JP2015129596A - heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve quality of water vapor by preventing temperature drop of the water vapor when jetting from a boiler.SOLUTION: Water vapor generation means 43 includes: a boiler body part 43a having a water vapor generation space 103 surrounded by a heating bottom surface 43g and a plurality of heating side surfaces 43f, boiler heating means 89 provided on an outer periphery of the water vapor generation space 103, and a water supply port 104 for supplying water to the water vapor generation space 103; and a boiler lid body 43b in which a jetting port 44 is provided for supplying water vapor to a heating chamber 28 from the water vapor generation space 103 at an upper part of the heating side surface 43f on the heating chamber 28 side out of the plurality of heating side surfaces 43f. A seal material 43e is provided between the boiler body part 43a and the boiler lid body 43b. In the jetting port 44, at a block part 43p provided by protruding to the water vapor generation space 103 side in the water vapor generation space 103, a jetting port inlet 44a is provided, and on the heating chamber 28 side, a jetting port outlet 44b protruding from the heating side surface 43f is provided.

Description

  The present invention relates to a cooking device provided with water vapor generating means for generating water vapor by heating water.

  2. Description of the Related Art A conventional cooking device is known that includes a steam generating unit in addition to a high-frequency heating unit, a grill heating unit, and a hot air oven heating unit, and cooks food with steam.

  For example, in Patent Document 1, in order to improve the steam generation efficiency of the steam generation means 89, the steam generation means 89 includes a lid 62 provided with a steam outlet 44 attached to the side surface of the heating chamber 28, and a steam generation space 103. The heating vessel 61 provided with the water supply port 104 and the heating element 63 is closed with a sealing material 65, and the water vapor generating space 103 is closed (except for the water supply port 104 and the water vapor jet port 44).

JP 2011-247484 A

  Since the temperature of the water vapor jet port 44 of the water vapor generating means 89 used in the conventional cooking device shown in Patent Document 1 is transferred from the heating element 63 through the sealing material 65, the temperature of the water vapor jet port 44 is heated. The temperature of the body 63 arrives with a delay. Therefore, it is conceivable that the temperature of the water vapor outlet 44 decreases due to the influence of the temperature of the water vapor ejected.

  The present invention has been made to solve the above-mentioned drawbacks, and is a heating cooker provided with a heating chamber for storing food, and a steam generating means for supplying steam generated by heating water to the heating chamber. The water vapor generating means supplies water into the water vapor generating space, a water vapor generating space surrounded by a heating bottom surface and a plurality of heating side surfaces, a boiler heating means provided on the outer periphery of the water vapor generating space, and A boiler body provided with a water supply port, and a boiler lid provided with a jet outlet for supplying water vapor from the water vapor generation space to the heating chamber above the heating side of the heating chamber among the plurality of heating side surfaces And a sealing material is provided between the boiler main body and the boiler lid, and the jet outlet is provided at the jet outlet at a block portion that protrudes toward the steam generation space in the steam generation space. When, Serial in the heating chamber side is provided with a the spout outlet that protrudes from the heated side.

  ADVANTAGE OF THE INVENTION According to this invention, the temperature fall of the water vapor | steam outlet of a water vapor | steam generation means can be prevented, and the quality of water vapor | steam can be improved.

It is the perspective view which looked at the main body of the heating cooker of one Example from the front side. It is the perspective view which looked at the main body of the heating cooker from the back side. It is AA sectional drawing of FIG. It is a perspective view of the state which opened the door of the heating cooker of one Example, and was able to see the inside of a main body. It is the perspective view which looked at the state which removed the outer frame from the main body of the heating cooker from the back side. It is a longitudinal cross-sectional view which passes along the jet nozzle of the water vapor | steam generation means of the same heating cooker. It is a perspective view inside a boiler main-body part installed in the heating cooker of one Example. It is a perspective view of the outer side of the boiler main-body part. It is a perspective view inside the boiler lid part. It is a perspective view of the outer side of the boiler lid part. It is explanatory drawing of a display part with a touch panel provided in the door of the heating cooker, and an operation key group. It is a block diagram showing the control means of the heating cooker.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  1 to 5, the main body 1 of the heating cooker includes a heating chamber 28 that accommodates an object 130 to be heated.

