JP2013044506A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker that cools a substrate with an exhaust fan of a heating chamber while preventing degradation in heating efficiency during preheating operation.SOLUTION: A power supply board 80 is arranged in an air in-take passage leading from an outside air inlet 55 for receiving outside air by an exhaust fan 30 to the exhaust fan 30. When an internal temperature Tc detected by an internal temperature sensor 29 is 30°C or less during preheating operation, and a set temperature Ts for the preheating operation is not higher than 210°C set in advance, an exhaust fan control part controls the exhaust fan 30 to rotate at a rotational speed lower than a normal rotational speed. When the internal temperature Tc detected by the internal temperature sensor 29 is 30°C or less during preheating operation, and the set temperature Ts for the preheating operation is not higher than 150°C set in advance, the exhaust fan control part stops the exhaust fan 30.

Description

  The present invention relates to a cooking device.

  Conventionally, as a heating cooker, there is one provided with an exhaust fan that exhausts exhaust in a heating chamber to the outside (see, for example, JP 2011-75126 A (Patent Document 1)). In the heating cooker, the exhaust fan is rotated at a low speed during the preheating operation in which the object to be heated is not heated, thereby preventing the heating efficiency from being lowered due to the exhaust.

  However, in such a heating cooker, in the configuration in which the substrate is disposed at a position where the cooling air of the electrical component disposed in the main body casing cannot sufficiently supply cooling air, a cooling fan is provided separately. There is a problem that the structure is complicated and the cost is increased.

JP 2011-75126 A

  Then, the subject of this invention is providing the heating cooker which can cool a board | substrate with the fan for exhaustion of a heating chamber, preventing the fall of the heating efficiency at the time of a preheating operation.

In order to solve the above problems, the heating cooker of the present invention is:
A body casing;
A heating chamber disposed in the main body casing and provided with an exhaust port;
An exhaust path having one end connected to the exhaust port of the heating chamber;
A fan that sucks in outside air from the outside air introduction port provided in the main body casing, and discharges the exhaust from the exhaust port of the heating chamber to the outside through the exhaust path by the sucked outside air;
A substrate disposed in a suction path from the outside air inlet through which the outside air is sucked by the fan to the fan; and
A temperature sensor for detecting a temperature corresponding to the temperature of the substrate;
In the preheating operation, when a temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than a preset temperature, and a set temperature during the preheat operation is equal to or less than a preset reference set temperature, And a fan control unit that controls the fan so as to rotate or stop the fan at a rotational speed lower than a normal rotational speed.

  According to the above configuration, in the preheating operation in which the inside of the heating chamber is preheated to the set temperature without heating the object to be heated, the temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than the preset temperature, and When the set temperature during the preheating operation is equal to or lower than a preset reference set temperature, the fan control unit rotates or stops the fan at a rotation speed lower than the normal rotation speed. For example, when the set temperature of the preheating operation is an intermediate temperature range (for example, 150 ° C. to 210 ° C.) or a low temperature range (for example, 150 ° C. or less), the radiant heat from the heating chamber is small and the temperature of the substrate does not increase so much. Little or no cooling by the fan is required. Therefore, when the set temperature of the preheating operation is in the middle temperature range or low temperature range, the fan is rotated at a rotation speed lower than the normal rotation speed or stopped to accelerate the temperature rise to the set temperature in the heating chamber. It becomes possible to reduce the power consumption during the preheating operation.

  On the other hand, in the preheating operation, when the temperature corresponding to the temperature of the substrate detected by the temperature sensor is higher than a preset temperature, or the set temperature during the preheating operation is higher than a preset reference set temperature (That is, when the set temperature of the preheating operation is in a high temperature range (for example, a temperature range higher than 210 ° C.), the temperature of the substrate becomes high due to radiant heat from the heating chamber. At this time, the fan control unit can rotate the fan at the normal rotation speed, and the substrate disposed in the suction path can be cooled by the outside air sucked from the outside air introduction port.

  In this way, it is possible to realize a heating cooker capable of cooling the substrate with a fan for exhausting the heating chamber while preventing a decrease in heating efficiency during the preheating operation.

Moreover, in the heating cooker of one embodiment,
The temperature sensor is an internal temperature sensor that detects the temperature in the heating chamber having a correlation with the temperature of the substrate.

