JP2017003153A - High-frequency heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-frequency heating cooker in which a state of a cooking object food becomes easily visible by making a wide range in a heating room bright.SOLUTION: A high-frequency heating cooker includes: an openable/closable door 2 which is located at a heating chamber opening part of a heating chamber, and in which glass windows 3a, 3b having a mechanism for preventing leakage of electric wave are provided; and a lighting unit for illuminating the heating chamber by an irradiation part provided on a heating chamber right side surface 28d or on a heating chamber left side surface 28c of the heating chamber. The heating chamber right side surface 28d and the heating chamber left side surface 28c and at least one of a bottom surface and a depth surface of the heating chamber are colored by white or an ivory color, the irradiation part is arranged on a near side with respect to the depth direction of the heating chamber, the number of hole group 80g for constituting the mechanism for preventing leakage of electric wave is increased, and a parting for viewing the heating chamber 28 through the hole group 80g by closing the door 2 is arranged so that the whole area including the four corners of the bottom surface can be viewed. The minimum illuminance of the bottom surface of the heating chamber 28 is 10 lux or greater and the illuminance of the center part of the bottom surface of the heating chamber 28 is 80 lux or greater.SELECTED DRAWING: Figure 21

Description

  The present invention relates to a high-frequency heating cooker that heats in a heating chamber.

  In recent high-frequency heating cookers, there is one that includes an LED in the illumination that illuminates the heating chamber.

  What is shown in Patent Document 1 is 100 degrees or less with respect to the visual field direction with reference to a point where the center of the light emission direction of the interior lamp is about 30 to 40 cm away from the center of the opening for taking out the object to be heated in the heating chamber. What is arranged to become is described.

Japanese Patent No. 5593706

  In the high-frequency heating cooker shown in Patent Document 1, the angle that shows strong luminance in the light emission direction of the interior lamp of the LED element is removed from the viewing angle in a state where the door is opened. Since the interior lamp of the LED element irradiates, there is a problem that there is a portion that looks dark about the visibility that the translucent door in which the punch hole is formed is closed and the heating chamber is seen through the door.

The present invention has been made in order to solve the above-described problems. A heating chamber for heating an object to be heated and a mechanism for preventing radio wave leakage located at the heating chamber opening of the heating chamber. An openable / closable door provided with a glass window, and an illumination unit for illuminating the heating chamber from an irradiation section provided on the right side surface of the heating chamber or the left side surface of the heating chamber. The right side surface of the heating chamber, the left side surface of the heating chamber, and the bottom surface or back surface thereof are provided in white or ivory color, and the irradiating unit is disposed on the front side with respect to the depth direction of the heating chamber to prevent leakage of radio waves. The number of hole groups in the punching portion constituting the mechanism to be prevented is increased, and the parting in which the door is closed and the heating chamber is viewed through the hole group is arranged so that the entire four corners of the bottom surface can be seen. Minimum of the bottom of the chamber Once again in 10 lux, the illuminance of the center of the placing surface of the heating chamber are those more than 80 lux.

  The present invention makes it easy to visually recognize the state of food to be cooked by brightening a wide range in the heating chamber.

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 in the irradiation part. It is the perspective view seen from the upper left front of the heating chamber of the heating cooker. It is the perspective view seen from the right front of the heating chamber to the heating cooker. It is a side view of the illumination unit attachment part seen from the left of the heating chamber of the heating cooker. It is a perspective view of the illumination unit attachment part seen from the left front upper direction of the heating chamber to the heating cooker. It is the longitudinal cross-sectional view which cut the illumination unit attachment part of the heating cooker by the irradiation part. It is a perspective view of the board | substrate holding member of the heating cooker. It is a front view of the board | substrate holding member of the heating cooker. It is a side view of the board | substrate holding member of the heating cooker. It is a rear view of the board | substrate holding member of the heating cooker. It is a perspective view of the glass holding member of the heating cooker. It is a front view of the glass holding member of the heating cooker. It is a top view of the glass holding member of the heating cooker. It is BB sectional drawing of FIG. It is a block diagram showing the control means of the heating cooker of this invention. It is explanatory drawing of the flame | frame of the heating cooker of this invention. It is explanatory drawing of the heating chamber seen through the hole group of the door from the door front of the heating cooker of this invention. It is explanatory drawing of the brightness sensitive determination result of the heating chamber seen through the hole group of the door from the door front of the heating cooker of this invention. It is explanatory drawing of the heating chamber seen through the hole group of the door from the door front in case the range of a hole group is narrow as a comparative example of the heating cooker of this invention.

  Hereinafter, specific contents of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 23 described above.

  1 to 4, the main body 1 of the heating cooker puts the food to be cooked in a heating chamber 28 having walls on the top, bottom, left, and right and the back, and uses microwaves, heaters, and steam heat to cover the food. Cook the cooked food.

  The door 2 opens and closes in order to put the food to be taken in and out of the heating chamber 28, and when the door 2 is closed, the heating chamber 28 is hermetically sealed to leak microwaves used for heating the food to be cooked. It is possible to prevent heat, contain heat, and heat efficiently. Details of the door 2 will be described later.

