JP6710888B2 - Heating cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heating cooker provided with a discharge port for discharging cooling air for cooling the inside of a refrigerator to the outside of the refrigerator.

As a heating cooker of this type, for example, in Patent Document 1, as a cooling structure inside the main body, one cooling fan is arranged in an outdoor lower space of a cooking chamber, and cooling air from a blower fan is supplied to the same outdoor lower part. In addition to blowing air to the control board of the microwave generator and magnetron installed in the space, the air is guided to the outdoor space of the cooking chamber by the air duct, and is blown to the infrared sensor and door lock mechanism provided in the outdoor space. A microwave oven is proposed.

However, the air that has cooled the heat generating portion inside the microwave oven becomes hot because it absorbs heat from the heat generating portion. Although Patent Document 1 does not describe a path for exhausting high-temperature air to the outside of the microwave oven, in this type of microwave oven, high-temperature air is discharged from an opening formed in a side surface portion or a rear surface portion of the main body. May be discharged.

JP, 2013-79744, A

When storing such a microwave oven in the kitchen furniture installed in the kitchen, there is also a demand for reducing the space of the microwave oven storage portion formed in the kitchen furniture. On the other hand, there is also a demand for the microwave oven to secure a certain amount of storage capacity or more. Therefore, when the microwave oven is stored in the kitchen furniture, the side surface, back surface, and upper surface of the microwave oven cabinet often come close to the inner surface of the kitchen furniture. In such a case, if hot air is discharged from the side surface or the back surface of the microwave oven, the hot air may hit the kitchen furniture, and the kitchen furniture may be damaged. In addition, there is a problem that high-temperature air accumulates in the storage part of the kitchen furniture, and the cooling efficiency of the microwave oven decreases.

Therefore, in view of the above problems, it is an object of the present invention to provide a heating cooker that can be stored in a space-saving kitchen furniture while ensuring the storage capacity of the heating cooker.

According to the first aspect of the present invention, a main body having a cooking chamber for accommodating an object to be cooked and an outer shell body covering the main body are provided, and internal air is discharged to the outside at a front end portion of an upper surface of the outer shell body. An opening is provided , a ventilation space for air to flow is formed between the main body and the outer shell, the ventilation space communicates with the opening, and the upper part of the main body is connected to the cooking chamber from the cooking chamber. communication hole is formed for discharging air, the communication hole and the vent passage communicating with said opening is formed, said air passage space der Rukoto independent no movement of air between the ventilation space Is characterized by.

The invention of claim 2 is characterized by comprising an opening/closing portion for opening/closing the communication hole.

According to a third aspect of the invention, the ventilation passage is formed with an obstacle portion for increasing a distance in which air flows from the communication hole to the opening portion.

The invention of claim 4 is characterized in that the opening is elongated in the left-right direction.

According to the invention of claim 1, the air inside the heating cooker can be discharged from the front end portion of the upper surface to the outside of the heating cooker. Further, the air inside the heating cooker can be discharged to the outside of the heating cooker from the opening through the ventilation space. Further, the air in the cooking chamber can be discharged to the outside of the heating cooker from the opening through the ventilation path.

According to the invention of claim 2 , the discharge of the air in the cooking chamber to the outside of the cooking device can be controlled by the opening/closing part.

According to the invention of claim 3 , the temperature of the air flowing through the ventilation passage can be lowered, and the high temperature air can be prevented from being discharged from the opening.

According to the invention of claim 4 , it is possible to increase the opening area of the opening while suppressing the height of the heating cooker.

It is an appearance perspective view of a microwave oven showing a first embodiment of the present invention. It is the figure seen from the front front when the door is opened. FIG. 3 is a vertical sectional view seen from the side surface of the same. It is the figure seen from the rear surface rear of the same as the above with a cabinet and a back plate of an oven removed. It is a front view of the main body in the state which removed the cabinet same as the above. It is a rear view which shows a hot air unit and a transmission mechanism same as the above. It is a principal part front view of the hot air unit removed from the back wall of the cooking chamber. It is a figure which shows the positional relationship of a cooking chamber and a heating chamber same as the above. FIG. 3 is a vertical cross-sectional view of a main part of the microwave generator and its periphery as seen from the side. FIG. 4 is a bottom view of the main body of the microwave oven according to the present embodiment with the cabinet, oven bottom plate, and the like removed. It is the figure seen from the right side in the state which removed the cabinet same as the above. FIG. 4 is a right side view of the main body with the cabinet and the like removed in the same. It is a rear view of a cabinet same as the above. It is a right view of a cabinet same as the above. It is a left side view of a cabinet same as the above. FIG. 3 is a block diagram showing the main electrical configuration of the same. It is a rear side perspective view in the state which removed the cabinet same as the above. It is a sectional view showing a damper etc. same as the above. It is a longitudinal cross-sectional view seen from the left side. It is a right side view of the state same as the above stored in the kitchen furniture. It is a front side perspective view of the state same as the above stored in a kitchen furniture.

Hereinafter, preferred embodiments of a heating cooker according to the present invention will be described with reference to the accompanying drawings. Note that common reference numerals are given to common portions throughout these drawings.

1 to 21 show an embodiment in which the heating cooker of the present invention is applied to a microwave oven. First, the overall configuration of the microwave oven will be described with reference to FIGS. 1 to 6. 1 is a main body configured in a substantially rectangular box shape, and the main body 1 is an outer shell body that covers the outer shell of the product microwave oven. , A cabinet 2 made of metal. Further, 3 is a door provided on the front surface of the main body 1 and capable of opening and closing.

At the upper part of the door 3, there is provided a handle 4 for opening and closing the hand for opening and closing the vertically open door 3, and at the lower part of the door 3, an operation panel section 5 for display, notification and operation. Is equipped with. The operation panel section 5 is provided with an operation means 7 for enabling various operation inputs regarding heating and cooking, in addition to the display means 6 for displaying the setting contents of cooking and the progress status. Although not shown, an operation panel PC (printed circuit) board is arranged inside the door 3 on the rear side of the operation panel unit 5 for controlling the display unit 6 and the operation unit 7.

