plate 21. The cooling air 39 blown by the cooling means 50 is a magnetron 33 or inverter substrate that generates heat in the machine room 20 by itself. 22, cool the weight detection means 25 and the like, flow between the outside of the heating chamber 28 and the outer frame 7 and between the hot air case 11a and the rear plate 10, and cool the outer frame 7 and the rear plate 10; As a result, the exhaust gas is discharged from the external exhaust port 8 of the external exhaust duct 18.

  A hot air unit 11 is attached to the rear of the heating chamber 28, and the hot air unit 11 is provided with a hot air case 11a on the rear side outside the heating chamber inner wall surface 28b, and a hot air fan is provided between the heating chamber rear wall 28b and the hot air case 11a. Hot air heaters 14a and 14b are provided to be positioned on the outer circumference side of 32 and the hot air motor 13 is attached to the rear side of the hot air case 11a, and the motor shaft is connected to the hot air fan 32 through a hole provided in the hot air case 11a. ing.

  Then, the hot air unit 11 is connected through the hot air intake hole 31 and the hot air blowout hole 30 to be the passage of the air provided in the heating chamber back wall surface 28b, and the hot air fan 32 in the hot air case 11a is rotated by the hot air motor 13. The air of the heating chamber 28 and the hot air unit 11 is circulated, and the air circulated by the hot air heaters 14a and 14b is heated.

  Further, instead of the hot air unit 11, heaters may be provided on the upper surface and the lower surface of the heating chamber 28 to heat the heating chamber 28.

  The grill heating means 12 which consists of heaters is attached to the outer side of the heating chamber upper surface 28e. The grill heating means 12 forms a planar shape by winding a heater wire around a mica plate, pressing it against the outside of the heating chamber upper surface 28e and fixing it, heating the heating chamber upper surface 28e to radiate heat of the food in the heating chamber 28 Baking by

  The heating chamber bottom surface 28a is also provided with a plurality of weight detection means 25, for example, a right side weight sensor 25a and a left side weight sensor 25b at the front left and right, and a back side weight sensor 25c at the rear center. Is placed.

  The table plate 24 is for placing food, has heat resistance so that it can be used for both heater heating and microwave heating, has good microwave permeability, and has no problem in terms of hygiene It is molded of a material such as porcelain.

  Above the rear of the heating chamber 28, a temperature detecting means a85 for detecting the temperature in the heating chamber 28 is provided. The temperature detection means a 85 is provided at a position not directly affected by the hot air blown out from the hot air blowout holes 30 of the grill heating means 12 and the hot air unit 11 into the heating chamber 28.

  The steam unit 43 a (FIG. 7) comprises a water vapor generating means 43 and a pump means 87.

  The water vapor generating means 43 is attached to the outer side surface of the heating chamber left side surface 28c, and a steam jet port 44 for jetting water vapor is exposed to the inside of the heating chamber 28.

  Further, the water vapor generating means 43 is made of aluminum casting, and at the time of casting, a sheath heater which is a boiler heating means 89 (FIG. 7) is embedded so as to be integrated. The power consumption of the heater is as large as about 600 W, and the steam generation means 43 can heat the water to a temperature at which water can be boiled in a short time.

  The water supply to the steam generation means 43 is supplied from the water tank 42 through the pipe 45 to the pump means 87 by driving the pump means 87, and is supplied to the steam generation means 43 through the pipe 40. The mixture is heated and boiled to form steam, which is jetted from the steam jet 44 into the heating chamber 28.

  The temperature detection means b 88 detects the temperature of the water vapor generation means 43, transmits the detection result to the control means 151 (FIG. 7) described later, and controls the boiler heating means 89 and the pump means 87.

  The pump means 87 is for pumping up the water in the water tank 42 to the water vapor generating means 43, and comprises a pump and a motor for driving the pump. The adjustment of the amount of water supplied to the water vapor generating means 43 is determined by the ON / OFF ratio of the power supplied to the motor.

  The heating chamber 28 in the present invention will be described with reference to FIGS. 5 to 6.

  In the present embodiment, a description will be given using a configuration in which the heating chamber left side surface 28c is provided with the irradiation unit 28t. However, the irradiation unit 28t may be provided on the heating chamber right side surface 28d.

  The irradiation unit 28t includes an irradiation unit upper portion 28g and an irradiation unit lower portion 28h. The irradiation part 28t is provided with an opening in the heating chamber left side surface 28c. Then, the LED illumination unit 500 is provided outside the heating chamber 28 of the opening (irradiation unit 28t) (see FIG. 4), and the light emitted from the LED illumination unit 500 is guided to the heating chamber 28 through the opening. Light up

  The heating chamber right side surface 28d, the heating chamber left side surface 28c, and the heating chamber bottom surface 28a to which the light from the irradiation unit 28t is irradiated are coated with white or ivory. Light is reflected and diffused to brighten the heating chamber 28 evenly.

  FIG. 7 is a block diagram showing control means of the present heating cooker.

  Next, the operation of the system of the heating cooker will be described using FIG. The power source 76 is for operating the main body 1 of the heating cooker.

  The hot air unit 11 comprises a hot air motor 13 behind the hot air case 11a provided on the outside of the heating chamber deep wall surface 28b provided with the hot air intake holes 31 and the hot air fan 32 through the hole of the hot air case 11a. The hot air heaters 14a and 14b are provided on the outer peripheral side of the hot air fan 32, and the hot air is circulated and supplied to the heating chamber 28.