  The door 2 opens and closes in order to put the cooking object 130 in and out of the heating chamber 28, and the microwave used when the cooking object 130 is heated by closing the door 2 to seal the heating chamber 28. Is prevented, the heater heat and superheated steam, which will be described later, are contained, and heating can be performed efficiently.

  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 attached to the door 2 so that the state of the food being heated can be confirmed, and uses glass that can withstand high temperatures due to heat generated by a heater or the like.

  An operation panel 4 is provided over the entire lateral width of the door 2 on the lower front side of the door 2, and an LED display unit 105 is provided on the upper portion of the operation panel 4. An operation unit 6 is provided on the operation panel 4, and the operation unit 6 includes a display unit 70 with a touch panel in a substantially central portion, and four operations arranged in two horizontal rows adjacent to the right side of the display unit 70 with a touch panel. An operation key group 60 including keys, a start key 6b for inputting the start of cooking at the right end, and a tear key 6c for canceling cooking are arranged below the start key 6b.

  The start key 6b and the tear-off key 6c use mechanical switches.

  The display unit 70 with a touch panel is provided on the operation panel 4 below the front surface of the door 2, provided on a heating range upper surface 28 e of the heating chamber 28, a range heating means 77 (FIG. 12) that heats the cooking object 130 with microwaves. The grill heating means 12 for heating the food to be cooked by the heater, the steam unit 43a for heating the food to be cooked 130 by steam (FIG. 12), and hot air heaters 14a and 14b provided above and below the heating chamber inner wall surface 28b. A touch panel 70a (shown in FIG. 1) is provided with a hot air unit 11 for selecting a desired heating means from an oven heating means for heating the heating chamber 28 with the generated hot air and inputting cooking conditions such as a heating time and a menu for bread making. 11) and the LCD display unit 70b (FIG. 11) for displaying the content input from the touch panel 70a and the cooking progress state. It is made.

  The water tank 42 is a container for storing water necessary for producing saturated steam or superheated steam. The water tank 42 is provided on the lower side of the front surface of the main body 1, and is configured to be detachable from the front surface of the main body 1. Effluent can be easily drained.

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

  The rear plate 10 forms the rear surface of the cabinet described above. The external exhaust duct 18 is attached to the upper part of the rear plate 10, and the steam exhausted from the cooking object 130 and the main body 1 are installed inside the external exhaust duct 18. An exhaust hole 36 for discharging cooling air (waste heat) 39 after cooling the internal components is provided.

  The external exhaust duct 18 discharges the cooling air (waste heat) that has passed through the exhaust hole 36 to the outside of the main body 1. The exhaust is discharged from the external exhaust port 8 of the external exhaust duct 18, and the exhaust discharge direction Exhausts toward the top of the body 1 and to the front side. The exhaust direction of the exhaust is directed upward and to the front side, so that even when the rear surface is set close to the wall surface, the wall surface is not contaminated by the exhaust gas.

  The machine room 20 is provided in a space between the heating chamber bottom surface 28a and the bottom plate 21 of the main body 1, and a magnetron 33 for heating food on the bottom plate 21, a waveguide 47 connected to the magnetron 33, A control board 23, other various components described later, a fan device 15 for cooling these various components, and the like are attached.

  The heating chamber bottom surface 28a has a substantially concave central portion, in which the rotating antenna 26 is installed, and the microwave energy radiated from the magnetron 33 is output from the waveguide 47 to the output shaft of the rotating antenna driving means 46. It flows into the lower surface of the rotating antenna 26 through the opening 47a through which 46a passes, and is diffused by the rotating antenna 26 and 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 fan device 15 is rotated by driving the motor, and the cooling air 39 generated by the fan device 15 cools the magnetron 33, the inverter board 22, the weight detecting means 25, etc. in the machine room 20 to generate heat. 28 flows between the outside of the frame 28 and the outer frame 7 and between the hot air case 11 a and the rear plate 10, passes through the exhaust hole 36 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. Is done.

  The hot air unit 11 is attached to the rear part of the heating chamber 28. The hot air unit 11 is provided with a hot air case 11a on the rear side of the heating chamber inner wall surface 28b, and a hot air fan between the heating chamber inner wall surface 28b and the hot air case 11a. 32 and the hot air heater 14 are provided so as to be located on the outer peripheral side thereof, 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. .

  A hot air fan 32 that efficiently circulates the air in the heating chamber 28 is attached in the hot air unit 11, and a hot air intake hole 31 and a hot air blowing hole 30 that serve as air passages are provided in the heating chamber inner wall surface 28 b. Yes.