A water supply cassette 8 and a water receiver 9 which are detachable from the front surface of the main body 1 are arranged at the bottom of the main body 1. The water supply cassette 8 is a bottomed container for containing water that is liquid as a supply source of steam generated from a steam generator (not shown). The water receiver 9 is a bottomed container that receives food waste, water droplets, steam, and the like from the main body 1.

The cabinet 2 forming the left and right side surfaces and the upper surface of the main body 1 includes an oven front plate 12 forming the front surface of the main body 1 and a rear surface of the main body 1 so as to cover the main body 1 and then the oven bottom plate 11 forming the bottom surface of the microwave oven. It is provided between the back plate 13 of the oven to be formed. Further, the main body 1 is provided with a cooking chamber 14 that accommodates the food S to be cooked therein, and a thermistor 15 that is a temperature detecting element that detects the temperature of the cooking chamber 14. The front surface of the cooking chamber 14 reaches the front plate 12 of the oven and has an opening for taking in and out the food S to be cooked. The opening is opened and closed by the door 3.

As shown in FIGS. 10 to 12, between the outer surface of the cooking chamber 14 and the inner surface of the cabinet 2, a lower outdoor space 32 as a ventilation space, an upper outdoor space 161, left and right outdoor side spaces 162, and an outdoor rear part. Spaces 163 are formed respectively. The lower outdoor space 32 is between the bottom wall 14b and the inner surface of the cabinet 2, the upper outdoor space 161 is between the ceiling wall 14a and the inner surface of the cabinet 2, and the left and right outdoor space spaces 162 are the left side wall 14c and the right side wall 14d. The exterior rear space 163 is formed between the interior surface of the cabinet 2 and the interior rear surface 163 between the back wall 14e and the interior surface of the cabinet 2. The outdoor lower space 32 communicates with the outdoor space 162 and the outdoor rear space 163, and allows air to flow. Further, the outdoor upper space 161 communicates with the outdoor side space 162 and the outdoor rear space 163 so that air can flow. An exhaust duct 81 is formed on the front side of the upper surface of the cabinet 2, and the exhaust duct 81 communicates with the outdoor upper space 161. The exhaust duct 81 is formed by the left and right side walls 82 and the upper wall 83. Since the side wall 82 is widened in the vertical direction toward the front, the upper wall 83 is inclined upward toward the front. .. At the front end of the exhaust duct 81, elongated openings 84 are formed on the left and right. The height H of the exhaust duct 81 shown in FIG. 20 can be set arbitrarily, but by lowering the height H, the height of the microwave oven can be suppressed. In this embodiment, the height H of the exhaust duct 81 is set to 29.5 mm. On the other hand, the lateral width W of the exhaust duct 81 can also be set arbitrarily. By increasing the lateral width W, the opening 84 becomes larger and the amount of air discharged can be increased. The width W of the exhaust duct 81 in this embodiment is 456 mm.

The peripheral wall forming the cooking chamber 14 includes a ceiling wall 14a, a bottom wall 14b, a left side wall 14c, a right side wall 14d, and a back wall 14e. The back wall 14e of the cooking chamber 14 is provided with a suction port 16 in the center thereof, and a plurality of hot air outlets 17 are provided around the suction port 16. Further, facing the dome-shaped ceiling wall 14a serving as the upper wall surface of the cooking chamber 14, an upper heater 18 for a grill that radiatively heats the food S to be cooked from above the cooking chamber 14 is provided at the upper portion of the main body 1. In addition, a microwave generator 19 including a magnetron 64 (see FIG. 10) is provided in the outdoor lower space 32 that is the bottom of the main body 1 in order to supply microwaves that are radio waves into the cooking chamber 14. As a result, the cooking object S housed in the cooking chamber 14 is grill-heated from above by the heat radiation accompanying the energization of the upper heater 18, and the microwave generator 19 is energized so that the inside of the cooking chamber 14 is heated. Microwaves are radiated to the to-be-cooked food S housed in, and the to-be-cooked food S is heated in a microwave oven.

The left side wall 14c and the right side wall 14d of the cooking chamber 14 are provided with a pair of upper and lower shelves supports 22 for accommodating and holding a metal rectangular plate 21 in a suspended state inside the cooking chamber 14. There is. The square plate 21 used here has a bottomed concave shape with an open top surface and the other is a non-perforated accommodating portion 21A, and a flange portion 21B extending horizontally outward from the upper end of the accommodating portion 21A. To be done. Further, the flange portion 21B is formed with a vent hole 21C that allows hot air to flow through the square plate 21. FIG. 2 shows a state in which the flange portion 21B of the square plate 21 is placed on the lower shelf support 22 inside the cooking chamber 14 and the food S is placed on the accommodation portion 21A. The plate 21 may be placed only on the upper shelf support 22, or the two square plates 21 may be placed on the upper and lower shelf supports 22, respectively. Instead of the square plate 21, another grill (not shown) is used. ) And other accessories can also be stored and held.

Reference numeral 24 denotes a hot-air unit for heating the oven, which is provided inside the main body 1 from outside the cooking chamber 14 to below the cooking chamber 14. The hot air unit 24 includes a convex casing 26 attached to the back wall 14e, a hot air heater 27 for heating air, a hot air fan 28 for sending heated air into the cooking chamber 14 for circulation, and a hot air fan 28. An electric hot air motor 29 that rotates in a predetermined direction and a transmission mechanism 30 that transmits the driving force from the hot air motor 29 to the hot air fan 28 are generally configured. A hot-air heater 27 and a hot-air fan 28 are provided in a heating chamber 31 formed outside the cooking chamber 14 as an internal space between the inner wall 14e and the casing 26, while the inside of the main body 1 is provided. A hot air motor 29 is disposed in an outdoor lower space 32 between the cooking chamber 14 and the oven bottom plate 11 formed in the above. Then, an oven rear plate 13 is arranged at the rear portion of the main body 1 so as to cover the entire hot air unit 24 from the rear outside.

The hot air fan 28 of the present embodiment is provided as a so-called centrifugal fan that discharges air taken in in the axial direction in a radial direction perpendicular to the axial direction by centrifugal force during rotation, and the tubular hot air heater 27 is a hot air fan. It is arranged so as to surround 28 radial directions. As the hot air heater 27 which is also a heat generating portion, for example, a sheath heater, a mica heater, a quartz tube heater, a halogen heater or the like is used. The suction port 16 and the hot air blowing port 17 described above function as a ventilation part that connects the cooking chamber 14 and the heating chamber 31.

