JP2007225241A - Heating cooking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize a temperature effect to a kitchen cabinet by minimizing a temperature rise of an outer casing part of a heating cooking apparatus housed in the kitchen cabinet. <P>SOLUTION: The heating cooking apparatus has a control panel 29 having a suction opening 32, a substantially U-shaped cabinet 2, a back plate 3, a bottom plate 4, a plurality of openings 7 formed in a neighborhood of a portion wherein the bottom plate 4 and the cabinet 2, and the bottom plate 4 and the back plate 3 contact each other, a second cabinet 5 and a second back plate 6 provided in an inner side of a body 1 surrounded by the cabinet 2 and the back plate 3, and an exhaust duct 33 provided in a body 1 rear upper part. A blow fan 37 is provided in an exhaust duct 33 neighborhood, outside air is sucked in from the suction opening 32 of the control panel 2 and the openings 7 of the back plate 4 by the blow fan 37, a space part 8 composed between the cabinet 2, the back plate 3, the second cabinet 5 and the second back plate 6 is cooled, and exhaust is carried out from the exhaust duct 33. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooking device such as a built-in type microwave oven with an oven function, which is used in general households, and is particularly used by being incorporated in a kitchen cabinet.

  Conventionally, this kind of built-in type microwave oven cooker with an oven function is embedded in the lower part of a gas stove or induction cooker, and the heating chamber and the inside of the main body become hot after cooking. The heat of the air and the heat of the exhaust heat the surrounding cabinet and the food contained in the cabinet, causing discoloration of the material used in the cabinet and deterioration of the food in the cabinet.

  In order to solve such a problem, a proposal has been made to provide an exhaust air passage that forcibly guides hot air generated by heating cooking to an exhaust port by cooling air from a blower, and prevents overheating around the heating chamber. (For example, refer to Patent Document 1).

JP 2005-3324 A

  However, in the above-described conventional technology, the hot air generated by heating the heat source at the time of cooking is forced to flow to the exhaust port by flowing the cooling air from the blowing means to the air passage. Since the temperature of the unit is very high, it cannot be cooled sufficiently even if the cooling air is passed through the air path, the temperature of the outer shell of the main unit will be high, and the temperature of the kitchen cabinet in which the main unit is stored will also increase, making it fully functional Could not be demonstrated.

  In addition, since the air passage through which the cooling air flows is provided around the heating chamber, the entire cooking device is prevented from being made compact.

  The present invention has been made to solve the above problems, and claim 1 is a heating chamber that accommodates an object to be heated, a high-frequency generator that supplies a high frequency into the heating chamber, and heating the heating chamber. A cooking device comprising a heating device, a machine room in which electronic components for control are accommodated, and a blower fan that sends cooling air to the machine room, a door that covers the front portion of the main body, and an intake of outside air A control panel having an air inlet, a substantially U-shaped cabinet that covers the outermost part of the main body, a back plate that covers the back surface portion, a bottom plate that covers the bottom surface portion, the bottom plate, the cabinet, and the bottom plate and the back plate. And a plurality of openings formed in the vicinity of the portion in contact with the second cabinet, a second cabinet and a second back plate provided inside the main body surrounded by the cabinet and the back plate, and a rear upper portion of the main body. And an exhaust duct provided. A blower fan is provided in the vicinity of the duct, and the blower fan sucks outside air from the inlet of the control panel and the opening of the bottom plate, and between the cabinet and the back plate, the second cabinet and the second back plate. The configured space is cooled and exhausted from the exhaust duct.

  According to a second aspect of the present invention, the high-frequency generator is cooled and blown into the heating chamber, the exhaust air passage communicating the heating chamber and the exhaust duct, and the machine chamber communicating with the exhaust duct. And an exhaust air passage.

  According to a third aspect of the present invention, during heating by the heating device, air is blown into the heating chamber so that cold air does not flow from the exhaust duct into the heating chamber via the exhaust air passage communicating the heating chamber and the exhaust duct. The blower fan is driven with a weak output.