  Since the board | substrate arrange | positioned in a main body casing is mainly influenced by the radiant heat from a heating chamber, the temperature in a heating chamber and the temperature of a board | substrate have a correlation. For this reason, it becomes possible to detect the temperature in the heating chamber by the internal temperature sensor and to estimate the temperature of the substrate from the detected temperature in the heating chamber. Therefore, according to the said embodiment, the temperature sensor which detects the temperature in the heating cabinet provided in the heating cooker can be used together for estimation of the temperature of a board | substrate, without providing a board | substrate temperature sensor separately, and a structure Can be simplified and the cost can be reduced.

Moreover, in the heating cooker of one embodiment,
The fan control unit rotates the fan at the normal rotational speed when at least the preheating operation is completed and an operation for cooking the next object to be heated is started.

  According to the above-described embodiment, the fan control unit rotates the fan at the normal rotation speed when at least the preheating operation is finished and starts an operation for cooking the next object to be heated. Oil smoke or steam generated from the object to be heated can be reliably discharged to the outside through the exhaust path from the exhaust port of the heating chamber.

Moreover, in the heating cooker of one embodiment,
The fan control unit
As the reference set temperature, a first reference set temperature and a second reference set temperature higher than the first reference set temperature are used,
In the preheating operation, a temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than the preset temperature, and the set temperature during the preheat operation is higher than the first reference set temperature. And when the set temperature during the preheating operation is equal to or lower than the second reference set temperature, the fan is rotated at a rotation speed lower than the normal rotation speed,
In the preheating operation, when the temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than the preset temperature, and the set temperature during the preheat operation is equal to or lower than the first reference set temperature. The fan is stopped.

  According to the embodiment, in the preheating operation, the temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than the preset temperature, and the set temperature during the preheating operation is higher than the first reference set temperature. When the temperature is high and the set temperature during the preheating operation is equal to or lower than the second reference set temperature (that is, the preheat operation is in the middle temperature range (first reference set temperature <set temperature ≦ second reference set temperature)) ) By rotating the fan at a rotation speed lower than the normal rotation speed, the substrate that is slightly affected by the radiant heat from the heating chamber can be cooled.

  On the other hand, in the preheating operation, when the temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than the preset temperature and the set temperature during the preheating operation is equal to or lower than the first reference set temperature (that is, preheating). When the operation is in a low temperature range (set temperature ≦ first reference set temperature), the fan is stopped. At this time, the substrate that is hardly affected by the radiant heat from the heating chamber may not be cooled.

  In this way, the fan can be controlled in accordance with the temperature range of the preheating operation, and efficient preheating operation and substrate cooling can be performed.

Moreover, in the heating cooker of one embodiment,
The temperature sensor is a substrate temperature sensor that detects the temperature of the substrate disposed in the suction path or the ambient temperature of the substrate,
The fan control unit rotates the fan at a rotation speed lower than the normal rotation speed or stops the fan during the preheating operation, or detects the temperature of the substrate detected by the substrate temperature sensor or the substrate temperature. When the ambient temperature becomes equal to or higher than a preset upper limit substrate temperature, the fan is rotated at the normal rotation speed.

  According to the above embodiment, the substrate detected by the substrate temperature sensor when the fan is rotated at a rotation speed lower than the normal rotation speed during the preheating operation or when the fan is stopped during the preheating operation. When the temperature of the board (or the ambient temperature of the board) exceeds the preset upper limit board temperature, the fan control unit rotates the fan at the normal rotation speed. And it can cool quickly.

Moreover, in the heating cooker of one embodiment,
The exhaust path is configured to discharge the diluted exhaust to the outside by mixing and diluting the outside air sucked by the fan from the outside of the main casing and the exhaust from the exhaust port of the heating chamber. Has been.

  According to the embodiment, in the exhaust path, the outside air sucked by the fan from the outside of the main body casing and the exhaust from the exhaust port of the heating chamber are mixed and diluted, and the diluted exhaust is discharged to the outside. As a result, the exhaust temperature can be lowered to prevent burns and external condensation.

  As is clear from the above, according to the heating cooker of the present invention, it is possible to realize a heating cooker that can cool a substrate with an exhaust fan of a heating cabinet while preventing a decrease in heating efficiency during preheating operation. Can do.