In the present embodiment, when the hot air fan 28 is driven to rotate in accordance with the energization of the hot air motor 29, the air sucked from the inside of the cooking chamber 14 through the suction port 16 blows out in the radial direction of the hot air fan 28 and is energized. The hot air is heated by the hot air heater 27, passes through the hot air outlet 17, and the hot air is supplied into the cooking chamber 14. Thereby, a path for circulating hot air inside and outside the cooking chamber 14 is formed, and the food S to be cooked inside the cooking chamber 14 is convection-heated with hot air. Furthermore, the left side wall 14c of the cooking chamber 14 is provided with a steam ejection hole 33 communicating with the steam generator. Although not shown, the steam generator provided inside the main body 1 is a metal-made hollow evaporation container, an evaporation heater such as a sheath heater attached to the evaporation container, or water from the water supply cassette 8 in the evaporation container. It has a plurality of steam ejection holes 33 communicating with the inside of the evaporation container. As a result, during operation of the steam generator, the water from the water supply cassette 8 is fed into the evaporation container and heated to a predetermined temperature, so that saturated steam or superheated steam is introduced from the steam ejection holes 33 into the cooking chamber 14. Is supplied, and the cooking target S put in the cooking chamber 14 is steam-cooked.

The hot air fan 28 is configured by arranging a plurality of blades 35 radially around the shaft 34, with the shaft 34 serving as the rotation axis thereof as the center. The base end of the shaft 34 projects toward the rear of the main body 1 to the outside of the heating chamber 31, and a driven pulley 36B is attached and fixed thereto. The hot-air motor 29 has a drive-side pulley 36A attached and fixed to a rotatable motor shaft 37 protruding rearward of the main body 1. An endless belt 38 is suspended between the pulleys 36A and 36B, and a transmission mechanism 30 including the pulleys 36A and 36B and the belt 38 connects the hot air fan 28 and the hot air motor 29. Although not shown, the cross section of the belt 38 may have various shapes such as a rectangular shape or a trapezoidal shape.

The transmission mechanism 30 further includes a support body 41 for pivotally supporting the shaft 34 of the hot air fan 28 at a predetermined position. The support body 41 surrounds the side portion of the belt 38 and is attached and fixed to the rear outer surface of the casing 26, and rotates the shaft 34 and a case member 42 into which the shaft 34 of the hot air fan 28 and the motor shaft 37 of the hot air motor 29 are inserted. In order to support it possible, it is constituted by a holder member 43 which partially covers the pulley 36B and is attached and fixed to the case member 42. Particularly, the case member 42 of the present embodiment integrally forms the leg portion 44 extending downward from the bottom wall 14b of the cooking chamber 14, and the bottom surface of the leg portion 44 is placed on the oven bottom plate 11 of the main body 1. By supporting the rear part of the cooking cabinet 14 with the legs 44, a lower space 32 having a size large enough to accommodate the hot air motor 29 is formed between the cooking chamber 14 and the oven bottom plate 11. The case member 42 is provided with a non-contact detection sensor 45 arranged in proximity to the pulley 36A in order to detect the rotation speed of the hot air fan 28.

As shown in FIG. 4, the shaft 34 of the hot air fan 28 is arranged substantially at the center of the back wall 14e of the cooking chamber 14 by the transmission mechanism 30, while the hot air motor 29 and its motor shaft 37 are disposed in the cooking chamber 14. The case member 42 is arranged below the bottom wall 14b, which is the bottom wall surface, on one side, and the case member 42 is provided along a straight line connecting the shaft 34 and the motor shaft 37. As described above, the hot air fan 28 and the hot air motor 29 are provided at positions separated from each other inside the main body 1, but the transmission from the hot air motor 29 is performed by the transmission mechanism 30 in which the pulleys 36A and 36B and the belt 38 are combined. The driving force can be smoothly transmitted to the hot air fan 28. Further, by sufficiently separating the hot air motor 29 from the cooking chamber 14, the heat effect from the cooking chamber 14 can be prevented.

In addition, the vertically-opening door 3 that covers the opening of the cooking chamber 14 is rotatable at the lower front side of the main body 1 by a pair of left and right movable hinge mechanisms 46 that penetrate the oven front plate 12 and are provided in the main body 1. Supported. Further, in order to allow the inside of the cooking chamber 14 to be visually recognized when the door 3 is closed, an interior panel 48, which is a transparent window member such as glass, is arranged inside the door member 47 which forms the outer shell of the door 3. Is set up.

Next, the detailed configuration of the microwave oven will be described with reference to FIGS. 7 to 19. First, the configuration of the hot air unit 24 will be described with reference to FIGS. 7 and 8. In each of these drawings, the hot air heater 27 has a nichrome wire (not shown) as a heating element inside the metal heat dissipation pipe 51. Disk-shaped fins 52 are arranged at predetermined intervals on the outer peripheral surface of the heat radiation pipe 51. As a result, inside the heating chamber 31, the air discharged from the rotating hot air fan 28 is blown onto the fins 52, and the air is efficiently turned into hot air.

The casing 26 is provided with a heater mounting portion 53 that allows the hot air heater 27 to be inserted into the inside and outside of the heating chamber 31 in a sealed state. The heater attachment portion 53 is arranged not at the side portion of the heating chamber 31 but at the lower portion thereof so that the width dimension Wk of the heating chamber 31 can be reasonably expanded to approach the width dimension Wm of the cooking chamber 14. Further, although not shown in these figures, the suction port 16 is arranged at a position facing the hot air fan 28 in the back wall 14e of the cooking chamber 14, and is located in the radial direction of the hot air fan 28. A plurality of hot air outlets 17 are provided.

Particularly, in the present embodiment, the heating chamber 31 is widened to the left and right as much as possible so that the width Wk of the heating chamber 31 approaches the width Wm of the cooking chamber 14, and the outside of the hot air heater 27 is seen from the center of the hot air fan 28. On the other hand, the hot air outlet 17 is provided near the left and right ends of the heating chamber 31. As a result, the hot air generated by the hot air unit 24 is spread from the hot air outlet 17 to both corners of the cooking chamber 14 in a wide range without rotating the hot air fan 28 in the forward and reverse directions, and uniform oven heating is realized. it can. Both ends of the hot air heater 27 are drawn out of the heating chamber 31 for energization and connected to other electric parts.