  Since the cooking device of the present invention is configured as described above, the temperature rise of the cabinet and the back plate, which are the outer parts of the cooking device, can be suppressed to a low level. Therefore, the cooking device for a kitchen in which the cooking device body is incorporated. It is possible to prevent discoloration of materials used such as wood constituting the cabinet, and to minimize discoloration and decay of seasonings and other ingredients stored in the kitchen cabinet.

  Moreover, since the heating cooker body can be made compact, the heating chamber of the heating cooker incorporated in the kitchen cabinet of a predetermined size can be increased in capacity, and the usability can be improved.

  In addition, since the heating efficiency of the heating chamber by the oven heater is good, the temperature rises quickly and is convenient.

  An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a longitudinal sectional view of a main part viewed from the front of a microwave oven with an oven function according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of a principal part viewed from the right side, and FIG. 3 is incorporated in a kitchen cabinet. The principal part longitudinal cross-sectional view seen from the front of the state and FIG. 4 are the principal part longitudinal cross-sectional views similarly seen from the right side surface.

  In the figure, 1 is a main body, and 2 is a substantially U-shaped cabinet that covers the outermost shell of the main body 1 and covers the upper surface and both side surfaces. 3 is a back plate that covers the back surface of the main body 1, and 4 is a bottom plate that covers the bottom surface of the main body 1.

  5 is a second cabinet, 6 is a second back plate, and is provided for heat insulation inside the main body 1 surrounded by the cabinet 2 and the back plate 3, and the cabinet 2, the back plate 3, The portion where the cabinet 2 and the bottom plate 4 are in contact with each other and the back plate 3 and the bottom plate 4 are arranged so that the outside air can be taken into the space 8 formed by being surrounded by the second cabinet 5 and the second back plate 6. A plurality are provided near the contacting portion.

  Reference numeral 9 denotes a heating chamber for accommodating an object to be heated provided at a substantially central portion of the main body 1, which has a plurality of step portions 10 on the left and right sides, on which an oven dish (not shown) is placed, if necessary. Put the object to be heated and cook.

  11 is a recess provided in the bottom of the heating chamber 9, 12 is a rotary antenna provided in the recess 11, 13 is a motor for rotating the rotary antenna 12, and 14 is a microwave heating high frequency provided in the lower part of the heating chamber 9. A magnetron 15 serving as a (microwave) generator is a waveguide, and the microwave output from the magnetron 14 is opened through the waveguide 15 in the center of the recess 11 which is a storage space for the rotating antenna 12. It is transmitted to the rotating antenna 12 through a hole (not shown), and is uniformly radiated and supplied into the heating chamber 9 by the rotating antenna 12 rotated by the motor 13.

  Reference numeral 16 a denotes a plurality of openings opened at the center of the rear wall surface of the heating chamber 9. Reference numeral 16 b denotes a plurality of openings opened in the peripheral portion of the rear wall surface of the heating chamber 9. An oven heater 17 is a heating device that heats the inside of the heating chamber 9, and is provided on the back side of the openings 16 a and 16 b on the rear wall surface of the heating chamber 9.

  Reference numeral 18 denotes a circulation fan provided substantially at the center of the oven heater 17, 19 denotes a fan motor that drives the circulation fan 18, and 20 denotes a cooling fan that is driven by the fan motor 19 to cool the fan motor 19. When the chamber 9 is heated in the oven, the oven heater 17 is energized, and the circulation fan 18 is rotated by energization of the fan motor 19 and sucks from the opening 16a at the center of the rear wall as shown by the arrow a, and the oven as shown by the arrow b. The hot air heated by the heater 17 is sent into the heating chamber 9 from the opening 16b in the peripheral portion to form a convection type oven.

  Reference numeral 21 denotes a grill heater which is a heating device for heating the heating chamber 9. The grill heater is provided at the upper portion of the heating chamber 9 and is energized when the grill is heated to heat an object to be heated from the upper portion of the heating chamber 9.

  A heat insulating material 22 is used to insulate heat transmitted from the heating chamber 9 to the periphery. The grill is provided further behind the oven heater 17 at the rear of the heating chamber 9, on the left and right side portions, and above the heating chamber 9. It is provided further above the heater 21 and below the heating chamber 9.