FIG. 1 is a perspective view of a heating cooker according to an embodiment of the present invention as seen from the front and obliquely above. FIG. 2 is a schematic diagram of a longitudinal section viewed from the front of the heating cooker. FIG. 3 is a schematic diagram of a longitudinal section viewed from the right side of the cooking device. FIG. 4 is a control block diagram of the cooking device. FIG. 5 is a flowchart for explaining the preheating operation in the cooking by the cooking device. FIG. 6 is a schematic diagram of a longitudinal section viewed from the front of a heating cooker according to another embodiment of the present invention.

  Hereinafter, the cooking device of the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1: has shown the front perspective view of the heating cooker of one Embodiment of this invention.

  In the heating cooker of this embodiment, as shown in FIG. 1, a door 2 is attached to the front of a rectangular parallelepiped main body casing 1 so as to rotate about the lower end side. A handle 3 is attached to the upper portion of the door 2 and a heat-resistant glass 4 is attached to the approximate center of the door 2. An operation panel 5 is provided on the right side of the door 2. The operation panel 5 includes a liquid crystal display unit 6 and an operation button group 7 operated by a user. Further, an exhaust port cover 8 having an exhaust port 8a is provided on the upper side of the main casing 1 and on the right rear side. Further, a dew receiving device 9 is detachably attached below the door 2 of the main casing 1.

  Moreover, FIG. 2 shows the schematic diagram of the longitudinal cross section seen from the front of the said heating cooker, and FIG. 3 has shown the schematic diagram of the longitudinal cross section seen from the right side of this heating cooker.

  As shown in FIGS. 2 and 3, a water supply tank 11 detachably inserted from the front side is disposed on the right side of the heating chamber 10, and a steam generator 12 is disposed on the rear side of the water supply tank 11. Yes. The steam generator 12 is connected to the water supply tank 11 and generates steam by heating a heater (not shown). One end of the steam supply passage 13 is connected to the steam generator 12, and the other end of the steam supply passage 13 is connected to the circulation unit 14.

  Water supplied from the water supply tank 11 is heated by the steam generator 12 to generate saturated water vapor. The saturated steam generated by the steam generator 12 is supplied from the steam supply port 13 a to the downstream side of the suction port 28 in the circulation unit 14 through the steam supply passage 13.

  The steam supply port 13 a of the steam supply passage 13 is disposed in the vicinity of the suction port 28 in the circulation unit 14. A circulation fan 18 is disposed in the circulation unit 14 so as to face the suction port 28. The circulation fan 18 is driven by a circulation fan motor 19.

  A steam duct 100 bent in an L shape is attached so as to cover the upper surface and the left side surface of the heating chamber 10. The steam duct 100 includes a first duct portion 110 fixed to the upper surface side of the heating chamber 10, a bent portion 120 that bends downward from the left side of the first duct portion 110, and a left side surface side of the heating chamber 10. A second duct portion 130 that is fixed and is continuous with the first duct portion 110 via the bent portion 120 is provided.

  A heater 21 composed of a sheathed heater or the like is accommodated in the first duct portion 110 of the steam duct 100. The first duct portion 110 of the steam duct 100 and the heater 21 constitute a superheated steam generator. Note that the superheated steam generator may be provided separately from the steam duct.

  The right side of the first duct portion 110 of the steam duct 100 communicates with a steam supply port 14 a provided in the upper part of the circulation unit 14. A plurality of first steam outlets 24 are provided on the top surface of the heating chamber 10, and the first duct portion 110 of the steam duct 100 communicates with the inside of the heating chamber 10 via the first steam outlet 24. ing. On the other hand, the second duct portion 130 of the steam duct 100 communicates with the inside of the heating chamber 10 through a plurality of second steam outlets 25 provided on the left side surface of the heating chamber 10.

  The gap between the heating chamber 10 and the steam duct 100 is sealed with a heat resistant resin or the like. The heating chamber 10 and the steam duct 100 are covered with a heat insulating material except for the front opening of the heating chamber 10.

  The circulation path of the heat medium is formed by the circulation unit 14, the steam duct 100, the heating chamber 10, and the connecting member connecting them. And the saturated water vapor | steam produced | generated with the steam generator 12 is supplied to the boundary part with the heating chamber 10 of the circulation unit 14 in this circulation path.