The hot air unit 24 of this embodiment has a configuration in which hot air at a maximum temperature of 350° C. is supplied into the cooking chamber 14 during its operation. Therefore, in combination with coating the inner surface of the cooking chamber 14 with the ceramic coating film, far infrared rays R can be effectively radiated from the entire inner surface of the cooking chamber 14 except the door 3. Then, by combining the radiation of the far infrared rays R and the convection of the hot air F described above, for example, when preheating the oven heating, the heating time until the temperature in the cooking chamber 14 reaches 200° C. is reduced to about 5 minutes. In addition to being quick, it is possible to suppress uneven baking of the food S in the cooking chamber 14 and to bake it beautifully.

Next, a detailed configuration of the microwave generator 19 and its periphery will be described based on FIG. The bottom wall 14b of the cooking chamber 14 is configured by covering the upper surface opening of the concave antenna housing portion 62 formed in the metal plate member 61 with a bottom plate 63 such as a ceramic plate that can transmit microwaves. The metal plate material 61 that is not transparent to microwaves integrally forms not only the peripheral portion of the bottom wall 14b but also the left side wall 14c, the right side wall 14d, and the back wall 14e. The inner surface of the is entirely formed of a material that is not transparent to microwaves.

In addition to the magnetron 64 that is a source of electric waves, that is, the microwave, the microwave generator 19 guides the microwave oscillated by the magnetron 64 in the lower space 32 inside the main body 1 directly below the antenna housing 62. A tube 65, an antenna motor 66 disposed below the waveguide 65, an antenna holder 67 whose lower end is disposed inside the waveguide 65, and which is attached and fixed to the rotating shaft of the antenna motor 66, A cylindrical cable shaft 68 that is inserted and fixed in the antenna holder 67, and an antenna 69 that is attached and fixed to the center of the cable shaft 68 and is rotatably provided inside the antenna accommodating portion 62. Is composed of. Then, in a state where the upper surface opening of the antenna housing portion 62 is closed by the bottom plate 63, the entire antenna 69 is arranged parallel to the bottom plate 63 so as to face the flat plate-shaped bottom plate 63 forming the bottom wall 14b of the cooking chamber 14. It

The disk-shaped antenna 69 used here rotates about the cable shaft 68 below the bottom plate 63 by energizing the antenna motor 66, but moving a large disk causes a radio wave to be moved rather than moving a small disk. Since the area for stirring is increased, it is advantageous for suppressing uneven heating of the food S put in the cooking chamber 14. In addition, a portion near the inner wall surface of the cooking chamber 14 has a characteristic that the change of the radio wave is small and it is hard to be heated. Therefore, the diameter Ar of the antenna 69 is preferably 20 cm or more in order to suppress uneven heating of the food S more effectively than the conventional one.

Next, the cooling structure inside the main body 1 will be described with reference to FIGS. Inside the main body 1, in addition to the outdoor lower space 32 described above, an outdoor upper space 161, left and right outdoor side spaces 162, and an outdoor rear space 163 are provided between the outer surface of the cooking chamber 14 and the inner surface of the cabinet 2. It is formed. As shown in FIG. 10, in the outdoor lower space 32, the hot air motor 29, the first blower fan 164, the printed circuit board 165, the magnetron 64 of the microwave generator 19, the antenna motor 66, and the inverter 166 are arranged, respectively. To be done. The first blower fan 164, which is a centrifugal fan, is provided behind one side of the outdoor lower space 32 and has a fan case 167 that forms a wind tunnel therein, and an impeller 168 that is rotatably accommodated in the fan case 167. , And an electric motor 169 that gives a rotational force to the impeller 168, as main constituent elements. The fan case 167 is formed with an intake hole 170 for taking in cool air from the outside of the microwave oven through the main body 1 in the rotational axis direction of the impeller 168, and at the same time, in the outer peripheral direction of the impeller 168 orthogonal to the intake hole 170. Blower holes 171 and 172 for sending cold air to the cooled portion of the lower space 32 are formed.

The printed circuit board 165 is housed and held in the board mounting plate assembly 174 in front of the outdoor lower space 32, and an intake port 175 is opened on the rear side of the board mounting plate assembly 174 so as to face the ventilation hole 171. It is formed. Further, the inverter 166 serving as a drive power source for the magnetron 64 is housed and held in a bottom duct 176 provided at the rear of the outdoor lower space 32, and one side of the bottom duct 176 faces the air blow hole 171 and has an intake 177. Are formed as openings. On the other side of the bottom duct 176 and on the other rear side of the outdoor lower space 32, a hot air motor 29 that configures the hot air unit 24 is disposed, and separately from this, the bottom duct 176 includes other outdoor lower spaces 32. A cold air outlet 178 is formed so as to open toward the magnetron 64 provided substantially at the center of the side. As described above, in the present embodiment, in the outdoor lower space 32, the board mounting plate assembly 174 forms an air blowing path that guides cool air from the first air blowing fan 164 to the control board 165, while a bottom duct that is a separate member from this. The configuration is such that 176 forms an air blowing path that guides cold air from the first air blowing fan 164 to the hot air motor 29 and the magnetron 64.

The arrangement, shape, number, etc. of each component in the above-described outdoor lower space 32 can be appropriately changed in consideration of the blowing capacity of the first blowing fan 164.

11 and 12 show the respective configurations of the outdoor side space 162 on the right side when viewed from the front of the main body 1 and the outdoor upper space 161 which is continuous with the outdoor side space 162. In each of these drawings, the outdoor upper space 161 is formed between the upper surface of the cabinet 2 and the ceiling wall 14a of the cooking chamber 14, in which the above-described upper heater 18 is surrounded by the upper heat shield plate assembly 181. It is placed in a closed state. A hole 182 for wiring connection is formed in the upper heat shield plate assembly 181, and the upper heater 18 and the printed circuit board 165 can be electrically connected through the hole 182.