  A machine room 23 is provided in a space sandwiched between the heating chamber 9, the second cabinet, and the second back plate, and includes a control board and electronic components for controlling the entire heating cooker. Etc. are paid.

  Reference numeral 24 denotes an air inlet provided in the bottom plate 4, and 27 denotes a blower fan provided so as to suck air from the air inlet 24. The blower fan 27 sucks outside air from the air inlet 24 and is stored in the machine room 23. The control board and electronic components are blown and cooled.

  Reference numeral 26 denotes a door, which is provided so as to cover the front surface of the main body 1 and allows an object to be heated to be taken in and out of the heating chamber 9.

  25 is a plurality of openings formed in the left side wall of the heating chamber 9, 40 is an air duct connecting the magnetron 14 and the opening 25, 31 is an air inlet provided in the bottom plate 4, and 30 is the air intake The blower fan is provided so as to suck air from the port 31. The blower fan 30 blows and cools the outside air sucked from the suction port 31 to the magnetron 14 and heats the cooled air via the blower duct 40. It is put into the heating chamber 9 through the opening 25 on the left side wall surface of the chamber 9 and sprayed onto a glass window (not shown) of the door 26 so that the inner surface is not fogged.

  Reference numeral 29 denotes a control panel provided at the upper front of the main body 1, and this control panel 29 is provided with operation buttons (not shown). By operating these operation buttons, oven cooking, grill cooking, and cooking using a microwave oven are performed. It can be performed.

  Reference numeral 32 denotes an air inlet provided in the control panel 29, from which outside air flows into the upper portion of the heating chamber 9 inside the main body 1.

  Reference numeral 33 denotes an exhaust duct provided at an upper rear portion of the main body 1. The inside of the exhaust duct 34, 35, and 36 is an exhaust air path 34, an exhaust air path 35, and an exhaust air path 36.

  The exhaust air passage 34 draws outside air from the opening 7 provided in the bottom of the main body 1 and the air inlet 32 provided in the control panel 29 by a blower fan 37 provided in the vicinity of the exhaust duct 33, Like c, the wind which flows through the space part 8 and cools the cabinet 2 and back plate 3 of the outermost part of the main body 1 flows.

  The exhaust air passage 35 draws in outside air from the air inlet 24 at the bottom of the main body 1 by the blower fan 27, and flows into the machine chamber 23 as indicated by an arrow d to flow wind for cooling the control board, electronic components, and the like.

  The exhaust air passage 36 has a plurality of openings 25 on the left side of the heating chamber 9 through the air duct 40 after the outside air sucked by the blower fan 30 from the air inlet 31 at the bottom of the main body 1 cools the magnetron 14 as indicated by an arrow e. The air enters the heating chamber 9 and flows together with a part of the humidity in the heating chamber 9 from the opening 38 at the top of the heating chamber 9 through the exhaust duct 28 as indicated by an arrow f.

  39 is a communication pipe, and the cooling air discharged to the exhaust duct 33 is incorporated into the upper part of the kitchen cabinet 101 in which the main body 1 is incorporated through the communication pipe 39. In this embodiment, the exhaust air from the induction heating cooker 102 is exhausted. It is connected to the duct 103, discharged through the exhaust duct 103 of the induction heating cooker 102, and finally discharged to the outside by a ventilation fan or a range hood attached to the kitchen.

  The effect | action by the above structure is demonstrated.

  In the case of microwave heating, the temperature of the magnetron 14, the control board for control, electronic parts, etc. rises, but it does not affect the outside of the main body 1 thermally, so cooking by oven heating with the greatest thermal influence is performed. Will be described first.

  First, although depending on the food, when the control panel 29 is operated to perform the preheating step, the oven heater 17 and the grill heater 21 are energized to heat the heating chamber 9. At the same time, the circulation fan 18 and the cooling fan 20 are operated by the operation of the fan motor 19, and the hot air heated by the oven heater 17 is sucked from the opening 16a opened at the center as indicated by arrows a and b. It is discharged into the heating chamber 9 from the opening 16b, circulates in the heating chamber 9, raises the temperature in the heating chamber 9, and reaches the maximum temperature in a short time. Then, after maintaining for several minutes, the user is informed of the end of the preheating process with a buzzer sound of the control board, etc., so that the food to be heated is placed on the oven pan, Placed on both the lower stage and the middle stage, the control panel 29 is operated to set an appropriate temperature and time, and when started, a cooking process is performed in which cooking is performed at the set temperature and the set time.