  Here, the heating medium may be heated air, may be heated air containing water vapor, may be air containing superheated steam heated to 100 ° C. or higher, and The main component may be superheated steam heated to 100 ° C. or higher.

  In addition, a magnetron 20 (shown in FIG. 3) as an example of a microwave generator is disposed below the heating chamber 10. The microwave generated by the magnetron 20 is guided to the lower center of the heating chamber 10 by a waveguide (not shown), and radiates upward in the heating chamber 10 while being stirred by a rotating antenna (not shown). Then, the object to be heated 23 is heated. In this case, the article to be heated 23 is placed on the bottom of the heating chamber 10.

  In addition, a suction port 28 is provided at the center of the right side wall of the heating chamber 10, an air supply port (not shown) is provided on the front side of the suction port 28 on the right side wall of the heating chamber 10, and the rear surface of the suction port 28 is provided. A first exhaust port 36 is provided on the side. The air supply port is arranged in the vicinity of the door 2, and the outside air blown out from the air supply port flows into the heating chamber 10 along the door 2. A second exhaust port 37 having an opening area smaller than that of the first exhaust port 36 is provided on the lower right side of the rear side wall surface of the heating chamber 10.

  A circulation fan motor 19 for driving the circulation fan 18 is attached to the circulation unit 14 disposed on the right side surface of the heating chamber 10. Steam and air in the heating chamber 10 are sucked from the suction port 28 by the circulation fan 18 and blown out from the first and second steam outlets 24 and 25 through the steam duct 100 into the heating chamber 10. Further, in the vicinity of the suction port 28 of the circulation unit 14, an interior temperature sensor 29 that detects the temperature of the heat medium (air containing steam) in the heating chamber 10 is disposed.

  The object to be heated 23 in the heating chamber 10 is heated by the radiant heat of the heater 21 disposed in the first duct portion 110 of the steam duct 100. Further, the heating medium (air containing steam) passing through the steam duct 100 is heated by the heater 21, and the heated heating medium is blown out from the first and second steam outlets 24 and 25. Thereby, the heat medium in the heating chamber 10 is maintained at a predetermined temperature. Further, the steam supplied to the heating chamber 10 can be further heated by the heater 21 to generate superheated steam at 100 ° C. or higher.

  A cooling fan unit 22, an electrical component unit 17, and a magnetron 20 are disposed below the main body casing 1. The cooling fan unit 22 includes a cooling fan 15 and a cooling fan motor 16 that drives the cooling fan 15.

  Further, the air duct 31 is disposed on the right side of the heating chamber 10 in the main body casing 1. An exhaust fan 30 as an example of a fan in the present invention and an exhaust fan motor 38 that drives the exhaust fan 30 are housed in the air duct 31.

  The electrical component part 17 includes a drive circuit that drives each part of the cooking device, a control circuit that controls the drive circuit, and the like. The cooling fan 15 takes outside air into the main casing 1 and cools the electrical component part 17 and the magnetron 20 that generate heat. Further, a part of the outside air flowing into the main body casing 1 by the cooling fan 15 is guided into the air duct 31 by the exhaust fan 30, and the remaining outside air is an opening formed on the back surface of the main body casing 1 (see FIG. (Not shown) is discharged to the outside.

  As a result, the electrical component part 17 and the magnetron 20 are cooled by the cooling fan 15, but there are parts that cannot be cooled by the cooling fan 15 depending on the position where they are arranged. For example, the power supply board 80 arranged in the vicinity of the right side surface in the main casing 1 is not in the air path of the cooling fan 15 and needs to be separately cooled. Here, the power supply substrate 80 is an example of the substrate according to the present invention, and a noise filter, a relay, or the like is mounted on the substrate.

  As shown in FIG. 3, the 1st exhaust duct 34 connected to the right side wall of the heating chamber 10 from the 1st exhaust port 36 via the exhaust damper (not shown) is arrange | positioned. The first exhaust duct 34 has a lateral passage 34a extending in the lateral direction and a longitudinal passage 34b bent upward from the lateral passage 34a. An exhaust port cover 8 is detachably attached to the upper end of the vertical passage 34b.