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

  The glass window 3 is provided with a glass window inner side 3b on the heating chamber 28 side of the door 2 and an outer glass window outer side 3a so that the state of food being cooked can be confirmed, and is transparent to withstand high temperatures due to heat generated by a heater or the like. The glass is used. The outside 3a of the glass window has a good view without having a half mirror function for improving the design of the appearance. Thus, the glass window 3 makes it easy to see inside the heating chamber 28 by using transparent glass.

  The input means 71 is provided on the operation panel 4 below the front surface of the door 2, and is provided on the outside of the heating chamber upper surface 28 e of the heating chamber 28 and a range heating means 77 (FIG. 19) that heats the food by microwaves. Generated by the grill heating means 12 for heating the food to be cooked by the heater, the water vapor generating means 43 for heating the food to be cooked by water vapor, and the hot air unit 11 provided with the hot air heaters 14a, 14b on the back wall surface 28b of the heating chamber. A heating means such as an oven heating means for heating the heating chamber 28 with hot air to be selected, an operation unit 6 for inputting cooking conditions such as a heating time and an automatic menu, and contents inputted from the operation unit 6 and cooking And a display unit 5 for displaying the progress state.

  The water tank 42 is a container for storing water necessary for producing water vapor. The water tank 42 is provided on the lower front side of the main body 1 and can be attached and detached from the front surface of the main body 1 to facilitate water supply and drainage. It can be done.

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

  The rear plate 10 forms the rear surface of the cabinet described above, and an external exhaust duct 18 is attached to the upper portion of the rear plate 10. Exhaust holes 36 for discharging cooling air (waste heat) 39 after cooling the components are provided.

  The external exhaust duct 18 discharges the cooling air 39 that has passed through the exhaust hole 36 to the outside of the main body 1. Exhaust air is discharged from the external exhaust port 8 of the external exhaust duct 18, and the exhaust discharge direction is the main body 1. The air is exhausted to the upper side and to the front side. The exhaust direction is directed upward and toward the front side, so that the wall surface is not contaminated by the exhaust even when the rear surface is brought close to the wall surface.

  The machine room 20 is provided in a space portion between the heating chamber bottom face 28a and the bottom plate 21 of the main body 1. On the bottom plate 21, a magnetron 33 for heating food, a waveguide 47 connected to the magnetron 33, The control board 23, other components described later, and cooling means 50 (FIG. 19) for cooling these various components are attached.

  The heating chamber left side 28c and the heating chamber right side 28d (FIG. 5) of the heating chamber 28 are provided with a shelf 27 including an upper shelf 27a, an intermediate shelf 27b, and a lower shelf 27c, on which various heating dishes used for cooking are placed.

  The heating chamber bottom surface 28a has a concave shape in the substantially central portion, and the rotating antenna 26 is installed therein, and the microwave radiated from the magnetron 33 is output to the waveguide 47 and the output shaft 46a of the rotating antenna driving means 46. Flows into the lower surface of the rotating antenna 26 through the coupling hole 47a that penetrates, is diffused by the rotating antenna 26, and is radiated into the heating chamber 28. The rotating antenna 26 is connected to the output shaft 46 a of the rotating antenna driving means 46.

  The cooling means 50 is a fan device 15 in which a fan is connected to a cooling motor attached to the bottom plate 21, and the cooling air 39 blown by the cooling means 50 is a magnetron 33 that generates heat in the machine room 20 or an inverter board. 22, the weight detecting means 25 and the like are cooled, 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 the exhaust hole 36 is cooled while cooling the outer frame 7 and the rear plate 10. And is discharged from the external exhaust port 8 of the external exhaust duct 18.

  A hot air unit 11, which is a heating source composed of a heater, is attached to the rear of the heating chamber 28. The hot air unit 11 is provided with a hot air case 11 a on the rear side outside the heating chamber inner wall surface 28 b, and the heating chamber inner wall surface 28 b and the hot air case are provided. Hot air fan 32 and hot air heaters 14a and 14b are provided so as to be located on the outer peripheral side of hot air fan 32 between 11a and 11a, hot air motor 13 is attached to the rear side of hot air case 11a, and the motor shaft is provided in hole provided in hot air case 11a. It connects with the hot air fan 32 through.

  And the hot air unit 11 is connected through the hot air intake hole 31 and the hot air blowing hole 30 which are air passages provided in the heating chamber inner 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 between 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 and lower surfaces of the heating chamber 28 to heat the heating chamber 28.

  Outside the heating chamber upper surface 28e, grill heating means 12, which is a heating source composed of a heater, is attached. The grill heating means 12 wraps a heater wire around a mica plate to form a flat surface, presses and fixes the mica plate to the outside of the heating chamber upper surface 28e, heats the heating chamber upper surface 28e, and radiates heat to the cooking object in the heating chamber 28. It is something to bake.

  The heating chamber bottom surface 28a is provided with a plurality of weight detecting means 25, for example, a right weight sensor 25a, a left weight sensor 25b on the front left and right, and a back weight sensor 25c on the rear center, on which the table plate 24 is provided. 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 with materials such as porcelain. The table plate 24 is a white-colored placement surface on which the object to be heated is placed in the heating chamber 28.