  On the other hand, the outside air sucked by the operation of the blower fan 27 provided at the bottom of the main body 1 goes around the machine room 23 in the main body 1 as indicated by an arrow d, and cools and exhausts the control board, electronic components and other parts. It is pushed out from the exhaust duct 33 to the communication pipe 39 through the air passage 35.

  Further, due to the operation of the blower fan 37 provided in the exhaust duct 33 part, the outside air sucked from the plurality of openings 7 provided in the bottom part of the main body 1 and the intake port 32 provided in the control panel 29 part is a space. Passing through the portion 8, the outermost portion of the main body 1 is cooled as indicated by an arrow c, and pushed out from the exhaust duct 33 through the exhaust duct 33 to the communication pipe 39.

  As a result, the cooled outermost part of the main body 1 is far from the heat source and is isolated by the second cabinet 5 and the second back plate 6, so that the temperature rise is small and the cabinet 2 at the outermost part of the main body 1. The temperature rise of the back plate 3 and the back plate 3 can be kept low, preventing discoloration of the materials used in the surrounding kitchen cabinet, and minimizing changes such as discoloration and decay of the seasoning and other ingredients stored in the kitchen cabinet. It is possible to hold it to the limit.

  Therefore, the cooling air is caused to flow through the entire space 8 that is surrounded by the cabinet 2, the back plate 3, the second cabinet 5, and the second back plate 6. Even if the thickness dimension of 8 is reduced, the cooling effect is large, so that the main body 1 can be made compact.

  At this time, exhaust from the exhaust air passage 35 by the blower fan 27 and exhaust from the exhaust air passage 34 by the blower fan 37 merge and are connected to the communication pipe 39 and exhausted at the exhaust duct 33 portion. The pressure of the exhaust air inside the duct 33 becomes high, and the cooling air of the exhaust duct 33 flows into the heating chamber 9 through the exhaust duct 28 communicating with the heating chamber 9 connected to the exhaust duct 33. However, the blower fan 30 provided at the bottom of the main body 1 is operated weakly below the rated output, and the outside air sucked from the intake port 31 passes through the blower duct 40 from the opening 25 provided in the heating chamber 9. A flow that blows into the heating chamber 9 and generates a blowing pressure as indicated by an arrow f from the opening 38 at the top of the heating chamber 9 via the exhaust duct 28 and flows into the heating chamber 9 from the exhaust duct 33. Balance, it is possible to prevent the cooling air that is about to flow into the end heating chamber 9.

  Therefore, in oven cooking, the cooling air is blown into the heating chamber 9 and the temperature of the heating chamber 9 is not lowered, and the heating efficiency of the heating chamber 9 can be prevented from being lowered.

  The pressure of the exhaust air inside the exhaust duct 33 varies depending on the length of the communication pipe 39 connected to the exhaust duct 33, the shape of the communication pipe 39, the shape of the exhaust part exhausted to the outside from the communication pipe 39, and the like. The cooling fan may be prevented from being blown into the heating chamber 9 by changing the output of the blower fan 30 that is operated according to the situation of installing the main body to adjust the blower pressure.

  Next, cooking by microwave heating will be described. When the food is placed on the microwave heating dish, placed on the lower stage of the step portion 10, the heating time is set by operating the control panel 29, the magnetron 14 is energized and output from the magnetron 14. Microwaves are transmitted to the rotating antenna 12 via a waveguide 15 through a hole (not shown) formed in the center of a recess 11 provided at the bottom of the heating chamber 9 and rotated by a motor 13. The rotating antenna 12 uniformly radiates into the heating chamber 9 and heats the food.