  A suction port (not shown) for sucking outside air through the suction duct 27 is provided on the back side of the lateral passage 34 a of the first exhaust duct 34. The exhaust damper is controlled so that either one of the suction port or the first exhaust port 36 is alternatively selected and connected to the first exhaust duct 34. The exhaust damper is driven by an exhaust damper motor 60 (shown in FIG. 4).

  The vertical passage 34 b of the first exhaust duct 34 is connected to the exhaust port cover 8 with the flow passage area being enlarged upward. The exhaust port cover 8 is formed with an exhaust port 8a having an open end opened forward.

  On the other hand, the lower end of the second exhaust duct 35 is connected to the second exhaust port 37, and the upper end of the second exhaust duct 35 is connected to the lower side of the vertical passage 34 b of the first exhaust duct 34. The second exhaust port 37 is an example of the exhaust port in the present invention. Further, the second exhaust duct 35 and the first exhaust duct 34 constitute an example of the exhaust path in the present invention.

  The second exhaust duct 35 has a smaller flow area than the first exhaust duct 34. The exhaust from the second exhaust port 37 flows into the first exhaust duct 34 via the second exhaust duct 35 and is discharged to the outside from the exhaust port 8 a of the exhaust port cover 8.

  The air duct 31 on the side of the heating chamber 10 includes an exhaust fan housing portion 31a, a vertical passage 31b extending upward from the exhaust fan 30, a horizontal passage 31c bent from the vertical passage 31b to the rear side, and a horizontal passage. The nozzle portion 31d is bent upward from 31c. The lateral passage 31c and the nozzle portion 31d are inserted into the first exhaust duct 34.

  An opening 31 e is provided at the upper end of the nozzle portion 31 d of the air duct 31. As a result, an ejector is formed in the first exhaust duct 34, and an air flow from the first exhaust port 36 toward the exhaust port 8 a is generated by the exhaust fan 30.

  Further, a concave portion is formed in the horizontal passage 31c of the blower duct 31 so as to be recessed below the lower end of the connection portion with the vertical passage 31b, and a sub nozzle portion that opens into the first exhaust duct 34 at one end of the concave portion. 31f is formed.

  Further, one end of the air supply passage 32 is connected to the upper portion of the vertical passage 31 b of the air duct 31, and the other end of the air supply passage 32 is connected to the air supply damper 40. The air supply passage 32 and the air supply damper 40 are part of an air supply mechanism for supplying air to the heating chamber 10 via the air supply port by the exhaust fan 30.

  The exhaust fan 30 sucks outside air from the outside air inlet 55 provided on the back side of the main casing 1. The outside air sucked into the blower duct 31 by the exhaust fan 30 exhausts the exhaust from the second exhaust port 37 of the heating chamber 10 to the outside through the second exhaust duct 35 and the first exhaust duct 34. A power supply board 80 is arranged in the suction path from the outside air inlet 55 through which the outside air is sucked by the exhaust fan 30 to the exhaust fan 30.

  FIG. 4 shows a control block diagram of the heating cooker. The cooking device includes a control device 200 including a microcomputer and an input / output circuit in the electrical component section 17 (shown in FIGS. 2 and 3). The control device 200 includes a heater 21, a circulation fan motor 19, a cooling fan motor 16, an exhaust fan motor 38, an air supply damper motor 44, an exhaust damper motor 60, an operation panel 5, an internal temperature sensor 29, The feed pump 70, the steam generator 12, and the magnetron 20 are connected. Based on the signal from the operation panel 5 and the detection signal from the internal temperature sensor 29, the control device 200 includes the heater 21, the circulation fan motor 19, the cooling fan motor 16, the exhaust fan motor 38, and the air supply damper. The motor 44, the exhaust damper motor 60, the operation panel 5, the feed water pump 70, the steam generator 12 and the magnetron 20 are controlled.

  The control device 200 includes an exhaust fan control unit 200 a as an example of a fan control unit that controls the exhaust fan 30.

  FIG. 5 is a flowchart for explaining the preheating operation in the cooking by the cooking device.

  First, when the cooking operation is started, it is determined in step S1 shown in FIG. 5 whether or not it is a preheating operation. If it is determined that the operation is a preheating operation, the process proceeds to step S2. On the other hand, if it determines with it not being a preheating driving | operation at step S1, it will progress to step S7.