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

  The steam unit 43 a (FIG. 19) includes 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 left side surface 28c of the heating chamber, and the steam outlet 44 from which water vapor is ejected faces the heating chamber 28.

  Further, the water vapor generating means 43 is made of aluminum, and a sheathed heater as a boiler heating means 89 (FIG. 19) is embedded so as to be integrated at the time of casting. The power consumption of the heater is as large as around 600 W, and the steam generating means 43 can heat the water to a temperature at which it can be boiled in a short time.

  The water supply to the water vapor generating means 43 is supplied from the water tank 42 to the pump means 87 through the pipe 45 by driving the pump means 87, supplied to the water vapor generating means 43 through the pipe 40, and the water vapor generating means 43. Is heated and boiled, and becomes steam, and is ejected from the steam ejection port 44 to the heating chamber 28.

  The temperature detection means b88 detects the temperature of the water vapor generation means 43, transmits the detection result to the control means 151 (FIG. 19) described later, and controls the boiler heating means 89 and the pump means 87.

  The pump means 87 pumps the water in the water tank 42 to the water vapor generating means 43, and is composed of a pump and a motor that drives 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 embodiment will be described with reference to FIGS. An irradiation unit 28t for illuminating the inside of the heating chamber 28 is provided on the heating chamber right side surface 28d or the heating chamber left side surface 28c of the heating chamber 28. 5 to 7 are views in which an irradiation unit 28t is provided on the left side 28c of the heating chamber. Hereinafter, an example in which the irradiation unit 28t is provided on the left side surface 28c of the heating chamber will be described.

  The irradiation unit 28t includes an irradiation unit upper 28g and an irradiation unit lower 28h. The irradiation unit 28t has an opening in the left side surface 28c of the heating chamber. As for the position in the height direction where the opening is provided, the irradiation unit upper part 28g is provided above the shelf upper stage 27a, and the irradiation part lower part 28h is provided between the shelf middle stage 27b and the shelf lower stage 27c. This is because when a dish is placed on the middle shelf 27b for cooking, light is irradiated below the middle shelf 27b. The position in the depth direction is about 1/4 of the depth direction of the heating chamber 28.

  An illumination unit 500 (FIG. 8) is provided outside the irradiation unit 28t.

  Reference numeral 28j denotes an inlet hole for allowing the heated air after cooling the magnetron 33 to enter the heating chamber 28, and is provided on the lower side of the heating chamber 28.

  The heating chamber upper surface 28e and the heating chamber inner wall surface 28b provided with a heating source that is heated by the grill heating means 12 and the hot air unit 11 are painted in black or gray. On the other hand, the heating chamber right side surface 28d, the heating chamber left side surface 28c, and the heating chamber bottom surface 28a irradiated with light from the LED illumination unit 400 provided outside the irradiation unit 28t of the heating chamber right side surface 28d or the heating chamber left side surface 28c are: Painted in white or ivory. The heating chamber right side surface 28d, the heating chamber left side surface 28c, and the heating chamber bottom surface 28a that are not provided with the heating source are brighter than the heating chamber upper surface 28e and the heating chamber inner wall surface 28b.

  The ivory is light yellowish and slightly gray white, and the inside of the heating chamber 28 reflects light from the white LED of the LED illumination unit 400 and diffuses and appears bright. The inside of the heating chamber 28 is colored in two colors, including the color of the heating chamber right side surface 28d, the heating chamber left side surface 28c, and the heating chamber bottom surface 28a, and the color of the heating chamber upper surface 28e and the heating chamber back wall surface 28b.

  The lighting unit 500 will be described with reference to FIGS. 6 and 8 to 18.

  In FIG. 6, a holding member support portion 507 s that is raised from the side surface to the outside and provided in a claw shape is provided below the irradiation portion lower portion 28 h of the left side surface 28 c of the heating chamber.

  11 to 14, reference numeral 501 denotes a substrate holding member. The substrate holding member 501 is formed of a transparent resin. Reference numeral 501a denotes a base portion having a notch-shaped connection port 501h. On the base portion 501a, there are provided an upper portion 501d and a supporting hole portion 501f. Further, below the base portion 501a, a lower portion 501e and a lower supporting hole portion 501g are provided.

  A light guide part 504 having a substantially truncated cone shape is provided on the front side of the base part 501a. The intersection of the light guide portion 504 and the base portion 501a is an elliptical base portion 504b that is long in the vertical direction. The distal end portion 506 is circular, and the base portion 504b and the distal end portion 506 are connected by a side surface portion 504a. The side surface portion 504a is a glossy surface. The tip 506 is subjected to a textured process.

  Further, a light incident portion 501m of the light guide portion 504 is provided on the back side of the base portion 501a. The light guide portion 504 has an outer peripheral portion 501b rising from the flat portion 501c. The light incident part 501m is a long and long ellipse and has a glossy surface. A base 501p and four claw portions 501k are provided on the back side of the base portion 501a.

  15 to 18, reference numeral 507 denotes a glass holding member.