  The range heating means 77 is an inverter substrate 22 mounted with an inverter circuit for producing a magnetron 33 and a power source for driving the magnetron 33. The inverter circuit generates a power according to the heating power input from the input means 71 and supplies it to the magnetron 33.

  The grill heating means 12 comprises a heater provided on the back side of the top surface of the heating chamber 28, and heats the heating chamber upper surface 28e of the heating chamber 28 to bake the food 130 in the heating chamber 28 by radiation heat. .

  The cooling means 50 is a fan unit 15 in which a fan is connected to a cooling motor attached to the bottom plate 21. The cooling air 39 blown by the cooling means 50 is a magnetron 33 or inverter substrate that generates heat in the machine room 20 by itself. 22, cool the weight detection means 25 and the like.

  The rotating antenna driving means 46 is a motor for driving the rotating antenna 26, and is a united motor with a synchronous motor and a gear for reducing the rotational speed.

  The weight detection means 25 measures the weight of the food placed on the table plate 24.

  The temperature detection means a 85 is attached to the heating chamber 28, detects the temperature in the heating chamber 28, and adjusts the power of the heater of the grill heating means 12 by the control means 151.

  The steam unit 43 a comprises water vapor generating means 43 and pump means 87.

  The water vapor generation means 43 comprises a boiler heating means 89 comprising a heater for heating water, and a temperature detection means b88 for detecting the temperature of the water vapor generation means 43. The control means 151 heats the boiler based on the detection results of the temperature detection means b88. The means 89 and the pump means 87 are controlled.

  Reference numeral 71 denotes an input unit, which shows the operation unit 6 and the display unit 5 here.

  Reference numeral 152 denotes a door opening / closing detection unit that detects the opening / closing of the door 2.

  Reference numeral 500 denotes LED illumination means, in which the LEDs are arranged to illuminate the inside of the heating chamber 28 from the irradiation unit 28t. Although two illumination parts 28g and 28h are provided in this embodiment, one or two or more places may be provided, and the installation place is not limited to the heating chamber left side surface 28c.

  Reference numeral 501 denotes a light control means, which changes the brightness of the LED at the time of ON and OFF of the LED provided in the LED illumination means 500 and at the time of ON to change the illuminance in the heating chamber 28 in a plurality of steps. To change the power supplied to the As a method of changing the electric power, there are a method of changing the current supplied to the LED and a method of changing the duty ratio for turning on / off the supplied electric power as a known technique.

  A control means 151 is mounted on the control board 23 and operates to heat the food according to the contents input from the input means 71, and detects the state of the food and the state of the heating chamber from each detection means After that, each heating means and drive means are operated as required. Further, based on the detection information of the door opening / closing detection unit 152, the heating control and the control of the light adjustment unit 501 are performed.

  In heating control, when there is an input to start heating from the input unit 71, the door opening / closing detection unit 152 detects the closing of the door 2 to start the heating unit, and detects the opening of the door 2 during heating. When this happens, the heating is stopped to ensure the safety of the user.

  Moreover, control of the light control means 501 darkens the door 2 by making the brightness of the LED of the LED lighting means 500 when the door 2 is opened against the brightness of the LED of the LED lighting means 500 during heating. It reduces glare when it is opened. This is because, in the case of the high-frequency heating cooker, the glass window 3 provided in the door 2 is provided with a mechanism for preventing the leakage of the microwave, so the inside of the heating chamber 28 looks dark through the glass window 3. Therefore, when the state seen through the glass window 3 is brightened, when the door 2 is opened (opened) and the inside of the heating chamber 28 is directly viewed as being too bright and dazzling, the LED lighting according to the opening of the door 2 The brightness of the LED of the means 500 is changed by providing the light adjustment means 501.

  When checking the condition of food, depending on the surrounding environment, it may be even more difficult to see (such as when cooking without turning on the surrounding electricity). Therefore, in addition to the above, a sensor (not shown) for detecting the brightness around the body 1 is provided, and the brightness of the LED is adjusted according to the brightness around it, so that the brightness around it is affected. It becomes possible to check the condition of the food in the heating chamber 28 and reduce glare when the food is put in and out of the heating chamber or when the door is opened and the condition of the food is checked, and comfortable cooking can be carried out. .

11 hot-air units,
12 Grill heating means 28 heating chamber 28b heating chamber inner wall surface 28c heating chamber left side surface 28d heating chamber right side surface 28e heating chamber upper surface 28t irradiation unit 12 grill heating means 151 control means 152 door open / close detection means 500 LED illumination means 501 light control means

Claims (1)

A heating chamber for putting and heating the food;
A door which is opened and closed when the food is put in and out and a glass window having a radio wave leak structure is provided,
Heating means for heating the food to be cooked;
Door opening / closing detection means for detecting opening / closing of the door;
LED illumination means for illuminating the heating chamber;
A light control means for changing the power supplied to the LED lighting means to change the illuminance in the heating chamber;
Control means for detecting the open / close state of the door open / close detection means and controlling the light adjustment means;
It has an ambient detection sensor that detects the ambient brightness.
The bottom of the heating chamber is painted white or ivory to diffuse and brighten the light,
The LED lighting means illuminates the heating chamber through a side opening of the heating chamber,
The control means changes the illuminance in the heating chamber by the LED illumination means in a plurality of steps,
The control means is for darkening the brightness of the LED illumination means when the door is opened with respect to the brightness of the LED illumination means during heating.
A high frequency heating cooker characterized by adjusting the brightness of the LED illumination means in accordance with the brightness of the surroundings detected by the surroundings detection sensor .

Images