  Next, in step S2, it is determined whether the internal temperature Tc detected by the internal temperature sensor 29 is 30 ° C. or less. If it is determined in step S2 that the internal temperature Tc is 30 ° C. or lower, the process proceeds to step S3, whereas if it is determined that the internal temperature Tc is higher than 30 ° C., the process proceeds to step S7.

  Next, in step S3, it is determined whether or not the set temperature Ts is 150 ° C. (first reference set temperature) or less. If it is determined that the set temperature Ts is 150 ° C. or less, the process proceeds to step S8, and the exhaust fan control is performed. The exhaust fan 30 is stopped by the part 200a, and the process proceeds to step S6.

  On the other hand, if it is determined in step S3 that the set temperature Ts is higher than 150 ° C., the process proceeds to step S4, and it is determined whether or not the set temperature Ts is 210 ° C. (second reference set temperature) or less. If it is determined in step S4 that the set temperature Ts is 210 ° C. or less, the process proceeds to step S5, where the exhaust fan control unit 200a rotates the exhaust fan 30 at a low rotational speed (1800 rpm in this embodiment), Proceed to S6.

  If it is determined in step S6 that the preheating operation has been completed, the process proceeds to step S7, where the exhaust fan control unit 200a rotates the exhaust fan 30 at the normal rotational speed (3000 rpm in this embodiment), and the process ends. Then, heat cooking is performed.

  In this embodiment, it is determined in step S2 whether the internal temperature Tc is 30 ° C. or lower. However, the temperature is not limited to 30 ° C. If the temperature in the heating chamber 10 is set to a temperature at which it can be determined whether it is normal temperature or not. Good.

  According to the heating cooker having the above-described configuration, in the preheating operation in which the inside of the heating chamber 10 is preheated to the set temperature Ts without heating the article 23 to be heated, the internal temperature Tc (power supply substrate 80 detected by the internal temperature sensor 29). Is equal to or lower than a preset temperature (30 ° C. in this embodiment), and the preset temperature Ts during the preheating operation is a preset reference set temperature (first reference set temperature or When the temperature is equal to or lower than the second reference set temperature), the exhaust fan control unit 200a rotates or stops the exhaust fan 30 at a rotational speed lower than the normal rotational speed. When the set temperature Ts for such preheating operation is an intermediate temperature range (for example, 150 ° C. to 200 ° C.) or a low temperature range (for example, 150 ° C. or less), the radiant heat from the heating chamber 10 is small and the temperature of the power supply substrate 80 is Since it does not rise so much, the cooling by the exhaust fan 30 may be little or unnecessary. Therefore, when the set temperature Ts of the preheating operation is in the middle temperature range or the low temperature range, the exhaust fan 30 is rotated at a rotation speed lower than the normal rotation speed or stopped to reach the set temperature Ts in the heating chamber 10. It is possible to reduce power consumption during preheating operation while speeding up the temperature rise.

  On the other hand, in the preheating operation, the internal temperature Tc (temperature corresponding to the temperature of the power supply substrate 80) is higher than a preset temperature (30 ° C. in this embodiment), or the set temperature Ts during the preheating operation. Is higher than the preset reference set temperature (second reference set temperature) (that is, when the set temperature Ts of the preheating operation is in a high temperature range (for example, a temperature range higher than 210 ° C.)) The temperature of the power supply substrate 80 increases due to the radiant heat from 10 or the like. At this time, the exhaust fan control unit 200a rotates the exhaust fan 30 at the normal rotation speed, and the power supply board 80 arranged in the suction path can be cooled by the outside air sucked from the outside air introduction port 55.

  Thus, it is possible to realize a cooking device capable of cooling the substrate (the power supply substrate 80 in this embodiment) with the exhaust fan 30 while preventing a decrease in heating efficiency during the preheating operation.

  Moreover, since the power supply substrate 80 arranged in the main body casing 1 is mainly affected by the radiant heat from the heating chamber 10, the temperature in the heating chamber 10 and the temperature of the power supply substrate 80 have a correlation with each other. Therefore, the internal temperature sensor 29 detects the internal temperature Tc, and the temperature of the power supply substrate 80 can be estimated from the detected internal temperature Tc. Therefore, the internal temperature sensor 29 provided in the cooking device can be used in combination with the estimation of the temperature of the power supply substrate 80, and the configuration can be simplified and the cost can be reduced without providing a separate substrate temperature sensor.