  The hot air fan 32 rotates by driving a hot air motor 13 attached to the outside of the hot air case 11 a and heats the air circulating in the hot air heater 14. Therefore, it becomes possible to send saturated steam, which is jetted from the outlet 44 described later, into the heating chamber 28, as superheated steam by heating the hot air heater 14, and send it to the heating chamber 28.

  On the back side of the top surface of the heating chamber 28, a grill heating means 12 made of a heater is attached. The grill heating means 12 is formed in a flat shape by winding a heater wire around a mica plate, and pressing and fixing the mica plate against the back side of the top surface of the heating chamber 28 to heat the top surface of the heating chamber 28 so that the food in the heating chamber 28 is It is baked by radiant heat.

  The heating chamber bottom face 28a is provided with a plurality of weight detection means 25, for example, a right weight sensor 25a, a left weight sensor 25b on the front right and left, 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 used for placing the object to be cooked 130, has heat resistance so that it can be used for both heater heating and microwave heating, has good microwave permeability, and is hygienic. It is molded from materials such as porcelain that have no problems.

  The table plate 24 has upper, middle, and lower multi-stages (on the left and right side surfaces of the heating chamber 28) in order to bring the cooked object 130 close to the grill heating unit 12 as appropriate when heated using the grill heating unit 12. It is used by being placed on a three-stage shelf 27 in the figure.

  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 detecting means a85 is provided at a position where it is not directly affected by the hot air blown into the heating chamber 28 from the hot air blowing holes 30 of the grill heating means 12 and the hot air unit 11.

  The steam unit 43a (FIG. 12) includes a water vapor generating means 43 and a pump means 87.

  The water vapor generating means 43 has a substantially horizontally long shape and is attached laterally to the outer surface of the left side surface 28 c of the heating chamber, and the jet port 44 through 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 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 through the pipe 45 by driving the pump means 87. The supplied water passes through the pipe 40 and is heated and boiled by the water vapor generating means 43 to be converted into water vapor and 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. 12) 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 amount of water sent in one operation of the pump means 87 is approximately the amount of water that does not accumulate due to a drop in the temperature of the steam generating means 43 due to the inflowing water when a 600 W heater is used for the boiler heating means 89. 0.4 ml.

  Next, the detailed structure of the water vapor generating means 43 will be described with reference to FIGS.

  In these drawings, the water vapor generating means 43 includes a boiler main body 43a having a concave water vapor generating space 103 therein, and a boiler lid 43b that closes the concave water vapor generating space 103 of the boiler main body 43a. ing. And both the boiler main-body part 43a and the boiler cover part 43b are shape | molded by the substantially horizontally long shape so that the one side of a longitudinal direction may become a substantially semicircle shape with the metal material which is hard to rust, such as an aluminum casting product.

  The boiler heating means 89 constituting the boiler heater is a part for heating the water vapor generating means 43, and is obtained by bending the sheathed heater into a substantially U shape, and the water vapor generating space 103 is located inside the bent substantially U shape. Thus, it is embedded by casting within the outer periphery of the boiler body 43a.

  Therefore, the surface of the heating surface 43h (the heating bottom surface 43g and the plurality of heating side surfaces 43f) constituting the water vapor generation space 103 can be efficiently heated.

  Further, the boiler main body 43 a is integrally provided with a cylindrical water supply port 104 for supplying water into the water vapor generation space 103, and a pipe 40 shown in FIG. 5 is connected to the outside of the water supply port 104. Yes. The inner diameter of the water supply port 104 is increased toward the water supply outlet 104a on the steam generation space 103 side.

  The boiler lid portion 43b was formed at four locations in the longitudinal direction on the boiler lid portion 43b after the sealant 43e was applied to the groove 43d provided along the outer peripheral portion of the water vapor generation space 103 of the boiler body portion 43a. A screw generating hole 43n and a boiler main body 43a are fixed to the boiler main body 43a by tightening screws (not shown) on screw seats 102 formed at four positions in the longitudinal direction in the longitudinal direction, and a water vapor generating space of the boiler main body 43a. 103 is blocked.

  The boiler lid portion 43b has a spout 44 for supplying water vapor from the water vapor generating space 103 to the inside of the heating chamber 28 outside the water vapor generating means 43 above the heating side surface 43f on the heating chamber 28 side among the plurality of heating side surfaces 43f. Is provided.