  Reference numeral 507a denotes a rectangular flat portion, which is provided with rising holes 507b that rise to the front in two places. Side surface restraining portions 507c that expand in a stepped manner are provided on the left and right sides of the flat surface portion 507a. Support claw portions 507d that rise to the front side are provided on the left, right, top, and bottom of the side surface restraining portion 507c. A mounting surface 507e having a flat surface on the front side is provided on the left and right sides of the side holding portion 507c.

  Further, a fixed portion 507f bent to the front side is provided above the flat portion 507a. The fixing portion 507f includes a fixing hole 507g.

  A structure for attaching the illumination unit 500 to the heating chamber 28 will be described with reference to FIGS. 6 and 8 to 18.

  The glass 505 is supported on the front and left and right side surfaces by the side surface restraining portion 507c of the glass holding member 507, and the upper and lower surfaces are supported by the support claw portion 507d. The lower part of the glass holding member 507 holding the glass 505 is supported by the holding member support part 507s (see FIG. 6) outside the heating chamber left side surface 28c of the heating chamber 28, and the fixing part 507f of the glass holding member 507 is supported. The fixing hole 507g and the heating chamber upper surface 28e of the heating chamber 28 are screwed. When attached in this way, the glass 505 is provided on the rising side of the burring of the hole of the irradiation section 28t of the heating chamber 28, and the irradiation section 28t is closed with the glass 505, and the hot air (steam) and scattered matter in the heating chamber 28 are covered. The tip 506 of the light guide 504 is not soiled, and the glass 505 can be easily wiped off when soiled.

  Next, the heat shield plate 503 is attached to the outside of the left side surface 28c of the heating chamber from the outside where the glass 505 is fixed by the glass holding member 507. The heat shield plate 503 is provided with a hole 503c and a duct 503b through which the light guide unit 504 passes in a portion corresponding to the irradiation unit 28t.

  The printed circuit board 502 is a long and narrow rectangle, and an LED illumination unit 400 that is an upper LED illumination unit 401 and a lower LED illumination unit 402 with white LEDs is mounted on the upper and lower sides. The printed circuit board 502 includes a terminal 502 a connected to the control unit 151. The printed circuit board 502 is an aluminum substrate made of a material having good heat dissipation, such as aluminum, in order to dissipate the self-heating of the LED lighting unit upper 401 and the LED lighting unit lower 402. Aluminum substrates are used in LED bulbs. Moreover, heat dissipation can also be improved by integrating the printed circuit board of the LED illumination part upper 401 and the LED illumination part lower 402, and ensuring a large thermal radiation area.

  In general, since an LED breaks when the junction temperature exceeds about 120 ° C., it is necessary to use the LED within a range not exceeding the break temperature.

  The temperature rise of the LED illumination unit 400 may be due to radiant heat from the heating chamber 28 heated by the grill heating means 12 and the hot air unit 11 and self-heating of the LED determined by the product of the LED current and the LED on voltage. .

  The printed circuit board 502 is inserted into the back surface side of the substrate holding member 501 so that the surface on which the LED illumination unit 400 is mounted is in contact with the back surface side of the substrate holding member 501, and is placed on the table 501p and fixed by the claw portion 501k. Has been. The printed circuit board 502 is provided with a gap between the base portion 501a and a wind path through which a cooling air 39d described later flows. The terminal 502a protrudes from the connection port 501h of the substrate holding member 501 to the heating chamber 28 side. By fixing the printed board 502 to the board holding member 501, the LED lighting unit upper 401 and the LED lighting unit lower 402 mounted on the printed board 502 are fixed by approaching the light incident part 501m of the board holding member 501 and providing a gap. Is done. Light on the LED illumination unit 401 and the LED illumination unit 402 with flat light emitting surfaces enters the light guide unit 504 from the flat light incident unit 501m without loss.

  In order to fix the board holding member 501 holding the printed board 502 to the heating chamber 28, the light guide part 504 is passed through the hole 503 c provided in the heat shield plate 503, and the vertical holding hole part 507 b of the glass holding member 507 is passed. The light guide unit 504 is inserted. The leading end 506 of the light guide 504 is close to the flat surface of the glass 505, the upper portion 501d of the substrate holding member 501 and the lower portion 501e of the substrate holding member 501 come into contact with the heat shielding plate 503, and the upper supporting hole portion 501f and the lower supporting hole portion 501g. The upright part 503a of the heat shield plate 503 is inserted and fixed.

  In this way, by fixing the substrate holding member 501 holding the printed circuit board 502 to the heating chamber 28, the front end portion 506 of the light guide unit 504 is determined at a position corresponding to the irradiation unit 28t.

  Then, light is emitted from the LED illumination unit 400, and light is irradiated from the irradiation unit 28 t to the inside of the heating chamber 28 through the light guide unit 504 to illuminate the inside of the heating chamber 28 brightly.

  The reason why the light incident part 501m and the base part 504b are oval can be dealt with when the size of the light emitting part of the LED illumination part 400 is increased or when two light emitting elements are arranged.

  The light incident portion 501m and the side surface portion 504a are glossy surfaces, and the tip end portion 506 is subjected to a graining process so that light entering from the light incident part 501m does not leak from the side surface part 504a and diffuses by the graining process of the tip part 506. This is to let it go. It is diffused over a wide area in the heating chamber 28. In addition, the inventor has experimentally confirmed that the illuminance on the surface of the table plate 24 that is the mounting surface is 10 lux or more at any measurement point. Details of whether the heating chamber 28 feels bright will be described later.