  Further, the exhaust fan control unit 200a rotates the exhaust fan 30 at the normal rotation number at least when the preheating operation is finished and the next cooking operation is started, so that the object to be heated 23 is heated during the cooking operation. Can be reliably discharged from the second exhaust port 37 of the heating chamber 10 to the outside through the exhaust path.

  In the preheating operation, the internal temperature Tc detected by the internal temperature sensor 29 (the temperature corresponding to the temperature of the power supply substrate 80) is equal to or lower than a preset temperature (30 ° C. in this embodiment), The set temperature Ts during the preheating operation is higher than the first reference set temperature (150 ° C. in this embodiment), and the set temperature Ts during the preheat operation is the second reference set temperature (210 in this embodiment). ° C), that is, when the preheating operation is in the middle temperature range (first reference set temperature <set temperature Ts <second reference set temperature), the exhaust fan 30 is rotated at a speed lower than the normal speed. The power supply substrate 80 that is slightly affected by the radiant heat from the heating chamber 10 can be cooled. On the other hand, in the preheating operation, the internal temperature Tc (temperature corresponding to the temperature of the power supply substrate 80) detected by the internal temperature sensor 29 is equal to or lower than a preset temperature (30 ° C. in this embodiment), When the set temperature Ts during the preheating operation is equal to or lower than the first reference set temperature (150 ° C. in this embodiment), that is, when the preheating operation is in the low temperature range, the exhaust fan 30 is stopped to stop the heating. The power supply substrate 80 that is hardly affected by the radiant heat from the storage 10 may not be cooled. As described above, the exhaust fan 30 can be controlled in accordance with the temperature range of the preheating operation, so that the efficient preheating operation and the cooling of the substrate can be performed.

  Further, in the exhaust path (second exhaust duct 35, first exhaust duct 34), the outside air sucked by the exhaust fan 30 from the outside of the main body casing 1 and the exhaust from the second exhaust port 37 of the heating chamber 10 are mixed. By diluting and exhausting the diluted exhaust to the outside, the exhaust temperature can be lowered to prevent burns and prevent external condensation.

  In the above-described embodiment, the temperature of the power supply board 80 is estimated based on the internal temperature Tc detected by the internal temperature sensor 29. However, the present invention is not limited to this. For example, as shown in FIG. A substrate temperature sensor 54 that detects the temperature (or the ambient temperature of the power supply board 80) may be disposed on the power supply board 80 (or in the vicinity of the power supply board 80). In this case, it is detected by the substrate temperature sensor 54 when the exhaust fan 30 is rotated at a lower rotational speed than the normal rotational speed during the preheating operation or when the exhaust fan 30 is stopped during the preheating operation. When the temperature of the power supply substrate 80 (or the ambient temperature of the power supply substrate 80) becomes equal to or higher than a preset upper limit substrate temperature, the exhaust fan control unit 200a rotates the exhaust fan 30 at the normal rotation speed, thereby supplying power during the preheating operation. When the temperature of the substrate 80 rises, the power supply substrate 80 can be reliably and rapidly cooled.

  In the above embodiment, the cooling fan 15 that cools the electrical component portion 17 and the magnetron 20 is provided on the lower side in the main casing 1. However, the suction path from the outside air inlet to the exhaust fan is provided without the cooling fan. The suction path may be configured so that the electrical component part, the magnetron, and the like are disposed therein, and the electrical component part and the magnetron may be cooled.

  In addition, examples of the cooking device according to the present invention include not only an oven range that uses superheated steam, but also an oven that uses superheated steam, an oven range that does not use superheated steam, and an oven that does not use superheated steam.