The right outdoor side space 162 is formed between the right side surface of the cabinet 2 and the right wall 14d of the cooking chamber 14, where the hinge mechanism 46, the interior lights 101a and 101b, and the first sensor are provided. 115, the sensor motor 116, and the second sensor 118, a door opening/closing detection means 184 for detecting opening/closing of the door 3 and a second blower fan 185 different from the above-mentioned first blower fan 164 are arranged. It Further, in the outdoor side space 162, a right heat shield plate assembly 187 similar to the upper heat shield plate assembly 181 is provided as a heat shield that shields the heat effect on the cabinet 2. Although not shown, the left side outdoor space 162 formed between the left side surface of the cabinet 2 and the left side wall 14c of the cooking chamber 14 has a hinge mechanism 46, a steam generator, and a heat shield. A left heat shield plate assembly is provided for each.

The door opening/closing detection means 184 is arranged in the upper front part of the outdoor side space 162 by a plurality of micro switches, and not only when the door 3 is closed with respect to the main body 1 but also when the door 3 is slightly opened. Is also detected. Upper and lower interior lamps 101a and 101b are arranged in the vicinity of the rear of the door opening/closing detection means 184, and between the micro switches of the door opening/closing detection means 184 and the interior lights 101a and 101b and the printed circuit board 165. Are electrically connected by wiring. The first sensor 115, the sensor motor 116, and the second sensor 118 are arranged vertically in a substantially central portion of the outdoor side space 162 in the front-rear direction. Holes 188 and 189 for wiring connection are formed in the right heat shield plate assembly 187, and the upper heater 18 and the printed circuit board 165 can be electrically connected through the hole 182.

The second blower fan 185, which is a centrifugal fan, is provided substantially outside the central portion of the outdoor side space 162, outside the right heat shield plate assembly 187, and forms a wind tunnel inside, and a fan case 191. An impeller 192 that is rotatably housed in the case 191 and an electric motor 193 that applies a rotational force to the impeller 192 are main components. The fan case 191 is formed with an intake hole 194 for taking in cool air from the outside of the microwave oven through the main body 1 in the rotational axis direction of the impeller 192, and on the other hand, in the outer peripheral direction of the impeller 192 orthogonal to the intake hole 194. Blower holes 195, 196, 197 are formed to blow cold air to the cooled portion of the sub-space 162.

Reference numeral 201 denotes a side duct that is provided in the outdoor side space 162 as a blower duct that guides cool air from the second blower fan 185 to each part. The side duct 201 is arranged so as to surround the blower holes 195, 196, 197 of the second blower fan 185, and from the duct base 202 to the cooled portion of the outdoor side space 162. It is composed of a plurality of extending arm portions 203 and 204. A cold air outlet 206 is formed in the duct base 202 toward the second sensor 118. Further, a cold air outlet 207 is formed at the tip of the arm portion 203 toward the door opening/closing detection means 184 and the inside lights 101a and 101b, and the first sensor 115 and the sensor motor 116 are also provided at the tip of the arm portion 204. A cold air outlet 208 is formed toward the. Although the second sensor 118 is not attached in FIG. 33, the second sensor 118 can be attached or detached according to the specifications of the product.

13 to 15 show the external configuration of the cabinet 2. In each of these drawings, reference numeral 211 is a rib that projects outward from the outer surface of the cabinet 2. Two ribs 211 are formed on the right side surface and the left side surface of the cabinet 2 so as to have two round convex shapes. Further, reference numeral 212 is a punching intake hole that faces the intake hole 194 of the second blower fan 185 and takes in cool air from the outside of the microwave oven. The intake hole 212 is formed on the right side surface of the cabinet 2, and ribs 211 are provided before and after the intake hole 212. The shape and number of the ribs 211 are not limited to those shown in the figure, and even when the ribs 211 come into contact with the installation wall surface when the microwave oven is installed at an arbitrary location, It is sufficient to prevent the heat from staying between the outer surface and the installation wall surface, and form the protruding height so that the cool air can be taken into the main body 1 from the intake hole 212.

FIG. 16 illustrates the main electrical configuration of the microwave oven. In the figure, reference numeral 221 denotes a control unit constituted by a microcomputer, and this control unit 221 is mounted on the above-mentioned printed circuit board 165, and has a CPU as an arithmetic processing unit, a memory as a storage unit, and a time counting unit. It is equipped with a timer and input/output devices.

In the cooking chamber 14, the input port of the control unit 221 includes the operation unit 7 using the keys and the touch panel described above, the temperature distribution detection unit 105 in the refrigerator, and the door open/close detection unit 184 that detects the open/closed state of the door 3. Inside temperature detecting means 222 such as a thermistor for detecting the temperature of the hot air, the hot air motor rotation detecting means 223 including the detecting sensor 45, the antenna position detecting means 225 for detecting the origin of rotation of the antenna 69, and the inside of the steam container described above. The vapor container detecting means 226 such as a thermistor for detecting the temperature of each is electrically connected.

At the output port of the control means 221, in addition to the display means 6 described above, a microwave heating means 231 including a magnetron and its driving means, an upper heater 18 for heating the grill, a hot air heater 27 for heating the oven, A heater driving means 232 such as a relay for electrically connecting and disconnecting each steam heating evaporation heater, an antenna driving means 233 for rotationally driving the antenna motor 66, and a hot air motor driving means for rotationally driving the hot air motor 29. 234, a sensor motor drive unit 235 for driving the sensor motor 116 in forward and reverse directions, a pump drive unit 236 for operating the water supply pump of the steam generator, and the interior lights 101a and 101b as illumination units. The interior lighting driving means 237 for driving the electric power source, the blower motor driving means 238 for individually driving the electric motor 169 of the first blower fan 164, and the electric motor 193 of the second blower fan 185 are electrically driven. Connected to.

The control means 221 receives the operation signal from the operating means 7, the inside temperature distribution detecting means 105, the inside temperature detecting means 222, the hot air motor rotation detecting means 223, the door opening/closing detecting means 184, and the antenna position detecting means. 225 and each detection signal from the vapor container detection means 226, the microwave heating means 231, the heater driving means 232, the antenna driving means 233, and the hot-air motor at predetermined timing based on the time counting from the timing means. A drive control signal is output to the drive unit 234, the sensor motor drive unit 235, the pump drive unit 236, the inside lighting drive unit 237, and the blower motor drive unit 238, and the display unit 6 is controlled for display. It has a function of outputting a signal.