  The glass holding member 507 is a glass that guides the irradiation portion 28t and the light guide portion 504 on the left side surface 28c of the heating chamber by fixing the holding member supporting portion 507s on the left side surface 28c of the heating chamber and the upper surface 28e of the heating chamber by the fixing portion 507f. The position of the rising hole 507b of the holding member 507 can be matched.

  In order to reduce the radiant heat from the heating chamber 28, the printed circuit board 502 to which the LED illumination unit 400 is attached is fixed at a position away from the left side surface 28c of the heating chamber, and between the left side surface 28c of the heating chamber and the printed circuit board 502. In this case, a heat shield plate 503 is interposed.

  Then, the light emitted from the upper LED illumination unit 401 and the lower LED illumination unit 402 is guided to the irradiation unit 28 t by the light guide unit 504 integrated with the substrate holding member 501. The substrate holding member 501 is made of a heat-resistant transparent resin such as polycarbonate.

  The structure of the door 2 will be described with reference to FIGS.

  The door 2 of the high frequency heating cooker includes a choke structure 80a provided on four sides along the heating chamber opening 28f in order to prevent leakage of radio waves from the joint between the door 2 and the main body 1 during microwave heating, Punching portion 80d comprising a flat portion 80b that contacts the heating chamber flange portion 28k, a fixing portion 80c that fixes the glass window interior 3b, and a hole group that can confirm the object to be heated placed in the heating chamber 28 while preventing leakage of radio waves. Are integrally formed. The punching portion has a step 80e with respect to the fixed portion 80c so as not to contact the punched portion 80d and the fixed glass window 3b.

  The frame 80 uses a metal steel plate having a thickness of 0.6, and the punching portion 80d includes a hole group 80g in which holes having a small diameter of φ1.35 are arranged in a staggered manner with a pitch of 1.6, and a strength holding portion 80f having no holes. Provided. The strength holding portion 80f is provided with a wide width in the longitudinal direction of the door 2 to prevent the door 2 from being twisted. And with respect to the area of the glass window 3b, conventionally, the aperture ratio of the hole is 35 to 50%, and the number of holes is increased up and down and left and right to increase the aperture ratio to 60% or more. Visibility is improved. A hole group 80g in which holes having a small diameter of 1.35 are arranged in a staggered manner with a pitch of 1.6 cannot increase the aperture ratio by greatly changing the diameter of the holes in order to prevent radio wave leakage.

  FIG. 19 is a block diagram showing the control means of the heating cooker. Next, operation | movement of the system of a heating cooker is demonstrated using FIGS. 2-4, FIG. 6, FIG. 10, FIG. The power source 76 is for operating the main body 1 of the cooking device.

  The hot-air unit 11 includes a hot-air motor 13 on the rear side of the hot-air case 11a provided outside the heating chamber inner wall surface 28b including the hot-air intake holes 31 and the hot-air blowing holes 30, and a hot-air fan 32 is attached to the motor shaft through the holes of the hot-air case 11a. The hot air heaters 14 a and 14 b 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 board 22 on which an inverter circuit that creates a power source for driving the magnetron 33 and the magnetron 33 is mounted. The inverter circuit creates a power supply corresponding to the heating power input from the input means 71 and supplies it to the magnetron 33.

  The grill heating means 12 is composed of a heater provided on the back side of the top surface of the heating chamber 28, and heats the heating chamber upper surface 28 e of the heating chamber 28 to bake an object to be cooked (not shown) in the heating chamber 28 by radiant heat. Is.

  The cooling means 50 is a fan device 15 in which a fan is connected to a cooling motor attached to the bottom plate 21, and the cooling air 39 blown by the cooling means 50 is a magnetron 33 that generates heat in the machine room 20 or an inverter board. 22. Cool the weight detection means 25 and the like. In particular, during the range heating, the cooling air 39d whose temperature has risen after cooling the magnetron 33 that generates heat is blown upward from the lower side of the left side surface 28c of the heating chamber, and part of the cooling air 39d is a heat shield plate. Flowing into the duct 503b provided in the port 503 and blowing into the heating chamber 28 from the inlet hole 28j to warm the food to be cooked, prevents the glass window from being clouded on the heating chamber 28 side and the glass 505 from being fogged. doing. In addition, the cooling air 39 d that has flowed into the duct 503 b flows between the flat surface portion 507 a provided with the rising hole portion 507 b of the glass holding member 507 and the glass 505, and cools the light guide portion 504, particularly the front end portion 506.

  Further, the cooling air 39 d that flows between the heat shield plate 503 and the outer frame 7 is mounted on the board holding member 501, the printed board 502, and the printed board 502 that are outside the heat shield board 503. The illumination unit 400 is cooled. In particular, thanks to the gap provided between the printed board 502 and the base portion 501a described above, both sides of the printed board 502 can be efficiently cooled. Further, the cooling air 39d flows through the gap between the light emitting surface of the LED illumination unit 400 and the light incident unit 501m, and the LED illumination unit 400 can be efficiently cooled.