  The jet outlet 44 is provided so that the outer side of the water vapor generating means 43 protrudes in a cylindrical shape, and the jet outlet 44 b protrudes into the heating chamber 28. On the other hand, the steam generation space 103 side is a block having a step 43r between the heating side surface 43f and the flat surface 43m that protrudes in the steam generation space 103 substantially in the horizontal direction (h) from the heating side surface 43f of the boiler lid 43b. A portion 43p is provided, and a jet port 44a of the jet port 44 is provided on a flat surface 43m of the block portion 43p. By providing the block portion 43p, the heat capacity of the jet port 44 is increased.

  The spout inlet 44a has a long hole shape, and is provided with a slope 44c that is inclined upward from the spout inlet 44a toward the spout outlet 44b. Moreover, it was set as the structure where the cross-sectional area in the nozzle outlet 44b side is larger than the cross-sectional area in the heating chamber side edge part of the inclination 44c which is the cross-sectional area of the nozzle 44.

  (H) From various experimental results, it is desirable to set the dimension to 2.5 to 5 mm, which can suppress the ejection of water that is not vaporized into water vapor from the ejection port 44 into the heating chamber 28. .

  The water injected from the water supply port 104 is heated by the heating bottom surface 43g and the heating side surface 43f constituting the water vapor generation space 103 and is vaporized into water vapor, and from the jet port 44 provided on the heating side surface 43f, steam generation means is provided. Water vapor is discharged outside 43.

  The present embodiment is configured as described above. Next, the steam generation operation of the steam generation means 43 will be described.

  Note that high-frequency cooking using the magnetron 33, grill cooking using the grill heating means 12, hot-air oven cooking using the hot air unit 11, steamed cooking using steam generated by heating water is known, The explanation about cooking is omitted.

  First, water is put into the water tank 42 before heating. Next, when electric power is supplied to the boiler heating means 89, heating of the water vapor generating means 43 is started. The control means 151 detects the temperature of the water vapor generation means 43 by the temperature detection means b88, and controls the boiler heating means 89 and the pump means 87 based on the detection result.

The detected temperature is equal to or higher than a certain temperature (a temperature at which water can be heated to steam, in this case 17
When the temperature reaches 0 ° C., the pump means 87 is driven, and water is supplied from the water tank 42 through the pipe 45 to the water vapor generation space 103 from the water supply port 104 of the boiler body 43a.

  The water supplied to the steam generation space 103 is heated by the heating bottom surface 43g and the heating side surface 43f heated by the boiler heating means 89, is instantly vaporized, and is converted into water vapor and sent from the ejection port 44 to the heating chamber 28.

  When water touches the high temperature part, a water vapor film is generated between the water and the high temperature part, heat conduction is deteriorated, and a phenomenon that water droplets roll on the water vapor film occurs.

  The same phenomenon also occurs in the water vapor generating means 43. When water is supplied to the water vapor generating space 103, the temperature of the heating bottom surface 43g and the heating side surface 43f reaches about 170 ° C. Therefore, at the moment when the supplied water comes into contact with the heating bottom surface 43g or the heating side surface 43f, a water vapor film is generated between the water droplet and the heating bottom surface 43g or the heating side surface 43f. Until it evaporates, the water is in the form of water droplets, causing a phenomenon of rolling on the heating bottom surface 43g and the heating side surface 43f.

  This water droplet sometimes rolls up on the heating side surface 43f.

  However, the boiler lid portion 43b provided with the spout 44 is provided with a flat surface 43m that protrudes in a substantially horizontal direction by the dimension (h) from the heating side surface 43f in the water vapor generation space 103, and between the flat surface 43m and the heating side surface 43f. A jet outlet 44a of the jet outlet 44 is provided on a flat surface 43m of the block 43p provided to form a step 43r. The jet inlet 44a is in the shape of a slot, and the upper side from the jet outlet 44a toward the jet outlet 44b is provided. Since the inclined surface 44c inclined in the direction is provided, the above-described water droplet cannot get over the dimension (h) and is not discharged from the nozzle 44 to the outside of the boiler 43.

  Further, even if the scale accumulates on the heating bottom surface 43g and the heating side surface 43f and the heat conduction is deteriorated, the time until the water droplets are vaporized and become water vapor is slightly increased, and the water droplets reach the flat surface 43m provided with the outlet 44a. The step 43r having the dimension (h) cannot be overcome.