When the control means 221 receives the operation signal associated with the operation of the operation means 7, when it determines that the door 3 is closed by the detection signal from the door opening/closing detection means 184, the control means 221 responds to the operation signal with a micro signal. Control signals are sent to the wave heating means 231, the heater driving means 232, the antenna driving means 233, the hot air motor driving means 234, the sensor motor driving means 235, and the pump driving means 236 to control various cooking. It is configured to do.

Next, the operation of the microwave oven having the above-described configuration will be described. With the food S to be cooked in the cooking chamber 14 in advance, the door 3 is closed while the handle 4 is held by hand, and the cooking menu is opened by the operating means 7. When the cooking start is instructed after the selection operation, the control signal generated corresponding to the selected cooking menu is output at a predetermined timing according to the control program incorporated in the storage unit of the control unit 221, and the cooking target S is It is cooked.

Here, for example, when the cooking menu of the oven heating is selected, the control signal from the control means 221 is sent to the heater driving means 232 and the hot air motor driving means 234 to energize the hot air heater 27 and the hot air motor 29, respectively, and the hot air is applied. The rotational force generated on the motor shaft 37 of the motor 29 is transmitted to the shaft 34 of the hot air fan 28 through the transmission mechanism 30. As a result, the hot air fan 28 rotates in one direction inside the heating chamber 31, and the speed thereof is taken into the control means 221 by the hot air motor rotation detection means 223 and sucked into the heating chamber 31 from the cooking chamber 14 through the suction port 16. The air is sent to the energized hot air heater 27 side, and the heated air is supplied as hot air F to the cooking chamber through the hot air outlet 17 to heat the cooked object S in the cooking chamber 14 by hot air convection heating. It

Further, in the present embodiment, in the oven heating cooking menu, the control means 221 receives a detection signal from the in-compartment temperature detection means 222 so that the temperature in the cooking chamber 14 reaches a maximum of 350° C. The operation of the hot air motor 29 can be controlled. In this case, as the inside of the cooking chamber 14 is exposed to the high temperature by the hot air F, far infrared rays R are effectively radiated from the entire inner surface of the cooking chamber 14 coated with the ceramic coating film 60, and the heating time is shortened. The uneven baking of the food S is improved more effectively. In particular, when the food S to be cooked is placed on the square plate 21 and heated in the oven, the hot air F circulates vertically in the cooking chamber 14 through the ventilation holes 21C of the plate 21, and the hot air F and the far infrared rays R cause the food to be cooked. It becomes possible to wrap S from the front, back, left and right and bake it.

When the cooking menu of the range heating is selected, the control means 221 receives the detection signal from the in-compartment temperature distribution detection means 105 and causes the antenna position detection means 225 to heat the cooking target S to the set temperature. While confirming the origin position of the antenna 69 by the detection signal of 1, the appropriate control signals are sent to the microwave heating means 231, the antenna driving means 233, and the sensor motor driving means 235, respectively. As a result, the magnetron of the microwave generator 19 and the antenna motor 66 are energized to supply the microwave generated from the surface of the rotating antenna 69 into the cooking chamber 14 and the object to be heated placed on the bottom wall 14b. S is heated by high frequency.

In such heating and cooking, the hot air motor 29, the magnetron 64, the control board 165, and the inverter 166 are used as the first heat generating portion arranged in the outdoor lower space 32 inside the main body 1 in accordance with the power supply control to each portion by the control unit 221. Temperature rises, and as the second heat generating portion arranged in the outdoor space 162, the interior lights 101a and 101b, the first sensor 115, the sensor motor 116, the second sensor 118, and door opening/closing detecting means. The temperature of 184 rises. Therefore, in the present embodiment, the control signal sent from the control unit 221 to the cold air motor driving unit 238 energizes the electric motor 169 of the first blower fan 164 and the electric motor 193 of the second blower fan 185, respectively. Cooling air is blown to the first heat generating portion and the second heat generating portion to suppress the temperature rise.

Specifically, when the impeller 168 rotates inside the fan case 167 by energizing the electric motor 169 of the first blower fan 164 shown in FIG. 10, the cool air taken into the intake hole 170 from the outside of the microwave oven is generated. The air is sent out from the air blowing hole 171 to the intake 175 of the board mounting plate assembly 174, and from another air blowing hole 172 to the intake 177 of the bottom duct 176. As a result, the cooling air introduced into the board mounting plate assembly 174 takes away the heat generated from the printed circuit board 165, and the cooling air introduced into the bottom duct 176 takes away the heat generated from the inverter 166. In addition, a part of the cooling air that has passed through the inside of the bottom duct 176 reaches the hot air motor 29 and takes away the heat generated from the hot air motor 29, and the remaining cooling air is sent out from the cold air outlet 178 to the magnetron 64 and the magnetron 64. Takes away the heat generated from. In this way, when the first fan 164 arranged in the outdoor lower space 32 inside the main body 1 is driven in response to the control signal from the control means 221, the hot air motor 29 and the magnetron 64 in the same outdoor lower space 32 inside the main body 1 are driven. Alternatively, the cooling air can be effectively blown to the control board 165 and the inverter 166 to simultaneously suppress the temperature rise of these heat generating portions. The air thus absorbed from the first heat generating portion (hereinafter, referred to as “heat absorbing air”) flows from the outdoor lower space 32 to the outdoor side space 162 and the outdoor rear space 163, and inside and outside the outdoor space 162. It rises in the rear space 163 and moves to the outdoor upper space 161.