  Further, by making the light guide portion 504 longer, heat conduction from the temperature of the wall surface of the heating chamber 28 is prevented, and further, the heat shielding plate 503 is interposed to block radiant heat.

  When the magnetron 33 is not operating during heating by the heater, the temperature of the cooling air 39d is lowered, so that the substrate holding member 501, the printed board 502, and the LED illumination unit 400 are efficiently cooled even during heating using the heater.

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

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

  The temperature detection means a85 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 is composed of water vapor generating means 43 and pump means 87.

  The water vapor generating means 43 comprises a boiler heating means 89 comprising a heater for heating water, and a temperature detecting means b 88 for detecting the temperature of the water vapor generating means 43, and the control means 151 is configured to heat the boiler from the detection result of the temperature detecting means b 88. The means 89 and the pump means 87 are controlled.

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

  Reference numeral 151 denotes a control unit which is mounted on the control board 23 and operates to cook food according to the contents input from the input unit 71. The state of the food and the state of the heating chamber are detected from each detection unit. Then, each heating means and driving means are operated as necessary.

  The LED illumination unit 400 is controlled by the control unit 151 to emit light during cooking and illuminate the inside of the heating chamber 28 brightly.

  Next, it will be described with reference to FIGS. 21 to 23 that the heating chamber 28 looks bright.

  FIG. 21 is an explanatory diagram of the heating chamber 28 viewed from the front of the door 2 through the hole group 80g, and FIG. 22 is an explanatory diagram of the brightness sensitivity determination result of the heating chamber 28 viewed from the front of the door 2 through the hole group 80g. These are explanatory drawings of the heating chamber 28 seen through the hole group 80g from the front of the door 2 when the range of the hole group 80g of the door 2 is narrow in the comparative example.

  The door 2 of FIG. 21 includes a frame 80, and the total area of the small-diameter hole group 80g for fluoroscopy provided in the frame 80 is 60% or more with respect to the area of the glass window 3b provided on the heating chamber 28 side. A large number of the holes are provided so that In this case, when the door 2 is closed and the heating chamber 28 is viewed through the hole group 80g, the whole can be seen up to the four corners of the table plate 24 as a mounting surface. The four corners are the positions of P2, P3, P4, and P5 shown in FIG. The table plate 24 compares both a white color and a black color that is darker than the white color as a comparative example.

  FIG. 23 is an explanatory diagram of the heating chamber 28 as viewed from the front of the door 2 through the hole group 80g when the range of the hole group 80g is narrower than that shown in FIG. 21 as a comparative example. When the door 2 is closed and the heating chamber 28 is viewed through the hole group 80g, there is a part of the table plate 24 that is a placement surface that cannot be seen, and the whole corner cannot be seen.

  In FIG. 21, the illuminance on the upper surface of the table plate 24, which is the placement surface of the object to be heated, will be described. The measurement points are the central portion P1 of the table plate 24 on which the object to be heated is placed and the four corners of the table plate 24. In the instruction manual, when one object to be heated is placed on the table plate 24, it is instructed to place it on the central portion P1. A description will be given of a configuration in which an irradiation unit 28t including an irradiation unit upper portion 28g and an irradiation unit lower portion 28h is provided on the left side surface 28c of the heating chamber. In the four corners, the heating chamber left side 28c side is the front irradiation portion side front corner portion P2 and the rear irradiation portion side rear corner portion P3, and the heating chamber right side surface 28d side is the rear counter irradiation portion side rear corner portion P4, This is the front corner portion P5 on the side opposite to the irradiation side.

  The reason for selecting five points including the central portion P1 and the four corners is that when the heating chamber 28 is viewed through the door 2, the entire heating chamber 28 enters the field of view at once. For this reason, five points are selected as ones that feel the entire heating chamber 28.

  In particular, the central portion P1 is a position on which an object to be heated is placed, and is the most noticeable place when the inside of the heating chamber 28 is viewed. The four points at the four corners serve as a background surrounding the periphery when attention is paid to the central portion P1, and all of the central portion P1 and the four corners enter the visual field.

  The illuminance is highest at the irradiation side near corner P2 immediately next to the irradiation unit 28t, followed by the central portion P1, and lowest at the irradiation side deep corner P3. The irradiation part side back corner part P3 is lower than the center part P1 because it is the back side on the irradiation part 28t side. Light is diffused in the heating chamber 28 due to the embossing of the tip 506 of the light guide 504. The inventor has experimentally confirmed that the illuminance on the surface of the table plate 24 that is the mounting surface is 10 lux or more at any measurement point. Further, the position of the irradiation unit 28t is provided on the front side of about 1/4 in the depth direction of the heating chamber 28, and the irradiation unit side on the front side of the irradiation unit side back corner part P3 and the back counter irradiation unit side back corner part P4. The front corner portion P2 and the front irradiation portion side front corner portion P5 on the front side are brightened.

  FIG. 22 shows the result of examining whether the user feels bright or dark when looking inside the heating chamber 28 from above the front of the main body 1 shown in FIG.