  At this time, the blower fan 30 and the blower fan 27 provided at the bottom of the main body 1 are energized, and the blower fan 37 provided near the exhaust duct 33 is not energized. The outside air sucked by the operation of the blower fan 30 cools the magnetron 14 and then enters the heating chamber 9 through the blower duct 40 through the plurality of openings 25 on the left side surface of the heating chamber 9, and the glass window of the door 26. (Not shown) After flowing so as not to be cloudy on the inner surface, it flows from the opening 38 at the top of the heating chamber 9 to the exhaust duct 33 through the exhaust duct 28 and is exhausted to the communication pipe 39. Moisture that has flown out is discharged without accumulating in the heating chamber 9, and the glass window inner surface of the door 26 portion is not fogged, so that a clear state is always maintained.

  In addition, the outside air sucked by the operation of the blower fan 27 travels through the machine room 23 in the main body 1, cools the control board, electronic components, and other parts, and from the exhaust air duct 35 to the communication pipe 39 from the exhaust duct 33. It is pushed out.

  In addition, when the outer temperature of the main body 1 becomes high during microwave heating by cooking, the outer temperature of the main body 1 can be lowered by energizing the blower fan 37.

  Thus, the temperature rise of the cabinet 2 and the back plate 3 which are the outer parts of the heating cooker can be kept low, and therefore the materials used such as wood constituting the kitchen cabinet in which the heating cooker body 1 is incorporated. In addition to preventing discoloration, it is possible to minimize changes such as discoloration and spoilage of seasonings and other ingredients stored in the kitchen cabinet.

  Moreover, since the heating cooker main body 1 can be comprised compactly, the heating chamber 9 of the heating cooker incorporated in the system kitchen of the decided magnitude | size can be made large-capacity, and usability can be improved.

  Moreover, since the heating efficiency of the heating chamber 9 by the oven heater 17 is good, the temperature rises quickly and is easy to use.

It is a principal part longitudinal cross-sectional view seen from the front of the heating cooker which shows one Example of this invention. It is the principal part longitudinal cross-sectional view similarly seen from the right side surface. It is the principal part longitudinal cross-sectional view seen from the front of the state assembled in the kitchen cabinet. It is the principal part longitudinal cross-sectional view similarly seen from the right side surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Cabinet, 3 ... Back plate, 4 ... Bottom plate, 5 ... Second cabinet, 6 ... Second back plate, 7 ... Opening part, 8 ... Space part, 9 ... Heating chamber, 14 ... Magnetron , 17 ... Oven heater, 23 ... Machine room, 26 ... Door, 27, 30, 37 ... Blower fan, 29 ... Control panel, 32 ... Intake port, 33 ... Exhaust duct, 35, 36 ... Exhaust air passage.

Claims (3)

  A heating chamber that houses an object to be heated, a high-frequency generator that supplies a high frequency into the heating chamber, a heating device that heats the heating chamber, a machine room that houses electronic components for control, and the machine room A cooking device provided with a blower fan that sends cooling air, a door that covers the front of the main body, a control panel that has an air inlet for sucking outside air, and a substantially U-shaped cabinet that covers the outermost shell of the main body A back plate covering the back surface portion, a bottom plate covering the bottom surface portion, a plurality of openings formed in the vicinity of the bottom plate and the cabinet, and a portion where the bottom plate and the back plate are in contact with each other, the cabinet and the back surface A second cabinet and a second back plate provided on the inner side of the main body surrounded by the plate, and an exhaust duct provided in the upper rear portion of the main body, provided with a blower fan in the vicinity of the exhaust duct, The fan is controlled by the blower fan. Outside air is sucked in from the air inlet of the panel and the opening of the bottom plate, and the space formed between the cabinet and the back plate and the second cabinet and the second back plate is cooled and exhausted from the exhaust duct. A cooking device characterized by that.   A cooling fan that cools the high-frequency generator and blows air to the heating chamber, an exhaust air passage that communicates the heating chamber and the exhaust duct, and an exhaust air passage that communicates the machine room and the exhaust duct. The cooking device according to claim 1, further comprising a cooking device. When the heating device is heated, the blower fan that blows air to the heating chamber is weakened so that cold air does not flow from the exhaust duct to the heating chamber via the exhaust air passage communicating the heating chamber and the exhaust duct. The cooking device according to claim 2, wherein the cooking device is driven by an output.

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