Further, when the impeller 192 rotates inside the fan case 191 by energizing the electric motor 193 of the second blower fan 185 shown in FIG. 12 and FIG. 13, the cold air taken into the intake hole 194 from outside the microwave oven is generated. The air is blown out from the ventilation holes 195, 196, 197 to the duct base portion 202 of the side duct 201. As a result, the cooling air sent from the cold air outlet 206 of the duct base 202 to the second sensor 118 takes away the heat generated from the second sensor 118. Further, the cooling air guided from the duct base 202 to the arm 203 is sent from the cold air outlet 207 to the door opening/closing detecting means 184 and the inside lights 101a and 101b, and these door opening/closing detecting means 184 and inside lights 101a. , 101b takes heat generated from the duct base portion 202 to the other arm portion 204, and the cooling air is sent from the cold air outlet 208 to the first sensor 115 and the sensor motor 116, and the first sensor 115 and the sensor The heat generated from the motor 116 is taken away. In this way, when the second fan 185 arranged in the outdoor side space 162 inside the main body 1 is driven in response to the control signal from the control means 221, the inside lamp 101a, in the outdoor side space 162 inside the same main body 1, Cooling air can be effectively sent to 101b, the first sensor 115, the sensor motor 116, the second sensor 118, and the door opening/closing detecting means 184, and the temperature rise of these heat generating portions can be suppressed at the same time. .. The air thus absorbed from the second heat generating portion (hereinafter referred to as “heat absorbing air”) rises in the outdoor space 162 and moves to the outdoor upper space 161.

As described above, in the present embodiment, inside the main body 1, the hot air motor 29, the magnetron 64, the control board 165, and the inverter 166 arranged in the outdoor lower space 32 of the cooking chamber 14 are cooled by the first blower fan 164. Then, the inside lights 101a and 101b arranged in the outdoor side space 162 of the cooking chamber 14, the first sensor 115, the sensor motor 116, the second sensor 118, and the door opening/closing detection means 184 are provided in different units. It can be cooled by the two blower fans 185. In this case, the control unit 211 may control the driving of the first blower fan 164 and the second blower fan 185 simultaneously or separately. In any case, since each of the heat generating parts arranged in the outdoor lower space 32 and the outdoor side space 162 of the cooking chamber 14 is cooled by the two blower fans 164 and 185, respectively, the outdoor lower space 32 and the outdoor side space are cooled. A duct for guiding cooling air is not required between the heating element 162 and 162, and cooling air can be efficiently sent to each heat generating portion in the shortest time.

A vent passage 91 described later is formed in the outdoor upper space 161, and the outdoor upper space 161 is divided into an upper left space 92 formed on the left side by the ventilation passage 91 and an upper right space 93 formed on the right side. There is. The air passage 91 is a space independent of the upper left space 92 and the upper right space 93, and there is no movement of air between the air passage 91 and the upper left space 92 and the upper right space 93. Air can move between the upper right space 93 and the outdoor rear space 163. Therefore, the endothermic air absorbed from the first exothermic part and the endothermic air absorbed from the second exothermic part flow forward in the upper left space 92 and the upper right space 93, and from the opening 84 of the exhaust duct 81 to the oven. It is discharged outside the range.

As shown in FIG. 17, the ventilation path 91 includes a left partition wall 94 that partitions the ventilation path 91 and the upper left space 92, a right partition wall 95 that partitions the ventilation path 91 and the upper right space 93, and the ventilation path 91. It has a rear partition wall 96 for partitioning the outdoor rear space 163, and the left partition wall 94, the right partition wall 95, and the rear partition wall 96 are erected on the upper surface of the ceiling wall 14a of the cooking chamber 14, and the cabinet 2 Is fixed in contact with. The front ends of the left partition wall 94 and the right partition wall 95 are arranged in the opening 84 of the exhaust duct 81. Therefore, in the front view of the microwave oven, the opening 84 includes three openings that communicate with the upper left space 92, the air passage 91, and the upper right space 93 from the left side.

A plurality of communication holes 98 for communicating the ventilation passage 91 and the cooking chamber 14 are formed in the bottom portion 97 on the rear side of the ventilation passage 91. A damper 99 as an opening/closing portion is provided above the communication hole 98, and the communication hole 98 can be opened and closed by the damper 99. The damper 99 has a bottom plate 100 that comes into contact with the bottom portion 97 of the air passage 91, left and right side plates 107 that are provided upright at both left and right ends of the bottom plate 100, and a front plate 108 that is provided upright at the front end of the bottom plate 97. A horizontal bar 109 that connects the left and right side parts 107 is provided at the rear of the left and right side plates 107, and the upper end of a movable bar 110 that extends in the vertical direction is connected to the horizontal bar 109. The lower end of the movable rod 110 is connected to one end of a plate-shaped connecting portion 111. A shaft 113 of a stepping motor 112 arranged in the outdoor lower space 32 is connected to the other end of the connecting portion 111. Further, the damper 99 is provided with a shaft portion 114 fixed to the left and right side plates 107 in front of the horizontal bar 109, and the damper 99 is rotatable around the shaft portion 114.

Next, the movement of the damper 99 will be described. When the stepper motor 112 is driven from the state where the damper 99 closes the communication hole 98, the connecting portion 111 rotates with the rotation of the shaft 113, the movable rod 110 moves downward, and the rear side of the damper 99 is pulled downward. Therefore, the front side is lifted up around the shaft 114 to open the communication hole 98. When the shaft 113 of the stepping motor 112 is reversely rotated from the state where the communication hole 98 is opened, the rear side of the damper 99 is pushed up and the front side is lowered around the shaft portion 114 to close the communication hole 98. The damper 99 may be configured to slide back and forth to open and close the communication hole 98.

In the case of heating in an oven, the temperature inside the cooking chamber 14 reaches such a high temperature as to reach 350° C. at maximum, and therefore the communication hole 98 is normally closed during heating. When the communication hole 98 is closed, the high temperature air in the cooking chamber 14 is not discharged, the temperature in the cooking chamber 14 is unlikely to drop, and efficient cooking can be performed. On the other hand, in the case of range heating and superheated steam cooking, steam is generated in the cooking chamber 14, so that dew condensation occurs in the cooking chamber 14. Therefore, in the case of range heating, the communication hole 98 is opened and steam is discharged to the ventilation passage 91. During the movement of the vapor in the ventilation passage 91, the temperature of the vapor is lowered and a part thereof is liquefied. The liquefied water is stored in the bottom portion 97 of the ventilation passage 91 and naturally dried. As described above, by forming the communication hole 98 at the time of heating the range and cooking with the superheated steam, the dew condensation in the cooking chamber 14 can be suppressed. A storage case that stores liquefied water may be provided at the bottom 97 of the ventilation passage 91. In the storage case, for example, a concave groove may be formed on the bottom portion 97.