  (A) is a sensitive result of how the brightness feels depending on the surface color of the object to be heated. As a result, white color was bright and black color was dark. Since the table plate 24 is a white color, the light from the LED illumination unit 400 is diffused and reflected to brighten the white or ivory heating chamber left side 28c and the heating chamber right side 28d of the heating chamber 28. The table plate 24 has a white color and is illuminated by light from the white LED illuminating unit 400 and is reflected and jumps into the eyes.

  (B) is a sensitive result of how the brightness is felt by a parting through the hole group 80g of the door 2. As a result, it is felt bright that the entire surface of the table plate 24 that is the mounting surface is visible to the four corners.

  On the other hand, as in the state shown in FIG. 23, a part of the table plate 24 that is the mounting surface that is partially invisible and that cannot be entirely seen up to the four corners feels dark.

  I feel bright because the bright area that jumps into my eyes is large. In the case where the parting is good, the table plate 24 is a white color and the light from the white LED illumination unit 400 is reflected and diffused to brighten the light. The table plate 24 is felt by the appearance of being reflected by being reflected by the white LED illuminating unit 400 and reflected by the white color.

  (C) uses the conditions determined to be “bright” based on the sensitivity results of feeling the brightness of (a) and (b). According to (a), the table plate 24, which is the placement surface of the object to be heated, is white. As shown in FIG. 21B, when the door 2 is closed and the heating chamber 28 is viewed through the hole group 80g, the whole can be seen up to the four corners of the table plate 24 as a mounting surface (FIG. 21).

  Sensitivity results on how the brightness feels by combining the illuminance of the central part P1 with 40, 80, 160 lux and the minimum illuminance of the corner part (the irradiation part side back corner part P3) with 5 and 10 lux. is there. It is felt that the center portion P1 is 40 lux, and the minimum illuminance at the corner (irradiation portion side back corner portion P3) is 10 lux. It is felt that the center portion P1 is 80 lux, and the minimum illuminance at the corner (irradiation portion side back corner portion P3) is 10 lux. It is felt that the center portion P1 is 160 lux, and the minimum illuminance at the corner (irradiation portion side back corner portion P3) is 5 lux is dark.

  The condition determined to be “bright” by the sensitivity result of feeling the brightness of (a) and (b) according to (c) is used. According to (a), the table plate 24, which is the placement surface of the object to be heated, is white. As shown in FIG. 21B, when the door 2 is closed and the heating chamber 28 is viewed through the hole group 80g, the whole can be seen up to the four corners of the table plate 24 as a mounting surface (FIG. 21). In addition to this condition, when the inside of the heating chamber 28 is viewed through the door 2 having the hole group 80g, in order to feel bright, the minimum illuminance of the mounting surface 24 of the heating chamber 28 is 10 lux or more. The illuminance at the center P1 of the mounting surface 24 is 80 lux or more.

  When the illuminance of the central portion P1 is 40 lux and the minimum illuminance value is 10 lux, the central portion P1 in the heating chamber 28 does not feel bright. Although the difference in illuminance between the center portion P1 and the position of the minimum illuminance is small, the minimum illuminance feels particularly dark compared to the center portion P1. Therefore, the entire inside of the heating chamber 28 feels dark. The central portion P1 and the minimum illuminance located in the periphery are felt dark because the contrast of light and dark is weak and dark.

  When the illuminance of the central portion P1 is 160 lux and the minimum illuminance value is 5 lux, only the central portion P1 is noticeably bright in the heating chamber 28. On the other hand, since the minimum illuminance at the peripheral corners is clearer and darker than the central part P1, it feels dark.

  On the other hand, when the illuminance of the central portion P1 is 80 lux and the minimum illuminance is 10 lux, not only the central portion P1 feels bright, but also the position of the minimum illuminance at the corner does not feel dark, and the central portion P1 Since the contrast is weaker than that of the example in which the illuminance at the central portion P1 is 160 lux, it spreads over the entire heating chamber 28 and the entire heating chamber 28 feels bright. Therefore, it is easy to see by feeling the inside of the heating chamber 28 bright.

  A transparent glass is used for the glass window 3 of the door 2, and the frame 80 of the door 2 is provided with a hole group 80 g that is 60% or more of the area of the glass window 3 b, and the heating chamber as viewed from the front upper side of the door 2. 28, the four corners of the table plate 24 can be seen, and the illuminance on the surface of the table plate 24 as a mounting surface is 10 lux or more at the lowest illuminance position, and the central portion P1 of the table plate 24 is 80 lux or more. It feels bright. When the table plate 24 is not used, the heating chamber bottom surface 28a is colored in white or ivory, and the table plate 24 described in this embodiment is read as the heating chamber bottom surface 28a.

  The present embodiment has the above configuration, and the operation will be described next.

  A case where an object to be heated is heated by a microwave will be described.

  In the case of microwave heating, the object to be heated is placed on the table plate 24 in the heating chamber 28 and cooking is started.

  In that case, except for the heating chamber back surface 28b and the heating chamber top surface 28c provided with a heating source, the heating chamber bottom surface 28a (in the embodiment, the white table plate 24 used during cooking corresponds), the heating chamber right side surface 28d, and the heating chamber. Three surfaces of the left side surface 28e occupy bright colors. The visibility of the object to be heated placed in the heating chamber 28 is greatly improved by using bright colors for three of the five surfaces constituting the heating chamber 28.