  Further, since the step 43r is formed in the entire substantially horizontally long direction of the block portion 43p, the above-described water droplets cannot get over the step 43r even if moved in the horizontal direction, so that the water droplets are not vaporized in the vicinity of the ejection port 44. Since the scale accumulates on the step 43r, the heating bottom surface 43g, and the heating side surface 43f, the jet port 44 is not easily blocked by the scale.

  Further, the length of the protruding dimension (h) of the step 43r can be increased according to the amount of accumulated scale, and the performance of the water vapor generating means 43 is not deteriorated by increasing the length.

  Further, by providing a block 43p at the jet port 44 and increasing the heat capacity of the jet port 44, it becomes possible to prevent a drop in the temperature of the jet port 44 when water vapor passes through the jet port 44. It is possible to prevent the temperature of the water vapor from decreasing and supply high-temperature water vapor to the heating chamber 28.

  Then, by providing a slope 44c inclined upward from the jet inlet 44a to the jet outlet 44b provided in the block 43p, even if a water droplet gets over the step, it is provided in the block 43p having a large heat capacity. If the water droplet does not rise further upward on the inclined surface 44c, the water droplet does not reach the jet outlet 44b. Therefore, the water droplet is vaporized in the block portion 43p having a large heat capacity, and the water droplet is difficult to jump out of the jet outlet 44. Furthermore, the edge portion 44d of the jet inlet 44a formed by the flat surface 43m and the inclined surface 44c has a structure in which the scale is difficult to adhere to the edge portion 44d by being an angle larger than a right angle.

  In addition, even when the steam cools and becomes water droplets, the inclined surface 44c that is inclined upward from the jet inlet 44a to the jet outlet 44b is provided, so that the steam generation space does not hang down in the heating chamber 28. It also works to return to 103.

  In the above-described embodiment, the water vapor generating means 43 has a substantially horizontally long shape and is attached to the outer surface of the heating chamber 28 in the horizontal direction. However, it is not necessarily required to have a horizontally long shape and to be attached to the outer surface of the heating chamber 28 in the horizontal direction.

  The point is that a flat surface 43m protruding by the dimension (h) is provided from the heating side surface 43f to the steam generation space 103 side, and a flat surface 43m of the block 43p provided by forming a step 43r between the flat surface 43m and the heating side surface 43f. In the posture in which the spout inlet 44a is provided and the water vapor generating means 43 is attached to the heating chamber 28, a slope 44c that is inclined upward from the spout inlet 44a toward the spout outlet 44b may be provided.

  As described above, the temperature of the water vapor ejected from the water vapor generating means 43 can be prevented from being lowered, and the quality of the water vapor can be improved.

DESCRIPTION OF SYMBOLS 1 Main body 28 Heating chamber 43 Water vapor | steam generation means 43a Boiler main-body part 43b Boiler lid part 43f Heating side surface 43g Heating bottom face 43m Plane 44 Spout 44a Spout outlet 44b Spout outlet 44c Slope 89 Boiler heating means 103 Steam generating space 104 Water supply port

Claims (3)

A heating chamber for storing food,
Steam generating means for supplying steam generated by heating water to the heating chamber,
The water vapor generating means includes
A boiler body provided with a steam generation space surrounded by a heating bottom surface and a plurality of heating side surfaces, boiler heating means provided on the outer periphery of the steam generation space, and a water supply port for supplying water into the steam generation space; ,
A boiler lid provided with a jet outlet for supplying water vapor to the heating chamber from the water vapor generation space above the heating side of the heating chamber among the plurality of heating side surfaces;
Furthermore, a seal material is provided between the boiler body and the boiler lid,
The spout is
In the water vapor generation space, a spout inlet provided in a block portion protruding toward the water vapor generation space,
On the heating chamber side, an outlet outlet provided in a cylindrical shape protruding from the heating side surface,
A cooking device characterized by comprising. The heating cooker according to claim 1, wherein
A cooking device according to claim 1, wherein the lower surface of the spout is provided with an inclination such that the steam generation space side is low and the heating chamber side is high. The cooking device according to claim 2,
The cooking device according to claim 1, wherein a cross-sectional area of the jet outlet is larger than a cross-sectional area of the inclined end portion of the heating chamber.