  In the cooking device of the present invention, healthy cooking can be performed by using superheated steam or saturated steam in a microwave oven or the like. For example, in the cooking device of the present invention, superheated steam or saturated steam having a temperature of 100 ° C. or higher is supplied to the food surface, and the superheated steam or saturated steam adhered to the food surface is condensed to give a large amount of condensation latent heat to the food. So it can efficiently transfer heat to food. Moreover, when condensed water adheres to the food surface and salt and oil are dropped together with condensed water, salt and oil in the food can be reduced. Further, the inside of the heating chamber is filled with superheated steam or saturated steam to be in a low oxygen state, thereby enabling cooking while suppressing food oxidation. Here, the low oxygen state refers to a state where the volume% of oxygen is 10% or less (for example, 0.5 to 3%) in the heating chamber.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Main body casing 2 ... Door 3 ... Handle 4 ... Heat-resistant glass 5 ... Operation panel 6 ... Liquid crystal display part 7 ... Operation button group 8 ... Exhaust port cover 8a ... Exhaust port 9 ... Dew receptacle 10 ... Heating chamber 11 ... Water supply tank DESCRIPTION OF SYMBOLS 12 ... Steam generator 13 ... Steam supply passage 13a ... Steam supply port 14 ... Circulation unit 14a ... Steam supply port 15 ... Cooling fan 16 ... Motor for cooling fan 17 ... Electrical component part 18 ... Circulation fan 19 ... Motor for circulation fan 20 ... Magnetron 21 ... Heater 22 ... Tray 23 ... Object to be heated 24 ... First steam outlet 25 ... Second steam outlet 26 ... Front panel 27 ... Suction duct 28 ... Suction port 29 ... Inside temperature sensor 30 ... Exhaust fan 31 ... Air duct 32 ... Air supply passage 34 ... First exhaust duct 35 ... Second exhaust duct 36 ... First exhaust port 37 ... Second exhaust port 38 ... Exhaust fan Motor 40 ... Air supply damper 41 ... Damper main body 41a ... Shaft part 41b ... Guide part 60 ... Exhaust damper motor 70 ... Water pump 100 ... Steam duct 110 ... First duct part 120 ... Bent part 130 ... Second duct part 200 ... Control device 200a: Exhaust fan control unit

Claims (6)

A body casing;
A heating chamber disposed in the main body casing and provided with an exhaust port;
An exhaust path having one end connected to the exhaust port of the heating chamber;
A fan that sucks in outside air from the outside air introduction port provided in the main body casing, and discharges the exhaust from the exhaust port of the heating chamber to the outside through the exhaust path by the sucked outside air;
A substrate disposed in a suction path from the outside air inlet through which the outside air is sucked by the fan to the fan; and
A temperature sensor for detecting a temperature corresponding to the temperature of the substrate;
In the preheating operation, when a temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than a preset temperature, and a set temperature during the preheat operation is equal to or less than a preset reference set temperature, A heating cooker, comprising: a fan control unit that controls the fan so as to rotate or stop the fan at a rotation speed lower than a normal rotation speed. The heating cooker according to claim 1, wherein
The cooking device according to claim 1, wherein the temperature sensor is an internal temperature sensor that detects a temperature in the heating chamber having a correlation with a temperature of the substrate. The heating cooker according to claim 1 or 2,
The said fan control part rotates the said fan at the said normal rotation speed at least when the said pre-heating driving | operation is complete | finished and the driving | operation which heat-cooks the next to-be-heated material is started, The heating cooker characterized by the above-mentioned. In the heating cooker according to any one of claims 1 to 3,
The fan control unit
As the reference set temperature, a first reference set temperature and a second reference set temperature higher than the first reference set temperature are used,
In the preheating operation, a temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than the preset temperature, and the set temperature during the preheat operation is higher than the first reference set temperature. And when the set temperature during the preheating operation is equal to or lower than the second reference set temperature, the fan is rotated at a rotation speed lower than the normal rotation speed,
In the preheating operation, when the temperature corresponding to the temperature of the substrate detected by the temperature sensor is equal to or lower than the preset temperature, and the set temperature during the preheat operation is equal to or lower than the first reference set temperature. The cooking device characterized by stopping the fan. The heating cooker according to claim 1, wherein
The temperature sensor is a substrate temperature sensor that detects the temperature of the substrate disposed in the suction path or the ambient temperature of the substrate,
The fan control unit rotates the fan at a rotation speed lower than the normal rotation speed or stops the fan during the preheating operation, or detects the temperature of the substrate detected by the substrate temperature sensor or the substrate temperature. When the ambient temperature is equal to or higher than a preset upper limit substrate temperature, the fan is rotated at the normal rotation speed. In the heating cooker according to any one of claims 1 to 5,
The exhaust path is configured to discharge the diluted exhaust to the outside by mixing and diluting the outside air sucked by the fan from the outside of the main casing and the exhaust from the exhaust port of the heating chamber. A cooking device characterized by being made.

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