In the air passage 91, five obstacle plates 153, 154, 155, 156, 157 as obstacle portions are provided. The five obstacle plates 153, 154, 155, 156 and 157 are the first and second obstacle plates 153 and 154 connected to the left partition wall 94 and the first and second obstacle plates 154 connected to the right partition wall 95. The third partition plate 155 and the fourth partition plate 156, the first partition plate 153 and the third partition plate 155, and the second partition plate 154 and the fourth partition plate 156, and the left partition wall 94 and the right partition wall. It is composed of a fifth obstacle plate 157 which is not connected to 95. The steam that has flowed from the cooking chamber 14 into the ventilation passage 91 through the communication hole 98 has a gap between the first obstacle plate 153, the second obstacle plate 154, the third obstacle plate 155, the fourth obstacle plate 156, and the fifth obstacle plate 157. To flow. The obstacle plates 153, 154, 155, 156, 157 increase the moving distance of the steam flowing in the air passage 91, so that the steam forms the air passage 91 during the flow of the cabinet 2, the left partition wall 94, and the right partition. Heat is taken by the surrounding members such as the wall 95 to lower the temperature and liquefy. Therefore, high temperature air is not discharged from the opening 84. Note that the number and arrangement of the obstacle plates 153, 154, 155, 156, 157 can be arbitrarily changed as long as the vapor can be sufficiently liquefied.

As described above, in the present embodiment, the main body 1 having the cooking chamber 14 for accommodating the food to be cooked and the cabinet 2 as the outer shell covering the main body 1 are provided. An opening 84 is provided for discharging the air to the outside.

In this case, the air inside the microwave oven can be discharged from the front end of the upper surface of the microwave oven to the outside of the microwave oven. Therefore, high-temperature air is not discharged from the side surface and the back surface of the cabinet 2 of the microwave oven, so that the side surface and the back surface of the microwave oven approach the inner surface of the kitchen furniture 151, as shown in FIGS. 20 and 21. Can be stored.

In addition, in the present embodiment, between the main body 1 and the cabinet 2 as the outer shell body, a lower outdoor space 32 as a ventilation space through which air flows, an upper outdoor space 161, an outdoor space 162, an outdoor rear space. 163 is formed, and the outdoor lower space 32, the outdoor upper space 161, the outdoor space 162, and the outdoor rear space 163 communicate with the opening 84.

In this case, the air in the microwave oven can be discharged from the opening 84 to the outside of the microwave oven by flowing through the outdoor lower space 32, the outdoor upper space 161, the outdoor space 162, and the outdoor rear space 163. Therefore, high-temperature air is not discharged from the side surface and the back surface of the cabinet 2 of the microwave oven, so that the side surface and the back surface of the microwave oven can be stored close to the inner surface of the kitchen furniture 151.

Further, in the present embodiment, a communication hole 98 for discharging air from the inside of the cooking chamber 14 is formed in the upper portion of the main body 1, and a ventilation path 91 that communicates the communication hole 98 and the opening portion 84 is formed. Does not communicate with the outdoor lower space 32, which serves as a ventilation space, the outdoor upper space 161, the outdoor space 162, and the outdoor rear space 163.

In this case, the steam in the cooking chamber 14 can be liquefied in the ventilation passage 91, and the air can be discharged from the opening 84 to the outside of the microwave oven. Further, since the ventilation passage 91 is not in communication with the outdoor lower space 32, the outdoor upper space 161, the outdoor space 162, and the outdoor rear space 163, the steam generated in the cooking chamber 14 causes the outdoor lower space 32 and the outdoor upper space to flow. 161, the outdoor side space 162, and the outdoor rear space 163 can be prevented from moving.

Further, in the present embodiment, a damper 99 is provided as an opening/closing portion that opens/closes the communication hole 98.

In this case, the damper 99 can control the discharge of the steam generated in the cooking chamber 14.

Further, in the present embodiment, the air passage 91 has a first obstacle plate 153, a second obstacle plate 154, and a third obstacle plate as obstacles for increasing the distance that air flows from the communication hole 98 to the opening 84. A plate 155, a fourth obstacle plate 156, and a fifth obstacle plate 157 are formed.

In this case, the moving distance of the vapor flowing in the ventilation passage 91 becomes long, and the temperature of the vapor decreases in the ventilation passage 91 to be liquefied. Therefore, high temperature steam can be prevented from being discharged from the opening 84 to the outside of the microwave oven.

In addition, in the present embodiment, the opening 84 is formed elongated in the left-right direction.

In this case, the opening area of the opening 84 can be increased without increasing the height H of the opening 84. Therefore, a large amount of air can be discharged from the opening 84.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, although the ventilation passage is provided in the central portion in the left-right direction of the outdoor upper space, it may be provided in either the left or right side.

1 Main body 2 Cabinet (outer shell)
14 Cooking room 32 Outside lower space (ventilation space)
84 opening 91 ventilation path 98 communication hole 99 damper (opening and closing part)
153 First obstacle plate (obstacle)
154 Second obstacle plate (obstacle)
155 Third obstacle plate (obstacle)
156 4th obstacle plate (obstacle)
157 Fifth Obstacle Plate (Obstacle)
161 Outdoor upper space (ventilation space)
162 Outdoor space (ventilation space)
163 Outdoor rear space (ventilation space)
S to be cooked

Claims (4)

A main body having a cooking chamber for accommodating an object to be cooked,
An outer shell that covers the main body,
An opening for discharging the internal air to the outside is provided at the front end of the upper surface of the outer shell ,
A ventilation space in which air flows is formed between the main body and the outer shell,
The ventilation space communicates with the opening,
A communication hole for discharging air from the cooking chamber is formed in the upper portion of the main body,
An air passage that connects the communication hole and the opening is formed,
Said vent passage cooking device, wherein independent spaces der Rukoto movement is not air to and from the ventilation space. The heating cooker according to claim 1 , further comprising an opening/closing unit that opens/closes the communication hole. The heating cooker according to claim 1 or 2 , wherein an obstacle is formed in the air passage to increase a distance in which air flows from the communication hole to the opening. Heating cooker according to any one of claims 1 to 3, characterized in that said opening is elongated formed in the lateral direction.