  In addition, by setting the color of the wall surface provided with the illumination unit 500 and the wall surface illuminated by the spread of light from the illumination unit 500 (the wall surface facing the wall surface provided with the illumination unit 500) to a color that reflects light well, Light reflection occurs between the opposing wall surfaces, and the heating chamber 28 can be efficiently brightened. In addition, the light reflection efficiency can be improved by using a bright color for at least one wall surface of the heating chamber bottom surface 28a or the heating chamber back wall surface 28b so as to connect the wall surfaces.

  In addition, by making the color of the heating chamber bottom surface 28a on the traveling side of the light incident from the door 2 a color with good light reflection, the incident light can be efficiently reflected and the heating chamber 28 can be efficiently brightened. it can. Further, by changing the heating chamber bottom wall surface 28b to a bright color instead of the heating chamber bottom surface 28a, the cooking chamber back wall surface 28b that is conspicuous next to the heating chamber bottom surface 28a when viewed from the glass window 3 of the door 2 is provided. By using a bright color, it is possible to obtain an effect close to the effect described above.

  Further, by increasing the number of holes of the frame 80 provided in the door 2 up and down to increase the aperture ratio to 32%, the visibility of the heated object placed in the heating chamber 28 is further improved.

  According to the present embodiment, the temperature rise of the LED can be reduced, the reliability of the LED life is increased, the wide range in the heating chamber 28 is brightened, and the food state of the food to be cooked is easily visible. . During cooking, the LED illumination unit 400 can emit light to illuminate the inside of the heating chamber 28 brightly.

  Alternatively, the front end portion 506 of the light guide portion 504 may be a glossy surface, and may be diffused over a wide range in the heating chamber 28 by a diffusion member instead of the embossing of the front end portion 506. The diffusion member is composed of a transparent member having high heat resistance such as glass, and the surface of the glass 505 opposite to the heating chamber 28 is processed to obtain an effect of diffusing light, such as blasting or dot printing. Is given. Even if the light diffusion treatment is performed, the same effect can be obtained.

  Further, as the diffusing member, for example, a sealing member obtained by performing medium printing on a PET sheet may be used and attached to the irradiation unit 28t. Similar effects can be obtained.

  A transparent glass is used for the glass window 3 of the door 2, and the frame 80 of the door 2 is provided with a hole group 80 g that is 60% or more of the area of the glass window 3 b, and the heating chamber as viewed from the front upper side of the door 2. 28, the four corners of the table plate 24 can be seen, and the illuminance on the surface of the table plate 24 as a mounting surface is 10 lux or more at the lowest illuminance position, and the central portion P1 of the table plate 24 is 80 lux or more Even if the door 2 is closed during cooking, the inside of the bright heating chamber 28 can be seen.

  Further, by making the labor side (door 2 side) of the heating chamber 28 brighter than the back side, the shadow of the object to be heated is directed to the back side of the heating chamber 28, so that the object to be heated from the glass window 3 Visibility is improved. In addition, by making the back side darker than the near side, the generated shadow is made inconspicuous.

  Further, the glass window 3 having a radio wave leakage mechanism is brightened on the glass window 3 side of the heating chamber 28, so that the object to be heated placed on the center side of the heating chamber is illuminated. Makes it easy to see. If the back side is brightened, the space between the object to be heated is darkened, and the position of the object to be heated becomes deep and the image looks dark.

  Easier to see the object to be heated in the heating chamber makes cooking while observing the heating chamber easier, and also allows cooking while grasping the state of the heating chamber and the state of cooking, so high-frequency heating that makes cooking easier Can provide cooker.

2 Door 3b Glass window 12 Grill heating means (heating source)
24 Table plate (mounting surface)
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 28f Heating chamber opening 28f
28t irradiation unit 33 magnetron
80 Frame 80g Hole Group 400 LED Illumination Unit 500 Illumination Unit 501 Substrate Holding Member 502 Printed Circuit Board 504 Light Guide 505 Glass 506 Tip P1 Center

Claims (2)

A heating chamber for heating an object to be heated;
An openable / closable door provided with a glass window having a mechanism for preventing leakage of radio waves, located at the heating chamber opening of the heating chamber;
An illumination unit for illuminating the heating chamber from an irradiation section provided on the right side of the heating chamber or the left side of the heating chamber;
Applying at least one of the right side surface of the heating chamber and the left side surface and bottom surface or back surface of the heating chamber in white or ivory color,
The irradiation unit is arranged on the front side with respect to the depth direction of the heating chamber,
Increasing the number of punching holes that constitute the mechanism for preventing radio wave leakage,
Closing the door and closing the door to see the heating chamber through the group of holes is arranged so that the entire bottom corner is visible,
The high frequency cooking device according to claim 1, wherein a minimum illuminance of the bottom surface of the heating chamber is 10 lux or more, and an illuminance of a central portion of the bottom surface of the heating chamber is 80 lux or more.   The high-frequency cooking device according to claim 1, wherein a white table plate is placed on the bottom surface of the heating chamber instead of white or ivory color on the bottom surface of the heating chamber.

Images